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Arrangement for securing at least one circlip against centrifugal force, which circlip is axially fastened on a rotor shaft of an electrical machine for positional securing, and use of an arrangement of this type

A technology of retaining rings and rotor shafts, which is applied to rotating parts, electromechanical devices, shafts and bearings that resist centrifugal force, and can solve problems such as inability to open, great effort, and high cost of special retaining rings, and achieves a compact structure, Avoid swelling and loosening effects

Pending Publication Date: 2020-12-15
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this embodiment is that, with simple standard circlips, the centrifugal force during operation can cause the corresponding circlip on the rotor shaft in the motor to expand and loosen from about 6000rpm and above, by This no longer guarantees axial fixation on the rotor shaft
These retaining rings are self-contained and therefore cannot be opened by centrifugal force
The use of special retaining rings is costly and can only be achieved with great effort during in-line assembly or by hand
Also, removal is usually only possible by breaking the circlip

Method used

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  • Arrangement for securing at least one circlip against centrifugal force, which circlip is axially fastened on a rotor shaft of an electrical machine for positional securing, and use of an arrangement of this type
  • Arrangement for securing at least one circlip against centrifugal force, which circlip is axially fastened on a rotor shaft of an electrical machine for positional securing, and use of an arrangement of this type

Examples

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Embodiment Construction

[0024] figure 1 with figure 2 An example of a device according to the invention is shown for securing two circlips 4 , 5 axially fastened on the rotor shaft 3 of an electric machine against centrifugal force. These circlips are used to fix the axial position of the two bearings 1 , 2 which are arranged on the rotor shaft 3 of the electric machine and are designed as radial ball bearings and form the rotor shaft bearing. The rotor shaft 3 carries the coaxially arranged rotor 14 of the electric machine, wherein the inner bearing rings of the bearings 1 , 2 are fixed axially on the axially outer side facing away from the rotor by means of corresponding circlips 4 , 5 . The circlips 4, 5 rest axially outside the bearing inner rings of the bearings 1, 2 and each axially fix them. The circlips are each recessed into a fixing groove 6, 7 on the outer diameter of the rotor shaft 3 for attachment.

[0025] On the outer sides of the circlips 4 , 5 , the fastening elements 8 , 9 are ...

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Abstract

The invention relates to an arrangement for securing at least one circlip (4, 5) against centrifugal force, which circlip is axially fastened on a rotor shaft (3) of an electrical machine for positional securing, at least one securing element (8, 9) being provided for securing against the centrifugal forces acting on the circlip (4, 5) when the rotor shaft (3) rotates, which at least one securingelement is placed onto the rotor shaft (3) by means of a first portion (11) for fastening and, by means of a second portion (12), is slid at least partially over the circlip (4, 5) and radially secures the circlip.

Description

technical field [0001] The invention relates to a device for securing at least one circlip against centrifugal force, and the use of a device of this type according to the type defined in more detail in the preamble of claim 1 or 10, the circlip being fastened axially On the rotor shaft of the motor for positional fixation. Background technique [0002] A bearing arrangement for a drive having at least one electric motor is known from DE 10 2011 082 017 A1. A first roller bearing and a second roller bearing are provided here for mounting the rotor shaft of the electric machine. The roller bearings are each fixed on the rotor shaft by means of circlips embedded in grooves in the shaft. The disadvantage of this embodiment is that, with simple standard circlips, the centrifugal force during operation can cause the corresponding circlip on the rotor shaft in the motor to expand and loosen from about 6000rpm and above, by This no longer guarantees axial fixation on the rotor s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/08F16C35/063F16B21/18
CPCH02K5/15H02K5/1732H02K7/083F16B4/004F16B21/186F16C15/00F16C19/06F16C35/063F16C35/067F16B21/18
Inventor 伯恩哈德·林茨马塞尔·拉克
Owner SCHAEFFLER TECH AG & CO KG