Electric drive axle assembly and vehicle

Abstract

An electric drive axle assembly, comprising: an axle housing (1), a reducer box body (2) and fastening bars (4). The axle housing is provided with a through mounting channel (16) in a first direction, the reducer box body being mounted in the mounting channel in the first direction, and the fastening bars being mounted outside the reducer box body. The fastening bars, the axle housing and the reducer box body are connected by means of first connecting members (5) passing in the first direction, and the fastening bars are connected to the reducer box body by means of second connecting members (6) passing in a second direction. The assembly enhances the connection reliability of axle housings and reducer box bodies under the action of alternating loads, and reduces the problems that connecting members are prone to loosening and joint surfaces of the axle housings and the reducer box bodies are offset with respect to each other. Further provided is a vehicle comprising the electric drive axle assembly.

Description

Electric drive axle assembly and vehicle

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202411398271.7, filed on September 30, 2024, entitled “Electric drive axle assembly and vehicle”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicles, in particular to an electric drive axle assembly and a vehicle. BACKGROUND

[0004] The electric drive axle includes a reducer, an axle housing and the like structure, the reducer is an important component of the electric drive axle, the torque output by the motor is transmitted to the wheel after being reduced and increased in torque by the reducer.

[0005] However, in the prior art, the flange interface of the reducer shell and the drive axle housing is connected by bolts, usually, the maximum deformation of the axle housing occurs in the middle, and the bolts are distributed in the circumference, which can easily cause the bolts to loosen or other fastening failure, such as the problem of relative offset of the combined surface of the axle housing and the reducer, which has a great safety hazard. SUMMARY

[0006] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an electric drive axle assembly, which enhances the connection reliability of the axle housing and the reducer box under alternating load, and reduces the problem of easy loosening of the connecting piece and relative offset of the combined surface of the axle housing and the reducer box.

[0007] According to the electric drive axle assembly of the embodiments of the present application, the electric drive axle assembly comprises an axle housing, a reducer box and a fastening strip; the axle housing is provided with a mounting channel penetrating in a first direction; the reducer box is mounted in the mounting channel in the first direction; the fastening strip is installed outside the reducer box, the fastening strip, the axle housing and the reducer box are connected by a first connecting piece penetrating in the first direction, and the fastening strip and the reducer box are connected by a second connecting piece penetrating in a second direction.

[0008] According to the electric drive axle assembly of the embodiments of the present application, the fastening strip is connected to the reducer box and the axle housing in different directions, which can improve the connection reliability between the reducer box and the axle housing, reduce the risk of loosening of the connection between the reducer shell and the drive axle housing, and when the axle housing deforms, since the axle housing and the reducer box are connected by the fastening strip and the first connecting piece and the second connecting piece, the problem of loosening of the first connecting piece and the second connecting piece under alternating load is reduced, and the problem of offset of the combined surface is also reduced.

[0009] According to the electric drive axle assembly, the axle housing comprises a mounting window, the mounting channel is formed in the mounting window, the outer peripheral wall of the reducer box body is formed with a mounting flange, the fastening strips are located on both sides of the mounting window, and the first connecting pieces are sequentially arranged in the mounting flange, the mounting window and the fastening strips.

[0010] According to the electric drive axle assembly, the outer periphery of the reducer box body comprises a first mounting part arranged in a circumferential direction, the fastening strips are arranged in the first mounting part and connected with the first mounting part through the second connecting pieces to be connected with the reducer box body.

[0011] According to the electric drive axle assembly, the fastening strips comprise a plurality of first connecting holes and second connecting holes arranged at intervals, the first connecting holes are arranged in a first direction, the second connecting holes are arranged in a second direction, and the first connecting pieces and the second connecting pieces are a plurality of connecting pieces, each first connecting piece is arranged in a corresponding first connecting hole to be connected with the axle housing and the reducer box body, and each second connecting piece is arranged in a corresponding second connecting hole to be connected with the reducer box body.

[0012] According to the electric drive axle assembly, the fastening strips are arranged with grooves and protrusions arranged at intervals along a length direction, the first connecting holes are arranged at the protrusions along the first direction, and the second connecting holes are arranged at the grooves along the second direction.

[0013] According to the electric drive axle assembly, the fastening strips are a plurality of fastening strips, part of the fastening strips are arranged at top and bottom of the reducer box body, and the other part of the fastening strips are arranged at side of the reducer box body, and the plurality of fastening strips are connected with the axle housing and the reducer box body along the first direction and connected with the reducer box body along the second direction.

[0014] According to the electric drive axle assembly, the shape of the bottom surface of the fastening strip is matched with the shape of the outer surface of the reducer box body at a corresponding position.

[0015] According to the electric drive axle assembly, the side of the reducer box body comprises two first inclined surfaces arranged on both sides of a central axis of the axle housing in an axial direction, and each first inclined surface is provided with at least one fastening strip.

[0016] The electric drive axle assembly according to the embodiment of the present application further comprises a half shaft bushing and a half shaft sleeve, two ends of the axle housing are provided with housing ends, the reducer housing comprises a mounting hole, an outer diameter of the half shaft bushing is smaller than an inner diameter of the housing end and the half shaft bushing penetrates into the mounting hole along an inside of the housing end to be connected with the reducer housing, and the half shaft bushing is sleeved with the half shaft sleeve at the other end, and the half shaft sleeve is connected with the housing end.

