CN101056031B

CN101056031B - Hub electric motor

Info

Publication number: CN101056031B
Application number: CN2007100963856A
Authority: CN
Inventors: 赖纳·法伊
Original assignee: SRAM Deutschland GmbH
Current assignee: SRAM Deutschland GmbH
Priority date: 2006-04-15
Filing date: 2007-04-16
Publication date: 2012-05-30
Anticipated expiration: 2027-04-16
Also published as: DE102006054979A1; NL2000589A1; NL2000589C2; NL2010634A; CN101056031A; NL2010634C2

Abstract

The invention relates to a hub motor, in particular to a generator device. The invention is provided with a rotor which rotates along with a hub sleeve, a stator which is arranged on a hub shaft and a current guide mechanism which opens into an output plug between the hub shaft and a bearing internal ring through a guide trough. The rotor is composed of a magnet base which contains magnet sheets. The stator consists of a coil frame which contains a coil and a core yoke, and a stator yoke. The core yoke is composed of a plurality of laminations which are uniformly arranged surrounding the shaft. The stator is composed of two internal stator sheets and two external stator sheets which are arranged on the end surface of the coil frame. The internal stator sheets are provided with long yoke arms which act on the coil from two sides; the ends of the long yoke arms are supported on an end plate. Furthermore, the invention is provided with a gap which is used for containing the end of the lamination group at the circumference. The end sides of the external stator sheets are pressed on the lamination group; the external stator sheets are provided with short yoke arms which are attached to the long yoke arms and locally cover the coil.

Description

Wheel hub motor

Technical field

The present invention relates to have the bicycle hub motor of rotor machine.

Background technology

Wheel hub motor early is exactly a prior art, and it is in principle by stator, rotor with from forming to outer electric current guide in the wheel hub.Stator is placed in fixed axle and upward and by yoke unshakable in one's determination, coil and stator yoke constitutes.Rotor be permanent-magnetic clamp and with the wheel hub sleeve sway.The electric current that in coil, is produced by rotary magnetic field perhaps axle and bearing inner ring between is transferred to the external world from coil through axle or along axle through electric wire.

Such wheel hub motor is open by patent documentation EP 0 591 724 B1 and EP 1 361 146 B1.

Shown wheel hub motor comprise separately one be arranged on the axle near a yoke unshakable in one's determination or a yoke stack of laminations unshakable in one's determination, coil to this be the insulation and wound core yoke stack of laminations.Stator yoke contacts yoke unshakable in one's determination or links to each other with yoke unshakable in one's determination, and spaced apart through small air gap and magnet ring.The electric current that in rotor machine, produces, perhaps outwards conducts through a hole in the axle through being transferred the outer defeated joint to an one pole below week in the hub bearing by cable.

The permanent magnet unit that wheel hub motor among EP 0 591 724 B1 discloses rotor or has been made up of single magnet, these single magnets are placed on the internal diameter of the pipe that is made up of magnetisable material, and the bearing cap of said pipe and both sides constitutes the wheel hub shell.Rotor relative stator yoke sways, and wherein stator yoke is made up of each two the stator yoke sheets that are placed in the coil both sides.The stator yoke sheet is equipped with the yoke arm of radial outward, and said yoke arm has two sweeps.The yoke arm of internal stator yoke sheet is shorter than the yoke arm of outer yoke sheet.The end of yoke arm and the coaxial extension of coil.Outside with internal stator yoke sheet on yoke arm end recline each other.The axially aligned end of yoke arm is arranged side by side and constitutes the side face of stator yoke each other, and wherein, the yoke arm end that is arranged on the opposed stator yoke sheet that is not close to is chimeric each other non-contiguously.Yoke unshakable in one's determination is made up of the sheet volume of multilayer, and sheet twists in and distolaterally is forced on the internal stator yoke sheet by the screw thread on the axle.

For guide current, end winding is grounded, and the other end is directed to the hole in the hub spindle, and is drawn outwardly by the contact pin of an insulation there.In order to receive on the lighting device on bicycle, a coaxial plug is inserted on the axle head.

Big spacing or space between coil and the rotor cause hub diameter unnecessarily to increase, and fixing yoke arm that the end is supported, one-sided does not allow between single magnet of axially extended end of yoke arm and rotor, to exist and obtains the required narrow air gap of high efficiency.

