Electric drive axle assembly structure and vehicle

Abstract

The utility model discloses an electric drive axle assembly structure and a vehicle, and relates to the technical field of vehicle power systems.The electric drive axle assembly structure comprises a motor shell body, a speed reducer shell and an axle shell, and one end of the motor shell body in the first direction is open; the speed reducer shell comprises a first shell body and a second shell body, the first shell body covers the open end of the motor shell body, the second shell body is located on the side, back to the motor shell body, of the first shell body, and the spliced side portions of the first shell body and the second shell body are correspondingly provided with a first notch and a second notch which are arranged in a spliced mode. A mounting opening is formed in one side of the speed reducer shell; the axle housing is located on one side of the speed reducer housing and provided with a matching opening which is connected with the mounting opening in a sleeved mode and matched with the mounting opening in a sealed mode, the mounting opening can be limited in the matching opening, and the situation that when the speed reducer housing and the axle housing are sealed, the first housing and the second housing move, and consequently sealing among a plurality of housings is difficult is avoided. Therefore, the spliced speed reducer shell can be well sealed with the axle housing.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle power systems, in particular to an electric drive axle assembly structure and a vehicle. Background Art

[0002] The electric drive axle is a key component used in new energy vehicles such as electric vehicles (EVs) and hybrid electric vehicles (HEVs). It integrates the functions of an electric motor, a speed reducer, and a differential. It is typically installed on the front or rear axle of a vehicle to directly drive the wheels.

[0003] In the related art, the motor and the reducer are independent entities, which are first assembled independently and then assembled together. The power shaft of the motor and the input shaft of the reducer are transmitted from the motor to the reducer through a spline structure; the 2-in-1 whole after assembly is then assembled with the bridge body to form an electric drive axle. Because an adapter plate is required between the motor and the reducer for assembly, the adapter plate is redundant. Utility Model Content

[0004] In response to the above-mentioned technical problems, the present utility model considers eliminating the end cover at one end of the motor, using the end cover at one end of the reducer as the end cover of the motor, and splicing the motor and reducer housings together. In order to facilitate the installation of the motor, the reducer housing is spliced ​​together by two end covers. After the motor is installed, one end cover of the reducer is spliced ​​together with the motor housing. After the reducer is installed, the other end cover of the reducer is spliced ​​together with the front end cover. Therefore, the reducer housing is spliced ​​together by two sub-housings, and then assembled and sealed with the bridge housing to prevent external water and oil from entering the motor. Since the reducer housing is spliced ​​together by two end covers, how to make the spliced ​​reducer housing form a good seal with the bridge housing is a further problem faced by this design.

[0005] The main purpose of the utility model is to provide an electric drive axle assembly structure and a vehicle, aiming to solve the problem of how to form a good seal between the spliced ​​reducer housing and the axle housing.

[0006] To achieve the above objectives, the electric drive axle assembly structure proposed in the present invention includes:

[0007] A motor housing body, one end of which is opened in the first direction;

[0008] The reducer housing includes a first housing and a second housing arranged opposite to each other in the first direction, the first housing covering the open end of the motor housing body and enclosing the motor housing body to form a motor installation cavity, the second housing is located on a side of the first housing away from the motor housing body, and together with the first housing defines a reducer installation cavity, a first notch and a second notch are correspondingly provided at the connection between the first housing and the second housing, the first notch and the second notch are spliced ​​together to form a mounting opening on one side of the reducer housing; and

[0009] The bridge housing is located on one side of the reducer housing, and the bridge housing is provided with a matching opening that is sleeved and sealed with the installation opening.

[0010] In one embodiment, the end surfaces of the first housing and the second housing facing the bridge housing are provided with an annular protrusion arranged on the periphery of the installation port, and the end surface of the bridge housing facing the reducer housing is provided with an annular fitting portion sleeved on the periphery of the annular protrusion.

[0011] In one embodiment, the annular protrusion and the annular matching portion have two annular circumferential side surfaces that are arranged opposite to each other, and a sealing gap for accommodating sealant is provided between the two annular circumferential side surfaces.

[0012] In one embodiment, the sealing gap is set to be greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0013] In one embodiment, the electric drive axle assembly structure includes a motor arranged in the motor housing body and a reducer arranged in the reducer housing, the motor has a drive shaft extending along the first direction, and the drive shaft is set as the drive shaft of the reducer.

