An anti-slip elevator safety tongs for elevator braking safety and its usage method

Abstract

The present invention relates to the technical field of elevator safety tongs, and specifically discloses an anti-slip elevator safety tong for elevator braking safety and its use method, which includes a device outer casing with a square hollow structure. The device outer casing is fixedly installed between the elevator car through a fixing plate fixedly installed on its side surface. An avoidance groove is formed in the middle position of the device outer casing, and the avoidance groove corresponds to an elevator guide rail installed inside the elevator shaft. Moreover, an acceleration sensor for detecting the out-of-control fall of the elevator is fixedly installed on the inner wall of the device outer casing. For this anti-slip elevator safety tong for elevator braking safety and its use method, the extrusion ball is used to extrude the second airbag, so that the air in the second airbag enters the first airbag through the connecting hose. At this time, the first airbag expands and pushes the mounting plate, increasing the extrusion between the mounting plate and the elevator guide rail, thereby increasing the contact friction force and preventing slipping due to excessive acceleration.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator safety tongs, and particularly to a non-slip elevator safety tong for elevator braking safety and its usage method. Background Technique

[0002] An elevator safety tong, also known as an elevator safety clamp or safety device, is a crucial safety component in an elevator system. Its main function is to immediately prevent the elevator from sliding freely when the elevator malfunctions, such as descending at high speed or the support system fails, ensuring the safety of passengers.

[0003] The elevator safety tong mainly achieves the purpose of braking through the squeezing friction force with the elevator guide rail to prevent the elevator from continuing to descend.

[0004] For example, in the prior art, the Chinese patent with the publication number CN108584610A discloses an elevator safety tong, which includes a safety tong seat, an operating rod, a main tong block, a sub-tong block, and a guiding ball. Two sub-tong blocks are symmetrically arranged inside the safety tong seat, such that both sides of the elevator guide rail passing through the safety tong seat are respectively in contact with the two sub-tong blocks. Two main tong blocks are symmetrically arranged on both sides inside the safety tong seat. A guiding ball is provided between the main tong block and the sub-tong block. The surface of the main tong block facing the sub-tong block is a main inclined plane, and the surface of the sub-tong block facing the main tong block is a sub-inclined plane. The main inclined plane and the sub-inclined plane are arranged in parallel. The surface of the sub-tong block facing the elevator guide rail is a vertical plane parallel to the guide rail, and a damping layer is provided on the vertical plane. An operating rod is provided on the sub-tong block.

[0005] Again, in the prior art, the Chinese patent with the publication number CN115872254A discloses an elevator safety tong, which includes a support frame, a U-shaped spring, a first guiding member, a second guiding member, a first wedge block, a second wedge block, and a connecting plate. The U-shaped spring is arranged inside the support frame. The first guiding member and the second guiding member are respectively symmetrically installed inside the U-shaped spring, and the first guiding member and the second guiding member are arranged in a "V" shape. Positioning pins are provided on both the first guiding member and the second guiding member. One end of the positioning pin sequentially passes through the U-shaped spring and the support frame and is threadedly connected to an adjusting nut. The first wedge block and the second wedge block are respectively slidably installed on the first guiding member and the second guiding member. A guiding position is formed between the first wedge block and the second wedge block, and the elevator guide rail is matched with the guiding position. The first wedge block and the second wedge block are respectively movably connected to the connecting plate, and the connecting plate is connected to the action end of the elevator speed limiter.

