Speed reducer, independent suspension and vehicle

Abstract

The utility model provides a speed reducer, an independent suspension and a vehicle, the speed reducer comprises an input part and an output part, and the input part is in transmission connection with the output part; the input part comprises a motor and an input assembly, and a motor shaft of the motor is in transmission connection with the input assembly; the output part comprises a differential mechanism, a longitudinal arm, a chain transmission assembly and an output shaft, the differential mechanism is arranged on the longitudinal arm, and the chain transmission assembly comprises a first chain wheel installed on the longitudinal arm, a second chain wheel installed at the first end of the output shaft and a chain installed between the first chain wheel and the second chain wheel; the second end of the output shaft is in transmission connection with the input assembly. According to the embodiment of the invention, the problem that a speed reducer in the prior art is difficult to meet the large-center-distance application requirements of independent suspension systems of some vehicles can be solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a reducer, an independent suspension and a vehicle. Background Art

[0002] At present, the reducer adopts a three-axis two-stage reduction method, which is composed of an input shaft gear, an intermediate gear, an output gear and a differential. However, the independent suspension swing arm of some vehicles requires the motor center distance to be greater than 360nm, which makes it difficult to match the reducer when matching the vehicle's independent suspension. If the three-axis two-stage reducer increases the center distance by making each gear larger, it is easy to cause the ground clearance of the reducer to not meet the vehicle layout requirements. If the center distance is increased by adding an idler wheel, the reducer will become a four-axis reducer, resulting in lower transmission efficiency. It can be seen that the reducer in the prior art is difficult to meet the large center distance application requirements of some vehicle independent suspension systems. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a reducer, an independent suspension and a vehicle to solve the problem that the reducer in the prior art is difficult to meet the large center distance application requirements of some vehicle independent suspension systems.

[0004] In order to solve the above technical problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a reducer, comprising: an input part and an output part, wherein the input part is drivingly connected to the output part;

[0006] The input part comprises a motor and an input assembly, and the motor shaft of the motor is drivingly connected to the input assembly;

[0007] The output part includes a differential, a longitudinal arm, a chain transmission assembly and an output shaft. The differential is arranged on the longitudinal arm. The chain transmission assembly includes a first sprocket installed on the longitudinal arm, a second sprocket installed on the first end of the output shaft, and a chain installed between the first sprocket and the second sprocket. The second end of the output shaft is drivingly connected to the input assembly.

[0008] Optionally, the reducer further comprises a housing, and both ends of the longitudinal arm pass through the housing and are transmission-connected to the tire assembly;

[0009] An active cavity is provided in the housing, the input assembly, the differential and the chain transmission assembly are all arranged in the active cavity, and the input assembly is connected to the motor arranged outside the active cavity through a through hole opened in the housing.

[0010] Optionally, the input assembly includes a meshing first gear and a second gear, the first gear and the second gear are arranged in the movable cavity, the first gear is connected to the motor shaft of the motor, and the second gear is connected to the second end of the output shaft.

[0011] Optionally, the reducer also includes a mounting shaft and an idler wheel, the mounting shaft is arranged in the active cavity, both ends of the mounting shaft are connected to the housing, the idler wheel is passed through the mounting shaft, and the idler wheel is arranged between the differential and the second gear, and the idler wheel is respectively meshed with the gear in the differential and the second gear.

[0012] Optionally, a gear diameter of the first gear is smaller than a gear diameter of the second gear.

[0013] Optionally, the gear diameter of the first sprocket and the gear diameter of the second sprocket are both smaller than the gear diameter of the second gear.

[0014] Optionally, the chain transmission assembly further includes at least one third sprocket, and the first sprocket, the at least one third sprocket and the second sprocket are arranged in sequence, and are used to drive the chain arranged on the first sprocket, the at least one third sprocket and the second sprocket to rotate.

[0015] Optionally, the electric machine comprises a motor housing rigidly mountable to the housing.

[0016] In a second aspect, an embodiment of the present application further provides an independent suspension, wherein the independent suspension is provided with a reducer as described in any one of the first aspects.

[0017] In a third aspect, an embodiment of the present application further provides a vehicle, wherein the vehicle is provided with an independent suspension as described in the second aspect.

