CN110552145B

CN110552145B - Impeller for drum washing machine and drum washing machine

Info

Publication number: CN110552145B
Application number: CN201810553671.9A
Authority: CN
Inventors: 吴迪; 郝兴慧; 刘会; 劳春峰
Original assignee: Qingdao Haier Washing Machine Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Machine Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2018-05-31
Filing date: 2018-05-31
Publication date: 2023-04-11
Anticipated expiration: 2038-05-31
Also published as: CN110552145A

Abstract

The invention discloses a rotary drum washing machine impeller and a rotary drum washing machine, wherein the impeller is disc-shaped; the periphery of the disk-shaped impeller is provided with a multi-stage concave-convex structure so as to rub and wash the clothes in the drum by using the rotating acting force. The concave-convex structure is arranged on the outer periphery of the impeller, so that the rubbing acting force of the impeller on clothes in the drum washing machine is improved, and the aim of improving the washing efficiency of the drum washing machine is fulfilled.

Description

Impeller for drum washing machine and drum washing machine

Technical Field

The invention relates to a drum washing machine in the field of household appliances, in particular to a impeller structure for the drum washing machine.

Background

The existing drum washing machine is generally provided with an outer drum in the washing machine, the outer drum is internally provided with an inner drum which is driven by a motor to rotate, after clothes are put into the inner drum, a small amount of washing water flows into the outer drum to wet the clothes, so that the clothes and the washing water containing detergent are fully mixed; and then, the motor is used for driving the inner barrel to rotate, the structures such as lifting ribs arranged in the inner barrel are used for lifting and beating the clothes, and the clothes are washed by beating acting force. The drum washing machine of the above prior art has the following disadvantages: the drum washing machine only relies on beating after lifting the clothes for washing, and does not have rubbing effect on the clothes, so that the washing efficiency of the clothes is poor.

Therefore, the applicant specially proposes the drum washing machine with the impeller structure, so as to realize that the clothes form rubbing acting force under the action of the impeller and the inner drum by utilizing differential rotation between the impeller and the inner drum, and further realize quick washing of the clothes.

In addition, how to arrange a wave wheel, the wave wheel and the inner drum act on the clothes together to form rubbing acting force becomes a problem which needs to be solved urgently. In addition, if a kneading force is formed between the impeller and the inner drum, the radial size of the impeller needs to be large, and how to install the large-size impeller in the inner drum of the drum washing machine becomes a problem to be solved.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to provide a drum washing machine, which aims to achieve the purposes of rubbing the clothes to be washed in an inner drum by the differential rotation of the inner drum and a wave wheel in the washing process and improving the washing efficiency of the drum washing machine. Meanwhile, another objective of the present invention is to provide a pulsator structure to achieve the purpose of assembling a large-sized pulsator inside an inner tub of a drum washing machine. In addition, the invention also aims to provide a wave wheel structure to achieve the purposes of increasing the rubbing acting force between the wave wheel and the inner drum and improving the washing cleanliness of the drum washing machine. In addition, another objective of the present invention is to provide a pulsator structure, so as to achieve the purpose of rapidly assembling and molding pulsator components.

In order to realize the purpose, the invention adopts the following specific technical scheme:

a wave wheel for a drum washing machine is in a disc shape; the periphery of the disk-shaped impeller is provided with a multi-stage concave-convex structure so as to rub and wash the clothes in the drum by using the rotating acting force.

Furthermore, concave parts and convex parts are alternately arranged on the periphery of the disc-shaped impeller along the rotating circumferential direction of the impeller; preferably, the concave portions and the convex portions extend in a radial direction of the disc-shaped pulsator.

Furthermore, a circle of folded edge bent towards one side is arranged on the periphery of the disc-shaped impeller, and a concave-convex structure with height difference in the radial direction and/or the axial direction of the impeller is arranged on the folded edge.

Furthermore, the extending end of the folded edge is in a wave shape which is arranged in a concave-convex mode, and the wave-shaped extending end face forms a concave-convex structure of the impeller axial height difference.

Furthermore, the inner circumference of the folded edge is provided with a plurality of sections of convex parts protruding towards the center direction of the impeller, so that the inner circumferential wall of the folded edge forms a concave-convex structure with the radial height difference of the impeller.

Furthermore, the convex parts arranged on the edge folds of the wave wheel and the convex parts of the wave wheel protruding towards the edge folds are arranged in the same radial section of the wave wheel in a one-to-one correspondence way; preferably, the convex portion and the convex portion in the same radial cross section are arranged to communicate with each other.

Furthermore, all concave-convex structures on the disk-shaped impeller are symmetrically distributed relative to the center of the impeller; preferably, the convex parts arranged on the peripheral folded edge of the wave wheel are symmetrically distributed relative to the center of the wave wheel.

