Falling protector with hanging ring connected with locking teeth

Abstract

A falling protector with a hanging ring connected with a locking tooth is characterized in that a hanging ring opening and a rope outlet are formed in the top and the bottom of a shell, the hanging ring of a hanging ring assembly penetrates through the hanging ring opening, a hanging ring seat is combined at the bottom end of the hanging ring, the hanging ring seat is embedded in the top of the shell and connected with the locking tooth, and a main shaft and a rotating hub which is annularly sleeved on the main shaft and can rotate are fixed in the shell. A volute spiral spring is connected between the rotating hub and the main shaft, the rotating hub is combined with a rope body which is wound on the rotating hub in a multi-circle mode, the rope body penetrates out of the shell through the hanging ring opening, and a braking assembly is combined with an installation part on one side of the rotating hub and is configured to be meshed with the locking teeth; the locking teeth are arranged on the hanging ring assembly to be meshed with the braking assembly, a ratchet wheel for braking the rotating hub does not need to be arranged on the main shaft, the size of the falling protector can be reduced, and the production and manufacturing cost can be reduced through the simplified structure.

Description

Technical Field

[0001] This utility model relates to equipment for safety protection; in particular, it relates to a fall arrestor with a locking tooth for connecting a hanging ring. Background Technology

[0002] The existing fall arrestor has a main shaft fixed inside the shell, a hub rotatably connected to the main shaft and a ratchet fixed thereon, a braking component connected to one side of the hub, and a rope wrapped around the hub multiple times.

[0003] When using the aforementioned fall arrestor, the outer casing is fixed in one location, and one end of the rope passing through the casing is attached to a harness worn by the person. When the person wearing the harness falls from the air, the rope pulls, causing the internal hub of the fall arrestor to rotate rapidly. This causes the braking component engaged with the hub to change from a state of non-engagement with the ratchet to a state of engagement due to the centrifugal force of the rapid rotation. When the braking component engages with the ratchet, it prevents the hub from continuing to rotate and releasing the rope, thus preventing the person from continuing to fall and achieving a safe fall arrest effect.

[0004] While the existing fall arrestors do prevent people from falling, the ratchet and hub inside the fall arrestor are both mounted on the main shaft, which is fixed inside the outer casing. This design prevents the length of the main shaft and the volume of the outer casing from being reduced, thus failing to effectively miniaturize the fall arrestor. Utility Model Content

[0005] In view of this, the purpose of this utility model is to redesign the structure that allows the brake assembly next to the rotating hub to engage, so that the internal structure of the fall arrester is more streamlined, and the effect of reducing the size of the fall arrester and reducing the manufacturing cost can be achieved.

[0006] To achieve the above objectives, this utility model provides a fall arrestor with a locking tooth connecting a hanging ring, comprising a housing, a hanging ring assembly, and a fall arrestor body. The top of the housing has a hanging ring opening, and the bottom of the housing has a rope outlet. The interior of the housing has an installation space communicating with both the rope outlet and the hanging ring opening. A hanging ring seat groove is formed in the portion of the housing adjacent to the inner side of the hanging ring opening. The hanging ring assembly includes a hanging ring seat, a locking tooth, and a hanging ring. The hanging ring seat is fitted into the hanging ring seat groove; the locking tooth is connected to one side of the hanging ring seat; the middle of the hanging ring passes through the hanging ring opening and its inner end is engaged with the hanging ring seat. The fall arrestor body includes a main shaft, a hub, a spiral spring, a rope, and a braking assembly. The main shaft is fixed within the mounting space. The hub is rotatably fitted around the main shaft, and one side of the hub has a mounting portion with a spiral spring chamber inside. The spiral spring is disposed in the spiral spring chamber and connected between the main shaft and the hub. One end of the rope is attached to the hub and wound around the hub in multiple turns, and the other end of the rope extends out of the rope outlet. The braking assembly is attached to the mounting portion and configured to engage with the locking teeth.

