Power drive assembly and vehicle

Abstract

The application discloses a power driving assembly and a vehicle, and relates to the technical field of vehicles.The power driving assembly comprises a power device, a planetary gear assembly, the planetary gear assembly comprises a first planetary mechanism and a second planetary mechanism, the power device is in power connection with the first planetary mechanism, the second planetary mechanism has two power paths, and the first planetary mechanism is selectively in power connection with a differential through one of the two power paths.The power driving assembly of the application can not only realize power transmission of the two power paths, meet different power driving requirements, and realize compact installation of the planetary gear assembly, but also is beneficial to reducing the overall structural size of the power driving assembly, facilitating installation and arrangement of the whole vehicle and reducing installation difficulty.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more particularly to a power drive assembly and a vehicle having the power drive assembly. Background Technology

[0002] Currently, most electric vehicle powertrains on the market are driven by single-speed reducers. Due to the external characteristics of the motor, single-speed reducers can basically meet the needs of general road conditions. However, single-speed reducers cannot simultaneously meet the needs of low-speed, high-torque operation and high vehicle speed, especially for electric off-road vehicles with off-road and obstacle-crossing requirements. In related technologies, a higher-power motor or dual motors are usually used to solve this problem, simultaneously meeting the vehicle's daily operating conditions and high torque requirements. However, this not only significantly increases the overall vehicle cost, but also means moving away from the motor's efficient range in most daily operating conditions, reducing the vehicle's daily operating economy. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a power drive assembly that can realize gear switching between two different power states to meet different power requirements, and the dual planetary gear set in series helps to reduce the structural size of the power drive assembly.

[0004] According to an embodiment of the present invention, a power drive assembly includes: a power unit; a planetary gear assembly, the planetary gear assembly including a first planetary mechanism and a second planetary mechanism, the power unit being poweredly connected to the first planetary mechanism, the second planetary mechanism having two power paths, and the first planetary mechanism being selectively poweredly connected to a differential via one of the two power paths.

[0005] According to the power drive assembly of the present invention, by setting a first planetary mechanism and a second planetary mechanism to transmit power between the power unit and the differential, it can not only realize the power transmission of two power paths to meet different power drive requirements, but also realize the compact installation of the planetary gear assembly, which is conducive to reducing the overall structural size of the power drive assembly, facilitating the installation and layout in the whole vehicle, and reducing the installation difficulty.

[0006] According to some embodiments of the present invention, in a power drive assembly, the second planetary mechanism includes a second sun gear, a second ring gear, and a second planet gear, wherein the second planet gear meshes with the second sun gear and the second ring gear respectively, and the first planetary mechanism is selectively powered to one of the second sun gear and the second ring gear. The second sun gear and the second planetary gear form the first power path, and the second ring gear and the second planetary gear form the second power path.

[0007] According to some embodiments of the present invention, the second planetary mechanism further includes a second planetary carrier, the second planetary gears are mounted on the second planetary carrier, and the second planetary gears are poweredly connected to the differential through the second planetary carrier.

[0008] According to some embodiments of the present invention, in a power drive assembly, the second planetary carrier is located on the side of the second planetary gear opposite to the first planetary mechanism.

[0009] According to some embodiments of the present invention, the power drive assembly further includes a transmission mechanism for selectively powering the first planetary mechanism to one of the second sun gear and the second ring gear.

[0010] According to some embodiments of the present invention, the power drive assembly includes a transmission mechanism comprising a drive shaft and a switching element, the drive shaft being poweredly connected to the first planetary mechanism, the switching element being movably mounted on the drive shaft, and the switching element being used to selectively connect to one of the second sun gear and the second ring gear.

[0011] According to some embodiments of the power drive assembly of the present invention, the second planetary mechanism further includes a second sun gear shaft, wherein the second sun gear is mounted on the second sun gear shaft; The second sun gear shaft is constructed as a hollow shaft, and the transmission shaft is rotatably mounted on the second sun gear shaft.

