Transmission assembly, drive axle and vehicle

Abstract

The present invention relates to the technical field of drive axles, and discloses a transmission assembly, a drive axle, and a vehicle. The transmission assembly includes: a transmission housing having a first bearing seat and a second bearing seat spaced apart along a first direction, the axes of the first bearing seat and the second bearing seat coinciding; a first bearing, the first bearing being disposed on the first bearing seat; a second bearing, the second bearing being disposed on the second bearing seat; a planetary reducer assembly, the planetary reducer assembly being disposed within the transmission housing, the planetary reducer assembly including a ring gear rotatably supported on the first bearing; an input transmission member, the input transmission member being disposed within the transmission housing, the input transmission member being rotatably supported on the second bearing, the planetary reducer assembly being in transmission connection with the input transmission member. According to the transmission assembly of the present invention, the coaxiality of the axes between the rotating bodies is improved, the structural rigidity of the transmission housing is improved, and the reliability of the support for the rotating bodies is improved, thereby improving NVH performance.

Description

Technical Field

[0001] The present invention relates to the technical field of drive axles, and in particular to a transmission assembly, a drive axle and a vehicle. Background Art

[0002] In the prior art, the bearings on both sides of the transmission assembly are designed to be located inside the motor housing and the axle housing, respectively. The two housings are bolted together, and the transmission assembly bearings are machined separately in each housing, processed twice, and then assembled together. This results in poor coaxiality of the rotational centers of the two bearings in the transmission assembly. Furthermore, the two bearings are located in two separate housings, and the stiffness of the motor housing and the axle housing is inconsistent. Since both housings bear the load, the two bearings strain with the housings under load, causing their rotational positions to deviate from the designed positions. The large difference in housing stiffness causes asynchronous offset, resulting in poor coaxiality, poor support, and poor NVH performance. Summary of the Invention

[0003] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention provides a transmission assembly that improves the coaxiality of the axes between rotating bodies, such as a first bearing, a second bearing, a planetary reducer assembly, and an input transmission member, while also increasing the structural rigidity of the transmission housing and enhancing NVH performance.

[0004] The present invention also provides a drive axle, comprising the above-mentioned transmission assembly.

[0005] The present invention also provides a vehicle comprising the above-mentioned drive axle.

[0006] According to an embodiment of the present invention, a transmission assembly includes: a transmission housing, the transmission housing having a first bearing seat and a second bearing seat spaced apart along a first direction, the axes of the first bearing seat and the second bearing seat coinciding; a first bearing, the first bearing being arranged on the first bearing seat; a second bearing, the second bearing being arranged on the second bearing seat; a planetary reducer assembly, the planetary reducer assembly being arranged in the transmission housing, the planetary reducer assembly including a ring gear, the ring gear being rotatably supported on the first bearing; an input transmission member, the input transmission member being arranged in the transmission housing, the input transmission member being rotatably supported on the second bearing, the planetary reducer assembly being transmission-connected to the input transmission member.

[0007] According to the transmission assembly of an embodiment of the present invention, the axes of the first bearing seat and the second bearing seat coincide; the first bearing is arranged on the first bearing seat, the second bearing is arranged on the second bearing seat, the planetary reducer assembly is arranged in the transmission housing, the planetary reducer assembly includes a ring gear, and the ring gear is rotatably supported on the first bearing; the input transmission member is arranged in the transmission housing, and the input transmission member is rotatably supported on the second bearing, so that the first bearing seat, the second bearing seat and the transmission housing are designed to share a shell, thereby improving the coaxiality of the axes between rotating bodies such as the first bearing, the second bearing, the planetary reducer assembly and the input transmission member, and improving the structural stiffness of the transmission housing, and also improving the support reliability of rotating bodies such as the first bearing, the second bearing, the planetary reducer assembly and the input transmission member, thereby improving NVH performance.

[0008] In some embodiments of the present invention, there are two second bearing seats, the two second bearing seats are spaced apart in the first direction, there are two second bearings, and they correspond one-to-one to the two second bearing seats, and the two ends of the input transmission member in the first direction are respectively supported by the two second bearings.

[0009] In some embodiments of the present invention, the transmission housing further has an annular planetary mount, which is coaxially arranged with the first bearing seat and the second bearing seat, and the planetary reducer assembly further includes a planetary fixing frame, which is connected to the planetary mounting seat.

[0010] In some embodiments of the present invention, along the first direction, the planetary mount is disposed between the first bearing seat and the second bearing seat.

[0011] In some embodiments of the present invention, the planetary reducer assembly also includes: a sun gear, which is connected to the input transmission member; a planetary carrier, which is relatively fixed to the transmission housing; a planetary carrier, which is rotatably arranged on the planetary carrier; a plurality of planetary wheels, which are rotatably arranged on the planetary carrier, and the plurality of planetary wheels are arranged radially outside the sun gear and meshed with the sun gear, and the ring gear is arranged on the outside of the plurality of planetary wheels and meshed with the inside of the plurality of planetary wheels.

[0012] In some embodiments of the present invention, the planetary reducer assembly further includes: a shift assembly, which is fixed to the planetary carrier, and the shift assembly has a first state and a second state. In the first state, the shift assembly is relatively fixed to the planetary carrier, and in the second state, the shift assembly is separated from the planetary carrier.

[0013] In some embodiments of the present invention, the planetary fixed frame has a first limit member, and the shift assembly includes: a fixed member and a shift member, the fixed member is fixed to the planetary frame, and the shift member is movable between a first position and a second position relative to the fixed member. In the first position, the shift member is connected to the first limit member, and the shift assembly switches to the first state; in the second position, the shift member is separated from the first limit member, and the shift assembly switches to the second state.