[0007] The advantage of this invention lies in the fact that the locking teeth are provided on the lifting ring seat at the bottom of the lifting ring assembly, with the locking teeth located on the upper side of the mounting space. These locking teeth then engage with the braking assembly attached to one side of the rotating hub, thus creating a braking effect on the rotating hub and the rope extending from it. This eliminates the need for a ratchet on the inner side of the main shaft or the housing for the braking assembly to engage, reducing the length of the main shaft and the volume of the housing along the main shaft's extension direction. Besides miniaturizing the invention, the structure of having the rotating hub and braking assembly only around the main shaft simplifies the internal structure of the housing, further reducing manufacturing costs. Attached Figure Description

[0008] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0009] Figure 2 This is an exploded view of the preferred embodiment of the present invention.

[0010] Figure 3 for Figure 2 An exploded view of the hub and brake assembly.

[0011] Figure 4 This is a left-side view of the preferred embodiment of the present invention.

[0012] Figure 5 for Figure 4A sectional view along the 5-5 direction.

[0013] Figure 6 This is a front view of the preferred embodiment of the present invention.

[0014] Figure 7 for Figure 6 A sectional view along the 7-7 direction.

[0015] Figure 8 for Figure 6 A sectional view along the 8-8 direction.

[0016] Figure 9 for Figure 8 A schematic diagram of the action of the pawl block rotating from the middle to the top engaging with the locking teeth.

[0017] Explanation of reference numerals in the attached figures:

[0018] 100: Fall arrestor with locking teeth connected to the eyelet

[0019] 10: Outer shell

[0020] 10A: Half-shell

[0021] 12: Sidewall

[0022] 14: Zhou Bi

[0023] 16: Eye ring opening

[0024] 161: Ring notch

[0025] 162: Positioning flange

[0026] 163: Eyepiece seat groove

[0027] 18: Rope Exit

[0028] 181: Notch for threading rope

[0029] 182: Guide Ring

[0030] 20: Lifting ring assembly

[0031] 22: Hanging ring seat

[0032] 221: Top plate

[0033] 222: Enclosure

[0034] 223: Eyebolt seat hole

[0035] 24: Locking teeth

[0036] 26: Rings

[0037] 261: Pole section

[0038] 2611: Positioning trench

[0039] 2612: Fastening flange

[0040] 2613: Internal insertion pin hole

[0041] 262: Ring section

[0042] 2621: Protruding ears

[0043] 2622: External pin hole

[0044] 263: Pin

[0045] 30: Fall arrestor body

[0046] 31: Rope body

[0047] 32: Bracket

[0048] 321: Disc Body

[0049] 322: Through hole

[0050] 33: Braking components

[0051] 33A: Ratchet Block

[0052] 331: Base

[0053] 3311: Shaft

[0054] 332: Body

[0055] 3321: Thorn Claw

[0056] 3322: Spring Groove

[0057] 333: Return spring

[0058] 34: Spindle

[0059] 341: End

[0060] 342: Screw hole

[0061] 35: Fixing screws

[0062] 351: Head

[0063] 36: Hub

[0064] 361: Rope Groove

[0065] 362: Scroll Spring Chamber

[0066] 363: Installation surface

[0067] 364: In-slot disc embedding

[0068] 365: Limiting Block

[0069] 37: Installation Department

[0070] 37A: Fixed plate

[0071] 371: External Market

[0072] 371A: Fixed disc shaft hole

[0073] 372: Inner plate

[0074] 3721: Limiting groove

[0075] 373: Ratchet Groove

[0076] 374: Sidewall

[0077] 375: Inner wall

[0078] 3751: Spring bottom groove

[0079] 376: Shaft hole

[0080] 38: Spiral Spring

[0081] L: Axial direction

[0082] P1: First position

[0083] P2: Second position

[0084] S: Installation space Detailed Implementation

[0085] 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 to 5 As shown, a preferred embodiment of the present invention is a fall arrestor 100 with a locking tooth for connecting a hanging ring. It includes a housing 10, a hanging ring assembly 20, and a fall arrestor body 30. The hanging ring assembly 20 is attached to the housing 10, and the fall arrestor body 30 is installed inside the housing 10. Based on the arrangement of suspending the housing 10 and the fall arrestor body 30 at a certain location via the hanging ring assembly 20, the two sides of the housing 10 corresponding to the upper and lower directions are respectively referred to as the top side and the bottom side. The following description follows according to the directions defined above.

