Pay-off device

Abstract

The utility model provides a pay-off device. The pay-off device comprises a support and a pay-off device body, the rotating assembly is rotatably arranged on the support, and the rotating assembly comprises a rotating shaft; the pay-off barrel is arranged on the rotating shaft in a sleeving mode, the pay-off barrel is used for winding a connecting rope and is fixedly connected with the rotating shaft, a fixing structure is arranged between the support and the pay-off barrel, the fixing structure has a fixing state and an avoiding state which are oppositely arranged, and when the fixing structure is in the fixing state, the fixing structure can stop rotation of the pay-off barrel; when the fixing structure is in the avoiding state, the rotating assembly can drive the pay-off barrel to rotate. Through the technical scheme provided by the invention, the problems of high labor intensity and low accuracy of workers in the checking process in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire-releasing devices, and in particular to a wire-releasing device. Background Art

[0002] During the deepening process of the mine shaft, in order to ensure that the center line of the shaft is accurate and does not deviate, the center line of the shaft needs to be checked regularly.

[0003] In the prior art, the calibration tool is a pay-off roller, on which a connecting rope is wound, and a wire hammer is hung at the free end of the connecting rope. During the calibration process, the staff usually holds the pay-off roller to manually pay out and reel in the wire to complete the calibration of the center line. However, such a setting will increase the labor intensity of the staff, and the staff may shake during the calibration process, so the accuracy of the calibration cannot be guaranteed. Utility Model Content

[0004] The utility model provides a wire-laying device to solve the problems of high labor intensity and low accuracy of workers in the prior art during the checking process.

[0005] The utility model provides a line-releasing device, which comprises: a bracket; a rotating assembly rotatably arranged on the bracket, the rotating assembly comprising a rotating shaft; a line-releasing drum sleeved on the rotating shaft, the line-releasing drum is used for winding a connecting rope, the line-releasing drum is fixedly connected to the rotating shaft, and a fixed structure is provided between the bracket and the line-releasing drum, the fixed structure has a relatively arranged fixed state and an avoidance state, when the fixed structure is in the fixed state, the fixed structure can stop the line-releasing drum from rotating, and when the fixed structure is in the avoidance state, the rotating assembly can drive the line-releasing drum to rotate.

[0006] Furthermore, a connecting portion is provided on the wire reel, and a stopper is provided on the bracket, the stopper has a connecting end and a stopper end that are relatively arranged, the connecting end is connected to the bracket, the stopper end is detachably connected to the connecting portion, and the connecting portion and the stopper cooperate to form a fixed structure, when the stopper end is connected to the connecting portion, the fixed structure is in a fixed state, and when the stopper end is disconnected from the connecting portion, the fixed structure is in an avoidance state.

[0007] Furthermore, the connecting part includes a plurality of connecting holes, which are arranged at intervals along the circumference of the wire reel. The anti-rotation part includes an anti-rotation hook, which has a connecting end and a anti-rotation end. The anti-rotation end has a hook body, and the hook body can cooperate with the connecting hole to stop rotation.

[0008] Furthermore, the anti-rotation hook also includes a connecting piece, one end of the connecting piece is a connecting end, and the other end of the connecting piece is connected to the hook body, and at least a part of the connecting piece is composed of an elastic structure.

[0009] Furthermore, the pay-off drum includes a rotating drum and two baffles, the two baffles are respectively arranged at both ends of the rotating drum, the rotating drum is sleeved on the rotating shaft, the baffles are used to limit the wound connecting rope, and a fixed structure is provided between the baffles and the bracket.

[0010] Furthermore, the baffle is threadably connected to the rotating drum to adjust the distance between the two baffles, thereby adjusting the rope capacity of the pay-off drum.

[0011] Furthermore, the wire-releasing device also includes a lifting assembly, which is arranged on the bracket and can drive the bracket to move in a vertical direction.

[0012] Furthermore, the lifting assembly includes multiple lifting structures, which are arranged around the outer periphery of the bracket, and the lifting structures include: a sleeve, which is fixed on the bracket; a support rod, which is inserted into the sleeve, and the sleeve can move in a vertical direction relative to the support rod, and the support rod is provided with multiple plug-in holes, and the multiple plug-in holes are arranged at intervals along the axial direction; a pin shaft, which is inserted into the plug-in hole, and the pin shaft can abut against the sleeve to limit the sleeve axially.

