CN219692183U

CN219692183U - Powder metallurgy gear convenient to assembly

Info

Publication number: CN219692183U
Application number: CN202321069697.9U
Authority: CN
Inventors: 姚志强; 李作林; 杨礼国
Original assignee: Shaoxing Guoteng Auto Parts Co ltd
Current assignee: Shaoxing Guoteng Auto Parts Co ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-09-15
Anticipated expiration: 2033-05-06

Abstract

The utility model relates to the technical field of gears, and discloses a powder metallurgy gear convenient to assemble, which comprises a left half tooth and a right half tooth, wherein the left half tooth and the right half tooth are in clamping connection, a fixed ring is movably arranged in the left half tooth and the right half tooth, two symmetrically arranged connecting rods are fixedly arranged in the fixed ring, a mounting ring is fixedly arranged between the two connecting rods, and two symmetrically arranged threaded rods are connected with the outer wall threads of the fixed ring. This kind of powder metallurgy gear convenient to assembly can be with left half tooth and right half tooth and solid fixed ring composite connection through the threaded rod for a complete gear is constituteed jointly to left half tooth, right half tooth and solid fixed ring, and the gear after the user accessible collar will make up is installed on the gear shaft, and when tooth on left half tooth or the right half tooth is collapsed, the user can dismantle the back from solid fixed ring with left half tooth and right half tooth and change, need not to dismantle the collar from the gear shaft, can be used to simplify the change step when the gear is collapsed.

Description

Powder metallurgy gear convenient to assembly

Technical Field

The utility model relates to the technical field of gears, in particular to a powder metallurgy gear convenient to assemble.

Background

Powder metallurgy is a process technique for producing metal or metal powder (or a mixture of metal and non-metal powders) as a raw material, and by shaping and sintering, producing metallic materials, composites, and various types of articles. The gear is an important mechanical element for transmitting motion and power, the powder metallurgy gear is a powder metallurgy part commonly used in various automobiles and motorcycles, and the requirement of dimensional precision, in particular tooth form precision, can be completely met through one-step forming and finishing processes without other post-treatment processes. Therefore, compared with the traditional mechanical processing method, the material investment and the manufacturing are greatly reduced, and the material is a typical product which shows the characteristics of powder metallurgy.

The powder metallurgy gear is generally manufactured by designing a cylindrical die according to the size of a sample gear and producing the powder metallurgy gear under certain pressing pressure and sintering process conditions. However, the chamfer angle of the end part of the cylindrical die is generally 45 degrees, the greater the angle is, the more sharp the chamfer of the end part is, the more easily broken, the die cannot be used continuously, and the processing cost of the gear is increased.

In the prior art, patent number CN213655650U discloses a powder metallurgy gear, which comprises a gear body, a gear inner hole at the inner side of the gear body and gear teeth at the outer side of the gear body, wherein the end surfaces of the gear teeth do not protrude out of the end surfaces of the gear body, a first chamfer is arranged between the end surfaces of the gear body and the end surfaces of the gear teeth, the angle of the first chamfer is 35-55 degrees, and the distance between the first chamfer and the tooth root of the gear teeth is larger than 0.2mm; the gear inner hole is characterized in that the end face of the gear inner hole does not protrude out of the end face of the gear body, a second chamfer is arranged between the end face of the gear body and the end face of the gear inner hole, the angle of the second chamfer is 30 degrees, a platform is arranged between the second chamfer and the gear inner hole, and the width of the platform is larger than 0.2mm. The utility model improves the strength of the end part of the die, avoids the collapse of the die and reduces the processing cost of the gear on the basis of ensuring the normal function of the powder metallurgy gear.