[0086] The outer casing 10 includes two half-shells 10A and has an internal mounting space S. The two half-shells 10A are connected by screws, making them detachable. In other preferred embodiments, the two half-shells 10A can also be connected by hooks or latches. Each half-shell 10A has a side wall 12 and a peripheral wall 14 connected to the side wall 12, with the two side walls 12 facing each other. A lifting ring recess 161 is formed at the top edge of each peripheral wall 14. The two lifting ring recesses 161 are semi-circular and merge to form a lifting ring opening 16, which communicates with the mounting space S and has a positioning flange 162 on its periphery. A lifting ring seat groove 163 is formed on the portion of the top of the mounting space S adjacent to the inner side of the lifting ring opening 16. A rope-threading notch 181 is formed at the bottom edge of each of the peripheral walls 14. The two rope-threading notches 181 are combined to form a rope outlet 18. The rope outlet 18 communicates with the installation space S. A guide ring 182 is fixed at the periphery of the rope outlet 18.

[0087] The eyelet assembly 20 includes an eyelet seat 22, a locking tooth 24, and an eyelet 26. The eyelet seat 22 is fitted into the eyelet seat groove 163 of the outer casing 10. The eyelet seat 22 has a top plate 221 and a surrounding plate 222 connected around the top plate 221. The top plate 221 has an eyelet seat hole 223 in the center, located directly below the eyelet opening 16. The locking tooth 24 is a ratchet and is connected to one side of the eyelet seat 22; specifically, the locking tooth 24 is connected to one side of the surrounding plate 222.

[0088] The lifting ring 26 includes a rod portion 261, a ring portion 262, and a pin 263. The rod portion 261 passes through the lifting ring opening 16 and has a positioning groove 2611 around it. The positioning flange 162 around the lifting ring opening 16 is embedded in the positioning groove 2611, thereby fixing the position of the rod portion 261. The bottom end of the rod portion 261 passes through the lifting ring seat hole 223 of the lifting ring seat 22, and a fastening flange 2612 is formed around the bottom end of the rod portion 261. The fastening flange 2612 abuts against the periphery of the bottom end of the lifting ring seat hole 223. The top end of the rod portion 261 passes laterally through an inner pin hole 2613. The ring portion 262 is inverted C-shaped and has two lugs 2621 on both sides. An outer pin hole 2622 passes through the two lugs 2621. The pin 263 passes through the outer pin hole 2622 and the inner pin hole 2613 for fixation.

[0089] The fall arrestor body 30 includes a bracket 32, a main shaft 34, a hub 36, a spiral spring 38, a rope 31, and a braking assembly 33. The bracket 32 ​​includes two discs 321, each with a hollowed-out perimeter and embedded in the center of each of the side walls 12 via injection molding. Each disc 321 has a through hole 322 in its center, penetrating each of the side walls 12. Both through holes 322 are non-circular. In other preferred embodiments, only one of the through holes 322 may be non-circular.

[0090] The axis of the spindle 34 extends in a direction defined as an axial direction L, which is perpendicular to the vertical direction. Each end of the spindle 34 has an end portion 341. The shape around each end portion 341 conforms to the shape of the corresponding through hole 322. Each end portion 341 is fitted into the through hole 322, and each end portion 341 has a screw hole 342 at its outer end. A fixing screw 35 is screwed into each screw hole 342. Each fixing screw 35 has a head 351, which abuts against the periphery of each through hole 322, thereby fixing the spindle 34 to the mounting space S of the housing 10, and preventing the spindle 34 from rotating relative to the housing 10.

[0091] The hub 36 is rotatably fitted around the main shaft 34. The hub 36 has a rope groove 361 around its periphery and a spiral spring chamber 362 inside. The hub 36 has a mounting part 37 on one side corresponding to the two sides in the axial direction L. The mounting part 37 includes a mounting surface 363 and a fixing plate 37A screwed into the mounting surface 363. The mounting surface 363 has an inner disc groove 364 in the middle, and a limiting block 365 is located on the inner surface of the inner disc groove 364. The fixed disk 37A has an outer disk 371 and an inner disk 372 connected sequentially along the axial direction L. The inner disk 372 is concentrically connected to the middle of the outer disk 371. The inner disk 372 is embedded in the inner disk groove 364 and has a limiting groove 3721. The limiting groove 3721 is fitted and fixed by the limiting block 365. The fixed disk 37A has a fixed disk shaft hole 371A in the center. The fixed disk shaft hole 371A passes through the center of the outer disk 371 and the inner disk 372 and is rotatably fitted onto the main shaft 34.