The invention also provides a drum washing machine, wherein the bottom of the inner barrel is covered and installed with any one of the wave wheels, the periphery of the wave wheel extends to the inner wall of the inner barrel, the periphery of the wave wheel is not contacted with the inner wall of the inner barrel, the wave wheel and the inner barrel are respectively connected with a driving motor of the washing machine through a clutch mechanism, and the inner barrel and the wave wheel can generate differential rotation to generate rubbing acting force to wash clothes.

Furthermore, the edge of the wave wheel is bent and extended towards one side of the opening of the inner cylinder.

Furthermore, the wave wheel and the inner cylinder are coaxially arranged and correspondingly cover the bottom of the inner cylinder.

Compared with the prior art, the invention has the following beneficial effects:

the concave-convex structure is arranged on the outer periphery of the impeller, so that the rubbing acting force of the impeller on clothes in the drum washing machine is improved, and the aim of improving the washing efficiency of the drum washing machine is fulfilled.

The edgefolds bent towards the opening side of the inner barrel are arranged on the periphery of the impeller, so that when the impeller selects in the drum washing machine, relative displacement is generated between the edgefolds on the periphery of the impeller and the wall of the inner barrel, rubbing acting force is applied to clothes moving close to the wall in the inner barrel, and washing efficiency of the drum washing machine is improved.

Meanwhile, the invention has simple structure and obvious effect and is suitable for popularization and use.

Drawings

The present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic sectional view of a drum type washing machine according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic view of an assembly structure of a vane of the pulsator in an embodiment of the present invention;

FIGS. 4 and 5 are schematic structural diagrams of different viewing angles of a splicing member of the pulsator in the embodiment of the present invention;

fig. 6 is a schematic structural view of a pulsator connection part in an embodiment of the present invention.

Description of the main elements: 100-inner tube, 101-inner tube bottom, 200-impeller, 201-blade, 202-connecting part, 203-concave-convex structure, 204-splicing structure, 1-fan-shaped structure, 2-hem, 3-support hem, 4-supporting part, 5-limiting groove, 6-limiting rib, 7-convex part, 8-concave part, 9-mounting groove, 10-connecting disc, 11-first splicing part, 12-second splicing part, 13-circular arc supporting rib, 14-connecting sleeve, 15-radial supporting rib, 16-second circular arc supporting rib, 17-screw column, 18-torus, 19-sleeve-shaped reinforcing rib and 20-connecting hole.

Detailed Description

As shown in fig. 1 to 6, an embodiment of the present invention provides a drum washing machine including: an outer cylinder, wherein an inner cylinder 100 is sleeved in the outer cylinder; the impeller 200 is installed in the inner tub 100, the outer periphery of the impeller 200 extends to the inner wall of the inner tub 100, and the outer periphery of the impeller 200 is not in contact with the inner wall of the inner tub 100, the impeller 200 and the inner tub 100 are respectively connected with a driving motor of the washing machine through a clutch mechanism, so that the inner tub 100 and the impeller 200 can generate differential rotation to generate a rubbing acting force to wash the clothes.

In the embodiment of the present invention, the pulsator 200 is disposed to cover the inner drum bottom 101, and the pulsator 200 and the inner drum 100 are disposed coaxially and rotate around a common axis independently.

The impeller which covers the bottom of the inner barrel is arranged in the drum washing machine, so that the impeller can independently rotate relative to the inner barrel under the action of the driving motor of the drum washing machine, differential rotation is formed between the impeller and the inner barrel, the constant rubbing washing effect on clothes is achieved by utilizing the relative movement between the periphery of the impeller and the wall of the inner barrel, and the washing efficiency of the clothes is improved.

In the embodiment of the invention, a driving motor is arranged on the drum washing machine, a rotor of the driving motor is connected with a speed reduction clutch, a wave wheel shaft of the speed reduction clutch is connected with a wave wheel 200, and an inner cylinder shaft is connected with an inner cylinder 100, so that the inner cylinder 100 and the wave wheel 200 are respectively controlled to rotate at the same speed to execute a rinsing and dehydrating program or rotate at a different speed to execute a washing program under the distribution action of the speed reduction clutch; preferably, when the washing machine performs a washing process, the pulsator 200 and the inner tub 100 perform differential motion in opposite directions of rotation, so as to further increase the relative force between the pulsator and the inner tub wall and enhance the rubbing efficiency of the drum washing machine on the laundry.

Example one

As shown in fig. 1 to 6, in the present embodiment, a pulsator structure is disclosed, which includes a plurality of splicing structures 204 independently arranged from each other, and the splicing structures 204 are sequentially spliced with each other to form a disc-shaped pulsator 200.

The impeller is formed by mutually splicing a plurality of splicing structures, so that a plurality of smaller units are mutually spliced to form a larger impeller structure, and the aim of splicing and assembling the impeller is fulfilled; meanwhile, through the arrangement, the impeller which is large in size and cannot directly extend into the inner barrel from the barrel opening of the inner barrel can be assembled and molded inside the inner barrel, and the assembling efficiency of the washing machine is improved.

