A de-coiler recovery deceleration device

By designing a combination of housing, rotating parts, centrifugal blocks, and friction blocks, the deceleration problem of the tube winder at different recovery speeds was solved, and automatic adjustment of friction force was achieved to ensure safe and efficient tube winder recovery.

CN224336909UActive Publication Date: 2026-06-09SHISHANG (HUZHOU) INTELLIGENT TECHNOLOGY CO LTD +1

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHISHANG (HUZHOU) INTELLIGENT TECHNOLOGY CO LTD
Filing Date
2025-06-13
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing deceleration devices for tube winders do not require deceleration during low-speed recovery, and have low deceleration efficiency and high noise during high-speed recovery, leading to safety and efficiency issues.

Method used

A tube rewinding deceleration device was designed, comprising a housing, a rotating component, a centrifugal block, and a friction block. Through the cooperation of the deformable component and the centrifugal block, the friction force is adjusted according to the speed of the tube rewinding disc to achieve automatic deceleration and prevent noise generation.

Benefits of technology

It achieves automatic adjustment of friction at different recycling speeds, ensuring normal recycling while reducing noise, and improving deceleration efficiency and safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of pipe winder recovery deceleration device, including shell, shell has circular inner periphery surface;One end of rotating member is transmission end, transmission end is pivotally inserted in one end of shell, the rotation center of rotating member is collinear with the center of circular inner periphery wall;Another end of rotating member has turntable, and the outer periphery wall of turntable is provided with clamping groove;One end of centrifugal block is rotationally arranged in clamping groove, and another end of centrifugal block can freely move, and the side wall of clamping groove away from another end of centrifugal block extends and forms deformable member, when turntable rotates, deformable member and one end of centrifugal block abut;Friction block is arranged on the outer periphery surface of centrifugal block, and when centrifugal block rotates and opens, friction block and circular inner periphery wall abut.The utility model can realize when pipe reel low-speed recovery, deceleration device does not decelerate and normally recovers;When pipe reel high-speed recovery, centrifugal block is enough to make deformable member plastic deformation, and then drive friction block and shell inner periphery surface abut and generate friction, and then realize deceleration.
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Description

Technical Field

[0001] This utility model relates to the field of tube rewinding technology, and in particular to a tube rewinding deceleration device. Background Technology

[0002] In many work sites, winding devices for retrieving tubular tools are commonly used; these are collectively called tube winders. Currently, automatic tube winders are mainly of two types: spring-driven and motor-driven. Most tube winders, when retrieving tubular items, suffer from uncontrollable winding speed, leading to irregular swinging of the tube ends. This can cause injuries to workers or damage to surrounding objects, posing a safety hazard. Therefore, speed reduction devices are often added.

[0003] Existing deceleration devices have certain drawbacks. For example, when the reel is retracted at low speed, the deceleration device will also work, causing unnecessary deceleration and preventing the reel from being retracted normally. When the reel is retracted at high speed, the deceleration device has insufficient friction to reduce deceleration efficiency and generates a lot of noise. In order to solve these problems, this utility model proposes a deceleration device for retracting a reel. Utility Model Content

[0004] Based on this, in order to solve the problems existing in the prior art, the present invention provides a tube winding retraction deceleration device, comprising:

[0005] A housing having a circular inner circumferential surface;

[0006] A rotating component, one end of which is a transmission end, which is pivotally inserted into one end of the housing. The rotation center of the rotating component is collinear with the center of the circular inner circumferential surface. The other end of the rotating component has a turntable, and the outer circumferential wall of the turntable has a slot.

[0007] A centrifuge block, one end of which is rotatably disposed in the slot, and the other end of which is free to move. The side wall of the slot extends away from the other end of the centrifuge block to form a deformable part.

[0008] A friction block is disposed on the outer circumferential surface of the centrifugal block from one end to the other. When the centrifugal block rotates and opens, the friction block abuts against the inner circumferential surface of the circle.

