A turnout switch connecting rod anti-falling connecting pin

Abstract

This invention relates to the field of railway facility technology and discloses a switch rail connecting rod anti-detachment connecting pin, comprising a switch rail body, a fixing seat installed on the outer wall of the switch rail body, a connecting rod body disposed on the outer side of the fixing seat, a pin body disposed inside both the fixing seat and the connecting rod body, a boss fixedly connected to the upper side of the pin body, a bushing installed inside the pin body, a steel wire rope wound inside the bushing and the boss, an anti-slip pad installed on the lower surface of the boss, a disc spring disposed inside the anti-slip pad, a screw threadedly connected inside the boss, and a moving mechanism disposed inside the boss. Through the cooperation of the pin body, boss, bushing, steel wire rope, anti-slip pad, disc spring, and screw, the assembly of the fixing seat and the connecting rod body is doubly fixed, eliminating the risk of pin detachment. Even if the pin body breaks, the connection can be maintained by the steel wire rope, preventing the switch rail from losing connection and ensuring train operation safety.

Description

Technical Field

[0001] This invention relates to the field of railway facility technology, specifically to a turnout switch rail connecting rod anti-detachment connecting pin. Background Technology

[0002] In railway turnout systems, the connection structure between the switch rail and the connecting rod is the key component for achieving turnout switching and synchronous movement of the left and right switch rails. Among them, the connecting pin, as the core hinge component, works under alternating loads, impact loads, and high-frequency vibration environments for a long time. Its structural reliability is directly related to the operational safety and stability of the turnout.

[0003] The connection between the switch rail connecting rod and the switch rail in existing railway turnouts generally adopts a single connecting pin and cotter pin fixing method. Due to the continuous vibration and impact generated during train operation, the connecting pin jumps up and down in the connecting hole, causing wear and gradually increasing the fit clearance. This can easily cut off the lower cotter pin, causing the connecting pin to fall out and resulting in the connection between the connecting rod and the switch rail being lost, which seriously affects the reliability of the turnout and the safety of train operation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a turnout switch rail connecting rod anti-detachment connecting pin, which solves the problem that when using a single connecting pin in conjunction with a cotter pin for fixing, the connecting pin moves up and down inside the hole, easily cutting off the lower cotter pin.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a switch rail connecting rod anti-detachment connecting pin, comprising a switch rail body, a fixing seat mounted on the outer wall of the switch rail body, a connecting rod body disposed on the outer side of the fixing seat, a pin body disposed inside both the fixing seat and the connecting rod body, a boss fixedly connected to the upper side of the pin body, a bushing installed inside the pin body, a steel wire rope wound inside the bushing and the boss, an anti-slip pad mounted on the lower surface of the boss, the lower surface of the anti-slip pad disposed on the upper surface of the connecting rod body, a disc spring disposed inside the anti-slip pad, one end of the disc spring disposed on the lower surface of the boss, the other end of the disc spring disposed on the upper surface of the connecting rod body, a screw threadedly connected inside the boss, a limit ring disposed between the screw and the boss, and a moving mechanism disposed inside the boss.

[0006] The above solution achieves the assembly of the fixed seat and the connecting rod body through the cooperation of the pin and the boss. Both the pin and the boss have grooves inside. A bushing is installed in the groove of the pin to avoid direct friction and wear between the wire rope and the pin, thus extending the service life of the components. The wire rope is wound around the inside of the bushing and the groove of the boss. After the wire rope is wound, it wraps around the fixed seat and the connecting rod body, forming a double fixing structure. This double fixing structure eliminates the risk of the pin coming out. Even if the pin breaks, the connection can be maintained by the wire rope, and the switch rail will not lose connection, ensuring the safety of train operation.

[0007] Preferably, the moving mechanism includes a support frame, the outer wall of the support frame is installed inside the boss, a wheel is rotatably connected to the outer wall of the support frame, a transmission rod is provided on the inner wall of the wheel, and fixed plates are installed at both ends of the transmission rod.

