WO2024082199A1

WO2024082199A1 - Variable-speed transmission apparatus and vehicle

Info

Publication number: WO2024082199A1
Application number: PCT/CN2022/126305
Authority: WO
Inventors: 吴凯; 庄朝晖
Original assignee: 宁德时代新能源科技股份有限公司; 宁德时代(上海)智能科技有限公司
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2024-04-25
Also published as: CN118076818A

Abstract

Embodiments of the present application provide a variable-speed transmission apparatus and a vehicle. The variable-speed transmission apparatus comprises a driving member, a first transmission member, an output member, and a clutch assembly; the driving member comprises a rotating shaft; the first transmission member is connected to the rotating shaft of the driving member; the clutch assembly comprises a first clutch and a second clutch, the first clutch is used for connecting the rotating shaft and the output member, and the second clutch is used for connecting the first transmission member and the output member. The embodiments can implement the switching of different gear transmission modes, the structure of the first transmission member is simple, and the number of gears used is reduced, such that the structure of the variable-speed transmission apparatus is simpler, and the cost is reduced.

Description

Speed transmission and vehicle

Technical Field

The present application relates to the technical field of vehicles, and more particularly, to a speed change transmission device and a vehicle.

Background technique

The vehicle's variable speed transmission is a transmission device used to coordinate the engine speed and the actual driving speed of the wheels. The engine's output speed is very high, and the maximum power and maximum torque appear in a certain speed range. The variable speed transmission device can be used to bring out the best performance of the engine. The variable speed transmission device can produce different speed ratios between the engine and the wheels during the vehicle's driving process to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or step-by-step manner.

In the development of vehicle technology, how to make the structure of the vehicle's speed transmission device simpler while ensuring the transmission effect of the vehicle's speed transmission device is an important research direction in vehicle technology.

Summary of the invention

The present application provides a speed transmission device and a vehicle, which can make the structure of the speed transmission device simpler while ensuring the transmission effect of the speed transmission device of the vehicle.

In a first aspect, an embodiment of the present application provides a speed transmission device, comprising a driving member, a first transmission member, an output member and a clutch assembly, wherein the driving member has a rotating shaft; the first transmission member is connected to the rotating shaft of the driving member; the clutch assembly comprises a first clutch and a second clutch, the first clutch is used to connect the rotating shaft and the output member, and the second clutch is used to connect the first transmission member and the output member.

In the above scheme, the output member is used to connect to the wheel, the rotating shaft of the driving member is connected to the output member through the first clutch, and when the first clutch is engaged with the output member, the output power of the driving member is transmitted to the wheel through the rotating shaft, the first clutch and the output member. The rotating shaft of the driving member is connected to the first transmission member, and the first transmission member is connected to the output member through the second clutch. When the second clutch is engaged with the output member, the output power of the driving member is transmitted to the wheel through the rotating shaft, the first transmission member, the second clutch and the output member. This embodiment uses a first transmission member and different clutches to not only realize the switching of different gear transmission modes, but also reduce the number of transmission members, making the structure of the speed change transmission device simpler and reducing the cost.

In some embodiments, the first transmission member includes a sun gear, a planetary gear and a planetary carrier, the sun gear is connected to the rotating shaft of the driving member, the planetary gear is engaged with the outside of the sun gear, the planetary carrier is connected to the planetary gear, and the second clutch includes a first sub-clutch, which is used to connect the planetary carrier and the output member.

In the above scheme, the first transmission member is a planetary gear. When the first sub-clutch is engaged with the output member, the power output by the driving member is transmitted to the wheel through the rotating shaft, the planetary gear, the planetary carrier, the first sub-clutch and the output member. Through the transmission of the planetary gear and the planetary carrier, the speed ratio of the output member can be adjusted so that the wheel rotates at a preset speed, thereby improving the flexibility of the speed transmission device. In addition, the structure of the first transmission member itself is simple, which reduces the use of gears, further simplifies the speed transmission device, and reduces costs.

In some embodiments, the speed change transmission device further includes a first brake connected to the planet carrier for controlling braking of the planet carrier.

In the above scheme, when the first sub-clutch is not needed to work, the first brake is used to control the planet carrier to brake, the planet carrier no longer rotates, and the planetary gear can only rotate on its own but not revolve, thereby changing the speed ratio of the output member. The control of the first brake is convenient and fast, and the transmission efficiency of the speed transmission device is improved.