[0017] The electric drive axle assembly according to the embodiment of the present application, the half shaft sleeve comprises a first pipe segment and a second pipe segment, an outer diameter of the first pipe segment is smaller than an outer diameter of the second pipe segment, an inner diameter of the first pipe segment is greater than an outer diameter of the half shaft bushing, the first pipe segment is sleeved at an end of the half shaft bushing and an outer periphery thereof is in contact with an inner periphery of the housing end, and the second pipe segment is axially abutted with the housing end.

[0018] The electric drive axle assembly according to the embodiment of the present application further comprises a first sealing member and a second sealing member, an outer periphery of each of two ends of the half shaft bushing is provided with a first ring groove and a second ring groove, the first ring groove is sleeved with the first sealing member, the second ring groove is sleeved with the second sealing member, and when the half shaft bushing penetrates into the mounting hole, the first sealing member is abutted with the reducer housing and the second sealing member is abutted with the half shaft sleeve.

[0019] The electric drive axle assembly according to the embodiment of the present application, the half shaft sleeve is press-connected with the housing end.

[0020] The electric drive axle assembly according to the embodiment of the present application, the reducer housing is integrally formed in the first direction, and the reducer housing is detachably connected in a direction parallel to the half shaft of the vehicle.

[0021] The electric drive axle assembly according to the embodiment of the present application, the reducer housing is equally arranged on both sides of the first direction of the axle housing.

[0022] The electric drive axle assembly according to the embodiment of the present application, a gap is left between the axle housing and the reducer housing.

[0023] The electric drive axle assembly according to the embodiment of the present application, the axle housing further comprises a drainage port, the drainage port is adapted to drain water when the water from the external environment enters the gap between the axle housing and the reducer housing.

[0024] The present application further discloses a vehicle comprising the electric drive axle assembly.

[0025] Compared with the prior art, the vehicle can improve the connection reliability of the reducer housing and the axle housing under alternating load, reduce system deformation, avoid the meshing of gears from deviating and cause NVH problem, and improve the service life of the electric drive axle. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and readily understood by describing in detail exemplary embodiments, including the best modes contemplated for carrying out the application, in connection with the accompanying drawings, in which:

[0027] Fig. 1 is a structural schematic diagram of an axle housing according to an embodiment of the present application;

[0028] Fig. 2 is a structural schematic diagram of a reducer housing according to an embodiment of the present application;

[0029] Fig. 3 is a structural schematic diagram of an electric drive axle assembly according to an embodiment of the present application;

[0030] Fig. 4 is a structural schematic diagram of a fastening strip according to an embodiment of the present application;

[0031] Fig. 5 is a sectional schematic diagram of the connection between the axle housing and the reducer housing according to an embodiment of the present application;

[0032] Fig. 6 is a schematic diagram of the position of the electric drive axle assembly in a vehicle according to an embodiment of the present application.

[0033] Fig. 6 is a schematic diagram of the position of the electric drive axle assembly in a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The same or similar components are denoted by the same or similar reference numerals throughout the drawings, and repeated description thereof is omitted. The embodiments described below are merely examples for explaining the present application, and should not be construed as limiting the present application.

[0035] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0036] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Unless otherwise specified, the front-rear direction in the present application is the longitudinal direction of the vehicle 1000, i.e. the X direction; the left-right direction is the transverse direction of the vehicle 1000, i.e. the Y direction; the up-down direction is the vertical direction of the vehicle 1000, i.e. the Z direction.

[0038] The electric drive axle assembly 100 according to the embodiments of the present application is described below with reference to FIGS. 1-6, the fastening strip 4 is used to connect the reducer housing 2 and the axle housing 1 in different directions, to improve the reliability of the connection between the reducer housing 2 and the axle housing 1, and to reduce the problem of easy loosening under alternating load; the reducer housing 2 and the double motor 3 share a housing, which enhances the integrity of the double motor 3 and the reducer housing 2, and at the same time, the integral axle housing 1 is used, which has less number of parts, simple structure and good rigidity, and has a gap between the axle housing 1 and the reducer housing 2, so that the deformation of the axle housing 1 does not easily cause the deformation of the reducer housing 2, has high reliability and reduces the NVH problem; the axle housing 1 and the reducer housing do not need to be sealed, the sealing between the half shaft bushing 13 and the reducer housing 2 and between the half shaft bushing 13 and the half shaft sleeve 14 is used, which reduces the sealing difficulty and increases the sealing reliability; the integral axle housing 1 and the reducer housing 2 are inserted and assembled, which is convenient to install.

[0039] As shown in FIGS. 1-6, the electric drive axle assembly 100 according to one embodiment of the present application comprises an axle housing 1, a reducer housing 2 and a fastening strip 4.

