A fall protection device with high impact resistance

Abstract

The utility model relates to the technical field of anti -fall device, especially strong anti -impact ability's anti -fall device, including winding mechanism and energy -absorbing mechanism, winding mechanism is used for the safe rope, winding mechanism is connected with the anti -fall mechanism for preventing winding mechanism rotation when the unwinding speed of winding mechanism is too fast, the safe rope is worn out on winding mechanism and is connected with the hook claw, the one end of safe rope is connected with energy -absorbing mechanism near the hook claw, energy -absorbing mechanism includes fixed shaft and reel, be equipped with the first spring piece for absorbing the falling impact force between fixed shaft and reel, fixed shaft, first spring piece and reel coaxial arrangement, the diameter of reel is less than the diameter of winding mechanism, the safe rope is housed in the reel in the way of multiple turns coiling. The utility model aims at realizing the high -efficient anti -falling, and slows down the impact force that user receives.

Description

Technical Field

[0001] This utility model relates to the field of fall arrestor technology, and in particular to a fall arrestor device with strong impact resistance. Background Technology

[0002] Fall arrestors provide a safety net for work at heights, protecting users in the event of a fall. They are a core safety protection device for workers operating at heights. Currently, most fall arrestors on the market have strong fall protection capabilities, stopping a falling user in less than a second. However, because of this high stopping efficiency, the connection structure between the fall arrestor and the user often bears a tremendous impact force during braking, potentially leading to other safety hazards or injury to the user. Utility Model Content

[0003] The main purpose of this invention is to provide a fall arrest device with strong impact resistance, which aims to achieve efficient fall prevention while reducing the impact force on the user.

[0004] To achieve the above objectives, this utility model proposes a fall arrestor with strong impact resistance, comprising a winding mechanism and an energy absorption mechanism.

[0005] The winding mechanism is used to wind up and unwind the safety rope, and the winding mechanism is connected to a fall arrest mechanism to prevent the winding mechanism from rotating when the unwinding speed of the winding mechanism is too fast.

[0006] The safety rope passes through the winding mechanism and is connected to a hook. An energy-absorbing mechanism is connected to one end of the safety rope near the hook.

[0007] The energy-absorbing mechanism includes a fixed shaft and a coil. A first spring is provided between the fixed shaft and the coil to absorb the impact force of a fall. The fixed shaft, the first spring, and the coil are coaxially arranged. The diameter of the coil is smaller than the diameter of the winding mechanism. The safety rope is housed in the coil in a multi-turn coiled manner.

[0008] In one embodiment of this application, the energy-absorbing mechanism further includes a housing, and the housing has a guide portion facing the mounting rope.

[0009] In one embodiment of this application, the housing is provided with at least two coils, each coil being connected to a first spring and a fixed shaft, the fixed shaft passing through the housing.

[0010] In one embodiment of this application, at least two limiting wheels are symmetrically arranged along the safety rope at one end of the housing near the guide portion. The limiting wheels are radially provided with limiting grooves facing the safety rope. The two limiting wheels are connected to each other, and the two limiting grooves enclose a limiting cavity for restricting the movement of the safety rope.

[0011] In one embodiment of this application, an abutment ring is provided in the limiting groove of the limiting wheel, and the abutment ring is connected to the safety rope.

[0012] In one embodiment of this application, the winding mechanism includes a housing, a stabilizing shaft, a second spring member, and a bobbin. One end of the housing faces the energy-absorbing mechanism and has a wire outlet end, while the other end has a mounting end. The stabilizing shaft passes through the inner cavity of the housing.

[0013] One end of the second spring is connected to the stabilizing shaft, and the other end is connected to the spool.

[0014] In one embodiment of this application, the fall protection mechanism includes transmission teeth and fall protection plates. The transmission teeth include a plurality of teeth, which are arranged in an array facing the stabilizing shaft on the side wall of the spool and surrounding the second spring member.

[0015] The transmission tooth has an abutment part on one side and a buffer part on the other side, and the buffer part of the previous transmission tooth is connected to the abutment part of the next transmission tooth.

[0016] The fall arrestor is rotatably connected to the stabilizing shaft and is located on the side wall of the spool. The fall arrestor has a limiting part on the side facing the abutment part and a connecting part on the side facing the buffer part. The distance between the connecting part and the stabilizing shaft is less than the distance between the limiting part and the stabilizing shaft.

