Hook-type turnout external locking device and turnout switching equipment

Abstract

The invention belongs to the technical field of rail transit, and discloses a hook type turnout external locking device and turnout switching equipment, and the device comprises a locking rod, a lock hook and a baffle plate; the connecting end of the lock hook is connected with the switch rail, the two baffles are fixedly attached to the two side faces of the lock hook respectively, and the locking rod is located between the two baffles and located below the lock hook. The locking rod comprises a rod body and a guide wheel assembly, the guide wheel assembly comprises a guide wheel shaft, a first guide wheel and a second guide wheel, the guide wheel shaft is fixedly connected with the rod body, one end of the guide wheel shaft extends to the outside of the top face of the rod body and is rotationally connected with the first guide wheel, and the other end of the guide wheel shaft extends to the outside of the bottom face of the rod body and is rotationally connected with the second guide wheel. The first guide wheel and the second guide wheel are both located between the two baffles. The locking rod is of a double-guide-wheel structure, the baffles are synchronously optimized according to the positions of the guide wheels, the overturning angle of the lock hook can be reduced, the self-correcting capacity of the lock hook can be improved, and the problems that turnout switching is blocked and unlocking is not smooth are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit, and particularly relates to a hook-type switch external locking device and a switch conversion device. Background Art

[0002] The switch conversion device includes a switch machine, a contact checker, an external locking device for the switch, an installation device, etc. The function of the switch conversion device is to convert and lock the switch and supervise and inspect its position. When a train passes, the conversion device must ensure that the movable part of the switch is fixed in the position of opening the straight track or the branch track. The switch machine is the actuator of the switch conversion device and is a train operation safety device for switching the switch, which can realize the functions of switch conversion, locking and supervision. The external locking device for the switch is a mechanical device that is converted by the switch machine and directly locks the switch rail and the stock rail, and the switch point rail and the wing rail together.

[0003] The switch rail and the stock rail will expand and contract due to thermal expansion and contraction under different temperature conditions, and the switch rail will produce a front-back telescopic creeping effect relative to the stock rail. In severe cases, the creeping amount of the switch rail can reach about 40 mm. Among them, the front-back creep means that the length of the switch rail along its extension direction changes, and the positions of the switch rail connecting iron, the pin shaft and the locking hook connected to it will also change accordingly. The existing external locking device has the following problems: 1. The locking hook flipping angle of the locking hook is too large, resulting in jamming and unsmooth unlocking during switch conversion.

[0004] 2. There are many types of locking rods, and there are many corresponding spare parts on site.

[0005] 3. When the lubrication is poor, there is a large resistance to switch conversion, and in extreme cases, conversion jamming may be caused.

[0006] 4. When the positions of the switch rail connecting iron, the pin shaft and the locking hook deviate too much, conversion jamming will occur, and even the switch rail and the stock rail cannot be locked, or the locking hook cannot be unlocked. Summary of the Invention

[0007] In view of the above problems, the present invention provides a hook-type switch external locking device and a switch conversion device, and adopts the following technical solutions: A hook-type switch external locking device includes a locking rod, a locking hook and a baffle; Wherein, the connecting end of the locking hook is connected to the switch rail, two of the baffles are respectively fixedly attached to both side surfaces of the locking hook, the locking rod is located between the two baffles, and the locking rod is located below the locking hook; The locking rod includes a rod body and a guide wheel assembly. The guide wheel assembly includes a guide wheel shaft, a first guide wheel, and a second guide wheel. The guide wheel shaft is fixedly connected to the rod body. One end of the guide wheel shaft extends to the outside of the top surface of the rod body and is rotatably connected to the first guide wheel. The other end of the guide wheel shaft extends to the outside of the bottom surface of the rod body and is rotatably connected to the second guide wheel. The first guide wheel and the second guide wheel are both located between the two baffles.

[0008] Furthermore, the locking rod further includes a connecting rod. Two rod bodies are detachably connected through the connecting rod. A connecting portion is provided at one end of the rod body, and a mounting table is provided at the other end of the rod body. Mounting grooves matching the mounting tables are provided at both ends of the connecting rod. The mounting table of each rod body is connected to one of the mounting grooves of the connecting rod.

[0009] Furthermore, the cross-sectional shapes of the mounting table and the mounting groove are trapezoidal.

