Falling protector

Abstract

The utility model relates to the technical field of high-altitude operation safety protection, and discloses a falling protector. By arranging the centrifugal linkage assembly, when the rotating speed of the locking rotating wheel reaches or exceeds a preset centrifugal threshold value, the centrifugal linkage assembly can be started immediately, so that the buffering rotating wheel and the locking rotating wheel rotate synchronously, and the damping plate is fixedly installed between the outer wall of the buffering rotating wheel and the inner wall of the buffering groove; the damping plate acts on a damping medium located between the outer wall of the buffering rotating wheel and the inner wall of the buffering groove, a rotating damping structure is formed, mechanical energy is consumed, and therefore the rotating speed of the locking rotating wheel is reduced.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for high-altitude operations, specifically to fall arresters. Background Technology

[0002] High-altitude operations are extremely common in power construction and maintenance, such as wind turbine installation, transmission line maintenance, and substation equipment maintenance. These operations are typically carried out at heights of hundreds of meters, in complex environments (such as strong winds, low temperatures, and conductor vibrations), posing extremely high safety risks to workers. Fall arresters, as core equipment for ensuring the safety of workers at height, directly affect their safety and work efficiency.

[0003] When working at heights, the fall arrestor's casing is suspended at a high altitude, with the safety rope extending outside the fall arrestor and attached to the worker's waist (or a safety belt fastened around the worker's waist), moving with the worker. The principle is as follows: when the worker is descending at a normal speed during normal operations, the safety rope wound on the drum of the fall arrestor is released and maintained at a suitable length following the worker's movement. However, if the worker's descent speed is too high or a fall occurs, the internal mechanism of the fall arrestor activates because the safety rope is released faster than normal. This locks the drum, preventing the safety rope from being released further, thus avoiding potential impact injuries from a further fall. When the worker returns to normal work, the fall arrestor can be manually unlocked for the next safety protection operation.

[0004] However, due to the lack of a buffer function, the drum will stop rotating the moment it is locked, while the worker still tends to fall due to inertia. This causes the rigid locking of the safety rope to cause the outer end of the safety rope attached to the worker's waist (or the safety belt on the worker's waist) to exert a large force on the human body and directly act on the worker's body, which can easily cause secondary injuries, resulting in poor reliability of the fall arrestor. Utility Model Content

[0005] In view of this, the present invention provides a fall arrestor to solve the problem that the drum stops rotating the moment it is locked, resulting in a large force acting on the waist of the worker and easily causing secondary injury.

[0006] Specifically, the fall arrestor provided by this utility model includes a housing, a locking component, and a buffer component. The outer shell has a cylindrical locking groove and a cylindrical buffer groove, which are coaxially arranged and spaced apart along the axial direction. The buffer groove is used to fill a damping medium. The locking groove and the buffer groove are connected, and the connection point is a circular notch extending along the axial direction. The locking assembly includes a locking wheel, which is installed in the locking groove. The outer wall of the locking wheel is used to wind a rope. The buffer assembly includes a buffer wheel and a damping plate. The buffer wheel is installed in the buffer groove and is coaxially arranged with the locking wheel through a central rotating shaft. The buffer wheel and the locking wheel respectively block the circular notch along the axial direction. When the rotation speed of the locking wheel is greater than or equal to the centrifugal threshold, the buffer wheel rotates synchronously with the locking wheel through the centrifugal linkage assembly. Along the radial direction of the buffer wheel, the two opposing walls of the damping plate are respectively installed on the outer wall of the buffer wheel and the inner wall of the buffer groove. The damping plate has at least one damping hole.

[0007] Beneficial effects: By incorporating a centrifugal linkage component, when the rotational speed of the locking wheel reaches or exceeds a preset centrifugal threshold (such as during a fall or rapid descent), the centrifugal linkage component will be activated immediately, causing the buffer wheel and the locking wheel to rotate synchronously. By fixing the damping plate between the outer wall of the buffer wheel and the inner wall of the buffer groove, when the buffer wheel rotates, the damping plate will act on the damping medium located between the outer wall of the buffer wheel and the inner wall of the buffer groove, forming a rotational damping structure, consuming kinetic energy, and thus slowing down the rotational speed of the locking wheel.

[0008] In one optional embodiment, the centrifugal linkage assembly includes a centrifugal component and a locking ratchet. The centrifugal component is rotatably mounted on the end face of the locking wheel near the buffer wheel via a first rotating shaft eccentric to the central rotating shaft along the axial direction of the central rotating shaft, and the centrifugal component is located within the buffer groove. The locking ratchet is mounted on the end face of the buffer wheel near the locking wheel along the axial direction of the central rotating shaft, and the locking ratchet is located within the buffer groove. The locking ratchet and the buffer wheel are coaxially arranged and rotate synchronously. When the rotational speed of the locking wheel is greater than the centrifugal threshold, the centrifugal component is engaged with the locking ratchet to drive the locking ratchet to rotate synchronously.

