CN212313189U

CN212313189U - Electrically driven axle for a vehicle

Info

Publication number: CN212313189U
Application number: CN202021257990.4U
Authority: CN
Inventors: 吴志强; 杨鹏飞; 李春光
Original assignee: Guangdong Fuwa Heavy Industry Co Ltd
Current assignee: Guangdong Fuwa Heavy Industry Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-01-08
Anticipated expiration: 2030-06-30

Abstract

The electric drive axle of vehicle, including the axle housing, the reduction gear, including a motor, an end cap, a controller, and a cover plate, the reduction gear includes the shell, drive assembly, the shell is fixed on the axle housing, the motor is arranged in the space that shell and axle housing enclose, the casing of motor includes preceding terminal surface, and the rear end face relative with preceding terminal surface, preceding terminal surface fixed connection is on the shell, and the output and the drive assembly hookup of motor, be fixed with the support on the axle housing, be provided with the connecting seat between motor casing and the support, the one end and the support fixed connection of connecting seat, set up at least one buffering subassembly between the rear end face of the other end and motor casing, this buffering subassembly includes the bracing piece, the cover is established at the outside shock attenuation cover of bracing piece, the shock attenuation cover is inlayed and is put in the. The utility model discloses utilize the shock attenuation cover to cushion the rear end portion of motor, play the effect of protection to the motor, increased the life of motor.

Description

Electrically driven axle for a vehicle

Technical Field

The utility model relates to the technical field of vehicles, concretely relates to electric drive axle of vehicle.

Background

Traditional commercial car is through fuel drive, the space that its engine occupy is big, and it is comparatively serious to environmental pollution, along with the continuous popularization of new forms of energy technique, some commercial cars begin to adopt motor drive, it forms the electric drive axle for the transaxle configuration motor of vehicle, it installs the motor on the frame, it is concrete, the shell of motor is on the axle housing of axle through the bolt fastening, the shell and the axle housing of motor are rigid connection, because the vehicle is at the in-process of traveling, deformation takes place for the axle housing pressurized, the shell of motor is asynchronous with the deformation of axle housing, above-mentioned rigid fit's axle housing and motor, can lead to the motor damage, and simultaneously, rigid fit's structure requires higher to the machining precision of part, when the parts machining precision is not high, also lead to the motor damage easily.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims at providing an electrically driven axle of vehicle, its damage to the motor when can cushioning the axle housing and warp increases the life of motor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an electrically driven axle of a vehicle comprises an axle housing, a speed reducer and a motor, wherein the speed reducer comprises a shell and a transmission assembly, the shell is fixedly connected to the axle housing, the motor is arranged in a space enclosed by the shell and the axle housing, the shell of the motor comprises a front end face and a rear end face opposite to the front end face, the front end face is fixedly connected to the shell, the output end of the motor is connected with the transmission assembly, a support is fixed on the axle housing, a connecting seat is arranged between the rear end surface of the motor housing and the support, one end of the connecting seat is fixedly connected with the support, at least one buffer component is arranged between the other end of the connecting seat and the rear end face of the motor shell, the buffer component comprises a support rod and a shock absorption sleeve sleeved outside the support rod, the shock absorption sleeve is embedded in a through hole formed in the other end of the connecting seat, one end of the support rod facing the rear end face of the motor shell protrudes out of the connecting seat and is fixedly connected with the rear end face of the motor shell.

The bracing piece is including the worn smooth rod portion of connecing in the shock attenuation cover and connect in the worn joint pole that smooth rod portion is close to motor one end, and motor casing's rear end face is provided with the spliced eye, and the worn joint pole is in order to fix bracing piece and motor casing's rear end face in the spliced eye.

The bracing piece is still including being located the screw thread portion that motor one end was kept away from to smooth rod portion, and the spiro union has lock nut on the screw thread portion, and the one end that the inner wall of through-hole is close to the motor is provided with a limit flange, and the shock attenuation cover is injectd between limit flange and lock nut.

The external diameter of screw thread portion is less than the external diameter of polished rod portion, forms a spacing step in screw thread portion and polished rod portion linking department, and the centre gripping has a spacing separation blade between lock nut and the spacing step, and the external diameter of spacing separation blade is greater than the internal diameter of through-hole.

A screw cap is arranged at the joint of the polished rod part and the cross-connecting rod.

A boss is convexly arranged on the rear end face of the motor shell, and the insertion hole is formed in the boss.

