Explosion-proof safety tongs

By using filter mesh and wear-resistant flame-retardant materials in elevator safety pliers to isolate dust and sand, and using the design of wire rope and beryllium bronze pliers, the failure problem of elevator safety pliers due to sand and dust is solved, and the elevator is effective Emergency stop and prevent sparks.

CN222118565UActive Publication Date: 2024-12-06GUANGDONG HUAHUI ELEVATOR PARTS CO LTD
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Patent Information

Application Number
CN202420956518.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-06
Publication Date
2024-12-06
Estimated Expiration
2034-05-06

AI Technical Summary

Technical Problem

During the long-term use of existing elevator safety clamps, the rail guides cannot be clamped due to the sand and dust at the jaws, causing the elevator car to continue to slide downward, resulting in failure.

Method used

An explosion-proof safety pliers were designed, using filter mesh and a filter mesh with wear-resistant flame retardant material to isolate dust and sand inside the elevator shaft, and connected to the speed limiter through a wire rope to assist in pulling the sliding block, and a clamp made of beryllium bronze The block contacts the guide rail to avoid sparks and contacts the guide rail through the concave friction plate to achieve braking when the block is worn.

Benefits of technology

Effectively block dust and sand in the elevator shaft to avoid affecting the operation of the clamp block, ensure that the elevator can work normally during emergency stopping, prevent sparks, and extend the equipment life through replaceable filters and friction plates.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of elevator safety tongs, and provides an anti-explosion safety tongs which comprises an upper shell, a lower shell and a protection plate integrally formed with the lower shell, a fixing piece is arranged between the upper shell and the lower shell, a sliding groove is formed in one face of the upper shell, and a sliding block is arranged in the sliding groove. The inner wall of the sliding groove is slidably connected with two symmetrically-arranged limiting blocks, one face of each limiting block is provided with a first screw hole, and the two faces of each limiting block are provided with a plurality of second screw holes. According to the elevator, the structure is reasonable, dust and sand in an elevator shaft are blocked through the filter screens in the dustproof pieces in the elevator using process, the dust is prevented from making contact with the clamp blocks, and in addition, when the L-shaped pulling plates get close to each other due to external force, the two filter screens close to each other deform, and operation of the clamp blocks is prevented from being affected.
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Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety clamps, in particular to an explosion-proof safety clamp. Background Art

[0002] The elevator safety clamp device is a safety device that stops the car urgently and clamps it on the guide rail when the elevator speed exceeds the limit (or rated) speed set by the elevator speed limiter, or when the suspension rope breaks or loosens. It provides effective protection for the safe operation of the elevator and is generally installed on the car frame or counterweight frame.

[0003] The existing safety clamp uses the elastic connection of the clamp body to achieve the contact and locking of the locking piece and the guide rail to achieve the purpose of emergency stopping of the elevator. During the long-term use of the elevator, sand and dust are trapped in the jaws of the safety clamp, and the safety clamp wedge cannot clamp the rail guide rail, so the car continues to slide downward, causing failure. Utility Model Content

[0004] The utility model provides an explosion-proof safety clamp, which solves the problem in the related art that during long-term use of an elevator, sand and dust are contained in the jaws of the safety clamp, the safety clamp wedge cannot clamp the rail guide rail, and the car continues to slide downward, causing failure.

[0005] The technical solution of the utility model is as follows: an explosion-proof safety clamp, comprising: an upper shell, a lower shell and a protective plate integrally formed with the lower shell, a fixing piece is provided between the upper shell and the lower shell, a sliding groove is provided on one side of the upper shell, two symmetrically arranged limit blocks are slidably connected to the inner wall of the sliding groove, a screw hole 1 is provided on one side of the limit block, and a plurality of screw holes 2 are provided on both sides of the limit block;

[0006] A U-shaped connecting plate is provided between the protective plate and the limiting block, a connecting piece matching the U-shaped connecting plate and the limiting block is provided on the surface of the protective plate, a clamping plate is provided on both sides of the limiting block, and a connecting bolt three matching the clamping plate is threadedly connected to the inner wall of the screw hole two;

[0007] A flow guide is provided between the clamping plate and the limit block, a sliding block is provided on the surface of the flow guide, a screw hole three is provided on the surface of the sliding block, a clamp block is provided on one side of the sliding block, a connecting bolt four matching the clamp block is threadedly connected to the inner wall of the screw hole three, an opening is provided on the outer surface of the sliding block, a shaft tube is fixedly connected to the inner wall of the opening, a rotating shaft one is rotatably connected to the inner wall of the shaft tube, and an L-shaped pulling plate is fixedly connected to the surface of the rotating shaft one;

[0008] Two groups of dustproof parts are fixedly connected to the surface of the L-shaped pulling plate.