In EP 1 361 146 B1, a kind of wheel hub motor has been shown, it also has the stator yoke of surrounding coil, and stator yoke is made up of many radial oriented sheets and is constituted stack of laminations.Each sheet has interior axial component and outer axially part.The interior axial component of opposed stack of laminations constitutes yoke unshakable in one's determination jointly, and outer axially part constitutes the stator yoke arm.The length of exterior portions (except sheet outer in stack of laminations) is greater than coil width.Said end is positioned in the corresponding breach on each opposite side of bobbin.The radial component corner connection of stack of laminations is on yoke unshakable in one's determination and stator yoke arm, thereby opposed stator yoke arm is evenly distributed on the stator side face.

The electric current that is produced passes through cable from the nut that is used for fixing coil and yoke unshakable in one's determination always and passes to defeated joint outside the one pole that is positioned at outside the wheel hub in the bearing below week.

The combination of yoke unshakable in one's determination and stator yoke and integrated piece parts has brought the reliable advantage of semi-finished product manufacturing, but need have 28 stack of laminations that surpass 200 sheets in this scheme.This does not have help to reducing member with making, and causes high motor weight.

Of prior art, wheel hub motor is made up of simple mechanical part in principle and is installed between axle and the wheel hub sleeve.In addition, make every effort to obtain to try one's best high generating efficiency with lower member cost and manufacturing cost.High efficiency has only through using kicker magnet and accurate machining functions spare and keeping the small air gap between stator and the rotor to reach.In order to reach lower manufacturing cost, need will a limited number of simple members simple but reliable in function be assembled into the rotor machine of compactness.

Summary of the invention

Task of the present invention provides a kind of wheel hub motor of compact conformation; It is made up of a spot of simple member on the one hand; On the other hand; It has with said prior art compares better function, and this especially realizes through the bipolar outfit or the transmission of good contact between hard magnetization rotor, small air gap, stator yoke and the yoke unshakable in one's determination between rotor and the stator yoke and current of electric.

According to the characteristic of characteristic of the present invention, these are realized through following manner.

Rotor is equipped with the magnet sheet of hard magnetization, and these magnet sheets are calibrated on the edge of toroidal magnet seat vertically.

Stator is made up of coil, bobbin, yoke unshakable in one's determination and stator yoke.Coil is held by bobbin, and bobbin form fit ground rigid support is in the guide groove of hub spindle, and this guide groove also holds the termination of coil windings.In bobbin, the stack of laminations and the hub spindle of yoke unshakable in one's determination are arranged coaxially.In each coil sides an internal stator sheet and an external stator sheet are arranged, they be equipped with radially extend, at the crooked vertically yoke arm of all sides.The axial component of the yoke arm of internal stator sheet acts on the coil, and its end is positioned in the corresponding breach or yoke groove on the bobbin side face, and this has obtained the slightly inwardly support of bias voltage of axial yoke arm portion.The yoke arm of external stator sheet is placed in the top of internal stator sheet yoke arm and only covers the part of coil width.Rotation test shows, the braking moment the when inclination of the yoke arm portion of axial bending has obviously reduced slow the rotation.In order to improve the contact between stator piece and the yoke unshakable in one's determination, they are sandwiched in the corresponding breach of internal stator sheet and the external stator sheet is forced on the end face of yoke unshakable in one's determination under bias voltage.

Interior loop line end head and exterior loop line end head are passed in the slotted hole that radially extends in the bobbin end plate, get in the hub spindle guide groove through the yoke arm, and the below through ring in the hub bearing is drawn towards the external world therefrom.Be provided with the output plug around hub spindle on the bearing next door, it is made up of plug body, flat of plug and bayonet cap.Two winding wire terminations are passed the wire track that opening and contact in flat of the plug constitute connecting terminal respectively.

Except succinct structure, member rotor machine, that imagine, can simply make for function well allows to realize a kind of low cost but can obtain high efficiency wheel hub motor.

