CN218839065U

CN218839065U - Coaxial planetary gear train vector electric drive axle

Info

Publication number: CN218839065U
Application number: CN202222955916.5U
Authority: CN
Inventors: 耿毓巍; 何开发; 李志深; 梁志海
Original assignee: Nexteer Automotive Suzhou Co Ltd
Current assignee: Nexteer Automotive Suzhou Co Ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-04-11
Anticipated expiration: 2032-11-07

Abstract

The utility model discloses a coaxial-type planetary gear train vector electric drive axle, be in including casing, setting motor, clutch in the shell, the clutch has 2, and its flywheel sets up the inside at the rotor of clutch side by side, and two clutches are connected respectively and are transmitted power to first planetary gear train and second planetary gear train. The utility model discloses a two clutch settings are inside the active cell of motor, and need not to set up differential mechanism and corresponding shafting part in addition, have reduced pure electric vehicles X ascending space and have taken, and the whole envelope space of clutch is miniaturized, compact structure, and the quality is less, and occupation space is little, is favorable to whole car to carry on arranging, will effectively reduce whole car energy consumption. The power is transmitted to the wheels through the planetary gear train, the advantages of large reduction ratio, compact structure, strong bearing capacity and small overall enveloping space of the planetary gear train are fully utilized, pure torque transmission between gears is stable, and the transmission efficiency is excellent.

Description

Coaxial planetary gear train vector electric drive axle

Technical Field

The utility model relates to a pure electric vehicles field especially relates to a coaxial type planetary gear train vector electric drive axle.

Background

The pure electric vehicle is a vehicle which takes a vehicle-mounted power supply as power and drives wheels to run by a motor, has smaller influence on the environment compared with the traditional vehicle, meets the requirements of energy conservation and emission reduction and has good driving feeling, and the current vehicle usually needs to be provided with a differential mechanism on an electric bridge and utilizes the differential mechanism to realize the rotating speed difference of left and right wheels so as to realize the curve running function of the vehicle.

In the prior art, in order to realize the steering performance of the vehicle, the driving motor is usually connected with a differential, as shown in the utility model patent with the chinese patent application No. 201520711397.5, including a casing, the motor, the planetary reducer and the differential coaxially arranged are arranged in the casing, an electric drive axle coaxially integrated with the motor, the planetary reducer and the differential is made, the differential is connected with the power of the left output shaft and the right output shaft, and the wheel hubs on both sides are driven by the left output shaft and the right output shaft to walk.

The arrangement structure occupies more cabin space of the whole automobile, particularly occupies the important X direction (the direction from the automobile head to the automobile tail) of the pure electric automobile, so that the space of a power battery of the whole automobile is further reduced, in addition, the turning angle and the turning performance of the differential mechanism are limited by the conversion rate and the allowable speed difference of the differential mechanism, and the cost of the differential mechanism is higher.

The stability of the drive train structure between driving motor and the wheel at the during operation is also especially important, and at gear operation in-process, the condition of vibration easily appears influences the stability of drive train structure, and in addition, the compactness of drive train structure also needs to promote to further reduce the space and occupy.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the above problems, the present invention provides a coaxial planetary gear train vector electric drive axle.

The utility model discloses a realize through following technical scheme:

the utility model provides a coaxial-type planetary gear train vector electric drive axle, includes the casing, sets up motor, clutch in the shell, the motor includes coaxial stator and the rotor that sets up, the clutch has 2, and its flywheel sets up side by side in the inside of rotor, and two clutches are connected respectively and are transmitted power to first planetary gear train and second planetary gear train, first planetary gear train and second planetary gear train structure is the same and the symmetry sets up, including input shaft and output shaft to and set up sun gear, planetary gear, ring gear and the planet carrier between the two, the sun gear is fixed on the input shaft, planetary gear meshes with sun gear and ring gear respectively, planetary gear's axis of rotation sets up on the planet carrier, the rotation axis of planet carrier with the output shaft links, the output shaft of first planetary gear train and second planetary gear train is connected with the wheel respectively.

Preferably, the flywheels of the two clutches are respectively connected with the rotor through a spline pair.

Preferably, the clutch plates of the two clutches are respectively coupled with the input shaft of the first planetary gear train and the input shaft of the second planetary gear train through spline pairs.

Preferably, the input shaft and the output shaft of the first planetary gear train are arranged on the same axis, and the input shaft and the output shaft of the second planetary gear train are arranged on the same axis.

Preferably, the input shafts of the first planetary gear train and the second planetary gear train are arranged on the same axis.

Preferably, a coupling for transmitting power is provided between the output shaft and the wheel.

Preferably, the motor, the first planetary gear train and the second planetary gear train are all arranged in the same shell.

Preferably, the ring gears of the first planetary gear train and the second planetary gear train are respectively arranged inside the shell through fixed coupling pairs arranged on the periphery of the ring gears.