[0009] Optionally, the fixing member includes a fixing hole 1, a connecting base block, a connecting bolt 1 and a nut 1 threadedly connected to the outer surface of the connecting bolt 1;

[0010] There are a plurality of fixing holes 1, and the fixing holes 1 are respectively opened on the surface of the upper shell and the lower shell, and a through hole matching the connecting bolt 1 is opened on the surface of the connecting base block.

[0011] Optionally, the connecting member includes a connecting hole provided on the surface of the protective plate, a clamping hole provided on the surface of the U-shaped connecting plate, a fixing screw provided on the inner wall of the connecting hole, and a nut second threadedly connected to the surface of the fixing screw;

[0012] A portion of the fixing screw is located inside the holding hole and is used to fix the U-shaped connecting plate. One end of the surface of the fixing screw is threadedly connected to one of the screw holes.

[0013] Optionally, the guide member includes a limit frame provided on the inner wall of the clamping plate and a plurality of rotating shafts 2 rotatably connected to the inner wall of the limit frame;

[0014] The second rotating shaft is in contact with the sliding block, and the sliding block is slidably connected with the clamping plate.

[0015] Optionally, the dustproof member includes a connecting frame arranged on the surface of the L-shaped pulling plate, four screw holes opened on the surface of the L-shaped pulling plate, two connecting bolts threadedly connected to the inner wall of the four screw holes, and a filter screen fixedly connected to one side of the connecting frame;

[0016] The filter screen undergoes a predetermined deformation when subjected to a predetermined force.

[0017] Optionally, a clamping block that matches the limiting block is fixedly connected to the inner wall of the protective plate, and a limiting groove that matches the limiting block is formed on the surface of the clamping block.

[0018] Optionally, a screw hole three is provided on one side of the U-shaped connecting plate, a fixing hole two is provided on the surface of the clamping block, and a fixing bolt matching the screw hole three is provided on the inner wall of the fixing hole two.

[0019] Optionally, a steel wire rope is fixedly connected to the surface of the sliding block, and a sleeve matching the steel wire rope is fixedly connected to one side of the L-shaped pulling plate.

[0020] Optionally, the clamp block is made of beryllium bronze, a mounting groove is provided on one side of the clamp block, a friction plate is fixedly connected to the inner wall of the mounting groove, and two symmetrically arranged guide plates are provided on the surface of the upper shell.

[0021] The working principle and beneficial effects of the utility model are:

[0022] 1. The structure of the present application is reasonable. The filter in the dustproof part can block the dust and sand inside the elevator shaft during the use of the elevator, thereby preventing the dust from contacting the clamp block. In addition, when the L-shaped pulling plate is pulled by external force, the two filters close to each other are deformed to avoid affecting the operation of the clamp block.

[0023] 2. The present application has a reasonable structure. The steel wire rope is connected to the connecting steel wire controlled by the speed limiter to assist the L-shaped pulling plate in pulling the sliding block to move. At the same time, the clamp block made of beryllium bronze contacts the guide rail to avoid sparks when the two contact. In addition, when the surface of the clamp block is excessively worn, the friction plate arranged in the concave part contacts the guide rail to achieve the purpose of braking the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0026] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0027] Figure 3 It is a schematic diagram of the local three-dimensional structure of the utility model Figure 1 ;

[0028] Figure 4 It is a schematic diagram of the local three-dimensional structure of the utility model Figure 2 ;

[0029] Figure 5 It is a side view structural schematic diagram of the clamp block in the utility model;

