136results about "Brake wear compensation mechanism" patented technology

The present invention teaches a double-acting compression actuatable slack adjuster to adjust the slack in the brake rigging of a railway vehicle which includes a pair of elongated members movable with respect to each other in a longitudinal direction. A positioning device carrying a pair of opposed abutting surfaces is threadedly engaged with a threaded portion of the elongated rod. Pair of opposite facing abutment surfaces are positioned within the hollow housing. A first urging device is positioned to urge the positioning device into a disengaged position. A second urging device overcomes the force of the first urging device and urges an abutting surface on the positioning device into engagement with an adjacent abutment surface. A first overtravel control device is provided which is activated by a trigger device. A second overtravel control device is provided to prevent jamming condition of the positioning device with one of the abutment surfaces when the elongated rod is fully extended.

Provided is a compact brake cylinder device capable of increasing the brake force output from a brake output unit that moves along with a rod, without requiring the device to be made larger. A piston (24) sections off a pressure chamber (43) within a main cylinder (20a), surrounds the axial periphery of a rod (22), and moves in a direct line parallel with the direction of motion of the rod (22). With the supply of a pressure fluid to the pressure chamber (43) the piston (24) moves outward relative to the main cylinder (20a) in opposition to the biasing force of a rod-biasing spring (23). An oscillating member (46) of a force-multiplying mechanism (25) is biased by the piston (24) moving in the outward direction, oscillates, and biases the rod (22), causing the rod (22) to move in the forward direction. In this way, the force-multiplying mechanism (25) multiplies the drive force from the piston (24) so as to act on the rod (22). The brake output unit (21) moves in the forward direction along with the rod (22) and outputs brake force.

The present invention includes a braking system for a railway car generally including a brake cylinder having a cylinder rod. The cylinder rod is in mechanical communication with a lever transfer assembly and is configured to articulate said lever transfer assembly. The lever transfer assembly may be rotatably connected to a first brake assembly and connected to a rear brake assembly through respective connection rods. Actuating the lever transfer assembly with the cylinder rod generates a divergent braking force between the first and second brake assemblies for slowing and/or stopping the railway car.

The invention relates to a brake for a railway vehicle unit, which is provided with a brake box body, a brake release device (1) located on the brake box body, a spring stopping device (2) and a brake-shoe abrasion backlash compensation adjuster (3). A brake-shoe assembly (4) is located at the end part of the brake-shoe abrasion backlash compensation adjuster (3). The invention has the advantagesof simple integral structure, reasonable design, space saving, small volume, convenience for installation, uniform force and firm and wearable force propagation path segment. The brake release deviceis used for adjusting the brake-shoe directly via the brake-shoe abrasion backlash compensation adjuster and the spring stopping device can directly control the brake-shoe assembly via a spring stopping lever and the brake-shoe abrasion backlash compensation adjuster.

The invention relates to a pneumatic brake cylinder comprising a housing (19), a piston (1) that can be moved in the housing (19) and is used to transfer the pneumatic pressure to a brake, and a device for automatic adjustment in the event of wear of the brake linings, said device comprising a spindle (24), an adjusting nut (25), and a piston tube (23) that can be engaged with the adjusting nut (25). According to the invention, a torque applied to the piston tube (23) by the adjusting nut (25) is introduced by the piston tube (23) directly into elements (8) connected to the housing (19) in a fixed manner.

A rail vehicle brake slack adjuster comprises an axially movable, sleeve-shaped driver element (22) adapted to receive an axially applied braking force in a brake application direction, a spindle (16) axially movable within the driver element, an adjuster nut (34) in non-self-locking thread engagement with the spindle, clutch means between the driver element and the adjuster nut, and a barrel spring (30) biasing the spindle in the brake application direction. The adjuster has a combination of a first clutch (36) comprising a clutch surface on the driver element (22) directed in the brake application direction and a corresponding clutch surface on the adjuster nut (34) and a second clutch (38) comprising a clutch surface on the driver element (22) directed in the direction opposite to the brake application direction and a corresponding clutch surface on an adjuster nut sleeve (37). The adjuster nut sleeve (37) is axially movable on the adjuster nut (34).

A brake device includes: a damper; an advancing and retreating member; and a gap adjustment mechanism. The gap adjustment mechanism has: a control section having a control surface facing an opposite side to a braking direction; an operation member whose movement is controlled by contacting the control surface as the advancing and retreating member advances towards the braking side in the braking direction, thereby enabling relative movement with respect to the advancing and retreating member towards the opposite side to the braking direction; and a position adjustment section which, when the advancing and retreating member advances towards the braking side in the braking direction, and the operation member relatively moves with respect to the advancing and retreating member, changes an initial position of the advancing and retreating member according to the relative movement amount of the operation member.