The support is provided with a supporting block protruding out of one side of the axle housing, the connecting seat is fixed on the supporting block through a fastening bolt, and at least one adjusting gasket is arranged between the supporting block and the connecting seat.

One side of the connecting seat is convexly provided with a fixed block, the fixed block is arranged on the supporting block, the fixed block is provided with a porous mounting hole, the supporting block is provided with a plurality of bolt holes in one-to-one correspondence with the mounting holes, and the fastening bolt penetrates through the mounting holes from top to bottom and then is screwed in the bolt holes.

The lower surface of the fixed block and the upper surface of the supporting block are both planes, and the adjusting gasket is arranged between the lower surface of the fixed block and the upper surface of the supporting block.

A first connecting flange is arranged on a shell of the speed reducer, a second connecting flange is arranged on the front end face of the motor, and the first connecting flange and the second connecting flange are fixed together through a connecting bolt.

The beneficial effects of the utility model reside in that:

the utility model discloses utilize the bracing piece to fix at motor casing's rear end to set up the shock attenuation cover between bracing piece and connecting seat, make motor casing's rear end and be fixed in the flexible cooperation of connecting seat on the axle housing, when the axle housing bears and takes place deformation, utilize the shock attenuation cover to cushion the rear end of motor, play the effect of protection to the motor, avoid the motor to receive the damage, increased the life of motor.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the installation of the present invention;

fig. 3 is a cross-sectional view of the buffer assembly and the connecting seat in fig. 2.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1, 2 and 3, the electrically driven axle for a vehicle of the present invention comprises an axle housing 10, a speed reducer 20 and a motor 30, wherein the speed reducer 20 comprises a housing 21 and a transmission assembly 22, the housing 21 is fixedly connected to the lute hole of the axle housing 10, and encloses a mounting space together with the lute hole of the axle housing 10, the transmission assembly 22 is disposed in the mounting space, the axis of the motor 30 is aligned with the axial direction of the axle housing 10, the housing of the motor 30 comprises a front end surface and a rear end surface opposite to the front end surface, the front end surface is fixedly connected to the housing 21 of the speed reducer 20, specifically, a first connecting flange 211 is disposed on the housing 21, a second connecting flange 31 is disposed on the periphery of the front end surface of the motor 30, the first connecting flange 211 and the second connecting flange 31 are fastened together by a plurality of connecting bolts, so that the front end of the housing of the motor 30 is fixed together with the housing 21 of the speed reducer 20, of course, the front end face of the motor 30 may also be fixed on the housing 21 of the reducer 20 by other connection means; the shaft of the motor 30 extends from the front end of the housing of the motor 30 and is coupled to the input end of the transmission assembly 22, so that the power of the motor 30 can be transmitted through the transmission assembly 22 to the axle shafts located in the axle housing 10 and then transmitted to the wheel end through the axle shafts to drive the vehicle. A support 100 is fixed on the axle housing 10, a connecting seat 40 is arranged between the rear end face of the housing of the motor 30 and the support 100, a main part of the connecting seat 40 is a connecting arm 42, one end of the connecting arm 42 is fixedly connected to the support 100, at least one buffer component is arranged between the other end of the connecting arm 42 and the housing of the motor 30, the buffer component comprises a support rod 51 and a buffer sleeve 52, wherein a through hole 421 is formed at the other end of the connecting arm 42, the buffer sleeve 52 is sleeved outside the support rod 51 and embedded in the through hole 421, that is, the buffer sleeve 52 is arranged between the inner wall of the through hole 421 and the support rod 51, one end of the support rod 51 facing the motor 30 penetrates out of the buffer sleeve 52 and protrudes out of the connecting seat 40, and the one end of the support rod 51 protrudes out of the connecting seat 40 and is fixedly connected to the.

The above structure of the utility model, the rear end portion at the motor 30 casing is fixed to bracing piece 51 to set up damping sleeve 52 between bracing piece 51 and connecting seat 40, make the rear end portion of motor 30 casing and the cooperation that is fixed in connecting seat 40 flexibility on axle housing 10, when axle housing 10 bears and takes place deformation, utilize damping sleeve 52 to cushion the rear end portion of motor 30, play the effect of protection to motor 30, avoid motor 30 to receive the damage, increased motor 30's life.