[0092] Please refer to Figure 3 and Figures 5 to 8As shown, the outer disk 371 of the fixed disk 37A forms two pawl grooves 373 in a circumferential and spaced arrangement. In this preferred embodiment, the two pawl grooves 373 are located on opposite sides around the main shaft 34. Each pawl groove 373 has one side adjacent to the mounting surface 363 along the axial direction L, and the other side has a sidewall 374. One side of each pawl groove 373 forms an inner wall 375, and the other side forms a spring bottom groove 3751. Each sidewall 374 has a pivot hole 376, which is located between each inner wall 375 and each spring bottom groove 3751, and each pivot hole 376 is adjacent to each inner wall 375.

[0093] The spiral spring 38 is disposed in the spiral spring chamber 362. The spiral spring 38 has two ends, one of which is connected to the main shaft 34, and the other end is connected to the hub 36. Therefore, when the hub 36 rotates relative to the main shaft 34, the spiral spring 38 provides a restoring force for the hub 36 to return to its original position. The rope 31 has two ends, one of which is connected to the hub 36. The rope 31 is accommodated in the rope groove 361 and is wound around the hub 36 in multiple turns. The other end of the rope groove 361 passes through the inner side of the guide ring 182 and exits the rope outlet 18 of the outer casing 10. When the rope 31 is pulled outward from the rope outlet 18 by an external force, the rope 31 will drive the hub 36 to rotate around the main shaft 34 as the rotation center. The rotation direction of the hub 36 at this time is defined as positive rotation. Conversely, when the pulling force that pulls the rope 31 outward no longer exists, the spiral spring 38 provides the restoring force for the hub 36 to rotate back to its original position. At this time, the hub 36 will rotate in the opposite direction and rewind the outward rope 31 back into the outer shell 10.

[0094] The braking assembly 33 includes pawl blocks 33A in number equal to the number of the plurality of pawl grooves 373. In this preferred embodiment, the braking assembly 33 includes two pawl blocks 33A. The plurality of pawl blocks 33A are respectively accommodated in each of the pawl grooves 373. Each pawl block 33A includes a base 331 and a body 332 connected together. Each base 331 has a pivot 3311, which is rotatably inserted through each of the pivot holes 376. Each body 332 abuts against each of the inner walls 375, and each body 332 forms a pawl 3321 and a spring groove 3322 on the sides corresponding to the forward and reverse rotation of the hub 36, respectively. Please refer to [reference needed]. Figure 3 and Figure 8As shown, a compressed return spring 333 is provided in each of the spring grooves 3322 and each of the spring bottom grooves 3751. Each of the return springs 333 keeps each of the pawl blocks 33A in a first position P1, that is, the position where each of the bodies 332 is close to each of the inner walls 375.

[0095] Please refer to Figure 5 and Figures 7 to 9 As shown, when the rope 31 is pulled outward and drives the hub 36 to rotate in the forward direction, if the rotation speed of the plurality of pawl blocks 33A of the braking assembly 33 exceeds a predetermined speed as the hub 36 rotates, the centrifugal force on each pawl block 33A exceeds the elastic force of each pawl block 33A being biased by each reset spring 333. At this time, each pawl block 33A will rotate around the axis 3311 as the rotation center to a second position P2. When each of the pawl blocks 33A is in the second position P2, each of the bodies 332 rotates outward from each of the inner walls 375 and each of the pawls 3321 extends outward from each of the pawl grooves 373. At this time, the trajectory of the plurality of pawls 3321 rotating with the hub 36 interferes with the position of the locking tooth 24, causing the pawl 3321 of one of the pawl blocks 33A that has rotated to the top to engage with the locking tooth 24, causing the hub 36 to stop rotating immediately. When the hub 36 stops rotating, it also stops releasing the rope 31 outward. At this time, the other pawl block 33A located below is pushed by the corresponding return spring 333, and thus returns from the second position P2 that has rotated outward to the first position P1.