[0010] Furthermore, the locking rod further includes an insulating board tube, a first insulating pad, and a second insulating pad; Among them, the insulating board tube is arranged between the mounting table and the mounting groove. The first insulating pad is arranged on the side of the connecting rod facing away from the rod body. The second insulating pad is arranged on the side of the rod body facing away from the connecting rod.

[0011] Furthermore, a plurality of third through holes are arranged along the length direction of the mounting table, and a plurality of fourth through holes are arranged along the length direction in the mounting groove. Each third through hole corresponds to one fourth through hole; The insulating board tube includes an insulating board body and a plurality of insulating tubes arranged on the insulating board body. Each third through hole corresponds to one insulating tube. The insulating board body is located between the mounting table and the mounting groove. The bottom of each insulating tube penetrates through one third through hole, and the top penetrates through one fourth through hole.

[0012] Furthermore, the locking hook includes a hook body and a connection end connected to the hook body. The connection end is connected to the switch rail.

[0013] Furthermore, a locking seat is further included. The locking seat includes a locking frame, a locking iron, a support block, a fixing bolt, and a stop block; Among them, the locking frame is arranged on the outer side of the stock rail. The top of the locking frame is fixedly connected to the web of the stock rail. A channel is provided in the middle of the locking frame. The channel runs through the locking frame along the width direction of the stock rail. The locking iron is located at the top of the channel. One side of the fixing bolt fixedly connects the locking iron to the locking frame, and the bent groove on the other side of the fixing bolt is stuck on the bottom end face of the stock rail. The hook body is movably arranged in the channel and is located below the locking iron. The rod body passes through the channel and is located below the hook body. The support block is arranged on one side of the bottom of the locking frame away from the stock rail, and the stop block is arranged on one side of the bottom of the locking frame close to the stock rail. The support block is fixedly connected to the stop block. A first sliding groove communicating with the channel is provided at the top of the support block, and a second sliding groove communicating with the channel is provided at the top of the stop block. The rod body slides in the first sliding groove, the channel and the second sliding groove.

[0014] Furthermore, a sliding table is arranged in the first sliding groove. The sliding table extends into the channel. The lower surface of the rod body slides on the upper surface of the sliding table. A plurality of blind holes are provided on the upper surface of the sliding table, and a self-lubricating gasket is embedded in each blind hole.

[0015] Furthermore, grooves are provided on both sides of one end of the rod body at the connecting part, and convex platforms matching the grooves are provided on both sides of the inner wall surface of the first sliding groove. The convex platforms are slidably connected to the grooves.

[0016] The present invention also provides a turnout conversion device, including the hook-type turnout external locking device described above.

[0017] Advantages of the present invention: 1. The locking rod of the present invention adopts an upper and lower double-guide wheel structure (the first guide wheel and the second guide wheel), which can synchronously optimize the baffle of the locking hook according to the position of the guide wheel, can reduce the flipping angle of the locking hook, and improve the self-correcting ability of the locking hook, thereby avoiding the jamming and unsmooth unlocking problems that occur during turnout conversion due to the too large flipping angle of the locking hook.

[0018] 2. The locking rod of the present invention is a three-section connection structure. The installation platform of the locking rod is connected with the installation groove structure of the connecting rod, which can ensure the straightness of the connection of the locking rod.

[0019] 3. The locking rod of the present invention adopts a three-section connection method, which can set the locking rod as a universal part, simplify the types of locking rods, improve the universality of parts, and reduce the types of on-site spare parts.

[0020] 4. The two locking rods of the present invention are respectively connected to both ends of the connecting rod. The connecting rod and the two locking rods are separated by three layers of insulating pads, and the middle layer is an integrated insulation of an insulating plate and a tube, which is convenient for on-site assembly, improving the assembly efficiency and insulation reliability.

[0021] 5. The sliding table of the support block of the present invention is inlaid with a self-lubricating material, which can reduce the sliding friction resistance between the support block and the locking rod, improving the wear resistance.

