Double-insurance anti-falling device

Abstract

The utility model discloses a double-insurance anti-falling device which comprises a shell, an anti-falling device body and an anti-falling device body. The belt wheel is rotationally connected to the shell; the planet wheel assembly comprises a gear ring, a planet carrier, a sun gear and a planet gear, the gear ring is connected with the belt wheel, an outer tooth face is arranged on the outer circumferential face of the gear ring, the planet carrier is rotationally connected to the belt wheel or the shell, a through hole is formed in the end face of the sun gear, and an inner tooth face is arranged on the inner circumferential face of the through hole; the first self-locking mechanism is arranged in the through hole, the first self-locking mechanism comprises a centrifugal pawl and a reset piece, and the centrifugal pawl is hinged to the planet carrier; the second self-locking mechanism comprises a first pawl, the first pawl is hinged to the shell, and the first pawl abuts against the outer tooth face after rotating in the forward direction. According to the double-insurance anti-falling device, the planet wheel assembly and the belt wheel are braked through the first self-locking mechanism and the second self-locking mechanism, and the safety performance of the anti-falling device is improved. The anti-falling lifesaving device can be applied to the field of anti-falling lifesaving devices.

Description

Technical Field

[0001] The utility model relates to the field of anti-falling lifesaving devices, in particular to a double-safety anti-falling device. Background Art

[0002] Fall arresters are used for high-altitude work. Workers usually wear safety belts for high-altitude work, but because the length of the safety belts is usually fixed, when workers need to move to the next workstation, they need to unfasten the safety belts to have enough range of movement. In this process, they are prone to fall due to the loss of the protection of the safety belts. Therefore, safety belts are usually used in conjunction with fall arresters. Existing fall arresters usually use centrifugal force to pop out a pawl, and the pawl cooperates with the ratchet to lock the shaft. However, the way the pawl and ratchet lock the shaft is relatively flimsy and poses a safety risk. Utility Model Content

[0003] The utility model aims to provide a double insurance anti-falling device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] A double insurance anti-fall device, comprising:

[0006] case;

[0007] a pulley rotatably connected to the housing;

[0008] A planetary gear assembly, comprising a ring gear, a planet carrier, a central gear, and a planetary gear, wherein the ring gear is connected to the pulley, the outer circumference of the ring gear is provided with an outer tooth surface, the planet carrier is rotatably connected to the pulley or the housing, the end surface of the central gear is provided with a through hole, and the inner circumference of the through hole is provided with an inner tooth surface;

[0009] a first self-locking mechanism, which is arranged in the through hole, and comprises a centrifugal pawl and a reset member, wherein the centrifugal pawl is hinged to the planetary carrier, and the elastic force of the reset member causes the centrifugal pawl to reset inward and away from the inner tooth surface, and the centrifugal pawl is subjected to the centrifugal force after the planetary carrier rotates, and resists the elastic force of the reset member to abut against the inner tooth surface outward;

[0010] The second self-locking mechanism comprises a first pawl, wherein the first pawl is hinged to the housing, and the first pawl abuts against the outer tooth surface after positive rotation.

[0011] The beneficial effects of the utility model are as follows: the safety belt is wound around the pulley, and when the safety belt is pulled out faster, the pulley drives the gear ring to rotate faster, and the gear ring drives the planetary gears and the planetary carrier of the planetary gear assembly to rotate, and the planetary carrier with a faster rotation speed drives the centrifugal ratchet of the first self-locking mechanism to rotate, so that the centrifugal ratchet is subjected to the centrifugal force and abuts against the inner tooth surface of the center gear. Since the planetary gears and the center gear rotate in opposite directions, if the centrifugal ratchet abuts against the inner tooth surface to stop the center gear, the entire planetary gear assembly will be stopped; and during the falling process, the user can also use the first ratchet of the second self-locking mechanism to rotate forward and abut against the outer tooth surface of the gear ring to stop the entire planetary gear assembly; the planetary gear assembly and the pulley are braked by the first self-locking mechanism and the second self-locking mechanism to improve the safety performance of the anti-fall device.

