The vehicle's drive unit, drive system, and vehicle

Abstract

This disclosure provides a drive device, drive system, and vehicle for a vehicle, relating to the field of vehicle technology, and more specifically to the fields of autonomous driving and driving testing. The vehicle drive device includes: an electric motor; a power transmission assembly connected to the output shaft of the motor and the wheels of the vehicle, configured to transmit power provided by the motor to the wheels to drive the wheels to rotate; a first mounting plate configured to mount the motor to the vehicle frame; and a shock absorption assembly including a rotating shaft fixedly connected to the first mounting plate and a rotating arm connected to the rotating shaft, the rotating arm being configured to rotate about the rotating shaft. The direction of extension of the rotating shaft is perpendicular to the direction in which the power transmission assembly drives the wheels to rotate.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, specifically to the fields of autonomous driving and driving testing, and more specifically to a vehicle drive device, drive system, and vehicle. Background Technology

[0002] With the development of electronic and network technologies, autonomous driving technology has become one of the important development directions in both the internet and vehicle sectors. Mature autonomous driving technology can free the driver's hands and, to a certain extent, reduce or even avoid traffic accidents. Before autonomous vehicles leave the factory, they typically undergo extensive testing and trials to ensure the reliability of the technology. Summary of the Invention

[0003] A vehicle drive unit, a vehicle drive system, and a vehicle are provided for facilitating the testing of autonomous vehicles.

[0004] One aspect of this disclosure provides a drive system for a vehicle, comprising: an electric motor; a power transmission assembly connected to the output shaft of the motor and a wheel of the vehicle, the power transmission assembly being configured to transmit power provided by the motor to the wheel to drive the wheel to rotate; a first mounting plate configured to mount the motor to the vehicle frame; and a shock-absorbing assembly including a rotating shaft fixedly connected to the first mounting plate and a rotating arm connected to the rotating shaft, the rotating arm being configured to rotate about the rotating shaft. The direction of extension of the rotating shaft is perpendicular to the direction in which the power transmission assembly drives the wheel to rotate.

[0005] Another aspect of this disclosure provides a drive system for a vehicle, comprising: a drive wheel assembly including a hub and drive wheels; and a drive device connected to the hub of at least one drive wheel assembly, wherein the drive device is the drive device for the vehicle provided in this disclosure.

[0006] Another aspect of this disclosure provides a vehicle including at least one drive system for the vehicle provided in this disclosure.

[0007] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0008] The accompanying drawings are provided to better understand this solution and do not constitute a limitation of this disclosure. Wherein:

[0009] Figure 1 This is a schematic diagram of the application scenarios of the vehicle's drive device, drive system, and vehicle according to embodiments of this disclosure;

[0010] Figure 2 This is a schematic diagram of the drive system of a vehicle according to an embodiment of the present disclosure;

[0011] Figure 3 This is a schematic diagram of the drive wheel device according to an embodiment of the present disclosure;

[0012] Figure 4 This is a schematic diagram of the structure of a vehicle drive unit according to an embodiment of the present disclosure;

[0013] Figure 5 This is a schematic diagram of the structure of a power transmission assembly according to an embodiment of the present disclosure;

[0014] Figure 6 This is a schematic diagram of the structure of a shock-absorbing assembly according to an embodiment of the present disclosure;

[0015] Figure 7 This is a schematic diagram of the structure of a vehicle drive unit according to another embodiment of the present disclosure;

[0016] Figure 8 This is an exploded view of the structure of a vehicle drive unit according to an embodiment of the present disclosure. Detailed Implementation

[0017] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0018] This disclosure provides a drive system for a vehicle, comprising a motor, a power transmission assembly, a first mounting plate, and a shock absorber assembly. The power transmission assembly is connected to the output shaft of the motor and the wheels of the vehicle, and is configured to transmit power provided by the motor to the wheels to drive them to rotate. The first mounting plate is configured to mount the motor to the vehicle frame. The shock absorber assembly includes a rotating shaft fixedly connected to the first mounting plate and a rotating arm connected to the rotating shaft, the rotating arm being configured to rotate about the rotating shaft. The direction of extension of the rotating shaft is perpendicular to the direction in which the power transmission assembly drives the wheels to rotate.

