Electric drive axle assembly and vehicle

Abstract

The utility model relates to the technical field of electric drive axles, and discloses an electric drive axle assembly and a vehicle, the electric drive axle assembly comprises a drive motor and a speed reducer, in the first direction, the drive motor comprises a motor shell and a motor front end cover which are connected in sequence, the speed reducer comprises a flange plate and a speed reducer shell body, and the flange plate and the motor front end cover are assembled in a matched mode; the driving motor further comprises a first connecting part, the first connecting part is provided with a first end and a second end in the radial direction of the motor front end cover, the first end is connected with the first shielding area, the speed reducer further comprises a second connecting part, the second connecting part is provided with a third end and a fourth end in the radial direction of the flange plate, and the third end is connected with the second shielding area. The projection of the second end and the projection of the fourth end are not overlapped with the projection of the speed reducer shell body, the second end and the fourth end are oppositely arranged and fixedly connected through a fastener, the risk of opening and closing deformation of the front end cover of the motor and the flange plate is reduced, and the vibration resistance and the NVH performance of the motor are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric drive axle, and particularly relates to an electric drive axle assembly and a vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicles, the anti-vibration performance and NVH performance of the electric motor are paid more and more attention.

[0003] In the related art, the electric motor is usually assembled with the reducer on the rear axle, wherein the motor shell is fixedly connected with the flange plate of the reducer through the motor front end cover. However, since the motor front end cover and the flange plate are partially shielded by the reducer shell body, the shielding area cannot be fixed by means of bolting, and thus the motor front end cover and the flange plate in the shielding area have a risk of opening and closing deformation during the driving of the vehicle, thereby affecting the anti-vibration performance and NVH performance of the electric motor. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an electric drive axle assembly, which solves the problem that the motor front end cover and the flange plate in the shielding area cannot be fixedly connected, reduces the risk of opening and closing deformation of the motor front end cover and the flange plate in the shielding area, and improves the anti-vibration performance and NVH performance of the electric motor.

[0005] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present application comprises:

[0006] In a first aspect, the present application provides an electric drive axle assembly, comprising: a drive motor and a reducer, along a first direction, the drive motor comprising a motor shell and a motor front end cover connected in sequence, the reducer comprising a flange plate and a reducer shell body connected in sequence, the flange plate being assembled with the motor front end cover, the motor front end cover comprising a first shielding area and a first non-shielding area, the flange plate comprising a second shielding area and a second non-shielding area, along the first direction, the projection of the first shielding area and the projection of the second shielding area overlapping the projection of the reducer shell body, the projection of the first non-shielding area and the projection of the second non-shielding area not overlapping the projection of the reducer shell body;

[0007] The drive motor further comprises a first connecting portion, along the radial direction of the motor front end cover, the first connecting portion having a first end and a second end, the first end being connected with the first shielding area, and the second end extending in a direction away from the motor front end cover;

[0008] The speed reducer further comprises a second connecting portion in the radial direction of the flange plate, the second connecting portion having a third end and a fourth end, the third end being connected with the second shielding area, and the fourth end extending in the first direction and away from the flange plate, the projection of the second end and the projection of the fourth end both not overlapping with the projection of the speed reducer housing body, and the second end and the fourth end being oppositely arranged and fixedly connected by the fastener.

[0009] In the process of assembling the motor front end cover and the flange plate, the second end of the first connecting portion and the fourth end of the second connecting portion are connected by the fastener, which is equivalent to providing additional fixed mounting points outside the shielding area of the motor front end cover and the flange plate by the speed reducer housing body in the first direction. This not only facilitates installation, but also realizes the fixed connection of the motor front end cover and the flange plate in the shielding area of the speed reducer housing body, reduces the risk of opening and deformation of the motor front end cover and the flange plate in the shielding area, improves the anti-vibration performance of the motor, and improves the NVH performance of the motor.

[0010] Optionally, the first connecting portion is a plurality of first connecting portions, and the plurality of first connecting portions are arranged at intervals in the circumferential direction of the motor front end cover.

[0011] The second connecting portion is a plurality of second connecting portions, and the plurality of second connecting portions are arranged at intervals in the circumferential direction of the flange plate, and the plurality of first connecting portions correspond to the plurality of second connecting portions one by one.

[0012] Therefore, a plurality of pairs of additional fixed mounting points are provided outside the shielding area of the motor front end cover and the flange plate, which expands the circumferential degree of bolt connection and is conducive to further improving the connection strength of the motor front end cover and the flange plate in the shielding area.

[0013] Optionally, the first connecting portion is provided with a first weight-reducing groove.

[0014] By providing the first weight-reducing groove, the weight of the first connecting portion is reduced, and the overall weight of the motor is reduced, so as to meet the lightweight design requirement.

[0015] Optionally, the first weight-reducing groove is provided with a first reinforcing rib, and the first reinforcing rib is adapted to divide the first weight-reducing groove into a plurality of first sub-weight-reducing grooves.

[0016] By providing the first reinforcing rib in the first weight-reducing groove, the strength of the first connecting portion can be improved, so as to balance the lightweight and strength.

[0017] Optionally, in the first direction, the motor front end cover has a first end face, and the flange plate has a second end face oppositely arranged with the first end face.

