A locking mechanism for a switch machine

Abstract

The present invention discloses a locking mechanism for a switch machine, which belongs to the technical field of switch machines and includes a locking body which is sleeved on an actuating rod and connected to the actuating rod through an extrusion cutting and extrusion stripping component, a locking hook which is arranged on the inner wall of the switch machine casing and can realize a locking action with the locking body; an insertion hole for inserting the locking hook is horizontally arranged in the locking body along the movement direction of the actuating rod, a through hole for penetrating a toggle plate is arranged on the locking body, the insertion hole and the through hole are connected by a connecting hole, a locking roller which can move up and down in the connecting hole is arranged in the connecting hole, a stopper for limiting the locking roller is arranged in the locking body above the locking roller, and a groove which matches the locking roller is provided at the front end of the locking hook. The present invention ensures the effective and reliable locking action of the actuating rod, improves the stability and reliability of the equipment, can protect the extrusion cutting, avoid abnormal breakage, and has a break indication function.

Description

Technical Field

[0001] The present invention belongs to the technical field of switch machines, and in particular relates to a locking mechanism for switch machines. Background Art

[0002] A switch is an important signal infrastructure device used to reliably change the position of a turnout, change the direction of turnout opening, lock the turnout point rail, and reflect the position of the turnout. It can effectively ensure driving safety, improve transportation efficiency, and reduce the labor intensity of drivers. The locking mechanism installed on the operating rod in the switch is used to ensure that the operating rod is locked in position when it moves to the two end positions. However, the existing locking mechanism cannot guarantee the effective and reliable locking of the operating rod at the two end positions. A shearing pin is provided between the existing locking mechanism and the operating rod to protect the switch from damage when the turnout is squeezed or the instantaneous impact force is too large. The shearing pin is a device with a constant shearing force, is safe and reliable, and has the simplest structure and process. However, during the use of the switch, the shearing pin is directly subjected to force, which causes vibration when the train wheels pass through. The shearing pin is in a state of vibration and wear for a long time, and is very prone to abnormal fracture, which makes it impossible to ensure the normal operation of the switch. Summary of the Invention

[0003] In response to the problems existing in the prior art, the present invention provides a locking mechanism for a switch machine, which ensures the effectiveness and reliability of the locking action of the operating rod, improves the stability and reliability of the equipment; can protect the extrusion cutting, avoid abnormal fracture, and has a fracture indication function.

[0004] The present invention is achieved by providing a locking mechanism for a switch machine, comprising a locking body sleeved on an operating rod and connected to the operating rod via an extrusion cutting and extrusion stripping assembly, a lock hook disposed on the inner wall of the switch machine housing and capable of achieving a locking action with the locking body;

[0005] An insertion hole for inserting a lock hook is horizontally provided in the locking body along the movement direction of the action rod, a through hole for the toggle plate to pass through is provided on the locking body, the insertion hole and the through hole are connected by a connecting hole, a locking roller that can move up and down in the connecting hole is provided in the connecting hole, a block for limiting the locking roller is provided above the locking roller in the locking body, and a groove matching the locking roller is provided at the front end of the lock hook.

[0006] Furthermore, an extrusion assembly is provided at both ends of the locking body near one side of the contact group, an insert is embedded in the action rod at a position opposite to the extrusion assembly, a clamping groove is provided on the insert, and the extrusion assembly includes an elastic member, a clamping column and a steering block arranged by rotating the steering pin arranged in the locking body, one end of the steering block is against the elastic member, and the other end pushes the clamping column to fit tightly into the clamping groove.

[0007] Furthermore, the locking body is provided with a break indication component on one side close to the contact group, and the break indication component includes a break indication push rod vertically arranged in the locking body, a through hole is axially opened on the break indication push rod, a first rotating wheel is arranged in the through hole by rotating through a rotating shaft, a horizontal push rod is horizontally arranged in the locking body, a trapezoidal groove is provided on the insert in the action rod, a second rotating wheel is arranged at one end of the horizontal push rod by rotating through a rotating shaft, the second rotating wheel is tangent to the contact surface of the trapezoidal groove, the other end of the horizontal push rod is arranged in the through hole, and a contact inclined surface tangent to the first rotating wheel is provided, and a spring is sleeved on the break indication push rod, and the upper end of the spring is connected to the lower surface of the horizontal push rod.

