135results about "Brake cylinders" patented technology

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).

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).

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).

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.

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).

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 seal assembly for mounting on a port of a spring brake actuator includes a plug, a check valve, and a cap. The plug receives the check valve for providing one-way air flow through the bore and maintaining about two psi in the spring brake chamber at zero stroke. An elastomeric member is secured to a first set of sections of the plug to seal against an inner surface of the port. The cap has arms sized to extend around a third set of sections of the plug and snap on the plug. A fourth set of sections of the plug elastically deform so the seal assembly can be easily mounted and unmounted from the port.

A parking brake assembly for an electronically controllable pneumatic braking system for a vehicle includes a parking brake unit having a supply connection to receive a supply pressure, a brake request connection to receive a parking brake request, and a parking brake pressure connection to provide a parking brake pressure. The parking brake assembly further includes a first ABS valve unit for a first channel and a second ABS valve unit for a second channel. The first ABS valve unit is configured to provide a pressure for a first spring-loaded brake cylinder at the first channel and to admit air to the first channel, in stages. The second ABS valve unit is configured to provide a second brake pressure for at least one second spring-loaded brake cylinder at the second channel and to admit air to the second channel, in stages.

An integrated pump device forms a module in which a motor (10), an oil pump (30) rotated by a driving force of the motor (10), and a hydraulic parking lock actuator (60, 70) are integrally constructed. The hydraulic parking lock actuator (60, 70) operates to switch between an advance state and a retard state by hydraulic pressure supplied from the oil pump (30), and locks a parking lock mechanism (80) of an automobile in the advance state and unlocks the parking lock mechanism (80) in the retard state. The oil pump (30) can supply oil for cooling or lubrication to an oil consumer (39) via the hydraulic parking lock actuator (60, 70).

The invention provides an automobile brake cylinder assembly with a double-seal leakproof structure, which comprises a brake control cylinder and a brake group, a main control component is arranged at the lower end of the brake control cylinder, the main control component comprises a first hydraulic oil cylinder and a main control cavity, and a brake interface is arranged at the lower end of the first hydraulic oil cylinder; the main control cavity is located on the upper side of the brake connector, a brake main rod is arranged at the lower end of the brake connector, and the lower end of the brake main rod and a brake pad at the upper end of the brake set are mutually fixed. The emergency control assembly comprises a second hydraulic oil cylinder for controlling the brake main rod to move up and down, a positioning structure for clamping and embedding the brake main rod and an emergency cavity located at the lower end of the brake connector. The problem that in the actual use process of current automobile brake parts, when main control breaks down, emergency control cannot be responded in time, and great potential safety hazards are caused is solved.

The invention relates to a brake cylinder comprising a service brake piston which is axially movable in a housing, which has a threaded spindle extension as part of an axially movable spindle, said brake cylinder having a locking device for locking the brake force, which locking device comprises at least two coupled coupling mechanisms, the service brake piston (1) being connected by a threaded connection to a first coupling element of the coupling mechanisms which is rotatably supported, which first coupling element can be connected to a second coupling element of the coupling mechanisms which is rotatably supported by a first coupling of the two couplings, which second coupling element which is rotatably supported can be connected to a third coupling element by a second coupling of the two couplings, and the second and third coupling elements are configured in such a way that a linear movement of at least one of the two coupling elements relative to the other coupling element results in a connection of the two coupling elements in the case of a second coupling.

The invention relates to a pressure providing arrangement for a brake system of a motor vehicle, the pressure providing arrangement having two pumps and at least one pressure-controlled first valve, the first valve deactivating one of the two pumps at a greater pressure. The invention also relates to a brake system having such a pressure providing assembly.

A method is for determining a brake cylinder pressure in a pneumatic brake system of a commercial vehicle, in which the brake cylinder pressure is estimated via a mathematical model. In a method with which the brake chamber pressure can be determined reliably without using a pressure sensor, the brake cylinder pressure is determined continuously as a function of an air mass flow, which is adjusted by an open or closed state of an electronically controllable solenoid valve arranged outside a control device for the brake cylinder pressure in an air supply line immediately upstream of a brake cylinder, and the physical properties of the air in the chamber of the brake cylinder while taking into account the currently predefined open or closed state of the solenoid valve.

The utility model discloses a steering knuckle for a new energy lightweight racing car, and relates to the technical field of improvement of automobile steering knuckles. The upper support arm mounting part, the steering pull rod mounting part, the lower support arm mounting parts, the brake cylinder fixing part and the main shaft mounting part are integrally formed, the upper support arm mounting part is located at the top, the two lower support arm mounting parts corresponding to each other up and down are arranged below the upper support arm mounting part, and the steering pull rod mounting part is located on the right side of the upper support arm mounting part. The brake cylinder fixing part is located on the left side of the upper support arm mounting part, the spacing part of the two lower support arm mounting parts is a main shaft mounting part, and the spacing part of the upper support arm mounting part and the lower support arm mounting part above the upper support arm mounting part and the spacing part of the brake cylinder fixing part and the main shaft mounting part are each provided with a weight reduction hollow-out position; an integrally-formed structure is adopted, the weight is light, the damage resistance strength is high, the circumferential rotation action during machining can be achieved, an operator only needs to stand at a clamping station for disassembly and assembly, in-situ machining of the operator is facilitated, the working safety is improved, and the machining quality and the finished product quality of the steering knuckle are guaranteed.

The invention relates to a method for determining the volume of liquid available in a reservoir (2) for brake fluid of a brake system (1), wherein the brake system (1) has a pressure generator (4, 9) which is fluidically connected on the one hand to the reservoir (2) and on the other hand to at least one brake circuit (8), which pressure generator can be actuated for generating a hydraulic pressure in the brake system (1) in the event of extraction of brake fluid from the reservoir (2), and wherein a predefined limit value (F) below the filling level for brake fluid in the reservoir (2) is monitored by means of a binary sensor (11) assigned to the reservoir (2). It is provided that the actuation of the pressure generator (4, 9) is monitored, and that the volume of liquid available is determined from the actuation of the pressure generator (4, 9) when the current filling level is below the limit value (F).

A spring brake actuator (2) for use in a commercial vehicle includes a cylinder housing (4) including a spring brake piston (10) for applying a braking force, a spring guide (12) attached to the spring brake piston (10). The spring guide (12) includes a valve (14) and a retaining device (16) for retaining the valve (14). The retaining device (16) includes a basic body (34) and clamping portions (36) for clamping the retaining device (16) to the spring guide (12). The clamping portions (36) are arranged at the basic body (34) along a circumference (38) thereof, and the clamping portions (36) are spaced apart from each other forming slits (40) between the clamping portions (36) to allow for a circulation of air through the slits (40).