[0008] Preferably, a connecting block is installed on the outer wall of the fixing plate, a limit rod is slidably connected inside the connecting block, the top end of the limit rod is installed inside the boss, and a pressing frame is installed on the lower surface of the connecting block, with the lower side of the pressing frame located above the wire rope.

[0009] Preferably, a movable block is slidably connected inside the connecting block, the movable block is located outside the rotating wheel, and a slide rod is slidably connected inside the movable block.

[0010] Preferably, a support plate is fixedly connected to the top end of the slide rod, the outer wall of the support plate is installed on the outer wall of the connecting block, and a disc is fixedly connected to the bottom end of the slide rod.

[0011] Preferably, one end of a spring is fixedly connected to the lower surface of the support plate, and the other end of the spring is fixedly connected to the upper surface of the movable block.

[0012] Preferably, a fixing block is installed on the outer wall of the boss, a rotating rod is rotatably connected inside the fixing block, and a hollow block is fixedly connected to the outer wall of the rotating rod.

[0013] Preferably, a second sliding rod is installed inside the hollow block, and a movable rod is slidably connected to the outer wall of the second sliding rod, with the outer wall of the movable rod slidably connected to the inside of the hollow block.

[0014] Preferably, the movable rod is located outside the wire rope, and one end of the second spring is fixedly connected to the outer wall of the movable rod, while the other end of the second spring is fixedly connected to the inside of the hollow block.

[0015] Preferably, one end of the torsion spring is fixedly connected to the outer wall of the rotating rod, and the other end of the torsion spring is fixedly connected to the inside of the fixing block.

[0016] Working principle: A pin passes through the fixed seat and the connecting rod body to achieve a rigid connection between the switch rail body and the connecting rod body. Anti-slip pads increase friction to prevent the pin from rotating, thereby allowing the boss to axially limit the pin. A steel wire rope passes through the boss and bushing to form a double fixing structure, eliminating the risk of the pin coming out. A screw and a limiting ring are used to lock the steel wire rope after it is wound. When the steel wire rope moves outward, the moving mechanism presses it to form a limit, preventing the steel wire rope from loosening due to external force.

[0017] This invention provides a turnout switch rail connecting rod anti-detachment connecting pin. It has the following beneficial effects: 1. This invention uses the cooperation of pin, boss, bushing, wire rope, anti-slip pad, disc spring and screw to double fix the assembly of the fixed seat and connecting rod body, eliminating the risk of pin coming out. Even if the pin breaks, the connection can be maintained by the wire rope, the switch rail will not be disconnected, and the driving safety is guaranteed. At the same time, the inspection does not require bending over. The condition can be judged by observing the integrity of the wire rope, reducing the personal risk of inspection.

[0018] 2. In this invention, when the fixed seat and connecting rod body experience a slight misalignment, the steel wire rope becomes taut outwards, causing the rotating wheel to rotate. As the rotating wheel rotates, it pushes the transmission rod, fixed plate, connecting block, and pressing frame downwards. The pressing frame presses down on the steel wire rope, mechanically locking it. This self-locking mechanism exhibits an adaptive force that increases as the rope moves outwards, preventing the steel wire rope from loosening or slipping. This ensures that the connecting pin remains reliably anti-detached under vibration and misalignment conditions, significantly improving the stability of the turnout switch rail connection.

[0019] 3. This invention uses a suitable number of transmission rods and fixed plates to accommodate the downward movement of connecting blocks and pressing frames. When the connecting blocks move upward, the rotation of the rotating wheel is accommodated by the cooperation of the moving block, slide rod one, disc, support plate and spring one. This ensures that when assembling the wire rope, the rotation of the rotating wheel will not cause the connecting blocks to move upward and press against the boss, avoiding rigid contact with the inside of the boss, reducing component wear, and improving the practicality of the moving mechanism.

