Transmission device, power assembly, four-wheel drive assembly and vehicle

Abstract

The utility model discloses a transmission device, a power assembly, a four-wheel drive assembly and a vehicle, relates to the technical field of vehicles, and can solve the technical problem that the transmission efficiency is low when a planetary gear assembly is adopted for transmission between an existing wheel and a motor. The transmission device comprises a power device, a planetary gear assembly and a clutch device, the planetary gear assembly comprises a first input end and a first output end, the first input end is suitable for being connected with a second output end of the power device, and the first output end is suitable for being connected with a wheel end of a vehicle; the clutch device is arranged between the second output end of the power device and the first output end of the planetary gear assembly, and the clutch device has a coupling state and a disconnection state. When the clutch device is in the coupling state, the power device and the wheel end of the vehicle are in the coupling state; when the clutch device is in the disconnected state, the wheel ends of the vehicle and the power device are in the disconnected state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a transmission device, a power assembly, a four-wheel drive assembly and a vehicle. BACKGROUND

[0002] With the development of the new energy automobile industry, electric vehicles have become a development trend. In order to improve the space utilization rate inside the vehicle, a planetary gear assembly is used for transmission between the wheels and the motor in the related technology, which reduces the overall volume and weight of the vehicle. However, this transmission mode still has the technical problem of low transmission efficiency. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a transmission device, a power assembly, a four-wheel drive assembly and a vehicle to solve the technical problem of low transmission efficiency when the planetary gear assembly is used for transmission between the wheels and the motor in the prior art.

[0004] To achieve the above purpose, the present application adopts the following technical scheme:

[0005] In a first aspect, the present application provides a transmission device, which comprises a power device, a planetary gear assembly and a clutch device. The planetary gear assembly comprises a first input end and a first output end. The first input end is adapted to be connected to the second output end of the power device, and the first output end is adapted to be connected to the wheel end of the vehicle. The clutch device is arranged between the second output end of the power device and the first output end of the planetary gear assembly. The clutch device comprises a coupling state and a disconnection state.

[0006] When the clutch device is in the coupling state, the connection between the power device and the wheel end of the vehicle is in the coupling state. When the clutch device is in the disconnection state, the connection between the wheel end of the vehicle and the power device is in the disconnection state.

[0007] When the clutch device is in the coupling state, the power device and the wheel end of the vehicle are effectively connected through the planetary gear assembly.

[0008] Power is transmitted from the second output end of the power device to the first input end of the planetary gear assembly. After transmission inside the planetary gear assembly, the power is output from the first output end to the wheel end of the vehicle. In this process, the transmission path of the power is clear and efficient.

[0009] When the clutch device is in the disconnected state, the connection between the wheel end of the vehicle and the power device is cut off. When the vehicle is in some working conditions that do not require the power device to transmit power to the wheel (such as vehicle sliding, long downhill inertia driving, etc.), the planetary gear assembly stops working and will not be in a passive running state. The unnecessary energy loss caused by the passive running of the planetary gear assembly under the working conditions of vehicle sliding, long downhill, etc. is avoided, thereby improving the transmission efficiency and energy utilization efficiency of the entire transmission device.

[0010] In some embodiments, the planetary gear assembly comprises a housing, a ring gear, a sun gear, and a planet carrier having a planet gear, the planet gear being drivingly connected between the sun gear and the ring gear, and the planet carrier being drivingly connected with the planet gear. Among them, the first of the sun gear, the planet carrier and the ring gear is adapted to be connected with the second output end of the power device, the second of the sun gear, the planet carrier and the ring gear is adapted to be connected with the wheel end of the vehicle, and the third of the sun gear, the planet carrier and the ring gear is adapted to be connected with the housing.

[0011] In some embodiments, the sun gear is connected with the second output end of the power device, the planet carrier is connected with the wheel end of the vehicle, and the ring gear is connected with the housing.

[0012] In some embodiments, the clutch device is arranged between the housing and the ring gear, and the clutch device is used to couple or disconnect the connection between the housing and the ring gear.

[0013] In some embodiments, the first end of the clutch device is fixedly connected with the housing, and the second end of the clutch device is adapted to be coupled or disconnected with the ring gear.

[0014] In some embodiments, the clutch device is arranged between the planet carrier and the wheel end of the vehicle, and the clutch device is used to couple or disconnect the connection between the planet carrier and the wheel end of the vehicle.

[0015] In some embodiments, one end of the clutch device is fixedly connected with the planet carrier, and the other end of the clutch device is adapted to be coupled or disconnected with the wheel end of the vehicle.

[0016] In some embodiments, one end of the clutch device is fixedly connected with the wheel end of the vehicle, and the other end of the clutch device is adapted to be coupled or disconnected with the planet carrier.

[0017] In some embodiments, the ring gear is arranged in the housing, and the ring gear and the housing are of an integral structure.

[0018] In some embodiments, the clutch device is arranged between the sun gear and the second output end of the power device, and the clutch device is used to couple or disconnect the connection between the sun gear and the second output end of the power device.

[0019] In some embodiments, one end of the clutch device is fixedly connected to the sun gear, and the other end of the clutch device is adapted to be coupled to or disconnected from the second output end of the power device.

[0020] In some embodiments, one end of the clutch device is fixedly connected to the second output end of the power device, and the other end of the clutch device is adapted to be coupled to or disconnected from the sun gear.

[0021] In some embodiments, the ring gear is arranged in the housing, and the ring gear and the housing are in an integral structure.

[0022] In some embodiments, the planetary gear of the present application comprises coaxially arranged first and second gears, the first gear is engaged with the sun gear, and the second gear is engaged with the ring gear.

[0023] In some embodiments, the diameter of the first gear is greater than the diameter of the second gear.

