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

Abstract

A transmission device, a powertrain (2000), a four-wheel drive assembly (3000) and a vehicle (1000). The transmission device comprises a power device, a planetary gear assembly (100) and a clutch device. The planetary gear assembly (100) comprises a first input end and a first output end, the first input end being adapted to connect to a second output end of the power device, and the first output end being adapted to connect to a wheel end of a vehicle (1000). 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); the clutch device comprises a coupled state and a disconnected state; when the clutch device is in the coupled state, the connection between the power device and the wheel end of the vehicle (1000) is in a coupled state; and when the clutch device is in the disconnected state, the connection between the wheel end of the vehicle (1000) and the power device is in a disconnected state.

Description

Transmission system, powertrain, four-wheel drive system and vehicle

[0001] This application claims priority to Chinese patent application No. 202423021837.2, filed on December 6, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of vehicle technology, and more particularly to a transmission device, powertrain, four-wheel drive system, and vehicle. Background Technology

[0003] With the development of the new energy vehicle industry, electric vehicles have become a trend. Electric vehicles are vehicles powered by onboard electricity and driven by electric motors. Summary of the Invention

[0004] This disclosure provides a transmission device, a powertrain, a four-wheel drive system, and a vehicle.

[0005] In a first aspect, a transmission device is provided. The transmission device includes a power unit, a planetary gear assembly, and a clutch device. The planetary gear assembly includes a first input end and a first output end. The first input end is adapted to connect to a second output end of the power unit, and the first output end is adapted to connect to a wheel end of a vehicle. The clutch device is disposed between the second output end of the power unit and the first output end of the planetary gear assembly, and the clutch device includes a coupled state and a disengaged state.

[0006] When the clutch is engaged, the connection between the power unit and the vehicle's wheels is engaged; when the clutch is disengaged, the connection between the vehicle's wheels and the power unit is disengaged.

[0007] When the clutch is engaged, the power unit and the vehicle wheels are effectively connected via planetary gear assemblies. Power is transmitted from the second output of the power unit to the first input of the planetary gear assembly, and after transmission within the planetary gear assembly, power is output from the first output to the vehicle wheels. In this process, the power transmission path is clear and efficient.

[0008] When the clutch is disengaged, the connection between the vehicle's wheels and the power unit is severed. When the vehicle is in conditions where power transmission to the wheels is not required (such as coasting or prolonged downhill driving due to inertia), the planetary gear assembly ceases operation and is not in a passive state. This avoids unnecessary energy losses caused by friction and agitation of lubricating oil during passive operation of the planetary gear assembly under conditions such as coasting or prolonged downhill driving, thereby improving the overall transmission efficiency and energy utilization efficiency of the transmission system.

[0009] In some embodiments, the planetary gear assembly includes a housing, a ring gear, a sun gear, and a planet carrier with planetary gears, wherein the planetary gears are driven between the sun gear and the ring gear, and the planet carrier is driven between the planetary gears. A first of the sun gear, planet carrier, and ring gear is adapted to be connected to a second output end of a power unit; a second of the sun gear, planet carrier, and ring gear is adapted to be connected to a wheel end of a vehicle; and a third of the sun gear, planet carrier, and ring gear is adapted to be connected to the housing.

[0010] In some embodiments, the sun gear is connected to the second output end of the power unit, the planet carrier is connected to the wheel end of the vehicle, and the gear ring is connected to the housing.

[0011] In some embodiments, a clutch device is disposed between the housing and the gear ring, and the clutch device is configured to couple or disconnect the connection between the housing and the gear ring.

[0012] In some embodiments, the first end of the clutch device is connected to the housing, and the second end of the clutch device is adapted to couple or disconnect with the gear ring.

[0013] In some embodiments, a clutch is disposed between the planetary carrier and the wheel end of the vehicle, and the clutch is configured to couple or disconnect the connection between the planetary carrier and the wheel end of the vehicle.

[0014] In some embodiments, a first end of the clutch device is connected to a planetary carrier, and a second end of the clutch device is adapted to couple or disconnect from the wheel end of the vehicle.

[0015] In some embodiments, a first end of the clutch device is connected to the wheel end of the vehicle, and a second end of the clutch device is adapted to couple or disconnect with the planetary carrier.

[0016] In some embodiments, the gear ring is disposed on the housing, and the gear ring and the housing are an integral structure.

[0017] In some embodiments, a clutch device is disposed between the sun gear and the second output terminal of the power unit, and the clutch device is configured to couple or disconnect the connection between the sun gear and the second output terminal of the power unit.

[0018] In some embodiments, the first end of the clutch device is connected to the sun gear, and the second end of the clutch device is adapted to couple or disconnect with the second output end of the power unit.

[0019] In some embodiments, the first end of the clutch device is connected to the second output end of the power unit, and the second end of the clutch device is adapted to couple or disconnect with the sun gear.

[0020] In some embodiments, the gear ring is disposed on the housing, and the gear ring and the housing are an integral structure.

[0021] In some embodiments, the planetary gear includes a first gear and a second gear arranged coaxially, the first gear meshing with a sun gear and the second gear meshing with a ring gear.

[0022] In some embodiments, the diameter of the first gear is larger than the diameter of the second gear.

[0023] In some embodiments, the clutch device includes a one-way clutch device, wherein when the one-way clutch device is in a coupled state, the connection between the power unit and the wheel end of the vehicle is in a coupled state; and when the one-way clutch device is in a disengaged state, the connection between the wheel end of the vehicle and the power unit is in a disengaged state.