[0009] In one optional embodiment, the centrifugal component is provided with a first hook eccentric to the central rotating shaft; the inner wall of the locking ratchet is provided with a plurality of circumferentially arranged teeth; when the rotational speed of the locking wheel is greater than the centrifugal threshold, the first hook of the centrifugal component is engaged with the teeth of the locking ratchet to drive the locking ratchet to rotate synchronously.

[0010] In one optional embodiment, the first rotating shaft is eccentrically positioned relative to the central rotating shaft; the distance between the first hook and the central rotating shaft radially is a first gap; the centrifugal linkage assembly further includes a fixed base and a compression spring; the fixed base is fixedly installed on the end face of the locking wheel near the buffer wheel along the axial direction of the central rotating shaft; the fixed base is eccentrically positioned relative to the central rotating shaft on the side of the centrifugal component near the central rotating shaft; the fixed base and the centrifugal component are spaced apart, and the distance between the fixed base and the centrifugal component is a second gap; the compression spring is elastically installed between the centrifugal component and the fixed base; when the rotational speed of the locking wheel exceeds the centrifugal threshold, the centrifugal component rotates around the first rotating shaft, the first gap gradually increases, the second gap gradually decreases, the centrifugal component applies pressure to the compression spring, the compression spring stores energy, and when the rotational speed of the locking wheel gradually decreases and falls below the centrifugal threshold, the compression spring releases energy, the first gap gradually decreases, and the second gap gradually increases.

[0011] In one optional embodiment, two centrifugal components are provided. Along the radial direction of the central axis, the two centrifugal components are rotatably mounted on both sides of the central axis via two first shafts. The centrifugal linkage assembly further includes a connecting rod, the two ends of which are opposite to each other along their length direction and are respectively connected to the two centrifugal components via two second shafts. One second shaft is arranged between the first hook of one centrifugal component and the first shaft, and the other second shaft is arranged on the side of the other first shaft opposite to the first hook of the other centrifugal component.

[0012] In one optional embodiment, the locking wheel has a first inner wall surrounding the central pivot. The locking assembly further includes a first torsion spring radially positioned, with a spring coil of the first torsion spring sleeved on the central pivot. The first spring coil of the first torsion spring is located between the first inner wall and the outer wall of the central pivot. At least one end of the first spring coil of the first torsion spring has a first torsion arm inserted into the first inner wall.

[0013] In one optional embodiment, the buffer wheel has a second inner wall surrounding the central pivot; the locking assembly further includes a second torsion spring, which is radially positioned such that a second coil of the second torsion spring is sleeved on the central pivot, the coil of the second torsion spring is located between the second inner wall and the outer wall of the central pivot, and at least one end of the second coil of the second torsion spring has a second torsion arm inserted into the second inner wall.

[0014] In one optional embodiment, the outer shell includes an upper shell and a lower shell, the upper shell being provided with an upper connecting plate; the lower shell being provided with a lower connecting plate corresponding to the upper connecting plate, the lower connecting plate being connected to the upper connecting plate.

[0015] In one optional embodiment, the upper connecting plate has a connecting base on the side facing away from the lower connecting plate in the height direction; the fall arrestor further includes a hook assembly, the hook assembly including a second hook, an anti-detachment baffle and a third torsion spring, the second hook being rotatably connected to the connecting base via a third rotating shaft, and the second hook having an opening; the anti-detachment baffle is rotatably installed at the opening of the second hook to block the opening of the second hook; the third coil of the third torsion spring is sleeved on the third rotating shaft, the third torsion spring having a third torsion arm, and the third torsion arm abutting against the anti-detachment baffle.

[0016] In one alternative embodiment, the lower housing is provided with a baffle plate, which is installed in the buffer groove and is located downstream of the damping plate rotation path. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A perspective view of the fall arrestor provided in an embodiment of this utility model;

[0019] Figure 2 A perspective view of the fall arrester provided in this embodiment of the present invention after separation of the upper shell, lower shell, locking assembly, buffer assembly and central rotating shaft;

[0020] Figure 3 A perspective view of the fall arrester provided in this embodiment of the present utility model after the upper shell, lower shell, locking assembly, buffer assembly and central rotating shaft are separated;

[0021] Figure 4 A side view of the fall arrestor provided in an embodiment of this utility model;

[0022] Figure 5 for Figure 4 Sectional view of section AA;

[0023] Figure 6 for Figure 5 A perspective view of the buffer assembly installed at the central pivot.

[0024] Figure 7 for Figure 5 The buffer assembly shown is installed at the central pivot point from another perspective.

[0025] Figure 8 for Figure 5 A perspective view of the buffer assembly shown, in which the second torsion spring is mounted at the central pivot.