[0009] Optionally, the centrifuge block includes a main body, a rotating shaft, and a sling block; the main body is L-shaped, the rotating shaft and the sling block are respectively disposed at both ends of the main body, and the rotating shaft is rotatably disposed in the slot;

[0010] The main body has one side of the rotating shaft abutting against the deformable component.

[0011] Optionally, the centrifugal block is further provided with a deformable area, which is disposed on the outer peripheral surface and located between the friction block and the rotating shaft.

[0012] Optionally, the number of the slots, deformable parts, and centrifugal blocks on the turntable are all two, and the two slots, deformable parts, and centrifugal blocks are arranged in a circumferential array on the side wall of the turntable.

[0013] Optionally, the number of turntables is two, and the two turntables are arranged coaxially in sequence;

[0014] The throwing blocks and friction blocks of the two turntables are respectively staggered on the circumference.

[0015] Optionally, there is a gap between the deformable member and the throwing block.

[0016] Optionally, the housing is cylindrical, including a peripheral wall, an opening at one end, and a bottom surface closed at the other end. The circular inner peripheral surface is disposed on the peripheral wall, and a shaft is provided on the bottom surface.

[0017] The turntable has a through connecting hole at its center; the turntable is sleeved onto the shaft through the connecting hole.

[0018] Optionally, it also includes a cover that covers the opening;

[0019] The cover is detachably connected to the side wall of the opening end.

[0020] Optionally, the transmission end passes through the cover and extends outside the cover.

[0021] Optionally, the sling block is detachably mounted to the main body.

[0022] Beneficial effects: This invention features a deformable component at the edge of the slot. When the reel is retracted at low speed, the deformable component ensures the centrifugal block remains in close contact with the turntable, preventing the deceleration device from slowing down and guaranteeing normal retraction. When the reel is retracted at high speed, the centrifugal block causes the deformable component to plastically deform, thereby driving the friction block to abut against the inner circumferential surface of the housing and generating friction, thus achieving deceleration. Furthermore, the contact between the friction block and the housing effectively prevents noise generation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the tube winding recovery deceleration device of this utility model;

[0025] Figure 2 This is a schematic diagram of the rotating component of the retraction deceleration device for the tube winder of this utility model;

[0026] Figure 3 This is another structural schematic diagram of the rotating component of the tube winding recovery deceleration device of this utility model;

[0027] Figure 4 This is a schematic diagram of the centrifugal block in the regeneration and deceleration device of the tube winder of this utility model;

[0028] Figure 5 This is an exploded view of the friction block and centrifugal block of the winding tube recovery deceleration device of this utility model;

[0029] Figure 6 This is an exploded view of the transmission wheel of this utility model on the tube winding recovery and deceleration device;

[0030] Figure 7 This is an exploded view of the housing of the tube winding recovery deceleration device of this utility model;

[0031] Figure 8 This is another structural schematic diagram of the winding tube recovery deceleration device of this utility model.

[0032] In the diagram: 1. Shell; 11. Circular inner circumference; 12. Shaft; 13. Peripheral wall; 14. Opening; 15. Bottom surface; 2. Cover; 3. Rotating component; 31. Turntable; 32. Slot; 33. Deformable component; 34. Connecting hole; 35. Prism; 4. Centrifugal block; 41. Main body; 42. Rotating shaft; 43. Throwing block; 44. Groove; 45. Through hole; 47. Deformable area; 5. Friction block; 51. Cylindrical component; 6. Transmission wheel; 61. Square groove; 62. Bolt.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] The retraction and deceleration device of the pipe winder of this utility model is installed on the outside of the pipe winder support. The pipe winder includes a pipe reel and a support. The device is connected to the gear on the pipe reel through a transmission component.

[0038] The component to be wound in this invention is a flexible hose for transmitting gas or liquid, an electrical wire, or a warning tape, etc.