[0014] In some embodiments of the present invention, the planetary carrier includes a bracket portion and a first shaft portion, the planetary gear is arranged on the bracket portion, the first shaft portion is connected to the bracket portion and extends along the first direction, and the fixing member is annular and extends along the circumference of the first shaft portion and is sleeved and fixed on the outer side of the first shaft portion.

[0015] In some embodiments of the present invention, the planetary carrier and the shift assembly are arranged in the first direction, and the shift member is movably provided on the fixing member between the first position and the second position along the first direction.

[0016] In some embodiments of the present invention, the fixing member and the shifting member are both annular, and the shifting member is sleeved on the outside of the fixing member. A first limiting protrusion is provided on the inner peripheral wall of the shifting member, and a first limiting groove extending along the first direction is provided on the outer peripheral wall of the fixing member. The first limiting protrusion is engaged with the first limiting groove and can slide relative to the first limiting groove along the first direction.

[0017] In some embodiments of the present invention, a second limiting groove extending along the first direction is provided on the outer peripheral wall of the first limiting member, and when the blocking member is in the first position, a portion of the first limiting protrusion fits in the second limiting groove, and the other portion fits in the first limiting groove.

[0018] In some embodiments of the present invention, the transmission assembly further includes: an output transmission component, one end of which is transmission-connected to the input transmission member, and the other end of which is suitable for transmission connection to the motor.

[0019] In some embodiments of the present invention, the output transmission assembly is a gear transmission assembly, the input transmission member is a gear member, and the output transmission assembly includes: a first gear, a second gear and a third gear, the first gear is suitable for being connected to the motor shaft of the motor, the second gear and the third gear are coaxially fixed, the second gear is engaged with the first gear, and the third gear is engaged with the input transmission member.

[0020] In some embodiments of the present invention, a partition is provided in the transmission housing to divide the space in the transmission housing into a first cavity and a second cavity. The planetary reducer assembly, the first bearing seat, the second bearing seat, and the input transmission member are all located in the first cavity, and the output transmission assembly is located in the second cavity.

[0021] In some embodiments of the present invention, a first oil injection hole and a second oil injection hole connected to the oil pump are formed in the transmission housing, the first oil injection hole is connected to the first cavity, the second oil injection hole is connected to the second cavity, and there is an oil return hole on the partition, and the transmission housing is configured to allow the oil in the first cavity to flow to the second cavity through the oil return hole under the action of gravity.

[0022] In some embodiments of the present invention, the highest height of the oil at the bottom of the second cavity is lower than the lowest position of the output transmission assembly.

[0023] In some embodiments of the present invention, the oil return hole is located at the bottom of the first cavity, and a one-way valve is provided in the oil return hole for controlling the one-way flow of oil from the first cavity to the second cavity.

[0024] In some embodiments of the present invention, the oil return hole is located at the bottom of the first cavity, and the lowest point of the first cavity is higher than the highest height of the oil at the bottom of the second cavity.

[0025] In some embodiments of the present invention, the transmission assembly further includes a filter, wherein an inlet of the filter is connected to an outlet of the oil pump.

[0026] In some embodiments of the present invention, the filter includes a coarse filter and a fine filter connected in series, and the coarse filter is connected to a side of the fine filter facing the oil pump inlet.

[0027] In some embodiments of the present invention, the transmission assembly further includes an oil cooler, which is communicated with the filter and is located on a side of the filter away from the oil pump along the oil flow direction.

[0028] In some embodiments of the present invention, the inner wall surface of the first cavity is an arc surface; and / or the inner wall surface of the second cavity is an arc surface.

[0029] According to an embodiment of the present invention, the drive axle includes: the above-mentioned transmission assembly; two half-shafts, the two half-shafts extending along the first direction and arranged at intervals along the first direction, the facing ends of the two half-shafts both extending into the transmission housing and respectively connected to the planetary reducer assembly; and a motor assembly, the motor assembly including a motor, and the motor being connected to the input transmission member.

[0030] According to the drive axle of an embodiment of the present invention, by setting the above-mentioned transmission assembly, the axes of the first bearing seat and the second bearing seat coincide; the first bearing is arranged on the first bearing seat, the second bearing is arranged on the second bearing seat, and the planetary reducer assembly is arranged in the transmission housing, the planetary reducer assembly includes a ring gear, and the ring gear is rotatably supported on the first bearing; the input transmission member is arranged in the transmission housing, and the input transmission member is rotatably supported on the second bearing, so that the first bearing seat, the second bearing seat and the transmission housing are designed to share a shell, thereby improving the coaxiality of the axes between rotating bodies such as the first bearing, the second bearing, the planetary reducer assembly and the input transmission member, and improving the structural stiffness of the transmission housing, and also improving the support reliability of rotating bodies such as the first bearing, the second bearing, the planetary reducer assembly and the input transmission member, thereby improving the NVH performance.

[0031] In some embodiments of the present invention, the motor assembly further includes a motor housing, and the motor housing and the transmission housing are an integrated piece.

[0032] A vehicle according to an embodiment of the present invention includes the aforementioned drive axle.

[0033] According to the vehicle of an embodiment of the present invention, by setting the above-mentioned drive axle and the above-mentioned transmission assembly, the axes of the first bearing seat and the second bearing seat coincide; the first bearing is set on the first bearing seat, the second bearing is set on the second bearing seat, and the planetary reducer assembly is set in the transmission housing, the planetary reducer assembly includes a ring gear, and the ring gear is rotatably supported on the first bearing; the input transmission member is set in the transmission housing, and the input transmission member is rotatably supported on the second bearing, so that the first bearing seat, the second bearing seat and the transmission housing are designed to share a shell, thereby improving the coaxiality of the axes between rotating bodies such as the first bearing, the second bearing, the planetary reducer assembly and the input transmission member, and improving the structural stiffness of the transmission housing, and also improving the support reliability of rotating bodies such as the first bearing, the second bearing, the planetary reducer assembly and the input transmission member, thereby improving the NVH performance.

