fall arrestor

Abstract

A kind of fall arrestor, including a shell, a rotating member, a brake disc and a brake assembly;The shell is formed with a containing space inside, the shell defines an axis line;Rotating member is rotatably arranged in the containing space of shell, rotating member includes a main shaft and a rotating hub, main shaft is arranged with axis line, rotating hub is fixed on main shaft;Brake disc is combined with main shaft, brake disc rotates coaxially with main shaft, brake disc has a first disc face and a second disc face on both sides;Brake assembly is combined with main shaft, so that brake assembly rotates coaxially with main shaft, brake assembly has a first brake pad and a second brake pad, first brake pad abuts on first disc face, second brake pad is fixed on rotating hub and abuts on second disc face, first brake pad and second brake pad are used to stop the rotation of brake disc, improve the brake performance of fall arrestor.

Description

Technical Field

[0001] This utility model relates to a safety device, specifically a fall arrestor that improves braking performance. Background Technology

[0002] When working at heights, construction workers usually wear fall arrestors, which are fixed to supports and the safety belts are worn on their bodies to prevent them from falling directly from heights and ensure their safety while working at heights.

[0003] The basic structure of an existing fall arrestor includes a shell, a rotating component, a safety belt, and a braking assembly. The shell forms an internal space, and the rotating component, the safety belt, and the braking assembly are respectively disposed in the internal space of the shell. The rotating component is rotatably disposed in the internal space, and the safety belt is wound around the rotating component. The braking assembly has a brake disc, brake pads, a brake block, and a stop. The brake disc and the brake pads are coupled to the rotating component, and the brake block is pivotally disposed on the brake disc.

[0004] When a construction worker accidentally falls, the safety belt will cause the rotating component to rotate rapidly. The rotating component will cause the brake disc to rotate. At this time, the brake block will be swung by centrifugal force and pivot, so that the brake block will engage with the stop component. The brake pads can limit the rotation speed of the brake disc, thus achieving the effect of preventing falls.

[0005] Traditional fall arrestors are typically equipped with a single brake pad, which can only apply friction braking to one side of the brake disc. This limits the friction force that the single brake pad can withstand when rotating at high speeds. When the worker is heavy or falls at excessive speed, the single brake pad may not be able to generate sufficient braking force on the brake disc, or even reduce the braking stability of the brake disc, thus affecting the braking performance and fall arrestor safety of the fall arrestor. Summary of the Invention

[0006] In view of this, the purpose of this utility model is to provide a fall arrestor that can improve the braking performance of the fall arrestor and enhance the braking stability of the brake disc.

[0007] To achieve the above objectives, the fall arrestor provided by this utility model includes a housing, a rotating component, a brake disc, and a brake assembly. The housing forms an accommodating space, and the inner side of the housing has a ratchet surface within the accommodating space. An axis is defined on the housing passing through the ratchet surface, and the ratchet surface is provided with a plurality of internal ratchet teeth surrounding the axis. The rotating component is rotatably disposed within the accommodating space of the housing. The rotating component includes a main shaft and a hub. The main shaft is arranged with the axis pointing towards the ratchet surface, and the hub is fitted onto the main shaft. The brake disc is disposed within the accommodating space of the housing, and the brake disc is coupled to the main shaft. The brake disc rotates coaxially with the main shaft, and the brake disc has a first disc surface and a second disc surface on both sides. The first disc faces the ratchet surface, and the second disc faces the hub. A pawl block and a counterweight spring are provided on the first disc surface of the brake disc. The pawl block is pivotally mounted on the first disc surface and located inside the plurality of internal ratchet teeth. The pawl block engages with each of the internal ratchet teeth. The counterweight spring is disposed between the first disc surface and the pawl block. The brake assembly is disposed in the receiving space of the housing. The brake assembly is coupled to the main shaft, allowing the brake assembly to rotate coaxially with the main shaft. The brake assembly has a first brake pad and a second brake pad. The first brake pad abuts against the first disc surface, and the second brake pad is fixed to the hub and abuts against the second disc surface. The first brake pad and the second brake pad are used to stop the rotation of the brake disc.