In this embodiment, the splicing structures 204 that form the impeller 200 and are spliced with each other may have any shape, and at least one side of each splicing structure 204 and the corresponding side of the adjacent splicing structure 204 are spliced with each other and fixedly connected, so that the splicing structures 204 are fixedly connected with each other to form a complete disk-shaped impeller structure. In this embodiment, the connecting structure that fixedly connects the corresponding overlapping portions of the adjacent splicing structures may be any existing connecting structure form, for example: the corresponding overlapped parts of the adjacent splicing structures are mutually clamped and fixedly connected through the action of clamping claws or mutually engaged and fixedly connected through the action of bolts and threads, and the like. Meanwhile, in this embodiment, the corresponding overlapping portions of the adjacent splicing structures may also be directly and fixedly connected, and the connection manner adopted by the connection method may be any existing connection form, for example, the corresponding overlapping portions of the adjacent splicing structures are directly welded and fixed, or the corresponding overlapping portions of the adjacent splicing structures are directly and correspondingly spliced and fixed, and the like.

In the embodiment, the following discussion is performed by taking the fan-shaped structure 1 in which all the splicing structures 204 are in the same shape as an example:

as shown in fig. 1 to 6, in the present embodiment, the fan-shaped structures 1 are sequentially spliced with corresponding side edges to form a disc-shaped impeller 200.

In this embodiment, the side edges of the sector structures 1 are overlapped with the corresponding side edges of the adjacent sector structures 1, and the overlapped parts are fixedly connected through the connecting structure, so that the sector structures 1 are sequentially and fixedly connected end to form a disc-shaped impeller 200.

In this embodiment, two sides of the sector structure 1 are respectively formed by a first splicing portion 11 and a second splicing portion 12, and the first splicing portion 11 is a downward extending edge protruding outward from one side of the pulsator 200 close to the inner cylinder bottom 101 along the arc direction of the pulsator 200; the second splicing part 12 is an upper extending edge which protrudes outwards from one side of the impeller 200 far from the inner cylinder bottom 101 along the arc direction of the impeller 200, the upper extending edge and the lower extending edge are staggered in the thickness direction, the upper extending edge and the lower extending edge are coincident and corresponding in the rotation direction of the impeller, and one side of the upper extending edge close to the inner cylinder bottom 101 and one side of the lower extending edge far from the inner cylinder bottom 101 are positioned on the same horizontal plane.

In this embodiment, the first splicing part 11 of the fan-shaped structure 1 corresponds to the second splicing part 12 and the second splicing part 12 of the left adjacent fan-shaped structure 1 and the first splicing part 11 of the right adjacent fan-shaped structure 1, and they are overlapped and butted, and the overlapped and butted position is fixed via the connection structure.

In this embodiment, the first splicing portion 11 and the second splicing portion 12 are respectively provided with a plurality of bolt holes 21 arranged along the radial direction of the impeller; and the bolt holes 21 arranged on the first splicing part 11 and the second splicing part 12 are respectively arranged symmetrically with respect to the central axis of the fan-shaped structure 1 in one-to-one correspondence, so that the bolt sequentially passes through the first splicing part and the second splicing part which are spliced with each other and then is screwed and fixed by the nut, and the purpose of fixedly connecting the overlapped splicing parts of the two fan-shaped structures by the bolt is realized.

Example two

As shown in fig. 1 to 6, in the present embodiment, a pulsator structure according to the first embodiment is introduced, the pulsator 200 is formed by sequentially splicing a plurality of splicing structures 204, opposite sides of adjacent splicing structures 204 are overlapped and spliced, and the splicing positions are fixed by a connecting structure.

In this embodiment, the overlapped and spliced positions of the adjacent splicing structures 204 are on the same plane with the corresponding side surfaces of the splicing structure body at the two sides of the impeller 200, so that the two side surfaces of the impeller are both formed by smooth planes.

In this embodiment, the splicing side of the splicing structure 204 is provided with a splicing part with reduced thickness, and the corresponding splicing side of the adjacent splicing structure 204 is provided with a corresponding splicing part, so that the splicing part and the corresponding splicing part are correspondingly spliced and then combined to form a coincident splicing part with the same thickness as the impeller 200. In this embodiment, the splicing portion of the splicing structure 204 can be a protruding rib that is close to one side of the splicing structure or is arranged in the middle, and the corresponding splicing portion of the adjacent splicing structure 204 is a protruding rib or a groove that is correspondingly overlapped and correspondingly matched in the thickness direction, so that the splicing portion is spliced with the corresponding overlapping of the corresponding splicing portion, and an area that is equal to the thickness of the body of the splicing structure 204 and has no concavity and convexity on the surface is formed at the overlapping and splicing position.