In some embodiments, the first transmission member further includes a ring gear, which is meshed with the planetary gear, and the second clutch further includes a second sub-clutch, which is used to connect the ring gear and the output member.

In the above scheme, when the second sub-clutch engages with the output member, the power output by the driving member is transmitted to the wheels through the rotating shaft, planetary gears, ring gears, the second sub-clutch and the output member. Through the transmission of the planetary gears and the ring gears, the speed ratio of the output member is different from the speed ratio when the first sub-clutch is working, so that the vehicle has a three-speed shift, and the vehicle's wide speed ratio and efficiency are improved by increasing the gears of the vehicle.

In some embodiments, the speed change transmission device further includes a second brake connected to the ring gear for controlling the braking of the ring gear.

In the above scheme, when the second sub-clutch is not needed to work, the ring gear is braked by controlling the second brake, and the ring gear no longer rotates. At this time, the planetary carrier can rotate, and the planetary gears can both revolve and rotate. The planetary carrier is engaged with the output member through the first sub-clutch, and the control of the second brake is convenient and fast, thereby improving the transmission efficiency of the speed transmission device.

In some embodiments, the planetary gear includes a first sub-gear and a second sub-gear connected to each other, the first sub-gear is externally meshed with the sun gear, and the second sub-gear is internally meshed with the ring gear.

In the above scheme, the planetary gear is a double gear, the first sub-gear and the second sub-gear are coaxial but separated by a certain distance to form an integrated structure, which can change the rotation speed of the output member and realize the adjustment of multiple rotation speeds.

In some embodiments, the speed transmission device also includes a differential, which is connected to the output member. The differential can enable the left and right (or front and rear) wheels to rotate at different speeds, thereby improving the vehicle's driving performance and handling performance.

In some embodiments, the speed change transmission device further includes a second transmission member, and the differential and the output member are connected via the second transmission member. The transmission efficiency can be improved through the transmission of the second transmission member, and the power of the driving member can be transmitted to the differential.

In some embodiments, the second transmission member is a transmission gear, the differential is provided with a differential gear, the transmission gear and the differential gear are meshed with each other, the gear transmission has high precision and efficiency, and the structure is compact.

An embodiment of the second aspect of the present application provides a vehicle, comprising a speed change transmission device according to any one of the above-mentioned embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in 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 the drawings without creative work.

FIG1 is a schematic diagram of a speed-changing transmission device provided in some embodiments of the present application;

FIG2 is a schematic diagram of power transmission of a speed-changing transmission device provided in some embodiments of the present application;

FIG3 is a schematic structural diagram of a first transmission member provided in some embodiments of the present application;

FIG4 is a schematic diagram of a speed-changing transmission device provided in some other embodiments of the present application;

FIG5 is a schematic diagram of power transmission of a speed-changing transmission device provided in other embodiments of the present application;

FIG6 is a schematic diagram of power transmission of a speed-changing transmission device provided in some other embodiments of the present application;

FIG. 7 is a schematic diagram of the structure of a planetary gear provided in some embodiments of the present application;

FIG. 8 is a schematic diagram of a speed-changing transmission device provided in some other embodiments of the present application.

The figure numbers are as follows: driving member 10; rotating shaft 11; first transmission member 20; sun gear 21; planetary gear 22; first sub-gear 221; second sub-gear 222; planetary carrier 23; ring gear 24; output member 30; clutch assembly 40; first clutch 41; second clutch 42; first sub-clutch 421; second sub-clutch 422; first brake 51; second brake 52; differential 60; second transmission member 70.

Detailed ways

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

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

Reference to "embodiment" in this application means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

The term "and/or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the power supply device are only exemplary descriptions and should not constitute any limitation to the present application.

The term "plurality" used in the present application refers to two or more (including two).