[0014] In one embodiment, the first housing is provided with an axial hole along the first direction, and the drive shaft is passed through the axial hole;

[0015] The electric drive axle assembly structure also includes a plurality of bearings sleeved on the periphery of the drive shaft and spaced apart in the first direction. The plurality of bearings include three first bearings, two of which are located at both ends of the drive shaft and are respectively mounted to the motor housing body and the second housing, and the other first bearing is mounted in the shaft hole.

[0016] In one embodiment, the reducer has an output shaft, and the electric drive axle assembly structure further includes:

[0017] A bearing seat is mounted on the axle housing, wherein the bearing seat is annular and integrally arranged; and

[0018] The third bearing is sleeved on the outer periphery of the output shaft and installed on the bearing seat.

[0019] In one embodiment, the electric drive axle assembly structure further includes at least one gasket, which is arranged between the bearing seat and the outer ring of the third bearing.

[0020] The present utility model further provides a vehicle, comprising an electric drive axle assembly structure, wherein the electric drive axle assembly structure comprises:

[0021] A motor housing body, one end of which is opened in the first direction;

[0022] The reducer housing includes a first housing and a second housing arranged opposite to each other in the first direction, the first housing covering the open end of the motor housing body and enclosing the motor housing body to form a motor installation cavity, the second housing is located on a side of the first housing away from the motor housing body, and together with the first housing defines a reducer installation cavity, a first notch and a second notch are correspondingly provided at the connection between the first housing and the second housing, the first notch and the second notch are spliced ​​together to form a mounting opening on one side of the reducer housing; and

[0023] The bridge housing is located on one side of the reducer housing, and the bridge housing is provided with a matching opening that is sleeved and sealed with the installation opening.

[0024] In one embodiment, the vehicle includes an electric vehicle or a hybrid vehicle.

[0025] In the technical solution of the present invention, one end of the motor housing body in the first direction is open, and the motor can be installed into the motor housing body from the open end of the motor housing body along the first direction. After the first shell cover is closed to the open end of the motor housing body, the reducer is installed to the side of the first shell facing away from the motor housing body, and then the second shell cover is closed to the side of the first shell facing away from the motor housing body. The reducer is accommodated in the reducer mounting cavity, and the first notch and the second notch on the side where the first shell and the second shell are spliced ​​together form a mounting opening. By fitting the mating opening of the bridge housing with the mounting opening, the part where the first shell and the second shell are spliced ​​together to form the mounting opening can be restricted in the mating opening, avoiding the displacement of the first shell and the second shell when sealing the reducer housing and the bridge housing, which causes difficulty in sealing between the housings, so that the spliced ​​reducer housing can form a good seal with the bridge housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 and Figure 2 This is a partial structural diagram of an embodiment of the electric drive axle assembly structure provided by the present utility model;

[0028] Figure 3 for Figure 2 Schematic diagram of the partial cross section of AA;

[0029] Figure 4 for Figure 2 Schematic cross-section of the middle AA;

[0030] Figure 5 for Figure 2 Schematic diagram of the first housing, the second housing and the reducer;

[0031] Figure 6 for Figure 5 The enlarged schematic diagram of point B in the middle;

[0032] Figure 7 for Figure 5 Schematic side view of .

[0033] Description of Figure Numbers:

[0034] 100. Electric drive axle assembly structure; 1. Motor housing body; 1a. Motor mounting cavity; 2. Reducer housing; 20a. Mounting port; 21. First housing; 21a. First notch; 21b. Shaft hole; 22. Second housing; 22a. First notch; 23. Annular protrusion; 2a. Reducer mounting cavity; 3. Axle housing; 31. Annular mating portion; 4. Motor; 41. Drive shaft; 5. Reducer; 51. Output shaft; 6. First bearing; 7. Bearing seat; 8. Second bearing.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] This application addresses the problem in the related art that an adapter plate is required between the motor and the reducer for assembly, making the adapter plate redundant. The application considers eliminating the end cover at one end of the motor, using the end cover at one end of the reducer as the end cover of the motor, and splicing the motor and reducer housings together. In order to facilitate the installation of the motor, the reducer housing is spliced ​​by two end covers. After the motor is installed, one end cover of the reducer is spliced ​​with the motor housing. After the reducer is installed, the other end cover of the reducer is spliced ​​with the front end cover. Therefore, the reducer housing is spliced ​​by two sub-housings and then assembled and sealed with the bridge housing to prevent external water and oil from entering the motor. Since the reducer housing is spliced ​​by two end covers, how to make the spliced ​​reducer housing form a good seal with the bridge housing is a further problem faced by this design.

