JP4809282B2 - Brake cylinder device and brake caliper device - Google Patents

Abstract

The invention relates to a brake pressure cylinder device and a brake caliper device; the brake pressure cylinder device has a common brake mechanism, a spring brake mechanism, a push rod and a projection length adjusting mechanism; the projection length adjusting mechanism has a leading part which is mounted on the push rod by moving together with the push rod and acting on the established resistance when the push rod moves for adjusting the projection length projected from the cylinder body. The projection length adjusting mechanism further has a recess arranged in the leading part, and a limiting mechanism; the limiting mechanism has a blocking part blocked with the recess arranged between a second piston and a first spring for limiting the movable area of the first piston on the movable direction.

Description

  The present invention includes a brake cylinder device that includes a push rod for operating a vehicle brake mechanism, and that can automatically adjust the protruding length of the push rod from the cylinder body when the brake is operated, and the brake cylinder device thereof The present invention relates to a brake caliper device.

  With regard to a brake cylinder device capable of automatically adjusting the protruding length of the push rod from the cylinder body, in Patent Document 1, a push rod connected to a brake shoe for braking the wheel tread is provided in the cylinder. And a friction ring assembly having a configuration in which one elastic ring is sandwiched between two discs to expand radially outward to increase frictional sliding resistance with the cylinder inner surface. Is disclosed. In Patent Document 1, when the brake shoe wears during brake operation, the output piston and the friction ring assembly move according to the amount of wear, while the friction ring assembly has a large sliding resistance when the brake is loosened. Therefore, it is described that a corresponding gap can be secured between the brake shoe and the wheel tread as a result. In Patent Document 1, a stepped shaft is attached to the center portion of the friction ring assembly by a nut, and an end plate is fixed to one end face of the output piston by an attachment screw, and formed at one end of the stepped shaft. A structure in which a loose spring is disposed between the flange and the end plate is disclosed, and the relative momentum between the output piston and the friction ring assembly is limited so as not to exceed a predetermined gap. Are listed.

  Moreover, as a brake mechanism for a railway vehicle, in Patent Document 2, there is a service brake means that is used during normal operation and that is operated with pressure air, and is used when a vehicle is stopped for a long time without pressure air. A configuration of a brake cylinder device that can operate both spring brake means that operates by a spring force is disclosed.

Japanese Patent Publication No. 6-67725 (Claim 1, FIG. 2) Japanese Patent Laid-Open No. 63-125835

  With respect to a brake cylinder device provided with a service brake means and a spring brake means as disclosed in Patent Document 2, the length of the push rod protruding from the cylinder body during brake operation as disclosed in Patent Document 1 is set. It is conceivable that the convenience as a brake cylinder device is further improved by providing a protrusion length adjusting means that can be automatically adjusted.

  However, in Patent Document 1, only a configuration including a friction ring assembly is disclosed as the above-described protrusion length adjusting means, and as a means for regulating the relative momentum between the output piston including the push rod and the friction ring assembly. Only a special configuration having a stepped shaft or the like corresponding to the protruding length adjusting means by the friction ring assembly is disclosed. For this reason, regarding the brake cylinder device including the service brake means and the spring brake means, if the protrusion length adjusting means having the configuration of Patent Document 1 is incorporated, the mechanism becomes complicated and enlarged. In the case of a brake cylinder device including a service brake means and a spring brake means, the range and adjustment in which the protrusion length of the push rod is adjusted by the protrusion length adjustment means using the special configuration disclosed in Patent Document 1. It is difficult to realize a means for regulating the range that is not performed.

  In view of the above circumstances, the present invention includes a service brake means, a spring brake means, and an adjustment means for adjusting the protrusion length of the push rod, and can suppress the complexity and enlargement of the mechanism, and the protrusion length of the push rod is adjusted. It is an object of the present invention to provide a brake cylinder device that can also realize a means for regulating a range that is not adjusted and a range that is not adjusted with a simple mechanism, and a brake caliper device including the brake cylinder device.

Means and effects for solving the problems

  A brake cylinder device according to a first invention for achieving the above object is a brake cylinder device used in a brake mechanism for a vehicle, wherein the first spring and the first pressure chamber act in opposite directions. And the first brake moves relative to the cylinder body against the urging force of the first spring by supplying a pressure fluid to the first pressure chamber and moves in the brake direction. Means, a push rod movable together with the first piston, and the push rod movable together with the push rod so that a predetermined resistance force acts when the push rod relatively moves in parallel with the moving direction of the first piston. A guide member attached to the push rod, and the length of the push rod protruding from the cylinder body in the moving direction of the first piston when the brake is released is applied to the brake. A projecting length adjusting means for adjusting, a second spring and a second pressure chamber acting in opposite directions and a second piston through which the push rod passes, and pressure fluid is supplied to the second pressure chamber A spring brake that moves the second piston in the braking direction by the biasing force of the second spring and biases the push rod via the service brake means by shifting from the applied state to the discharged state And the protrusion length adjusting means has a recess or a protrusion provided in the guide member, and an engagement portion that engages with the recess or the protrusion. The second piston and the first And a regulating means for regulating a movable range of the guide member in the moving direction of the first piston while being arranged between the spring and the spring.

According to the present invention, the push rod that moves together with the first piston of the service brake means passes through the second piston of the spring brake means, and a predetermined resistance acts between the push rod and the guide member of the protrusion length adjusting means. It has become. For this reason, in a brake cylinder device provided with a service brake means, a spring brake means, and a protrusion length adjusting means, the mechanism can be made compact by preventing complication and enlargement. The protrusion length adjusting means includes an engaging portion that is disposed between the second piston and the first spring and engages with a concave portion or a convex portion provided in the guide member, and has a movable range of the guide member. The control means which consists of a simple structure which controls this is provided. For this reason, the range where the protrusion length of a push rod is adjusted and the range which is not adjusted can be controlled with a simple mechanism.
Therefore, according to the present invention, it is provided with the service brake means, the spring brake means, and the adjusting means for adjusting the protruding length of the push rod, and the complexity and enlargement of the mechanism can be suppressed, and the adjustment range and adjustment of the protruding length of the push rod can be suppressed. It is possible to provide a brake cylinder device that can be realized by a simple mechanism as a means for regulating the range that is not performed.

  The brake cylinder device according to a second aspect of the present invention is the brake cylinder device according to the first aspect, wherein the restricting means is configured such that the engaging portion engages with the concave portion or the convex portion, whereby the shaft of the first piston of the guide member. The movable range of the rotation direction centering on the is also restricted.

  According to this configuration, the rotation preventing function of the guide member can also be achieved by the concave portion or the convex portion and the regulating means having the engaging portion that engages with the concave portion or the convex portion. For this reason, the function of restricting the movable range of the guide member in the moving direction of the first piston and the function of preventing rotation can be realized by one restricting means, and a simpler mechanism can be achieved.

  The brake cylinder device according to a third aspect of the present invention is the brake cylinder device according to the first or second aspect, wherein the concave portion or the convex portion is provided at a plurality of locations in the guide member, and the engaging portion is the concave portion or the convex portion. Are provided at a plurality of locations in the restricting means.

  According to the present invention, by providing a plurality of pairs of corresponding recesses or projections and engagement portions, it is possible to disperse and bear the load acting on the engaging portions, and the recesses or projections or engagement It is possible to reduce wear generated at the portion and improve durability.

  The brake cylinder device according to a fourth aspect of the present invention is the brake cylinder device according to any one of the first to third aspects of the present invention, wherein the restricting means includes a region where the service brake means is disposed in the cylinder body and the spring brake. An opening through which the guide member passes is formed at a central portion of the partition wall, and the engaging portion forms the opening. The opening is provided at an edge portion, and the opening is formed so that the guide member can pass through the opening without engaging the recess or the protrusion and the engagement portion when the brake cylinder device is assembled. The gap between the outer diameter of the guide member and the edge of the opening is formed in a size that allows the entire circumference to exist.

  According to the present invention, since the restricting means is provided as a partition wall that divides the area of the service brake means and the area of the spring brake means, the restricting means can be formed thin in a flat plate shape and can have a simple configuration. . For this reason, the restriction means having a simple configuration can be arranged in the brake cylinder device with high space efficiency. When assembling the brake cylinder device, the guide member can be passed through the opening of the partition wall through a predetermined gap without engaging the concave portion or the convex portion with the engaging portion. It can be performed easily and the efficiency of assembly work can be improved.

