Telescopic shaft
US6217456A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Nov 30, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S464/906
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a telescopic shaft as used, for example, in a connecting shaft between two joints of a driveshaft. The telescopic shaft comprises an outer part (6) and an inner part (12) and a cage (15) arranged therebetween. In the inner face of the outer part (6), there are arranged outer running grooves (10) which extend parallel to the longitudinal axis (5). In the inner part (12) entering the outer part (6) there are provided circumferentially distributed inner running grooves (14). The number of outer running grooves (10) is two or three times the number of inner running groves, so that the outer part (6) comprises more advantageous cross-sectional conditions for hardening operations. Hardness distortions are reduced so that the required functional play values for the opposed outer running grooves (10) and inner running grooves (14) can be accommodated and observed by means of balls (17) guided by a cage (15). The balls (17) permit a relative adjustment of the outer part (6) relative to the inner part (12) and a transmission of torque therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.