[0018] In the embodiment of the present application, the reducer is provided with an input part and an output part which are transmission-connected, and the input part includes a motor and an input assembly, and the motor shaft of the motor is transmission-connected with the input assembly. The output part includes a differential, a longitudinal arm, a chain transmission assembly and an output shaft, and the differential is arranged on the longitudinal arm, and the chain transmission assembly includes a first sprocket mounted on the longitudinal arm, a second sprocket mounted on the first end of the output shaft, and a chain mounted between the first sprocket and the second sprocket, and the second end of the output shaft is transmission-connected with the input assembly. In this way, by arranging the chain transmission assembly in the reducer, the center distance of the differential can be adjusted according to the length of the chain, so as to adapt to the requirements of different vehicles for different center distances, improve the platform universality rate of the bridge reducer in different center distances of vehicles, reduce the weight of the reducer, reduce the development cost, and shorten the development cycle of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A schematic diagram of the structure of a reducer provided in an embodiment of the present application;

[0021] The reference numerals are as follows:

[0022] 10: reducer;

[0023] 11: input part; 111: motor; 1111: motor shaft; 112: input assembly; 1121: first gear; 1122: second gear;

[0024] 12: output part; 121: differential; 122: trailing arm; 123: chain transmission assembly; 1231: first sprocket; 1232: second sprocket; 1233: chain; 124: output shaft;

[0025] 13: Shell;

[0026] 20: Tire assembly. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In the description of the present application, it should be understood that the terms "X-axis", "Y-axis", "Z-axis", "vertical", "parallel", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as

[0029] It is not interpreted as a limitation of the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more. In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0030] Please refer to Figure 1 , the embodiment of the present application provides a reducer 10, comprising:

[0031] An input part 11 and an output part 12, wherein the input part 11 is drivingly connected with the output part 12;

[0032] The input unit 11 includes a motor 111 and an input assembly 112, and a motor shaft 1111 of the motor 111 is drivingly connected to the input assembly 112;

[0033] The output part 12 includes a differential 121, a longitudinal arm 122, a chain transmission assembly 123 and an output shaft 124. The differential 121 is arranged on the longitudinal arm 122. The chain transmission assembly 123 includes a first sprocket 1231 installed on the longitudinal arm, a second sprocket 1232 installed on the first end of the output shaft, and a chain 1233 installed between the first sprocket 1231 and the second sprocket 1232. The second end of the output shaft 124 is drivingly connected to the input assembly 112.

[0034] It is understood that the above-mentioned reducer 10 includes an input part 11 and an output part 12, and the input part 11 is composed of a motor 111 and an input assembly 112. Among them, the motor 111 can be a DC motor, an AC motor or any other type of motor, and its motor shaft 1111 is directly or through a transmission component such as a coupling and connected to the input assembly 112. The input assembly 112 can be a gear, a pulley or any suitable transmission device, which is convenient for effectively transmitting the rotational motion from the motor to the output part 12. The output part 12 includes a differential 121, a longitudinal arm 122, a chain drive assembly 123 and an output shaft 124. The differential 121 is installed on the longitudinal arm 122, allowing the tire assembly 20 installed at both ends of the longitudinal arm 122 to rotate at different speeds when turning, thereby improving the handling performance of the vehicle. The longitudinal arm is also connected to the chain drive assembly to receive the power from the input part 11 transmitted by the chain drive assembly 123.

[0035] Furthermore, the chain transmission assembly 123 is composed of a first sprocket 1231, a second sprocket 1232 and a chain 1233. The first sprocket 1231 is mounted on the longitudinal arm 122, and the second sprocket 1232 is mounted on the first end of the output shaft 124, and the two sprockets are connected by the chain 1233. This arrangement allows the power from the input part 11 to be further transmitted through the chain transmission assembly 123, and at the same time, the center distance of the reducer 10 can be adjusted by adjusting the length of the chain 1233, so that the reducer 10 in the embodiment of the present application can be widely used in vehicles with various center distance requirements, and the platform universality rate of the electric drive axle reducer 10 in vehicles with different center distances is improved.

[0036] In addition, the second end of the output shaft 124 is transmission-connected to the input assembly 112, ensuring smooth and efficient power transmission from the motor 111 to the output shaft 124, while being able to adjust the center distance required by the reducer 10 according to the chain drive assembly 123 to meet the center distance requirements of different vehicles.