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

The inventors of the present invention have noticed that the speed change transmission device of a vehicle is a speed change device used to coordinate the speed of the engine and the actual driving speed of the wheels. The output speed of the engine is very high, and the maximum power and maximum torque appear in a certain speed range. The speed change transmission device can be used to exert the best performance of the engine. The speed change transmission device can generate different speed ratios between the engine and the wheels during the driving process of the vehicle to change the speed and torque from the engine. It can change the transmission ratio of the output member and the input shaft in a fixed or step-by-step manner. After further research, it was found that the speed change device of the vehicle generally adopts gear transmission, such as sliding gears and synchronizers. According to the speed reduction principle of gear transmission, the shifting behavior when the vehicle is driving is to make different gear pair transmission members in the speed change transmission device work through the operating mechanism. However, conventional speed change transmission devices need to use more different transmission members to achieve that at low speed, the gear pair transmission member with a large transmission ratio works, and at high speed, the gear pair transmission member with a small transmission ratio works. The large number of gear pair transmission members increases the complexity of the speed change transmission device and increases the cost.

In view of this, the present application provides a technical solution, in which a speed transmission device includes a driving member, a first transmission member, an output member and a clutch assembly, the driving member has a rotating shaft; the first transmission member is connected to the rotating shaft of the driving member; the clutch assembly includes a first clutch and a second clutch, the first clutch is used to connect the rotating shaft and the output member, and the second clutch is used to connect the first transmission member and the output member.

In the above scheme, the rotating shaft of the driving member is connected to the output member through the first clutch. When the first clutch is engaged with the output member, the output power of the driving member is transmitted to the wheel through the rotating shaft, the first clutch and the output member. The rotating shaft of the driving member is connected to the first transmission member, and the first transmission member is connected to the output member through the second clutch. When the second clutch is engaged with the output member, the output power of the driving member is transmitted to the wheel through the rotating shaft, the first transmission member, the second clutch and the output member. This embodiment uses a first transmission member and different clutches, which not only can realize the switching of different gear transmission modes, but also reduces the number of transmission members, making the structure of the speed transmission device simpler and reducing the cost.

It should be noted that the speed transmission device of the embodiment of the present application is particularly suitable as a speed transmission device for a vehicle, but is not limited to being a speed transmission device for a vehicle. If other devices use the drive member provided by the present invention, they should also fall within the protection scope of the present invention. For example, the speed transmission device of the embodiment of the present application can also be applied to ships, aircraft, etc. Among them, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

Figure 1 is a schematic diagram of a speed change transmission device provided by some embodiments of the present application. As shown in Figure 1, an embodiment of the first aspect of the present application provides a speed change transmission device, including a driving member 10, a first transmission member 20, an output member 30 and a clutch assembly 40, the driving member 10 has a rotating shaft 11; the first transmission member 20 is connected to the rotating shaft 11 of the driving member 10; the clutch assembly 40 includes a first clutch 41 and a second clutch 42, the first clutch 41 is used to connect the rotating shaft 11 and the output member 30, and the second clutch 42 is used to connect the first transmission member 20 and the output member 30.

The driving member 10 can be a motor or an engine. The rotating shaft 11 of the driving member 10 serves as an input shaft to provide power input. When the speed transmission device of the present application is applied to a new energy electric vehicle, the driving member 10 is a motor. When the speed transmission device of the present application is applied to a fuel vehicle or a gas vehicle, the driving member 10 is an engine. The first transmission member 20 can be a transmission member such as a gear pair or a planetary gear that meshes with each other. A first transmission member 20 is connected to the second clutch 42 to simplify the structure of the speed transmission device. The output member 30 can be an output member such as an output shaft or an output flange, which is used to connect to the wheel. The clutch is similar to a switch, which engages or disengages the power transmission function. The active part and the driven part of the clutch can be temporarily separated, and can be gradually combined, and it is also possible to rotate relative to each other during the transmission process. The clutch of this embodiment can be an electromagnetic clutch, a magnetic powder clutch, a friction clutch or a hydraulic clutch.

FIG2 is a schematic diagram of power transmission of a speed transmission device provided by some embodiments of the present application. As shown in FIG2, the rotating shaft 11 of the driving member 10 is connected to the output member 30 through the first clutch 41. When the first clutch 41 is engaged with the output member 30, the output power of the driving member 10 is transmitted to the wheel through the rotating shaft 11, the first clutch 41 and the output member 30. The rotating shaft 11 of the driving member 10 is connected to the first transmission member 20, and the first transmission member 20 is connected to the output member 30 through the second clutch 42. When the second clutch 42 is engaged with the output member 30, the output power of the driving member 10 is transmitted to the wheel through the rotating shaft 11, the first transmission member 20, the second clutch 42 and the output member 30. In this embodiment, by using the first transmission member 20 and different clutches, the switching of different gear transmission modes can be realized, and the structure of the first transmission member 20 is simple, the number of transmission members is reduced, and the structure of the speed transmission device is simpler, and the cost is reduced.