[0034] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0036] Figure 1 is a partial cross-sectional view of a front view of a drive axle according to an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0038] Figure 3 is an exploded view of a transmission assembly according to an embodiment of the present invention;

[0039] Figure 4 is a perspective view of a transmission assembly according to an embodiment of the present invention;

[0040] Figure 5 is a front view of a transmission assembly according to an embodiment of the present invention;

[0041] Figure 6 is an exploded view of a transmission assembly according to an embodiment of the present invention from another perspective, wherein an oil circuit is shown;

[0042] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0043] Reference numerals:

[0044] 100. Drive axle;

[0045] 10. Transmission assembly;

[0046] 1. Transmission housing; 11. First bearing seat; 12. Second bearing seat; 13. Planetary mounting seat; 14. First cavity; 15. Second cavity; 16. Partition plate; 17. Oil return hole; 18. Oil pipeline; 181. First pipeline; 182. Second pipeline; 183. Third pipeline;

[0047] 2. Planetary reducer assembly; 21. Ring gear; 22. Planetary fixing frame; 221. First stopper; 23. Planetary carrier; 231. First shaft; 232. Bracket; 24. Planetary gear; 25. Sun gear; 26. Shift assembly; 261. Fixing member; 262. Shift member; 27. Differential;

[0048] 3. First bearing;

[0049] 4. Second bearing;

[0050] 5. Input transmission parts;

[0051] 6. Output transmission assembly; 61. First gear; 62. Second gear; 63. Third gear;

[0052] 7. Filter; 71. Coarse filter; 72. Fine filter;

[0053] 8. Oil cooler;

[0054] 9. Oil pump;

[0055] 20. Half shaft;

[0056] 30. Motor assembly;

[0057] 40. Wheel hub assembly;

[0058] 50. Brake assembly;

[0059] 60. Bridge shell. DETAILED DESCRIPTION

[0060] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0062] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0063] Reference below Figure 1-Figure 7 A transmission assembly 10 according to an embodiment of the present invention is described.

[0064] like Figure 1-Figure 7 As shown, the transmission assembly 10 according to an embodiment of the present invention includes: a transmission housing 1 , a first bearing 3 , a second bearing 4 , a planetary reducer assembly 2 and an input transmission member 5 .

[0065] Specifically, refer to Figure 1-Figure 4 The transmission housing 1 has a first direction (such as Figure 1The first bearing seat 11 and the second bearing seat 12 are spaced apart from each other (in the c direction shown in the figure), and the axes of the first bearing seat 11 and the second bearing seat 12 coincide with each other; the first bearing 3 is arranged on the first bearing seat 11, and the second bearing 4 is arranged on the second bearing seat 12. The planetary reducer assembly 2 is arranged in the transmission housing 1, and the planetary reducer assembly 2 includes a ring gear 21, which is rotatably supported on the first bearing 3; the input transmission member 5 is arranged in the transmission housing 1, and the input transmission member 5 is rotatably supported on the second bearing 4. The planetary reducer assembly 2 is transmission-connected to the input transmission member 5.

[0066] It can be understood that the first bearing seat 11, the second bearing seat 12 and the transmission housing 1 are an integral part. On the one hand, the positions of the first bearing seat 11 and the second bearing seat 12 are relatively fixed, and the axis coincidence is high. On the other hand, when the transmission housing 1 is subjected to vibration deformation, the deformation of the first bearing seat 11 and the second bearing seat 12 is equivalent, thereby avoiding the axis offset of the first bearing seat 11 and the second bearing seat 12 when the transmission housing 1 is subjected to vibration deformation.

[0067] Therefore, when the first bearing 3 is arranged on the first bearing seat 11 and the second bearing 4 is arranged on the second bearing seat 12, the coaxiality of the axes of the first bearing 3 and the second bearing 4 can be improved. Since the ring gear 21 is rotatably supported on the first bearing 3 and the input transmission member 5 is rotatably supported on the second bearing 4, the coaxiality of the axes between the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5 is improved, thereby ensuring the consistency of the design benchmark and process benchmark of the transmission assembly 10.

[0068] And because the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5 are located in the same transmission housing 1, they can be clamped and processed in one step, thereby avoiding the processing errors or assembly errors caused by the assembly between different housings when the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5 are located in different housings, and further ensuring the coaxiality of the axes between the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5.

[0069] In addition, since the first bearing seat 11 and the second bearing seat 12 are integrated with the transmission housing 1, the structural rigidity of the transmission housing 1 is improved, and the support reliability of rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5 is also improved, thereby improving the NVH (Noise, Vibration, and Harshness) performance.

[0070] Furthermore, if Figure 1-Figure 4As shown, the ring gear 21 is rotatably supported on the first bearing 3, so that the ring gear 21 can rotate between the transmission housing 1, thereby avoiding an overly rigid connection between the ring gear 21 and the transmission housing 1, thereby reducing the vibration transmission between the transmission housing 1 and the ring gear 21, thereby reducing the probability of damage to the ring gear 21 and the internal parts of the planetary reducer assembly 2, and improving the service life of the planetary reducer assembly 2.

[0071] Furthermore, if Figure 1-Figure 4 As shown, the planetary reducer assembly 2 is drivingly connected to the input transmission member 5, which is in turn drivingly connected to the motor assembly 30. The transmission housing 1 is open on one side radially along the first bearing seat 11, thereby facilitating assembly of the planetary reducer assembly 2 and the input transmission member 5 into the transmission housing 1 through the open opening on the side radially along the first bearing seat 11. Simultaneously, the side radially along the first bearing seat 11 of the transmission housing 1 can be connected to the axle housing 60, thereby sealing the open opening.

[0072] Furthermore, if Figure 1-Figure 4 As shown, along the first direction, the planetary reducer assembly 2 is arranged between the first bearing seat 11 and the second bearing seat 12, and the input transmission member 5 is arranged on the side of the planetary reducer assembly 2 facing the second bearing seat 12.

