CN111956967B

CN111956967B - Falling protector

Info

Publication number: CN111956967B
Application number: CN202010843522.3A
Authority: CN
Inventors: 赵甲佳; 王鹏; 周运波
Original assignee: Hangzhou Hetai Security Technology Co Ltd
Current assignee: Hangzhou Hetai Security Technology Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-11-05
Anticipated expiration: 2040-08-20
Also published as: CN111956967A

Abstract

The invention belongs to the technical field of safety guards, and particularly relates to a safety guard, which comprises a shell, an elastic sleeve, a steel wire rope, a hook, a winding wheel, a hanging ring, a ratchet wheel and a pawl, wherein when the ratchet wheel is blocked by the pawl, the steel wire rope released from the winding wheel extends out by a length a, and after the limit of the winding wheel and a rotating wheel is released, the winding wheel continues to rotate rapidly, so that a centrifugal block and a second limit block are blocked; the steel wire rope on the winding wheel is continuously released for a length b in the process; after the pawl and the ratchet wheel are locked, the steel wire rope can be quickly pulled out by a length b; no matter how fast the worker pulls the steel wire rope, the steel wire rope with the length b can be pulled out after the pawl and the ratchet wheel are locked, and the process is independent of the speed, so the normal use of the worker cannot be influenced. Compared with the traditional falling protector, a worker can quickly pull the steel wire rope, and the steel wire rope can extend out by a longer length, so that the worker can operate quickly.

Description

Falling protector

Technical Field

The invention belongs to the technical field of falling protectors, and particularly relates to a falling protector.

Background

The falling protector is also called a speed difference device, can quickly brake and lock falling objects within a limited distance, is suitable for hoisting goods, protects the life safety of ground operators and prevents the objects of the hoisted workpieces from being damaged; is a novel safety protection tool specially designed for preventing falling from high altitude for high altitude operation personnel.

When the safety hook is used, the nylon lifting rope only needs to cross over a structure with a firm blunt edge above, the lifting ring is removed from the safety hook, the automatic controller is hung above a user, the iron hook on the safety rope is hung in the semicircular ring on the safety belt, and the safety hook can be used. Under the action of the mechanism in the device, the safety rope is always in a semi-tense state, so that a user can work easily and freely without traction and hanging. Once the human body is fallen due to the loss of feet, the pulling-out speed of the safety rope is accelerated, the control system in the device automatically locks immediately, the falling of the safety rope is enabled to be not more than 0.2m, the impact force is less than 2942N, no harm is caused to the human body, the normal work can be recovered once the load is relieved, and the safety rope is automatically recovered into the device after the work is finished, so that the safety rope is convenient to carry.

The prior falling protector has the following problems in the use process:

when workers work, the workers can move rapidly, such as bend over or turn around, and when the workers perform the actions, the speed of pulling out the steel wire rope is too high, so that the falling protector is locked, and the using effect is influenced.

The design contradiction that the falling protector is inconvenient to use caused by locking after falling or unlocking when working quickly is considered, and no better solution exists at present; on the basis of considering more safety, the rapid movement is not required to occur in the work as far as possible, but the construction efficiency and the labor rhythm of workers are influenced.

The invention designs a falling protector to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a falling protector which is realized by adopting the following technical scheme.

