234results about "Brake cylinders" patented technology

An electropneumatic parking-brake valve unit for an electronically controlled pneumatic brake system has a first supply connection to a compressed air source. A spring brake connection connects to a spring brake cylinder of a vehicle. A parking-brake valve arrangement has a bistable valve switchable between switching states wherein a spring brake pressure can be controllable in dependence upon the switching state. A pneumatically switchable holding valve has a holding-valve connection for a first control pressure and the holding valve is connected between the first supply connection and the bistable valve. The holding valve is under a spring load into a first switching position wherein the bistable valve is connected to a deaerator. The bistable valve switches into a second switching position when the first control pressure exceeds a first threshold value. The bistable valve is connected to the first supply connection.

To provide an integrated pump device for preventing operation failures of hydraulic parking lock actuators caused by oil leakage or the like from a component which is arranged in a path to oil consumption equipment, the integrated pump device having an electric oil pump and the hydraulic parking lock actuators integrated to one another.SOLUTION: An integrated pump device serves as a module in which a motor 10, an oil pump 30 which rotates with drive force of the motor 10, and hydraulic parking lock actuators 60, 70 are integrated to one another. The hydraulic parking lock actuators 60, 70 operate so as to switch an advance state and a retreat state with hydraulic pressure supplied from the oil pump 30, lock a parking lock mechanism 80 of an automobile in the advance state, and releases the lock of the parking lock mechanism 80 in the retreat state. The oil pump 30 can supply cooling oil or lubrication oil to oil consumption equipment 39 via the hydraulic parking lock actuators 60, 70.SELECTED DRAWING: Figure 1

The invention relates to a method for determining a brake cylinder pressure in a pneumatic brake system of a utility vehicle, in which method the brake cylinder pressure (pBrkCyl) is estimated by means of a mathematical model. The invention relates to a method for reliably determining the pressure of a brake chamber without using a pressure sensor, according to the invention, the air mass flow () and the physical properties of the air in the chamber (13) of the brake cylinder (6, 7) are adjusted by means of the open or closed state of an electronically controllable solenoid valve (10, 11) arranged directly in front of the brake cylinder (6, 7) in the air supply line (4, 5) outside the control device (2) for the brake cylinder pressure (pBrkCyl). The brake cylinder pressure (pBrkCyl) is continuously determined taking into account a currently predetermined open or closed state of the solenoid valve (10, 11).

The present invention is an emergency braking and parking system, which is part of an automotive braking system. It includes a front axle air reservoir, a handbrake switch, a front axle parking valve, a rear axle parking valve, a rear axle air reservoir, a brake cylinder, and a spring brake cylinder. The various devices are connected by pipelines to form a safe and effective braking and parking system. It is applicable to the braking and parking of large, medium, and small trucks and trailers; in case of emergency, it can enable all the wheels of the whole vehicle to achieve rapid emergency braking and safe stopping, and when parking, it can make all the wheels of the whole vehicle play a parking role. In addition, by adding a computer controller, a solenoid valve, and a double-pass check valve, the present invention enables the emergency braking and parking system to be applicable to special vehicles, and in case of emergency, it can be operated through a control center or a third party to achieve emergency braking, safe stopping, and parking.

The invention relates to a length-adjustable assembly (100) comprising a connecting element (210) for connecting the assembly (100) to a component in such a way that the connection can withstand tensile and compressive loads, the connecting element (210) being plugged onto an axial end (110) along a longitudinal axis (LA) relative to the longitudinal axis (LA) of the assembly (100). The connecting element (210) comprises at least one locking arm (211) which is elastically bendable relative to the longitudinal axis (LA) in the mounted configuration of the connecting element (210) for plugging the connecting element (210) onto the end (110), wherein the at least one locking arm (211) comprises at least one locking element (212), wherein the at least one locking element (212) is adapted to cooperate with at least one mating locking element (112) of the end (110), the mating locking element (112) having a shape complementary to the locking element (212) and being assembled onto the end (110) along the longitudinal axis (LA) in the operating configuration of the connecting element (210). The invention also relates to a manufacturing method for an assembly (100).