[0039] like Figures 1-8 As shown, this utility model embodiment provides a tube winding recovery deceleration device, including a housing 1, a rotating component 3, a centrifugal block 4, and a friction block 5. The housing 1 has a circular inner circumferential surface 11 and is cylindrical; one end of the rotating component 3 is a transmission end, which is pivotally inserted into one end of the housing 1, and the rotation center of the rotating component 3 is collinear with the center of the circular inner circumferential surface 11; the other end of the rotating component 3 has a turntable 31, and the outer circumferential wall of the turntable 31 has a slot 32; one end of the centrifugal block 4 is rotatably disposed in the slot 32, and the other end of the centrifugal block 4 can move freely, and the centrifugal block 4 has an outer circumferential surface from one end to the other end; the side wall of the slot 32 away from the other end of the centrifugal block 4 extends to form a deformable component 33, and when the turntable 31 rotates, the deformable component 33 abuts against one end of the centrifugal block 4; the friction block 5 is disposed on the outer circumferential surface of the centrifugal block 4, and when the centrifugal block 4 rotates and opens, the friction block 5 abuts against the circular inner circumferential surface 11.

[0040] In this embodiment, the axes of the housing 1 and the rotating component 3 coincide; the deformable component 33 is made of plastic. In the initial state, the centrifugal block 4 is tightly attached to the turntable 31, and the deformable component 33 is rotatably mounted on one end of the centrifugal block 4 within the slot 32. When the winding device is retracted at low speed, due to the presence of the deformable component 33, the centrifugal force of the throwing block 43 is insufficient to deform the deformable component 33, keeping the centrifugal block 4 tightly attached to the turntable 31. The friction block 5 does not contact the circular inner circumferential surface 11 of the housing 1, ensuring normal retraction of the winding device. When the winding speed is high, the drive transmission end rotates. At this time, the turntable 31 rotates at a high speed, and the centrifugal force of the swing block 43 is sufficient to cause the deformable part 33 to undergo plastic deformation. Under the action of centrifugal force, the centrifugal block 4 will open away from the turntable 31, driving the friction block 5 to approach the circular inner circumferential surface 11 of the housing 1, and generating friction with the circular inner circumferential surface 11 of the housing 1. Under the action of this friction, the rotation speed of the rotating part 3 will gradually decrease, and the reverse drive winding disc will decelerate, achieving the purpose of deceleration. During this process, the centrifugal block 4 does not directly contact the circular inner circumferential surface 11 of the housing 1, but instead drives the friction block 5 to contact the housing 1. The centrifugal block 4 will apply pressure to the friction block 5, making the friction block 5 tightly adhere to the circular inner circumferential surface 11 of the housing 1, improving the deceleration efficiency. In addition, the contact between the friction block 5 and the housing 1 can effectively prevent the generation of noise.

[0041] Specifically, the centrifugal block 4 includes a main body 41, a rotating shaft 42, and a sling block 43. The main body 41 is L-shaped, and the rotating shaft 42 and the sling block 43 are respectively disposed at both ends of the main body 41. The rotating shaft 42 is rotatably disposed within a slot 32. The edge of the slot 32 away from the sling block 43 has a deformable member 33, which abuts against the side of the main body 41 where the rotating shaft 42 is disposed. In this embodiment, when the centrifugal block 4 is in close contact with the turntable 31, the deformable member 33 abuts against the side of the main body 41 where the rotating shaft 42 is disposed. When the friction block 5 is disposed on the centrifugal block 4, it partially protrudes from the circumference of the centrifugal block 4. In this embodiment, the rotating shaft 42 is cylindrical, and the sling block 43 is cylindrical or spherical. The turntable 31 is connected to the short side end of the main body 41, and the deformable member 33 abuts against the short side of the main body 41. The sling block 43 is detachably connected to the long side end of the main body 41, which causes the center of gravity of the centrifugal block 4 to shift towards the sling block 43. The sling block 43 can be selected according to the needs of centrifugal force.

