A method and a safety brake for a lifting device, wherein a solenoid or another electromechanical actuator is used to actuate a pawl, where the position of the pawl is monitored via at least two switches or sensors, where the lowering motion of the load or the lifting device is monitored and the safety brake is triggered in the event of a fault via a safety-oriented controller and at least one sensor, where the solenoid or the pawl is arranged such that, via spring force and/or gravity, the pawl is brought into engagement when the actuator, for example, the solenoid, is deenergized such that it is possible to exactly define and monitor the limit speed and, by using the two sensors, it is also possible to monitor the function and the motion of the pawl and to detect undesired operating states.

Disclosed is a railway braking system including a service brake supplied by a first source, a parking brake having a device for immobilizing the service brake and a mobile control device for mobile control of the immobilizing device, and a command and control unit configured to receive information indicative of a value of the first source, process information indicative of a parking brake setpoint so as to actuate the control device, and determine a value of a second source according to the setpoint and to the information indicative of a value of the first source, so as to supply a pressure chamber of the service brake.

During an operation of applying a parking brake, when sufficient brake clamping force is applied by a brake actuator, a parking lock actuator having a pin is energized to cause the pin to be moved toward a strut so that the strut is engaged with one of notches of a rotatable part operably connected with the brake actuator in order to prevent rotation of the rotatable part in one direction of releasing the brake and to allow rotation of the rotatable part in the other direction of applying the brake, and then the parking lock actuator is de-energized and the pin is moved away from the strut. During an operation of releasing the parking brake, the brake actuator rotates the rotatable part in the brake apply direction to disengage the strut from the notch, and then releases the brake.

Disclosed is an actuator for a parking brake. In accordance with an aspect of the disclosure an actuator for a parking brake includes a motor generating power; a reduction gear portion configured to transmit the power of the motor to a parking portion implementing a parking braking of a vehicle; a housing in which the motor and the reduction gear portion are accommodated; a housing cover for closing the housing; and a locking portion configured to limit rotation of the reduction gear portion; wherein the locking portion is configured to a locking member that is provided to be movable in an axial direction of the reduction gear portion and is close contact with or spaced apart from the reduction gear portion, an elastic member elastically supporting the locking member toward the reduction gear portion, an electromagnet member configured to separate the locking member from the reduction gear portion by generating an electromagnetic force when the power is applied.

A motor gear unit for a disc brake apparatus is provided. A speed reduction mechanism is connected to a first connection portion of a motor shaft of an electric motor. A non-excited operation type brake is connected to a second connection portion of the motor shaft.

In a state where the disc brake apparatus is attached to a vehicle body, the motor shaft is disposed so as to be orientated in an upper-lower direction, and the non-excited operation type brake is disposed above the electric motor.

An electric brake device installed on a vehicle, including: a rotary body to rotate with a wheel; a friction member to be pushed onto the rotary body; an actuator including an electric motor as a drive source to cause the friction member to be pushed onto the rotary body; and a controller to control a braking force generated by the electric brake device by controlling a supply current supplied to the electric motor, wherein the controller determines, by mutually different methods, a plurality of target supply current components each of which is a component of a target supply current as a target of the supply current, determines the target supply current by adding up the target supply current components, and changes contribution degrees of the respective target supply current components in the determination of the target supply current in accordance with a characteristic of the braking force to be generated.

A motor gear unit for a disc brake apparatus includes an electric motor, a speed reduction mechanism configured to transmit rotation of the electric motor to a plurality of rotary-to-linear motion conversion mechanisms arranged in a plurality of cylinders provided in a caliper, and a housing accommodating the electric motor and the speed reduction mechanism. The speed reduction mechanism includes a plurality of final gears connected directly or via another member to the plurality of rotary-to-linear motion conversion mechanisms and a power distribution mechanism that includes one support shaft and that is configured to distribute and transmit input power to the plurality of final gears. The power distribution mechanism is supported by the housing by supporting and fixing end portions of the support shaft on axially both sides to the housing.

An indoor exercise bicycle having a magnetic brake. The magnetic brake system has a pair of parallel arms each having a set of magnets. The pair of parallel arms moves along a track in a radial direction relative to the axis of the flywheel. The pair of parallel arms move toward and away from the flywheel not via a pivoting action. Instead, the pair of parallel arms moves linearly towards and away from the flywheel.

A disc brake (1) includes an electromechanical actuator (2), in particular an electromechanical parking brake actuator. The electromechanical actuator (2) includes a driveshaft (6), an electric motor (7) arranged on the driveshaft (6), a cam disc (5) arranged on an output shaft (49), and a transmission (8) arranged on the driveshaft (6) configured for transmitting the torque of the electric motor (7) to a force-transmission device (3). A magnetic brake (20) is disposed on the driveshaft (6) between the electric motor (7) and the cam disc (5) for arresting the driveshaft (6).

A brake handle structure for a bicycle contains: at least one body, at least one rotatory arm, at least one brake lever, at least one angle signal sensor, and at least one power failure sensor. The at least one body includes a connection portion, an extension, and an engagement portion. The at least one rotatory arm includes a pulling segment, a coupling orifice, and a receiving orifice. The at least one brake lever includes a fixing segment connected with at least one electromagnetic clutch which includes a bolt attracted electromagnetically by the at least one electromagnetic clutch after conducting a power, and a defining orifice is defined adjacent to the at least one electromagnetic clutch. The at least one angle signal sensor is configured to sense and send a rotating angle of the rotatable column. The at least one power failure sensor has a movable sensing head.