[0024] In some embodiments, the clutch device includes a two-way 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 unit is transmitted to the wheel ends of the vehicle via a planetary gear assembly. When the two-way clutch device is in a coupled state and the vehicle is in a second mode, the power of the wheel ends of the vehicle is transmitted to the power unit via the planetary gear assembly, and the power unit converts mechanical energy into electrical energy and stores it in an energy storage device. When the two-way clutch device is in a disengaged state, the connection between the wheel ends of the vehicle and the power unit is disconnected.

[0025] Secondly, a powertrain is provided. The powertrain includes at least one transmission device, which is the aforementioned transmission device.

[0026] In some embodiments, at least one transmission device includes a first transmission device and a second transmission device; the first transmission device and the second transmission device are coaxially arranged.

[0027] Thirdly, a four-wheel drive system is provided. The four-wheel drive system includes the aforementioned powertrain, which is located on at least one of the front and rear axles of the vehicle.

[0028] Fourthly, a vehicle is provided. The vehicle includes the aforementioned powertrain or the aforementioned four-wheel drive system.

[0029] It should be noted that the technical effects of the implementation methods of the second to fourth aspects can be found in the technical effects of the corresponding implementation methods in the first aspect, and will not be repeated here. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. However, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 is a block diagram of a vehicle provided according to some embodiments of the present disclosure;

[0032] Figure 2 is another block diagram of a vehicle provided according to some embodiments of the present disclosure;

[0033] Figure 3 is a schematic diagram of a vehicle transmission according to some embodiments of the present disclosure;

[0034] Figure 4 is another schematic diagram of a vehicle transmission provided according to some embodiments of the present disclosure;

[0035] Figure 5 is another schematic diagram of a vehicle transmission provided according to some embodiments of the present disclosure;

[0036] Figure 6 is another schematic diagram of a vehicle transmission provided according to some embodiments of the present disclosure;

[0037] Figure 7 is another schematic diagram of a vehicle transmission provided according to some embodiments of the present disclosure;

[0038] Figure 8 is another schematic diagram of a vehicle transmission provided according to some embodiments of the present disclosure.

[0039] Reference numerals: 1000-Vehicle; 2000-Powertrain; 3000-Four-wheel drive assembly; 1-First power unit; 2-Second power unit; 3-First transmission; 4-Second transmission; 100-Planetary gear assembly; 101-Ring gear; 102-Sun gear; 103-Planet carrier; 104-First gear; 105-Second gear; 200-Housing housing; 300-One-way clutch; 400-Two-way clutch. Detailed Implementation

[0040] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. However, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0041] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0044] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0045] In this disclosure, the terms "exemplarily" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplarily" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts by way of example.

[0046] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0047] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0048] In some embodiments, as shown in FIG1, this disclosure provides a vehicle 1000, which includes a powertrain 2000. Among the various systems of a vehicle, the powertrain is the core component of the vehicle. The powertrain generates power and transmits that power to the wheel ends, i.e., the wheels of the vehicle. After the wheels receive power, the vehicle can move normally.

[0049] Some embodiments of this disclosure are illustrated using pure electric vehicles as examples. In some embodiments of this disclosure, the vehicles may also be hybrid vehicles. This disclosure does not limit the scope of the invention.

[0050] For example, in pure electric vehicles, the electric motor is one of the sources of power. The power generated by the electric motor can be transmitted to the wheels of the vehicle, enabling the vehicle to move on the road.

[0051] In some embodiments of this disclosure, the powertrain includes a transmission device responsible for transmitting power generated by the motor to the wheel ends of the vehicle, enabling the wheel ends of the vehicle to rotate.

[0052] In some embodiments, as shown in FIG3, the powertrain 2000 in some embodiments of this disclosure includes a first transmission device 3 and a second transmission device 4.

[0053] For example, the first transmission device 3 and the second transmission device 4 have the same structure.

[0054] In some embodiments, the first transmission device 3 and the second transmission device 4 are coaxially arranged.

[0055] "Coaxial configuration" means that the central axes of the first transmission device 3 and the second transmission device 4 are coincident. When the two transmission devices are coaxially configured, the power transmission between the first transmission device 3 and the second transmission device 4 can be smoother.

[0056] For example, the first transmission device 3 and the second transmission device 4 are gearboxes with the same structure. The transmission between 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. During the meshing process, since the force direction between the tooth surfaces is relatively stable, it is not easy for vibration or jumping to occur due to uneven force.

[0057] In some embodiments, as shown in FIG2, the vehicle 1000 of some embodiments of the present disclosure includes a four-wheel drive assembly 3000. Taking a vehicle with four wheels as an example, the four-wheel drive assembly 3000 is used to distribute the power generated by the vehicle to the four wheels of the vehicle.

[0058] Under different road conditions and driving states, the four-wheel drive system can dynamically adjust the power share received by each wheel according to the vehicle's needs.

[0059] For example, when a vehicle is off-roading, the four-wheel drive system can distribute power evenly to all four wheels, enhancing the vehicle's passability; when the vehicle is turning, it can distribute more power to the outer wheels, improving the vehicle's handling.

[0060] In some embodiments, as shown in FIG2, the four-wheel drive assembly 3000 in some embodiments of this disclosure includes the powertrain 2000 described above, and the powertrain is disposed on at least one of the front axle and the rear axle of the vehicle. It is understood that the powertrain may be disposed 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 this disclosure does not limit it.