A falling protector comprises a shell, an elastic sleeve, a steel wire rope, a hook, a winding wheel, a lifting ring, a ratchet wheel and a pawl, wherein the lifting ring is fixedly arranged at one end outside the shell, and the elastic sleeve is arranged at the other end outside the shell; the winding wheel is rotatably arranged in the shell, a steel wire rope is wound on the winding wheel, one end of the steel wire rope penetrates out of the shell and is positioned outside the shell through the elastic sleeve; one end of the steel wire rope positioned outside the shell is provided with a hook; the ratchet wheel is rotatably arranged in the shell, the pawl is arranged in the shell in a swinging mode, and two ends of the pawl are matched with the ratchet wheel; a plate spring and a limiting clamping block for limiting the pawl are arranged between the pawl and the shell; the method is characterized in that: the winding wheel is provided with a first rotating shaft and a second rotating shaft, and the winding wheel is rotatably arranged in the shell through the first rotating shaft and the second rotating shaft; one side of the winding wheel is provided with a rotating wheel in an embedded and rotating mode, a second volute spring is arranged between the rotating wheel and the first rotating shaft, and a first volute spring is arranged between the rotating wheel and the shell; the centrifugal mechanism is arranged on the first rotating shaft, the rotating wheel is provided with two first limiting blocks and a second limiting block, the second limiting block is positioned between the two first limiting blocks, the centrifugal mechanism comprises a centrifugal block, when the steel wire rope is not pulled out, the centrifugal block is contacted with one of the two first limiting blocks under the action of the second volute spring, and the sliding-out length of the centrifugal block and the second limiting block do not reach a matching state; the ratchet wheel is fixedly arranged on one side of the rotating wheel.

The mounting disc is slidably mounted on the second rotating shaft, a limiting strip is fixedly mounted on the mounting disc, and one end, far away from the mounting disc, of the limiting strip penetrates through the winding wheel to be in limiting fit with the rotating wheel; the transmission disc is slidably mounted on the second rotating shaft, the sliding disc is connected with the mounting disc through a T-shaped ring, one end of the T-shaped ring is fixedly mounted on the transmission disc, and the other end of the T-shaped ring is in rotating fit with the mounting disc; the pawl swings to drive the transmission disc to slide relative to the second rotating shaft through the connecting rod mechanism. The pawl is fixedly arranged on the third rotating shaft.

As a further improvement of the technology, a second fixed sleeve is arranged on the lower end face in the shell, and the lower end of the third rotating shaft is rotatably arranged in the second fixed sleeve.

As a further improvement of the technology, a first fixing sleeve is arranged on the upper end surface in the shell, and a third fixing sleeve is arranged on the lower end surface; the lower end of the first rotating shaft is rotatably arranged in the third fixed sleeve, and the upper end of the second rotating shaft is rotatably arranged in the first fixed sleeve.

As a further improvement of the technology, a fourth fixed sleeve is mounted on the lower end face in the shell, a nested ring is mounted at the lower end of the rotating wheel, and the nested ring is in rotating fit with the fourth fixed sleeve; the inner end of the first scroll spring is fixedly arranged on the outer circular surface of the third fixing sleeve, and the outer end of the first scroll spring is fixedly arranged on the inner circular surface of the nested ring.

As a further improvement of the technology, a third mounting groove is formed on the upper end surface of the rotating wheel, a shaft hole is formed on the lower end surface of the third mounting groove, a second mounting groove is formed on the circular surface of the shaft hole, and the shaft hole is matched with the first rotating shaft; the inner end of the second scroll spring is fixedly arranged on the outer circular surface of the first rotating shaft, and the outer end of the second scroll spring is fixedly arranged on the circular surface of the second mounting groove; the first limiting block and the second limiting block are installed on the bottom surface of the third installation groove.

The centrifugal mechanism comprises a mounting clamping sleeve, a return spring, a centrifugal sleeve and a centrifugal block, wherein the mounting clamping sleeve is fixedly mounted at one end of the centrifugal sleeve, and the centrifugal sleeve is fixedly mounted on the first rotating shaft through the mounting clamping sleeve and is positioned in the third mounting groove; one end of the centrifugal block is slidably arranged in the centrifugal sleeve, and a return spring is arranged between one end of the centrifugal block in the centrifugal sleeve and the inner end surface of the centrifugal sleeve; the centrifugal block is matched with the first limiting block and the second limiting block.

