JP2015157582A - Buffer for railway vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buffer for a railway vehicle, which buffers both small and great impact forces, and which is compact and lightweight despite possession of a shank guide function and a centering function.SOLUTION: A buffer for a railway vehicle includes a rubber buffer part (G) that comprises first and second rubber buffers (1 and 2), and a viscous fluid buffer part (F) that comprises a cylinder (30) and a piston body (35). The first and second buffers (1 and 2) are attached to both sides of a vehicle body attachment plate (20) in an initial pressure-applied state, respectively. The first and second buffers (1 and 2) are compressed in an axial direction, and an action rod (10) for compressing a predetermined part is rigidly connected to the cylinder (30). A coupler is connected to the piston body (35).

Description

  The present invention relates to a shock absorber that is combined with a railway vehicle coupler to form a coupling device, and is not particularly limited, but is suitable for a railway vehicle, a monorail, a trackless train, or the like. The present invention relates to a railway vehicle shock absorber.

  In general, a railway vehicle is operated with a plurality of vehicles connected by a connector, but an impact occurs between the vehicles when connected. In addition, when a plurality of vehicles are knitted and run, the knitted vehicles can be regarded as a kind of elastic body connected by a coupler with some play, not a single rigid body. In addition, an impact occurs between vehicles when starting and stopping, acceleration and deceleration, and the like. Such an impact not only adversely affects the vehicle but also makes the ride uncomfortable. Therefore, a buffer is combined with the coupler in order to absorb such an impact.

  Hereinafter, the shock absorber combined with the coupler of the railway vehicle will be described. The shock absorber is designed to absorb both the pulling and pushing shocks acting from the coupler. In addition to the relatively simple single shock absorber, it can absorb even small shocks smoothly. It has been known. The coupling device combined with such a shock absorber is composed of a centering device, a case receiving device, a rubber shock absorber, a viscous fluid shock absorber, a plastic deformation shock absorber, or the like. A connecting device composed of these devices is well known in the art as well as patent literature, and Patent Document 1 can be cited as an example.

JP-A-11-20695

  As shown in the schematic side view of FIG. 3, the connecting device shown in Patent Document 1 has a connector 50 whose left end is connected to another connector 50 ′ in FIG. 3. The swinging mechanism 52 is connected to the coupler 50 at its left end, and the swinging mechanism 52 is similarly connected at its left end to a rubber shock absorber 55 that absorbs a normal impact during traveling. . A plastic deformation buffer 51 that is plastically deformed and buffered at the time of a large impact such as at the time of a collision is incorporated in the coupler 50. The swing mechanism 52 includes a horizontal pin 53 and a vertical pin 54. The rubber shock absorber 55 includes a shock absorber frame 56 and a pair of first and second rubber pad assemblies 61 and 62. These rubber pad assemblies 61 and 62 partition the shock absorber frame 56 in the axial direction. It arrange | positions between the partition member 58 and the 1st, 2nd accompanying plates 56 and 59, respectively. These companion plates 57 and 59 are locked to a companion plate guard attached to a vehicle (not shown). Each device or member described above is individually configured as shown in the drawing, and appropriately connected in the axial direction by a mechanical connecting member.

  When connecting the vehicles, it is desirable that the connector 50 and the rubber shock absorber 55 be held in a straight line, so that a centering device is provided, and a case receiving device is provided to prevent the connector 50 from hanging down due to gravity. This is not shown in FIG. The centering device, the case receiving device and the like are configured as disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-254542, and are specially incorporated into the above-described coupler device.

