CN211493538U - Electric vehicle rear drive axle assembly integrated with motor - Google Patents

Electric vehicle rear drive axle assembly integrated with motor Download PDF

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Publication number
CN211493538U
CN211493538U CN201922347796.9U CN201922347796U CN211493538U CN 211493538 U CN211493538 U CN 211493538U CN 201922347796 U CN201922347796 U CN 201922347796U CN 211493538 U CN211493538 U CN 211493538U
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China
Prior art keywords
planet carrier
assembly
motor
half shaft
axle housing
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CN201922347796.9U
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Chinese (zh)
Inventor
徐珊珊
陈利
刘艳平
黄子鑫
郭玉祥
向莎
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Hefei AAM Automotive Driveline and Chassis System Co Ltd
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Hefei AAM Automotive Driveline and Chassis System Co Ltd
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Abstract

The utility model provides an electric motor car rear drive axle assembly of integrated motor, including PMSM, planetary gear reducer assembly, differential mechanism assembly, left axle housing, right axle housing, major axis, minor axis, wheel end, PMSM installs in the left end of planetary reducer assembly, and motor right-hand member lid and planetary reducer assembly pass through bolted connection, and motor left-hand member lid and left axle housing pass through the tang location, bolted connection; the left end of the differential assembly is connected to the lining plate through a planet carrier of a second-stage planetary gear reducer, the right end of the differential assembly is connected to a reducer shell through a tapered roller bearing, and a right axle shell is connected with the reducer shell through a bolt; the long half shaft and the short half shaft transmit power to the wheel end connected with the half shaft gear through the differential assembly. The utility model discloses complete machine compact structure, reasonable in design, job stabilization nature is good, electric energy recycle rate is high, easy maintenance, strong adaptability and advantage such as durable.

