Safety brakes for circular saw blades, circular saws that include the safety brakes, and methods of operating circular saws are disclosed herein. The safety brakes include a sensor assembly, a brake assembly, and an actuator assembly. The sensor assembly is configured to detect an actuation parameter and to generate a trigger signal responsive to detection of the actuation parameter. The brake assembly includes a brake cam and a brake pad. The brake cam is configured to selectively transition between a disengaged configuration and an engaged configuration and is configured to operatively engage a planar side surface of the circular saw blade. The brake pad includes a pad friction material and is positioned such that the pad friction material faces toward the brake cam. The actuator assembly is configured to selectively transition the brake cam from the disengaged configuration to the engaged configuration responsive to receipt of the trigger signal.

Various residual braking torque indication devices, systems, and methods are described. The devices, systems, and methods can include a sensorized brake pad. An output signal of the sensorized brake pad can be processed to provide an indication of a residual braking torque. The residual braking torque indicator can be calibrated to reference data to provide an actual measurement of the residual braking torque.

The present invention relates to a disc brake, and more specifically, to a disc brake apparatus using a generator-combined motor means, the disc brake apparatus comprising a fixed plate which has coil elements arranged radially and rotating plates which have magnet bodies arranged radially and corresponding to the coil elements, wherein: electric attraction between the fixed plate and the rotating plates enables primary braking and friction therebetween enables secondary braking, so as to minimize the occurrence of metal powder in a braking process, thereby preventing environmental pollution; and an electric reaction between the coil elements and the magnet bodies enables production of electricity, which can be used for power generation and to ensure electromotive power, thereby further improving use efficiency of the present invention.

A robotic gripper may be configured to dexterously manipulate an article. The robotic gripper may include two or more fingers containing one or more rotatable contacts each. The rotatable contact may transition between a rotation mode and a braking mode such that the contacts are free to rotate in the rotation mode and are prevented from being rotated in the braking mode. In some instances, the robotic gripper may make contact with the article via the contact pads. Thus, the robotic gripper may dexterously manipulate the article via the contact pads and brake.

A brake roller assembly may comprise: a shaft; a first roller bearing coupled to the shaft and disposed at a first axial end of the shaft a second roller bearing coupled to the shaft and disposed at a second axial end of the shaft; a roller cylinder disposed radially outward of the first roller bearing and the second roller bearing; and a braking arrangement, including a plurality of electrodes, and a plurality of rotor disks coupled to the roller cylinder, each rotor disk in the plurality of rotor disks disposed between an anode in the plurality of electrodes and a cathode in the plurality of electrodes.

The present invention discloses a brake-by-wire actuator based on motor-magnetorheological fluid clutch. The system includes a motor, a transmission mechanism and a floating-caliper disc mechanism. The transmission mechanism includes a magnetorheological fluid clutch, a planetary gear set and a ball screw set. The ball screw set includes balls, a ball screw and a sleeve. The floating-caliper disc mechanism includes a brake pad back plate, left and right brake pads, a caliper body, a brake disc and a guide rail. The motor and the magnetorheological fluid clutch cascaded in series, the linear motion of the sleeve of the ball screw set is achieved by the magnetorheological fluid clutch and the transmission mechanism. The sleeve pushes forward the brake pad back plate of the floating-caliper disc mechanism to clamp the brake disc by left and right brake pads, which accomplishes braking. The present invention uses a brake-by-wire actuator based on motor-magnetorheological fluid clutch, which not only has the advantages of fast response and improved braking security, but also solves the problem of the motor stalling during long time braking.

A sprag clutch has an inner race, an outer race, and a radial cavity between the races. A plurality of sprags are disposed in the radial cavity, and each sprag is configured to rotate about an axis of rotation that is perpendicular to its longitudinal axis. A sprag cage retains each of the plurality of sprags at a uniform spacing within the radial cavity, and a plurality of actuators are positioned to exert or withdraw a force upon a corresponding sprag.

Braking device inserted in a test bench (2) for checking the correct operation of industrial screwdrivers, wherein the braking simulates a tightening operation of such screwdriver, comprising a container body (1) on the top of which a coupling (11) protrudes, suitable for coupling with the head (3) of the screwdriver to be tested, said coupling (11) being connected, by means of a shaft (12), to a braking unit (13), an electronic torque and angle detector (14) of the shaft rotation (12). Such braking unit (13) comprises a plate (14), rotated by the screwdriver, which is braked by suitable friction surfaces (15) moved towards the plate by the movement of an actuator; the movement of such actuator is performed by means of at least one electronically controlled piezoelectric element (17).

The present invention discloses a motor-magnetostrictive actuator hybrid brake-by-wire system. The system includes a motor, a transmission mechanism, a magnetostrictive-driving piston mechanism and a floating-caliper disc mechanism. The transmission mechanism includes a planetary gear set and a screw set, and is driven by the motor. The linear motion of the sleeve is achieved by the planetary gear set and screw set. The sleeve pushes forward the piston head of the magnetostrictive-driving piston mechanism and the piston head pushes forward the brake pad back plate of the floating-caliper disc mechanism to clamp the brake disc, which accomplishes braking. The present invention uses the motor and the magnetostrictive-driving piston mechanism as a combined BBW system, which will simultaneously solve the problems of slow response, low precision and motor stalling effect of the only motor-driving braking systems and, also avoid the drawback of insufficient mechanical capabilities of the only magnetostrictive actuator-driving braking systems.

An example system includes a disk that is rotatable and has a plurality of ferromagnetic elements disposed in a radial array on a surface of the disk; and at least one electro-permanent magnet (EPM) mounted adjacent to the disk such that a gap separates the disk from the EPM. Applying an electric pulse to the at least one EPM changes a magnetic state thereof, thereby generating an external magnetic field that traverses the gap between the disk and the EPM and interacts with a ferromagnetic element of the plurality of ferromagnetic elements, and causing a rotational speed of the disk to change as the disk rotates.