A belt pull cord switch convenient for maintenance

Abstract

The present invention relates to the field of belt conveying, and particularly to a belt pull cord switch that is convenient for maintenance. Technical problem: Once a fault occurs in the existing pull cord switch, it will cause the entire belt to stop running. The technical solution of the present invention is: A belt pull cord switch that is convenient for maintenance, comprising a switch body, a pull cord body, a fixing ring, a fault prevention system, and a clamping system; A pull cord body is provided on each side of the switch body; A fixing ring is provided on each side of the switch body, and the fixing ring is located on the pull cord body; The switch body is connected to a fault prevention system, and the fault prevention system is connected to the pull cord body; The switch body is connected to a clamping system, and the clamping system is located outside the fault prevention system. Through the limiting action of the spring rod and the limiting rod, the present invention prevents the cylindrical part from rotating when a fault occurs in the switch body, thereby controlling the belt to stop running, and further avoiding the situation that once a fault occurs in the existing switch body, it will cause the entire belt to stop running and affect production.

Description

Technical Field

[0001] The present invention relates to the field of belt conveyors, and particularly to a belt pull cord switch that is convenient for maintenance. Background Art

[0002] At present, generally multiple pull cord switches connected by pull cords are installed on both sides of a belt conveyor. In an emergency, manually pulling any one pull cord on either side will cause one of the pull cord switches to rotate, thereby stopping the belt. However, the existing pull cord switches are provided with safety devices inside. Under normal circumstances, a person needs to exert a little force to pull the pull cord to trigger the switch to avoid accidental contact with the pull cord by a person. When the pull cord switch fails, the safety device will fail, resulting in the pull cord switch being very easy to be triggered, and further causing the entire belt to stop, with a long troubleshooting time and affecting production.

[0003] At the same time, when the pull cord switch needs to be removed for maintenance, the pull cords at both ends of the pull cord switch need to be untied first to make the originally taut pull cords loose. When the repaired pull cord switch is installed, the pull cords need to be tightened again to connect to the pull cord switch, thereby the pull cords affect other pull cord switches, resulting in the belt stopping. Summary of the Invention

[0004] In order to overcome the shortcomings that once the existing pull cord switch fails, it will cause the entire belt to stop, and at the same time, when the pull cord switch needs to be removed for maintenance and then reinstalled, the pull cords will affect other pull cord switches, resulting in the belt stopping, the present invention provides a belt pull cord switch that is convenient for maintenance.

[0005] The technical solution is: a belt pull cord switch that is convenient for maintenance, including a switch body, a pull cord body, a fixing ring, a fault prevention system, and a clamping system; the switch body is provided with a cylindrical portion; a reset rod is fixedly connected to the cylindrical portion; two rectangular grooves that are centrosymmetric about the cylindrical portion are formed in the cylindrical portion; two mounting pieces are fixedly connected to the switch body; a pull cord body is provided on each side of the switch body; a fixing ring is provided on each side of the switch body, and the fixing ring is located on the pull cord body; the switch body is connected with a fault prevention system, and the fault prevention system is connected with the pull cord body; the switch body is connected with a clamping system, and the clamping system is located outside the fault prevention system; the fault prevention system is used to prevent the switch body from failing and causing the belt to stop; the clamping system is used to clamp the pull cord body when the switch body needs to be disassembled.

