摘要:
The invention relates to a disk brake that comprises a caliper (12), a main piston that is slidably mounted in a main hydraulic cavity of the caliper, a piston rod (120), and a wheel (140) for axially locking the piston rod (120). Said disk brake is characterized in that the locking wheel (140) is rotated by an electric motor (166) via an irreversible mechanical transmission (176, 144) in such a way that the locking wheel (140) is kept rotationally stationary when an output shaft (168) of the electric motor (166) is not rotated.
摘要:
The brake or coupling system (1) comprises a first piston (2) arranged in a first piston cylinder (3) thereby forming a first piston chamber (5) and a second piston (8) arranged in a second piston cylinder (9) thereby forming a second piston chamber (10). The first piston (2) is adapted to be displaced between a braking position and a rest position. The first piston (2) is spring biased in the direction of its rest position, and the second piston (8) is adapted to adjust a distance (X) provided between a friction element (6) and a rotatable element (7) in the rest position of the first piston (2) by means of adjustment of a volume of hydraulic fluid trapped in the second piston chamber (10). At least one spring element is arranged to act between the first and second pistons (2, 8). The first and second pistons (2, 8) are so arranged that a hydraulic pressure in the first and second piston chambers (5, 10), respectively, will urge the first and second pistons (2, 8) in opposite directions, thereby biasing the at least one spring element.
摘要:
A parking brake device, wherein the parking brake state of a wheel brake (2A) is provided by the advancing operation of a parking piston (44) slidably fitted to a casing (23) with its rear face side facing a control fluid pressure chamber (47) for parking, and the advancing state of the parking piston (44) is mechanically locked by the pushup of spherical bodies (58) by the advancement of the lock piston (56) of a lock mechanism (31). Multiple lines of guide grooves (126) for rollingly fitting a part of the spherical bodies (58) therein are formed in the inner surface of a large diameter hole (38), a restricting step part (42), and the inner surface of a small diameter hole (39) to have an inwardly recessed curved shape in cross section and to be extended in the axial direction of an insert shaft (59). Thus, the parking brake state can be provided by a simple structure which does not consume electric power.
摘要:
A parking brake system is provided in which a parking brake state is obtained by forward movement of a parking piston (44) slidably fitted into a casing (23) with the rear side of the parking piston (44) facing a parking control fluid pressure chamber (47), and the forwardly moved state of the parking piston (44) is mechanically locked by a lock mechanism (31). An insertion shaft (59) and a casing (23), which form part of the lock mechanism (31), are formed so as to position spheres (58) radially inward when the parking piston (44) is at a retreat limit and position the spheres (58) radially outward when a lock piston (56) moves to a forward position in response to forward movement of the parking piston (44) from the retreat limit, and a plurality of guide grooves extending in the axial direction of the insertion shaft (59) are provided on the outer face of the insertion shaft (59), the guide grooves having a concavely curved cross-sectional shape with a diameter that is equal to or larger than the diameter of the spheres (58). This enables an automatic parking brake state to be obtained by a simple structure without consuming power.
摘要:
The invention relates to a pneumatically actuated disk brake for utility vehicles, said disk brake comprising a single-part or multi-part caliper (3) which overlaps a brake disk (1) and can be pivoted or displaced in relation to a wheel axis or a wheel hub, an application device (5) which is arranged in the caliper (3) and is used to apply the brake, and an adjustment device. The invention is characterised in that the adjustment device comprises at least one adjustment unit (27) that can be directly actuated by means of compressed air, independently from the application device.
摘要:
L'invention propose un dispositif de freinage pour un véhicule automobile dans lequel un frein de service comporte un actionneur (16) pour provoquer le serrage de deux organes statique (24) et mobile (12), et dans lequel un frein de stationnement provoque un serrage continu des deux organes, en dehors de toute action continue du conducteur, pour immobiliser le véhicule en stationnement, caractérisé en ce que le frein de stationnement comporte un moyen commandé (22) de blocage mécanique des deux organes en position de serrage, et en ce que sa mise en oeuvre comporte les étapes successives consistant à commander l'actionneur (16) pour provoquer le serrage des deux organes (24, 12), puis à solliciter le moyen de blocage (22) pour maintenir les deux organes (24, 12) en position de serrage.
摘要:
A hydraulic motor brake (100) for providing load holding torque to a hydraulic motor (102) and comprising a housing, a plate (236) fixedly mounted within the housing, a piston (250) mounted for bidirectional translation relative to the plate along a longitudinal axis, and a plurality of friction-producing members (292) arranged such that the piston and plate at least partially define a brake release chamber (280) and the piston, normally biased in engagement with the friction-producing members to produce load holding torque, translates away from the plate and disengages from the friction-producing members to stop producing load holding torque in response to pressurized hydraulic fluid being received by the brake release chamber. The hydraulic motor brake further comprises a wear plate (106) with the brake housing and wear plate defining bores arranged in coaxial alignment with threaded bores of the hydraulic motor for detachably attaching the hydraulic motor brake to the hydraulic motor as a self-contained unit.