Point rail anti-bounce limiting device and switch

Abstract

The utility model discloses a switch rail anti-bounce limiting device and a switch, which comprise a slide plate, two supports and an iron clamp, the two supports are arranged on the slide plate at intervals along the extension direction of a switch rail, and pulleys in rolling connection with the bottom surface of the rail bottom of the switch rail are arranged on the supports; the iron clamp comprises a base part arranged between the two supports, a limiting part used for pressing the rail bottom and an adjusting piece used for adjusting the distance between the base part and the limiting part, and the base part is connected with the supports through first pin shafts. The anti-jumping limiting device for the switch rail and the switch are simple in structure, convenient to disassemble and assemble and capable of improving maintenance efficiency, the pulleys on the supports can share pressure of the rail bottom of the switch rail on the sliding bed table, sliding connection between the sliding bed table and the bottom face of the rail bottom of the switch rail is changed into rolling connection between the pulleys and the bottom face of the rail bottom of the switch rail, and therefore friction force is reduced, and the service life of the switch rail is prolonged. The pulling force during the switch operation of the turnout can be reduced, scratches on the bottom of the switch rail and the surface of the bedplate can be reduced, the noise is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of turnouts, and in particular to a stock rail anti-jump limiting device. In addition, the utility model also relates to a switch including the above stock rail anti-jump limiting device. Background Art

[0002] The stock rail is an important component in the switch. Driven by the switching equipment, the stock rail guides the train into the main line or the siding direction. The stock rail adopts the AT rail and the cross-section is milled at the front end, and there is no fastener connection between the movable part and the slide plate. At present, the common solution in domestic turnouts is that the front part of the stock rail is the hidden point type. When the stock rail is in close contact with the basic rail, its vertical displacement is restricted by the anti-jump platform under the lower jaws of the stock rail and the basic rail. For the separated stock rail, a stock rail anti-jump device needs to be set to maintain the spatial position of the separated stock rail and prevent the separated stock rail from jumping due to vibration when the train passes through the turnout.

[0003] The prior art such as Chinese Patent CN204251978U discloses a stock rail anti-jump device for a tram. By arranging an anti-jump limiting block on the stock rail seat, a step protrudes from the lower part of the tip of the stock rail, and a groove adapted to the step is arranged on the anti-jump limiting block. The vertical direction of the step is limited by the groove to prevent the stock rail from jumping when moving back and forth.

[0004] Since the use environment of the stock rail is usually a large load, high impact, and open-air environment, the stock rail is slidably connected to the stock rail seat, and the step at the lower part of the tip of the stock rail and the groove on the anti-jump limiting block are slidably connected. On the one hand, it results in a large frictional resistance to move the stock rail, and a large pulling force is required to drive the stock rail to move. On the other hand, the back-and-forth movement of the stock rail will cause scratches at the friction part. The scratched part is prone to rust in the open-air environment, resulting in a shortened service life or even loss of function. Summary of the Utility Model

[0005] The utility model provides a stock rail anti-jump limiting device to solve the technical problems of the large frictional force of the existing stock rail anti-jump device, easy generation of scratches at the friction part, and shortened service life or even loss of function caused by scratch rust.

[0006] According to one aspect of the utility model, a stock rail anti-jump limiting device is provided, which includes a slide plate, a support and an iron clamp. The two supports are arranged on the slide plate at intervals along the extension direction of the stock rail, and pulleys that are in rolling connection with the bottom surface of the rail base of the stock rail are arranged on the supports; the iron clamp includes a base arranged between the two supports, a limiting part for pressing the rail base, and an adjusting part for adjusting the distance between the base and the limiting part. The base is connected to the support through a first pin shaft.

[0007] Further, a U-shaped groove with an upward opening is arranged on the support. The pulley includes a rotating shaft adapted to the U-shaped groove and a wheel body sleeved on the rotating shaft. Both ends of the rotating shaft are supported by the corresponding U-shaped grooves on the two supports.

