Buffer device of elevator safety tongs

Abstract

The utility model relates to the technical field of elevator safety tongs, in particular to a buffer device of elevator safety tongs, which comprises a safety tongs shell, guide rail grooves penetrating through the safety tongs shell are symmetrically arranged at the upper end and the lower end of the safety tongs shell, and brake blocks fixedly connected with the inner side of the safety tongs shell are symmetrically arranged on the inner side of the safety tongs shell. A brake shoe tightly attached to the brake block is arranged on one side of the brake block, a horizontally-arranged linkage rod is fixedly connected to one side of the brake shoe, a tensioning device is connected to the end, away from the brake shoe, of the linkage rod in a sliding mode, and a vertically-arranged movable rod is fixedly connected to the top end of the tensioning device. By arranging the guide rail groove, the brake block, the brake shoe, the linkage rod, the tensioning device, the movable rod, the fixed plate, the sliding rod, the sealing cylinder, the piston, the oil conveying pipe and the hydraulic oil pump, the braking distance can be properly increased, the braking time can be properly prolonged, and the situation that passengers fall down due to sudden braking is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety clamps, in particular to a buffer device for an elevator safety clamp. Background Art

[0002] The elevator safety clamp is an important elevator safety device. Its main function is to provide emergency braking to protect passengers and prevent equipment damage when abnormal situations occur during the operation of the elevator, such as elevator car overspeed, car slipping or wire rope breakage. The safety clamp must comply with relevant international standards and regulations and must undergo rigorous testing and certification before it can be put into use. It provides effective protection for the safe operation of the elevator and is generally installed on the car frame or counterweight frame.

[0003] Although the existing elevator safety clamps are widely used, they still have some shortcomings. For example, when the safety clamps brake the car, they usually directly lock the car to prevent the car from continuing to fall. There is no buffer device during the braking process. Sudden braking can easily cause passengers to fall, which is quite dangerous. The friction plate on the outside of the brake shoe involved in braking will cause its friction to decrease after use, and the friction plate needs to be replaced. The replacement of the existing friction plate is rather troublesome. Therefore, a buffer device for an elevator safety clamp is proposed to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a buffer device for an elevator safety clamp to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A buffer device for an elevator safety clamp comprises a safety clamp housing, wherein guide rail grooves penetrating the safety clamp housing are symmetrically arranged at the upper and lower ends of the safety clamp housing, a brake block fixedly connected to the inner side of the safety clamp housing is symmetrically arranged on the inner side of the safety clamp housing, a brake shoe tightly fitted with the brake block is arranged on one side of the brake shoe, a horizontally arranged linkage rod is fixedly connected to one side of the brake shoe, an end of the linkage rod away from the brake shoe is slidably connected to a tensioning device, a vertically arranged movable rod is fixedly connected to the top of the tensioning device, a horizontally arranged fixed plate is fixedly connected to the top of the movable rod, sliding rods fixedly connected to the bottom end of the fixed plate are symmetrically arranged on both sides of the movable rod, a sealing cylinder is arranged on the outer side of the sliding rod, a piston fixedly connected to the bottom end of the sliding rod is arranged on the inner side of the sealing cylinder, an oil pipe horizontally arranged and communicating with the sealing cylinder is fixedly connected to the outer side of the sealing cylinder, and a hydraulic oil pump communicating with the oil pipe is fixedly connected to the end of the oil pipe away from the sealing cylinder.

[0007] Preferably, a horizontally arranged snap-fit ​​groove is provided on one side of the brake shoe, a snap-fit ​​block is snap-connected on the inner side of the snap-fit ​​groove, a friction plate is fixedly connected on the side of the snap-fit ​​block away from the brake shoe, thread grooves are symmetrically provided on the upper and lower ends of the brake shoe, circular holes that penetrate the friction plate and are aligned with the thread grooves are symmetrically provided on the upper and lower ends of the friction plate, and screws that are spirally connected to the thread grooves are provided on the inner side of the circular holes.

[0008] Preferably, there are a plurality of the engaging grooves, and the engaging grooves are evenly distributed on one side of the brake shoe, and the outer side of the brake shoe is tightly fitted with the inner side of the friction plate.

[0009] Preferably, the sliding rod and the sealing cylinder are connected in a sliding manner, and the outer side of the piston is tightly fitted with the inner side of the sealing cylinder.