[0040] The utility model provides an electric drive axle assembly structure, aiming to solve the problem of how to form a good seal between a spliced ​​reducer housing and an axle housing.

[0041] See also Figures 1 to 4 In one embodiment of the present utility model, the electric drive axle assembly structure 100 includes a motor housing body 1, a reducer housing 2 and a bridge housing 3, wherein one end of the motor housing body 1 is open in the first direction; the reducer housing 2 includes a first housing 21 and a second housing 22 arranged opposite to each other in the first direction, the first housing 21 is arranged to cover the open end of the motor housing body 1, and is enclosed with the motor housing body 1 to form a motor installation cavity 1a, the second housing 22 is located on the side of the first housing 21 away from the motor housing body 1, and together with the first housing 21 defines the reducer installation cavity 2a, a first notch 21a and a second notch 22a are correspondingly provided at the connection between the first housing 21 and the second housing 22, the first notch 21a and the second notch 22a are spliced ​​together to form a mounting opening 20a on one side of the reducer housing 2; the bridge housing 3 is located on one side of the reducer housing 2, and a mating opening is provided on the bridge housing 3 that is sleeved and sealed with the mounting opening 20a.

[0042] It can be understood that the motor housing body 1 is the core part of the electric drive axle, and one end thereof is open to facilitate connection with the reducer housing 2.

[0043] It can be understood that the shape of the motor housing body 1 is adapted to the motor 4, and the drive shaft 41 of the motor 4 extends to the open end of the motor housing body 1 to be connected to the input shaft of the reducer 5, or to provide a power source for the reducer 5.

[0044] The reducer housing 2 consists of the first housing 21 and the second housing 22. The first housing 21 covers the open end of the motor housing body 1 to form a motor installation cavity 1a; the second housing 22 is located on the other side of the first housing 21 and together with the first housing 21 forms the reducer installation cavity 2a.

[0045] The side portions of the first shell 21 and the second shell 22 are provided with the first notch 21a and the second notch 22a, which are spliced ​​together to form an installation opening 20a, so that when the reducer 5 is installed, part of the structure can make way when passing through the fitting opening from the installation opening 20a to be accommodated in the bridge housing 3, so as to facilitate the connection between the output shaft 51 of the reducer 5 and the front axle or rear axle passing through the bridge housing 3, and also facilitate the installation and maintenance of the components of the reducer 5.

[0046] The axle housing 3 is located on one side of the reducer housing 2. It is provided with a mating opening that is nested and sealed with the mounting opening 20a. The design of the mating opening ensures a perfect fit between the axle housing 3 and the reducer housing 2, effectively preventing the external environment from affecting the internal components.

[0047] It should be noted that in order to prevent external water and oil from entering the motor 4, it is necessary to seal between the two opposite side surfaces of the first shell 21 and the second shell 22. At the same time, the side of the first shell 21 and the second shell 22 facing the bridge housing 3 also needs to be sealed with the bridge housing 3.

[0048] Compared with directly connecting the reducer housing and the bridge housing with opposite flat end faces and then sealing them, since the mating port is sleeved with the installation port 20a, the first housing 21 and the second housing 22 are both constrained on the inner side of the mating port of the bridge housing 3, the radial positions of the first housing 21 and the second housing 22 in the installation port 20a can be positioned, and the failure of the seal between the first housing 21 and the second housing 22 can also be avoided.

[0049] In the technical solution of the present utility model, one end of the motor housing body 1 in the first direction is open, and the motor 4 can be installed into the motor housing body 1 from the open end of the motor housing body 1 along the first direction. After the first shell 21 is covered to the open end of the motor housing body 1, the reducer 5 is installed to the side of the first shell 21 facing away from the motor housing body 1, and then the second shell 22 is covered to the side of the first shell 21 facing away from the motor housing body 1. The reducer 5 is accommodated in the reducer installation cavity 2a, and the first shell 21 and the The first notch 21a and the second notch 22a on the side where the second shell 22 is spliced ​​together form an installation opening 20a. By fitting the matching opening of the bridge housing 3 with the installation opening 20a, the part where the first shell 21 and the second shell 22 are spliced ​​together to form the installation opening 20a can be restricted within the matching opening, thereby avoiding the first shell 21 and the second shell 22 shifting when sealing the reducer housing 2 and the bridge housing 3, causing difficulty in sealing between the housings, so that the spliced ​​reducer housing 2 can form a good seal with the bridge housing 3.