[0012] According to some embodiments of the power drive assembly of the present invention, at least a portion of the second gear ring is sleeved outside the switching element; The second gear ring is connected to the first transmission part, and the second sun gear is connected to the second transmission part. The first transmission part and the second transmission part are located at both ends of the switching element and are selectively connected to the switching element.

[0013] According to some embodiments of the present invention, in a power drive assembly, the centerline of the first planetary mechanism, the axis of the drive shaft, and the centerline of the second planetary mechanism are located on the same straight line.

[0014] According to some embodiments of the present invention, the power drive assembly of the first planetary mechanism includes a first sun gear, a first ring gear, and a first planet gear, wherein the first planet gear meshes with the first sun gear and the first ring gear respectively; The first sun gear is poweredly connected to the power unit, and the first planetary gear is connected to a first planetary carrier, which is used to selectively power the second planetary mechanism.

[0015] According to some embodiments of the present invention, the power drive assembly further includes a drive housing, wherein the first planetary mechanism and the second planetary mechanism are both mounted on the drive housing, and the first gear ring is fixed relative to the drive housing.

[0016] According to some embodiments of the present invention, the power unit, the first planetary mechanism and the second planetary mechanism are arranged in a lateral arrangement facing each other along the vehicle.

[0017] The present invention also proposes a vehicle.

[0018] The vehicle according to embodiments of the present invention includes the power drive assembly described in any of the above embodiments.

[0019] The vehicle and the aforementioned powertrain have the same advantages over the prior art, which will not be repeated here.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a connection diagram of the power drive assembly of the present invention in neutral mode; Figure 2 This is a connection diagram of the power drive assembly of the present invention in low-speed first gear. Figure 3 This is a schematic diagram of the connection of the power drive assembly of the present invention in second-speed operation.

[0022] Figure label: Powertrain 100 First planetary mechanism 11, first sun gear 111, first ring gear 112, first planet gear 113, first planet carrier 114; second planetary mechanism 12, second sun gear 121, second transmission unit 1211, second sun gear shaft 1212, second ring gear 122, first transmission unit 1221, second planet gear 123, second planet carrier 124, output gear 1241. Transmission mechanism 2, drive shaft 21, switching element 22, power unit 3, Differential 200, differential gear 201. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z direction.

[0026] The following is for reference. Figures 1-3 The present invention describes a power drive assembly 100 that can achieve power output in two power states to meet two different power operating conditions, and integrates the structures of two planetary gear sets, which helps to reduce the structural size of the power drive assembly 100 and facilitates installation.

[0027] like Figures 1-3 As shown, a power drive assembly 100 according to an embodiment of the present invention includes: a power unit 3 and a planetary gear assembly.

[0028] The power unit 3 is the power output structure of the power drive assembly 100, which can provide driving force to the planetary gear set assembly, so as to output driving force to the differential 200 through the planetary gear set assembly, thereby driving the vehicle. The power unit 3 can be an engine, so that the engine can output driving force after starting, or the power unit 3 can be a drive motor, or other drive forms combining an engine and a drive motor.

[0029] The planetary gear set assembly includes a first planetary mechanism 11 and a second planetary mechanism 12. The power unit 3 is poweredly connected to the first planetary mechanism 11, and the second planetary mechanism 12 has two power paths. The first planetary mechanism 11 is selectively powered to the differential 200 via one of the two power paths. In other words, the planetary gear set assembly includes two planetary gear sets powered between the power unit 3 and the differential 200, and the first planetary mechanism 11 can selectively transmit power to one of the two power paths of the second planetary mechanism 12.

[0030] The two power paths have different power ratios, meaning the power drive assembly 100 has two power levels. One power path is suitable for low-speed (first gear), and the other for high-speed (second gear). During vehicle operation, in low-speed conditions, the first planetary mechanism 11 can switch to a power path via the second planetary mechanism 12 to transmit power to the differential 200, achieving high torque at low speeds. Conversely, in high-speed conditions, the first planetary mechanism 11 can switch to another power path via the second planetary mechanism 12 to transmit power to the differential 200, achieving low torque at high speeds. Therefore, this power drive assembly 100 allows the vehicle to operate efficiently under normal conditions and maintain power output at the wheels when high torque is needed for obstacle avoidance, meeting the power drive requirements of various operating conditions.

