hoist

Abstract

This utility model provides a winch that meets the requirements of high-precision operation. The winch includes a frame, a drum, a reducer, and a driver. The frame includes a support plate; the drum includes a spindle and two turntables, the spindle is rotatably mounted on the frame, the two turntables are fixed to the spindle and spaced apart from each other, each turntable has a cable groove along the circumferential direction, and each cable groove is used to wind a single cable; the reducer is mounted on the support plate, and the reducer includes a transmission mechanism, the drum being driven by the transmission mechanism; the driver is mounted on the reducer, and the driver drives the drum to rotate through the transmission mechanism.

Description

Technical Field

[0001] This utility model relates to a winch. Background Technology

[0002] Winches typically use a drum to wind a steel wire rope to lift heavy objects vertically or pull them horizontally or at an angle. They are a common type of machinery used in modern industry, construction, and transportation. However, these general-purpose winches are difficult to meet the requirements of high-precision operations, such as nuclear power plant maintenance and precision assembly of aerospace vehicles, where the handling of heavy objects requires precise attitude control and positioning accuracy. Summary of the Invention

[0003] Therefore, the purpose of this utility model is to provide a winch that can meet the requirements of high-precision operation, in order to address the shortcomings of the above-mentioned related technologies.

[0004] To solve the above problems, the present invention adopts the following technical solution: A winch includes a frame, a drum, a reducer, and a driver. The frame includes a support plate; the drum includes a spindle and two turntables, the spindle being rotatably mounted on the frame, the two turntables being fixed to the spindle and spaced apart from each other, each turntable having a cable groove along its circumference for winding a single cable in each cable groove; the reducer is mounted on the support plate, the reducer including a transmission mechanism, and the drum being drively connected to the transmission mechanism; the driver is mounted on the reducer, and the driver drives the drum to rotate via the transmission mechanism.

[0005] According to some embodiments of the present invention, the reel further includes a spacer cylinder, which is sleeved outside the mandrel and fixedly connected between the two turntables; and / or the width of the cable groove along the axial direction of the mandrel is equal to or greater than the diameter of the cable by 0.1-1.5 mm.

[0006] According to some embodiments of the present invention, the turntable includes a first disc and a second disc arranged opposite to each other, and a connecting disc connected between the first disc and the second disc, wherein the connecting disc is located near the center of the first disc and the second disc, and the annular space defined by the first disc, the connecting disc and the second disc is the cable groove, and the length of the connecting disc along the spindle is the width of the cable groove.

[0007] According to some embodiments of this utility model, the connecting plate is provided with a hanging hole, and the end of the cable is fixed with a fastening member, which cooperates with the hanging hole.

[0008] According to some embodiments of the present invention, the mounting hole includes a first hole segment and a second hole segment connected to each other, the diameter of the first hole segment being smaller than that of the second hole segment; the second hole segment extends outward to the outer edge of the first disc and the second disc; the fastening member includes a sleeve fixed to the cable and a limiting ball connected to the end of the sleeve, the diameter of the limiting ball being larger than that of the sleeve.

[0009] According to some embodiments of the present invention, the transmission mechanism is a two-stage worm gear transmission mechanism, including a rotatable first worm and a second worm, as well as a first worm wheel and a second worm wheel. The first worm is connected to the driver, the first worm wheel is fixedly installed on the second worm and cooperates with the first worm, and the second worm wheel is installed on the spindle and cooperates with the second worm.

[0010] According to some embodiments of the present invention, the reducer includes a housing fixed to the support plate or integrally formed with the support plate, and a side cover installed on one side of the housing. The transmission mechanism is installed within the space enclosed by the housing and the side cover.

