A rock climbing descender

Abstract

The invention relates to a rock climbing descender, comprising a housing, a descender belt, a retraction assembly and a permanent magnetic braking assembly. The descender belt has its ends extending out of the housing through a descender belt outlet. The descender belt is connected to the retraction assembly, which is capable of retracting the descender belt. The permanent magnetic braking assembly is rotatable relative to the housing. When the descender belt is descending, the permanent magnetic braking assembly is connected to the retraction assembly, and the permanent magnetic braking assembly is capable of generating a braking torque to reduce the rotational speed of the retraction assembly, and thus the descending speed of the descender belt. The advantage is that when the user is climbing, the retraction assembly is capable of retracting the descender belt to keep the descender belt in a taut state. When the user is descending, the permanent magnetic braking assembly is connected to the retraction assembly, and the permanent magnetic braking assembly is capable of generating a braking torque to reduce the rotational speed of the retraction assembly, and thus the descending speed of the descender belt. When the user reaches the ground and disconnects from the descender belt, the retraction assembly is capable of retracting the descender belt to a taut state.

Description

Technical Field

[0001] This invention relates to the field of descent devices, and more particularly to a rock climbing descent device. Background Technology

[0002] Rock climbing has a long history, dating back to the 18th century when mountaineers developed a systematic climbing technique to overcome snow-covered, icy, and rocky terrain. With the development of rock climbing and the increasing emphasis on climbing training in fields such as fire safety, reliable climbing safety equipment has been invented and researched by more and more people.

[0003] Rock climbing safety equipment mainly includes descent devices. When a user uses the descent strap of a descent device to freefall, the descent device can limit the descent speed of the strap, allowing the user to descend at a safe speed. However, when existing descent devices are used as rock climbing descent devices, the descent strap cannot automatically retract and maintain a pre-tensioned state as the user climbs upwards, thus failing to provide protection for the user. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a rock climbing descent device, which solves the technical problem that when the descent device in the prior art is used as a rock climbing descent device, the descent belt cannot automatically retract and maintain a pre-tensioned state when the user climbs upward, thus failing to provide protection for the user.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] This invention provides a rock climbing descent device, including a housing, and further including a descent belt, a retraction assembly, and a permanent magnet descent assembly located within the housing;

[0009] The end of the descent band extends out of the descent band outlet on the housing;

[0010] The descent belt is connected to the retraction assembly, and the retraction assembly can drive the descent belt to retract.

[0011] The permanent magnet descent assembly is capable of rotating relative to the housing;

[0012] When the descent belt descends, the permanent magnet descent component connects to the retraction component. The permanent magnet descent component can generate braking torque to reduce the rotational speed of the retraction component, thereby reducing the descent speed of the descent belt.

[0013] According to the present invention, the recovery component includes:

[0014] A deceleration belt reel, wherein the deceleration belt is wound around the deceleration belt reel;

[0015] Two spiral spring end caps are fixedly connected to the descent belt reel.

[0016] A spiral spring, wherein the spiral spring is located between two spiral spring end caps, and the first end of the spiral spring is connected to the housing, and the second end of the spiral spring is connected to the spiral spring end cap.

[0017] According to the present invention, a spiral spring guide groove is provided on the inner peripheral wall of the housing;

[0018] The first end of the spiral spring is fitted with a wear-resistant sleeve, which is inserted into the guide groove of the spiral spring.

[0019] According to the present invention, the permanent magnet slow-descent assembly includes:

[0020] Stator sleeve, which is fixedly connected to the housing;

[0021] A permanent magnet rotor assembly, at least a portion of which is located within the stator sleeve and is rotatable relative to the stator sleeve to generate braking torque on the permanent magnet rotor assembly, wherein the permanent magnet rotor assembly is detachably connected to the decelerating belt reel, and wherein the permanent magnet rotor assembly is unidirectionally rotatable when connected to the decelerating belt reel.

[0022] According to the present invention, when the deceleration belt descends, the permanent magnet rotor assembly is connected to the deceleration belt disk, and the deceleration belt can drive the deceleration belt disk and the permanent magnet rotor assembly to rotate synchronously;

[0023] When the deceleration belt is retracted, the permanent magnet rotor assembly is connected to the deceleration belt disk, and the permanent magnet rotor assembly is stationary;

[0024] When the deceleration belt is stationary, the permanent magnet rotor assembly is disconnected from the deceleration belt disc.