[0024] In some embodiments, the clutch device comprises a one-way clutch device, when the one-way clutch device is in the coupled state, the connection between the power device and the wheel end of the vehicle is in the coupled state; when the one-way clutch device is in the disconnected state, the connection between the wheel end of the vehicle and the power device is in the disconnected state.

[0025] In some embodiments, the clutch device comprises a two-way clutch device, when the two-way clutch device is in the coupled state, the vehicle is in the first mode, the power of the power device is transmitted to the wheel end of the vehicle through the planetary gear assembly; when the two-way clutch device is in the coupled state, the vehicle is in the second mode, the power of the wheel end of the vehicle is transmitted to the power device through the planetary gear assembly, the power device converts mechanical energy into electrical energy and stores it in the energy storage device; when the two-way clutch device is in the disconnected state, the connection between the wheel end of the vehicle and the power device is in the disconnected state.

[0026] In the second aspect of the present application, the present application provides a power assembly, which comprises the transmission device described above.

[0027] In some embodiments, the power assembly comprises a first transmission device and a second transmission device, the first transmission device comprises the transmission device described above, and the second transmission device comprises the transmission device described above; the first transmission device and the second transmission device are coaxially arranged.

[0028] In the third aspect of the present application, the present application provides a four-wheel drive assembly, which comprises the power assembly described above, and the power assembly is arranged on the front axle and / or the rear axle of the vehicle.

[0029] In the fourth aspect of the present application, the present application provides a vehicle, which comprises the power assembly described above or the four-wheel drive assembly described above.

[0030] It should be noted that the technical effects brought by the implementation manners of the second aspect to the fourth aspect can refer to the technical effects brought by the corresponding implementation manners in the first aspect, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0032] Figure 1 One of the schematic diagrams of vehicle transmission provided for some embodiments of the present application;

[0033] Figure 2 The second schematic diagram of vehicle transmission provided for some embodiments of the present application;

[0034] Figure 3 The third schematic diagram of vehicle transmission provided for some embodiments of the present application;

[0035] Figure 4 The fourth schematic diagram of vehicle transmission provided for some embodiments of the present application;

[0036] Figure 5 The fifth schematic diagram of vehicle transmission provided for some embodiments of the present application;

[0037] Figure 6 The sixth schematic diagram of vehicle transmission provided for some embodiments of the present application.

[0038] Reference signs:

[0039] 1 - first power device; 2 - second power device; 3 - first transmission device; 4 - second transmission device;

[0040] 100 - planetary gear assembly; 101 - ring gear; 102 - sun gear; 103 - planet carrier; 104 - first gear; 105 - second gear;

[0041] 200 - housing;

[0042] 300 - one-way clutch device;

[0043] 400 - two-way clutch device. DETAILED DESCRIPTION

[0044] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or relative position shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified, the above orientation description can be flexibly arranged in the actual application process under the condition of meeting the relative position relationship shown in the drawings.

[0046] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "communicating" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements inside. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the embodiments of the present application, the terms "including", "containing" or any other variant thereof are intended to cover non-exclusive containing, so that the process, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, article or device. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, article or device including the element.

[0049] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the embodied words are used to present concepts in a concrete manner.

[0050] In the description of the specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0051] In some embodiments, the present application provides a vehicle, which includes a power assembly, the power assembly is the core part of the vehicle in each major system of the vehicle, the power assembly can generate power and transmit the power to the wheel end of the vehicle, i.e., the wheel of the vehicle, after the wheel obtains the power, the vehicle can normally travel.

[0052] The present application is exemplarily illustrated by a pure electric vehicle, and the vehicle in the present application can also be a hybrid vehicle, which is not limited herein.

[0053] Exemplarily, for a pure electric vehicle, the motor is one of the sources of power, and the power generated by the motor can be transmitted to the wheel end of the vehicle, so that the vehicle can travel on the road.

[0054] In some embodiments, the power assembly in the present application includes a transmission device, which is responsible for transmitting the power generated by the motor to the wheel end of the vehicle, so that the wheel end of the vehicle obtains power to rotate.

[0055] In some embodiments, the power assembly in the present application includes a first transmission device 3 and a second transmission device 4.

[0056] Exemplarily, the first transmission device 3 and the second transmission device 4 are structurally consistent.

[0057] Further, the first transmission device 3 and the second transmission device 4 are coaxially arranged.

[0058] Wherein, "coaxially arranged" means that the center axes of the first transmission device 3 and the second transmission device 4 are coincident. When the two transmission devices are coaxially arranged, the power transmission of the first transmission device 3 and the second transmission device 4 can be more stable.

[0059] Exemplarily, the first transmission device 3 and the second transmission device 4 are the same structure of transmission, and the transmission of the two uses gear transmission. The first transmission device 3 and the second transmission device 4 are coaxial, and the corresponding gears are also coaxially arranged. In the meshing process, the force direction between the tooth surfaces is relatively stable, and vibration or jumping caused by uneven force is not easy to occur.

[0060] In some embodiments, the vehicle of the present application comprises a four-wheel drive assembly, for example, when the vehicle has four wheels, the four-wheel drive assembly is configured to distribute the power generated by the vehicle to the four wheels of the vehicle.

[0061] In different road conditions and driving states, the four-wheel drive assembly can dynamically adjust the power share obtained by each wheel according to the needs of the vehicle.

[0062] For example, when the vehicle is off-road, the four-wheel drive assembly can evenly distribute power to the four wheels to enhance the passability of the vehicle; when the vehicle is turning, more power can be distributed to the outer wheels to improve the handling of the vehicle.