[0008] Furthermore, one end of the block is rotatably arranged in the locking body through a rotating shaft, and the other end extends into the insertion hole and can be against the locking roller; a torsion spring for resetting the block is provided on the block, and the two ends of the torsion spring are respectively arranged on the locking body and the block.

[0009] Furthermore, the contact surface between the locking hook and the insertion hole is provided with a wear-resistant sheet, which effectively reduces the wear between the locking hook and the insertion hole.

[0010] Furthermore, two locking hooks are provided, and the two locking hooks are relatively arranged on both sides of the inner wall of the switch machine box along the movement direction of the actuating rod.

[0011] Furthermore, the steering block is a fan-shaped structure.

[0012] The advantages and technical effects of the present invention are as follows: due to the adoption of the above technical solution, the locking action of the action rod is guaranteed to be effective and reliable, and the stability and reliability of the equipment are improved; it can protect the extrusion cutting and avoid abnormal fracture, and has a fracture indication function.

[0013] The provided lock hook, lock body and internal components can ensure that the action rod can be locked at both ends; the provided stopper and torsion spring can ensure that when the lock body enters the locked position, the stopper rotates under the push of the lock hook, and the locking roller is lifted by the toggle plate and engaged in the groove of the lock hook to achieve the locking action; when the unlocking action is performed, the toggle plate is separated from the locked position, the locking roller falls freely, the lock hook groove is disengaged from the locking roller, the lock body moves out of the locked position, and the torsion spring causes the stopper to return to its original position and continue to limit the locking roller to complete the unlocking action; this structure is simple and light, can ensure effective rotation and limiting during the action process, avoids jamming and clogging, and improves stability;

[0014] During the force transmission process, the locking body is effectively connected with the push plate sleeve and the toggle plate in the power system. The torque is short, the locking is effective and reliable, and all the component forces are decomposed by the inside of the locking body and have nothing to do with the outside world. There is no direct friction of ferrous metal during the force transmission and locking process, which not only reduces friction resistance but also ensures that there is no need for maintenance.

[0015] The extrusion assembly provided protects the extrusion pin without the need for additional protective devices. The extrusion assembly provided on the locking body can avoid the need to process and install the extrusion device on the actuating rod, effectively improving the strength of the actuating rod and ensuring the working stability and reliability of the actuating rod and the equipment. The elastic member, steering block and clamping column provided in the extrusion assembly, one end of the elastic member is limited and adjusted by a screw plug, and the clamping column is pushed by the elastic member and the steering block so that the clamping column is tightly attached to the clamping groove of the insert in the actuating rod, which effectively connects the locking body and the actuating rod and smoothly completes the normal turnout switching action; the disc spring device is provided in the extrusion assembly, which can fully absorb the impact force when the wheel passes, avoid damage caused by long-term vibration, and ensure reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of the overall structure of a switch machine provided by an embodiment of the present invention;

[0017] Figure 2 1 is a schematic structural diagram of a locking mechanism provided by an embodiment of the present invention;

[0018] Figure 3 is a cross-sectional view of a locking mechanism provided by an embodiment of the present invention;

[0019] Figure 4 Schematic diagram of the action rod structure provided by an embodiment of the present invention;

[0020] Figure 5 Schematic diagram of the lock hook structure provided by an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the connection between the extrusion assembly, the break indication assembly and the action rod provided in an embodiment of the present invention;

[0022] Figure 7 is a cross-sectional view of a component provided by an embodiment of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the toggle plate provided in an embodiment of the present invention.

[0024] In the figure, 1. actuating rod; 2. locking body; 2-1. insertion hole; 2-2. communicating hole; 2-3. through hole; 3. locking hook; 3-1. groove; 3-2. wear-resistant sheet; 4. extrusion cutting; 5. extrusion assembly; 5-1. elastic member; 5-2. steering block; 5-3. clamping column; 6. break indicating assembly; 6-1. break indicating push rod; 6-2. through hole; 6-3. first rotating wheel; 6-4. horizontal push rod; 6-5. second rotating wheel; 6-6. contact inclined surface; 6-7 spring; 7. block; 8. locking roller; 9. insert; 9-1. clamping groove; 9-2. trapezoidal groove; 10. toggle plate; 10-1. connecting part; 10-2. through part; 10-3. toggle part; 10-4. toggle head; 10-5. trapezoidal support plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] like Figures 1 to 8 As shown, the present application provides a locking mechanism for a switch machine, comprising a locking body 2 sleeved on an operating rod 1 and connected to the operating rod 1 via an extrusion cutter 4 and an extrusion assembly 5, and a lock hook 3 disposed on the inner wall of the switch machine housing and capable of achieving a locking action with the locking body 2;