[0031] Furthermore, by connecting the first planetary mechanism 11 and the second planetary mechanism 12 in series between the power unit 3 and the differential 200, the first planetary mechanism 11 and the second planetary mechanism 12 can be installed in series, thereby utilizing the structural characteristics of the small axial dimension of the planetary gear set to achieve a compact axial installation of the two planetary gear sets, reducing the structural size of the power drive assembly 100 and reducing the overall space occupation.

[0032] According to the embodiment of the present invention, the power drive assembly 100 transmits power between the power unit 3 and the differential 200 by setting a first planetary mechanism 11 and a second planetary mechanism 12. This not only enables power transmission through two power paths to meet different power drive requirements, but also allows for compact installation of the planetary gear assembly, which helps to reduce the overall structural size of the power drive assembly 100, facilitates its installation and layout in the vehicle, and reduces installation difficulty.

[0033] In some embodiments, such as Figures 1-3 As shown, the second planetary mechanism 12 includes a second sun gear 121, a second ring gear 122, and a second planet gear 123. The second planet gear 123 meshes with the second sun gear 121 and the second ring gear 122, respectively. The first planetary mechanism 11 is selectively connected to one of the second sun gear 121 and the second ring gear 122. That is, when the first planetary mechanism 11 is connected to the second sun gear 121, the driving force on the power unit 3 can be transmitted from the first planetary mechanism 11 through the second sun gear 121 and the second planet gear 123 to the differential 200, realizing a power transmission path. When the first planetary mechanism 11 is connected to the second ring gear 122, the driving force on the power unit 3 can be transmitted from the first planetary mechanism 11 through the second ring gear 122 and the second planet gear 123 to the differential 200, realizing a power transmission path.

[0034] The second sun gear 121 and the second planetary gear 123 form a first power path, in which the first planetary mechanism 11 transmits power to the second sun gear 121 for first-stage reduction, the second sun gear 121 then transmits power to the second planetary gear 123 for second-stage reduction, and finally transmits power to the differential 200 for two-stage reduction. Similarly, the second ring gear 122 and the second planetary gear 123 form a second power path, in which the first planetary mechanism 11 transmits power to the second ring gear 122 for first-stage reduction, the second ring gear 122 then transmits power to the second planetary gear 123 for second-stage reduction, and finally transmits power to the differential 200 for two-stage reduction.

[0035] Therefore, when power passes through the first power path and the second power path, the transmission components on the two power paths are different, resulting in different transmission speed ratios. The first power path can be used as the power transmission path for low-speed operation in first gear, and the second power path can be used as the power transmission path for high-speed operation in second gear. Thus, during vehicle operation, by switching the power connection mode between the first planetary mechanism 11 and the second sun gear 121 and the second ring gear 122, the power transmission path can be adjusted, thereby achieving power state control for the two gears and meeting the power requirements under different power conditions.

[0036] In some embodiments, such as Figures 1-3 As shown, the second planetary mechanism 12 also includes a second planetary carrier 124, and a second planetary gear 123 is mounted on the second planetary carrier 124. The second planetary gear 123 is connected to the differential 200 through the second planetary carrier 124. That is, when the first planetary mechanism 11 transmits power to the second sun gear 121 or the second ring gear 122, the power can be output to the differential 200 through the second planetary gear 123 and the second planetary carrier 124 to realize power output.

[0037] By connecting the second planetary carrier 124 between the second planetary gear 123 and the differential 200, the installation feature of the second planetary carrier 124 extending outside the second gear ring 122 can be used to connect the power to the differential 200. This reduces the connection difficulty between the second planetary mechanism 12 and the differential 200. In other words, the second planetary carrier 124 has a structural advantage over other structural components in the second planetary mechanism 12, making it easier to connect to the differential 200. As a result, the installation difficulty between the power drive assembly 100 and the differential 200 can be reduced, saving installation time and costs.