Description

Electric vehicle rear drive axle assembly integrated with motor
Technical Field
The utility model relates to an integrated motor's electric motor car rear drive axle assembly belongs to electric automobile technical field.
Background
In the field of light commercial vehicles, the current electric automobiles realize the driving of the whole automobile by replacing a rear axle of a traditional engine driving tooth bevel gear speed reducing structure with a motor. Its advantages are large size, heavy weight, high cost and low electric energy recovery rate. The problem of the pure electric commercial vehicle in the use process is increasingly prominent, wherein the problem of the integration of the driving rear axle is particularly prominent.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model aims to solve the problems of large size, high cost, low electric energy recovery utilization rate and the like of the motors of the current electric logistics vehicles, the small electric trucks and the like, and provides a coaxial electric vehicle rear drive axle assembly with the high integration of permanent magnet synchronous motors, planetary gear reducers and differentials, and the structure is more compact and the layout is more reasonable.
The utility model discloses a solve the technical scheme that the problem that provides adopted and be: a rear drive axle assembly of an electric vehicle integrating a motor comprises a permanent magnet synchronous motor, a planetary gear reducer assembly, a differential assembly, a left axle housing, a right axle housing, a long half shaft, a short half shaft and a wheel end, wherein the permanent magnet synchronous motor is installed at the left end of the planetary gear reducer assembly, a motor right end cover is connected with the planetary gear reducer assembly through a bolt, and the motor left end cover is positioned with the left axle housing through a seam allowance and is connected with the left axle housing through a bolt; the left end of the differential assembly is connected to the lining plate through a planet carrier of a second-stage planetary gear reducer, the right end of the differential assembly is connected to a reducer shell through a tapered roller bearing, and a right axle shell is connected with the reducer shell through a bolt; the long half shaft and the short half shaft transmit power to the wheel end connected with the half shaft gear through the differential assembly.
Furthermore, one end of the long half shaft and one end of the short half shaft are respectively connected with the wheel end on the side where the half shaft and the short half shaft are located through a half shaft sleeve.
Furthermore, the planetary gear reducer assembly is arranged in the right axle housing and comprises two stages of planet gears, the output of the permanent magnet synchronous motor is decelerated and torque-increased through two-stage deceleration, a planet carrier of the first stage of planet gears is supported through two bearings, one end of the planet carrier is supported on the motor housing, the other end of the planet carrier is indirectly connected with the axle housing through a bearing seat, and the output of the first stage of planet carrier is used as the input of a second stage of sun gear; a planet carrier of the secondary planet gear and a differential assembly shell are integrated into a whole to be used as rear axle torque output, and the torque is transmitted to wheel ends on two sides through the differential assembly; the second-stage planet carrier is supported by two bearings, one end of the second-stage planet carrier is supported on the first-stage planet carrier, and the other end of the second-stage planet carrier is supported on the right axle housing.
Furthermore, a primary gear ring of the planetary reducer assembly is connected with a right axle housing through a cylindrical pin; the secondary gear ring is connected with the right axle housing through a bolt.
Further, the one-level planet carrier supports through one big one little two deep groove ball bearings, big bearing is located the planet carrier left end, the one-level planet carrier is connected to the inner circle, the outer lane is connected with the motor casing, and the four corners location is carried out, bear the axial force that comes the reduction gear biography to turn round the in-process to form by oneself when supporting, little bearing is located the planet carrier right-hand member, the inner circle connects the planet carrier, the outer lane passes through the bearing frame and is connected with the axle housing, and with wave spring pretension outer lane, make planet carrier system have a pretightning force all the time when supporting, avoid two bearings to cause the bearing to.
Furthermore, the long half shaft is supported in the middle of the left axle housing through a deep groove ball bearing with self sealing.
The utility model has the beneficial technical effects that: the whole machine has the advantages of compact structure, reasonable design, good working stability, high electric energy recovery rate, convenient maintenance, strong adaptability, durability and the like.
Drawings
The technical solution of the present invention will be described in detail with reference to the accompanying drawings
Fig. 1 is a schematic structural diagram of the motor and two-stage planetary gear speed reduction of the present invention.
In the figure: 1. permanent magnet synchronous machine, 2, the first grade planet wheel speed reduction, 3, the second grade planet wheel speed reduction.
Detailed Description
A rear drive axle assembly of an electric vehicle comprises a permanent magnet synchronous motor 1, a planetary gear reducer assembly, a differential assembly, a left axle housing, a right axle housing, a long half shaft, a short half shaft and a wheel end, wherein the permanent magnet synchronous motor is connected with the left axle housing and the right axle housing; the right axle housing contains two-stage planet gear speed reduction, and the output of the motor is subjected to speed reduction and torque increase through the two-stage speed reduction; the planet carrier of the first-stage planet gear speed reduction is supported by two bearings, one end of the planet carrier is supported on the motor shell, and the other end of the planet carrier is indirectly connected with the axle housing through a bearing seat; the output of the first-stage planet carrier is used as the input of a second-stage sun gear; a planet carrier reduced by the secondary planet gear and a differential shell are integrated into a whole to be used as rear axle torque output, and the torque is transmitted to wheel ends on two sides through the differential; the second-stage planet carrier is supported through two bearings, one end bearing is supported on the first-stage planet carrier, and the other end bearing is supported on the axle housing.
As shown in fig. 1, a permanent magnet synchronous motor 1 is connected with a left axle housing and a right axle housing through bolts; the right axle housing contains two-stage planet gear speed reduction, and the output of the motor is subjected to speed reduction and torque increase through the two-stage speed reduction; the planet carrier of the primary planet gear speed reduction 2 is supported by two bearings, one end of the planet carrier is supported on the motor shell, and the other end of the planet carrier is indirectly connected with the axle shell through a bearing seat; the output of the first-stage planet carrier is used as the input of a second-stage sun gear; the planet carrier of the secondary planet gear speed reduction 3 and the differential shell are integrated into a whole to be used as rear axle torque output, and the torque is transmitted to wheel ends at two sides through the differential; the second-stage planet carrier is supported through two bearings, one end bearing is supported on the first-stage planet carrier, and the other end bearing is supported on the axle housing.
The permanent magnet synchronous motor and the planetary reducer assembly are positioned in the middle of the whole drive axle; the permanent magnet synchronous motor is arranged at the left end of the planetary reducer assembly, and a right end cover of the motor is connected with the planetary reducer assembly through a bolt; the left end cover of the motor is positioned with the left axle housing through a seam allowance and connected through a bolt; the left end of the planetary reducer is connected with the right end cover of the motor, and the right end of the planetary reducer is connected with the differential assembly through a bolt by a planet carrier of the second-stage planetary reducer; the left end of the differential assembly is connected to the lining plate through a planet carrier of the second-stage planetary gear reducer, and the right end of the differential assembly is connected to the reducer shell through a tapered roller bearing; the long half shaft and the short half shaft transmit power to a wheel end through a half shaft gear of the differential assembly; the left axle housing and the right axle housing are respectively connected with a left end cover of the motor and a reducer housing through bolts; the other end is connected with the wheel end through a semi-axis sleeve.
A primary gear ring of the planetary reducer assembly is less stressed and is connected with the axle housing through a cylindrical pin; the secondary gear ring is relatively stressed and is connected with the axle housing through a bolt; the long half shaft is supported in the middle of the left axle housing through the deep groove ball bearing with self sealing, so that the jumping amount of the long half shaft in the rotating process is reduced, and an oil seal is protected.
The primary planet carrier is supported by two large deep groove ball bearings, one small deep groove ball bearing and the other large deep groove ball bearing, the large bearing is positioned at the left end of the planet carrier, the inner ring of the primary planet carrier is connected with the inner ring of the primary planet carrier, the outer ring of the primary planet carrier is connected with the motor shell, and four corners of the primary planet carrier are positioned to play a supporting role and bear axial force formed in a torque transmission process of the self-; the small bearing is located the planet carrier right-hand member, and the planet carrier is connected to the inner circle, and the outer lane passes through the bearing frame to be connected with the axle housing to with wave spring pretension outer lane, make the planet carrier system have a pretightning force all the time when playing the supporting role, avoid two bearings to cause the bearing to become invalid in advance because of the no-load starts friction in the twinkling of an eye.
The structure that long, short semi-axis and wheel end are connected belongs to prior art, the utility model discloses how to realize permanent magnet synchronous motor, planetary gear reducer and differential mechanism highly integrated coaxial-type electric motor car rear drive axle assembly in the research, given above-mentioned structure, realized that the structure is more compact, the overall arrangement is more reasonable. Compared with the prior art, the utility model discloses complete machine compact structure, reasonable in design, job stabilization nature is good, electric energy recycle rate is high, easy maintenance, strong adaptability and advantage such as durable.
The above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope disclosed in the present invention.

