A structure of a rotation locking device that is easily configured and capable of keeping cost down is achieved.

A rotation locking device 4 switches between a first mode where an engaging claw portion 14 engages with an engaging concave portion 9 by an output member 13 rotating an engaging member 8 due to an input member 12 being rotationally driven by an actuator 7, and rotation of a locking gear 5 supported by and fixed to an output shaft 3 of an automatic transmission 2 is restricted, and a second mode where engagement between the engaging claw portion 14 and the engaging concave portion 9 is released and rotation of the locking gear 5 is allowed.

A rotary drive member drives a driven member. A ring surrounding the driven member has two cam recesses containing lock members between cam surfaces of cam recesses and the ring. Each recess accommodates an associated lock member at different locations where the recess is shallower. Driving the driven member is permitted in a given rotation relative to the ring, but each lock member inhibits rotation of the driven member in the opposite sense. The recesses extend in opposite directions. Coupling between the driven members is free-play whereby reversal in the rotation disengages members and reengages. Protuberances extending into cam recesses retain a lock member associated with one recess at the deeper location permitting movement of the other lock member towards the shallower location. Upon reversal of the rotation, the protuberances retain another lock member at the deeper location permitting movement of one lock member.

Disclosed is an actuator for a parking brake. In accordance with an aspect of the disclosure an actuator for a parking brake includes a motor generating power; a reduction gear portion configured to transmit the power of the motor to a parking portion implementing the parking braking of a vehicle; a locking portion configured to limit rotation of the reduction gear portion; and a housing in which the motor, the reduction gear portion, and the locking portion are accommodated; wherein the locking portion is configured to a lock gear coupled to the reduction gear portion to rotate together, a lever provided to be engaged with the lock gear through a hinge motion, an elastic member elastically supporting the lever toward the lock gear, and an electromagnet member that generates electromagnetic force when the power is applied to separate the lever from the lock gear.

A disconnection assembly has a one-way clutch. The one-way clutch serves to either connect or disconnect the power connection of a vehicle. The disconnection assembly is installed in a reducer including an intermediate shaft, a bushing, an outer gear and a one-way clutch. The bushing is secured to the intermediate shaft by spline. The one-way clutch is disposed between the bushing and the outer gear. The one-way clutch is locked to drive the rotation of the intermediate shaft through the bushing when the outer gear rotates in a first direction, and the one-way clutch is released to allow the outer gear rotates freely when the outer gear rotates in a second direction.

A backdrive braking element is provided for preventing backdrive of a shaft. It includes a poly-lobed locking mechanism including an unlock shaft that has a polygon shaped inside profile and is coupled to a poly lock drive and brake assembly. The poly lock drive and brake assembly includes a plurality of poly lock drive and brake segments and is contained within the interior cavity of a housing.

A disconnection assembly has a one-way clutch. The one-way clutch serves to either connect or disconnect the power connection of a vehicle. The disconnection assembly is installed in a reducer including an intermediate shaft, a bushing, an outer gear and a one-way clutch. The bushing is secured to the intermediate shaft by spline. The one-way clutch is disposed between the bushing and the outer gear. The one-way clutch is locked to drive the rotation of the intermediate shaft through the bushing when the outer gear rotates in a first direction, and the one-way clutch is released to allow the outer gear rotates freely when the outer gear rotates in a second direction.

Prosthetic devices and, more particularly, modular myoelectric prosthesis components and related methods, are described. In one embodiment, a hand for a prosthetic limb may comprise a rotor-motor; a transmission, comprising a differential roller screw; a linkage coupled to the transmission; and at least one finger coupled to the linkage. In one embodiment, a component part of a wrist of a prosthetic limb may comprise an exterior-rotor motor, a planetary gear transmission, a clutch, and a cycloid transmission. In one embodiment, an elbow for a prosthetic limb may comprise an exterior-rotor motor, and a transmission comprising a planetary gear transmission, a non-backdrivable clutch, and a screw.

The present invention is directed to a self-locking non-backdrivable gear system. The gear system may comprise a primary motor input and gear box. The primary motor input is for rotation of the gearbox about the axis of a drive shaft. The gearbox may comprise an input ring gear, one or more locking gears, fixed gear, and output gear. In operation, rotation of the primary motor input causes rotation of the ring gear which causes rotation of the locking gear which causes rotation of the output gear which causes rotation of the drive shaft. However, in the absence of rotation of the ring gear, a rotational force applied to the output gear causes the gear teeth on the fixed and output gears to lock the gear in place.

A compact, efficient, and reliable electromechanical actuator that is capable of driving heavy loads at a high rate of speed and also capable of resisting large back driving forces. The actuator resists tension and compression back driving forces in a static state as well as when the actuator extends and retracts. The back driving forces are resisted even if the electronics (e.g., motor) fail.

The invention relates to a solar plant (1) having at least one pivotable module table (2a, 2b, 2c) which supports at least one photovoltaic solar module (3), preferably multiple photovoltaic solar modules (3), and is coupled in such a manner to at least one gear element (4) pivotable about an axis (A) that pivoting the gear element (4) causes the module table (2a to 2c) to be pivoted so that the solar modules (3) track the motion of the sun, the gear element (4) being driven and thus pivoted by an electrically driven drive shaft (5), at least one actuation element (8) being integrated in the drive shaft (5), the gear element (4) being both driven and blocked by the actuation element (8), the actuation element (8) engaging into the toothing (11) of the gear element (4) for driving or blocking the gear element (4).