[0011] According to some embodiments of this utility model, the winch further includes a cable guiding mechanism, which includes two inserts and two wire ends. The two inserts are detachably mounted on the support plate and correspond to the two turntables respectively. Two threaded ends are respectively located below two inserts. Each insert includes a hollow head located above the support plate and a cylindrical portion located below the support plate. A first guide wheel is mounted on the head, and a second guide wheel is mounted inside the cylindrical portion. The first guide wheel, the second guide wheel, and the turntable are located in the same plane, and the spindle of the turntable, the axle of the first guide wheel, and the axle of the second guide wheel are parallel to each other. Each threaded end has a through hole extending vertically, comprising an upper section and a lower section. A blocking ball is located in the lower section, and the diameter of the blocking ball is larger than the diameter of the upper section. The blocking ball has a through hole, and another clamping member fixed to the other end of the cable is attached to the through hole of the blocking ball.

[0012] According to some embodiments of the present invention, the winch further includes a damper, which includes a housing, a damping element, and an elastic element. The housing is installed on the head of the boot, a portion of the damping element is disposed inside the housing and is movable relative to the housing, and the elastic element is pre-compressed and disposed between the housing and the damping element. Under the elastic action of the elastic element, the damping element can abut the cable against the first guide wheel.

[0013] According to some embodiments of the present invention, a connecting pipe is also included, the driver is a bidirectional pneumatic motor, and the connecting pipe is connected to the air passage inside the bidirectional pneumatic motor through a rotary joint.

[0014] The winch of this invention features two independent turntables spaced apart, each with a single cable groove. Only one cable can be wound in each groove. Therefore, during operation, both cables remain wound or extended within their respective grooves, preventing tangling and ensuring consistent cable lengths. Furthermore, since cable winding and unwinding occur within independent grooves with fixed widths matching the cable lengths, the extension lengths of both cables are easily controlled and precisely aligned. This effectively prevents the lifted load from tilting, maintaining its posture and ensuring precise positioning. Thus, the winch of this invention meets the requirements for high-precision operations. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the winch of this utility model; Figure 2 This is a three-dimensional structural diagram of the frame of the winch of this utility model; Figure 3 This is a three-dimensional structural diagram of the drum of the winch of this utility model at an angle; Figure 4 This is a three-dimensional structural diagram of the drum of the winch of this utility model from another angle. In order to show the internal structure of the turntable, a second disc of one of the turntables has been removed. Figure 5 yes Figure 1 Sectional view along line AA; Figure 6 A three-dimensional structural schematic diagram of the damper of the winch of this utility model is shown; Figure 7 A three-dimensional structural schematic diagram of the transmission mechanism and driver of the winch of this utility model is shown; Figure 8 This is a front view of the drive unit of the winch of this utility model, wherein the connecting pipe is in a vertical position; Figure 9This is a front view of the drive unit of the winch of this utility model, wherein the connecting pipe is in a horizontal position.

[0017] In the diagram: 1. Frame; 11. Support plate; 110. Weight reduction hole; 111. Reinforcing rib; 113. Plug-in hole; 12. First upright plate; 13. Second upright plate; 15. Handle; 2. Drum; 21. Mandrel; 22. Turntable; 200. Cable trough; 201. First hole section; 202. Second hole section; 220. Central through hole; 221. First reel; 222. Second reel; 223. Connecting reel; 23. Spacer cylinder; 230. Weight reduction hole; 300. Cable; 301. Sleeve; 302. Limiting ball; 31. 311. Head; 312. Inner cylinder; 313. Convex ring; 314. Rib plate; 32. Cylinder section; 33. First guide wheel; 34. Second guide wheel; 3. Shoe; 4. Thread end; 41. Upper hole section; 42. Lower hole section; 43. Blocking ball; 5. Reducer; 51. Housing; 52. Side cover; 54. First worm; 55. Second worm; 56. First worm wheel; 57. Second worm wheel; 6. Driver; 61. Connecting pipe; 62. Rotary joint; 7. Damper; 71. Outer shell; 72. Damping element; 73. Elastic element. Detailed Implementation

[0018] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0019] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, methods, products, or devices.