[0050] Specifically, see Figure 1 and Figure 6 In this embodiment, the end surfaces of the first shell 21 and the second shell 22 facing the bridge housing 3 are provided with an annular protrusion 23 arranged on the periphery of the installation port 20a, and the end surface of the bridge housing 3 facing the reducer housing 2 is provided with an annular matching portion 31 arranged on the periphery of the annular protrusion 23.

[0051] As will be appreciated, the annular protrusion 23 is provided on the end surfaces of the first and second housings 21, 22 facing the axle housing 3. The annular protrusion 23 is positioned around the mounting opening 20a, forming a protruding structure. The provision of the annular protrusion 23 not only enhances the stability of the connection but also provides a sealing surface for subsequent sealing.

[0052] The end surface of the axle housing 3 facing the reducer housing 2 is provided with the annular fitting portion 31, which is sleeved around the annular protrusion 23. The annular fitting portion 31 can effectively surround the annular protrusion 23 to form a good mechanical fit.

[0053] Of course, the annular fitting portion 31 may be arranged to protrude from the end surface of the axle housing 3 , or may be arranged to be flush with the end surface of the axle housing 3 . The specific arrangement may be determined based on actual conditions, and this specification does not limit this.

[0054] The annular protrusion 23 and the annular fitting can be set to a circular ring, and of course can also be set to a square or special-shaped structure. The specific structure can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0055] Preferably, the annular protrusion 23 and the annular mating portion 31 are configured as circular rings. Because a circular structure maintains the same radius and symmetry in all directions, it evenly distributes pressure when subjected to force, effectively reducing stress concentration and potential points of damage or failure. Circular components are also relatively simple to manufacture and process, making alignment and mating easier during assembly. More importantly, the circular structure provides a larger contact area on the sealing surface, contributing to a better seal and preventing liquid or gas leakage.

[0056] In this way, the annular fitting portion 31 is sleeved on the periphery of the annular protrusion 23, ensuring the fit between the reducer housing 2 and the axle housing 3 during connection, thereby improving the sealing effect.

[0057] Specifically, in this embodiment, the annular protrusion 23 and the annular matching portion 31 have two annular circumferential side surfaces that are arranged opposite to each other, and a sealing gap for accommodating the sealant is provided between the two annular circumferential side surfaces.

[0058] The annular protrusion 23 and the annular matching portion 31 both have two annular circumferential side surfaces arranged opposite to each other, ensuring that the two can form a stable contact surface when connected, providing a good basis for sealing.

[0059] A sealing gap for accommodating sealant is provided between the two annular circumferential side surfaces. The sealing gap can effectively accommodate the sealant to form a closed sealing layer, thereby further enhancing the sealing performance.

[0060] The sealant fills the tiny gap between the two annular circumferential sides to ensure that there is no liquid or gas leakage, and provides a certain elastic compensation to adapt to displacement caused by temperature changes and mechanical vibrations.

[0061] It should be noted that, since the sealant can be accommodated between the two annular circumferential side surfaces, the height of the annular circumferential side surfaces determines the size of the bonding surface. When a more reliable seal needs to be established, the height of the annular circumferential side surfaces can be appropriately increased.

[0062] Of course, the sealant is not limited to being provided between the two annular circumferential side surfaces, but may also be provided between the end surface of the annular fitting portion 31 facing the reducer housing 2 and the reducer housing 2 to form a larger sealing surface.

[0063] Specifically, setting the sealing gap too large or too small can result in an unsatisfactory sealing effect, thereby affecting the performance and reliability of the device. Therefore, it is particularly important to properly design the size range of the sealing gap. In this embodiment, the sealing gap is set to be greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

[0064] The sealing gap is set to be greater than or equal to 0.1mm. This minimum value ensures that the sealing gap can accommodate sufficient sealant, avoiding the inability of the sealant to effectively fill the gap due to the gap being too small, thereby affecting the sealing performance. At the same time, the appropriate minimum gap can also prevent seal failure caused by thermal expansion or material deformation.

[0065] The sealing gap is set to be less than or equal to 0.5mm. This maximum value is set to limit the sealing gap from being too large to prevent the sealant from leaking or losing its effective sealing ability during operation. Excessively large gaps may prevent the sealant from forming a continuous sealing surface, reducing the overall sealing effect.

[0066] The sealing gap preferably has a value between 0.2 mm and 0.3 mm.