In a preferred embodiment, the support rod 51 includes a polished rod portion 511 and a through rod 514, wherein the polished rod portion 511 is inserted into the damping sleeve 52, the through rod 514 extends from an end of the polished rod portion 511 close to the motor 30, a plug hole 33 is provided on a rear end surface of the housing of the motor 30, and the through rod 514 is inserted into the plug hole 33, so as to fix the support rod 51 on the rear end surface of the housing of the motor 30. The external thread may be formed on the exterior of the penetrating rod 514, the internal thread may be formed in the inserting hole 33, and the penetrating rod 514 is screwed into the inserting hole 33, so that the penetrating rod 514 is screwed with the rear end face of the housing of the motor 30, and of course, the penetrating rod 514 may be fixed with the inserting hole 33 in other manners; in addition, a boss 32 is arranged on the rear end face of the casing of the motor 30, the insertion hole 33 is arranged on the boss 32, so that the insertion hole 33 has a relatively large axial size, and thus, the size of the penetrating rod 514 inserted into the insertion hole 33 is correspondingly increased, so that the penetrating rod 514 is not easy to separate from the insertion hole 33, more importantly, when the axle housing 10 deforms, the connecting seat 40 drives the supporting rod 51 to swing, and because the size of the penetrating rod 514 inserted into the insertion hole 33 is large, the stress concentration at the matching part of the penetrating rod 514 and the casing of the motor 30 can be avoided, and meanwhile, the boss 32 is used for reinforcing the part of the casing of the motor 30, which is located at the periphery of the insertion hole 33, so that the rear end face of the casing of the motor 30 has good strength, and the large stress caused by the swinging of the supporting rod.

In addition, the support rod 51 further comprises a threaded portion 512 located at one end of the polished rod portion 511 far away from the motor 30, a locking nut 54 is screwed on the threaded portion 512, a limit flange 422 is arranged on the inner wall of the through hole 421, the limit flange 422 is located at one end of the through hole 421 close to the motor 30, one end of the shock-absorbing sleeve 52 close to the motor 30 abuts against the limit flange 422, and the locking nut 54 is located at the outer side of the other end of the shock-absorbing sleeve 52, so that the shock-absorbing sleeve 52 is limited between the limit flange 422 and the locking nut 54; furthermore, a limit step is formed at the joint of the polished rod portion 511 of the threaded portion 512, the outer diameter of the threaded portion 512 is smaller than the outer diameter of the polished rod portion 511, a limit stop piece 53 of the pressure head is sleeved outside the threaded portion 512, the limit stop piece 53 is clamped between the limit step and the lock nut 54, the outer diameter of the limit stop piece 53 is larger than the inner diameter of the through hole 421, and the limit stop piece 53 and the connecting arm 42 form a limit structure to prevent the supporting rod 51 from transitionally moving towards the direction close to the motor 30. In addition, a nut 513 is disposed at a position where the polished rod portion 511 is engaged with the through rod 514, the nut 513 is engaged with the connecting arm 42 to perform a limiting function, so as to prevent the supporting rod 51 from moving away from the motor 30, and at the same time, the nut 513 facilitates the tightening of the locking nut 54 on the threaded portion 512 during the installation.

In another limited embodiment of the present invention, a supporting block 11 is disposed on the support 100, the supporting block 11 is convexly disposed on one side of the axle housing 10 close to the motor 30, the connecting seat 40 is fixed on the supporting block 11 through the fastening bolt 44, and at least one adjusting gasket 45 is disposed between the supporting block 11 and the connecting seat 40, the distance between the connecting seat 40 and the supporting block 11 can be adjusted by the adjusting gasket 45, so as to change the installation height of the connecting seat 40, and then the supporting rod 51 can be aligned with the housing of the motor 30 when installing, so as to overcome the problem that the assembly is difficult due to the processing error of the component. A plurality of stacked adjusting shims 45 may be disposed between the support block 11 and the connection seat 40, one or more adjusting shims 45 may be removed when the installation height of the connection seat 40 needs to be reduced, and one or more adjusting shims 45 may be added when the installation height of the connection seat 40 needs to be increased.