In this embodiment, each of the splicing structures 204 is formed by a sheet-shaped structure with equal thickness, a first splicing part 11 is arranged at the splicing side of the sheet-shaped splicing structure 204, and the first splicing part 11 is a downward extending edge which protrudes outward from one side of the wave wheel 200 close to the inner cylinder bottom 101 and along the arc direction of the wave wheel 200; the corresponding splicing side of the adjacent splicing part 204 is provided with a second splicing part 12, the second splicing part 12 is an upward extending edge which protrudes outwards along the arc direction of the wave 200 from the side of the wave wheel 200 far away from the inner cylinder bottom 101, the upward extending edge and the downward extending edge are staggered in the thickness direction of the wave wheel 200 and correspondingly overlapped in the circumferential direction of the wave wheel 200, and the upward extending edge is close to one side of the inner cylinder bottom 101 and is far away from one side of the inner cylinder bottom 101 with the downward extending edge and is in the same horizontal plane, so that the two sides of the overlapping splicing part formed by the first splicing part 11 and the second splicing part 12 and the corresponding side faces of the splicing structures 204 on the two adjacent sides are in the same plane.

as shown in fig. 1 to 6, in this embodiment, the impeller 200 is formed by sequentially splicing a plurality of fan-shaped structures 1 that form a disc-shaped impeller, the left side and the right side of each fan-shaped structure 1 are respectively provided with a first splicing portion 11 and a second splicing portion 12, the first splicing portion 11 and the second splicing portion 12 of each fan-shaped structure 1 are respectively in corresponding overlapping butt joint with the second splicing portion 12 of the left adjacent fan-shaped structure 1 and the first splicing portion 11 of the right adjacent fan-shaped structure 1, and the overlapping butt joint is fixed through a connecting structure.

In this embodiment, the first splicing part 11 and the second splicing part 12 are respectively provided with a plurality of bolt holes 21 arranged along the radial direction of the impeller; and the bolt holes 21 arranged on the first splicing part 11 and the second splicing part 12 are respectively symmetrically arranged on the central axes of the opposite fan-shaped structures 1 in one-to-one correspondence, so that after the first splicing part and the second splicing part of the fan-shaped structures are respectively spliced correspondingly with the second splicing part and the first splicing part of the fan-shaped structures correspondingly connected with each other, the bolts sequentially penetrate through the first splicing part and the second splicing part of the two fan-shaped structures which are spliced mutually and then are screwed up and fixed through nuts, and the purpose of fixedly connecting the superposed splicing parts of the two fan-shaped structures through the bolts is realized.

EXAMPLE III

As shown in fig. 1 to 6, the present embodiment describes a pulsator structure, which includes a blade 201 for agitating laundry, and a connection portion 202 engaged with a pulsator shaft of a driving motor, wherein the connection portion 202 is fixedly connected to the blade 201, so that the blade 201 is driven to rotate by the driving motor through the connection portion 202.

The clothes stirring part of the impeller and the part connected with the motor shaft are respectively arranged into two mutually independent parts, so that parts connected with the impeller and different parts can be independently arranged and are made of materials with different rigidity, the weight of the impeller is reduced, and the strength is improved; meanwhile, parts of the impeller assembled with different parts are respectively set as independent components, so that the assembly efficiency of the impeller is improved, and the maintenance and replacement cost is reduced; more particularly, the multi-piece splicing structure can be preassembled through the same connecting part, so that the assembly speed and the assembly simplicity of the spliced impeller are improved.

As shown in fig. 1 to 6, in the present embodiment, the blade portion 201 is in a disk shape, the connecting portion 202 is coaxially and fixedly installed at one side of the blade portion 201, the connecting hole 20 extending along the axis of the pulsator 200 and penetrating through the connecting portion 202 is disposed at the center of the connecting portion 202, and the inner wall of the connecting hole 20 is provided with an internal spline engaged with the pulsator shaft.

In this embodiment, one side of the blade portion 201 is provided with an inwardly recessed mounting groove 9, the connecting portion 202 is correspondingly mounted in the mounting groove 9, the connecting portion 202 is in contact with the mounting groove 9, and the contact portion between the connecting portion 202 and the blade portion 201 is fixedly connected through at least one bolt.

In this embodiment, the inner wall of the mounting groove 9 is in contact with the outer periphery of the connecting portion 202.

In this embodiment, at least one positioning groove recessed into the groove is formed in the groove bottom of the mounting groove 9, a positioning rib protruding and extending towards the groove bottom is formed on the connecting portion 202, and the positioning rib is correspondingly inserted into the positioning groove to pre-position the relative mounting positions of the blade portion 201 and the connecting portion 202.