[0020] Unless otherwise defined, the terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. The terms “comprising” or “including” and similar terms mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0021] In the embodiments shown in the accompanying drawings, directional representations such as up, down, left, right, front, back, top, bottom, etc., are not absolute but relative, used to explain the structure and movement of different components in this disclosure. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, then these representations are considered to change accordingly.

[0022] See Figure 1 The winch of this utility model includes: frame 1, drum 2, cable guide mechanism, reducer 5 and driver 6.

[0023] See Figure 2 The frame 1 includes a support plate 11, a first upright plate 12, and a second upright plate 13, wherein the first upright plate 12 and the second upright plate 13 are respectively fixed to opposite sides of the support plate 11. The first upright plate 12, the second upright plate 13, and the support plate 11 are integrally formed, with strong integrity and good structural strength. To reduce weight, the support plate 11 is provided with weight-reducing holes 110. In addition, the support plate 11 is also provided with insertion holes 113. To improve the supporting strength of the frame 1, the support plate 11 is provided with reinforcing ribs 111. In this embodiment, the reinforcing ribs 111 are in the shape of a cross, and the weight-reducing holes 110 and insertion holes 113 are respectively located on the support plate 11 in areas that avoid the reinforcing ribs 111, thus ensuring that the frame 1 has sufficient strength while reducing weight. A handle 15 is installed on one side of the support plate 11.

[0024] See Figure 3 and Figure 4 The drum 2 includes a spindle 21 (see...) Figure 5 ), spacer cylinder 23 and two turntables 22, the two ends of the spindle 21 are rotatably mounted on the first upright plate 12 and the second upright plate 13 of the frame 1 (see Figure 2 Between the two turntables 22, two turntables 22 are respectively fixed to the mandrel 21, and a spacer cylinder 23 is fixedly connected between the two turntables 22 and sleeved on the outside of the mandrel 21. The spacer cylinder 23 is provided with weight-reducing holes 230 to reduce the weight of the drum 2. In this embodiment, the spacer cylinder 23 and the two turntables 22 are an integral structure. In some other embodiments, the spacer cylinder 23 may also be an independent structure, fixedly connected to the turntables 22 by welding or other means.

[0025] The turntable 22 includes a first turntable 221 and a second turntable 222 arranged opposite to each other, and a connecting turntable 223 fixed between the first turntable 221 and the second turntable 222. The connecting turntable 223 is located near the center of the first turntable 221 and the second turntable 222, and away from their outer peripheries. Therefore, the first turntable 221, the connecting turntable 223, and the second turntable 222 together define an annular space, which is the cable groove 200. The length of the connecting turntable 223 along the spindle 21 is equal to the width W of the cable groove 200. This width W is equal to the diameter of the cable (e.g., steel wire rope) 300, so only a single cable 300 can be wound within the cable groove 200. In another embodiment, the width W of the cable groove 200 is slightly larger than the diameter of the cable 300 by 0.1-1.5 mm, which helps reduce friction between the sides of the cable 300 and the cable groove 200, making it easier to wind the cable 300 within the cable groove 200. The turntable 22 has a central through hole 220 and is fixedly connected to the spindle 21 at the central through hole 220.

[0026] The winch of this invention is equipped with two independent turntables 22, with a certain interval between them. Each turntable 22 has a single cable groove 200 with a diameter equivalent to that of the cable 300. Only a single cable 300 is wound in each cable groove 200. Therefore, during the operation of the winch, both cables 300 are wound or extended in their respective cable grooves 200, and they will not become disordered or entangled with each other. This avoids the problem of different extension lengths of the two cables due to cable disorder. When the two cables 300 extend from their respective cable grooves 200, the extension length can be kept consistent, thereby preventing the lifted load from tilting and keeping the load's posture unchanged. This enables precise positioning, so the winch of this invention can meet the requirements of high-precision operation.

[0027] See Figure 4 and Figure 5 The turntable 22 has a mounting hole in the connecting plate 223, and the end of the cable 300 is fixed with a clip, which cooperates with the mounting hole.