[0038] During specific installation, an output gear 1241 can be provided at the end of the second planetary carrier 124. The output gear 1241 can mesh with the differential gear 201 on the differential 200, so that the power on the second planetary carrier 124 can be transmitted to the differential 200 through the meshing transmission between the output gear 1241 and the differential gear 201. Thus, the differential 200 and the second planetary mechanism 12 can be installed radially in the second planetary mechanism 12. In this way, the power drive assembly 100 can be axially installed between the first planetary mechanism 11 and the second planetary mechanism 12, or it can be radially installed between the differential 200 and the second planetary mechanism 12. This makes the structure of the power drive assembly 100 more compact, avoids the problem of excessive structural size in one direction, and reduces the installation difficulty of the power drive assembly 100 on the vehicle.

[0039] In some embodiments, the second planetary carrier 124 is located on the side of the second planetary gear 123 opposite to the first planetary mechanism 11, such as... Figures 1-3As shown, the first planetary mechanism 11 is located to the left of the second planetary mechanism 12, that is, to the left of the second planetary gear 123. Simultaneously, the second planetary carrier 124 is connected to the right side of the second planetary gear 123 and extends to the right side of the second planetary mechanism 12. In other words, the first planetary mechanism 11 is located on one side of the second planetary mechanism 12 and is powered by the engine, while the second planetary carrier 124 is powered by the differential 200 on the other side of the second planetary mechanism 12. This allows at least a portion of the power unit 3, the first planetary mechanism 11, the second planetary gear 123, and the differential 200 to be sequentially mounted axially, achieving a compact and secure installation.

[0040] This allows for a compact installation of the various transmission structures in the power drive assembly 100, and the relative positions of the power unit 3 and the differential 200 are relatively far apart, which can avoid path interference between the power input and power output of the power drive assembly 100 and improve the rationality of the structural layout.

[0041] In some embodiments, the power drive assembly 100 further includes a transmission mechanism 2, which is used to selectively connect the first planetary mechanism 11 to one of the second sun gear 121 and the second ring gear 122. That is, the power between the first planetary mechanism 11 and the second planetary mechanism 12 can be flexibly and actively switched through the transmission mechanism 2. Specifically, the transmission mechanism 2 can actively connect the first planetary mechanism 11 to the second sun gear 121 or actively connect the first planetary mechanism 11 to the second ring gear 122 to actively switch the connection state of the two power paths.

[0042] Therefore, the transmission mechanism 2 enables active switching of the power connection mode of the power drive assembly 100, achieving automated control switching and improving the automation level of drive operation. The transmission mechanism 2 can be connected to the vehicle's control system, allowing the driver to actively operate it from the control system.

[0043] In some embodiments, the transmission mechanism 2 includes a transmission shaft 21 and a switching element 22. The transmission shaft 21 is poweredly connected to the first planetary mechanism 11. The transmission shaft 21 can be relatively fixed to the output end of the first planetary mechanism 11, so that when the first planetary mechanism 11 outputs power, the output end of the first planetary mechanism 11 can drive the transmission shaft 21 to rotate together. In other words, when the power unit 3 drives the vehicle, the transmission shaft 21 can maintain rotation under the driving action of the power unit 3.

[0044] The switching element 22 is movably mounted on the drive shaft 21 and is selectively connected to one of the second sun gear 121 and the second gear ring 122, meaning the mounting position of the switching element 22 is adjustable. It should be noted that the switching element 22 can be circumferentially coupled to the drive shaft 21, and the switching element 22 can be configured to move axially along the drive shaft 21. Thus, when the switching element 22 is moved closer to the second sun gear 121, the drive shaft 21 drives the switching element 22 and the second sun gear 121 to rotate, meaning the driving force of the power unit 3 switches to the first power path. Conversely, when the switching element 22 is moved closer to the second gear ring 122, the drive shaft 21 drives the switching element 22 and the second gear ring 122 to rotate, meaning the driving force of the power unit 3 switches to the second power path. Therefore, switching between the two power paths can be achieved by driving the switching element 22 to move along the drive shaft 21. The structure is simple, and the control method is easy to implement.

