fall arrestor

Abstract

A kind of fall arrestor, including a box, a cover, a fixing frame, a rotating part, a rope, a brake disc and a brake assembly;Box interior is formed with a containing space, box has an opening and two positioning grooves, opening communicates the containing space, two positioning grooves are located at two positions of the inner wall of the periphery of opening;Cover closes the opening;Two ends of fixing frame are located in two positioning grooves respectively;Rotating part includes a main shaft, main shaft extends towards opening and penetrates fixing frame;Rope is wound rotating part, rope is pulled to drive main shaft rotation;Brake disc is located between rotating part and fixing frame, brake disc is combined with main shaft, brake disc rotates coaxially with main shaft;Brake assembly is sleeved with main shaft and combined with fixing frame, so that brake assembly is located between brake disc and fixing frame, to stop the rotation of brake disc.

Description

Technical Field

[0001] This utility model relates to a safety device, specifically a fall arrestor. 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 an outer shell, a support, a rotating component, a safety belt, and a braking assembly. The outer shell is formed by two half-shells joined together, creating an internal space. The support, the rotating component, the safety belt, and the braking assembly are respectively disposed within the internal space of the outer shell. The support has two opposing side plates, with at least one end of the two side plates connected. The rotating component is disposed between the two side plates, and the safety belt is wound around the rotating component. The braking assembly is disposed on the outside of one of the side plates of the support. The braking assembly has a brake disc, a brake block, and a stop. The brake disc is coupled to the rotating component, allowing the brake disc to rotate coaxially with the rotating component. The brake block is pivotally mounted on the brake disc.

[0004] When the construction worker accidentally falls, the safety belt will cause the rotating component to rotate rapidly. The rotating component will pull 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. In this way, the braking assembly can limit the rotation of the rotating component and achieve the effect of preventing falls.

[0005] However, in the actual assembly of traditional fall arresters, the rotating component and the brake assembly are usually fixed to the bracket first, and then the bracket, the rotating component, and the brake assembly are covered by the outer shell. Since the outer shell cannot provide effective limiting or support for the bracket, the positioning accuracy of the bracket inside the outer shell is reduced. When the brake assembly inside the fall arrester is damaged, the construction personnel must first open the outer shell and disassemble the brake assembly from the bracket before they can replace or repair the brake assembly, which reduces the efficiency of maintenance and assembly. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a fall arrestor that can improve the positioning accuracy of internal parts and improve assembly efficiency.

[0007] To achieve the above objectives, the fall arrestor provided by this utility model includes a housing, a cover, a fixing frame, a rotating component, a rope, a brake disc, and a brake assembly. The housing has an internal accommodating space, an opening, and two positioning grooves. The opening communicates with the accommodating space, and the two positioning grooves are located at two positions on the inner wall of the opening's periphery. The cover is placed over the housing and closes the opening. The fixing frame is disposed within the housing, with its two ends respectively confined within the two positioning grooves. The rotating component is rotatably disposed within the accommodating space of the housing. The rotating component includes a main shaft extending toward the opening and penetrating the fixed frame; a rope is disposed in the housing and wound around the rotating component, the rope being pulled to drive the main shaft to rotate; a brake disc is disposed in the receiving space of the housing, the brake disc being located between the rotating component and the fixed frame, the brake disc being coupled to the main shaft, and the brake disc rotating coaxially with the main shaft; a brake assembly is disposed in the receiving space of the housing, the brake assembly being sleeved on the main shaft and coupled to the fixed frame, the brake assembly being located between the brake disc and the fixed frame to stop the rotation of the brake disc.

[0008] The advantages of this invention are as follows: the opening of the housing in the fall arrestor is provided with a positioning groove, and the two ends of the fixing frame are respectively confined in the two positioning grooves, which increases the accuracy of the fixing frame's positioning in the housing space and avoids assembly errors. Furthermore, the rotating component, the brake disc, and the brake assembly have clear positioning and support within the housing, ensuring that the brake assembly can immediately and accurately stop the rotation of the brake disc when a worker falls, thus improving fall safety. When the brake assembly needs maintenance, the worker only needs to open the cover and disassemble the fixing frame to remove the brake assembly for maintenance and replacement, further improving maintenance and assembly efficiency. 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 a front view of a preferred embodiment of the fall arrestor of this utility model.