[0013] Furthermore, a limiting protrusion is provided on the top of the support rod, and the limiting protrusion can abut against the sleeve to axially limit the support rod.

[0014] Furthermore, the rotating assembly also includes: two bearings, which are respectively fixed at both ends of the bracket, one end of the rotating shaft is connected to one of the bearings, and the other end of the rotating shaft is connected to the other bearing; a handle is connected to the rotating shaft to drive the rotating shaft to rotate.

[0015] By applying the technical solution of the utility model, the rotating shaft can be rotatably arranged on the bracket, the pay-off drum is sleeved and fixed on the rotating shaft, and the pay-off drum is used to wind the connecting rope. With such arrangement, the staff can release and reel in the wire by rotating the rotating shaft, avoiding the staff from bearing the weight of the pay-off drum and the connecting rope, reducing the staff's work intensity, improving the efficiency of releasing and reeling in the wire, and at the same time, avoiding the staff from shaking during the process of releasing and reeling in the wire, ensuring the accuracy of the verification. And there is a fixed structure between the bracket and the pay-off drum, so that when the line hammer moves to the desired position, the staff can switch the fixed structure to a fixed state, avoiding the staff from fixing the rotating shaft all the time, further reducing the staff's work intensity, and avoiding the rotating shaft from rotating at will, improving the reliability of the work of the pay-off device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The schematic diagram of the structure of the wire-releasing device provided by the utility model is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. Bracket;

[0020] 20. Rotating assembly;

[0021] 21. Rotating shaft; 22. Bearing; 23. Handle; 24. Fixing ring;

[0022] 30. Release the bobbin;

[0023] 31. Rotating drum;

[0024] 32. baffle plate; 321. connecting hole;

[0025] 41. Anti-rotation hook;

[0026] 411. hook body; 412. connecting piece;

[0027] 51. Lifting structure;

[0028] 511, sleeve;

[0029] 512, support rod; 5121, plug hole; 5122, limiting protrusion;

[0030] 513. Pin; 514. Hanging rope. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] like Figure 1As shown, an embodiment of the utility model provides a wire-releasing device, which includes a bracket 10, a rotating assembly 20 and a wire-releasing drum 30. The rotating assembly 20 is rotatably arranged on the bracket 10, and the rotating assembly 20 includes a rotating shaft 21. The wire-releasing drum 30 is sleeved on the rotating shaft 21, and the wire-releasing drum 30 is used to wind the connecting rope. The wire-releasing drum 30 is fixedly connected to the rotating shaft 21, and a fixed structure is provided between the bracket 10 and the wire-releasing drum 30. The fixed structure has a relatively set fixed state and an avoidance state. When the fixed structure is in the fixed state, the fixed structure can stop the wire-releasing drum 30 from rotating. When the fixed structure is in the avoidance state, the rotating assembly 20 can drive the wire-releasing drum 30 to rotate. In the present application, the line bob is hung at the free end of the connecting rope.

[0033] By applying the technical solution of the present application, the rotating shaft 21 is rotatably arranged on the bracket 10, and the pay-off drum 30 is sleeved and fixed on the rotating shaft 21, and the pay-off drum 30 is used to wind the connecting rope. With such arrangement, the staff can release and reel in the wire by rotating the rotating shaft 21, avoiding the staff from bearing the weight of the pay-off drum 30 and the connecting rope, reducing the staff's work intensity, and improving the efficiency of releasing and reeling in the wire. At the same time, it can avoid the staff from shaking during the process of releasing and reeling in the wire, and ensure the accuracy of the verification. In addition, there is a fixed structure between the bracket 10 and the pay-off drum 30, so that when the line hammer moves to the desired position, the staff can switch the fixed structure to a fixed state, avoiding the staff from fixing the rotating shaft 21 all the time, further reducing the staff's work intensity, and avoiding the rotating shaft 21 from rotating at will, and improving the reliability of the work of the pay-off device.

[0034] The rotating shaft 21 can be made of a round tube, and the rotating shaft 21 and the wire-paying drum 30 are coaxially arranged. Such an arrangement can ensure the stability of the rotating shaft 21 in driving the wire-paying drum 30 to rotate.

[0035] Furthermore, an avoidance hole is provided at the top of the bracket 10, and the rotating shaft 21 and the wire reel 30 are arranged at the top of the bracket 10, and the wire reel 30 is arranged corresponding to the avoidance hole, so that the wire reel 30 can avoid interference with the bracket 10 and ensure the normal rotation of the rotating shaft 21 and the wire reel 30.