[0063] In some embodiments, the four-wheel drive assembly of the present application comprises the power assembly described above, which is arranged on the front axle and / or rear axle of the vehicle. It can be understood that the power assembly can be arranged on the front axle of the vehicle, or on the rear axle of the vehicle, or on both the front axle and the rear axle of the vehicle, and the present application does not limit it.

[0064] For example, the power assembly is arranged on the front axle of the vehicle.

[0065] For example, the power assembly is arranged on the rear axle of the vehicle.

[0066] In some embodiments, referring to Figure 1 , the X direction in the figure is the length direction of the vehicle, and the wheel end of the vehicle of the present application comprises a first wheel train and a second wheel train arranged side by side and spaced apart along the width direction of the vehicle.

[0067] It should be noted that the first wheel train and the second wheel train of the present application can also be a first wheel train and a second wheel train arranged side by side and spaced apart along the length direction of the vehicle, and the present application does not limit it.

[0068] In some embodiments, the power assembly of the present application further comprises a power device and a transmission device, and the power generated by the power device can be transmitted to the wheel end of the vehicle through the transmission device.

[0069] For example, the power assembly of the present application further comprises a first power device 1 and a first transmission device 3, and the power assembly of the present application further comprises a second power device 2 and a second transmission device 4.

[0070] For example, the first power device 1 and the second power device 2 are both motors.

[0071] For example, the first transmission device 3 and the second transmission device 4 have the same structure, and the power assembly mentioned below can be the first transmission device 3 or the second transmission device 4.

[0072] Exemplarily, the transmission in the present application is a reducer.

[0073] Exemplarily, the transmission in the present application is a reducer.

[0074] In some embodiments, referring to Figure 1 , the transmission in the present application comprises a planetary gear assembly 100, the planetary gear assembly 100 comprises a first input end and a first output end, the first input end is adapted to be connected to the second output end of the power device, and the first output end is adapted to be connected to the wheel end of the vehicle.

[0075] That is, the power device transmits power to the wheel end of the vehicle through the planetary gear assembly 100.

[0076] The transmission in the present application adopts the planetary gear assembly 100 for transmission, which can realize a larger transmission ratio range in a more compact volume compared with other transmission modes. In the case of limited vehicle size, the adoption of the planetary gear assembly 100 for transmission effectively integrates multiple gear settings with different transmission ratios, saves valuable space in the vehicle, and makes the overall layout of the vehicle more reasonable. Moreover, the contact stress distribution between the gears of the planetary gear assembly 100 is more reasonable, so that the power can be smoothly transmitted from the input shaft to the output shaft.

[0077] In the conventional planetary gear assembly transmission mode, when the wheel and the power device are connected through the planetary gear transmission, there are still some conditions that will lead to a decrease in transmission efficiency.

[0078] For example, when the vehicle is in vehicle coasting, the planetary gear assembly 100 is still in a passive running state. Due to the engagement between the planetary gears, the relative movement between the planetary gears, and the connection with other components, even when power transmission is not required, energy loss such as friction and stirring of lubricating oil will occur, and this unnecessary energy loss will lead to a decrease in transmission efficiency.

[0079] In order to further solve the above problems, in some embodiments, the transmission in the present application comprises a clutch device, the clutch device is arranged between the second output end of the power device and the first output end of the planetary gear assembly 100, and the clutch device comprises a coupling state and a disconnection state.

[0080] When the clutch device is in the coupling state, the connection between the power device and the wheel end of the vehicle is in the coupling state; when the clutch device is in the disconnection state, the connection between the wheel end of the vehicle and the power device is in the disconnection state.

[0081] Correspondingly, the first input end of the planetary gear assembly 100 in the first transmission device 3 is connected to the second output end of the first power device 1, and the first output end of the planetary gear assembly 100 transmits power to the first wheel train.

[0082] The first input end of the planetary gear assembly 100 in the second transmission device 4 is connected with the second output end of the second power device 2, and the first output end of the planetary gear assembly 100 in the second transmission device 4 transmits power to the second wheel train.

[0083] When the clutch device is in the coupling state, the power at the output end of the power device can be transmitted to the wheel end of the vehicle through the planetary gear assembly 100; when the clutch device is in the disconnection state, the output end of the power device can be disconnected from the wheel end of the vehicle through the planetary gear assembly 100.

[0084] When the vehicle starts, the power of the power device can be smoothly transmitted to the wheel end of the vehicle through the planetary gear assembly 100 by switching the clutch device to the coupling state, and the vehicle is driven to move forward. When the vehicle is sliding or needs to cut off the power transmission, such as when the vehicle is running on an inclined slope by inertia, the clutch device is disconnected, and the power device no longer outputs power to the wheel end of the vehicle, thereby reducing unnecessary power interference and improving the energy utilization rate of the vehicle.

[0085] In a transmission system, when a certain component is forced to rotate without the need for power transmission, drag energy loss occurs.

[0086] Specifically, taking the rear drive of the transmission device in the present application as an example, when the power generated by the front drive of the vehicle can meet the power demand of the vehicle, the present application cuts off the power transmission of the rear drive transmission device through the clutch device, and the wheel end of the vehicle is no longer connected with the motor of the rear drive, so that the rotation of the wheel end of the vehicle will not drag the motor in the reverse direction, thereby avoiding the drag energy generated by the corresponding wheel end of the rear drive of the vehicle to the motor of the rear drive, and reducing the energy consumption of the vehicle.

[0087] In some embodiments, the planetary gear assembly 100 includes a housing 200, a ring gear 101, a sun gear 102, and a planet carrier 103 having planet gears, the planet gears being drivingly connected between the sun gear 102 and the ring gear 101, and the planet carrier 103 being drivingly connected with the planet gears.