[0028] In detail, the mounting hole includes a first hole segment 201 and a second hole segment 202 connected to each other. The diameter of the first hole segment 201 is smaller than that of the second hole segment 202. The second hole segment 202 extends outward to the outer edge of the first reel 221 and the second reel 222. The clamping member at the end of the cable 300 includes a sleeve 301 and a limiting ball 302 connected to the end of the sleeve 301. The two can be integrally formed. The diameter of the limiting ball 302 is larger than the diameter of the sleeve 301, and the sleeve 301 is fitted and fixed to the end of the cable 300.

[0029] See Figure 5When the cable 300 is coiled in the cable groove 200, the sleeve 301 of the clamping member at the end of the cable 300 is engaged with the first hole section 201 of the hanging hole, and the limiting ball 302 of the clamping member is engaged with the second hole section 202 of the hanging hole, thereby fixing the clamping member of the cable 300 to the hanging hole and preventing the cable 300 from slipping off.

[0030] See Figure 1 and Figure 5 The cable guiding mechanism of this utility model includes two inserts 3 and two thread ends 4. The two inserts 3 are detachably mounted on the support plate 11 and correspond to the two turntables 22 respectively; the two thread ends 4 are respectively located below the two inserts 3.

[0031] The boot 3 includes a hollow head 31 located on the support plate 11 and a cylindrical part 32 located below the support plate 11, as well as a first guide wheel 33 and a second guide wheel 34.

[0032] The head 31 includes an inner cylinder 311, a protruding ring 312, and multiple stiffening plates 313. The inner cylinder 311 and the cylindrical part 32 are aligned vertically, i.e., their center lines coincide. The protruding ring 312 is fixed to the lower end of the inner cylinder 311 and protrudes outward. The multiple stiffening plates 313 are fixed to the inner cylinder 311 and the protruding ring 312 and are distributed circumferentially along the inner cylinder 311. The cylindrical part 32 is inserted into the insertion hole 113 of the support plate 11 (see...). Figure 2 Then, the protruding ring 312 is fastened to the support plate 11 with bolts, etc., to complete the installation of the insert shoe 3.

[0033] The head 31 is equipped with a first guide wheel 33. Specifically, in this embodiment, an axle 331 is installed between two adjacent stiffeners 313, and the first guide wheel 33 is rotatably mounted on the axle 331. The inner cylinder 311 has a notch at the position corresponding to the first guide wheel 33, and the first guide wheel 33 extends into the inner cylinder 311 through the notch.

[0034] A second guide wheel 34 is installed inside the cylindrical portion 32. Specifically, in this embodiment, a wheel axle 341 is installed at the lower end of the cylindrical portion 32, and this wheel axle 341 is perpendicular to the center line X of the cylindrical portion 32. The second guide wheel 34 is rotatably mounted on the wheel axle 341.

[0035] The outer surface of the threaded end 4 is threaded, and the threaded end 4 has a through hole extending through its upper and lower ends. The through hole includes an upper section 41 with a smaller diameter and a lower section 42 with a larger diameter. A blocking ball 43 is provided in the lower section 42, and the diameter of the blocking ball 43 is larger than that of the upper section 41. The blocking ball 43 has a through hole, and the clamping member fixed to the lower end of the cable 300 is hooked into the through hole of the blocking ball 43. The blocking ball 43 hooks and fixes the cable 300, which can prevent the cable 300 from slipping off.

[0036] The top end of the wire head 4 has a tapered opening, and the bottom end of the bobbin 32 has a bevel that matches the tapered opening, so as to increase the contact area between the wire head 4 and the bobbin 32.

[0037] The first guide wheel 33, the second guide wheel 34 and the turntable 22 are located in the same plane, and the axle 331 of the first guide wheel 33, the axle 341 of the second guide wheel 34 and the spindle 21 of the turntable 22 are parallel to each other.

[0038] See Figure 5 and Figure 6 This embodiment also includes a damper 7, which includes a housing 71, a damping element 72, and an elastic element 73.