[0036] Specifically, a connecting portion is provided on the wire reel 30, and a stopper is provided on the bracket 10. The stopper has a connecting end and a stopper end that are relatively arranged. The connecting end is connected to the bracket 10, and the stopper end is detachably connected to the connecting portion. The connecting portion and the stopper cooperate to form a fixed structure. When the stopper end is connected to the connecting portion, the fixed structure is in a fixed state. When the stopper end is disconnected from the connecting portion, the fixed structure is in an avoidance state. With such an arrangement, the structure is simple and easy to design. In addition, the stopper is arranged on the bracket 10 to prevent the stopper from being lost. The stopper is directly connected to the wire reel 30, the structure is simple, the addition of additional structures is avoided, and the operation is convenient.

[0037] Furthermore, the connection portion includes a plurality of connection holes 321, and the plurality of connection holes 321 are arranged at intervals along the circumference of the wire reel 30. The anti-rotation member includes an anti-rotation hook 41, and the anti-rotation hook 41 has a connection end and an anti-rotation end, and the anti-rotation end has a hook body 411, and the hook body 411 can cooperate with the connection hole 321 to stop rotation. Such a configuration has a simple structure and is easy to operate. When the wire reel 30 needs to be stopped from rotating, it is only necessary to hang the hook body 411 in the connection hole 321.

[0038] Specifically, the staff can design the number of the connection holes 321 according to the requirements.

[0039] Optionally, in other embodiments, the connecting portion includes a plurality of slots, the plurality of slots are arranged at intervals along the circumference of the pay-off drum 30, and the slots extend along the axial direction of the pay-off drum 30. The anti-rotation portion includes an anti-rotation rod, and the anti-rotation rod is slidably arranged on the bracket 10. In this arrangement, when the anti-rotation rod is located in the slot, the fixed structure is in a fixed state, and when the anti-rotation rod moves to the outside of the slot, the fixed structure is in an avoidance state.

[0040] The anti-rotation hook 41 further includes a connecting member 412, one end of which is a connecting end, and the other end of which is connected to the hook body 411, and at least part of the connecting member 412 is composed of an elastic structure. This arrangement makes it easier for the staff to hang the hook body 411 in the connecting hole 321.

[0041] Specifically, the elastic structure may be a spring.

[0042] Among them, a connecting ring is arranged on the bracket 10, and the connecting end of the connecting member 412 is sleeved on the connecting ring. Such arrangement makes it easy to change the position of the connecting member 412 and reduces the working difficulty of the staff.

[0043] Furthermore, in actual working process, since the wellbore has a high height, after the plumb bob moves to the desired position, when the stopper is connected to the connecting part, the plumb bob may have a slight displacement, but in actual working process, it will not affect the production work.

[0044] Specifically, the wire reel 30 includes a rotating drum 31 and two baffles 32, the two baffles 32 are respectively arranged at both ends of the rotating drum 31, the rotating drum 31 is sleeved on the rotating shaft 21, the baffles 32 are used to limit the wound connecting rope, and there is a fixed structure between the baffles 32 and the bracket 10. In this way, the wire reel 30 has a simple structure and is easy to assemble.

[0045] In the present application, a plurality of connection holes 321 are provided on the baffle plate 32 .

[0046] In addition, connecting holes 321 are provided on the two baffles 32, and two anti-rotation hooks 41 are provided on the bracket 10. The two anti-rotation hooks 41 are arranged in a one-to-one correspondence with the two baffles 32. Such a setting can ensure the stability of the wire reel 30 when the fixed structure is in a fixed state, and avoid the shaking of the wire reel 30.

[0047] The rotating drum 31 is a cylindrical structure and can be manufactured by processing a round tube that meets the requirements.

[0048] Furthermore, the baffle plates 32 may be made of a steel plate with a thickness of 4 mm, and the rotating drum 31 and the two baffle plates 32 are coaxially arranged.

[0049] Specifically, the baffle 32 is threadedly connected to the rotating drum 31 to adjust the distance between the two baffles 32, thereby adjusting the rope capacity of the pay-off drum 30. Such an arrangement can improve the versatility of the pay-off drum 30, and further improve the versatility of the pay-off device.

[0050] When the connecting rope is shorter, the distance between the two baffles 32 is shorter, and when the connecting rope is longer, the distance between the two baffles 32 is longer.