[0020] 4. The present invention limits the outer side of the wire rope by cooperating with the rotating rod, the fixed block, the hollow block, the second sliding rod, the moving rod, the second spring and the torsion spring, and effectively absorbs the radial tension of the wire rope when the wire rope is taut outward, so as to prevent the wire rope from being pulled off or deviating. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a partial structural diagram of the fixing base of the present invention; Figure 3 This is a schematic diagram of a partial structure of the bushing of the present invention; Figure 4 This is a partial structural diagram of the anti-slip mat of the present invention; Figure 5 This is a partial structural diagram of the wire rope of the present invention; Figure 6 This is a cross-sectional view of the internal structure of the boss in this invention; Figure 7 This is a partial structural diagram of the transmission rod of the present invention; Figure 8 This is a partial structural diagram of the movable block of the present invention; Figure 9 This is a cross-sectional schematic diagram of the internal structure of the hollow block of the present invention; Figure 10 This is a partial structural diagram of the rotating rod of the present invention.

[0022] The components are as follows: 1. Switch rail body; 2. Fixed seat; 3. Connecting rod body; 4. Pin; 5. Boss; 6. Bushing; 7. Steel wire rope; 8. Anti-slip pad; 9. Disc spring; 10. Screw; 11. Limiting ring; 12. Moving mechanism; 121. Support frame; 122. Rotating wheel; 123. Transmission rod; 124. Fixed plate; 125. Connecting block; 126. Limiting rod; 127. Pressing frame; 13. Moving block; 14. Slide rod one; 15. Disc; 16. Support plate; 17. Spring one; 18. Fixed block; 19. Rotating rod; 20. Hollow block; 21. Slide rod two; 22. Moving rod; 23. Spring two; 24. Torsion spring. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Please see the appendix Figure 1 - Appendix Figure 5This invention provides a switch rail connecting rod anti-detachment connecting pin, including a switch rail body 1, a fixing seat 2 installed on the outer wall of the switch rail body 1, a connecting rod body 3 arranged on the outer side of the fixing seat 2, a pin 4 arranged inside both the fixing seat 2 and the connecting rod body 3, a boss 5 fixedly connected to the upper side of the pin 4, a bushing 6 installed inside the pin 4, a steel wire rope 7 wound inside the bushing 6 and the boss 5, an anti-slip pad 8 installed on the lower surface of the boss 5, the lower surface of the anti-slip pad 8 being set on the upper surface of the connecting rod body 3, a disc spring 9 arranged inside the anti-slip pad 8, one end of the disc spring 9 being installed on the lower surface of the boss 5, the other end of the disc spring 9 being set on the upper surface of the connecting rod body 3, a screw 10 threadedly connected inside the boss 5, a limit ring 11 being provided between the screw 10 and the boss 5, and a moving mechanism 12 being provided inside the boss 5.

[0025] Specifically, the pin 4 is a one-piece molded component, symmetrically arranged with the switch rail body 1 and the fixed seat 2. The fixed seats 2 on both sides are connected by the connecting rod body 3. The pin 4, the boss 5 and their connecting parts are set at the cotter pins of the fixed seat 2 and the connecting rod body 3 to realize the assembly of the fixed seat 2 and the connecting rod body 3. The steel wire rope 7 passes through the interior of the pin 4 and the boss 5 and is wrapped around the outside of the fixed seat 2 and the connecting rod body 3 for binding and reinforcement, forming a double fixing structure to eliminate the risk of the pin 4 coming off. At the same time, the wrapped steel wire rope 7 makes it easy for workers to observe the condition of the pin 4 and the boss 5. During inspection, there is no need to bend over. The condition of the pin 4 and the boss 5 can be judged by observing the integrity of the steel wire rope 7, avoiding the risk of personal injury. When the steel wire rope 7 is taut outward, with the slight movement of the steel wire rope 7, the pressing part in the moving mechanism 12 applies a clamping force to the steel wire rope 7 to reduce the loosening of the steel wire rope 7.