The invention relates to a brake cylinder for a vehicle brake, in particular for a commercial vehicle brake, comprising a spring device, the spring device (1) for generating a braking force and / or a restoring force for releasing the brake in the stroke direction (H) of the brake cylinder having at least a first section (2), wherein the first section (2) has a basic extent extending substantially on a first section plane, the normal of which is aligned substantially parallel to the travel direction (H) and / or deviates from the travel direction (H) by a maximum of 10, and wherein the first section (2) has, in particular alternately along its basic extent, a first sub-section (3) and a second sub-section (4), wherein, in the unloaded state, the first partial section (3) is spaced apart from the first section plane in the positive travel direction (H), and wherein, in the unloaded state, the second partial section (4) is spaced apart from the first section plane in the negative travel direction (H), wherein the first and second sub-sections (3, 4) are designed such that the distance from the first section plane is smaller in a loaded state when a spring force is generated than in an unloaded state.

This invention relates to a disc brake (1) for commercial vehicles, the disc brake having a pneumatic brake cylinder (4), a brake disc, a brake caliper (3), a brake application device (7), and brake pads (8). The brake caliper (3) is engaged with the brake disc, and the brake application device (7), actuated by the brake cylinder (4), is arranged in the brake caliper (3). During braking, the brake pads (8) are pressed against the brake disc from both sides by the brake application device. An extendable and retractable piston rod (6) of the brake cylinder (4) engages with the brake application device (7), and the brake caliper (3) is secured by a fixing device (2). The device (2) is detachably fixed to the brake cylinder (4). It includes a screw (11a, 11b) with a screw head (12a, 12b), a screw shank (13a, 13b), and an external thread formed on the screw shank (13a, 13b). The device also includes at least one internally threaded hole (14a, 14b) formed in or on the brake cylinder (4). The screw shank (13a, 13b) is externally threaded into the at least one hole, and the screw head (12a, 12b) is locked onto the corresponding surface (15a, 15b) of the brake caliper (3). According to the invention, the centering device is designed and configured to center the pneumatic brake cylinder (4) and the brake caliper (3) relative to each other independently of the threaded connection between the at least one screw (13a, 13b) and the at least one hole (14a, 14b).

A trailer braking system including: a supply line (44) for connection to a continuous source of pressurised fluid; a spring brake, which has an apply position and a release position, and the spring brake moves to the release position when pressurised fluid is provided at or above a threshold; a spring brake control valve (10), which controls the flow of fluid to the spring brake; an immobiliser (80) having a brake release position and an immobilise position, which control the flow of pressurised fluid to the spring brake control valve, such that when in the brake release position, the spring brake control valve is operable to cause the flow of pressurised fluid into the spring brake or to vent the spring brake chamber depending on the fluid pressure present, and when in the immobilise position, in which the spring brake control valve is not operable, and a shunt valve (46') including a first port connectable to the supply line, a second port connectable to the spring brake control valve, a third port connectable to a brake reservoir (40), and a fourth port connectable to the immobiliser, the shunt valve having a first and second state, wherein in the first state, the first and second ports are connected, and in the second state, the second and fourth ports are connected to the third port.

The invention relates to a spring brake actuator (1) for an air brake system of a motor vehicle, in particular of a commercial vehicle, comprising a brake cylinder (2) having a spring chamber (12), a parking pressure chamber (14), and a spring brake piston assembly (9) that is movably disposed inside the brake cylinder (2) and sealingly separates the spring chamber (12) from the parking pressure chamber (14), wherein the spring chamber (12) comprises a compression spring (11) that is configured to push the spring brake piston assembly (9) from a retracted position towards an extended position as a function of pressurized air being released from the parking pressure chamber (14), wherein the spring brake piston assembly (9) is configured to move towards the retracted position as a function of pressurized air being introduced into the parking pressure chamber (14); and an internal breather valve (21) in fluid communication with the spring chamber (12) and configured to allow for pressure compensation in the spring chamber (12) when the spring brake piston assembly (9) moves towards the extended position. It is proposed to mount the internal breather valve (21) to the spring brake piston assembly (9) in direct fluid communication between the spring chamber (12) and the parking pressure chamber (14).