[0051] Furthermore, threaded sections may be provided only at the two ends of the rotating drum 31 , and such a configuration can reduce the difficulty of processing the rotating drum 31 .

[0052] Specifically, the wire-releasing device further comprises a lifting assembly, which is arranged on the bracket 10, and the lifting assembly can drive the bracket 10 to move in a vertical direction. Such an arrangement can improve the versatility of the wire-releasing device and facilitate placing the wire-releasing device in a suitable position.

[0053] Among them, the lifting assembly includes a plurality of lifting structures 51, and the plurality of lifting structures 51 are arranged around the outer periphery of the bracket 10. The lifting structure 51 includes a sleeve 511, a support rod 512 and a pin 513. The sleeve 511 is fixed on the bracket 10. The support rod 512 is inserted into the sleeve 511, and the sleeve 511 can move in the vertical direction relative to the support rod 512. The support rod 512 is provided with a plurality of plug holes 5121, and the plurality of plug holes 5121 are arranged at intervals along the axial direction. The pin 513 is inserted into the plug hole 5121, and the pin 513 can abut against the sleeve 511 to axially limit the sleeve 511. Such a configuration has a simple structure, is easy to operate, and requires low cost, thereby reducing the processing cost of the wire-releasing device.

[0054] Furthermore, in the present application, the plug-in hole 5121 is arranged through the support rod 512, and the pin 513 can be inserted into the plug-in hole 5121. Such an arrangement can ensure the stability of the pin 513 limiting the sleeve 511.

[0055] Specifically, the lifting structure 51 also includes a hanging rope 514, one end of which is connected to the sleeve 511, and the other end of the hanging rope 514 is connected to the pin 513. This arrangement can avoid the pin 513 from being lost and facilitate the pin 513 to be inserted into the plug hole 5121.

[0056] In the present application, the lifting assembly includes four lifting structures 51 , and the four lifting structures 51 are respectively arranged at four corners of the bracket 10 .

[0057] Furthermore, a limiting protrusion 5122 is provided on the top of the support rod 512, and the limiting protrusion 5122 can abut against the sleeve 511 to axially limit the support rod 512. Such a configuration can prevent the support rod 512 from falling out of the sleeve 511, improve the reliability of the support rod 512 during operation, and avoid the staff from repeatedly installing the support rod 512.

[0058] Specifically, the rotating assembly 20 further includes two bearings 22 and a handle 23. The two bearings 22 are respectively fixed at both ends of the bracket 10, one end of the rotating shaft 21 is connected to one of the bearings 22, and the other end of the rotating shaft 21 is connected to the other bearing 22. The handle 23 is connected to the rotating shaft 21 to drive the rotating shaft 21 to rotate. Such a configuration facilitates the rotating shaft 21 to rotate, and at the same time facilitates the staff to drive the rotating shaft 21 to rotate.

[0059] Furthermore, a protective cover may be provided on the handle 23 to increase the friction coefficient of the handle 23 and further facilitate operation by the staff.

[0060] Among them, in the present application, a fixing ring 24 is welded on the outer wall of the bearing 22, and the fixing ring 24 is welded on the bracket 10, so that the bearing 22 is fixed, the structure is simple, and the operation is convenient.

[0061] Among them, in the present application, a retaining ring is sleeved on the rotating shaft 21, and the retaining ring is arranged on the side of the bearing 22 close to the wire-paying drum 30. The retaining ring can axially limit the wire-paying drum 30 to prevent the bearing 22 from moving.

[0062] Therefore, by adopting the above structure, the rotating shaft 21 is rotatably arranged on the bracket 10, and the pay-off drum 30 is sleeved and fixed on the rotating shaft 21, and the pay-off drum 30 is used to wind the connecting rope. With such arrangement, the staff can release and reel in the wire by rotating the rotating shaft 21, avoiding the staff from bearing the weight of the pay-off drum 30 and the connecting rope, reducing the staff's work intensity, improving the efficiency of releasing and reeling in the wire, and at the same time, avoiding the staff from shaking during the process of releasing and reeling in the wire, ensuring the accuracy of the verification. In addition, there is a fixed structure between the bracket 10 and the pay-off drum 30, so that when the line hammer moves to the desired position, the staff can switch the fixed structure to a fixed state, avoiding the staff from fixing the rotating shaft 21 all the time, further reducing the staff's work intensity, and avoiding the rotating shaft 21 from rotating at will, improving the reliability of the work of the pay-off device.