[0022] Other features and advantages of the present invention will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 FIG. shows a cross-sectional view of an external locking device for a hook-type turnout according to an embodiment of the present invention; Figure 2 FIG. shows a side view of an external locking device for a hook-type turnout according to an embodiment of the present invention; Figure 3 FIG. shows an installation schematic diagram of a bearing and a pin shaft according to an embodiment of the present invention; Figure 4 FIG. shows a connection schematic diagram of two rod bodies and a connecting rod according to an embodiment of the present invention; Figure 5 FIG. shows a structural schematic diagram of a connecting rod according to an embodiment of the present invention; Figure 6 FIG. shows a structural schematic diagram of a rod body according to an embodiment of the present invention; Figure 7 FIG. shows an installation schematic diagram of an insulating plate tube with a rod body and a connecting rod according to an embodiment of the present invention; Figure 8 FIG. shows a structural schematic diagram of an insulating plate tube according to an embodiment of the present invention; Figure 9 FIG. shows a structural schematic diagram of the position adjustment of a single guide wheel to a locking hook according to an embodiment of the present invention; Figure 10 FIG. shows a structural schematic diagram of the position adjustment of a double guide wheel to a locking hook according to an embodiment of the present invention; Figure 11Shows a schematic structural diagram of a locking seat according to an embodiment of the present invention; Figure 12 Shows a schematic installation diagram of a locking frame, a support block, and a stop block according to an embodiment of the present invention; Figure 13 Shows a schematic structural diagram of a support block according to an embodiment of the present invention.

[0025] In the figure: 1. Locking rod; 2. Lock hook; 3. Switch rail; 4. Connection iron; 5. Pin shaft; 6. Baffle plate; 7. Retaining ring; 8. Bearing; 9. Sealing ring; 10. Plug; 11. Hook body; 12. Connection end; 13. Stock rail; 14. Rod body; 15. Connecting rod; 16. Insulated plate tube; 17. First insulating backing plate; 18. Second insulating backing plate; 19. Second through hole; 20. Installation table; 21. Installation groove; 22. Third through hole; 23. Fourth through hole; 24. Insulated plate body; 25. Insulated tube; 26. Protrusion; 27. Groove; 28. Guide wheel assembly; 29. Guide wheel shaft; 30. First guide wheel; 31. Second guide wheel; 32. Fifth through hole; 33. Locking frame; 34. Support block; 35. Locking iron; 36. Fixed bolt; 37. Stop block; 38. Fixed part; 39. Channel; 40. First chute; 41. Second chute; 42. Slide table; 43. Blind hole; 44. Groove; 45. Boss.[[ID=~10]] Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present application described herein. In this application, the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are based on the orientation or positional relationships shown in the drawings.

[0028] The present invention provides a hook-type turnout external locking device and a turnout conversion device, which can reduce the flipping angle of the locking hook and improve the self-correcting ability of the locking hook, thereby avoiding the jamming and unsmooth unlocking problems that occur during turnout conversion due to too large a flipping angle of the locking hook. The locking rods at each traction point of the hook-type turnout external locking device of the present invention can be universal, which can reduce the types of parts, improve the universality of parts, and facilitate on-site management and maintenance. By using self-lubricating materials, the situation of poor lubrication can be avoided, the turnout conversion resistance can be reduced, and the occurrence of conversion jamming can be prevented.

[0029] As Figure 1 shown, a hook-type turnout external locking device includes a locking rod 1, a locking hook 2, a baffle 6 and a locking seat. Among them, the connecting end 12 of the locking hook 2 is connected to the switch rail 3.

[0030] As Figure 2 and Figure 3 shown, for example, the hook-type turnout external locking device further includes a bearing 8 and a pin shaft 5. The locking hook 2 and the switch rail 3 are connected through the bearing 8 and the pin shaft 5. A first through hole is provided at the connecting end 12 of the locking hook 2. The connecting end 12 of the locking hook 2 is the end of the locking hook 2 for connecting with the switch rail 3 or the end of the locking hook 2 for connecting with the switch rail 3 through an intermediate member.

[0031] The outer ring of the bearing 8 is relatively fixed to the inner wall of the first through hole, that is, the inner ring of the bearing 8 can rotate relative to the inner wall of the first through hole. The pin shaft 5 passes through the inner ring of the bearing 8, and the pin shaft 5 can slide relative to the inner ring of the bearing 8. The telescopic creep of the switch rail 3 can drive the pin shaft 5 to slide relative to the inner ring of the bearing 8. That is, when the switch rail 3 creeps due to thermal expansion and contraction, it will drive the pin shaft 5 to move forward and backward. When the pin shaft 5 moves with the switch rail 3, the position of the bearing 8 remains unchanged, and the pin shaft 5 slides relative to the inner ring of the bearing 8.

[0032] For example, the axial direction of the pin shaft 5 can be parallel to the creep direction of the switch rail 3, or the axial direction of the pin shaft 5 can be parallel to the extension direction of the switch rail 3.