In this embodiment, the connection portion 202 is formed by a disc-shaped connection disc 10, a coaxially arranged connection sleeve 14 is installed at the center of the connection disc 10, and a connection hole 20 coaxially arranged with the connection disc is formed in the connection sleeve 14; preferably, the center of the connecting disc 10 is provided with a sleeve-shaped reinforcing rib 19 which is protruded and extended axially at two sides, and the connecting sleeve 14 is coaxially installed in the sleeve-shaped reinforcing rib 19.

In the embodiment, a circle of arc support ribs 13 protruding inwards the mounting groove is arranged in the middle of the connecting disc 10, a plurality of sections of radial support ribs 15 extending along the radial direction of the connecting disc 10 are arranged between the arc support ribs 13 and the connecting sleeve 14, each radial support rib 15 protrudes and extends towards the bottom of the mounting groove 9, and the extending ends of the arc support ribs 13 and the radial support ribs 15 are both positioned on the same plane and correspondingly contact with the bottom of the mounting groove 9; the peripheral wall of the arc support rib 13 is correspondingly attached and contacted with the inner wall surface of the side wall of the mounting groove 9.

In this embodiment, a circle of second arc support ribs 16 which are coaxially arranged and protrude and extend in the same side direction as the arc support ribs 13 are further arranged on the connection plate 10, the extending arc diameter of the second arc support ribs 16 is smaller than the extending arc diameter of the arc support ribs 13, and a screw column 17 is respectively arranged at the intersection of the second arc support ribs 16 and each radial support rib 15.

In this embodiment, the side surface of the connecting disc 10 between the arc support rib 13 and the outer peripheral edge of the connecting disc 10 is formed by a smooth annular surface 18, and the smooth annular surface 18 is correspondingly attached to the blade portion 201 on the outer periphery of the opening of the mounting groove 9. Preferably, at least one screw post 17 protruding and extending to one side of the blade 201 is arranged on the circular ring 18, a groove correspondingly matched with the screw post 17 is arranged on the blade 201, and the screw posts 17 on the circular ring 18 are correspondingly inserted into the corresponding grooves one by one.

Example four

In this embodiment, a pulsator structure is introduced, which combines a pulsator structure formed by splicing the multiple splicing structures described in the first and second embodiments with a pulsator structure in which the connecting parts and the blade parts are relatively independently arranged, and the specific structure is as follows:

as shown in fig. 1 to 6, in the present embodiment, there is described a pulsator structure, in which a pulsator 200 includes a blade portion 201 for agitating laundry, and a connection portion 202 engaged with a pulsator shaft of a driving motor, and the connection portion 202 is fixedly connected to the blade portion 201 to drive the blade portion to rotate through the connection portion under the action of the driving motor. The impeller structure's blade portion 201 is formed by the concatenation in proper order each other of the mosaic structure 204 of the mutual independent setting of multiple-disc, and the opposite side of adjacent mosaic structure 204 is mutual coincide concatenation, and the concatenation department is fixed mutually through connection structure. The splicing structures 204 of the impeller-structured blade portions 201 are all fixedly connected with the same connecting portion 202.

The impeller formed by the splicing structures is preassembled through a connecting disc, so that the assembly speed and the assembly simplicity of the spliced impeller are improved.

In the present embodiment, the following discussion is performed by taking the fan-shaped structure 1 in which the splicing structures 204 are all in the same shape as an example:

in this embodiment, the connection portion 202 is a connection disc 10 disposed at the center of the pulsator 200 and close to the inner cylinder bottom 101, and one side of the connection disc 10 is fixedly connected to the center of each sector structure 1; preferably, one side of the connecting disc 10 is in corresponding contact with the center of each fan-shaped structure 1, and the corresponding contact positions of the connecting disc 10 and the center of each fan-shaped structure 1 are connected through at least one bolt.

In this embodiment, the connecting disc 10 is connected with each sector-shaped structure 1 through at least one bolt, and the splicing overlapping portion of each adjacent sector-shaped structure 1 is connected with the connecting disc 10 through at least one bolt. Preferably, the overlapped splicing positions of the adjacent fan-shaped structures 1 are fixedly connected through at least one bolt, and the fan-shaped structures 1 are fixedly connected with the connecting disc 10 through at least one bolt; preferably, at least one bolt connected at the overlapped splicing position of each adjacent fan-shaped structure 1 is fixedly connected with the connecting disc 10, so that the at least one bolt sequentially penetrates through the two adjacent spliced fan-shaped structures and the connecting disc, and the two fan-shaped structures and the connecting disc are fixedly connected through the cover bolt.

EXAMPLE five

As shown in fig. 1 to 6, in the present embodiment, there is provided a pulsator structure, in which a pulsator 200 is in a disk shape, a circle of folded edges 2 bent to one side of the pulsator is disposed on an outer circumference of the disk-shaped pulsator 200, and the folded edges 2 extend in a direction parallel to a central axis of the pulsator 200.