[0026] Figure 9 for Figure 4 Sectional view of section BB;

[0027] Figure 10 for Figure 9 The centrifugal component, first rotating shaft, fixed base, compression spring, connecting rod, and second rotating shaft shown are mounted on the locking wheel in a perspective view.

[0028] Figure 11 for Figure 9 A perspective view showing the locking wheel and the first torsion spring mounted at the central pivot.

[0029] Figure 12 for Figure 4 A sectional view of section C-C;

[0030] Figure 13 for Figure 12 The first torsion spring shown is mounted on the central pivot in a perspective view.

[0031] Figure 14 A perspective view of the upper and lower shells of the fall arrester provided in this embodiment of the utility model after separation;

[0032] Figure 15 A perspective view of the hook assembly in the fall arrester provided in an embodiment of this utility model;

[0033] Figure 16 A perspective view of the lower shell of the fall arrester provided in an embodiment of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Outer shell; 11. Locking groove; 12. Buffer groove; 13. Circular notch; 14. Upper shell; 141. Upper connecting plate; 15. Lower shell; 151. Lower connecting plate; 152. Baffle; 153. Rope outlet; 154. Mounting hole; 16. Fastener; 17. Connecting base;

[0036] 2. Locking assembly; 21. Locking wheel; 211. First inner wall; 22. First torsion spring; 221. First spring coil; 222. First torsion arm;

[0037] 3. Buffer assembly; 31. Buffer wheel; 311. Second inner wall; 32. Damping plate; 33. Second torsion spring; 331. Second spring coil; 332. Second torsion arm;

[0038] 4. Central pivot;

[0039] 5. Centrifugal linkage assembly; 51. Centrifugal component; 511. First hook; 52. First rotating shaft; 531. Clamping tooth; 54. Fixed base; 55. Compression spring; 56. Connecting rod; 57. Second rotating shaft;

[0040] 6. Hook assembly; 61. Second hook; 62. Third pivot; 63. Anti-slip baffle; 64. Third torsion spring; 641. Third spring ring; 642. Third torsion arm;

[0041] H1, first spacing; H2, second spacing. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] The following is combined Figures 1 to 16 The following describes embodiments of the present invention.

[0044] According to an embodiment of this utility model, a fall arrestor is provided. For example... Figure 1 and Figure 2 As shown, the fall arrestor includes a housing 1, a locking assembly 2, and a cushioning assembly 3.

[0045] Specifically, such as Figure 14 As shown, the outer casing 1 is provided with a cylindrical locking groove 11 and a cylindrical buffer groove 12. The locking groove 11 and the buffer groove 12 are coaxially arranged and spaced apart along the axial direction. The buffer groove 12 is used to fill the damping medium. The locking groove 11 and the buffer groove 12 are connected and the connection point is a circular notch 13 extending along the axial direction.

[0046] like Figures 1 to 4 , Figures 10 to 14 As shown, the locking assembly 2 includes a locking wheel 21, which is installed in the locking groove 11, and the outer wall of the locking wheel 21 is used to wind the rope.

[0047] like Figures 1 to 9As shown, the buffer assembly 3 includes a buffer wheel 31 and a damping plate 32. The buffer wheel 31 is installed in the buffer groove 12. The buffer wheel 31 is coaxially arranged with the locking wheel 21 through the central rotating shaft 4. The buffer wheel 31 and the locking wheel 21 respectively block the circular notch 13 along the axial direction. Along the radial direction of the buffer wheel 31, the two opposing walls of the damping plate 32 are respectively installed on the outer wall of the buffer wheel 31 and the inner wall of the buffer groove 12. The damping plate 32 is provided with at least one damping hole.

[0048] When a worker falls accidentally, the rope wrapped around the surface of the locking wheel 21 will be pulled out quickly, causing the locking wheel 21 to rotate rapidly.

[0049] That is, when the rotational speed of the locking wheel 21 is greater than or equal to the centrifugal threshold, the buffer wheel 31 rotates synchronously with the locking wheel 21 through the centrifugal linkage component 5.

[0050] With this configuration, the centrifugal linkage component 5 is provided. When the rotational speed of the locking wheel 21 reaches or exceeds the preset centrifugal threshold (such as when falling or falling rapidly), the centrifugal linkage component 5 will be activated immediately, so that the buffer wheel 31 and the locking wheel 21 rotate synchronously. By fixing the damping plate 32 between the outer wall of the buffer wheel 31 and the inner wall of the buffer groove 12, when the buffer wheel 31 rotates, the damping plate 32 will act on the damping medium located between the outer wall of the buffer wheel 31 and the inner wall of the buffer groove 12, forming a rotational damping structure, consuming kinetic energy, thereby slowing down the rotational speed of the locking wheel 21.

[0051] Furthermore, by providing at least one damping hole on the damping plate 32, the damping medium is allowed to move from the downstream side to the upstream side of the damping plate 32 through the damping hole, further increasing the rotational resistance. This helps the locking wheel 21 to gradually reduce its speed, avoids the phenomenon of the locking wheel 21 suddenly stopping, and significantly reduces the impact force acting on the operator.