[0040] Wherein, the axle housing 1 is provided with a mounting channel 16 through in the first direction; the reducer housing 2 is mounted in the mounting channel 16 in the first direction, the fastening strip 4 is mounted outside the reducer housing 2, the fastening strip 4, the axle housing 1 and the reducer housing 2 are connected through the first connecting piece 5 through in the first direction, and the fastening strip 4 and the reducer housing 2 are connected through the second connecting piece 6 through in the second direction.

[0041] In practice, the axle housing 1 is an important structure installed on the automobile drive axle, which mainly functions to support and protect the main reducer, differential, half shaft and other key components; connecting the axle housing 1 and the reducer housing 2 can achieve the functions of power transmission and protection of the internal components of the reducer housing 2. For example, the reducer housing 2 is inserted and mounted in the mounting channel 16 in the first direction, and the reducer housing 2 is connected to the axle housing 1 in the form of insertion, which can first support the reducer housing 2 by the axle housing 1, and the insertion of the reducer housing 2 in the first direction with the axle housing 1 can make the initial connection between the reducer housing 2 and the axle housing 1 more convenient.

[0042] In addition, the length direction of the axle housing 1 is parallel to the half shaft of the vehicle 1000, that is, it is arranged along the Y direction of the vehicle 1000, the first direction is perpendicular to the half shaft of the vehicle 1000, that is, it is inserted into the mounting channel 16 along the X direction of the vehicle 1000, the axle housing 1 only bears the Z direction supporting force on the reducer housing 2, and the interaction force between the parallel shafts in the reducer housing 2 is borne by the reducer housing 2 itself, the parallel shafts in the reducer housing 2 are parallel to the direction of the half shaft of the vehicle 1000; after the insertion is completed, the fastening strip 4 is connected to the axle housing 1 and the reducer housing 2 in the first direction through the first connecting piece 5, that is, it is connected to the axle housing 1 in the direction perpendicular to the half shaft of the vehicle 1000, and then the fastening strip 4 is connected to the reducer housing 2 in the second direction through the second connecting piece 6, wherein the second direction is the direction from the outside of the reducer housing 2 to the center of the inside of the reducer housing 2, and the second direction can be perpendicular to the first direction and the direction of the half shaft of the vehicle 1000, or the second direction has other angles with the first direction and the direction of the half shaft of the vehicle 1000, which is determined according to the angle relationship between the outer side of the reducer housing 2 and the half shaft of the vehicle 1000.

[0043] As shown in FIG. 3, assuming that the top surface of the reducer housing 2 is a surface parallel to the horizontal plane, when the second connecting piece 6 connects the reducer housing 2 through the fastening strip 4 in the direction perpendicular to the top surface of the reducer housing 2, the second direction is the direction perpendicular to the half shaft direction of the vehicle 1000 and perpendicular to the first direction.

[0044] It should be noted that the number of fastening strips 4 can be set to be multiple, and are distributed along the circumference of the reducer housing 2 and connected to the axle housing 1, so that the circumference of the reducer housing 2 and the axle housing 1 both have connected positions, improving the stress uniformity and reliability of the connection between the reducer housing 2 and the axle housing 1; of course, the number of fastening strips 4 can also be one, such as a whole fastening strip 4 around the circumference of the reducer housing 2 and connected to the axle housing 1, but when the fastening strip 4 is set to be multiple, the connection is more convenient and has high flexibility, easy to disassemble, and can achieve reliable connection.

[0045] When the axle housing 1 is connected with the reducer housing 2, the fastening strip 4 can be first connected to the axle housing 1 and the reducer housing 2 through the first connecting piece 5, and then connected to the reducer housing 2 through the second connecting piece 6, or the fastening strip 4 can be first connected to the reducer housing 2 through the second connecting piece 6, and then connected to the axle housing 1 and the reducer housing 2 through the first connecting piece 5; the connection by the fastening strip 4 enhances the connection reliability of the fastening strip 4 and the reducer housing 2, that is, different positions of the fastening strip 4 are connected to the reducer housing 2 through connecting pieces in different directions, so that the reducer housing 2 and the axle housing 1 are connected not only in one direction, improving the connection reliability of the axle housing 1 and the reducer housing 2, reducing the risk of loosening of the connection between the reducer housing 2 and the axle housing 1, thereby avoiding problems such as early failure of the gear, poor NVH performance, and even failure of the axle housing 1 and the reducer housing 2 leading to loss of load bearing capacity of the axle housing 1.

[0046] In some embodiments, the axle housing 1 includes a mounting window 11, a mounting channel 16 is formed in the mounting window 11, an outer peripheral wall of the reducer housing 2 is formed with a mounting flange 21, the fastening strip 4 is located on both sides of the mounting window 11 with the mounting flange 21, and the first connecting piece 5 is sequentially provided in the mounting flange 21, the mounting window 11 and the fastening strip 4.