[0008] Further, an anti-rotation sleeve is arranged on the base portion, and an anti-rotation boss adapted to the anti-rotation sleeve is arranged on the limiting portion. The anti-rotation boss is embedded in the anti-rotation sleeve and connected by an adjusting member.

[0009] Further, the adjusting member is a screw rod. A torque application section, a first external thread and a second external thread are respectively arranged on both sides of the torque application section of the screw rod. The rotation directions of the first external thread and the second external thread are opposite. An internal thread adapted to the first external thread is arranged on the anti-rotation sleeve, and an internal thread adapted to the second external thread is arranged on the anti-rotation boss. Windows for exposing the torque application section are opened on the anti-rotation sleeve and the anti-rotation boss.

[0010] Further, an anti-slip structure is arranged on the torque application section.

[0011] Further, rollers that are in rolling connection with the top surface of the rail bottom of the switch rail are arranged on the limiting portion.

[0012] Further, a through hole is opened on the limiting portion, and a second pin shaft is arranged in the through hole. The two rollers are sleeved on the second pin shaft and are respectively arranged on both sides of the limiting portion.

[0013] Further, a protective sleeve is sleeved on the outer circumferential surface of the pulley and / or the roller.

[0014] Further, a mounting hole is arranged on the base portion, a through hole corresponding to the mounting hole is opened on the support, and the first pin shaft passes through the through hole and the mounting hole. The through hole and / or the mounting hole is a kidney-shaped hole.

[0015] According to another aspect of the present invention, a switch is further provided, which includes the above-mentioned switch rail anti-jump limiting device.

[0016] The present invention has the following beneficial effects:

[0017] The anti-jump limit device for the switch rail of the present utility model, when in use, the bottom of the switch rail is jointly supported by the pulley and the slide bed. The limiting part of the iron clamp presses against the bottom surface of the switch rail, thereby realizing the anti-jump function of the switch rail. The slide plate and the slide bed can directly use existing finished products, and the support is installed on the slide plate by welding, which can reduce the manufacturing cost and shorten the manufacturing cycle. The support is connected to the base of the iron clamp through the first pin shaft of the slide plate, with a simple structure and convenient disassembly and assembly, which can improve the efficiency of maintenance. The pulley on the support can share the pressure of the bottom of the switch rail on the slide bed, and change the sliding connection between the slide bed and the bottom surface of the switch rail to a rolling connection between the pulley and the bottom surface of the switch rail, thereby reducing the friction force. This can not only reduce the pulling force during the switch operation of the turnout, but also reduce the scratches on the bottom of the switch rail and the surface of the table board, reduce the noise, and extend the service life. Through the adjusting part, the limiting part can be vertically moved relative to the base, so that the limiting height of the limiting part can be adjusted within a certain range, which is universal for switch rails of different specifications. In addition, when the originally adapted limiting height cannot meet the use requirements after long-term use, the limiting height of the limiting part can be readjusted through the adjusting part to meet the use requirements, which can extend the service life and reduce the use cost.

[0018] In addition to the purposes, features and advantages described above, the present utility model has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0020] Figure 1 is a schematic structural diagram of the anti-jump limit device for the switch rail of the preferred embodiment of the present utility model;

[0021] Figure 2 is a front view of the anti-jump limit device for the switch rail of the preferred embodiment of the present utility model;

[0022] Figure 3 is a top view of the anti-jump limit device for the switch rail of the preferred embodiment of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the iron clamp of the preferred embodiment of the present utility model;

[0024] Figure 5 is a schematic structural diagram of the screw of the preferred embodiment of the present utility model.

[0025] LEGEND DESCRIPTION:

[0026] 1. Slide plate; 2. Support; 21. Pulley; 22. U-shaped groove; 3. Iron clamp; 31. Base; 311. Mounting hole; 312. Anti-rotation sleeve; 32. Limiting part; 321. Anti-rotation boss; 322. Through hole; 33. Screw; 331. Torque application section; 332. First external thread; 333. Second external thread; 34. Roller; 35. First pin shaft; 36. Second pin shaft; 4. Basic rail; 5. Slide table; 6. Switch rail. Detailed implementation manner

[0027] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, the present utility model can be implemented in many different ways defined and covered by the following.