[0027] The locking body 2 has an insertion hole 2-1, horizontally disposed along the direction of movement of the actuating rod 1, for inserting the locking hook 3. The locking body 2 also has a through hole 2-3, through which the toggle plate 10 passes. The insertion hole 2-1 and through hole 2-3 are connected by a connecting hole 2-2. A locking roller 8 is disposed within the connecting hole 2-2, which is movable up and down within the connecting hole 2-2. A stopper 7 is disposed above the locking roller 8 within the locking body 2 to limit the locking roller 8. One end of the stopper 7 is pivotally mounted within the locking body 2 via a rotating shaft, while the other end extends into the insertion hole 2-1 and abuts against the locking roller 8. A torsion spring is provided on the stopper 7 for resetting the stopper 7. The ends of the torsion spring are disposed on the locking body 2 and the stopper 7, respectively. A groove 3-1 is disposed at the front end of the locking hook 3, which mates with the locking roller 8. The contact surface between the locking hook 3 and the insertion hole 2-1 is provided with a wear-resistant sheet 3-2, which can be made of wear-resistant copper. Two locking hooks 3 are provided, positioned opposite each other on the inner wall of the switch housing along the direction of movement of the operating rod 1. Two locking rollers 8 are also provided, one at each end of the through hole 2-3. When the operating rod is locked at either end, the two locking rollers 8 engage with the two locking hooks 3, respectively.

[0028] The locking body 2 is provided with an extrusion assembly 5 at both ends, near the contact assembly. An insert 9 is embedded within the actuating rod 1, opposite the extrusion assembly 5. The insert 9 is provided with a snap-in slot 9-1. The extrusion assembly 5 comprises an elastic member 5-1 disposed within the locking body 2, a snap-in post 5-3, and a steering block 5-2 pivoted by a steering pin. One end of the steering block 5-2 abuts against the elastic member 5-1, while the other end pushes the snap-in post 5-2 into engagement with the snap-in slot 9-1. The elastic member 5-1 is a disc spring. Two sets of extrusion assemblies 5 are provided, symmetrically positioned on either side of the break indicator assembly 6.

[0029] A break indication component 6 is provided on the side of the locking body close to the contact group, and the break indication component 6 includes a break indication push rod 6-1 vertically arranged in the locking body 2, and a through hole 6-2 is axially opened on the break indication push rod 6-1, and a first rotating wheel 6-3 is arranged in the through hole 6-2 through a rotating shaft, and a horizontal push rod 6-4 is horizontally arranged in the locking body 2. A trapezoidal groove 9-2 is provided on the insert 9 in the action rod 1, and a second rotating wheel 6-5 is arranged at one end of the horizontal push rod 6-4 through a rotating shaft, and the second rotating wheel 6-5 is tangent to the contact surface of the trapezoidal groove 9-2, and the other end of the horizontal push rod 6-4 is arranged in the through hole 6-2 and is provided with a contact inclined surface 6-6 tangent to the first rotating wheel 6-3. A spring 6-7 is sleeved on the break indication push rod 6-1, and the upper end of the spring 6-7 is connected to the lower surface of the horizontal push rod 6-4.

[0030] like Figure 8 As shown, the toggle plate 10 includes a connecting portion 10-1 for connecting to the push plate sleeve, a through portion 10-2 that penetrates the locking body, and a toggle portion 10-3 of the toggle contact assembly. The cross-section of the through portion 10-2 is a trapezoidal structure. A trapezoidal support plate 10-5 and a toggle head 10-4 are provided on the toggle portion 10-3. The trapezoidal support plate 10-5 and the through portion 10-2 are arranged perpendicular to each other, and the toggle head 10-4 is horizontally arranged on the side of the trapezoidal support plate 10-5 close to the contact assembly.

