Speed reduction transmission system, vehicle driving assembly and vehicle with same

Abstract

The utility model discloses a speed-reducing transmission system, a vehicle driving assembly and a vehicle with the vehicle driving assembly. The speed-reducing transmission system comprises a shell, a driving assembly and a transmission assembly, the motor is arranged in the shell, and the motor is provided with an output shaft; the double-row planetary gear device is arranged in the shell and comprises a first gear train and a second gear train, the first gear train and the second gear train are arranged and connected in the axial direction of the motor, and the input end of one of the first gear train and the second gear train is connected with the output shaft; the input end of the parallel shaft gear speed reducer is connected with the output end of at least one of the first gear train and the second gear train, and the output end of the parallel shaft gear speed reducer is connected with wheels. According to the speed reduction transmission system, through transmission of the double-row planetary gear device and the parallel shaft gear speed reduction device, the large transmission ratio can be achieved, the speed reduction and torque increasing effects of the speed reduction transmission system are improved, the starting acceleration of the vehicle is increased, and the dynamic property of the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a speed reduction transmission system, a vehicle drive assembly and a vehicle having the same. Background Art

[0002] At present, the more mature and widely used electric drive assemblies in the domestic and foreign markets are single-motor or dual-motor centralized drive solutions. Usually, a single motor or a dual motor is used for secondary speed reduction or multi-gear transmission, and finally the power is converged through a differential to centrally drive the two wheels on both sides. However, with the rapid development of vehicle technology, the speed reduction and torque increase effect of the differential in the prior art has gradually been unable to meet the market demand. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a speed reduction transmission system, which can achieve a large transmission ratio, improve the speed reduction and torque increase effect of the speed reduction transmission system, improve the starting acceleration of the vehicle, and enhance the power performance of the vehicle.

[0004] The utility model also provides a vehicle drive assembly, which includes the above-mentioned speed reduction transmission system.

[0005] The utility model further provides a vehicle, which includes the above-mentioned vehicle drive assembly.

[0006] The speed reduction transmission system according to an embodiment of the utility model includes: a housing; a motor disposed in the housing, the motor having an output shaft; a double-row planetary gear device disposed in the housing and including a first gear train and a second gear train, the first gear train and the second gear train are arranged and connected in the axial direction of the motor, and an input end of one of the first gear train and the second gear train is connected to the output shaft; a parallel-axis gear reduction device, an input end of the parallel-axis gear reduction device is connected to an output end of at least one of the first gear train and the second gear train, and an output end of the parallel-axis gear reduction device is connected to a wheel.

[0007] According to the reduction drive system of the embodiment of the present utility model, the double-row planetary gear device includes a first gear train and a second gear train. The first gear train and the second gear train are arranged and connected in the axial direction of the motor. The input end of one of the first gear train and the second gear train is connected to the output shaft. The input end of the parallel-axis gear reduction device is connected to the output end of at least one of the first gear train and the second gear train. The output end of the parallel-axis gear reduction device is connected to the wheel. Through the transmission of the double-row planetary gear device and the parallel-axis gear reduction device, a large transmission ratio can be achieved, the speed reduction and torque increase effect of the reduction drive system can be improved, the starting acceleration of the vehicle can be increased, and the power performance of the vehicle can be enhanced.

[0008] In addition, the reduction drive system according to the present utility model may further have the following additional technical features:

[0009] In some embodiments, the first gear train includes: a first ring gear, the first ring gear is connected to the input end of the parallel-axis gear reduction device; a first sun gear, the first sun gear is disposed inside the first ring gear and spaced apart, the first sun gear is connected to the output shaft; a plurality of first planet gears, the first planet gears are engaged between the first ring gear and the first sun gear, and the plurality of first planet gears are spaced apart along the circumferential direction of the first sun gear; a first planet carrier, the plurality of first planet gears are rotatably disposed on the first planet carrier. The second gear train includes: a second ring gear, the second ring gear is connected to the first planet carrier and rotates synchronously; a second sun gear, the second sun gear is disposed inside the second ring gear and spaced apart, the second sun gear is fixed to the housing; a plurality of second planet gears, the second planet gears are engaged between the second ring gear and the second sun gear, and the plurality of second planet gears are spaced apart along the circumferential direction of the second sun gear; a second planet carrier, the plurality of second planet gears are rotatably disposed on the second planet carrier, and the second planet carrier is connected to the first ring gear and rotates synchronously.