[0073] According to the transmission assembly 10 of an embodiment of the present invention, the axes of the first bearing seat 11 and the second bearing seat 12 coincide; the first bearing 3 is arranged on the first bearing seat 11, the second bearing 4 is arranged on the second bearing seat 12, the planetary reducer assembly 2 is arranged in the transmission housing 1, and the planetary reducer assembly 2 includes a ring gear 21, which is rotatably supported on the first bearing 3; the input transmission member 5 is arranged in the transmission housing 1, and the input transmission member 5 is rotatably supported on the second bearing 4, so that the first bearing seat 11, the second bearing seat 12 and the transmission housing 1 are designed to be co-shelled, thereby improving the coaxiality of the axes between rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5, and improving the structural stiffness of the transmission housing 1, and also improving the support reliability of rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5, thereby improving the NVH performance.

[0074] In some embodiments of the present invention, Figure 1-Figure 4 As shown, there are two second bearing seats 12, and the two second bearing seats 12 are spaced apart in the first direction. There are two second bearings 4, which correspond one-to-one to the two second bearing seats 12, and the two ends of the input transmission member 5 in the first direction are respectively supported on the two second bearings 4.

[0075] It can be understood that the two second bearings 4 support the rotation of the input transmission member 5, making the rotation of the input transmission member 5 more stable. At the same time, the axes of the two second bearing seats 12 coincide, further improving the coaxiality of the axes between the first bearing 3, the second bearing 4, the planetary reducer assembly 2, and the input transmission member 5, thereby increasing the structural rigidity of the transmission housing 1 and the reliability of the support for the first bearing 3, the second bearing 4, the planetary reducer assembly 2, and the input transmission member 5, thereby improving NVH performance.

[0076] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the transmission housing 1 further has an annular planetary mounting seat 13 , which is coaxially arranged with the first bearing seat 11 and the second bearing seat 12 . The planetary reducer assembly 2 further includes a planetary fixing frame 22 , which is connected to the planetary mounting seat 13 .

[0077] It can be understood that by arranging the planetary mounting seat 13 coaxially with the first bearing seat 11 and the second bearing seat 12, the coaxiality of the axes between the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5 is further improved, and the structural stiffness of the transmission housing 1 is improved, and the support reliability of the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5 is also improved, thereby improving the NVH performance.

[0078] In some embodiments of the present invention, Figure 1-Figure 4 As shown, along the first direction, the planetary mounting seat 13 is arranged between the first bearing seat 11 and the second bearing seat 12. Therefore, the planetary mounting seat 13 is reasonably installed and can better support the planetary reducer assembly 2.

[0079] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the planetary reducer assembly 2 further includes: a sun gear 25 , a planetary fixing frame 22 , a planetary carrier 23 , and a plurality of planetary gears 24 .

[0080] The sun gear 25 is connected to the input transmission member 5; the planetary carrier 22 is relatively fixed to the transmission housing 1; the planetary carrier 23 is rotatably provided on the planetary carrier 22; the planetary gears 24 are rotatably provided on the planetary carrier 23, and the multiple planetary gears 24 are arranged on the radial outside of the sun gear 25 and meshed with the sun gear 25. The ring gear 21 is sleeved on the outside of the multiple planetary gears 24 and meshed with the inside of the multiple planetary gears 24.

[0081] It can be understood that the planetary reducer assembly 2 also includes a differential 27. The input transmission member 5 transmits power to the sun gear 25. The sun gear 25 rotates and transmits power to the planetary gears 24 (the planetary gears 24 can rotate on their own or revolve along the sun gear 25). The planetary gears 24 transmit power to the ring gear 21. The ring gear 21 is connected to the housing of the differential 27, so that the power is transmitted to the differential 27 through the rotation of the ring gear 21. The differential 27 is connected to the two half-shafts 20, and the two half-shafts 20 are respectively connected to the two wheel hub assemblies 40, thereby realizing power transmission and realizing the driving of the vehicle.

[0082] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the planetary reducer assembly 2 also includes: a shift assembly 26, which is fixed to the planet carrier 23. The shift assembly 26 has a first state and a second state. In the first state, the shift assembly 26 is relatively fixed to the planetary fixed frame 22. In the second state, the shift assembly 26 is separated from the planetary fixed frame 22.

[0083] It can be understood that in the first state, the shift assembly 26 is relatively fixed to the planetary carrier 22. Since the shift assembly 26 is fixed to the planetary carrier 23, the planetary carrier 22 and the planetary carrier 23 are relatively fixed. At this time, the planetary gear 24 cannot revolve and can only rotate on its own, so that a transmission speed ratio is established between the sun gear 25 and the ring gear 21, achieving deceleration and upshifting, and the vehicle can climb a slope, etc.

[0084] In the second state, the shift assembly 26 is separated from the planetary carrier 22, and the planetary carrier 23 is released, allowing the planetary carrier 23 to rotate, thereby causing the planetary gears 24 to both revolve and rotate. This results in no transmission speed ratio between the sun gear 25 and the ring gear 21, allowing normal driving. Thus, the present application achieves shifting and speed change with a single planetary reducer assembly 2, resulting in a simple structure and good stability.

[0085] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the planetary fixed frame 22 has a first limit member 221, and the shift assembly 26 includes: a fixed member 261 and a shift member 262. The fixed member 261 is fixed to the planetary frame 23, and the shift member 262 is movable between a first position and a second position relative to the fixed member 261. In the first position, the shift member 262 is connected to the first limit member 221, and the shift assembly 26 is switched to the first state; in the second position, the shift member 262 is separated from the first limit member 221, and the shift assembly 26 is switched to the second state.

