winch

Abstract

This application relates to a winch, belonging to the field of winch technology. The winch includes a base, a support frame, and a drum. The support frame is mounted on the base, and the drum is sleeved on the support frame. A first gear is provided on the drum. A transmission component and a power unit are also included. The power unit is connected to the transmission component to drive the transmission component to rotate. The power unit includes a power output shaft, and the transmission component is sleeved on the power output shaft. The transmission component can move along the axial direction of the power output shaft. A second gear is provided on the transmission component. The transmission component has a first position and a second position. When the transmission component is in the first position, the second gear meshes with the first gear. When the transmission component is in the second position, the second gear is spaced apart from the first gear. According to the winch of the present invention, when the drum drive unit of the winch cannot output power, by moving the transmission component, the second gear meshes with the first gear. The power unit drives the second gear to rotate, thereby driving the first gear to rotate and causing the drum to rotate. The power transmission is reliable, the structure is compact, and the reliability is high.

Description

Technical Field

[0001] This application relates to the field of winch technology, and more particularly to a winch. Background Technology

[0002] The winch is one of the important components of a drilling and workover rig. It is mainly used for raising and lowering the derrick, raising and lowering drill strings and casing, controlling drilling pressure during drilling, handling accidents, and performing operations such as core extraction and oil testing. It mainly consists of four parts: the power unit, the gear reducer, the winch body, and the auxiliary drive unit.

[0003] During drilling and well workover operations, a malfunction in the power transmission components driving the winch renders it inoperable, preventing power from being input to the winch and paralyzing the hoisting system, severely impacting operational efficiency. In existing winch emergency devices, under normal circumstances, the power source transfers power from the angle box to the chain box and then to the winch. When the power source fails, the winch motor's power is input to the angle box to maintain winch hoisting and lowering. The drawback is that power transfer must pass through the angle box and chain box to complete the operation. If either the angle box or the chain box malfunctions, the winch receives no power and ceases operation, causing the hook to suspend, resulting in a serious accident. A winch emergency solution proposed in patent CN268134Y has not been widely adopted due to the complex internal transmission structure of the winch, its susceptibility to malfunctions, and the large space occupied by its components.

[0004] Therefore, there is an urgent need for a winch emergency power device that is simple in structure and easy to promote. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a winch that has reliable power transmission, compact structure, simple operation, and high reliability.

[0006] The winch according to the present invention includes: a base, a support frame, and a drum. The support frame is disposed on the base, and the drum is sleeved on the support frame. A first gear is provided on the drum. A transmission member and a power unit are connected to the transmission member to drive the transmission member to rotate. The power unit includes a power output shaft. The transmission member is sleeved on the power output shaft and can move along the axial direction of the power output shaft. A second gear is provided on the transmission member. The transmission member has a first position and a second position. When the transmission member is in the first position, the second gear meshes with the first gear. When the transmission member is in the second position, the second gear is spaced apart from the first gear.

[0007] According to the winch of the present invention, by providing a movable transmission component, when the drum drive unit of the winch is operating normally, the transmission component is in a second position, with the second gear spaced apart from the first gear. The drum drive unit drives the drum to rotate while simultaneously driving the first gear to rotate, preventing the second gear from interfering with the first gear. When the drum drive unit of the winch cannot output power, the transmission component is moved from the second position to the first position, thereby causing the second gear to mesh with the first gear. The power unit drives the second gear to rotate, thereby driving the first gear to rotate and in turn driving the drum to rotate, thus realizing the winding and unwinding of the rope by the drum. The power transmission is reliable, the structure is compact, the operation is simple, and the structure is simple with high reliability.

[0008] The winch according to the present invention includes: an adjusting rod rotatably mounted on a base, a connecting portion fixedly provided on the adjusting rod, a first through hole provided on the connecting portion, the first through hole being configured as an oblong hole and extending along a second direction; and a locking member rotatably connected to a transmission member, a first limiting pin fixedly provided on the locking member, the first limiting pin passing through the first through hole, wherein a power output shaft extends along a first direction, and the second direction is perpendicular to the first direction.

[0009] Optionally, the extension direction of the first through hole is perpendicular to the axial direction of the second gear.

[0010] Optionally, the transmission component is provided with a first limiting part, which is arranged side by side and spaced apart from the second gear along the axial direction of the second gear. The engaging component is provided with a second limiting part, and the first limiting part and the second limiting part are rotatably connected.