[0033] As Figure 2 shown, two baffles 6 are provided. The two baffles 6 are respectively fixedly attached to the two side surfaces of the locking hook 2, and the locking rod 1 is located between the two baffles 6. That is, both the locking hook 2 and the locking rod 1 are located between the two baffles 6, and the locking rod 1 is located below the locking hook 2. If the locking hook 2 moves, it will drive the two baffles 6 to move, and then the baffles 6 will abut against the locking rod 1 and stop moving, so as to realize the limiting effect of the locking rod 1 on the baffles 6 and thus ensure the position of the locking hook 2 remains unchanged.

[0034] In the present invention, the locking hook 2 and the switch rail 3 are connected through a bearing 8 and a pin shaft 5. The outer ring of the bearing 8 is fixedly arranged relative to the locking hook 2, and baffles 6 are arranged on both sides of the locking hook 2. The two baffles 6 limit the locking hook 2 and the locking rod 1, so that the pin shaft 5 can slide relative to the inner ring of the bearing 8 when crawling and moving along with the switch rail 3. In this way, when the switch rail 3 is locked with the stock rail 13, the axis of the first through hole of the locking hook 2 and the axis of the pin shaft 5 are not absolutely parallel, and a certain angle is generated between the inner ring and the outer ring of the bearing 8, so that the axis of the inner ring of the bearing 8 is kept parallel to the axis of the pin shaft 5, ensuring that the first through hole of the locking hook 2 and the pin shaft 5 will not get stuck.

[0035] When the switch rail 3 expands and contracts and crawls, the position where the switch rail 3 is connected to the pin shaft 5 or the position where the switch rail 3 is connected to the pin shaft 5 through an intermediate member will move back and forth. The switch rail 3 drives the pin shaft 5 to move back and forth. When the pin shaft 5 moves back and forth, it will slide relative to the inner ring of the bearing 8, ensuring that the pin shaft 5 will not drive the locking hook 2 to move, so that the locking hook 2 is always located above the locking rod 1, thereby avoiding the occurrence of jamming when the outer locking device of the hook-type turnout locks the switch rail 3 and the stock rail 13, and at the same time avoiding the occurrence of the situation where the switch rail 3 and the stock rail 13 cannot be locked or the unlocking is not smooth after locking.

[0036] For example, the bearing 8 can be a spherical plain bearing 8. When the axis of the first through hole of the locking hook 2 and the axis of the pin shaft 5 are not absolutely parallel, a certain angle is generated between the inner ring and the outer ring of the bearing 8, ensuring that the axis of the inner ring of the bearing 8 is kept parallel to the axis of the pin shaft 5, and the first through hole of the locking hook 2 and the pin shaft 5 will not get stuck. Of course, the bearing 8 can also be a deep groove ball bearing 8 or other ordinary bearings 8, which is not limited herein.

[0037] For example, the outer ring of the bearing 8 and the inner wall of the first through hole can be in interference fit. Of course, the outer ring of the bearing 8 and the inner wall of the first through hole can also be clamped or welded to each other, etc., which is not limited herein.

[0038] As Figure 2 and Figure 3 shown, for example, in order to prevent the bearing 8 from shifting in position in the first through hole, two retaining rings 7 are fixedly arranged in the first through hole of the locking hook 2, and the two retaining rings 7 respectively abut against both sides of the outer ring of the bearing 8. In this way, both sides of the outer ring of the bearing 8 are abutted against the retaining rings 7, and the retaining rings 7 are fixedly connected to the inner wall of the first through hole, avoiding the bearing 8 from shifting in position. Further, the retaining rings 7 and the inner wall of the first through hole can be in interference fit. Of course, they can also be threadedly connected or clamped, which is not limited herein.

[0039] As Figure 2 and Figure 3As shown, for example, in order to prevent dust and oil from entering the first through hole, a sealing ring 9 is further provided between the retaining ring 7 and the pin shaft 5. The outer side of the sealing ring 9 abuts against the retaining ring 7, the inner side of the sealing ring 9 abuts against the pin shaft 5, the sealing ring 9 is fixedly connected to the retaining ring 7, and the pin shaft 5 can slide relative to the sealing ring 9. In this way, dust and oil will no longer enter the interior of the first through hole through the gap between the retaining ring 7 and the pin shaft 5, thereby avoiding serious wear of the bearing 8 and extending the service life of the bearing 8.

