Actuator with switchable releasing speed
AssigneeTimotion Technology Co., Ltd.
InventorChou-Hsin Wu
Life of this patent
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Abstract
An actuator with switchable releasing speed includes an actuation rod, a screw, and a motor. The motor drives the screw rotating so that the actuation rod axially moves relative to the screw. The motor includes a stator, a rotor, a plurality of commutators, and at least three brushes. The at least three brushes have a positive brush, a negative brush, and at least one auxiliary brush. The positive brush is connected to a positive DC voltage. One of the negative brush and the least one auxiliary brush is adjusted to connect to a negative DC voltage so as to change a rotational speed of the rotor, thereby controlling a movement speed of the actuation rod. Accordingly, the releasing speed of the actuator is switchable.
Claims20
An actuator with switchable releasing speed, comprising:
- an actuation rod;
- a screw screwed into the actuation rod;
- and
- a motor configured to drive the screw rotating so that the actuation rod axially moves relative to the screw;
- the motor comprising:
- a stator having a plurality of permanent magnet poles;
- a rotor having a plurality of windings, and the rotor rotating relative to the stator;
- a plurality of commutators correspondingly connected to the windings;
- and
- at least three brushes, comprising:
- a positive brush connected to a positive direct-current voltage;
- a negative brush;
- and
- at least one auxiliary brush;
- wherein one of the negative brush and the at least one auxiliary brush is adjusted to connect to a negative direct-current voltage so as to change a rotational speed of the rotor of the motor, whereby controlling a movement speed of the actuation rod.
Dependencies are inferred from the claim text.