[0019] The following will combine Figure 1 The present disclosure describes the vehicle's drive unit, drive system, and application scenarios.

[0020] Figure 1 This is a schematic diagram of the application scenario of the vehicle drive device, drive system and vehicle according to the embodiments of this disclosure.

[0021] like Figure 1 As shown, this application scenario 100 includes a test target vehicle 110 and an autonomous vehicle 120.

[0022] In this application scenario 100, the autonomous vehicle 120 can be a vehicle before it leaves the factory or a vehicle that needs maintenance after leaving the factory. When testing the autonomous vehicle 120, a test target vehicle 110 can be used as a vehicle simulating driving on the road to test the obstacle avoidance and other functions of the autonomous vehicle 120.

[0023] For example, the test target vehicle 110 can be set on the road where the autonomous vehicle 120 is located to test whether the autonomous vehicle 120 can automatically change lanes when it is near the test target vehicle 110, or whether it can slow down, etc., to achieve autonomous driving safety testing.

[0024] According to embodiments of this disclosure, the test target vehicle 110 can be, for example, an autonomously navigating robot driven by a motor, capable of reaching a specified speed. For instance, this embodiment allows for a pre-set travel path for the test target vehicle 110 in the background, enabling it to travel according to this path and simulate real-world road conditions. Alternatively, the test target vehicle 110 can also be used in object transport scenarios to transport damaged target vehicles or any object that can be carried by the test target vehicle 110. For example, the test target vehicle 110 can also function as an intelligent handling robot.

[0025] In one embodiment, the test target vehicle 110 may include, for example, a fuselage frame, a fuselage cover, a drive system, a braking system, a power system, and a control system. The drive system may be used to drive the test target vehicle 110 and change its speed and direction. This drive system may include, for example, a power drive system and a steering drive system.

[0026] For example, the chassis frame can be a vehicle chassis frame, which, for example, allows the height of the test target vehicle 110 to be controlled within 20cm. The chassis frame can, for example, provide mounting positions for various components of the test target vehicle 110's systems, excluding the chassis cover. For example, it can provide mounting positions for steering wheels, drive wheels, motors, major electrical components, the central controller, the GPS antenna, and the battery. The chassis frame can also have multiple wiring holes for running communication lines and electrical wires between electronic components. The chassis frame can be reinforced with ribs to improve the test target vehicle's compressive strength and extend its service life.

[0027] For example, the fuselage cover can be detachably connected to the fuselage frame to cover components installed in various mounting positions within the fuselage frame, thus protecting these components from wind and rain. The fuselage cover can be a single-piece structure or composed of multiple covers joined together.

[0028] For example, a braking system may include brake cables, sensors, couplings, and motors. This braking system, for instance, can provide friction to the drive wheels or steering wheels under the action of its included motor, thereby hindering the rotation of the drive wheels or steering wheels and achieving braking.

[0029] For example, the power system may include battery modules, relays, power modules, etc., to provide electrical energy to the electronic devices in the test target vehicle 110. Under the action of this power system, the various electronic devices in the test target vehicle 110 can operate, enabling the test target vehicle to move. The power module, for example, can be used to convert the voltage provided by the battery module into a voltage suitable for use by the various electronic devices.

[0030] For example, the control system may include a communication module, a central controller, a motor driver, a rotary encoder, and a combined navigation device. This control system can use control algorithms to achieve control of the test target vehicle 110 and customize its trajectory.

[0031] In one embodiment, the test target vehicle may include the vehicle drive system provided in this disclosure for driving the test target vehicle. It is understood that the vehicle drive system provided in this disclosure may be, for example, a steering drive system or a power drive system. This vehicle drive system can be applied to any type of vehicle other than the test target vehicle.

