Power driving system and vehicle

Abstract

The utility model discloses a power drive system and a vehicle, the power drive system comprises: a power assembly, the power assembly comprises a motor housing, a connecting support and a differential mechanism, the differential mechanism is installed on the motor housing, the connecting support and the motor housing are integrated; one end of the driving shaft assembly extends into the differential mechanism so as to be in circumferential transmission fit with a half axle gear in the differential mechanism, and the driving shaft assembly is arranged on the connecting support in a penetrating mode and rotatably supported on the connecting support through a first bearing. According to the power driving system, the compact, light and high-performance structural design of the power driving system can be achieved, the assembly precision is improved, the cost is reduced, and the disassembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a power drive system and a vehicle with the power drive system. Background Art

[0002] During the assembly process of the existing powertrain differential and drive shaft, the assembly process is complicated, the accuracy of the differential axis and the drive shaft axis is difficult to ensure, and the cumulative tolerance size is too large, which in turn affects the performance of the entire vehicle. In addition, the bracket size is too large and heavy, and there are many assembled parts, which makes disassembly inconvenient and the cost increased. There is still room for improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a power drive system, which can achieve a compact, lightweight, high-performance structural design, improve assembly accuracy, reduce costs, and improve disassembly efficiency.

[0004] According to the power drive system of the embodiment of the utility model, it includes: a power assembly, which includes a motor housing, a connecting bracket and a differential, the differential is installed on the motor housing, and the connecting bracket is integrated with the motor housing; a drive shaft assembly, one end of the drive shaft assembly extends into the differential to cooperate with the circumferential transmission of the half-shaft gear in the differential, and the drive shaft assembly is passed through the connecting bracket and is rotatably supported on the connecting bracket through a first bearing.

[0005] According to the power drive system of the embodiment of the utility model, the connecting bracket and the motor housing are integrated, and the drive shaft assembly is passed through the connecting bracket and is rotatably supported on the connecting bracket by the first bearing. There is no need to assemble the intermediate bracket separately, thereby improving the assembly accuracy, improving the coaxiality accuracy of the drive shaft assembly and the differential, solving the problem of early failure of the oil seal eccentricity and bearing caused by the non-concentricity of the drive shaft assembly and the differential axis, and reducing the assembly process of the intermediate bracket and the motor housing, so as to achieve a compact, lightweight and high-performance structural design of the power drive system, solve the problems of long disassembly and assembly time and insufficient tool space during the assembly process, reduce the number of assembled components and the influence of the cumulative tolerance of multi-stage component assembly on the closed loop, reduce costs, and improve disassembly efficiency.

[0006] According to the power drive system of some embodiments of the present invention, the power drive system further includes a dustproof structure, which is located at the end of the first bearing and is used to shield the first bearing in the axial direction.

[0007] According to the power drive system of some embodiments of the present utility model, the dustproof structure is constructed as a dustproof boss, the dustproof boss is arranged on the inner peripheral wall of the connecting bracket, and the dustproof boss protrudes inwardly along the radial direction of the connecting bracket.

[0008] According to the power drive system of some embodiments of the present invention, the dustproof structure is constructed as a dustproof cover, and the dustproof cover is sleeved outside the drive shaft assembly and is axially opposite to the first bearing.

[0009] According to the power drive system of some embodiments of the utility model, the dustproof structure includes a dustproof boss and a dustproof cover, the dustproof boss is arranged on the inner circumferential wall of the connecting bracket and is located at the first end of the first bearing, and the dustproof cover is arranged outside the drive shaft assembly and is located at the second end of the first bearing.

[0010] According to the power drive system of some embodiments of the utility model, the first bearing includes a bearing inner ring and a bearing outer ring, the bearing inner ring is interference fit with the outer circumferential wall of the drive shaft assembly, and the bearing outer ring is transition fit with the inner circumferential wall of the connecting bracket.