  When a small impact in the right direction in FIG. 3 acts on the connector 50, this impact force is transmitted to the shock absorber frame 56 via the plastic deformation shock absorber 51 and the swing mechanism 52. The partition member 58 that partitions the shock absorber frame 56 is also pushed rightward. Since the second companion plate 59 is fixed to the vehicle body by the companion plate guard, the second rubber pad assembly 62 is compressed. Thereby, the impact in the right direction is absorbed. When acting to the left, the partition member 58 now moves to the left, so that the first rubber pad assembly 61 provided between the partition member 58 and the first companion plate 57 is compressed and cushioned. Is done. When a large impact such as at the time of a collision is applied, the plastic deformation shock absorber 51 is deformed or broken, and the impact is buffered. The vertical pin 54 allows horizontal displacement between the coupler 50 and the rubber shock absorber 55, and vertical displacement is allowed by the horizontal pin 53.

  As described above, since the connecting device proposed in Patent Document 1 also includes the first and second rubber pad assemblies 61 and 62, small compression and buffering in the pulling direction during running can be absorbed. Moreover, since the plastic deformation buffer 51 is also provided, it can respond to a large impact such as a collision accident. Further, since the coupler 50 and the rubber shock absorber 55 are connected by the swing mechanism 52 including the horizontal pin 53 and the vertical pin 54, the vertical and horizontal directions between the coupler 50 and the rubber shock absorber 55 are also illustrated. Advantages such as being able to cope with displacement are obtained.

  However, problems to be improved are also found. For example, the coupler 50 (plastic deformation shock absorber 51), the swing mechanism 52, the rubber shock absorber 55, and the like are individually configured, so that mechanical parts for connecting them are required and the weight is relatively large. ing. Moreover, although not shown in FIG. 3, since the case receiving device and the centering device are also required, the weight is further increased. Since the weight is increased, the cost is increased. Further, since the coupler 50, the swing mechanism 52, the rubber shock absorber 55, and the like are arranged in the axial direction by the connecting parts, a long arrangement area or a large arrangement space is required in the axial direction.

  An object of the present invention is to provide a railcar shock absorber that solves the above-described problems. Specifically, it can buffer normal and relatively small impact forces such as the compression direction and tension direction, as well as relatively large impact forces such as in the event of a collision, and it also has a trunk receiving function and a centering function. Regardless, the object is to provide a compact and lightweight railcar shock absorber.

  In order to achieve the above object, the present invention provides a rubber shock absorber that absorbs a relatively small impact that occurs during traveling, and a viscous fluid that absorbs a relatively larger impact than the impact that occurs during a collision. It consists of a buffer part. The rubber shock absorber comprises a pair of first and second rubber shock absorbers disposed on both sides of the vehicle body mounting plate, and the viscous fluid shock absorber comprises a cylinder and a piston body filled with a viscous fluid. An action rod that acts to compress the first and second rubber shock absorbers is rigidly attached to the viscous fluid buffer portion. The action rod is attached to the vehicle body attachment plate via a sliding / swinging mechanism. That is, it is freely attached to the vehicle body attachment frame in the axial direction, the turning direction, or the swinging direction.

  That is, in order to achieve the above-mentioned object, the invention according to claim 1 has a rubber shock absorber that absorbs a relatively small impact that occurs during traveling, and a relatively large impact that is greater than the impact that occurs during a collision. A viscous fluid buffer portion that absorbs the rubber buffer portion from a pair of first and second rubber shock absorbers having a predetermined diameter, the viscous fluid buffer portion sliding on the cylinder filled with the viscous fluid, and the cylinder The pair of first and second rubber shock absorbers are arranged with an initial pressure applied to both sides of the vehicle body mounting plate, respectively, and the pair of first and second rubber shock absorbers are arranged. When a working rod that passes through the rubber shock absorber and the vehicle body mounting plate and freely moves in the axial direction, the rotation direction, or the swinging direction with respect to the vehicle body mounting plate moves in one direction, the pair of first and second rubbers One rubber shock absorber of the shock absorber The other rubber shock absorber is compressed and buffered when moving in the other direction, and when rotating or swinging in the predetermined direction, the predetermined portion of the pair of first and second rubber shock absorbers is compressed and buffered. The one end of the working rod is configured to be rigidly connected to the viscous fluid buffer portion. According to a second aspect of the present invention, in the shock absorber according to the first aspect, one end of the action rod is rigidly connected to a cylinder constituting the viscous fluid buffer portion.