Description of drawings

Represent to be equipped with the embodiment of a wheel hub motor of rotor machine in conjunction with many accompanying drawings, be used to further specify inventive features, accompanying drawing is depicted as:

Fig. 1 is the 3-D view of wheel hub motor;

Fig. 2 is the sectional view of wheel hub motor;

Fig. 3 is the 3-D view of rotor;

Fig. 4 is the 3-D view of stator;

Fig. 5 is the 3-D view of bobbin;

Fig. 6 is the 3-D view of flat of plug;

Fig. 7 is the 3-D view that has the bobbin of yoke groove;

Fig. 8 is the 3-D view that has the internal stator sheet of segmentation yoke arm;

Fig. 9 is three views of yoke arm at the external stator sheet of all tilt.

Embodiment

Fig. 1 shows the wheel hub motor 1 that is in installment state.Wheel hub sleeve 2 with spoke flange rotates with hub spindle 3 coaxially.Bearing cap 4 is threaded together with wheel hub sleeve 2 and holds the bearing that is positioned on the hub spindle 3.The output plug 6 that is equipped with two output contacts 5 surrounds hub spindle 3, and output plug 6 links to each other with bearing cap 4 outside wheel hub and through the sealing moulding.

Fig. 2 representes the sectional view of wheel hub motor 1, and this wheel hub motor has wheel hub sleeve 2, hub spindle 3 and is integrated in the rotor machine in the wheel hub.

Rotor 7 rotates with wheel hub sleeve 2 and is made up of toroidal magnet seat that is fixedly connected with bearing cap 48 and the magnet sheet 9 that is fixed on the magnet holder internal diameter.

Stator 10 is by bobbin 11, constitute at this unshowned yoke unshakable in one's determination, coil 13, internal stator sheet 14 and external stator sheet 15, and they are arranged in the both sides of bobbin 11 and constitute stator yoke jointly.Bobbin 11 has the shape of rope drum, and it comprises two end plates 16 and a cylindrical part 32, the said cylindrical part of coil 13 coilings.Bobbin 11 be fixed on the hub spindle 3 and the moment of torsion form fit that will in machine operation, occur be supported in the guide groove 17.

The

stator piece

14,15 that is placed in bobbin 11 next doors in both sides clips coil 13 and constitutes stator yoke.In order to improve contacting of yoke unshakable in one's determination and

stator piece

14,15, external stator sheet 15 is by being forced on the yoke end face unshakable in one's determination in diameter difference level on the hub spindle 3 and screw thread.

Stator piece

14,15 is equipped with the yoke arm, and the yoke arm at first radially extends and be crooked vertically in all sides.The axial component of

yoke arm

18,19 is slightly inwardly pressed to end constriction and quilt.Internal stator sheet 14 has long yoke arm 19, and the axial bending of long yoke arm partly rides on the coil 13 and is supported on the end plate 16.External stator sheet 15 is equipped with short yoke arm 19, and the axial component of short yoke arm only covers the part of coil 13 and is attached on the long yoke arm 18.The axial component of long yoke arm 18 bends outwards when being connected with short yoke arm 19, thereby the end of long yoke arm 18 has the overall diameter that equals short yoke arm 19 ends.

In order to transmit the electric current that produces by rotor machine, two winding wire terminations 21 pass slotted hole in the end plate 16 get into the yoke arm 18 that radially extends, between 19, the guide groove 17 in the through hub spindle 3.In guide groove 17, winding wire termination 21 is directed to output plug 23 between hub spindle 3 and bearing inner ring 22.Output plug 23 is formed around hub spindle 3 and by plug body 24, flat 25 of plug and bayonet cap 26.Winding wire termination 21 is inserted on flat 25 of the plug through connecting hole and contacts corresponding wire track, and said wire track also constitutes output contact 5.Output plug 23 or plug body 24 constitute the insulated enclosure of wheel hub motors 1, and flat 25 of bayonet cap 26 sealing plug shells 24 or plug.