In some embodiments, as shown in FIG3 and FIG4 , FIG3 is a schematic diagram of the structure of the first transmission member provided in some embodiments of the present application, and FIG4 is a schematic diagram of the speed change transmission device provided in other embodiments of the present application. The first transmission member 20 includes a sun gear 21, a planetary gear 22 and a planet carrier 23, the sun gear 21 is connected to the rotating shaft 11 of the driving member 10, the planetary gear 22 is externally meshed with the sun gear 21, the planet carrier 23 is connected to the planetary gear 22, and the second clutch 42 includes a first sub-clutch 421, and the first sub-clutch 421 is used to connect the planet carrier 23 and the output member 30.

The first transmission member 20 is a planetary gear, which is a gear mechanism composed of a planetary gear 22 that revolves around a sun gear 21 and rotates on its own. The number of planetary gears 22 can be multiple, and the number of planetary gears 22 depends on the design load of the speed transmission device. The more the number, the greater the load. The sun gear 21 of the first transmission member 20 is located in the middle, and multiple first transmission members 20 are arranged around the sun gear 21. There is a common planet carrier 23 between the planetary gears, and the planetary gears 22 are specifically fixed on the planet carrier 23 through the planetary gear 22 shaft support. In addition to being able to rotate around their own rotation axis like fixed axis gears, their rotation axis also rotates around the axis of the sun gear 21 with the planet carrier 23. The rotation of the planetary gear 22 around its own axis is called "rotation", and the rotation around the axis of the sun gear 21 is called "revolution".

The sun gear 21 of this embodiment can be sleeved on the outer periphery of the rotating shaft 11 of the driving member 10, the first sub-clutch 421 is engaged with the output member 30, the rotating shaft 11 drives the sun gear 21 to rotate, the sun gear 21 drives the planetary gear 22 to rotate, the planetary gear 22 drives the planetary carrier 23 to rotate, the planetary carrier 23 drives the first sub-clutch 421 to rotate, the first sub-clutch 421 drives the output member 30 to rotate, and finally drives the wheels to rotate.

FIG5 is a schematic diagram of power transmission of a speed transmission device provided by other embodiments of the present application. As shown in FIG5 , in the above scheme, when the first sub-clutch 421 is engaged with the output member 30, the power output by the driving member 10 is transmitted to the wheel through the rotating shaft 11, the planetary gear 22, the planetary carrier 23, the first sub-clutch 421 and the output member 30. Through the transmission of the planetary gear 22 and the planetary carrier 23, the speed ratio of the output member 30 can be adjusted so that the wheel rotates at a preset speed, thereby improving the flexibility of the speed transmission device. Moreover, the structure of the first transmission member 20 itself is simple, which reduces the use of gears, further simplifies the speed transmission device, and reduces costs.

In some embodiments, the speed change transmission device further includes a first brake 51 , which is connected to the planet carrier 23 and is used to control the braking of the planet carrier 23 .

The brake is a mechanical part that has the function of slowing down, stopping or keeping the moving parts in a stopped state. After the first brake 51 of this embodiment works, the planet carrier 23 can be stopped from rotating to disconnect the power transmission.

In the above scheme, when the first sub-clutch 421 is not needed to work, the first brake 51 is used to control the planet carrier 23 to brake, the planet carrier 23 no longer rotates, and the planetary gear 22 can only rotate but not revolve, thereby changing the speed ratio of the output member 30. The control by the first brake 51 is convenient and fast, and the transmission efficiency of the speed transmission device is improved.

In some embodiments, the first transmission member 20 further includes a ring gear 24 that meshes with the planetary gear 22 , and the second clutch 42 further includes a second sub-clutch 422 that is used to connect the ring gear 24 and the output member 30 .

