A buffer device for a fall arrestor

Abstract

The utility model discloses a kind of buffer devices for fall arresters, including hooks, first link rope and fall arrester body, one first link rope is fixedly connected with fall arrester body, another first link rope bottom end is fixedly connected with link block, link block bottom side is provided with receiving cylinder, limit block is set in receiving cylinder, air hole is set in receiving cylinder bottom side, the utility model is connected with the body of another hook by fall arrester body and one hook, then another hook is connected with the support point of work position, when falling occurs, limit block compression buffer spring, and contact buffer pad, to provide energy release, simultaneously by limit block cooperation receiving cylinder inner bottom side air hole form piston type structure, when link rod and limit block move down, receiving cylinder bottom side air is compressed, gas pressure rises, compressed air slowly discharges from small hole, further reduce piston movement speed gradually slow down, realize buffering effect, and reduce buffer spring damage probability, improve the service life of buffer spring.

Description

Technical Field

[0001] This utility model relates to the field of fall arrestor technology, specifically to a buffer device for fall arrestors. Background Technology

[0002] Fall arrestors are important safety devices that can quickly brake when a person or object falls, thereby effectively reducing the falling speed and impact force and protecting the life of the person.

[0003] Common fall arrestors are equipped with a cushioning structure in actual use. The purpose of this structure is to prevent injury when a person falls. In the event of a fall, the person's body will accelerate from a static state to a very high speed in a very short time, generating a great deal of kinetic energy. This kinetic energy can far exceed the limits that the human body can withstand, leading to injury. By releasing and absorbing the kinetic energy generated by the fall, the cushioning structure can greatly reduce the instantaneous impact force on the person's body, reduce the risk of injury, and prevent secondary injuries.

[0004] The most common cushioning structure used in fall arresters is a spring and a washer structure. In actual operation, the spring will continuously compress and extend. After a certain number of uses, the metal material of the spring will develop fatigue cracks, affecting the performance of the spring and causing the cushioning structure to lose its function and become unable to effectively reduce the impact force during a fall. Utility Model Content

[0005] In view of the deficiencies in the prior art, this utility model provides a buffer device for a fall arrestor to improve the service life of the spring and reduce the impact force of a fall.

[0006] The technical solution adopted by this utility model to solve the technical problem is as follows: a buffer device for a fall arrestor, including a hook, a first connecting rope, and a fall arrestor body. One of the first connecting ropes is fixedly connected to the fall arrestor body, and the bottom end of the other first connecting rope is fixedly connected to a connecting block. A receiving cylinder is provided on the bottom side of the connecting block, and a limiting block is provided inside the receiving cylinder. An air hole is opened on the bottom side of the receiving cylinder. Sealing rings are evenly fixedly connected to the limiting block. A connecting rod is fixedly connected to the bottom end of the limiting block. A buffer spring is sleeved on the outside of the connecting rod. The connecting rod is movably inserted into the bottom side of the receiving cylinder. An auxiliary block is fixedly connected to the bottom end of the connecting rod. A connecting ring is fixedly connected to the bottom end of the auxiliary block. A second connecting rope is sleeved on the bottom end of the connecting ring. The bottom side of the second connecting rope is fixedly connected to the upper side of the fall arrestor body. Two opposing first grooves are opened on the upper side of the receiving cylinder.

[0007] As a preferred technical solution of this utility model, the four mutually spaced sides of the receiving cylinder are threaded with pressure rods, and the pressure rods are inserted with connecting caps. The upper end of the connecting caps is fixedly connected to the bottom end of the connecting block. By setting the connecting caps in conjunction with the receiving cylinder, the connecting rods can be moved upward, thereby facilitating the disassembly of structures such as springs.

[0008] As a preferred technical solution of this utility model, an anti-detachment sleeve is attached to the outer side of the pressure rod, and a rubber ring is fixedly connected to the inner bottom side of the anti-detachment sleeve. The anti-detachment sleeve is located on the outer side of the connecting cover. By setting the anti-detachment sleeve and the rubber ring, the pressure rod can be limited, reducing the pressure rod loosening caused by structural shaking.

[0009] As a preferred technical solution of this utility model, a buffer pad is fixedly connected to the bottom side of the receiving cylinder. The buffer pad is made of rubber material. By setting the buffer pad, cushioning can be provided when the bottom end of the piston contacts the rubber pad.

[0010] As a preferred technical solution of this utility model, a protrusion is movably inserted into the receiving cylinder. The protrusion is fixedly connected to the connecting rod and contacts the buffer spring. By setting the protrusion, the contact surface between the connecting rod and the bottom side of the receiving cylinder can be increased, thereby improving the stability of the connecting rod's movement.