A slack adjuster that is protected against environmental contaminants via a series of holes positioned circumferentially around each end and covered by a sleeve having a slot is aligned with one of the series of holes while covering the remaining holes. The sleeve protects against infiltration of contaminants at the ends of the slack adjuster and allows any contaminants that do infiltrate the slack adjuster to be expelled through the aligned hole and slot. The central portion of the slack adjuster may also be protected by including a series of circumferential holes that are selectively covered by a sleeve having a drain positioned to align with the lowest holes while covering the remaining holes.

A contaminant mitigation device for use with a slack adjuster for a railway brake rigging to protect the critical operating area of the slack adjuster. The critical operating area of a slack adjuster includes the components that are configured to operate together to adjust the brake rigging. The slack adjuster includes at least a main housing portion, a cone nut housing portion enclosing the critical operating area of the slack adjuster, and an overtravel housing portion. The contaminant mitigation device includes a sealing system configured for cooperating with at least one of the main housing portion, cone nut housing portion, and overtravel housing portion to seal the critical operating area against entrance of fluid and/or contaminants therein and/or to at least reduce the exposure of this area to fluid and/or contaminants. The contaminant mitigation device can also include a drainage system associated therewith.

The invention belongs to the technical field of brake gap adjusters and relates to a track locomotive braking clamp unit brake block gap adjuster. The track locomotive braking clamp unit brake block gap adjuster comprises a left box and a right box; a one-way torsional spring type friction clutch is arranged inside the left box; a frictional shaft is fixedly connected with a screw through threads; a connecting pipe is fastened on the left box; a frictional torsional spring tightly holds the connecting pipe and the frictional shaft always; a rotary arm sleeve is arranged on a driving shaft; a one-way bearing is arranged between the rotary arm sleeve and the frictional shaft; a bevel gear clutch is arranged inside the right box; a bevel gear pair is arranged between a limit gear of a manual adjustment nut and the right box; a compression spring is arranged on the right box and the limit gear; the manual adjustment nut and the right box are in engaged states always; the manual adjustment nut sleeves the external side of the screw and is in threaded connection with the screw. The track locomotive braking clamp unit brake block gap adjuster is reasonable in design, simple in structure, high in adjustment efficiency, small in occupied space, installed outside a brake cylinder and hinged to a braking clamp arm during utilization and convenient to assemble, disassemble and maintain and accurately achieves functions of self-compensating and manual adjusting of brake block gaps.

In a method of braking a number of rail cars of a train travelling on a mainline track, in response to a unique braking command provided to each rail car of a first subset of rail cars, wherein each braking command includes a level or percentage of braking the brakes of the rail car are to assume, the brakes of the rail car are set to level or percentage of braking included in the unique braking command provided to the rail car. Thereafter, in response to a unique braking command provided to each rail car of a second, different subset of rail cars, the brakes of the rail car are set to level or percentage of braking included in the unique braking command provided to the rail car.

An electro mechanical or pneumatically actuated disk brake, in particular for a utility vehicle, includes a brake caliper or saddle and a brake disk. The brake saddle overlaps the brake disk at least in sections of the outer periphery thereof. The disk brake also includes a tensioning device which is entirely or partially inserted into the brake saddle. The tensioning device is used to produce a tensioning movement between the brake linings and the brake disk. The disk brake further includes at least one, and preferably several, adjusting devices. The brake disk and/or the brake saddle are arranged on a stop with elastic pre-tension when the brake is in a release state. Braking is determined by a control method in a sensor-free manner during adjustment.

A corrective device for correcting uneven brake shoe wear on a brake mechanism for a railway vehicle, wherein the railway vehicle includes a brake beam having a tension beam coupled to a compression beam, a brake head with brake shoes provided at each end of the brake beams, and a slack adjuster. The corrective device is configured to cooperate with at least one of the compression beam and the slack adjuster to minimize or prevent the compression beam and the tension beam from rotating relative to the wheels and side frames of the railway vehicle. A braking system including the corrective device and a method for correcting uneven brake shoe wear on a brake mechanism for a railway vehicle is also provided.

An adjuster assembly (48) for automatically maintaining a uniform release clearance (and therefore a uniform stroke) for brakes and similar equipment. The adjuster assembly (48) comprises a continuous tube (62) and an expansion member (58) together having a combined length controlling the release clearance of selectively engageable friction parts. The expansion member (58) has an expansion device frictionally engaging the interior of the continuous tube (62) to effect progressive circumferential expansion of the continuous tube (62) when the expansion device is axially drawn through the continuous tube to compensate for wear of the friction parts during actuation and release of said selectively engageable parts. Unlike prior art adjuster assemblies, the continuous tube (62) advantageously has an end portion (70) processed differently from the balance of the continuous tube (62) for extending the usable portion of the continuous tube.