[0017] In one embodiment of this application, the weight of the anti-fall plate on the side of the stabilizing shaft facing the limiting part is greater than the weight of the anti-fall plate on the side of the stabilizing shaft facing the connecting part, and the anti-fall plate connects the connecting part to the transmission gear under the action of gravity.

[0018] In one embodiment of this application, multiple transmission teeth are arrayed on both sides of the spool, and the transmission teeth on both sides of the spool face the same direction.

[0019] Two fall arrestors are symmetrically arranged on both sides of the spool, and each fall arrestor is rotatably connected to a stabilizing shaft.

[0020] By adopting the above technical solution, this utility model has the following advantages:

[0021] The winding mechanism of this application contains a metal safety rope made of metal material with impact resistance. The winding mechanism can achieve automatic winding function through damping, springs and other structures. The fall protection mechanism is connected to the winding mechanism and can jam the winding mechanism when the winding mechanism is unwinding too fast, preventing it from continuing to unwind and achieving a fast and stable fall protection effect.

[0022] The safety rope is equipped with a hook at its end, which can be used to connect to the user, making the connection between the user and the fall arrestor more stable. The energy-absorbing mechanism is located on the safety rope and near the hook. The energy-absorbing mechanism at the end of the safety rope can more stably absorb the kinetic energy at the end of the safety rope, protecting the user's safety. Moreover, its location at this position can also serve as a separation structure between the hook and the winding mechanism, preventing the safety rope from being completely wound back into the winding mechanism, and effectively improving the user's practical experience.

[0023] The energy-absorbing mechanism consists of a fixed shaft, a coil, and a first spring. The first spring is a structure made of steel sheet that has been fired and wound, possessing extremely strong elasticity. One end of the spring is connected to the coil, and the other end is connected to the fixed shaft. The safety rope is wound multiple times on the coil. With this structure, the safety rope on the coil will only be pulled when the hook is subjected to a great impact force, thus achieving the purpose of using the first spring to offset the impact force. The diameter of the coil is much smaller than that of the winding mechanism, which limits the length of the safety rope wound on the coil, thereby improving the fall protection effect, preventing users from falling too far, and reducing safety hazards. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the anti-fall device with strong impact resistance of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the anti-fall device with strong impact resistance of this utility model;

[0027] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0028] Figure 4 for Figure 2 A magnified view of a section at point B.

[0029] Explanation of icon numbers:

[0030] 1. Winding mechanism; 11. Housing; 12. Stabilizing shaft; 13. Second spring component; 14. Cable spool; 2. Safety rope; 3. Fall arrest mechanism; 4. Transmission gear; 41. Abutment part; 42. Buffer part; 5. Fall arrest plate; 51. Limiting part; 52. Connecting part; 6. Energy absorption mechanism; 61. Housing; 62. Guide part; 63. Fixed shaft; 64. First spring component; 65. Cable spool; 7. Limiting wheel; 71. Limiting groove; 72. Abutment ring; 8. Hook.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] The following is in conjunction with the appendix Figures 1 to 4 The present invention will be further described below.

[0034] To achieve the above objectives, this utility model proposes a fall arrestor with strong impact resistance, comprising a winding mechanism 1 and an energy absorption mechanism 6.

[0035] The winding mechanism 1 is used to wind up and unwind the safety rope 2. The winding mechanism 1 is connected to a fall arrest mechanism 3 to prevent the winding mechanism 1 from rotating when the unwinding speed of the winding mechanism 1 is too fast.

[0036] The safety rope 2 passes through the winding mechanism 1 and is connected to the hook 8. The end of the safety rope 2 near the hook 8 is connected to the energy absorption mechanism 6.

[0037] The energy-absorbing mechanism 6 includes a fixed shaft 63 and a coil 65. A first spring 64 for absorbing the impact force of falling is provided between the fixed shaft 63 and the coil 65. The fixed shaft 63, the first spring 64, and the coil 65 are coaxially arranged. The diameter of the coil 65 is smaller than the diameter of the winding mechanism 1. The safety rope 2 is housed in the coil 65 in a multi-turn coiled manner.