[0040] For example, the two baffles 6 and the locking hook 2 can be fixedly connected by bolts or can be welded. The baffle 6 can also be fixedly connected to other supporting members by bolts to facilitate the support of the baffle 6 and the locking hook 2.

[0041] The baffle 6 can be a metal plate to ensure the strength of the baffle 6. Of course, the baffle 6 can also be made of other materials, such as a wooden board, which is not limited here.

[0042] As Figure 1 shown, for example, the locking hook 2 includes a hook body 11 and a connection end 12 connected to the hook body 11. The connection end 12 can be connected to the switch rail 3 through an intermediate member or directly, the hook body 11 is horizontally arranged, and the connection end 12 can be vertically arranged. Among them, the first through hole can be provided in the upper part of the connection end 12, so that it is more convenient for the connection of the pin shaft 5. Of course, the first through hole can also be located in the middle of the connection end 12, which is not limited here. The baffle 6 only fits against the side surface of the connection end 12.

[0043] As Figure 1 shown, for example, in order to facilitate the connection between the pin shaft 5 and the switch rail 3, the external locking device of the hook-type turnout further includes a connecting iron 4 fixedly connected to the switch rail 3. The pin shaft 5 passes through the connecting iron 4 and is hinged to it, and the connecting iron 4 can drive the pin shaft 5 to slide along the direction parallel to the crawling direction of the switch rail 3. That is, the pin shaft 5 can rotate relative to the connecting iron 4. When the switch rail 3 crawls, the position of the connecting iron 4 will move with the switch rail 3, and then the connecting iron 4 drives the pin shaft 5 to move.

[0044] For example, the pin shaft 5 can also be fixedly connected to the connecting iron 4. In this way, when the switch rail 3 crawls, the position of the connecting iron 4 will move with the switch rail 3, and then the connecting iron 4 drives the pin shaft 5 to move. The pin shaft 5 and the connecting iron 4 can be welded to each other or connected by bolts, which is not limited here.

[0045] For example, in order to facilitate the injection of lubricating oil into the first through hole to reduce the friction of the bearing 8, a guide hole communicating with the first through hole is provided on the upper wall of the locking hook 2, and one end of the guide hole located on the upper wall of the locking hook 2 can be blocked by a plug 10. In this way, when lubricating oil needs to be injected, the plug 10 can be removed, and then lubricating oil can be injected into the first through hole through the guide hole. After injection, the plug 10 can be blocked again.

[0046] like Figure 4 and Figure 7 As shown, for example, the locking rod 1 includes a rod body 14, a connecting rod 15, an insulating plate tube 16, a first insulating pad 17 and a second insulating pad 18. The two rod bodies 14 are detachably connected by the connecting rod 15. A connecting portion is provided at one end of the rod body 14. The rod body 14 is connected to the switch machine through the connecting portion. For example, the connecting portion is arc-shaped and a second through hole 19 is provided on the connecting portion.

[0047] like Figure 6 As shown, the other end of the rod body 14 is provided with a mounting platform 20, as shown in FIG. Figure 5 As shown, both ends of the connecting rod 15 are provided with mounting grooves 21 matching the mounting platforms 20, and the mounting platforms 20 of each rod body 14 are connected to one mounting groove 21 of the connecting rod 15. For example, the cross-sectional shape of the mounting platforms 20 and the mounting grooves 21 can be set to be trapezoidal.

[0048] The locking rod 1 of the embodiment of the present invention has a three-section connection structure. The mounting platform 20 of the locking rod 1 is connected in a coordinated manner with the mounting groove 21 of the connecting rod 15 to ensure the straightness of the connection of the locking rod 1.

[0049] The insulating plate tube 16 is arranged between the mounting platform 20 and the mounting groove 21, the first insulating pad 17 is arranged on the side of the connecting rod 15 facing away from the rod body 14, and the second insulating pad 18 is arranged on the side of the rod body 14 facing away from the connecting rod 15. In this embodiment of the present invention, three layers of insulating pads are arranged between the rod body 14 and the connecting rod 15, namely, upper, middle and lower layers, and the middle layer insulating plate tube 16 is insulated as a whole, which is convenient for on-site assembly and improves assembly efficiency and insulation reliability.

[0050] For example, each rod body 14 is fixedly connected to one end of the connecting rod 15 by a plurality of bolts, for example, Figure 6 As shown, the mounting platform 20 is provided with a plurality of third through holes 22 along the length direction. Figure 5 As shown, a plurality of fourth through holes 23 are provided in the mounting groove 21 along the length direction, and one fourth through hole 23 is correspondingly provided for each third through hole 22 .