[0037] In the specific embodiment of the present application, the reducer 10 is suitable for a variety of industrial and vehicle application scenarios, such as automotive drive systems, automation equipment, robotics, etc., by accurately controlling the output speed and torque. Through the reasonable configuration of the chain transmission components, the reducer 10 can not only achieve efficient power transmission, but also meet the various center distance requirements of different vehicles, shorten the reducer development cycle, reduce development costs, and significantly reduce the reducer weight and Z-height, reduce the lubrication system development cycle, and improve vehicle passability.

[0038] Optionally, the reducer 10 further includes a housing 13, and both ends of the longitudinal arm 122 pass through the housing 13 and are transmission-connected to the tire assembly 20;

[0039] An active cavity is provided in the housing 13 , and the input assembly 112 , the differential 121 and the chain transmission assembly 123 are all arranged in the active cavity. The input assembly 112 is connected to the motor 111 arranged outside the active cavity through a through hole opened in the housing 13 .

[0040] It is worth mentioning that the reducer 10 is also designed with a housing 13 to further enhance its structural integrity and functionality. The housing 13 not only provides physical protection for the parts inside the reducer 10 to prevent the intrusion of dust, moisture and other external impurities, but also supports the stable connection of the trailing arm 122.

[0041] Specifically, both ends of the housing 13 are designed to allow the longitudinal arm 122 to pass through and be connected to the tire assembly 20. This ensures smooth and efficient power transmission from the input part 11 to the output part 12, and can provide excellent driving performance in practical applications. An active cavity is provided in the housing 13, which is specially designed to install the input assembly 112, the differential 121 and the chain drive assembly 123. This design carefully considers the spatial layout between the components, ensuring effective coordination and power transmission efficiency between them.

[0042] Furthermore, the input assembly 112 is connected to the external motor 111 through a through hole provided on the housing 13. This through hole not only facilitates the transmission connection between the motor shaft 1111 and the input assembly 112, but also maintains the closedness of the housing 13, thereby protecting the internal parts from the external environment. The design of the through hole takes into account the sealing and the stability of the connection, ensuring the reliability and safety during operation.

[0043] In this way, the design of the housing 13 provides additional protection and stability for the reducer 10, making it suitable not only for ordinary environments, but also for operations under harsh conditions, such as rain, mud, and other environments that may damage the internal components of the machine. By protecting the internal parts from corrosion or wear, the service life of the reducer is extended and the maintenance cost is reduced. Combined with the design of the housing, the reducer 10 in the embodiment of the present application significantly improves its scope of application, especially in the fields of automobiles, heavy machinery, industrial automation, etc., which can greatly improve the reliability and durability of the equipment and meet more stringent use conditions and performance requirements.

[0044] Optionally, the input component 112 includes a meshing first gear 1121 and a second gear 1122, the first gear 1121 and the second gear 1122 are arranged in the active cavity, the first gear 1121 is connected to the motor shaft 1111 of the motor 111, and the second gear 1122 is connected to the second end of the output shaft 124.

[0045] In some embodiments of the present application, the input assembly may include two mutually meshing gears, a first gear 1121 and a second gear 1122, both of which are mounted in the active cavity. Among them, the first gear 1121 can be directly connected to the motor shaft 1111 of the motor 111, and this connection method can effectively transmit the rotation of the motor 111 to the first gear 1121, thereby driving the first gear 1121 to rotate. The first gear 1121 can be a spur gear or a helical gear, and the specific type depends on the required transmission efficiency and noise level. The second gear 1122 can be connected to the second end of the output shaft 124 and mesh with the first gear 1121. Through this configuration, the second gear 1122 can not only receive power from the first gear 1121, but also further adjust the rotation speed and torque. Similar to the first gear 1121, the type of the second gear 1122 can also be selected according to the actual application scenario and performance requirements.

[0046] It is worth mentioning that the above two meshing gears constitute the core part of the input assembly 112, which effectively realizes the power transmission and speed reduction function from the motor 111 to the output shaft 124. The ratio of the meshing gears determines the reduction ratio, which can be adjusted according to actual needs to achieve the ideal output speed. By introducing the meshing first gear 1121 and the second gear 1122, the design of the reducer 10 is more flexible and the output speed and torque can be controlled more accurately.

[0047] Optionally, the reducer 10 also includes a mounting shaft and an idler wheel, the mounting shaft is arranged in the active cavity, both ends of the mounting shaft are connected to the housing 13, the idler wheel is passed through the mounting shaft, and the idler wheel is arranged between the differential 121 and the second gear 1122, and the idler wheel is respectively engaged with the gear in the differential 121 and the second gear 1122.