[0039] The outer casing 71 is installed on the head 31 of the boot 3. Specifically, the outer casing 71 has an opening and a fixing part that protrudes radially outward. The fixing part is installed on the stiffening plate 313 of the head 31 by fasteners such as bolts.

[0040] A portion of the damping element 72 is disposed within the housing 71 and is movable relative to the housing 71. The elastic element 73 may be a compression spring, disposed between the housing 71 and the damping element 72. Figure 5 As shown, the crimping end of the protruding housing 71 of the damping element 72 is plate-shaped to facilitate insertion into the first guide wheel 33 to abut against the cable 300. The compression spring has a certain pre-compression amount; therefore, under the action of the compression spring, the crimping end of the damping element 72 applies a resisting force to the cable 300, pressing the cable 300 against the first guide wheel 33. The cable 300 must overcome this resisting force to move. Therefore, even when the cable 300 is unloaded, the damper 7 can still maintain the tension of the cable 300 and the drum 2, ensuring that the cable 300 does not slack. This function helps the cable 300 extend to the same length when unwound. Furthermore, by adjusting the compression amount of the compression spring, the resisting force of the damping element 72 on the cable 300 can be adjusted to a suitable range.

[0041] See Figure 5 One end of the cable 300 is secured to the hook hole in the center of the turntable 22. After the cable 300 is coiled in the cable groove 200 of the turntable 22, the other end of the cable 300 and its elastic clip are guided by the first guide wheel 33 and the second guide wheel 34, and then pass through the through hole of the thread end 4 and the through hole of the blocking ball 43. The blocking ball 43 then engages with the clip at the other end of the cable 300 for a limiting fit. The cable 300 is very easy to secure and replace.

[0042] In this invention, each of the two fixed-width cable grooves 200 of the two turntables 22 is wound with a cable 300. The two ends of each cable 300 are respectively fixed to the hook hole of the turntable 22 and the through hole of the blocking ball 43 by the clamping parts. As long as the lengths of the two cables 300 are the same, the lengths of extension or shortening will also be the same during the operation of lifting heavy objects. The positioning is accurate and suitable for occasions with high precision operation requirements, such as the lifting of the master manhole cover of the primary side of the steam generator (SG) of a nuclear power plant.

[0043] See Figure 1 and Figure 2 In this embodiment, the reducer 5 includes a housing 51, a side cover 52, and a transmission mechanism.

[0044] The housing 51 and the support plate 11 are an integral structure, that is, the housing 51 and the frame 1 are integrated into one unit, which optimizes the structure. Of course, in other embodiments, the housing 51 can also be an independent structure, which is fixed to the support plate 11 by welding, riveting or other means. The outer side of the housing 51, that is, the side away from the drum 2, has an opening, and the side cover 52 is installed at the opening of the housing 51.

[0045] like Figure 2 As shown, in this embodiment, the second vertical plate 13 for supporting the spindle 21 of the drum 2 constitutes part of the housing 51 of the reducer 5. In other words, the spindle 21 is installed between the housing 51 of the reducer 5 and the first vertical plate 12. The advantage of this design is that, on the one hand, it helps to reduce the weight of the winch; on the other hand, it makes the winch structure compact and small in size; at the same time, one end of the spindle 21 can be directly inserted into the housing 51 of the reducer 5 and connected to the transmission mechanism inside the housing 51. The transmission distance is short and the vibration is small, which helps to improve the operating accuracy of the winch.

[0046] The transmission mechanism of the reducer 5 is installed within the space enclosed by the housing 51 and the side cover 52. For example... Figure 7 As shown, the transmission mechanism is a two-stage worm gear transmission mechanism, including a first worm 54, a second worm 55, a first worm wheel 56, and a second worm wheel 57. The first worm 54 and the second worm 55 are spatially intersecting and rotatably mounted on the housing 51. The first worm wheel 56 is mounted on the second worm 55, and the second worm wheel 57 is mounted on the spindle 21. The first worm wheel 56 works in conjunction with the first worm 54, and the second worm wheel 57 works in conjunction with the second worm 55. The first worm 54 is connected to the output shaft of the driver 6.