[0051] like Figure 8 As shown, for example, the insulating plate tube 16 includes an insulating plate body 24 and a plurality of insulating tubes 25 arranged on the insulating plate body 24, and an insulating tube 25 is correspondingly provided for each third through hole 22. The insulating plate body 24 is located between the mounting platform 20 and the mounting groove 21. The bottom of each insulating tube 25 passes through a third through hole 22, and the top passes through a fourth through hole 23. The bolts pass through the first insulating pad 17, the insulating tube 25, the second insulating pad 18 in sequence and are threadedly connected to the nut, thereby fixing the rod body 14 and the connecting rod 15.

[0052] In the embodiments of the present invention, the two locking rods 1 are respectively connected to both ends of the connecting rod 15 through a plurality of bolts. The connecting rod 15 and the two locking rods 1 are separated by three layers of insulating pads, and the middle layer is integrally insulated by an insulating pipe 16, which is convenient for on-site assembly, improving the assembly efficiency and insulation reliability.

[0053] The embodiments of the present invention are optimized on the basis of the existing GW type external locking device. By adopting a three-stage connection method, the locking rod 1 can be set as a common part, simplifying the types of the locking rod 1, improving the versatility of parts, and reducing the types of on-site spare parts.

[0054] As Figure 1 shown, for example, a protrusion 26 is provided on one side of the rod body 14 facing the hook body 11, and a groove 27 is correspondingly provided on one side of the hook body 11 facing the rod body 14. The cooperation between the protrusion 26 and the groove 27 can lock or unlock the locking rod 1.

[0055] As Figure 1 shown, for example, the locking rod 1 further includes a guide wheel assembly 28. The guide wheel assembly 28 is fixedly arranged on the rod body 14. As Figure 4 shown, for example, the guide wheel assembly 28 is located between the protrusion 26 and the mounting table 20.

[0056] As Figure 9 shown, for example, the guide wheel assembly 28 includes a guide wheel shaft 29 and a first guide wheel 30. The guide wheel shaft 29 is fixedly connected to the rod body 14. One end of the guide wheel shaft 29 extends to the outside of the top surface of the rod body 14 and is rotatably connected to the first guide wheel 30. In the single-guide wheel structure of the guide wheel assembly 28 in this embodiment, due to the limitation of only one first guide wheel 30, the shaking angle of the locking hook 2 is relatively large.

[0057] As Figure 10 shown, for example, the guide wheel assembly 28 includes a guide wheel shaft 29, a first guide wheel 30 and a second guide wheel 31. The guide wheel shaft 29 is fixedly connected to the rod body 14. One end of the guide wheel shaft 29 extends to the outside of the top surface of the rod body 14 and is rotatably connected to the first guide wheel 30. The other end of the guide wheel shaft 29 extends to the outside of the bottom surface of the rod body 14 and is rotatably connected to the second guide wheel 31. Among them, the top surface of the rod body 14 is the side surface of the rod body 14 facing the locking hook 2, and the bottom surface of the rod body 14 is the side surface of the rod body 14 facing away from the locking hook 2. Both the first guide wheel 30 and the second guide wheel 31 are located between the two baffles 6.

[0058] As Figure 6 shown, for example, a fifth through hole 32 is provided on the rod body 14 between the protrusion 26 and the mounting table 20. The guide wheel shaft 29 is fixedly connected in the fifth through hole 32. For example, the guide wheel shaft 29 can be in interference fit with the fifth through hole 32.

[0059] In the locking rod 1 of the external locking device of the hook-type turnout according to the embodiment of the present invention, an upper and lower double-guide wheel structure (a first guide wheel 30 and a second guide wheel 31) is adopted. The second guide wheel 31 of the guide wheel assembly 28 can further limit the deflection angle of the two side baffles 6. Therefore, the shaking angle of the locking hook 2 is relatively small. Therefore, by adopting the double-guide wheel structure to synchronously optimize the baffle 6 of the locking hook 2 according to the position of the guide wheel, the flipping angle of the locking hook 2 can be reduced, and the self-correcting ability of the locking hook 2 can be improved, thereby avoiding the jamming and unsmooth unlocking problems that occur during the turnout conversion due to the excessive flipping angle of the locking hook 2.