[0011] According to the power drive system of some embodiments of the utility model, one end of the drive shaft assembly is matched with the half-shaft gear through a spline circumferential transmission, and an axial limiter is provided between the drive shaft assembly and the half-shaft gear.

[0012] According to the power drive system of some embodiments of the utility model, the axial limiting member is constructed as a limiting retaining spring, which is sleeved on the outside of the drive shaft assembly, and the inner peripheral portion of the limiting retaining spring is axially limited by the drive shaft assembly and the outer peripheral portion is axially limited by the half-shaft gear.

[0013] According to the power drive system of some embodiments of the utility model, the differential is provided with a penetration opening, one end of the drive shaft assembly is suitable for passing through the penetration opening, and an oil seal is provided at the penetration opening, and the oil seal elastically presses against the outer peripheral wall of the drive shaft assembly.

[0014] The utility model also provides a vehicle.

[0015] A vehicle according to an embodiment of the present utility model comprises any one of the power drive systems described above.

[0016] The advantages of the vehicle and the above-mentioned power drive system over the prior art are the same and will not be described in detail here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a power drive system according to an embodiment of the utility model;

[0020] Figure 2 is a cross-sectional view of a power drive system according to an embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the connection between the limit clamp spring and the drive shaft assembly according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] Power drive system 100,

[0024] Power assembly 1, motor housing 11, connecting bracket 12, differential 13, half-shaft gear 131, penetration opening 132, oil seal 133,

[0025] Drive shaft assembly 2, first bearing 3, dustproof structure 4, dustproof boss 41, dustproof cover 42, dustproof cover 43, limit retaining spring 5, inner ball cage long handle sliding sleeve 6. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present utility model, it is necessary to understand 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Unless otherwise specified, the front-to-back direction in the present application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0030] Reference below Figure 1-Figure 3 The power drive system 100 according to the embodiment of the utility model is described. The power drive system 100 can achieve a compact, lightweight, high-performance structural design, improve assembly accuracy, reduce costs, and improve disassembly efficiency.

[0031] like Figure 1-Figure 3 As shown, the power drive system 100 according to the embodiment of the utility model includes: a power assembly 1 and a drive shaft assembly 2.

[0032] The power assembly 1 includes a motor housing 11 , a connecting bracket 12 and a differential 13 . The differential 13 is mounted on the motor housing 11 , and the connecting bracket 12 is integrated with the motor housing 11 .

[0033] Specifically, a mounting cavity is formed in the motor housing 11 for mounting the motor. The motor can provide kinetic energy and then transmit it to the drive shaft assembly 2 to drive the wheels to rotate. The motor housing 11 can protect the motor inside to prevent it from being damaged and affecting its operation. Among them, the power assembly 1 also includes a differential housing, which is connected to the motor housing 11 as a whole. The differential 13 can transmit the power differential of the motor to the two wheels, so that the wheels on both sides rotate at different speeds. The differential 13 is installed in the differential housing, and the differential housing is connected to the inside of the motor housing 11, so that the kinetic energy of the motor can be transmitted to the differential 13.

[0034] The connecting bracket 12 is used to fix and connect the drive shaft assembly 2, wherein the connecting bracket 12 and the drive shaft assembly 2 are integrated, that is, they are not separately arranged, and the connecting bracket 12 and the drive shaft assembly 2 are designed as a whole, eliminating the assembly process of the connecting bracket 12 and the motor housing 11, and fixing the installation position of the connecting bracket 12, which can avoid inaccurate positioning of the connecting bracket 12, thereby causing inaccurate positioning of the drive shaft assembly 2, ensuring the coaxiality accuracy of the axis of the drive shaft assembly 2 and the axis of the differential 13, and realizing the compact design and lightweight structural design of the power drive system 100, solving the problems of long disassembly and assembly time and insufficient tool space during assembly, reducing the number of assembled components and the influence of the cumulative tolerance of multi-stage component assembly on the dimensional closed loop, and reducing costs.