[0067] Within the above-set sealing gap range, the sealant can fully exert its elasticity and adhesion properties, thereby effectively preventing the leakage of liquid or gas, which not only improves the sealing effect, but also enhances the adaptability and durability of the component under various working conditions.

[0068] Furthermore, in the related art, because the power is transmitted between the motor drive shaft and the reducer input shaft by a spline structure, under the condition of long-term high speed or high load, the spline will be worn, and the complexity of the structure and the manufacturing cost will be increased, and some energy loss will be caused. In order to solve the above problems, please refer to Figure 3 and Figure 4 In this embodiment, the electric drive axle assembly structure 100 includes a motor 4 arranged in the motor housing body 1, and a reducer 5 arranged in the reducer housing 2, and the motor 4 has a drive shaft 41 extending along the first direction, and the drive shaft 41 is set as the drive shaft 41 of the reducer 5.

[0069] Integrating the motor 4 and reducer 5 eliminates connecting components, reduces potential energy loss during transmission, and improves overall transmission efficiency. This also reduces the number of components, simplifying design and manufacturing. Furthermore, the integrated structure generally offers greater rigidity, can withstand greater torque, and avoids the play and flexibility associated with spline connections.

[0070] Thus, by rationally integrating the motor 4 and the reducer 5, the overall installation space is reduced, and the space utilization of the vehicle is improved. At the same time, the integrated design also helps to reduce production costs and simplify the assembly process.

[0071] It should be noted that during the operation of the motor 4, the two ends of the drive shaft 41 can effectively support the drive shaft 41 through two bearings, provide the necessary stability, and help maintain the straightness of the shaft and prevent the shaft from bending, ensuring the smooth operation of the motor 4, while dispersing the load borne by the bearings and extending their service life. It effectively resists the effects of radial and axial forces and reduces the deflection or displacement of the shaft caused by unbalanced loads or instantaneous impacts. Therefore, in the related art, a bearing is provided at each end of the drive shaft 41 of the motor 4. Similarly, a bearing is also provided at each end of the input shaft of the reducer 5. Then, the motor 4 and the reducer 5 are both provided with two bearings, for a total of four bearings.

[0072] Further, to save costs, please refer to Figure 3 and Figure 4 In this embodiment, the first shell 21 is provided with an axial hole 21b along the first direction, and the drive shaft 41 is passed through the axial hole 21b; the electric drive axle assembly structure 100 also includes a plurality of bearings sleeved on the periphery of the drive shaft 41 and spaced apart in the first direction, and the plurality of bearings include three first bearings 6, two of which are respectively provided at both ends of the drive shaft 41 and are respectively installed to the motor housing body 1 and the second shell 22, and the other first bearing 6 is installed in the axial hole 21b.

[0073] The two first bearings 6 are provided at both ends of the drive shaft 41 and are mounted on the motor housing body 1 and the second housing 22, respectively, providing end support for the drive shaft 41 and reducing bending and vibration of the drive shaft 41. The other first bearing 6 is mounted in the shaft hole 21b, further enhancing support for the drive shaft 41, particularly in the middle portion of the shaft, thereby better distributing the load.

[0074] In this way, only three bearings are needed to support the drive shaft 41. Compared with the related art that requires four bearings, the technical solution of the present invention can save one bearing and reduce the cost of oil seals and bearings.

[0075] In related technologies, when installing bearings, two semicircular bearing seats are fastened together to form a complete annular seat body, which can prevent the bearing from axial movement during operation, thereby maintaining it in the designed position. During assembly, it is necessary to use bolts to connect them into a full-circular structure to support the bearing. The two semicircular structures need to be installed together first, and then the threads are processed and connected with bolts. During assembly, they need to be used in one-to-one pairs, which increases the difficulty of production line management of the process.

[0076] Further, to reduce the difficulty of assembly, please refer to Figure 5 and Figure 7 In this embodiment, the reducer 5 has an output shaft 51, and the electric drive axle assembly structure 100 also includes a bearing seat 7 and a second bearing 8. The bearing seat 7 is installed on the bridge housing 3, and the bearing seat 7 is annular and integrated. The second bearing 8 is sleeved on the outer periphery of the output shaft 51 and is installed on the bearing seat 7.

[0077] As can be understood, the full-circle structure offers greater integrity, enabling more even load distribution and reducing stress concentration. The bearing seat 7 is more robust when bearing radial and axial forces, effectively reducing the risk of damage due to overload. Furthermore, the annular design may be simpler to manufacture and assemble.