[0028] As Figures 1 to 5 shown, the anti-jump limiting device for the switch rail of this embodiment includes a slide plate 1, a support 2 and an iron clamp 3. Two supports 2 are arranged on the slide plate 1 at intervals along the extension direction of the switch rail 6. A pulley 21 that is in rolling connection with the bottom surface of the rail base of the switch rail 6 is arranged on the support 2; the iron clamp 3 includes a base 31 arranged between the two supports 2, a limiting part 32 for pressing the rail base, and an adjusting member for adjusting the distance between the base 31 and the limiting part 32. The base 31 is connected to the support 2 through a first pin shaft 35.

[0029] The anti-jump limit device for the switch rail in this embodiment, when in use, the bottom of the switch rail 6 is jointly supported by the pulley 21 and the slide bed 5. The limit part 32 of the iron clamp 3 presses against the top surface of the bottom of the switch rail 6, thereby realizing the anti-jump function of the switch rail 6; the slide plate 1 and the slide bed 5 can directly use existing finished products, and the support 2 is installed on the slide plate 1 by welding, which can reduce the manufacturing cost and shorten the manufacturing cycle; the support 2 is connected to the base 31 of the iron clamp 3 through the first pin shaft 35 of the slide plate 1, with a simple structure and convenient disassembly and assembly, which can improve the efficiency of maintenance; the pulley 21 on the support 2 can share the pressure of the bottom of the switch rail 6 on the slide bed 5, and change the sliding connection between the slide bed 5 and the bottom surface of the switch rail 6 to a rolling connection between the pulley 21 and the bottom surface of the switch rail 6, thereby reducing the friction force. This can not only reduce the switching force when the turnout is switched, but also reduce the scratches on the bottom of the switch rail 6 and the surface of the table board, reduce noise, and extend the service life; through the adjusting part, the limit part 32 can move vertically relative to the base 31, so that the limit height of the limit part 32 can be adjusted within a certain range, which is universal for switch rails 6 of different specifications. In addition, when the originally adapted limit height cannot meet the use requirements after long-term use, the limit height of the limit part 32 can be re-adjusted through the adjusting part to meet the use requirements, which can extend the service life and reduce the use cost; it can be understood that threaded holes can also be opened on the slide plate 1 and the bottom surface of the support 2, and fixed connection is carried out through screws, and the support 2 can be replaced to be suitable for iron clamps 3 of different sizes. Optionally, the adjusting part is a hydraulic cylinder or a screw. Optionally, two supports 2 are in a group, and an iron clamp 3 is arranged between each group of supports 2, and multiple groups of supports 2 can be arranged on the slide plate 1 along the extension direction of the switch rail 6 to prevent the switch rail 6 from arching.

[0030] As Figures 1 to 3 shown, in this embodiment, the support 2 is provided with a U-shaped groove 22 with an upward opening. The pulley 21 includes a rotating shaft adapted to the U-shaped groove 22 and a wheel body sleeved on the rotating shaft. Both ends of the rotating shaft are supported by the corresponding U-shaped grooves 22 on the two supports 2; the U-shaped groove 22 has an upward opening, and the operations of putting the rotating shaft into the U-shaped groove 22 and taking the rotating shaft out of the U-shaped groove 22 are both simple and convenient, which can improve the disassembly and assembly efficiency; each support 2 is provided with two U-shaped grooves 22, and the two U-shaped grooves 22 are arranged at intervals along the direction perpendicular to the extension direction of the switch rail 6 to share the pressure and ensure the stability of the support; it can be understood that the number of U-shaped grooves 22 can also be three, four or more, and can be adjusted according to the actual situation; the specifications of the pulley 21 can be selected according to the actual situation.