[0035] Therefore, the integrated setting of the connecting bracket 12 and the motor housing 11 integrates the intermediate support mounting point of the drive shaft assembly 2 into the motor housing 11, that is, no other separately assembled brackets are required, thereby achieving a lightweight, compact, and low-cost structural design, and solving the problem of complicated assembly process caused by the separate connection of the connecting bracket 12 and the motor housing 11 in the traditional power drive system 100. There is no need to separately set the distance between the connecting bracket 12 and the mounting point of the motor housing 11. If the distance is too small, insufficient connection strength will result, resulting in the problem of large size and heavy weight of the separate bracket.

[0036] Furthermore, one end of the drive shaft assembly 2 extends into the differential 13 to cooperate with the half-shaft gear 131 in the differential 13 in circumferential transmission. The drive shaft assembly 2 is inserted into the connecting bracket 12 and is rotatably supported on the connecting bracket 12 through the first bearing 3.

[0037] That is to say, the drive shaft assembly 2 can transmit power to the half-shaft gear 131, that is, when the half-shaft gear 131 rotates, it can drive the drive shaft assembly 2 to rotate, so that the half-shaft gear 131 of the differential 13 can withstand the torque input by the motor and transmit the torque to the drive shaft assembly 2, and then to the wheels, so that the vehicle has a differential function when turning, that is, the wheels rotate at different speeds, wherein the shape of the connecting bracket 12 is adapted to the outer peripheral shape of the drive shaft assembly 2, so that the drive shaft assembly 2 can be inserted into the connecting bracket 12, so that the connecting bracket 12 is fixedly supported. The drive shaft assembly 2 makes the drive shaft assembly 2 coaxial with the differential 13, ensuring the coaxial accuracy of the two, thereby reducing the cumulative tolerance of the assembly with the motor housing 11, avoiding the excessive eccentricity of the drive shaft assembly 2 and causing early failure of the oil seal due to eccentric wear, and the outer periphery of the drive shaft assembly 2 is also sleeved with a first bearing 3, which can be rotatably supported on the connecting bracket 12 by the first bearing 3, so as to realize the precise transmission of the drive shaft assembly 2, reduce the friction between the drive shaft assembly 2 and the connecting bracket 12, and support the first bearing 3 by the connecting bracket 12, which can also increase the service life of the first bearing 3.

[0038] It should be noted that the left and right ends of the differential 13 are both equipped with drive shaft assemblies 2, and the coaxiality accuracy of the left and right drive shaft assemblies 2 and the differential 13 must be ensured, as shown in the attached Figure 1 As shown, in this embodiment, it refers to the drive shaft assembly 2 at the right end.

[0039] According to the power drive system 100 of the embodiment of the utility model, the connecting bracket 12 is integrated with the motor housing 11, and the drive shaft assembly 2 is inserted into the connecting bracket 12 and rotatably supported on the connecting bracket 12 by the first bearing 3. There is no need to assemble the connecting bracket 12 separately, thereby improving the assembly accuracy, improving the coaxiality accuracy of the drive shaft assembly 2 and the differential 13, solving the problem of early failure of the oil seal eccentricity and bearings caused by the non-concentricity of the drive shaft assembly 2 and the differential 13 axis, and reducing the assembly process of the connecting bracket 12 and the motor housing 11, so as to realize the compact, lightweight and high-performance structural design of the power drive system 100, solve the problems of long disassembly and assembly time and insufficient tool space during the assembly process, reduce the number of assembled components and the influence of the cumulative tolerance of multi-stage component assembly on the closed loop, reduce the cost, and improve the disassembly efficiency.

[0040] In some embodiments, the power drive system 100 also includes a dustproof structure 4, which is used to seal the drive shaft assembly 2. The dustproof structure 4 is located at the end of the first bearing 3 and is used to shield the first bearing 3 in the axial direction, thereby achieving sealing of the end of the first bearing 3 and preventing foreign matter such as dust from entering the interior of the bearing and affecting the operation of the first bearing 3.