[0086] It is understood that in the first position, the shift member 262 is connected to the first limiting member 221, thereby achieving relative fixation between the shift member 262, the fixing member 261, the planet carrier 23, and the planetary carrier 22, thereby enabling downshifting and upshifting, allowing the vehicle to climb a slope, etc. In the second position, the shift member 262 is separated from the first limiting member 221, and the shift assembly 26 is switched to the second state, thereby separating the shift assembly 26 from the planetary carrier 22, releasing the planetary carrier 23, and allowing the planetary carrier 23 to rotate, thereby causing the planetary gears 24 to both revolve and rotate.

[0087] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the planet carrier 23 includes a bracket portion 232 and a first shaft portion 231. The planetary gears 24 are mounted on the bracket portion 232. The first shaft portion 231 is connected to the bracket portion 232 and extends in a first direction. The fixing member 261 is annular and extends along the circumference of the first shaft portion 231 and is fixedly mounted on the outer side of the first shaft portion 231. The fixing member 261 and the first shaft portion 231 can be fixedly connected by a spline, thereby achieving the above-mentioned gear shifting.

[0088] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the planetary carrier 22 and the shift assembly 26 are arranged in a first direction, and the shift member 262 is movably provided on the fixing member 261 between a first position and a second position along the first direction.

[0089] It is understood that the first limiting member 221 is disposed on the side of the planetary carrier 22 that faces the fixed member 261 (for example, in the present invention, the first limiting member 221 is disposed on the side of the planetary carrier 22 that faces the input transmission member 5). Because the shifting member 262 is annular, the axis of the shifting member 262 extends along the first direction, and the shifting member 262 is movably disposed on the fixed member 261 along the first direction between a first position and a second position, movement of the shifting member 262 is relatively easy to achieve, thereby reducing motion interference at the structural level.

[0090] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the fixing member 261 and the shifting member 262 are both annular, and the shifting member 262 is sleeved on the outside of the fixing member 261. A first limiting protrusion is provided on the inner peripheral wall of the shifting member 262, and a first limiting groove extending along the first direction is provided on the outer peripheral wall of the fixing member 261. The first limiting protrusion is matched with the first limiting groove and can slide relative to the first limiting groove along the first direction.

[0091] It can be understood that the first limiting groove passes through the fixing member 261 along the first direction, so that the shifting member 262 can be moved to the first limiting member 221. The mutual cooperation between the first limiting protrusion and the first limiting groove can, on the one hand, avoid the mutual rotation between the shifting member 262 and the fixing member 261, and on the other hand, realize the movement of the shifting member 262 in the first direction to achieve gear shifting.

[0092] Furthermore, the first limiting protrusions and the first limiting grooves are arranged in a plurality along the circumferential direction of the stopper 262 , thereby improving the limiting reliability between the stopper 262 and the fixing member 261 and further avoiding mutual rotation between the stopper 262 and the fixing member 261 .

[0093] In some embodiments of the present invention, Figure 1-Figure 4 As shown, a second limiting groove extending along the first direction is provided on the outer peripheral wall of the first limiting member 221, the blocking member 262 is in the first position, a part of the first limiting protrusion is engaged in the second limiting groove, and the other part is engaged in the first limiting groove.

[0094] It can be understood that the second limiting groove passes through the fixing member 261 along the first direction, so that the shifting member 262 can be moved to the first limiting member 221. The mutual cooperation between the first limiting protrusion and the second limiting groove can, on the one hand, avoid the mutual rotation between the shifting member 262 and the first limiting member 221, thereby improving the connection reliability between the shifting assembly 26, the planetary carrier 23 and the planetary fixing frame 22 in the first state. On the other hand, the movement of the shifting member 262 in the first direction can be realized to achieve gear shifting.

[0095] Furthermore, the second limiting grooves correspond one-to-one to the multiple first limiting protrusions, thereby further avoiding mutual rotation between the shifting member 262 and the first limiting member 221, thereby improving the connection reliability between the shifting assembly 26, the planetary carrier 23 and the planetary fixing frame 22 in the first state.

[0096] In some embodiments of the present invention, Figure 3 As shown, the transmission assembly 10 further includes an output transmission assembly 6, one end of which is transmission-connected to the input transmission member 5 and the other end of which is adapted to be transmission-connected to the motor. Thus, power is transmitted from the motor to the transmission assembly 10, thereby achieving vehicle power output.

[0097] In some embodiments of the present invention, Figure 3 As shown, the output transmission assembly 6 is a gear transmission assembly, and the input transmission member 5 is a gear member, wherein the gear member has a connecting shaft along a first direction, and the second bearing 4 is sleeved outside the connecting shaft.

[0098] The output transmission assembly 6 includes: a first gear 61, a second gear 62 and a third gear 63. The first gear 61 is suitable for being connected to the motor shaft of the motor. The second gear 62 and the third gear 63 are coaxially fixed. The second gear 62 is engaged with the first gear 61. The third gear 63 is engaged with the input transmission member 5.

[0099] It can be understood that the second gear 62 and the third gear 63 are connected by a rotating shaft. The first gear 61 and the second gear 62 form a first set of parallel gears, while the input transmission member 5 and the third gear 63 form a second set of parallel gears. Thus, through this arrangement, two sets of parallel gears can achieve power transmission, resulting in a simple structure, more stable power transmission, and reduced vibration. Furthermore, this arrangement avoids the occurrence of idler gears, further stabilizing power transmission and reducing vibration.

[0100] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, a partition 16 is provided in the transmission housing 1 to divide the space in the transmission housing 1 into a first cavity 14 and a second cavity 15. The planetary reducer assembly 2, the first bearing seat 11, the second bearing seat 12 and the input transmission member 5 are all located in the first cavity 14, and the output transmission assembly 6 is located in the second cavity 15.

