A parking brake for a vehicle includes an electric brake motor, a transmission, and a brake piston. The transmission transfers a drive movement of the motor to the brake piston. The transmission has a transmission efficiency that steadily increases as a temperature in the transmission rises.

In an approach to interlock braking, one or more driving wheels and one or more driven wheels are engaged to rotate in the same first direction. One or more braking wheels are driven by a power transmission mechanism associated with the one or more driving wheels. A first braking surface, associated with the one or more driven wheels, and a second braking surface, associated with the one or more braking wheels, engage. A braking force is generated by the engagement of the first braking surface and the second braking surface, and transmitted by the power transmission mechanism to the one or more driving wheels.

A system for locking a rotatable shaft may include a base member couplable to the rotatable shaft and rotatable about a rotation axis of the rotatable shaft through a plurality of angular positions, the base member comprises two or more curved slots; two or more pins positioned with respect to the base member such that at least one of the two or more pins is aligned with at least one of the two or more curved slots of the base member for any angular position of the base member; and an actuator to displace at least one of the two or more pins to removably insert at least one of the two or more pins into at least one of the two or more curved slots.

In an approach to interlock braking, one or more driving wheels and one or more driven wheels are engaged to rotate in the same first direction. One or more braking wheels are driven by a power transmission mechanism associated with the one or more driving wheels. A first braking surface, associated with the one or more driven wheels, and a second braking surface, associated with the one or more braking wheels, engage. A braking force is generated by the engagement of the first braking surface and the second braking surface, and transmitted by the power transmission mechanism to the one or more driving wheels.

A rotary lock system includes a gear configured to be driven to rotate via an engine. The rotary lock system includes a rotatable starter component configured to engage the gear via an interface. The interface includes a circumferential gap to enable the gear to rotate through an angle before contacting and driving the rotatable starter component.

An actuator assembly may comprise: a motor having a motor shaft; and a motor housing comprising a housing body accommodating at least a part of the motor and a housing cover coupled to the housing body, wherein an idler configured to tension a drive belt rotatably coupled to the motor shaft. The actuator assembly further comprises one or more couplers configured to allow the housing cover to be movable or rotatable relative to the housing body such that the idler fixed to the housing cover is movable or rotatable according to movement or rotation of the housing cover to adjust tension of the drive belt.

Provided is an electro-mechanical brake system and a method of operating the same including: a pair of pad plates disposed on both sides of a disk rotating together with a wheel; a piston configured to allow the pad plates to come in close contact with or to be separated from the disk; a first motor and a second motor configured to operate independently from each other and provide the piston with power; a first gear configured to decelerate power of the first motor and transmit the decelerated power; a second gear configured to convert power of the second motor into a translational motion and apply pressure to or release pressure on the piston while in contact with the piston, the second gear including a guide part slantly formed on a portion that comes in contact with the piston; and a connecting part connecting the first gear and the second gear to each other to allow the first gear and the second gear to rotate together with each other, the connecting part configured to couple the first gear and the second gear such that the second gear is slidable with respect to the first gear.

A brake assembly comprises a rotatable part configured to be rotatable by an actuator and a translatable part operably coupled with the rotatable part and configured to be axially translatable relative to the rotatable part to move the brake pad according to rotation of the rotatable part; and a bearing assembly configured to support the rotatable part. The bearing assembly comprises: an inner race comprising a forward inner race portion and an aft inner race portion; an outer race; and rollable balls. The forward inner race portion located closer to the brake pad than the aft inner race portion is made of a different and/or stronger material from and/or than the aft inner race portion located farther from the brake pad than the forward inner race portion, and/or is smaller than the forward inner race portion located farther from the brake pad than the aft inner race portion.

This clutch control apparatus includes a clutch apparatus, a clutch actuator, and a release mechanism, wherein the release mechanism includes a release shaft that transmits a drive force of the clutch actuator to the clutch apparatus side, the release shaft is divided into: a clutch-side shaft that is supported by a clutch-side member as a separate body from the clutch actuator; and a control-side shaft that is supported by the clutch actuator and is attachable to and detachable from the clutch-side shaft, and the clutch actuator configures an integral actuator unit that includes the control-side shaft.

This clutch control apparatus includes a clutch apparatus, a clutch actuator, and a release mechanism, wherein the release mechanism includes a release shaft that transmits a drive force of the clutch actuator to the clutch apparatus side, the release shaft is divided into: a clutch-side shaft that is supported by a clutch-side member as a separate body from the clutch actuator; and a control-side shaft that is supported by the clutch actuator and is attachable to and detachable from the clutch-side shaft, and the clutch actuator configures an integral actuator unit that includes the control-side shaft.