[0061] For example, the powertrain is located on the front axle of the vehicle.

[0062] For example, the powertrain is located on the rear axle of the vehicle.

[0063] In some embodiments, referring to Figures 3 to 8, the X direction in the figures is the length direction of the vehicle. In some embodiments of this disclosure, the wheel end of the vehicle includes a first wheel train and a second wheel train arranged side by side and spaced apart along the width direction of the vehicle.

[0064] It should be noted that in some embodiments of this disclosure, the first wheel system and the second wheel system may also be a first wheel system and a second wheel system arranged side by side and spaced apart along the length of the vehicle. This disclosure does not limit this.

[0065] In some embodiments of this disclosure, the powertrain further includes a power unit and a transmission device, wherein the power generated by the power unit can be transmitted to the wheel ends of the vehicle via the transmission device.

[0066] Taking the first and second gear trains as examples, the powertrain in some embodiments of this disclosure further includes a first power unit 1 and a first transmission device 3, and the powertrain in some embodiments of this disclosure further includes a second power unit 2 and a second transmission device 4.

[0067] For example, the first power unit 1 and the second power unit 2 are motors, respectively.

[0068] For example, the first transmission device 3 and the second transmission device 4 have the same structure. The transmission device mentioned below can be either the first transmission device 3 or the second transmission device 4.

[0069] For example, in some embodiments of this disclosure, the transmission device is a speed reducer.

[0070] For example, in some embodiments of this disclosure, the transmission device is a gearbox.

[0071] In some embodiments, referring to FIG3, the transmission device in some embodiments of this disclosure includes a planetary gear assembly 100, the planetary gear assembly 100 including a first input end and a first output end, the first input end being adapted to connect to a second output end of a power unit, and the first output end being adapted to connect to the wheel end of a vehicle.

[0072] That is, the power unit transmits power to the wheel ends of the vehicle through the planetary gear assembly 100.

[0073] In some embodiments of this disclosure, the transmission device employs a planetary gear assembly 100 for power transmission. Compared to other transmission methods, this allows for a wider range of transmission ratios within a more compact volume. When vehicle size is limited, using the planetary gear assembly 100 effectively integrates multiple gear settings with different transmission ratios, saving valuable interior space and resulting in a more rational overall vehicle layout. Furthermore, the contact stress distribution between the gears in the planetary gear assembly 100 is relatively reasonable, ensuring smooth power transmission from the input shaft to the output shaft.

[0074] In planetary gear transmission systems of related technologies, when the wheels and the power unit are driven by planetary gears, there are some situations that lead to a reduction in transmission efficiency.

[0075] For example, when the vehicle is coasting, the planetary gear assembly 100 is in a passive operating state. Due to the meshing, relative motion, and connection with other components between the planetary gears, energy losses such as friction and agitation of lubricating oil will occur between the planetary gears even when power transmission is not required. This unnecessary energy loss will lead to a decrease in transmission efficiency.

[0076] To address the aforementioned issues, in some embodiments, the transmission device in some embodiments of this disclosure includes a clutch device, which is located between the second output end of the power device and the first output end of the planetary gear assembly 100. The clutch device includes a coupled state and a disengaged state.

[0077] When the clutch is engaged, the connection between the power unit and the vehicle's wheels is engaged; when the clutch is disengaged, the connection between the vehicle's wheels and the power unit is disengaged.

[0078] 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 gear train.

[0079] The first input end of the planetary gear assembly 100 in the second transmission device 4 is connected to 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 gear train.

[0080] When the clutch is engaged, the power output of the power unit can be transmitted to the wheel ends of the vehicle via the planetary gear assembly 100; when the clutch is disengaged, the power output of the power unit can be disconnected from the wheel ends of the vehicle via the planetary gear assembly 100.

[0081] When the vehicle starts, by switching the clutch to the coupled state, the power unit can smoothly transmit power to the wheels of the vehicle through the planetary gear assembly 100, driving the vehicle forward. In scenarios where the vehicle is coasting or where power transmission needs to be cut off, such as when the vehicle is going downhill and relying on inertia, the clutch is disengaged, and the power unit no longer outputs power to the wheels of the vehicle, thereby reducing unnecessary power interference and improving the energy utilization rate of the vehicle.

[0082] In a transmission system, when a component is forced to rotate even when no power transmission is required, drag energy loss will occur.

[0083] For example, taking the transmission device in some embodiments of this disclosure as being located in the rear drive as an example, when the power generated by the front drive of the vehicle can meet the power demand of the vehicle, some embodiments of this disclosure cut off the power transmission of the rear drive transmission device through the clutch device, and there is no longer a connection between the wheel end of the vehicle and the motor of the rear drive. The rotation of the wheel end of the vehicle will not drag the motor in the opposite direction, thereby avoiding the loss of drag energy generated by the corresponding wheel end of the rear drive to the motor of the rear drive and reducing the energy consumption of the vehicle.

[0084] In some embodiments, as shown in FIG3, the planetary gear assembly 100 includes a housing 200, a ring gear 101, a sun gear 102, and a planet carrier 103 having planetary gears. The planetary gears are driven between the sun gear 102 and the ring gear 101, and the planet carrier 103 is driven between the planetary gears.

[0085] The 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 other two.