[0026] Please see the appendix Figure 5 - Appendix Figure 7 The moving mechanism 12 includes a support frame 121. The outer wall of the support frame 121 is installed inside the boss 5. A rotating wheel 122 is rotatably connected to the outer wall of the support frame 121. A transmission rod 123 is provided on the inner wall of the rotating wheel 122. Fixed plates 124 are installed at both ends of the transmission rod 123.

[0027] Specifically, the support frame 121 consists of short rods on both sides and a rotating shaft. The rotating shaft powers the rotating wheel 122 to rotate. The rotating wheel 122 has multiple grooves inside, which allow the moving rod 22 to slide into the grooves and move up and down under the thrust generated by the rotation of the rotating wheel 122, thereby transmitting power to the fixed plate 124 and its connecting structure. The contact between the rotating wheel 122 and the rope is designed with appropriate friction so that the rope drives the rotating wheel 122 to rotate.

[0028] Please see the appendix Figure 5 - Appendix Figure 7 A connecting block 125 is installed on the outer wall of the fixing plate 124. A limit rod 126 is slidably connected inside the connecting block 125. The top of the limit rod 126 is installed inside the boss 5. A pressing frame 127 is installed on the lower surface of the connecting block 125. The lower side of the pressing frame 127 is located on the upper side of the wire rope 7.

[0029] Specifically, the limiting rod 126 is fixed inside the boss 5 to limit the up and down movement of the connecting block 125. The pressing frame 127 is located on the lower side of the connecting block 125 and close to the wire rope 7. When the pressing frame 127 is subjected to external force and moves downward, it presses the wire rope 7 to achieve mechanical locking of the wire rope 7.

[0030] Please see the appendix Figure 7 - Appendix Figure 8 A movable block 13 is slidably connected inside the connecting block 125. The movable block 13 is located outside the rotating wheel 122. A slide rod 14 is slidably connected inside the movable block 13. A support plate 16 is fixedly connected to the top of the slide rod 14. The outer wall of the support plate 16 is installed on the outer wall of the connecting block 125. A disc 15 is fixedly connected to the bottom of the slide rod 14. One end of a spring 17 is fixedly connected to the lower surface of the support plate 16. The other end of the spring 17 is fixedly connected to the upper surface of the movable block 13.

[0031] Specifically, a slider is provided on the side of the movable block 13 near the connecting block 125, which slides inside the connecting block 125 to assist in limiting the up and down movement of the movable block 13. The slider 14 limits the offset of the movement of the movable block 13. The distance between the support plate 16 and the disc 15 limits the range of movement of the movable block 13. The inside of the rotating wheel 122 has multiple grooves for the movable block 13 to slide into the grooves. As the rotating wheel 122 rotates, it pushes the movable block 13 to move up and down. The spring 17 provides a reset for the movable block 13 when it separates from the rotating wheel 122 so that it can be driven by subsequent rotation.

[0032] Please see the appendix Figure 5 - Appendix Figure 9 A fixing block 18 is installed on the outer wall of the boss 5. A rotating rod 19 is rotatably connected inside the fixing block 18. A hollow block 20 is fixedly connected to the outer wall of the rotating rod 19. A sliding rod 21 is installed inside the hollow block 20. A moving rod 22 is slidably connected to the outer wall of the sliding rod 21. The outer wall of the moving rod 22 is slidably connected inside the hollow block 20. The moving rod 22 is located outside the wire rope 7. One end of a spring 23 is fixedly connected to the outer wall of the moving rod 22. The other end of the spring 23 is fixedly connected to the inside of the hollow block 20.

[0033] Specifically, two fixing blocks 18 are provided and arranged symmetrically to facilitate the support and limit of the rotation of the rotating rod 19. The fixing blocks 18 and their connecting structures are provided on both sides of the boss 5 and arranged symmetrically to facilitate the limit of the ropes on both sides. The hollow block 20 restricts the movement of the moving rod 22, while the sliding rod 21 prevents the moving rod 22 from falling off. The elastic force of the spring 23 absorbs the external force on the moving rod 22 and also facilitates the reset of the moving rod 22.