[0018] The first end face is provided with a first positioning portion, and the second end face is provided with a second positioning portion corresponding to the first positioning portion, and the first positioning portion is adapted to be positioned and matched with the second positioning portion.

[0019] Since the first positioning part and the second positioning part are positioned along the axial direction of the motor front end cover, the coaxiality of the motor front end cover and the flange plate is improved, and the coaxiality of the motor and the speed reducer is improved.

[0020] Optionally, the first positioning part is configured as one of a positioning hole and a positioning pin, the second positioning part is configured as the other of the positioning hole and the positioning pin, and the positioning pin is adapted to be inserted into the positioning hole.

[0021] When the motor front end cover and the flange plate are assembled, each positioning pin is inserted into the corresponding positioning hole, which not only improves the coaxiality of the motor front end cover and the flange plate during assembly, but also has a simple and reliable assembly method, and the positioning pin and the positioning hole are easy to process and low in cost.

[0022] Optionally, the driving motor further comprises a first stop, the first stop extends along the first direction and is arranged on the first end face, the first stop is a plurality of, and the plurality of first stops are arranged along the radial direction of the motor front end cover;

[0023] The flange plate further comprises a second stop, the second stop extends along the first direction and is arranged on the second end face, the second stop is a plurality of, and the plurality of second stops are arranged along the radial direction of the flange plate;

[0024] Among them, the plurality of first stops and the plurality of second stops correspond one by one, and each first stop and the corresponding second stop form a stop insertion assembly.

[0025] Through the stop insertion assembly between the plurality of first stops and the corresponding second stops, another positioning and matching mode is provided, which can further improve the positioning accuracy between the motor front end cover and the flange plate, that is, it is beneficial to further improve the coaxiality of the motor front end cover and the flange plate during assembly.

[0026] Optionally, the plurality of first stops comprises a first convex stop and a first concave stop, along the radial direction of the motor front end cover, the size of the first convex stop is smaller than that of the first concave stop;

[0027] The plurality of second stops comprises a second concave stop corresponding to the first convex stop and a second convex stop corresponding to the first concave stop, the first convex stop and the second concave stop surround the motor output shaft of the driving motor, and the first concave stop is arranged on the outer circumferential edge of the first end face. The second convex stop is arranged on the outer circumferential edge of the flange plate.

[0028] Through the mutual insertion and matching of the first convex stop and the second concave stop and the second convex stop and the first concave stop, not only the coaxiality of the motor front end cover and the flange plate during assembly is improved, but also the connection strength of the motor front end cover and the flange plate is improved.

[0029] Optionally, the sealing member is further included, and an outer side wall of the first convex stopper is provided with a sealing groove which is circumferentially arranged around the first convex stopper, and the sealing member is arranged in the sealing groove.

[0030] By arranging the sealing member, the sealing performance between the motor and the reducer is improved.

[0031] In a second aspect, the embodiments of the present application provide a vehicle comprising the electric drive axle assembly in the first aspect.

[0032] The vehicle provided by the second aspect of the present application is provided with the electric drive axle assembly, and the second end of the first connecting part and the fourth end of the second connecting part are connected through the fastener during the cooperation and assembly of the motor front end cover and the flange plate, which is equivalent to providing an additional fixed mounting point outside the area blocked by the reducer housing body along the first direction of the motor front end cover and the flange plate. Not only is the installation convenient, but also the fixed connection of the motor front end cover and the flange plate in the blocked area by the reducer housing body is achieved, the risk of opening and closing deformation of the motor front end cover and the flange plate in the blocked area is reduced, the vibration resistance of the motor is improved, and the NVH performance of the motor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The assembly schematic diagram of the motor and the reducer provided by the embodiments of the present application is shown in the figure;

[0035] Figure 2 The assembly front view of the motor and the reducer provided by the embodiments of the present application is shown in the figure;

[0036] Figure 3 The first perspective view of the motor and the reducer provided by the embodiments of the present application is shown in the figure when disassembled;

[0037] Figure 4 The second perspective view of the motor and the reducer provided by the embodiments of the present application is shown in the figure when disassembled;

[0038] Figure 5 The perspective view of the motor front end cover provided by the embodiments of the present application is shown in the figure;

[0039] Figure 6 The front view of the motor front end cover provided by the embodiments of the present application is shown in the figure.

[0040]

Explanation of reference signs

[0041] Electric drive axle assembly 1000;

[0042] Drive motor 100; motor front end cover 1; motor housing 10; first connecting part 11; first connecting hole 111; first lightening groove 112; first end 113; second end 114; first reinforcing rib 12; first end face 13; first positioning part 131; first stop 132; second lightening groove 133; second reinforcing rib 14; first mounting hole 15; motor output shaft 101;

[0043] Reduction gear 200; reduction gear housing body 2; flange plate 20; second connecting part 21; second connecting hole 211; third end 212; fourth end 213; second end face 22; second positioning part 221; second stop 222; bolt mountable area 23; bolt hole 231; reduction gear input shaft 201

[0044] Seal 3;

[0045] First direction X. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as those commonly understood by one of ordinary skill in the art to which this application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0048] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0049] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of 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.

