摘要:
A master cylinder in which a sleeve is provided inside a cylinder main body to define a first pressure chamber in cooperation with primary and secondary pistons. A plurality of through-holes adapted to communicate with an outlet port are disposed in the sleeve in such a manner as to be longitudinally spaced away from each other. positioning means is provided between the sleeve and the cylinder main body for positioning the sleeve with respect to the circumferential direction relative to the cylinder main body. The sleeve is positioned relative to the cylinder main body in such a manner that at least one of the plurality of through-holes adapted to establish communication between the outlet port and the first pressure chamber when the pistons are at their rearmost positions is located to face the top portion of the circumferential wall of the cylinder main body.
摘要:
A tandem type master cylinder for use in a vehicle hydraulic brake system and having a pressure proportioning valve integrally connected thereto includes a piston slidably received in a bore in the master cylinder and defining a pressure chamber at least on one side thereof, and an actuating member or a slide slidable in directions parallel to the piston and having a sensing end and an actuating end projecting respectively from opposite surfaces thereof. The sensing end passes through a slit formed in the circumferential wall of the bore to project into the pressure chamber in the master cylinder. The actuating end cooperates with a valve member of the pressure proportioning valve such that when the piston is displaced beyond a predetermined normal reciprocating stroke the actuating member is slidingly displaced to tilt the valve member, thereby deactivating the pressure proportioning valve.
摘要:
Air pressure servomotor including front shell and rear shell coupled to said front shell so as to construct a housing, a diaphragm disposed in the housing, a piston plate located adjacent the diaphragm, input rod and output rod. The front and rear shells hold a cylinder structure which extends axially from the wall of the front shell to the wall of the rear shell and supports the shells axially, and which has slits running from the forward end to the intermediate portion thereof. A valve having a valve mechanism is slidably disposed in the cylinder structure and having a valve mechanism. Said input rod is connected to the foot pedal and the output rod is connected to the master cylinder. And when the foot pedal is operated to actuate the input rod, the action of the input rod is amplified by the operation of the valve mechanism and the piston plate and transmitted to the output rod therethrough, and then the master cylinder is actuated. During this operation, the cylinder structure supports the front and rear shells and prevents them from deforming, so shortening of the stroke of the output rod by the deformation of the shells is avoided.
摘要:
A hydraulic braking pressure control valve for use in a vehicle includes a first inlet and outlet connected to a first pressure circuit, a second inlet connected to a second pressure circuit, a first piston having therethrough a liquid passage which normally connects the first inlet and outlet, a second piston receiving liquid pressure in the second inlet for displacing the first piston against the biassing force of a pressure control spring, and a valve mechanism associated with the first piston for closing the liquid passage when the first piston is displaced by a predetermined distance by the second piston. A plunger is provided with one surface thereof facing the first piston with the pressure control spring interposed therebetween and the other surface thereof receiving liquid pressure from the first pressure circuit, and an inertia valve is provided for cutting off the supply of liquid pressure to the other surface of the plunger at a predetermined deceleration of the vehicle.
摘要:
A lining wear warning device for a brake shoe lining rotatable member pivotally supported on a non-rotatable member so as to be engaged with a brake shoe carrying a brake lining is pivotally moved when the brake shoe is actuated; means arranged on the non-rotatable member in engagement with the rotatable member permits the movement of rotatable member during the braking operation and prevents the movement in the reverse direction when the brake is released; and an electric switch operative in response to a predetermined amount of relative movement between the rotatable and non-rotatable members closes a warning circuit, the relative movement between the rotatable and non-rotatable members being proportional to an amount of lining wear.
摘要:
The level detecting device comprises a detector inserted in a reservoir to detect the level of oil liquid, lead wires leading signal from the detector, and a terminal connected to the lead wires. The terminal is fixed to a cap covering an opening of the reservoir and the cap is removably engaged to a cylindrical projection arranged around the opening of the reservoir.
摘要:
A servo booster including a piston plate for receiving a differential pressure produced across two chambers which are defined in a shell casing, a cylindrical valve body having a valve mechanism therein for controlling the pressure across the two chambers, an aperture and a head portion formed respectively at the center portion of the piston plate and at an end portion of the valve body and being engageable with each other at a predetermined angular position, and the relative movement of the valve body and the piston plate in the direction of the axis of the servo booster being prevented by rotating the head portion through a predetermined angle in the aperture, wherein the improvement comprises a rotation preventing member rigidly mounted on the piston plate and having one portion thereof in fitting engagement with the valve body to prevent the relative rotation of the valve body and the piston plate.
摘要:
A master cylinder including a housing, a cylinder defined in the housing, a piston slidably fitted in the cylinder, a spring urging the piston toward an open end of the cylinder, a push rod for actuating the piston against the force of the spring to compress hydraulic fluid in the cylinder, and a stopper ring retained in the open end of the cylinder for abutting with the push rod to define the non-actuated position of the piston, wherein a seal is disposed between the inner periphery of the cylinder and the stopper ring and between the stopper ring and the push rod when the piston is in its non-actuated position.
摘要:
A hydraulic braking force multiplying device comprising an output member slidably fitted on a housing for actuating a piston of a hydraulic master cylinder, a working chamber defined between the housing and the output member, a valve seat member slidably fitted in an axial bore of the housing and rigidly secured to the output member, an input member slidably fitted in the axial bore and defining an intermediate chamber between the valve seat member, a valve member adapted to be actuated by the input member and having a valve portion of a valve mechanism for cooperating with a valve seat formed on the valve seat member, a pressure chamber permanently communicating with a source of pressure fluid being and being disposed in the housing and adapted to be connected with the intermediate chamber through the valve mechanism, a passage formed in the valve member for connecting the intermediate chamber with the working chamber, and a passage formed in the input member for connecting the intermediate chamber with a reservoir for hydraulic fluid, the connection through the passage in the input member being cut off when the input member engages with the valve member.
摘要:
A brake pressure control valve for controlling the pressure in two pressure circuits. The control valve includes two control valve units arranged side by side in a housing, and each control valve unit comprises a piston and a spring acting on the piston to determining a valve closing pressure. A device for adjusting the spring force of either one of the springs for adjusting the valve closing pressure of one control valve unit with respect to the other control valve unit.