[0034] Please see the appendix Figure 10 One end of a torsion spring 24 is fixedly connected to the outer wall of the rotating rod 19, and the other end of the torsion spring 24 is fixedly connected to the inside of the fixing block 18.

[0035] Specifically, the torsional force of the torsion spring 24 provides an elastic restoring force to the rotating rod 19, and the rotating rod 19 adaptively rotates when the rope is taut outward.

[0036] Workflow: First, align the cotter pins inside the fixing seat 2 and the connecting rod body 3, so that the pin 4 is inserted into the interior of the fixing seat 2 and the connecting rod body 3. When the anti-slip pad 8 on the lower side of the boss 5 contacts the upper surface of the connecting rod body 3, it indicates that the pin 4 and the boss 5 are installed in place, realizing the assembly between the fixing seat 2 and the connecting rod body 3. Through the bushing 6 inside the pin 4 and the groove inside the boss 5, the steel wire rope 7 is wound to wrap the fixing seat 2 and the connecting rod body 3, binding and reinforcing them in a wrapped shape, forming a double fixing structure. Even if the pin 4 breaks, the connection can be maintained by the steel wire rope 7. After the steel wire rope 7 is wound, after the starting end and the end of the steel wire rope 7 make excessive contact, the winding of the steel wire rope 7 is fixed by the screw 10. The limiting ring 11 prevents the screw 10 from rotating due to the force transmitted by the boss 5. The anti-slip pad 8 prevents the pin 4 and the boss 5 from rotating due to external force, reducing the wear and loosening caused by the rotation of the pin 4.

[0037] When a train passes over the upper side of the switch rail body 1, the resulting vibration is transmitted between the fixed seat 2 and the connecting rod body 3. When the fixed seat 2 and the connecting rod body 3 are subjected to external force and undergo slight displacement, the wire rope 7 is internally supported. Since the wire rope 7 is under appropriate tension when it is wound, when the wire rope 7 is taut and moves slightly outward, the contact between the rotating wheel 122 and the wire rope 7 causes the rotating wheel 122 to rotate. The rotation of the rotating wheel 122 transmits power to the transmission rod 123. The connecting block 125 moves downward under the limit of the limiting rod 126 through the fixed plate 124, and the pressing frame 127 moves synchronously with the connecting block 125, so that the pressing frame 127 presses down on the wire rope 7, realizing the mechanical locking of the wire rope 7 when it moves outward, so as to ensure the stability of the wire rope 7.

[0038] During assembly, the wire rope 7 causes the wheel 122 to rotate in the opposite direction, which drives the fixed plate 124 and connecting block 125 to move upward via the transmission rod 123. Since the transmission rod 123 and fixed plate 124 are set in appropriate quantities, after the connecting block 125 moves to the appropriate position, the moving block 13 contacts the wheel 122, causing the moving block 13 to move on the outer wall of the slide rod 14. The support plate 16 and disc 15 limit the range of movement of the moving block 13. When the moving block 13 is pushed upward by the outer wall of the wheel 122, the spring 17 causes the moving block 13 to automatically return to its original position after it moves upward and separates from the wheel 122, so as to adapt to the rotation of the wheel 122 and avoid excessive upward movement of the connecting block 125 and wear on the inner wall of the boss 5.