[0047] In practice, the mounting window 11 is provided with a mating surface 113 in the first direction, referring to FIG. 1, the outer peripheral wall of the reducer housing 2 is provided with a mounting flange 21, when the reducer housing 2 is inserted into the mounting window 11, first the inner periphery of the mounting window 11 can support the reducer housing 2, one mating surface 113 of the axle housing 1 is in pressure contact with the mounting flange 21 of the outer peripheral wall of the reducer housing 2, thereby determining the mating position of the axle housing 1 and the reducer housing 2, and the fastening strip 4 is in contact with another mating surface 113 of the axle housing 1 in the first direction, the first connecting piece 5 passes through the fastening strip 4 along one side of the fastening strip 4 and passes through one mating surface 113 of the axle housing 1, and then passes through another mating surface 113 of the axle housing 1 and the mounting flange 21, the first connecting piece 5 can be a bolt, which fixedly connects the fastening strip 4 to the axle housing 1 and the reducer housing 2 in the first direction.

[0048] Thus, by arranging the mounting window 11, not only is support formed between the reducer housings 2, but the reducer housings 2 are also connected through the fastening strip 4 and the first connecting member 5 and the second connecting member 6. After the reducer housings 2 are connected to the axle housing 1, the reducer housings 2 are prevented from moving in the first direction, and reliable connection is formed between the reducer housings 2 and the axle housing 1.

[0049] In some embodiments, the outer periphery of the reducer housing 2 includes a first mounting portion 22 arranged circumferentially, and the fastening strip 4 is arranged on the first mounting portion 22 and connected to the first mounting portion 22 through the second connecting member 6 to be connected to the reducer housing 2.

[0050] The first mounting portion 22 is distributed along the circumference of the reducer housing 2. After the reducer housing 2 is inserted into the mounting window 11 of the axle housing 1, the mounting flange 21 of the reducer housing 2 is pressed against one mating surface 113 of the axle housing 1. The fastening strip 4 is arranged outside the other mating surface 113 of the axle housing 1 and in contact with the mating surface 113. The fastening strip 4 is above the first mounting portion 22 and in contact with the first mounting portion 22. The fastening strip 4 is connected to the reducer housing 2 in the second direction through the second connecting member 6. The second direction is a direction along which the outer side of the fastening strip 4 adheres to the reducer housing 2 toward the center of the reducer housing 2. The second connecting member 6 can be a bolt. Reliable connection is achieved between the fastening strip 4 and the reducer housing 2 through the second connecting member 6, and reliable connection is achieved between the fastening strip 4 and the axle housing 1 and the reducer housing 2 through the first connecting member 5. Thus, preliminary connection is achieved between the reducer housing 2 and the axle housing 1 and the reducer housing 2. The fastening strip 4 is connected to the reducer housing 2 in the second direction through the second connecting member 6, thereby achieving reliable connection between the reducer housing 2 and the axle housing 1.

[0051] In some embodiments, the fastening strip 4 includes a plurality of first connecting holes 41 and second connecting holes 42 arranged at intervals. The first connecting holes 41 are penetrated in the first direction, and the second connecting holes 42 are penetrated in the second direction. The first connecting member 5 and the second connecting member 6 are a plurality of members. Each first connecting member 5 is arranged through a corresponding first connecting hole 41 to be connected to the axle housing 1 and the reducer housing 2, and each second connecting member 6 is arranged through a corresponding second connecting hole 42 to be connected to the reducer housing 2.

[0052] Specifically, as shown in FIGS. 1-3, the mounting window 11 is provided with a plurality of third connecting holes 111 penetrating in the first direction, the mounting flange 21 is provided with a plurality of fourth connecting holes 211 penetrating in the first direction, the plurality of first connecting holes 41, the plurality of third connecting holes 111 and the plurality of fourth connecting holes 211 correspond one by one, each first connecting piece 5 connects the fastening strip 4 with the mounting window 11 and the reducer housing 2 by sequentially penetrating through the corresponding first connecting hole 41, third connecting hole 111 and fourth connecting hole 211; the first mounting portion 22 is provided with a plurality of fifth connecting holes 221 arranged in the second direction, and the plurality of fifth connecting holes 221 and the plurality of second connecting holes 42 correspond one by one, and each second connecting piece 6 is arranged through the corresponding second connecting hole 42 and fifth connecting hole 221 to connect the fastening strip 4 with the reducer housing 2.

[0053] Among them, the plurality of first connecting holes 41 and the plurality of second connecting holes 42 are arranged at intervals, wherein the first connecting hole 41 and the second connecting hole 42 are both provided with internal threads, and the first connecting piece 5 and the second connecting piece 6 are provided with external threads, the plurality of first connecting pieces 5 correspond in number to the plurality of first connecting holes 41, and the plurality of second connecting pieces 6 correspond in number to the plurality of second connecting holes 42, that is, along the length direction of the fastening strip 4, one first connecting piece 5 connects the axle housing 1 with the fastening strip 4 along one corresponding first connecting hole 41, and one second connecting piece 6 connects the fastening strip 4 with the reducer housing 2 along the second connecting hole 42 adjacent to the first connecting hole 41, thereby realizing the one-to-one interval arrangement of the plurality of first connecting pieces 5 and the plurality of second connecting pieces 6, that is, the force of the first connecting piece 5 along the first direction to the fastening strip 4, the axle housing 1 and the reducer housing 2 is spaced apart from the force of the second connecting piece 6 along the second direction to the fastening strip 4 and the reducer housing 2, so that the fastening strip 4 is balanced when connected to the axle housing 1 and the reducer housing 2 in different directions, which can realize reliable connection of the fastening strip 4 with the axle housing 1 and the reducer housing 2.