[0032] Accordingly, this disclosure also provides a vehicle including the drive system of the vehicle. The vehicle may include one or more drive systems. For example, the vehicle may include two drive systems of the vehicle provided in this disclosure, each drive system including a drive wheel assembly and a drive assembly to drive a single wheel. Alternatively, the vehicle may include four drive systems of the vehicle provided in this disclosure, wherein two drive systems are used to drive two power drive wheels, and the other two drive systems are used to drive two steering drive wheels.

[0033] The following will combine Figures 2-3 The drive system of the vehicle provided in this disclosure is described in detail.

[0034] Figure 2 This is a schematic diagram of the drive system of a vehicle according to an embodiment of the present disclosure.

[0035] like Figure 2As shown, the vehicle's drive system 200 includes a drive wheel assembly 210 and a drive unit 220, with the drive unit 220 connected to the drive wheel assembly 210.

[0036] In one embodiment, the drive wheel device 210 may include a hub and a drive wheel, and the drive device 220 may include a motor. In this embodiment, the output shaft of the motor may be fixedly connected to the hub. Thus, when the motor is running, the output shaft of the motor can drive the hub to rotate, causing the hub to drive the drive wheel to rotate. The drive wheel may, for example, be fitted onto the hub and fixedly connected to it.

[0037] In one embodiment, the drive unit 220 may include, in addition to the motor, a speed reducer for matching the rotational speed and transmitting torque between the motor and the wheel hub. In this case, the input shaft of the speed reducer is connected to the output shaft of the motor, and the output shaft of the speed reducer is connected to the wheel hub.

[0038] In one embodiment, the drive device 220 may be a vehicle drive device provided in this disclosure, the specific structure of which can be found in the following description and will not be detailed here.

[0039] This embodiment can use a single drive unit to drive a single power drive wheel, thus avoiding a situation where multiple power drive wheels in the vehicle fail to rotate due to a drive unit failure. In other words, it improves the drive reliability of vehicles using the drive system of this disclosure embodiment.

[0040] In one embodiment, the drive wheel in the drive wheel assembly can be braked using a disc brake principle. A disc brake, also known as a disc brake, works by a hydraulic pump pushing a brake caliper to clamp the brake pads, generating friction on the drive wheel to achieve a braking effect. When using a disc brake principle, an external braking system can be employed, providing good ventilation and heat dissipation and reducing the risk of lock-up. However, no matter how much braking force is increased, this method cannot achieve the high braking force of a self-locking system.

[0041] In one embodiment, the drive wheel in the drive wheel assembly can be braked using a drum brake principle. For ease of braking, the following will describe... Figure 3 The drive wheel device according to the embodiments of this disclosure will be described in detail.

[0042] Figure 3 This is a schematic diagram of the drive wheel device according to an embodiment of the present disclosure.

[0043] like Figure 3 As shown, in this embodiment 300, the drive wheel device 310 may include a drive wheel 311, a hub 312, two drum brake pads 3131 and 3132, a rotating shaft 314, a fixed shaft 315, and a pull rod 316.

[0044] Drum brake pads 3131 and 3132 are disposed opposite to each other between the drive wheel 311 and the hub 312. Specifically, the hub 312 is sandwiched in the space enclosed by the drum brake pads 3131 and 3132, and the drive wheel 311 is sleeved around the drum brake pads 3131 and 3132.

[0045] In one embodiment, the drive wheel 311 may include a tire, a rim and spokes, and the portion of the hub 312 protruding from the two drum brake pads may be fixedly connected to the spokes, thereby driving the drive wheel 311 to rotate.

[0046] The rotating shaft 314 and the fixed shaft 315 are used to fix the two drum brake pads together. Specifically, the rotating shaft 314 can be clamped between the first end of drum brake pad 3131 and the first end of drum brake pad 3132, with the first ends of drum brake pad 3131 and drum brake pad 3132 close to each other. The fixed shaft can be clamped between the second end of drum brake pad 3131 and the second end of drum brake pad 3132, with the second ends of drum brake pad 3131 and drum brake pad 3132 close to each other.