The invention relates to a method for operating a motor vehicle (1) having a hydraulic braking installation (8) comprising at least one controllable first hydraulic actuator (14) and a controllable second hydraulic actuator (16). 【Means for solving the problem】 The motor vehicle (1) is decelerated by controlling one of the selected hydraulic actuators (14, 16) depending on the deceleration setting. The current wear state (V1) of the first hydraulic actuator (14) is determined, the current wear state (V2) of the second hydraulic actuator (16) is determined, and it is intended that the selection of one of the hydraulic actuators (14, 16) is made depending on the determined wear states (V1, V2).

A spring brake actuator for a vehicle includes a spring brake housing defining a spring brake chamber, a service brake housing defining a service brake chamber, a push rod configured to extend from the service brake chamber to engage a wheel brake of the vehicle, and an actuator rod in the spring brake chamber and movable to extend into and retract from the service brake chamber. As the spring brake chamber is pressurized, air flows from the spring brake chamber through the actuator rod to the service brake chamber, and as the spring brake chamber is depressurized, air flows from the service brake chamber through the actuator rod to the spring brake chamber.

The invention relates to a brake release mechanism (24) for a spring brake actuator (2), in particular a parking or emergency spring brake actuator (2) for use in a commercial vehicle (1), wherein the spring brake actuator comprises a spring brake piston assembly (8) and an actuator power spring (6) configured to push the spring brake piston assembly (8) from a retracted position towards an extended position, said brake release mechanism (24) comprising a brake release bolt (30) that is configured to be rotatably mounted to the spring brake actuator (2), having a first bolt portion (31) that is configured to extend inside of the spring brake actuator, and a second bolt portion (32) that is configured to extend outside of the spring brake actuator (2), said first bolt portion (31) comprising a threaded portion (34), and the second bolt portion (32) comprising an operating section for operating the brake release bolt (30) when mounted to the spring brake actuator (2), and a running nut (12) engaging the threaded portion (34), said running nut (12) being configured to axially travel along the threaded portion (34) in order to move a spring brake piston assembly (8) against the actuator power spring (6). It is proposed that the operating section is a tool interface (14) that is integrally formed on the brake release bolt (30).

The invention relates to a control mechanism (105) configured to equip a rail system and including a casing (106) from which a control rod (109) projects, configured to be mechanically and securely connected to a control cable (107) actuatable at a distance from or in proximity to the casing, a plate (115) mechanically connected to the casing and from which the control rod projects, and a locking / unlocking device (135) positioned in a recess (124) provided in the plate and having a stable position, the control mechanism being configured so that, when the control cable is mechanically connected to the control rod, the locking / unlocking device is elastically moved away from its stable position to allow the partial introduction of the control cable in the plate as far as a position in which the control cable is mechanically and securely connected to the control rod.

The invention relates to a brake release mechanism (24) for a spring brake actuator (2), in particular a parking or emergency spring brake actuator (2) for use in a commercial vehicle, said release mechanism (24) comprising a brake release bolt (30) having a threaded portion (34) and an operating section (14) for operating the brake release bolt (30) when inserted into a spring brake actuator (2), a running nut (12) engaging the threaded portion (34), said running nut (12) being adapted to axially travel along the threaded portion (34) in order to move a spring brake actuator piston (8) against a force of an actuator power spring (6), an interface nut (22) attached to said operating section (14) of the brake release bolt (30), wherein the interface nut (22) and the operating section (14) each comprise at least one bore section (36a, 36b) that form a common bore (38) when the interface nut (22) is attached to said operating section (14), and a locking element (40) that is inserted in said bore (38) for blocking the interface nut (22) relative to the operating section (14). In particular, it is proposed that the locking element (40) is configured as a locking ball (42).