[0054] In some embodiments, the fastening strip 4 is provided with a plurality of grooves 43 and a plurality of protrusions 44 distributed at intervals along the length direction, the first connecting hole 41 is arranged at the protrusion 44 along the first direction, and the second connecting hole 42 penetrates through the groove 43 along the second direction.

[0055] Referring to FIG. 4, the fastening strip 4 is provided with a plurality of grooves 43 and a plurality of protrusions 44 along the length direction, the protrusions 44 and the grooves 43 are arranged at intervals one by one, the protrusion 44 is provided with a first connecting hole 41 penetrating in the first direction, and the groove 43 is provided with a second connecting hole 42 penetrating in the second direction, that is, when the second connecting piece 6 connects the fastening strip 4 to the reducer housing 2 along the second direction, the end of the second connecting piece 6 can be hidden in the groove 43, thereby maintaining the flatness of the surface of the fastening strip 4.

[0056] In addition, the first connecting member 5 is arranged through the first connecting hole 41 at the position of the protrusion 44 to connect the axle housing 1 and the reducer housing 2 through the fastening strip 4, and the length of the first connecting member 5 is set to be relatively long, and the first connecting hole 41 is arranged at the position of the protrusion 44, so that the strength and stability of the connection between the fastening strip 4, the axle housing 1 and the reducer housing 2 can be enhanced.

[0057] In some embodiments, the fastening strip 4 is provided in plurality, and some of the plurality of fastening strips 4 are arranged at the top and bottom of the reducer housing 2, and the other fastening strips 4 are arranged at the side of the reducer housing 2, and the plurality of fastening strips 4 are connected to the axle housing 1 and the reducer housing 2 in the first direction, and are further connected to the reducer housing 2 in the second direction.

[0058] In practice, the axle housing 1 is integrally formed, and the mounting window 11 of the axle housing 1 can be polygonal or other shapes, for example, when the mounting window 11 is polygonal, that is, the plurality of surfaces of the axle housing 1 are in contact with the periphery of the reducer housing 2, and by arranging the plurality of fastening strips 4 at intervals around the reducer housing 2, the connection between the plurality of positions of the reducer housing 2 and the axle housing 1 can be maintained, for example, when the reducer housing 2 and the top and bottom are flat, one fastening strip 4 is connected to the axle housing 1 and the reducer housing 2 at the top of the reducer housing 2, and another fastening strip 4 is connected to the axle housing 1 and the reducer housing 2 at the bottom of the reducer housing 2, and at this time, the fastening strip 4 and the reducer housing 2 are connected by the second connecting member 6 in the second direction, and the second direction is perpendicular to the first direction and perpendicular to the direction of the half shaft of the vehicle 1000.

[0059] And some of the fastening strips 4 connect the side of the axle housing 1 and the side of the reducer housing 2, that is, the plurality of fastening strips 4 are arranged at different surfaces of the reducer housing 2, and when the plurality of fastening strips 4 are arranged at intervals around the reducer housing 2, the uniformity and reliability of the connection between the axle housing 1 and the reducer housing 2 can be ensured.

[0060] In some embodiments, the shape of the bottom surface of the fastening strip 4 matches the shape of the outer surface of the corresponding position of the reducer housing 2.

[0061] For example, when the outer surface of the reducer housing 2 corresponding to the connection of the fastening strip 4 is flat, the bottom surface of the fastening strip 4 is also flat, and when the outer surface of the reducer housing 2 corresponding to the connection of the fastening strip 4 is arc-shaped, the bottom surface of the fastening strip 4 is also arc-shaped, so that the fastening strip 4 is always in close contact with the reducer housing 2, for example, the top surface of the reducer housing 2 can be flat, and the side surface of the reducer housing 2 can be arc-shaped, and the bottom surface of the fastening strip 4 at different positions is always in contact with the outer surface of the reducer housing 2 at the corresponding position, so as to further improve the reliability of the connection between the fastening strip 4 and the reducer housing 2.

[0062] In some embodiments, the side of the reducer housing 2 comprises two first inclined surfaces 24 located on both sides of the central axis of the axle housing 1 in the axial direction, and each first inclined surface 24 is provided with at least one fastening strip 4.

[0063] Specifically, the axial direction of the axle housing 1 is parallel to the axial direction of the half shaft of the vehicle 1000, the mounting window 11 is configured as a polygon, the side of the mounting window 11 comprises at least two second inclined surfaces 15, such as the mounting window 11 comprises two second inclined surfaces 15 on each side in the direction of the half shaft of the vehicle 1000, the two second inclined surfaces 15 are connected by a second connecting surface 17, the reducer housing 2 also comprises two first inclined surfaces 24 corresponding to the side of the mounting window 11, the two first inclined surfaces 24 are connected by a first connecting surface 25, and the first inclined surface 24 and the first connecting surface 25 of the reducer housing 2 are arc-shaped transition connections. Similarly, the second inclined surface 15 and the second connecting surface 17 of the mounting window 11 are arc-shaped transition connections. When the arc-shaped transition connections are adopted, stress concentration of the mounting window 11 at the transition of the two second inclined surfaces 15 can be prevented, and deformation of the axle housing 1 and the reducer housing 2 can be reduced. Of course, in actual design, arc-shaped transition connections can also not be adopted according to actual conditions.