[0008] The advantage of this invention is that when the rotating component drives the brake disc to rotate rapidly, the pawl block of the brake disc overcomes the tension of the counterweight spring due to centrifugal force, causing the pawl block to pivot outward and engage with the multiple internal ratchet teeth. The brake disc is then forced to decelerate by the internal ratchet teeth of the housing. At this time, the first brake pad and the second brake pad respectively abut against the first and second disc surfaces of the brake disc, and apply clamping friction braking to the brake disc, providing immediate deceleration or stopping of the brake disc and the rotating component's rotation, thereby improving the overall braking performance of the fall arrestor. Furthermore, the first and second brake pads clamp the brake disc on both sides, enhancing the stability of the brake disc during braking, extending its service life, and ensuring the fall arrestor has a fall-prevention safety effect. Attached Figure Description

[0009] Figure 1 This is a perspective view of a preferred embodiment of the fall arrestor of this utility model.

[0010] Figure 2 This is an exploded view of the structure of a fall arrestor according to a preferred embodiment of the present invention.

[0011] Figure 3 This is an exploded view of the structure of a preferred embodiment of the fall arrestor of this utility model.

[0012] Figure 4 This is an exploded view of the rotating component, the brake disc, and the second brake pad in a preferred embodiment of the fall arrestor of this utility model.

[0013] Figure 5 yes Figure 4 The front view of the rotating component located inside the housing.

[0014] Figure 6 This is a structural diagram of the braking component in a preferred embodiment of the fall arrester of this utility model.

[0015] Figure 7 This is a front view of a preferred embodiment of the fall arrestor of this utility model.

[0016] Figure 8 This is a cross-sectional view of the housing and brake disc in a preferred embodiment of the fall arrestor of this utility model.

[0017] Figure 9 yes Figure 7 The cross-sectional view obtained along section line 9-9.

[0018] Figure 10 yes Figure 9 A partial large-scale image.

[0019] Explanation of reference numerals in the attached figures

[0020] 100: Fall arrestor

[0021] 10: Chassis

[0022] 11: Storage space

[0023] 12: Ratchet surface

[0024] 121: Internal ratchet

[0025] 13: First outer shell

[0026] 131: First shaft hole

[0027] 14: Second outer shell

[0028] 141: Second shaft hole

[0029] 20: Rotating component

[0030] 21: Spindle

[0031] 211: Shaft

[0032] 2111: First axle segment

[0033] 2112: Second axle segment

[0034] 212: Bushing

[0035] 2121: Threaded surface

[0036] 22: Hub

[0037] 221: First joint

[0038] 222: Second joint

[0039] 223: Lock Point

[0040] 23: Buckle

[0041] 24: Washers

[0042] 30: Brake disc

[0043] 31: First Plate

[0044] 32: Second Plate

[0045] 33: First container

[0046] 34: Second container

[0047] 35: convex ring

[0048] 36: Ratchet Block

[0049] 361: Central Ministry

[0050] 362: Ratchet

[0051] 37: Counterweight Spring

[0052] 40: Brake components

[0053] 41: First brake pad

[0054] 42: Second brake pad

[0055] 43: Brake ring

[0056] 431: Stop surface

[0057] 432: Stop

[0058] 44: Fixing ring

[0059] 441: Internal thread

[0060] 442: Radial hole

[0061] 45: Elastic ring

[0062] 46: Limiting ring

[0063] 461: Limiting hole

[0064] 462: Bump

[0065] 50: Scroll spring seat

[0066] 51: Winding Space

[0067] 52: Spiral Spring

[0068] 60: Rope body

[0069] 70: Screws

[0070] L: Centerline Detailed Implementation

[0071] To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figures 1-3 The fall arrestor 100 provided in a preferred embodiment of the present invention includes a housing 10, a rotating component 20, a brake disc 30, a brake assembly 40, a spiral spring seat 50, and a rope 60.