As a further improvement of the present technology, the upper end of the third rotating shaft has an inflection point, the upper end of the third rotating shaft is provided with a second connecting rod in a spherical hinge manner, one end of the first connecting rod is fixedly installed on the transmission disc, and the other end of the first connecting rod is connected with the other end of the second connecting rod in a spherical hinge manner.

As a further improvement of the technology, the winding wheel is provided with a first mounting groove for the rotating wheel to rotate and mount, and the inner end surface of the first mounting groove is provided with a square notch for the limiting strip to pass through.

As a further improvement of the technology, a clamping groove matched with the limiting strip is formed in the bottom surface of a third mounting groove formed in the rotating wheel.

As a further improvement of the present technique, the second scroll spring has a pre-pressure.

As a further improvement of the present technology, the return spring is an extension spring.

Compared with the traditional falling protector technology, the design of the invention has the following beneficial effects:

1. when the ratchet wheel is blocked by the pawl, the released steel wire rope on the winding wheel extends out by a length a, and after the limit of the winding wheel and the rotating wheel is released, the winding wheel continues to rotate rapidly, so that the centrifugal block and the second limiting block are blocked; the steel wire rope on the winding wheel is continuously released for a length b in the process; after the pawl and the ratchet wheel are locked, the steel wire rope can be quickly pulled out by a length b; no matter how fast the worker pulls the steel wire rope, the steel wire rope with the length b can be pulled out after the pawl and the ratchet wheel are locked, and the process is independent of the speed, so the normal use of the worker cannot be influenced. Compared with the traditional falling protector, a worker can quickly pull the steel wire rope, and the steel wire rope can extend out by a longer length, so that the worker can operate quickly.

2. The invention sets the falling amplitude as a + b, when a + b is smaller, on one hand, the invention can not cause great harm to people, and on the other hand, the invention can meet the amplitude required by bending down or turning over in the general rapid operation process.

3. The first limit block which is not matched with the centrifugal block in the initial state is designed to prevent the centrifugal block from being pulled out infinitely for a long time after the ratchet wheel and the pawl are locked and the speed of operation movement is reduced and the centrifugal block passes through the first limit block.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

Fig. 3 is a schematic view of the housing and hook installation.

Fig. 4 is a schematic view of the housing structure.

Fig. 5 is a schematic view of the internal structure of the housing.

Figure 6 is a schematic view of the wheel installation.

FIG. 7 is a schematic view of a centrifugal mechanism installation.

Fig. 8 is a schematic view of a winding wheel structure.

FIG. 9 is a schematic view of the ratchet and wheel installation.

FIG. 10 is a schematic view of the installation of the first connecting rod, the second connecting rod and the third rotating shaft.

Fig. 11 is a schematic view of the mounting of the check strip.