[0048] In the design of the reducer in this embodiment, a mounting shaft (not shown in the figure) and an idler wheel (not shown in the figure) can also be provided to further enhance its transmission function and flexibility, extend the distance between the longitudinal arm 122 and the first gear 1121, and increase the center distance of the reducer 10. The mounting shaft can be specifically installed in the movable cavity, and its two ends are fixedly connected to the housing 13. This design not only provides a stable installation base for the mounting shaft, but also ensures that it can withstand various forces and torques generated during the transmission process, thereby maintaining the stability and durability of the entire mechanical structure.

[0049] Furthermore, the idler wheel is cleverly inserted into the mounting shaft and the position is selected between the differential 121 and the second gear 1122. The existence of the idler wheel not only makes the transmission path more flexible, but also effectively adjusts the transmission ratio and optimizes the power distribution through its meshing with the gear in the differential 121 and the second gear 1122. This configuration enables the reducer to automatically or manually adjust the transmission ratio according to specific working conditions, thereby controlling the speed and torque of the output shaft to meet more complex and variable application requirements.

[0050] In addition, through the engagement of the idler gear with the differential 121 and the second gear 1122, the transmission noise can be reduced to a certain extent and the running smoothness can be improved, thereby improving the user experience and extending the service life of the equipment.

[0051] Optionally, a gear diameter of the first gear 1121 is smaller than a gear diameter of the second gear 1122 .

[0052] In some embodiments, the gear diameter of the first gear 1121 can be set to be smaller than the gear diameter of the second gear 1122. In this way, the first gear 1121, as a gear smaller than the second gear 1122, can drive the second gear 1122 to rotate to achieve a decreasing speed.

[0053] Specifically, the gear diameter of the first gear 1121 is designed to be smaller than the gear diameter of the second gear 1122. This difference in diameter means that the first gear 1121 will rotate at a higher speed, while the relatively larger second gear 1122 will rotate at a slower speed, thereby achieving a deceleration effect. In addition, by increasing the diameter of the second gear 1122 to reduce its rotation speed, the torque at the output end can be increased accordingly, meeting the demand for high torque output.

[0054] Optionally, the gear diameter of the first sprocket 1231 and the gear diameter of the second sprocket 1232 are both smaller than the gear diameter of the second gear 1122 .

[0055] In some embodiments of the present application, the first sprocket and the second sprocket can be chain 1233 gears of the same size and model, which can mesh with the chain 1233. The gear diameters of the first sprocket 1231 and the second sprocket 1232 are both smaller than the gear diameter of the second gear 1122, so that the speed transmitted to the chain transmission assembly 123 by the second gear 1122 increases, and is smoothly transmitted in sequence by the first sprocket 1231, the chain 1233, and the second sprocket 1232. In addition, the gear diameter of the first sprocket 1231 can be larger than the gear diameter of the second sprocket 1232, so that the speed transmitted to the differential 121 is smaller, and multi-stage deceleration is achieved from input to output, which effectively reduces the speed and amplifies the torque. In application scenarios that require high torque and low speed operation, such as heavy-duty equipment or vehicle drive systems with challenging road conditions, this design significantly improves performance and applicability.

[0056] In addition, the difference in the diameter of the gear and sprocket allows the reducer to be more flexible to adapt to different working conditions and requirements. For designers, by adjusting the size of the gear and sprocket, the most suitable transmission ratio and output performance can be customized for a specific application without changing the main design. It also helps to reduce the wear caused by high-speed rotation and extend the service life of the entire reducer component.

[0057] Optionally, the chain transmission assembly 123 also includes at least one third sprocket, and the first sprocket 1231, the at least one third sprocket and the second sprocket 1232 are arranged in sequence, and are used to drive the chain 1233 set on the first sprocket 1231, the at least one third sprocket and the second sprocket 1232 to rotate.

[0058] It should be noted that the chain transmission assembly 123 may also include at least one third sprocket (not shown) arranged side by side with the first sprocket 1231 and the second sprocket 1232, and at least one third sprocket may be arranged between the first sprocket 1231 and the second sprocket 1232. The chain 1233 may circulate through the first sprocket 1231, the at least one third sprocket and the second sprocket 1232 in sequence. In this way, by arranging at least one third sprocket side by side between the first sprocket 1231 and the second sprocket 1232, the length of the chain 1233 may be increased, the center distance of the reducer 10 may be increased, and the different center distance requirements of the vehicle may be met. The present application does not specifically limit the number of the newly added third sprockets, and the selection may be made according to the actual application scenario and performance requirements.

