Track rail and motion guidance apparatus including the track rail
US8414190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2008 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | Sep 5, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/585
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Rigidity and precision of a motion guidance apparatus are increased by improving track rail shape. A track rail has at least two rolling member rolling grooves (RMRGs) on the upper surface and at least one RMRG on each side surface, the RMRGs extending in the longitudinal direction. When the RMRGs are taken along a cross-sectional plane perpendicular to the longitudinal direction of the track rail, and two imaginary lines extending vertically downward are drawn from ends of the respective grooves located on the outer sides among upper surface RMRGs, all the side surface RMRG are positioned in the rail but outside the corresponding one of the two imaginary lines, and at least portions of the upper surface and the side surfaces of the track rail, on which the RMRGs are formed, the portions being in the vicinity of the respective RMRGs, are formed with an inclination angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.