[0025] According to the present invention, the permanent magnet rotor assembly includes:

[0026] A permanent magnet rotor frame is rotatably connected to the housing, and a pawl groove is provided on the inner peripheral wall of the end of the permanent magnet rotor frame.

[0027] A permanent magnet rotor, wherein the permanent magnet rotor is fixed to the outer peripheral wall of the permanent magnet rotor frame;

[0028] The permanent magnet slow-descent component also includes:

[0029] An annular boss is provided at the end of the deceleration belt disc, and a receiving groove is provided on the outer peripheral wall of the annular boss.

[0030] A pawl actuating block, one end of which is rotatably connected to the receiving groove via a rotating shaft, and a torsion spring is sleeved on the rotating shaft, so that the pawl actuating block can engage or disengage from the pawl groove.

[0031] According to the present invention, a speed regulating component is further included, the speed regulating component comprising:

[0032] A lead screw, which is rotatably connected to the housing;

[0033] A lead screw nut, which is sleeved and threaded onto the lead screw;

[0034] Both the retraction component and the permanent magnet slow-descent component are rotatably connected to the lead screw nut relative to it.

[0035] The handle is connected to the lead screw, and the handle can drive the lead screw to rotate.

[0036] According to the present invention, the speed regulating assembly further includes a guide rod, the guide rod being fixedly connected to the housing and parallel to the lead screw;

[0037] The lead screw nut is mounted on the guide rod and can move axially relative to the guide rod.

[0038] According to the present invention, a magnetic chuck is provided on the rotating handle, and the rotating handle is detachably connected to the first end of the lead screw through the magnetic chuck.

[0039] According to the present invention, a polygonal hole is provided at the first end of the housing;

[0040] The first end of the lead screw is provided with a connector, which is a cuboid and passes through the polygonal hole;

[0041] The rotating handle is provided with a cuboid groove, and a plug-in boss is also formed around the groove on the rotating handle. The outer peripheral sidewall of the plug-in boss is polygonal.

[0042] The insertion boss can be inserted into the polygonal hole, and the groove can be inserted into the connector.

[0043] (III) Beneficial Effects

[0044] The beneficial effects of this invention are as follows: This invention provides a rock climbing descent device where the end of the descent belt extends out of the housing for user access. The descent belt is connected to a retrieval assembly. When the user is climbing, the retrieval assembly retracts the descent belt, keeping it taut for better user protection. The permanent magnet descent assembly can rotate relative to the housing. When the user descends, the permanent magnet descent assembly connects to the retrieval assembly, generating braking force to reduce the rotational speed of the retrieval assembly, thus slowing the descent speed of the descent belt and allowing the user to descend at a safe speed. After the user lands on the ground and disengages from the descent belt, the retrieval assembly retracts and tightens the descent belt. Furthermore, this rock climbing descent device can also be used for fall protection for workers at heights, making it suitable for a wide range of applications. Attached Figure Description

[0045] Figure 1 This is a cross-sectional view of the rock climbing descent device of the present invention;

[0046] Figure 2 for Figure 1 A schematic diagram of the decomposition process;

[0047] Figure 3 for Figure 2 An exploded view of the shell inside;

[0048] Figure 4 This is a three-dimensional schematic diagram of the descent belt disc (partially an exploded view);

[0049] Figure 5 This is a three-dimensional schematic diagram of the permanent magnet rotor frame.

[0050] [Explanation of Labels in the Attached Image]

[0051] 1: Housing; 11: Housing body; 111: Deceleration belt outlet; 112: Spiral spring guide groove; 12: End cap; 121: Polygonal hole; 122: Mounting hole;

[0052] 2: Descent zone;

[0053] 3: Retraction assembly; 31: Decelerating belt reel; 32: Spiral spring end cap; 33: Spiral spring; 331: Wear-resistant sleeve; 332: Bending section;

[0054] 4: Permanent magnet slow-descent assembly; 41: Stator sleeve; 42: Permanent magnet rotor assembly; 421: Permanent magnet rotor frame; 4211: Pawl slot; 422: Permanent magnet rotor; 423: Permanent magnet rotor end cover; 43: Unidirectional rotation assembly; 431: Annular boss; 4311: Receiving groove; 432: Pawl; 433: Rotating shaft; 434: Torsion spring;

[0055] 5: Speed ​​control assembly; 51: Lead screw; 511: Connector; 52: Lead screw nut; 53: Rotating handle; 531: Groove; 532: Insertion boss; 54: Guide rod; 55: Magnetic plate; 56: Nut; 57: Elastic retaining ring; 58: Locking washer;

[0056] a: First bearing; b: Second bearing; c: Third bearing; d: Fourth bearing. Detailed Implementation

[0057] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] See Figure 1-5 As shown, the rock climbing descent device proposed in this embodiment of the invention includes a housing 1, and also includes a descent belt 2, a retraction component 3, and a permanent magnet descent component 4 located inside the housing 1.