[0006] Combined with the above materials, it can be seen that in the prior art, the purpose of squeezing braking is generally achieved through the cooperation between the wedge block and the friction block. However, in the actual use process, generally only one set of friction blocks is provided in the device, and only one set of friction blocks may slip due to insufficient braking force during operation, thus affecting the safety of the elevator. Summary of the Invention

[0007] The purpose of the present invention is to provide a non-slip elevator safety tongs for elevator braking safety and its use method to solve the problem of slipping due to insufficient braking force in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: a non-slip elevator safety tongs for elevator braking safety and its use method, including a device outer casing with a square hollow structure, the device outer casing is fixedly installed between the elevator car through a fixing plate fixedly installed on its side, and further includes:

[0009] An avoidance groove is provided at the middle position of the device outer casing, and the avoidance groove corresponds to an elevator guide rail installed inside the elevator shaft, and an acceleration sensor for detecting the out-of-control falling of the elevator is fixedly installed on the inner wall of the device outer casing;

[0010] Guide blocks are fixedly installed on the left and right sides inside the device outer casing, and extrusion blocks that match them are fitted on the sides of the guide blocks. The contact surfaces of the extrusion blocks and the guide blocks are both set to be inclined structures. A telescopic cylinder is fixedly installed on the lower surface inside the device outer casing, and an adsorption magnet for adsorbing the extrusion blocks is fixedly installed at the top of the telescopic cylinder;

[0011] An installation plate corresponding to the extrusion block is installed on the side of the extrusion block, and rubber friction strips evenly distributed at equal intervals are fixedly installed on the outer surface of the installation plate. And a pushing mechanism for maintaining the extrusion force is provided between the installation plate and the extrusion block;

[0012] A storage box is fixedly installed inside the device outer casing, and carbon powder for increasing friction is stored inside the storage box.

[0013] Preferably, a limit slider is fixedly installed on the outer surface of the extrusion block, and the limit slider is slidably connected to a limit chute opened on the outer surface of the guide block.

[0014] Preferably, the pushing mechanism includes a first airbag fixedly installed between the extrusion block and the guide block and a second airbag fixedly installed outside the side of the extrusion block.

[0015] Preferably, the first airbag and the second airbag form a mutually communicating structure through a connecting hose, and the second airbag corresponds to and presses against an extrusion ball fixedly installed on the outer surface of the guide block.

[0016] Preferably, mounting holes are opened at the four corner positions of the outer surface of the extrusion block, and the mounting holes correspond to mounting posts fixedly installed on the back of the mounting plate.

[0017] Preferably, two friction rollers with rough surfaces are symmetrically installed below the device housing, and a connecting rod rotatably connected to the lower surface of the device housing is fixedly installed on the side surface of the friction roller.

[0018] Preferably, a return spring is fixedly installed between the upper surface of the connecting rod and the lower surface of the device housing, and a pulling rod is rotatably installed on the upper surface of the front end of the connecting rod. Moreover, an installation rod is rotatably installed at the upper end of the pulling rod, and the upper end of the installation rod is fixedly connected to the telescopic end of the telescopic cylinder.

[0019] Preferably, a coating spray head is fixedly installed on the rear side wall inside the device housing, and the position of the coating spray head corresponds to the position of the installation plate. Moreover, the coating spray head is communicated with the storage box through a delivery pipe.

[0020] Preferably, a stirring rod for stirring and rubbing carbon powder is rotatably installed inside the storage box, and the stirring rod is coaxially and fixedly installed with the friction roller. Moreover, the outer surface of the friction roller is in frictional contact with the elevator guide rail.

[0021] Preferably, a use method of a non-slip elevator safety tongs for elevator braking safety is characterized by including the following steps:

[0022] S1. Fix the device housing on the outside of the elevator car by using the fixing plate. At this time, the elevator guide rail is embedded in the avoidance groove opened in the device housing.

[0023] S2. When the elevator malfunctions and falls uncontrollably, the acceleration sensor detects this phenomenon and controls the telescopic cylinder through the computer board, so that the telescopic cylinder pushes the extrusion block upward. Under the action of the inclined surface, the two extrusion blocks approach each other to achieve extrusion and friction on the elevator guide rail, achieving the purpose of braking.

[0024] S3. After the extrusion block moves upward, the extrusion ball is used to extrude the second airbag, so that the air in the second airbag is conveyed to the first airbag through the connecting hose. At this time, the first airbag expands to push the installation plate to ensure the extrusion force between the installation plate and the elevator guide rail.