[0064] Moreover, each first inclined surface 24 of the reducer housing 2 is provided with at least one second fastening strip 4, which can ensure effective cooperation of the second fastening strip 4 with the first inclined surface 24 of the reducer housing 2 and the second inclined surface 15 of the mounting window 11, such as improving the adhesion of the fastening strip 4 with the axle housing 1 or the reducer housing 2, thereby improving the reliability of the connection between the axle housing 1 and the mounting window 11 by the first connecting member 5 and the second connecting member 6.

[0065] In some embodiments, the electric drive axle assembly 100 further comprises a half shaft bushing 13 and a half shaft sleeve 14, both ends of the axle housing 1 are provided with housing ends 12, the reducer housing 2 comprises a mounting hole 23, the outer diameter of the half shaft bushing 13 is smaller than the inner diameter of the housing end 12, and the half shaft bushing 13 penetrates into the mounting hole 23 along the inside of the housing end 12 to be connected with the reducer housing 2, and the other end of the half shaft bushing 13 is sleeved with the half shaft sleeve 14, and the half shaft sleeve 14 is connected with the housing end 12.

[0066] Among them, the half shaft sleeve 14 and the half shaft bushing 13 of the vehicle 1000 play a role in bearing, and they are integrated with the drive axle housing 1, while supporting the frame and the mass of each assembly thereon.

[0067] Specifically, the half shaft bushing 13 is connected at the mounting hole 23 of the reducer housing 2. Of course, in actual operation, the half shaft sleeve 14 and the half shaft bushing 13 can also be made into one body according to the axial size and application requirements, to realize reliable and stable connection with the reducer housing 2 and the end of the axle housing 1.

[0068] In some embodiments, the half shaft sleeve 14 comprises a first pipe section 142 and a second pipe section 141, the outer diameter of the first pipe section 142 is smaller than that of the second pipe section 141, the inner diameter of the first pipe section 142 is larger than the outer diameter of the half shaft liner 13, the first pipe section 142 is sleeved on the end of the half shaft liner 13 and the outer periphery of the first pipe section 142 is in contact with the inner periphery of the housing end 12, and the second pipe section 141 is axially pressed against the housing end 12.

[0069] Referring to FIG. 5, the first pipe section 142 is sleeved on the end of the half shaft liner 13 and the outer periphery of the first pipe section 142 is in contact with the inner periphery of the end of the axle housing 1, and the second pipe section 141 is also axially pressed against the end of the axle housing 1, thereby improving the reliability and sealing performance of the connection between the half shaft liner 13 and the half shaft sleeve 14.

[0070] In some embodiments, the electric drive axle assembly 100 further comprises a first seal 132 and a second seal 131, the two ends of the half shaft liner 13 are respectively provided with a first annular groove 133 and a second annular groove 134, the first annular groove 133 is sleeved with the first seal 132 and the second annular groove 134 is sleeved with the second seal 131, and when the half shaft liner 13 is arranged in the mounting hole 23, the first seal 132 is pressed against the reducer housing 2 and the second seal 131 is pressed against the half shaft sleeve 14.

[0071] Specifically, the first seal 132 is a first O-shaped rubber seal ring and the second seal 131 is a second O-shaped rubber seal ring. Referring to FIG. 5, when one end of the half shaft liner 13 extends into the mounting hole 23 of the reducer housing 2, the first O-shaped rubber seal ring arranged in the circumferential direction of the half shaft liner 13 is pressed against the inner periphery of the mounting hole 23 of the reducer housing 2, thereby preventing the lubricating oil in the reducer housing 2 from flowing out through the gap between the outer periphery of the half shaft liner 13 and the mounting hole 23. Similarly, the outer periphery of the second O-shaped rubber seal ring is pressed against the inner periphery of the first pipe section 142 of the half shaft sleeve 14, thereby sealing the gap between the half shaft liner 13 and the half shaft sleeve 14 and preventing the lubricating oil from flowing out along the gap. It should be noted that the end of the half shaft sleeve 14 away from the one end of the half shaft liner 13 is sealed with the wheel end assembly of the vehicle 1000, thereby ensuring that the connection between the half shaft sleeve 14 and the wheel end assembly has good sealing performance. That is, the leakage of the lubricating oil in the reducer housing 2 is prevented by sealing, and the entry of external water into the reducer housing 2 is also prevented.

[0072] Furthermore, compared with the sealing method of the large-size connection surface between the axle housing 1 and the reducer housing 2 in the prior art, the sealing surface of the first O-shaped rubber seal ring and the second O-shaped rubber seal ring has a small size, is easy to install and has high reliability.

[0073] In some embodiments, the half shaft sleeve 14 is press-bonded with the housing end 12.