[0059] The end of the descent belt 2 extends out of the descent belt outlet 111 on the housing 1 for user use. The descent belt 2 is connected to the retrieval assembly 3. When the user is climbing, the retrieval assembly 3 can retract the descent belt 2 to keep it taut for better user protection. The permanent magnet descent assembly 4 can rotate relative to the housing 1. When the user descends, the permanent magnet descent assembly 4 connects to the retrieval assembly 3 and generates a braking torque to reduce the rotational speed of the retrieval assembly 3, thereby reducing the descent speed of the descent belt 2 and allowing the user to descend at a safe speed. After the user lands on the ground and disengages from the descent belt 2, the retrieval assembly 3 can retract the descent belt 2 to tautness. This climbing descent device can also be used for fall protection for workers at heights, making it suitable for a wide range of applications.

[0060] Furthermore, the housing 1 includes a housing body 11 and two end caps 12.

[0061] The main body 11 is cylindrical, with open ends. Two end caps 12 are detachably connected to the two ends of the main body 11 by bolts. A polygonal hole 121 is provided on the end cap 12 located at the first end of the main body 11. A deceleration belt outlet 111 is provided on the side wall of the main body 11 for the deceleration belt 2 to pass through. A spiral spring guide groove 112 is provided on the inner peripheral wall of the main body 11, and the spiral spring guide groove 112 extends axially along the main body 11.

[0062] Specifically, both end caps 12 are provided with mounting holes 122, which are used to fix the mounting brackets so that the climbing descent device can be fixed to the top of the rock or the top of a high-rise building or other application scenarios.

[0063] Furthermore, the recovery assembly 3 includes a slow-descent belt reel 31, two spiral spring end caps 32, and a spiral spring 33.

[0064] The deceleration belt 2 is wound around the deceleration belt reel 31. Two spiral spring end caps 32 are fixedly connected to the deceleration belt reel 31. A spiral spring 33 is located between the two spiral spring end caps 32, with its first end connected to the housing 1 and its second end connected to the spiral spring end cap 32. Preferably, the two spiral spring end caps 32 are detachably fixedly connected to the deceleration belt reel 31 by bolts.

[0065] In use, the housing 1 is fixed to the top of the rock. When the user climbs, the spiral spring 33 drives the spiral spring end cap 32 to rotate in the first direction. The spiral spring end cap 32 drives the descent belt reel 31 to rotate synchronously. The descent belt reel 31 drives the descent belt 2 to rotate synchronously, thereby retracting the descent belt 2 and putting it in a taut state. When the user descends, the user's own weight causes the descent belt 2 to descend. The descent belt 2 drives the descent belt reel 31 to rotate in the opposite direction of the first direction. The descent belt reel 31 drives the two spiral spring end caps 32 to rotate synchronously. The spiral spring end caps 32 cause the second end of the spiral spring 33 to stretch. When the user lands on the ground and disengages from the descent belt 2, the spiral spring 33 returns to its original position and drives the spiral spring end cap 32 to rotate in the first direction. The spiral spring end cap 32 drives the descent belt reel 31 to rotate synchronously. The descent belt reel 31 drives the descent belt 2 to rotate synchronously, thereby retracting and tautning the descent belt 2.

[0066] Specifically, a wear-resistant sleeve 331 is fitted onto the first end of the spiral spring 33, and the wear-resistant sleeve 331 is inserted into the spiral spring guide groove 112.

[0067] The second end of the spiral spring 33 is bent radially inward to form a bent portion 332. The bent portion 332 is used to insert into the groove on the spiral spring end cap 32 so that the second end of the spiral spring 33 can be detachably connected to the spiral spring end cap 32.

[0068] Furthermore, the permanent magnet slow-descent assembly 4 includes a stator sleeve 41 and a permanent magnet rotor assembly 42.