[0013] Figure 5This is a front view of the fall arrestor with the cover removed according to a preferred embodiment of the present invention.

[0014] Figure 6 yes Figure 4 The cross-sectional view obtained along section line 6-6.

[0015] Figure 7 yes Figure 6 A partial large-scale image.

[0016] Figure 8 This is a structural diagram of the braking component in a preferred embodiment of the fall arrester of this utility model.

[0017] Explanation of reference numerals in the attached figures

[0018] 100: Fall arrestor

[0019] 10: Box

[0020] 11: Storage space

[0021] 12: Opening

[0022] 13: Positioning groove

[0023] 131: Open lateral edge

[0024] 14: Storage section

[0025] 15: Side opening

[0026] 16: Cover plate

[0027] 17: Slot

[0028] 20: Capping

[0029] 21: Sealing ring

[0030] 22: Positioning groove

[0031] 30: Fixture

[0032] 31: End

[0033] 32: Joint

[0034] 321: Shaft hole

[0035] 40: Rotating component

[0036] 41: Spindle

[0037] 42: Hub

[0038] 43: Bearing

[0039] 50: Rope body

[0040] 60: Brake disc

[0041] 61: Market Overview

[0042] 62: Ratchet Block

[0043] 621: Ratchet

[0044] 622: Counterweight

[0045] 63: Counterweight Spring

[0046] 70: Scroll spring seat

[0047] 71: Spiral Spring

[0048] 80: Brake components

[0049] 81: Cam Shaft

[0050] 81a: Shaft

[0051] 81b: Chassis

[0052] 811: Mounting surface

[0053] 812: Threaded surface

[0054] 813: Through hole

[0055] 82: Brake pads

[0056] 83: Ratchet ring

[0057] 831: Brake ratchet

[0058] 84: Disc-shaped spring plate

[0059] 85: Fixing ring

[0060] 851: Internal thread

[0061] 852: Radial hole

[0062] 90: Screw

[0063] L: Centerline Detailed Implementation

[0064] 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 cover 20, a fixing frame 30, a rotating component 40, a rope 50, a brake disc 60, a spiral spring seat 70, and a brake assembly 80.

[0065] The housing 10 has an internal accommodating space 11. The housing 10 has an opening 12 and two positioning grooves 13. The opening 12 communicates with the accommodating space 11. The two positioning grooves 13 are located at two positions on the inner wall of the periphery of the opening 12. In this embodiment, as shown... Figure 2 , 3 As shown, the housing 10 has a receiving portion 14, a side opening 15, and a cover plate 16. The receiving portion 14 has the receiving space 11. One end of the receiving portion 14 has the opening 12 and the two positioning grooves 13. The side opening 15 is located at the other end of the receiving portion 14. The cover plate 16 detachably closes the side opening 15. A centerline L is defined in the center of the receiving portion 14, passing through the opening 12 and the side opening 15. The two positioning grooves 13 are arranged opposite to each other and surround the centerline L. Each positioning groove 13 has an open side edge 131 that connects to the opening 12.

[0066] In other embodiments, the structure of the box 10 can be modified as needed. For example, the accommodating part 14 of the box 10 can be designed to have the opening 12 on one side, while the other side of the accommodating part 14 is closed, so as to omit the side opening 15 and the cover plate 16, as long as the box 10 has the opening 12 connected to the accommodating space 11.

[0067] The cover 20 is placed on the box body 10 and closes the opening 12. The cover 20 has a sealing ring 21 on its inner side, and the sealing ring 21 is correspondingly attached to the open side edge 131 of the opening 12 and each of the positioning grooves 13.