[0047] The pull rod 316 is fixedly connected to the rotating shaft 314 and also to the vehicle's brake cable. Thus, when the brake cable is tightened, it drives the pull rod 316 and the rotating shaft 314 to rotate. Rotating the rotating shaft 314, for example, generates a thrust on the two drum brake pads, increasing the distance between the two first ends of the two drum brake pads and thus increasing the friction between the two drum brake pads and the drive wheel. Conversely, when the brake cable is released, it drives the pull rod 316 and the rotating shaft 314 to rotate, decreasing the distance between the two first ends of the two drum brake pads and thus reducing the friction between the two drum brake pads and the drive wheel 311.

[0048] In one embodiment, such as Figure 3 As shown, the portion of the rotating shaft 314 sandwiched between the drum brake pads 3131 and 3132 can have different dimensions in different directions. When installing the rotating shaft 314 and the cable rod 316, the brake cable in its released state can be fixedly connected to the cable rod 316, and the two surfaces of the rotating shaft 314 perpendicular to the smaller dimension can be in contact with the two first ends. Thus, when the brake cable is tightened, rotating the rotating shaft 314 increases the distance between the two first ends.

[0049] This embodiment of the invention, by employing the aforementioned structure of drum brake pads, rotating shaft, and cable rod, enables braking of the drive wheels in a confined space. This effectively reduces the space required for a drive system with braking functionality, facilitating the miniaturization and flattening of the test vehicle.

[0050] The following will combine Figures 4-7 The drive system of the vehicle provided in this disclosure will be described in detail.

[0051] Figure 4 This is a schematic diagram of the structure of a vehicle drive unit according to an embodiment of the present disclosure.

[0052] According to embodiments of this disclosure, such as Figure 4 As shown, in this embodiment, the vehicle's drive unit 420 may include a motor 421, a power transmission assembly 422, a first mounting plate 423, and a shock absorption assembly 424.

[0053] According to embodiments of this disclosure, motor 421 may be, for example, a drive motor. Specifically, motor 421 may be a permanent magnet DC servo motor, a permanent magnet wound-rotor DC motor, or a permanent magnet brushless DC servo motor, etc. Depending on actual needs, motor 421 may be any type of motor.

[0054] According to an embodiment of this disclosure, the power transmission component 422 is connected to the output shaft of the motor, i.e., the wheel of the vehicle, and the power transmission component 422 can transmit the power provided by the motor to the wheel to drive the wheel to rotate.

[0055] In one embodiment, the power transmission assembly 422 may include a coupling whose two ends are respectively connected to the output shaft of the motor and the hub of the wheel (e.g., the hub included in the drive wheel device described above).

[0056] In another embodiment, the power transmission assembly 422 may employ a structure combining synchronous pulleys and a drive belt. In this embodiment, there should be at least two synchronous pulleys, with one pulley connected to the output shaft of the motor and the other connected to the hub of a wheel. The at least two synchronous pulleys rotate approximately synchronously under the transmission action of the synchronous belt. It is understood that... Figure 4 The power transmission assembly 422 is represented by a structure combining a synchronous pulley and a drive belt, but the structure of the power transmission assembly 422 is only an example to facilitate understanding of this disclosure, and this disclosure does not limit it.

[0057] According to embodiments of this disclosure, the first mounting plate 423 can be used to mount the motor 421 onto the vehicle frame. For example, the vehicle frame can be the fuselage frame described above. Specifically, the motor 421 can be mounted at the motor mounting position on the fuselage frame via the first mounting plate 423. The first mounting plate 423 can be connected to the reinforcing ribs of the fuselage frame, for example, using fasteners such as screws and nuts.

[0058] According to embodiments of this disclosure, such as Figure 4As shown, the shock absorption assembly 424 may include, for example, a rotating shaft 4241 fixedly connected to the first mounting plate 423 and a rotating arm 4242 connected to the rotating shaft 4241. The rotating arm 4242 can rotate about the rotating shaft 4241.

