CN116080379A - Distributed dual motor drive system and vehicle - Google Patents

Abstract

The invention provides a distributed dual-motor drive system and a vehicle, comprising two motors, the two motors are sequentially arranged at intervals in the length direction of the vehicle, and the two motors are arranged in a 180-degree rotational symmetry; The motors are all connected to a gear reduction mechanism, and the two gear reduction mechanisms are respectively located on both sides of the vehicle width direction, and the two gear reduction mechanisms are symmetrically arranged in a 180-degree rotation. By arranging the two motors rotationally symmetrically at 180 degrees, the two gear reduction mechanisms are also disposed rotationally symmetrical at 180 degrees, and the centers of rotational symmetry of the two motors and the centers of rotational symmetry of the two gear reduction mechanisms It is the same center of rotational symmetry, which helps to reduce the layout space in the width direction of the car, optimizes the overall space layout of the dual-motor drive system, and has a simple transmission structure.

Description

Distributed dual motor drive system and vehicle

technical field

The present invention relates to the technical field of drive systems, in particular to a distributed dual-motor drive system and a vehicle, especially to a new energy vehicle drive system.

Background technique

New energy vehicles, especially electric vehicles, are currently the mainstream research direction in the automobile manufacturing industry. At present, the pure electric system in the field of new energy vehicles has a distributed motor drive system, and the left and right wheels each need a motor to drive, but based on the overall The space structure of the vehicle, the existing technical solutions for the symmetrical arrangement of motors on the market are difficult to meet the spatial size layout of the vehicle.

The existing Chinese patent application document with the publication number CN115257333A discloses a dual-motor drive assembly for an electric all-terrain vehicle, including an independently controlled front drive axle and a rear drive axle, both of which include A motor, a gear transmission case, a differential, and two semi-shafts that are power-connected in turn, the differential is arranged between the two semi-shafts, and the differentials are all equipped with differential locks, and the output of the motor The axis is parallel or perpendicular to the semi-axis.

The dual-motor drive assemblies in the prior art are arranged side by side in the width direction of the electric vehicle, which leads to difficulties in space layout, and the structure of the electric drive assembly is complex, which needs to be improved.

Contents of the invention

Aiming at the defects in the prior art, the object of the present invention is to provide a distributed dual-motor drive system and a vehicle.

A distributed dual-motor drive system and a vehicle provided by the present invention include two motors, the two motors are arranged at intervals in the length direction of the vehicle, and the two motors are arranged in a 180-degree rotational symmetry; Each of the motors is transmission-connected with a gear reduction mechanism, and the two gear reduction mechanisms are respectively located on both sides of the vehicle width direction, and the two gear reduction mechanisms are symmetrically arranged in a 180-degree rotation.

Preferably, the two motors are arranged in a dislocation, and the two motors overlap in the width direction of the vehicle, and the output shafts of the two motors are at the same height in the height direction of the vehicle.

Preferably, the gear reduction mechanism includes a motor output gear, an intermediate transmission shaft and a reduction output shaft; the intermediate transmission shaft is coaxially fastened with a first transmission tooth and a second transmission tooth, and the first transmission tooth and The output gear of the motor meshes; the third transmission gear is fastened coaxially on the deceleration output shaft, and the third transmission tooth meshes with the second transmission tooth.

Preferably, both the intermediate transmission shaft and the reduction output shaft are located at the lower side of the motor output shaft in the height direction of the vehicle.

Preferably, the axes of the two deceleration output shafts are collinear in the vehicle width direction.

Preferably, the rotational symmetry point of the two motors is located on the line connecting the axes of the two reduction output shafts.

Preferably, it also includes a main housing and two end covers, the two motors and the two gear reduction mechanisms are installed in the main housing, and the two end covers are respectively fastened and installed on the main housing along the automobile Both ends of the width direction.

Preferably, the outlet ends of the two motors are respectively located at both ends of the main housing along the width direction of the vehicle, and the outlet wires are outlet along the radial direction of the motor, and a controller is integrated on the main housing, and the controller is connected with the The outlets of the two motors are connected.

Preferably, the controller can also be set separately from the main casing.

According to a vehicle provided by the present invention, the output shafts of the two gear reduction mechanisms are respectively connected to the wheels on both sides of the width of the vehicle.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the present invention, the two motors are arranged symmetrically at 180 degrees, and the two gear reduction mechanisms are also arranged symmetrically at 180 degrees, and the centers of rotational symmetry of the two motors and the two gear reduction mechanisms The center of rotational symmetry is the same center of rotational symmetry, which helps to reduce the layout space in the width direction of the car, and optimizes the overall space layout of the dual-motor drive system, and the transmission structure is simple.