Number designation in the figures: 1. a housing; 2. an elastic sleeve; 3. a wire rope; 4. hooking; 5. a winding wheel; 6. a hoisting ring; 7. a first fixing sleeve; 8. a second fixing sleeve; 9. a third fixing sleeve; 10. a fourth fixing sleeve; 11. a ratchet wheel; 12. a first rotating shaft; 13. a first scroll spring; 14. a pawl; 15. a centrifugal mechanism; 16. a drive plate; 17. a second rotating shaft; 18. mounting a disc; 19. a second scroll spring; 20. a rotating wheel; 21. a first stopper; 22. a second limiting block; 23. installing a clamping sleeve; 24. a return spring; 25. a centrifugal sleeve; 26. a centrifugal block; 27. a square notch; 28. a first mounting groove; 29. a card slot; 30. a second mounting groove; 31. a shaft hole; 32. a third mounting groove; 33. nesting rings; 34. a first connecting rod; 35. a second connecting rod; 36. a third rotating shaft; 37. a plate spring; 38. a limiting clamping block; 39. a T-shaped ring; 40. and (5) a limiting strip.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and 2, the device comprises a shell 1, an elastic sleeve 2, a steel wire rope 3, a hook 4, a winding wheel 5, a hanging ring 6, a ratchet wheel 11 and a pawl 14, wherein as shown in fig. 3, the hanging ring 6 is fixedly arranged at one end outside the shell 1, and the elastic sleeve 2 is arranged at the other end outside the shell 1; the winding wheel 5 is rotatably installed in the shell 1, as shown in fig. 5, a steel wire rope 3 is wound on the winding wheel 5, one end of the steel wire rope 3 penetrates through the shell 1, and is located on the outer side of the shell 1 through the elastic sleeve 2; one end of the steel wire rope 3 positioned outside the shell 1 is provided with a hook 4; the ratchet wheel 11 is rotatably arranged in the shell 1, the pawl 14 is arranged in the shell 1 in a swinging mode, and two ends of the pawl 14 are matched with the ratchet wheel 11; a plate spring 37 and a limit clamping block 38 for limiting the pawl 14 are arranged between the pawl 14 and the shell 1; the method is characterized in that: as shown in fig. 8, the winding wheel 5 is provided with a first rotating shaft 12 and a second rotating shaft 17, and as shown in fig. 2, the winding wheel 5 is rotatably installed in the housing 1 through the first rotating shaft 12 and the second rotating shaft 17; as shown in fig. 6, a runner 20 is rotatably mounted on one side of the winding wheel 5 in a nested manner, a second spiral spring 19 is mounted between the runner 20 and the first rotating shaft 12, and a first spiral spring 13 is mounted between the runner 20 and the housing 1; as shown in fig. 7, the centrifugal mechanism 15 is mounted on the first rotating shaft 12, two first limiting blocks 21 and one second limiting block 22 are mounted on the rotating wheel 20, the second limiting block 22 is located between the two first limiting blocks 21, the centrifugal mechanism 15 includes a centrifugal block 26, when the steel wire rope 3 is not pulled out, the centrifugal block 26 contacts with one of the two first limiting blocks 21 under the action of the second volute spring 19, and the sliding length of the centrifugal block 26 and the second limiting block 22 do not reach the matching state; as shown in fig. 9, the ratchet wheel 11 is fixedly installed at one side of the wheel 20.

The structure and the installation relation of the shell 1, the elastic sleeve 2, the steel wire rope 3, the hook 4, the hanging ring 6, the ratchet wheel 11 and the pawl 14 in the invention are the same as those of the shell 1, the elastic sleeve 2, the steel wire rope 3, the hook 4, the hanging ring 6, the ratchet wheel 11 and the pawl 14 in the existing safety catcher, and the invention belongs to the prior art.

In the invention, when the ratchet wheel 11 is driven to rotate, the ratchet wheel 11 can stir one end of the pawl 14 to enable the pawl 14 to swing, when the rotating speed of the ratchet wheel 11 is relatively large, the stirring force of the ratchet wheel 11 on the pawl 14 is relatively increased, the swinging amplitude of the pawl 14 is relatively increased, the other end of the pawl 14 is matched with the ratchet wheel 11, and the ratchet wheel 11 extrudes the other end of the stirring pawl 14 through teeth on the ratchet wheel 11 to complete the locking of the pawl 14 and the ratchet wheel 11.

The plate spring 37 is used for providing pre-pressure for the pawl 14, so that one end of the pawl 14 and the ratchet wheel 11 are in a matched state in an initial state, and the pawl 14 can be stirred to swing in the rotation process of the ratchet wheel 11; the limiting fixture block 38 designed by the invention has the function of limiting the pawl 14 in the initial state, so that the phenomenon that the contact and matching area of the pawl 14 and the ratchet wheel 11 is too large under the action of the plate spring 37 in the initial state, and the ratchet wheel 11 cannot be smoothly separated from the pawl 14 in the rotating process to generate movement interference is avoided.

The first scroll spring 13 of the present invention acts to return the ratchet 11.