  A brake cylinder device according to a fifth invention is the brake cylinder device according to any one of the first to fourth inventions, wherein a radial center position of the guide member is eccentrically positioned with respect to a radial center position of the opening. As described above, the partition wall and the guide member are arranged.

  According to the present invention, when the brake cylinder device is assembled, the guide member can be passed through the opening of the partition wall through the predetermined gap without engaging the concave portion or the convex portion with the engaging portion. By decentering the center of the guide member with respect to the center, it can be easily realized with a simple configuration.

  A brake cylinder device according to a sixth invention is the brake cylinder device according to any one of the first to fifth inventions, wherein the protrusion length adjusting means is formed by repeatedly arranging irregularities in the movement direction of the push rod on the outer surface of the push rod. And an elastic member disposed between the push rod and the guide member, and the guide member is formed with a space for opening at least the uneven surface side. When the elastic member is disposed, the elastic member is deformed and engaged with the uneven surface to connect the guide member and the push rod, and when a predetermined force or more acts on the guide member, the elastic member However, the push rod is displaced with respect to the guide member by overcoming the convex portion of the irregular surface by deformation.

Conventionally, for example, according to the configuration described in Patent Document 1, since the sliding resistance is generated only by the frictional force between the flat cylinder inner peripheral surface and the elastic ring surface, the surface state and wear of the cylinder inner peripheral surface, The sliding resistance of the friction ring assembly tends to become unstable due to wear on the surface of the elastic ring. In addition, since adjustment is performed using an adjustment screw, adjustment and management of sliding resistance may be complicated.
However, according to the present invention, the elastic member deforms and engages (engages), so that the frictional force or coupling force between the push rod and the guide member can be stabilized. Thereby, adjustment and management of sliding resistance can be easily performed with a simple configuration.

  The brake cylinder device according to a seventh aspect of the present invention is the brake cylinder device according to any one of the first to sixth aspects, wherein the protrusion length adjusting means further includes a shaft rod that moves together with the first piston and to which the push rod is attached. The push rod is formed in a cylindrical shape having a shaft hole extending in parallel with the moving direction of the first piston, and a female screw is threaded on at least a part of the inner surface of the shaft hole. A male screw that engages with the female screw is screwed into at least a part of the screw and is inserted into the shaft hole.

  According to this invention, since the push rod is attached by being screwed to the shaft rod that moves together with the first piston, it is possible to adopt a configuration in which the projection length of the push rod is absorbed by the shaft rod moving with respect to the push rod. become. For this reason, even when the protruding length of the push rod is adjusted, it is possible to prevent the displacement of the first piston with respect to the cylinder body and to realize a configuration that keeps the volume of the first pressure chamber substantially constant.

  The brake cylinder device according to an eighth aspect of the present invention is the brake cylinder device according to any one of the first to seventh aspects, wherein the protrusion length adjusting means is the guide member and the second piston disposed around the push rod. And an outer cylinder member that moves together with the first piston. The spring brake means has the second piston moved in the braking direction. When the second piston is engaged with the outer cylinder member, the push rod is urged through the outer cylinder member and the first piston of the service brake means.

  According to this invention, the second piston can be urged by pushing the push rod by engaging with the outer cylinder member that is disposed between the guide member and the second piston and moves together with the first piston. Therefore, by arranging the outer cylinder member that can be configured in a simple shape, it is possible to realize a configuration in which the push rod is biased via the service brake means when the second piston moves in the braking direction with a simple mechanism. it can.

  As another aspect of the invention, an invention of a brake caliper device including any one of the above-described brake cylinder devices may be configured. That is, the brake caliper device according to the ninth invention is equipped with the brake cylinder device according to any one of the first invention to the eighth invention and the brake cylinder device, and can move relative to the vehicle carriage in the axle direction. A caliper body mounted in such a manner that a braking force is generated by sandwiching an axle-side disk by a pair of brake members attached to the caliper body by operating the brake cylinder device. .

  According to this invention, it has the service brake means, the spring brake means, and the adjustment means for the protrusion length of the push rod, and can suppress the complexity and enlargement of the mechanism, and is not adjusted with the range in which the protrusion length of the push rod is adjusted. A brake caliper device including a brake cylinder device that can be realized by a simple mechanism as a means for regulating the range can also be realized.

  A brake caliper device according to a tenth aspect of the invention is the brake caliper device according to the ninth aspect of the invention, wherein the caliper body is swingable about an axis parallel to the traveling direction of the vehicle with respect to the carriage via a swing pin. The brake cylinder device mounted on the brake caliper device includes a first pressure fluid passage communicating with the cylinder body to the first pressure chamber, and a second pressure fluid passage communicating with the second pressure chamber. The first pressure fluid passage opens from the first pressure fluid passage to the outside of the cylinder body, and the pressure fluid is supplied and discharged from the first pressure supply passage and the second pressure fluid passage to the outside of the cylinder body and pressure. The second supply / exhaust port through which the fluid is supplied / discharged is disposed so as to be positioned vertically below the swing pin.

  According to the present invention, since the first supply / discharge port and the second supply / discharge port are positioned vertically below the swing pin, when supplying the pressure fluid to the first pressure chamber through the first supply / discharge port, In both cases when supplying the pressure fluid to the second pressure chamber via the second supply / exhaust port, it is possible to prevent the caliper body and the brake cylinder device from generating a moment in the swinging direction. For this reason, it is possible to suppress uneven contact of the restrictor with the disk during the emergency of the pressure fluid, and to suppress uneven wear of the restrictor.

  The brake caliper device according to an eleventh aspect of the invention is the brake caliper device according to the ninth aspect of the invention, wherein the brake cylinder device provided in the brake caliper device is formed as a cylindrical elastic body and is provided on the outer periphery of one end portion. A threaded portion is provided, and the threaded portion is screwed into the cylinder main body to be connected to the cylinder main body and communicates with the inside of the cylinder main body. And a filter formed of a rigid body and disposed at a position corresponding to the portion that is present.

  According to the present invention, the filter can be attached together with the through-cylinder by simply screwing the through-cylinder provided with the filter into the cylinder body with the threaded portion at the end thereof. And since the filter is arrange | positioned inside the through-cylinder, the member for exclusive use for attaching a filter etc. becomes unnecessary. Therefore, the through cylinder can be easily and quickly attached to the cylinder body together with the filter, and the filter attaching operation can be simplified.

  The brake caliper device according to a twelfth aspect of the invention is the brake caliper device according to the ninth aspect of the invention, wherein the caliper body has a pair of brake levers whose one end is driven by the brake cylinder device provided in the brake caliper device, A pair of brake retainer holding portions that are respectively attached to the other end sides of the pair of brake levers and hold the brake device; and leg portions that protrude from the lower end side of the brake wheel holding portion. Features.

  According to the present invention, when the brake caliper device is removed and placed on the floor or the like for maintenance work of the brake caliper device, the dimensions of the leg portions are appropriately set, so that the one end side of the caliper body is set. The brake caliper device can be placed in a horizontal state between the lower end portion and the leg portion. For this reason, maintenance work etc. can be performed easily and work efficiency can be improved.

  A brake caliper device according to a thirteenth aspect of the invention is the brake caliper device according to the ninth aspect of the invention, wherein the caliper body has a pair of brake levers whose one end is driven by the brake cylinder device provided in the brake caliper device, A pair of brake retainer holding portions that are respectively attached to the other end sides of the pair of brake levers and hold the brake restrictor, and a brake shoe mounting structure for attaching the brake restrictor to the brake retainer holding portion; The control member holding part is provided with a key groove formed so that a key part formed on the control member to be attached / detached extends vertically downward, and the control member mounting structure is provided below the control member holding part. A latch that is supported so as to be able to swing and is biased by a spring in the direction of the axle to be locked with the key portion to support the control device, and a lower portion of the control device holding portion. A snap pin for restricting the swinging of the latch in a direction in which the lock between the control and the latch is released by being inserted, and a connecting chain for connecting the latch and the snap pin. Features.