[0030] In the figure: 1. upper shell; 2. lower shell; 3. protective plate; 4. connecting bolt 1; 5. connecting base block; 6. friction plate; 7. L-shaped pulling plate; 8. connecting frame; 9. connecting bolt 2; 10. filter screen; 11. wire rope; 12. rotating shaft 1; 13. clamping block; 14. clamping plate; 15. connecting bolt 3; 16. nut 1; 17. U-shaped connecting plate; 18. fixing bolt; 19. fixing screw; 20. nut 2; 21. limit block; 22. rotating shaft 2; 23. sliding block; 24. shaft tube; 25. clamp block; 26. connecting bolt 4; 27. sleeve; 28. limit frame; 29. ​​guide plate. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1

[0033] See also Figure 1 - Figure 5 The utility model provides an explosion-proof safety clamp, comprising: an upper shell 1, a lower shell 2 and a protective plate 3 integrally formed with the lower shell 2, a fixing piece is provided between the upper shell 1 and the lower shell 2, a sliding groove is provided on one side of the upper shell 1, and two symmetrically arranged limit blocks 21 are slidably connected to the inner wall of the sliding groove, a screw hole 1 is provided on one side of the limit block 21, and a plurality of screw holes 2 are provided on both sides of the limit block 21;

[0034] A U-shaped connecting plate 17 is provided between the protective plate 3 and the limiting block 21, a connecting piece matching the U-shaped connecting plate 17 and the limiting block 21 is provided on the surface of the protective plate 3, a clamping plate 14 is provided on both sides of the limiting block 21, and a connecting bolt 3 15 matching the clamping plate 14 is threadedly connected to the inner wall of the screw hole 2;

[0035] A guide member is provided between the clamping plate 14 and the limit block 21, a sliding block 23 is provided on the surface of the guide member, a screw hole 3 is provided on the surface of the sliding block 23, a clamp block 25 is provided on one side of the sliding block 23, a connecting bolt 4 26 matching the clamp block 25 is threadedly connected to the inner wall of the screw hole 3, an opening is provided on the outer surface of the sliding block 23, a shaft tube 24 is fixedly connected to the inner wall of the opening, a rotating shaft 12 is rotatably connected to the inner wall of the shaft tube 24, and an L-shaped pulling plate 7 is fixedly connected to the surface of the rotating shaft 12;

[0036] Two sets of dustproof parts are fixedly connected to the surface of the L-shaped pulling plate 7 .

[0037] When in use, the speed limiter of the elevator is fixedly connected to the L-shaped pulling plate 7 via the connecting steel wire. When the elevator falls rapidly, the speed limiter pulls the L-shaped pulling plate 7 via the connecting steel wire to rotate inside the shaft tube 24 via the rotating shaft 12, so that the sliding block 23 slides with the clamping plate 14 via the guide piece, so that the two clamp blocks 25 are in contact with the guide rail surface, thereby achieving the effect of braking the elevator;

[0038] The dustproof piece can block the dust inside the elevator shaft during the use of the elevator, thereby preventing the dust from contacting the clamp block 25.

[0039] Furthermore, the fixing member includes a fixing hole 1, a connecting base block 5, a connecting bolt 14 and a nut 16 threadedly connected to the outer surface of the connecting bolt 14;

[0040] There are multiple fixing holes 1, and the fixing holes 1 are respectively opened on the surface of the upper shell 1 and the lower shell 2, and the surface of the connecting base block 5 is opened with a through hole matching the connecting bolt 1 4.

[0041] By removing the lower nut 16, the connecting bolt 4 is separated from the fixing hole 1 and the through hole, so that the upper shell 1 and the lower shell 2 can be easily separated.

[0042] Furthermore, the connecting member includes a connecting hole provided on the surface of the protective plate 3, a clamping hole provided on the surface of the U-shaped connecting plate 17, a fixing screw 19 provided on the inner wall of the connecting hole, and a nut 20 threadedly connected to the surface of the fixing screw 19;

[0043] A portion of the fixing screw 19 is located inside the holding hole, and is used to fix the U-shaped connecting plate 17 . One end of the surface of the fixing screw 19 is threadedly connected to one of the screw holes.