[0042] Specifically, the friction block 5 is disposed at one end of the main body 41 near the rotating shaft 42. In this embodiment, by disposing of the friction block 5 at one end of the centrifugal block 4 near the rotating shaft 42, the friction block 5 is positioned away from the end of the centrifugal block 4's swing block 43. As a result, when the centrifugal block 4 rotates, the friction block 5 is subjected to a greater force. This allows the friction block 5 to better and more easily contact the housing 1, making the friction between the two more reliable, thus making the deceleration more reliable and further improving the deceleration effect.

[0043] refer to Figure 4 , Figure 5 The main body 41 has symmetrical grooves 44 on both sides of its long side, and a through hole 45 is opened between the two grooves 44 on the long side of the main body 41. The friction block 5 has a cavity that runs through both sides, and the cavity has a cylindrical part 51. The friction block 5 is installed on the centrifugal block 4 by injection molding, so that the cylindrical part 51 extends into the through hole 45. The setting of the cylindrical part 51 makes the friction block 5 more stable and firm.

[0044] During operation, when the winding device retracts at low speed, the centrifugal force of the deformable component 33 is insufficient to deform it due to the presence of the deformable component 33. This ensures that the centrifugal block 4 remains in close contact with the turntable 31, and the friction block 5 does not contact the inner circular surface 11 of the housing 1, guaranteeing normal winding device retraction. When the winding device reaches a higher speed, the drive transmission end rotates. At this time, the turntable 31 rotates at a higher speed, and the centrifugal force of the deformable component 33 is sufficient to cause plastic deformation. Under the action of centrifugal force, the centrifugal block 4 opens away from the turntable 31, causing the friction block 5 to approach the inner circular surface 11 of the housing 1 and generate friction by contacting it. Under the action of this friction, the rotation speed of the rotating component 3 gradually decreases, and the reverse transmission of the winding device slows down, achieving the purpose of deceleration. During this process, the centrifugal block 4 does not directly contact the inner circular surface 11 of the housing 1, but instead drives the friction block 5 to contact the housing 1. The centrifugal block 4 applies pressure to the friction block 5, causing the friction block 5 to adhere tightly to the inner circular surface 11 of the housing 1, thereby improving deceleration efficiency. In addition, the contact between the friction block 5 and the housing 1 effectively prevents the generation of noise.

[0045] Specifically, the centrifugal block 4 also has a deformable region 47, which is located on its outer peripheral surface between the friction block 5 and the rotating shaft 42. The deformable region 47 is made of plastic. (Reference) Figure 3The deformable zone 47 is located on the long side of the main body 41 and between the friction block 5 and the corner between the long and short sides of the main body 41. When the speed of the winding device is high, the deformable zone 47 and / or the deformable component 33 undergo plastic deformation. The thickness of the deformable component 33 and the deformable zone 47 needs to be designed according to the actual situation. On the one hand, if it is too thick, deformation may not occur, and if it is too thin, deformation may fail. On the other hand, the range of motion of the centrifugal block 4 under centrifugal force is insufficient to cause permanent deformation of the deformable zone 47 and / or the deformable component 33. Commonly used plastics such as polyamide (PA) or polyoxymethylene (POM) can meet the requirements for the deformable zone 47 and / or the deformable component 33. Centrifugal force will cause the deformable zone 47 and / or the deformable component 33 to undergo plastic deformation. The friction force generated by the friction block contacting the circular inner circumferential surface 11 of the shell 1 plays a role in slowing down the winding device's recovery. The deformations generated by the deformable zone 47 and the deformable component 33 complement each other. When the deformation generated by the deformable zone 47 is insufficient to allow the friction block 5 to contact the circular inner circumferential surface 11 of the housing 1 and generate friction, the deformable component 33 deforms to supplement the deformation generated by the deformable zone 47, thereby allowing the friction block 5 to contact the circular inner circumferential surface 11 of the housing 1 and generate friction, which plays the role of slowing down the retraction of the tube winder; similarly, when the deformation generated by the deformable component 33 is insufficient, the deformable zone 47 will also supplement it, thus increasing the friction between the friction block 5 and the circular inner circumferential surface 11 and ensuring the deceleration effect.