[0025] S4. When the telescopic cylinder extends, it drives the installation rod to move synchronously. Then, under the action of the pulling rod and the connecting rod, the friction roller is pulled to approach and press the elevator guide rail, achieving the purpose of secondary braking.

[0026] S5. The coating spray head regularly sprays the carbon powder in the storage box on the surface of the installation plate through the delivery pipe to increase its friction and prevent slipping.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: The non-slip elevator safety tongs for elevator braking safety and its use method adopt a novel structural design, and the specific content is as follows:

[0028] 1. Use an acceleration sensor to detect the uncontrolled falling situation of the elevator. When this situation occurs, activate the telescopic cylinder. Use the telescopic cylinder to push the extrusion block upward. Under the combined action of the inclined surface of the extrusion block and the guiding block, the two extrusion blocks approach each other. Finally, use the friction strip outside the mounting plate to friction the elevator guide rail to achieve the purpose of braking.

[0029] Furthermore, after the extrusion block moves upward, the second airbag on the outer side of its side moves to a position corresponding to the extrusion ball. At this time, use the extrusion ball to squeeze the second airbag, so that the air in the second airbag enters the first airbag through the connecting hose. At this time, the first airbag expands and pushes the mounting plate, increasing the extrusion between the mounting plate and the elevator guide rail, thereby increasing the contact friction force and preventing slipping due to excessive acceleration.

[0030] 2. When the telescopic cylinder extends, it drives the mounting rod to move upward synchronously. At this time, the mounting rod drives the pulling rod at its lower end to rotate. Use the pulling rod to drive the connecting rod to rotate upward, so that the friction roller at the bottom end of the connecting rod moves to a position where it extrudes the outer surface of the elevator guide rail. Use the friction roller to provide friction force again to achieve the purpose of secondary braking and ensure the overall braking effect of the device.

[0031] 3. The regular spraying nozzle sprays the carbon ink in the storage box onto the surface of the mounting plate through the delivery pipe. Use the carbon powder to increase its friction force. And when the device is running, use the elevator guide rail to drive the friction roller to rotate, so that the friction roller drives the stirrer to stir the carbon powder in the storage box, increasing the static electricity on the surface of the carbon powder, so that it can be better adsorbed on the surface of the mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the disassembled structure of the guiding block and the extrusion block of the present invention;

[0034] Figure 3 It is a schematic diagram of the disassembled structure of the extrusion block and the mounting plate of the present invention;

[0035] Figure 4 It is of the present invention Figure 3 The enlarged structure schematic diagram at position A in;

[0036] Figure 5 It is a schematic diagram of the bottom surface structure of the housing of the device of the present invention;

[0037] Figure 6 It is of the present invention Figure 5 The enlarged structure schematic diagram at position B in;

[0038] Figure 7Schematic diagram of the back structure of the housing of the device of the present invention;

[0039] Figure 8 Schematic diagram of the sectional structure of the housing of the device of the present invention;

[0040] Figure 9 Schematic diagram of the positional relationship between the elevator guide rail and the friction roller of the present invention;

[0041] Figure 10 Schematic diagram of the sectional structure of the storage box of the present invention.