[0069] The stator sleeve 41 is fixedly connected to the housing 1. At least a portion of the permanent magnet rotor assembly 42 is located within the stator sleeve 41. An air gap exists between the permanent magnet rotor assembly 42 and the stator sleeve 41, and the permanent magnet rotor assembly 42 is rotatable relative to the stator sleeve 41 to generate braking torque. The permanent magnet rotor assembly 42 is detachably connected to the decelerating belt reel 31. When connected to the decelerating belt reel 31, the permanent magnet rotor assembly 42 is unidirectionally rotatable. Preferably, the stator sleeve 41 is made of copper, copper alloy, aluminum, or aluminum alloy.

[0070] When the deceleration belt 2 descends, the permanent magnet rotor assembly 42 connects to the deceleration belt disc 31. The deceleration belt 2 drives the deceleration belt disc 31 and the permanent magnet rotor assembly 42 to rotate synchronously. The permanent magnet rotor assembly 42 rotates relative to the stator sleeve 41, generating eddy currents and a reverse magnetic field between the permanent magnet rotor assembly 42 and the stator sleeve 41. When this reverse magnetic field acts on the permanent magnet rotor assembly 42, it generates a braking torque. Under the action of the braking torque, the rotational speed of the deceleration belt disc 31 driven by the permanent magnet rotor assembly 42 decreases, and the descent speed of the deceleration belt 2 driven by the deceleration belt disc 31 decreases. When the deceleration belt 2 retracts, the permanent magnet rotor assembly 42 connects to the deceleration belt disc 31 and remains stationary. The unidirectional rotation configuration of the permanent magnet rotor assembly 42 allows it to decelerate the descending deceleration belt 2 without affecting its retraction.

[0071] When the deceleration belt 2 is stationary, the permanent magnet rotor assembly 42 is disconnected from the deceleration belt disc 31.

[0072] Because there is an air gap between the permanent magnet rotor assembly 42 and the stator sleeve 41 in the permanent magnet slow descent assembly 4, there is no frictional loss between the permanent magnet rotor assembly 42 and the stator sleeve 41 during use. Therefore, the permanent magnet slow descent assembly 4 has a long service life.

[0073] Furthermore, the permanent magnet rotor assembly 42 includes a permanent magnet rotor frame 421 and a permanent magnet rotor 422.

[0074] The permanent magnet rotor frame 421 is rotatably connected to the housing 1, and a pawl groove 4211 is provided on the inner peripheral wall of the end of the permanent magnet rotor frame 421. The permanent magnet rotor 422 is fixed to the outer peripheral wall of the permanent magnet rotor frame 421. Preferably, multiple permanent magnet rotors 422 are provided, and the multiple permanent magnet rotors 422 are spaced apart along the circumference of the permanent magnet rotor frame 421. The magnetism of two adjacent permanent magnet rotors 422 is opposite. The permanent magnet rotors 422 are detachably fixed to the outer peripheral wall of the permanent magnet rotor frame 421 by bolts or magnetic clamps. The arrangement of the permanent magnet rotors 422 is preferably a Heilbeck arrangement.

[0075] The permanent magnet rotor assembly 42 also includes a permanent magnet rotor end cover 423, which is detachably fixed to the end of the permanent magnet rotor frame 421 by bolts.

[0076] Furthermore, the permanent magnet slow-descent assembly 4 also includes a one-way rotation assembly 43, which is used to connect the permanent magnet rotor frame 421 and drive the permanent magnet rotor assembly 42 to rotate in one direction.

[0077] The one-way rotation assembly 43 includes an annular boss 431 and a pawl actuating block 432.

[0078] An annular boss 431 is disposed at the end of the deceleration belt reel 31. Preferably, the annular boss 431 and the deceleration belt reel 31 are an integral structure. A receiving groove 4311 is provided on the outer peripheral wall of the annular boss 431. One end of the pawl actuating block 432 is rotatably connected to the receiving groove 4311 via a rotating shaft 433. A torsion spring 434 is sleeved on the rotating shaft 433, and the pawl actuating block 432 can engage or disengage from the pawl slot 4211. When the pawl actuating block 432 is engaged in the pawl slot 4211, its operating principle is similar to that of a ratchet. The pawl actuating block 432 can only drive the permanent magnet rotor frame 421 with the pawl slot 4211 to rotate in direction one. When the rotation direction of the pawl actuating block 432 is opposite to direction one, the pawl actuating block 432 cannot drive the permanent magnet rotor frame 421 with the pawl slot 4211 to rotate. At this time, the retraction component 3 rotates relative to the permanent magnet rotor frame 421.