As shown in fig. 6, the mounting disc 18 is slidably mounted on the second rotating shaft 17, a limiting strip 40 is fixedly mounted on the mounting disc 18, and one end of the limiting strip 40, which is far away from the mounting disc 18, penetrates through the winding wheel 5 to be in limiting fit with the rotating wheel 20; the transmission disc 16 is slidably mounted on the second rotating shaft 17, as shown in fig. 11, the sliding disc is connected with the mounting disc 18 through a T-shaped ring 39, one end of the T-shaped ring 39 is fixedly mounted on the transmission disc 16, and the other end of the T-shaped ring 39 is rotatably fitted with the mounting disc 18; the pawl 14 swings to drive the transmission disc 16 to slide relative to the second rotating shaft 17 through the link mechanism.

The reason for the design of the rotational fit between the mounting plate 18 and the driving plate 16 of the present invention is to prevent the winding wheel 5 from interfering with the driving ring during the rotation of the driving mounting plate 18, and the driving ring cannot rotate because the driving ring is connected to the first connecting rod 34, the second connecting rod 35, and the third rotating shaft 36, and the first connecting rod 34, the second connecting rod 35, and the third rotating shaft 36 are stationary with respect to the winding wheel 5. The pawl is fixedly arranged on the third rotating shaft.

As shown in fig. 4, a second fixing sleeve 8 is mounted on the lower end surface in the housing 1, and as shown in fig. 6, the lower end of the third rotating shaft 36 is rotatably mounted in the second fixing sleeve 8.

As shown in fig. 4, a first fixing sleeve 7 is mounted on the upper end surface of the housing 1, and a third fixing sleeve 9 is mounted on the lower end surface; as shown in fig. 2, the lower end of the first rotating shaft 12 is rotatably mounted in the third stationary sleeve 9, and the upper end of the second rotating shaft 17 is rotatably mounted in the first stationary sleeve 7.

As shown in fig. 4, a fourth fixed sleeve 10 is mounted on the lower end surface in the housing 1, as shown in fig. 9, a nested ring 33 is mounted on the lower end of the runner 20, and the nested ring 33 is in rotating fit with the fourth fixed sleeve 10; as shown in fig. 6, the inner end of the first spiral spring 13 is fixedly mounted on the outer circumferential surface of the third fixing sleeve 9, and the outer end of the first spiral spring 13 is fixedly mounted on the inner circumferential surface of the nesting ring 33.

The invention envisages that the fourth sleeve 10 and the third sleeve 9 have the effect of increasing the stability of the rotating wheel 20 and of the winding wheel 5.

As shown in fig. 9, a third mounting groove 32 is formed on the upper end surface of the runner 20, a shaft hole 31 is formed on the lower end surface of the third mounting groove 32, a second mounting groove 30 is formed on the circular surface of the shaft hole 31, and the shaft hole 31 is matched with the first runner 12; the inner end of the second scroll spring 19 is fixedly installed on the outer circular surface of the first rotating shaft 12, and the outer end of the second scroll spring 19 is fixedly installed on the circular surface of the second installation groove 30; as shown in fig. 7, the first stopper 21 and the second stopper 22 are installed on the bottom surface of the third installation groove 32.

As shown in fig. 7, the centrifugal mechanism 15 includes an installation clamping sleeve 23, a return spring 24, a centrifugal sleeve 25, and a centrifugal block 26, wherein one end of the centrifugal sleeve 25 is fixedly installed with the installation clamping sleeve 23, and the centrifugal sleeve 25 is fixedly installed on the first rotating shaft 12 through the installation clamping sleeve 23 and is located in the third installation groove 32; one end of the centrifugal block 26 is slidably mounted in the centrifugal sleeve 25, and a return spring 24 is mounted between one end of the centrifugal block 26 positioned in the centrifugal sleeve 25 and the inner end surface of the centrifugal sleeve 25; the centrifugal block 26 is engaged with the first stopper 21 and the second stopper 22.