[0059] It is worth mentioning that the embodiment of the present application can increase the center distance of the reducer 10 by introducing the chain transmission assembly 123 without changing the structural setting of the reducer 10. By setting the length of the chain 1233, the center distance of the reducer 10 can be adjusted between 200mm and 400mm. In actual application, when the reducer 10 is applied to an off-road vehicle or a special vehicle, the center distance of the reducer 10 can be designed to be 360mm or 390mm. In this way, the reducer 10 does not need to increase the center distance by increasing the gear diameter, and meets the vehicle's passability and ground clearance requirements.

[0060] Optionally, the electric motor 111 comprises a motor housing which can be rigidly mounted to the housing 13 .

[0061] In another specific embodiment of the present application, a motor housing may be provided on the motor 111, which may be rigidly mounted on the housing 13, thereby simplifying the overall structure of the reducer 10 and facilitating the arrangement of the reducer 10 in the central part of the vehicle. Since the embodiment of the present application does not change the original gear structure, the center distance is only increased by the chain 1233 transmission assembly, thereby meeting the vehicle's ground clearance requirements and improving transmission efficiency.

[0062] The embodiment of the present application also provides an independent suspension, wherein the independent suspension is provided with Figure 1 The reducer described in the embodiment can achieve the beneficial effects of the above embodiments. For details, please refer to the relevant descriptions in the above embodiments. To avoid repetition, no further description will be given here.

[0063] In another embodiment of the present application, a vehicle is provided, wherein the vehicle is provided with an independent suspension as described in the above embodiment, and the independent suspension is provided with Figure 1 For details of the reducer described in the embodiment, please refer to the relevant instructions in the above embodiment.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A reducer, characterized in that: include: An input part and an output part, wherein the input part is drivingly connected to the output part; The input part comprises a motor and an input assembly, and the motor shaft of the motor is drivingly connected to the input assembly; The output part includes a differential, a longitudinal arm, a chain transmission assembly and an output shaft. The differential is arranged on the longitudinal arm. The chain transmission assembly includes a first sprocket installed on the longitudinal arm, a second sprocket installed on the first end of the output shaft, and a chain installed between the first sprocket and the second sprocket. The second end of the output shaft is drivingly connected to the input assembly.

2. The reducer according to claim 1, characterized in that: The reducer also includes a housing, and the two ends of the longitudinal arm pass through the housing to be transmission-connected with the tire assembly; An active cavity is provided in the housing, the input assembly, the differential and the chain transmission assembly are all arranged in the active cavity, and the input assembly is connected to the motor arranged outside the active cavity through a through hole opened in the housing.

3. The reducer according to claim 2, characterized in that: The input assembly includes a first gear and a second gear that are meshed, the first gear and the second gear are arranged in the movable cavity, the first gear is connected to the motor shaft of the motor, and the second gear is connected to the second end of the output shaft.

4. The reducer according to claim 3, characterized in that: The reducer also includes a mounting shaft and an idler wheel. The mounting shaft is arranged in the movable cavity. Both ends of the mounting shaft are connected to the housing. The idler wheel is passed through the mounting shaft and is arranged between the differential and the second gear. The idler wheel is respectively meshed with the gear in the differential and the second gear.

5. The reducer according to claim 3, characterized in that: A gear diameter of the first gear is smaller than a gear diameter of the second gear.

6. The reducer according to claim 5, characterized in that: The gear diameter of the first sprocket and the gear diameter of the second sprocket are both smaller than the gear diameter of the second gear.

7. The reducer according to claim 1, characterized in that: The chain transmission assembly also includes at least one third sprocket, and the first sprocket, the at least one third sprocket and the second sprocket are arranged in sequence to drive the chain arranged on the first sprocket, the at least one third sprocket and the second sprocket to rotate.

8. The reducer according to claim 2, characterized in that: The electric machine includes a motor housing rigidly mountable to the housing.

9. An independent suspension, characterized in that: The independent suspension is provided with a reducer as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle is provided with the independent suspension according to claim 9.

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