[0038] The winding mechanism 1 of this application has a metal safety rope 2 made of metal material with impact resistance wound inside. The winding mechanism 1 can realize the automatic winding function through damping, spring sheet and other structures. The fall protection mechanism 3 is connected to the winding mechanism 1 and can jam the winding mechanism 1 when the winding speed is too fast to prevent it from continuing to unwind the line, so as to achieve a fast and stable fall protection effect.

[0039] The safety rope 2 is equipped with a hook 8 at its end, which can be used to connect the user, making the connection between the user and the fall arrestor more stable. The energy absorption mechanism 6 is located on the safety rope 2 and is positioned near the hook 8. The energy absorption mechanism 6 located at the end of the safety rope 2 can more stably absorb the kinetic energy at the end of the safety rope 2, protecting the user's safety. Moreover, its position can serve as a separation structure between the hook 8 and the winding mechanism 1, preventing the safety rope 2 from being completely wound back into the winding mechanism 1, and effectively improving the user's practical experience.

[0040] The energy-absorbing mechanism 6 includes a fixed shaft 63, a coil 65, and a first spring 64. The first spring 64 is a structure made of steel sheet that has been fired and wound, and has extremely strong elasticity. One end of the spring 64 is connected to the coil 65, and the other end is connected to the fixed shaft 63. At the same time, the safety rope 2 is wound multiple times on the coil 65. With this structure, the safety rope 2 on the coil 65 will only be pulled when the hook 8 is subjected to a great impact force, so as to realize the purpose of using the first spring 64 to offset the impact force. The diameter of the coil 65 is much smaller than that of the winding mechanism 1, which can limit the length of the safety rope 2 wound on the coil 65, thereby improving the fall protection effect, avoiding excessive descent distance for the user, and reducing safety hazards.

[0041] In one feasible embodiment, the fall protection mechanism 3 includes a mating shaft rotating within the winding mechanism 1. Each end of the mating shaft is connected to an abutment piece. A retaining tooth is positioned around the side of the winding mechanism 1, surrounding the shaft and facing the abutment piece. The abutment piece can be roughly considered an arc-shaped piece, with both ends facing the retaining tooth. The retaining tooth can be considered a shark tooth structure, with one side being an outer arc and the other an inner arc. When the fall protection device retracts the cable, the outer arc abuts against the end of the abutment piece and is directly slid away; the abutment piece does not obstruct the cable retraction. When the device releases the cable, because one side of the abutment piece is… Facing the inner arc, the inner arc will collide with the side of the abutment piece away from the inner arc, causing the abutment pieces on both sides to rotate. Because the descent speed is slow, the rotation angle of the abutment piece is limited, and the rotation speed of the locking teeth is also limited. Before the inner arc of the locking teeth and the end of the abutment piece are engaged, the abutment piece will fall back under the action of gravity to avoid the locking teeth. When the descent speed is too fast, because the collision force is large and the locking teeth rotate quickly, the locking teeth will be locked by the abutment pieces on both sides. Because the two have different pivots, the abutment pieces can completely lock the winding mechanism 1, achieving the anti-falling effect.

[0042] In one embodiment of this application, the energy-absorbing mechanism 6 further includes a housing 61, and the housing 61 is provided with a guide portion 62 facing the mounting rope.

[0043] The end of the energy-absorbing mechanism 6 is provided with a guide part 62 relative to the safety rope 2. The guide part 62 can prevent the safety rope 2 from colliding violently with the shell 61 and can protect the safety rope 2.

[0044] In one embodiment of this application, the housing 61 is provided with at least two coils 65, each coil 65 is connected to a first spring member 64 and a fixed shaft 63, the fixed shaft 63 passing through the housing 61.

[0045] The two sets of reels 65 can further tighten the safety rope 2, preventing the energy-absorbing mechanism 6, which serves as the last line of defense, from being easily pulled. Furthermore, the two reels 65 are equivalent to two first springs 64, which have stronger elasticity and can effectively improve the energy absorption effect.

[0046] In one embodiment of this application, at least two limiting wheels 7 are symmetrically provided at one end of the housing 61 near the guide portion 62 along the safety rope 2. The limiting wheels 7 are radially provided with limiting grooves 71 facing the safety rope 2. The two limiting wheels 7 are connected to each other, and the two limiting grooves 71 enclose a limiting cavity for restricting the movement of the safety rope 2.