The second scroll spring 19 is designed to ensure that the fixture block and one of the two first limiting blocks 21 are in a tight state in an initial state; the second spiral spring 19 on the other hand has a restoring effect on the winding wheel 5.

As shown in fig. 10, the upper end of the third rotating shaft 36 has an inflection point, the upper end of the third rotating shaft 36 is provided with a second connecting rod 35 by means of a ball joint, one end of the first connecting rod 34 is fixedly installed on the transmission disc 16, and the other end of the first connecting rod 34 is connected with the other end of the second connecting rod 35 by means of a ball joint.

In the invention, when the third rotating shaft 36 rotates, the upper end part of the inflection point of the third rotating shaft 36 rotates around the axis of the lower end part of the inflection point of the third rotating shaft 36, the third rotating shaft 36 rotates to drive the second connecting rod 35 to swing, the second connecting rod 35 swings to drive the first connecting rod 34 to slide up and down, the first connecting rod 34 slides to drive the transmission disc 16 to slide, the transmission disc 16 slides to drive the mounting disc 18 to slide up and down through the T-shaped ring 39, the mounting disc 18 slides to drive the limiting strip 40 arranged on the mounting disc to slide, and further the rotation limiting between the winding wheel 5 and the rotating wheel 20 is controlled.

As shown in fig. 8, the winding wheel 5 has a first mounting groove 28 for rotatably mounting the rotating wheel 20, and the inner end surface of the first mounting groove 28 is provided with a square notch 27 for passing the limiting strip 40.

As shown in fig. 9, a clamping groove 29 matched with the limiting strip 40 is formed on the bottom surface of the third mounting groove 32 formed on the rotating wheel 20; when the lower end of the limiting strip 40 is matched with the clamping groove 29, the winding wheel 5 and the rotating wheel 20 are integrated in rotation; when the lower end of the limiting strip 40 is separated from the clamping groove 29, the winding wheel 5 and the rotating wheel 20 are released from the rotation limiting.

The second spiral spring 19 has a pre-pressure.

The return spring 24 is an extension spring.

The specific working process is as follows: when the anti-falling device designed by the invention is used, when the steel wire rope 3 is pulled out through the hook 4, the steel wire rope 3 can drive the winding wheel 5 to rotate, and because the lower end of the limiting strip 40 is positioned in the clamping groove 29 in the initial state, the winding wheel 5 and the rotating wheel 20 rotate integrally, the winding wheel 5 can drive the rotating wheel 20 to rotate through the limiting strip 40, the rotating wheel 20 rotates to drive the ratchet wheel 11 to rotate, the ratchet wheel 11 rotates to toggle the pawl 14 through the teeth on the ratchet wheel and the matched end of the ratchet wheel 11, and meanwhile, the first volute spiral spring 13 is compressed; therefore, after the falling protector is used, the steel wire rope 3 is consistently in a tight state in the moving process of a worker; but since the first scroll spring 13 has a small elastic coefficient, the first scroll spring 13 has a relatively weak traction force to the worker through the wire rope 3,