[0010] In some embodiments, the second gear train is located on the side of the first gear train closer to the wheel.

[0011] In some embodiments, the parallel-axis gear reduction device includes: a first gear, the first gear is connected to the output end of the double-row planetary gear device; a second gear, the second gear is engaged with the first gear; a drive shaft, the drive shaft is used to connect the second gear and the wheel.

[0012] In some embodiments, the parallel-axis gear reduction device further includes: an intermediate shaft disposed on the second gear and rotating synchronously with the second gear; a third gear connected to the intermediate shaft and rotating synchronously with the intermediate shaft; and a fourth gear meshing with the third gear and connected to the end of the drive shaft facing away from the wheel.

[0013] In some embodiments, the drive shaft is parallel or coaxial with the output shaft.

[0014] In some embodiments, the motor includes a stator and a rotor. The rotor is rotatable within the stator. The output shaft is disposed on the rotor, and at least a part of the double-row planetary gear device is located within the rotor.

[0015] The vehicle drive assembly according to an embodiment of the present invention includes: the above-described reduction and transmission system, with two such reduction and transmission systems; a motor controller electrically connected to the motors of the two reduction and transmission systems simultaneously; and two wheels. The two wheels are disposed opposite to each other in the left-right direction of the vehicle and are respectively connected to the output ends of the parallel-axis gear reduction devices of the two reduction and transmission systems.

[0016] For the vehicle drive assembly according to an embodiment of the present invention, by providing the above-described reduction and transmission system, since the double-row planetary gear device includes a first gear train and a second gear train, the first gear train and the second gear train are arranged and connected in the axial direction of the motor. The input end of one of the first gear train and the second gear train is connected to the output shaft, the input end of the parallel-axis gear reduction device is connected to the output end of at least one of the first gear train and the second gear train, and the output end of the parallel-axis gear reduction device is connected to the wheel. Through the transmission of the double-row planetary gear device and the parallel-axis gear reduction device, a large transmission ratio can be achieved, the speed reduction and torque increase effect of the reduction and transmission system can be improved, the starting acceleration of the vehicle can be increased, and the power performance of the vehicle can be enhanced.

[0017] In addition, the vehicle drive assembly according to the present invention may further have the following additional technical features:

[0018] In some embodiments, the two reduction and transmission systems are symmetrically disposed along the central axis of the vehicle extending in the front-rear direction.

[0019] The present invention also provides a vehicle having the above embodiments.

[0020] According to the vehicle of the embodiment of the present utility model, by providing the above-mentioned vehicle drive assembly, the double-row planetary gear device includes a first gear train and a second gear train. The first gear train and the second gear train are arranged and connected in the axial direction of the motor. The input end of one of the first gear train and the second gear train is connected to the output shaft. The input end of the parallel-axis gear reduction device is connected to the output end of at least one of the first gear train and the second gear train. The output end of the parallel-axis gear reduction device is connected to the wheel. Through the transmission of the double-row planetary gear device and the parallel-axis gear reduction device, a large transmission ratio can be achieved, the speed reduction and torque increase effect of the speed reduction transmission system can be improved, the starting acceleration of the vehicle can be increased, and the power performance of the vehicle can be enhanced.

[0021] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 is a schematic structural diagram of a vehicle drive assembly according to the first embodiment of the present utility model;

[0024] Figure 2 is a schematic structural diagram of a vehicle drive assembly according to the second embodiment of the present utility model;

[0025] Figure 3 is a schematic structural diagram of a vehicle drive assembly according to the third embodiment of the present utility model;

[0026] Figure 4 is a schematic structural diagram of a part of a speed reduction transmission system according to the embodiment of the present utility model.