[0074] Firstly, the crimping is a fixed connection mode, which has high flexibility, is environment-friendly, and is convenient and fast to operate. The crimping of the half shaft sleeve 14 housing end portion 12 can ensure better connection between the inner periphery of the half shaft sleeve 14 housing end portion 12.

[0075] In some embodiments, the reducer housing 2 is arranged in one piece along the first direction, and the reducer housing 2 can be arranged in detachable connection along the direction parallel to the half shaft of the vehicle 1000.

[0076] Referring to FIG. 3, the reducer housing 2 is provided with a double motor 3, and has an axis parallel to the half shaft of the vehicle 1000, which is not drawn. Assuming that the reducer housing 2 is divided into two parts along the first direction, and the joint surface of the reducer housing 2 is parallel to the axis parallel to the half shaft of the vehicle 1000, the axis generates a radial force on the reducer housing during transmission. In the case of high load, the radial force of the axis is large, and the reducer housing 2 may not maintain the initial state and be deformed, thereby causing the gear meshing state to change, resulting in strength, service life, reliability, and NVH problems.

[0077] The embodiment of the present application arranges the reducer housing 2 in one piece along the first direction, that is, perpendicular to the axial direction of the half shaft sleeve 14, which is equivalent to arranging the reducer housing 2 in one piece along the front-rear direction of the vehicle 1000. This can avoid the adverse effects of the radial force of the axis in the reducer housing 2 on the axle housing 1 and the reducer housing 2, such as causing the reducer housing 2 to deform. The reducer housing 2 can be arranged in detachable connection along the direction parallel to the half shaft of the vehicle 1000, which can facilitate the disassembly and maintenance of the interior of the reducer housing 2, while ensuring that the axis in the interior of the reducer housing 2 does not affect the deformation of the reducer housing 2 during transmission.

[0078] In addition, the double motor 3 and the reducer housing 2 of the embodiment of the present application share a shell, have fewer parts, and have a simple structure.

[0079] In some embodiments, the reducer housing 2 is arranged equally on both sides of the axle housing 1 in the first direction.

[0080] In practice, equal can be understood as equal in size and equal in weight. For example, the distance from one side of the axle housing 1 along the first direction to one end of the reducer housing 2 is equal to the distance from the other side of the axle housing 1 to the other end of the reducer housing 2. At this time, the reducer housing 2 and the axle housing 1 can be installed more evenly under stress, the stability is enhanced, and the risk of deformation of the reducer housing 2 is reduced.

[0081] In some embodiments, a gap is left between the axle housing 1 and the reducer housing 2.

[0082] In practice, due to the gap between the axle housing 1 and the reducer housing 2, the force transmitted to the reducer housing 2 when the axle housing 1 deforms can be reduced, and thus the deformation of the reducer housing 2 caused by the deformation of the axle housing 1 can be reduced, thereby reducing the problem of fastening failure caused by the relative deviation of the joint surface between the axle housing 1 and the reducer housing 2.

[0083] In some embodiments, the axle housing 1 further comprises a drainage port 112 adapted to drain water when the water from the external environment enters the gap between the axle housing 1 and the reducer housing 2.

[0084] Firstly, the gap is provided between the axle housing 1 and the outer side of the reducer housing 2, and in combination with the indirect connection between the reducer housing 2 and the axle housing 1 through the fastening strip 4, when the axle housing 1 deforms, the risk of the deformation of the reducer housing 2 caused by the axle housing 1 is reduced, and the initial fitting relationship between the parts inside the reducer housing 2 can be effectively maintained without change, and the structure between the reducer housing 2 and the axle housing 1 is independent, which is beneficial to maintaining good reliability and NVH performance of the electric drive system.

[0085] Moreover, the large-size fitting is provided between the axle housing 1 and the reducer housing 2, and no sealing is required, which reduces the risk of sealing failure and the installation difficulty; when the water from the external environment or the water from the water-involved road section enters the gap between the axle housing 1 and the reducer housing 2, the drainage port 112 is provided at the bottom of the installation window 11 of the axle housing 1, and the water between the axle housing 1 and the reducer housing 2 can be drained in time through the drainage port 112.

[0086] The embodiment of the application further discloses a vehicle 1000 comprising the electric drive axle assembly 100 described above, and the fastening strip 4 is used to connect the reducer housing 2 and the axle housing 1 in different directions, which improves the reliability of the connection between the reducer housing 2 and the axle housing 1, reduces the problem of easy loosening under alternating load, thereby preventing the parts inside the reducer housing 2 from being affected and ensuring that the reducer maintains good performance.

[0087] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description 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.

[0088] Although the embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

[0089] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0090] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0091] In the description of the present application, "a plurality of" means two or more.

[0092] In the description of the present application, "above" or "below" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0093] In the description of the present application, "above", "over" and "on" the first feature of the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0094] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean 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.

