CN209725113U

CN209725113U - Electric drive

Info

Publication number: CN209725113U
Application number: CN201920205971.8U
Authority: CN
Inventors: 左大平
Original assignee: Bosch Automotive Products Changsha Co Ltd
Current assignee: Bosch Automotive Products Changsha Co Ltd
Priority date: 2019-02-18
Filing date: 2019-02-18
Publication date: 2019-12-03
Anticipated expiration: 2029-02-18

Abstract

This application involves electric drives.Including at least two axle sleeves, each axle sleeve has outer peripheral surface and inner hole, and outer peripheral surface is the surface of revolution using axial line as conducting wire, and pivot limitation is installed in relative rotation in the inner hole of at least two axle sleeves, has the eccentricity greater than zero between axial line and axis.Ring gear is fixed relative to shell, and each planetary gear is installed on the outer peripheral surface of an axle sleeve, and multiple internal tooths are arranged in ring gear, and several external tooths, external tooth and interior tooth engagement is arranged in planetary gear periphery.This electric drive structure is simple, easy to manufacture.

Description

Electric drive

Technical field

This application involves electric drives, more particularly to the electric drive with planetary transmission.

Background technique

In the electric drive using small differential teeth planetary gear train composition speed changer, install eccentric shafts on the pivot of armature Set, two planetary gears are installed on axle sleeve.However, the gear ring of planetary gear train is first mounted on the shell of armature, surrounding and top Closing forms a upper opening of blind hole.This technical solution, axle sleeve structure is complicated and manufacturing cost is high, speed changer installation Difficulty, and do not allow quick detachable.

Therefore, it is necessary to which improved technology scheme is to overcome existing technical problem.

Utility model content

The application technical problem underlying to be solved is the difficult technical problem of existing electric drive manufacture.

In order to solve the above technical problems, providing electric drive in some embodiments comprising:

Armature comprising shell and the pivot that can be rotated about the axis relative to the shell；

At least two axle sleeves, each axle sleeve have outer peripheral surface and inner hole, and the outer peripheral surface is using axial line as conducting wire The surface of revolution, pivot limitation is installed in relative rotation in the inner hole of at least two axle sleeve, the axial line and institute State the eccentricity having between axis greater than zero；

Ring gear is fixed relative to the shell, and multiple internal tooths are arranged in the inner circumferential of the ring gear；And

At least two planetary gears, each planetary gear are installed on the outer peripheral surface of an axle sleeve, the planetary gear Several external tooths, the external tooth and the interior tooth engagement is arranged in periphery.

According to the technical solution of the application, each planetary gear is installed on the outer peripheral surface of an axle sleeve, and each planetary gear can To be combined installation and disassembly with an axle sleeve respectively, installation is combined with axle sleeve without whole planetary gears and is torn open It unloads, substantially reduces the difficulty of assembling and maintenance.And the structure of axle sleeve is simple, and it is easy to manufacture, it is at low cost.

Detailed description of the invention

The specific embodiment of the application is described in detail below in conjunction with attached drawing, in which:

Fig. 1 shows a kind of decomposition diagram of the electric drive of specific embodiment；

Fig. 2 shows that two axle sleeves of electric drive shown in Fig. 1 and the part at the pivot position of armature are put from another angle Big schematic diagram；

Fig. 3 shows the partial enlargement diagram that electric drive shown in Fig. 1 is splitted along axial direction in the assembled state；And

Fig. 4 shows schematic diagram of the electric drive shown in Fig. 3 from left sides.

Specific embodiment

It include armature 1 according to a kind of electric drive 100 of specific embodiment of the application shown in please referring to Fig.1 to Fig.4, Armature 1 includes shell 10 and the pivot 12 that can be rotated relative to shell 10 around axis AX.Multiple internal tooths are arranged in the inner circumferential of ring gear 30 302, ring gear 30 includes axially opposing first end 306 and second end 308.First end 306 is used for ring gear 30 relative to shell 10 is fixed.As shown in the figure, end plate is arranged in first end 306, and three through-holes 307, the position of corresponding through-hole 207 are arranged on the end plate It sets and three screw holes (screw hole, which may be set to be, is fixed on the nut of shell 10) 17 is set in 10 end of shell of armature 1, with three A screw 34 is screwed into each screw hole 17 by three through-holes 307 respectively, so that ring gear 30 is fixed on shell 10.It can also hold Location hole 304 is arranged in the centre of plate, is correspondingly arranged locating piece 14 in the axial end portion of shell 10, and pivot 12 is from locating piece 14 intermediate stretching.When installing ring gear 30, by 304 sets of location hole on locating piece 14, to keep ring gear 30 and 12 liang of pivot Concentricity between person.