  As described above, according to the present invention, the pair of first and second rubber shock absorbers constituting the rubber shock absorber are arranged with initial pressure applied to both sides of the vehicle body mounting plate, and the working rod is a viscous fluid. Since it is rigidly connected to the buffer part, the whole is compact and lightweight. Despite being compact and lightweight, it is equipped with a rubber shock absorber, so it absorbs a relatively small shock that occurs during travel and also has a relatively large shock that occurs during a collision by the viscous fluid buffer. Can absorb. Furthermore, since the working bar can be freely rotated or swung with respect to the vehicle body mounting plate, the working bar can be tilted in all directions such as up and down, left and right. Predetermined portions of the first and second rubber shock absorbers having a predetermined diameter are compressed. Thereby, the impact force of all directions is buffered.

  Further, when a downward force is applied to the viscous fluid buffer portion, in other words, to the action rod, a predetermined portion of the first and second rubber shock absorbers 1 and 2 having a predetermined diameter is compressed. Viscous fluid buffering is supported. That is, the body is received. According to the present invention, the first and second rubber shock absorbers are arranged on both side surfaces of the vehicle body mounting plate and are gravity-balanced to the left and right, and the viscous fluid buffer portion is configured to be compact and lightweight from the cylinder and the piston body. Therefore, the force for supporting the viscous fluid buffering portion is not large, and the effect that the cylinder is received without the conventional cylinder holder is obtained.

  Furthermore, according to the present invention, the left and right force acting on the viscous fluid buffer portion is also compressed by the predetermined portion of the first and second rubber shock absorbers, so that the restoring force of the first and second rubber shock absorbers The viscous fluid buffering portion also has an effect of being directed in the center direction perpendicular to the vehicle body mounting plate in a no-load state, that is, a centering effect.

  According to the second aspect of the present invention, since the one end of the action rod is rigidly connected to the cylinder constituting the viscous fluid buffering portion, it is connected to the piston body constituting the viscous fluid buffering portion. The weight of the viscous fluid buffer portion is closer to the vehicle body mounting plate than in the case where the vehicle body is attached. That is, the effect that the case is received with a smaller case receiving force is further obtained.

It is a front view which shows the buffer which concerns on embodiment of this invention in a partial cross section. It is a figure which shows other embodiment of this invention, The (a) is a front view which shows other embodiment of a viscous fluid buffer part in a partial cross section, The (a) is a sliding and rocking | fluctuation mechanism. The perspective view which shows the spherical body and action rod which concern on other embodiment, The (c) is a top view which shows the vehicle body mounting plate in which the sliding and rocking | fluctuation mechanism was integrated, (d) is a figure (c). Sectional view seen in the air direction in FIG. 2, (o) is a plan view showing a vehicle body mounting plate in which a sliding / swinging mechanism is incorporated by another method, and (f) is a carousel in FIG. It is sectional drawing seen to the direction. It is a side view which shows a prior art example.

  Embodiments of the present invention will be described below. As shown in FIG. 1, the shock absorber S according to the present embodiment schematically includes a rubber shock absorbing portion G that shocks a relatively small impact that occurs during normal running, and a larger size than that. For example, it includes a viscous fluid buffering portion F that absorbs a relatively large impact that may occur during a collision. The rubber shock absorber G includes first and second rubber shock absorbers 1 and 2, and the viscous fluid shock absorber F includes a cylinder 30 and a piston body 35.

  The pair of first and second rubber shock absorbers 1 and 2 disposed on both sides of the vehicle body mounting plate 20 can be constituted by a rubber hollow body, but preferably a plurality of disk-shaped steel plates having a predetermined diameter. And the plate-shaped rubber material of the same shape is comprised from the assembly laminated | stacked alternately. And the action | operation stick | rod 10 is penetrated by the center part.