A drainage system for use with a slack adjuster for a railway brake rigging. The drainage system allows fluid and other contaminants to drain from the slack adjuster to prevent the fluid and contaminants from accumulating within the slack adjuster, contacting an operating area of the slack adjuster, and interfering with the operation of the slack adjuster. The slack adjuster includes a main housing portion, a cone nut housing portion enclosing a critical operating area of the slack adjuster, and an overtravel housing portion. The drainage system includes at least one aperture extending through a sidewall portion of the overtravel housing portion. The at least one aperture is configured to allow fluid and/or contaminants to drain there through to reduce exposure of the critical operating area to fluid and/or contaminants. A plug and/or patch can be provided to sealingly and/or removably engage the at least one aperture.

The invention relates to a shoe gap regulator for a railway vehicle. The shoe gap regulator comprises a box, a wedge-shaped block, a cross shaft, a regulating sleeve, a screw, a limiting sleeve and limiting plugs, wherein the regulating sleeve and the limiting sleeve are provided with first inserting grooves and second inserting grooves respectively in the axial direction, the limiting plugs are correspondingly inserted into the first inserting grooves and the second inserting grooves, and the contacting surface of the limiting sleeve is matched with the contacting surface a first nut in a gear meshed mode to form a first tooth-shaped clutch mechanism. When a first reset compression spring is compressed, the first nut and the limiting sleeve are separated. The contacting surface of the rear end of a second nut is matched with the contacting surface a brake supporting block in a gear meshed mode to form a second tooth-shaped clutch mechanism, the brake supporting block is fixed inside the regulating sleeve, and when a second reset compression spring is compressed, the second nut and the brake supporting block are separated. According to the shoe gap regulator, a traditional gap regulating mechanism is changed, various functions of the shoe gap regulator are achieved through the simple and reliable mechanisms, and reliability is high.

The invention relates to a method for producing a plastic housing, where at least one first plastic housing part with at least one guide or bearing for at least one mechanically movable component, in particular a sensor, is produced in a first molding step, the at least one first plastic housing part is overmolded in a second molding step while a second plastic housing part is being formed, in order to form an integral plastic housing. Moreover, the invention relates to a plastic housing with at least one first plastic housing part including at least one guide or bearing for at least one mechanically movable component, where the at least one plastic housing part is entirely or partially overmolded by a second plastic housing part so that the integral plastic housing is formed.

Embodiments of the invention provide one or more of the following features or combinations of such features to slack adjusters: rubber boots or bellows on either end of the slack adjuster to shed water away from the slack adjuster; a center vent and wasp excluder to vent any water build up in the slack adjuster clutch area; an added seal and wear ring at the slack adjuster end cap; and increased corrosion and wear protection for the rod.

The invention discloses a bidirectional compression type shoe gap adjuster, comprising a coupling head, a first cylinder, a second cylinder, a third cylinder and a hollow end cover which are connected in sequence; an adjusting nut is arranged inside the second cylinder, and a pull rod is arranged inside the first cylinder; a screw rod penetrates through the first cylinder, the second cylinder and the third cylinder; a first spring is sheathed on the pull rod, and a second spring is sheathed on the screw rod; one end of a operating lever is hinged on the coupling head, the lever body thereof penetrates through a lateral through hole of the coupling head and a transverse through hole of the pull rod simultaneously, and the other end of the operating lever is connected with a control lever through a control lever mounting hole. Besides, the control lever is used for adjusting the magnitude of force applied by first spring and the second spring on the adjusting nut; acted by the bidirectional force applied by the two springs, the adjusting nut moves between the first cylinder and the second cylinder and engages with or disengages from the two springs. The bidirectional compression type shoe gap adjuster is suitable for rail wagon brake devices, has a simple structure, and can adjust shoe gap automatically and precisely so as to provide even brake force for rail vehicles.

A vented cap for a main spring housing of a slack adjuster including an inner portion having an inner seal surface configured for cooperating with an elongated rod member and an outer seal surface configured for cooperating with a sidewall located at an end portion of the main spring housing. The vented end cap includes at least one opening configured to allow fluid and/or contaminants trapped within the slack adjuster and/or the end cap to drain therethrough. Various seals and/or drainage openings can also be provided along the slack adjuster to prevent the entrance of and/or allow for drainage of fluid/contaminants from the slack adjuster. A method for preventing the accumulation of fluid and/or contaminants within a slack adjuster and for protecting a critical operating area of the slack adjuster is also provided.