[0068] The fixing bracket 30 is disposed at the opening 12 of the housing 10. The fixing bracket 30 has two ends 31, which are respectively confined in the two positioning grooves 13. In this embodiment, as shown... Figure 5 , 6 As shown, the fixing frame 30 is a long plate shape, and the two ends 31 are laterally embedded into the two positioning grooves 13 toward the open side edge 131. The sealing ring 21 of the cover 20 abuts against the two ends 31 of the fixing frame 30, so that the two ends 31 of the fixing frame 30 are respectively confined in the two positioning grooves 13. The fixing frame 30 has a connecting part 32, which is located between the two ends 31. The connecting part 32 has a shaft hole 321 corresponding to the position of the axis L.

[0069] The rotating component 40 is rotatably disposed in the accommodating space 11 of the housing 10. The rotating component 40 includes a main shaft 41, a hub 42, and a bearing 43. The main shaft 41 extends toward the opening 12 along the axis L. The main shaft 41 corresponds to the shaft hole 321 of the connecting part 32, and one end of the main shaft 41 penetrates the shaft hole 321 of the connecting part 32. The hub 42 is fitted onto the other end of the main shaft 41 and is close to the side opening 15. The bearing 43 is fitted onto the main shaft 41 and is located on the outside of the fixing frame 30. The cover 20 is provided with a positioning groove 22, and the bearing 43 is embedded in the positioning groove 22, which helps to stabilize the rotation of the main shaft 41.

[0070] The rope 50 is disposed in the accommodating space 11 of the housing 10. One end of the rope 50 is connected to the hub 42 of the rotating member 40, and the rope 50 is wound around the hub 42. The other end of the rope 50 extends outward from the outside of the housing 10, so that the rope 50 can be pulled by the outside to drive the main shaft 41 and the hub 42 to rotate synchronously.

[0071] The brake disc 60 is a disc body and is disposed in the accommodating space 11 of the housing 10. The brake disc 60 is located between the rotating member 40 and the fixed frame 30. The brake disc 60 is coupled to the main shaft 41 and can rotate coaxially with the main shaft 41. The brake disc 60 has a disc surface 61 facing the opening 12. The brake disc 60 is provided with two pawl blocks 62 and two counterweight springs 63. The two pawl blocks 62 are arranged around the axis L. The pawl block 62 is pivotally connected to the disk surface 61 in the middle. Each pawl block 62 has a ratchet portion 621 and a counterweight portion 622 at both ends. The two counterweight springs 63 are disposed between the disk surface 61 and the two pawl blocks 62. One end of each counterweight spring 63 is fixed to the disk surface 61, and the other end of each counterweight spring 63 is held by the counterweight portion 622 of each pawl block 62. In other embodiments, the number of pawl blocks 62 and the number of counterweight springs 63 can be at least one or more.

[0072] The spiral spring seat 70 is an annular body and is connected between the rotating member 40 and the brake disc 60. The spiral spring seat 70 is sleeved on the main shaft 41. The inner wall of the accommodating part 14 has a slot 17 adjacent to the periphery of the spiral spring seat 70. A spiral spring 71 is wound around the spiral spring seat 70. One end of the spiral spring 71 is connected to the main shaft 41, and the other end of the spiral spring 71 is inserted into the slot 17 of the accommodating part 14 for fixation, so that the spiral spring 71 is connected between the main shaft 41 and the housing 10. In other embodiments, the spiral spring seat 70 may be omitted.