[0088] The corresponding first power input end of the planetary gear assembly 100 can be any one of the sun gear 102, the planet carrier 103, and the ring gear 101, and correspondingly, the first power output end of the planetary gear assembly 100 can be one of the remaining two.

[0089] That is, the first one of the sun gear 102, the planet carrier 103, and the ring gear 101 is adapted to be connected with the second output end of the power device, the second one of the sun gear 102, the planet carrier 103, and the ring gear 101 is adapted to be connected with the wheel end of the vehicle, and the third one of the sun gear 102, the planet carrier 103, and the ring gear 101 is adapted to be connected with the housing 200.

[0090] It can be understood that the sun gear 102 can be a power output end or a power input end.

[0091] Correspondingly, the planet carrier 103 can be a power output end or a power input end.

[0092] Meanwhile, the ring gear 101 can also be a power output end or a power input end.

[0093] Further, the ring gear 101 is coaxially arranged with the sun gear 102.

[0094] The planetary gear assembly 100 further comprises a planet gear and a planet carrier 103, the planet gear is located between the sun gear 102 and the ring gear 101, the planet gear is engaged with the ring gear 101 and the sun gear 102, the planet gear is rotatably connected to the planet carrier 103, and the planet carrier 103 is rotatable relative to the ring gear 101.

[0095] Further, the rotation axis of the planet carrier 103 is coaxially arranged with the rotation axis of the sun gear 102.

[0096] The main function of the ring gear 101 is to engage with the planet gear and provide constraint and guidance for the movement of the planet gear.

[0097] For example, power is input through the sun gear 102, when the sun gear 102 starts to rotate, since the planet gear is engaged with the sun gear 102, the planet gear will revolve around the sun gear 102 under the driving of the sun gear 102, and since the planet gear is also engaged with the ring gear 101, it will also rotate itself. The compound motion of revolution and rotation makes the planet gear transmit power to the planet carrier 103 or the ring gear 101.

[0098] In the planetary gear assembly 100, the clutch device can be used to control the transmission of the sun gear 102, the transmission of the planet carrier 103, and the rotation of the ring gear 101 to control the transmission of the entire planetary gear set.

[0099] In some embodiments, the planetary gear assembly 100 can have different transmission effects by setting the direction of the planetary gear assembly 100.

[0100] For example, in the above power transmission process, the sun gear 102 is connected with the second output end of the power device, the planet carrier 103 is connected with the wheel end of the vehicle, and the ring gear 101 is connected with the housing 200.

[0101] At this time, the planetary gear assembly 100 is a reducer, when the sun gear 102 is powered by the power device to start rotating, since the ring gear 101 is fixed, the planetary gears both revolve around their own axes and revolve around the sun gear 102. In this process, the rotation speed of the planet carrier 103 will be lower than that of the sun gear 102. That is, after the power from the power device is transmitted into the planetary gear assembly 100 through the sun gear 102, the rotation speed transmitted to the planet carrier 103 (and then to the wheel end of the vehicle) is reduced through this special movement mode of the planetary gears, thereby achieving the effect of deceleration, so the planetary gear assembly 100 at this time plays the role of a reducer.

[0102] In some embodiments, a clutch device is arranged between the housing 200 and the ring gear 101, and the clutch device is used to couple or disconnect the connection between the housing 200 and the ring gear 101. The clutch device controls the rotation of the ring gear 101, which means that the motion state (fixed, rotating, etc.) of the ring gear 101 can be changed, thereby affecting the transmission of the entire planetary gear set.

[0103] When the ring gear 101 is controlled by the clutch device to be in a fixed state, the movement mode of the planetary gears revolving around the sun gear 102 and revolving around their own axes will produce a specific power transmission effect and transmission ratio based on this.

[0104] When the ring gear 101 is changed to a rotatable state by the clutch device, the originally fixed ring gear 101 can now rotate freely. When the planetary gears revolve around the sun gear 102 under the drive of the sun gear 102, since the ring gear 101 no longer provides fixed constraints, the rotation and revolution of the planetary gears become irregular, and the motion path and speed of the planetary gears cannot be controlled in the original way, resulting in that the planetary gears cannot stably transmit power as normal, thereby making the entire planetary gear set unable to effectively transmit power.

[0105] In some embodiments, the first end of the clutch device is fixedly connected with the housing 200, and the second end of the clutch device is adapted to be coupled or disconnected with the ring gear 101.

[0106] It can be understood that the clutch device has two ends, of which the first end is fixedly connected with the housing 200, which means that the position of the first end of the clutch device is relatively fixed. The second end of the clutch device can be coupled or disconnected with the ring gear 101, just like a device with a switch function, one end is fixed on a stable housing 200, and the other end can contact and connect with the ring gear 101 to enable the ring gear 101 to obtain power-related input, or can be disconnected to make the ring gear 101 not affected by this power-related factor.

[0107] In some embodiments, a clutch device is arranged between the planetary carrier 103 and the wheel end of the vehicle, and the clutch device is used to couple or disconnect the connection between the planetary carrier 103 and the wheel end of the vehicle.

[0108] In one aspect, the clutch device can couple the planetary carrier 103 and the wheel end of the vehicle, so that the power is smoothly transmitted to the wheel through the planetary carrier 103, realizing the normal driving of the vehicle. In another aspect, the clutch device can disconnect the transmission between the planetary carrier 103 and the wheel end of the vehicle.

[0109] Exemplarily, one end of the clutch device is fixedly connected with the planetary carrier 103, and the other end of the clutch device is adapted to be coupled or disconnected with the wheel end of the vehicle.

[0110] In this structure, the planetary carrier 103 is a relatively fixed connection point of the clutch device, and the clutch device is like a controllable connection component extending from the planetary carrier 103, and the focus is on controlling whether the power of the planetary carrier 103 is transmitted to the wheel end of the vehicle.