[0041] Specifically, after the first bearing 3 is installed in the connecting bracket 12, the dustproof structure 4 can be axially installed at the left and right ends of the connecting bracket 12 and the first bearing 3 to block the first bearing 3 in the axial direction, thereby sealing the first bearing 3 and preventing foreign matter such as dust from entering the bearing. At the same time, the first bearing 3 can be limited to prevent the first bearing 3 from axial movement and displacement.

[0042] In some embodiments, the dustproof structure 4 is constructed as a dustproof boss 41 , which is disposed on the inner peripheral wall of the connecting bracket 12 , and the dustproof boss 41 protrudes inwardly along the radial direction of the connecting bracket 12 .

[0043] like Figure 2As shown, the dustproof structure 4 is constructed as a dustproof boss 41, and the dustproof boss 41 is formed on the connecting bracket 12, and radially protrudes inward at the left and right ends on the inner circumferential wall of the connecting bracket 12 to extend a certain distance to form the dustproof boss 41. After the connecting bracket 12 is sleeved on the outer periphery of the first bearing 3, the left and right ends of the first bearing 3 are respectively abutted against the inner circumferential wall of the connecting bracket 12 in the radial direction, and the outer periphery is axially abutted against the inner circumferential wall of the dustproof boss 41 of the connecting bracket 12, thereby, the first bearing 3 is completely enclosed in the connecting bracket 12, which can prevent dust and other foreign objects from entering the first bearing 3, and the dustproof boss 41 can limit the first bearing 3 to prevent the first bearing 3 from axial movement and deviation on the drive shaft.

[0044] In some embodiments, the dustproof structure 4 is configured as a dustproof cover 42 . The dustproof cover 42 is sleeved outside the drive shaft assembly 2 and is axially opposite to the first bearing 3 .

[0045] That is to say, after the connecting bracket 12 is sleeved on the outside of the first bearing 3, the dust cover 42 can be sleeved on the outside of the drive shaft assembly 2, and the dust cover 42 and the first bearing 3 are axially opposite, so that the dust cover 42 can cover the end of the first bearing 3. In actual design, two dust covers 42 can be set to respectively block and seal the left and right ends of the first bearing 3 to prevent dust and other foreign objects from entering the bearing from the ends and affecting the operation of the first bearing 3.

[0046] In some embodiments, the dustproof structure 4 includes a dustproof boss 41 and a dustproof cover 42. The dustproof boss 41 is arranged on the inner circumferential wall of the connecting bracket 12 and is located at the first end of the first bearing 3. The dustproof cover 42 is sleeved on the outside of the drive shaft assembly 2 and is located at the second end of the first bearing 3. That is, the dustproof boss 41 and the dustproof cover 42 are respectively located at both ends of the first bearing 3 to shield and seal the first bearing 3 to prevent dust and other foreign objects from entering the bearing from the end.

[0047] Specifically, Figure 2 As shown in the left-right direction, the left end of the inner circumferential wall of the connecting bracket 12 radially protrudes inward and extends a certain distance to form a dust-proof boss 41, that is, the dust-proof boss 41 is located at the left end of the first bearing 3, and the inner circumferential wall of the dust-proof boss 41 abuts against the left end of the first bearing 3, shielding and sealing the left end of the first bearing 3, and limiting the first bearing 3 from deviating to the left. At the same time, the dust cover 42 is sleeved on the outer periphery of the drive shaft assembly 2, located at the right end of the first bearing 3, shielding and sealing the right end of the first bearing 3, and limiting the first bearing 3 from deviating to the right, thereby achieving the sealing of the first bearing 3. It should be noted that the installation position and specific use of the dust-proof structure 4 are not limited to those shown in this embodiment and the drawings, and can be flexibly adjusted according to actual conditions.