The planetary gear 22 is located on the inner side of the ring gear 24. When the first sub-clutch 421 is engaged with the output member 30, the rotating shaft 11 of the driving member 10 drives the sun gear 21 to rotate, the sun gear 21 drives the planetary gear 22 to rotate, the planetary gear 22 drives the ring gear 24 to rotate, the ring gear 24 drives the second sub-clutch 422 to rotate, the second sub-clutch 422 drives the output member 30 to rotate, and finally drives the wheels to rotate.

That is to say, when the first sub-clutch 421 is engaged with the output member 30, the planetary carrier 23 rotates, the ring gear 24 does not rotate, and the planetary gear 22 can both revolve along the sun gear 21 and rotate on its own; when the second sub-clutch 422 is engaged with the output member 30, the ring gear 24 rotates, the planetary carrier 23 does not rotate, and the planetary gear 22 can only rotate on its own, but cannot revolve. Therefore, when the second sub-clutch 422 is engaged with the output member 30, the speed ratio is lower than when the first sub-clutch 421 is engaged with the output member 30, and the output speed is higher. The first clutch 41 is directly connected to the rotating shaft 11 of the driving member 10 without gear transmission, so the speed ratio of the first clutch 41 is 1, and the speed ratios of the first sub-clutch 421, the second sub-clutch 422 and the first clutch 41 decrease in sequence, and the output speed increases in sequence. The first sub-clutch 421 corresponds to the first gear speed, the second sub-clutch 422 corresponds to the second gear speed, and the first clutch 41 corresponds to the third gear speed.

FIG6 is a schematic diagram of power transmission of a speed transmission device provided in some other embodiments of the present application. As shown in FIG6 , in the above scheme, when the second sub-clutch 422 is engaged with the output member 30, the power output by the driving member 10 is transmitted to the wheels through the rotating shaft 11, the planetary gear 22, the ring gear 24, the second sub-clutch 422 and the output member 30. Through the transmission of the planetary gear 22 and the ring gear 24, the speed ratio of the output member 30 is different from the speed ratio when the first sub-clutch 421 is working, so that the vehicle has a three-speed shift, and the wide speed ratio and efficiency of the vehicle are improved by increasing the gear position of the vehicle.

In some embodiments, the speed change transmission device further includes a second brake 52 , which is connected to the ring gear 24 and is used to control the braking of the ring gear 24 .

After the second brake 52 of this embodiment is operated, the planet carrier 23 can be stopped from rotating to disconnect the power transmission. When the second sub-clutch 422 is not needed to work, the ring gear 24 is braked by the second brake 52, and the ring gear 24 no longer rotates. At this time, the planet carrier 23 can rotate, and the planetary gear 22 can both revolve and rotate. The planet carrier 23 is engaged with the output member 30 through the first sub-clutch 421. The control by the second brake 52 is convenient and fast, and the transmission efficiency of the speed transmission device is improved.

FIG7 is a schematic diagram of the structure of a planetary gear provided in some embodiments of the present application. As shown in FIG7, in some embodiments, the planetary gear 22 includes a first sub-gear 221 and a second sub-gear 222 connected to each other, the first sub-gear 221 is externally meshed with the sun gear 21, and the second sub-gear 222 is internally meshed with the ring gear 24. The planetary gear 22 is a double gear, the first sub-gear 221 and the second sub-gear 222 are coaxial but separated by a certain distance to form an integrated structure, which can change the speed of the output member 30 and realize the adjustment of multiple speeds.

FIG8 is a schematic diagram of a speed change transmission device provided in some other embodiments of the present application. As shown in FIG8 , in some embodiments, the speed change transmission device further includes a differential 60 , and the differential 60 is connected to the output member 30 .

The differential 60 is a device composed of left and right half-shaft gears, two planetary gears and a gear rack. In four-wheel drive, in order to drive the four wheels, all gears must be connected. If the four wheels are mechanically connected together, the vehicle cannot rotate at the same speed when driving on a curve. In order to make the rotation speed of the vehicle basically consistent when driving on a curve, it is necessary to add a differential 60 to the center to adjust the speed difference between the left and right (or front and rear) wheels.

In the above solution, the differential 60 can enable the left and right (or front and rear) wheels to rotate at different speeds, thereby improving the driving performance and handling performance of the vehicle.

In some embodiments, the speed change transmission device further includes a second transmission member 70 , and the differential 60 is connected to the output member 30 via the second transmission member 70 .