A combined service brake and parking brake cylinder (1) for actuating a service brake and a parking brake has a spring-loaded parking brake cylinder (2) with a housing (4) which is cylindrical at least in sections, a spring-loaded parking brake piston (21) and at least one accumulator spring (22) which loads the parking brake piston (21) in an actuating direction of the parking brake, wherein the parking brake piston (21) is displaceably guided on a radially inner circumferential surface of the parking brake cylinder (2), and the parking brake piston (21) and the housing (4) delimit a parking brake chamber (23) which can be ventilated by a parking brake pressure, a service brake cylinder (3) and a service brake piston (31), wherein the service brake cylinder (3) and the service brake piston (31) delimit a service brake chamber (33) which can be acted upon and vented by a service brake pressure, a piston rod (5) coupled to the parking brake piston (21) and the service brake piston (31), wherein the service brake cylinder (3), viewed radially, is arranged inside the parking brake cylinder (2), wherein the housing (4) of the parking brake cylinder (2) is closed at a first end face by a cover (6) provided with an opening (61), into which a first end portion (53) of the piston rod (5) projects, wherein an annular seal (7) is arranged between an outer circumference (51) of the piston rod (5) and an inner circumference of the opening (61) of the cover (6, wherein the seal (7) has a first sealing segment (71) which is designed as an annular lip which rests on an outer end face (62) of the cover (6), preferably on an outer end face of a sleeve (8) of the cover (6), and functions as a pressure relief valve to allow pressurized air to escape into the environment.

The vehicle brake system can reduce the number of parts, reduce the cost, avoid large-scale structural elements of the system, and improve the pressure boosting performance of brake hydraulic pressure at the same time. A vehicle brake system is provided with a hydraulic pressure generation device (1) having an assist cylinder (30) for generating brake hydraulic pressure by driving an electric actuator (36), and a hydraulic pressure control device (2) for controlling the brake hydraulic pressure acting on a wheel brake on the basis of the brake hydraulic pressure from the hydraulic pressure generation device (1). A hydraulic pressure control device (2) is provided with: a pressure regulating valve (R) that is provided in a hydraulic pressure passage that communicates with a wheel brake and that can regulate the difference in brake hydraulic pressure between the hydraulic pressure generation device (1) side and the wheel brake side, an open passage (C), a pump (45), and a supply unit (15); brake fluid discharged from a wheel brake flows into the open passage (C); a pump (45) that sucks the brake fluid in the open passage (C) and discharges the brake fluid to the hydraulic passage; the supply unit (15) is provided on the upstream side of the assist cylinder (30) and is capable of storing brake fluid. The open passage (C) communicates with the supply unit (15).

A brake booster assembly having a brake booster body and a pushrod as well as a pushrod-pedal coupler are provided. The pushrod travels along a pushrod axis when being pushed. The brake booster assembly includes a pushrod-pedal coupler. The pushrod-pedal coupler comprises a pushrod-attachment end arranged on the pushrod and defining a longitudinal axis parallel to the pushrod axis. A pedal-attachment end is configured to be attached to a pedal and having a pedal pivot axis around which the pedal pivots when being pushed. The pedal pivot axis extends across the longitudinal axis. A coupler hinge is arranged between the pushrod-attachment end and the pedal-attachment end and connects the pushrod-attachment end with the pedal-attachment end. The coupler hinge has a coupler hinge axis that extends across the longitudinal axis and the pedal pivot axis. The pedal pivot axis and the coupler hinge axis are offset along the longitudinal axis.