[0012] As a further improvement of the above technical solution, the second self-locking mechanism also includes a second pawl, the second pawl is hinged to the housing, and the second pawl abuts against the outer tooth surface after reverse rotation.

[0013] As a further improvement of the above technical solution, the first pawl is provided with a first connecting rod, and the second pawl is provided with a second connecting rod. The second connecting rod is located on the trajectory of the reverse rotation of the first connecting rod. The reverse rotation of the first pawl causes the first connecting rod to push the second connecting rod and the second pawl to rotate forward.

[0014] As a further improvement of the above technical solution, the second self-locking mechanism also includes a first elastic member and a second elastic member, the elastic force of the first elastic member pushes the first pawl to rotate forward, and the elastic force of the second elastic member pushes the second pawl to rotate reversely.

[0015] As a further improvement of the above technical solution, the first self-locking mechanism also includes a rotating plate, the rotating plate is connected to the planetary carrier, the centrifugal pawl is hinged to the rotating plate, there are at least two centrifugal pawls, the two centrifugal pawls are distributed on both sides of the axis of the rotating plate, and the reset member is connected to the centrifugal pawl and the rotating plate.

[0016] As a further improvement of the above technical solution, the first pawl is provided with a handle, and the handle extends out of the shell.

[0017] As a further improvement of the above technical solution, the double safety anti-fall device also includes a locking piece, which is slidably connected to the shell, and the sliding trajectory of the locking piece intersects with the rotation trajectory of the first pawl. After the locking piece slides toward the first pawl, it prevents the first pawl from rotating forward.

[0018] As a further improvement of the above technical solution, at least two blocks are provided at one end of the first pawl abutting against the outer tooth surface.

[0019] As a further improvement of the above technical solution, there are multiple planetary gears, and the multiple planetary gears are evenly distributed on the periphery of the central gear.

[0020] As a further improvement of the above technical solution, the double safety anti-falling device also includes a braided belt, which is wound around the periphery of the pulley. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the double insurance anti-falling device provided by the utility model;

[0023] Figure 2 The utility model provides a double safety anti-falling device, and a front view schematic diagram of an embodiment thereof.

[0024] 100, housing, 200, pulley, 300, planetary gear assembly, 310, ring gear, 311, outer tooth surface, 320, planetary carrier, 330, central gear, 331, through hole, 332, inner tooth surface, 340, planetary gear, 400, first self-locking mechanism, 410, centrifugal pawl, 420, rotating plate, 500, second self-locking mechanism, 510, first pawl, 511, first connecting rod, 512, handle, 520, second pawl, 521, second connecting rod, 600, locking piece. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood to exclude the number, and above, below, within, etc. are understood to include the number.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Reference Figure 1 to Figure 2 The double insurance anti-falling device of the utility model is implemented as follows:

[0030] The double insurance anti-falling device comprises a housing 100 , a pulley 200 , a planetary gear assembly 300 , a first self-locking mechanism 400 , and a second self-locking mechanism 500 .

[0031] An accommodating space is provided inside the housing 100 , and the pulley 200 , the planetary gear assembly 300 , the first self-locking mechanism 400 , and the second self-locking mechanism 500 are all provided inside the housing 100 .

[0032] The pulley 200 is rotatably connected to the housing 100 via a rotating shaft.

[0033] The planetary gear assembly 300 includes a ring gear 310 , a planet carrier 320 , a plurality of planetary gears 340 , and a sun gear 330 .

[0034] The gear ring 310 is connected to the end face of the pulley 200 . The axis of the gear ring 310 coincides with the axis of the pulley 200 . The gear ring 310 and the pulley 200 rotate synchronously. An outer tooth surface 311 is provided on the outer peripheral surface of the gear ring 310 .

[0035] The planet carrier 320 is rotatably connected to the inner wall of the housing 100 , and the rotation axis of the planet carrier 320 coincides with the axis of the pulley 200 .

[0036] A plurality of planetary gears 340 are hinged to the planet carrier 320 , and the plurality of planetary gears 340 are meshed with the inner side wall of the ring gear 310 .

