Integral casting axle housing for dual-motor integrated axle of commercial vehicle

Abstract

An integrally cast axle housing for a dual-motor integrated axle of a commercial vehicle comprises an axle housing assembly, the axle housing assembly is integrally cast and formed and is of a bilateral symmetry structure, the axle housing assembly comprises an axle housing middle section, an axle housing left section and an axle housing right section, and an upper thrust rod mounting boss is cast on the top face of the axle housing middle section; the front side and the rear side of the axle housing middle section are each provided with an electric drive power system assembly installation face. The top face of the axle housing left section and the top face of the axle housing right section are each provided with an upper plate spring installation face in a casting mode, the bottom face of the axle housing left section and the bottom face of the axle housing right section are each provided with a lower thrust rod installation boss in a casting mode, and the ends of the sides, away from the axle housing middle section, of the axle housing left section and the axle housing right section are each provided with an axle tube in a casting mode. And a brake mounting surface is arranged on the edge of the end part of each of the axle housing left section and the axle housing right section. The axle housing assembly is integrally cast, is high in integration level and plasticity, and is lighter than a traditional axle housing under the same strength, the unsprung mass of an automobile is reduced, and the mold types, the manufacturing cost and the like are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive axles for vehicles, and more specifically refers to an integral casting axle housing for a dual-motor integrated axle of a commercial vehicle. Background Art

[0002] The electric drive axle is to concentrate the axle, differential, transmission, motor, motor controller, etc. on the axle, eliminating the drive shaft of traditional cars. It has a high degree of integration and is convenient for the layout of chassis space. With the continuous development of new energy technology, electric drive axles have been widely used in the field of commercial vehicles to realize pure electric drive of commercial vehicles.

[0003] The electric drive axle housing is mainly composed of the axle housing body, axle tube, leaf spring seat, thrust rod support, etc. At present, some car companies have adopted mold opening to make the cast axle housing body, but the axle tube, leaf spring seat, thrust rod support and other parts connected to the axle housing body also need to be molded separately, which is easy to cause inconsistency with the axle housing body material, affecting the strength of the electric drive axle, and increasing the investment in mold development costs. Therefore, most car companies still use weldable materials to make axle housing bodies, axle tubes, leaf spring seats, thrust rod supports and other parts, so that the axle tubes, leaf spring seats, thrust rod supports, etc. are connected to the axle housing body by punching and welding. There are many component molds and complex processes, especially the friction welding process between the axle tube and the axle housing body, which has high equipment costs, and the installation dimensions need to be processed as a whole after welding, which is prone to welding defects and product quality problems. To this end, we provide an integral cast axle housing for commercial vehicle dual-motor integrated axles. Utility Model Content

[0004] The utility model provides an integral cast bridge shell for a dual-motor integrated bridge of a commercial vehicle, aiming to solve the shortcomings of the existing bridge shell, such as a segmented welded structure, multiple component molds, complex processes, easy welding defects, product quality problems, etc.

[0005] The utility model adopts the following technical solutions:

[0006] A one-piece cast bridge housing for a dual-motor integrated bridge of a commercial vehicle comprises a bridge housing assembly, which is integrally cast and has a left-right symmetrical structure. The bridge housing assembly comprises a bridge housing middle section, a bridge housing left section and a bridge housing right section. An upper thrust rod mounting boss is cast on the top surface of the bridge housing middle section, and an electric drive power system assembly mounting surface is respectively provided on the front and rear sides of the bridge housing middle section; an upper leaf spring mounting surface is cast on the top surface of the bridge housing left section and the bridge housing right section, respectively, and a lower thrust rod mounting boss is cast on the bottom surface of the bridge housing left section and the bridge housing right section, respectively, and an axle tube is cast on the end portion of the bridge housing left section and the bridge housing right section away from the bridge housing middle section, and a brake mounting surface is also respectively provided on the end edge of the bridge housing left section and the bridge housing right section.

[0007] In a preferred embodiment, the brake mounting surface is a flange surface, and a plurality of first threaded holes are formed on the flange surface for mounting a drum brake bracket or a disc brake bracket, and the shaft tube is used for mounting a wheel end assembly.

[0008] In a preferred embodiment, the upper thrust rod mounting boss and the lower thrust rod mounting boss are both provided with mounting through holes for mounting the upper thrust rod assembly and the lower thrust rod assembly.

[0009] In a preferred embodiment, a threaded connection hole is provided on the upper leaf spring mounting surface for mounting the upper leaf spring support.

[0010] In a preferred embodiment, a through hole is opened in the middle of the middle section of the above-mentioned bridge housing, and the front and rear end surface edges of the through hole respectively form the electric drive power system assembly mounting surface, and a plurality of second threaded holes are opened on the electric drive power system assembly mounting surface for installing the electric drive power system assembly.

[0011] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages:

[0012] 1. The axle housing assembly of the utility model adopts integral casting, integrating the axle housing, axle tube, upper thrust rod mounting boss and lower thrust rod mounting boss, with simple structure and high integration. The wall thickness of the axle housing can be uneven, with strong plasticity. Under the same strength requirement, the weight is lighter than the traditional axle housing, reducing the unsprung mass of the automobile and improving the vehicle's smoothness; reducing the types of molds and manufacturing costs, etc.

[0013] 2. The upper leaf spring mounting surface is provided with a threaded connection hole for installing the upper leaf spring support (wearing part) to facilitate maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is the installation diagram of the utility model. DETAILED DESCRIPTION

[0016] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details. For well-known components, methods and processes, they are not described in detail below.