[0096] The predetermined rotational speed setting for rotating the plurality of pawl blocks 33A from the first position P1 to the second position P2 is designed to complement the application scenario of this invention where the outer shell 10 is suspended at a fixed location by the lifting ring 26, and the other end of the rope 31, passing through the rope outlet 18, is connected to a harness worn by the human body. The predetermined rotational speed is generally set higher than the rotational speed at which the rope 31 is pulled outward from the rope outlet 18 by the movement of a person's hand or body, thereby driving the hub 36 to rotate; the predetermined rotational speed is lower than the rotational speed at which the hub 36 is driven to rotate by the rope 31 during a fall from the air. In this way, the fall arrestor 100 with the locking teeth of the hanging ring can prevent the human body from falling continuously when the human body falls from the air, but in normal state, the rope 31 can be pulled out by the human hand or the movement of the human body, and the hub 36 can roll back the rope 31 when the rope 31 is not pulled out continuously, so as not to hinder the user's movement when working.

[0097] The advantage of the preferred embodiment of this utility model is that, since the locking tooth 24 is provided on the lifting ring seat 22 at the bottom of the lifting ring assembly 20, the locking tooth 24 is located on the top side of the mounting space S and above the braking assembly 33. The locking tooth 24 is engaged with the braking assembly 33 connected to one side of the rotating hub 36, thereby producing a braking effect on the rotating hub 36. This structure eliminates the need for a ratchet or similar braking structure for the braking assembly 33 to engage around the main shaft 34 or inside the housing 10, compared to a structure that requires a ratchet to be located on the main shaft 34. This reduces the length of the main shaft 34 and the volume of the housing 10 along the axial direction L. In addition to miniaturizing the size of the fall arrester 100, simplifying the internal structure of the fall arrester 100 also helps to reduce manufacturing costs.

[0098] In addition to the preferred embodiment described above, in which two pawl grooves 373 are formed around the fixed disk 37A in a circumferential and spaced manner, and two pawl blocks 33A are provided in the two pawl grooves 373, in other preferred embodiments, three or more pawl grooves 373 may be formed around the fixed disk 37A in a circumferential and spaced manner, in which case the braking assembly 33 may provide three or more pawl blocks 33A in the three or more pawl grooves 373.

[0099] The above description is only a preferred and feasible embodiment of the present utility model. Any equivalent changes made by applying the present utility model specification and claims should be included within the patent scope of the present utility model.

Claims

1. A fall arrestor with a locking tooth connecting a hanging ring, characterized in that, include: A housing, the top of which has a lifting ring opening, the bottom of which has a rope outlet, and the interior of which has an installation space, the installation space communicating with the rope outlet and the lifting ring opening respectively, and the housing forming a lifting ring seat groove in the portion adjacent to the inner side of the lifting ring opening; A lifting ring assembly includes a lifting ring seat, a locking tooth, and a lifting ring; the lifting ring seat is fitted into a groove in the lifting ring seat; the locking tooth is connected to one side of the lifting ring seat; the middle of the lifting ring passes through the lifting ring opening and its inner end is engaged with the lifting ring seat; and A fall arrestor body includes a main shaft, a hub, a spiral spring, a rope, and a braking assembly; the main shaft is fixed within the mounting space; the hub is rotatably fitted around the main shaft, and one side of the hub has a mounting portion and an internal spiral spring chamber; the spiral spring is disposed in the spiral spring chamber and connected between the main shaft and the hub; one end of the rope is attached to the hub and wound around the hub in multiple turns, and the other end of the rope extends out of the rope outlet; the braking assembly is attached to the mounting portion and configured to engage with the locking teeth.

2. The fall arrestor with locking teeth for connecting the lifting ring as described in claim 1, characterized in that, The lifting ring has a positioning flange around its periphery; the lifting ring has a rod portion and a ring portion, the rod portion has a positioning groove around its periphery, the positioning flange is embedded in the positioning groove for fixation, the top of the rod portion has an inner pin hole extending laterally through it, the ring portion has two lugs on both sides, an outer pin hole is inserted through the two lugs, and a pin is fixed through the outer pin hole and the inner pin hole.