[0059] The extension direction of the rotating shaft 4241 can be perpendicular to the direction in which the power transmission assembly 422 drives the wheel to rotate. Thus, when the wheel bounces up and down due to uneven road surfaces, since the first mounting plate 423 is connected to the frame and the drive shaft 4241 is connected to the first mounting plate 423, the rotation of the rotating arm 4242 relative to the rotating shaft 4241 can reduce the vibration of the frame caused by the wheel. In other words, the drive device of this embodiment can reduce the degree of vehicle body vibration caused by uneven road surfaces during vehicle operation, thereby providing a shock absorption effect.

[0060] The following will combine Figure 5 The structure of the power transmission component in one embodiment of the vehicle drive system provided in this disclosure will be described in detail.

[0061] Figure 5 This is a schematic diagram of the structure of a power transmission assembly according to an embodiment of the present disclosure.

[0062] like Figure 5 As shown, the power transmission component 522 in this embodiment may include two synchronous pulleys 5221 and 5222 and a conveyor belt 5223.

[0063] Synchronous pulleys 5221 and 5222 are arranged horizontally in a direction perpendicular to the output shaft of the motor. Synchronous pulley 5221 is connected to the output shaft of the motor, and synchronous pulley 5222 is connected to the wheel. Specifically, synchronous pulley 5222 can be connected to the hub of the wheel.

[0064] In one embodiment, the synchronizing pulley 5222 can be connected to the wheel hub via a transmission bearing 5224, thereby increasing connection stability, reducing the coefficient of friction during transmission, and ensuring rotational accuracy. Specifically, the axle of the synchronizing pulley 5222 is connected to the transmission bearing, and the wheel hub is fitted onto the transmission bearing, thus realizing the connection between the synchronizing pulley 5222 and the wheel.

[0065] According to an embodiment of this disclosure, the conveyor belt 5223 can be fitted onto two synchronous pulleys 5221 and 5222. Thus, when the synchronous pulley 5221 rotates under the drive of the motor's output shaft, the friction between the conveyor belt 5223 and the synchronous pulley allows the synchronous pulley 5221 to drive the synchronous pulley 5222 to rotate via the conveyor belt 5223, thereby causing the synchronous pulley 5222 to drive the wheel to rotate.

[0066] According to embodiments of this disclosure, such as Figure 5 As shown, in this embodiment, the vehicle's drive unit may further include a second mounting plate, which may include mounting plate 5251 and mounting plate 5252. Mounting plate 5252 is disposed near the motor, and mounting plate 5251 is disposed near the shock absorber assembly and the wheel. A power transmission assembly 522 is sandwiched between mounting plate 5251 and mounting plate 5252. Mounting plates 5251 and 5252 may be provided with positioning holes for positioning the installation positions of transmission bearings, connectors, etc. Mounting plates 5251 and 5252 may be connected via multiple connectors 526, thus securely clamping the power transmission assembly 522 between the two mounting plates. The connectors 526 may be, for example, bushings, etc., and this disclosure is not limited thereto.

[0067] According to embodiments of this disclosure, such as Figure 5 As shown, the vehicle's drive unit may also include a brake cable retainer 527 for securing the brake cable connected to the previously described cable tie, thereby preventing additional friction to power transmission caused by tangled brake cable wiring. The brake cable retainer 527 can be mounted on a mounting plate 5251, for example, and this mounting position should ensure that it does not contact the drive belt. Through the brake cable retainer 527, the brake cable can be routed close to the mounting plate 5251, preventing contact between the brake cable and the timing pulley or drive belt.

[0068] The following will combine Figure 6 The structure of the shock absorber assembly in one embodiment of the vehicle drive system provided in this disclosure will be described in detail.

[0069] Figure 6 This is a structural schematic diagram of a shock-absorbing assembly according to an embodiment of the present disclosure.

[0070] According to embodiments of this disclosure, an elastic element can be used as the rotating arm to further improve the shock absorption effect.