[0011] This invention has the following advantages: the fall arrestor body and one of its hooks connect to the person's body, and the other hook connects to the support structure of the working position. When a fall occurs, the limiting block compresses the buffer spring and contacts the buffer pad, thereby providing energy release. At the same time, the limiting block and the air hole on the bottom side of the receiving cylinder form a piston structure. When the connecting rod and the limiting block move down, the air on the bottom side of the receiving cylinder is compressed, the gas pressure increases, and the compressed air is slowly discharged from the small hole, further reducing the piston movement speed and gradually slowing down, thus achieving a buffering effect, reducing the probability of damage to the buffer spring, and increasing the service life of the buffer spring. Attached Figure Description

[0012] Figure 1 This is a side cross-sectional view of a preferred embodiment of the buffer device for a fall arrestor according to the present invention. Figure 2 This is a three-dimensional sectional view of the receiving cylinder of a buffer device for a fall arrestor according to a preferred embodiment of the present invention. Figure 3 This is an enlarged structural diagram of point A of a buffer device for a fall arrestor according to a preferred embodiment of this utility model.

[0013] Explanation of reference numerals in the attached drawings: 1. Hook; 2. First connecting rope; 3. Fall arrestor body; 4. Connecting block; 5. Receiving cylinder; 6. Limiting block; 7. Connecting rod; 8. Buffer spring; 9. Auxiliary block; 10. Connecting ring; 11. Second connecting rope; 12. First groove; 13. Air hole; 14. Sealing ring; 15. Connecting cover; 16. Pressure rod; 17. Anti-disengagement sleeve; 18. Rubber ring; 19. Buffer pad. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Please refer to the following: Figure 1-3 The illustrated cushioning device for a fall arrestor includes a hook 1, a first connecting rope 2, and a fall arrestor body 3. One of the first connecting ropes 2 is fixedly connected to the fall arrestor body 3, and another first connecting rope 2 is connected to the main support structure to facilitate personnel operation. Simultaneously, the other first connecting rope 2 is connected to the human body to provide fall protection in conjunction with the fall arrestor body 3. A connecting block 4 is fixedly connected to the bottom end of the other first connecting rope 2. A receiving cylinder 5 is provided on the bottom side of the connecting block 4, and a limit block 6 is provided inside the receiving cylinder 5. Figure 1 When a fall occurs, the bottom hook 1, the bottom first connecting rope 2, the fall arrestor body 3, and the second connecting rope 11 move downwards. The buffer spring 8 is compressed by the limiting block 6, causing the connecting rod 7 to move downwards and providing buffer protection. The bottom side of the receiving cylinder 5 has an air hole 13. Sealing rings 14, made of rubber, are evenly fixedly connected to the limiting block 6. The bottom end of the limiting block 6 is fixedly connected to the connecting rod 7. The buffer spring 8 is sleeved on the outside of the connecting rod 7. The connecting rod 7 is movably inserted into the bottom side of the receiving cylinder 5. The bottom end of the connecting rod 7 is fixedly connected to the auxiliary block 9. The bottom end of the auxiliary block 9 is fixedly connected to the connecting ring 10. The bottom end of the connecting ring 10 is sleeved with the second connecting rope 11. The bottom side of the second connecting rope 11 is fixedly connected to the upper side of the fall arrestor body 3. The upper side of the receiving cylinder 5 has two opposing first grooves 12. The sealing ring 14 is set inside the receiving cylinder 5 and contacts the receiving cylinder 5. When a fall occurs, the fall arrestor body 3 moves downward and pulls the second connecting rope 11, auxiliary block 9, connecting rod 7, and limiting block 6, causing the limiting block 6 and sealing ring 14 to gradually move to the bottom of the first groove 12 within the receiving cylinder 5. At this time, the air pressure between the limiting block 6 and the receiving cylinder 5 gradually increases. Due to the presence of the air hole 13, the compressed air can only be slowly discharged through the air hole 13. According to the principle of fluid mechanics, the gas will encounter resistance when passing through the air hole 13. The resistance hinders the downward movement of the limiting block 6 and sealing ring 14. As the limiting block 6 and sealing ring 14 continue to move downward, the reaction force generated by the compressed air continuously increases, forming a balance with the pressure acting on the limiting block 6 and sealing ring 14, thereby gradually slowing down the movement speed of the limiting block 6 and sealing ring 14, achieving further buffering, and also reducing the damage caused by the sudden contraction of the buffer spring 8.

[0016] The receiving cylinder 5 has four threaded connections on its four sides that are far apart from each other. The pressure rods 16 are inserted into the connecting cover 15. The upper end of the connecting cover 15 is fixedly connected to the bottom end of the connecting block 4. By setting the pressure rods 16, the connecting cover 15 can be connected to the receiving cylinder 5, so that there is enough space between the connecting cover 15 and the receiving cylinder 5, which is convenient for replacing the buffer spring 8.