According to the present invention, it is possible to realize a structure in which the control member can be easily attached and detached by the latch that is urged by the spring (for example, a leaf spring) in a direction different from the attaching / detaching direction of the control member. And it is possible to prevent the latch from being unlocked simply by inserting the snap pin below the restrainer holding portion. That is, in exchanging the control, by removing the snap pin, releasing the latch lock prevention, and rotating the latch against the leaf spring or the like in preparation for dropping of the control, The control wheel can be removed reliably. Even when installing a new control, the latch is locked by a leaf spring or the like when the key part of the control is slid into the key groove of the control part holding part and reaches a predetermined position. Therefore, it can be easily attached. Further, since the latch and the snap pin are connected by the connecting chain, a configuration for preventing the snap pin from being detached and preventing the loss can be easily realized.
Accordingly, it is possible to easily replace the control of the brake so that the support of only the control can be freely released without causing an inadvertent dropping of the control. It is possible to provide a brake caliper device that does not require troublesome and skillful work to prevent loosening.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. Note that a brake cylinder device according to an embodiment of the present invention and a brake caliper device including the brake cylinder device will be described by taking as an example a case of being used as a brake mechanism for a railway vehicle. In addition, the ratio of the component of each drawing is drawn with the precision equivalent to a design drawing.

  FIG. 1 is a schematic view of a brake caliper device 1 for a railway vehicle according to an embodiment of the present invention as seen from the axle direction. FIG. 2 is a schematic view of the brake caliper device 1 in FIG. 1 as viewed from the brake cylinder device 2 side in parallel with the traveling direction of the vehicle. FIG. 3 is a schematic view of the brake caliper device 1 as viewed from below in FIG. As shown in FIGS. 1 to 3, the brake caliper device 1 according to this embodiment is a disc brake type brake mechanism.

  A brake caliper device 1 shown in FIGS. 1 to 3 includes a brake cylinder device 2 and a caliper body that is equipped with the brake cylinder device 2 and is mounted so as to be relatively movable in the axle direction with respect to a vehicle carriage 100. 11, a pair of back plates (branch holder holding portions) 12 and 12 that respectively hold a pair of brake pads (branches) 14 and 14, and the brake pads 14 are attached to the pair of back plates 12 and 12, respectively. For example, a pair of restrictor mounting structures 13, 13, leg portions 18 disposed below the back plate 12, and a parallel guide mechanism 23 disposed below the caliper body 11. ing.

  The brake caliper device 1 operates as a brake car wheel (not shown) of a railroad vehicle by a pair of brake pads 13 and 13 attached to the caliper body 11 via a back plate 12 when the brake cylinder device 2 is operated. A disc-shaped brake disc 15 that is an axle-side disc that rotates in conjunction with the rotation is sandwiched to generate a braking force. That is, the brake disk 15 is formed in a disc shape having front and back braking surfaces 15a and 15a formed so as to be orthogonal to the rotation axis, and when the brake cylinder device 2 is operated, the brake pads 13 and 13 are moved. The brake discs 15a and 15a are pressed against both sides of the brake disc 15 from both sides in a direction substantially parallel to the rotation axis direction of the brake disc 15 (perpendicular to the paper surface in FIG. 1).

  As shown in FIGS. 1 to 3, the caliper body 11 includes a coupling member 16 and a pair of brake levers 17 and 17. The coupling member 16 is attached to a bracket 100a fixed to the bottom surface of the carriage via a swing pin 16a so as to swing about an axis parallel to the traveling direction of the vehicle. The pair of brake levers 17 and 17 are installed so as to be swingable with respect to the coupling member 16 via a pair of fulcrum pins 17a. The fulcrum pin 17a is installed so as to extend in a direction perpendicular to the axial direction of the swing pin 16a in plan view.

  The brake cylinder device 2 is attached to one end side of the pair of brake levers 17 and 17 via a cylinder support pin 12b, and one end side is driven by the brake cylinder device 2. The pair of brake levers 17 and 17 is attached with a pair of back plates 12 and 12 holding the brake pad 14 on the other end side via a fulcrum pin 17a with respect to one end side to which the brake cylinder device 2 is attached. It has been. The back plate 12 is swingably attached to the brake lever 17 via a support pin 12a extending in parallel with the fulcrum pin 17a. In addition, a leg 18 projecting in a rectangular parallelepiped shape is provided on the lower end side of each back plate 12. The protruding length of the leg portion 18 is set so that the size corresponds to the lower end position of the cylinder support pin 17b, and the end portion of the leg portion 18 and the lower end of the cylinder support pin 17 are in a substantially horizontal plane. Considered to be placed. For this reason, when the brake caliper device 1 is removed from the carriage 100 and placed on a horizontal floor surface or the like during maintenance work or the like, the end of the leg 18 and the lower end of the cylinder support pin 17b are grounded. The brake caliper device 1 can be placed horizontally.

  4 is a perspective view of the brake pad 14, and FIG. 5 is a plan view of the brake pad 14 (FIG. 14A) and a cross-sectional view taken along the line AA (FIG. 14B). It is. As shown in FIGS. 3 and 4, the brake pad 14 has a shape substantially along a part of the arc of the brake disc 15, and a key portion 14 a is formed on the side opposite to the surface in contact with the brake disc 15. Has been. As shown well in FIG. 5, the key groove 14 is formed in the back plate 12 so as to substantially match the outer shape of the key portion 14a so that the key portion 14a of the detachable brake pad 14 extends from below vertically. 12b is provided. Accordingly, the brake pad 14 is attached to the back plate 12 so that the key portion 14a is fitted in the key groove 12b while sliding.

  As well shown in FIGS. 1 and 3, the brake member mounting structure 13 for mounting the brake pad 14 held in a state where the key portion 14 a and the key groove 12 b are fitted to the back plate 12 is provided on the back plate 12. It is provided at the bottom. This restrictor mounting structure 13 includes a latch 19, a snap pin 20, a connecting chain 21, and the like.

  The latch 19 is an elongated flat plate-like member disposed on a surface perpendicular to the brake disk 15, and one end side of the latch 19 is pivotally supported below a back plate 12 via a pin (not shown). As shown well in FIG. 3, a protrusion 19a is formed on the side of the latch 19 that faces the brake pad 14. The protrusion 19a has a shape that fits in the key groove 12b. The brake pad 14 is prevented from falling downward by coming into contact with the lower end surface of the key portion 14a. When the end portion 19b on the other end side of the latch 19 is pulled outward (toward the side opposite to the brake disc 15), the protrusion 19a of the latch 19 and the key portion 14a of the brake pad 14 are locked. It is to be released. Further, the latch 19 is biased in the axle direction by a leaf spring 22 supported in a cantilevered manner on the leg portion 18 on the same side as the side pivotally supported by the lever 19, so that the key portion The brake pad 14 is supported by being engaged with 14a.

  As shown well in FIGS. 1 and 3, the snap pin 20 is formed by bending a single rigid wire into a coil shape about once and a half to form a spring portion 20a, and then only one end side of the spring portion 20a. The curved portion 20b is formed by bending in a wave shape. Further, a straight portion 20c is provided on the other end side of the snap pin 20 where the curved portion 20b is not formed. The snap pin 20 is inserted into the back plate 12 so that the straight portion 20c is inserted into a pin hole provided in the lower portion of the back plate 12, and the curved portion 20b is fitted in a groove portion also provided in the lower portion of the back plate 12. It is. As described above, when the snap pin 19 is inserted into the back plate 12 with the latch 19 engaging the brake pad 14, the latch 19 is positioned so as to be sandwiched between the curved portion 20b and the straight portion 20c. It is supposed to be. As a result, the snap pin 20 is inserted into the lower portion of the back plate 12 to restrict the swing of the latch in the direction in which the brake pad 14 and the latch 19 are unlocked, and the engagement between the brake pad 14 and the latch 19. It is possible to prevent the stoppage from coming off.

  The snap pin 20 is attached to the latch 19 by a connecting chain 21 provided so as to connect the snap pin 20 and the latch 19. That is, one end of the connecting chain 21 is fixed by being tied to one place of the latch 19, and the other end is attached to the spring portion 20 a of the snap pin 20. The snap pin 20 needs to be inserted / removed every time the brake pad 19 is replaced, and since it is a small part, it is easy to lose, but by having such a connecting chain 21, the loss prevention function can be easily realized. The connecting chain 21 is a flexible continuous body, and may be any fiber as long as it is difficult to cut even after long-term use, such as a wire wire or a resin wire. It may be.