[0027] REFERENCE NUMERALS:

[0028] 100, vehicle drive assembly;

[0029] 10, speed reduction transmission system;

[0030] 1, housing;

[0031] 2, motor; 21, stator; 22, rotor; 221, output shaft;

[0032] 3, double-row planetary gear device; 31, first gear train; 311, first ring gear; 312, first sun gear; 313, first planet gear; 314, first planet carrier; 32, second gear train; 321, second ring gear; 322, second sun gear; 323, second planet gear; 324, second planet carrier;

[0033] 4. Parallel shaft gear reduction device; 41. First gear; 42. Second gear; 43. Driving shaft; 44. Intermediate shaft; 45. Third gear; 46. Fourth gear; 47. Connecting shaft;

[0034] 20. Motor controller;

[0035] 30. Wheel. Detailed implementation manner

[0036] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0039] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] The reduction drive system 10 according to an embodiment of the present utility model will be described below with reference to the drawings.

[0041] As Figure 1 shown, the speed reduction transmission system 10 according to an embodiment of the present utility model includes a housing 1, a motor 2, a double-row planetary gear device 3, and a parallel-axis gear reduction device 4.

[0042] Specifically, referring to the attached Figure 1 figure, the housing 1 can protect the internal structure of the housing 1, prevent the internal structure from being exposed and damaged, and ensure the service life of the speed reduction transmission system 10. The motor 2 is disposed in the housing 1. The motor 2 has an output shaft 221. The double-row planetary gear device 3 is disposed in the housing 1 and includes a first gear train 31 and a second gear train 32. The first gear train 31 and the second gear train 32 are arranged and connected in the axial direction of the motor 2 (the left-right direction shown in the attached Figure 1 figure). The input end of one of the first gear train 31 and the second gear train 32 is connected to the output shaft 221.

[0043] Compared with the single-row planetary gear device in the prior art, the double-row planetary gear device 3 has high precision, a compact structure, good reversibility, high transmission efficiency, and small power loss. The double-row planetary gear device 3 has relatively more planetary gears, a wider range of transmission ratios, can achieve a higher transmission ratio, and can transmit a larger torque under the same volume.

[0044] Furthermore, referring to the attached Figure 1 figure, the input end of the parallel-axis gear reduction device 4 is connected to the output end of at least one of the first gear train 31 and the second gear train 32. The output end of the parallel-axis gear reduction device 4 is connected to the wheel 30. The rotational speed of the output end of the double-row planetary gear device 3 decreases and the torque increases after passing through the parallel-axis gear reduction device 4, improving the speed reduction and torque increase effect of the speed reduction transmission system 10, increasing the starting acceleration of the vehicle, and enhancing the power performance of the vehicle. Moreover, the increase in the reduction ratio can relatively reduce the performance requirements for the motor 2, thereby reducing the size of the motor 2, shrinking the volume of the motor 2, reducing the weight of the motor 2, making the motor 2 high-speed and miniaturized, improving the electric drive power density, and reducing the production and processing cost of the speed reduction transmission system 10. It should be noted that the parallel-axis gear reduction device 4 has a short transmission chain and high transmission efficiency. Since the two adjacent shafts of the parallel-axis gear reduction device 4 are parallel and the force is evenly distributed, the parallel-axis gear reduction device 4 can withstand a large torque and axial force, ensuring the reliability of the speed reduction transmission system 10.

[0045] It can be understood that when the motor 2 starts, since the input end of one of the first gear train 31 and the second gear train 32 is connected to the output shaft 221 of the motor 2, and the first gear train 31 and the second gear train 32 are connected, the output shaft 221 drives the double-row planetary gear device 3 to operate. Since the input end of the parallel-axis gear reduction device 4 is connected to the output end of at least one of the first gear train 31 and the second gear train 32, the torque of the double-row planetary gear device 3 is transmitted to the input end of the parallel-axis gear reduction device 4, driving the parallel-axis gear reduction device 4 to operate, and then driving the wheel 30 to rotate, realizing the normal advancement of the vehicle.