[0042] In the figure: 1. Housing of the device; 101. Fixed plate; 2. Avoidance groove; 3. Elevator guide rail; 4. Acceleration sensor; 5. Guide block; 6. Extrusion block; 7. Telescopic cylinder; 8. Adsorption magnet; 9. Limit slider; 10. Limit chute; 11. Mounting plate; 12. Friction strip; 13. First airbag; 14. Second airbag; 15. Connecting hose; 16. Extrusion ball; 17. Mounting column; 18. Mounting hole; 19. Friction roller; 20. Connecting rod; 21. Return spring; 22. Pulling rod; 23. Mounting rod; 24. Storage box; 25. Coating spray head; 26. Delivery pipe; 27. Stirring rod; 28. Friction roller. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] Embodiment 1: Please refer to Figures 1 - 4, in order to solve the problem that the traditional device slips during braking due to excessive acceleration, the following technical solution is provided. By using a pushing mechanism to increase the extrusion force between the mounting plate 11 and the elevator guide rail 3 to enhance the friction braking effect, specifically, it discloses: a device housing 1 with a square hollow structure, the device housing 1 is fixedly installed between the elevator car through a fixing plate 101 fixedly installed on its side, a relief groove 2 is provided at the middle position of the device housing 1, and the relief groove 2 corresponds to the elevator guide rail 3 installed inside the elevator shaft, and an acceleration sensor 4 for detecting the out-of-control falling of the elevator is fixedly installed on the inner wall of the device housing 1. Guide blocks 5 are fixedly installed on the left and right sides inside the device housing 1, and extrusion blocks 6 that match them are fitted on the sides of the guide blocks 5. The contact surfaces of the extrusion blocks 6 and the guide blocks 5 are both set as inclined structures. A telescopic cylinder 7 is fixedly installed on the lower surface inside the device housing 1, and an adsorption magnet 8 for adsorbing the extrusion block 6 is fixedly installed at the top of the telescopic cylinder 7. A mounting plate 11 corresponding to the extrusion block 6 is installed on the side of the extrusion block 6, and rubber friction strips 12 evenly distributed at equal intervals are fixedly installed on the outer surface of the mounting plate 11. And a pushing mechanism for maintaining the extrusion force is provided between the mounting plate 11 and the extrusion block 6. The pushing mechanism includes a first airbag 13 fixedly installed between the extrusion block 6 and the guide block 5 and a second airbag 14 fixedly installed outside the side of the extrusion block 6. The first airbag 13 and the second airbag 14 form a mutually communicating structure through a connecting hose 15, and the second airbag 14 corresponds to and squeezes an extrusion ball 16 fixedly installed on the outer surface of the guide block 5. Mounting holes 18 are provided at the four corner positions of the outer surface of the extrusion block 6, and the mounting holes 18 correspond to mounting posts 17 fixedly installed on the back of the mounting plate 11. A limiting slider 9 is fixedly installed on the outer surface of the extrusion block 6, and the limiting slider 9 is slidably connected to a limiting chute 10 provided on the outer surface of the guide block 5.

[0045] When using the device, first, the device outer casing 1 is fixedly installed outside the elevator car by using the fixing plate 101. Then, when the elevator runs normally, the elevator guide rail 3 slides correspondingly in the avoidance groove 2 without generating friction. When the elevator falls out of control, the acceleration sensor 4 detects this situation and activates the telescopic cylinder 7 through the central control computer. At this time, the telescopic cylinder 7 pushes the extrusion block 6 upward (when in normal use, the telescopic cylinder 7 contracts, and under the adsorption of the adsorption magnet 8, it drives the extrusion block 6 to move downward). The extrusion block 6 moves upward relative to the guide block 5 by using the sliding between the external limit slider 9 and the limit chute 10. By using the cooperation of the inclined surfaces between the two, the extrusion block 6 moves toward the middle, and finally, the friction strip 12 on the outer surface of the mounting plate 11 contacts and rubs against the elevator guide rail 3 to achieve the purpose of braking. When the extrusion block 6 moves to the upper part, the second airbag 14 on the outer side of its side moves to the position corresponding to the extrusion ball 16. At this time, the extrusion ball 16 squeezes the second airbag 14, and the air inside the second airbag 14 enters the first airbag 13 through the connecting hose 15, causing the first airbag 13 to expand and push the mounting plate 11 (limiting the mounting plate 11 by using the cooperation between the mounting post 17 and the mounting hole 18), increasing the extrusion friction force between the mounting plate 11 and the elevator guide rail 3 and avoiding slipping.