[0071] For example, such as Figure 6 As shown, in this embodiment 600, the rotating arm may include an elastic element such as a spring 62421. The rotating shaft may include two shafts, namely shaft 62411 and shaft 62412, which are located at different positions in a direction perpendicular to the output shaft of the motor. The two ends of the elastic element are respectively connected to the two shafts and can rotate around the two shafts. For example, shaft 62411 and shaft 62412 can both be fixedly connected to the first mounting plate. In this way, when the wheel bounces up and down, the elastic element can be compressed or stretched by rotating around the two shafts, increasing the force applied by the shock absorption assembly to the vehicle frame and improving the shock absorption effect. At the same time, after the wheel stops bouncing, the distance between the frame and the wheel can be restored to the value before the bounce under the action of the elastic force of the elastic element, which facilitates shock absorption during subsequent driving.

[0072] In one embodiment, if the power transmission assembly includes two synchronous pulleys, shaft 62411 can be located near the synchronous pulley connected to the wheel, and shaft 62412 can be located near the synchronous pulley connected to the output shaft of the motor. When the power transmission assembly is connected to the wheel, the shaft closer to the wheel is positioned lower than the shaft further away from the wheel. Thus, when the wheel moves to the bulge on the ground, the end of the elastic member near the wheel is raised, allowing both ends of the elastic member to rotate along the two shafts, compressing the elastic member and shortening its length. During the rotation of the elastic member around shaft 62412, the force applied by the elastic member to shaft 62412 includes a force perpendicular to the ground downwards. This downward force can be applied to the frame via the first mounting plate, thereby providing resistance to the frame's movement with the wheel, reducing the degree of frame sway, and achieving shock absorption. Conversely, when the wheel moves to the depression in the ground, the elastic element is stretched. During the rotation of the elastic element around the shaft 62412, the force applied by the elastic element to the shaft 62412 includes a force perpendicular to the ground. This force perpendicular to the ground can be applied to the frame via the first mounting plate, thereby providing resistance to the frame as the wheel bounces, reducing the degree of frame bounce, and achieving shock absorption.

[0073] In one embodiment, the elastic element may have annular hook-shaped structures at both ends, and the elastic element is connected to the two shafts via these annular hook-shaped structures. Alternatively, the elastic element may be sleeved on two connecting rods, i.e., the rotating arm also includes the two connecting rods 62422 and 62423. These two connecting rods are hollow structures, and the outer diameter of one connecting rod 62422 matches the inner diameter of the other connecting rod 62423. One end of the other connecting rod 62423 is sleeved on the outside of one connecting rod 62422, and the other end of both connecting rods has a through hole perpendicular to the length direction of the connecting rod, for insertion into one of the two shafts respectively. Thus, during the rotation of the rotating arm around the two shafts, the overlapping area of ​​the two connecting rods increases or decreases, thereby lengthening or compressing the elastic element.

[0074] In one embodiment, such as Figure 6 As shown, the vehicle's drive unit may further include a second mounting plate, which comprises two plates, the length of which is greater than or equal to the length of the power transmission assembly. One of the two plates, plate 6252, is positioned close to the motor and has a through hole for the motor's output shaft to pass through. Plate 6251 of the two plates is connected to the wheel hub, thereby clamping the power transmission assembly between the two plates. This ensures a secure connection between the vehicle's drive unit and the vehicle frame.

[0075] In one embodiment, such as Figure 6As shown, the shock-absorbing assembly of this embodiment may include a fixing member in addition to the elastic element. The fixing member may include a first fixing plate 62431 fixedly connected to and perpendicular to the first mounting plate 623, and two second fixing plates 62432 arranged parallel to the first fixing plate and along the output shaft direction of the motor. Both second fixing plates 62432 are connected to the first fixing plate. The rotating shaft, including the shaft 62412, may be sandwiched between the two second fixing plates. The rotating shaft, including the shaft 62411, is fixedly connected to the plate 6251. For example, the shock-absorbing assembly may also include a support member, through which the shaft 62411 can be fixedly connected to the plate 6251.

[0076] This embodiment, by configuring a shock-absorbing assembly with a first fixed plate and a second fixed plate, can improve the stability of the shock-absorbing assembly. Compared to fixing both shafts to the first mounting plate, it can increase the degree to which the elastic element is compressed or stretched when the wheel bumps. This is because the position of shaft 62411 is affected by the wheel, and the position of shaft 62412 is affected by the vehicle frame. In this way, the shock absorption effect can be effectively improved.

