Electric actuator expanded with sensor and electronic brake

Details Electric actuator expanded with sensor and electronic brake Electric actuator expanded with sensor and electronic brake

2006-11-28

2006-11-28

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

C310S015000, C310S020000, C310S06800R, C310S07500D, C074S089230

Reexamination Certificate

active

07141897

ABSTRACT:
An electric actuator that is capable of driving a motor in a cylindrical structure, such that the electric actuator itself can be expanded. The electric actuator includes: a motor for driving the electric actuator and a screw cylinder for connecting a shaft of the motor to a connecting part and for surrounding the external surface of the motor. The screw cylinder has right-handed and left-handed screw recesses formed thereon, and has first and second ball screw nuts. The first ball screw nut has a first electronic brake mounted thereon and the second ball screw nut has a second electronic brake mounted thereon, thereby enabling a non-stop reciprocating linear movement. An outside cylinder is provided with thrust bearings that are in contact with the first and second ball screw nuts, and is provided with a sensor that is disposed on the surface of a fixed part thereof for measuring the movement distance of the screw cylinder, thereby enabling the first and second electronic brakes to control the operations of the first and second ball screw nuts.

REFERENCES:
patent: 2791128 (1957-05-01), Geyer et al.
patent: 4246991 (1981-01-01), Oldakowski
patent: 6158295 (2000-12-01), Nielsen
patent: 6178837 (2001-01-01), Nagai et al.
patent: 6791215 (2004-09-01), Tesar
patent: 7047833 (2006-05-01), Durschmied
patent: WO 1998/29674 (1998-07-01), None
patent: WO 1999/02882 (1999-01-01), None
patent: WO 2000/29760 (2000-05-01), None

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