  The viscous fluid buffer portion F includes a cylinder 30 filled with a viscous fluid and a piston body 35 that is reciprocally provided in the cylinder 30. The piston body 35 is longer in the axial direction than a normal piston. That is, the distance in contact with the inner peripheral wall of the cylinder 30 is long. In other words, the distance that the inner wall of the cylinder 30 supports the piston body 35 is also long. As a result, the piston body 35 is held horizontally in the cylinder 30. And according to the form of illustration, the action | operation stick | rod 10 is integrally extended from the bottom part 31 of this cylinder 30 to the axial direction, ie, the right direction in FIG. Therefore, when the cylinder 30 moves in the left-right direction in FIG. 1 or moves, the action rod 10 also moves integrally. Although not shown in the drawing, the left end of the piston body 35 is a connecting portion 36 to which a coupler is connected. An impact force mainly in the compression and tension directions is applied from the connecting portion 36 to the first and second rubber shock absorbers 1 and 2. The head chamber 32 of the cylinder 30 is filled with a viscous fluid such as dimethylsiliconoyl, phenylmethylsilicone oil, or fluorocarbon. Note that, when the viscous fluid is compressed, the “throttle” or “orifice” through which the viscous fluid flows is not shown in FIG.

  A male screw 12 to which the tightening nut 11 is screwed is formed on the outer peripheral surface in the vicinity of the right end of the action rod 10 extending in the axial direction from the bottom 31 of the cylinder 30. As will be described in detail later, the first rubber shock absorber 1, the vehicle body mounting plate 20, the second rubber shock absorber 2, and the second push plate 33 are positioned between the tightening nut 11 and the bottom portion 31 of the cylinder 30. To do.

  The vehicle body mounting plate 20 is a member for mounting the shock absorber S to the vehicle body, has a flat plate shape, and both side surfaces also serve as receiving plates for receiving the first and second rubber shock absorbers 1 and 2, respectively. A spherical sliding bearing, that is, a sliding / swinging mechanism 25 is provided on the vehicle body mounting plate 20, and the working bar 10 can be freely moved in an axial direction and a swinging direction through the vehicle body mounting plate 20. The sliding / swinging mechanism 25 is received by the concave bearings 26 and 26 having a split structure inserted into the through holes 21 formed in the vehicle body mounting plate 20, and these concave bearings 26 and 26. And a spherical body 27. The concave bearings 26 and 26 having a split structure have a size in which the outer peripheral surface is press-fitted or fitted into the inner peripheral surface of the through-hole 21 when the spherical body 27 is sandwiched and combined, and the radius center side has a predetermined amount. It has a semi-concave shape that is cut off. The axial length of the concave bearings 26, 26 is shorter than the plate thickness of the vehicle body mounting plate 20, and there are predetermined gaps s, s or “play” on both sides thereof. Since there are gaps s, s, the action rod 10 can rotate or swing a predetermined amount around the point P without contacting the through hole 21. In this way, the spherical body 27 is rotatably supported by the concave bearings 26 and 26. A through hole is formed in the spherical body 20, and the action rod 10 is slidably inserted into the through hole. Accordingly, the action rod 10 is axially supported by the spherical body 20 and is movable, and the spherical body 20 is rotatably supported by the concave bearings 26 and 26 so as to be pivotable and swingable in all directions around the point P. It can rotate freely. A plurality of bolt insertion holes 22, 22,... For mounting the vehicle body are formed at predetermined locations on the vehicle body mounting plate 20.