Claims (6)

1. The utility model provides an integrated motor's electric motor car rear drive axle assembly which characterized in that: the permanent magnet synchronous motor is installed at the left end of the planetary reducer assembly, a motor right end cover is connected with the planetary reducer assembly through bolts, and the motor left end cover is positioned with the left axle housing through a seam allowance and connected with the left axle housing through bolts; the left end of the differential assembly is connected to the lining plate through a planet carrier of a second-stage planetary gear reducer, the right end of the differential assembly is connected to a reducer shell through a tapered roller bearing, and a right axle shell is connected with the reducer shell through a bolt; the long half shaft and the short half shaft transmit power to the wheel end connected with the half shaft gear through the differential assembly.
2. The motor-integrated electric vehicle rear drive axle assembly of claim 1, wherein: and one ends of the long half shaft and the short half shaft are respectively connected with the wheel end on the side where the long half shaft and the short half shaft are arranged through a half shaft sleeve.
3. The motor-integrated electric vehicle rear drive axle assembly of claim 1, wherein: the planetary gear reducer assembly is arranged in the right axle housing and comprises two stages of planet gears, the permanent magnet synchronous motor is output with speed reduction and torque increase through two-stage speed reduction, a planet carrier of the first stage planet gear is supported through two bearings, one end of the planet carrier is supported on the motor housing, the other end of the planet carrier is indirectly connected with the axle housing through a bearing seat, and the output of the first stage planet carrier is used as the input of a second stage sun gear; a planet carrier of the secondary planet gear and a differential assembly shell are integrated into a whole to be used as rear axle torque output, and the torque is transmitted to wheel ends on two sides through the differential assembly; the second-stage planet carrier is supported by two bearings, one end of the second-stage planet carrier is supported on the first-stage planet carrier, and the other end of the second-stage planet carrier is supported on the right axle housing.
4. The motor-integrated electric vehicle rear drive axle assembly of claim 3, wherein: the primary gear ring of the planetary reducer assembly is connected with the right axle housing through a cylindrical pin; the secondary gear ring is connected with the right axle housing through a bolt.
5. The motor-integrated electric vehicle rear drive axle assembly of claim 3, wherein: the one-level planet carrier supports through one big little two deep groove ball bearings, big bearing is located the planet carrier left end, the one-level planet carrier is connected to the inner circle, the outer lane is connected with the motor casing, and the four corners location, bear the axial force that comes the self-propelled reduction gear biography to turn round the in-process to form when supporting, little bearing is located the planet carrier right-hand member, the planet carrier is connected to the inner circle, the outer lane passes through the bearing frame and is connected with the axle housing, and with wave spring pretension outer lane, make the planet carrier system have a pretightning force all the time when supporting, avoid two bearings to cause the bearing.
6. The motor-integrated electric vehicle rear drive axle assembly of claim 1, wherein: the long half shaft is supported by a deep groove ball bearing with self sealing at the middle part of the left axle housing.
CN201922347796.9U 2019-12-24 2019-12-24 Electric vehicle rear drive axle assembly integrated with motor Active CN211493538U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922347796.9U CN211493538U (en) 2019-12-24 2019-12-24 Electric vehicle rear drive axle assembly integrated with motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922347796.9U CN211493538U (en) 2019-12-24 2019-12-24 Electric vehicle rear drive axle assembly integrated with motor

Publications (1)

Publication Number Publication Date
CN211493538U true CN211493538U (en) 2020-09-15

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ID=72418994

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922347796.9U Active CN211493538U (en) 2019-12-24 2019-12-24 Electric vehicle rear drive axle assembly integrated with motor

Country Status (1)

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CN (1) CN211493538U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112498011A (en) * 2020-12-04 2021-03-16 吉林大学 Coaxial modular drive axle structure for electric automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112498011A (en) * 2020-12-04 2021-03-16 吉林大学 Coaxial modular drive axle structure for electric automobile

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