[0046] For the reduction drive system 10 according to an embodiment of the present invention, the double-row planetary gear device 3 includes a first gear train 31 and a second gear train 32. The first gear train 31 and the second gear train 32 are arranged and connected in the axial direction of the motor 2. The input end of one of the first gear train 31 and the second gear train 32 is connected to the output shaft 221. The input end of the parallel-axis gear reduction device 4 is connected to the output end of at least one of the first gear train 31 and the second gear train 32. The output end of the parallel-axis gear reduction device 4 is connected to the wheel 30. Through the transmission of the double-row planetary gear device 3 and the parallel-axis gear reduction device 4, a large transmission ratio can be achieved, the speed reduction and torque increase effect of the reduction drive system 10 can be improved, the starting acceleration of the vehicle can be increased, and the power performance of the vehicle can be enhanced.

[0047] In some embodiments of the present invention, referring to the attached Figure 4 As shown, the first gear train 31 includes a first ring gear 311, a first sun gear 312, a plurality of first planet gears 313, and a first planet carrier 314. The first ring gear 311 is connected to the input end of the parallel-axis gear reduction device 4. The first sun gear 312 is disposed inside the first ring gear 311 and spaced apart. The first sun gear 312 is connected to the output shaft 221. The first planet gears 313 are engaged between the first ring gear 311 and the first sun gear 312. The plurality of first planet gears 313 are spaced apart along the circumferential direction of the first sun gear 312. The plurality of first planet gears 313 are rotatably disposed on the first planet carrier 314. For example, the first planet gears 313 can be two, three, four, or five spaced apart along the circumferential direction of the first sun gear 312. The arrangement of the plurality of first planet gears 313 can disperse the torque, achieve a larger proportion of torque transmission, improve the balance of the first gear train 31, reduce the wear and stress between the first planet gears 313 and the first sun gear 312, improve the operating stability of the first gear train 31, and improve the service life of the double-row planetary gear device 3.

[0048] Furthermore, referring to the attached Figure 4As shown, the second gear train 32 includes a second ring gear 321, a second sun gear 322, a plurality of second planet gears 323 and a second planet carrier 324. The second ring gear 321 is connected to the first planet carrier 314 and rotates synchronously therewith. The second sun gear 322 is disposed inside the second ring gear 321 and spaced apart. The second sun gear 322 is fixed to the housing 1. The second planet gears 323 are meshed between the second ring gear 321 and the second sun gear 322. The plurality of second planet gears 323 are spaced apart along the circumferential direction of the second sun gear 322. The plurality of second planet gears 323 are rotatably disposed on the second planet carrier 324. The second planet carrier 324 is connected to the first ring gear 311 and rotates synchronously therewith. For example, the second planet gears 323 can be two, three, four or five spaced apart along the circumferential direction of the second sun gear 322. The arrangement of the plurality of second planet gears 323 can disperse the torque, achieve a greater proportion of torque transmission, improve the balance of the second gear train 32, reduce the wear and stress between the second planet gears 323 and the second sun gear 322, improve the running stability of the second gear train 32, and improve the service life of the double-row planetary gear device 3.

[0049] It can be understood that, referring to the attached Figure 4 As shown, when the motor 2 starts, the first sun gear 312 rotates under the drive of the output shaft 221. The plurality of first planet gears 313 are all meshed with the first sun gear 312. Driven by the first sun gear 312, the plurality of first planet gears 313 rotate around the first sun gear 312 while rotating on their own axes. Since the first planet gears 313 are meshed with the first ring gear 311, the first ring gear 311 rotates. The second planet carrier 324 is connected to the first ring gear 311 and rotates synchronously therewith. Since the first planet carrier 314 passes through the plurality of first planet gears 313, the rotation of the first planet gears 313 around the first sun gear 312 causes the first planet carrier 314 to rotate together. The second ring gear 321 is connected to the first planet carrier 314 and rotates synchronously therewith. Since the second sun gear 322 is fixed, the second planet gears 323 are meshed between the second sun gear 322 and the second ring gear 321, causing the second planet gears 323 to rotate on their own axes and around the second sun gear 322 under the drive of the second ring gear 321. The second planet carrier 324 passes through the plurality of second planet gears 323 and is connected to the first ring gear 311, and finally converges at the output end of the double-row planetary gear device 3, transmits the torque to the parallel-axis gear reduction device 4, and finally drives the wheel 30 to rotate, realizing the normal progress of the vehicle.