[0046] Specifically, each turntable 31 has two slots 32, two deformable parts 33, and two centrifugal blocks 4, and these two slots 32, deformable parts 33, and centrifugal blocks 4 are arranged in a circular array on the side wall of the turntable 31. (Reference) Figure 3 The turntable 31 is a cylinder with a centrally symmetrical cross-section. Two slots 32 and two deformable parts 33 are respectively located at both ends of the centrally symmetrical cylinder. The slots 32 and deformable parts 33 at both ends are centrally symmetrically arranged. Two centrifugal blocks 4 are centrally symmetrically arranged on the turntable 31. The long side of the main body 41 is bent into an arc shape towards the central axis, so that the throwing block 43 is close to the turntable 31, making the structure more compact. There is a gap between the deformable part 33 and the throwing block 43 of the centrifugal block 4 located in the other slot 32. (Refer to...) Figure 3 The radial cross-section of the deformable part 33 is Y-shaped with the groove edge, which facilitates the injection molding process; at the same time, the radial cross-section of the deformable part 33 is L-shaped, which can improve the strength of the long side of the deformable part 33 to ensure the stability and service life of the device, such as... Figure 1 As shown, the long side of the L-shaped deformable part 33 abuts against the short side of the centrifugal block 4 disposed in the slot 32, and there is a gap between its short side and another centrifugal block 4. In this way, when the deformable part 33 deforms, it will not come into contact with the other centrifugal block 4, thus not affecting the opening or retraction of the centrifugal block 4.

[0047] Specifically, there are two turntables 31, which are coaxially arranged sequentially. The throwing blocks 43 and friction blocks 5 of the two turntables 31 are staggered around each other on the circumference. (Reference) Figure 3 Figure 4 shows that the slots 32 and deformable parts 33 of the two different turntables 31 are staggered on the circumference, so that the four slots 32 and four deformable parts 33 on the two turntables 31 are evenly distributed on the circumference along their axial projection. This allows the centrifugal block 4 to be installed in the slots 32 of the different turntables 31. The throwing block 43 and the friction block 5 set on the centrifugal block 4 are staggered, so that the four throwing blocks 43 and four friction blocks 5 are evenly distributed on the circumference along the axial projection of the turntable 31. This arrangement makes the centrifugal block 4 more uniformly subjected to centrifugal force, has better stability, and has a better deceleration effect. In addition, two turntables are set up with a total of four centrifugal blocks 4 and four friction blocks 5. Two centrifugal blocks 4 and two friction blocks 5 are set on each of the two turntables. Compared with only one turntable with four centrifugal blocks 4 and four friction blocks 5 on the same turntable, the centrifugal block 4 in this utility model has a greater distance from the rotating shaft 42, that is, the main body 41 is longer, which generates a greater centrifugal force and causes the friction block 5 to abut against the inner circumferential surface 11, resulting in a greater friction force and a better deceleration effect. At the same time, the deceleration device can be made smaller in the radial direction.

[0048] Specifically, the shell 1 is cylindrical, including a peripheral wall 13, an opening 14 at one end, and a closed bottom surface 15 at the other end. A shaft 12 is provided on the bottom surface 15, extending towards the opening end. A through connecting hole 34 is provided in the center of the turntable 31, and the turntable 31 is fitted onto the shaft 12 through the connecting hole 34. The drive transmission end drives the rotating component 3 to rotate around the shaft 12. The shaft provides support and limits, making the rotation more stable. This results in a more uniform centrifugal force on the centrifugal block 4, better stability, and a better deceleration effect.

