Asmo Co., Ltd.

Naoki Ueno

Takayuki Yamamoto

Tomoyuki Kikuta

While a regulation gear is positioned in a disengaged position where the regulation gear is disengaged from a pinion of a driving motor during running of a vehicle, a controller continuously applies a small holding voltage to a switching motor that drives the regulation gear to prevent engagement of the regulation gear with the pinion. The holding voltage is chosen to be relatively small, but enough to prevent engagement of the regulation gear with the pinion upon application of vibrations or shocks encountered during running of the vehicle.

Brake device actuator and brake device having the same

An actuator for driving a load includes a driving motor for driving and operating an output shaft, and a slipping prevention unit for preventing a slipping of the output shaft due to an external force from a load side. The slipping prevention unit includes a regulation gear which is disposed to engage or disengage with a pinion rotating with a rotation of the driving motor, and a switching motor which electrically switches operation of the regulation gear between an engagement state and a non-engagement state. In the engagement state, the regulation gear engages with the pinion so that at least one side rotation of the pinion is prevented. Thus, the actuator having the slipping prevention unit has a simple structure.

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Hamamatsu, Japan

Naoki Ueno