[0050] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0051] "Multiple" appearing in the present application means more than two (including two), and similarly, "multiple groups" means more than two groups (including two groups), and "multiple pieces" means more than two pieces (including two pieces).

[0052] It should be noted that, with the rapid development of new energy vehicles, the anti-vibration performance and NVH performance of the drive motor 100 are increasingly valued by people.

[0053] In the related art, different types of new energy vehicle drive motors 100 have different mounting methods, for example, a new energy passenger vehicle drive motor 100 is usually mounted in the front compartment, mainly using a suspension structure to mount the drive motor 100 on the subframe, so that the impact load transmitted from the vehicle half shaft to the drive motor 100 can be well alleviated through the suspension structure, thereby providing better protection for the drive motor 100, and also helping to reduce the vibration and noise of the drive motor 100. However, for new energy commercial vehicles, since more emphasis is placed on carrying performance, the drive motor 100 of the new energy commercial vehicle is usually mounted on the rear axle of the whole vehicle, specifically, the drive motor 100 is fixedly connected with the reducer 200 on the rear axle, wherein the motor housing 10 is fixed with the flange plate 20 of the reducer 200 through the motor front end cover 1. It should be noted that the reducer 200 is composed of the fixedly connected flange plate 20 and reducer housing body 2, and the flange plate 20 is used for cooperating with the motor front end cover 1 for assembly, as shown in Figure 2 In the current assembly process, since the normal projection of the reducer housing body 2 towards the motor front end cover 1 direction will block the motor front end cover 1 and the flange plate 20, the motor front end cover 1 and the flange plate 20 cannot be fixed by bolting and the like in these blocked areas, and can only be fixedly connected in the non-blocked areas, for example, as shown in Figure 2 and Figure 4As shown, the non-occluded area is provided with a bolt-mountable area 23, and the bolt-mountable area 23 is provided with a plurality of bolt holes 231, so that the flange plate 20 and the motor front end cover 1 of the non-occluded area can be fixedly connected by bolting, but for the occluded area, since the motor front end cover 1 and the flange plate 20 cannot be bolted, therefore, during the driving process of the whole vehicle, the motor front end cover 1 and the flange plate 20 of these occluded areas are prone to open and close deformation, thereby greatly affecting the anti-vibration performance and NVH performance of the drive motor 100.

[0054] It should be noted that the existing solutions include arranging more connecting bolts in the non-occluded area as much as possible, or adopting a reducer 200 and drive motor 100 integrated shell design scheme, but the former still cannot improve the problem that the motor front end cover 1 and the flange plate 20 of the occluded area cannot be connected, and the latter can improve the connection strength of the motor front end cover 1 and the flange plate 20, but also leads to an increase in the weight of the drive motor 100, which is not conducive to the overall NVH performance of the drive motor 100.

[0055] Based on this, the present application proposes an electric drive axle assembly 1000, in which the second end 114 of the first connecting part 11 and the fourth end 213 of the second connecting part 21 are connected by a fastener during the cooperation and assembly of the motor front end cover 1 and the flange plate 20, which is equivalent to providing an additional fixed mounting point outside the occluded area of the motor front end cover 1 and the flange plate 20 along the first direction X by the reducer shell body 2, which not only facilitates installation, but also realizes the fixed connection of the motor front end cover 1 and the flange plate 20 in the occluded area of the reducer shell body 2, reduces the risk of open and close deformation of the motor front end cover 1 and the flange plate 20 in the occluded area, and improves the anti-vibration performance and NVH performance of the drive motor 100.

[0056] The electric drive axle assembly 1000 proposed by the embodiments of the present application will be described below with reference to the accompanying drawings.

[0057] As Figures 1-5 shown, the electric drive axle assembly 1000 according to the first aspect of the present application comprises:

[0058] The drive motor 100 and the speed reducer 200 drive the motor 100 in the first direction X, which includes a motor housing 10 and a motor front end cover 1 connected in sequence, and the speed reducer 200 includes a flange plate 20 and a speed reducer housing body 2 connected in sequence, the flange plate 20 is assembled with the motor front end cover 1, the motor front end cover 1 includes a first shielding area and a first non-shielding area, the flange plate 20 includes a second shielding area and a second non-shielding area, along the first direction X, the projection of the first shielding area and the projection of the second shielding area overlap the projection of the speed reducer housing body 2, the projection of the first non-shielding area and the projection of the second non-shielding area do not overlap the projection of the speed reducer housing body 2, the drive motor 100 further includes a first connecting portion 11, along the radial direction of the motor front end cover 1, the first connecting portion 11 has a first end 113 and a second end 114, the first end 113 is connected with the first shielding area, the second end 114 extends in a direction away from the motor front end cover 1, the speed reducer 200 further includes a second connecting portion 21, along the radial direction of the flange plate 20, the second connecting portion 21 has a third end 212 and a fourth end 213, the third end 212 is connected with the second shielding area, the fourth end 213 extends in a direction away from the flange plate 20, along the first direction X, the projection of the second end 114 and the projection of the fourth end 213 do not overlap the projection of the speed reducer housing body 2, the second end 114 and the fourth end 213 are oppositely arranged and fixedly connected by a fastener.