[0079] When a user is rock climbing, the spiral spring 33 drives the spiral spring end cap 32 to rotate in the first direction. The spiral spring end cap 32 drives the deceleration belt reel 31 and the deceleration belt 2 to rotate in the first direction so as to drive the deceleration belt 2 to retract. The deceleration belt reel 31 can drive the annular boss 431 to rotate synchronously, thereby generating centrifugal force on the pawl actuating block 432. Under the action of centrifugal force, the pawl actuating block 432 disengages from the receiving groove 4311 of the annular boss 431 and engages in the pawl slot 4211 of the permanent magnet rotor frame 421 so that the deceleration belt reel 31 is connected to the permanent magnet rotor frame 421. At this time, the torsion spring 434 twists. Since the pawl actuating block 432 can only drive the permanent magnet rotor assembly 42 to rotate in the opposite direction of the first direction when the pawl actuating block 432 and the pawl slot 4211 are engaged, that is, the permanent magnet rotor assembly 42 can only rotate in one direction, the permanent magnet rotor assembly 42 remains stationary and will not generate braking torque that affects the retraction of the deceleration belt 2.

[0080] When the user lands, the user drives the descent belt 2 to descend. The descent belt 2 can drive the descent belt disc 31 to rotate in the opposite direction of the first direction. The descent belt disc 31 drives the spiral spring end cap 32 to rotate synchronously. The spiral spring 33 is in a stretched state, and the descent belt disc 31 drives the annular boss 431 to rotate synchronously. This generates centrifugal force on the pawl actuating block 432. Under the action of centrifugal force, the pawl actuating block 432 disengages from the receiving groove 4311 of the annular boss 431 and engages in the pawl slot 4211 of the permanent magnet rotor frame 421, so that the descent belt disc 31 is connected to the permanent magnet rotor frame 421. At this time, the torsion spring 434 twists. The slow-descent belt reel 31 drives the permanent magnet rotor frame 421 and the permanent magnet rotor 422 to rotate synchronously in opposite directions along the first direction through the cooperation of the pawl actuating block 432 and the pawl slot 4211. This causes the permanent magnet rotor 422 to rotate relative to the stator sleeve 41 and generate a braking torque on the permanent magnet rotor assembly 42. Under the action of the braking torque, the rotation speed of the slow-descent belt reel 31 driven by the permanent magnet rotor assembly 42 is reduced, and the descent speed of the slow-descent belt 2 driven by the slow-descent belt reel 31 is reduced.

[0081] When the user lands on the ground and disengages from the deceleration belt 2, the spiral spring 33 returns to its original position and drives the spiral spring end cap 32 to rotate in the first direction. The spiral spring end cap 32 drives the deceleration belt disc 31 to rotate synchronously, and the deceleration belt disc 31 drives the deceleration belt 2 to rotate synchronously to retract and tighten the deceleration belt 2. The deceleration belt disc 31 also drives the annular boss 431 to rotate synchronously. Under the action of centrifugal force, the pawl actuating block 432 disengages from the receiving groove 4311 and engages in the pawl slot 4211. Since the pawl actuating block 432 can only drive the permanent magnet rotor assembly 42 to rotate in the opposite direction of the first direction when the pawl actuating block 432 and the pawl slot 4211 are engaged, that is, the permanent magnet rotor assembly 42 can only rotate in one direction, the permanent magnet rotor assembly 42 remains stationary and will not generate a braking torque that affects the retraction of the deceleration belt 2. When the deceleration belt 2 is fully retracted, the deceleration belt 2 comes to a standstill, the deceleration belt reel 31 stops rotating, there is no centrifugal force on the pawl actuating block 432, the torsion spring 434 returns and drives the pawl actuating block 432 to disengage from the pawl slot 4211 and enter the receiving slot 4311, and the permanent magnet rotor assembly 42 is disconnected from the deceleration belt reel 31.

[0082] It should be noted that when the user lands, once the rotational speed of the descent belt 2 reaches a certain value, causing the descent belt disc 31 and the annular boss 431 to rotate, the centrifugal force acting on the pawl actuating block 432 can overcome the preload of the torsion spring 434 and disengage from the receiving groove 4311, engaging in the pawl slot 4211. This, in turn, reduces the descent speed of the descent belt 2 under the braking torque of the permanent magnet descent assembly 4. Therefore, torsion springs 434 with different preloads can be selected to adjust the starting speed of the permanent magnet descent assembly 4 for the descent belt 2.