  Next, the operation will be described. A spherical body 27 is sandwiched or enclosed between the concave bearings 26 and 26 having a split structure. Then, the concave bearings 26 and 26 enclosing the spherical body 27 are press-fitted into a predetermined position of the through hole 21 of the vehicle body mounting plate 20. The first rubber shock absorber 1 is inserted into the action rod 10 extending from the bottom 31 of the cylinder 30. Then, the action rod 10 is inserted into the vehicle body mounting plate 20 from the left side in FIG. That is, the action rod 10 is inserted into the spherical body 27. Next, the second rubber shock absorber 2 and the second push plate 33 are inserted in this order and tightened with the tightening nut 11. When tightening, a predetermined initial pressure is applied to the first and second rubber shock absorbers 1 and 2. Thereby, the shock absorber S is configured. The vehicle body mounting plate 20 is attached to the vehicle body with a plurality of bolts, and a coupler is connected to the coupling portion 36 of the piston body 35.

  Now, when a relatively small force in the pushing direction as generated during traveling is applied in the direction indicated by the arrow A from the coupler side, the viscous fluid buffer portion F can be regarded as a kind of rigid body against a small impact, Further, since the vehicle body mounting plate 20 is fixed, the action rod 10 is pushed rightward in FIG. The first rubber shock absorber 1 is compressed between the bottom 31 of the cylinder 30 that also functions as the first push plate and the vehicle body mounting plate 20, thereby buffering a relatively small impact force. Conversely, when an impact force acts in the pulling direction, the second rubber shock absorber 2 is now compressed between the second push plate 33 and the vehicle body mounting plate 20, thereby buffering the shocking tensile force. The When a large impact such as that generated during a collision is applied to the piston body 35, the piston body 35 of the viscous fluid buffering section F compresses and buffers the viscous fluid.

  When a force other than the axial direction is applied from the coupler, for example, a force from above to below, the action bar 10 can swing up and down around the point P, so that the action bar 10 tilts and the vehicle body mounting plate 20 and the cylinder The distance between the vehicle body mounting plate 20 and the second pressing plate 33 is narrower between the upper part and the lower part. That is, the lower part of the first rubber shock absorber 1 is compressed and the upper part of the second rubber shock absorber 2 is compressed. Since the first and second rubber shock absorbers 1 and 2 have a predetermined diameter, the downward impact force is sufficiently buffered. When acting from below to above, the opposite sides of the first and second rubber shock absorbers 1 and 2 are compressed and similarly buffered. Since the action bar 10 can be rotated or swung in any direction around the point P, it is similarly buffered against the impact force in the horizontal direction.

  In the shock absorber according to the present embodiment, as described above, when a downward force is applied to the piston body 35, that is, the viscous fluid buffer portion F, the predetermined portions of the first and second rubber shock absorbers 1 and 2 are compressed. However, the viscous fluid buffer portion F is supported by the reaction of the compressive force. That is, the body is received. In particular, according to the present embodiment, the first and second rubber shock absorbers 1 and 2 are gravity-balanced with respect to the vehicle body mounting plate 20, and the viscous fluid buffer portion F is compact and lightweight. The torso receiving force, that is, the force for supporting the viscous fluid buffering portion F is not large, and the torso is received without a conventional torso receiving device. In addition, according to the present embodiment, as described above, the left and right force acting on the piston body 35 or the viscous fluid buffering portion F is also compressed by the predetermined portion of the first and second rubber shock absorbers 1 and 2 to be buffered. The coupler connected to the viscous fluid buffer portion F by the restoring force of the first and second rubber shock absorbers 1 and 2 faces the center direction perpendicular to the vehicle body mounting plate 20 in the no-load state. That is, it is centered. As described above, according to the present embodiment, the first and second rubber shock absorbers 1 and 2 having a predetermined diameter are provided with a predetermined pressure applied to both sides of the vehicle body mounting plate. Centering action is also obtained.

  The present invention is not limited to the above embodiment and can be implemented in various forms. For example, in the embodiment shown in FIG. 1, the viscous fluid buffering portion F is a single type, but it is also possible to fill the both chambers on the head side and the rod side of the piston with a viscous fluid to make a double type. When implemented in this way, the piston head is shortened in the axial direction, so that the piston rod can be received by the cylinder lid. Further, since the cylinder 30 and the piston body 35 constituting the viscous fluid buffering portion F are relative, the action rod 10 can be extended from the piston body 35. An example of this is shown in FIG. When implemented in this way, the first push plate 31 ′ is attached to the piston body 35, and the action rod 10 extends from the push plate 31. Further, a connecting portion 36 ′ is provided on the cylinder 30 side.