[0010] Preferably, the bottom end of the sealing cylinder is fixedly connected to the top end of the safety gear housing, and the bottom end of the hydraulic oil pump is fixedly connected to the top end of the safety gear housing.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the guide rail groove, brake block, brake shoe, linkage rod, tensioning device, movable rod, fixed plate, sliding rod, sealing cylinder, piston, oil pipeline and hydraulic oil pump are provided, which can appropriately increase the braking distance, appropriately prolong the braking time, and prevent passengers from falling due to sudden braking. The equipment is powered on before use. When the elevator is operating normally, the safety clamp housing slides on the outer side of the guide rail. The guide rail groove and tensioning device can ensure that the safety clamp housing does not affect the operation of the elevator. When the elevator speed limiter detects that the elevator is overspeeding, the hydraulic oil pump is started, and the hydraulic oil pump introduces the internal hydraulic oil into the inner side of the sealing cylinder through the oil pipeline. The hydraulic oil squeezes the piston to make the sliding rod slide upward on the inner side of the sealing cylinder, thereby driving the fixed plate, movable rod, tensioning device, linkage rod and brake shoe to rise, and the two brake shoes are close to each other. Since the hydraulic oil pump has a more precise control over the hydraulic oil, the friction plate gradually fits closely with the outer side of the guide rail, thereby braking the elevator;

[0013] 2. In the utility model, the engaging groove, engaging block, friction plate, threaded groove, round hole and screw are provided, so that the replacement of the friction plate on the outer side of the brake shoe is more convenient. When the friction plate needs to be replaced, the screw is unscrewed and taken out from the inner side of the round hole, and then the friction plate is pulled out to make the engaging block disengage from the engaging groove, and the engaging block on the new friction plate is removed and inserted into the inner side of the engaging groove, so that the threaded groove and the round hole are aligned, and the screw is inserted into the inner side of the round hole and screwed into the inner side of the threaded groove, and the friction plate can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall front structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall rear structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the sealing cylinder of the utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure of the tensioning device of the utility model;

[0018] Figure 5 It is a schematic diagram of the disassembled structure of the brake shoe of the utility model.

[0019] In the figure: 1. Safety clamp housing; 2. Guide groove; 3. Brake block; 4. Brake shoe; 5. Linkage rod; 6. Tensioning device; 7. Movable rod; 8. Fixed plate; 9. Sliding rod; 10. Sealing cylinder; 11. Piston; 12. Oil pipeline; 13. Hydraulic oil pump; 14. Engagement groove; 15. Engagement block; 16. Friction plate; 17. Threaded groove; 18. Round hole; 19. Screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in 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 in 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.

[0021] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0023] See also Figure 1-5 , the utility model provides a technical solution:

[0024] A buffer device for an elevator safety clamp comprises a safety clamp housing 1, wherein guide rail grooves 2 penetrating the safety clamp housing 1 are symmetrically arranged at the upper and lower ends of the safety clamp housing 1, brake blocks 3 fixedly connected to the inner side of the safety clamp housing 1 are symmetrically arranged on the inner side of the safety clamp housing 1, a brake shoe 4 tightly fitted with the brake block 3 is arranged on one side of the brake shoe 3, a horizontally arranged linkage rod 5 is fixedly connected to one side of the brake shoe 4, a tensioning device 6 is slidably connected to the end of the linkage rod 5 away from the brake shoe 4, a vertically arranged movable rod 7 is fixedly connected to the top of the tensioning device 6, a horizontally arranged fixed plate 8 is fixedly connected to the top of the movable rod 7, sliding rods 9 fixedly connected to the bottom end of the fixed plate 8 are symmetrically arranged on both sides of the movable rod 7, a sealing cylinder 10 is arranged on the outer side of the sliding rod 9, a piston 11 fixedly connected to the bottom end of the sliding rod 9 is arranged on the inner side of the sealing cylinder 10, an oil pipeline 12 horizontally arranged and communicating with the sealing cylinder 10 is fixedly connected to the outer side of the sealing cylinder 10, and a hydraulic oil pump 13 communicating with the oil pipeline 12 is fixedly connected to the end of the oil pipeline 12 away from the sealing cylinder 10.

[0025] A horizontally arranged snap-fit ​​groove 14 is provided on one side of the brake shoe 4, a snap-fit ​​block 15 is snap-fitted on the inner side of the snap-fit ​​groove 14, a friction plate 16 is fixedly connected on the side of the snap-fit ​​block 15 away from the brake shoe 4, thread grooves 17 are symmetrically provided on the upper and lower ends of the brake shoe 4, and circular holes 18 penetrating the friction plate 16 and aligned with the thread grooves 17 are symmetrically provided on the upper and lower ends of the friction plate 16, and screws 19 spirally connected to the thread grooves 17 are provided on the inner side of the circular holes 18. The snap-fit ​​block 15 and the snap-fit ​​groove 14 make it more convenient to align and install the friction plate 16. There are multiple snap-fit ​​grooves 14, and the snap-fit ​​grooves 14 are snap-fitted. The grooves 14 are evenly distributed on one side of the brake shoe 4, the outer side of the brake shoe 4 fits tightly with the inner side of the friction plate 16, and the inner side of the brake shoe 4 fits tightly with the outer side of the friction plate 16 to ensure the overall strength of the friction plate 16. The connection between the sliding rod 9 and the sealing cylinder 10 is a sliding connection, the outer side of the piston 11 fits tightly with the inner side of the sealing cylinder 10, and the outer side of the piston 11 fits tightly with the inner side of the sealing cylinder 10 to prevent the hydraulic oil from leaking from the piston 11. The bottom end of the sealing cylinder 10 is fixedly connected to the top end of the safety clamp housing 1, and the bottom end of the hydraulic oil pump 13 is fixedly connected to the top end of the safety clamp housing 1.