[0052] Meanwhile, by using locking wheel 21 and buffer wheel 31 to seal the circular notch 13, the damping medium in the buffer groove 12 is prevented from overflowing into the locking groove 11.

[0053] In the above embodiments, the rope component is preferably a chain, rope, steel cable or other component. One end of its length is used as the starting end that is wound around the outer wall of the locking wheel 21, and the other end is used as a free end that extends into the external environment of the outer shell 1 within the locking groove 11, for attaching to the safety belt of the worker's waist via a hook.

[0054] Furthermore, such as Figure 12 As shown, the bottom of the lower housing 15 is provided with a rope outlet 153, allowing the free end of the rope to extend from the locking groove 11 into the external environment of the housing 1.

[0055] In use, the rope can be retracted by the motor driving the locking wheel 21 to rotate; of course, it can also be slowly retracted by the elastic structure resetting.

[0056] It can be noted that the damping medium can be a liquid medium or an elastic material.

[0057] Preferably, the damping medium is oil, such as silicone oil or hydraulic oil.

[0058] With this configuration, fluid resistance or elastic deformation is generated when the damping plate 32 rotates, converting kinetic energy into thermal energy or elastic potential energy, thus achieving efficient energy absorption.

[0059] It can be explained that under normal use, the locking wheel 21 works independently to ensure that the rope is wound normally. In an emergency, the centrifugal linkage component 5 ensures that the locking wheel 21 and the buffer wheel 31 rotate synchronously, thereby transmitting the braking force brought by the damping medium to the locking wheel 21, thus reducing the impact force on the operator.

[0060] In one embodiment, such as Figures 1 to 4 , Figures 7 to 11 As shown, the centrifugal linkage assembly 5 includes a centrifugal component 51 and a locking ratchet.

[0061] The centrifugal component 51 is rotatably mounted on the end face of the locking wheel 21 near the buffer wheel 31 via a first rotating shaft 52 eccentric to the central rotating shaft 4 along the central rotating shaft 4. The centrifugal component 51 is located in the buffer groove 12. The locking ratchet is mounted on the end face of the buffer wheel 31 near the locking wheel 21 along the central rotating shaft 4. The locking ratchet is located in the buffer groove 12. The locking ratchet and the buffer wheel 31 are coaxially arranged and rotate synchronously. When the rotation speed of the locking wheel 21 is greater than the centrifugation threshold, the centrifugal component 51 is engaged with the locking ratchet to drive the locking ratchet to rotate synchronously.

[0062] With this configuration, the centrifugal component 51 is axially positioned along the central axis 4 on the end face of the locking wheel 21 near the buffer wheel 31, and is placed within the buffer groove 12. When the rotation speed of the locking wheel 21 exceeds a preset threshold, the resulting centrifugal force will cause it to move away from the central axis 4, thus shifting outwards. This continues until the centrifugal component 51 is engaged with the locking ratchet, causing the locking ratchet to rotate. This ensures that the locking wheel 21 and the buffer wheel 31 rotate coaxially and synchronously, guaranteeing that the linkage will be triggered in emergency situations (such as a sudden increase in rotation speed due to a fall).

[0063] It can be noted that the locking ratchet and the buffer wheel 31 are axially spliced ​​together. They can be integrally formed or designed separately and then welded together.

[0064] In one embodiment, such as Figure 10 As shown, the centrifugal component 51 is provided with a first hook 511 eccentric to the central rotating shaft 4; as Figure 7 and Figure 9 As shown, the inner wall of the locking ratchet is provided with several circumferentially arranged teeth 531; when the rotation speed of the locking wheel 21 is greater than the centrifugal threshold, the first hook 511 of the centrifugal component 51 is engaged with the teeth 531 of the locking ratchet to drive the locking ratchet to rotate synchronously.

[0065] With this configuration, the centrifugal component 51 is provided with a first hook 511 eccentric to the central rotating shaft 4. When the rotation speed of the locking wheel 21 exceeds the threshold, the centrifugal force will shift the first hook 511 outward, making it radially away from the central rotating shaft 4. The locking ratchet is provided with several circumferentially arranged teeth 531, ensuring that no matter what rotation angle the first hook 511 is at, it can be engaged by the nearest tooth 531. That is, the limitation of the trigger angle is improved, which helps to trigger in time and solves the safety hazards caused by the inaccurate mechanical linkage, delayed response or insufficient reliability of traditional fall arresters.