[0101] Among them, Figure 1-Figure 4 As shown, the transmission housing 1 further includes an annular planetary mount 13, which is coaxially arranged with the first bearing seat 11 and the second bearing seat 12. The planetary reducer assembly 2 further includes a planetary holder 22, which is connected to the planetary mount 13. The planetary mount 13 is also disposed in the first cavity 14.

[0102] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, a first oil injection hole and a second oil injection hole connected to the oil pump 9 are formed in the transmission housing 1, the first oil injection hole is connected to the first cavity 14, and the second oil injection hole is connected to the second cavity 15. A return oil hole 17 is provided on the partition 16. The transmission housing 1 is configured to allow the oil in the first cavity 14 to flow to the second cavity 15 through the return oil hole 17 under the action of gravity.

[0103] It can be understood that under the action of the oil pump 9, the oil at the bottom of the second cavity 15 reaches the first oil injection hole and the second oil injection hole through the oil pipeline 18 in the transmission housing 1, thereby realizing oil spraying on the structures in the first cavity 14 and the second cavity 15. The oil in the first cavity 14 flows from the return oil hole 17 through the inner wall of the transmission housing 1 to the bottom of the second cavity 15, and the oil in the second cavity 15 flows to the bottom of the second cavity 15 through the inner wall of the transmission housing 1.

[0104] Because the oil is located at the bottom of the second cavity 15, the structures within the first cavity 14 are prevented from coming into contact with a large amount of oil. This also reduces the amount of oil that contacts the structures within the second cavity 15, thereby reducing oil churning losses during operation of the transmission assembly 10. Furthermore, the oil pipeline 18, the first oil injection hole, and the second oil injection hole are directly formed within the transmission housing 1, thereby reducing the number of oil delivery pipes and simplifying the structure. Furthermore, during oil return, the inner wall of the transmission housing 1 also forms a flow channel for the oil, further reducing the number of oil delivery pipes and simplifying the structure.

[0105] Furthermore, if Figure 4 and Figure 5 As shown, the first direction is the horizontal direction, and the first cavity 14 and the second cavity 15 are arranged in a direction perpendicular to the first direction and the up and down direction. Through the reasonable arrangement of the transmission assembly 10, the oil can be deposited at the bottom of the second cavity 15 under the action of gravity, and the oil pump 9 is arranged in the second cavity 15. By providing flow power for the oil at the bottom of the second cavity 15, the oil can circulate better in the transmission housing 1.

[0106] Furthermore, the first oil injection holes are multiple and spaced apart in the horizontal direction and are arranged at the upper part of the first cavity 14 , so that the oil injection can cover more areas of the first cavity 14 and better ensure the operation of the transmission assembly 10 .

[0107] Furthermore, the second oil injection holes are multiple and spaced apart in the horizontal direction and are arranged in the upper part of the second cavity 15, so that the oil injection can cover more areas of the second cavity 15 and better ensure the operation of the transmission assembly 10.

[0108] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the highest height of the oil at the bottom of the second cavity 15 (eg Figure 5 The oil level s shown is lower than the lowest position of the output transmission assembly 6. Thus, the output transmission assembly 6 can be prevented from contacting the oil at the bottom of the second cavity 15, thereby further reducing the oil churning loss of the transmission assembly 10 during operation.

[0109] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the oil return hole 17 is located at the bottom of the first cavity 14. A one-way valve is installed in the oil return hole 17 to control the one-way flow of oil from the first cavity 14 to the second cavity 15. This prevents oil from flowing directly from the second cavity 15 into the first cavity 14, further ensuring dry and wet separation, thereby further preventing the structures in the first cavity 14 from contacting large amounts of oil, and further reducing oil churning losses.

[0110] In some embodiments of the present invention, the oil return hole 17 is located at the bottom of the first cavity 14, with the lowest point of the first cavity 14 being higher than the highest oil level at the bottom of the second cavity 15. This ensures that the oil enters the second cavity 15 and prevents oil accumulation at the bottom of the first cavity 14. This further ensures dry-wet separation, further preventing structures within the first cavity 14 from contacting large amounts of oil, and further reducing churning losses.

[0111] In some embodiments of the present invention, Figure 5-Figure 6 As shown, transmission assembly 10 also includes a filter 7, the inlet of which is connected to the outlet of oil pump 9. Filter 7 is positioned at the bottom of second cavity 15, shortening the distance between filter 7 and oil pump 9 and improving oil circulation efficiency. The presence of filter 7 improves oil quality, removes impurities from the oil, prevents damage to transmission assembly 10, and increases its service life.

[0112] In some embodiments of the present invention, Figure 5-Figure 6 As shown, the filter 7 includes a coarse filter 71 and a fine filter 72 connected in series. The coarse filter 71 is connected to the side of the fine filter 72 facing the inlet of the oil pump 9. Thus, through the two filtration steps, the oil quality is further improved, impurities in the oil are removed, damage to the transmission assembly 10 is avoided, and the service life is extended.

[0113] In some embodiments of the present invention, Figure 5-Figure 6 As shown, the transmission assembly 10 also includes an oil cooler 8, which is connected to the filter 7 and located on the side of the filter 7 facing away from the oil pump 9 along the oil flow direction. It will be appreciated that the provision of the oil cooler 8 cools the oil, thereby cooling the internal components of the transmission assembly 10 and ensuring proper operation of the transmission assembly 10. The oil cooler 8 can be positioned at the top, allowing the oil to quickly reach the top of the first and second cavities 14, 15, improving oil delivery and circulation efficiency.

[0114] Furthermore, if Figure 6 and Figure 7 As shown, the oil pipeline 18 includes a first pipeline 181 (wherein the first pipeline 181 can be formed as an oil pipe or as a hole on the transmission housing 1), the oil pipeline 18 includes the first pipeline 181, the first pipeline 181 is used to connect the fine filter 72 and the coarse filter 71, and the first pipeline 181 extends in the horizontal direction (the first direction and the direction perpendicular to the first direction and the up and down directions).