[0078] In this way, the bearing seat 7 of the output shaft 51 is a whole circle and only needs to be processed in one piece without the need for thread processing, which reduces errors and docking problems during the assembly process and reduces production costs and complexity.

[0079] In this embodiment, the electric drive axle assembly structure 100 further includes at least one gasket, which is arranged between the bearing seat 7 and the outer ring of the second bearing 8 .

[0080] The gasket is a thin sheet of material, typically used to provide spacing, support, or sealing.

[0081] Because the gasket can absorb the impact caused by movement or vibration, it reduces the direct impact on the bearing and improves the stability of the overall structure. By placing a gasket between the bearing seat 7 and the outer ring of the second bearing 8, the gap between the two can be filled to ensure better fit and tightness.

[0082] “At least one gasket” is not limited to having only one gasket. According to design requirements, multiple gaskets may be used to achieve better support effect or gap adjustment.

[0083] In this way, the preload force of the second bearing 8 is solved by selecting a pad, the process is simple, and the production line management is simple.

[0084] The present invention also proposes a vehicle, which includes a vehicle body and an electric drive axle assembly structure 100. The specific structure of the electric drive axle assembly structure 100 refers to the above-mentioned embodiment. Since this vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0085] In an embodiment of the present invention, the vehicle comprises an electric vehicle or a hybrid vehicle. The electric drive axle structure has good sealing performance, which can ensure the safety of the electric vehicle or hybrid vehicle when the electric vehicle or hybrid vehicle encounters wet and flooded roads, rainy or snowy weather during use.

[0086] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electric drive axle assembly structure, characterized in that: include: A motor housing body, one end of which is opened in the first direction; The reducer housing includes a first housing and a second housing arranged opposite to each other in the first direction, the first housing covering the open end of the motor housing body and enclosing the motor housing body to form a motor installation cavity, the second housing is located on a side of the first housing away from the motor housing body, and together with the first housing defines a reducer installation cavity, a first notch and a second notch are correspondingly provided at the connection between the first housing and the second housing, the first notch and the second notch are spliced ​​together to form a mounting opening on one side of the reducer housing; and The bridge housing is located on one side of the reducer housing, and the bridge housing is provided with a matching opening that is sleeved and sealed with the installation opening.

2. The electric drive axle assembly structure according to claim 1, characterized in that: The end surfaces of the first housing and the second housing facing the bridge housing are convexly provided with an annular convex portion arranged on the periphery of the installation port, and the end surface of the bridge housing facing the reducer housing is provided with an annular matching portion sleeved on the periphery of the annular convex portion.

3. The electric drive axle assembly structure according to claim 2, characterized in that: The annular protrusion and the annular matching portion have two annular circumferential side surfaces that are arranged opposite to each other, and a sealing gap for accommodating sealant is provided between the two annular circumferential side surfaces.

4. The electric drive axle assembly structure according to claim 3, characterized in that: The sealing gap is set to be greater than or equal to 0.1 mm and less than or equal to 0.5 mm.

5. The electric drive axle assembly structure according to claim 1, characterized in that: The electric drive axle assembly structure includes a motor arranged in the motor housing body and a reducer arranged in the reducer housing. The motor has a drive shaft extending along the first direction, and the drive shaft is set as the drive shaft of the reducer.

6. The electric drive axle assembly structure according to claim 5, characterized in that: The first housing is provided with an axial hole along the first direction, and the drive shaft is passed through the axial hole; The electric drive axle assembly structure also includes a plurality of bearings sleeved on the periphery of the drive shaft and spaced apart in the first direction. The plurality of bearings include three first bearings, two of which are located at both ends of the drive shaft and are respectively mounted to the motor housing body and the second housing, and the other first bearing is mounted in the shaft hole.

7. The electric drive axle assembly structure according to claim 1, characterized in that: The reducer has an output shaft, and the electric drive axle assembly structure further includes: A bearing seat is mounted on the axle housing, wherein the bearing seat is annular and integrally arranged; and The second bearing is sleeved on the outer periphery of the output shaft and installed on the bearing seat.

8. The electric drive axle assembly structure according to claim 7, characterized in that: The electric drive axle assembly structure further includes at least one gasket, which is arranged between the bearing seat and the outer ring of the second bearing.

9. A vehicle, characterized in that: It comprises the electric drive axle assembly structure according to any one of claims 1 to 8.

10. The vehicle according to claim 9, wherein: The vehicle includes an electric vehicle or a hybrid vehicle.

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