[0059] Specifically, the new energy commercial vehicle is taken as an example for illustration, the electric drive axle assembly 1000 includes a drive motor 100 and a speed reducer 200, the drive motor 100 is indirectly fixed on the rear axle of the vehicle through the speed reducer 200, wherein the connection between the drive motor 100 and the speed reducer 200 includes two parts, one part is that the motor housing 10 is fixedly connected with the flange plate 20 of the speed reducer 200 through the motor front end cover 1, the other part is that the motor output shaft 101 is fixedly connected with the speed reducer input shaft 201, as shown in Figure 5 and Figure 6 The motor front end cover 1 is provided with a first mounting hole 15, and the motor output shaft 101 extends out of the first mounting hole, it can be understood that the flange plate 20 of the speed reducer 200 is provided with a second mounting hole opposite to the first mounting hole, so that the speed reducer input shaft 201 can extend out of the second mounting hole and be connected with the motor output shaft 101.

[0060] During the assembly of the flange plate 20 and the motor front end cover 1, along the first direction X, the speed reducer housing body 2 is located on the side of the flange plate 20 away from the motor front end cover 1, in combination with Figure 3 and Figure 4 It is shown that the speed reducer housing body 2 is located on the right side of the flange plate 20, and the flange plate 20 is assembled with the motor front end cover 1 on the left side, as shown in Figures 2-4As shown, the motor front end cover 1 and the flange plate 20 are both circular structures, and when the reducer housing body 2 is projected along the first direction X towards the motor front end cover 1 and the flange plate 20, the reducer housing body 2 will partially block the motor front end cover 1 and the flange plate 20, that is, the reducer housing body 2 forms a first blocking area on the motor front end cover 1 and a second blocking area on the flange plate 20, and further referring to Figure 2 As shown, since the reducer housing body 2 does not completely block the motor front end cover 1 and the flange plate 20, the motor front end cover 1 further includes a first non-blocking area, and the flange plate further includes a second non-blocking area, and an arc-shaped bolt mountable area 23 can be arranged in these non-blocking areas, and a plurality of bolt holes 231 are arranged in the bolt mountable area 23, and the motor front end cover 1 and the flange plate 20 in the non-blocking area can be connected by bolting, but for the blocking area, the motor front end cover 1 and the flange plate 20 cannot be fixedly connected by bolting.

[0061] In some embodiments of the present application, the driving motor 100 further includes a first connecting portion 11, which has a first end 113 and a second end 114 along the radial direction of the motor front end cover 1, wherein the first end 113 is connected with the first blocking area, and the second end 114 extends away from the motor front end cover 1 and the projection of the second end 114 along the first direction X does not overlap with the projection of the reducer housing body 2, so that the second end 114 of the first connecting portion 11 can extend out of the first blocking area, that is, the second end 114 of the first connecting portion 11 is not blocked by the reducer housing body 2, that is, the motor front end cover 1 can form an additional mounting point outside the first blocking area.

[0062] Further, the reducer 200 further includes a second connecting portion 21, which has a third end 212 and a fourth end 213 along the radial direction of the flange plate 20, wherein the third end 212 is connected with the second blocking area, and the fourth end 213 extends away from the flange plate 20 and the projection of the fourth end 213 along the first direction X does not overlap with the projection of the reducer housing body 2, so that the fourth end 213 of the second connecting portion 21 can extend out of the second blocking area, that is, the fourth end 213 of the second connecting portion 21 is not blocked by the reducer housing body 2, that is, the flange plate 20 can form an additional mounting point outside the first blocking area.

[0063] Further, the second connecting part 21 is also arranged opposite to the first connecting part 11, for example, the first connecting part 11 is arranged at the position of the motor front end cover 1, and the second connecting part 21 is arranged at the position of the flange plate 20, so as to ensure that the first connecting part 11 is opposite to the second connecting part 21, and optionally, the second end 114 of the first connecting part 11 is provided with a first connecting hole 111, and the fourth end 213 of the second connecting part 21 is provided with a second connecting hole 211 opposite to the first connecting hole 111, so that in the process of assembling the motor front end cover 1 and the flange plate 20, for the motor front end cover 1 and the flange plate 20 in the non-shielding area, the motor front end cover 1 and the flange plate 20 in the non-shielding area can be fixedly connected by means of bolting, and for the motor front end cover 1 and the flange plate 20 in the shielding area of the reducer housing body 2, the first connecting part 11 and the second connecting part 21 are connected by means of fasteners.

[0064] In some embodiments of the present application, the fastener can be a connecting bolt, and the connecting bolt is sequentially screwed with the first connecting hole 111 and the second connecting hole 211, so as to fix the first connecting part 11 and the second connecting part 21, and further fix the motor front end cover 1 and the flange plate 20 in the shielding area of the reducer housing body 2, which is simple and convenient to install, and is beneficial to reduce the risk of opening and deforming of the motor front end cover 1 and the flange plate 20 in the shielding area of the reducer housing body 2, and improve the anti-vibration performance and NVH performance of the driving motor 100.