[0060] As Figure 11 shown, for example, the locking seat includes a locking frame 33, a support block 34, a locking iron 35, a fixing bolt 36 and a stop block 37. Among them, as Figure 1 shown, the locking frame 33 is arranged on the outside of the stock rail 13, and the top of the locking frame 33 is fixedly connected to the web of the stock rail 13.

[0061] As Figure 11 and Figure 12 shown, for example, the top of the locking frame 33 is provided with an L-shaped fixing part 38, and the L-shaped fixing part 38 is provided with a kidney-shaped hole. The bolt passes through the kidney-shaped hole and is fixedly connected to the web of the stock rail 13.

[0062] As Figure 12 shown, the middle part of the locking frame 33 is provided with a channel 39. The channel 39 runs through the locking frame 33 along the width direction of the stock rail 13. The locking iron 35 is located at the top of the channel 39. One side of the fixing bolt 36 fixes the locking iron 35 to the locking frame 33, and the bent groove on the other side of the fixing bolt 36 is stuck on the bottom end face of the stock rail 13.

[0063] As Figure 1 shown, the hook body 11 is movably arranged in the channel 39 and is located below the locking iron 35. The rod body 14 passes through the channel 39 and the rod body 14 is located below the hook body 11.

[0064] The support block 34 is arranged on one side of the bottom of the locking frame 33 far from the stock rail 13, and the stop block 37 is arranged on one side of the bottom of the locking frame 33 close to the stock rail 13. The support block 34 is fixedly connected to the stop block 37. For example, the support block 34 and the stop block 37 are connected by bolts.

[0065] As Figure 12 shown, the top of the support block 34 is provided with a U-shaped first sliding groove 40 communicating with the channel 39, and the top of the stop block 37 is provided with a U-shaped second sliding groove 41 communicating with the channel 39. The rod body 14 slides in the first sliding groove 40, the channel 39 and the second sliding groove 41.

[0066] As Figure 12 and Figure 13As shown, for example, a slide table 42 is provided in the first sliding groove 40 of the support block 34. The slide table 42 extends into the channel 39. The upper surface of the slide table 42 is flush with the bottom surface of the second sliding groove 41. The upper surface of the slide table 42 contacts the lower surface of the rod body 14. The lower surface of the rod body 14 slides on the upper surface of the slide table 42. A plurality of blind holes 43 are provided on the upper surface of the slide table 42. For example, the plurality of blind holes 43 are arranged in an array. A self-lubricating gasket is embedded in each blind hole 43. The self-lubricating gasket can reduce the sliding friction resistance between the slide table 42 and the rod body 14 and improve wear resistance.

[0067] For example, the self-lubricating gasket can be made of materials such as molybdenum disulfide, graphite, fluorinated graphite or boron nitride.

[0068] As Figure 6 shown, for example, grooves 44 are provided on both sides of one end of the rod body 14 at the connecting portion. As Figure 12 and Figure 13 shown, convex platforms 45 matching the grooves 44 are provided on both sides of the inner wall surface of the first sliding groove 40. The convex platforms 45 are slidably connected to the grooves 44. The two convex platforms 45 on the inner wall surface of the support block 34 are inserted into the grooves 44 on both sides of the locking rod 1 to guide the movement of the locking rod 1.

[0069] Based on the hook-type switch external locking device provided in the above embodiments, the present invention also provides a switch conversion device, which includes any one of the hook-type switch external locking devices in the above embodiments. Since the railway switch conversion device adopts the hook-type switch external locking device in the above embodiments, the beneficial effects of the railway switch conversion device can be referred to the above embodiments.

[0070] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hook-type turnout external locking device, characterized in that, It includes a locking rod (1), a locking hook (2) and a baffle (6); Among them, the connecting end (12) of the locking hook (2) is connected to the switch rail (3), two of the baffles (6) are respectively fixedly attached to both side surfaces of the locking hook (2), the locking rod (1) is located between the two baffles (6), and the locking rod (1) is located below the locking hook (2); The locking rod (1) includes a rod body (14) and a guide wheel assembly (28), the guide wheel assembly (28) includes a guide wheel shaft (29), a first guide wheel (30) and a second guide wheel (31), the guide wheel shaft (29) is fixedly connected to the rod body (14), one end of the guide wheel shaft (29) extends to the outside of the top surface of the rod body (14) and is rotatably connected to the first guide wheel (30), the other end of the guide wheel shaft (29) extends to the outside of the bottom surface of the rod body (14) and is rotatably connected to the second guide wheel (31), and both the first guide wheel (30) and the second guide wheel (31) are located between the two baffles (6).