[0050] It can be understood that the first gear train 31 and the second gear train 32 together form the double-row planetary gear device 3. By increasing the number and complexity of the planet gears, a higher transmission ratio, torque density and transmission efficiency can be achieved, further improving the effect of reducing speed and increasing torque of the reduction transmission system 10.

[0051] It should be noted that, asFigure 4 As shown, the second sun gear 322 is fixed to the housing 1, so that the second sun gear 322 is fixed and cannot rotate, ensuring that the rotational speed of the output end of the double-row planetary gear device 3 is fixed.

[0052] In some embodiments of the present invention, referring to the attached Figure 1 As shown, the second gear train 32 is located on the side of the first gear train 31 close to the wheel 30, which is convenient for arranging and connecting the first gear train 31 and the second gear train 32 in the axial direction of the motor 2, so that the input end of the first gear train 31 is connected to the output shaft 221 of the motor 2, and the output ends of the first gear train 31 and the second gear train 32 are connected to the input end of the parallel-axis gear reduction device 4, thereby ensuring the drive of the double-row planetary gear device 3 for the parallel-axis gear reduction device 4, ensuring that the parallel-axis gear reduction device 4 drives the wheel 30 to rotate, and thus ensuring the normal progress of the vehicle.

[0053] In some embodiments of the present invention, referring to the attached Figure 1 and the attached Figure 3 As shown, the parallel-axis gear reduction device 4 includes a first gear 41, a second gear 42 and a drive shaft 43. The first gear 41 is connected to the output end of the double-row planetary gear device 3, and the first gear 41 and the double-row planetary gear device 3 are connected by a connecting shaft 47 to achieve synchronous rotation of the first gear 41 and the output end of the double-row planetary gear device 3. The second gear 42 meshes with the first gear 41, and the drive shaft 43 is used to connect the second gear 42 and the wheel 30. It can be understood that when the output end of the double-row planetary gear device 3 rotates, the connecting shaft 47 drives the first gear 41 to rotate, the second gear 42 meshes with the first gear 41 and rotates together under the drive of the first gear 41, and then the torque is transmitted to the drive shaft 43 to drive the wheel 30 to rotate, realizing the normal progress of the vehicle. In this process, the rotational speed of the output end of the double-row planetary gear device 3 is reduced, and at the same time, the torque of the drive shaft 43 is increased, realizing the functions of speed reduction and torque increase of the parallel-axis gear reduction device 4.

[0054] In a further embodiment of the present invention, referring to the attached Figure 1 and the attached Figure 2 As shown, the parallel-axis gear reduction device 4 further includes an intermediate shaft 44, a third gear 45, and a fourth gear 46. The intermediate shaft 44 is arranged on the second gear 42 and rotates synchronously with the second gear 42. The third gear 45 is connected to the intermediate shaft 44 and rotates synchronously with the intermediate shaft 44. The fourth gear 46 meshes with the third gear 45, and the fourth gear 46 is connected to the end of the drive shaft 43 facing away from the wheel 30. It can be understood that when the output end of the double-row planetary gear device 3 rotates, it drives the first gear 41 to rotate, the second gear 42 meshes with the first gear 41 and rotates together under the drive of the first gear 41. The length direction of the intermediate shaft 44 (refer to the attachedFigure 1 Both ends in the left - right direction (as shown) are fixedly connected to the second gear 42 and the third gear 45 respectively. Then, the third gear 45 is driven to rotate through the intermediate shaft 44. The fourth gear 46 meshes with the third gear 45 and rotates together under the drive of the third gear 45. Finally, the torque is transmitted to the drive shaft 43, driving the wheel 30 to rotate and realizing the normal progress of the vehicle.

[0055] It should be noted that by combining the parallel - shaft gear reduction device 4 with the double - row planetary gear device 3, three - stage reduction can be achieved, thus achieving a larger transmission ratio, outputting a larger wheel - end torque, and further improving the vehicle power performance. At the same time, it can also reduce the requirements for the performance of the motor 2, reduce the size of the motor 2, relatively reduce the volume of the motor 2, reduce the weight of the motor 2, thereby improving the electric drive power density and reducing the cost of the reduction drive system 10.

