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Assembling method for aligning and positioning through self-weight sinking in motor stator hot jacket process

A shrink-fit process and motor stator technology, which is applied in electromechanical devices, manufacturing motor generators, manufacturing stator/rotor bodies, etc., can solve problems such as rotor sweeping and stator mounting deviation, so as to avoid stator mounting deviation and ensure product quality , the effect of simple operation

Pending Publication Date: 2022-04-26
ZHUZHOU GEAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to avoid the problem of rotor sweeping caused by deflection of the stator during the shrink-fitting process of the motor stator

Method used

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  • Assembling method for aligning and positioning through self-weight sinking in motor stator hot jacket process
  • Assembling method for aligning and positioning through self-weight sinking in motor stator hot jacket process
  • Assembling method for aligning and positioning through self-weight sinking in motor stator hot jacket process

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing:

[0022] Such as figure 1 , 2 As shown, the motor includes a cylindrical rotor (not shown in the figure), a stator 2 and a motor housing 1 . The stator 2 has a cylindrical cavity, the stator 2 is press-fitted in the motor housing 1 , and the rotor is installed in the cylindrical cavity of the stator 2 .

[0023] The shrink-fit process of the stator 2 described in this application is to install the stator 2 into the housing 1 at high temperature. Due to the unavoidable deviation of the installation angle and the deviation of the direction of external pressure in the traditional press-fit method, it is difficult to guarantee the completion. The axis line of the press-fitted stator 2 coincides with the axis line of the housing 1, that is, the stator assembly deviation occurs during press-fitting.

[0024] Such as figure 2 , 3 As shown, an assembly method for aligning and p...

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Abstract

The invention discloses an assembly method for aligning and positioning by self-weight sinking in a motor stator hot jacket process, which comprises the following steps of: heating a shell of a motor to ensure that the inner diameter of a cavity of the shell is greater than the outer diameter of the stator and reaches a set difference value, clamping the stator, extending the stator into the cavity of the shell by a set depth, and loosening the clamping; and the stator sinks by self weight and is guided by the inner wall of the cavity of the shell to realize self-alignment and bottom falling, then heating is stopped, and the shell is used for realizing tightening positioning on the stator. The step of heating the shell of the motor comprises the steps of raising the temperature of a heating environment to 140-160 DEG C, and vertically placing the shell in the heating environment. The fixture has the advantages that the stator is not interfered by the fixture in the final stage of bottom falling of the stator, and no external pressure is applied to the stator, so that stator installation deviation caused by bottom falling angle deviation of the stator and / or external force application deviation (action point and direction deviation) is avoided, rotor chamber sweeping can be avoided, and product qualification is ensured.

Description

technical field [0001] The invention relates to an assembly method for aligning and positioning by self-weight sinking in the motor stator shrink-fit process, and belongs to the technical field of motor shrink-fit assembly. Background technique [0002] As the power source of electric vehicles, motors are the core components of electric vehicles. Therefore, the quality of the motor will affect the quality of the electric vehicle. The quality of the motor is not only determined by the design, but also the assembly process has a great influence on the quality of the motor. Among them, the stator shrink-fit process is one of the most critical processes in motor assembly. The most difficult thing to control is the deflection of the cylindrical stator when it is shrunk into the housing. The bottom of the coaxiality of the line often causes one side of the upper end of the rotor located in the inner space of the cylindrical stator and the other side of the lower end to touch or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/02H02K15/14
CPCH02K15/02H02K15/14
Inventor 黎超潘宁静刘平蔡央
Owner ZHUZHOU GEAR CO LTD
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