[0037] The central gear 330 is arranged between multiple planetary gears 340. The central gear 330 is meshed with multiple planetary gears 340. The axis of the central gear 330 coincides with the axis of the pulley 200. When the pulley 200 drives the ring gear 310 to rotate, the planetary gears 340 rotate accordingly, and the planetary gears 340 drive the central gear 330 to rotate. The rotation direction of the planetary gears 340 is opposite to the rotation direction of the central gear 330.

[0038] A through hole 331 is provided at an end of the central gear 330 , and an inner circumferential surface of the through hole 331 is provided with an inner tooth surface 332 .

[0039] The first self-locking mechanism 400 is disposed in the through hole 331 of the central gear 330 , and the first self-locking mechanism 400 is provided with a centrifugal ratchet 410 and a reset member.

[0040] The centrifugal pawl 410 is rotatably connected to the planet carrier 320 . The centrifugal pawl 410 rotates in the through hole 331 . The rotation axis of the centrifugal pawl 410 is parallel to the axis of the central gear 330 . One end of the centrifugal pawl 410 is provided with a protrusion for clamping the inner tooth surface 332 of the central gear 330 .

[0041] The reset member is connected to the centrifugal pawl 410 and is an elastic body. The elastic force of the reset member pushes the protrusion of the centrifugal pawl 410 to deviate toward the axis of the central gear 330 , so that the centrifugal pawl 410 is reset and the protrusion is away from the inner tooth surface 332 .

[0042] When the planetary carrier 320 rotates faster around the axis, the planetary carrier 320 drives the centrifugal pawl 410 to rotate faster. The centrifugal pawl 410 is acted upon by the centrifugal force. One end of the centrifugal pawl 410 provided with a protrusion resists the elastic force of the reset member and deviates outward. The protrusion of the centrifugal pawl 410 abuts against the inner tooth surface 332 of the center gear 330 to stop the center gear 330.

[0043] The second self-locking mechanism 500 is provided with a first pawl 510 , which is hinged to the inner wall of the housing 100 . The first pawl 510 can abut against the outer tooth surface 311 of the ring gear 310 when it rotates in the positive direction, so that the ring gear 310 stops rotating.

[0044] The planetary gear assembly 300 and the pulley 200 are braked by the first self-locking mechanism 400 and the second self-locking mechanism 500, thereby improving the safety performance of the anti-fall device.

[0045] In some embodiments, the second self-locking mechanism 500 is further provided with a second pawl 520 , which is rotatably connected to the inner wall of the housing 100 , and the second pawl 520 can abut against the outer tooth surface 311 of the ring gear 310 when rotating in the opposite direction.

[0046] The second self-locking mechanism 500 is provided with a first pawl 510 and a second pawl 520 which jointly clamp the outer tooth surface 311 of the ring gear 310 , thereby improving the braking effect of the second self-locking mechanism 500 on the planetary gear assembly 300 and the pulley 200 .

[0047] In some embodiments, a first connecting rod 511 is provided on a side of the first pawl 510 close to the second pawl 520, and a second connecting rod 521 is provided on a side of the second pawl 520 close to the first pawl 510. After the first pawl 510 rotates in the reverse direction, it disengages from the outer tooth surface 311 of the ring gear 310, and the second connecting rod 521 of the second pawl 520 is located on the trajectory of the reverse rotation of the first connecting rod 511 of the first pawl 510. The reverse rotation of the first connecting rod 511 pushes the second connecting rod 521 to rotate forward, and the second connecting rod 521 disengages from the outer tooth surface 311 of the ring gear 310 after the forward rotation.

[0048] When the second self-locking mechanism 500 unlocks the ring gear 310, the first pawl 510 rotates in the reverse direction and then drives the second connecting rod 521 to rotate forwardly through the first connecting rod 511, so that the first pawl 510 and the second pawl 520 are unlocked in conjunction, making it more convenient for the user to unlock the pulley 200.