[0045] Furthermore, in actual design, the switching between the two power paths can be achieved by setting a linear motor to actively push the switching element 22, which is simple in structure.

[0046] It should be noted that when the drive shaft 21 is connected to one of the second sun gear 121 and the second ring gear 122 via the switching element 22, the other of the second sun gear 121 and the second ring gear 122 can be fixed to avoid the problem of rotational drag and reduce power consumption.

[0047] In some embodiments, the second planetary mechanism 12 further includes a second sun gear shaft 1212, on which a second sun gear 121 is mounted. The second sun gear shaft 1212 is located at the center of the second planetary mechanism 12, and the second sun gear 121 can be relatively fixed to the second sun gear shaft 1212 so that the second sun gear shaft 1212 and the second sun gear 121 together transmit power between the transmission mechanism 2 and the second planetary gear 123.

[0048] The second sun gear shaft 1212 is a hollow shaft, and the transmission shaft 21 is rotatably mounted on the second sun gear shaft 1212. In this way, the second sun gear shaft 1212 and the transmission shaft 21 can be sleeved together to make the second sun gear shaft 1212 and the transmission shaft 21 share the same axial and radial mounting space. That is, the assembly between the transmission mechanism 2 and the second planetary mechanism 12 is more compact, which can realize the sharing of space and help reduce the overall structural size of the power drive assembly 100.

[0049] Furthermore, by fitting the second sun gear shaft 1212 and the transmission shaft 21 together, the transmission mechanism 2 and the second planetary mechanism 12 can be coaxially distributed, which helps to improve their coaxiality. In turn, during transmission, the accuracy and reliability of power transmission can be improved, and the problem of power transmission failure due to misalignment of transmission components can be avoided.

[0050] In some embodiments, at least a portion of the second gear ring 122 is sleeved outside the switching element 22, so that the second gear ring 122 and the switching element 22 share a portion of the axial and radial mounting space, which is beneficial to achieve compact installation of the transmission mechanism 2 and the second planetary mechanism 12 and reduce the overall space occupation.

[0051] The second gear ring 122 is connected to the first transmission part 1221, and the second sun gear 121 is connected to the second transmission part 1211. The first transmission part 1221 and the second transmission part 1211 are located at both ends of the switching element 22, and the first transmission part 1221 and the second transmission part 1211 are selectively connected to the switching element 22 so that the switching element 22 can selectively transmit the power on the transmission shaft 21 to the first transmission part 1221 or the second transmission part 1211, thereby driving the second gear ring 122 or the second sun gear 121 to rotate.

[0052] Specifically, such as Figures 1-3 As shown, the left side of the second gear ring 122 is fitted over the switching element 22, and a first transmission part 1221 is formed at the left end of the second gear ring 122. The first transmission part 1221 and the switching element 22 are axially opposite each other. When the switching element 22 moves to the left, it can engage with the first transmission part 1221 to achieve power transmission from the switching element 22 toward the second gear ring 122. Also, as... Figures 1-3 As shown, a second transmission part 1211 is provided at the left end of the second sun gear shaft 1212. The second sun gear 121 is fixedly connected to the second transmission part 1211 through the second sun gear shaft 1212. The second transmission part 1211 is located on the right side of the switching element 22 and is axially opposite to the switching element 22. When the switching element 22 moves to the right, it can engage with the second transmission part 1211 to realize the power transmission of the switching element 22 toward the second sun gear 121.

[0053] Thus, the first transmission part 1221 and the second transmission part 1211 are distributed on opposite sides of the axial direction of the switching element 22, which not only facilitates the connection between the switching element 22 and one of the first transmission part 1221 and the second transmission part 1211, but also enables the compact installation of the three structural components in the axial direction, which is conducive to achieving miniaturization.