[0006] Further, the fault prevention system consists of two fault prevention components that are centrosymmetric about the cylindrical part; the fault prevention component includes a first fixing plate, a first fixing rod, a rotating disk, a linkage block, a fixing rope, an arc-shaped guide rail, a pulling plate, a first sliding rail, a slider, a U-shaped block, a second fixing rod, a third fixing rod, a first linkage rope, a limiting rod, a second linkage rope, a fixing block, and a spring rod; the switch body is fixedly connected to the first fixing plate; the first fixing plate is fixedly connected to the first fixing rod, and the first fixing rod contacts the pulling rope body; the first fixing plate is rotatably connected to the rotating disk, and a torsion spring is provided between the rotating disk and the first fixing plate; the rotating disk is provided with a V-shaped groove; the rotating disk is provided with a first edge part; the rotating disk is rotatably connected to the linkage block, and a spring is connected between the rotating disk and the linkage block, and the linkage block is located in the V-shaped groove, and the linkage block is fixedly connected to the pulling rope body; the rotating disk is fixedly connected to the fixing rope; the cylindrical part is fixedly connected to the arc-shaped guide rail; the arc-shaped guide rail is slidably connected to the pulling plate, and a spring is connected between the arc-shaped guide rail and the pulling plate, and the pulling plate is fixedly connected to the fixing rope; the pulling plate is fixedly connected to the first sliding rail; the first sliding rail is slidably connected to the slider; the slider is provided with an end part; the cylindrical part is fixedly connected to the U-shaped block; the linkage block is fixedly connected to the second fixing rod; the switch body is fixedly connected to the third fixing rod; the third fixing rod is fixedly connected to two spring rods; the second fixing rod is fixedly connected to the first linkage rope, and the first linkage rope bypasses the third fixing rod and is fixedly connected to the slider; the rectangular groove is slidably connected to the limiting rod, and the limiting rod is fixedly connected to the spring rod; the second fixing rod is fixedly connected to the second linkage rope, and the second linkage rope bypasses the third fixing rod and is fixedly connected to the limiting rod; the cylindrical part is fixedly connected to the fixing block; the fixing block is provided with a second edge part; the limiting rod is used to prevent the belt from stopping due to a fault in the switch body.

[0007] Further, the clamping system consists of two clamping components that are centrosymmetric about the cylindrical part; the clamping component includes a second fixing plate, a second sliding rail, a pushing block, a pull rod, a wedge block, and a clamping plate; the mounting piece is fixedly connected to the second fixing plate; the second fixing plate is fixedly connected to the second sliding rail; the second sliding rail is slidably connected to the pushing block; the pushing block is provided with a pushing part; the pushing block is fixedly connected to the pull rod; the second fixing plate is slidably connected to the clamping plate; the clamping plate is fixedly connected to the wedge block, and the wedge block cooperates with the pushing block; the second fixing plate is fixedly connected to another clamping plate, and the two clamping plates are distributed up and down; each of the two clamping plates is provided with a clamping part; the clamping plate is used to clamp the pulling rope body when the switch body needs to be disassembled.

[0008] Further, the surface of the clamping part is uneven.

[0009] Further, the pushing part is inclined.

[0010] Further, the first edge part is arc-shaped.

[0011] Further, the linkage block is fan-shaped.

[0012] Further, the end part is arc-shaped.

[0013] Furthermore, the cross-section of the limiting rod is triangularly arranged.

[0014] Furthermore, a spring is provided between the first slide rail and the slider.

[0015] The beneficial effects are as follows: Through the limiting effects of the spring rod and the limiting rod in the present invention, and since the force for the cylindrical part to drive the fixed block to rotate is less than the critical value for the spring rod to be compressed, the limiting rod will not be pushed to compress the spring rod. Thus, the fixed block and the cylindrical part cannot rotate under the limiting effect of the limiting rod, thereby preventing the cylindrical part from rotating when the switch body fails, further controlling the belt to stop, and further avoiding the situation that once the existing switch body fails, the entire belt will stop, affecting production.

[0016] In the present invention, by manually pushing the pull rod backward, the pull rod drives the pushing block to move backward in the second slide rail, and the pushing block then pushes the wedge block and the clamping plate upward, so that the two clamping plates are closed, thereby clamping the pull rope body on both sides of the switch body to prevent slack. Then, the pull rope body connected to the linkage block is detached. After the switch body is repaired and reinstalled to its original position, the pull rope body is reconnected to the linkage block. This avoids the need to tighten the pull rope body again when reinstalling the switch body after disassembly and repair, which may cause the pull rope body to affect other switch bodies and lead to belt stoppage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the belt pull rope switch for easy maintenance disclosed in the present invention;