[0066] In one embodiment, such as Figure 10 As shown, the first rotating shaft 52 is eccentrically positioned relative to the central rotating shaft 4; the distance between the first hook 511 and the central rotating shaft 4 along the radial direction of the central rotating shaft 4 is the first spacing H1; the centrifugal linkage assembly 5 also includes a fixed base 54 and a compression spring 55. The fixed base 54 is fixedly installed on the end face of the locking wheel 21 near the buffer wheel 31 along the axial direction of the central rotating shaft 4. The fixed base 54 is eccentrically positioned relative to the central rotating shaft 4 on the side of the centrifugal component 51 near the central rotating shaft 4. The fixed base 54 and the centrifugal component 51 are spaced apart, and the distance between the fixed base 54 and the centrifugal component 51 is the second spacing H2; the compression spring 55 is elastically installed between the centrifugal component 51 and the fixed base 54.

[0067] During operation, when the rotational speed of the locking wheel 21 exceeds the centrifugal threshold, the centrifugal element 51 rotates around the first shaft 52, the first gap H1 gradually increases, the second gap H2 gradually decreases, and the centrifugal element 51 applies pressure to the compression spring 55, which gradually stores energy. Meanwhile, the locking wheel 21 gradually decelerates due to the braking effect of the buffer wheel 31, and when it falls below the centrifugal threshold, the compression spring 55 releases energy, the first gap H1 gradually decreases, and the second gap H2 gradually increases.

[0068] This configuration, by eccentrically positioning the first rotating shaft 52 to the central rotating shaft 4, allows the centrifugal component 51 to generate a larger centrifugal torque when rotating around the first rotating shaft 52. Furthermore, by eccentrically mounting the fixed base 54 to the end face of the locking wheel 21 and spaced apart from the centrifugal component 51, a stable support point is provided for the compression spring 55. This restricts the movement of the centrifugal component 51 within the constraint range of the fixed base 54 and the spring, preventing excessive offset that could lead to jamming or failure.

[0069] Meanwhile, by setting the first rotating shaft 52 eccentrically, and using the fixed base 54 and compression spring 55 in conjunction, the first gap H1 and the second gap H2 can be dynamically changed without manual intervention, so that the centrifugal component 51 can automatically move to the initial position after the danger is cleared, ensuring the next triggering use.

[0070] It can be explained that, in order to make the process of the centrifugal component 51 driving the locking ratchet more stable, the number of centrifugal components 51 is set to at least two, at which point at least two centrifugal components 51 achieve linkage triggering.

[0071] As one implementation method, such as Figure 10 As shown, there are two centrifugal components 51. Along the radial direction of the central rotating shaft 4, the two centrifugal components 51 are rotatably mounted on both sides of the central rotating shaft 4 via two first rotating shafts 52. The centrifugal linkage assembly 5 also includes a connecting rod 56. The two ends of the connecting rod 56 that are opposite to each other along its length are connected to the two centrifugal components 51 via two second rotating shafts 57.

[0072] In this configuration, a second rotating shaft 57 is arranged between the first hook 511 of a centrifugal member 51 and the first rotating shaft 52, and another second rotating shaft 57 is arranged on the side of another first rotating shaft 52 opposite to the first hook 511 of the other centrifugal member 51.

[0073] With this configuration, the two ends of the connecting rod 56, which are opposite to each other along its length, are connected to the two centrifugal components 51 via two second rotating shafts 57, thereby enabling the two centrifugal components 51 to be triggered in a coordinated manner.

[0074] That is, when one centrifugal component 51 shifts outward due to centrifugal force, it will drive the connecting rod 56 to move, and the connecting rod 56 will simultaneously pull and drag the other centrifugal component 51, resulting in synchronous shift and achieving bidirectional synchronous triggering.

[0075] In one embodiment, such as Figures 11 to 13 As shown, the locking wheel 21 has a first inner wall 211, which is arranged around the central rotating shaft 4; the locking assembly 2 also includes a first torsion spring 22, which is radially connected to the central rotating shaft 4. The first coil 221 of the first torsion spring 22 is located between the first inner wall 211 and the outer wall of the central rotating shaft 4. At least one end of the first coil 221 of the first torsion spring 22 is provided with a first torsion arm 222, which is inserted into the first inner wall 211.

[0076] With this configuration, the spring coil of the first torsion spring 22 is sleeved on the central rotating shaft 4, and the first torsion arm 222 is inserted into the first inner wall 211 of the locking wheel 21. When the locking wheel 21 is rotated by an external force (such as the force generated when the rope slides), the first torsion arm 222 will rotate accordingly. During this process, it will act on the first spring coil 221 to store energy. After the external force is removed, the first spring coil 221 releases energy, driving the locking wheel 21 to rotate in the opposite direction until it returns to the initial position, thus achieving reset and reducing manual intervention.

[0077] In one embodiment, such as Figures 5 to 8 As shown, the buffer wheel 31 is provided with a second inner wall 311, which is arranged around the central rotating shaft 4; the locking assembly 2 also includes a second torsion spring 33, which is radially connected to the central rotating shaft 4 with its second spring coil 331 sleeved on it. The spring coil of the second torsion spring 33 is located between the second inner wall 311 and the outer wall of the central rotating shaft 4. At least one end of the second spring coil 331 of the second torsion spring 33 is provided with a second torsion arm 332, which is inserted into the second inner wall 311.