[0083] More specifically, there are multiple pawl actuating blocks 432 and multiple receiving slots 4311, which are spaced apart circumferentially along the annular boss 431, with each pawl actuating block 432 corresponding to a pawl receiving slot 4311. There are also multiple pawl slots 4211, which are spaced apart circumferentially along the permanent magnet rotor frame 421, with each pawl slot 4211 corresponding to a pawl actuating block 432.

[0084] More specifically, the pawl actuating block 432 is provided with two opposing extended arms, and the torsion spring 434 is located between the two extended arms, with the two ends of the torsion spring 434 respectively abutting against the opposing surfaces of the two extended arms.

[0085] Furthermore, the climbing descent device also includes a speed control component 5, which is used to adjust the descent speed of the descent belt 2 to improve the user's descent efficiency.

[0086] The speed control assembly 5 includes a lead screw 51, a lead screw nut 52, and a rotating handle 53. The lead screw 51 is rotatably connected to the housing 1. The lead screw nut 52 is sleeved and threaded onto the lead screw 51. Both the retraction assembly 3 and the permanent magnet rotor assembly 42 are rotatably connected to the lead screw nut 52 relative to it. The rotating handle 53 is connected to the lead screw 51 and can drive the lead screw 51 to rotate.

[0087] In use, rotating the handle 51 causes the screw 51 to rotate, which in turn drives the screw nut 52 to move axially. The screw nut 52 then drives the retraction assembly 3 and the permanent magnet rotor assembly 42 to move axially synchronously. The permanent magnet rotor assembly 42 moves relative to the stator sleeve 41 along their respective axial directions, thus changing the relative area between them. The relative area between the permanent magnet rotor assembly 42 and the stator sleeve 41 is proportional to the magnitude of the magnetic force between them, which in turn is proportional to the magnitude of the braking torque acting on the permanent magnet rotor assembly 42. Therefore, rotating the handle 51 adjusts the braking torque acting on the permanent magnet rotor assembly 42, thereby changing the rotation speed of the slow-descent belt 31 and consequently the descent speed of the slow-descent belt 2. This allows for adjustment of the descent speed to meet the user's needs and is suitable for users of different weights, making it applicable to a wide range of users.

[0088] Specifically, when the lead screw nut 52 drives the retraction assembly 3 to move axially, the wear-resistant sleeve 331, which is fitted onto the first end of the spiral spring 33 in the retraction assembly 3, can move axially within the spiral spring guide groove 112 of the housing 1. By providing the wear-resistant sleeve 331, frictional wear of the spiral spring 33 can be avoided. The material of the wear-resistant sleeve 331 is preferably a low-wear and low-friction material such as polytetrafluoroethylene or phenolic resin-reinforced fabric.

[0089] Specifically, the two ends of the lead screw 51 are connected to the two end caps 12 via the first bearing a. The first bearing a is preferably a deep groove ball bearing or an angular contact bearing, more preferably an angular contact bearing, which has better axial load capacity and longer service life.

[0090] Furthermore, the speed regulating assembly 5 also includes a guide rod 54, which is fixedly connected to the housing 1 and parallel to the lead screw 51. The lead screw nut 52 is movably mounted on the guide rod 54 along the axial direction of the lead screw 51, guiding the movement of the lead screw nut 52. Specifically, both ends of the guide rod 54 are inserted into the opposite sidewalls of the two end caps 12. Preferably, two guide rods 54 are provided, symmetrically arranged radially along the housing 1 to improve the guiding stability of the lead screw nut 52.

[0091] Specifically, the permanent magnet rotor frame 421 of the permanent magnet rotor assembly 42 is sleeved on the lead screw nut 52, and a second bearing b is provided between the permanent magnet rotor frame 421 and the lead screw nut 52. The outer ring of the second bearing b is fixedly connected to the permanent magnet rotor assembly 42, and the inner ring of the second bearing b is fixedly connected to the lead screw nut 52. The second bearing b is preferably a deep groove ball bearing or an angular contact bearing, more preferably an angular contact bearing, which has better axial load capacity and longer service life.

[0092] Specifically, the two scroll spring end caps 32 and the deceleration belt reel 31 of the retraction component 3 are both sleeved on the lead screw nut 52, a third bearing c is provided between the two scroll spring end caps 32 and the lead screw nut 52, and a fourth bearing d is provided between the deceleration belt reel 31 and the lead screw nut 52.

