An electric actuator includes an input member that is rotationally driven by the electric motor and includes a first rotation stop part on an inner periphery, an output member that includes a second rotation stop part engageable with the first rotation stop part, and a first screw part on an outer periphery, and a linear motion member that includes a second screw part engageable with the first screw part. Both the screw mechanism and the rotation-stop mechanism are formed on the outer periphery of the output member. Therefore, in the electric actuator, the radial and axial dimensions are shortened.

A wheel brake arrangement for a vehicle, the wheel brake arrangement comprising an eddy current wheel brake configured to receive electric power from a source of electric power of the vehicle during braking, and a transmission arrangement comprising a first shaft connected to the eddy current wheel brake and a second shaft connectable to a wheel of the vehicle, wherein the transmission arrangement comprises a ratio varying arrangement, the ratio varying arrangement being configured to, for any rotational speed below a predetermined threshold speed of the second shaft during braking, control a rotational speed of the first shaft to be maintained within a predetermined rotational speed range.

A drum brake device for a vehicle includes a first brake shoe and a second brake shoe movably coupled to a back plate, and spaced apart from each other; a wheel cylinder positioned between one end of the first brake shoe and one end of the second brake shoe, and configured to expand the distance between the one end of the first brake shoe and the one end of the second brake shoe; and an actuator positioned between another end of the first brake shoe and another end of the second brake shoe, and configured to provide a driving force to expand the distance between the one end of the first brake shoe and the one end of the second brake shoes and to expand the distance between the another end of the first brake shoe and the another end of the second brake shoe.

A traction assembly for terrestrial traction machines, which includes at least one gearmotor adapted to be associated with a track or wheel of the terrestrial traction machine, and a parking brake of an electromagnetic type which is associated with the gearmotor, and wherein the parking brake is of a multi-dry-disk type and is interposed between the driving component of the gearmotor and a speed limiter of the gearmotor.

A brake assembly having a sensor assembly that is received inside a shaft of a wear adjuster mechanism. The wear adjuster mechanism may be at least partially received inside a piston that may be rotatable about the axis and may be at least partially received in a tappet. The sensor may provide a signal that is indicative of rotation of the shaft.

A parking lock unit for a drive assembly, in particular with an electric motor, comprises a parking lock housing, a ratchet wheel rotationally fixedly connected to a part of the drive assembly, which is rotatably supported about a rotational axis by at least one bearing, and comprising a connecting portion and an engagement portion which are connected to one another via a web portion; a locking element which is supported in the parking lock housing and can lock and release a rotational movement of the parking ratchet wheel about a longitudinal axis of the parking ratchet wheel, and a controllable locking actuator which can reversibly transfer the locking element into a position locking the parking ratchet wheel and a position releasing the parking ratchet wheel, wherein the parking ratchet wheel is formed such that the engagement portion is axially offset with respect to the connecting portion.

A rotation locking device 4 has a locking gear 5; a reverse input blocking clutch having an input member 12 and an output member 13; and an engaging member 8, and switches between a first mode where an engaging claw portion 14 engages with an engaging concave portion 9 by the output member 13 rotating the engaging member 8 due to the input member 12 being rotationally driven, and rotation of the locking gear 5 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.

The invention relates to a brake shoe for a drum brake system, the brake shoe having a length configured to extend in a circumferential direction of a brake drum of the drum brake system, and a width configured to extend in an axial direction of the brake drum, wherein the brake shoe has spatially varying thermal properties along its length, in particular a change in heat capacity and/or a change in thermal expansion coefficient and/or a change in thermal conductivity. The invention also relates to a drum brake system having a brake shoe of the above-mentioned type.

Disclosed are a parking actuator and an electromechanical brake including the same. The parking actuator, which is connected to a brake actuator that performs braking of a vehicle, includes a parking gear connected to the brake actuator to be rotatable together, a parking lever having one side hingedly fixed and the other side engaged with the parking gear, a parking motor provided to generate power, a power conversion unit including a spindle member rotating by receiving a rotational driving force of the parking motor and a nut member screwed to the spindle member to move forward or backward, and a pressing unit installed on the nut member to press the parking lever by the nut member moved forward or backward.

A braking device comprising a body; inner supporting means for supporting the body for rotation about a first axis; outer supporting means for supporting the inner supporting means for rotation about a second axis; means for rotating the body about the first axis; means for connecting a rotation that is desired to be braked about a fourth axis to the body so as to transmit rotation and torque to the body (2) about the second axis (102); suspension means for supporting the outer supporting means.