[0056] It should be noted that as Figure 3 shown, when the parallel - shaft gear reduction device 4 only includes the first gear 41, the second gear 42 and the drive shaft 43, the size of the parallel - shaft gear reduction device 4 is smaller. Correspondingly, the occupied space of the reduction drive system 10 is smaller, which is convenient for assembling the reduction drive system 10 onto the vehicle; as Figure 1 and Figure 2 shown, when the parallel - shaft gear reduction device 4 includes the first gear 41, the second gear 42, the drive shaft 43, the intermediate shaft 44, the third gear 45 and the fourth gear 46, the effect of reducing speed and increasing torque of the parallel - shaft gear reduction device 4 is relatively better, which can achieve a larger transmission ratio, output a larger wheel - end torque, and improve the vehicle power performance.

[0057] In a further embodiment of the present utility model, the drive shaft 43 is parallel or coaxial with the output shaft 221. It can be understood that the drive shaft 43 and the output shaft 221 can be parallel. As Figure 2 shown, the output shaft 221 is coaxial with the connecting shaft 47, the connecting shaft 47 is parallel with the intermediate shaft 44, and the drive shaft 43 is parallel with the intermediate shaft 44. The structure is relatively simpler, which can reduce the manufacturing cost of the reduction drive system 10; the drive shaft 43 and the output shaft 221 can also be coaxial. As Figure 1 shown, the output shaft 221, the connecting shaft 47 and the drive shaft 43 are all coaxially arranged, and the intermediate shaft 44 is parallel to the connecting shaft 47 and the drive shaft 43. The structure is more compact, reducing the occupied space of the reduction drive system 10, which is convenient for assembling the reduction drive system 10 onto the vehicle.

[0058] In some embodiments of the present utility model, referring to Appendix Figure 1 and Appendix Figure 4As shown, the motor 2 includes a stator 21 and a rotor 22, the rotor 22 is rotatable in the stator 21, the output shaft 221 is arranged on the rotor 22, and at least part of the double-row planetary gear device 3 is located in the rotor 22, which can relatively reduce the size of the reduction transmission system 10 along the axial direction of the motor 2, making the structure of the reduction transmission system 10 more compact, reducing the occupied space of the reduction transmission system 10, improving the integration and platform degree of the reduction transmission system 10, and facilitating the assembly of the reduction transmission system 10 on the vehicle. It should be noted that only part of the double-row planetary gear device 3 can be located in the rotor 22, or all of the double-row planetary gear device 3 can be located in the rotor 22.

[0059] The present invention also provides a vehicle drive assembly 100 having the reduction transmission system 10 of the above embodiment.

[0060] like Figure 1 As shown, the vehicle drive assembly 100 according to the embodiment of the present invention includes the above-mentioned reduction transmission system 10 , a motor controller 20 and two wheels 30 .

[0061] Specifically, refer to the attached Figure 1 As shown, there are two reduction transmission systems 10, and the two reduction transmission systems 10 are arranged along the left and right directions of the vehicle (such as Figure 1 The motor controller 20 is arranged above or to the side of the reduction transmission system 10, and the motor controller 20 is electrically connected to the motors 2 of the two reduction transmission systems 10 at the same time. The two wheels 30 are arranged opposite to each other in the left and right directions of the vehicle and are respectively connected to the output ends of the parallel axis gear reduction devices 4 of the two reduction transmission systems 10. The speed and torque output of the motors 2 of the two reduction transmission systems 10 can be controlled by the motor controller 20, and the speed and torque output of the motors 2 are reduced and increased by the double-row planetary gear device 3 and the parallel axis gear reduction device 4, and then output to the wheels 30, thereby achieving the purpose of driving the vehicle.

[0062] It should be noted that by controlling the output speed and output torque of the motors 2 of the two reduction transmission systems 10 respectively through the motor controller 20, the vehicle's on-the-spot U-turn, differential control, escape driving, torque vector control, brake energy recovery and other functional requirements can be realized to meet different output conditions of the vehicle. For example, by controlling the motor 2 of the two reduction transmission systems 10 to have different speeds through the motor controller 20, differential control can be realized; by controlling the motor 2 of the two reduction transmission systems 10 to rotate forward and reverse through the motor controller 20, the two wheels 30 can move in opposite directions, realizing an on-the-spot U-turn.