[0065] It should be noted that for the connection of the motor front end cover 1 and the flange plate 20 in the shielding area of the reducer housing body 2, due to the shielding of the reducer housing body 2, the tightening direction of the connecting bolt and the first connecting hole 111 and the second connecting hole 211 needs to be opposite to the tightening direction of the bolt in the non-shielding area of the motor front end cover 1 and the flange plate 20.

[0066] In some embodiments of the present application, along the radial direction of the motor front end cover 1, the second end 114 of the first connecting part 11 extends away from the motor front end cover 1, and it can be understood that the first connecting part 11 can form an angle of 90° with the normal direction of the motor front end cover 1, or an angle slightly larger than 90° or smaller than 90°, which is specifically set according to the actual situation, and is not limited here.

[0067] Further, continuing to refer to Figure 3 and Figure 4As shown, the fourth end 213 of the second connecting part 21 extends in a direction away from the flange plate 20 in the radial direction of the flange plate 20, and it can be understood that the second connecting part 21 can form an angle of 90° with the normal direction of the flange plate 20, or an angle slightly greater than or less than 90°, which is specifically set according to the actual situation and is not specifically limited here, but the consistency of the extension direction of the second connecting part 21 and the extension direction of the first connecting part 11 should be ensured to avoid the situation that the first connecting part 11 and the second connecting part 21 cannot be assembled.

[0068] In summary, according to the electric drive axle assembly 1000 of the first aspect of the present application, in the process of assembling the motor front end cover 1 and the flange plate 20, the second end 114 of the first connecting part 11 and the fourth end 213 of the second connecting part 21 are connected by a fastener, which is equivalent to providing an additional fixed mounting point outside the area blocked by the reducer housing body 2 in the first direction X of the motor front end cover 1 and the flange plate 20. Not only is it convenient to install, but also the motor front end cover 1 and the flange plate 20 are fixedly connected in the blocked area of the reducer housing body 2, reducing the risk of opening and closing deformation of the motor front end cover 1 and the flange plate 20 in the blocked area, improving the anti-vibration performance of the drive motor 100 and improving the NVH performance of the drive motor 100.

[0069] In some embodiments of the present application, as shown in Figures 3-6 The first connecting part 11 is a plurality of first connecting parts 11, and the plurality of first connecting parts 11 are arranged at intervals in the circumferential direction of the motor front end cover 1. The second connecting part 21 is a plurality of second connecting parts 21, and the plurality of second connecting parts 21 are arranged at intervals in the circumferential direction of the flange plate 20. The plurality of first connecting parts 11 correspond one-to-one to the plurality of second connecting parts 21.

[0070] Specifically, a plurality of first connecting parts 11 can be arranged in the first blocked area of the motor front end cover 1 by the reducer housing body 2, for example, the number of first connecting parts 11 can be 2, 3, 4, 5, and the specific number is set according to the actual reserved installation space. Further, the plurality of first connecting parts 11 are arranged at intervals in the circumferential direction of the motor front end cover 1. It can be understood that the first connecting part 11 can be uniformly or non-uniformly arranged at intervals in the circumferential direction of the motor front end cover 1.

[0071] Similarly, a plurality of second connecting parts 21 can be arranged in the second blocked area of the flange plate 20 by the reducer housing body 2, for example, the number of second connecting parts 21 can be 2, 3, 4, 5, and the specific number is set according to the actual reserved installation space. Further, the plurality of second connecting parts 21 are arranged at intervals in the circumferential direction of the flange plate 20. It can be understood that the second connecting part 21 can be uniformly or non-uniformly arranged at intervals in the circumferential direction of the flange plate 20.

[0072] It should be noted that the plurality of first connecting portions 11 and the plurality of second connecting portions 21 are one-to-one correspondence, and it can be understood that the plurality of first connecting portions 11 and the plurality of second connecting portions 21 are one-to-one correspondence includes two meanings, first, the number of first connecting portions 11 is consistent with the number of second connecting portions 21, for example, if the motor front end cover 1 is provided with three first connecting portions 11, the flange plate 20 is provided with three first connecting portions 11, and second, the position and extension direction of each first connecting portion 11 are consistent with the position and extension direction of the corresponding second connecting portion 21, so that the fixed connection between each first connecting portion 11 and the corresponding second connecting portion 21 is ensured.

[0073] As a specific example, as shown in Figure 3 and Figure 4 , the motor front end cover 1 is provided with two first connecting portions 11, and the flange plate 20 is provided with two second connecting portions 21, and the position and protruding direction of each first connecting portion 11 are consistent with the position and protruding direction of the corresponding second connecting portion 21, and during the cooperation and assembly of the motor front end cover 1 and the flange plate 20, the two second connecting portions 21 on the flange plate 20 are respectively opposite to the two first connecting portions 11 on the motor front end cover 1, and then the fasteners are used to fixedly connect the two pairs of first connecting portions 11 and second connecting portions 21, thereby providing a plurality of additional fixed mounting points outside the first shielding area of the motor front end cover 1 and the second shielding area of the flange plate 20, expanding the circumference of the bolt connection, and facilitating further improving the connection strength of the motor front end cover 1 and the flange plate 20 in the shielding area.

[0074] In some embodiments of the present application, as shown in Figure 5 and Figure 6 , the first connecting portion 11 is provided with a first weight reduction groove 112.