[0063] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0064] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0065] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0067] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wire-releasing device, characterized in that: The pay-off device comprises: Bracket (10); A rotating assembly (20) is rotatably disposed on the bracket (10), and the rotating assembly (20) comprises a rotating shaft (21); A wire-paying drum (30) is sleeved on the rotating shaft (21). The wire-paying drum (30) is used to wind a connecting rope. The wire-paying drum (30) is fixedly connected to the rotating shaft (21). A fixed structure is provided between the bracket (10) and the wire-paying drum (30). The fixed structure has a relatively set fixed state and an avoidance state. When the fixed structure is in the fixed state, the fixed structure can stop the wire-paying drum (30) from rotating. When the fixed structure is in the avoidance state, the rotating assembly (20) can drive the wire-paying drum (30) to rotate.

2. The pay-off device according to claim 1, characterized in that: A connecting portion is provided on the wire reel (30), and a stopper is provided on the bracket (10), wherein the stopper has a connecting end and a stopper end which are arranged opposite to each other, wherein the connecting end is connected to the bracket (10), and the stopper end is detachably connected to the connecting portion, and the connecting portion cooperates with the stopper to form the fixed structure, and when the stopper end is connected to the connecting portion, the fixed structure is in the fixed state, and when the stopper end is disconnected from the connecting portion, the fixed structure is in the avoidance state.

3. The pay-off device according to claim 2, characterized in that: The connecting portion includes a plurality of connecting holes (321), and the plurality of connecting holes (321) are arranged at intervals along the circumference of the wire reel (30). The anti-rotation part includes an anti-rotation hook (41), and the anti-rotation hook (41) has the connecting end and the anti-rotation end. The anti-rotation end has a hook body (411), and the hook body (411) can cooperate with the connecting hole (321) to stop rotation.

4. The pay-off device according to claim 3, characterized in that: The anti-rotation hook (41) further comprises a connecting member (412), one end of the connecting member (412) being the connecting end, and the other end of the connecting member (412) being connected to the hook body (411), and at least a portion of the connecting member (412) being composed of an elastic structure.

5. The pay-off device according to claim 1, characterized in that: The pay-off drum (30) comprises a rotating drum (31) and two baffles (32), wherein the two baffles (32) are respectively arranged at two ends of the rotating drum (31), the rotating drum (31) is sleeved on the rotating shaft (21), the baffles (32) are used to limit the position of the wound connecting rope, and the fixing structure is provided between the baffles (32) and the bracket (10).

6. The pay-off device according to claim 5, characterized in that: The baffle (32) is threadedly connected to the rotating drum (31) to adjust the distance between the two baffles (32), thereby adjusting the rope capacity of the pay-off drum (30).

7. The pay-off device according to claim 1, characterized in that: The wire-releasing device further comprises a lifting assembly, wherein the lifting assembly is arranged on the bracket (10), and the lifting assembly can drive the bracket (10) to move in a vertical direction.

8. The pay-off device according to claim 7, characterized in that: The lifting assembly comprises a plurality of lifting structures (51), wherein the plurality of lifting structures (51) are arranged around the outer periphery of the bracket (10), and the lifting structures (51) comprise: A sleeve (511) fixed on the bracket (10); A support rod (512) is inserted into the sleeve (511), and the sleeve (511) can move in a vertical direction relative to the support rod (512). The support rod (512) is provided with a plurality of plug holes (5121), and the plurality of plug holes (5121) are arranged at intervals along the axial direction; The pin shaft (513) is inserted into the insertion hole (5121), and the pin shaft (513) can abut against the sleeve (511) to axially limit the sleeve (511).

9. The pay-off device according to claim 8, characterized in that: A limiting protrusion (5122) is provided on the top of the support rod (512), and the limiting protrusion (5122) can abut against the sleeve (511) to axially limit the support rod (512).

10. The wire-releasing device according to claim 1, characterized in that: The rotating assembly (20) further comprises: Two bearings (22), the two bearings (22) are respectively fixed at two ends of the bracket (10), one end of the rotating shaft (21) is connected to one of the bearings (22), and the other end of the rotating shaft (21) is connected to the other bearing (22); A handle (23) is connected to the rotating shaft (21) to drive the rotating shaft (21) to rotate.

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