[0031] During operation, the power system of the switch machine drives the toggle plate 10 to move, and the toggle plate 10 drives the locking body 2 and the action rod 1 to move through the through hole 2-3. When the movement gradually approaches the two end positions, the lock hook 3 is inserted into the insertion hole 2-1 of the locking body 2, pushing the stopper 7, and the stopper 7 rotates to cancel the limit on the locking roller 8. At the same time, the through portion 10-2 of the toggle plate 10 moves to the end position of the through hole 2-3. Since the cross section of the through portion 10-2 is a trapezoid, the inclined surface of the side wall of the through portion 10-2 gradually increases. Lift the locking roller 8 upwards, and when the locking roller 8 is engaged in the groove 3-1 of the lock hook 3, the locking action of the action rod 1 at the end is completed; when it is out of the locked position, the toggle plate moves toward the center position of the through hole 2-3, and the locking roller 8 moves downward along an oblique side of the through portion 10-2, and disengages from the groove 3-1 of the lock hook 3, and the lock hook 3 disengages from the insertion hole 2-1. Under the action of the torsion spring, the block 7 is reset to continue to limit the locking roller 8, completing the unlocking action of the action rod 1 at the end.

[0032] The shear pin has a certain gap when in use and is in a stress-free state to ensure the stability of the shear force. During normal operation, the shear assembly is responsible for the connection and force bearing work. Specifically, one end of the elastic member 5-1 is limited and adjusted by a screw plug. Under the push of the elastic member 5-1 and the steering block 5-2, the clamping column 5-3 is tightly attached to the clamping groove 9-1 of the inner insert 9 of the operating rod 1, which can effectively connect the locking body 2 and the operating rod 1 and smoothly complete the normal turnout switching operation. When the shear force exceeds 12-15KN, the shear assembly is disengaged and the shear pin is responsible for the force bearing work. Specifically, when subjected to a shearing force greater than 12-15 kN, the clamping column 5-2, which was originally tightly attached to the clamping groove 9-1, disengages from the clamping groove 9-1 and pushes the steering block 5-2 to rotate and compress the elastic member 5-1. When the switch is squeezed or the instantaneous impact force is too large, the shearing pin 4 is cut off, and the locking body 2 is separated from the operating rod 1, thereby protecting the switch from damage. At this time, the second runner 6-5 in the horizontal push rod 6-4 moves along the trapezoidal groove 9-2 and disengages from the trapezoidal groove 9-2. The horizontal push rod 6-4 moves forward, and the first runner 6-3 moves upward along the contact slope 6-6 on the horizontal push rod 6-4, causing the break indication push rod 6-1 to be ejected. The ejection of the break indication push rod 6-1 lifts the lifting position on the dynamic contact bracket, triggering the conversion between the dynamic and static contacts, and realizing the break indication function.

[0033] The adoption of the above technical solution ensures that the locking action of the action rod is effective and reliable, thereby improving the stability and reliability of the equipment; it can protect the extrusion cutting and avoid abnormal fracture, and has a fracture indication function.

[0034] The provided lock hook, lock body and internal components can ensure that the action rod 1 can be locked at both end positions; the provided stopper 7 and torsion spring can ensure that when the lock body 2 enters the locked position, the stopper 7 rotates under the push of the lock hook 3, and the locking roller 8 is lifted by the toggle plate 10 and engaged in the groove 3-1 of the lock hook 3 to achieve the locking action; and when the lock is out of the locked position, the stopper 7 is reset under the action of the torsion spring to continue to limit the locking roller 8. This structure is simple and light, can ensure effective rotation and limiting during the action, avoids jamming and clogging, and improves stability;

[0035] During the force transmission process, the locking body 2 is effectively and actively connected with the push plate sleeve and the toggle plate in the power system, with short torque, effective and reliable locking, and all component forces are automatically decomposed within the locking body without any connection with the outside world; there is no direct friction of ferrous metal during the force transmission and locking process, which not only reduces frictional resistance but also ensures that there is no need for maintenance.