[0049] In some embodiments, the second self-locking mechanism 500 is also provided with a first elastic member and a second elastic member, the first elastic member is connected to the inner wall of the shell 100 and the first pawl 510, the first elastic member pushes the first pawl 510 to rotate forward and abuts against the outer tooth surface 311 of the ring gear 310, the second elastic member is connected to the inner wall of the shell 100 and the second pawl 520, the second elastic member pushes the second pawl 520 to rotate reversely and abuts against the outer tooth surface 311 of the ring gear 310.

[0050] By providing the first elastic member and the second elastic member, the first pawl 510 and the second pawl 520 remain stuck on the main outer tooth surface 311 when the user has not unlocked the car. Only when the user needs to unlock the car will the first pawl 510 be pushed to rotate in the opposite direction, so that the first pawl 510 and the second pawl 520 resist the elastic force of the first elastic member and the second elastic member to unlock the car, thereby improving safety.

[0051] In some embodiments, the first self-locking mechanism 400 is also provided with a rotating plate 420, the middle part of the rotating plate 420 is connected to the axis of the planetary carrier 320, the rotating plate 420 rotates synchronously with the planetary carrier 320, the centrifugal ratchet 410 is rotatably connected to the end of the rotating plate 420, and two centrifugal ratchet 410 are provided, and the two centrifugal ratchet 410 are respectively arranged on both sides of the axis of the planetary carrier 320, and a reset member connects a centrifugal ratchet 410 and the rotating plate 420, and the elastic force of the reset member makes the end of the centrifugal ratchet 410 with the protrusion approach the axis of the rotating plate 420.

[0052] Two centrifugal ratchets 410 are provided to lock the inner tooth surface 332 of the central gear 330, so that the braking of the central gear 330 is more stable. The first self-locking mechanism 400 for braking has a higher structural strength, thereby improving the safety performance.

[0053] In some embodiments, the first pawl 510 is provided with a handle 512 , and a distal end of the handle 512 extends out of the housing 100 .

[0054] The user moves the first pawl 510 through the handle 512 .

[0055] In some embodiments, the double safety anti-fall device is also provided with a locking member 600, which is slidably arranged inside the shell 100, and the sliding trajectory of the locking member 600 intersects with the rotation trajectory of the first pawl 510. After the first pawl 510 rotates in the opposite direction, the locking member 600 slides in the direction of the first pawl 510 so that the locking member 600 can prevent the first pawl 510 from rotating in the forward direction.

[0056] The user prevents the first pawl 510 from rotating in the forward direction by sliding the locking member 600, so that the second self-locking mechanism 500 remains in the unlocked state, so that the user can adjust the length of the safety strap.

[0057] In some embodiments, the first pawl 510 is provided with at least two locking blocks, and the two locking blocks of the first pawl 510 are used to be locked on the outer tooth surface 311 of the ring gear 310 .

[0058] The first pawl 510 locks the outer tooth surface 311 of the gear ring 310 through two clamping blocks, thereby improving the braking effect of the first pawl 510 on the gear ring 310, improving the structural strength of the brake, and improving safety.

[0059] In some embodiments, the plurality of planetary gears 340 are evenly distributed around the periphery of the central gear 330 .

[0060] When the central gear 330 is locked by the first self-locking mechanism 400 , the central gear 330 brakes the plurality of planetary gears 340 , so that the plurality of planetary gears 340 brake the ring gear 310 from different positions, thereby improving the braking effect of the pulley 200 .

[0061] In some embodiments, the double safety anti-fall device is provided with a braided belt, and the braided belt is wound around the pulley 200 .

[0062] The braided belt has a high structural strength.

[0063] Specifically, refer to Figure 1 to Figure 2 As shown, the double insurance anti-falling device includes a housing 100, a pulley 200, a planetary gear assembly 300, a first self-locking mechanism 400, a second self-locking mechanism 500, a locking member 600, and a braided belt.