[0047] The limiting wheel 7 can clamp the safety rope 2 through the limiting groove 71, which can prevent the safety rope 2 from swinging around. The above structure, together with the guide part 62, can effectively protect the safety rope 2 and prevent the safety rope 2 from colliding with the shell 61 and causing rope damage at the moment of falling due to the strong impact force.

[0048] In one embodiment of this application, the limiting groove 71 of the limiting wheel 7 is provided with an abutment ring 72, which is connected to the safety rope 2.

[0049] The abutment ring 72 set in the limiting groove 71 can be a rubber ring, which can increase friction, protect the safety rope 2 and further improve the energy absorption effect.

[0050] In one embodiment of this application, the winding mechanism 1 includes a housing 11, a stabilizing shaft 12, a second spring member 13, and a spool 14. One end of the housing 11 faces the energy absorption mechanism 6 and has a wire outlet end, while the other end has a mounting end. The stabilizing shaft 12 passes through the inner cavity of the housing 11.

[0051] The second spring element 13 is connected at one end to the stabilizing shaft 12 and at the other end to the spool 14.

[0052] The stabilizing shaft 12, the second spring 13, and the spool 14, which are coaxially arranged inside the outer casing 11, cooperate with each other to enable the winding mechanism 1 to automatically retract the safety rope 2 without being subjected to external force. The exit end can facilitate the safe release of the safety rope 2, while the installation end can ensure the quick installation of the fall arrest device itself, making the device easier to use.

[0053] In one embodiment of this application, the fall protection mechanism 3 includes a transmission gear 4 and a fall protection plate 5. The transmission gear 4 includes a plurality of transmission gears, which are arranged in an array facing the stabilizing shaft 12 on the side wall of the spool 14 and surround the second spring member 13.

[0054] The transmission gear 4 has an abutment part 41 on one side and a buffer part 42 on the other side. The buffer part 42 of the previous transmission gear 4 is connected to the abutment part 41 of the next transmission gear 4.

[0055] The fall arrestor 5 is rotatably connected to the stabilizing shaft 12 and is provided on the side wall of the spool 14. The fall arrestor 5 has a limiting part 51 on the side facing the abutment part 41 and a connecting part 52 on the side facing the buffer part 42. The distance between the connecting part 52 and the stabilizing shaft 12 is less than the distance between the limiting part 51 and the stabilizing shaft 12.

[0056] The transmission gear 4 is positioned towards the stabilizing shaft 12. The transmission gear 4 is also structurally shark-tooth shaped. The contact part 41 is an inner arc portion, and the buffer part 42 is an outer arc portion. The limiting part 51 of the fall arrestor 5 is positioned towards the contact part 41, and the connecting part 52 is positioned towards the buffer part 42. Because the distance between the connecting part 52 and the stabilizing shaft 12 is less than the distance between the limiting part 51 and the stabilizing shaft 12, the entire fall arrestor 5 can be regarded as being eccentrically connected to the stabilizing shaft 12, and the center of gravity of the fall arrestor 5 is biased towards the limiting part 51. In its natural state, the fall arrestor 5 will have the connecting part 52 connected to the transmission gear 4.

[0057] In this structure, when the rotation speed of the spool 14 is low, the transmission gear 4 and the limiting part 51 will not connect. When the rotation speed is too high, the two will connect before the limiting part 51 deflects back to the normal position. At the same time, since the transmission gear 4 can normally only connect to the connecting part 52, and when the limiting part 51 connects to the transmission gear 4, the anti-fall plate 5 will jam the spool 14 because the rotation distance of the anti-fall plate 5 is insufficient, which can achieve the effect of rapid anti-fall. Unlike the anti-fall mechanism 3 in the previous embodiment, in this embodiment, the anti-fall plate 5 is located at the stabilizing shaft 12, which can resist impact with the help of the entire outer shell 11 and the stabilizing shaft 12, which can ensure the structural strength of the entire device and improve safety.

[0058] In one embodiment of this application, the weight of the anti-fall plate 5 on the side of the stabilizing shaft 12 toward the limiting part 51 is greater than the weight of the anti-fall plate 5 on the side of the stabilizing shaft 12 toward the connecting part 52, and the anti-fall plate 5 connects the connecting part 52 to the transmission gear 4 under the action of gravity.

[0059] The weight distribution of the material of the fall arrestor plate 5 can also be seen as the weight on the side of the limiting part 51 being greater than the weight on the side of the connecting part 52, which allows the fall arrestor plate 5 to fall more smoothly and avoids the fall arrestor function from being activated by mistake.