[0018] Figure 2 is a combined structural diagram of the switch body, the pull rope body, the fixed ring and the anti-fault system of the belt pull rope switch for easy maintenance disclosed in the present invention;

[0019] Figure 3 is a combined partial structural diagram of the switch body, the pull rope body and the anti-fault system of the belt pull rope switch for easy maintenance disclosed in the present invention;

[0020] Figure 4 is a combined partial structural diagram of the pull rope body and the anti-fault system of the belt pull rope switch for easy maintenance disclosed in the present invention;

[0021] Figure 5 is a combined partial structural diagram of the switch body and the anti-fault system of the belt pull rope switch for easy maintenance disclosed in the present invention;

[0022] Figure 6 is a combined partial structural diagram of the pull rope body and the clamping system of the belt pull rope switch for easy maintenance disclosed in the present invention.

[0023] Reference numerals: 1 - switch body, 2 - pull rope body, 3 - fixing ring, anti-fault system, and clamping system; the switch body 1 is provided with a cylindrical portion 1a; the cylindrical portion 1a is fixedly connected with a reset rod 1b; two rectangular grooves 1c that are centrosymmetric with respect to the cylindrical portion 1a are formed in the cylindrical portion 1a; two mounting pieces 1d are welded to the switch body 1; a pull rope body 2 is provided on each side of the switch body 1; a fixing ring 3 is provided on each side of the switch body 1, and the fixing ring 3 is located on the pull rope body 2; the switch body 1 is connected with an anti-fault system, and the anti-fault system is connected with the pull rope body 2; the switch body 1 is connected with a clamping system, and the clamping system is located outside the anti-fault system; in an emergency, the anti-fault system enables the switch body 1 to control the belt to stop, and at the same time, the anti-fault system prevents the safety device from failing when the switch body 1 fails, resulting in the pull rope switch being easily triggered and the belt stopping. The clamping system is used to clamp the pull rope body 2 when the switch body 1 needs to be disassembled for maintenance, avoiding the situation that once the existing pull rope switch fails, the entire belt will stop. At the same time, when the pull rope switch needs to be removed for maintenance and then reinstalled, the pull rope body 2 will affect other pull rope switches, resulting in the belt stopping. Detailed implementation manner

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] A belt pull rope switch that is convenient for maintenance, as Figure 1-6 shown, includes a switch body 1, a pull rope body 2, a fixing ring 3, an anti-fault system, and a clamping system; the switch body 1 is provided with a cylindrical portion 1a; the cylindrical portion 1a is fixedly connected with a reset rod 1b; two rectangular grooves 1c that are centrosymmetric with respect to the cylindrical portion 1a are formed in the cylindrical portion 1a; two mounting pieces 1d are welded to the switch body 1; a pull rope body 2 is provided on each side of the switch body 1; a fixing ring 3 is provided on each side of the switch body 1, and the fixing ring 3 is located on the pull rope body 2; the switch body 1 is connected with an anti-fault system, and the anti-fault system is connected with the pull rope body 2; the switch body 1 is connected with a clamping system, and the clamping system is located outside the anti-fault system; in an emergency, the anti-fault system enables the switch body 1 to control the belt to stop, and at the same time, the anti-fault system prevents the safety device from failing when the switch body 1 fails, resulting in the pull rope switch being easily triggered and the belt stopping. The clamping system is used to clamp the pull rope body 2 when the switch body 1 needs to be disassembled for maintenance, avoiding the situation that once the existing pull rope switch fails, the entire belt will stop. At the same time, when the pull rope switch needs to be removed for maintenance and then reinstalled, the pull rope body 2 will affect other pull rope switches, resulting in the belt stopping.

[0027] Once the existing pull rope switch fails, the entire belt will stop. At the same time, when the pull rope switch needs to be removed for maintenance and then reinstalled, the pull rope body 2 will affect other pull rope switches, resulting in the belt stopping. In view of this, the present invention provides a belt pull rope switch that is convenient for maintenance.

[0028] During use, first install several of these switches on both sides of the belt conveyor and connect them to each other with the drawstring body 2. Then, manually check the operating status of the switch, turn on the power supply, and control the operation of the switch.