[0039] Because the wire rope 7 is under appropriate tension during winding, the moving rod 22 contacts the wire rope 7, initially limiting its movement. When the wire rope 7 is taut outward, it pushes the moving rod 22 outward. The sliding rod 21 limits the movement of the moving rod 22, while the spring 23 provides support for the moving rod 22, thus absorbing the tension when the wire rope 7 is taut outward. At the same time, the outward tension of the wire rope 7 is not linear, causing the moving rod 22 and the hollow block 20 to rotate inside the fixed block 18 under external force via the rotating rod 19. The torsion spring 24 supports the rotation of the rotating rod 19, not only absorbing the force when the moving rod 22, the hollow block 20, and the rotating rod 19 rotate, but also used for the reset of the rotating rod 19 and its connecting structure.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A turnout point blade connecting rod anti-drop connecting pin, comprising a point blade body (1), characterized in that: A fixing seat (2) is installed on the outer wall of the switch rail body (1). A connecting rod body (3) is provided on the outer side of the fixing seat (2). A pin (4) is provided inside both the fixing seat (2) and the connecting rod body (3). A boss (5) is fixedly connected to the upper side of the pin (4). A bushing (6) is installed inside the pin (4). A wire rope (7) is wound inside the bushing (6) and the boss (5). An anti-slip pad (8) is installed on the lower surface of the boss (5). The lower surface of the anti-slip pad (8) is set on the upper surface of the connecting rod body (3). A disc spring (9) is set on the inner side of the anti-slip pad (8). One end of the disc spring (9) is installed on the lower surface of the boss (5). The other end of the disc spring (9) is set on the upper surface of the connecting rod body (3). A screw (10) is threaded inside the boss (5). A limit ring (11) is set between the screw (10) and the boss (5). A moving mechanism (12) is set inside the boss (5).

2. The anti-detachment connecting pin for a turnout switch rail connecting rod according to claim 1, characterized in that: The moving mechanism (12) includes a support frame (121), the outer wall of the support frame (121) is installed inside the boss (5), the outer wall of the support frame (121) is rotatably connected to a wheel (122), the inner wall of the wheel (122) is provided with a transmission rod (123), and both ends of the transmission rod (123) are equipped with fixing plates (124).

3. The anti-detachment connecting pin for a turnout switch rail connecting rod according to claim 2, characterized in that: A connecting block (125) is installed on the outer wall of the fixing plate (124). A limiting rod (126) is slidably connected inside the connecting block (125). The top of the limiting rod (126) is installed inside the boss (5). A pressing frame (127) is installed on the lower surface of the connecting block (125). The lower side of the pressing frame (127) is located on the upper side of the wire rope (7).

4. The anti-detachment connecting pin for a turnout switch rail connecting rod according to claim 3, characterized in that: The connecting block (125) is slidably connected to a moving block (13), which is located outside the rotating wheel (122). The moving block (13) is slidably connected to a slide rod (14).

5. The anti-detachment connecting pin for a turnout switch rail connecting rod according to claim 4, characterized in that: The top end of the slide rod (14) is fixedly connected to a support plate (16), the outer wall of the support plate (16) is installed on the outer wall of the connecting block (125), and the bottom end of the slide rod (14) is fixedly connected to a disc (15).

6. The anti-detachment connecting pin for a turnout switch rail connecting rod according to claim 5, characterized in that: One end of a spring (17) is fixedly connected to the lower surface of the support plate (16), and the other end of the spring (17) is fixedly connected to the upper surface of the moving block (13).

7. The anti-detachment connecting pin for a turnout switch rail connecting rod according to claim 1, characterized in that: A fixing block (18) is installed on the outer wall of the boss (5), and a rotating rod (19) is rotatably connected inside the fixing block (18). A hollow block (20) is fixedly connected to the outer wall of the rotating rod (19).

8. The anti-detachment connecting pin for a turnout switch rail connecting rod according to claim 7, characterized in that: The hollow block (20) is equipped with a slide rod two (21), and the outer wall of the slide rod two (21) is slidably connected to a moving rod (22), and the outer wall of the moving rod (22) is slidably connected to the inside of the hollow block (20).

9. A turnout switch rail connecting rod anti-detachment connecting pin according to claim 8, characterized in that: The movable rod (22) is located outside the wire rope (7). One end of the second spring (23) is fixedly connected to the outer wall of the movable rod (22), and the other end of the second spring (23) is fixedly connected to the inside of the hollow block (20).

10. A turnout switch rail connecting rod anti-detachment connecting pin according to claim 7, characterized in that: One end of a torsion spring (24) is fixedly connected to the outer wall of the rotating rod (19), and the other end of the torsion spring (24) is fixedly connected to the inside of the fixing block (18).

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