摘要:
Actuator device for brakes suitable to be operatively connected to at least a first braking device acting on a brake disc or drum, so as to exercise a braking action, - the actuator device for brakes being fitted with a lever and/or pedal for its manual operation, and being provided with a body which houses at least one piston which acts on a hydraulic circuit fluidically connected to said at least one first braking device for the hydraulic operation thereof, - the lever and/or pedal being operatively connected to said piston so as to command its movement in an operating direction so as to exert pressure on the fluid of the hydraulic circuit, characterised in that the actuator device for brakes is fitted with an automatic actuator, operatively connected to the piston and/or to the operating lever and/or pedal so as to increase, control or reduce the braking action imposed manually by the operation of the operating lever and/or pedal, controlling the operating stroke of the piston.
摘要:
Provided is a vehicle speed control device with respect to which the speed at which a centrifugal brake operates can be easily changed from the outside without disassembling the device. A brake drum 11 is fixed to a vehicle body 101a. A brake shoe 23 rotates around a rotary shaft 20 of the wheel 101c, and reduces the rotation speed of the wheel 101c as a result of coming into contact with an inner circumferential side face of the brake drum 11. A spring 24 prevents contact between the brake drum 11 and the brake shoe 23 when the rotation speed of the wheel 101c is lower than or equal to a predetermined speed, and permits contact between the brake drum 11 and the brake shoe 23 when the rotation speed of the wheel 101c exceeds the predetermined speed. A position change mechanism 25 is installed within the brake drum 11, and changes the position of an end of the spring 24 on one end side. A transmission mechanism 26 transmits a force that is input by an external operation to the position change mechanism 25 and drives the position change mechanism.
摘要:
A parking brake device, wherein a lock mechanism (25) operated to mechanically lock a parking piston (24) at an advanced position according to the advancing operation of the parking piston (24) and operated to release the locking according to the action of a control fluid pressure for releasing parking is installed in a casing (23) at the rear of the parking piston (24) capable of providing a parking brake state by an advancing operation according to the action of the control fluid pressure for parking. The lock mechanism (25) comprises a lock piston (30) disposed at the rear of the parking piston (24) on an axis orthogonal to the axis of the parking piston (24) and acting a forward energizing force on the parking piston (24) at least when the parking piston (24) performs the advancing operation. Both end parts of the lock piston (30) are slidably fitted to and supported on the casing (23). Thus, the automatic parking brake state can be provided by a simple structure which does not consume electric power.
摘要:
The invention relates to a hydraulic vehicle brake system (1) having a preferably electromechanical brake booster (15). According to the invention, at least one wheel brake (5) is designed with a locking device (21) and, for a locking actuation, the brake booster (15) is actuated and the wheel brake (5) is locked in the actuated state.
摘要:
A parking brake device, wherein a parking brake state is provided by the advancing operation of a parking piston (44) slidably fitted to a casing (23) with its rear surface side facing a control fluid pressure chamber (47) for parking, and the advanced state of the parking piston (44) is mechanically locked by a lock mechanism (31). An insert shaft (59) and the casing (23) forming a part of the lock mechanism (31) are so formed that, when the parking piston (44) is positioned in a backward limit, each spherical body (58) is disposed on the radial inner side, and when the lock piston (56) is advanced to the advanced position according to the advancement of the parking piston (44) from the backward limit, each spherical body (58) is disposed on the radial outer side. Multiple lines of guide grooves having a curved surface shape in cross section recessed inward at a radius more than the radius of the spherical body (58) are formed in the outer surface of the insert shaft (59) in the axial direction of the insert shaft (59). Thus, the automatic parking brake state can be provided by a simple structure which does not consume electric power.