[0060] In one embodiment of this application, a plurality of transmission teeth 4 are arrayed on both sides of the spool 14, and the transmission teeth 4 on both sides of the spool 14 are oriented in the same direction.

[0061] Two anti-fall plates 5 are symmetrically arranged on both sides of the spool 14, and both anti-fall plates 5 are rotatably connected to a stabilizing shaft 12.

[0062] Both sides of the spool 14 are equipped with transmission teeth 4. Generally, in order to improve the stability of the fall protection effect, the transmission teeth 4 and the fall protection plate 5 on both sides are symmetrical structures. By balancing the impact force on both sides, the stability of the device can be effectively guaranteed, and the accuracy of fall protection detection can be improved, further protecting the safety of users.

[0063] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0064] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fall arrestor with strong impact resistance, characterized in that, This includes the winding mechanism and the energy absorption mechanism; The winding mechanism is used to wind up and unwind the safety rope, and the winding mechanism is connected to a fall arrest mechanism to prevent the winding mechanism from rotating when the unwinding speed of the winding mechanism is too fast. The safety rope passes through the winding mechanism and is connected to a hook. An energy-absorbing mechanism is connected to one end of the safety rope near the hook. The energy-absorbing mechanism includes a fixed shaft and a coil. A first spring is provided between the fixed shaft and the coil to absorb the impact force of a fall. The fixed shaft, the first spring, and the coil are coaxially arranged. The diameter of the coil is smaller than the diameter of the winding mechanism. The safety rope is housed in the coil in a multi-turn coiled manner.

2. The anti-fall device with strong impact resistance according to claim 1, characterized in that, The energy absorption mechanism also includes a housing, and the housing has a guide portion facing the installation rope.

3. The anti-fall device with strong impact resistance according to claim 2, characterized in that, The housing contains at least two coils, each of which is connected to a first spring and a fixed shaft, the fixed shaft passing through the housing.

4. The anti-fall device with strong impact resistance according to claim 2, characterized in that, At least two limiting wheels are symmetrically arranged along the safety rope at one end of the housing near the guide section. Each limiting wheel has a limiting groove in the radial direction facing the safety rope. The two limiting wheels are connected to each other, and the two limiting grooves enclose a limiting cavity for restricting the movement of the safety rope.

5. A fall arrestor with strong impact resistance according to claim 4, characterized in that, The limiting wheel is provided with an abutment ring in the limiting groove, and the abutment ring is connected to the safety rope.

6. The anti-fall device with strong impact resistance according to claim 1, characterized in that, The winding mechanism includes a housing, a stabilizing shaft, a second spring, and a spool. One end of the housing faces the energy absorption mechanism and has a wire outlet, while the other end has a mounting end. The stabilizing shaft passes through the inner cavity of the housing. One end of the second spring is connected to the stabilizing shaft, and the other end is connected to the spool.

7. A fall arrestor with strong impact resistance according to claim 6, characterized in that, The fall protection mechanism includes transmission teeth and fall protection plates. The transmission teeth include multiple teeth, which are arranged in an array facing the stabilizing shaft on the side wall of the spool and surround the second spring member. The transmission tooth has an abutment part on one side and a buffer part on the other side, and the buffer part of the previous transmission tooth is connected to the abutment part of the next transmission tooth. The fall arrestor is rotatably connected to the stabilizing shaft and is located on the side wall of the spool. The fall arrestor has a limiting part on the side facing the abutment part and a connecting part on the side facing the buffer part. The distance between the connecting part and the stabilizing shaft is less than the distance between the limiting part and the stabilizing shaft.

8. A fall arrestor with strong impact resistance according to claim 7, characterized in that, The weight of the anti-fall plate on the side of the stabilizing shaft facing the limiting part is greater than the weight of the anti-fall plate on the side of the stabilizing shaft facing the connecting part. Under the action of gravity, the anti-fall plate connects the connecting part to the transmission gear.

9. A fall arrestor with strong impact resistance according to claim 7, characterized in that, Multiple transmission teeth are arrayed on both sides of the spool, and the transmission teeth on both sides of the spool face the same direction. Two fall arrestors are symmetrically arranged on both sides of the spool, and each fall arrestor is rotatably connected to a stabilizing shaft.

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