The second transmission member 70 of this embodiment can be a gear or a connecting rod, that is, the output member 30 and the differential 60 can be gear transmission or chain transmission. The transmission efficiency can be improved by the transmission of the second transmission member 70, which is convenient for transmitting the power of the driving member 10 to the differential 60.

In some embodiments, the second transmission member 70 is a transmission gear, the differential 60 is provided with a differential gear, and the transmission gear and the differential gear are meshed with each other.

When the output member 30 is an output shaft, the transmission gear of this embodiment can be directly sleeved on the outer periphery of the output member 30 to drive the transmission gear to rotate through the output member 30. Specifically, the transmission gear can be a driving gear of a main reducer, which is an independent closed transmission device between the prime mover and the working machine, used to reduce the speed and increase the torque to meet the working needs.

In the above scheme, the gear transmission has high precision and efficiency and a compact structure, which further improves the transmission efficiency of the speed-changing transmission device and simplifies the device structure.

The second embodiment of the present application provides a vehicle, comprising a speed transmission device of any of the above embodiments. Since the vehicle adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

According to some embodiments of the present application, the present application provides a speed transmission device, including a driving member 10, a first transmission member 20, an output member 30 and a clutch assembly 40, wherein the driving member 10 has a rotating shaft 11; the first transmission member 20 is connected to the rotating shaft 11 of the driving member 10; the clutch assembly 40 includes a first clutch 41 and a second clutch 42, wherein the first clutch 41 is used to connect the rotating shaft 11 and the output member 30, and the second clutch 42 is used to connect the first transmission member 20 and the output member 30. The first transmission member 20 includes a sun gear 21, a planetary gear 22 and a planet carrier 23, wherein the sun gear 21 is connected to the rotating shaft 11 of the driving member 10, the planetary gear 22 is externally meshed with the sun gear 21, the planet carrier 23 is connected to the planetary gear 22, and the second clutch 42 includes a first sub-clutch 421, wherein the first sub-clutch 421 is used to connect the planet carrier 23 and the output member 30. The first transmission member 20 further includes a ring gear 24 , which is meshed with the planetary gear 22 . The second clutch 42 further includes a second sub-clutch 422 , which is used to connect the ring gear 24 and the output member 30 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A variable speed transmission device, characterized in that it comprises:

A driving member having a rotating shaft;

A first transmission member connected to the rotating shaft of the driving member;

Output

The clutch assembly comprises a first clutch and a second clutch, wherein the first clutch is used to connect the rotating shaft and the output member, and the second clutch is used to connect the first transmission member and the output member.
The speed change transmission device according to claim 1 is characterized in that the first transmission member includes a sun gear, a planetary gear and a planetary carrier, the sun gear is connected to the rotating shaft of the driving member, the planetary gear is meshed with the outside of the sun gear, the planetary carrier is connected to the planetary gear, and the second clutch includes a first sub-clutch, and the first sub-clutch is used to connect the planetary carrier and the output member.
The speed change transmission device according to claim 2 is characterized in that the speed change transmission device also includes a first brake, and the first brake is connected to the planetary carrier and is used to control the braking of the planetary carrier.
The speed change transmission device according to claim 2 is characterized in that the first transmission member further includes a ring gear, which is meshed with the planetary gear, and the second clutch further includes a second sub-clutch, which is used to connect the ring gear and the output member.
The speed change transmission device according to claim 4 is characterized in that the speed change transmission device also includes a second brake, and the second brake is connected to the ring gear and is used to control the braking of the ring gear.
The speed change transmission device according to claim 4 is characterized in that the planetary gear comprises a first sub-gear and a second sub-gear connected to each other, the first sub-gear is externally meshed with the sun gear, and the second sub-gear is internally meshed with the ring gear.
The speed change transmission device according to claims 1 to 6 is characterized in that the speed change transmission device further comprises a differential, and the differential is connected to the output member.
The speed change transmission device according to claim 7 is characterized in that the speed change transmission device also includes a second transmission member, and the differential is connected to the output member through the second transmission member.
The speed change transmission device according to claim 8 is characterized in that the second transmission member is a transmission gear, the differential is provided with a differential gear, and the transmission gear and the differential gear are meshed with each other.
A vehicle, characterized by comprising the speed change transmission device according to any one of claims 1 to 9.