Fig. 3 shows the rotor 7 with toroidal magnet seat 8 and magnet sheet 9, and magnet holder is made up of iron-bearing materials.Magnet holder 8 has edge 27 inwardly, and this edge is used for axial alignment magnet sheet 9.The width of magnet holder 8 is greater than the length of magnet sheet 9, thereby stays the next inner surface that is not covered by magnet sheet 9 in a side of magnet holder 8.In this side, rotor 7 or magnet holder 8 are held by bearing cap.The installation (and especially adhere to) of magnet sheet 9 in magnet holder 8 on the one hand through the axial stop that constitutes by edge 27 and on the other hand since magnet sheet 9 obviously simplified because of the fact of its magnetic force sticking on iron content magnet holder 8.Fact proved that advantageously magnet sheet 9 is not to paste each other, but come the mutual alignment and the distance of regulation magnet sheet 9 through a magnet cage 41.Magnet cage 41 is processed by nonmagnetic substance, preferably is made of plastics.

Fig. 4 representes bearing cap 4 and stator 10, and stator has the anti-bobbin 11 on the hub spindle 3 that is installed in rotationally.Bobbin 11 has the moving plate of taking and thereby anti-being supported on rotationally in the guide groove 17.The cylindrical part of coil 13 coiling bobbins 11 and support by end plate in both sides.On the side face of two end plates, be provided with wide breach 28 and narrow breach 29.Long yoke arm 18 stretches in the darker wide breach 28 with short yoke arm 19, by the end portion, supports of the long yoke arm 18 of bias voltage slightly inwardly in narrow breach 29.Thus one, guaranteed the accurate location and the guiding of yoke arm 18,19.In addition, realized the maintenance of the narrow air gap between stator 10 and the rotor, this produces very active influence to electric efficiency.

In the cylindrical part of bobbin 11, near axle and along the axle direction with uniform distances yoke 12 unshakable in one's determination is being set.Yoke 12 unshakable in one's determination is made up of the stack of laminations with rectangular sheet.The end face of yoke 12 unshakable in one's determination exceeds bobbin 11 and passes the breach 20 of internal stator sheet 14 in both sides.Under installment state, the edge of breach 20 firmly encases yoke 12 unshakable in one's determination on distolateral periphery, so that between yoke 12 unshakable in one's determination and breach 20 edges, form closely contact.External stator sheet 15 is crushed on the end face of yoke 12 unshakable in one's determination by screw thread on the hub spindle 3 and diameter difference level.Stator yoke and especially

stator piece

14,15 also help to raise the efficiency with tight contact of yoke 12 unshakable in one's determination.

Stator yoke is made up of the stator piece that is arranged in bobbin 11 both sides 14,15.The long yoke arm 18 of two internal stator sheets 14 is inserted in respectively in the gap of the opposed long yoke arm 18 on the stator side face.Short yoke arm 19 surrounds the part of long yoke arm 18 or is close to it.The

yoke arm

18 and 19 the part that extends axially receive to oppress slightly to the end constriction and towards coil 13.

Stator piece

14,15 is furnished with mesopore 30, and its position is corresponding to the centering projection 31 on the bobbin 11.This measure also helps accurate calibration function spare, and then helps to raise the efficiency and simplify installation.

In on the end plate of bobbin 11, being provided with slotted hole with outside slotted hole 37, be used to pass the winding wire termination.The interior diameter of the through coil 13 of interior slotted hole, outer slotted hole 37 arrives the overall diameter of coil 13 at least.

Fig. 5 representes bobbin 11, and it comprises the side end panel 16 of cylindrical part 32 and support coils winding.On the side face of end plate 16, be provided with narrow breach 29 and be used to hold and support long yoke arm end, also be provided with wide breach 28 and be used to guide long yoke arm and short yoke arm.On cylindrical part 32, be provided with axially extended depression 33 and be used to hold yoke unshakable in one's determination, and be provided with axially outstanding fixed projection 31 and be used to locate stator piece.Take moving plate 35 and charge in the axle opening 34 at center, the said moving plate anti-support coils frame 11 rotationally in the hub spindle guide groove of taking.On at least one end plate, be provided with two slotted

holes

36,37 and be used to make the winding wire termination to pass.One of them slotted hole another slotted hole relatively radially staggers, and wherein, the head of winding wire stretches in the bobbin 11 through the interior slotted hole 36 of through cylindrical part 32, and the outer slotted hole 37 of direct line circle overall diameter is directed to the external world and the end of winding wire passes at least.