[0086] That is, the first of the sun gear 102, planet carrier 103 and ring gear 101 is adapted to be connected to the second output end of the power unit, the second of the sun gear 102, planet carrier 103 and ring gear 101 is adapted to be connected to the wheel end of the vehicle, and the third of the sun gear 102, planet carrier 103 and ring gear 101 is adapted to be connected to the housing 200.

[0087] It is understandable that the sun gear 102 can be either the output end or the input end of power.

[0088] Correspondingly, the planetary carrier 103 can be either the power output end or the power input end.

[0089] In addition, the gear ring 101 can be either the power output end or the power input end.

[0090] In some embodiments, the gear ring 101 is coaxially arranged with the sun gear 102.

[0091] The planetary gear assembly 100 also includes a planetary gear and a planet carrier 103. The planetary gear is located between the sun gear 102 and the ring gear 101. The planetary gear meshes with the ring gear 101 and the sun gear 102. The planetary gear is rotatably connected to the planet carrier 103, which is rotatable relative to the ring gear 101.

[0092] In some embodiments, the axis of rotation of the planet carrier 103 is coaxial with the axis of rotation of the sun gear 102.

[0093] The main function of the gear ring 101 is to mesh with the planetary gears and provide constraints and guidance for the movement of the planetary gears.

[0094] For example, power is input through the sun gear 102. When the sun gear 102 starts to rotate, the planetary gears mesh with the sun gear 102 and revolve around it under its drive. Simultaneously, because the planetary gears also mesh with the ring gear 101, they also rotate on their own axes. This combined motion of revolution and rotation allows the planetary gears to transmit power to the planet carrier 103 or the ring gear 101.

[0095] 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, thereby controlling the transmission of the entire planetary gear set.

[0096] In some embodiments, by setting the orientation of the planetary gear assembly 100, the planetary gear assembly 100 can also achieve different transmission effects.

[0097] For example, taking the above-mentioned power transmission method as an example, the sun gear 102 is connected to the second output end of the power unit, the planet carrier 103 is connected to the wheel end of the vehicle, and the gear ring 101 is connected to the housing 200.

[0098] In this configuration, the planetary gear assembly 100 functions as a speed reducer. When the sun gear 102 receives power from the power unit and begins to rotate, since the ring gear 101 is fixed, the planetary gears must both rotate on their own axes and revolve around the sun gear 102. During this process, the rotational speed of the planet carrier 103 is lower than that of the sun gear 102. In other words, after power is transmitted from the power unit to the planetary gear assembly 100 via the sun gear 102, the special motion of the planetary gears reduces the rotational speed transmitted to the planet carrier 103, thereby reducing the rotational speed transmitted to the wheel ends of the vehicle, thus achieving a speed reduction effect. Therefore, the planetary gear assembly 100 functions as a speed reducer in this configuration.

[0099] In some embodiments, a clutch device is disposed between the housing 200 and the gear ring 101, and the clutch device is used to couple or disconnect the connection between the housing 200 and the gear ring 101. The clutch device controls the rotation of the gear ring 101, which means that the motion state of the gear ring 101 can be changed (such as fixed, rotating, etc.), thereby affecting the transmission of the entire planetary gear set.

[0100] When the gear ring 101 is controlled to a fixed state by the clutch device, the motion pattern of the planetary gear revolving around the sun gear 102 and rotating on its own axis will produce a specific power transmission effect and transmission ratio.

[0101] When the gear ring 101 is converted to a rotatable state through the clutch device, the originally fixed gear ring 101 can rotate freely. When the planetary gear revolves around the sun gear 102 under the drive of the sun gear 102, since the gear ring 101 no longer provides a fixed constraint, the rotation and revolution of the planetary gears become irregular. The motion path and speed of the planetary gears cannot be controlled in the original way, causing the planetary gears to be unable to transmit power stably as under normal circumstances, thus making it impossible for the entire planetary gear set to effectively transmit power.

[0102] In some embodiments, the first end of the clutch device is fixedly connected to the housing 200, and the second end of the clutch device is adapted to couple or disconnect with the gear ring 101.

[0103] Understandably, the clutch device has two ends. The first end is fixed to the housing 200, indicating that the position of the first end of the clutch device is relatively fixed. The second end of the clutch device can couple or disconnect with the gear ring 101. In this way, the clutch device is equivalent to a device with a switching function. One end is fixed to a stable housing 200, and the other end can contact and connect with the gear ring 101 to allow the gear ring 101 to receive power-related input, or it can disconnect to prevent the gear ring 101 from being affected by this power-related factor.

[0104] In some embodiments, a clutch device is disposed 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.

[0105] On the one hand, the clutch device can couple the planetary carrier 103 with the wheel ends of the vehicle, allowing power to be smoothly transmitted to the wheels through the planetary carrier 103, thus achieving normal vehicle drive. On the other hand, the clutch device can disconnect the planetary carrier 103 from the wheel ends of the vehicle.

[0106] For example, the first end of the clutch device is fixedly connected to the planetary carrier 103, and the second end of the clutch device is adapted to couple or disconnect with the wheel end of the vehicle.

[0107] In this structure, the planetary carrier 103 is a relatively fixed connection point of the clutch device. The clutch device is like a controllable connecting component extending from the planetary carrier 103. The main function of the clutch device is to control whether the power of the planetary carrier 103 is transmitted to the vehicle wheels.