2. The hook-type turnout external locking device according to claim 1, characterized in that The locking rod (1) further includes a connecting rod (15). Among them, the two rod bodies (14) are detachably connected by the connecting rod (15). A connecting portion is provided at one end of the rod body (14), and a mounting table (20) is provided at the other end of the rod body (14). Mounting grooves (21) matching the mounting table (20) are provided at both ends of the connecting rod (15), and the mounting table (20) of each rod body (14) is connected to one of the mounting grooves (21) of the connecting rod (15).

3. The hook-type turnout external locking device according to claim 2, characterized in that, The cross-sectional shapes of the mounting table (20) and the mounting groove (21) are trapezoidal.

4. The hook-type turnout external locking device according to claim 2, wherein The locking rod (1) further includes an insulating board tube (16), a first insulating cushion plate (17) and a second insulating cushion plate (18); Among them, the insulating board tube (16) is arranged between the mounting table (20) and the mounting groove (21), the first insulating cushion plate (17) is arranged on the side of the connecting rod (15) facing away from the rod body (14), and the second insulating cushion plate (18) is arranged on the side of the rod body (14) facing away from the connecting rod (15).

5. The hook-type turnout external locking device according to claim 4, characterized in that, A plurality of third through holes (22) are arranged along the length direction of the mounting table (20), and a plurality of fourth through holes (23) are arranged along the length direction in the mounting groove (21), and each of the third through holes (22) is correspondingly provided with one of the fourth through holes (23); The insulating board tube (16) includes an insulating board body (24) and a plurality of insulating tubes (25) arranged on the insulating board body (24). Each of the third through holes (22) is correspondingly provided with one of the insulating tubes (25). The insulating board body (24) is located between the mounting table (20) and the mounting groove (21). The bottom of each insulating tube (25) penetrates through one of the third through holes (22), and the top penetrates through one of the fourth through holes (23).

6. The hook-type switch external locking device according to any one of claims 2-5, characterized in that The locking hook (2) includes a hook body (11) and a connecting end (12) connected to the hook body (11), and the connecting end (12) is connected to the switch rail (3).

7. The hook-type turnout external locking device according to claim 6, characterized in that It further includes a locking seat, and the locking seat includes a locking frame (33), a locking iron (35), a support block (34), a fixing bolt (36) and a stop block (37); Among them, the locking frame (33) is arranged on the outer side of the stock rail (13), the top of the locking frame (33) is fixedly connected to the web of the stock rail (13), a channel (39) is arranged in the middle of the locking frame (33), the channel (39) runs through the locking frame (33) along the width direction of the stock rail (13), the locking iron (35) is located at the top of the channel (39), one side of the fixing bolt (36) fixedly connects the locking iron (35) and the locking frame (33), and the bent groove on the other side of the fixing bolt (36) is stuck on the bottom end face of the stock rail (13); the hook body (11) is movably arranged in the channel (39) and is located below the locking iron (35), the rod body (14) passes through the channel (39), and the rod body (14) is located below the hook body (11); The support block (34) is arranged on one side of the bottom of the locking frame (33) away from the stock rail (13), the stop block (37) is arranged on one side of the bottom of the locking frame (33) close to the stock rail (13), and the support block (34) is fixedly connected to the stop block (37); a first sliding groove (40) communicating with the channel (39) is arranged at the top of the support block (34), a second sliding groove (41) communicating with the channel (39) is arranged at the top of the stop block (37), and the rod body (14) slides in the first sliding groove (40), the channel (39) and the second sliding groove (41).

8. The hook-type turnout external locking device according to claim 7, characterized in that, A sliding table (42) is arranged in the first sliding groove (40), the sliding table (42) extends into the channel (39), the lower surface of the rod body (14) slides on the upper surface of the sliding table (42), and a plurality of blind holes (43) are arranged on the upper surface of the sliding table (42), and a self-lubricating gasket is embedded in each blind hole (43).

9. The hook-type turnout external locking device according to claim 8, characterized in that, Grooves (44) are arranged on both sides of one end of the rod body (14) at the connecting part, and protrusions (45) matching the grooves (44) are arranged on both sides of the inner wall surface of the first sliding groove (40), and the protrusions (45) are slidably connected with the grooves (44).

10. A switch conversion device, characterized in that, It includes the hook-type turnout external locking device according to any one of claims 1-9.

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