[0077] According to embodiments of this disclosure, the vehicle's drive unit may also be equipped with a cooling fan to dissipate heat from the motor, thereby improving the service life and operational stability of the vehicle's drive unit.

[0078] Figure 7 This is a schematic diagram of the structure of a vehicle drive unit according to another embodiment of the present disclosure.

[0079] like Figure 7 As shown, in this embodiment, the vehicle drive unit 720 includes a motor 721, a power transmission component 722, a first mounting plate 723, and a shock absorption component 724, as well as a cooling fan 728 and a fan mounting bracket 729.

[0080] The cooling fan 728 and the wheel assembly 710 can be located on different sides of the motor 721. That is, the cooling fan is located on the side of the motor 721 away from the wheel. The cooling fan 728 can be located close to the motor 721 to improve heat dissipation efficiency.

[0081] The fan mounting bracket 729 can be used to mount the cooling fan 728 onto the vehicle frame. The fan mounting bracket 729 can also be fixedly connected to the first mounting plate 723, and the area of ​​the fan mounting bracket 729 near the motor 721 can also be provided with a heat sink, for example, to improve heat dissipation efficiency and heat dissipation uniformity.

[0082] For example, the number of cooling fans 728 can be selected according to actual needs. The cooling fans 728 can use air cooling or liquid cooling, and the type of cooling fan can be selected according to actual needs. This disclosure does not limit this.

[0083] The following will combine Figures 5-7 The structure of the vehicle drive unit provided in this disclosure is described in its entirety.

[0084] Figure 8 This is an exploded view of the structure of a vehicle drive unit according to an embodiment of the present disclosure.

[0085] like Figure 8 As shown, in this embodiment, the vehicle drive unit 820 includes a motor 821, a power transmission component, a first mounting plate 823, a shock absorption component, a second mounting plate, a connector 826, a brake cable fixing clip 827, a cooling fan 828, and a fan mounting bracket 829.

[0086] The first mounting plate 823 is used to fix the motor 821 to the vehicle frame. The first mounting plate 823 is disposed between the motor 821 and the power transmission assembly. The first mounting plate 823 may have a through hole through which the output shaft of the motor 821 can pass and connect to the power transmission assembly.

[0087] The power transmission assembly may include a timing pulley 8221, a timing pulley 8222, and a conveyor belt 8223. The timing pulley 8221 is connected to the output shaft of the motor 821, and the timing pulley 8222 can be connected to the wheel hub in the wheel assembly via a transmission bearing. The conveyor belt 8223 is fitted onto the two timing pulleys. For example, the second mounting plate includes plates 8251 and 8252, with the power transmission assembly 821 sandwiched between plates 8251 and 8252, and plates 8251 and 8252 fixedly connected via a connector 826.

[0088] The damping assembly may include a shaft 8241, a rotating arm 8242, and a fixing member. Shaft 8241 may include a first shaft connected to a first mounting plate 823 and a second shaft connected to a second mounting plate. The rotating arm 8242 may include a spring and two connecting rods connected to both ends of the spring. One of the connecting rods is rotatably connected to the first shaft, and the other connecting rod is rotatably connected to the second shaft. The fixing member includes a first fixing plate 82431 fixedly connected to the first mounting plate 823 and two second fixing plates 82432. The first fixing plate 82431 is perpendicular to the first mounting plate 823, and the two second fixing plates 82431 are fixedly connected to and perpendicular to the first fixing plate 82431. The first shaft connected to the first mounting plate 823 is fixed between the two second fixing plates.

[0089] The brake cable retaining clip 827 is fixedly connected to the second mounting plate. This embodiment does not limit the location of the brake cable retaining clip 827.

[0090] The cooling fan 828 and the fan mounting bracket 829 are located on the side of the motor 821 away from the wheel assembly. The fan mounting bracket 829 is used to fix the cooling fan 828 to the vehicle frame.

