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Assembly for securing the axial position of a sun gear of a planetary gearing stage on a rotor shaft of an electric machine, and use of such an assembly

A planetary gear transmission, sun gear technology, applied in electric components, transmission parts, electrical components, etc., can solve the problems of high cost, inability to open, expensive special fixing rings, etc., to save space, avoid expansion and loosening Effect

Active 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

They are self-contained so cannot be opened by centrifugal force
The use of special retaining rings is expensive and can only be achieved with great effort in series mounting or only manually
Furthermore, removal is usually only possible by breaking the retaining ring

Method used

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  • Assembly for securing the axial position of a sun gear of a planetary gearing stage on a rotor shaft of an electric machine, and use of such an assembly
  • Assembly for securing the axial position of a sun gear of a planetary gearing stage on a rotor shaft of an electric machine, and use of such an assembly
  • Assembly for securing the axial position of a sun gear of a planetary gearing stage on a rotor shaft of an electric machine, and use of such an assembly

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] figure 1 and figure 2 An example of an assembly according to the invention for fixing the axial position of a sun gear 1 of a planetary gear stage on a rotor shaft 2 of an electric machine is shown. A sun gear 1 is non-rotatably assembled on a rotor shaft 2 and meshes with a set of planet gears 3 of a planetary gear stage (not shown) for driving purposes. The rotor shaft 2 carries the coaxially assembled rotor 4 of the electric machine. On the axial side facing away from the rotor, the inner diameter of the sun gear 1 is stepped radially outwards by a radial annular shoulder 5 and is fixed axially on this radial annular shoulder by a fastening ring 6 assembled on the rotor shaft 2 superior. The fixing ring 6 fixes the sun gear 1 axially against its annular shoulder 5 and allows the sun gear to enter a fixing groove 7 on the outer diameter of the rotor shaft 2 for attachment. The annular shoulder 5 delimits an end section 8 of the sun gear 1 , which is stepped radia...

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PUM

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Abstract

The invention relates to an assembly for securing the axial position of a sun gear (1) of a planetary gearing stage on a rotor shaft (2) of an electric machine. The sun gear (1) has an end section (8)which is stepped radially outwards on the inner diameter and is axially secured to the rotor shaft (2) by means of at least one securing ring (6), and at least one securing element (9) is provided inorder to secure against the centrifugal forces acting on the securing ring (6) during a rotation of the rotor shaft (2), wherein the securing element is plugged into the end section (8) on the sun gear (1) in order to be attached, and the securing element is pushed at least partly over the securing ring (6) and radially secures same.

Description

technical field [0001] The invention relates to an assembly for fixing the axial position of a sun gear of a planetary gear stage on the rotor shaft of an electric machine and to such a The purpose of the component. 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 arranged there for mounting the rotor shaft of the electric machine. The roller bearings are each fixed on the rotor shaft by a retaining ring embedded in a shaft groove. The disadvantage of this embodiment is the fact that, for simple standard retaining rings, the centrifugal forces acting during operation may cause the corresponding retaining ring on the rotor shaft in the motor to expand and loosen from about 6000rpm or higher, thereby Axial fixation on the rotor shaft is no longer guaranteed. Therefore, in such cases, special retaining rings must be used, in particula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H57/08F16B21/18
CPCH02K7/116F16H57/08H02K7/003F16B4/004F16B21/186F16H57/023F16H57/082F16H2057/085
Inventor 伯恩哈德·林茨马赛尔·拉克
Owner SCHAEFFLER TECH AG & CO KG
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