In addition, a fixing block 41 is convexly arranged on one side of a connecting arm 42 serving as a main body part of the connecting seat 40, the size of the fixing block 41 is consistent with that of the supporting block 11 and is arranged above the supporting block 11, the adjusting gasket 45 is clamped between the supporting block 11 and the fixing block 41, a plurality of mounting holes 411 are arranged on the fixing block 41, a plurality of bolt holes 111 are arranged on the supporting block 11, the bolt holes 111 correspond to the mounting holes 411 one by one, a pre-tightening gasket 43 is further arranged on the fixing block 41, a plurality of fastening bolts 44 penetrate through the pre-tightening gasket 43 from top to bottom and penetrate through the mounting holes 411 one by one, and then are respectively screwed in the bolt holes 111, so that the fixing block 41 is fixedly connected with the supporting block 11. Of course, increase the precision of regulation, the utility model discloses an above-mentioned lower surface of fixed block 41 and the upper surface of supporting shoe 11 are the plane, and adjusting shim 45 is by the centre gripping between the lower surface of fixed block 41 and the upper surface of supporting shoe 11.

The utility model discloses in, can only set up an foretell buffering subassembly between the rear end face of connecting seat 40 and motor 30 casing, also can be as shown in fig. 1, 2, set up three buffering subassembly between the rear end face of connecting seat 40 and motor 30 casing, a triangular supports structure is constituteed to three buffering subassembly, of course, in other embodiments, can set up the buffering subassembly of different quantity as required.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The electrically driven axle of the vehicle is characterized by comprising an axle housing, a speed reducer and a motor, wherein the speed reducer comprises a shell and a transmission assembly, the shell is fixedly connected to the axle housing, the motor is arranged in a space enclosed by the shell and the axle housing, the shell of the motor comprises a front end face and a rear end face opposite to the front end face, the front end face is fixedly connected to the shell, the output end of the motor is connected with the transmission assembly, a support is fixed on the axle housing, a connecting seat is arranged between the rear end surface of the motor housing and the support, one end of the connecting seat is fixedly connected with the support, at least one buffer component is arranged between the other end of the connecting seat and the rear end face of the motor shell, the buffer component comprises a support rod and a shock absorption sleeve sleeved outside the support rod, the shock absorption sleeve is embedded in a through hole formed in the other end of the connecting seat, one end of the support rod facing the rear end face of the motor shell protrudes out of the connecting seat and is fixedly connected with the rear end face of the motor shell.

2. The electrically driven axle of a vehicle according to claim 1, wherein the support rod includes a rod portion inserted into the damper housing and a through-connection rod connected to an end of the rod portion adjacent to the motor, and the motor housing has a rear end surface provided with an insertion hole through which the through-connection rod is inserted to fix the support rod to the rear end surface of the motor housing.

3. The electrically driven axle of a vehicle according to claim 2, wherein the support rod further comprises a threaded portion at an end of the rod portion remote from the motor, a lock nut is screwed to the threaded portion, a limit flange is provided at an end of an inner wall of the through hole close to the motor, and the damper housing is defined between the limit flange and the lock nut.

4. The electrically driven axle of a vehicle according to claim 3, wherein the outer diameter of the threaded portion is smaller than the outer diameter of the polished rod portion, a limit step is formed at a junction of the threaded portion and the polished rod portion, and a limit stopper is sandwiched between the lock nut and the limit step, and the outer diameter of the limit stopper is larger than the inner diameter of the through hole.

5. The electrically driven axle of a vehicle according to claim 4, wherein a nut is further provided at a position where the polished rod portion engages with the cross-connecting rod.

6. An electrically driven axle for a vehicle according to claim 2, wherein a boss is provided to protrude from a rear end surface of the motor housing, and the insertion hole is provided in the boss.

7. The electrically driven axle of a vehicle according to claim 1, wherein the carrier is provided with a support block protruding from one side of the axle housing, the coupling seat is fixed to the support block by a fastening bolt, and at least one adjusting washer is provided between the support block and the coupling seat.

8. The electrically driven axle of claim 7, wherein a fixing block is protruded from one side of the connecting seat, the fixing block is disposed on the supporting block, the fixing block is formed with a plurality of mounting holes, the supporting block is formed with a plurality of bolt holes corresponding to the mounting holes, and the fastening bolts are screwed into the bolt holes after passing through the mounting holes from top to bottom.

9. The electrically driven axle of a vehicle according to claim 8, wherein the lower surface of the fixing block and the upper surface of the supporting block are both flat surfaces, and the shim is interposed between the lower surface of the fixing block and the upper surface of the supporting block.

10. An electrically driven axle of a vehicle as claimed in claim 1, wherein a first connecting flange is provided on the housing of the speed reducer, a second connecting flange is provided on the front end face of the motor, and the first connecting flange and the second connecting flange are fixed together by means of connecting bolts.