[0072] The housing 10 forms an accommodating space 11 inside, and the inner side of the housing 10 has a ratchet surface 12 within the accommodating space 11. The housing 10 defines an axis L passing through the ratchet surface 12. Figure 2 , 3 As shown, in this embodiment, the housing 10 has a first outer shell 13 and a second outer shell 14. The first outer shell 13 and the second outer shell 14 are aligned with the axis L to form the accommodating space 11. The inner side of the first outer shell 13 has the ratchet surface 12. The first outer shell 13 has a first shaft hole 131, and the second outer shell 14 has a second shaft hole 141. The first shaft hole 131 and the second shaft hole 141 are respectively arranged with the axis L, and the first shaft hole 131 penetrates the ratchet surface 12. The ratchet surface 12 is provided with a plurality of inner ratchet teeth 121, which surround the axis L.

[0073] The rotating component 20 is rotatably disposed in the receiving space 11 of the housing 10. The rotating component 20 includes a main shaft 21 and a hub 22. The main shaft 21 is arranged with the axis L facing the ratchet surface 12, and the hub 22 is fitted onto the main shaft 21. Figure 4 and 9As shown, in this embodiment, the main shaft 21 has a shaft 211 and a bushing 212. The shaft 211 is connected between the first housing 13 and the second housing 14. The shaft 211 includes a first shaft segment 2111 and a second shaft segment 2112. The first shaft segment 2111 and the second shaft segment 2112 are horizontally connected together. The first shaft segment 2111 is connected to the first shaft hole 131, and the second shaft segment 2112 is connected to the second shaft hole 141. The bushing 212 is fitted onto the first shaft segment 2111, and the outer side of the bushing 212 has a threaded surface 2121. The first shaft segment 2111 has a limiting groove (not shown in the figure). The limiting groove is located at the end of the first shaft segment 2111 and close to the ratchet surface 12. Figure 2 , 4 As shown in Figure 5, the main shaft 21 is provided with a retaining ring 23 and a washer 24 on the shaft 211. The retaining ring 23 is a C-shaped ring that fits into the limiting groove of the shaft 211. The washer 24 is fitted onto the shaft 211 and is clamped between the bushing 212 and the retaining ring 23 to prevent the bushing 212 from detaching from the shaft 211. Additionally, as shown in Figure 5... Figure 4 , 5 As shown in Figure 9, the hub 22 is fixed to the bushing 212. One side of the hub 22 has a first engagement portion 221, which is the ratchet surface 12 facing the first housing 13. The other side of the hub 22 has a second engagement portion 222, which is facing the second housing 14. The first engagement portion 221 has a plurality of locking points 223, which are arranged around the axis L.

[0074] The brake disc 30 is disposed in the receiving space 11 of the housing 10. The brake disc 30 is coupled to the main shaft 21 and rotates coaxially with the main shaft 21. The brake disc 30 has a first disc surface 31 and a second disc surface 32 on both sides. The first disc surface 31 faces the ratchet surface 12, and the second disc surface 32 faces the hub 22. Figure 2 , 4As shown in Figure 10, in this embodiment, the brake disc 30 is sleeved on the bushing 212 of the main shaft 21. The brake disc 30 has a first receiving groove 33, a second receiving groove 34, and a convex ring 35. The first receiving groove 33 and the second receiving groove 34 are respectively disposed on the first disc surface 31 and the second disc surface 32 with the axis L as the center line. The convex ring 35 is disposed on the first disc surface 31 with the axis L as the center line. The convex ring 35 surrounds the first receiving groove 33. The bottom of the first receiving groove 33 is equivalent to the first disc surface 31. The second receiving groove 34 is recessed in the second disc surface 32, and the bottom of the second receiving groove 34 is equivalent to the second disc surface 32.