[0029] After that, under normal circumstances, the clamping system does not hold the drawstring body 2, and the fixing ring 3 buckles the drawstring body 2 to prevent shaking. When an emergency occurs and it is necessary to stop the belt, manually pull either one of the drawstring bodies 2 on both sides of the switch body 1 to control the operation of the fault prevention system, causing the cylindrical part 1a to rotate, so that the switch body 1 controls the belt to stop.

[0030] After the emergency is lifted, manually pull the reset rod 1b to rotate the cylindrical part 1a to the initial position, so that the switch body 1 controls the belt to resume production.

[0031] When the switch body 1 fails, at this time, the cylindrical part 1a cannot rotate under the limiting action of the fault prevention system, thus preventing the switch body 1 from controlling the belt to stop, and further avoiding the situation that once the existing switch body 1 fails, it will cause the entire belt to stop and affect production.

[0032] When it is necessary to remove the switch body 1 for maintenance, at this time, manually control the operation of the clamping system, first clamp the drawstring bodies 2 on both sides of the switch body 1 to prevent slack, then unfasten the drawstring bodies 2 connected to both ends of the switch body 1. After the switch body 1 is repaired, reconnect the drawstring bodies 2, which can avoid the situation that when the switch body 1 is removed for maintenance and then reinstalled, the drawstring body 2 will affect other switch bodies 1 and cause the belt to stop.

[0033] The fault prevention system consists of two fault prevention components that are centrosymmetric about the cylindrical part 1a; the fault prevention component includes a first fixed plate 101, a first fixed rod 102, a rotating disk 103, a linkage block 104, a fixed rope 105, an arc-shaped guide rail 106, a pull plate 107, a first slide rail 108, a slider 109, a U-shaped block 1010, a second fixed rod 1011, a third fixed rod 1012, a first linkage rope 1013, a limiting rod 1014, a second linkage rope 1015, a fixed block 1016, and a spring rod 1017; the switch body 1 is fixedly connected to the first fixed plate 101; the first fixed plate 101 is fixedly connected to the first fixed rod 102, and the first fixed rod 102 contacts the pull rope body 2; the first fixed plate 101 is rotatably connected to the rotating disk 103, and a torsion spring is provided between the rotating disk 103 and the first fixed plate 101; the rotating disk 103 is provided with a V-shaped groove 103A; the rotating disk 103 is provided with a first edge portion 103b; the rotating disk 103 is rotatably connected to the linkage block 104, and a spring is connected between the rotating disk 103 and the linkage block 104, and the linkage block 104 is located in the V-shaped groove 103A, and the linkage block 104 is fixedly connected to the pull rope body 2; the rotating disk 103 is fixedly connected to the fixed rope 105; the cylindrical part 1a is fixedly connected to the arc-shaped guide rail 106; the arc-shaped guide rail 106 is slidably connected to the pull plate 107, and a spring is connected between the arc-shaped guide rail 106 and the pull plate 107, and the pull plate 107 is fixedly connected to the fixed rope 105; the pull plate 107 is fixedly connected to the first slide rail 108; the first slide rail 108 is slidably connected to the slider 109; the slider 109 is provided with an end portion 109a; the cylindrical part 1a is fixedly connected to the U-shaped block 1010; the linkage block 104 is fixedly connected to the second fixed rod 1011; the switch body 1 is fixedly connected to the third fixed rod 1012; the third fixed rod 1012 is fixedly connected to two spring rods 1017; the second fixed rod 1011 is fixedly connected to the first linkage rope 1013, and the first linkage rope 1013 bypasses the third fixed rod 1012 and is fixedly connected to the slider 109; the rectangular groove 1c is slidably connected to the limiting rod 1014, and the limiting rod 1014 is fixedly connected to the spring rod 1017; the second fixed rod 1011 is fixedly connected to the second linkage rope 1015, and the second linkage rope 1015 bypasses the third fixed rod 1012 and is fixedly connected to the limiting rod 1014; the cylindrical part 1a is fixedly connected to the fixed block 1016; the fixed block 1016 is provided with a second edge portion 1016a; by manually pulling any one of the pull rope bodies 2 on both sides of the switch body 1 to drive the linkage block 104 to rotate in the direction close to the first edge portion 103b, when the linkage block 104 rotates, the second fixed rod 1011 drives the second linkage rope 1015 to move upward, and the second linkage rope 1015 drives the limiting rod 1014 to compress the spring rod 1017 in the rectangular groove 1c and move away from the cylindrical part 1a, so as to first release the limit of the limiting rod 1014 on the fixed block 1016.