[0046] Embodiment Two: Please refer to Figures 5 - 6 , in order to achieve a better braking effect in this embodiment, the following technical solution is provided. The elevator is secondarily braked by using the friction roller 19 to ensure its braking effect. Specifically, it is disclosed that: Two friction rollers 19 with rough surfaces are symmetrically installed below the device outer casing 1, and a connecting rod 20 rotatably connected to the lower surface of the device outer casing 1 is fixedly installed on the side surface of the friction roller 19. A return spring 21 is fixedly installed between the upper surface of the connecting rod 20 and the lower surface of the device outer casing 1. A pulling rod 22 is rotatably installed on the upper surface of the front end of the connecting rod 20, and an installation rod 23 is rotatably installed at the upper end of the pulling rod 22. The upper end of the installation rod 23 is fixedly connected to the telescopic end of the telescopic cylinder 7.

[0047] When the telescopic cylinder 7 extends, its telescopic end drives the installation rod 23 to move upward synchronously. At this time, the installation rod 23 drives the pulling rod 22 to rotate. Under the pulling action of the pulling rod 22, the connecting rod 20 is driven to rotate upward (normally, the position of the connecting rod 20 is maintained under the pushing action of the return spring 21). The friction roller 19 is brought close to and pressed against the elevator guide rail 3 by the upward rotation of the connecting rod 20, and the purpose of secondary braking is achieved by using the friction force.

[0048] Embodiment Three: Please refer to Figures 7 - 10, in order to solve the problem of the decrease in the frictional force on the surface of the friction block, the following technical solution is provided. By adding carbon powder, the surface frictional force is ensured. Specifically, it is disclosed that: a storage box 24 is fixedly installed inside the device housing 1, and carbon powder for increasing the frictional force is stored inside the storage box 24. A coating spray head 25 is fixedly installed on the rear side wall inside the device housing 1, and the position of the coating spray head 25 corresponds to the position of the mounting plate 11. Moreover, the coating spray head 25 is interconnected with the storage box 24 through a delivery pipe 26. A stirring rod 27 for stirring and rubbing the carbon powder is rotatably installed inside the storage box 24, and the stirring rod 27 is coaxially fixedly installed with the friction roller 28. Moreover, the outer surface of the friction roller 28 is in frictional contact with the elevator guide rail 3.