[0075] In addition, such as Figure 2 and 8 As shown, the brake disc 30 has a plurality of pawl blocks 36 and a plurality of counterweight springs 37. The plurality of pawl blocks 36 and the plurality of counterweight springs 37 are located on the first disc surface 31 and surround the first receiving groove 33. Each pawl block 36 is connected to the outer periphery of the convex ring 35 and is located inside the plurality of inner ratchet teeth 121. Each pawl block 36 has a pivot portion 361 and a ratchet portion 362 at both ends. The pivot portion 361 is pivotally mounted on the first disc surface 31, and the ratchet portion 362 is detachable from the first disc surface 31. The pivot 361 swings, and the ratchet portion 362 engages with each of the inner ratchet teeth 121. The plurality of counterweight springs 37 are disposed between the first disc surface 31 and the plurality of pawl blocks 36. One end of each counterweight spring 37 is fixed to the first disc surface 31, while the other end of each counterweight spring 37 holds the ratchet portion 362 of each pawl block 36. When the fall arrester 100 is stationary, the ratchet portion 362 of the plurality of pawl blocks 36 maintains a distance from the tooth surface of the plurality of inner ratchet teeth 121. In other embodiments, the brake disc 30 can have its structure adjusted as needed. For example, the number of pawl blocks 36 and the number of counterweight springs 37 can each be at least one; the brake disc 30 can omit the first receiving groove 33, the second receiving groove 34, and the convex ring 35, as long as the plurality of pawl blocks 36 and the plurality of counterweight springs 37 are disposed on the first disc surface 31.

[0076] The brake assembly 40 is disposed in the receiving space 11 of the housing 10. The brake assembly 40 is coupled to the main shaft 21, so that the brake assembly 40 and the main shaft 21 rotate coaxially. The brake assembly 40 has a first brake pad 41 and a second brake pad 42. The first brake pad 41 abuts against the first disc surface 31 and is located in the first receiving groove 33. The second brake pad 42 is fixed on the rotating hub 22 and abuts against the second disc surface 32. The second brake pad 42 is locked on the plurality of locking points 223 of the first joint 221 and is limited in the second receiving groove 34. The first brake pad 41 and the second brake pad 42 are used to stop the rotation of the brake disc 30.

[0077] Specific explanations, such as Figure 2 , 4 As shown in Figures 6 and 9, in this embodiment, the brake assembly 40 has a brake ring 43, a fixing ring 44, an elastic ring 45, and a limiting ring 46. The brake ring 43, the elastic ring 45, and the limiting ring 46 are respectively located in the first receiving groove 33. The brake ring 43 abuts against the first brake pad 41. The brake ring 43 has a stop surface 431 facing the ratchet surface 12. The stop surface 431 is provided with a plurality of stops 432 arranged around the axis L. The fixing ring 44 engages with the main shaft 21 and clamps the brake ring 43, so that the first brake pad 41 is clamped between the brake ring 43 and the brake pad 44. Between the moving discs 30, the fixing ring 44 is a hexagonal ring body. The fixing ring 44 has an internal thread 441 and a plurality of radial holes 442. The internal thread 441 is screwed into the threaded surface 2121 of the bushing 212, so that the fixing ring 44 can be detachably fixed to the bushing 212 and pressed against the brake ring 43 by screwing. The plurality of radial holes 442 are provided through the outer side wall of the fixing ring 44 and communicate with the internal thread 441. The plurality of radial holes 442 allow a plurality of screws 70 to pass through and be fixed to the threaded surface 2121, thereby enhancing the bonding force of the fixing ring 44 to the bushing 212.

[0078] In addition, such as Figure 6 , 8As shown in Figure 9, the elastic ring 45 is sandwiched between the fixed ring 44 and the brake ring 43 to prevent the fixed ring 44 and the brake ring 43 from directly contacting each other and causing wear. The elastic ring 45 is pressed against the fixed ring 44 and continuously applies pressure to the brake ring 43, so that the brake ring 43 is stably pressed against the first brake pad 41. The limiting ring 46 abuts against the stop surface 431 of the brake ring 43 and surrounds the fixed ring 44 to prevent the fixed ring 44 from loosening. 46 has a limiting hole 461 through the axis L. The limiting hole 461 is a polygonal irregular hole. The fixing ring 44 is fitted in the limiting hole 461. The periphery of the limiting ring 46 has a plurality of protrusions 462 that laterally abut against the plurality of stops 432. When the first brake pad 41 brakes the brake disc 30, the protrusions 462 of the limiting ring 46 are locked in place by the stops 432 of the brake ring 43 to limit the rotational force of the brake ring 43 and improve the braking effect of the first brake pad 41.

