Interference fit structure and method

A technology of interference fit and structural size, applied in the manufacture of motor generators, electrical components, electromechanical devices, etc., can solve the problems that ordinary machines are difficult to adapt to strong magnetic field environments, difficult to machine, and damage winding heads, etc. Small deformation, eliminating the trouble of dealing with strong magnetic fields, cost reduction effect

Active Publication Date: 2016-03-30
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. It requires an additional machining step;
[0007] 2. In the case of assembling the stator of the motor, the winding head of the stator is likely to be damaged during the machining process of the stator-related structure;
[0008] 3. In the case of assembling the rotor of the motor, because the rotor usually has a magnet with a strong magnetic field, it is difficult for ordinary machines to adapt to the strong magnetic field environment, so it is difficult to perform machining;
[0009] 4. The above three points make the manufacturing cost of additional machining very high

Method used

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  • Interference fit structure and method
  • Interference fit structure and method

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Embodiment Construction

[0043] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0044] The basic idea of ​​the invention is to incorporate mechanical compliance means, in particular at least two grooves, in the end region of the outer part of the two parts to be interference fitted, in order to reduce the strain on the outer part caused by the interference fit. The cone angle formed by the end region of the outer part, wherein at least one groove is provided on the inner side and the outer side of the outer part.

[0045] figure 2 It is a schematic cross-sectional view of a part of the stator and the cooling water jacket of the motor under the condition that the stator of the motor and the cooling water jacket of the motor are assembled using an...

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Abstract

The invention relates to an interference fit structure and method. Specifically, the structure comprises a first cylindrical part and a second cylindrical part, wherein the first and second parts extend along central axes. The axial length of the second part is greater than the axial length of the first part, and the first part is disposed in the second part through the technology of interference fit. A part, outside of the first part, of the second part is provided with at least two grooves along the central axis, wherein each groove extends in the radial direction of the second part. The first groove is opened towards a radial inner side of the second part, and the second groove is opened towards a radial outer side of the second part. In addition, the invention also provides a related interference fit method. According to the invention, the structure and method can reduce the deformation caused in the process of interference fit.

Description

technical field [0001] The present invention relates to an interference fit structure, especially an interference fit structure applicable to electric motors; and the present invention also relates to a method for interference fitting a cylindrical second part to a cylindrical first part method. Background technique [0002] In the mechanical field, the interference fit process is widely used in the assembly process of an outer part and an inner part passing through the outer part. In particular, currently, the interference fit process is widely used in the assembly process of the power transmission system of the electric motor. For example, the interference fit process may be applied to assembling the stator of the electric motor and the cooling water jacket of the electric motor; or may be applied to assembling the rotor hub of the electric motor and the rotor of the electric motor. An interference fit process known in the art is to cool the inner part to a very low temp...

Claims

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Application Information

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IPC IPC(8): H02K15/00
Inventor 西维奥·赞姆泽吴振华陈静
Owner SCHAEFFLER TECH AG & CO KG
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