A brake operation sensor detects a position of an input member. An angle sensor detects a position of a power piston. An ECU drives and controls an electric motor based on a relative position between the input member and the power piston. Then, the input member and the power piston are subjected to a mechanical limitation on a relative displacement therebetween due to abutment with each other at a step. The ECU advances/retracts the power piston independently of the movement of the input member, and determines the abutment state between the input member and the power piston under the mechanical limitation based on the detected relative position. Then, the ECU corrects the relative position between the input member and the power piston based on this determination to control the electric motor.

A brake operation sensor detects a position of an input member. An angle sensor detects a position of a power piston. An ECU drives and controls an electric motor based on a relative position between the input member and the power piston. Then, the input member and the power piston are subjected to a mechanical limitation on a relative displacement therebetween due to abutment with each other at a step. The ECU advances/retracts the power piston independently of the movement of the input member, and determines the abutment state between the input member and the power piston under the mechanical limitation based on the detected relative position. Then, the ECU corrects the relative position between the input member and the power piston based on this determination to control the electric motor.

A powered vehicle includes a spring-applied hydraulic release (SAHR) vehicle brake comprising first and second mutually engageable brake elements. The first brake element is secured to or forms part of a rotatable element of the drive train of the vehicle and the second is non-rotatably moveably mounted on the vehicle such that the first and second elements are mutually engageable with and separable from one another. Mutual engagement of the brake elements causes braking of rotation of the rotatable element. The SAHR vehicle brake includes (i) a resiliently deformable member acting on the second brake element so as to urge the first and second brake elements into mutual engagement and (ii) a hydraulic control circuit for applying hydraulic pressure to the second brake element so as to oppose the action of the resiliently deformable member and thereby normally maintain the first and second brake elements separated from one another.

The present invention provides a pallet carrier, comprising a carrier frame structure; a fork structure disposed on the carrier frame structure; a driving wheel structure comprising driving wheels that are articulated to the carrier frame structure, wherein each one of the driving wheels is set as a one-piece wheel structure integrated with a driving motor and a hub. The pallet carrier has the advantages of simple structure and work reliability.

The present invention provides a pallet carrier, comprising a carrier frame structure; a fork structure disposed on the carrier frame structure; a driving wheel structure comprising driving wheels that are articulated to the carrier frame structure, wherein each one of the driving wheels is set as a one-piece wheel structure integrated with a driving motor and a hub. The pallet carrier has the advantages of simple structure and work reliability.

A braking device for a vehicle, in particular a motor vehicle, including an actuatable brake pedal, a piston of a master brake cylinder mechanically coupled to the brake pedal, the piston being supported in the master brake cylinder so as to be axially displaceable in an actuation direction and in a release direction, and including at least one radial seal that acts between the piston and the master brake cylinder. At least one elastically deformable and/or displaceable damping element opposes the displacement of the piston in the release direction.

A braking device for a vehicle, in particular a motor vehicle, including an actuatable brake pedal, a piston of a master brake cylinder mechanically coupled to the brake pedal, the piston being supported in the master brake cylinder so as to be axially displaceable in an actuation direction and in a release direction, and including at least one radial seal that acts between the piston and the master brake cylinder. At least one elastically deformable and/or displaceable damping element opposes the displacement of the piston in the release direction.

An automotive air pressure spring brake chamber includes a head housing, a bottom housing, an adaptor housing between the head housing and the bottom housing, a piston between the head housing and the adaptor housing, a hollow actuator rod coupled to the piston, and a caging bolt assembly moving through the actuator rod by rotation of a caging bolt and being disposed along the through-hole of the adaptor housing, in which a caging nut is coupled to an end of the caging bolt. The caging bolt assembly includes a caging bolt body having a caging bolt head at an upper end, an indicator coupled in an axial direction through the caging bolt body, a nut stopper coupled to an end of the indicator, the caging nut screw-coupled to an outer circumferential surface of the caging bolt body, and an elastic structure between the indicator and the caging bolt body.

An automotive air pressure spring brake chamber includes a head housing, a bottom housing, an adaptor housing between the head housing and the bottom housing, a piston between the head housing and the adaptor housing, a hollow actuator rod coupled to the piston, and a caging bolt assembly moving through the actuator rod by rotation of a caging bolt and being disposed along the through-hole of the adaptor housing, in which a caging nut is coupled to an end of the caging bolt. The caging bolt assembly includes a caging bolt body having a caging bolt head at an upper end, an indicator coupled in an axial direction through the caging bolt body, a nut stopper coupled to an end of the indicator, the caging nut screw-coupled to an outer circumferential surface of the caging bolt body, and an elastic structure between the indicator and the caging bolt body.

The present invention relates to an electronic parking brake device for a vehicle, in particular a utility vehicle. As a function of at least one operating state of a towing vehicle parking brake supply line and/or a trailer parking brake supply line, a towing vehicle parking brake control valve is activatable by a control unit in such a way that a towing vehicle parking brake supply line can be deaerated or aerated by the towing vehicle parking brake control valve. By manually actuating a trailer parking brake control element, a trailer parking brake control valve is activatable by the control unit in such a way that a trailer parking brake supply line can be deaerated or aerated by the trailer parking brake control valve. The present invention also relates to a method for operating the above electronic parking brake device for a vehicle.