[0079] The spiral spring seat 50 is disposed in the accommodating space 11 of the housing 10 and is coupled to the rotating member 20, such as Figure 3 and Figure 9 As shown, the scroll spring seat 50 is an annular box. The scroll spring seat 50 is fitted onto the main shaft 21 and is connected to the second connecting portion 222 of the hub 22, thereby bringing the scroll spring seat 50 close to the second outer shell 14. A winding space 51 is formed inside the scroll spring seat 50. The winding space 51 is a closed space and is not connected to the accommodating space 11. The inner wall of the scroll spring seat 50 has a slot (not shown). A scroll spring 52 is located within the winding space 51 of the scroll spring seat 50. One end of the spiral spring 52 is connected to the second shaft segment 2112 of the shaft 211, and the other end of the spiral spring 52 is inserted into the slot for fixation, so that the rotating part 20 is located between the brake disc 30 and the spiral spring seat 50; in other embodiments, the spiral spring seat 50 can be structurally modified as needed. For example, the winding space 51 of the spiral spring seat 50 can be an open space and connected to the accommodating space 11. When the spiral spring 52 is wound in the winding space 51, both ends of the spiral spring 52 can be fixed to the inner wall of the main shaft 21 and the second housing 14, or the spiral spring seat 50 can be omitted.

[0080] The rope 60 is disposed in the accommodating space 11 of the housing 10. One end of the rope 60 is connected to the hub 22 of the rotating member 20 and the rope 60 is wound around the hub 22. The other end of the rope 60 extends outward from the outside of the housing 10. The rope 60 is located between the brake disc 30 and the spiral spring seat 50, so that the rope 60 can be pulled by the outside to drive the rotating member 20, the brake disc 30 and the brake assembly 40 to rotate synchronously.

[0081] When the rope 60 is slowly pulled out of the housing 10 by an external force, the rope 60 drives the hub 22 to rotate coaxially. Since the main shaft 21 connects the hub 22, the brake disc 30 and the brake assembly 40, the brake disc 30 and the brake assembly 40 are also driven by the main shaft 21 to rotate together. At this time, under the pull of the multiple pawl blocks 36 of the brake disc 30, the ratchet portion 362 of each pawl block 36 is restricted and will not pivot, and the ratchet portion 362 of each pawl block 36 maintains a distance from the tooth surface of the multiple internal ratchet teeth 121.

[0082] When the rope 60 is pulled outward rapidly by an external force, the rotating hub 22 accelerates and drives the plurality of pawl blocks 36 of the brake disc 30 to exceed a predetermined speed. At this time, each pawl block 36 is subjected to the centrifugal force of the brake disc 30 to overcome the tension of each counterweight spring 37, causing the ratchet portion 362 of each pawl block 36 to pivot outward and engage with each of the inner ratchet teeth 121 of the ratchet surface 12. The brake disc 30 is restricted by the inner ratchet teeth 121 of the housing 10 and forced to decelerate. At this time, the first brake pad 41 and the second brake pad 42 respectively abut against the first disc surface 31 and the second disc surface 32 of the brake disc 30, thereby applying clamping friction braking to the brake disc 30, providing the effect of immediate deceleration or stopping the rotation of the brake disc 30 and the rotating member 20, thereby improving the overall braking performance of the fall arrestor 100.

[0083] In addition, the first brake pad 41 and the second brake pad 42 clamp the brake disc 30 on both sides, which improves the stability of the brake disc 30 during the braking process, thereby extending the service life of the brake disc 30 and ensuring that the fall arrestor 100 has a fall arrest safety effect.

[0084] The above description is only a preferred and feasible embodiment of this utility model. Any equivalent changes made by applying the specification and claims of this utility model should be included within the patent scope of this utility model.