30 second end 308 of ring gear is provided with opening.In the case where first end 306 is fixed on armature 1, all parts can be with It is installed in ring gear 30 by the opening of second end 308.For example, can successively install first axle sleeve, 2, first bearings 24, First 2, second, axle sleeve bearing of planetary gear 32, second, 24, second planetary gears 32, pin wheel bearing 7, pin wheel 5 and end cap 6.It, as an example with two planetary gears 32, can be in other some specific embodiments in the specific embodiment of diagram More planetary gears 32 are installed.

Two axle sleeves 2 are respectively arranged on pivot 12.The geomery of two axle sleeves 2 is identical.Each axle sleeve 2 has periphery Face 20 and inner hole 22.Outer peripheral surface 20 is using axial line BX as the surface of revolution of conducting wire.Pivot 12 and the mutually matched part of inner hole 22 For symmetrically arranged non-revolved body shape, pivot 12 is the cylinder that opposite sides is plane.Opposite two medial surfaces of inner hole 22 It is correspondingly plane.Pivot 12 is installed in the inner hole 22 of axle sleeve 2, is limited by the non-revolved body shape of mutually matched part It is relatively unrotatable between the two.There is the eccentric distance e greater than zero between axial line BX and axis AX.Inner hole 22 is perpendicular to axis Shape on the section of heart line BX axisymmetricly, therefore pivot 12 can be in two different orientation of 180 degree each other from inner hole 22 Installation.One of them of two opposite axle sleeves 2 is installed on pivot 12 according to first orientation, another is installed according to second orientation In pivot 12.First orientation differs mutually 180 degree with the direction of the axle sleeve 2 of second orientation.Therefore, the axial line of two axle sleeves 2 BX is respectively towards different direction off-axis AX.As shown in Figure 3, identical two axle sleeves 2 of eccentric distance e are in two opposite sides It mutually staggers upwards, the geomery of two planetary gears 32 is identical, two 32 energy of planetary gear of the eccentric operating of such arrangement Realization mutually balances each other, and is conducive to reduce vibration.In the specific embodiment of more than two planetary gear 32, axle sleeve 2 can be set The multiple faces identical with the quantity of planetary gear 32 of inner hole 22 hole, and pivot 12 is arranged to match with the inner hole 22 The cylinder body shape in multiple faces so as to which axle sleeve 2 to be installed on pivot 12 in multiple orientation, and multiple planetary gears 32 is divided It is not installed on axle sleeve 2, multiple planetary gears 32 are still able to achieve mutual balance, reduce vibration.

Each planetary gear 32 is installed on the outer peripheral surface 20 of an axle sleeve 2, between the outer peripheral surface 20 of planetary gear 32 and axle sleeve 2 Roller bearing 24 is installed.Several external tooths 322 are arranged in 32 periphery of planetary gear, and external tooth 322 is engaged with internal tooth 302.The number of teeth of ring gear 30 And the difference of the number of teeth of planetary gear 32 is not more than 4, and the planetary gear speed reducer of this few teeth difference is realized biggish with lesser volume Transmission ratio.Since each planetary gear 32 is combined installation and disassembly with an axle sleeve 2 respectively, without such as traditional technology one Whole planetary gear and an axle sleeve are combined installation and disassembly by sample, substantially reduce the difficulty of assembling and maintenance.And it is every The structure of a axle sleeve is simple, easy to manufacture, therefore overall cost is low.