[0075] Specifically, since the first connecting portion 11 improves the overall weight of the driving motor 100, the first weight reduction groove 112 can be arranged in the non-connecting area under the condition of meeting the use requirements of the first connecting portion 11, wherein the first weight reduction groove 112 is recessed towards the first connecting portion 11 along the first direction X, so that the weight of the first connecting portion 11 is reduced, and the overall weight of the driving motor 100 is reduced, so as to meet the lightweight design requirements.

[0076] It should be noted that the weight reduction groove can also be arranged in the non-connecting area of the second connecting portion 21, which will not be described here.

[0077] In some embodiments of the present application, as shown in Figure 5 and Figure 6 , the first weight reduction groove 112 is provided with a first reinforcing rib 12, and the first reinforcing rib 12 is adapted to divide the first weight reduction groove 112 into a plurality of first sub-weight reduction grooves.

[0078] Specifically, the design of the first lightening groove 112 on the first connecting portion 11 inevitably reduces the strength of the first connecting portion 11, in order to achieve the balance between light weight and strength, a first reinforcing rib 12 can be arranged in the first lightening groove 112, both ends of the first reinforcing rib 12 are fixedly connected with the inner side wall of the first lightening groove 112, the number of the first reinforcing rib 12 can be one or multiple, the first lightening groove 112 can be divided into multiple first sub-lightening grooves through the first reinforcing rib 12, and the multiple first sub-lightening grooves are beneficial to further improve the strength of the first connecting portion 11.

[0079] In some embodiments of the present application, as shown in Figures 3-5 the axial direction of the motor front end cover 1, the motor front end cover 1 has a first end face 13, the flange plate 20 has a second end face 22 arranged opposite to the first end face 13, the first end face 13 is provided with a first positioning portion 131, and the second end face 22 is provided with a second positioning portion 221 corresponding to the first positioning portion 131, and the first positioning portion 131 is adapted to be positioned and matched with the second positioning portion 221.

[0080] Specifically, along the axial direction of the motor front end cover 1, the first end face 13 of the motor front end cover 1 is arranged opposite to the second end face 22 of the flange plate 20, wherein the first end face 13 and the second end face 22 are both perpendicular to the axial direction of the motor front end cover 1, that is, the first end face 13 and the second end face 22 are both perpendicular faces arranged opposite to each other, further, the first end face 13 is provided with the first positioning portion 131, and the second end face 22 is provided with the second positioning portion 221 corresponding to the first positioning portion 131, when the motor front end cover 1 and the flange plate 20 are assembled, the motor front end cover 1 is arranged to approach the flange plate 20 along the axial direction of the motor front end cover 1, and the first positioning portion 131 on the first end face 13 is positioned and matched with the second positioning portion 221 on the second end face 22, in this way, since the first positioning portion 131 and the second positioning portion 221 are both positioned along the axial direction of the motor front end cover 1, the coaxiality of the motor front end cover 1 and the flange plate 20 is improved, and the coaxiality of the driving motor 100 and the speed reducer 200 is further improved.

[0081] In some embodiments of the present application, as shown in Figures 3-5 the first positioning portion 131 is configured as one of a positioning hole or a positioning pin, the second positioning portion 221 is configured as the other one of the positioning hole or the positioning pin, and the positioning pin is adapted to be inserted into the positioning hole.

[0082] Specifically, if the first positioning part 131 on the first end surface 13 is configured as a positioning pin, the second positioning part 221 on the second end surface 22 is correspondingly configured as a positioning hole, and vice versa. As a specific example, as shown in Figs. 1 and 2, the first end surface 13 is provided with two positioning holes extending in the axial direction of the motor front cover 1, and the second end surface 22 is correspondingly provided with two positioning pins extending in the axial direction of the motor front cover 1. When the motor front cover 1 is assembled with the flange plate 20, each positioning pin is inserted into the corresponding positioning hole. This not only improves the coaxiality of the motor front cover 1 and the flange plate 20 during assembly, but also simplifies the assembly process and makes it more reliable. In addition, the positioning pin and the positioning hole are easy to process and have low cost. Figure 3 and Figure 4 As a specific example, as shown in Figs. 1 and 2, the first end surface 13 is provided with two positioning holes extending in the axial direction of the motor front cover 1, and the second end surface 22 is correspondingly provided with two positioning pins extending in the axial direction of the motor front cover 1. When the motor front cover 1 is assembled with the flange plate 20, each positioning pin is inserted into the corresponding positioning hole. This not only improves the coaxiality of the motor front cover 1 and the flange plate 20 during assembly, but also simplifies the assembly process and makes it more reliable. In addition, the positioning pin and the positioning hole are easy to process and have low cost.

[0083] In some embodiments of the present application, the driving motor 100 further comprises a first notch 132 extending along the first direction X and arranged on the first end surface 13. The first notch 132 is in plurality and arranged radially spaced apart along the motor front cover 1. The flange plate 20 further comprises a second notch 222 extending along the first direction X and arranged on the second end surface 22. The second notch 222 is in plurality and arranged radially spaced apart along the flange plate 20. The plurality of first notches 132 correspond to the plurality of second notches 222 one by one, and each first notch 132 forms a notch plug-in assembly with the corresponding second notch 222.