[0063] In the prior art, usually a single motor or a dual motor is used for secondary deceleration or multi-speed transmission, and finally the power is converged and centrally drives the two wheels on both sides through a differential. This requires a relatively high performance for a single motor, and the driving of the left and right wheels cannot be decoupled, so electronic differential and torque vector control between the two wheels cannot be achieved. As a result, the power source end cannot control the output torque to adjust the wheel attitude to reduce the turning radius of the vehicle, or when encountering safety accidents such as extreme flat tires or slippery roads, the vehicle attitude cannot be balanced and stabilized by an independent driving device, leading to serious traffic accidents. In addition, in order to achieve differential, differential lock and vector control, the motor needs to be equipped with a differential mechanism (the differential mechanism includes a differential and a differential lock) and a vector control mechanism, etc., resulting in a large occupied space and a large weight.

[0064] The vehicle drive assembly 100 of the present utility model drives two wheels 30 respectively through two motors 2. The two motors 2 are respectively located in two reduction drive systems 10 and are independent of each other. Without mechanisms such as a mechanical differential in the prior art, functions such as differential, differential lock and vector control can still be achieved. In addition, a single motor 2 corresponds to a single wheel 30, so that the torque and speed of the motor 2 are independently controllable, and the response speed is faster. Through the coordinated control of each motor 2 by the motor controller 20, the control of the motor 2 can be made more accurate, improving the stability of the vehicle.

[0065] Optionally, the motor controller 20 can be two independent single-motor controllers 20 or an integrated dual-motor controller 20. The motor controller 20 is electrically connected to the motors 2 of the two reduction drive systems 10 respectively through three-phase high-voltage lines or three-phase transfer copper bars.

[0066] It should be noted that the vehicle drive assembly 100 of the present utility model can be used for the front drive or rear drive of a pure electric two-wheel drive vehicle, and can also be used for the front drive and rear drive of a pure electric four-wheel drive vehicle at the same time. It can also be used for the front drive or rear drive of an extended-range or series-parallel hybrid vehicle.

[0067] According to the vehicle drive assembly 100 of the embodiment of the present utility model, by providing the above-mentioned reduction drive system 10, the double-row planetary gear device 3 includes a first gear train 31 and a second gear train 32. The first gear train 31 and the second gear train 32 are arranged and connected in the axial direction of the motor 2. The input end of one of the first gear train 31 and the second gear train 32 is connected to the output shaft 221, and the input end of the parallel shaft gear reduction device 4 is connected to the output end of at least one of the first gear train 31 and the second gear train 32. The output end of the parallel shaft gear reduction device 4 is connected to the wheel 30. Through the transmission of the double-row planetary gear device 3 and the parallel shaft gear reduction device 4, a large transmission ratio can be achieved, improving the speed reduction and torque increase effect of the reduction drive system 10, increasing the starting acceleration of the vehicle, and enhancing the power performance of the vehicle.

[0068] In some embodiments of the present utility model, referring to the attached Figure 1 As shown, the two reduction drive systems 10 are symmetrically arranged along the central axis extending in the front-rear direction of the vehicle (as Figure 1 shown), which can facilitate the layout of the vehicle drive assembly 100, ensure the balance of power transmission, ensure the balance of the vehicle during driving, and reduce the operation instability and potential safety hazards caused by the center of gravity shift.

[0069] The present utility model also proposes a vehicle having the vehicle drive assembly 100 of the above embodiment.