[0115] Furthermore, if Figure 6 and Figure 7As shown, the oil pipeline 18 includes a second pipeline 182 extending in the up-down direction (wherein the second pipeline 182 can be formed as an oil pipe or as a hole on the transmission housing 1 ), and the second pipeline 182 is used to connect the fine filter 72 and the oil cooler 8 .

[0116] Furthermore, if Figure 1 、 Figure 6-Figure 7 As shown, the oil pipeline 18 includes three third pipelines 183 (wherein the third pipeline 183 can be formed as an oil pipe or as a hole on the transmission housing 1), one end of the three third pipelines 183 is connected to the oil cooler 8, and the three third pipelines 183 are arranged in a direction perpendicular to the first direction and the up and down directions, and are respectively located in the motor assembly 30, the first cavity 14 and the second cavity 15, each third pipeline 183 extends along the first direction to one end where the oil pump 9 is located, and each third pipeline 183 has a plurality of nozzles spaced apart along the first direction, which are respectively used to spray oil into the motor assembly 30, the first cavity 14 and the second cavity 15.

[0117] In some embodiments of the present invention, the inner wall surface of the first cavity 14 is an arc surface, thereby facilitating the flow of oil on the inner wall surface of the first cavity 14 and improving the flow efficiency;

[0118] In some embodiments of the present invention, the inner wall surface of the second cavity 15 is an arc surface, thereby facilitating the flow of oil on the inner wall surface of the second cavity 15 and improving flow efficiency.

[0119] Reference below Figure 1 A drive axle 100 according to an embodiment of the present invention will be described.

[0120] like Figure 1 As shown, the drive axle 100 according to an embodiment of the present invention includes: the above-mentioned transmission assembly 10, two half-shafts 20 and a motor assembly 30. The two half-shafts 20 extend along the first direction and are arranged at intervals along the first direction. The facing ends of the two half-shafts 20 extend into the transmission housing 1 and are respectively connected to the planetary reducer assembly 2; the motor assembly 30 includes a motor, which is connected to the input transmission member 5.

[0121] It is understood that the two half-shafts 20 are connected to the differential 27 in the planetary reducer assembly 2. The drive axle 100 also includes two hub assemblies 40 arranged along a first direction. The two half-shafts 20 transmit power to the two hub assemblies 40 respectively. The drive axle 100 also includes two brake assemblies 50, which are used to input braking power to the hub assemblies 40.

[0122] According to the drive axle 100 of the embodiment of the present invention, by setting the above-mentioned transmission assembly 10, the axes of the first bearing seat 11 and the second bearing seat 12 coincide; the first bearing 3 is arranged on the first bearing seat 11, the second bearing 4 is arranged on the second bearing seat 12, the planetary reducer assembly 2 is arranged in the transmission housing 1, the planetary reducer assembly 2 includes a ring gear 21, and the ring gear 21 is rotatably supported on the first bearing 3; the input transmission member 5 is arranged in the transmission housing 1, and the input transmission member 5 is rotatably supported on the second bearing 4, so that the first bearing seat 11, the second bearing seat 12 and the transmission housing 1 are designed to be co-shelled, thereby improving the coaxiality of the axes between the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5, and improving the structural stiffness of the transmission housing 1, and also improving the support reliability of the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5, thereby improving the NVH performance.

[0123] In some embodiments of the present invention, Figure 1-Figure 7 As shown, the motor assembly 30 further includes a motor housing, which is integrated with the transmission housing 1 , thereby further improving the structural rigidity of the transmission housing 1 .

[0124] Next, a vehicle according to an embodiment of the present invention will be described.

[0125] A vehicle according to an embodiment of the present invention includes the aforementioned drive axle 100 .

[0126] According to the vehicle of the embodiment of the present invention, by setting the above-mentioned drive axle 100 and the above-mentioned transmission assembly 10, the axes of the first bearing seat 11 and the second bearing seat 12 coincide with each other; the first bearing 3 is arranged on the first bearing seat 11, the second bearing 4 is arranged on the second bearing seat 12, the planetary reducer assembly 2 is arranged in the transmission housing 1, the planetary reducer assembly 2 includes a ring gear 21, and the ring gear 21 is rotatably supported on the first bearing 3; the input transmission member 5 is arranged in the transmission housing 1, and the input transmission member 5 is rotatably supported on the second bearing 4, so that the first bearing seat 11, the second bearing seat 12 and the transmission housing 1 are designed to be co-shelled, thereby improving the coaxiality of the axes between the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5, and improving the structural stiffness of the transmission housing 1, and also improving the support reliability of the rotating bodies such as the first bearing 3, the second bearing 4, the planetary reducer assembly 2 and the input transmission member 5, thereby improving the NVH performance. Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses 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 any one or more embodiments or examples.

[0127] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A transmission assembly, characterized in that: include: a transmission housing, the transmission housing having a first bearing seat and a second bearing seat spaced apart in a first direction, the axes of the first bearing seat and the second bearing seat coinciding, the transmission housing further having an annular planetary mount, the planetary mount being coaxially arranged with the first bearing seat and the second bearing seat, and the planetary mount being disposed between the first bearing seat and the second bearing seat in the first direction; a first bearing, the first bearing being disposed on the first bearing seat; a second bearing, the second bearing being disposed in the second bearing seat, the number of the second bearing seats being two, the two second bearing seats being spaced apart in the first direction, the number of the second bearings being two, and corresponding one-to-one to the two second bearing seats; a planetary reducer assembly, the planetary reducer assembly being disposed in the transmission housing, the planetary reducer assembly comprising a ring gear rotatably supported on the first bearing, and the planetary reducer assembly further comprising a planetary retainer connected to the planetary mounting seat; An input transmission member is provided in the transmission housing, the input transmission member is rotatably supported on the second bearing, the planetary reducer assembly is in transmission connection with the input transmission member, and the two ends of the input transmission member in the first direction are respectively supported on two second bearings.