[0034] The clamping system consists of two clamping components that are centrosymmetric about the cylindrical part 1a; the clamping components include a second fixed plate 201, a second slide rail 202, a pushing block 203, a pull rod 204, a wedge block 205, and a clamping plate 206; the mounting piece 1d is bolted to the second fixed plate 201; the second fixed plate 201 is fixedly connected to the second slide rail 202; the second slide rail 202 is slidably connected to the pushing block 203; the pushing block 203 is provided with a pushing portion 203a; the pushing block 203 is fixedly connected to the pull rod 204; the second fixed plate 201 is slidably connected to the clamping plate 206; the clamping plate 206 is fixedly connected to the wedge block 205, and the wedge block 205 cooperates with the pushing block 203; the second fixed plate 201 is fixedly connected to another clamping plate 206, and the two clamping plates 206 are distributed vertically; each of the two clamping plates 206 is provided with a clamping portion 206a; by manually pushing the pull rod 204 backward, the pull rod 204 drives the pushing block 203 to move backward in the second slide rail 202, and the pushing block 203 then pushes the wedge block 205 and the clamping plate 206 to move upward, so that the two clamping plates 206 are closed, thereby clamping the pull cord body 2 on both sides of the switch body 1.

[0035] The surface of the clamping portion 206a is uneven, increasing the friction force on the pull cord body 2, so as to increase the clamping force on the pull cord body 2.

[0036] The pushing portion 203a is inclined, guiding the wedge block 205 so that the wedge block 205 can move upward when moving backward.

[0037] The first edge portion 103b is arc-shaped, reducing the friction force with the pull cord body 2 and preventing the pull cord body 2 from driving the rotating disk 103 to rotate.

[0038] The linkage block 104 is fan-shaped, conforming to the shape of the V-shaped groove 103A to ensure that it can rotate in the V-shaped groove 103A.

[0039] The end portion 109a is arc-shaped, reducing the resistance of the slider 109 to enter the U-shaped block 1010, so as to facilitate the cooperation between the slider 109 and the U-shaped block 1010.

[0040] The cross-section of the limiting rod 1014 is triangular, so that the fixed block 1016 can push the limiting rod 1014 under a large enough rotation torque, so that the cylindrical part 1a rotates, preventing one anti-fault component from blocking the operation of the other anti-fault component.

[0041] A spring is provided between the first slide rail 108 and the slider 109 to facilitate the reset of the cylindrical part 1a.

[0042] The second edge portion 1016a is arc-shaped, reducing the friction force between the fixed block 1016 and the cylindrical rod when the cylindrical part 1a is reset, so that the fixed block 1016 can cross the cylindrical rod.

[0043] The pull rod 204 is arranged in a T shape for easy manual pulling.

[0044] During use, first install several of these switches on both sides of the belt conveyor and connect them to each other with the pull rope body 2. Then, manually check the operating status of the switch, turn on the power supply, and control the operation of the switch.

[0045] After that, under normal circumstances, the clamping plate 206 does not clamp the pull rope body 2, and the fixing ring 3 is installed on the belt conveyor to buckle the pull rope body 2 to prevent shaking. When an emergency occurs and it is necessary to stop the belt, manually pull any one of the pull rope bodies 2 on both sides of the switch body 1 to drive the linkage block 104 to rotate towards the direction close to the first edge portion 103b. When the linkage block 104 rotates, it causes the second fixing rod 1011 to drive the second linkage rope 1015 to move upward. The second linkage rope 1015 drives the limiting rod 1014 to slide leftward in the rectangular groove 1c to compress the spring rod 1017 and move away from the cylindrical portion 1a, thereby first releasing the limit of the limiting rod 1014 on the fixing block 1016.