  As shown in FIGS. 1 and 3, the parallel guide mechanism 23 includes a pair of guide members 24 a and 24 b and a pair of guide rods 25 a and 25 b. Each of the guide members 24 a and 24 b has a portion that is bent in a U shape, and one end side thereof is fixed to the back plate 12. One end side of the guide rod 25a is fixed to the other end side of the guide member 24a, and the other end side of the guide rod 25a is inserted into a through hole formed in the other end side of the guide member 24b in a loosely fitted state. Yes. Similarly, one end side of the guide rod 25b is fixed to the other end side of the guide member 24b, and the other end side of the guide rod 25b is inserted into a through hole formed on the other end side of the guide member 24a in a loosely fitted state. ing. The guide rod 25a and the guide rod 25b are arranged in parallel. By such a parallel guide mechanism 23 composed of a pair of guide members 24a and 24b and guide rods 25a and 25b, the brake cylinder device 2 is operated and the brake lever 17 is swung so that the back plate 12 and the pair of brake pads 14 and When the 14 moves in the approaching direction (in the direction in contact with the brake disc 15), the pair of brake pads 14 and 14 are guided so as to perform a substantially symmetrical operation with the brake disc 15 interposed therebetween.

  In the brake caliper device 1 described above, as will be described later, the cylinder body 26 side of the brake cylinder device 2 is attached to one brake lever 17, and the push rod 28 is attached to the other brake lever 17, and the operation of the air cylinder device 2 is performed. Thus, the push rod 28 is projected or retracted. Accordingly, the vicinity of the cylinder support pin 17b of the pair of brake levers 17 and 17 is driven so as to be separated from each other or close to each other. Therefore, the pair of brake levers 17 and 17 operate with the fulcrum pin 17 a as a support shaft, and the brake disc 15 is sandwiched between the brake pads 14. At this time, in the pair of brake levers 17, 17, the brake pad 14 provided on one brake lever 17 comes into contact with the braking surface 15 a of the brake disk 15 first. Then, the other brake lever 17 presses the brake pad 14 against the braking surface 15a of the brake disc 15 by using a reaction force received from the brake pad 14 that contacts the braking surface 15a. As a result, the brake disk 15 is sandwiched between the pair of brake pads 14 and 14, and the rotation of the brake disk 15 is braked by the frictional force generated between the brake pads 14 and 14 and the braking surfaces 15a and 15a. The rotation of the wheels of the railway vehicle provided coaxially with the brake is braked.

  Next, the brake cylinder device 2 according to the present embodiment will be described in detail. Both ends of the brake cylinder device 2 in the brake operation direction are coupled to the cylinder support pins 17b. As shown in FIG. 6 which is a cross-sectional view of the brake cylinder device 2, the brake cylinder device 2 includes a cylinder body 26, a service brake means 27, a push rod 28, a spring brake means 29, a protrusion length adjusting means 30 and the like. Configured.

  The cylinder body 26 includes a first casing part 31 and a second casing part 32, and forms an internal space 26a. In the internal space 26 a, a part or all of the constituent elements such as the service brake means 27, the push rod 28, the spring brake means 29, and the protruding length adjustment means 30 are disposed. The first casing part 31 has a substantially cup shape (cylinder shape) with a bottom, and the second casing part 32 is fixed by a bolt 33 so as to close the open side of the first casing part 31. As a result, an internal space 26a is formed. Moreover, the edge part of the 1st casing part 31 is connected with the brake lever 17 by the cylinder support pin 17b.

  The service brake means 27 includes a first spring 34, a first pressure chamber 35, and a first piston 36 as main components. The first piston 36 is disposed so as to partition the internal space 26 a, and is airtightly fitted to the inner peripheral surface of the first casing portion 31 and is slidable in the axial direction with respect to the first casing portion 31. It is arranged. A first pressure chamber 35 is configured by a space partitioned by the first piston 36 and the first casing portion 31. In order to improve the airtightness of the first pressure chamber 35, a cup packing 38 is attached to the first piston 36. The cylinder body 26 is provided with a first pressure fluid passage 37 communicating with the first pressure chamber 35, and the first pressure chamber 35 is used as a pressure fluid as a working fluid via the first pressure fluid passage 37. Compressed air is supplied. A first supply / exhaust port 37a that opens from the first pressure fluid passage 37 to the outside of the cylinder body 26 and that supplies / discharges compressed air is vertically downward with respect to the swing pin 16a (see FIGS. 1 and 2). It is arranged to be located in.

  Further, the first spring 34 is disposed on the opposite side of the first pressure chamber 35 via the first piston 36 in the internal space 26a, and biases the first piston 36 toward the first pressure chamber 35 side. It is arranged to do. With these configurations, the service brake means 27 is such that the first spring 34 and the first pressure chamber 35 act opposite to the first piston 36 in the opposite direction, and compressed air is supplied to the first pressure chamber 35. Thus, the first piston 36 moves relative to the cylinder body 26 against the urging force of the first spring 34 and moves in the brake direction (the direction of arrow A in FIG. 6).

  The push rod 28 is formed in a cylindrical shape having a shaft hole extending in parallel with the moving direction of the first piston 36, and a female screw 39 is screwed in the vicinity of the end on the first pressure chamber 35 side on the inner peripheral surface of the shaft hole. It is engraved. Further, the outer peripheral surface of the push rod 28 has an uneven surface 40 formed by repeatedly arranging the unevenness in the moving direction of the push rod 28. The height difference of the unevenness of the uneven surface 40 is, for example, about 0.3 mm, and the uneven surface 40 constitutes a part of the configuration of the protruding length adjusting means 30. Further, a cylinder support pin 17 b of the brake lever 17 is connected to the tip of the push rod 28 via a connecting member 41, and the driving force by the brake cylinder device 2 is transmitted to the brake lever 17 of the caliper body 11. Making it possible. The connecting member 41 and the push rod 28 are fixed by pins or the like in order to restrict the rotation around the relative axis. In addition, between the push rod 28 and the second casing portion 32, a dust-proof permitting is provided so as to cover the opening formed at the end opposite to the first casing portion 31 of the second casing portion 32. A flexible bellows cover 46 is provided. As will be described later, the push rod 28 is provided so as to be movable together with the first piston 36 via the protruding length adjusting means 30.

  The spring brake means 29 includes a second spring 42, a second pressure chamber 43, and a second piston 44 as main components. The second piston 44 includes a cylindrical portion 44a configured as a cylindrical body, flange-shaped portions 44b and 44c provided so as to protrude outward at both ends of the cylindrical portion 44a, and an inner side of the cylindrical portion 44a. The push rod 28 is disposed so as to penetrate the inside of the tubular portion 44a. The flange-shaped portion 44b is composed of a plurality of members and is disposed on the distal end side of the push rod 28, and the flange-shaped portion 44c is disposed on the first piston 36 side. The cylindrical member 44d is usually integrated with the cylindrical portion 44a and the flange-shaped portions 44b and 44c by a fixing ring 67 described later. Further, the second casing portion 32 is provided with a spring seat portion 32 a that protrudes inwardly along the inner periphery thereof and forms a pedestal of the second spring 42. The inner peripheral end of the spring seat portion 32a is in airtight sliding contact with the outer periphery of the cylindrical portion 44a of the second piston 44, and the second piston 44 is slidable in the axial direction with respect to the second casing portion 32. It is arranged.

  The second pressure chamber 43 is configured by a space partitioned by the outer periphery of the cylindrical portion 44 a and the flange-shaped portion 44 c of the second piston 44, the inner periphery of the second casing portion 32, and the spring seat portion 32 a. The second casing portion 32 is provided with a second pressure fluid passage 45 communicating with the second pressure chamber 43, and compressed air (pressure fluid) is supplied to the second pressure chamber 43 through the second pressure fluid passage 45. ) Is supplied. A second supply / exhaust port 45a that opens from the second pressure fluid passage 45 to the outside of the cylinder body 26 and that supplies / discharges compressed air is vertically below the swing pin 16a (see FIGS. 1 and 2). It is arranged to be located in.

  The second spring 42 is provided as a coil spring disposed around the cylindrical portion 44a of the second piston 44, and is disposed between the spring seat portion 32a and the flange-shaped portion 44b. Thus, the second spring 42 biases the flange-shaped portion 44b against the spring seat portion 32a (that is, the second piston 44 against the cylinder body 26) in the brake direction (the direction of arrow A in the figure). It is arranged like this. Therefore, in the spring brake means 29, the second spring 42 and the second pressure chamber 43 act in the opposite direction to the second piston, and the state where the compressed air is supplied to the second pressure chamber 43 is discharged. The second piston 44 moves in the braking direction by the biasing force of the second spring 42. As will be described later, the spring brake means 29 biases the push rod 28 via the service brake means 27 when the second piston 44 moves in the braking direction.