[0036] The extrusion assembly 5 is provided to protect the extrusion pin 4 without the need for additional protective devices. The extrusion assembly 5 provided on the locking body 2 can avoid processing and installing an extrusion device on the action rod 1, effectively improve the strength of the action rod 1, and ensure the working stability and reliability of the action rod 1 and the equipment. Through the elastic member 5-1, the steering block 5-2 and the clamping column 5-3 provided in the extrusion assembly 5, one end of the elastic member 5-1 is limited and adjusted by a screw plug. Under the push of the elastic member 5-1 and the steering block 5-2, the clamping column 5-3 is tightly attached to the clamping groove 9-1 of the insert 9 in the action rod 2, which can effectively connect the locking body 2 and the action rod 1 and smoothly complete the normal turnout switching action; the disc spring device is provided in the extrusion assembly 5, which can fully absorb the impact force when the wheel passes, avoid damage caused by long-term vibration, and ensure reliable connection.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A locking mechanism for a switch machine, characterized in that: It comprises a locking body (2) which is sleeved on an actuating rod (1) and connected to the actuating rod (1) through an extrusion cutting (4) and an extrusion stripping assembly (5), and a locking hook (3) which is arranged on the inner wall of the switch housing and can realize a locking action with the locking body (2); An insertion hole (2-1) for inserting a lock hook (3) is horizontally provided in the locking body (2) along the movement direction of the action rod (1), a through hole (2-3) for the toggle plate to penetrate is provided on the locking body (2), the insertion hole (2-1) and the through hole (2-3) are connected via a connecting hole (2-2), a locking roller (8) that can move up and down in the connecting hole (2-2) is provided in the connecting hole (2-2), a stopper (7) for limiting the locking roller (8) is provided above the locking roller (8) in the locking body (2), and a groove (3-1) that matches the locking roller (8) is provided at the front end of the lock hook (3); An extrusion assembly (5) is provided at both ends of the locking body (2) near one side of the contact group, an insert (9) is embedded in the action rod (1) at a position relative to the extrusion assembly (5), and a clamping groove (9-1) is provided on the insert (9), and the extrusion assembly (5) comprises an elastic member (5-1) provided in the locking body (2), a clamping column (5-3) and a steering block (5-2) arranged to rotate through a steering pin, one end of the steering block (5-2) abuts against the elastic member (5-1), and the other end pushes the clamping column (5-3) to be closely attached to the clamping groove (9-1); A break indication assembly (6) is provided on one side of the locking body close to the contact group. The break indication assembly (6) comprises a break indication push rod (6-1) vertically arranged in the locking body (2). A through hole (6-2) is axially provided on the break indication push rod (6-1). A first rotating wheel (6-3) is provided in the through hole (6-2) for rotation via a rotating shaft. A horizontal push rod (6-4) is horizontally provided in the locking body (2). A trapezoidal groove (9-2) is provided on the insert (9) in the action rod (1). One end of the horizontal push rod (6-4) is provided with a second rotating wheel (6-5) rotatably arranged through a rotating shaft, and the second rotating wheel (6-5) is tangent to the contact surface of the trapezoidal groove (9-2). The other end of the horizontal push rod (6-4) is arranged in the through hole (6-2) and is provided with a contact inclined surface (6-6) tangent to the first rotating wheel (6-3). The cross-sectional view push rod (6-1) is provided with a spring (6-7), and the upper end of the spring (6-7) is connected to the lower surface of the horizontal push rod (6-4).

2. The locking mechanism for a switch machine according to claim 1, characterized in that: One end of the stopper (7) is rotatably arranged in the locking body (2) via a rotating shaft, and the other end extends into the insertion hole (2-1) and can abut against the locking roller (8); a torsion spring for resetting the stopper (7) is provided on the stopper (7), and the two ends of the torsion spring are respectively arranged on the locking body (2) and the stopper (7).

3. The locking mechanism for a switch machine according to claim 1, characterized in that: The contact surface between the locking hook (3) and the insertion hole (2-1) is provided with a wear-resistant sheet (3-2).

4. The locking mechanism for a switch machine according to claim 1, characterized in that: Two locking hooks (3) are provided, and the two locking hooks (3) are arranged relatively on both sides of the inner wall of the switch machine box along the movement direction of the actuating rod (1).

5. The locking mechanism for a switch machine according to claim 1, characterized in that: The elastic member (5-1) is a disc spring.

6. The locking mechanism for a switch machine according to claim 1, characterized in that: The steering block (5-2) is a fan-shaped structure.

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