Flat 25 of the plug that has accommodation section 38 and output contact 5 has been shown in Fig. 6.When output plug connected, connecting hole 39 and welded together with two wire tracks 40 was passed in the winding wire termination.These two wire tracks 40 also constitute the output contact 5 of output plug 6.Plug body and bayonet cap surround plug under installment state flat 25 and flat of plug of protection do not made dirty with rotor machine and spattered Shang Shui.

Fig. 7 representes bobbin 11, and it has the central cylindrical part 32 and side end panel 16 of holding coil.At the end plate periphery, be provided with the wide breach 28 that is used to guide long yoke arm and short yoke arm.Between wide breach 28, be provided with yoke groove 42.These yoke grooves 42 hold the end of long yoke arm, prevent that thus the axially extended yoke arm of thin stator piece from also perhaps being nuzzled up by the pulling of the magnet of rotor there.Yoke arm end fixedly making in yoke groove 42 becomes unnecessary in other reinforcement measure on the stator periphery (for example periphery is tightened or axially extended yoke arm is bonded on the coil side face).

Fig. 8 representes internal stator sheet 14, and it has crooked long yoke arm 18.The long yoke arm 18 of two internal stator sheets 14 inserts between the gap of opposed long yoke arm 18 respectively and the tensioning stator.Yoke arm 18 extend axially part to the end constriction and have step 43.The short yoke arm of external stator sheet surrounds or is close to first subregion of long yoke arm 18 under installment state.Second subregion of long yoke arm 18 constitutes an outwards directed step 43, and the overall diameter of step is corresponding to the overall diameter of outer yoke sheet.The 3rd subregion on the long yoke arm end after step 43 flexes inward into a less diameter again.Short yoke arm and the step on the long yoke arm 18 of opposed stator piece 43 constitute the stator side face, and very near from the magnet that is aligned inwards of rotor.Air gap between this spacing and stator and the rotor should be as far as possible little, to reach high electric efficiency.But this only just can accomplish under the situation that the settling position that extends axially the yoke arm is perhaps fixed.For prevent relative thin and long yoke arm 18 that almost be pointed extension not by rotor magnetic crooked or even nuzzle up, the end moves in the groove of bobbin end plate and remains there.Need make long yoke arm 18 ends inwardly curved after step 43 zones for this reason.The overall diameter that is made up of the crooked end of long yoke arm 18 is less than the overall diameter of bobbin end plate, but with to constitute overall diameter by groove consistent.Accurate pointing that the yoke groove on the bobbin realized the yoke arm is introduced with stable in the yoke arm end of bending, thereby help to install and simplify and efficient improves.

Fig. 9 representes external stator sheet 15, and it has the short yoke arm 19 in the periphery inclination.The braking moment that when motor slowly rotates, occurs is considered to disturb.Test shows, tilts towards perimeter sides through the yoke arm portion that makes axial bending, the braking moment when obviously having reduced slow the rotation.Short yoke arm 19 dwindle towards the end extend axially part is equipped with outside aligning in both sides chamfered edge 44 or rounding.

The Reference numeral list

The 1-wheel hub motor; 2-takes turns hub sleeve; The 3-hub spindle; The 4-bearing cap; The 5-output contact; The 6-output plug; The 7-rotor; The 8-magnet holder; 9-magnet sheet; The 10-stator; The 11-bobbin; 12-yoke unshakable in one's determination; The 13-coil; 14-internal stator sheet; 15-external stator sheet; The 16-end plate; The 17-guide groove; The long yoke arm of 18-; The short yoke arm of 19-; The 20-breach; 21-winding wire termination; The 22-bearing inner ring; The 23-output plug; The 24-plug body; Flat of 25-plug; The 26-bayonet cap; The 27-edge; The wide breach of 28-; The narrow breach of 29-; The 30-fixing hole; 31-centering projection; The 32-cylindrical part; The 33-depression; The axle opening at 34-center; 35-takes moving plate; Slotted hole in the 36-; The outer slotted hole of 37-; 38-axle accommodation section; The 39-connecting hole; The 40-wire track; 41-magnet cage; 42-yoke groove; The 43-step; The 44-chamfered edge.