In this embodiment, the extending end of the peripheral flange 2 of the pulsator 200 is provided with a circle of supporting flange 3 protruding radially outward along the pulsator 200, so that the pulsator is in spacing contact with the radially protruding supporting portion 4 on the wall of the inner drum 100 of the drum washing machine through the supporting flange 3, and further the supporting flange 3 and the supporting portion 4 which are in contact with each other are utilized to provide a limiting effect for the pulsator 200, and the axial vibration of the pulsator rotating in the inner drum is reduced.

In this embodiment, a circle of limiting ribs 6 protruding in the opposite direction to the extending direction of the support flange 3 is provided on the support flange 2, the extending shape of the limiting ribs 6 is a concentric circle coaxial with the center of the impeller 200, so that the limiting ribs 6 of the impeller 200 are correspondingly inserted into the limiting grooves 5 provided on the inner cylinder support portion 4, so as to realize the corresponding insertion of the impeller and the inner cylinder in the circumferential rotation direction, and prevent the impeller from generating displacement along the radial direction of the impeller.

In this embodiment, the pulsator 200 is provided with a plurality of water permeable holes penetrating the pulsator, and the water permeable holes communicate both sides of the pulsator 200, so that the washing water passes through the pulsator 200 and flows freely in the drum 100 of the drum washing machine through the water permeable holes after the pulsator 200 covers the cross section of the drum 100.

The embodiment also discloses a drum washing machine, the impeller structure is covered and installed at the bottom 101 of the inner drum, the periphery of the impeller 200 extends to the inner wall of the inner drum 100, the periphery of the impeller 200 is not contacted with the inner wall of the inner drum 100, the impeller 200 and the inner drum 100 are respectively connected with the driving motor of the washing machine through a clutch mechanism, so that the inner drum 100 and the impeller 200 can generate differential rotation to generate rubbing acting force to wash clothes.

In this embodiment, the folded edge 2 formed at the periphery of the pulsator 200 extends towards the opening of the inner tub 100, and a certain gap is formed between the folded edge 2 formed at the periphery of the pulsator 200 and the inner wall of the inner tub 100, so that the folded edge 2 formed at the periphery of the pulsator 200 extends in a protruding manner towards the side of the inner tub 100 where the laundry is placed, and the corresponding position of the folded edge 2 and the wall of the inner tub 100 is always located at the laundry-containing side of the inner tub 100, thereby achieving the purpose of providing rubbing washing force to the laundry by using the relative displacement between the folded edge 2 formed at the periphery of the pulsator 200 and the wall of the inner tub 100.

In this embodiment, a circle of supporting portion 4 protruding toward the center is disposed on the inner wall of the inner cylinder 100, and one side of the supporting portion 4 away from the inner cylinder bottom 101 is in corresponding limit contact with the outer periphery of the pulsator 200; preferably, the supporting part 4 is arranged at one side close to the inner cylinder bottom 101; more preferably, the supporting part 4 is ring-shaped, the outer circumferential wall of the ring-shaped supporting part 4 is fixedly connected with the inner wall of the inner cylinder 100, and one side of the ring-shaped supporting part 4 far away from the inner cylinder bottom 101 is in corresponding limit contact with the supporting flange 3 on the outer circumference of the wave wheel 200.

In this embodiment, a circle of limiting grooves 5 are formed in one side of the supporting portion 4, which is far away from the inner cylinder bottom 101, a limiting rib 6 protruding towards the inner cylinder bottom 101 is formed in one side of the periphery of the impeller 200, which is close to the inner cylinder bottom 101, and the limiting rib 6 is correspondingly inserted into the limiting grooves 5; preferably, a circle of supporting folded edge 3 which is bent outwards along the radial direction of the impeller 200 is arranged at the extending end of the peripheral folded edge of the impeller 200, one side of the supporting folded edge 3, which is close to the inner cylinder bottom 101, is in limited contact with the supporting part 4, and a limiting rib 6 which is correspondingly inserted into the limiting groove 5 is arranged on the supporting folded edge 3; preferably, after the limiting rib 6 on the supporting folding edge 3 is correspondingly inserted into the limiting groove 5, a certain gap is formed between the supporting folding edge 3 and the supporting part 4, so that the friction force in the rotation process of the impeller is reduced.

In this embodiment, in order to improve the relative acting force between the folded edges 2 and the wall of the inner drum 101 and increase the rubbing washing efficiency for the clothes, the folded edges 2 at the periphery of the impeller 200 may have a certain extension length in the direction parallel to the axis of the inner drum 100, so that the folded edges 2 formed at the periphery of the impeller 200 enclose a groove covering the lower part of the inner drum 100 and provided with an opening at the opening side of the inner drum 100, thereby achieving the purposes of providing a mixing drum in the inner drum and increasing the rubbing force for washing the clothes; preferably, the extension length of the peripheral flange 2 of the pulsator 200 is less than half of the axial length of the inner tub 100, so as to ensure that the rubbing position between the flange extension end of the pulsator and the inner tub wall is in the area where the clothes are distributed most, thereby improving the washing efficiency.