[0093] The lead screw nut 52 can drive the permanent magnet slow-descent assembly 4 and the retraction assembly 3 to move synchronously along the axial direction through the second bearing b, the third bearing c and the fourth bearing d.

[0094] Specifically, the first end of the lead screw nut 52 has an annular groove, and the second end of the lead screw nut 52 is fitted with and threaded onto a nut 56. An elastic retaining ring 57 and a locking washer 58 are respectively fitted at both ends of the lead screw nut 52. The elastic retaining ring 57 is located within the annular groove, and the locking washer 58 is located between the nut 56 and the third bearing c. The elastic retaining ring 57 is used to axially limit the movement of the second bearing b. The locking washer 58 and the nut 56 are used to axially limit the movement of the third bearing c.

[0095] Furthermore, a magnetic plate 55 is provided on the rotating handle 53, and the rotating handle 53 is detachably connected to the first end of the lead screw 51 through the magnetic plate 55.

[0096] Furthermore, a connector 511 is provided at the first end of the lead screw 51. The connector 511 is cuboid and passes through the polygonal hole 121 on the housing 1. A cuboid groove 531 is provided on the rotating handle 53, and an insertion boss 532 is formed around the groove 531 on the rotating handle 53. The outer peripheral sidewall of the insertion boss 532 is polygonal. The insertion boss 532 can be inserted into the polygonal hole 121 on the housing 1, and the groove 531 can be inserted into the connector 511.

[0097] Specifically, the first end of the lead screw 51 forms a lead screw stepped structure around the connector 511, and a handle stepped structure is set at the center of the insertion boss 532 of the rotating handle 53. A magnetic piece 55 is set on the end face of the handle stepped structure, and the magnetic piece 55 can be magnetically attracted to the end face of the lead screw stepped structure.

[0098] In the initial state, the insertion boss 532 on the rotating handle 53 is inserted into the polygonal hole 121 on the housing 1, and the groove 531 is inserted into the cuboid connector 511. The rotating handle 53 magnetically attracts the first end of the lead screw 51 through the magnetic suction piece 55. Under the combined action of the insertion boss 532 and the polygonal hole 121, as well as the groove 531 and the connector 511, the rotating handle 53 cannot be rotated, thus locking the lead screw 51.

[0099] When it is necessary to adjust the descent speed of the descent band 2:

[0100] Pull the plug 532 on the rotating handle 53 out of the polygonal hole 121, disengage the magnetic piece 55 on the rotating handle 53, and keep the groove 531 on the rotating handle 53 inserted into the connector 511 of the lead screw 51. Rotate the rotating handle 53, and the rotating handle 53 will drive the lead screw 51 to rotate, so as to adjust the descent speed of the slow descent belt 2.

[0101] When speed adjustment of descent belt 2 is not required:

[0102] Insert the plug 532 into the polygonal hole 121, and rotate the magnetic plate 55 on the handle 53 to magnetically attract the first end of the lead screw 51 to lock the lead screw 51.

[0103] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0104] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rock climbing descender, characterized in that, The device comprises a shell (1), a slow descent belt (2), a retraction assembly (3) and a permanent magnet slow descent assembly (4) in the shell (1); The end of the slow descent belt (2) extends out of the slow descent belt outlet (111) on the shell (1); The slow descent belt (2) is connected to the retraction assembly (3), and the retraction assembly (3) can drive the slow descent belt (2) to retract; the retraction assembly (3) comprises a slow descent belt disc (31), and the slow descent belt (2) is arranged on the slow descent belt disc (31); The permanent magnet slow descent assembly (4) comprises a stator sleeve (41) and a permanent magnet rotor assembly (42); The stator sleeve (41) is fixedly connected to the shell (1); at least part of the permanent magnet rotor assembly (42) is located in the stator sleeve (41), and the permanent magnet rotor assembly (42) can rotate relative to the stator sleeve (41); the permanent magnet rotor assembly (42) is detachably connected to the slow descent belt disc (31); when the permanent magnet rotor assembly (42) is connected to the slow descent belt disc (31), the permanent magnet rotor assembly (42) can rotate in one direction; when the slow descent belt (2) descends, the permanent magnet rotor assembly (42) is connected to the slow descent belt disc (31), the slow descent belt (2) can drive the slow descent belt disc (31) and the permanent magnet rotor assembly (42) to rotate synchronously, the permanent magnet rotor assembly (42) rotates relative to the stator sleeve (41) and generates a braking torque, the rotating speed of the permanent magnet rotor assembly (42) driven by the slow descent belt disc (31) is reduced, and the descending speed of the slow descent belt (2) driven by the slow descent belt disc (31) is reduced; Further comprising a speed regulating assembly (5), the speed regulating assembly (5) comprises: A lead screw (51) rotatably connected to the shell (1); A lead screw nut (52) sleeved and threadedly connected on the lead screw; The retraction assembly (3) and the permanent magnet slow descent assembly (4) are rotatably connected to the lead screw nut (52); A rotating handle (53) connected to the lead screw (51), the rotating handle (53) can drive the lead screw (51) to rotate, the lead screw (51) drives the lead screw nut (52) to move along the axial direction of the lead screw (51), the lead screw nut (52) drives the retraction assembly (3) and the permanent magnet rotor assembly (42) to move synchronously in the axial direction, the permanent magnet rotor assembly (42) moves relative to the stator sleeve (41) in the axial direction to change the relative area between the permanent magnet rotor assembly (42) and the stator sleeve (41), and the size of the relative area between the permanent magnet rotor assembly (42) and the stator sleeve (41) is proportional to the size of the braking torque of the slow descent belt disc (31).