  The protrusion length adjusting means 30 includes an outer cylinder member 47, a shaft rod 48, a guide member 49, the above-described uneven surface 40, an O-ring (elastic member) 50, a recess 51, a partition wall (regulating means) 52, and the like. It is configured. The protrusion length adjusting means 30 is provided as a mechanism for adjusting the protrusion length of the push rod 28 from the cylinder body 26 in the moving direction of the first piston 36 when the brake is released when the brake is operated.

  The outer cylinder member 47 is formed in a cylindrical shape, and a base end portion thereof is fixed to the first piston 36 via the flange plate 53 and the bolt 54 and is configured to move together with the first piston 36. . A head flange 55 is housed inside the base end of the outer cylinder member 47. A tapered constricted portion 56 is formed on the inner peripheral surface of the shaft end of the outer cylinder member 47, and this constricted portion 56 causes the outer peripheral portion of the head flange 55 to move forward (the push rod 28 advances). To the side). Further, a push pin 57 protrudes inward from the outer cylinder member 47, and the tip of the push pin 57 can push the head flange 55 to the base end side (the retracting side of the push rod 28). It is like that.

  The outer cylinder member 47 is disposed between the guide member 49 disposed around the push rod 28 and the second piston 44, and the guide member 49 is disposed therein. The outer cylinder member 47 has a stop ring 58 attached to the outer periphery on the front end side, and the inner peripheral portion on the front end side of the cylindrical member 44d of the second piston 44 is connected to the outer cylinder member via the stop ring 58. 47 is locked. As a result, when the service brake means 27 is operated after the service brake means 27 is operated once, when the second piston 44 moves in the brake direction, the second piston 44 is connected via the retaining ring 58 to the outer cylinder member 47. The push rod 49 is urged via the outer cylinder member 47 and the first piston 36 of the service brake means 27.

  The shaft rod 48 has a male screw 59 threaded on the outer peripheral surface thereof, and is engaged with a female screw 39 threaded in the vicinity of the first pressure chamber 35 side end portion of the inner peripheral surface of the push rod 28. The push rod 28 is attached to the shaft rod 48 by being installed and screwed into the shaft hole of the push rod 28. Further, a base end portion of the shaft rod 48 located on the first pressure chamber 35 side is fixed to the head flange 55, and the shaft rod 48 is configured to move together with the first piston 36.

  The guide member 49 is formed in a cylindrical shape, and is rotatably supported via a thrust bearing (bearing) 60 on the outer side of the shaft rod 48. Further, a biasing spring 63 is interposed between the guide member 49 and the head flange 55. The guide member 49 has a stepped shaft hole through which the push rod 28 is inserted, and is a space for opening the uneven surface 40 side to a portion formed in a large diameter of the shaft hole, and an O-ring 50. An O-ring housing space 49a is formed in which is disposed. That is, the O-ring housing space 49a is formed between the bottom portion (stepped portion) 49b of the large-diameter hole in the guide member 49 and the retaining ring 61 fitted to the open end of the large-diameter hole. (The side facing the uneven surface 40 of the push rod 28) is opened.

  The O-ring 50 is disposed in an O-ring accommodation space 49 a between the push rod 28 and the guide member 49. In this O-ring housing space 49a, a plurality (four) of O-rings 50 are arranged side by side in the axial direction, and backup rings 62 are provided at both ends (between adjacent O-rings 50) of each O-ring 50. Is arranged. Further, the positions of the bottom 49b and the retaining ring 61 are O so that the O-ring 50 is elastically deformed slightly between the bottom 49b of the large-diameter hole of the guide member 49 and the retaining ring 61 in the axial direction. It is set in relation to the width of the ring 50. As a result, the O-ring 50 is deformed so as to expand toward the inner peripheral side, and the guide member 49 and the push rod 28 are connected by engaging with the irregular surface 40 on the outer peripheral surface of the push rod 28. As described above, the guide member 49 can be moved together with the push rod 28 and is attached to the push rod 28 so that a predetermined resistance force acts when the push rod 28 moves relatively in parallel with the moving direction of the first piston 36. Yes. When a predetermined force or more is applied to the guide member 49, the push ring 28 is displaced relative to the guide member 49 by the O-ring 59 getting over the convex portion of the uneven surface 40 by deformation. In this embodiment, an example in which an O-ring having a substantially circular cross section with a diameter of about 5 millimeters and having a relatively high dimensional accuracy is used as the elastic member has been described. An elastic member such as rubber having the following cross-sectional shape may be used as a main raw material.

  FIG. 7 shows the partition wall 52, the outer cylinder member 47, and the guide member 49 as viewed from the direction of the arrows BB in FIG. 6, and the outer cylinder member 47 and the guide member 49 are shown in cross section. Yes. As shown in FIGS. 6 and 7, the recess 51 is provided as a groove-like portion that is partially recessed in the peripheral wall of the guide member 49 and extends short in the circumferential direction and the axial direction. It is provided at two places.

  As shown in FIGS. 6 and 7, the partition wall 52 is disposed between the second piston 44 and the first spring 34, and the service brake means 27 is disposed in the cylinder body 26. It is provided so as to partition the region and the region where the spring brake means 29 is disposed. The partition wall 52 has an engagement portion 64 that engages with a recess 51 provided in the guide member 49, and the engagement portion 64 and the recess 51 engage in the axial direction of the guide member 49. Thus, the movable range (stroke) of the guide member 49 in the moving direction of the first piston 36 is restricted. Further, the engaging portion 64 and the recess 51 are engaged in the circumferential direction of the guide member 49, so that the movable range in the rotational direction in which the moving direction of the first piston 36 of the guide member 49 is the rotational axis direction is also regulated. (It is designed to prevent rotation). The engaging portions 64 are provided at a plurality of locations (two locations) of the partition wall 52 corresponding to the respective recesses 51. In the outer cylinder member 47, openings are provided at locations corresponding to the recesses 51, and the engaging portions 64 penetrate the openings and engage with the recesses 51.

  Further, the partition wall 52 has an opening 65 through which the guide member 49 penetrates at the center thereof, and the engaging portion 64 is provided at an edge portion of the opening 65. The opening 65 is formed so that the guide member 49 can be penetrated through the opening 65 without engaging the recess 51 and the engaging portion 64 when the brake cylinder device 2 is assembled. The guide member 49 is formed in such a size that there can be a gap around the entire circumference between the outer diameter of the cross section perpendicular to the axial direction of the guide member 49 and the edge portion of the opening 65. 7, in the brake cylinder device 2, the partition wall 52 is arranged such that the radial center position of the guide member 49 is eccentric with respect to the radial center position of the opening 65 of the partition wall 52. And the guide member 49 is arrange | positioned.

  Note that the spring brake means 29 is provided with a manual release mechanism 66 for manually releasing the brake operation state. The manual release mechanism 66 includes a fixing ring 67, a closing member 68, a fixing rod 69, a return spring 70, and an operation ring 71. FIG. 8 is a cross-sectional view showing the manual opening mechanism 66 and the components disposed inside the fixing ring 67. 8 corresponds to the cross section of FIG. 6, and in FIG. 8, each component of the fixed rod 69, the return spring 70 and the operation ring 71 is compared with other components. The size is exaggerated.

  As shown in FIG. 7 and FIG. 8, the fixing ring 67 is formed as a C-shaped ring with slits, and a head portion 67a having a wedge-shaped outer surface at both ends opposed to each other through the slit portion. 67a is provided. The fixing ring 67 is disposed so as to be interposed in the flange-shaped portion 44 b of the second piston 44. The fixing ring 67 is reduced in diameter by being urged by the closing member 68 and the fixing rod 69 as will be described later, and is fitted into an annular groove 72 formed on the outer periphery of the cylindrical member 44d. Engage with the groove 72. In this way, the fixing ring 67 engages with the annular groove 72, so that the cylindrical member 44 d of the second piston 44 is fixed and integrated with other members of the second piston 44.