3. The fall arrestor with locking teeth for connecting the hanging ring as described in claim 2, characterized in that, The lifting ring seat has a top plate and a surrounding plate connected around the top plate. The top plate has a lifting ring seat hole in the middle. The bottom end of the rod passes through the lifting ring seat hole, and a fastening flange is formed around the bottom end of the rod. The fastening flange abuts against the periphery of the bottom end of the lifting ring seat hole.

4. The fall arrestor with locking teeth for connecting the hanging ring as described in claim 3, characterized in that, The outer shell includes two half-shells that are detachably connected; each half-shell has a lifting ring notch on its top side, and the two lifting ring notches of the two half-shells are merged to form the lifting ring opening; Each of the half-shells has a rope-threading notch on its bottom side, and the two rope-threading notches of the two half-shells are combined to form the rope outlet.

5. The fall arrestor with locking teeth for connecting the hanging ring as described in claim 4, characterized in that, Each of the semi-shells has a side wall and a peripheral wall connected to the side wall; each of the lifting ring recesses is formed on the edge of the top side of each of the peripheral walls; each of the rope threading recesses is formed on the edge of the bottom side of each of the peripheral walls.

6. The fall arrestor with locking teeth for connecting the lifting ring as described in claim 5, characterized in that, The fall arrestor body includes a bracket, which includes two discs. The two discs are respectively embedded in the middle of each of the side walls and have a through hole. At least one of the two through holes is a non-circular hole. The two ends of the main shaft are respectively formed into an end, each end being embedded in each of the through holes and having a screw hole. A fixing screw is screwed into each of the screw holes. Each fixing screw has a head, and each head abuts against the periphery of each of the through holes for fixation.

7. The fall arrestor with locking teeth for connecting the lifting ring as described in claim 1, characterized in that, The braking assembly includes a plurality of pawl blocks; each of the plurality of pawl blocks includes a base and a body connected together, the plurality of pawl blocks being pivotally connected to the periphery of the mounting portion through the plurality of bases in a circumferential and spaced arrangement, and each of the plurality of bodies of the plurality of pawl blocks having a pawl; a return spring is respectively provided between each of the pawl blocks and the mounting portion, and each return spring holds each of the pawl blocks in a first position; when the rotational speed of the plurality of pawl blocks as the hub rotates exceeds a predetermined speed, each of the pawl blocks rotates outward to a second position due to centrifugal force; when each of the pawl blocks is in the second position, the trajectory of the plurality of pawls moving with the rotation of the hub interferes with the position of the locking tooth, thereby enabling the pawl of one of the pawl blocks to engage with the locking tooth.

8. The fall arrestor with locking teeth for connecting the lifting ring as described in claim 7, characterized in that, The spindle has an axial direction; the mounting part includes a mounting surface and a fixed disk coupled to the mounting surface, the fixed disk has a fixed disk shaft hole in the center, the fixed disk shaft hole is rotatably fitted onto the spindle; a plurality of pawl grooves are formed around the fixed disk in a circumferential and spaced manner, each pawl groove has an inner wall on one side and a spring bottom groove on the other side; one side of each pawl groove along the axial direction is adjacent to the mounting surface, and the other side has a side wall; each side wall has a pivot hole, the pivot hole is located between the inner wall and the spring bottom groove; The plurality of pawl blocks are respectively accommodated in the respective pawl grooves. The base of each pawl block has a pivot, which is rotatably inserted through the respective pivot hole. Each pawl is formed on one side of each body, and a spring groove is formed on the other side of each body. Each return spring is compressed and disposed between the respective spring groove and the respective spring bottom groove. When each pawl block is in the first position, each body is close to the respective inner wall. When each pawl block is in the second position, each body is rotated outward from the respective inner wall and each pawl extends out of the respective pawl groove.

9. The fall arrestor with locking teeth for connecting the hanging ring as described in claim 8, characterized in that, The mounting surface has an inner disc groove in the middle; the fixing disc has an outer disc, and a plurality of pawl grooves are formed around the outer disc. An inner disc is connected to the middle of the outer disc, and the inner disc is embedded in the inner disc groove.

10. The fall arrestor with locking teeth for connecting the hanging ring as described in claim 9, characterized in that, The inner surface of the inner disc groove has a limiting block; the inner disc has a limiting groove, which is fitted and fixed to the limiting block.

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