[0108] For example, the first end of the clutch device is fixedly connected to the wheel end of the vehicle, and the second end of the clutch device is adapted to couple or disconnect with the planetary carrier 103.

[0109] In this case, the vehicle wheel end is the fixed starting point of the clutch device. The clutch device is mainly used to control whether the power of the planetary carrier 103 is connected to the vehicle wheel end. The focus is on the control of the power connection of the planetary carrier 103.

[0110] In some embodiments, the gear ring 101 is disposed on the housing 200, and the gear ring 101 and the housing 200 are an integral structure.

[0111] During the operation of the planetary gear assembly 100, the gear ring 101 bears the force from the planetary gears. Since the gear ring 101 and the housing 200 are integral, this structure can better withstand these forces.

[0112] In some embodiments, a clutch device is disposed between the sun gear 102 and the second output terminal of the power unit, and the clutch device is used to couple or disconnect the connection between the sun gear 102 and the second output terminal of the power unit.

[0113] For example, when the clutch device is used to control the transmission of the sun gear 102, it can switch the connection state between the sun gear 102 and the power unit. In the coupled state, the power output by the power unit can be smoothly transmitted to the sun gear 102, causing the sun gear 102 to start rotating.

[0114] For example, the first end of the clutch device is fixedly connected to the sun gear 102, and the second end of the clutch device is adapted to couple or disconnect with the second output end of the power unit.

[0115] In this connection method, when the clutch is disengaged, the sun gear 102 is relatively independent of the second output end of the power unit. Even if the second output end of the power unit is operating, the sun gear 102 will not be directly affected by the power of the power unit. This allows the planetary gear assembly 100 to maintain an independent state when the sun gear 102 is stationary.

[0116] The vehicle can stop the sun gear 102 from rotating by disengaging the clutch, so that other components in the planetary gear assembly 100 (such as the planet carrier 103 and the ring gear 101) are not affected by the power of the sun gear 102, thereby achieving a specific power transmission mode or vehicle driving state.

[0117] When the clutch engages, power from the second output of the power unit is transmitted to the sun gear 102, and the planetary gear assembly 100 begins to operate. In this situation, the operation of the planetary gear assembly 100 is controlled by the clutch engaging power from the sun gear 102 side. For the entire planetary gear assembly 100, power engagement begins from the sun gear 102. The initial power transmission is primarily focused on the sun gear 102 side; power only flows from the second output of the power unit to the sun gear 102, thereby driving the entire planetary gear assembly 100, when the clutch engages.

[0118] For example, the first end of the clutch device is fixedly connected to the second output end of the power device, and the second end of the clutch device is adapted to couple or disconnect with the sun gear 102.

[0119] When the clutch disengages, the sun gear 102 is disconnected from the second output terminal of the power unit, and power cannot be transmitted to the sun gear 102. However, unlike the former, the power at the second output terminal of the power unit still exists, 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 to be connected, and the entire planetary gear assembly 100 is stationary because power is not transmitted from the second output terminal of the power unit. In other words, power first originates from the second output terminal of the power unit, and the clutch control determines whether to connect with the sun gear 102, thereby initiating the power transmission of the planetary gear assembly 100.

[0120] Similarly, in this case, the gear ring 101 is disposed on the housing 200, and the gear ring 101 and the housing 200 are an integral structure.

[0121] In some embodiments, referring to FIG3, the clutch device is a one-way clutch device 300. When the one-way clutch device 300 is in the coupled state, the connection between the power unit and the wheel ends of the vehicle is in the coupled state. When the one-way clutch device 300 is in the disengaged state, the connection between the wheel ends of the vehicle and the power unit is in the disengaged state.

[0122] That is, when the clutch is in a coupled state, the power at the second output end of the power unit is transmitted to the first input end of the planetary gear assembly, and the power that the clutch allows the first input end of the planetary gear assembly to rotate in the first direction is transmitted to the first output end of the planetary gear assembly 100.

[0123] For power entering from the first input end of the planetary gear assembly, the internal rotational power of the planetary gear assembly in a first direction is transmitted to the first output end of the planetary gear assembly 100. Here, the first direction is a specific direction determined based on the structure and transmission design of the planetary gear assembly itself.

[0124] Furthermore, when the first output end of the planetary gear assembly 100 rotates in the second direction, the clutch device can prevent the power of the first output end of the planetary gear assembly 100 rotating in the opposite direction of the second direction from being transmitted to the first input end of the planetary gear assembly.

[0125] Furthermore, during this process, the first output end of the planetary gear assembly 100 rotates in the second direction. This second direction is also a specific direction different from the first direction, defined by the overall transmission architecture of the planetary gear assembly.

[0126] The one-way clutch device 300 is a special clutch mechanism. Unlike ordinary clutch devices, the one-way clutch device 300 has directional power transmission characteristics.

[0127] The one-way clutch 300 prevents the power of the first output end of the planetary gear assembly 100 rotating in the opposite direction of the second direction from being transmitted to the first input end of the planetary gear assembly. In other words, when the first output end experiences power attempting to rotate in the opposite direction of the second direction (that is, the direction opposite to the second direction of rotation of the set normal output end), the one-way clutch 300 will act as a one-way block, preventing this reverse power from being transmitted back to the first input end.

[0128] In some embodiments, referring to FIG4, the clutch device is a two-way clutch device 400. When the two-way clutch device is in a coupled state, if the vehicle is in a first mode, the power unit is in a drive mode, and the power of the power unit is transmitted to the wheel ends of the vehicle via the planetary gear assembly 100.