[0047] When the winch of this invention is working, the driver 6 drives the first worm 54 to rotate in one direction, for example, counterclockwise. The first worm wheel 56, which works in cooperation with the first worm 54, rotates. The second worm 55, which is fixedly connected to the first worm wheel 56, rotates accordingly. The second worm wheel 57, which works in cooperation with the second worm 55, rotates. The spindle 21, which is fixedly connected to the second worm wheel 57, rotates. The drum 2, which is fixedly installed on the spindle 21, rotates, causing the cable 300 to gradually wind into the cable groove 200 of the drum 2, and the load is lifted. Similarly, when the driver 6 drives the first worm 54 to rotate in the opposite direction, for example, clockwise, the cable 300 extends out of the cable groove 200, and the load descends.

[0048] The winch of this invention adopts a worm gear transmission mechanism, which has a compact structure and can realize a self-locking function, thereby improving the operational safety of the winch. The use of a double-stage worm gear transmission mechanism can not only realize the rotation of the output shaft, which is conducive to miniaturization, but also increase the reduction ratio, which helps to meet the needs of high-precision operation.

[0049] In some other embodiments, the above-described two-stage worm gear transmission mechanism can also be replaced by a multi-stage gear transmission mechanism.

[0050] See Figure 7 The actuator 6 in this invention uses a bidirectional pneumatic motor, which can supply power in both directions, allowing the drum 2 to rotate in both directions, completing the winding and unwinding of the cable 300, and realizing the lifting of heavy objects. The bidirectional pneumatic motor provides smooth power without overshoot, making it easier to control. At the same time, the bidirectional pneumatic motor outputs high torque while being lighter in weight.

[0051] See Figure 8 and Figure 9 This invention also includes a connecting pipe 61 for connecting to an air source. The connecting pipe 61 can be connected to the air passage inside the bidirectional pneumatic motor via a rotary joint 62. The connecting pipe 61 can rotate within a range of 0-90 degrees. Figure 8 This shows the state where the connecting pipe 61 is perpendicular to the centerline of the bidirectional pneumatic motor. Figure 9 The diagram shows the connecting pipe 61 parallel to the centerline of the bidirectional pneumatic motor. The connecting pipe 61 can rotate freely and will sway accordingly when bumped or encountering obstacles, preventing damage. Furthermore, a centralized connector can be created, allowing the connecting pipes 61 to be more concentrated and occupying less space.

[0052] The winch of this utility model is designed for high-precision operation and effectively solves the problems of inaccurate positioning and easy deviation of posture when general winches lift heavy objects. It is particularly suitable for the installation and maintenance of key components in nuclear power plants, such as the hoisting of the primary side master manhole cover of the steam generator (SG) in nuclear power plants, as well as precision hoisting occasions with extremely high requirements for safety and reliability, such as aerospace assembly.

[0053] The foregoing specification and examples provide a complete description of the structure and use of the illustrative embodiments. While certain embodiments have been described above with some degree of specificity or by reference to one or more individual embodiments, those skilled in the art can make many modifications to the disclosed embodiments without departing from the scope of the invention. Therefore, the various illustrative embodiments of products, apparatus, and methods are not intended to limit them to the specific forms disclosed. Rather, they include all modifications and alternatives falling within the scope of the claims, and embodiments other than those shown may include some or all of the features of the depicted embodiments. For example, elements may be omitted or combined as a single structure, and / or connections may be substituted. Furthermore, where appropriate, aspects of any of the foregoing embodiments may be combined with aspects of any of the other embodiments to form further embodiments having comparable or different characteristics and / or functions and solving the same or different problems. Similarly, it should be understood that the foregoing benefits and advantages may apply to one embodiment or may apply to several embodiments.

