An adjustable motor housing positioning fixture
Patent Information
- Application Number
- CN202522137570.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-10
AI Technical Summary
[0004]现有电机上，通常在机壳上设定子定位台阶，但该定位台阶的加工需依赖精密机加工（车削/铣削）或定制冲压模具，显著增加制造成本，并且，台阶结构也导致硅钢片及外壳材料损耗率提升5-8%，且固定式定位台阶设计无法灵活调整定子与外壳的轴向配合关系，通用性也差
[0013]本实用新型工装由座体上叠套多个圆环形片构成，使用时按定子需装入机壳内的轴向深度尺寸来选择合适的圆环形片的数量，以座体的顶面作为定子定位面定位定子，以最上面一层圆环形片的顶面作为机壳的定位面定位定子，达到定子热套装置时的装配限位，以硬限位来达到控制定子铁芯压入机壳的轴向深度，具有以下优点：适配于不同的多种定子装入机壳内的轴向深度尺寸，兼容性强，且能实现快速换型。
Smart Images
Figure CN224843441U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor manufacturing and assembly, specifically to an adjustable motor housing positioning fixture. Background Technology
[0002] Currently, in the new energy vehicle industry, the motor is the main power component of the car, and with the development of new energy vehicles, the requirements for the motor are also getting higher and higher.
[0003] The stator housing machining process is a core step in motor manufacturing. It mainly refers to the process of accurately and firmly assembling the wound stator core (with windings) into the motor housing. In the entire process, "stator housing insertion" is the core step. Precisely controlling the axial depth of the stator core pressed into the housing is crucial, as it directly affects the uniformity of the air gap, electromagnetic performance, and operational reliability of the motor.
[0004] In existing motors, a positioning step is usually set on the housing. However, the machining of this positioning step requires precision machining (turning / milling) or custom stamping dies, which significantly increases the manufacturing cost. In addition, the step structure also leads to a 5-8% increase in the loss rate of silicon steel sheets and housing materials. Furthermore, the fixed positioning step design cannot flexibly adjust the axial fit between the stator and the housing, and its versatility is also poor.
[0005] Eliminating the positioning steps on the inner wall of the housing while precisely controlling the axial depth of the stator core pressed into the housing requires the design of specialized positioning fixtures. Utility Model Content
[0006] The purpose of this invention is to provide an adjustable motor housing positioning fixture to position the axial position of the stator and the housing, and to adapt to various axial dimension relationships for quick model changeover.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is: an adjustable motor housing positioning fixture, comprising: A body includes a cylindrical main body, and a raised edge protruding outward from the bottom outer edge of the cylindrical main body; Multiple annular pieces are stacked around the outer periphery of the cylindrical main body, with the bottommost annular piece in contact with the top surface of the convex edge; The top surface of the cylindrical main body of the base serves as the stator positioning surface that contacts the stator end face of the motor; the top surface of the uppermost annular piece of the plurality of annular pieces serves as the housing positioning surface that contacts the housing end face of the motor.
[0008] In the above scheme, the base body is composed of a cylindrical body and a circular bottom. The circular bottom is fixed to the bottom end of the cylindrical body. The width of the circular bottom is greater than the wall thickness of the cylindrical body, that is, the outer edge of the circular bottom protrudes from the outer periphery of the cylindrical body to form the convex edge.
[0009] Furthermore, the inner edge of the circular bottom also protrudes towards its axis from the inner edge of the cylinder.
[0010] In the above scheme, the inner diameter of the annular piece is 2 mm larger than the outer diameter of the cylindrical body.
[0011] In the above scheme, the outer diameter of the annular piece is more than 4mm larger than the outer diameter of the end face stop of the motor housing.
[0012] In the above scheme, the parallelism between the top surface of the cylindrical main body of the seat and the bottom surface of the seat is guaranteed to be 0.04mm.
[0013] This utility model fixture consists of multiple annular plates stacked on a base. During use, the appropriate number of annular plates is selected according to the axial depth dimension of the stator to be installed in the housing. The top surface of the base is used as the stator positioning surface to position the stator, and the top surface of the uppermost annular plate is used as the housing positioning surface to position the stator, achieving the assembly limit during stator heat fitting. The hard limit is used to control the axial depth of the stator core pressed into the housing. It has the following advantages: it is adaptable to various axial depth dimensions of stators installed in the housing, has strong compatibility, and can realize quick changeover. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a front view of the base body according to an embodiment of the present utility model; Figure 3 for Figure 2 BB-direction sectional view; Figure 4 This is a front view of the annular piece according to an embodiment of the present invention; Figure 5 for Figure 4 Left view diagram; Figure 6 This is a schematic diagram showing the usage state of an embodiment of this utility model.
[0015] In the above image: 1. Base; 11. Cylindrical main body; 12. Protruding edge; 101. Cylindrical body; 102. Circular bottom; 2. Circular ring-shaped piece; A. Stator positioning surface; B. Housing positioning surface. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1: See Figure 1-6 As shown: An adjustable motor housing positioning fixture includes a base 1 and multiple annular plates 2.