[0048] In actual design, Figure 2 As shown, the dustproof structure 4 may also include a dust cover 43, which may be arranged at the end of the inner ball cage long handle sliding sleeve 6. Since there is grease in the inner ball cage long handle sliding sleeve 6, the dust cover 43 may seal it to prevent the grease from flowing out. At the same time, the dust cover 43 may be retracted to meet the size requirements of the inner and outer ball cages during the movement and retraction process, that is, to meet the normal operation of the inner and outer ball cages. In order to make the inner ball cage long handle sliding sleeve 6 and the dust cover 43 tightly connected, a large clamp may be arranged at the left end of the dust cover 43, and a small clamp may be arranged at the right end to fasten the dust cover 43 and the drive shaft assembly 2. Among them, a second bearing may be arranged outside the inner ball cage long handle sliding sleeve 6 to support it, and the bearing inner ring of the second bearing and the ball cage long handle sliding sleeve may be designed as an interference fit, and the bearing outer ring of the second bearing and the inner wall of the connecting bracket 12 may be designed as a transition fit.

[0049] In some embodiments, the first bearing 3 includes a bearing inner ring and a bearing outer ring. The bearing inner ring has an interference fit with the outer circumferential wall of the drive shaft assembly 2 , and the bearing outer ring has a transition fit with the inner circumferential wall of the connecting bracket 12 .

[0050] Specifically, Figure 2 As shown, the inner ring of the bearing is sleeved on the outer circumferential wall of the drive shaft assembly 2 to determine the installation position of the first bearing 3 and cooperate with the drive shaft assembly 2 so that the two can rotate relative to each other, while bearing the radial load and axial load from the outside, as well as the inertia force generated during the rotation process, so as to reduce the friction loss of the first bearing 3, thereby improving the rotation efficiency of the first bearing 3. The inner ring of the bearing and the outer circumferential wall of the drive shaft assembly 2 are interference fit, which can achieve a close fit between the first bearing 3 and the drive shaft assembly 2 and transmit a large torque.

[0051] Among them, the size of the outer ring of the bearing is adapted to the size of the connecting bracket 12, so that the outer ring of the bearing can be installed inside the connecting bracket 12, and then the first bearing 3 can be rotatably supported on the connecting bracket 12, and it is a transition fit with the inner circumferential wall of the connecting bracket 12, which can realize the supporting effect of the connecting bracket 12 on the first bearing 3 and facilitate the disassembly of the two.

[0052] Therefore, by providing an interference fit between the inner ring of the bearing and the outer circumferential wall of the drive shaft assembly 2, and a transition fit between the outer ring of the bearing and the inner circumferential wall of the connecting bracket 12, the connecting bracket 12 can support the first bearing 3, while reducing the friction of the drive shaft assembly 2 during movement, and ensuring its rotation accuracy, thereby achieving precise transmission and transferring torque.

[0053] In some embodiments, one end of the drive shaft assembly 2 is matched with the side gear 131 through a spline circumferential transmission, and an axial stopper is provided between the drive shaft assembly 2 and the side gear 131. In other words, a spline can be provided on the side gear 131, and the spline can realize the circumferential transmission cooperation between the drive shaft assembly 2 and the side gear 131, so that the side gear 131 can transmit power to the drive shaft assembly 2, and the spline has a high load-bearing capacity. The drive shaft assembly 2 and the side gear 131 are connected by a spline, and a large torque can be transmitted to the drive shaft assembly 2, thereby improving the connection strength between the two. At the same time, the spline connection can prevent the drive shaft assembly 2 and the side gear 131 from rotating relative to each other, thereby realizing accurate power transmission and positioning. And an axial stopper is provided between the drive shaft assembly 2 and the side gear 131, which can prevent the drive shaft assembly 2 from being separated from the side gear 131 and the axial position from being offset, thereby realizing a tighter and more accurate connection between the drive shaft assembly 2 and the side gear 131.

[0054] like Figure 2 and Figure 3 As shown, an internal spline is provided on the inner periphery of the half-shaft gear 131, the half-shaft gear 131 is connected to the drive shaft assembly 2 via a spline, and an axial limiter is provided on the outer periphery of the drive shaft assembly 2, the axial limiter is sleeved on the outer shaft of the drive shaft assembly 2, and limits the drive shaft assembly 2 to prevent the drive shaft assembly 2 from axial displacement and movement during movement, causing the position of the drive shaft assembly 2 and the half-shaft gear 131 to change, thereby affecting power transmission.