[0026] Working process: Power on the equipment before use. When the elevator is operating normally, the safety clamp housing 1 slides on the outside of the guide rail. The guide rail groove 2 and the tensioning device 6 can ensure that the safety clamp housing 1 does not affect the elevator operation. When the elevator speed limiter detects that the elevator is overspeeding, the hydraulic oil pump 13 is started. The hydraulic oil pump 13 introduces the internal hydraulic oil into the inner side of the sealing cylinder 10 through the oil pipe 12. The hydraulic oil squeezes the piston 11 to make the sliding rod 9 slide upward inside the sealing cylinder 10, thereby driving the fixed plate 8, the movable rod 7, the tensioning device 6, the linkage rod 5 and the brake shoe 4 to rise, and the two brake shoes 4 are close to each other. Due to the control of the hydraulic oil by the hydraulic oil pump 13 The system is relatively fine, so that the friction plate 16 gradually fits tightly against the outer side of the guide rail, and the brake block 3 fits tightly against the friction plate 16, thereby braking the elevator. This design can prolong the braking time and buffer the braking of the elevator. When the friction plate 16 needs to be replaced, the screw 19 is unscrewed and taken out from the inside of the round hole 18, and then the friction plate 16 is pulled out to disengage the engaging block 15 from the engaging groove 14, and the engaging block 15 on the new friction plate 16 is removed into the inside of the engaging groove 14, so that the thread groove 17 and the round hole 18 are aligned, and the screw 19 is inserted into the inside of the round hole 18 and screwed into the inside of the thread groove 17, and the replacement of the friction plate 16 can be completed.

[0027] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A buffer device for an elevator safety clamp, comprising a safety clamp housing (1), characterized in that: The upper and lower ends of the safety clamp housing (1) are symmetrically provided with guide rail grooves (2) penetrating the safety clamp housing (1); the inner side of the safety clamp housing (1) is symmetrically provided with brake blocks (3) fixedly connected to the inner side of the safety clamp housing (1); one side of the brake block (3) is provided with a brake shoe (4) tightly fitted with the brake block (3); one side of the brake shoe (4) is fixedly connected with a horizontally arranged linkage rod (5); the end of the linkage rod (5) away from the brake shoe (4) is slidably connected with a tensioning device (6); the top of the tensioning device (6) is fixedly connected with a vertically arranged movable rod (7); the movable rod (7) The top end is fixedly connected to a horizontally arranged fixed plate (8), and sliding rods (9) fixedly connected to the bottom end of the fixed plate (8) are symmetrically arranged on both sides of the movable rod (7), and a sealing cylinder (10) is arranged on the outside of the sliding rod (9), and a piston (11) fixedly connected to the bottom end of the sliding rod (9) is arranged on the inside of the sealing cylinder (10), and an oil pipe (12) arranged horizontally and connected to the sealing cylinder (10) is fixedly connected to the outside of the sealing cylinder (10), and a hydraulic oil pump (13) connected to the oil pipe (12) is fixedly connected to the end of the oil pipe (12) away from the sealing cylinder (10).

2. The buffer device of an elevator safety clamp according to claim 1, characterized in that: A horizontally arranged snap-fit ​​groove (14) is provided on one side of the brake shoe (4), a snap-fit ​​block (15) is snap-fitted to the inner side of the snap-fit ​​groove (14), a friction plate (16) is fixedly connected to the side of the snap-fit ​​block (15) away from the brake shoe (4), thread grooves (17) are symmetrically provided at the upper and lower ends of the brake shoe (4), circular holes (18) penetrating the friction plate (16) and aligned with the thread grooves (17) are symmetrically provided at the upper and lower ends of the friction plate (16), and a screw (19) spirally connected to the thread groove (17) is provided on the inner side of the circular hole (18).

3. The buffer device of an elevator safety clamp according to claim 2, characterized in that: There are a plurality of the engaging grooves (14), and the engaging grooves (14) are evenly distributed on one side of the brake shoe (4). The outer side of the brake shoe (4) is tightly fitted with the inner side of the friction plate (16).

4. The buffer device of an elevator safety clamp according to claim 1, characterized in that: The sliding rod (9) and the sealing cylinder (10) are connected in a sliding manner, and the outer side of the piston (11) is tightly fitted with the inner side of the sealing cylinder (10).

5. The buffer device of an elevator safety clamp according to claim 1, characterized in that: The bottom end of the sealing cylinder (10) is fixedly connected to the top end of the safety gear housing (1), and the bottom end of the hydraulic oil pump (13) is fixedly connected to the top end of the safety gear housing (1).

Images