The utility model discloses technical scheme's beneficial effect mainly embodies:

1. the two clutches are arranged inside the rotor of the motor, a differential mechanism and corresponding shafting parts do not need to be additionally arranged, the occupied space of the pure electric vehicle in the X direction is reduced, the overall enveloping space of the clutches is miniaturized, the structure is compact, the mass is small, the occupied space is small, the whole vehicle carrying and arrangement are facilitated, and the energy consumption of the whole vehicle is effectively reduced.

2. When reducing the space and taking up, increased the arrangement space of battery to promote whole car dynamic nature, can improve pure electric vehicles's continuation of the journey mileage.

3. The two clutches can be used for realizing the independent control of the left wheel end and the right wheel end, and simultaneously, the compaction amount of the clutch disc can be adjusted through hydraulic or mechanical structures according to the driving road condition and the driving style of the whole vehicle, so that the right wheel end and the left wheel end can be controlled timely, and the purpose of vector control of the right wheel and the left wheel is achieved.

4. The two clutches are not interfered with each other, the speed difference between the two clutches is large, a large turning angle can be realized, and the cost of the clutches is lower than that of a differential mechanism.

5. The power is transmitted to the wheels through the planetary gear train, the advantages of large reduction ratio, compact structure, strong bearing capacity and small overall enveloping space of the planetary gear train are fully utilized, pure torque transmission between gears is stable, and the transmission efficiency is excellent.

6. The bridge framework in the utility model can be applied to the front drive axle and the rear drive axle of the whole vehicle, and can be independently arranged on one of the drive axles to be used as a main drive power unit or an auxiliary drive power unit; and the device can also be arranged on two drive axles at the same time, so that four-wheel timely vector drive of the whole vehicle is realized.

Drawings

Fig. 1 is a schematic diagram of a coaxial planetary gear train vector electric drive axle in the present invention.

Detailed Description

In order that the objects, advantages and features of the invention may be more clearly and specifically shown and described, there shall now be shown and explained by way of non-limiting illustration of preferred embodiments. The embodiment is only a typical example of applying the technical scheme of the present invention, and all technical schemes formed by adopting equivalent replacement or equivalent transformation all fall within the scope of the claimed invention.

It is also stated that in the description of the embodiments, it is to be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first" and "second" in this document are used for descriptive purposes only and are not to be construed as indicating or implying a ranking of importance or an implicit indication of the number of technical features shown. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the present invention, "a plurality" means two or more unless specifically defined otherwise.

As shown in fig. 1, the utility model discloses a coaxial planetary gear train vector electric drive axle, including the motor, still include two planetary gear trains and two clutches 12 that the symmetry set up. One of the two clutches 12 is connected with the input end of a first planetary gear train, the other clutch is connected with the input end of a second planetary gear train, and the output shafts 9 of the first planetary gear train and the second planetary gear train are respectively connected with wheels 13.

The motor comprises a stator 2 and a rotor 3 which are coaxially arranged, the rotor 3 is hollow, two clutches 12 are arranged inside the rotor 3, and specifically, flywheels of the two clutches 12 are arranged inside the rotor side by side and are respectively connected with the rotor 3 through spline pairs. The two clutches 12 do not interfere with each other.

The first planetary gear train and the second planetary gear train respectively comprise an input end and an output end, the input ends of the two planetary gear trains are respectively provided with an input shaft 4, the input shafts 4 of the two planetary gear trains are respectively connected with corresponding clutches 12, and in one embodiment, the input shafts 4 of the first planetary gear train and the second planetary gear train are connected with the clutches 12 through spline pairs.

The output ends of the two planetary gear trains are respectively provided with an output shaft 9, the output shafts 9 are respectively connected with wheels 13, wherein a coupling piece is further arranged between the output shaft 9 on each planetary gear train and the corresponding wheel 13, the output shaft 9 is coupled with the wheels 13 through the coupling piece, so that the independent control of each wheel 13 is realized, the coupling piece is one or more of a coupler or a spline pair or a coupler, and in one embodiment, a coupler 8 for transmitting power is arranged between the output shaft 9 and the wheels 13.

In the preferred embodiment, the first planetary gear train and the second planetary gear train are identical in structure and respectively comprise an input shaft 4 and an output shaft 9, and a sun gear 11, a planetary gear 7, a ring gear 6 and a planet carrier 10 which are arranged between the input shaft 4 and the output shaft, wherein the sun gear 11 is fixed on the input shaft 4, the planetary gear 7 is respectively meshed with the sun gear 11 and the ring gear 6, the rotation shafts of the planetary gears 7 are arranged on the planet carrier 10, and the rotation shaft of the planet carrier 10 is connected with the output shaft 9. Of course, other planetary gear train configurations are suitable for the present invention, as will be appreciated by those skilled in the art.

In some embodiments, two clutches 12 are symmetrically arranged, and the first planetary gear train and the second planetary gear train are symmetrically arranged, wherein the motor as a driving mechanism and the two clutches 12 connecting the two planetary gear trains are positioned in the middle of the whole driving structure, so that the compactness of the whole vehicle arrangement structure is improved.