[0064] The interior of the shell 100 is hollow, and the pulley 200, the planetary gear assembly 300, the first self-locking mechanism 400, the second self-locking mechanism 500, and the locking member 600 are all arranged inside the shell 100. The pulley 200 is rotatably connected to the inner wall of the shell 100 through a rotating shaft, and the braided belt is wrapped around the outside of the pulley 200. An opening is opened on one side of the shell 100, and the braided belt extends from the opening to the outside of the shell 100.

[0065] The planetary gear assembly 300 includes a ring gear 310 , a planet carrier 320 , a sun gear 330 , and three planetary gears 340 .

[0066] The ring gear 310 is connected to the end surface of the pulley 200 . The outer circumferential surface of the ring gear 310 is provided with an outer tooth surface 311 . The inner circumferential surface of the ring gear 310 is used for meshing with three planetary gears 340 .

[0067] The axis of the planet carrier 320 is hinged to the inner wall of the housing 100 , and the planet carrier 320 is hinged to the three planetary gears 340 , so that the three planetary gears 340 can rotate and revolve with the planet carrier 320 .

[0068] The central gear 330 is disposed between the three planetary gears 340 . The three planetary gears 340 are evenly distributed around the central gear 330 , and the three planetary gears 340 are meshed with the central gear 330 .

[0069] A through hole 331 is disposed on the end surface of the central gear 330 , and an inner tooth surface 332 is disposed on the inner circumferential surface of the through hole 331 .

[0070] The first self-locking mechanism 400 is disposed in the through hole 331 . The first self-locking mechanism 400 is provided with two centrifugal ratchets 410 , a reset member, and a rotating plate 420 .

[0071] The middle part of the rotating plate 420 is connected to the axis of the planetary carrier 320, and the rotating plate 420 rotates synchronously with the planetary carrier 320. The two ends of the rotating plate 420 are respectively hinged to the two centrifugal ratchets 410. The two centrifugal ratchets 410 are connected by a connecting rod to enable the two centrifugal ratchets 410 to be linked. The movable end of the centrifugal ratchet 410 can rotate outward or inward. The movable end of the centrifugal ratchet 410 is provided with a protrusion, which is used to clamp the inner tooth surface 332 of the center gear 330.

[0072] The reset member is connected to a centrifugal pawl 410 and a rotating plate 420 . The reset member is a tension spring. The elastic force of the reset member pulls the movable end of the centrifugal pawl 410 inward toward the axis of the rotating plate 420 , so that the protrusion at the movable end of the centrifugal pawl 410 is away from the inner tooth surface 332 .

[0073] The second self-locking mechanism 500 is provided with a first pawl 510 , a first elastic member, a second pawl 520 , and a second elastic member.

[0074] The first pawl 510 is rotatably connected to the inner wall of the housing 100. Figure 2 As shown, the counterclockwise rotation of the first pawl 510 is positive rotation, and the clockwise rotation of the first pawl 510 is reverse rotation. Two clamping blocks are provided at one end of the first pawl 510 facing the ring gear 310 , and the two clamping blocks are used to clamp the outer tooth surface 311 of the ring gear 310 .

[0075] The second pawl 520 is rotatably connected to the inner wall of the housing 100. Figure 2As shown, the counterclockwise rotation of the second pawl 520 is positive rotation, and the clockwise rotation of the second pawl 520 is reverse rotation. Two clamping blocks are provided at one end of the second pawl 520 facing the gear ring 310 , and the two clamping blocks are used to clamp the outer tooth surface 311 of the main gear ring 310 .

[0076] A first connecting rod 511 is disposed on a side of the first pawl 510 close to the second pawl 520, and a second connecting rod 521 is disposed on a side of the second pawl 520 close to the first pawl 510. The first connecting rod 511 abuts against the second connecting rod 521 after reverse rotation, and the reverse rotation of the first connecting rod 511 drives the second connecting rod 521 and the second pawl 520 to rotate forward.

[0077] A handle 512 is disposed on the side wall of the first pawl 510 , and an arcuate through slot is formed in the housing 100 at a position corresponding to the handle 512 . The handle 512 extends through the arcuate through slot to the outside of the housing 100 , and the user can rotate the first pawl 510 through the handle 512 .