[0054] Since the features of this disclosure can be embodied in various forms without departing from the nature of this disclosure, it should also be understood that the above embodiments are not limited to any of the details described above, and unless otherwise stated, should be broadly interpreted as falling within the scope defined by the appended claims. Therefore, all modifications and alterations falling within the scope and limits of the claims or equivalents thereof should be covered by the appended claims.

Claims

1. A hoist characterized by, include: The frame, including the support panels; A reel includes a spindle and two turntables. The spindle is rotatably mounted on a frame. The two turntables are fixed to the spindle and spaced apart from each other. Each turntable has a cable groove along the circumferential direction, and each cable groove is used to wind a single cable. A speed reducer, mounted on the support plate, includes a transmission mechanism, and the drum is drively connected to the transmission mechanism; and A driver, mounted on the reducer, drives the drum to rotate via the transmission mechanism.

2. The hoist of claim 1, wherein, The reel also includes a spacer, which is sleeved outside the mandrel and fixedly connected between the two turntables; and / or the width of the cable groove along the axial direction of the mandrel is equal to or greater than the diameter of the cable by 0.1-1.5 mm.

3. The hoist of claim 1, wherein, The turntable includes a first disc and a second disc arranged opposite to each other, and a connecting disc connecting the first disc and the second disc. The connecting disc is located near the center of the first disc and the second disc. The annular space defined by the first disc, the connecting disc and the second disc is the cable groove. The length of the connecting disc along the spindle is the width of the cable groove.

4. The winch of claim 3, wherein The connecting plate has a hanging hole, and the end of the cable is fixed with a clamping member, which cooperates with the hanging hole.

5. The winch of claim 4, wherein, The mounting hole includes a first hole segment and a second hole segment connected to each other, the diameter of the first hole segment being smaller than that of the second hole segment; the second hole segment extends outward to the outer edge of the first disc and the second disc; the clamping member includes a sleeve fixed to the cable and a limiting ball connected to the end of the sleeve, the diameter of the limiting ball being larger than that of the sleeve.

6. The winch of any one of claims 1-5, wherein, The transmission mechanism is a two-stage worm gear transmission mechanism, including a rotatable first worm and a second worm, as well as a first worm wheel and a second worm wheel. The first worm is connected to the driver, the first worm wheel is fixedly installed on the second worm and cooperates with the first worm, and the second worm wheel is installed on the spindle and cooperates with the second worm.

7. The winch as described in claim 6, characterized in that, The reducer includes a housing fixed to the support plate or an integral structure with the support plate, and a side cover installed on one side of the housing. The transmission mechanism is installed in the space enclosed by the housing and the side cover.

8. The winch as described in any one of claims 1-5, characterized in that, It also includes a cable guiding mechanism, which comprises: Two boots, detachably mounted on the support plate, correspond to the two turntables respectively; and Two thread ends are respectively located below the two boots. The insert includes a hollow head located on the support plate and a cylindrical part located below the support plate. A first guide wheel is installed on the head, and a second guide wheel is installed inside the cylindrical part. The first guide wheel, the second guide wheel, and the turntable are located in the same plane, and the spindle of the turntable, the axle of the first guide wheel, and the axle of the second guide wheel are parallel to each other. The thread end has a through hole that runs vertically through the cable. The through hole includes an upper section and a lower section. A blocking ball is provided in the lower section, and the diameter of the blocking ball is larger than the diameter of the upper section. The blocking ball has a through hole, and another clamping member fixed to the other end of the cable is attached to the through hole of the blocking ball.

9. The winch as described in claim 8, characterized in that, It also includes a damper, which comprises a housing, a damping element, and an elastic element. The housing is mounted on the head of the boot, a portion of the damping element is disposed within the housing and is movable relative to the housing, and the elastic element is pre-compressed and disposed between the housing and the damping element. Under the elastic action of the elastic element, the damping element can abut the cable against the first guide wheel.

10. The winch as described in claim 1, characterized in that, It also includes a connecting pipe, the driver is a bidirectional pneumatic motor, and the connecting pipe is connected to the air passage inside the bidirectional pneumatic motor through a rotary joint.

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