[0078] With this configuration, the second coil 331 of the second torsion spring 33 is sleeved on the central rotating shaft 4, and the second torsion arm 332 is inserted into the second inner wall 311 of the buffer wheel 31. When the buffer wheel 31 and the locking wheel 21 rotate synchronously, the second torsion arm 332 will drive the second coil 331 to deform, generating a reverse torque to store energy. As the buffer wheel 31 gradually stops rotating, the energy is gradually released, driving the buffer wheel 31 to slowly reset, ensuring that it returns to its initial state after the danger is eliminated.

[0079] Meanwhile, the second spring coil 331 is located between the second inner wall 311 and the outer wall of the central rotating shaft 4, which can be integrated and installed without occupying additional space, making the fall arrestor lighter and more compact as a whole.

[0080] In addition, the second torsion spring 33 and the first torsion spring 22 work together to ensure precise control of the attitude of the locking wheel 21 and the buffer wheel 31 throughout the entire process from locking to buffering, thereby improving the safety and reliability of the fall arrestor.

[0081] It can be explained that there are two first torsion arms 222 of a first torsion spring 22 and two second torsion arms 332 of a second torsion spring 33. At this time, the two first torsion arms 222 are arranged in a circumferentially offset manner, and the two second torsion arms 332 are arranged in a circumferentially offset manner.

[0082] Furthermore, the number of the first torsion spring 22 and the second torsion spring 33 is not specifically limited. There can be one or more.

[0083] Preferably, two first torsion springs 22 and two second torsion springs 33 are provided.

[0084] This configuration allows the torque on the spring containing the torsion arm to be evenly distributed across multiple locations on the rotating wheel, improving the phenomenon of localized stress concentration, reducing the vibration amplitude during the rotation of the rotating wheel, and making the rotating wheel more stable during rotation.

[0085] In one embodiment, such as Figures 1 to 5 , Figure 9 , Figure 12 , Figure 14 and Figure 16 As shown, the outer shell 1 includes an upper shell 14 and a lower shell 15. The upper shell 14 is provided with an upper connecting plate 141; the lower shell 15 is provided with a lower connecting plate 151 corresponding to the upper connecting plate 141, and the lower connecting plate 151 is connected to the upper connecting plate 141.

[0086] This design, by dividing the outer shell 1 into an upper shell 14 and a lower shell 15, allows for the installation and debugging of internal components such as locking rollers 21, buffer rollers 31, and centrifugal linkage components 5, which are installed in either the upper shell 14 or the lower shell 15. Then, the upper shell 14 and the lower shell 15 are quickly assembled using the upper connecting plate 141 and the lower connecting plate 151, thus simplifying the assembly process and reducing assembly difficulty.

[0087] It can be noted that the connection method between the upper housing 14 and the lower housing 15 is preferably a detachable connection.

[0088] Furthermore, both the upper connecting plate 141 and the lower connecting plate 151 are provided with mounting holes 154. During installation, fasteners 16 such as bolts and nuts are used to fix the plate.

[0089] It can be explained that the connection between the upper connecting plate 141 and the lower connecting plate 151 is designed to be dustproof and waterproof, such as by providing a sealing strip or applying waterproof glue at the connection between the two connecting plates, to reduce the entry of external dust, moisture or impurities into the housing 1, reduce the contamination or corrosion of internal components such as the locking wheel 21, and extend the service life.

[0090] In one embodiment, such as Figures 1 to 5 , Figure 9 , Figure 12 , Figure 14 and Figure 15As shown, the upper connecting plate 141 has a connecting base 17 on the side facing away from the lower connecting plate 151 in the height direction; the fall arrestor also includes a hook assembly 6, which includes a second hook 61, an anti-detachment baffle 63 and a third torsion spring 64. The second hook 61 is rotatably connected to the connecting base 17 through a third rotating shaft 62, and the second hook 61 has an opening; the anti-detachment baffle 63 is rotatably installed at the opening of the second hook 61 to block the opening of the second hook 61; the third spring coil 641 of the third torsion spring 64 is sleeved on the third rotating shaft 62, and the third torsion spring 64 has a third torsion arm 642, which abuts against the anti-detachment baffle 63.

[0091] With this configuration, the second hook 61 is rotatably connected to the connecting base 17 via the third pivot 62, allowing the second hook 61 to swing flexibly within a certain angle range. By applying pressure to the anti-detachment baffle 63 by the third torsion arm 642 of the third torsion spring 64, when an external force is applied to the anti-detachment baffle 63, the anti-detachment baffle 63 applies pressure to the third torsion arm 642 of the third torsion spring 64, and the third spring coil 641 of the third torsion spring 64 will store energy. After the external force is removed, the spring coil of the third torsion spring 64 releases energy, driving the third torsion arm 642 to seal the opening of the second hook 61, ensuring that the second hook 61 will not fall off during use, thereby preventing the fall arrestor from falling accidentally.