Claims

1. a wheel hub motor (1); This wheel hub motor has the rotor machine between the wheel hub sleeve (2) that is positioned at fixed hub spindle (3) and rotates; Wherein, Said rotor machine is by stator (10), take turns magnet rotor (7) and the electric current guide from coil (13) to hub outside surface that hub sleeve (2) rotates and forms with said, and said stator (10) and said hub spindle (3) resist and be rotatedly connected and have the bobbin (11) that holds yoke unshakable in one's determination (12), said coil (13) and stator piece (14,15); It is characterized in that; Said yoke unshakable in one's determination (12) is held by said bobbin (11) and exceeds said bobbin (11) in both sides, on the end face of said bobbin (11), respectively is provided with an internal stator sheet (14) and an external stator sheet (15), wherein; The end of said yoke unshakable in one's determination (12) abuts at the edge of the corresponding breach (20) on the said internal stator sheet (14) on the side face of outstanding yoke unshakable in one's determination end at the said external stator sheet of distolateral contact (15).

2. wheel hub motor according to claim 1 (1); It is characterized in that; Said external stator sheet (15) is forced on the end face of said yoke unshakable in one's determination (12) to improve contact; On a side of said hub spindle (3), be provided with backstop or diameter difference level for this reason, and on the opposite side of said hub spindle, be provided with the adjustment screw thread.

3. wheel hub motor according to claim 2 (1); It is characterized in that; Said yoke unshakable in one's determination (12) is made up of the stack of laminations that comprises many overlapping rectangular sheets, and said yoke unshakable in one's determination is with paraxial being arranged in the said bobbin (11) of mode around said hub spindle (3) uniformly dispersing.

4. wheel hub motor according to claim 1 (1); It is characterized in that; In order to form said stator yoke; Said bobbin (11) is surrounded from both sides by said internal stator sheet (14) and said external stator sheet (15); Said stator piece is equipped with distolateral and radially extends and at the long yoke arm (18) of side face axial bending with lack yoke arm (19); Wherein, the said long yoke arm (18) of said internal stator sheet (14) point to opposed internal stator sheet (14) the yoke arm the gap and cross coil (13) and arrive opposed end plate (16), the part of coil width is gone up and only covered to the said long yoke arm (18) that the said short yoke arm (19) of said external stator sheet (15) covers on said internal stator sheet (14).

5. wheel hub motor according to claim 4 (1) is characterized in that, the part that extends axially of said short yoke arm (19) is equipped with chamfered edge (44) or the rounding towards the side face of said internal stator sheet (14).

6. wheel hub motor according to claim 4 (1) is characterized in that, said stator piece (14,15) respectively have the hole that is used to hold axle and have at least one corresponding centering projection (31) that is used for accurately being positioned at said bobbin (11) to mesopore (30).

7. wheel hub motor according to claim 4 (1); It is characterized in that; Under installment state; The said long yoke arm (18) of said internal stator sheet (14) extend axially that part abuts on the appropriate section of said short yoke arm (19) of said external stator sheet (15) from the inboard and outwardly-bent during continuing to extend axially, thereby said long yoke arm portion has the identical overall diameter of short yoke arm portion with said external stator sheet (15).

8. wheel hub motor according to claim 7 (1); It is characterized in that; The part that extends axially of said long yoke arm (18) has three subregions; First subregion wherein is attached on the corresponding short yoke arm (19) internally; Second subregion constitutes the step (43) of outside and its overall diameter corresponding to the overall diameter of short yoke arm (19), and the 3rd subregion curves inwardly, thereby the overall diameter that is made up of the end of long yoke arm (18) is less than the overall diameter of the end plate (16) on the bobbin (11) and equal the overall diameter by yoke groove (42) formation.

9. wheel hub motor according to claim 4 (1); It is characterized in that; Yoke arm (18; 19) extend axially part under installment state by slightly inside bias voltage, thereby the end portion, supports of long yoke arm (18) on the side face of bobbin (11), the short yoke arm (19) of external stator sheet (15) be supported on long yoke arm (18) extending axially partly on.

10. wheel hub motor according to claim 4 (1) is characterized in that, yoke arm (18,19) extend axially the part after bending always towards the free end constriction.