[0073] The brake assembly 80 is disposed in the receiving space 11 of the housing 10. The brake assembly 80 is sleeved on the main shaft 41 and connected to the fixing frame 30. The brake assembly 80 is located inside the two pawl blocks 62, so that the brake assembly 80 is located between the brake disc 60 and the fixing frame 30 to prevent the rotation of the brake disc 60. Figure 5 , 7 As shown in Figure 8, in this embodiment, the brake assembly 80 includes a cam shaft 81, a brake pad 82, a ratchet ring 83, a disc spring plate 84, and a retaining ring 85. The cam shaft 81 is connected to the fixing frame 30. The cam shaft 81 has a shaft 81a and a base 81b. The shaft 81a is arranged along the axis L and has a mounting surface 811 and a threaded surface 812. The mounting surface 811 is located at one end of the shaft 81a and faces the fixing frame. The shaft 81a has a connecting portion 32, which is locked to the mounting surface 811. The threaded surface 812 surrounds the mounting surface 811. The shaft 81a has a through hole 813 on the mounting surface 811. The through hole 813 and the shaft hole 321 are coaxial along the axis L, and the through hole 813 communicates with the shaft hole 321. The main shaft 41 passes through the through hole 813 to penetrate the shaft hole 321. The base 81b is an annular body and is connected to the other end of the shaft 81a.

[0074] like Figure 7 , 8As shown, the brake pad 82, the ratchet ring 83, and the disc spring plate 84 are rotatably mounted on the cam shaft 81. In this embodiment, the brake pad 82 and the disc spring plate 84 abut against both sides of the ratchet ring 83, and the brake pad 82 is clamped between the ratchet ring 83 and the chassis 81b. A plurality of brake ratchet teeth 831 are arranged around the axial line L. The retaining ring 85 is coupled to the shaft 81a of the cam shaft 81 and abuts against the disc spring plate 84. The retaining ring 85 is a hexagonal ring and is detachably mounted on the cam shaft 81. The retaining ring 85 has an internal thread 851 that corresponds to the threaded surface 812 of the cam shaft 81, thereby allowing the retaining ring 85 to... The shaft 81a, which is screwed onto the cam shaft 81, is pressed against the disc spring plate 84. The disc spring plate 84 is compressed and sandwiched between the retaining ring 85 and the ratchet ring 83. The disc spring plate 84 applies a force to the ratchet ring 83, pressing it against the brake pad 82. The retaining ring 85 can adjust the compression of the disc spring plate 84 so that the rotation of the ratchet ring 83 relative to the shaft 81a is braked by the brake pad 82. The retaining ring 85 has multiple radial holes 852, which pass through the outer wall of the retaining ring 85 and communicate with the internal thread 851. The multiple radial holes 852 allow multiple screws 90 to pass through and be fixed to the threaded surface 812, thereby enhancing the bonding strength of the retaining ring 85 to the cam shaft 81.

[0075] When the fall arrestor 100 is stationary, the ratchet portion 621 and the counterweight portion 622 of each of the pawl blocks 62 maintain a distance from the tooth surface of the plurality of brake ratchet teeth 831. When the rope 50 is slowly pulled out of the housing 10 by an external force, the rope 50 drives the hub 42 to rotate coaxially. Since the main shaft 41 connects the hub 42 and the brake disc 60, the brake disc 60 is also driven by the main shaft 41 to rotate together. At this time, the brake assembly 80 is attached to the fixing frame 30, and the fixing frame 30 is limited by the two positioning grooves 13 of the housing 10, so that the brake assembly 80 will not be pulled by the main shaft 41 to rotate.

[0076] When the rope 50 is pulled outward rapidly by an external force, the rotational speed of the two pawl blocks 62 of the brake disc 60, which rotate with the hub 42, exceeds a predetermined speed. Each pawl block 62 is subjected to the centrifugal force of the brake disc 60 to overcome the tension of each counterweight spring 63, causing the ratchet portion 621 of each pawl block 62 to pivot and engage with each brake ratchet 831 of the ratchet ring 83. The brake disc 60 is restricted by the ratchet ring 83 and forced to decelerate. At this time, the rotating seat of the brake disc 60 is subjected to excessive force, which pulls the ratchet ring 83 and causes it to rotate. The brake pad 82 applies friction braking to the ratchet ring 83, providing the effect of decelerating or stopping the rotation of the brake disc 60 and the rotating member 40.