[0054] In some embodiments, the centerline of the first planetary mechanism 11, the axis of the transmission shaft 21, and the centerline of the second planetary mechanism 12 are located on the same straight line. The first planetary mechanism 11 includes a first sun gear 111, and the second planetary mechanism 12 includes a second sun gear 121. By setting the axes of the first sun gear 111, the transmission shaft 21, and the second sun gear 121 to be collinear and coincident, the coaxiality of the three mechanisms can be guaranteed when the transmission mechanism 2 is connected to the first planetary mechanism 11 and the second planetary mechanism 12, respectively. This ensures accurate and reliable transmission between the three mechanisms, thereby guaranteeing transmission efficiency.

[0055] Specifically, such as Figures 1-3 As shown, the first planetary mechanism 11, the drive shaft 21, and the second planetary mechanism 12 are distributed sequentially along the axis of the drive shaft 21, and the first sun gear 111, the drive shaft 21, and the second sun gear 121 are directly opposite each other in the axial direction of the drive shaft 21, making the transmission structure more reliable.

[0056] In some embodiments, the first planetary mechanism 11 includes a first sun gear 111, a first ring gear 112, and a first planet gear 113. The first planet gear 113 meshes with the first sun gear 111 and the first ring gear 112, respectively. The first sun gear 111 is powered by the power unit 3, and the first planet gear 113 is connected to a first planet carrier 114. The first planet carrier 114 is used for selectively powered connection with the second planetary mechanism 12.

[0057] In other words, the power unit 3 can output driving force to the first sun gear 111, and then transmit it to the first planetary carrier 114 through the first planetary gear 113, and then selectively output it from the first planetary carrier 114 to the second sun gear 121 or the second ring gear 122, thereby realizing the power transmission inside the first planetary mechanism 11.

[0058] In a further embodiment, the power drive assembly 100 also includes a drive housing. The first planetary mechanism 11 and the second planetary mechanism 12 are both mounted on the drive housing. The drive housing can protect each component of the first planetary mechanism 11 and the second planetary mechanism 12 to ensure that each component of the planetary gear assembly is in a relatively stable environment, prevent external structures or debris from entering the transmission and engagement positions of the planetary gear assembly, and ensure the safety of the planetary gear assembly operation.

[0059] The first gear ring 112 is fixed relative to the drive housing, meaning the drive housing can brake and fix the first gear ring 112, ensuring it remains relatively fixed during transmission of the first planetary mechanism 11. In other words, when the power unit 3 outputs power to the first sun gear 111, the sun gear 111 drives the first planet gear 113 to rotate, and the first planet gear 113, while rotating on its own axis, revolves around the first gear ring 112, thus transmitting power to the second planetary mechanism 12 via the first planet carrier 114. This achieves a first-stage reduction within the first planetary mechanism 11, facilitating effective vehicle drive.

[0060] Additionally, it should be noted that when the drive shaft 21 is powered to one of the second sun gear 121 and the second ring gear 122 via the switching element 22, the other of the second sun gear 121 and the second ring gear 122 can be fixed to the drive housing to avoid the problem of rotational drag and reduce power consumption.

[0061] Specifically, such as Figures 1-3 As shown, the second sun gear 121 connected to the second sun gear 121 shaft 1212 can be selectively fixed to the drive housing, and the second gear ring 122 can also be selectively fixed to the drive housing. When the switching element 22 is poweredly connected to the second sun gear 121, the second gear ring 122 is fixed to the drive housing; when the switching element 22 is poweredly connected to the second gear ring 122, the second sun gear 121 is fixed to the drive housing. This ensures stable transmission of driving force, reduces drive drag, and lowers power consumption waste.

[0062] In some embodiments, the power unit 3, the first planetary mechanism 11, and the second planetary mechanism 12 are arranged opposite each other along the lateral direction of the vehicle, such as... Figures 1-3 As shown, the power unit 3, the first planetary gear set 11, and the second planetary gear set 12 are arranged facing each other in the left-right direction, and the differential 200 and the second planetary gear set 12 are arranged in the up-down direction, that is, along the longitudinal direction of the vehicle. As a result, the installation of the various components of the power drive assembly 100 can be more compact, and the advantage of the small axial space occupation of the two planetary gear sets can be effectively utilized to install the various components in the vehicle with a small space occupation ratio, reducing the installation difficulty.