[0046] During this process, due to the first edge portion 103b being arc-shaped, the friction with the pull rope body 2 is reduced to prevent the pull rope body 2 from driving the rotating disk 103 to rotate.

[0047] During this process, since the pulling force on the pull rope body 2 is large enough, the torque for the cylindrical portion 1a to drive the limiting rod 1014 to rotate is large enough. And the cross-section of the limiting rod 1014 is triangular, so that the fixing block 1016 on another anti-fault component can push the limiting rod 1014 to compress the spring rod 1017 and move away from the cylindrical portion 1a, enabling the cylindrical portion 1a to rotate smoothly and preventing the fixing block 1016 on another anti-fault component from being limited by the limiting rod 1014.

[0048] At the same time, when the linkage block 104 rotates, it causes the second fixing rod 1011 to drive the first linkage rope 1013 to move upward. The first linkage rope 1013 drives the slider 109 to move downward and insert into the U-shaped block 1010, so that the pull plate 107 and the cylindrical portion 1a are synchronized. During this process, due to the end portion 109a being arc-shaped, the resistance for the slider 109 to enter the U-shaped block 1010 is reduced, facilitating the cooperation between the slider 109 and the U-shaped block 1010.

[0049] After that, after the drawstring body 2 drives the linkage block 104 to rotate until it contacts the first edge portion 103b, the drawstring body 2 continues to drive the linkage block 104 to rotate within the V-shaped groove 103A. At this time, the linkage block 104 further causes the rotating disk 103 to drive the drawplate 107 and the components connected thereto to rotate in the direction approaching the first fixing plate 101 through the fixing rope 105, so that the drawplate 107 then drives the cylindrical portion 1a to rotate, thereby causing the switch body 1 to control the belt to stop;

[0050] During this process, through the lag effect of the V-shaped groove 103A on the linkage block 104, it is avoided that the limiting rod 1014 has not yet released the limit on the fixed block 1016 and the slider 109 has not yet been inserted into the U-shaped block 1010, and the fixing rope 105 causes the drawplate 107 to drive the components connected thereto to rotate. And by the linkage block 104 being fan-shaped and conforming to the shape of the V-shaped groove 103A, it is ensured that it can rotate within the V-shaped groove 103A;

[0051] It should be noted that since the drawplate 107 and the components connected thereto slide within the arc-shaped guide rail 106, when one anti-fault component drives the cylindrical portion 1a to rotate, the other anti-fault component does not rotate accordingly;

[0052] After the emergency is lifted, manually pull the reset rod 1b to cause the reset rod 1b to drive the cylindrical portion 1a and the components connected thereto to rotate clockwise from the front view, so that the cylindrical portion 1a rotates to the initial position, thereby causing the switch body 1 to control the belt to resume production;

[0053] During this process, the second edge portion 1016a is arc-shaped, reducing the friction between the fixed block 1016 and the cylindrical rod, so that the fixed block 1016 can cross the cylindrical rod when following the reset of the cylindrical portion 1a;

[0054] And the cylindrical portion 1a causes the slider 109 to drive the components connected thereto to rotate clockwise from the front view through the U-shaped block 1010, so that the drawplate 107 drives the rotating disk 103 to rotate through the fixing rope 105. Through the spring reset between the rotating disk 103 and the linkage block 104, the linkage block 104 drives the second fixing rod 1011 to rotate away from the first edge portion 103b, so that the second fixing rod 1011 relaxes the first linkage rope 1013 and the second linkage rope 1015, and the slider 109 simultaneously pulls the first linkage rope 1013 and the second linkage rope 1015 downward;

[0055] At this time, through the elastic force of the spring rod 1017, the limiting rod 1014 moves in the rectangular groove 1c toward the direction close to the cylindrical portion 1a and returns to the initial position as shown in Figure 2 shown, and under the action of the spring in the first slide rail 108, it drives the slider 109 to move upward and return to as shown in Figure 2The initial position shown, and at the same time, the slider 109 drives the first linkage rope 1013 to complete the reset;