This technical scheme is although can improve mould tip intensity, avoids the mould to collapse and damage, reduces gear processing cost, but, when above-mentioned technical scheme when using, after the tooth part of gear appears damaging, the user need dismantle the gear whole from the gear shaft and change, is interference connection usually with being connected between the gear and the gear shaft, consequently, installation and dismantlement process between gear and the gear shaft are comparatively troublesome.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the powder metallurgy gear which is convenient to assemble, so that the gear can be quickly replaced after being broken when in use.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a powder metallurgy gear convenient to assembly, including left half tooth and right half tooth, be the joint setting between left half tooth and the right half tooth, the inside movable mounting of left half tooth and right half tooth has solid fixed ring, gu fixed ring's inside fixed mounting has the connecting rod that two symmetries set up, gu fixed mounting has the collar between two connecting rods, gu fixed ring's outer wall threaded connection has the threaded rod that two symmetries set up, the terminal fixed mounting of threaded rod has the dog, the threaded hole has been seted up with threaded rod corresponding position run through on left half tooth and the right half tooth, the terminal and the threaded hole threaded connection of threaded rod.

Preferably, the outer walls of the two ends of the right half tooth are fixedly provided with clamping blocks, and the outer walls of the two ends of the left half tooth are penetrated and provided with clamping grooves matched with the clamping blocks.

Preferably, the outer wall of the fixing ring is in threaded connection with the inner walls of the left half tooth and the right half tooth.

Preferably, the outer wall of the fixing ring is in clamping connection with the inner walls of the left half tooth and the right half tooth.

Preferably, the outer wall of the stop block is provided with an inner hexagonal groove.

Preferably, a nut is connected to the outer wall of one end of the threaded rod, which is close to the mounting ring, in a threaded manner.

Compared with the prior art, the utility model has the following beneficial effects:

this kind of powder metallurgy gear convenient to assembly can be with left half tooth and right half tooth and solid fixed ring composite connection through the threaded rod for a complete gear is constituteed jointly to left half tooth, right half tooth and solid fixed ring, and the gear after the user accessible collar will make up is installed on the gear shaft, and when tooth on left half tooth or the right half tooth is collapsed, the user can dismantle the back from solid fixed ring with left half tooth and right half tooth and change, need not to dismantle the collar from the gear shaft, can be used to simplify the change step when the gear is collapsed.

Drawings

FIG. 1 is a schematic view of the overall structure of the main body of the present utility model;

FIG. 2 is a schematic view showing the split structure of the left half tooth and the right half tooth of the present utility model;

FIG. 3 is an enlarged schematic view of a portion of the utility model at A in FIG. 1;

fig. 4 is an enlarged partial schematic view of fig. 2B in accordance with the present utility model.

In the figure: 1. left half tooth; 2. right half tooth; 3. a fixing ring; 4. a mounting ring; 5. a connecting rod; 6. a threaded hole; 7. a threaded rod; 8. a stop block; 9. an inner hexagonal groove; 10. a clamping block; 11. a clamping groove; 12. and (3) a nut.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

The technical scheme of the utility model is further described below with reference to the attached drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., azimuth or positional relationship are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of operations, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1-4, a powder metallurgy gear convenient to assemble comprises a left half tooth 1 and a right half tooth 2, wherein the left half tooth 1 and the right half tooth 2 are in clamping connection, a fixing ring 3 is movably installed inside the left half tooth 1 and the right half tooth 2, two symmetrically arranged connecting rods 5 are fixedly installed inside the fixing ring 3, a mounting ring 4 is fixedly installed between the two connecting rods 5, threaded rods 7 are symmetrically arranged in threaded connection with the outer wall of the fixing ring 3, a stop block 8 is fixedly installed at the tail end of each threaded rod 7, threaded holes 6 are formed in positions, corresponding to the threaded rods 7, of the left half tooth 1 and the right half tooth 2 in a penetrating mode, and the tail end of each threaded rod 7 is in threaded connection with the threaded holes 6.

The main structure of the powder metallurgy gear convenient to assemble provided by the utility model is similar to that of a powder metallurgy gear disclosed in patent number CN213655650U, the inside of the left half tooth 1 and the inside of the right half tooth 2 are provided with annular structures protruding outwards, the width of the fixed ring 3 is matched with the width of the annular structures in the middle of the left half tooth 1 and the right half tooth 2, two symmetrically arranged threaded rods 7 are movably arranged on the annular outwards protruding structures in use, the protruding structures are more convenient for a user to connect the fixed ring 3 with the left half tooth 1 and the right half tooth 2 through the threaded rods 7, the gear can be installed with a gear shaft through the mounting ring 4 in an interference manner, when teeth of the gear are broken in the use process, the two threaded rods 7 on the fixed ring 3 are separated from threaded holes 6 on the left half tooth 1 and the right half tooth 2, so that the user can replace the two half teeth conveniently, and the disassembly and installation steps of the broken gear are simplified.