[0077] Therefore, the opening 12 of the housing 10 in the fall arrestor 100 is provided with a positioning groove 13, and the two ends 31 of the fixing frame 30 are respectively limited in the two positioning grooves 13, which increases the accuracy of the fixing frame 30 in the accommodating space 11 of the housing 10, avoids assembly errors, and the rotating part 40, the brake disc 60 and the brake assembly 80 have clear positioning and support in the housing 10, which can ensure that the brake assembly 80 can stop the rotation of the brake disc 60 immediately and accurately when the construction personnel fall, thus improving the fall arrest safety. Moreover, when the brake assembly 80 needs to be repaired, the construction personnel only need to open the cover 20 and disassemble the fixing frame 30 to take out the brake assembly 70 for repair and replacement, which further improves the repair and assembly efficiency.

[0078] 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, characterized in that, Include: A box body with an internal accommodating space, the box body having an opening and two positioning grooves, the opening communicating with the accommodating space, and the two positioning grooves located at two positions on the inner wall of the periphery of the opening; A lid is placed over the box and closes the opening; A fixing frame is disposed in the housing, and the two ends of the fixing frame are respectively confined in the two positioning grooves; A rotating component is rotatably disposed in the receiving space of the housing, the rotating component including a main shaft extending toward the opening and penetrating the fixing frame; A rope is provided on the box and wound around the rotating component; the rope is pulled to drive the main shaft to rotate. A brake disc is disposed in the receiving space of the housing, the brake disc is located between the rotating member and the fixed frame, the brake disc is coupled to the main shaft, and the brake disc rotates coaxially with the main shaft; and A brake assembly is disposed in the receiving space of the housing. The brake assembly is sleeved on the main shaft and connected to the fixing frame, so that the brake assembly is located between the brake disc and the fixing frame, for the purpose of stopping the rotation of the brake disc.

2. The fall arrestor as described in claim 1, wherein, Each of the positioning grooves has an open side edge that connects to the opening, the two ends are laterally embedded into the two positioning grooves toward the open side edge, and the cover abuts against the two ends.

3. The fall arrestor as described in claim 2, wherein, The brake assembly includes a cam shaft, a ratchet ring, a disc spring plate, a brake pad, and a retaining ring. The cam shaft is connected to the retaining frame. The ratchet ring, the disc spring plate, and the brake pad are sleeved on the cam shaft, and the disc spring plate and the brake pad are respectively located on both sides of the ratchet ring. The retaining ring is connected to the cam shaft and abuts against the disc spring plate.

4. The fall arrestor as described in claim 3, wherein, The fixing frame has a connecting part located between the two ends, the connecting part has a shaft hole corresponding to the position of the main shaft, the convex shaft has a mounting surface facing the connecting part, and the connecting part is locked to the mounting surface.

5. The fall arrestor as described in claim 4, wherein, The cam shaft has a shaft and a base. One end of the shaft has the mounting surface, and the shaft has a threaded surface surrounding the mounting surface. The base is disposed at the other end of the shaft. The brake pad is clamped between the ratchet ring and the base. The retaining ring has an internal thread that is screwed into the threaded surface of the shaft.

6. The fall arrestor as described in claim 5, wherein, The retaining ring 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.

7. The fall arrestor as described in claim 3, wherein, The ratchet ring is surrounded by multiple brake ratchet teeth. The brake disc has a pawl block and a counterweight spring. The pawl block is pivotally mounted on the brake disc. The two ends of the pawl block have a ratchet portion and a counterweight portion. The counterweight spring connects the brake disc and the counterweight portion. The brake assembly is located inside the pawl block. When the ratchet portion pivots toward the ratchet ring, the ratchet portion engages with each of the brake ratchet teeth of the ratchet ring.

8. The fall arrestor as claimed in claim 1, wherein, It also includes a spiral spring seat, which is sleeved on the main shaft and connected between the rotating component and the brake disc. The inner wall of the housing has a slot adjacent to the spiral spring seat. A spiral spring is wound around the spiral spring seat. One end of the spiral spring is connected to the main shaft, and the other end of the spiral spring is inserted into the slot for fixation, so that the spiral spring is connected between the main shaft and the housing.

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