[0044] Specifically, the fixing screw 19 passes through the connecting hole and the clamping hole and is threadedly connected with the screw hole on the surface of the limiting block 21 , so as to fix the limiting block 21 and the U-shaped connecting plate 17 .

[0045] Furthermore, the flow guide member includes a limit frame 28 provided on the inner wall of the clamping plate 14 and a plurality of rotating shafts 22 rotatably connected to the inner wall of the limit frame 28;

[0046] The second rotating shaft 22 is in contact with the sliding block 23 , and the sliding block 23 is slidably connected to the clamping plate 14 .

[0047] Specifically, when the sliding block 23 is moved by force, one side of the sliding block 23 contacts the second rotating shaft 22 to assist the sliding block 23 in moving, and the clamping plate 14 limits the moving range of the sliding block 23 at the same time.

[0048] Furthermore, the dustproof part includes a connecting frame 8 provided on the surface of the L-shaped pulling plate 7, four screw holes provided on the surface of the L-shaped pulling plate 7, two connecting bolts 9 threadedly connected to the inner wall of the four screw holes, and a filter screen 10 fixedly connected to one side of the connecting frame 8;

[0049] The filter 10 undergoes a predetermined deformation under a predetermined force, and contacts the guide rail inside the elevator shaft. The filter 10 can be adjusted according to the size of the guide rail to facilitate contact with the guide rail to achieve a dust-proof effect. At the same time, the filter 10 is made of wear-resistant and flame-retardant materials to avoid friction damage with the guide rail.

[0050] Specifically, the dust and sand inside the elevator shaft are isolated by the filter 10 to prevent the dust and sand from contacting the clamp block 25. At the same time, when the L-shaped pulling plate 7 is pulled by an external force, the two filter screens 10 close to each other are deformed to avoid affecting the operation of the clamp block 25. At the same time, when the elevator maintenance personnel perform regular maintenance on the elevator, if the filter screen 10 is squeezed and damaged, a new filter screen 10 can be replaced.

[0051] Furthermore, a clamping block 13 that matches the limiting block 21 is fixedly connected to the inner wall of the protective plate 3, and a limiting groove that matches the limiting block 21 is opened on the surface of the clamping block 13;

[0052] A screw hole three is provided on one side of the U-shaped connecting plate 17 , a fixing hole two is provided on the surface of the clamping block 13 , and a fixing bolt 18 matching the screw hole three is provided on the inner wall of the fixing hole two.

[0053] Specifically, the limiting groove is connected to the limiting block 21 to fix the limiting block 21, and the fixing bolt 18 is three-phase threadedly connected to the screw hole to fix the U-shaped connecting plate 17.

[0054] Embodiment 2

[0055] Based on the first embodiment, the present embodiment includes: a steel wire rope 11 is fixedly connected to the surface of the sliding block 23, and a sleeve 27 matching the steel wire rope 11 is fixedly connected to one side of the L-shaped pulling plate 7;

[0056] The clamp block 25 is made of beryllium bronze, and a mounting groove is provided on one side of the clamp block 25. A friction plate 6 is fixedly connected to the inner wall of the mounting groove. Two symmetrically arranged guide plates 29 are provided on the surface of the upper shell 1. The guide plates 29 are made of nylon. When in use, the guide plates 29 are used to prevent the clamp block 25 from contacting the guide rail.

