Ball screw device having lubricating structure
US7234368B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2005 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Nov 15, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19772
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ball screw device includes a ball nut having an inner thread formed by a number of helical groove portions, a screw shaft having an outer thread formed by a number of helical groove portions, for threading with the inner thread of the ball nut, and a number of rolling members engaged in the helical groove portions of the ball nut and the screw shaft, for facilitating a movement of the ball nut relative to the screw shaft. One or more guide members are engaged in the helical groove portions of the screw shaft, and each has an oil retaining member for suitably absorbing oil and for continuously applying the oil onto the screw shaft. A tube may couple two of the helical groove portions of the ball nut together, to form an endless ball rolling passage and to receive the rolling members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.