2. The present invention further improves the integration of the dual-motor drive system by installing two motors and two gear reduction mechanisms in the main casing, and can integrate a controller on the main casing to realize three-in-one electric drive.

3. The present invention realizes the installation of the two motors and the gear reduction mechanism on the one hand through the space for installing the gear reduction mechanism formed by the cooperation of the two cavities on the main casing, the main casing and the end cover, and the other On the one hand, it ensures the stability of the dual-motor drive system, optimizes the space layout, and facilitates disassembly and assembly.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is a schematic diagram of the overall structure of the present invention mainly embodying the dual-motor drive system;

Fig. 2 is a schematic diagram of the overall structure in the Y-axis direction of the dual-motor drive system mainly embodied in the present invention;

Fig. 3 is a schematic diagram of the explosion structure of the present invention mainly embodying the dual-motor drive system;

Fig. 4 is a schematic diagram of the axial structure of the dual-motor drive system mainly embodied in the present invention.

As shown in the figure:

Motor 1 Second drive gear 25

Gear reduction mechanism 2 The third transmission gear 26

Motor output gear 21 Main housing 3

Intermediate transmission shaft 22 End cover 4

Deceleration output shaft 23 Chamber 5

The first transmission gear 24 Outlet terminal 6

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Embodiment one

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a distributed dual-motor drive system and a vehicle provided according to the present invention include a main housing 3, two end covers 4, two motors 1 and two The gear reduction mechanism 2, the two motors 1 and the two gear reduction mechanisms 2 are all installed in the main housing 3, and the two end covers 4 are respectively fastened and installed on the two ends of the main housing 3 along the width direction of the vehicle.

Define the width direction of the car as the Y-axis direction, the length direction of the car as the X-axis direction, and the height direction of the car as the Z-axis direction.

The two motors 1 are sequentially arranged at intervals in the length direction of the vehicle, and the two motors 1 are arranged symmetrically in a 180-degree rotation. The two motors 1 are respectively connected to the transmission of two gear reduction mechanisms 2, and the two gear reduction mechanisms 2 are respectively located on both sides of the vehicle width direction, and the two gear reduction mechanisms 2 are arranged in a 180-degree rotational symmetry.

Further, the two motors 1 are arranged in a misaligned position, and the output shafts of the two motors 1 are at the same height in the vehicle height direction. The two motors 1 are arranged at intervals in the X-axis direction. By arranging the two motors 1 in the vehicle width direction with a certain displacement and coincidence, it is convenient to reduce the axial size, and on this basis, the rationality of the engineering layout of other related components can be improved.

Furthermore, the gear reduction mechanism 2 includes an output gear 21 of the motor 1 , an intermediate transmission shaft 22 and a reduction output shaft 23 . A first transmission gear 24 and a second transmission gear 25 are fastened coaxially on the intermediate transmission shaft 22 , and the first transmission gear 24 meshes with the motor output gear 21 . The deceleration output shaft 23 is coaxially fastened with a third transmission tooth 26 , and the third transmission tooth 26 meshes with the second transmission tooth 25 . Both the intermediate transmission shaft 22 and the deceleration output shaft 23 are located on the lower side of the output shaft of the motor 1 in the vehicle height direction. The axes of the two reduction output shafts 23 are collinear in the vehicle width direction. The centers of rotational symmetry of the two motors 1 and the centers of rotational symmetry of the two gear reduction mechanisms 2 are the same center of rotational symmetry, and the rotational symmetry points of the two motors 1 are located on the line connecting the axes of the two reduction output shafts 23 .

Through the setting of the gear reduction mechanism 2 in the X-axis direction, the Y-axis direction and the Z-axis direction, the spatial layout structure of the dual-motor 1 drive system is optimized, making the spatial layout of the dual-motor 1 drive system more compact.

One of the end caps 4 is fastened on both sides of the main housing 3 along the width direction of the vehicle. Two chambers 5 are formed in the main housing 3 along the length of the vehicle. The axes of the two chambers 5 are all parallel to the vehicle. In the width direction, one motor 1 is coaxially arranged in the two chambers 5 respectively. The output shafts of the two motors 1 are connected with a gear reduction mechanism 2. The two gear reduction mechanisms 2 are respectively located on both sides of the main housing 3 along the width direction of the vehicle, and the main housing 3 is matched with the two end covers 4 respectively. An installation space for the gear reduction mechanism 2 is formed.