EXAMPLE six

As shown in fig. 1 to 6, in the present embodiment, a pulsator structure is described, in which a multi-stage concave-convex structure 203 is provided at an outer circumferential portion of a disc-shaped pulsator 200 to rub and wash laundry in a drum 100 by using a rotational force during rotation of the pulsator 200.

In this embodiment, the concave portions 8 and the convex portions 7 are sequentially and alternately arranged at the outer periphery of the disc-shaped pulsator 200 along the circumferential direction of the rotation of the pulsator 200, so as to maximize the rubbing efficiency of the pulsator on the laundry, and further improve the washing cleanliness of the drum washing machine; preferably, the concave portions 7 and the convex portions 8 extend in a radial direction of the disc-shaped pulsator 200.

In this embodiment, a circle of folds 2 bent to one side are disposed on the periphery of the disc-shaped impeller 200, and the folds 2 are provided with a height difference in the radial direction and/or the axial direction of the impeller 200, so that a concave-convex structure 203 is formed on the folds on the periphery of the impeller 200, and the concave-convex structure 203 disposed on the folds 2 on the periphery of the impeller 200 is used to rub the clothes during the rotation of the impeller 200, thereby further improving the rubbing force of the impeller on the clothes.

In this embodiment, the extending end of the flange 2 is formed in a wave shape having a concave-convex shape, so that a wave-shaped curved surface having a height difference in the axial direction of the pulsator is formed on the flange 2, and the wave-shaped curved surface constitutes a concave-convex structure 203 in the outer circumferential portion of the pulsator.

In this embodiment, a plurality of protruding portions protruding toward the center of the pulsator 200 are provided on the inner circumference of the hem 2 to form a concave-convex curved surface having a height difference in the radial direction of the pulsator on the hem 2, so that a concave-convex structure 203 having an action force for increasing washing and rubbing of laundry is formed on the inner circumferential side surface of the hem 2.

In the embodiment, the convex parts arranged on the folding edge 2 of the wave wheel and the convex parts 7 of the wave wheel 200 protruding to the folding edge 2 side are arranged in the same radial section of the wave wheel 200 in a one-to-one correspondence manner; preferably, the convex part 7 and the convex part in the same radial section are arranged in a penetrating way and communicated to form a convex bulge towards the clothes washing side, so as to further improve the rubbing washing efficiency of the impeller.

In this embodiment, the concave-convex structures 203 on the disk-shaped impeller 200 are arranged symmetrically with respect to the center of the impeller 200; preferably, the convex parts 7 arranged on the peripheral folded edge 2 of the impeller 200 are symmetrically arranged relative to the center of the impeller so as to ensure that the center of the impeller coincides with the center of gravity and reduce the vibration amplitude of the impeller in the rotating process.

EXAMPLE seven

As shown in fig. 1 to 6, the present embodiment describes a sector structure 1 for splicing a pulsator 200, which is applied to the above embodiments, wherein two side edges of the sector structure 1 extend along a straight line, and an outer peripheral side edge of the sector structure 1 extends along a circular arc line.

In this embodiment, the central portion and the peripheral portion of the fan-shaped structure 1 are planes at different heights, the central portion is disposed away from the inner bottom 101 of the drum washing machine relative to the peripheral portion, the middle portion of the fan-shaped structure 1 is a tapered transition surface, and two ends of the tapered transition surface are connected to the inner edge of the peripheral portion and the outer edge of the central portion respectively. Preferably, two ends of the middle portion of the fan-shaped structure 1 are respectively connected with the inner edge of the outer peripheral portion and the outer edge of the middle portion through arc transition surfaces. Therefore, the fan-shaped structures 1 are sequentially spliced to form the side parts of the disc-shaped impeller, and the center of each fan-shaped structure forms the groove bottom and the middle part of each fan-shaped structure forms the mounting groove 9 of the side wall of the groove.

In this embodiment, the two sides of the fan-shaped structure 1 are respectively the first splicing portion 11 and the second splicing portion 12, the first splicing portion 11 and the second splicing portion 12 of the fan-shaped structure 1 are respectively overlapped and butted with the second splicing portion 12 of the left adjacent fan-shaped structure 1 and the first splicing portion 11 of the right adjacent fan-shaped structure 1, and the overlapped and butted positions are fixed through the connecting structure.