Multiple pin shafts 52 are set on pin wheel 5, and multiple 52 off-axis AX of pin shaft are dispersedly arranged.Each planetary gear 32 is arranged Multiple pin holes 320, each pin shaft 52 are inserted into a pin hole 320 of each planetary gear 32.Pin shaft 52 and 320 clearance fit of pin hole, The sum of radius and eccentric distance e of pin shaft 52 are less than the radius of pin hole 320.Pin wheel 5 also sets up inner seat 58, inner seat 58 and pivot 12 it Between mounting pin wheel bearing 7.The hole cooperated in pin wheel bearing 7 with pivot 12 is also non-rotating shape, limits opposite turn from each other It is dynamic.End cap 6 is fixed on the opening of second end 308, and 6 periphery of end cap is arranged four limited blocks 62, limited block 62 with it is right on ring gear 30 The slot of position is answered to cooperate and limit the relative position between end cap 6 and ring gear 30, especially between restriction end cap 6 and ring gear 30 It relatively rotates.Axle bed 60 is arranged in end cap 6, and output shaft 50 is arranged in pin wheel 5, and output shaft 50 is installed in axle bed 60.Output shaft 50 is set The connecting hole 54 with multiple internal tooths is set, connecting hole 54 can be limited with external component and mutually rotationally be connect, thus by electric drive The power transmission of device 100 gives the external component for needing power.

Although having described above, the scope of patent protection of the application should be defined by the claims.

Claims

1. electric drive (100), characterized in that it comprises:

Armature (1) comprising shell (10) and the pivot (12) that can be rotated relative to the shell (10) around axis (AX)；

At least two axle sleeves (2), each axle sleeve (2) have outer peripheral surface (20) and inner hole (22), and the outer peripheral surface (20) is It take axial line (BX) as the surface of revolution of conducting wire, pivot (12) limitation is installed at least two axle sleeve in relative rotation (2) there is the eccentricity (e) greater than zero in inner hole (22), between the axial line (BX) and the axis (AX)；

Ring gear (30), fixed relative to the shell (10), multiple internal tooths (302) are arranged in the inner circumferential of the ring gear (30)；And

At least two planetary gears (32), each planetary gear (32) are installed on the outer peripheral surface (20) of an axle sleeve (2), Several external tooths (322) are arranged in planetary gear (32) periphery, and the external tooth (322) is engaged with the internal tooth (302).

2. electric drive (100) according to claim 1, wherein the number of teeth of the ring gear (30) and the planetary gear (32) difference of the number of teeth is not more than 4, and the ring gear (30) includes axially opposing first end (306) and second end (308), described Second end (308) has opening, in the case where the first end (306) is fixed on the armature (1), the planetary gear (32) It can be installed on the axle sleeve (2) by the opening.

3. electric drive (100) according to claim 1, wherein the pivot (12) and the inner hole (22) phase interworking The part of conjunction is symmetrically arranged non-revolved body shape, and the pivot (12) can be different at least two from the inner hole (22) Orientation installation.

4. electric drive (100) according to claim 1, wherein the periphery of the planetary gear (32) and the axle sleeve (2) Roller bearing (24) are installed between face (20).

5. electric drive (100) according to claim 1, wherein the axial line (BX) of at least two axle sleeve (2) point The axis (AX) is not deviateed towards different directions.

6. electric drive (100) according to claim 1, wherein the geomery phase of at least two axle sleeve (2) Together, shape of the inner hole (22) on the section perpendicular to the axial line (BX) axisymmetricly, at least two planet The geomery for taking turns (32) is identical.

7. electric drive (100) according to claim 2 comprising pin wheel (5), wherein be arranged on the pin wheel (5) more A pin shaft (52), the multiple pin shaft (52) deviate the axis (AX), and multiple pin holes are arranged in each planetary gear (32) (320), each pin shaft (52) is inserted into a pin hole (320) of each planetary gear (32).

8. electric drive (100) according to claim 7, wherein the radius of the pin shaft (52) and the eccentricity (e) The sum of be less than the pin hole (320) radius.

9. electric drive (100) according to claim 7 further includes end cap (6), wherein the end cap (6) is fixed on Axle bed (60) are arranged in the opening of the second end (308), the end cap (6), and output shaft (50) are arranged in the pin wheel (5), described Output shaft (50) is installed in the axle bed (60).

10. electric drive (100) according to claim 7, wherein the pin wheel (5) also sets up inner seat (58), described interior Mounting pin wheel bearing (7) between seat (58) and the pivot (12).