[0084] It should be noted that the notch assembly is a structure for centering and connecting, which is usually composed of a pair of convex and concave notches. The convex notch is composed of a protruding short cylinder and an end surface, and the concave notch is composed of a short hole and an end surface. Generally, the convex notch and the concave notch are fixed by close clearance fit and close end surface.

[0085] Specifically, the first end surface 13 in the application is formed with a plurality of first notches 132 extending along the first direction X, and the plurality of first notches 132 are arranged radially apart along the motor front end cover 1. Correspondingly, the second end surface 22 in the application is formed with a plurality of second notches 222 extending along the first direction X, and the plurality of second notches 222 are arranged radially apart along the flange plate 20. Further, the plurality of first notches 132 and the plurality of second notches 222 correspond one by one. It can be understood that since the notches usually appear in pairs, if the plurality of first notches 132 are configured as convex notches, the corresponding plurality of second notches 222 are configured as concave notches. For example, assuming that the first end surface 13 of the motor front end cover 1 is provided with four convex notches, the second end surface 22 of the flange plate 20 is correspondingly provided with four concave notches, and each convex notch corresponds to a concave notch. When the motor front end cover 1 and the flange plate 20 are assembled, the four convex notches of the first end surface 13 are inserted into the respective corresponding concave notches, so that each first notch 132 and the corresponding second notch 222 form a notch insertion assembly. In this way, through the notch insertion assembly between the plurality of first notches 132 and the corresponding second notches 222, another positioning and fitting mode is provided, which can further improve the positioning accuracy between the motor front end cover 1 and the flange plate 20, that is, it is beneficial to further improve the coaxiality during the assembly of the motor front end cover 1 and the flange plate 20.

[0086] In some embodiments of the application, as shown in Figures 3-6 The plurality of first notches 132 include a first convex notch and a first concave notch along the radial direction of the motor front end cover 1, and the size of the first convex notch is smaller than that of the first concave notch. The plurality of second notches 222 include a second concave notch corresponding to the first convex notch and a second convex notch corresponding to the first concave notch. The first convex notch and the second concave notch surround the motor output shaft 101 of the driving motor 100, and the first concave notch is arranged on the outer circumferential edge of the first end surface 13. The second convex notch is arranged on the outer circumferential edge of the flange plate 20.

[0087] Specifically, as shown in Figure 5As shown, the two first notches 132 of the first end face 13 of the motor front end cover 1 are respectively a first convex notch and a first concave notch, wherein the first convex notch is annularly protruded, the first convex notch surrounds the motor output shaft 101 of the driving motor 100, the first concave notch is an annular groove, the first concave notch is arranged at the outer periphery of the first end face 13 and the diameter of the first concave notch is larger than that of the first convex notch, correspondingly, the two second notches 222 of the second end face 22 of the flange plate 20 are respectively a second concave notch and a second convex notch, wherein the second convex notch is annularly protruded, the second convex notch is arranged at the outer periphery of the flange plate 20, the second concave notch is an annular groove, the second concave notch surrounds the input shaft 201 of the speed reducer 200, the diameter of the second convex notch is larger than that of the second concave notch, further, the first convex notch corresponds to the second concave notch, the diameter of the second concave notch is slightly larger than that of the first convex notch, the first concave notch corresponds to the second convex notch, and the diameter of the first concave notch is slightly larger than that of the second convex notch.

[0088] When the motor front end cover 1 and the flange plate 20 are assembled together, the first convex notch of the first end face 13 is inserted into the second concave notch of the second end face 22, and at the same time, the second convex notch of the second end face 22 is inserted into the first concave notch of the first end face 13, so that through the mutual insertion and cooperation of the first convex notch and the second concave notch and the second convex notch and the first concave notch, not only the coaxiality of the motor front end cover 1 and the flange plate 20 during assembly is improved, but also the connection strength of the motor front end cover 1 and the flange plate 20 is improved.

[0089] In some embodiments of the present application, as shown in Figure 5 Further comprising: a sealing member 3, an outer side wall of the first convex notch is provided with a sealing groove which surrounds the first convex notch in a circumferential direction, and the sealing member 3 is arranged in the sealing groove.

[0090] Specifically, the outer side wall of the first convex notch of the first end face 13 is provided with a sealing groove, which optionally surrounds the first convex notch in a circumferential direction, and the sealing member 3 is arranged in the sealing groove, the sealing member 3 is configured as an annular sealing member 3, the size of the sealing member 3 matches the size of the sealing groove, when the motor front end cover 1 and the flange plate 20 are assembled together, the first convex notch of the first end face 13 is inserted into the second concave notch of the second end face 22, and the sealing groove is clamped between the first convex notch and the second concave notch, and the sealing member 3 is arranged, which is beneficial to improve the sealing performance between the driving motor 100 and the speed reducer 200.

[0091] In some embodiments of the present application, as shown in Figure 5 and Figure 6As shown, the first end face 13 is formed with a second lightening groove 133 recessed towards the inside of the motor front end cover 1, and the inner wall of the second lightening groove 133 is provided with a second reinforcing rib 14. By arranging the second reinforcing rib 14 in the second lightening groove 133 of the first end face 13, on the one hand, the strength of the motor front end cover 1 can be improved, and on the other hand, the modal of the end cover of the driving motor 100 can be improved.