[0063] The following is in conjunction with the appendix Figures 1-3 Describes the power connection states of the power drive assembly 100 of the present invention in different modes: like Figure 1As shown, at this time, the switching element 22 of the transmission mechanism 2 is in a relatively central position on the transmission shaft 21, that is, the switching element 22 is separated from both the first transmission part 1221 and the second transmission part 1211. The output shaft of the power unit 3 and the first sun gear 111 of the first planetary mechanism 11 are coaxial, thereby transmitting power to the first planetary mechanism 11. The two planetary mechanisms are connected in series, the first ring gear 112 is fixed on the drive housing, and the first planetary carrier 114 outputs power to the transmission mechanism 2. The switching element 22 of the transmission mechanism 2 is in the central position with no power output, and the second sun gear 121 is locked, that is, the second ring gear 122 is loosely fitted on the transmission mechanism 2, and the second sun gear 121 is locked. At this time, the planetary gear assembly is in neutral. When the vehicle is coasting in neutral, the differential gear 201 acts as the input source, driving the second planetary carrier 124 to rotate. At this time, the second sun gear 121 is locked, the second ring gear 122 rotates freely, and the power at the wheel end and the power end are completely disconnected.

[0064] like Figure 2 As shown, in the off-road escape mode of the whole vehicle, it can be switched to the first low-speed condition. At this time, the output shaft of the power unit 3 and the first sun gear 111 are coaxial, thereby transmitting the driving force to the first planetary mechanism 11. The two planetary mechanisms are connected in series. The first ring gear 112 is fixed on the drive housing. The power is output to the transmission mechanism 2 by the first planetary carrier 114. This is the first-stage reduction. When switching to the first low-speed gear, the switching element 22 moves on the drive shaft 21 towards the second sun gear 121. The transmission mechanism 2 and the second sun gear 121 are engaged through the gear engagement. At the same time, the second ring gear 122 is fixed to the drive housing. The power is input to the second sun gear 121 through the transmission mechanism 2 and then output by the second planetary carrier 124. This is the second-stage reduction. At this time, the two-stage reduction ratio of the planetary gear set assembly is (K1+1)(K2+1). Finally, the output gear 1241 of the second planetary carrier 124 meshes with the differential gear 201 to transmit the power to the wheels.

[0065] And, such as Figure 3 As shown, when switching to second-gear high-speed mode under normal operating conditions, the output shaft of the power unit 3 and the first sun gear 111 are coaxial, thus transmitting the driving force to the first planetary mechanism 11. The two planetary mechanisms are connected in series, and the first ring gear 112 is fixed on the drive housing. Power is output to the transmission mechanism 2 by the first planetary carrier 114. This is the first-stage reduction. When switching to second-gear high-speed mode, the switching element 22 moves on the drive shaft 21 towards the second ring gear 122. The transmission mechanism 2 and the second ring gear 122 engage through the meshing teeth. At the same time, the second sun gear 121 is fixed. Power is input to the second ring gear 122 through the transmission mechanism 2 and then output by the second planetary carrier 124. This is the second-stage reduction. At this time, the two-stage reduction ratio of the planetary gear set assembly is (K1+1)(1 / K2+1). Finally, the output gear 1241 of the second planetary carrier 124 meshes with the differential gear 201 to output power to the wheel ends.

[0066] The present invention also proposes a vehicle.

[0067] The vehicle according to the present invention includes the power drive assembly 100 of any of the above embodiments. By setting the first planetary mechanism 11 and the second planetary mechanism 12 to transmit power between the power unit 3 and the differential 200, it can not only realize the power transmission of two power paths to meet different power drive requirements, but also realize the compact installation of the planetary gear assembly, which is conducive to reducing the overall structural size of the power drive assembly 100, facilitating the installation and layout in the whole vehicle, and reducing the installation difficulty.