Claims

1. A fall arrestor comprising: Include: A housing with an internal accommodating space, the inner side of the housing having a ratchet surface in the accommodating space, the housing defining an axis passing through the ratchet surface, the ratchet surface being provided with a plurality of inner ratchet teeth surrounding the axis. A rotating component is rotatably disposed in the receiving space of the housing. The rotating component includes a main shaft and a hub. The main shaft is arranged with the axis of rotation toward the ratchet surface, and the hub is sleeved on the main shaft. A brake disc is disposed in the receiving space of the housing. The brake disc is coupled to the main shaft and rotates coaxially with the main shaft. The brake disc has a first disc surface and a second disc surface on both sides. The first disc surface faces the ratchet tooth surface, and the second disc surface faces the hub. A pawl block and a counterweight spring are disposed on the first disc surface of the brake disc. The pawl block is pivotally mounted on the first disc surface and located inside the plurality of internal ratchet teeth. The pawl block engages with each of the internal ratchet teeth. The counterweight spring is disposed between the first disc surface and the pawl block. A brake assembly is disposed in the receiving space of the housing. The brake assembly is coupled to the main shaft, so that the brake assembly rotates coaxially with the main shaft. The brake assembly has a first brake pad and a second brake pad. The first brake pad abuts against the first disc surface, and the second brake pad is fixed on the hub and abuts against the second disc surface. The first brake pad and the second brake pad are used to stop the rotation of the brake disc.

2. The fall arrest device of claim 1, wherein, The brake assembly has a brake ring and a retaining ring. The brake ring abuts against the first brake pad and has a stop surface facing the ratchet surface. The retaining ring engages with the spindle and compresses the brake ring, so that the first brake pad is clamped between the brake ring and the brake disc.

3. The fall arrestor as described in claim 2, wherein, The brake assembly has a limiting ring that abuts against the stop surface of the brake ring and surrounds the fixed ring. The stop surface is provided with a plurality of blocks arranged around the axis. The limiting ring has a limiting hole through the axis. The fixed ring is fitted into the limiting hole. The periphery of the limiting ring is provided with a plurality of protrusions that laterally abut against the plurality of blocks.

4. The fall arrest device of claim 3, wherein, The main shaft has a shaft and a bushing. The shaft includes a first shaft segment, wherein the bushing is fitted onto the first shaft segment of the shaft, and the hub, the brake disc, and the brake assembly are respectively disposed on the bushing.

5. The fall arrestor as described in claim 4, wherein, The bushing has a threaded surface on its outer side, and the retaining ring has an internal thread that is screwed into the threaded surface of the bushing. The retaining ring also has multiple radial holes that pass through the outer wall of the retaining ring and communicate with the internal thread. The multiple radial holes allow multiple screws to pass through and be fixed to the threaded surface.

6. The fall arrestor as described in claim 4, wherein, The brake disc has a first groove, which is disposed on the surface of the first disc with the axis as the center line, and the first brake pad, the brake ring and the limiting ring are respectively located in the first groove.

7. The fall arrestor as described in claim 6, wherein, The ratchet blocks and the counterweight springs are in multiple quantities. The multiple ratchet blocks and the multiple counterweight springs surround the first receiving groove. Each ratchet block has a pivot portion and a ratchet tooth portion at both ends. The pivot portion is pivotally mounted on the first disk surface. One end of each counterweight spring is fixed to the first disk surface, and the other end of each counterweight spring is held by the ratchet tooth portion of each ratchet block.

8. The fall arrestor as described in claim 6, wherein, The hub has a first engagement portion facing the ratchet surface on one side, the second brake pad is locked in the first engagement portion, the brake disc has a second receiving groove, the second receiving groove is arranged on the second disc surface with the axis line, and the second brake pad is limited in the second receiving groove.

9. The fall arrestor as claimed in claim 8, wherein, It also includes a spiral spring seat, which is disposed in the accommodating space of the housing and connected to the rotating member. The other side of the hub has a second connecting part, and the spiral spring seat is connected to the second connecting part. A winding space is formed inside the spiral spring seat, and a slot is provided on the inner side wall of the spiral spring seat. The shaft includes a second shaft segment, and the first shaft segment and the second shaft segment are horizontally connected together. The spiral spring seat has a spiral spring in the winding space. One end of the spiral spring is connected to the second shaft segment of the shaft, and the other end of the spiral spring is inserted into the slot for fixation.

10. The fall arrest device of claim 4, wherein, The housing has a first outer shell and a second outer shell, which are aligned with each other along the axis to form the accommodating space. The inner side of the first outer shell has a ratchet surface, and the shaft is connected between the first outer shell and the second outer shell.

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