[0129] When the two-way clutch is in the coupled state, if the vehicle is in the second mode, the power at the wheel ends of the vehicle is transmitted to the power unit through the planetary gear assembly 100. The power unit is in the power generation mode, and the power unit converts mechanical energy into electrical energy and stores it in the energy storage device.

[0130] When the two-way clutch is in the disengaged state, the connection between the vehicle's wheel ends and the power unit is disconnected.

[0131] When the clutch is in a coupled state, the power at the second output end of the power unit can be transmitted to the first input end of the planetary gear assembly. The clutch allows the power of the first input end of the planetary gear assembly rotating in the first direction to be transmitted to the first output end of the planetary gear assembly 100. When the clutch is in a coupled state, if the first output end of the planetary gear assembly 100 rotates in the second direction, the clutch allows the power of the first output end of the planetary gear assembly 100 rotating in the opposite direction of the second direction to be transmitted to the first input end of the planetary gear assembly 100, and causes the first input end of the planetary gear assembly 100 to rotate in the opposite direction of the first direction.

[0132] For the power entering from the first input end of the planetary gear assembly, the power inside the planetary gear assembly that allows rotation in a first direction is transmitted to the first output end of the planetary gear assembly 100.

[0133] When the power transmission causes the first output end of the planetary gear assembly 100 to rotate in the second direction, the two-way clutch also allows the power of the first output end of the planetary gear assembly 100 rotating in the opposite direction of the second direction to be transmitted to the first input end of the planetary gear assembly 100. This means that when the first output end of the planetary gear assembly 100 experiences power rotation in the opposite direction of the second direction, this reverse power will not be blocked, but can be transmitted back to the first input end of the planetary gear assembly 100 through the two-way clutch.

[0134] Furthermore, when this reverse power is transmitted to the first input end of the planetary gear assembly 100, it can cause the first input end of the planetary gear assembly 100 to rotate in the opposite direction of the first direction. The bidirectional clutch not only allows power to be transmitted in reverse between the first output end and the first input end, but also enables the first input end to make a corresponding rotational action according to the received reverse power.

[0135] When the vehicle begins to decelerate, the two-way clutch can promptly maintain a proper connection between the planetary gear assembly and the motor, allowing the vehicle's kinetic energy to be effectively transferred to the motor through the planetary gear assembly.

[0136] For example, during the deceleration and braking process of an electric vehicle, the two-way clutch ensures that the rotational kinetic energy of the wheels can be transferred to the motor through the planetary gear assembly. After receiving the kinetic energy, the motor switches to the power generation mode, converts the kinetic energy into electrical energy and stores it, realizing energy feedback of the motor, thereby improving the energy utilization efficiency of the vehicle and extending the vehicle's driving range.

[0137] In some embodiments, as shown in FIG3, the planetary gear includes a first gear 104 and a second gear 105 coaxially arranged, the first gear 104 meshing with the sun gear 102, and the second gear 105 meshing with the ring gear 101.

[0138] The first gear 104 and the second gear 105 are arranged in the same direction as the extension direction of the shaft of the sun gear 102. The first gear 104 is located on the periphery of the sun gear 102 and meshes with the sun gear 102. The second gear 105 is located inside the gear ring 101 and meshes with the gear ring 101.

[0139] The first gear 104 is located around the sun gear 102 and meshes with it. For example, the sun gear 102 is the core power input component of the planetary gear assembly 100. When power is transmitted to the sun gear 102, it can transmit the power through meshing with the first gear 104. The first gear 104 revolves around the sun gear 102 while also rotating on its own axis. The second gear 105 is located inside the gear ring 101 and meshes with it.

[0140] The ring gear 101 also plays an important role in the planetary gear assembly 100, as it, together with the sun gear 102, constrains the movement of the planetary gears. The meshing of the second gear 105 with the ring gear 101 provides another path for power transmission in the planetary gear assembly 100, and also affects the transmission ratio and power output characteristics of the entire assembly to a certain extent.

[0141] In some embodiments, the diameter of the first gear 104 is larger than the diameter of the second gear 105.

[0142] 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 equals force multiplied by the lever arm, the first gear 104 can produce a relatively larger 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 smaller. This difference allows the planetary gear assembly 100 to distribute torque according to different needs during power transmission.

[0143] The design of having a larger diameter for the first gear 104 than for the second gear 105 allows for a more compact spatial layout while maintaining the performance of the planetary gear assembly 100. The larger diameter first gear 104 can be better distributed around the sun gear 102, making full use of the space surrounding the sun gear 102 for power transmission; the smaller diameter second gear 105 can be rationally placed inside the gear ring 101, avoiding the problem of an excessively large assembly size due to the planetary gears.

[0144] In some embodiments, the motor includes a power output shaft adapted to output power.

[0145] The following describes some embodiments of this disclosure:

[0146] In some embodiments, referring to Figures 3 and 4, Figure 3 shows a case where the clutch device in some embodiments of this disclosure is a one-way clutch device 300, and Figure 4 shows a case where the clutch device in some embodiments of this disclosure is a two-way clutch device.

[0147] The transmission device in some embodiments of this disclosure further includes a housing 200, a planetary gear assembly 100 disposed within the housing 200, and a clutch device disposed between the housing 200 and the gear ring 101.

[0148] For example, housing 200 is the housing of a speed reducer.