[0091] The drive unit in this embodiment effectively reduces vehicle shock. Therefore, it improves the user experience of vehicles equipped with this drive unit and extends vehicle lifespan. Specifically, the drive unit in this embodiment can drive the vehicle's power drive wheels, with each drive unit driving one power drive wheel. This ensures that even when a vehicle has multiple power drive wheels, the vehicle will not become immobile due to the failure of a single drive unit.

[0092] It should be noted that the acquisition, collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in the technical solution disclosed herein all comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0093] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A driving device of a vehicle, comprising: a motor; a power transmission assembly, comprising two synchronous wheels and a transmission belt sleeved on the two synchronous wheels, one of the two synchronous wheels being connected with an output shaft of the motor, the other of the two synchronous wheels being connected with a hub of a wheel for transmitting power provided by the motor to the wheel to drive the wheel to rotate; a first mounting plate configured to mount the motor on a frame of the vehicle; a second mounting plate, comprising a first plate and a second plate, a through hole of the first plate penetrating the output shaft of the motor, the second plate being connected with the hub of the wheel, the power transmission assembly being clamped between the first plate and the second plate; and a damping assembly, comprising a rotating shaft, a rotating arm connected with the rotating shaft and a fixing member, the fixing member having a first fixing plate fixed perpendicularly to the first mounting plate and two second fixing plates perpendicularly to the first fixing plate and arranged along the direction of the output shaft of the motor, wherein the rotating shaft comprises a first shaft clamped between the two second fixing plates and a second shaft fixedly connected with the second plate in the second mounting plate via a support member, the rotating arm comprising an elastic member and two connecting rods respectively connected with two ends of the elastic member, the two ends of the elastic member being connected with the first shaft and the second shaft respectively, the elastic member being sleeved on the two connecting rods in a hollow structure, one end of one of the two connecting rods being sleeved outside the other connecting rod to form an extensible structure, and the other ends of the two connecting rods each having a through hole perpendicular to the length direction of the connecting rod for penetrating the first shaft and the second shaft respectively to be rotationally connected, the extension direction of the rotating shaft being perpendicular to the direction in which the power transmission assembly drives the wheel to rotate, the extension direction of the elastic member being consistent with the extension direction of the extensible structure. The power transmission assembly is configured to rotate the one synchronous wheel under the drive of the motor, drive the other synchronous wheel to rotate via the transmission belt to drive the wheel to rotate.

2. The apparatus of claim 1, wherein, The power transmission assembly further comprises:

3. The apparatus of claim 2, wherein, a transmission bearing connected with the axle of the other synchronous wheel, the transmission bearing being configured to be sleeved by the hub of the wheel. The setting position of one of the two shafts close to the wheel is lower than the setting position of the other of the two shafts away from the wheel.

4. The apparatus of claim 1 or 2, wherein, 5. The device according to claim 1, further comprising: a support bearing for connecting a second one of the two second fixing plates close to the second mounting plate with the second mounting plate.

6. The device according to claim 1, further comprising: a heat dissipation fan arranged on the side of the motor away from the wheel; and a fan fixing frame configured to mount the heat dissipation fan on the frame.

7. A driving system of a vehicle, comprising: a driving wheel device, comprising a hub and a driving wheel; and a driving device connected with the hub of the driving wheel device. ​ ​ ​ The driving device is a driving device of a vehicle according to any one of claims 1-6.

8. The system of claim 7, wherein, The driving wheel device further comprises: two drum brake pads, oppositely arranged between the driving wheel and the hub, the hub being clamped in a space surrounded by the two drum brake pads; a rotating shaft clamped between two first ends of the two drum brake pads close to each other; a fixed shaft clamped between two second ends of the two drum brake pads close to each other; and a pull rod fixedly connected with the rotating shaft and fixedly connected with a brake wire of the vehicle, wherein each driving wheel device is configured to, in the case that the brake wire is pulled tight / released, the brake wire driving the pull rod and the rotating shaft to rotate, so that the distance between the two first ends increases / decreases, and the friction between the two drum brake pads and the driving wheel increases / decreases.

9. A vehicle comprising: At least one driving system of a vehicle according to any one of claims 7-8.

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