if in the using process, when a worker falls, the steel wire rope 3 is quickly pulled out, the winding wheel 5 rotates quickly, the winding wheel 5 rotates to drive the rotating wheel 20 to rotate through the limiting strip 40, and the rotating wheel 20 drives the ratchet wheel 11 to rotate quickly; during the rotation process, if the ratchet wheel 11 pulls the pawl 14 by a small amplitude, the limiting strip 40 is not separated from the clamping groove 29 when the other end of the pawl 14 is not matched and pressed by the teeth of the ratchet wheel 11; if the rotating speed of the ratchet wheel 11 is too fast, so that the swing amplitude of the pawl 14 is increased, the other end of the pawl 14 is matched with teeth on the ratchet wheel 11, namely, the teeth on the ratchet wheel 11 can extrude the pawl 14 to press the pawl 14 downwards as long as the other end of the pawl 14 is in point contact with the ratchet wheel 11; the downward pressure is equivalent to the gravity of a human body, so that the downward pressure is relatively large enough to overcome the resistance between the limiting strip 40 and the clamping groove 29 in the swinging process of the pawl 14; the pawl 14 swings when being pressed, the pawl 14 swings to drive the third rotating shaft 36 to rotate, when the third rotating shaft 36 rotates, the upper end part of the inflection point of the third rotating shaft 36 rotates around the axis of the lower end part of the inflection point of the third rotating shaft 36, the third rotating shaft 36 rotates to drive the second connecting rod 35 to swing, the second connecting rod 35 swings to drive the first connecting rod 34 to slide upwards, the first connecting rod 34 slides to drive the driving disc 16 to slide, the driving disc 16 slides to drive the mounting disc 18 to slide upwards through the T-shaped ring 39, the mounting disc 18 slides to drive the limiting strip 40 arranged on the mounting disc to slide, and the limiting of the winding wheel 5 and the rotating wheel 20 is released; after the ratchet wheel 11 and the pawl 14 are completely limited and clamped, the rotating speed of the winding wheel 5 is increased relative to the original speed along with the falling of a person; when the winding wheel 5 rotates, the first rotating shaft 12 drives the mounting clamping sleeve 23 to rotate, the mounting clamping sleeve 23 drives the centrifugal sleeve 25 to rotate, the centrifugal sleeve 25 rotates to drive the centrifugal block 26 to rotate, and the centrifugal block 26 moves outwards under stress; the outward movement of the centrifugal block 26 can be in contact fit with the second limiting block 22 in the state, the centrifugal block 26 is blocked, the rotating wheel 20 is limited and blocked by the pawl 14 at the moment, the winding wheel 5 is blocked and blocked by the rotating wheel 20 through the limitation of the centrifugal block 26 and the second limiting block 22, and therefore the winding wheel 5 is in the blocked state at the moment, the falling of the falling worker is blocked and cannot continue to fall, and the anti-falling effect is achieved.

When the ratchet wheel 11 is locked by the pawl 14, the released steel wire rope 3 on the winding wheel 5 extends out by a length a, and after the winding wheel 5 and the rotating wheel 20 are released from limiting, the winding wheel 5 continues to rotate rapidly, so that the centrifugal block 26 and the second limiting block 22 are locked; the steel wire rope 3 on the winding wheel 5 is continuously released for a length b in the process; after the pawl 14 and the ratchet wheel 11 are clamped, the steel wire rope 3 can be quickly pulled out by a length b; that is, no matter how fast the worker pulls the wire rope 3, the wire rope 3 having the length b after the pawl 14 and the ratchet 11 are stuck can be pulled out, and the process is independent of the speed, so the normal use of the worker is not affected. Compared with the traditional falling protector, a worker can quickly pull the steel wire rope 3, and the steel wire rope 3 can extend out by a longer length, so that the worker can operate quickly.

Claims

1. A falling protector comprises a shell, an elastic sleeve, a steel wire rope, a hook, a winding wheel, a lifting ring, a ratchet wheel and a pawl, wherein the lifting ring is fixedly arranged at one end outside the shell, and the elastic sleeve is arranged at the other end outside the shell; the winding wheel is rotatably arranged in the shell, a steel wire rope is wound on the winding wheel, one end of the steel wire rope penetrates out of the shell and is positioned outside the shell through the elastic sleeve; one end of the steel wire rope positioned outside the shell is provided with a hook; the ratchet wheel is rotatably arranged in the shell, the pawl is arranged in the shell in a swinging mode, and two ends of the pawl are matched with the ratchet wheel; a plate spring and a limiting clamping block for limiting the pawl are arranged between the pawl and the shell; the method is characterized in that: the winding wheel is provided with a first rotating shaft and a second rotating shaft, and the winding wheel is rotatably arranged in the shell through the first rotating shaft and the second rotating shaft; one side of the winding wheel is provided with a rotating wheel in an embedded and rotating mode, a second volute spring is arranged between the rotating wheel and the first rotating shaft, and a first volute spring is arranged between the rotating wheel and the shell; the centrifugal mechanism is arranged on the first rotating shaft, the rotating wheel is provided with two first limiting blocks and a second limiting block, the second limiting block is positioned between the two first limiting blocks, the centrifugal mechanism comprises a centrifugal block, when the steel wire rope is not pulled out, the centrifugal block is contacted with one of the two first limiting blocks under the action of the second volute spring, and the sliding-out length of the centrifugal block and the second limiting block do not reach a matching state; the ratchet wheel is fixedly arranged on one side of the rotating wheel;