11. wheel hub motor according to claim 4 (1); It is characterized in that; Said bobbin (11) has central cylindrical part (32) and has end plate (16) in both sides in order to hold coil; The narrow breach (29) that said end plate is provided with the wide breach (28) that is used for guide yoke arm (18,19) and is provided with the end that is used to support long yoke arm (18) in all sides.

12. wheel hub motor according to claim 4 (1); It is characterized in that; Bobbin (11) has central cylindrical part (32) and has end plate (16) in both sides in order to hold coil; Said end plate is provided with wide breach (28) that is used for guide yoke arm (18,19) and the yoke groove (42) that is provided with the end that is used for fixing long yoke arm (18) in all sides.

13. wheel hub motor according to claim 4 (1); It is characterized in that; In bobbin (11), be provided with the axle opening (34) at a center that is used to hold hub spindle (3) and be provided with one and take moving plate (35), saidly take the torque support that moving plate is charged into the axle opening (34) at said center and realized the form fit of bobbin (11) on hub spindle (3).

14. wheel hub motor according to claim 4 (1); It is characterized in that; On bobbin (11); The depression (33) that extends axially that is used to hold yoke unshakable in one's determination (12) evenly arranges around the axle opening (34) at center, and the fixed projection (31) that embeds corresponding fixing hole (30) for accurately location and fixed stator sheet (14,15) exceeds the outline of bobbin (11) in both sides.

15. wheel hub motor according to claim 4 (1); It is characterized in that; On at least one end plate (16), be provided with two slotted holes (36,37) that radially extend and be used for lead-out wire astragal termination (21); The overall diameter that wherein outer slotted hole (37) leads to coil (13), the interior diameter that interior slotted hole (37) leads to coil (13).

16. wheel hub motor according to claim 1 (1) is characterized in that, said magnet rotor (7) is made up of toroidal magnet seat (8) and built-in magnet sheet (9), and wherein said magnet sheet (9) is shorter than magnet holder (8).

17. wheel hub motor according to claim 16 (1); It is characterized in that; Magnet holder (8) is held rotationally and is had an edge (27) that points to inwardly at opposite side by bearing cap (4) is anti-in a side, and said magnet sheet (9) is attached on the said edge and aims at vertically.

18. wheel hub motor according to claim 16 (1) is characterized in that, said toroidal magnet seat (8) is made up of iron-bearing materials, fixing when being installed in the magnet holder (8) to be reduced at magnet sheet (9).

19. wheel hub motor according to claim 16 (1); It is characterized in that; Said magnet sheet (9) is held by magnet cage (41); Said magnet cage is made up of nonmagnetic substance, and said magnet cage confirm magnet sheet (9) the mutual alignment, be used to axially align or be used for and edge (27) keep uniform distance.

20. wheel hub motor according to claim 1 (1); It is characterized in that; The center axial region of said hub spindle (3) is equipped with guide groove (17); Moving plate (35) the form fit ground taken that is used to guarantee the assigned position of said bobbin (11) and is used to insert said guide groove (17) supports stator force square or said bobbin (11), and is used for guide line astragal termination (21) through between bearing inner ring (22) and the said hub spindle (3) and arrival output plug (6).

21. wheel hub motor according to claim 20 (1); It is characterized in that; Winding wire termination (21) is through corresponding slotted hole (36,37) at least one end plate (16) of said bobbin (11) and walk around the yoke arm (18,19) that radially extends and be introduced into the said guide groove (17) of said hub spindle (3); Then be directed to the said output plug (6) or flat of the plug (25) that surround said hub spindle (3) always, and be connected the there.

22. wheel hub motor according to claim 1 (1); It is characterized in that; On hub outside surface or on bearing cap (4) next door, be provided with the output plug (6) at sealed bearing position, said output plug is made up of the plug body (24) that surrounds said hub spindle (3), the plug flat (25) and the bayonet cap (26) of sealing plug shell (24) that constitute the plug element of guide current.

23. wheel hub motor according to claim 22 (1); It is characterized in that; Said plug flat (25) is furnished with an accommodation section (38) and is used to make said hub spindle (3) to pass; Be furnished with connecting hole (39) and be used for introducing and connecting two winding wire terminations (21), and be furnished with two wire tracks (40) that also constitute output contact (5).