[0111] Exemplarily, one end of the clutch device is fixedly connected with the wheel end of the vehicle, and the other end of the clutch device is adapted to be coupled or disconnected with the planetary carrier 103.

[0112] At this time, the wheel end of the vehicle is a fixed starting point of the clutch device, and the clutch device is mainly used to control whether the power of the planetary carrier 103 is connected to the wheel end of the vehicle, and the focus is on the access control of the power of the planetary carrier 103.

[0113] In some embodiments, the ring gear 101 is arranged in the housing 200, and the ring gear 101 and the housing 200 are in an integrated structure.

[0114] During the operation of the planetary gear assembly 100, the ring gear 101 will bear the force from the planetary gears. Since the ring gear 101 and the housing 200 are integrated, this structure can better bear these forces.

[0115] In some embodiments, a clutch device is arranged between the sun gear 102 and the second output end of the power device, and the clutch device is used to couple or disconnect the connection between the sun gear 102 and the second output end of the power device.

[0116] Exemplarily, when the clutch device is used to control the transmission of the sun gear 102, it can realize the switching of the connection state between the sun gear 102 and the power device. In the coupled state, the power output by the power source can be smoothly transmitted to the sun gear 102, so that the sun gear 102 starts to rotate.

[0117] Exemplarily, one end of the clutch device is fixedly connected with the sun gear 102, and the other end of the clutch device is adapted to be coupled or disconnected with the second output end of the power device.

[0118] In this connection mode, when the clutch device is disconnected, the sun gear 102 is relatively independent of the second output end of the power device. Even if the second output end of the power device is in operation, the sun gear 102 will not be directly affected by the power thereof. This enables the planetary gear assembly 100 to maintain an independent state when the sun gear 102 is stationary.

[0119] The vehicle can stop the sun gear 102 by disconnecting the clutch device, so that other components in the planetary gear assembly 100, such as the planet carrier 103 and the ring gear 101, are not disturbed by the power of the sun gear 102, thereby achieving a specific power transmission mode or vehicle driving state.

[0120] When the clutch device is coupled, the power of the second output end of the power device is transmitted to the sun gear 102, and the planetary gear assembly 100 starts to work. In this case, the working state of the planetary gear assembly 100 is controlled by the clutch device connecting the power from the sun gear 102 side, and for the entire planetary gear assembly 100, the power is activated from the sun gear 102 side. The start of power transmission is more focused on the sun gear 102 side, and only when the clutch device is coupled, the power will flow from the second output end of the power device to the sun gear 102, thereby driving the entire planetary gear assembly 100.

[0121] Further, one end of the clutch device is fixedly connected to the second output end of the power device, and the other end is adapted to be coupled or disconnected with the sun gear 102.

[0122] When the clutch device is disconnected, the sun gear 102 is disconnected from the second output end of the power device, and the power cannot be transmitted to the sun gear 102. However, unlike the former, the power of the second output end of the power device still exists at this time, but it is not transmitted to the sun gear 102. The sun gear 102 in the planetary gear assembly 100 is in a state of waiting for power connection, and the entire planetary gear assembly 100 is stationary because the power is not transmitted from the second output end of the power device. That is, the power first starts from the second output end of the power device, and the clutch device controls whether to connect with the sun gear 102 to start the power transmission of the planetary gear assembly 100.

[0123] Similarly, at this time, the ring gear 101 is arranged in the housing 200, and the ring gear 101 and the housing 200 are in an integrated structure.

[0124] In some embodiments, referring to Figure 1 , the clutch device is a one-way clutch device 300, and when the one-way clutch device 300 is in a coupled state, the connection between the power device and the wheel end of the vehicle is in a coupled state. When the one-way clutch device 300 is in a disconnected state, the connection between the wheel end of the vehicle and the power device is in a disconnected state.

[0125] That is, when the clutch device is in the coupled state, the power at the output end of the power device is transmitted to the input end of the planetary gear assembly, and the input end of the planetary gear assembly allows the power rotating in the first direction to be transmitted to the output end of the planetary gear assembly 100.

[0126] The power entering from the input end of the planetary gear assembly is, inside the planetary gear assembly, allowed to be transmitted to the output end of the planetary gear assembly 100 in the first direction. The first direction here is a specific direction determined based on the structure of the planetary gear assembly itself and the transmission design.

[0127] And the output end of the planetary gear assembly 100 is allowed to rotate in the second direction, and the power rotating in the reverse direction of the second direction of the output end of the planetary gear assembly 100 is prevented from being transmitted to the input end of the planetary gear assembly.

[0128] And, in the process, the output end of the planetary gear assembly 100 is allowed to rotate in the second direction. The second direction here is also a specific direction different from the first direction, which is determined based on the overall transmission architecture of the planetary gear assembly.

[0129] The one-way clutch device 300 is a special clutch mechanism, which is different from ordinary clutch devices in that it has a directional power transmission characteristic.

[0130] The one-way clutch device 300 prevents the power rotating in the reverse direction of the second direction of the output end of the planetary gear assembly 100 from being transmitted to the input end of the planetary gear assembly. That is, when the output end appears power trying to rotate in the reverse direction of the second direction (that is, the direction opposite to the second direction of the normal output end rotation set), the one-way clutch device 300 will play its one-way blocking role, not allowing such reverse power to be transmitted back to the input end in reverse. In some embodiments, referring to the figure, the clutch device is a two-way clutch device. 400 When the two-way clutch device is in the coupled state, the vehicle is in the first mode, the power device is in the driving mode, and the power of the power device is transmitted to the wheel end of the vehicle through the planetary gear assembly 100.