[0095] Although the embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric drive axle assembly (100), wherein, The application relates to a bridge housing (1) provided with a mounting channel (16) penetrating in a first direction; a reducer box (2) mounted in the mounting channel (16) in the first direction; and a fastening strip (4) mounted outside the reducer box (2), the fastening strip (4), the bridge housing (1) and the reducer box (2) being connected through first connecting members (5) penetrating in the first direction, and the fastening strip (4) and the reducer box (2) being connected through second connecting members (6) penetrating in a second direction. The bridge housing (1) is provided with a mounting window (11), the mounting channel (16) is formed in the mounting window (11), the outer peripheral wall of the reducer box (2) is provided with a mounting flange (21), the fastening strip (4) is located on both sides of the mounting window (11) with the mounting flange (21), and the first connecting members (5) penetrate the mounting flange (21), the mounting window (11) and the fastening strip (4) in sequence. The outer periphery of the reducer box (2) comprises a first mounting portion (22) arranged in a circumferential direction, the fastening strip (4) is arranged on the first mounting portion (22) and connected with the first mounting portion (22) through the second connecting members (6) to be connected with the reducer box (2). The fastening strip (4) comprises a plurality of first connecting holes (41) and second connecting holes (42) arranged at intervals, the first connecting holes (41) penetrate in the first direction, the second connecting holes (42) penetrate in the second direction, and the first connecting members (5) and the second connecting members (6) are a plurality of, each first connecting member (5) penetrates a corresponding first connecting hole (41) to be connected with the bridge housing (1) and the reducer box (2), and each second connecting member (6) penetrates a corresponding second connecting hole (42) to be connected with the reducer box (2).

2. The electric drive axle assembly (100) of claim 1, wherein, The fastening strip (4) is provided with recesses (43) and protrusions (44) arranged at intervals in the length direction, the first connecting holes (41) are arranged at the protrusions (44) in the first direction, and the second connecting holes (42) penetrate at the recesses (43) in the second direction.

3. The electric drive axle assembly (100) of claim 2, wherein, The fastening strip (4) is a plurality of, part of the fastening strips (4) in the plurality of fastening strips (4) are located at the top and bottom of the reducer box (2), and the other part of the fastening strips (4) are located at the side of the reducer box (2), the plurality of fastening strips (4) are connected with the bridge housing (1) and the reducer box (2) in the first direction, and are also connected with the reducer box (2) in the second direction.

4. The electric drive axle assembly (100) of claim 3, wherein, The bottom surface shape of the fastening strip (4) is matched with the shape of the outer surface of the reducer box (2) at the corresponding position.

5. The electric drive axle assembly (100) of claim 4, wherein, The side of the reducer box (2) comprises two first inclined surfaces (24) located on both sides of the central axis of the bridge housing (1) in the axial direction, and each first inclined surface (24) is provided with at least one fastening strip (4).

6. The electric drive axle assembly (100) of any one of claims 1-5, wherein, ​ 7. The electric drive axle assembly (100) of any one of claims 1-6, wherein, ​ 8. The electric drive axle assembly (100) of any one of claims 1-7, wherein, ​ 9. The electric drive axle assembly (100) of any one of claims 1-8, wherein, The axle housing (1) is provided with housing ends (12) at both ends, the reducer housing (2) comprises mounting holes (23), the outer diameter of the half shaft bushing (13) is smaller than the inner diameter of the housing end (12) and penetrates into the mounting hole (23) along the inside of the housing end (12) to be connected with the reducer housing (2), and the other end of the half shaft bushing (13) is sleeved with the half shaft sleeve (14), and the half shaft sleeve (14) is connected with the housing end (12).

10. The electric drive axle assembly (100) of claim 9, wherein, The half shaft sleeve (14) comprises a first pipe section (142) and a second pipe section (141), the outer diameter of the first pipe section (142) is smaller than the outer diameter of the second pipe section (141), the inner diameter of the first pipe section (142) is greater than the outer diameter of the half shaft bushing (13) and is sleeved at the end of the half shaft bushing (13) and the outer periphery is in contact with the inner periphery of the housing end (12), and the second pipe section (141) is axially abutted with the housing end (12).

11. The electric drive axle assembly (100) of claim 10, wherein, The first seal (132) and the second seal (131) are further included, the outer periphery of both ends of the half shaft bushing (13) is respectively provided with a first ring groove (133) and a second ring groove (134), the first ring groove (133) is sleeved with the first seal (132), the second ring groove (134) is sleeved with the second seal (131), the first seal (132) is abutted with the reducer housing (2) and the second seal (131) is abutted with the half shaft sleeve (14).

12. The electric drive axle assembly (100) of any one of claims 10-11, wherein, The half shaft sleeve (14) is press-bonded with the housing end (12).

13. The electric drive axle assembly (100) of any one of claims 1-12, wherein, The reducer housing (2) is integrally formed along the first direction, and the reducer housing (2) is detachably connected along the direction parallel to the vehicle half shaft.

14. The electric drive axle assembly (100) of any one of claims 1-13, wherein, The reducer housing (2) is equally arranged on both sides of the first direction of the axle housing (1).

15. The electric drive axle assembly (100) of any one of claims 1-14, wherein, A gap is left between the axle housing (1) and the reducer housing (2).

16. The electric drive axle assembly (100) of claim 15, wherein, The axle housing (1) further comprises a drainage port (112) adapted to drain water when the water of the external environment enters the gap.

17. A vehicle, wherein, The electric drive axle assembly (100) of any one of claims 1-16 is included.

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