[0068] Therefore, by setting up this power drive assembly 100, the vehicle can meet the power requirements under different operating conditions, improve the vehicle's driving performance, enhance the user's driving experience, and have low overall energy consumption.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A power drive assembly, characterized in that, include: Power unit (3); The planetary gear assembly includes a first planetary mechanism (11) and a second planetary mechanism (12), the power unit (3) is poweredly connected to the first planetary mechanism (11), the second planetary mechanism (12) has two power paths, and the first planetary mechanism (11) is selectively poweredly connected to the differential (200) through one of the two power paths.

2. The power drive assembly according to claim 1, characterized in that, The second planetary mechanism (12) includes a second sun gear (121), a second ring gear (122), and a second planet gear (123). The second planet gear (123) meshes with the second sun gear (121) and the second ring gear (122) respectively. The first planetary mechanism (11) is selectively powered by one of the second sun gear (121) and the second ring gear (122). The second sun gear (121) and the second planet gear (123) are used to form the first power path, and the second gear ring (122) and the second planet gear (123) are used to form the second power path.

3. The power drive assembly according to claim 2, characterized in that, The second planetary mechanism (12) further includes a second planetary carrier (124), the second planetary gear (123) is mounted on the second planetary carrier (124), and the second planetary gear (123) is poweredly connected to the differential (200) through the second planetary carrier (124).

4. The power drive assembly according to claim 3, characterized in that, The second planetary carrier (124) is located on the side of the second planetary gear (123) away from the first planetary mechanism (11).

5. The power drive assembly according to claim 2, characterized in that, It also includes a transmission mechanism (2) for selectively powering the first planetary mechanism (11) to one of the second sun gear (121) and the second ring gear (122).

6. The power drive assembly according to claim 5, characterized in that, The transmission mechanism (2) includes a transmission shaft (21) and a switching element (22). The transmission shaft (21) is poweredly connected to the first planetary mechanism (11). The switching element (22) is movably mounted on the transmission shaft (21) and is used to selectively connect to one of the second sun gear (121) and the second ring gear (122).

7. The power drive assembly according to claim 6, characterized in that, The second planetary mechanism (12) also includes a second sun gear (121) shaft, the second sun gear (121) being mounted on the second sun gear (121) shaft; The second sun gear (121) shaft is constructed as a hollow shaft, and the transmission shaft (21) is rotatably mounted on the second sun gear (121) shaft.

8. The power drive assembly according to claim 6, characterized in that, At least a portion of the second gear ring (122) is fitted over the switching element (22); The second gear ring (122) is connected to the first transmission part (1221), the second sun gear (121) is connected to the second transmission part (1211), the first transmission part (1221) and the second transmission part (1211) are located at both ends of the switching element (22) and are selectively connected to the switching element (22) respectively.

9. The power drive assembly according to claim 6, characterized in that, The centerline of the first planetary mechanism (11), the axis of the drive shaft (21), and the centerline of the second planetary mechanism (12) are on the same straight line.

10. The power drive assembly according to claim 1, characterized in that, The first planetary mechanism (11) includes a first sun gear (111), a first gear ring (112), and a first planet gear (113), wherein the first planet gear (113) meshes with the first sun gear (111) and the first gear ring (112), respectively; The first sun gear (111) is powered to the power unit (3), and the first planet gear (113) is connected to the first planet carrier (114). The first planet carrier (114) is used to selectively power to the second planetary mechanism (12).

11. The power drive assembly according to claim 10, characterized in that, It also includes a drive housing, on which the first planetary mechanism (11) and the second planetary mechanism (12) are both mounted, and the first gear ring (112) is fixed relative to the drive housing.

12. The power drive assembly according to claim 1, characterized in that, The power unit (3), the first planetary mechanism (11) and the second planetary mechanism (12) are arranged in a lateral arrangement facing each other along the vehicle.

13. A vehicle, characterized in that, The power drive assembly included in any one of claims 1-12.

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