[0078] The first elastic member is a torsion spring, and the first elastic member is disposed between the first pawl 510 and the inner wall of the housing 100 . The elastic force of the first elastic member pushes the first pawl 510 to rotate in the positive direction.

[0079] The second elastic member is a torsion spring, and the second elastic member is disposed between the second pawl 520 and the inner wall of the housing 100 . The elastic force of the second elastic member pushes the second pawl 520 to rotate in the opposite direction.

[0080] A sliding groove is set on the inner wall of the shell 100, and the locking member 600 is slidably set in the sliding groove. After the locking member 600 slides toward the first pawl 510, it intersects with the rotation trajectory of the handle 512. When the handle 512 drives the first pawl 510 to rotate in the opposite direction, the locking member 600 slides toward the first pawl 510 and abuts against the handle 512. The locking member 600 prevents the first elastic member from driving the first pawl 510 to make the handle 512 rotate in the forward direction.

[0081] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A double insurance anti-fall device, Features: include: case; a pulley rotatably connected to the housing; A planetary gear assembly, comprising a ring gear, a planet carrier, a central gear, and a planetary gear, wherein the ring gear is connected to the pulley, the outer circumference of the ring gear is provided with an outer tooth surface, the planet carrier is rotatably connected to the pulley or the housing, the end surface of the central gear is provided with a through hole, and the inner circumference of the through hole is provided with an inner tooth surface; a first self-locking mechanism, which is arranged in the through hole, and comprises a centrifugal pawl and a reset member, wherein the centrifugal pawl is hinged to the planetary carrier, and the elastic force of the reset member causes the centrifugal pawl to reset inward and away from the inner tooth surface, and the centrifugal pawl is subjected to the centrifugal force after the planetary carrier rotates, and resists the elastic force of the reset member to abut against the inner tooth surface outward; The second self-locking mechanism comprises a first pawl, wherein the first pawl is hinged to the housing, and the first pawl abuts against the outer tooth surface after positive rotation.

2. The double safety anti-falling device according to claim 1, Features: The second self-locking mechanism further includes a second pawl, the second pawl is hinged to the housing, and the second pawl abuts against the outer tooth surface after reverse rotation.

3. The double safety anti-falling device according to claim 2, Features: The first pawl is provided with a first connecting rod, and the second pawl is provided with a second connecting rod. The second connecting rod is located on the trajectory of the reverse rotation of the first connecting rod. The reverse rotation of the first pawl causes the first connecting rod to push the second connecting rod and the second pawl to rotate forward.

4. The double safety anti-falling device according to claim 3, Features: The second self-locking mechanism further includes a first elastic member and a second elastic member. The elastic force of the first elastic member pushes the first pawl to rotate in a positive direction, and the elastic force of the second elastic member pushes the second pawl to rotate in a reverse direction.

5. The double safety anti-falling device according to claim 1, Features: The first self-locking mechanism also includes a rotating plate, which is connected to the planetary frame. The centrifugal pawl is hinged to the rotating plate. There are at least two centrifugal pawls, which are distributed on both sides of the axis of the rotating plate. The reset member is connected to the centrifugal pawl and the rotating plate.

6. The double safety anti-falling device according to claim 1, Features: The first pawl is provided with a handle, and the handle extends out of the housing.

7. The double safety anti-falling device according to claim 1, Features: The double insurance anti-falling device also includes a locking member, which is slidably connected to the shell, and the sliding trajectory of the locking member intersects with the rotation trajectory of the first pawl. After the locking member slides toward the first pawl, it prevents the first pawl from rotating in the forward direction.

8. The double safety anti-falling device according to claim 1, Features: At least two blocks are provided at one end of the first pawl abutting against the outer tooth surface.

9. The double safety anti-falling device according to claim 1, Features: There are a plurality of planetary gears, and the plurality of planetary gears are evenly distributed on the periphery of the central gear.

10. The double safety anti-falling device according to claim 1, Features: The double safety anti-falling device also includes a braided belt, which is wound around the periphery of the pulley.

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