[0017] The pressure rod 16 is connected to an anti-detachment sleeve 17 on its outer side. A rubber ring 18 is fixedly connected to the bottom inner side of the anti-detachment sleeve 17. The anti-detachment sleeve 17 is located on the outer side of the connecting cover 15. By setting the anti-detachment sleeve 17 to contact one end of the pressure rod 16 and cooperating with the rubber ring 18, when the rubber ring 18 is on the bottom side of the pressure rod 16, the rubber ring 18 can limit the bottom side of the pressure rod 16, while the inner wall of the anti-detachment sleeve 17 limits one end of the pressure rod 16, thereby preventing the pressure rod 16 from falling off.

[0018] Among them, the bottom inner side of the receiving cylinder 5 is fixedly connected (adhesive fixed) with a buffer pad 19, which is made of rubber material. By setting the buffer pad 19, it can work with the buffer spring 8 to provide energy release.

[0019] The receiving cylinder 5 has a protrusion that is movably inserted inside. The protrusion is fixedly connected to the connecting rod 7 and contacts the buffer spring 8. By setting the protrusion structure on the connecting rod 7, the contact surface between the bottom side of the receiving cylinder 5 and the connecting rod 7 is increased, thereby improving the stability of the movement of the connecting rod 7.

[0020] Working principle: One first connecting rope 2 connects to the main support structure to facilitate personnel work, while the other first connecting rope 2 connects to the human body, forming a connection between the human body and the support structure. Together with the fall arrestor body 3, it provides fall protection. When a fall occurs, the pressure of the human body on the buffer structure is instantaneous. The limiting block 6, in conjunction with the connecting rod 7 and the buffer spring 8, provides a buffering effect. Simultaneously, the limiting block 6 moves downwards, gradually moving to the bottom side of the first groove 12. At this point, the receiving cylinder 5 only has an air hole 13. As the limiting block 6, in conjunction with the sealing ring 14, gradually moves downwards, it compresses the air hole located between the limiting block 6 and the bottom side of the receiving cylinder 5. As the air is compressed, the gas pressure gradually increases. The compressed air can only be discharged through the air hole 13. According to the principles of fluid mechanics, the gas will encounter resistance when passing through the air hole 13. The resistance hinders the downward movement of the limiting block 6 and the sealing ring 14. However, the pressure from the human body will continue to push the limiting block 6 and the sealing ring 14 downward. The reaction force of the compressed air will continue to increase, forming a balance with the pressure acting on the limiting block 6 and the sealing ring 14. This will cause the movement speed of the limiting block 6 and the sealing ring 14 to continue to slow down. Finally, the bottom side of the limiting block 6 contacts the buffer pad 19, improving the buffering effect and changing the force state of the buffer spring 8, reducing damage.

[0021] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0022] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cushioning device for a fall arrester, comprising a hook (1), a first connecting rope (2), and a fall arrester body (3), wherein the first connecting rope (2) is fixedly connected to the fall arrester body (3), characterized in that, Another first connecting rope (2) is fixedly connected to a connecting block (4) at the bottom end. A receiving tube (5) is provided on the bottom side of the connecting block (4). A limiting block (6) is provided inside the receiving tube (5). An air hole (13) is opened on the bottom side of the receiving tube (5). A sealing ring (14) is evenly fixedly connected on the limiting block (6). A connecting rod (7) is fixedly connected to the bottom end of the limiting block (6). A buffer spring (8) is sleeved on the outside of the connecting rod (7). The connecting rod (7) is movably inserted into the bottom side of the receiving tube (5). An auxiliary block (9) is fixedly connected to the bottom end of the connecting rod (7). A connecting ring (10) is fixedly connected to the bottom end of the auxiliary block (9). A second connecting rope (11) is sleeved on the bottom end of the connecting ring (10). The bottom side of the second connecting rope (11) is fixedly connected to the upper side of the fall arrester body (3). Two opposing first grooves (12) are opened on the upper side of the receiving tube (5).

2. The cushioning device for a fall arrester as described in claim 1, characterized in that, The receiving cylinder (5) has four threaded connections on its four sides that are far apart from each other. The pressure rods (16) are inserted into the connecting cover (15), and the upper end of the connecting cover (15) is fixedly connected to the bottom end of the connecting block (4).

3. A cushioning device for a fall arrester as described in claim 2, characterized in that, The pressure rod (16) is connected to an anti-detachment sleeve (17) on the outside. A rubber ring (18) is fixedly connected to the bottom inner side of the anti-detachment sleeve (17). The anti-detachment sleeve (17) is located on the outside of the connecting cover (15).

4. A cushioning device for a fall arrester as described in claim 1, characterized in that, A buffer pad (19) is fixedly connected to the bottom inner side of the receiving cylinder (5), and the buffer pad (19) is made of rubber.

5. A cushioning device for a fall arrester as described in claim 4, characterized in that, The receiving cylinder (5) has a protrusion that is movably inserted inside. The protrusion is fixedly connected to the connecting rod (7) and is in contact with the buffer spring (8).

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