2. The rock climber's descender as claimed in claim 1, wherein, The retraction assembly (3) comprises: Two spiral spring end covers (32) fixedly connected to the slow descent belt disc (31); A volute spring (33) is located between the two volute spring end covers (32), and a first end of the volute spring (33) is connected to the shell (1), and a second end of the volute spring (33) is connected to the volute spring end cover (32).

3. The rock climber's descender as claimed in claim 2, wherein, A volute spring guide groove (112) is arranged on the inner circumferential wall of the shell (1); A wear-resistant sleeve (331) is arranged on the first end of the volute spring (33), and the wear-resistant sleeve (331) is inserted into the volute spring guide groove (112).

4. The rock climbing descender of claim 1, wherein, When the descender belt (2) is descending, the permanent magnet rotor assembly (42) is connected to the descender belt disc (31), and the descender belt (2) can drive the descender belt disc (31) and the permanent magnet rotor assembly (42) to rotate synchronously; When the descender belt (2) is retracted, the permanent magnet rotor assembly (42) is connected to the descender belt disc (31), and the permanent magnet rotor assembly (42) is stationary; When the descender belt (2) is stationary, the permanent magnet rotor assembly (42) is disconnected from the descender belt disc (31).

5. The rock climber's descender as claimed in claim 1 wherein, The permanent magnet rotor assembly (42) comprises: A permanent magnet rotor frame (421) is rotatably connected to the shell (1), and an inner circumferential wall of an end of the permanent magnet rotor frame (421) is provided with a pawl clamping groove (4211); A permanent magnet rotor (422) is fixed to an outer circumferential wall of the permanent magnet rotor frame (421); The permanent magnet descender assembly (4) further comprises: An annular boss (431) is arranged on an end of the descender belt disc (31), and an outer circumferential wall of the annular boss (431) is provided with a receiving groove (4311); A pawl pushing block (432) is rotatably connected to the receiving groove (4311) through a rotating shaft (433) at one end, a torsional spring (434) is arranged on the rotating shaft (433), and the pawl pushing block (432) can be clamped or disengaged from the pawl clamping groove (4211).

6. The rock climbing descender of claim 1, wherein, The speed regulating assembly (5) further comprises a guide rod body (54) fixedly connected to the shell (1), and the guide rod body (54) is parallel to the lead screw (51); The lead screw nut (52) is arranged on the guide rod body (54) and can move axially relative to the guide rod body (54).

7. The rock climber's descender as claimed in claim 1 wherein, A magnetic attraction piece (55) is arranged on the rotating handle (53), and the rotating handle (53) is detachably connected to a first end of the lead screw (51) through the magnetic attraction piece (55).

8. The rock climber's descender as claimed in claim 1 wherein, A polygonal hole (121) is arranged on a first end of the shell (1); A connecting head (511) is arranged on a first end of the lead screw (51), the connecting head (511) is a cuboid, and the connecting head (511) passes through the polygonal hole (121). The rotating handle (53) is provided with a rectangular groove (531), and a plug-in boss (532) is formed around the groove (531) on the rotating handle (53), and the outer circumferential side wall of the plug-in boss (532) is a polygon; The plug-in boss (532) can be plugged into the polygonal hole (121), and the groove (531) can be plugged into the connecting head (511).

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