  The closing member 68 has an open U-shaped cross section, and is configured as a member in which two inclined surfaces that abut against the wedge-shaped outer surfaces of the head portions 67a and 67a of the fixing ring 67 are formed. Has been. The closing member 68 is arranged so as to be movable in the radial direction with respect to the fixing ring 67 by being guided along a predetermined groove in the second piston 44. Further, the fixed rod 69 is configured as a stepped shaft-like member having a wedge-shaped tapered surface 69 a formed on the distal end side, and is disposed in the second piston 44 so as to be movable back and forth. The return spring 70 is provided as a coil spring disposed around the small diameter portion of the stepped fixed rod 69, and is disposed between the stepped portion of the fixed rod 69 and the spring seat 73. By arranging the return spring 70 in this way, the fixed rod 69 is urged by the return spring 70, and the fixed rod 69 is moved so that the tapered surface 69a on the distal end side of the fixed rod 69 gets over the outside of the closing member 68. 69 presses the closing member 68 toward the radial center of the fixing ring 67. By pressing the closing member 68 in this way, the fixing ring 67 is held in a reduced diameter state so that the cylindrical member 44d is integrated with the second piston 44 in the second piston 44. It has become.

  The operation ring 71 is attached to the end of the fixed rod 69 opposite to the tapered surface 69a. By performing an operation of pulling the operation ring 71 in a direction away from the spring seat 73 against the urging force of the return spring 70, the closing member 68 by the fixed rod 69 that has been pressed in a state of riding on the closing member 68. The pressing state of is gradually released. With this release operation, the closing member 68 can move toward the radially outer side of the fixing ring 67 while slidingly contacting the tapered surface 69 a of the fixing rod 69. Accordingly, the diameter of the fixing ring 67 is increased, and the closing member 68 is urged toward the radially outer side of the fixing ring 67 by the wedge-shaped outer surfaces of the head portions 67a and 67a of the fixing ring 67. The engaged state between the ring 67 and the annular groove 72 is released. When the engagement between the fixing ring 67 and the annular groove 72 is released, the connection state between the cylindrical member 44d and the other members in the second piston 44 is disconnected (the integrated state is released), and the second piston 44 is released. A portion of the piston 44 excluding the cylindrical member 44d can move independently of the cylindrical member 44d. For this reason, by performing the pulling operation of the operation ring 71 in a state in which the spring brake means 29 is activated, the urging force by the second spring 42 can be prevented from acting on the push rod 28 via the second piston 44. . In other words, when the operation ring 71 is pulled, even if the second spring 42 urges the second piston 44 in the braking direction, the cylindrical member 44d and the outer cylinder member 47 that are locked to the stop ring 58. The push rod 28 together with the shaft rod 48 and the first piston 36 can be moved in the brake release direction, and the brake state can be released manually.

  Further, the brake cylinder device 2 is provided with a through cylinder 75 that communicates the inside and the outside of the cylinder body 26. FIG. 9 shows only a half cross section with respect to the axial center in the cross section of the brake cylinder device 2. In FIG. 9, different cross sections are shown with a broken line D as a boundary, a region indicated by an arrow D1 corresponds to the cross section of FIG. 6, and a region indicated by an arrow D2 corresponds to a cross section different from FIG. Yes. FIG. 10 is an enlarged cross-sectional view showing the through cylinder 75 and the vicinity thereof.

  The through cylinder 75 is formed as a rubber cylinder which is a cylindrical elastic body having an elbow portion. As shown in FIG. 9 and FIG. A spring chamber 74 (a region surrounded by the inner peripheral wall of the second casing portion 32, the spring seat portion 32a, and the flange-like portion 44b and the cylindrical portion 44a of the second piston 44) in which the two springs 42 are disposed. Communicating with As shown well in FIG. 10, the through cylinder 75 is provided with a screw portion 75 a formed as a male screw on the outer periphery of one end portion, and this screw portion 75 a is formed in the second casing portion 32. The female thread portion 77 is screwed. That is, the through cylinder 75 is screwed to the cylinder body 26 with a screw portion 75a so as to communicate with the inside of the cylinder body 26.

  A filter 78 shown in FIGS. 9 and 10 is attached to the inside of the through cylinder 75. FIG. 11 is a front view (FIG. 11 (a)) and a side view (FIG. 11 (b)) showing only the filter 78. FIG. As shown in FIG. 11, the filter 78 includes a circular wire mesh portion 78a and a frame portion 78b attached around the wire mesh portion 78a. These wire mesh part 78a and frame part 78b are both formed as steel rigid bodies. As shown in FIGS. 9 and 10, the filter 78 is disposed inside the through-cylinder 75 and at a position corresponding to a portion where the threaded portion 75 a is formed in the through-cylinder 75 a.

  Next, the operation of the brake cylinder device 2 will be described. FIG. 6 shows a brake non-operating state, and shows a state where neither the service brake means 27 nor the spring brake means 29 are operating. In the brake inoperative state shown in FIG. 6, the compressed air is supplied from the second supply / exhaust port 45a to the second pressure chamber 43 so that the spring brake means 29 is in the inoperative state, and the second spring 42 is attached. The second piston 44 is maintained in a state of being biased against the force in an anti-braking direction (a direction in which the brake is released in a direction opposite to the braking direction) that is opposite to the arrow A direction in the drawing.

  When a predetermined valve (not shown) is controlled from the brake inoperative state shown in FIG. 6 and compressed air is supplied to the first supply / exhaust port 37a, the first piston 36 resists the first spring 34 and brakes. The outer cylinder member 47 which is pushed in the direction (arrow A direction in FIG. 6) and is fixed to the first piston 36 also moves in the braking direction. Then, the constricted portion 56 formed on the inner peripheral surface of the base end portion of the outer cylinder member 47 presses the outer edge of the head flange 55, so that the head flange 55 also moves in the brake direction, and the shaft rod 48 is moved. The push rod 28 connected to the head also moves in the arrow A direction. At this time, the head flange 55 and the shaft rod 48 do not rotate but are simply pushed by the outer cylinder member 47. In this way, the service brake means 27 is operated and the push rod 28 is pushed in the braking direction (with the outer cylinder member 47 and the guide member 49), and the brake caliper device 1 is operated.

  As described above, when the braking force by the service brake means 27 is exerted and the vehicle is shifted from the stopped state to the parking state as it is, a predetermined valve (not shown) is used when the service brake 27 is operated. And the compressed air sealed in the second pressure chamber 43 is discharged from the second supply / discharge port 45a. As a result, the action of the second pressure chamber 43 resisting the urging force of the second spring 42 is released, the second piston 44 is extended by the urging force of the second spring 42, and the cylindrical member of the second piston 44. When 44 d comes into contact with the retaining ring 58, the second piston 44 is engaged with the outer cylinder member 47. In this state, even if the service brake means 27 is released, that is, even if the compressed air supplied to the first pressure chamber 35 is discharged and the first piston 36 is moved in the anti-brake direction by the first spring 34, The push rod 28 is urged by the spring brake means 29 and the braking force is maintained. When manually releasing the operation of the spring brake means 29, as described above, the operation ring 71 of the manual release mechanism 66 is operated to release the fixation of the cylindrical member 44d in the second piston 44. Become.

  In a state where only the service brake means 27 is operated and the braking force is exerted while the spring brake means 29 is maintained in the non-actuated state, a predetermined valve (not shown) is controlled to control the first supply / exhaust port 37a. When the compressed air supplied to the first pressure chamber 35 is discharged, the first piston 34 is pushed in the anti-braking direction by the first spring 34, and the outer cylinder member 47 is also pulled in the anti-braking direction. . As a result, the head flange 55 is pushed by the push pin 57, and the shaft rod 48 and the push rod 28 connected to the shaft rod 48 are also pulled in the anti-braking direction and retracted. Thus, the brake inactive state shown in FIG. 6 is restored.

  On the other hand, when the braking surface of the brake pad 14 is worn, the stroke of the push rod 28 required to exert the braking force increases, and the stroke of the guide member 49 coupled to the push rod 28 via the O-ring 50 also increases. . If this stroke exceeds the stroke regulated by the recess 51 provided in the guide member 49 and the engagement portion 64 of the partition wall 52, the engagement portion 64 engages with the recess 51. Large return force. For this reason, after the engaging portion 64 and the concave portion 51 are engaged, the O-ring 50 is deformed and gets over the convex portion of the concave and convex surface 40, so that the push rod 28 is equivalent to the stroke of the push rod 28 beyond that. The guide member 49 is displaced (displaced) in the advancing direction. That is, when the first piston 36 moves in the protruding direction (brake direction), the engaging portion 64 and the recess 51 are engaged, and when the first piston 36 moves in the protruding direction, only the guide member 49 is moved. The shaft rod 48, the push rod 28, etc. are displaced in the projecting direction. Normally, the amount of wear of the brake pad for each brake operation is extremely small, so that the amount of displacement of the push rod 28 per stroke is also as small as the interval between the convex portions of the concavo-convex surface 40.