[0056] When the switch body 1 fails, at this time, since the magnitude of the force that the cylindrical portion 1a drives the fixed block 1016 to rotate is less than the critical value at which the spring rod 1017 is compressed, it will not push the limiting rod 1014 to compress the spring rod 1017. Thus, the fixed block 1016 and the cylindrical portion 1a cannot rotate under the limiting action of the limiting rod 1014, thereby preventing the cylindrical portion 1a from rotating when the switch body 1 fails, further controlling the belt to stop, and further avoiding the situation that once the existing switch body 1 fails, it will cause the entire belt to stop and affect production;

[0057] When it is necessary to remove the switch body 1 for maintenance, at this time, manually push the pull rod 204 backward. The pull rod 204 drives the push block 203 to move backward in the second slide rail 202. The push block 203 then pushes the wedge block 205 and the clamping plate 206 upward, so that the two clamping plates 206 are closed, thereby clamping the rope body 2 on both sides of the switch body 1 to prevent slack, and then disconnect the rope body 2 connected to the linkage block 104;

[0058] During this process, the surface of the clamping portion 206a is uneven, increasing the friction force on the rope body 2, so as to increase the clamping force on the rope body 2. And the pushing portion 203a is inclined, guiding the wedge block 205 so that the wedge block 205 can move upward when moving backward. And the pull rod 204 is T-shaped, which is convenient for manual operation to pull the pull rod 204;

[0059] After the switch body 1 is overhauled and reinstalled to the original position, then reconnect the rope body 2 to the linkage block 104. This can avoid the need to tighten the rope body 2 again when reinstalling the switch body 1 after removing it for maintenance, so as to prevent the rope body 2 from pulling other switch bodies 1 and causing the belt to stop;

[0060] After that, manually pull the pull rod 204 forward. The pull rod 204 drives the push block 203 to move forward in the second slide rail 202. The wedge block 205 and the clamping plate 206 move downward under their own gravity, so that the two clamping plates 206 are separated, thereby loosening the rope body 2 on both sides of the switch body 1. At this time, the rope body 2 is still in a tightened state.