[0031] As Figure 4As shown, in this embodiment, an anti-rotation sleeve 312 is provided on the base 31, and an anti-rotation boss 321 adapted to the anti-rotation sleeve 312 is provided on the limiting part 32. The anti-rotation boss 321 is embedded in the anti-rotation sleeve 312 and connected by an adjusting member, which can avoid restricting the relative rotation between the limiting part 32 and the base 31 and ensure that the limiting part 32 always presses on the top surface of the rail base of the switch rail 6. In this embodiment, the cross-section of the anti-rotation sleeve 312 is rectangular. It can be understood that the cross-section of the anti-rotation sleeve 312 can also be other polygons.

[0032] In this embodiment, the adjusting member is a screw 33. A torque application section 331 is provided on the screw 33, and first external threads 332 and second external threads 333 are respectively provided on both sides of the torque application section 331. The rotation directions of the first external thread 332 and the second external thread 333 are opposite. An internal thread adapted to the first external thread 332 is provided on the anti-rotation sleeve 312, and an internal thread adapted to the second external thread 333 is provided on the anti-rotation boss 321. Windows for exposing the torque application section 331 are provided on the anti-rotation sleeve 312 and the anti-rotation boss 321; during use, the limiting part 32 and the base 31 are screwed to both ends of the screw 33, and then the base 31 is connected to the support 2 through the first pin 35. The screw 33 is rotated through the torque application section 331, so that the anti-rotation sleeve 312 and the anti-rotation boss 321 move towards / away from each other, thereby adjusting the limiting height of the limiting part 32. The structure is simple, the disassembly and assembly are convenient, and the manufacturing cost is low. Optionally, the torque application section 331 is a driven gear, and the driven gear meshes with a driving gear driven by a motor, so as to realize automatic adjustment and reduce the labor intensity.

[0033] In this embodiment, an anti-slip structure is provided on the torque application section 331 to increase the friction force and facilitate manual rotation of the screw 33. Optionally, the anti-slip structure is one or a combination of straight strip-shaped protrusions, continuously bent strip-shaped protrusions, dot-shaped protrusions or depressions. Optionally, the anti-slip structure is six support surfaces arranged circumferentially along the screw 33, so that the torque application section 331 is similar to a hexagonal nut, which is convenient for manually rotating the screw 33; it can be understood that the number of support surfaces can also be three, four or more, and can be increased or decreased according to the use requirements.

[0034] In this embodiment, rollers 34 are provided on the limiting part 32 and are in rolling connection with the top surface of the rail base of the switch rail 6. The sliding connection between the limiting part 32 and the top surface of the rail base of the switch rail 6 is changed to a rolling connection between the rollers 34 and the top surface of the rail base of the switch rail 6, thereby reducing the friction force. This can not only reduce the switching force during the switch operation of the turnout, but also reduce the surface scratches on the top surface of the rail base of the switch rail 6 and extend the service life.

[0035] In this embodiment, a through hole 322 is provided in the limiting part 32, and a second pin 36 is provided in the through hole 322. Two rollers 34 are sleeved on the second pin 36 and are respectively arranged on both sides of the limiting part 32, which can increase the contact points and ensure the smooth movement of the switch rail 6.

[0036] In this embodiment, a rubber protective sleeve is sleeved on the outer circumferential surface of the pulley 21 and / or the roller 34. The protective sleeve can provide good shock absorption and anti-impact effects. On the one hand, it can reduce noise; on the other hand, it can protect the pulley 21 and the roller 34 from damage, thereby avoiding the corrosion and rust of the frequently friction contact parts and resulting in functional failure. Optionally, the protective sleeve is detachably connected to the pulley 21 and the roller 34. When the protective sleeve fails, the protective sleeve can be directly removed from the pulley 21 or the roller 34, and a new protective sleeve can be installed to continue using, which can achieve rapid maintenance and reduce the use cost.