the mounting disc is slidably mounted on the second rotating shaft, a limiting strip is fixedly mounted on the mounting disc, and one end, far away from the mounting disc, of the limiting strip penetrates through the winding wheel to be in limiting fit with the rotating wheel; the transmission disc is slidably mounted on the second rotating shaft, the sliding disc is connected with the mounting disc through a T-shaped ring, one end of the T-shaped ring is fixedly mounted on the transmission disc, and the other end of the T-shaped ring is in rotating fit with the mounting disc; the pawl swings to drive the transmission disc to slide relative to the second rotating shaft through the connecting rod mechanism;

the connecting rod mechanism comprises a third rotating shaft, a second connecting rod, a first connecting rod, an inflection point and a spherical hinge; the upper end of the third rotating shaft is provided with an inflection point, the upper end of the third rotating shaft is provided with a second connecting rod in a spherical hinge mode, one end of the first connecting rod is fixedly arranged on the transmission disc, and the other end of the first connecting rod is connected with the other end of the second connecting rod in a spherical hinge mode;

the rotating wheel rotates to drive the ratchet wheel to rotate; the pawl is fixedly arranged on the third rotating shaft.

2. The fall arrester of claim 1, wherein: and a second fixing sleeve is arranged on the lower end face in the shell, and the lower end of the third rotating shaft is rotatably arranged in the second fixing sleeve.

3. The fall arrester of claim 1, wherein: a first fixing sleeve is arranged on the upper end surface in the shell, and a third fixing sleeve is arranged on the lower end surface; the lower end of the first rotating shaft is rotatably arranged in the third fixed sleeve, and the upper end of the second rotating shaft is rotatably arranged in the first fixed sleeve.

4. A fall arrester according to claim 3 wherein: a fourth fixed sleeve is arranged on the lower end face in the shell, a nested ring is arranged at the lower end of the rotating wheel, and the nested ring is in rotating fit with the fourth fixed sleeve; the inner end of the first scroll spring is fixedly arranged on the outer circular surface of the third fixing sleeve, and the outer end of the first scroll spring is fixedly arranged on the inner circular surface of the nested ring.

5. The fall arrester of claim 1, wherein: the upper end surface of the rotating wheel is provided with a third mounting groove, the lower end surface of the third mounting groove is provided with a shaft hole, the round surface of the shaft hole is provided with a second mounting groove, and the shaft hole is matched with the first rotating shaft; the inner end of the second scroll spring is fixedly arranged on the outer circular surface of the first rotating shaft, and the outer end of the second scroll spring is fixedly arranged on the circular surface of the second mounting groove; the first limiting block and the second limiting block are arranged on the bottom surface of the third mounting groove;

6. The fall arrester of claim 1, wherein: the winding wheel is provided with a first mounting groove for the rotating wheel to rotate and mount, and the inner end face of the first mounting groove is provided with a square notch for the limiting strip to penetrate through.

7. The fall arrester of claim 5 wherein: and a clamping groove matched with the limiting strip is formed in the bottom surface of the third mounting groove formed in the rotating wheel.

8. The fall arrester of claim 1, wherein: the second scroll spring has a pre-pressure.

9. The fall arrester of claim 5 wherein: the return spring is an extension spring.