In some embodiments, the first planetary gear train and the second planetary gear train are symmetrically arranged, and the first planetary gear train and the second planetary gear train are identical in structure. The first planetary gear train and the second planetary gear train are arranged on the same axis, and the input shaft 4 and the output shaft 9 of the two planetary gear trains are arranged on the same axis. Because the rotation centers of the sun gear 11, the planet gears 7, the gear ring 6 and the planet carrier 10 are on the same axis, the coaxial arrangement among the bridge driving structures is realized, and the bridge driving structure has the characteristics of large reduction ratio, compact structure, strong bearing capacity, small overall envelope space, stable running among gears and the like.

In some embodiments, the first and second planetary gear trains are arranged in the housing 1 with a fixed coupling pair 5 provided between the outer periphery of the ring gear 6 and the inner wall of the housing 1. The motor, the first planetary gear train and the second planetary gear train are all arranged in the same shell 1, and output shafts 9 of the first planetary gear train and the second planetary gear train extend out of the shell 1 and are respectively coupled with wheels 13 through a coupling piece. Such a configuration maintains the integrity of the drive train. Of course, it is well known to those skilled in the art that the planetary gear set and the motor may be respectively disposed in the corresponding housings and then fixedly connected for manufacturing convenience.

The coaxial planetary gear train vector electric drive axle can be applied to a front drive axle and a rear drive axle of the whole vehicle, and can be independently arranged on one of the drive axles to serve as a main drive power unit or an auxiliary drive power unit; and the four-wheel drive device can also be arranged on two drive axles simultaneously, so that the four-wheel timely vector drive of the whole vehicle is realized.

The arrangement can realize the independent control of the left wheel end and the right wheel end, and realize the curve running function of the vehicle by independently controlling the speed of the left wheel end and the right wheel end. In addition, when driving on the road that the road conditions is complicated, the condition of idle running appears easily when wheel 13 is unsettled, and the differential mechanism of prior art structure can pass power constantly to the idle running wheel 13 that does not have resistance this moment, and the vehicle not only can not move forward, and a large amount of power also can run off, and the utility model discloses a when the clutch 12 independent control of mutually noninterfere left and right sides wheel end, clutch 12 does not provide power to unsettled wheel 13, can not cause power to run off.

The utility model discloses an in practical application, can go the road conditions and drive the style according to whole car and pass through the volume that compresses tightly of hydraulic pressure or mechanical structure adjustment clutch 12 pieces, the in time control of wheel end about realizing reaches the purpose of carrying out vector control to wheel 13 about, and then provides the hardware basis for realizing whole car autopilot and initiative safety.

The utility model has a plurality of implementation modes, and all technical schemes formed by adopting equivalent transformation or equivalent transformation all fall within the protection scope of the utility model.

Claims

1. Coaxial-type planetary gear train vector electric drive axle, its characterized in that: the motor comprises a shell, a motor and a clutch, wherein the motor and the clutch are arranged in the shell, the motor comprises a stator and a rotor which are coaxially arranged, the clutch is provided with 2 flywheels, the flywheels of the clutch are arranged in the rotor side by side, the two clutches are respectively connected with and transmit power to a first planetary gear train and a second planetary gear train, the first planetary gear train and the second planetary gear train are identical in structure and are symmetrically arranged, the first planetary gear train and the second planetary gear train comprise an input shaft and an output shaft, and a sun gear, a planetary gear, a gear ring and a planet carrier are arranged between the input shaft and the output shaft, the sun gear is fixed on the input shaft, the planetary gear is respectively engaged with the sun gear and the gear ring, the rotating shaft of the planetary gear is arranged on the planet carrier, the rotating shaft of the planet carrier is linked with the output shaft, and the output shafts of the first planetary gear train and the second planetary gear train are respectively connected with wheels.

2. The coaxial planetary gear train vector electric drive axle according to claim 1, wherein: the flywheels of the two clutches are respectively connected with the rotor through a spline pair.

3. The coaxial planetary gear train vector electric drive axle according to claim 2, wherein: clutch plates of the two clutches are respectively connected with an input shaft of the first planetary gear train and an input shaft of the second planetary gear train through spline pairs.

4. The coaxial planetary gear train vector electric drive axle according to any one of claims 1 to 3, wherein: the input shaft and the output shaft of the first planetary gear train are arranged on the same axis, and the input shaft and the output shaft of the second planetary gear train are arranged on the same axis.

5. The coaxial planetary gear train vector electric drive axle according to claim 4, wherein: the input shafts of the first planetary gear train and the second planetary gear train are arranged on the same axis.

6. The coaxial planetary gear train vector electric drive axle according to claim 4, wherein: and a coupling for transmitting power is arranged between the output shaft and the wheel.

7. The coaxial planetary gear train vector electric drive axle of claim 1, wherein: the motor, the first planetary gear train and the second planetary gear train are all arranged in the same shell.

8. The coaxial planetary gear train vector electric drive axle according to claim 1, wherein: the gear rings of the first planetary gear train and the second planetary gear train are respectively arranged in the shell through fixed coupling pairs arranged on the periphery of the gear rings.