[0049] When the elevator is running normally, the frictional force between the elevator guide rail 3 and the friction roller 28 drives the stirring rod 27 to rotate, thereby using the stirring rod 27 to stir the carbon powder stored inside the storage box 24, causing the carbon powder to rub against each other to generate static electricity. Then, the coating spray head 25 is periodically opened, and the coating spray head 25 is used to spray the carbon powder in the storage box 24 onto the outer surface of the mounting plate 11 through the delivery pipe 26 (the carbon powder with static electricity can achieve a better adhesion effect), increasing the frictional force on the surface of the mounting plate 11.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-slip elevator safety gear for elevator braking safety, comprising a device outer casing (1) having a square hollow structure, the device outer casing (1) being fixedly installed between the elevator car through a fixing plate (101) fixedly installed on its side, characterized in that, It further includes: An avoidance groove (2) is provided at the middle position of the device outer casing (1), and the avoidance groove (2) corresponds to an elevator guide rail (3) installed inside the elevator shaft. An acceleration sensor (4) for detecting the out-of-control fall of the elevator is fixedly installed on the inner wall of the device outer casing (1); Guide blocks (5) are fixedly installed on the left and right sides inside the device outer casing (1), and extrusion blocks (6) matching the guide blocks (5) are fitted on the sides of the guide blocks (5). The contact surfaces of the extrusion blocks (6) and the guide blocks (5) are both arranged in an inclined structure. A telescopic cylinder (7) is fixedly installed on the lower surface inside the device outer casing (1), and an adsorption magnet (8) for adsorbing the extrusion blocks (6) is fixedly installed at the top of the telescopic cylinder (7); An installation plate (11) corresponding to the extrusion block (6) is installed on the side of the extrusion block (6), and rubber friction strips (12) evenly distributed at equal intervals are fixedly installed on the outer surface of the installation plate (11). A pushing mechanism for maintaining the extrusion force is provided between the installation plate (11) and the extrusion block (6); A storage box (24) is fixedly installed inside the device outer casing (1), and carbon powder for increasing friction is stored inside the storage box (24); The pushing mechanism includes a first airbag (13) fixedly installed between the extrusion block (6) and the guide block (5) and a second airbag (14) fixedly installed outside the side of the extrusion block (6); The first airbag (13) and the second airbag (14) form a mutually connected structure through a connecting hose (15), and the second airbag (14) corresponds to and presses against an extrusion ball (16) fixedly installed on the outer surface of the guide block (5); 2. The anti-slip type elevator safety tongs for elevator braking safety according to claim 1, characterized in that: A limit slider (9) is fixedly installed on the outer surface of the extrusion block (6), and the limit slider (9) is slidably connected to a limit chute (10) provided on the outer surface of the guide block (5); 3. The anti-slip elevator safety tongs for elevator braking safety according to claim 2, characterized in that: Mounting holes (18) are provided at the four corner positions on the outer surface of the extrusion block (6), and the mounting holes (18) correspond to mounting posts (17) fixedly installed on the back of the mounting plate (11); 4. The anti-slip elevator safety tongs for elevator braking safety according to claim 3, characterized in that: Two friction rollers (19) with rough surfaces are symmetrically installed below the device outer casing (1), and a connecting rod (20) rotatably connected to the lower surface of the device outer casing (1) is fixedly installed on the side of the friction roller (19); 5. The anti-slip type elevator safety tongs for elevator braking safety according to claim 4, characterized in that: A return spring (21) is fixedly installed between the upper surface of the connecting rod (20) and the lower surface of the device outer casing (1). A pulling rod (22) is rotatably installed on the upper surface of the front end of the connecting rod (20), and a mounting rod (23) is rotatably installed at the upper end of the pulling rod (22). The upper end of the mounting rod (23) is fixedly connected to the telescopic end of the telescopic cylinder (7); 6. The anti-slip elevator safety tongs for elevator braking safety according to claim 5, characterized in that: A coating spray head (25) is fixedly installed on the rear side wall inside the device outer casing (1), and the position of the coating spray head (25) corresponds to the position of the mounting plate (11). The coating spray head (25) is mutually connected to the storage box (24) through a delivery pipe (26); 7. The anti-slip elevator safety tongs for elevator braking safety according to claim 6, characterized in that: A stirring rod (27) for friction stirring of carbon powder is rotatably installed inside the storage box (24), and the stirring rod (27) is coaxially and fixedly installed with the friction roller (28), and the outer surface of the friction roller (28) is in frictional contact with the elevator guide rail (3).

8. A method for using an anti-slip elevator safety tongs for elevator braking safety according to claim 7, characterized in that, It includes the following steps: S1. Use the fixing plate (101) to fixedly install the device housing (1) outside the elevator car. At this time, the elevator guide rail (3) is embedded in the avoidance groove (2) opened in the device housing (1); S2. When the elevator fails and falls uncontrollably, the acceleration sensor (4) detects this phenomenon and controls the telescopic cylinder (7) through the computer board, so that the telescopic cylinder (7) pushes the extrusion block (6) upward. Under the action of the inclined surface, the two extrusion blocks (6) approach each other to achieve the extrusion friction of the elevator guide rail (3) and achieve the purpose of braking; S3. After the extrusion block (6) moves upward, the extrusion ball (16) is used to extrude the second airbag (14), so that the air in the second airbag (14) is conveyed to the first airbag (13) through the connecting hose (15). At this time, the first airbag (13) expands to push the mounting plate (11) to ensure the extrusion force between the mounting plate (11) and the elevator guide rail (3); S4. While the telescopic cylinder (7) extends, it drives the mounting rod (23) to move synchronously. Then, under the action of the pulling rod (22) and the connecting rod (20), the friction roller (19) is pulled to approach and press the elevator guide rail (3) to achieve the purpose of secondary braking; S5. The spraying nozzle (25) regularly sprays the carbon powder in the storage box (24) onto the surface of the mounting plate (11) through the delivery pipe (26) to increase its friction and prevent slipping.

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