The utility model relates to a motorcycle brake lower pump assembly which comprises a pump body, an oil pipe joint and an oil inlet bolt, a threaded hole is formed in the pump body, a mounting hole is formed in the end of the oil pipe joint and communicated with an inner cavity of the oil pipe joint, and a first channel is formed in the oil inlet bolt and communicated with the inner cavity of the oil pipe joint. The oil inlet bolt penetrates through the mounting hole and then is in threaded connection with the interior of the threaded hole, so that the first channel is communicated with an inner cavity of the oil pipe joint and an inner cavity of the pump body, a threaded section connected with the oil inlet bolt is arranged on the side wall of the mounting hole, and the threaded section is located on the side, close to the pump body, of the inner cavity of the oil pipe joint. The oil inlet bolt and the oil pipe connector are connected into a whole, relative collision force generated by vibration of the oil inlet bolt and the oil pipe connector is weakened, and therefore abrasion of the connecting position of the oil inlet bolt and the oil pipe connector is weakened.

The application discloses a combined service brake and energy storage brake cylinder, which comprises a shell, a parking brake push rod and a brake piston, the shell is internally provided with a service brake cavity, an energy storage brake cavity and a brake parking cavity, the parking brake push rod is internally provided with a breathing valve, the breathing valve comprises a valve body, an exhaust valve piston, an actuator element, a loading spring and an adjusting spring, the valve body is internally provided with a first cavity, a second cavity and a sealing surface, one end of the actuator element is arranged in the second cavity, the other end penetrates through the valve body and is fixed with the shell, the exhaust valve piston is slidably arranged in the first cavity, the loading spring is connected with the valve body and the exhaust valve piston, so that the exhaust valve piston is pressed against the sealing surface on the side of the second cavity and unidirectionally separates the first cavity and the second cavity, and the adjusting spring is connected with the exhaust valve piston and the actuator element. The application provides a combined service brake and energy storage brake cylinder, and the stroke of the exhaust valve piston in the breathing valve can be reduced.

The invention relates to a brake system, in particular to a brake system for braking a road vehicle and a brake system providing method. A brake system (20) for a vehicle comprises: a rotary brake element (22) fixedly connected to a wheel or an axle in common rotation with the wheel and having a plane of rotation (222); a stationary braking element (24, 26) fixedly connected with respect to the vehicle chassis so as not to rotate together with the wheels; a first brake actuator (38) configured for actuating the stationary brake element (24, 26) to urge the stationary brake element (24, 26) towards the rotary brake element (22); a second brake actuator (40) configured for actuating the stationary brake element (24, 26) to urge the stationary brake element (24, 26) towards the rotary brake element (22); a lever (32) configured such that the lever transmits a force applied by the first brake actuator (38) or the second brake actuator (40) to the fixed brake element (24, 26), where the first brake actuator (38) is connected to the lever (32) via a first connector portion (386) and the second brake actuator (40) is connected to the lever (32) via a second connector portion such that when the second brake actuator (40) is actuated, the force applied by the first brake actuator (38) or the second brake actuator (40) is transmitted to the fixed brake element (24, 26). The second brake actuator (40) is decoupled from the first brake actuator (38).

Diaphragm arrangement (100) for a spring brake actuator (250) of a pneumatic braking system (210) of a vehicle (200a), in particular utility vehicle (200b); wherein the diaphragm arrangement (100) is adapted to enable a mechanical interaction between a piston pipe (255) of the spring brake actuator (250) and a push rod (260); and the diaphragm arrangement (100) comprises an outer diaphragm member (110), an inner diaphragm member (120) and a piston plate (130), wherein the outer diaphragm member (110) is at least partially outwardly arranged from the inner diaphragm member (120) and from the piston plate (130); the piston plate (130) is adapted to be deflected together with the pushrod (260); the outer diaphragm member (110) is adapted to be mounted to a housing (251) of the spring brake actuator (250); the outer diaphragm member (110) comprises a central opening (111); the inner diaphragm member (120) and / or the piston plate (130) is arranged to cover the opening (111); and the outer diaphragm member (110), the inner diaphragm member (120) and the piston plate (130) are fixated to each other.