[0055] In some embodiments, the axial limiting member is constructed as a limiting retaining spring 5, which is sleeved on the outside of the drive shaft assembly 2, and the inner peripheral portion of the limiting retaining spring 5 is axially limited by the drive shaft assembly 2 and the outer peripheral portion is axially limited by the half-shaft gear 131.

[0056] Specifically, Figure 3 As shown, the axial limit member is constructed as a limit retaining spring 5, and a corresponding retaining spring groove is provided on the inner spline of the half-shaft gear 131. The shape and size of the retaining spring groove are adapted to the shape and size of the limit retaining spring 5, so that the limit retaining spring 5 can be installed in the retaining spring groove. Thus, the limit retaining spring 5 is sleeved outside the drive shaft assembly 2 and installed in the half-shaft gear 131. At this time, the inner peripheral part of the limit retaining spring 5 is in contact with the outer periphery of the drive shaft assembly 2, and the two ends of the limit retaining spring 5 are in contact with the drive shaft assembly 2. The drive shaft assembly 2 can be offset against each other, and the axial displacement and movement of the drive shaft assembly 2 can be restricted, such as movement to the right, disengaging from the half-shaft gear 131, causing the differential 13 to separate from the drive shaft assembly 2, and the outer peripheral portion of the limiting retaining spring 5 is in contact with the inner periphery of the half-shaft gear 131, and the two end portions of the limiting retaining spring 5 are offset against the inner periphery of the half-shaft gear 131, which can axially limit the half-shaft gear 131 and prevent the half-shaft gear 131 from axial displacement and movement.

[0057] In addition, the limit spring 5 has good elasticity and restoring force. The limit spring 5 is used for axial limiting, which facilitates the disassembly and installation of the drive shaft assembly 2 and the half-shaft gear 131, thereby facilitating disassembly and maintenance and reducing time costs. In actual design, the left end of the limit spring 5 can be provided with a limit chamfer to further prevent the drive shaft assembly 2 from being separated from the half-shaft gear 131.

[0058] Therefore, by setting the limit spring 5, the relative position of the drive shaft assembly 2 and the half-shaft gear 131 can be fixed to prevent one of them from axially moving, prevent the drive shaft assembly 2 from being separated from the reducer, and ensure the connection reliability and disassembly feasibility of the drive shaft assembly 2 and the differential. The axial limiting structure of the limit spring 5 eliminates the traditional need for other axial fasteners or brackets for limiting and positioning, reduces the number of parts, and reduces the cumulative tolerance of the dimension chain (the number of component rings, shortened dimension length and tolerance value), that is, reduces the axial dimensional tolerance accumulation, so that the axial cumulative tolerance is only the axial tolerance accumulation of the limit spring 5 and the retaining spring groove, thereby improving the axial and radial dimensional accuracy of the power drive system 100, avoiding the risk of positioning interference caused by excessive tolerance accumulation, affecting the coaxiality of the drive shaft assembly 2 and the reducer, thereby reducing the design weight and cost of the system and achieving lightweight.

[0059] In some embodiments, the differential 13 is provided with a penetration opening 132 , one end of the drive shaft assembly 2 is suitable for passing through the penetration opening 132 , and an oil seal 133 is provided at the penetration opening 132 , and the oil seal 133 elastically presses against the outer peripheral wall of the drive shaft assembly 2 .

[0060] like Figure 1 As shown, the differential 13 is provided with a penetration opening 132, so that the left end of the drive shaft assembly 2 can penetrate into the interior of the differential 13 from the penetration opening 132 and connect with the half-shaft gear 131. An oil seal 133 is provided at the penetration opening 132. The oil seal 133 can be constructed in an annular shape and matched with the size of the penetration opening 132. With such a configuration, when the drive shaft assembly 2 is connected with the drive shaft assembly 2, the oil seal 133 can be elastically pressed against the outer peripheral wall of the drive shaft assembly 2 to seal the lubricating oil in the differential 13 and prevent it from flowing out from the penetration opening 132. In actual design, as shown in FIG. Figure 2 As shown, a sealing cover may be further provided at the end of the oil seal 133 to further seal the differential 13 and improve the sealing effect.