[0092] During installation, the second hook 61 is suspended from a fixed object at the work site. After suspension, the third torsion arm 642 of the third torsion spring 64 rebounds and abuts against the anti-detachment baffle 63 until the opening of the second hook 61 is closed.

[0093] It can be noted that the number of third torsion arms 642 is preferably two.

[0094] In one embodiment, such as Figures 1 to 5 , Figure 14 and Figure 16 As shown, the lower housing 15 is provided with a baffle 152, which is installed in the buffer groove 12 and is located on the downstream side of the rotation path of the damping plate 32.

[0095] With this configuration, a baffle 152 is provided in the lower housing 15, and the baffle 152 is installed in the buffer groove 12 and positioned on the downstream side of the rotation path of the damping plate 32. When the buffer wheel 31 drives the damping plate 32 to rotate, the relative movement between the baffle 152 and the damping plate 32 causes the space between them to gradually shrink, forcing the damping medium (such as oil or gas) to accelerate its flow in the confined channel, significantly increasing the fluid resistance, thereby achieving gradual braking of the buffer wheel 31.

[0096] When the fall arrestor provided in the above embodiment is in normal working condition, i.e., when the rope is slowly pulled out, the locking wheel 21 can rotate freely around the central axis 4 without affecting the movement of the operator. At the same time, the first torsion spring 22 undergoes torsional deformation, storing energy and generating a reverse reset torque. After the operation is completed, the rope can be retrieved under the reset action of the first torsion spring 22.

[0097] When the fall arrestor provided in the above embodiment is in an accidental fall state during use, that is, when the rope is quickly pulled out, the two centrifugal components 51 rotate around the central axis 4. Affected by centrifugal force, the two centrifugal components 51 have a rotational tendency relative to the two second axes 57. The compression spring 55 is compressed and shortened to store energy. Under the coordinated action of the displacement of the connecting rod 56, the first hooks 511 of the two centrifugal components 51 are simultaneously offset to the outside.

[0098] Furthermore, when the rope component's extraction speed reaches the centrifugal threshold, the first hook 511 will engage with the locking ratchet's teeth 531, causing the buffer wheel 31 to rotate around the central axis 4. The damping plate 32 will rotate around the central axis 4 within the buffer groove 12, compressing the damping medium to flow through the damping hole to the other side of the damping plate 32, dissipating the mechanical energy within the system, thereby reducing the rope component's extraction speed and achieving the purpose of buffering the fall process.

[0099] During this process, the rotation of the buffer wheel 31 causes the second torsion spring 33 to undergo torsional deformation and generate a reverse reset torque, thus storing energy. After the workers are rescued, the second torsion spring 33 releases energy, causing the buffer wheel 31 to rotate in the opposite direction until it returns to its initial position.

[0100] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A fall arrestor, characterized in that, include: The outer casing (1) is provided with a cylindrical locking groove (11) and a cylindrical buffer groove (12). The locking groove (11) and the buffer groove (12) are coaxially arranged and spaced apart along the axial direction. The buffer groove (12) is used to fill the damping medium. The locking groove (11) and the buffer groove (12) are connected and the connection point is a circular notch (13) extending along the axial direction. The locking assembly (2) includes a locking wheel (21) which is installed in the locking groove (11) and the outer wall of the locking wheel (21) is used for winding a rope. The buffer assembly (3) includes a buffer wheel (31) and a damping plate (32). The buffer wheel (31) is installed in the buffer groove (12). The buffer wheel (31) is coaxially arranged with the locking wheel (21) through a central rotating shaft (4). The buffer wheel (31) and the locking wheel (21) respectively block the circular notch (13) along the axial direction. When the rotation speed of the locking wheel (21) is greater than or equal to the centrifugal threshold, the buffer wheel (31) rotates synchronously with the locking wheel (21) through the centrifugal linkage assembly (5). Along the radial direction of the buffer wheel (31), the two opposing walls of the damping plate (32) are respectively installed on the outer wall of the buffer wheel (31) and the inner wall of the buffer groove (12).

2. The fall arrestor according to claim 1, characterized in that, The centrifugal linkage component (5) includes: The centrifugal component (51) is rotatably mounted on the end face of the locking wheel (21) near the buffer wheel (31) along the central rotating shaft (4) axial direction via a first rotating shaft (52) eccentric to the central rotating shaft (4). The centrifugal component (51) is located in the buffer groove (12). A locking ratchet is installed on the end face of the buffer wheel (31) near the locking wheel (21) along the central rotating shaft (4). The locking ratchet is located in the buffer groove (12). The locking ratchet and the buffer wheel (31) are coaxially arranged and rotate synchronously. When the rotational speed of the locking wheel (21) is greater than the centrifugal threshold, the centrifugal component (51) is attached to the locking ratchet to drive the locking ratchet to rotate synchronously.