2. The transmission assembly according to claim 1, characterized in that: The planetary reducer assembly also includes: a sun gear connected to the input transmission member; a planetary fixing frame, the planetary fixing frame being fixed relatively to the transmission housing; a planet carrier rotatably mounted on the planet fixing frame; Multiple planetary gears are rotatably disposed on the planetary carrier, the multiple planetary gears are arranged radially outside the sun gear and meshed with the sun gear, and the gear ring is disposed outside the multiple planetary gears and meshed with the multiple planetary gears.

3. The transmission assembly according to claim 2, characterized in that: The planetary reducer assembly also includes: a shift assembly, which is fixed to the planetary carrier. The shift assembly has a first state and a second state. In the first state, the shift assembly is relatively fixed to the planetary carrier. In the second state, the shift assembly is separated from the planetary carrier.

4. The transmission assembly according to claim 3, characterized in that: The planetary fixed frame has a first limiting member, and the shift assembly includes: a fixing member and a shifting member, the fixing member is fixed to the planetary frame, and the shifting member is movable between a first position and a second position relative to the fixing member. In the first position, the shift member is connected to the first limiting member, and the shift assembly is switched to the first state; in the second position, the shift member is separated from the first limiting member, and the shift assembly is switched to the second state.

5. The transmission assembly according to claim 4, characterized in that: The planetary carrier includes a bracket portion and a first shaft portion, the planetary gear is provided on the bracket portion, the first shaft portion is connected to the bracket portion and extends along the first direction, The fixing member extends in a ring shape along the circumference of the first shaft portion and is sleeved and fixed on the outer side of the first shaft portion.

6. The transmission assembly according to claim 4, characterized in that: The planetary fixing frame and the shift assembly are arranged in the first direction, and the shift member is movably provided on the fixing member between the first position and the second position along the first direction.

7. The transmission assembly according to claim 6, characterized in that: The fixing member and the shifting member are both annular, and the shifting member is sleeved on the outside of the fixing member. A first limiting protrusion is provided on the inner peripheral wall of the shifting member, and a first limiting groove extending along the first direction is provided on the outer peripheral wall of the fixing member. The first limiting protrusion is matched with the first limiting groove and can slide relative to the first limiting groove along the first direction.

8. The transmission assembly according to claim 7, characterized in that: A second limiting groove extending along the first direction is provided on the outer peripheral wall of the first limiting member. When the stop member is in the first position, a portion of the first limiting protrusion fits in the second limiting groove, and the other portion fits in the first limiting groove.

9. The transmission assembly according to claim 1, characterized in that: Also includes: An output transmission assembly, one end of which is transmission-connected to the input transmission member, and the other end of which is suitable for transmission-connected to the motor.

10. The transmission assembly according to claim 9, characterized in that: The output transmission assembly is a gear transmission assembly, the input transmission member is a gear member, and the output transmission assembly includes: A first gear, a second gear and a third gear, wherein the first gear is adapted to be connected to the motor shaft of the motor in a transmission manner, the second gear and the third gear are coaxially fixed, the second gear is meshed with the first gear, and the third gear is meshed with the input transmission member.

11. The transmission assembly according to claim 9, characterized in that: The transmission housing is provided with a partition to divide the space inside the transmission housing into a first cavity and a second cavity. The planetary reducer assembly, the first bearing seat, the second bearing seat and the input transmission member are all located in the first cavity, and the output transmission assembly is arranged in the second cavity.

12. The transmission assembly according to claim 11, characterized in that: The transmission housing is formed with a first oil injection hole and a second oil injection hole connected to the oil pump, the first oil injection hole is connected to the first cavity, and the second oil injection hole is connected to the second cavity. The partition plate is provided with an oil return hole, and the transmission housing is configured to allow the oil in the first cavity to flow to the second cavity through the oil return hole under the action of gravity.

13. The transmission assembly according to claim 12, characterized in that: The highest height of the oil at the bottom of the second cavity is lower than the lowest position of the output transmission assembly.

14. The transmission assembly according to claim 12, wherein: The oil return hole is located at the bottom of the first cavity. A one-way valve is provided in the oil return hole for controlling the one-way flow of oil from the first cavity to the second cavity.

15. The transmission assembly according to claim 12, wherein: The oil return hole is located at the bottom of the first cavity, and the lowest point of the first cavity is higher than the highest height of the oil at the bottom of the second cavity.

16. The transmission assembly according to claim 12, wherein: Also includes: A filter is provided, wherein an inlet of the filter is communicated with an outlet of the oil pump.

17. The transmission assembly according to claim 16, characterized in that: The filter comprises a coarse filter and a fine filter which are connected in series in sequence, and the coarse filter is connected to a side of the fine filter which faces the oil pump inlet.

18. The transmission assembly according to claim 16, wherein: Also includes: An oil cooler is communicated with the filter and is located on a side of the filter away from the oil pump along the oil flow direction.

19. The transmission assembly according to claim 12, wherein: The inner wall surface of the first cavity is an arc surface; And / or, the inner wall surface of the second cavity is an arc surface.

20. A drive axle, characterized in that: include: The transmission assembly according to any one of claims 1 to 19; Two half-shafts, the two half-shafts extending along the first direction and spaced apart along the first direction, the facing ends of the two half-shafts both extending into the transmission housing and respectively connected to the planetary reducer assembly; The motor assembly includes a motor, and the motor is in driving connection with the input transmission member.

21. The drive axle according to claim 20, characterized in that: The motor assembly further includes a motor housing, and the motor housing and the transmission housing are an integrated part.

22. A vehicle, characterized in that: Comprising a drive axle according to claim 20 or 21.

Images