[0061] The utility model also provides a vehicle.

[0062] According to the vehicle of the embodiment of the utility model, a power drive system 100 of any of the above-mentioned embodiments is provided. Among them, by integrating the connection bracket 12 with the motor housing 11, and allowing the drive shaft assembly 2 to pass through the connection bracket 12 and be rotatably supported on the connection bracket 12 through the first bearing 3, there is no need to assemble the connection bracket 12 separately, thereby improving the assembly accuracy, improving the coaxiality accuracy of the drive shaft assembly 2 and the differential, solving the problem of early failure caused by the eccentricity of the oil seal and the bearing due to the non-concentricity of the drive shaft assembly 2 and the differential axis, and reducing the assembly process of the connection bracket 12 and the motor housing 11, so as to realize the compact, lightweight, and high-performance structural design of the power drive system 100, solve the problem of long disassembly and assembly time and insufficient tool space during the assembly process, reduce the number of assembled components and the impact of the cumulative tolerance of multi-level component assembly on the closed loop, reduce costs, and improve disassembly efficiency.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power drive system, characterized in that: include: A powertrain, the powertrain comprising a motor housing, a connecting bracket and a differential, the differential being mounted on the motor housing, and the connecting bracket being integrated with the motor housing; A drive shaft assembly, one end of which extends into the differential to cooperate with the half-shaft gear in the differential in circumferential transmission. The drive shaft assembly is passed through the connecting bracket and is rotatably supported on the connecting bracket through a first bearing.

2. The power drive system according to claim 1, characterized in that: It also includes a dustproof structure, which is located at the end of the first bearing and is used to shield the first bearing in the axial direction.

3. The power drive system according to claim 2, characterized in that: The dustproof structure is constructed as a dustproof boss, which is arranged on the inner peripheral wall of the connecting bracket and protrudes inwardly along the radial direction of the connecting bracket.

4. The power drive system according to claim 2, characterized in that: The dustproof structure is constructed as a dustproof cover, which is sleeved outside the drive shaft assembly and directly faces the first bearing along the axial direction.

5. The power drive system according to claim 2, characterized in that: The dustproof structure includes a dustproof boss and a dustproof cover. The dustproof boss is arranged on the inner circumferential wall of the connecting bracket and is located at the first end of the first bearing. The dustproof cover is sleeved outside the driving shaft assembly and is located at the second end of the first bearing.

6. The power drive system according to claim 1, characterized in that: The first bearing comprises a bearing inner ring and a bearing outer ring. The bearing inner ring is interference fit with the outer peripheral wall of the drive shaft assembly, and the bearing outer ring is transition fit with the inner peripheral wall of the connecting bracket.

7. The power drive system according to any one of claims 1 to 6, characterized in that: One end of the drive shaft assembly is matched with the half-shaft gear through a spline circumferential transmission, and an axial limiter is provided between the drive shaft assembly and the half-shaft gear.

8. The power drive system according to claim 7, characterized in that: The axial limiting member is configured as a limiting retaining spring, which is sleeved outside the driving shaft assembly. The inner peripheral portion of the limiting retaining spring is axially limited by the driving shaft assembly, and the outer peripheral portion is axially limited by the half-shaft gear.

9. The power drive system according to any one of claims 1 to 6, characterized in that: The differential is provided with a penetration opening, one end of the drive shaft assembly is suitable for passing through the penetration opening, and an oil seal is provided at the penetration opening, and the oil seal elastically presses against the outer peripheral wall of the drive shaft assembly.

10. A vehicle, characterized in that: A power drive system according to any one of claims 1 to 9 is provided.

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