3. The fall arrestor according to claim 2, characterized in that, The centrifugal component (51) is provided with a first hook (511) eccentric to the central rotating shaft (4); The inner wall of the locking ratchet is provided with several circumferentially arranged teeth (531); When the rotational speed of the locking wheel (21) is greater than the centrifugal threshold, the first hook (511) of the centrifugal component (51) is engaged with the locking ratchet's teeth (531) to drive the locking ratchet to rotate synchronously.

4. The fall arrestor according to claim 3, characterized in that, The first rotating shaft (52) is eccentrically positioned relative to the central rotating shaft (4); Along the radial direction of the central pivot (4), the distance between the first hook (511) and the central pivot (4) is the first spacing (H1); The centrifugal linkage component (5) also includes: A fixed base (54) is fixedly installed on the end face of the locking wheel (21) near the buffer wheel (31) along the axial direction of the central rotating shaft (4). The fixed base (54) is eccentrically disposed on the side of the centrifugal component (51) near the central rotating shaft (4). The fixed base (54) and the centrifugal component (51) are spaced apart. The distance between the fixed base (54) and the centrifugal component (51) is the second spacing (H2). A compression spring (55) is elastically installed between the centrifugal component (51) and the fixed base (54); When the rotational speed of the locking wheel (21) exceeds the centrifugal threshold, the centrifugal element (51) rotates around the first rotating shaft (52), the first gap (H1) gradually increases, the second gap (H2) gradually decreases, the centrifugal element (51) applies pressure to the compression spring (55), the compression spring (55) stores energy, and when the rotational speed of the locking wheel (21) gradually decreases and falls below the centrifugal threshold, the compression spring (55) releases energy, the first gap (H1) gradually decreases, and the second gap (H2) gradually increases.

5. The fall arrestor according to claim 2 or 3, characterized in that, Two centrifugal components (51) are provided, and along the radial direction of the central rotating shaft (4), the two centrifugal components (51) are respectively rotatably mounted on both sides of the central rotating shaft (4) via two first rotating shafts (52); The centrifugal linkage component (5) also includes: The connecting rod (56) has two ends that are opposite to each other along its length direction, which are respectively connected to the two centrifugal components (51) through two second rotating shafts (57); One of the second rotating shafts (57) is arranged between the first hook (511) of one of the centrifugal components (51) and the first rotating shaft (52), and the other second rotating shaft (57) is arranged on the side of the other first rotating shaft (52) opposite to the first hook (511) of the other centrifugal component (51).

6. The fall arrestor according to any one of claims 1-3, characterized in that, The locking wheel (21) is provided with a first inner wall (211), which is arranged around the central rotating shaft (4); The locking assembly (2) further includes: A first torsion spring (22) is radially positioned, with its coil sleeved on the central rotating shaft (4). The first coil (221) of the first torsion spring (22) is located between the first inner wall (211) and the outer wall of the central rotating shaft (4). At least one end of the first coil (221) of the first torsion spring (22) is provided with a first torsion arm (222), which is inserted into the first inner wall (211).

7. The fall arrestor according to any one of claims 1-3, characterized in that, The buffer wheel (31) is provided with a second inner wall (311), which is arranged around the central rotating shaft (4); The locking assembly (2) further includes: The second torsion spring (33) is radially positioned with its second coil (331) sleeved on the central rotating shaft (4). The coil of the second torsion spring (33) is located between the second inner wall (311) and the outer wall of the central rotating shaft (4). At least one end of the second coil (331) of the second torsion spring (33) is provided with a second torsion arm (332), which is inserted into the second inner wall (311).

8. The fall arrestor according to any one of claims 1-3, characterized in that, The outer casing (1) includes: The upper housing (14) is provided with an upper connecting plate (141); The lower housing (15) has a lower connecting plate (151) corresponding to the upper connecting plate (141), and the lower connecting plate (151) is connected to the upper connecting plate (141).

9. The fall arrestor according to claim 8, characterized in that, The upper connecting plate (141) is provided with a connecting base (17) on the side that is away from the lower connecting plate (151) in the height direction; The fall arrestor also includes a hook assembly (6), which comprises: The second hook (61) is rotatably connected to the connecting base (17) via the third pivot (62), and the second hook (61) is provided with an opening; An anti-detachment baffle (63) is rotatably installed at the opening of the second hook (61) to block the opening of the second hook (61); The third torsion spring (64) has a third spring ring (641) sleeved on the third rotating shaft (62), and the third torsion spring (64) has a third torsion arm (642) abutting against the anti-detachment baffle (63).

10. The fall arrestor according to claim 8, characterized in that, The lower housing (15) is provided with a baffle (152), which is installed in the buffer groove (12) and is located on the downstream side of the rotation path of the damping plate (32).

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