[0017] See Figure 1-3 As shown, the base 1 includes a cylindrical body 11, and a raised edge 12 protrudes outward from the bottom outer edge of the cylindrical body 11. Multiple annular pieces 2 are stacked on the outer periphery of the cylindrical body 11, and the bottommost annular piece 2 rests on and contacts the top surface of the raised edge 12.
[0018] See Figure 1 and Figure 6 As shown, the top surface of the cylindrical main body 11 of the base 1 serves as the stator positioning surface A, which contacts the stator end face of the motor. The top surface of the uppermost annular piece of the plurality of annular pieces 2 serves as the housing positioning surface B, which contacts the housing end face of the motor.
[0019] By adjusting the number of annular plates 2 or by using annular plates 2 of different thicknesses, the axial distance difference between the stator positioning surface A and the housing positioning surface B can be adjusted. This is the axial assembly dimension of the motor stator and housing.
[0020] See Figure 2-3 As shown, the base 1 can be integrally formed, but a preferred embodiment is that the base 1 is constructed by welding a cylindrical body 101 and a circular bottom 102. The circular bottom 102 is fixed to the bottom end of the cylindrical body 101. The width of the circular bottom 102 is greater than the wall thickness of the cylindrical body 101, meaning that the outer edge of the circular bottom 102 protrudes beyond the outer periphery of the cylindrical body 101, forming the convex edge 12. The inner edge of the circular bottom 102 also protrudes towards its axis beyond the inner edge of the cylindrical body 101. The relatively wide design of the circular bottom 102 facilitates the welding of the cylindrical body 101 and the circular bottom 102.
[0021] Specifically, the inner diameter of the annular piece 2 is 2mm larger than the outer diameter of the cylindrical body 11, so as to facilitate fitting while keeping it from being too loose.
[0022] Specifically, the outer diameter of the annular piece 2 is more than 4mm larger than the outer diameter of the end face stop of the motor housing, so that the positioning surface B of the housing can stably support the end face stop of the motor housing.
[0023] Specifically, to achieve positioning accuracy, the parallelism between the top surface of the cylindrical main body 11 of the base 1 and the bottom surface of the base 1 must be 0.04 mm. The parallelism between the top surface of the protruding edge 12 and the bottom surface of the base 1 must also be 0.04 mm. The parallelism between the top and bottom surfaces of each annular piece 2 must also be 0.04 mm.
[0024] When using, configure the tooling of this embodiment as follows: Select an appropriate number and thickness of annular pieces 2 according to the required axial assembly dimensions of the stator and housing of the motor and stack them on the base 1 so that the axial distance difference between the stator positioning surface A and the housing positioning surface B is precisely matched with the required axial assembly dimensions of the stator and housing.
[0025] The housing and stator are hoisted and placed on the tooling of this embodiment, and then the specific assembly process is carried out: stator heat fitting → cooling → set screw fixing → hoisting and separation.
[0026] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. An adjustable motor housing positioning fixture, characterized in that... include: A body (1) includes a cylindrical body (11) with a raised edge (12) protruding outward on the bottom outer edge of the cylindrical body (11). Multiple annular pieces (2) are stacked around the outer periphery of the cylindrical body (11), with the bottommost annular piece (2) in contact with the top surface of the convex edge (12); Among them, the top surface of the cylindrical body (11) of the seat (1) serves as the stator positioning surface (A) that contacts the stator end face of the motor; the top surface of the uppermost annular piece of the plurality of annular pieces (2) serves as the housing positioning surface (B) that contacts the housing end face of the motor.
2. The adjustable motor housing positioning fixture according to claim 1, characterized in that: The base (1) consists of a cylindrical body (101) and a circular bottom (102). The circular bottom (102) is fixed to the bottom port of the cylindrical body (101). The width of the circular bottom (102) is greater than the wall thickness of the cylindrical body (101), that is, the outer edge of the circular bottom (102) protrudes from the outer periphery of the cylindrical body (101) to form the convex edge (12).
3. The adjustable motor housing positioning fixture according to claim 2, characterized in that: The inner edge of the circular bottom (102) also protrudes toward its axis from the inner edge of the cylinder (101).
4. The adjustable motor housing positioning fixture according to claim 1, characterized in that: The inner diameter of the annular piece (2) is 2 mm larger than the outer diameter of the cylindrical body (11).
5. The adjustable motor housing positioning fixture according to claim 1, characterized in that: The outer diameter of the annular piece (2) is more than 4 mm larger than the outer diameter of the end face stop of the motor housing.
6. The adjustable motor housing positioning fixture according to claim 1, characterized in that: The top surface of the cylindrical main body (11) of the seat (1) is parallel to the bottom surface of the seat (1) by 0.04 mm.