Divider arrangement (100) for a spring brake actuator (250) for a pneumatic braking system (210) for a vehicle (200a), in particular utility vehicle (200b); wherein the spring brake actuator (250) comprises a parking brake pressure chamber (251), a service brake non-pressure chamber (252), a service brake pressure chamber (256) and a diaphragm (253) to separate the service brake non-pressure chamber (252) from the service brake pressure chamber (256); the divider arrangement (100) comprises an annular shaped divider (110) and a support member (120); the divider (110) is adapted to receive the diaphragm (253) and to divide the parking brake pressure chamber (251) and the service brake pressure chamber (256) from each other; the divider (110) is made of plastics; and the support member (120) is arranged and adapted to mechanically and / or structurally support the divider (110).

To provide a unit brake device which eliminates a need for temporary attachment of the unit brake device and facilitates attachment work of the unit brake device.SOLUTION: A unit brake device 1 includes: a brake cylinder 20 which is driven by compressed air supplied from a bogie side pipe 16 fixed to a bogie; a pressing part which is driven by the brake cylinder 20 and presses a brake shoe 2 to a tread of a wheel of the bogie; a housing part 31 which covers the pressing part; a bogie side attachment part 10 to which the housing part 31 is attached in a state of being fixed to the bogie, and provided with a bogie side connection port 13 connected with the bogie side pipe 16; and a brake side pipe 26 for connecting an intake port 20A of the brake cylinder 20 with the bogie side connection port 13. The brake side pipe 26 is fixed to the housing part 31 so as to connect the intake port 20A with the bogie side connection port 13 when the housing part 31 is attached to the bogie side attachment part 10.SELECTED DRAWING: Figure 6

The present invention proposes that an external force piston (5) is radially guided only in an axially limited guide section (6) in an external force cylinder bore (4) of a hydraulic block (2) of a hydraulic assembly (1) of a hydraulic external force vehicle brake system, and the external force cylinder bore (4) is configured with a larger diameter axially outside the guide section (6). A brake fluid channel (11) passes through the guide section (6) to the mouth of a brake fluid line (15).

The invention relates to a brake system (B) for a rail vehicle, comprising a brake cylinder (1), to which a brake device (8) is operatively connected, the brake device (8) being adapted to brake a wheel (R) of the rail vehicle, the brake cylinder having a pressure chamber (1a); a control device (6) for the service brake pressure; a control device (7) for parking brake pressure; a valve device (4) which is adapted to connect a regulating device (6) for a service brake pressure or a control device (7) for a parking brake pressure to a pressure chamber (1a) of the brake cylinder (1); a latching device (2) which is adapted to fix the position of the braking device (8) in a latched state in order to prevent a release and in a released state has no influence on the position of the braking device (8), the parking brake pressure is independent of the service brake pressure adjusted by the adjusting device (6) for the service brake pressure. In this way, the parking brake can be implemented in a simple, reliable and cost-effective manner.

A vehicle braking system includes brakes, a body, a braking linkage, a service brake comprising a braking piston movable relative to the body to act on the braking linkage and delimiting a service brake pressure chamber to place the braking piston in a service braking position. A parking brake acts on the braking piston and has a working configuration and a resting configuration. The parking brake includes a blocking device movable relative to the body to act on the braking piston and having a first position and a second position in which the blocking device is configured to immobilize the braking piston in a service braking position. A control device is movable relative to the body and has a locking position to hold the blocking device in the second position. A service brake indicator device receives information representing supply and / or venting of the service brake pressure chamber.

A brake system for a motor vehicle includes a control valve, a redundancy valve, a brake valve, a brake cylinder, a pressure fluid source, an electronic control unit, a parking lock, and a depressurized tank. The control valve and the redundancy valve are mechanically preloaded in a closed state, whereas the brake valve is mechanically preloaded in an open state. The electronic control unit is configured to control the brake valve so that it moves into a closed state so that pressure fluid flows out of the brake cylinder via the brake valve directly into the depressurized tank, and no pressure fluid is fed into the brake cylinder via the control valve or the redundancy valve and the brake valve, if the control valve or the redundancy valve remains in an open state due to a mechanical defect and otherwise should be in the closed state.