[0017] An integral cast bridge shell for a dual-motor integrated bridge of a commercial vehicle, referring to Figure 1 , including a bridge housing assembly 1, the bridge housing assembly is integrally cast and has a bilaterally symmetrical structure, and the bridge housing assembly includes a bridge housing left section 101, a bridge housing middle section 102 and a bridge housing right section 103.

[0018] Reference Figure 1 The left section 101 and the right section 103 of the bridge housing are respectively cast with a left axle tube 21 and a right axle tube 22 at the end portions of one side away from the middle section 102 of the bridge housing. The end edges of the left section 101 and the right section 103 of the bridge housing are also respectively provided with a left brake mounting surface 31 and a right brake mounting surface 32.

[0019] Reference Figure 1 and Figure 2 , the left brake mounting surface 31 and the right brake mounting surface 32 are preferably flange surfaces. A plurality of first threaded holes are provided on the flange surface for mounting a drum brake bracket 33 or a disc brake bracket 34. The left axle tube 21 and the right axle tube 22 are used to mount a drum wheel end assembly 23 and a disc wheel end assembly 24, respectively. Of course, when a disc brake bracket is mounted on the left brake mounting surface, a disc brake assembly is correspondingly mounted on the left axle tube. Similarly, when a drum brake bracket is mounted on the right brake mounting surface, a drum brake assembly is correspondingly mounted on the right axle tube. The left brake mounting surface and the right brake mounting surface take into account both disc brake and drum brake platforms, and have good compatibility.

[0020] Reference Figure 1 and Figure 2 The top surface of the above-mentioned bridge housing middle section 102 is cast with an upper thrust rod mounting boss 41, and the upper thrust rod mounting boss 41 is provided with an upper mounting through hole 410 for mounting the upper thrust rod assembly 42. A through hole 500 is provided in the middle of the bridge housing middle section 102 along the front-to-back direction, which can reduce the weight of the bridge housing assembly. The front and rear end surface edges of the through hole 500 are the mounting surface 51 of the electric drive power system assembly 1 and the mounting surface 52 of the electric drive power system assembly 2. The mounting surface 51 of the electric drive power system assembly 1 and the mounting surface 52 of the electric drive power system assembly 2 are both provided with a plurality of second threaded holes 510, which are respectively used to connect the electric drive power system assembly 1 53 and the electric drive power system assembly 2 54.

[0021] Reference Figure 1 and Figure 2 The top surfaces of the left section 101 and the right section 102 of the axle housing are cast with a left upper leaf spring mounting surface 61 and a right upper leaf spring mounting surface 62, respectively. The left upper leaf spring mounting surface 61 and the right upper leaf spring mounting surface 62 are provided with threaded connection holes, which are used to install the left upper leaf spring support 63 and the right upper leaf spring support 64, respectively. The left upper leaf spring support 63 and the right upper leaf spring support 64 are respectively fixed to the left upper leaf spring mounting surface 61 and the right upper leaf spring mounting surface 62 through the threaded connection holes, which is convenient for maintenance and replacement.

[0022] Reference Figure 1 and Figure 2The bottom surfaces of the left section 101 of the bridge housing and the right section 102 of the bridge housing are respectively cast with a left lower thrust rod mounting boss 71 and a right lower thrust rod mounting boss 72. The left lower thrust rod mounting boss 71 and the right lower thrust rod mounting boss 72 are both provided with a lower mounting through hole 710 for mounting the lower thrust rod assembly 73.

[0023] The bridge housing assembly of the utility model adopts integral casting, has a simple structure, is lighter than a traditional bridge housing, reduces the unsprung mass of the automobile, and improves the smoothness of the vehicle.

[0024] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. An integral cast axle housing for a dual-motor integrated axle of a commercial vehicle, comprising an axle housing assembly, characterized in that: The bridge housing assembly is integrally cast and has a left-right symmetrical structure, and includes a bridge housing middle section, a bridge housing left section and a bridge housing right section. An upper thrust rod mounting boss is cast on the top surface of the bridge housing middle section, and an electric drive power system assembly mounting surface is respectively provided on the front and rear sides of the bridge housing middle section; an upper leaf spring mounting surface is cast on the top surface of the bridge housing left section and the bridge housing right section, respectively, and a lower thrust rod mounting boss is cast on the bottom surface of the bridge housing left section and the bridge housing right section, respectively, an axle tube is cast on the end portion of the bridge housing left section and the bridge housing right section away from the bridge housing middle section, and a brake mounting surface is also respectively provided on the end edge of the bridge housing left section and the bridge housing right section.

2. The integral casting bridge housing for a dual-motor integrated bridge of a commercial vehicle as claimed in claim 1, characterized in that: The brake mounting surface is a flange surface, and a plurality of first threaded holes are provided on the flange surface for mounting a drum brake bracket or a disc brake bracket, and the shaft tube is used for mounting a wheel end assembly.

3. The integral casting bridge housing for a dual-motor integrated bridge of a commercial vehicle as claimed in claim 1, characterized in that: The upper thrust rod mounting boss and the lower thrust rod mounting boss are both provided with mounting through holes for mounting the upper thrust rod assembly and the lower thrust rod assembly.

4. The integral casting bridge housing for a dual-motor integrated bridge of a commercial vehicle as claimed in claim 1, characterized in that: The upper leaf spring mounting surface is provided with a threaded connection hole for mounting an upper leaf spring support.

5. The integral casting bridge housing for a dual-motor integrated bridge of a commercial vehicle as claimed in claim 1, characterized in that: A through hole is opened in the middle of the middle section of the bridge housing, and the front and rear end surface edges of the through hole respectively form the electric drive power system assembly installation surface. A plurality of second threaded holes are opened on the electric drive power system assembly installation surface for installing the electric drive power system assembly.

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