[0037] In this embodiment, a mounting hole 311 is formed on the base 31, a through hole corresponding to the mounting hole 311 is formed on the support 2, and the first pin shaft 35 passes through the through hole and the mounting hole 311. The through hole and / or the mounting hole 311 is a kidney-shaped hole. In this embodiment, there are two mounting holes 311. It can be understood that the number of mounting holes 311 can be increased according to actual installation requirements.

[0038] A switch includes the above-mentioned stock rail anti-jump limit device, and further includes a stock rail 4 disposed on the slide plate 1, a slide table 5 disposed on the slide plate 1, and a switch rail 6 disposed on the slide table 5. The height of the vertex of the pulley 21 in the vertical direction is equal to the top surface of the slide table 5, so that the pulley 21 can share the pressure of the specified switch rail 6 on the slide table 5.

[0039] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A point rail anti-jump limiter, characterized in that: It comprises a slide bed plate (1), a support (2) and an iron clamp (3), wherein two supports (2) are arranged on the slide bed plate (1) at intervals along the extension direction of the pointed rail, and a pulley (21) is arranged on the support (2) and is rollingly connected to the bottom surface of the rail bottom of the pointed rail; The iron clamp (3) comprises a base (31) arranged between the two supports (2), a limiting portion (32) for pressing the bottom of the rail, and an adjusting member for adjusting the distance between the base (31) and the limiting portion (32); the base (31) and the support (2) are connected via a first pin shaft (35).

2. The point rail anti-jump limiter device according to claim 1, characterized in that: The support (2) is provided with a U-shaped groove (22) with an opening facing upward, and the pulley (21) comprises a rotating shaft adapted to the U-shaped groove (22) and a wheel body sleeved on the rotating shaft, and the two ends of the rotating shaft are respectively supported by the corresponding U-shaped grooves (22) on the two supports (2).

3. The point rail anti-jump limiter device according to claim 1 or 2, characterized in that: The base (31) is provided with an anti-rotation sleeve (312), the limiting portion (32) is provided with an anti-rotation boss (321) adapted to the anti-rotation sleeve (312), and the anti-rotation boss (321) is embedded in the anti-rotation sleeve (312) and connected via an adjusting member.

4. The point rail anti-jump limiter device according to claim 3, characterized in that: The adjusting member is a screw rod (33), and the screw rod (33) is provided with a torsion section (331) and a first external thread (332) and a second external thread (333) respectively arranged on both sides of the torsion section (331), and the first external thread (332) and the second external thread (333) rotate in opposite directions; The anti-rotation sleeve (312) is provided with an internal thread that matches the first external thread (332), the anti-rotation boss (321) is provided with an internal thread that matches the second external thread (333), and the anti-rotation sleeve (312) and the anti-rotation boss (321) are provided with windows for leaking out the torsion section (331).

5. The point rail anti-jump limiter device according to claim 4, characterized in that: The twisting section (331) is provided with an anti-slip structure.

6. The point rail anti-jump limiter device according to claim 3, characterized in that: The limiting portion (32) is provided with a roller (34) which is rollingly connected to the top surface of the rail bottom of the pointed rail.

7. The point rail anti-jump limiter device according to claim 6, characterized in that: The limiting portion (32) is provided with a through hole (322), a second pin shaft (36) is arranged in the through hole (322), and the two rollers (34) are sleeved on the second pin shaft (36) and are respectively arranged on two sides of the limiting portion (32).

8. The point rail anti-jump limiter device according to claim 7, characterized in that: A protective sleeve is sleeved on the outer circumferential surface of the pulley (21) and / or the roller (34).

9. The point rail anti-jump limiter device according to claim 1, characterized in that: The base (31) has a mounting hole (311), the support (2) has a through hole corresponding to the mounting hole (311), the first pin shaft (35) passes through the through hole and the mounting hole (311), and the through hole and / or the mounting hole (311) are waist-shaped holes.

10. A switch, characterized in that: It comprises the point rail anti-jump limit device according to any one of claims 1 to 9.

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