[0131] When the two-way clutch device is in the coupled state, the vehicle is in the second mode, the power of the wheel end of the vehicle is transmitted to the power device through the planetary gear assembly 100, the power device is in the power generation mode, and the power device converts mechanical energy into electrical energy and stores it in the energy storage device.

[0132] When the two-way clutch device is in the decoupled state, the connection between the wheel end of the vehicle and the power device is in the decoupled state.

[0133] When the clutch device is in the coupled state, the power at the output end of the power device is transmitted to the input end of the planetary gear assembly, the input end of the planetary gear assembly allows the power rotating in the first direction to be transmitted to the output end of the planetary gear assembly 100, and makes the output end of the planetary gear assembly 100 rotate in the second direction, and allows the power rotating in the opposite direction of the second direction of the output end of the planetary gear assembly 100 to be transmitted to the input end of the planetary gear assembly 100, and makes the input end of the planetary gear assembly 100 rotate in the opposite direction of the first direction.

[0134] The power entering from the input end of the planetary gear assembly is allowed to be transmitted to the output end of the planetary gear assembly 100 in the first direction inside the planetary gear assembly.

[0135] At the same time that the power transmission makes the output end of the planetary gear assembly 100 rotate in the second direction, the bidirectional clutch device also allows the power rotating in the opposite direction of the second direction of the output end of the planetary gear assembly 100 to be transmitted to the input end of the planetary gear assembly 100. This means that when the power rotating in the opposite direction of the second direction appears at the output end of the planetary gear assembly 100, this reverse power will not be blocked, but can be transmitted in reverse through the bidirectional clutch device to the input end of the planetary gear assembly 100.

[0136] And when this reverse power is transmitted to the input end of the planetary gear assembly 100, it will make the input end of the planetary gear assembly 100 rotate in the opposite direction of the first direction. The bidirectional clutch device not only allows the power to be transmitted in reverse between the output end and the input end, but also can make the input end make corresponding rotating action according to the received reverse power.

[0137] When the vehicle starts to decelerate, the bidirectional clutch device can timely keep the planetary gear assembly and the motor in a suitable connected state, so that the kinetic energy of the vehicle can be effectively transmitted to the motor through the planetary gear assembly.

[0138] For example, during the deceleration braking process of an electric vehicle, the bidirectional clutch device ensures that the rotating kinetic energy of the wheels can be transmitted to the motor through the planetary gear assembly, and the motor switches to the power generation mode after receiving the kinetic energy, converts the kinetic energy into electrical energy and stores it, realizes the energy feedback of the motor, and improves the energy utilization efficiency of the vehicle, prolongs the cruising range of the vehicle.

[0139] In some embodiments, the planetary gear includes a first gear 104 and a second gear 105 coaxially arranged, the first gear 104 is engaged with the sun gear 102, and the second gear 105 is engaged with the ring gear 101.

[0140] The first gear 104 and the second gear 105 are arranged in the same direction as the extension direction of the rotation shaft of the sun gear 102, and the first gear 104 is located at the periphery of the sun gear 102 and meshes with the sun gear 102, and the second gear 105 is located in the ring gear 101 and meshes with the ring gear 101.

[0141] The first gear 104 is located at the periphery of the sun gear 102 and meshes with the sun gear 102. Exemplarily, the sun gear 102 serves as the core power input component of the planetary gear assembly 100, and when power is transmitted to the sun gear 102, the power can be transmitted out through the meshing with the first gear 104, and the first gear 104 rotates around the sun gear 102 while also rotating itself, and the second gear 105 is located in the ring gear 101 and meshes with the ring gear 101.

[0142] The ring gear 101 also plays an important role in the planetary gear assembly 100, and it restricts the movement of the planetary gears together with the sun gear 102. The meshing of the second gear 105 with the ring gear 101 provides another path for power transmission of the planetary gear assembly 100, and also affects the transmission ratio and power output characteristics of the entire assembly to some extent.

[0143] In some embodiments, the diameter of the first gear 104 is greater than the diameter of the second gear 105. The first gear 104 and the second gear 105

[0144] Because the first gear 104 has a larger diameter, when it meshes with the sun gear 102 to transmit power, according to the principle that torque is equal to force multiplied by force arm, it can produce a relatively large torque transmission effect under the same power input. In contrast, the second gear 105 has a smaller diameter, and the torque transmitted when it meshes with the ring gear 101 is relatively small. This difference allows the planetary gear assembly 100 to distribute torque according to different needs during power transmission.

[0145] This design of the first gear 104 having a larger diameter than the second gear 105 is beneficial to realizing a more compact spatial layout while ensuring the performance of the planetary gear assembly 100. The larger-diameter first gear 104 can be better distributed around the sun gear 102 to fully utilize the peripheral space for power transmission, and the smaller-diameter second gear 105 can be reasonably placed inside the ring gear 101, avoiding the problem of a bulky entire assembly due to the excessively large size of the planetary gears.

[0146] In some embodiments, the motor includes a power output shaft adapted to output power.

[0147] The following specifically describes the embodiments that can be implemented in the present application:

[0148] Embodiment One:

[0149] Referring to Figure 1 and Figure 2 , Figure 1 In the case of the clutch device in this embodiment being a one-way clutch device 300, Figure 2 In the case of the clutch device in this embodiment being a two-way clutch device.

[0150] The transmission device in this application further comprises a housing 200, the planetary gear assembly 100 is arranged in the housing 200, and the clutch device is arranged between the housing 200 and the ring gear 101.

[0151] Exemplarily, the housing 200 is the housing 200 of the speed reducer.

[0152] When the clutch device is in the coupling state, it can fixedly connect the ring gear 101 and the housing 200, so that the ring gear 101 remains in a stationary state during the operation of the planetary gear assembly 100.