As shown in fig. 3, the outer walls at two ends of the right half tooth 2 are fixedly provided with a clamping block 10, the outer walls at two ends of the left half tooth 1 are penetrated and provided with a clamping groove 11 matched with the clamping block 10, the clamping block 10 is of an L-shaped structure, the clamping block 10 is correspondingly clamped in the clamping groove 11, the left half tooth 1 and the right half tooth 2 can be combined to form a whole, and the left half tooth and the right half tooth 2 are more convenient to be combined and installed with the fixing ring 3.

As shown in fig. 1, the outer wall of the fixed ring 3 is in threaded connection with the inner walls of the left half tooth 1 and the right half tooth 2, the fixed ring 3 can be further connected with the inner parts of the left half tooth 1 and the right half tooth 2 in a clamping manner, the fixed ring 3 can be connected with the left half tooth 1 and the right half tooth 2 in a threaded manner so that the whole structure is more stable, and when the fixed ring 3 is connected with the inner parts of the left half tooth 1 and the right half tooth 2 in a clamping manner, the left half tooth 1 and the right half tooth 2 are more convenient to detach from the fixed ring 3.

As shown in fig. 4, the outer wall of the stopper 8 is provided with an inner hexagonal groove 9, the inner hexagonal groove 9 is more convenient for fixing the threaded rod 7 correspondingly screwed into the threaded hole 6, and the special arrangement of the inner hexagonal groove 9 can prevent the tail end of the tool and the inner wall of the inner hexagonal groove 9 from slipping.

As shown in fig. 3, the outer wall of one end of the threaded rod 7, which is close to the mounting ring 4, is in threaded connection with a nut 12, and the nut 12 can enable the fixing ring 3 to be in extrusion connection with the left half tooth 1 and the right half tooth 2 more tightly under the action of the threaded rod 7.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A powder metallurgy gear convenient to assembly, its characterized in that: including left half tooth (1) and right half tooth (2), be joint setting between left half tooth (1) and right half tooth (2), inside movable mounting of left half tooth (1) and right half tooth (2) has solid fixed ring (3), the inside fixed mounting of solid fixed ring (3) has connecting rod (5) that two symmetries set up, solid fixed mounting has collar (4) between two connecting rods (5), the outer wall threaded connection of solid fixed ring (3) has threaded rod (7) that two symmetries set up, the terminal fixed mounting of threaded rod (7) has dog (8), threaded hole (6) have been seted up in corresponding position run through with threaded rod (7) on left half tooth (1) and right half tooth (2), the terminal and threaded hole (6) threaded connection of threaded rod (7).

2. A powder metallurgy gear according to claim 1, wherein the assembly is facilitated by: the outer walls of the two ends of the right half tooth (2) are fixedly provided with clamping blocks (10), and the outer walls of the two ends of the left half tooth (1) are provided with clamping grooves (11) which are matched with the clamping blocks (10).

3. A powder metallurgy gear according to claim 1, wherein the assembly is facilitated by: the outer wall of the fixed ring (3) is in threaded connection with the inner walls of the left half tooth (1) and the right half tooth (2).

4. A powder metallurgy gear according to claim 3 which is convenient to assemble, wherein: the outer wall of the fixed ring (3) is in clamping connection with the inner walls of the left half tooth (1) and the right half tooth (2).

5. A powder metallurgy gear according to claim 1, wherein the assembly is facilitated by: an inner hexagonal groove (9) is formed in the outer wall of the stop block (8).

6. A powder metallurgy gear according to claim 1, wherein the assembly is facilitated by: and a nut (12) is connected with the outer wall of one end of the threaded rod (7) close to the mounting ring (4) in a threaded manner.