| 发明名称 |
NON BACK-DRIVEABLE SCREW MECHANISM |
| 摘要 |
A screw mechanism comprising a screw provided with an outer thread, a nut surrounding and coaxial with the screw, the nut being provided with an inner thread, and a plurality of rolling elements radially disposed between the screw and the nut and engaged in both of the outer and inner threads. A contact diameter Dcontact between the rolling elements and the nut is defined by:;Dcontact≥Lπ×tan(Φ)wherein L corresponds to the lead of the screw mechanism and Φ corresponds to a determined non-back-driving factor which is chosen from 0°<Φ≦1°. The contact diameter is provided in order to prevent back-driving of the mechanism. |
| 申请公布号 |
US2016146319(A1) |
申请公布日期 |
2016.05.26 |
| 申请号 |
US201314904126 |
申请日期 |
2013.07.16 |
| 申请人 |
AKTIEBOLAGET SKF |
发明人 |
DUBUS Jérôme;LECLUSE Sébastien;BOCH Christian |
| 分类号 |
F16H25/22 |
主分类号 |
F16H25/22 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A screw mechanism comprising:
a screw provided with an outer thread, a nut surrounding and coaxial with the screw, the nut being provided with an inner thread, and a plurality of rolling elements radially disposed between the screw and the nut and engaged in both of the outer and inner threads, wherein a contact diameter (Dcontact) between the rolling elements and one of the screw or the nut is defined by:Dcontact≥Lπ×tan(Φ) wherein L corresponds to the lead of the screw mechanism, and wherein Φ corresponds to a determined non-back-driving factor that is chosen from 0°<Φ≦1°, wherein the contact diameter is provided in order to prevent back-driving of the mechanism. |
| 地址 |
Goteborg SE |