[0057] The steel wire rope 11 is connected to the connecting steel wire controlled by the speed limiter to assist the L-shaped pulling plate 7 in pulling the sliding block 23 to move. At the same time, the clamp block 25 made of beryllium bronze contacts the guide rail to avoid sparks when the two contact. In addition, when the surface of the clamp block 25 is excessively worn, the friction plate 6 arranged in the concave direction contacts the guide rail to brake the elevator.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An explosion-proof safety clamp, characterized in that: include: An upper shell (1), a lower shell (2) and a protective plate (3) integrally formed with the lower shell (2), a fixing member being provided between the upper shell (1) and the lower shell (2), a sliding groove being provided on one side of the upper shell (1), two symmetrically arranged limit blocks (21) being slidably connected to the inner wall of the sliding groove, a screw hole 1 being provided on one side of the limit block (21), and a plurality of screw holes 2 being provided on both sides of the limit block (21); A U-shaped connecting plate (17) is provided between the protective plate (3) and the limiting block (21); a connecting piece matching the U-shaped connecting plate (17) and the limiting block (21) is provided on the surface of the protective plate (3); clamping plates (14) are provided on both sides of the limiting block (21); and a connecting bolt (15) matching the clamping plate (14) is threadedly connected to the inner wall of the second screw hole; A flow guide is provided between the clamping plate (14) and the limit block (21), a sliding block (23) is provided on the surface of the flow guide, a screw hole three is provided on the surface of the sliding block (23), a clamp block (25) is provided on one side of the sliding block (23), a connecting bolt four (26) matching the clamp block (25) is threadedly connected to the inner wall of the screw hole three, an opening is provided on the outer surface of the sliding block (23), a shaft tube (24) is fixedly connected to the inner wall of the opening, a rotating shaft one (12) is rotatably connected to the inner wall of the shaft tube (24), and an L-shaped pulling plate (7) is fixedly connected to the surface of the rotating shaft one (12); Two sets of dustproof parts are fixedly connected to the surface of the L-shaped pulling plate (7).

2. An explosion-proof safety clamp according to claim 1, characterized in that: The fixing member comprises a fixing hole 1, a connecting base block (5), a connecting bolt 1 (4) and a nut 1 (16) threadedly connected to the outer surface of the connecting bolt 1 (4); There are a plurality of fixing holes one, and the fixing holes one are respectively opened on the surface of the upper shell (1) and the lower shell (2), and a through hole matching the connecting bolt one (4) is opened on the surface of the connecting base block (5).

3. The explosion-proof safety clamp according to claim 1, characterized in that: The connecting member comprises a connecting hole formed on the surface of the protective plate (3), a clamping hole formed on the surface of the U-shaped connecting plate (17), a fixing screw (19) formed on the inner wall of the connecting hole, and a nut (20) threadedly connected to the surface of the fixing screw (19); A portion of the fixing screw (19) is located inside the clamping hole and is used to fix the U-shaped connecting plate (17); one end of the surface of the fixing screw (19) is threadedly connected to one of the screw holes.

4. The explosion-proof safety clamp according to claim 1, characterized in that: The flow guide member comprises a limit frame (28) arranged on the inner wall of the clamping plate (14) and a plurality of rotating shafts (22) rotatably connected to the inner wall of the limit frame (28); The second rotating shaft (22) is in contact with a sliding block (23), and the sliding block (23) is slidably connected to the clamping plate (14).

5. The explosion-proof safety clamp according to claim 1, characterized in that: The dustproof member comprises a connecting frame (8) arranged on the surface of the L-shaped pulling plate (7), four screw holes opened on the surface of the L-shaped pulling plate (7), two connecting bolts (9) threadedly connected to the inner wall of the four screw holes, and a filter screen (10) fixedly connected to one side of the connecting frame (8); The filter screen (10) undergoes a predetermined deformation when subjected to a predetermined force.

6. The explosion-proof safety clamp according to claim 1, characterized in that: A clamping block (13) that matches the limiting block (21) is fixedly connected to the inner wall of the protection plate (3), and a limiting groove that matches the limiting block (21) is formed on the surface of the clamping block (13).

7. An explosion-proof safety clamp according to claim 6, characterized in that: A third screw hole is provided on one side of the U-shaped connecting plate (17), a second fixing hole is provided on the surface of the clamping block (13), and a fixing bolt (18) matching the third screw hole is provided on the inner wall of the second fixing hole.

8. The explosion-proof safety clamp according to claim 1, characterized in that: A steel wire rope (11) is fixedly connected to the surface of the sliding block (23), and a sleeve (27) matching the steel wire rope (11) is fixedly connected to one side of the L-shaped pulling plate (7).

9. The explosion-proof safety clamp according to claim 1, characterized in that: The clamp block (25) is made of beryllium bronze, a mounting groove is provided on one side of the clamp block (25), a friction plate (6) is fixedly connected to the inner wall of the mounting groove, and two symmetrically arranged guide plates (29) are provided on the surface of the upper housing (1).