Integrated casting motor shell structure and processing technology

Abstract

The invention relates to an integrated casting motor shell structure and a machining process, and solves the problems that a traditional split type motor shell is large in machining and assembling accumulated tolerance, the precision is difficult to guarantee, and the coaxiality is poor. The integrally cast motor shell comprises an integrally cast shell (1) and a rear end cover (2). Two positioning structure holes, namely a first shell positioning hole (3) and a second shell positioning hole (5), are respectively designed in the integrally-cast shell (1) and the rear end cover (2), and two positioning structure holes, namely a first rear end cover positioning hole (4) and a second rear end cover positioning hole (6) are correspondingly designed in the rear end cover (2) in a matched mode. The first shell positioning hole (3), the second shell positioning hole (5), the first rear end cover positioning hole (4) and the second rear end cover positioning hole (6) serve as positioning references, one-time matching machining of the integrally-cast shell (1) and the rear end cover (2) is carried out, and the tolerance caused in the machining process is reduced. According to the invention, the machining precision and consistency are greatly ensured; and the coaxiality of the motor is effectively improved.

Description

Technical Field

[0001] The invention belongs to casting technology, and in particular relates to an integrated casting motor housing structure and a processing technology. Background Art

[0002] Pure electric vehicles have been recognized and favored by the majority of users in recent years for their convenience, energy saving, environmental protection, excellent acceleration performance and other advantages. The market share and production-sales ratio have increased year by year. As the core component of pure electric vehicles, the performance of the drive motor is directly reflected in the running performance of the vehicle, and it is also a reflection of the vehicle enterprise and its product technology research and development capabilities. At present, the shell structure of the drive motor products in the industry is composed of three parts: the outer shell and the front and rear end covers, which are bolted together.

[0003] The advantages of the traditional split motor housing solution are relatively simple manufacturing and processing technology, strong versatility, and low development cost. The disadvantages are large cumulative tolerances in split processing and assembly, difficulty in ensuring assembly accuracy, and poor coaxiality, which affect the motor's output performance, driving experience, and service life. Summary of the invention

[0004] In view of the defects of traditional split motor housing, large cumulative tolerance in processing and assembly, difficulty in ensuring precision, and poor coaxiality, we have designed and developed an one-piece casting housing. By reducing assembly combinations, one-time processing technology, and optimizing and strengthening positioning structure, we can effectively improve the problems of large cumulative tolerance in processing and assembly, difficulty in ensuring precision, and enhance the technical quality level of core components and product competitiveness.

[0005] The present invention is achieved by the following technical solutions:

[0006] An integrated cast motor housing structure includes an integrated cast housing 1, a rear end cover 2, a housing positioning hole 1 3, a housing positioning hole 2 5, a rear end cover positioning hole 1 4 and a rear end cover positioning hole 2 6. The housing positioning hole 1 3 and the housing positioning hole 2 5 are arranged on the integrated cast housing 1, and the rear end cover positioning hole 1 4 and the rear end cover positioning hole 2 6 are arranged on the rear end cover 2. The housing positioning hole 1 3 and the rear end cover positioning hole 1 4, the housing positioning hole 2 5 and the rear end cover positioning hole 2 6 are respectively matched as processing positioning references.

[0007] A one-piece cast motor housing processing technology, the one-piece cast motor housing comprises an one-piece cast housing 1, a rear end cover 2, a housing positioning hole 1 3, a housing positioning hole 2 5, a rear end cover positioning hole 1 4 and a rear end cover positioning hole 2 6, two positioning structure holes are respectively designed on the one-piece cast housing 1 and the rear end cover 2: housing positioning hole 1 3 and housing positioning hole 2 5, and two positioning structure holes are matched and designed on the corresponding rear end cover 2: rear end cover positioning hole 1 4 and rear end cover positioning hole 2 6, the housing positioning hole 1 3 and the housing positioning hole 2 5, the rear end cover positioning hole 1 4 and the rear end cover positioning hole 2 6 are used as positioning references, and the one-piece cast housing 1 and the rear end cover 2 are assembled and processed at one time to reduce the tolerance caused during the processing.

[0008] Beneficial effects of the present invention:

[0009] (1) The one-piece casting shell design reduces one assembly structure, and one-time processing greatly ensures processing accuracy and consistency;

[0010] (2) The processing, assembly and positioning structure and one-time assembly processing improve the assembly and processing accuracy and effectively improve the coaxiality of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the one-piece casting motor housing of the present invention;

[0012] Figure 2 It is a schematic diagram of the one-time assembly processing of the present invention. DETAILED DESCRIPTION

[0013] like Figure 1 As shown, the present invention is an integrated cast motor housing structure and includes an integrated cast housing 1, a rear end cover 2, a housing positioning hole 1 3, a housing positioning hole 2 5, a rear end cover positioning hole 1 4 and a rear end cover positioning hole 2 6.

[0014] like Figure 2 As shown, the specific implementation method during processing: fully consider the product structure function, material properties, draft angle casting process feasibility and other factors, optimize the traditional motor housing and front cover structure to design an integrated casting housing 1, and reduce the error caused during the processing. Match the integrated casting housing 1 to design the rear end cover 2, reduce the cumulative tolerance of processing and assembly, and design and match two positioning structure holes on the integrated casting housing 1 and the rear end cover 2. The integrated casting housing 1 is designed with housing positioning hole 1 3 and housing positioning hole 2 5, and the rear end cover 2 is designed with rear end cover positioning hole 1 4 and rear end cover positioning hole 2 6. With housing positioning hole 1 3 and housing positioning hole 2 5, rear end cover positioning hole 1 4 and rear end cover positioning hole 2 6 as the positioning reference, the integrated casting housing 1 and the rear end cover 2 are designed with a one-time assembly processing tool 7 for one-time assembly processing, which once again reduces the tolerance caused during the processing.

Claims

1. An integrated cast motor housing structure, characterized in that: The invention comprises an integral casting shell (1), a rear end cover (2), a shell positioning hole 1 (3), a shell positioning hole 2 (5), a rear end cover positioning hole 1 (4) and a rear end cover positioning hole 2 (6); the shell positioning hole 1 (3) and the shell positioning hole 2 (5) are arranged on the integral casting shell (1); the rear end cover positioning hole 1 (4) and the rear end cover positioning hole 2 (6) are arranged on the rear end cover (2); the shell positioning hole 1 (3) and the rear end cover positioning hole 1 (4), the shell positioning hole 2 (5) and the rear end cover positioning hole 2 (6) are respectively matched as machining positioning references.

2. A one-piece casting motor housing processing technology, characterized by: The one-piece cast motor housing comprises an one-piece cast housing (1), a rear end cover (2), a housing positioning hole 1 (3), a housing positioning hole 2 (5), a rear end cover positioning hole 1 (4) and a rear end cover positioning hole 2 (6). Two positioning structure holes are respectively designed on the one-piece cast housing (1) and the rear end cover (2): the housing positioning hole 1 (3) and the housing positioning hole 2 (5). Two positioning structure holes are matched and designed on the rear end cover (2): the rear end cover positioning hole 1 (4) and the rear end cover positioning hole 2 (6). The one-piece cast housing (1) and the rear end cover (2) are assembled and processed at one time with the housing positioning hole 1 (3) and the housing positioning hole 2 (5), the rear end cover positioning hole 1 (4) and the rear end cover positioning hole 2 (6) as positioning references, thereby reducing the tolerance caused during the processing.

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