[0149] When the clutch is engaged, it can fix the gear ring 101 to the housing 200. In this way, the gear ring 101 can remain stationary during the operation of the planetary gear assembly 100.

[0150] In this configuration, power is input to the sun gear 102, and the planetary gears, driven by the sun gear 102, both revolve around the sun gear 102 and rotate on their own axes because the ring gear 101 is fixed. This combined motion of the planetary gears outputs power through the planet carrier 103, and a fixed transmission ratio is determined based on the gear ratio between the sun gear 102, the planetary gears, and the ring gear 101.

[0151] When the clutch is switched to the disengaged state, the ring gear 101 is no longer fixed to the housing 200 and can rotate freely. In this case, the motion state of the planetary gears changes. 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.

[0152] For example, when the clutch is in a coupled state, when the power output axis 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.

[0153] In some embodiments, referring to Figures 5 and 6, Figure 5 shows a case where the clutch device in some embodiments of this disclosure is a one-way clutch device 300, and Figure 6 shows a case where the clutch device in some embodiments of this disclosure is a two-way clutch device.

[0154] The transmission device in some embodiments of this disclosure further includes a housing 200, a planetary gear assembly 100 disposed within the housing 200, and a gear ring 101 fixed to the housing 200.

[0155] The planetary carrier 103 includes a first part and a second part. The planetary gear is rotatably connected to the first part. A clutch device is disposed between the first part and the second part. The second part forms the first output end of the planetary gear assembly 100.

[0156] It is understood that in this embodiment of the disclosure, the clutch device controls the transmission of the planetary carrier 103.

[0157] It is understandable that when the clutch is in a coupled state, the first and second parts of the planetary carrier 103 are connected together, and the power transmitted by the planetary gear through the first part can be smoothly output through the second part, thus realizing a complete power transmission link.

[0158] When the clutch is disengaged, the connection between the first and second parts of the planetary carrier 103 is severed. In this situation, the power transmitted from the planetary gears to the first part cannot be output through the second part, thus interrupting the power transmission.

[0159] For example, when the clutch is in a coupled state, when the power output axis 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.

[0160] In some embodiments, referring to Figures 7 and 8, Figure 7 shows a case where the clutch device in some embodiments of this disclosure is a one-way clutch device 300, and Figure 8 shows a case where the clutch device in some embodiments of this disclosure is a two-way clutch device.

[0161] In some embodiments of this disclosure, the sun gear 102 forms one of the first input end and the first output end of the planetary gear assembly 100, and the planet carrier 103 forms the other of the first input end and the first output end of the planetary gear assembly 100.

[0162] The transmission device in some embodiments of this disclosure also includes a housing 200, and a planetary gear assembly 100 is disposed within the housing 200. For example, a gear ring 101 is fixedly connected to the housing 200.

[0163] The clutch is located between the sun gear 102 and the power output shaft. Understandably, in this case, the clutch actually controls the transmission of the sun gear 102.

[0164] As shown in Figures 7 and 8, when the clutch is in a coupled state, the power output axis transmits power to the planetary gear assembly 100. The power is transmitted to the sun gear 102, which then transmits the power to the first gear 104. The first gear 104 transmits the power to the second gear 105, which then transmits the power to the planet carrier 103. The planet carrier 103 then transmits the power to the power output end of the entire transmission device through the clutch.

[0165] When the clutch is disengaged, the sun gear 102 transmits power to the first gear 104, and the connection between the power output shaft and the sun gear 102 is cut off, thereby interrupting the transmission of power.

[0166] In some embodiments, the one-way clutch device 300 includes an inner one-way clutch ring and an outer one-way clutch ring. Taking the one-way clutch device 300 in FIG3, which is disposed between the gear ring 101 and the housing 200, as an example, when the inner one-way clutch ring is rotatable relative to the outer one-way clutch ring, the gear ring 101 is in an unlocked state. In this case, the gear ring 101 can rotate relative to the housing 200, the entire planetary gear assembly 100 does not have a fixed transmission ratio, and the first gear 104 and the second gear 105 cannot transmit power from the sun gear 102.

[0167] When the inner ring of the one-way clutch is locked relative to the outer ring of the one-way clutch, the gear ring 101 is in a locked state. In this case, the gear ring 101 is locked relative to the housing 200, and 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.

[0168] As shown in Figure 3, when the clutch is in a coupled state, the planetary carrier 103 and the housing 200 are connected through the clutch, and the power transmission inside the planetary gear assembly 100 can proceed smoothly. For example, when the sun gear 102 is used as the first input terminal to input power, the power is transmitted to the planetary carrier 103 through the motion of the planetary gears. Since the clutch is in a coupled state, the planetary carrier 103 can continue to transmit power, thereby realizing a complete power transmission link from the sun gear 102 to the planetary carrier 103 (or from the planetary carrier 103 to the sun gear 102).

[0169] When the vehicle is coasting or when power transmission is not required, the clutch is disengaged, and the gear ring 101 and sun gear 102 cannot transmit power, thus avoiding unnecessary power loss and enabling the vehicle to coast more effectively using inertia.

[0170] For example, when the clutch is in a coupled state, when the power output axis 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 (such as the first output end of the planetary gear assembly 100) through the clutch.