In this embodiment, the first splicing portion 11 and the second splicing portion 12 are respectively provided with a plurality of bolt holes 21 arranged along the radial direction of the impeller; and the bolt holes 21 arranged on the first splicing part 11 and the second splicing part 12 are respectively symmetrically arranged on the central axes of the opposite fan-shaped structures 1 in one-to-one correspondence, so that after the first splicing part and the second splicing part of the fan-shaped structures are respectively spliced correspondingly with the second splicing part and the first splicing part of the fan-shaped structures correspondingly connected with each other, the bolts sequentially penetrate through the first splicing part and the second splicing part of the two fan-shaped structures which are spliced mutually and then are screwed up and fixed through nuts, and the purpose of fixedly connecting the superposed splicing parts of the two fan-shaped structures through the bolts is realized.

In this embodiment, the first splicing portion 11 and the second splicing portion 12 are formed by extending edges protruding outward along the arc direction of the impeller 200, the upper surface of the extending edge of the first splicing portion 11 and the lower surface of the extending edge of the second splicing portion 12 are three planes that sequentially descend along the radial direction of the impeller 200 and the direction of the outer periphery of the impeller 200, and each plane corresponds to the central portion, the middle portion and the outer periphery of the sector-shaped structure 1; at least one bolt hole 21 is respectively arranged on three planes of the first splicing part 11 and the second splicing part 12. Preferably, the outermost end of the extending edge of the first splicing part 11 is provided with a protruding rib protruding towards the side of the folded edge 1 of the impeller 200, and the protruding rib is provided with at least one bolt hole 21, so that the peripheral folded edges of two adjacent fan-shaped structures are connected and fixed through bolts.

Example eight

The present embodiment differs from the above embodiments in that: in this embodiment, each splicing structure forming the impeller may be in any shape, but all of them need to satisfy the following requirements: the splicing structures are spliced with each other to form a disc-shaped impeller structure.

Meanwhile, in this embodiment, each splicing structure constituting the pulsator may have the same shape, or may have at least two different shapes. When the impeller is formed by splicing at least two splicing structures with different shapes, the splicing structures with different shapes are spliced with each other in sequence, and can also be spliced to form a complete disc-shaped impeller.

Example nine

The present embodiment describes a drum washing machine, in which the pulsator according to any one of the first to eighth embodiments is installed in an inner tub of the drum washing machine, an outer periphery of the pulsator extends to an inner wall of the inner tub, and the outer periphery of the pulsator does not contact with the inner wall of the inner tub, and the pulsator and the inner tub are respectively connected to a driving motor of the washing machine through a clutch mechanism, so that the inner tub and the pulsator can rotate at a differential speed to generate a rubbing force to wash clothes.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims

1. An impeller for a drum washing machine, which is disc-shaped; the method is characterized in that: the periphery of the discoid impeller is provided with a multi-section concave-convex structure so as to rub and wash the clothes in the drum by using the rotating acting force;

concave parts and convex parts are alternately arranged on the periphery of the disc-shaped impeller along the rotating circumferential direction of the impeller; the concave parts and the convex parts extend along the radial direction of the disc-shaped impeller;

a circle of folded edges bent towards one side are arranged at the periphery of the disc-shaped impeller, and concave-convex structures with height difference in the radial direction and/or the axial direction of the impeller are arranged on the folded edges; the edge of the wave wheel is bent and extended towards one side of the inner cylinder mouth of the drum washing machine;

the inner circumference of the folded edge is provided with a plurality of sections of convex parts protruding towards the center direction of the wave wheel, and the inner circumferential wall of the folded edge forms a concave-convex structure with the radial height difference of the wave wheel;

the convex parts arranged on the edge folds of the wave wheel and the convex parts of the wave wheel protruding towards the edge folds are arranged in the same radial section of the wave wheel in a one-to-one correspondence way; the convex part and the convex part in the same radial section are arranged in a penetrating way.

2. The pulsator of claim 1, wherein: the extending end of the folded edge is in a wave shape which is arranged in a concave-convex mode, and the wave-shaped extending end face forms a concave-convex structure of the impeller axial height difference.

3. The pulsator of any one of claims 1 to 2, wherein: the concave-convex structures on the disk-shaped wave wheel are symmetrically arranged relative to the center of the wave wheel.

4. The pulsator of claim 3, wherein: the bulges arranged on the edge of the wave wheel are symmetrically arranged relative to the center of the wave wheel.

5. A drum washing machine is characterized in that: the impeller of any claim 1 to 4 is installed at the bottom of the inner drum in a covering manner, the outer periphery of the impeller extends to the inner wall of the inner drum, the outer periphery of the impeller is not contacted with the inner wall of the inner drum, the impeller and the inner drum are respectively connected with a driving motor of the washing machine through a clutch mechanism, so that the inner drum and the impeller can generate differential rotation to generate kneading acting force to wash clothes.

6. A drum washing machine according to claim 5, characterized in that: the wave wheel and the inner cylinder are coaxially arranged and correspondingly cover the bottom of the inner cylinder.