A pedal assembly comprises a pedal arm; a pedal plate provided on a second end of an elongated lever structure of the pedal arm; a vehicle mounting bracket; and a retainer. The retainer is installed on the pedal arm and is configured to operatively connect the pedal arm and an end portion of an operating member so as to transmit the movement of the pedal arm between a first and a second arm position to a functional system. The retainer is in an open position for insertion of the end portion of the operating member therein. The retainer is configured to move or to be movable from the open position to a closed position in which the retainer retains the end portion of the operating member received therein. The retainer is movable from the open position to the closed position by insertion of the operating member therein.

An electrically actuatable operating unit (106) for a motor vehicle brake comprises a housing body (122) which is arranged so as to be displaceable in a braking direction for operation of the motor vehicle brake, a recess (150) formed in the housing body (122), wherein the recess (150) is delimited at one longitudinal end by a contact shoulder (172), a through-opening (158) delimited by the contact shoulder (172), an operating member (124) which is arranged in the recess (150) so as to be displaceable for operation of the motor vehicle brake and projects through the through-opening (158) of the contact shoulder (172), wherein the operating member (124) can be arranged in a force-transmitting manner between a brake pedal and the motor vehicle brake (400). The operating unit (106) further comprises a return spring (126) which is arranged in the recess (150) and is configured to move the operating member (124) relative to the housing body (122) away from the contact shoulder (172), and a sleeve element (180) which circumferentially surrounds a portion of the operating member (124) at least partially and is held in contact with the contact shoulder (172) by the return spring (126), and wherein the sleeve element (180) projects into the through-opening (158) in such a manner that it is arranged between the operating member (124) and an inner circumferential surface of the contact shoulder (172) that delimits the through-opening (158).

An electrically actuatable operating unit (106) for a motor vehicle brake comprises a housing body (122) which is arranged so as to be displaceable in a braking direction for operation of the motor vehicle brake, a recess (150) formed in the housing body (122), wherein the recess (150) is delimited at one longitudinal end by a contact shoulder (172), a through-opening (158) delimited by the contact shoulder (172), an operating member (124) which is arranged in the recess (150) so as to be displaceable for operation of the motor vehicle brake and projects through the through-opening (158) of the contact shoulder (172), wherein the operating member (124) can be arranged in a force-transmitting manner between a brake pedal and the motor vehicle brake (400). The operating unit (106) further comprises a return spring (126) which is arranged in the recess (150) and is configured to move the operating member (124) relative to the housing body (122) away from the contact shoulder (172), and a sleeve element (180) which circumferentially surrounds a portion of the operating member (124) at least partially and is held in contact with the contact shoulder (172) by the return spring (126), and wherein the sleeve element (180) projects into the through-opening (158) in such a manner that it is arranged between the operating member (124) and an inner circumferential surface of the contact shoulder (172) that delimits the through-opening (158).

Disclosed herein is a master cylinder. The master cylinder according to the present embodiment includes a hydraulic block provided with a main bore formed therein in an axial direction, a first piston having one side inserted into the main bore to be displaceable and the other side exposed to an outside of the hydraulic block and connected to a brake pedal, a mounting block provided with a sub bore formed therein in the axial direction and the sub bore where the first piston is inserted thereinto to be displaceable and passes therethrough and a connection port connecting the sub bore and a reservoir, a cap provided on one side of the first piston, and a gap flow path formed by a gap between the first piston and the cap so that a first liquid pressure chamber partitioned by the first piston communicates with the connection port on the main bore.

Provided is a master cylinder for an electronic brake system. The master cylinder for the electronic brake system includes a pedal simulator provided between a first master piston and a second master piston and having a rubber member that provides reaction force to a brake pedal, and the first master piston includes a first piston and a second piston coupled to be movable relative to each other and having a communication channel to allow a pressing medium to flow between a reservoir and a first master chamber, a communication channel sealing member configured to block a portion of the communication channel according to a relative movement of the first piston and the second piston, and an elastic member configured to provide elastic force in a direction in which the first piston and the second piston are spaced apart.

A work machine includes a machine body, a travel device, a hydraulic drive, a pedal for performing a braking operation, an inching valve that changes a flow rate of a hydraulic fluid, and an adjuster that adjusts a stroke of an operation of the pedal. The adjuster includes a swing member that swings in coordination with an operation of the pedal and that is at a first position when the pedal is at an initial position of the stroke, a movement member that is capable of performing movement in contact with the swing member and that changes the first position by performing the movement in contact with the swing member, and a switching mechanism that is switchable between a first state in which the switching mechanism allows the movement of the movement member and a second state in which the switching mechanism prohibits the movement of the movement member.

A brake pedal structure for a saddled vehicle is configured to include a master cylinder supplying hydraulic pressure to a brake caliper of the saddled vehicle and a brake pedal connected to the master cylinder through a connection mechanism. The connection mechanism includes a holder, an arm, and a connection pin. The holder presses the master cylinder, the arm is fixed to the brake pedal, and the connection pin pivotally supports the holder and the arm so as to be swingable against each other. The connection pin includes a small diameter shaft, a large diameter shaft, and an arm support shaft. The small diameter shaft and the large diameter shaft are pivotally supported by the holder and have a circular cross section. The arm support shaft is pivotally supported by the arm and has a circular cross section. The arm support shaft is eccentric with respect to the small diameter shaft and the large diameter shaft.

A brake pedal structure for a saddled vehicle is configured to include a master cylinder supplying hydraulic pressure to a brake caliper of the saddled vehicle and a brake pedal connected to the master cylinder through a connection mechanism. The connection mechanism includes a holder, an arm, and a connection pin. The holder presses the master cylinder, the arm is fixed to the brake pedal, and the connection pin pivotally supports the holder and the arm so as to be swingable against each other. The connection pin includes a small diameter shaft, a large diameter shaft, and an arm support shaft. The small diameter shaft and the large diameter shaft are pivotally supported by the holder and have a circular cross section. The arm support shaft is pivotally supported by the arm and has a circular cross section. The arm support shaft is eccentric with respect to the small diameter shaft and the large diameter shaft.

A brake master cylinder assembly with adjustable fluid reservoir. The invention prevents air from entering a motorcycle hydraulic brake line by adjusting the fluid reservoir to be level with the ground of motorcycle operation. The brake handle remains parallel with the relative position of the handlebar the assembly is fastened to. All motorcycle brake master cylinders have a fluid reservoir and hydraulic piston that are in a fixed position relative to the handle and handlebar. The invention has a reservoir assembly which may be adjusted to any angle to keep the fluid reservoir level while the motorcycle is upright; allowing the motorcycle to have a brake handle and corresponding handlebar at any angle desired. The adjustable hydraulic fluid reservoir assembly prevents air from entering the brake line by reducing exaggerated angles incorporated with handlebar positions. The overall brake performance is therefore extended, mitigating risks' and extending service life.

A brake assistance system comprising a brake pedal, a booster motor, a simulation motor, a planetary row coupling node, and a brake master cylinder, where the brake master cylinder is configured to provide a braking force for the vehicle. The brake pedal, the booster motor, and the simulation motor are separately coupled to the planetary row coupling node. The planetary row coupling node is configured to convert a torque of the brake pedal, a torque output by the booster motor, and a torque output by the simulation motor into an acting force acting on a piston rod in the brake master cylinder.