[0153] In this case, the sun gear 102 inputs power, and the planetary gears revolve around the sun gear 102 and rotate by themselves due to the fixed ring gear 101 under the drive of the sun gear 102. The compound motion of the planetary gears is output through the planet carrier 103, and the fixed transmission ratio is determined according to the tooth number ratio among the sun gear 102, the planetary gears and the ring gear 101.

[0154] When the clutch device is switched to the disengaged state, the ring gear 101 is no longer fixed on the housing 200, but can rotate freely. At this time, the motion state of the planetary gears will change. Since the ring gear 101 can rotate, the revolution and rotation of the planetary gears are no longer constrained by the fixed ring gear 101, and the entire planetary gear assembly 100 cannot form a fixed transmission ratio and cannot transmit power.

[0155] Exemplarily, when the clutch device is in the coupling state, when the power output shaft transmits power to the planetary gear assembly 100, the power is transmitted to the sun gear 102 via the clutch assembly, the sun gear 102 transmits the power to the first gear 104, the first gear 104 transmits the power to the second gear 105, the second gear 105 transmits the power to the planet carrier 103, and the planet carrier 103 transmits the power to the power output end of the entire transmission device.

[0156] Embodiment Two:

[0157] Referring to Figure 3 and Figure 4 , Figure 3 In the case of the clutch device in this embodiment being a one-way clutch device 300, Figure 4 In the case of the clutch device in this embodiment being a two-way clutch device.

[0158] The transmission device in the present application further comprises a housing 200, the planetary gear assembly 100 is arranged in the housing 200, and the ring gear 101 is fixed to the housing 200.

[0159] The planet carrier 103 comprises a first part and a second part, the planetary gears are rotatably connected to the first part, and the clutch device is arranged between the first part and the second part, and the second part forms an output end of the planetary gear assembly 100.

[0160] It can be understood that, in the present embodiment, the clutch device controls the transmission of the planet carrier 103.

[0161] It can be understood that, when the clutch device is in the coupling state, the first part and the second part of the planet carrier 103 are connected together, and the power transmitted by the first part can be smoothly output through the second part, so as to realize a complete power transmission link.

[0162] When the clutch device is in the decoupling state, the connection between the first part and the second part of the planet carrier 103 is cut off, and at this time, the power transmitted by the planetary gears to the first part cannot be output through the second part, so as to interrupt the transmission of the power.

[0163] Exemplarily, when the clutch device is in the coupling state, when the power output shaft transmits power to the planetary gear assembly 100, the power is transmitted to the sun gear 102, the sun gear 102 transmits the power to the first gear 104, the first gear 104 transmits the power to the second gear 105, the second gear 105 transmits the power to the planet carrier 103, and the planet carrier 103 transmits the power to the power output end of the entire transmission device through the clutch device.

[0164] Embodiment three:

[0165] Continuing to refer to Figure 5 and Figure 6 , Figure 5 in the case where the clutch device in the present embodiment is a one-way clutch device 300, Figure 6 in the case where the clutch device in the present embodiment is a two-way clutch device.

[0166] The sun gear 102 in the present application forms one of the input end and the output end of the planetary gear assembly 100, and the ring gear 101 forms the other of the input end and the output end of the planetary gear assembly 100.

[0167] The transmission device in the present application further comprises a housing 200, the planetary gear assembly 100 is arranged in the housing 200, and the clutch device is arranged between the housing 200 and the planet carrier 103.

[0168] It can be understood that in this case, the clutch device actually controls whether the ring gear 101 rotates, when the ring gear 101 cannot rotate relative to the housing 200, the entire planetary gear assembly 100 has a fixed transmission ratio, and the first gear 104 and the second gear 105 can transmit power from the sun gear 102.

[0169] When the ring gear 101 can rotate relative to the housing 200, the entire planetary gear assembly 100 has no fixed transmission ratio, and the first gear 104 and the second gear 105 cannot transmit power from the sun gear 102.

[0170] Exemplarily, the one-way clutch device 300 includes a one-way clutch inner ring and a one-way clutch outer ring, and the ring gear 101 is fixed with the one-way clutch, when the one-way clutch inner ring can rotate relative to the one-way clutch outer ring, the ring gear 101 is in an unlocked state, and when the ring gear 101 can rotate relative to the housing 200, the entire planetary gear assembly 100 has no fixed transmission ratio, and the first gear 104 and the second gear 105 cannot transmit power from the sun gear 102.

[0171] When the one-way clutch inner ring is locked relative to the one-way clutch outer ring, the ring gear 101 is in a locked state, and when the ring gear 101 is locked relative to the housing 200, the entire planetary gear assembly 100 has a transmission ratio, and the first gear 104 and the second gear 105 can transmit power from the sun gear 102.

[0172] When the clutch device is in the coupled state, a connection is established between the planetary carrier 103 and the housing 200 through the clutch device, so that power transmission inside the planetary gear assembly 100 can be smoothly carried out. For example, when the sun gear 102 inputs power as an input end, the power is transmitted to the planetary carrier 103 through the movement of the planetary gear, and since the clutch device is in the coupled state, the planetary carrier 103 can continue to transmit the power, and finally realize a complete power transmission link from the sun gear 102 to the ring gear 101 (or vice versa).

[0173] During the period of vehicle coasting or not needing power transmission, by disconnecting the clutch device, the ring gear 101 and the sun gear 102 cannot transmit power, avoiding unnecessary power loss, so that the vehicle can more effectively utilize inertia coasting.

[0174] Exemplarily, when the clutch device is in the coupled state, when the power output shaft transmits power to the planetary gear assembly 100, the power is transmitted to the sun gear 102, the sun gear 102 transmits the power to the first gear 104, the first gear 104 transmits the power to the second gear 105, the second gear 105 transmits the power to the planetary carrier 103, and the planetary carrier 103 transmits the power to the entire transmission device through the clutch device.