  Further, when the compressed air is discharged from the first supply / discharge port 37 a after the relative displacement between the push rod 28 and the guide member 49 occurs and the brake by the service brake means 27 is released, the first piston 36 is counteracted by the first spring 34. The head flange 55 is pushed in the anti-braking direction by the push pin 57 attached to the outer cylinder member 47 which is returned to the brake direction and pulled by this. Then, the head flange 55 rotates together with the shaft rod 48 rotatably supported by the thrust bearing 60 so that the shaft rod 48 is pulled out from the push rod 28, and the displacement of the push rod 28 in the advancing direction with respect to the guide member 49 is moved by screw movement. Absorb. As a result, the push rod 28 protrudes in the advance direction by the amount of the deviation. Thus, the protruding length of the push rod 28 is adjusted, and the brake cylinder device 2 can be operated with the normal stroke of the push rod 28 from the next time.

  As described above, according to the brake cylinder device 2 according to the present embodiment, the push rod 28 that moves together with the first piston 36 of the service brake means 27 penetrates the second piston 44 of the spring brake means 29 and protrudes. A predetermined resistance force acts between the adjusting member 30 and the guide member 49. For this reason, in the brake cylinder device 2 provided with the service brake means 27, the spring brake means 29, and the protrusion length adjusting means 30, it can be made compact by preventing the mechanism from becoming complicated and enlarged. The protrusion length adjusting means 30 includes an engaging portion 64 that is disposed between the second piston 44 and the first spring 34 and engages with the recess 51 provided in the guide member 49. A restricting means 52 having a simple configuration for restricting 49 movable ranges is provided. For this reason, the range in which the protruding length of the push rod 28 is adjusted and the range in which the push rod 28 is not adjusted can be regulated by a simple mechanism.

  Therefore, according to the brake cylinder device 2, the service brake means 27, the spring brake means 29, and the protruding length adjusting means 30 of the push rod 28 are provided, and the complexity and enlargement of the mechanism can be suppressed. It is possible to provide the brake cylinder device 2 that can also realize a means for regulating the range in which the adjustment is performed and the range in which the adjustment is not performed with a simple mechanism.

  According to the brake cylinder device 2, the guide member 49 can also be prevented from rotating by the recess 51 and the restricting means 52 having the engaging portion 64 that engages with the recess 51. Therefore, the function of restricting the movable range of the guide member 49 in the moving direction of the first piston 36 and the function of preventing rotation can be realized by one restricting means 52, and a simple mechanism can be achieved.

  In addition, according to the brake cylinder device 2, by providing a plurality of pairs of the corresponding concave portions 51 and the engaging portions 64, it is possible to disperse and bear the load acting on the engaging portions. The wear generated at the joint portion 64 can be reduced and the durability can be improved.

  Further, according to the brake cylinder device 2, the restricting means 52 is provided as a partition wall 52 that divides the area of the service brake means 27 and the area of the spring brake means 29, so that the restricting means 52 can be formed thin in a flat plate shape. And it can be set as a simple structure. For this reason, the restricting means 52 having a simple configuration can be disposed in the brake cylinder device 2 with high space efficiency. When the brake cylinder device 2 is assembled, the guide member 49 can be passed through the opening 65 of the partition wall 52 through a predetermined gap without engaging the concave portion 51 and the engaging portion 64. The assembly work can be easily performed, and the efficiency of the assembly work can be improved.

  Further, according to the brake cylinder device 2, the guide member 49 is inserted into the opening 65 of the partition wall 52 through a predetermined gap without engaging the recess 51 and the engaging portion 64 when the brake cylinder device 2 is assembled. By allowing the center of the guide member 49 to be eccentric with respect to the center of the opening 65, a penetrable configuration can be easily realized with a simple configuration.

  Further, according to the brake cylinder device 2, in the protrusion length adjusting means 30, the elastic member 50 is deformed and engaged (bite in), so that the frictional force or coupling between the push rod 28 and the guide member 49 is achieved. The power can be stabilized. Thereby, it becomes possible to easily adjust and manage the sliding resistance in the protrusion length adjusting means 30 with a simple configuration.

  Further, according to the brake cylinder device 2, the push rod 28 is attached by being screwed to the shaft rod 48 that moves together with the first piston 36, and therefore, the shaft rod 48 corresponds to the projection length of the push rod 28 with respect to the push rod 28. The structure which absorbs by moving a screw is attained. For this reason, even when the protruding length of the push rod 28 is adjusted, it is possible to prevent the displacement of the first piston 36 with respect to the cylinder body 26 and to realize a configuration that keeps the volume of the first pressure chamber 35 substantially constant. Can do.

  Further, according to the brake cylinder device 2, the second piston 44 is disposed between the guide member 49 and the second piston 44 and engages with the outer cylinder member 47 that moves together with the first piston 36, thereby holding the push rod 28. Can be energized. Therefore, by arranging the outer cylinder member 47 that can be configured in a simple shape, a configuration that urges the push rod 28 through the service brake means when the second piston 44 moves in the braking direction is realized with a simple mechanism. can do.

  Further, according to the brake caliper device 1 according to the present embodiment, the brake caliper device 1 has the service brake means 27, the spring brake means 29, and the adjustment means 30 of the protruding length of the push rod 28, and can suppress the complexity and enlargement of the mechanism. The brake caliper device 1 including the brake cylinder device 2 that can also realize the means 52 for regulating the range in which the protruding length of the push rod 28 is adjusted and the range in which the push rod 28 is not adjusted can be realized with a simple mechanism.

  Further, according to the brake caliper device 1, the first supply / exhaust port 37a and the second supply / exhaust port 45a are positioned vertically below the swing pin 16a, and therefore the first pressure chamber is provided via the first supply / exhaust port 37a. 35 when the pressure fluid is supplied to 35 and when the pressure fluid is supplied to the second pressure chamber 43 via the second supply / discharge port 45a, the moment in the swinging direction is applied to the caliper body 11 and the brake cylinder device 2. Can be prevented from occurring. For this reason, it is possible to suppress the uneven contact of the brake pad 14 with the brake disk 15 during the emergency of the pressure fluid, and to suppress the uneven wear of the brake pad 14.

  Further, according to the brake caliper device 1, the filter 78 can be attached together with the through-cylinder 75 simply by screwing the through-cylinder 76 provided with the filter 78 into the cylinder body 26 with the threaded portion 75 a at the end thereof. . And since the filter 78 is arrange | positioned inside the through-cylinder 75, the member for exclusive use for attaching the filter 78 etc. becomes unnecessary. Therefore, the cylinder 75 can be easily and quickly attached to the cylinder body 26 together with the filter 78, and the filter attaching operation can be simplified.

  Further, according to the brake caliper device 1, when the brake caliper device 1 is removed and placed on the floor or the like for maintenance work of the brake caliper device 1, the dimensions of the legs 18 are set appropriately. The brake caliper device 1 can be placed in a horizontal state by the lower end portion on one end side of the caliper body 11 and the leg portion 18. For this reason, maintenance work etc. can be performed easily and work efficiency can be improved.

  In addition, according to the brake caliper device 1, it is possible to realize a structure in which the brake pad 14 can be easily attached and detached by the latch 19 that is urged by the leaf spring 22 in a direction different from the attaching / detaching direction of the brake pad 14. Then, it is possible to prevent the latch 19 from being released simply by inserting the snap pin 20 below the back plate 12. That is, in the replacement work of the brake pad 14, the snap pin 20 is pulled out to release the latch 19 from being released and the latch 19 is resisted against the leaf spring 22 in preparation for the brake pad 14 to fall. By rotating, the brake pad 14 can be reliably removed. When the new brake pad 14 is attached, the latch 19 is engaged by the leaf spring 22 when the key portion 14a of the brake pad 14 is slid into the key groove 12b of the back plate 12 and reaches a predetermined position. It will be stopped, and attachment can also be performed simply. Further, since the latch 19 and the snap pin 20 are connected by the connecting chain 21, a configuration for preventing the snap pin 20 from being detached and preventing loss can be easily realized. Therefore, an easy brake pad replacement work that can freely release the support of only the brake pad 14 without causing an inadvertent drop of the brake pad 14 is realized. Thus, it is possible to provide the brake caliper device 1 that does not require troublesome and skillful work such as preventing loosening of bolts.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, the present invention can be modified as follows.

