The present invention relates to an anti-drag structure of automobile brake calipers, comprising a brake caliper body which is provided with a cylinder bore and a brake claw arranged along the axis of the cylinder bore in an extending mode; and a cylindrical piston bush is pressed in the cylinder bore by interference fit, a step ring groove is formed in the inner wall of the piston bush and composed of a major diameter ring groove and a minor diameter ring groove which have rectangular sections. The present invention can improve the generality of the brake caliper body through the arrangement of the piston bush and improve the standardization of production manufacturing of brake calipers, and can reduce the residual drag moment of the brake caliper and the fuel consumption with the rubber seal ring and the phenolic resin PF ring to achieve the purpose of emission reduction.

An elastic actuator includes a gear transmitting a rotational force; a mounting recess formed in a first side of the gear; a plurality of elastic wedges received in the mounting recess at positions that are spaced apart from each other in a circumferential direction of the mounting recess, each elastic wedge including a non-metal elastic material; a through-hole penetrating an elastic wedge among the plurality of elastic wedges; an output body configured to cover the first side of the gear; and at least one insertion bar protruding from a first side of the output body toward the first side of the gear and configured to be inserted into the through-hole. The elastic actuator further includes a shaft coupled to the output body and penetrating the gear, a protrusion having an inner space through which the shaft passes being formed to extend from the mounting recess toward the output body.

Provided is a method for manufacturing a brake pad used in a brake of a vehicle, which is capable of improving a limitation of separation of a friction material and a back plate of the brake pad. The method for manufacturing the brake pad includes manufacturing an intermediate plate and integrally pressing and molding a back plate and a friction material on both surfaces with the intermediate plate manufactured in a mold therebetween so that the back plate and the friction material are integrally coupled to each other by using the intermediate plate as a medium to manufacture the brake pad.

Resin-based electronic parking brake pistons, methods of making said pistons, and methods of using said pistons are disclosed, wherein each piston has a piston body made of a sole synthetic polymer material consisting of at least one reaction product obtained by reacting at least one formaldehyde with at least one phenol and/or at least one substituted phenol. Each piston may also have an internal contact area disposed in an interior of the piston body and configured to contact at least one spindle nut of at least one electromechanical parking brake system and/or an outer surface disposed on an exterior of the piston body and configured to be slidable within at least one caliper bore of at least one electromechanical parking brake system.

A magnetorheological braking device with a fixed holder and a first and second braking component. One of the braking components is connected to the holder and does not rotate relative thereto. The two braking components are continuously rotatable relative to one another. The first braking component extends axially, and the second braking component has a hollow shell part extending around the first braking component. A peripheral gap, filled with a magnetorheological medium, is formed between the first and second braking component. The first braking component has an electric coil and a magnetically conductive core extending axially. Magnetic field concentrators, on the core and/or the shell part, protrude into the gap, creating variable gap height. The electric coil is wound around a section of the core. A magnetic field of the electric coil runs through the core, magnetic field concentrators, and the gap into a wall of the shell part.

The invention relates to a braking mechanism (10) for an electric drive motor (1), in particular a drive motor (2) comprising an armature shaft (5) that protrudes from a motor housing (2); the braking mechanism (10) comprises at least one braking element (17) and an energy store, the energy store permanently applying a braking power to a frictional surface of the braking element. The braking mechanism (10) is characterized in that the energy store and the braking element (17) are made of the same material as a single piece.

A tactile feedback device (TFD) drum brake has a drum rotor that creates at least two gaps and at least four shear surfaces. Magnetically responsive (MR) material is disposed within the gaps. The TFD drum brake further has an upper and lower magnetic seal to prevent the migration of the MR material from the gaps. The drum rotor is thin and rapidly saturates when a magnetic flux is generated. Controllable torque is created when the drum rotor is saturated. The controllable torque provides feedback to an operator of vehicle with the TFD drum brake installed.

A power coupler for transferring rotary power from a rotary power device to a load device includes a shear thickening fluid (STF) and a chamber that contains the STF. The power coupler further includes a drive shaft housed radially within a drive side section of the chamber and protruding outward from an end of the chamber for coupling to the rotary power device. The power coupler further includes a load shaft housed radially within a load side section of the chamber and protruding outward from another end of the chamber for coupling to the load device. The power coupler further includes a drive turbine housed radially within the drive side section and coupled to the drive shaft. The power coupler further includes a load turbine housed radially within the load side section at a fixed operational distance from the drive turbine and coupled to the load shaft.

A friction part for a frictionally operating device includes an annular-disc-like friction surface rotatable about a rotational axis in a wet-running manner relative to a mating surface. The annular-disc-like friction surface is formed from a paper material and includes a meso-geometric or a micro-geometric uneven portion in order to create an axially deep friction region and an axially high friction region in the annular-disc-like friction surface. The axially high friction region is more strongly preloaded than the axially deep friction region when the annular-disc-like friction surface and the mating surface are axially pressed together.

A magnetorheological braking device has two braking components that are continuously rotatable relative to one another. A first braking component extends in the axial direction and the second braking component includes a hollow casing extending around the first braking component. A peripheral gap is filled with a magnetorheological medium. The first braking component has an electric coil and a magnetically conductive core which extends in the axial direction. A star contour with magnetic field concentrators on the core and/or on the shell part project into the gap, which results in a peripheral gap region with a variable gap height. The electric coil is wound around the core such that a magnetic field runs through the core and the magnetic field concentrators and through the gap into a wall of the casing. A star contour is formed by a stack of star plates.