[0175] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A transmission device, characterized in that: include: Power plant; A planetary gear assembly (100), comprising a first input end and a first output end, wherein the first input end is adapted to be connected to a second output end of a power device, and the first output end is adapted to be connected to a wheel end of a vehicle; a clutch device, the clutch device being provided between the second output end of the power device and the first output end of the planetary gear assembly (100), the clutch device including a coupled state and a disconnected state; When the clutch device is in the coupled state, the connection between the power unit and the wheel end of the vehicle is in the coupled state; When the clutch device is in the disconnected state, the connection between the wheel end of the vehicle and the power device is in a disconnected state.

2. The transmission device according to claim 1, characterized in that The planetary gear assembly (100) comprises: Housing (200); Ring gear (101); Sun gear (102); A planet carrier (103) having planetary gears, wherein the planetary gears are transmission-connected between the sun gear (102) and the ring gear (101), and the planet carrier (103) is transmission-connected to the planetary gears; The first one of the sun gear (102), the planet carrier (103) and the ring gear (101) is suitable for being connected to the second output end of the power device, the second one of the sun gear (102), the planet carrier (103) and the ring gear (101) is suitable for being connected to the wheel end of the vehicle, and the third one of the sun gear (102), the planet carrier (103) and the ring gear (101) is suitable for being connected to the housing (200).

3. The transmission device according to claim 2, characterized in that: The sun gear (102) is connected to the second output end of the power device, the planet carrier (103) is connected to the wheel end of the vehicle, and the ring gear (101) is connected to the housing (200).

4. The transmission device according to claim 2, characterized in that: The clutch device is arranged between the housing (200) and the ring gear (101), and is used to couple or disconnect the connection between the housing (200) and the ring gear (101).

5. The transmission device according to claim 4, characterized in that: The first end of the clutch device is fixedly connected to the housing (200), and the second end of the clutch device is suitable for coupling with or disconnecting from the gear ring (101).

6. The transmission device according to claim 2, characterized in that: The clutch device is arranged between the planet carrier (103) and the wheel end of the vehicle, and is used to couple or disconnect the connection between the planet carrier (103) and the wheel end of the vehicle.

7. The transmission device according to claim 6, characterized in that One end of the clutch device is fixedly connected to the planet carrier (103), and the other end of the clutch device is suitable for coupling with or disconnecting from the wheel end of the vehicle.

8. The transmission device according to claim 6, characterized in that One end of the clutch device is fixedly connected to the wheel end of the vehicle, and the other end of the clutch device is suitable for coupling with or disconnecting from the planet carrier (103).

9. The transmission device according to claim 6, characterized in that The gear ring (101) is arranged on the housing (200), and the gear ring (101) and the housing (200) are an integrated structure.

10. The transmission device according to claim 2, characterized in that The clutch device is provided between the sun gear (102) and the second output end of the power device, and is used to couple or disconnect the connection between the sun gear (102) and the second output end of the power device.

11. The transmission device according to claim 10, characterized in that: One end of the clutch device is fixedly connected to the sun gear (102), and the other end of the clutch device is suitable for coupling with or disconnecting from the second output end of the power device.

12. The transmission device according to claim 10, characterized in that One end of the clutch device is fixedly connected to the second output end of the power device, and the other end is suitable for coupling with or disconnecting from the sun gear (102).

13. The transmission device according to claim 10, characterized in that The gear ring (101) is arranged on the housing (200), and the gear ring (101) and the housing (200) are an integrated structure.

14. The transmission device according to any one of claims 2 to 13, characterized in that: The planetary gear comprises: A first gear (104) and a second gear (105) are coaxially arranged; The first gear (104) is meshed with the sun gear (102), and the second gear (105) is meshed with the ring gear (101).

15. The transmission device according to claim 14, characterized in that The diameter of the first gear (104) is greater than the diameter of the second gear (105).

16. The transmission device according to any one of claims 2 to 13, characterized in that: The clutch device includes a one-way clutch device (300); When the one-way clutch device (300) is in a coupled state, the connection between the power device and the wheel end of the vehicle is in a coupled state; When the one-way clutch device (300) is in the disconnected state, the connection between the wheel end of the vehicle and the power device is in a disconnected state.

17. The transmission device according to any one of claims 2 to 13, characterized in that: The clutch device includes a bidirectional clutch device; When the two-way clutch device is in a coupled state and the vehicle is in a first mode, the power of the power device is transmitted to the wheel end of the vehicle via the planetary gear assembly (100); When the two-way clutch device is in a coupled state, the vehicle is in a second mode, and the power of the wheel end of the vehicle is transmitted to the power device via the planetary gear assembly (100), and the power device converts mechanical energy into electrical energy and stores it in an energy storage device; When the two-way clutch device is in the disconnected state, the connection between the wheel end of the vehicle and the power device is in the disconnected state.

18. A powertrain, characterized in that: include: The transmission device according to any one of claims 1 to 17.

19. The powertrain according to claim 18, characterized in that: include: A first transmission device (3), comprising the transmission device according to any one of claims 1 to 17; A second transmission device (4), comprising a transmission device according to any one of claims 1 to 17; The first transmission device (3) and the second transmission device (4) are coaxially arranged.

20. A four-wheel drive assembly, characterized in that: include: The powertrain according to any one of claims 18 to 19, wherein the powertrain is arranged on the front axle and / or rear axle of the vehicle.

21. A vehicle, characterized in that: include: The powertrain according to any one of claims 18 to 19; Or the four-wheel drive assembly according to claim 20.

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