  In the present embodiment, the brake cylinder device 2 serving as the drive source of the brake caliper device 1 has been described by way of example using an air cylinder device that is driven by air pressure, but is not limited thereto, and is driven by hydraulic pressure. A cylinder device or the like may be used.

  Further, not only when the concave and convex surface 40 is formed on the outer peripheral surface of the push rod 28, but a predetermined resistance force is applied by the frictional force that the push rod 28 receives from an elastic member such as the O-ring 50 with the outer peripheral surface being flat. It may be configured. In this case, the processing of the outer peripheral surface of the push rod 28 is easy, and the processing cost can be reduced. The surface of the push rod 28 is not limited to the case where the uneven surface 40 is formed by repeatedly arranging the unevenness in the moving direction of the push rod 28, and the surface can be subjected to surface treatment such as blasting to adjust the frictional force. .

  Further, not only when the push rod 28 and the guide member 49 are connected via an elastic member, a predetermined resistance force acts when the push rod moves in parallel with the movement direction of the first piston with respect to the guide member. Thus, for example, the push rod and the guide member may be coupled by a mechanical configuration such as a configuration in which the push rod moves relative to the guide member while driving a gear mechanism having a predetermined rotational resistance.

  Further, the brake cylinder device 2 of the present embodiment has been described by taking the case of being used in the disc brake type brake caliper device 1 as an example, but the present invention is not limited to this example and can be applied. That is, the brake cylinder device 2 is not limited to use in a disc brake type brake mechanism, and a brake pad is attached to the tip end side of the push rod, and the brake pad is brought into contact with the tread surface of the wheel to generate a braking force. It can also be used for a tread brake type brake mechanism.

  In the present embodiment, the protrusion length adjusting means 30 is an example in which the protrusion length adjusting means 30 is constituted by a recess 51 provided in the guide member 49 and a restricting means 52 having an engaging portion 64 that engages with the recess 51. Although explained, a convex part may be used instead of the concave part 51. That is, it may be a protrusion length adjusting means configured to include a convex portion provided on the guide member 49 and a restricting means having an engaging portion that engages with the convex portion.

It is the schematic which looked at the brake caliper device for rail vehicles which concerns on embodiment of this invention from the axle direction. It is the schematic which looked at the brake caliper device shown in FIG. 1 from the brake cylinder device side in parallel with the advancing direction of the vehicle. It is the schematic which looked at the brake caliper device shown in FIG. 1 from the lower side. It is a perspective view of the brake pad in the brake caliper device shown in FIG. FIG. 5 is a plan view of the brake pad shown in FIG. 4 and a cross-sectional view taken along the line AA. It is sectional drawing of the brake cylinder apparatus in the brake caliper apparatus shown in FIG. It is a figure including the partial cross section which showed the partition wall, outer cylinder member, and guide member of the brake caliper apparatus shown in FIG. It is a figure which shows the manual release mechanism in the brake caliper apparatus shown in FIG. FIG. 7 is a cross-sectional view showing a plurality of different cross sections only in a half cross section with respect to the axial center in the cross section of the brake cylinder device shown in FIG. 6. FIG. 10 is an enlarged cross-sectional view showing a through cylinder and its vicinity in the brake cylinder device shown in FIG. 9. It is the front view and side view which show the filter arrange | positioned in the through-cylinder shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brake caliper apparatus 2 Brake cylinder apparatus 26 Cylinder main body 27 Service brake means 28 Push rod 29 Spring brake means 30 Projection length adjustment means 34 1st spring 35 1st pressure chamber 36 1st piston 42 2nd spring 43 2nd pressure chamber 44 Second piston 49 Guide member 51 Recess 52 Partition wall (Regulator)
64 engaging part

Claims (9)

A brake cylinder device used in a brake mechanism for a vehicle,
The first spring and the first pressure chamber have a first piston acting in the opposite direction, and the first fluid is supplied to the first pressure chamber to resist the biasing force of the first spring. Service brake means in which the piston moves relative to the cylinder body and moves in the brake direction;
A push rod movable with the first piston;
A guide member that is movable together with the push rod and is attached to the push rod so that a predetermined resistance acts when the push rod moves relative to the movement direction of the first piston; A protrusion length adjusting means for adjusting a protrusion length of the push rod from the cylinder body in the movement direction of the first piston at the time of braking operation;
The second spring and the second pressure chamber act in opposite directions and have a second piston through which the push rod passes, and the state is changed from the state in which the pressure fluid is supplied to the second pressure chamber to the state in which the second fluid is discharged. Spring brake means for urging the push rod via the service brake means while the second piston is moved in the brake direction by the urging force of the second spring.
With
The protrusion length adjusting means has a recess or a protrusion provided in the guide member, and an engagement portion that engages with the recess or the protrusion, and is arranged between the second piston and the first spring. The brake cylinder device further comprising: a restricting means that restricts a movable range of the guide member in the moving direction of the first piston. The brake cylinder device according to claim 1,
The restricting means restricts the movable range of the guide member in the rotation direction around the axis of the first piston by engaging the engaging portion with the concave portion or the convex portion. apparatus. The brake cylinder device according to claim 1 or 2,
The brake cylinder, wherein the concave portion or the convex portion is provided at a plurality of locations in the guide member, and the engaging portion is provided at a plurality of locations in the regulating means corresponding to each of the concave or convex portions. apparatus. The brake cylinder device according to any one of claims 1 to 3,
The restricting means is provided as a partition wall that divides an area in which the service brake means is disposed and an area in which the spring brake means is disposed in the cylinder body,
In the central portion of the partition wall, an opening through which the guide member passes is formed,
The engaging portion is provided at an edge portion forming the opening,
The opening portion has an outer diameter of the guide member so that the guide member can penetrate the opening portion without engaging the concave portion or the convex portion and the engaging portion when the brake cylinder device is assembled. A brake cylinder device characterized in that it is formed in such a size that a gap over the entire circumference can exist with an edge portion of the opening. The brake cylinder device according to claim 4, wherein
The brake cylinder device, wherein the partition wall and the guide member are arranged so that a radial center position of the guide member is eccentrically positioned with respect to a radial center position of the opening. The brake cylinder device according to any one of claims 1 to 5,
The protrusion length adjusting means further includes an uneven surface formed by repeatedly arranging unevenness on the outer surface of the push rod in the moving direction of the push rod, and an elastic member disposed between the push rod and the guide member. ,
In the guide member, a space for opening at least the uneven surface side is formed, and the elastic member is disposed in this space,
The elastic member is deformed and engaged with the concavo-convex surface to connect the guide member and the push rod,
The brake cylinder device according to claim 1, wherein when a force greater than a predetermined force is applied to the guide member, the push rod is displaced with respect to the guide member by the elastic member getting over the convex portion of the uneven surface by deformation. The brake cylinder device according to any one of claims 1 to 6,
The protrusion length adjusting means further includes a shaft bar that moves together with the first piston and to which the push bar is attached.
The push rod is formed in a cylindrical shape having a shaft hole extending in parallel with the moving direction of the first piston, and a female screw is threaded on at least a part of the inner surface of the shaft hole,
The brake cylinder according to claim 1, wherein a male screw that engages with the female screw is threaded into at least a part of an outer surface of the shaft rod, and the shaft rod is screwed into the shaft hole. The brake cylinder device according to any one of claims 1 to 7,
The protrusion length adjusting means is disposed between the guide member disposed around the push rod and the second piston, and the guide member is disposed inside and moves together with the first piston. An outer cylinder member,
The spring brake means is configured such that when the second piston moves in the braking direction, the second piston is engaged with the outer cylinder member so that the outer cylinder member and the first piston of the service brake means are moved. A brake cylinder device characterized in that the push rod is urged through the brake cylinder device.   A brake cylinder device according to any one of claims 1 to 8, and a caliper body equipped with the brake cylinder device and attached so as to be relatively movable in an axle direction with respect to a vehicle carriage. The brake caliper device is characterized in that the brake cylinder device is operated to generate a braking force by sandwiching the disc on the axle side by a pair of restrictors attached to the caliper body.

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