More specifically, the main housing 3 is provided with two spaced chambers 5, and the two motors 1 are respectively installed in the two chambers 5, and the two chambers 5 are arranged at intervals along the X-axis direction, and the two chambers The central axis of the chamber 5 is parallel to the Y-axis direction, and the distance between the central axes of the two chambers 5 and the central axis of the deceleration output shaft 23 is equal, but the height can be arranged obliquely on the whole vehicle. An installation space for the gear reduction mechanism 2 is formed between the two end covers 4 and the main housing 3 , and the two end covers 4 are fastened to the main housing 3 respectively. The output shaft of the motor 1 , the intermediate drive shaft 22 and the deceleration output shaft 23 are respectively rotatably connected to the end cover 4 through bearings, and the deceleration output shaft 23 protrudes outward through the end cover 4 .

The outlet terminals 6 of the two motors 1 are respectively located at both ends of the main housing 3 along the length direction of the vehicle, and the outlet wires go out along the radial direction of the motor 1. A controller is integrated on the main housing 3, and the controller is connected to the two motors 1 respectively. The outgoing terminal 6 is connected. A three-in-one electric drive in which the controller is integrated on the main housing 3 can be realized.

It should be noted that the parameters of the two motors 1 in this embodiment are the same, and the parameters of the two gear reduction mechanisms 2 are also the same. Through the vector control of two motors 1, the two outputs of the dual motor 1 drive system in the Y-axis direction are respectively controlled, and various working conditions such as differential speed and execution in the actual process are realized, and the traditional differential system structure is cancelled. , reducing costs. Through this space arrangement, the size of the dual-motor 1 drive system in the Y-axis direction is optimized, and A/B/C-class and pickup trucks can be easily arranged.

According to a vehicle provided by the present invention, it includes two driving wheels, the two driving wheels are located on both sides of the vehicle width direction, the output shafts of the two gear reduction mechanisms 2 are respectively connected to the wheels on both sides of the vehicle width, and two The deceleration output shaft 23 is respectively drivingly connected to the two wheels.

Variation 1

According to the distributed dual-motor drive system and the vehicle provided by the present invention, the controller can also be arranged separately from the main casing 3 . It realizes the two-in-one split electric drive in which the controller and the dual-motor 1 drive system are separated.

In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the application.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims (10)

1. The distributed double-motor driving system is characterized by comprising two motors (1), wherein the two motors (1) are sequentially arranged at intervals in the length direction of an automobile, and the two motors (1) are symmetrically arranged in a one-hundred-eighty degree rotation mode;

the two motors (1) are connected with gear reduction mechanisms (2) in a transmission manner, the two gear reduction mechanisms (2) are respectively located on two sides of the width direction of the vehicle, and the two gear reduction mechanisms (2) are symmetrically arranged in a one hundred eighty degree rotation mode.

2. The distributed dual-motor driving system according to claim 1, wherein two motors (1) are arranged in a staggered manner, the two motors (1) are staggered and overlapped in the width direction of the automobile, and the output shafts of the two motors (1) are equal in height direction of the automobile.

3. A distributed dual motor drive system according to claim 1, wherein the gear reduction mechanism (2) comprises a motor output gear (21), an intermediate drive shaft (22) and a reduction output shaft (23);

a first transmission tooth (24) and a second transmission tooth (25) are coaxially and fixedly arranged on the middle transmission shaft (22), and the first transmission tooth (24) is meshed with the motor output gear (21);

a third transmission tooth (26) is coaxially and fixedly arranged on the speed reduction output shaft (23), and the third transmission tooth (26) is meshed with the second transmission tooth (25).

4. A distributed dual motor drive system according to claim 3, characterized in that both the intermediate drive shaft (22) and the reduction output shaft (23) are located on the underside of the output shaft of the motor (1) in the direction of the car height.

5. A distributed two-motor drive system according to claim 3, characterized in that the axes of the two reduction output shafts (23) are collinear in the vehicle width direction.

6. A distributed dual motor drive system according to claim 5, characterized in that the rotational symmetry points of the two motors (1) are located on the axis connection of the two reduction output shafts (23).

7. A distributed dual motor drive system as claimed in claim 1, further comprising a main housing (3) and two end caps (4), both of said motors (1) and both of said gear reduction mechanisms (2) being mounted in the main housing (3), both of said end caps (4) being fixedly mounted at both ends of the main housing (3) in the vehicle width direction, respectively.

8. A distributed dual motor drive system according to claim 7, wherein the outlet terminals (6) of the two motors (1) are respectively located at two ends of the main housing (3) in the width direction of the vehicle, and the outlet wires are respectively led out in the radial direction of the motors (1), and a controller is integrated on the main housing (3) and is respectively connected with the outlet terminals (6) of the two motors (1).

9. A distributed dual motor drive system according to claim 8, wherein the controller is further arranged separately from the main housing (3).

10. A vehicle, characterized in that a distributed dual motor drive system according to any one of claims 1-9 is used, the output shafts of two gear reduction mechanisms (2) being in driving connection with the wheels on both sides of the vehicle width, respectively.

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