Linear motion guide unit
AssigneeNippon Thompson Co., Ltd.
InventorYusuke Yamaguchi
Life of this patent
Estimating the term…
Abstract
A linear motion guide unit includes a rail having a first raceway surface, a slider relatively movably attached to the rail, and a plurality of rolling elements. The slider includes a carriage, an end cap, and an end seal. The end seal includes a first lip portion exposed outwardly on one side in the longitudinal direction and in contact with the rail, and a second lip portion disposed inwardly of the first lip portion and in contact with the rail. The second lip portion has a negative allowance of interference that is greater in a first region facing the first raceway surface than in a second region facing a surface other than the first raceway surface.
Claims7
A linear motion guide unit comprising:
- a rail having a first raceway surface extending in a longitudinal direction;
- a slider relatively movably attached to the rail and having a second raceway surface facing the first raceway surface, the slider including a pair of wing portions disposed on both sides in a width direction of the rail and a base portion connected to each of the wing portions;
- and
- a plurality of rolling elements rolling on a load-carrying race composed of the first raceway surface and the second raceway surface;
- the slider including
- a carriage including the second raceway surface and having a first circulation passage provided in parallel with the load-carrying race,
- an end cap disposed on one side in the longitudinal direction of the carriage and having a second circulation passage provided to connect the load-carrying race with the first circulation passage, and
- an end seal having a shape following an outer shape of the carriage as viewed in the longitudinal direction and disposed on the one side in the longitudinal direction of the end cap to seal a gap between the slider and the rail,
- the end seal including
- a first lip portion exposed outwardly on the one side in the longitudinal direction and in contact with the rail,
- and a second lip portion disposed inwardly of the first lip portion in the longitudinal direction and in contact with the rail,
- the second lip portion having a negative allowance of interference that is greater in a first region facing the first raceway surface than in a second region facing a surface other than the first raceway surface.
A linear motion guide unit comprising:
- a rail having a first raceway surface extending in a longitudinal direction;
- a slider relatively movably attached to the rail and having a second raceway surface facing the first raceway surface, the slider including a pair of wing portions disposed on both sides in a width direction of the rail and a base portion connected to each of the wing portions;
- and
- a plurality of rolling elements rolling on a load-carrying race composed of the first raceway surface and the second raceway surface;
- the slider including
- a carriage including the second raceway surface and having a first circulation passage provided in parallel with the load-carrying race,
- an end cap disposed on one side in the longitudinal direction of the carriage and having a second circulation passage provided to connect the load-carrying race with the first circulation passage, and
- an end seal having a shape following an outer shape of the carriage as viewed in the longitudinal direction and disposed on the one side in the longitudinal direction of the end cap to seal a gap between the slider and the rail,
- the end seal including
- a first lip portion exposed outwardly on the one side in the longitudinal direction and in contact with the rail, and
- a second lip portion disposed inwardly of the first lip portion and in contact with the rail,
- the second lip portion having a negative allowance of interference provided only in a first region facing the first raceway surface.
Dependencies are inferred from the claim text.