[0049] Specifically, it also includes a cover body, which covers the opening 14; the cover body 2 is detachably connected to the side wall of the opening 14 of the housing 1, such as by bolts 62, to facilitate the installation and removal of the rotating part 3, the centrifugal block 4 and the friction block 5.

[0050] Specifically, the centrifugal block 43 is detachably connected to the long side end of the main body 41, which causes the center of the centrifugal block 4 to shift towards the centrifugal block 43. The centrifugal block 43 can be selected according to the centrifugal force requirements; for example... Figure 4 The main body 41 has a cylindrical cavity at its long side end, and the swing block 43 is embedded in the cylindrical cavity.

[0051] Specifically, the transmission end penetrates through the cover 2 and extends outside the cover 2. The cover 2 is disc-shaped, with a hole in the center of the cover 2, through which the transmission end extends to the other end of the cover 2; it also includes a transmission wheel 6, which is sleeved on the other end of the cover 2 where the transmission end is located.

[0052] In this embodiment, the transmission end is a prism 35 with a square cross-section, and the transmission wheel 6 is provided with a square groove 61 that matches the prism 35. The transmission end is placed in the square groove 61 and connected by bolts 62. The transmission wheel 6 is a gear, or optionally, a friction wheel. By setting the transmission wheel 6, the rotating part is connected to the winding reel of the tube winder.

[0053] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A deceleration device for retracting a tube winder, characterized in that, include: A housing having a circular inner circumferential surface; A rotating component, one end of which is a transmission end, which is pivotally inserted into one end of the housing, the rotation center of the rotating component is collinear with the center of the circular inner circumferential surface; the other end of the rotating component has a turntable, and the outer circumferential wall of the turntable is provided with a slot. A centrifuge block, one end of which is rotatably disposed in the slot, and the other end of which is freely movable, the centrifuge block having an outer peripheral surface from one end to the other; the side wall of the slot away from the other end of the centrifuge block extends to form a deformable member, and when the turntable rotates, the deformable member abuts against one end of the centrifuge block; A friction block is disposed on the outer peripheral surface. When the centrifugal block rotates and opens, the friction block abuts against the inner circular peripheral surface.

2. The winding retraction deceleration device according to claim 1, characterized in that, The centrifuge block includes a main body, a rotating shaft, and a throwing block; the main body is L-shaped, the rotating shaft and the throwing block are respectively disposed at both ends of the main body, and the rotating shaft is rotatably disposed in the slot; The main body has one side of the rotating shaft abutting against the deformable component.

3. The winding retraction deceleration device according to claim 2, characterized in that, The centrifugal block is further provided with a deformable area, which is disposed on the outer peripheral surface and located between the friction block and the rotating shaft.

4. The tube winding retraction deceleration device according to claim 1, characterized in that, The turntable has two slots, two deformable parts, and two centrifugal blocks, and the two slots, two deformable parts, and two centrifugal blocks are arranged in a circumferential array on the side wall of the turntable.

5. The winding retraction deceleration device according to claim 3, characterized in that, The number of turntables is two, and the two turntables are arranged coaxially in sequence; The throwing blocks and friction blocks of the two turntables are respectively staggered on the circumference.

6. The winding retraction deceleration device according to claim 3, characterized in that, There is a gap between the deformable component and the throwing block.

7. The winding retraction deceleration device according to claim 4, characterized in that, The shell is cylindrical, including a peripheral wall, an opening at one end and a bottom surface closed at the other end. The circular inner peripheral surface is disposed on the peripheral wall, and a shaft is provided on the bottom surface, with the shaft extending toward the opening. The two turntables have a through-hole at their center, and the turntables are fitted onto the shaft through the through-hole.

8. The winding retraction deceleration device according to claim 7, characterized in that, It also includes a cover that covers the opening.

9. The winding retraction deceleration device according to claim 8, characterized in that, The transmission end passes through the cover and extends out of the cover body.

10. The tube winding retraction deceleration device according to claim 2, characterized in that, The sling block is detachably mounted on the main body.