发明名称 |
Linear actuator |
摘要 |
A linear actuator is provided with an outer tube and an inner tube inserted in the outer tube so as to be free to slide. The linear actuator is also provided with a rod erected at a central axis part of the inner tube and forming an annular space between the rod and the inner tube, a rod guide provided at an extreme end of the rod in sliding contact with an inner surface of the outer tube, a plurality of permanent magnets arranged along an axial direction in the rod, and a plurality of coils retained by the outer tube so as to face the permanent magnets. A cross-sectional area of an outer periphery of the inner tube along which the outer tube slides and a cross-sectional area of an inner periphery of the outer tube along which the rod guide slides are set to be equal. |
申请公布号 |
US9197120(B2) |
申请公布日期 |
2015.11.24 |
申请号 |
US201113822563 |
申请日期 |
2011.09.08 |
申请人 |
KAYABA INDUSTRY CO., LTD. |
发明人 |
Kakiuchi Takashi;Satou Kousuke |
分类号 |
F16K15/03;H02K41/02;F16F15/03;H02K41/03;H02K5/10;H02K7/08;H02K11/00 |
主分类号 |
F16K15/03 |
代理机构 |
Hauptman Ham, LLP |
代理人 |
Hauptman Ham, LLP |
主权项 |
1. A linear actuator comprising an outer tube and an inner tube inserted in the outer tube, the linear actuator generating a thrust for relatively displacing the outer tube and the inner tube along an axial direction; further comprising:
a rod erected at a central axis part of the inner tube and forming an annular space between the rod and the inner tube; a rod guide provided at an extreme end of the rod in sliding contact with an inner surface of the outer tube; a plurality of permanent magnets arranged along the axial direction in the rod; and a plurality of coils retained by the outer tube so as to face the permanent magnets; wherein a cross-sectional area of an outer periphery of the inner tube along which the outer tube slides and a cross-sectional area of an inner periphery of the outer tube along which the rod guide slides are set to be equal. |
地址 |
Tokyo JP |