Clutch actuator

摘要

An actuator for driving a release mechanism of a clutch includes a motor, an output member, a ball screw mechanism, a trapezoidal screw mechanism and a power transmission mechanism. The output member is coupled to the release mechanism, and is movable in an actuation direction of the release mechanism. The ball screw mechanism is configured to convert rotation of the motor in one direction into movement of the output member in a first axial direction. The trapezoidal screw mechanism has a self-lock function against a reverse driving force from the release mechanism, and is configured to convert rotation of the motor in the other direction into movement of the output member in a second axial direction. The power transmission mechanism is configured to selectively transmit rotation of the motor to the ball screw mechanism or the trapezoidal screw mechanism.

主权项

1. A clutch actuator for driving a release mechanism of a clutch, comprising:
an electric motor; an output member coupled to the release mechanism, the output member being movable in an actuation direction of the release mechanism; a first drive mechanism configured to convert rotation of the electric motor in a first direction into movement of the output member in a first axial direction; and a second drive mechanism having a self-lock function against a reverse driving force from the release mechanism, the second drive mechanism being configured to convert rotation of the electric motor in a second direction into movement of the output member in a second axial direction, wherein the first drive mechanism includes
a first screw shaft having a first screw thread on an outer peripheral surface thereof, the first screw shaft being coupled to an output shaft of the electric motor;a first nut having a second screw thread on an inner peripheral surface thereof, the first nut being configured to contact the output member to move the output member in the first axial direction when the electric motor is rotated in the first direction while being configured to be moved away from the output member when the electric motor is rotated in the second direction; anda plurality of balls being disposed on the first and second screw threads.