[0070] For the vehicle according to the embodiment of the present utility model, by providing the above vehicle drive assembly 100, the double-row planetary gear device 3 includes a first gear train 31 and a second gear train 32. The first gear train 31 and the second gear train 32 are arranged and connected in the axial direction of the motor 2. The input end of one of the first gear train 31 and the second gear train 32 is connected to the output shaft 221. The input end of the parallel shaft gear reduction device 4 is connected to the output end of at least one of the first gear train 31 and the second gear train 32. The output end of the parallel shaft gear reduction device 4 is connected to the wheel 30. Through the transmission of the double-row planetary gear device 3 and the parallel shaft gear reduction device 4, a large transmission ratio can be achieved, the speed reduction and torque increase effect of the reduction drive system 10 can be improved, the starting acceleration of the vehicle can be increased, and the power performance of the vehicle can be enhanced.

[0071] The other components and operations of the reduction drive system 10, the vehicle drive assembly 100 and the vehicle according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.

[0072] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0073] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A reduction transmission system, characterized in that: include: case; A motor, the motor is arranged in the housing, and the motor has an output shaft; a double-row planetary gear device, the double-row planetary gear device being disposed in the housing and comprising a first gear train and a second gear train, the first gear train and the second gear train being arranged and connected in the axial direction of the motor, and an input end of one of the first gear train and the second gear train being connected to the output shaft; A parallel shaft gear reduction device, wherein the input end of the parallel shaft gear reduction device is connected to the output end of at least one of the first gear train and the second gear train, and the output end of the parallel shaft gear reduction device is connected to the wheel.

2. The reduction transmission system according to claim 1, characterized in that: The first gear train comprises: a first ring gear connected to an input end of the parallel shaft gear reduction device; A first sun gear, the first sun gear is arranged in the first gear ring and is spaced apart, and the first sun gear is connected to the output shaft; a plurality of first planetary gears, wherein the first planetary gears are meshed between the first ring gear and the first sun gear, and the plurality of first planetary gears are arranged at intervals along the circumferential direction of the first sun gear; a first planet carrier, on which the plurality of first planetary gears are rotatably arranged; The second gear train comprises: a second ring gear, the second ring gear being connected to the first planet carrier and rotating synchronously; a second sun gear, the second sun gear being arranged in the second gear ring and spaced apart, and the second sun gear being fixed on the housing; a plurality of second planetary gears, wherein the second planetary gears are meshed between the second ring gear and the second sun gear, and the plurality of second planetary gears are arranged at intervals along the circumferential direction of the second sun gear; A second planet carrier, a plurality of the second planetary gears are rotatably arranged on the second planet carrier, and the second planet carrier is connected to the first ring gear and rotates synchronously.

3. The reduction transmission system according to claim 1 or 2, characterized in that: The second gear train is located at a side of the first gear train close to the wheel.

4. The reduction transmission system according to claim 1, characterized in that: The parallel shaft gear reduction device comprises: a first gear connected to an output end of the double-row planetary gear device; a second gear, the second gear meshing with the first gear; A drive shaft is used to connect the second gear and the wheel.

5. The reduction transmission system according to claim 4, characterized in that: The parallel shaft gear reduction device also includes: an intermediate shaft, the intermediate shaft being disposed on the second gear and rotating synchronously with the second gear; a third gear, the third gear being connected to the intermediate shaft and rotating synchronously with the intermediate shaft; A fourth gear is meshed with the third gear and connected to an end of the drive shaft away from the wheel.

6. The reduction transmission system according to claim 5, characterized in that: The drive shaft is parallel to or coaxial with the output shaft.

7. The reduction transmission system according to claim 1, characterized in that: The motor comprises a stator and a rotor, wherein the rotor is rotatable in the stator, the output shaft is arranged on the rotor, and at least a part of the double-row planetary gear device is located in the rotor.

8. A vehicle drive assembly, characterized in that: include: The reduction transmission system according to any one of claims 1 to 7, wherein there are two reduction transmission systems; A motor controller, the motor controller being electrically connected to the motors of the two reduction transmission systems at the same time; Two wheels, the two wheels are arranged opposite to each other in the left-right direction of the vehicle and are respectively connected to the output ends of the parallel shaft gear reduction devices of the two reduction transmission systems.

9. The vehicle drive assembly according to claim 8, characterized in that: The two reduction transmission systems are symmetrically arranged along a central axis of the vehicle extending in the front-rear direction.

10. A vehicle, characterized in that: Comprising a vehicle drive assembly according to claim 8 or 9.

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