[0171] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A transmission device, comprising: Power unit; A planetary gear assembly (100) includes a first input end and a first output end, the first input end being adapted to connect to a second output end of the power unit, and the first output end being adapted to connect to the wheel end of a vehicle (1000). as well as A clutch device is provided between the second output end of the power unit and the first output end of the planetary gear assembly (100), and the clutch device includes a coupled state and a disengaged state; When the clutch device is in the coupled state, the connection between the power unit and the wheel end of the vehicle (1000) is in the coupled state; When the clutch is in the disengaged state, the connection between the wheel end of the vehicle (1000) and the power unit is disconnected.

2. The transmission device according to claim 1, wherein, The planetary gear assembly (100) includes: Casing (200); Gear ring (101); Sun wheel (102); and A planet carrier (103) with planetary gears is provided, the planetary gears being driven between the sun gear (102) and the ring gear (101), and the planet carrier (103) is driven by the planetary gears. The first of the sun gear (102), the planet carrier (103), and the ring gear (101) is adapted to be connected to the second output end of the power unit, the second of the sun gear (102), the planet carrier (103), and the ring gear (101) is adapted to be connected to the wheel end of the vehicle (1000), and the third of the sun gear (102), the planet carrier (103), and the ring gear (101) is adapted to be connected to the housing (200).

3. The transmission device according to claim 2, wherein, The sun gear (102) is connected to the second output end of the power unit, the planet carrier (103) is connected to the wheel end of the vehicle (1000), and the gear ring (101) is connected to the housing (200).

4. The transmission device according to claim 2 or 3, wherein, The clutch device is disposed between the housing (200) and the gear ring (101), and the clutch device is configured to couple or disconnect the connection between the housing (200) and the gear ring (101).

5. The transmission device according to claim 4, wherein, The first end of the clutch device is connected to the housing (200), and the second end of the clutch device is adapted to couple or disconnect with the gear ring (101).

6. The transmission device according to claim 2 or 3, wherein, The clutch device is disposed between the planetary carrier (103) and the wheel end of the vehicle (1000), and the clutch device is configured to couple or disconnect the connection between the planetary carrier (103) and the wheel end of the vehicle (1000).

7. The transmission device according to claim 6, wherein, The first end of the clutch device is connected to the planetary carrier (103), and the second end of the clutch device is adapted to couple or disconnect with the wheel end of the vehicle (1000).

8. The transmission device according to claim 6, wherein, The first end of the clutch device is connected to the wheel end of the vehicle (1000), and the second end of the clutch device is adapted to couple or disconnect from the planetary carrier (103).

9. The transmission device according to any one of claims 6 to 8, wherein, The gear ring (101) is disposed on the housing (200), and the gear ring (101) and the housing (200) are an integral structure.

10. The transmission device according to claim 2 or 3, wherein, The clutch device is located between the sun gear (102) and the second output end of the power unit, and the clutch device is configured to couple or disconnect the connection between the sun gear (102) and the second output end of the power unit.

11. The transmission device according to claim 10, wherein, The first end of the clutch device is connected to the sun gear (102), and the second end of the clutch device is adapted to be coupled or disconnected from the second output end of the power device.

12. The transmission device according to claim 10, wherein, The first end of the clutch device is connected to the second output end of the power device, and the second end of the clutch device is adapted to couple or disconnect with the sun gear (102).

13. The transmission device according to any one of claims 10 to 12, wherein, The gear ring (101) is disposed on the housing (200), and the gear ring (101) and the housing (200) are an integral structure.

14. The transmission device according to any one of claims 2 to 13, wherein, The planetary gears include: The first gear (104) and the second gear (105) are coaxially arranged; The first gear (104) meshes with the sun gear (102), and the second gear (105) meshes with the gear ring (101).

15. The transmission device according to claim 14, wherein, The diameter of the first gear (104) is larger than the diameter of the second gear (105).

16. The transmission device according to any one of claims 2 to 13, wherein, The clutch device includes a one-way clutch device (300); When the one-way clutch device (300) is in the coupled state, the connection between the power unit and the wheel end of the vehicle (1000) is in the coupled state; When the one-way clutch device (300) is in the disengaged state, the connection between the wheel end of the vehicle (1000) and the power unit is in the disengaged state.

17. The transmission device according to any one of claims 2 to 13, wherein, The clutch device includes a two-way clutch device (400); When the bidirectional clutch device (400) is in the coupled state and the vehicle (1000) is in the first mode, the power of the power unit is transmitted to the wheel ends of the vehicle (1000) via the planetary gear assembly (100); When the bidirectional clutch device (400) is in the coupled state and the vehicle (1000) is in the second mode, the power of the wheel end of the vehicle (1000) is transmitted to the power unit through the planetary gear assembly (100), and the power unit converts mechanical energy into electrical energy and stores it in the energy storage device. When the bidirectional clutch device (400) is in the disengaged state, the connection between the wheel end of the vehicle (1000) and the power unit is in the disengaged state.

18. A powertrain (2000), comprising: At least one transmission device, wherein the transmission device is the transmission device according to any one of claims 1 to 17.

19. The powertrain (2000) according to claim 18, wherein, The at least one transmission device includes: First transmission device (3); and Second transmission device (4); The first transmission device (3) and the second transmission device (4) are coaxially arranged.

20. A four-wheel drive assembly (3000), comprising: The powertrain (2000) according to claim 18 or 19 is disposed on at least one of the front axle and the rear axle of the vehicle (1000).

21. A vehicle (1000), comprising: The powertrain (2000) according to claim 18 or 19; or The four-wheel drive assembly (3000) according to claim 20.

Images