[0092] The vehicle according to the second aspect of the present application comprises the electric drive axle assembly according to the first aspect of the present application.

[0093] According to the vehicle of the second aspect of the present application, by arranging the above-mentioned electric drive axle assembly, in the process of assembling the motor front end cover and the flange plate, the second end of the first connecting part and the fourth end of the second connecting part are connected by the fastener, which is equivalent to providing an additional fixed mounting point outside the area of the motor front end cover and the flange plate being shielded by the reducer housing body along the first direction. This not only facilitates installation, but also realizes the fixed connection of the motor front end cover and the flange plate in the shielding area of the reducer housing body, reduces the risk of opening and closing deformation of the motor front end cover and the flange plate in the shielding area, improves the anti-vibration performance of the motor, and improves the NVH performance of the motor.

[0094] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusions, such that processes, methods, articles or devices that comprise a series of elements not only include those elements, but also include other elements not explicitly listed, or other elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0095] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0096] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

[0097] While embodiments of the application have been described in connection with the preferred embodiments of the various figures, those of ordinary skill in the art will appreciate that various modifications and variations of the preferred embodiments can be employed without departing from the spirit and scope of the application.

Claims

1. An electric drive axle assembly, characterized in that, include: A drive motor and a reducer are provided. Along a first direction, the drive motor includes a motor housing and a motor front cover connected in sequence, and the reducer includes a flange and a reducer housing body connected in sequence. The flange is fitted with the motor front cover. The motor front cover includes a first shielding area and a first non-shielding area, and the flange includes a second shielding area and a second non-shielding area. Along the first direction, the projections of the first shielding area and the second shielding area overlap with the projection of the reducer housing body, and the projections of the first non-shielding area and the second non-shielding area do not overlap with the projection of the reducer housing body. The drive motor further includes a first connecting portion. Along the radial direction of the front end cover of the motor, the first connecting portion has a first end and a second end. The first end is connected to the first shielding area, and the second end extends in a direction away from the front end cover of the motor. The reducer further includes a second connecting portion. Along the radial direction of the flange, the second connecting portion has a third end and a fourth end. The third end is connected to the second shielding area, and the fourth end extends in a direction away from the flange. Along the first direction, the projections of the second end and the fourth end do not overlap with the projection of the reducer housing body. The second end and the fourth end are arranged opposite to each other and are fixedly connected by fasteners.

2. The electric drive axle assembly according to claim 1, characterized in that, There are multiple first connecting parts, and the multiple first connecting parts are arranged at intervals along the circumference of the front end cover of the motor; There are multiple second connecting parts, and the multiple second connecting parts are arranged at intervals along the circumference of the flange, and the multiple first connecting parts correspond one-to-one with the multiple second connecting parts.

3. The electric drive axle assembly according to claim 1, characterized in that, The first connecting part is provided with a first weight reduction groove.

4. The electric drive axle assembly according to claim 3, characterized in that, The first weight-reducing groove is provided with a first reinforcing rib, which is adapted to divide the first weight-reducing groove into multiple first sub-weight-reducing grooves.

5. The electric drive axle assembly according to claim 1, characterized in that, Along the first direction, the motor front end cover has a first end face, and the flange has a second end face disposed opposite to the first end face; The first end face is provided with a first positioning part, and the second end face is provided with a second positioning part corresponding to the first positioning part. The first positioning part is adapted to be positioned and cooperated with the second positioning part.

6. The electric drive axle assembly according to claim 5, characterized in that, The first positioning part is constructed as either a positioning hole or a positioning pin, and the second positioning part is constructed as either the positioning hole or the positioning pin, wherein the positioning pin is adapted to be inserted into the positioning hole.

7. The electric drive axle assembly according to claim 5, characterized in that, The drive motor further includes a first stop, which extends along the first direction and is disposed on the first end face. There are multiple first stops, and the multiple first stops are arranged radially at intervals along the front end cover of the motor. The flange further includes a second stop, which extends along the first direction and has a second end face. There are multiple second stops, and the multiple second stops are arranged radially spaced along the flange. In this configuration, multiple first stops correspond one-to-one with multiple second stops, and each first stop and the corresponding second stop form a stop insertion assembly.

8. The electric drive axle assembly according to claim 7, characterized in that, The plurality of first stops include a first convex stop and a first concave stop, and along the radial direction of the motor front end cover, the size of the first convex stop is smaller than that of the first concave stop; The plurality of second stops include a second concave stop corresponding to the first convex stop and a second convex stop corresponding to the first concave stop. The first convex stop and the second concave stop surround the motor output shaft of the drive motor. The first concave stop is disposed on the outer periphery of the first end face, and the second convex stop is disposed on the outer periphery of the flange.

9. The electric drive axle assembly according to claim 8, characterized in that, Also includes: The sealing element has a sealing groove on the outer wall of the first protruding stop that surrounds the first protruding stop in the circumferential direction, and the sealing element is disposed in the sealing groove.

10. A vehicle, characterized in that, Includes the electric drive axle assembly according to any one of claims 1-9.

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