[0061] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A belt pull cord switch convenient for maintenance, comprising a switch body (1), a pull cord body (2) and a fixing ring (3); the switch body (1) is provided with a cylindrical portion (1a); a reset rod (1b) is fixedly connected to the cylindrical portion (1a); two rectangular grooves (1c) that are centrosymmetric with respect to the cylindrical portion (1a) are formed in the cylindrical portion (1a); two mounting pieces (1d) are fixedly connected to the switch body (1); a pull cord body (2) is provided on each side of the switch body (1); a fixing ring (3) is provided on each side of the switch body (1), and the fixing ring (3) is located on the pull cord body (2); characterized in that: It also includes a fault prevention system and a clamping system; the switch body (1) is connected to the fault prevention system, and the fault prevention system is connected to the pull rope body (2); the switch body (1) is connected to the clamping system, and the clamping system is located outside the fault prevention system; the fault prevention system is used to prevent the belt from stopping due to a fault of the switch body (1); the clamping system is used to clamp the pull rope body (2) when the switch body (1) needs to be disassembled; The fault prevention system consists of two fault prevention components that are centrosymmetric about the cylindrical part (1a); the fault prevention component includes a first fixing plate (101), a first fixing rod (102), a rotating disk (103), a linkage block (104), a fixing rope (105), an arc-shaped guide rail (106), a pulling plate (107), a first sliding rail (108), a slider (109), a U-shaped block (1010), a second fixing rod (1011), a third fixing rod (1012), a first linkage rope (1013), a limiting rod (1014), a second linkage rope (1015), a fixing block (1016) and a spring rod (1017); the switch body (1) is fixedly connected to the first fixing plate (101); the first fixing plate (101) is fixedly connected to the first fixing rod (102), and the first fixing rod (102) contacts the pull rope body (2); the first fixing plate (101) is rotatably connected to the rotating disk (103), and a torsion spring is provided between the rotating disk (103) and the first fixing plate (101); the rotating disk (103) is provided with a V-shaped groove (103A); the rotating disk (103) is provided with a first edge part (103b); the rotating disk (103) is rotatably connected to the linkage block (104), and a spring is connected between the rotating disk (103) and the linkage block (104), and the linkage block (104) is located in the V-shaped groove (103A), and the linkage block (104) is fixedly connected to the pull rope body (2); the rotating disk (103) is fixedly connected to the fixing rope (105); the cylindrical part (1a) is fixedly connected to the arc-shaped guide rail (106); the arc-shaped guide rail (106) is slidably connected to the pulling plate (107), and a spring is connected between the arc-shaped guide rail (106) and the pulling plate (107), and the pulling plate (107) is fixedly connected to the fixing rope (105); the pulling plate (107) is fixedly connected to the first sliding rail (108); The first sliding rail (108) is slidably connected to the slider (109); the slider (109) is provided with an end part (109a); The cylindrical part (1a) is fixedly connected with a U-shaped block (1010); the linkage block (104) is fixedly connected with a second fixing rod (1011); the switch body (1) is fixedly connected with a third fixing rod (1012); the third fixing rod (1012) is fixedly connected with two spring rods (1017); the second fixing rod (1011) is fixedly connected with a first linkage rope (1013), and the first linkage rope (1013) bypasses the third fixing rod (1012) and is fixedly connected with the slider (109); a limiting rod (1014) is slidably connected to the rectangular groove (1c), and the limiting rod (1014) is fixedly connected with the spring rod (1017); the second fixing rod (1011) is fixedly connected with a second linkage rope (1015), and the second linkage rope (1015) bypasses the third fixing rod (1012) and is fixedly connected with the limiting rod (1014); the cylindrical part (1a) is fixedly connected with a fixing block (1016); the fixing block (1016) is provided with a second edge part (1016a); the limiting rod (1014) is used to prevent the belt from stopping due to a failure of the switch body (1).

2. The belt pull switch according to claim 1, which is convenient for maintenance, is characterized in that, The clamping system consists of two clamping components that are centrosymmetric about the cylindrical part (1a); the clamping component includes a second fixing plate (201), a second sliding rail (202), a pushing block (203), a pull rod (204), a wedge block (205) and a clamping plate (206); the mounting piece (1d) is fixedly connected with the second fixing plate (201); the second fixing plate (201) is fixedly connected with the second sliding rail (202); the second sliding rail (202) is slidably connected with the pushing block (203); the pushing block (203) is provided with a pushing part (203a); the pushing block (203) is fixedly connected with the pull rod (204); the second fixing plate (201) is slidably connected with the clamping plate (206); the clamping plate (206) is fixedly connected with the wedge block (205), and the wedge block (205) cooperates with the pushing block (203); the second fixing plate (201) is fixedly connected with another clamping plate (206), and the two clamping plates (206) are distributed up and down; each of the two clamping plates (206) is provided with a clamping part (206a); the clamping plate (206) is used to clamp the rope body (2) when the switch body (1) needs to be disassembled.

3. The belt pull cord switch according to claim 2, characterized in that, The surface of the clamping part (206a) is uneven.

4. The belt pull cord switch according to claim 2, characterized in that, The pushing part (203a) is inclined.

5. The belt pull switch according to claim 1, which is convenient for maintenance, is characterized in that, The first edge part (103b) is arc-shaped.

6. The belt pull cord switch according to claim 1, which is convenient for maintenance, is characterized in that, The linkage block (104) is fan-shaped.

7. A belt pull cord switch convenient for maintenance according to claim 1, characterized in that, The end part (109a) is arc-shaped.

8. A belt pull cord switch that is convenient for maintenance according to claim 1, characterized in that, The cross-section of the limiting rod (1014) is triangular.

9. The belt pull cord switch according to claim 1, characterized in that, A spring is provided between the first sliding rail (108) and the slider (109).

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