  The tightening nut 11 screwed into the male screw 12 of the action rod 10 also has an effect of balancing the weight of the viscous fluid buffer portion F. Therefore, the weight of the tightening nut 11 is made larger than the design value and the balance weight is adjusted. It can also have an effect. Furthermore, a nut for balance weight can be provided separately. The balance weight nut also functions as a double nut for preventing loosening.

  Another embodiment of the sliding / swinging mechanism 25 is shown in FIGS. The same reference numerals are given to the same elements as those of the embodiment shown in FIG. 1, and the same reference numerals are given the same reference numerals with dashes “′” and “” ”, and will not be redundantly described. The sliding / swinging mechanism 25 ′ according to the present embodiment also has a spherical body 27 as shown in FIG. The action rod 10 is inserted into the spherical body 27 so as to be slidable in the axial direction, and the outer surface of the spherical body 27 is supported by the vehicle body mounting plate 20 '. According to the embodiment shown in FIGS. 2C and 2D, the vehicle body mounting plate 20 ′ is divided into two upper and lower plates 20′u and 20′d, and the thickness direction of the respective divided surfaces is divided. A bearing having a half concave surface that receives the spherical body 27 is formed at the center. A part of the periphery of the vehicle body mounting plate 20 ′ is cut off to form flanges 20f and 20f. By tightening these flanges 20f and 20f with bolts and nuts 20b, 20b,... d is integrated and the spherical body 27 is rotatably held between the divided surfaces. Also in the present embodiment, the action rod 10 is slidable and swingable with respect to the vehicle body mounting plate 20 ', and acts in the same manner as the embodiment shown in FIG.

  FIGS. 2A and 2B show an example in which the vehicle body mounting plate 20 ″ is divided in parallel with the surface, and concave curved surfaces for receiving the spherical bodies 27 are formed on the respective divided surface sides. The divided mounting plates 20 ″ u, 20 ″ d are tightened with bolts 20b, 20b,... To integrate the divided mounting plates 20 ″ u, 20 ″ d. This embodiment also functions in the same manner as the embodiment shown in FIG.

S shock absorber G rubber shock absorber F viscous fluid shock absorber 1 first rubber shock absorber 2 second rubber shock absorber 10 action rod 20 vehicle body mounting plate 25 sliding / swinging mechanism
30 Cylinder 31 Bottom (first push plate)
35 Piston body 36 Connecting part

Claims (2)

A rubber buffer portion that absorbs a relatively small impact that occurs during traveling, and a viscous fluid buffer portion that absorbs a relatively large impact than the impact that occurs during a collision, and the rubber buffer portion is a pair having a predetermined diameter. From the first and second rubber shock absorbers, the viscous fluid buffer portion is composed of a cylinder filled with the viscous fluid and a piston body slidably provided in the cylinder,
The pair of first and second rubber shock absorbers are arranged with initial pressure loaded on both sides of the vehicle body mounting plate,
When a working rod that passes through the pair of first and second rubber shock absorbers and the vehicle body mounting plate and freely moves in the axial direction and the rotation direction or the swinging direction with respect to the vehicle body mounting plate moves in one direction, When one rubber shock absorber of the pair of first and second rubber shock absorbers moves in the other direction, the other rubber shock absorber is compressed and buffered, and when the rubber shock absorber rotates or swings in a predetermined direction, A shock absorber in which predetermined portions of the first and second rubber shock absorbers are compressed and buffered,
One end of the action rod is rigidly connected to the viscous fluid buffer portion.   The shock absorber according to claim 1, wherein one end of the working rod is rigidly connected to a cylinder constituting the viscous fluid buffer portion.

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