[0011] Optionally, the winch further includes: a limiting plate, which is fixed on the base, and has two second through holes, which are spaced apart along a second direction. The adjusting rod is provided with a detachable second limiting pin, which passes through either of the second through holes.

[0012] Optionally, the adjusting rod is provided with a mounting plate, which includes a long plate and a short plate connected to each other in an L-shape. The short plate is opposite to the adjusting rod and has an assembly hole. The second limiting pin passes through both the second through hole and the assembly hole. The second limiting pin includes a handle, which is located on the side of the limiting plate away from the second gear.

[0013] Optionally, the winch further includes: a limiting bracket, which is disposed on the base, and has a first clamp and a second clamp on the limiting bracket. The limiting bracket and the first clamp together define a first mounting hole, and the limiting bracket and the second clamp together define a second mounting hole. The adjusting rod passes through both the first mounting hole and the second mounting hole.

[0014] According to the winch of the present invention, a limiting baffle is provided at one end of the power output shaft, and the limiting baffle is located on the side of the transmission component away from the power unit.

[0015] According to the winch of the present invention, the transmission component is provided with a channel extending through it in the axial direction, the power output shaft passes through the channel, the inner wall of the channel and one of the power output shafts are provided with a guide groove, and the other is provided with a guide part, the guide part is embedded in the guide groove, and the guide groove extends in the axial direction of the power output shaft.

[0016] According to the winch of the present invention, the pitch circle diameter of the second gear is smaller than that of the first gear. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A perspective view of a winch according to an embodiment of the present invention;

[0020] Figure 2 This is a front view of the drive component of a winch in a second position according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a front view of the drive component of a winch in a first position according to an embodiment of the present invention;

[0023] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0024] Figure 6 A perspective view of the transmission component of a winch in a second position according to an embodiment of the present invention;

[0025] Figure 7 A perspective view of the transmission component of a winch in a first position according to an embodiment of the present invention;

[0026] Figure 8 An exploded view of a portion of the structure of a winch according to an embodiment of the present invention;

[0027] Figure 9 Another perspective view of the winch according to an embodiment of the present invention;

[0028] Figure 10 An exploded view of a portion of the structure of a winch according to an embodiment of the present invention;

[0029] Figure 11 This is an assembly diagram of a portion of the structure of a winch according to an embodiment of the present invention.

[0030] Figure label:

[0031] Winch 1,

[0032] Base 10, support frame 20, drum 30, first gear 31, transmission component 40, second gear 41, first limiting part 42, channel 43, guide groove 432, power part 50, power output shaft 51, limiting baffle 52, adjusting rod 60, connecting part 61, first through hole 612, second limiting pin 62, handle 622, mounting plate 63, limiting groove 64, engaging part 70, first limiting pin 71, second limiting part 72, limiting plate 80, second through hole 81, limiting bracket 90, first clamp 91, second clamp 92. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figure 1 and Figure 8 As shown, the winch 1 according to an embodiment of the present invention includes: a base 10, a support frame 20, a drum 30, a transmission component 40, and a power unit 50.

[0035] Specifically, such as Figures 2-5 As shown, the support frame 20 is mounted on the base 10, and the drum 30 is sleeved on the support frame 20. A first gear 31 is provided on the drum 30. The power unit 50 is connected to the transmission member 40 to drive the transmission member 40 to rotate. The power unit 50 includes a power output shaft 51, and the transmission member 40 is sleeved on the power output shaft 51. The transmission member 40 can move along the axial direction of the power output shaft 51. A second gear 41 is provided on the transmission member 40. The transmission member 40 has a first position and a second position, such as... Figure 4 and Figure 5 As shown, when the transmission component 40 is in the first position, the second gear 41 meshes with the first gear 31, as follows: Figure 2 and Figure 3 As shown, when the transmission member 40 is in the second position, the second gear 41 is spaced apart from the first gear 31.

[0036] More specifically, the first gear 31 and the drum 30 are fixedly connected. That is, if the drum 30 is driven to rotate, the first gear 31 will rotate synchronously, and vice versa. The drum 30 and the first gear 31 can be integrally formed or detachably fixedly connected. The power output shaft 51 can be the direct output shaft of the power unit 50, or it can be the output shaft after being reduced by multiple reduction gears. For example, the power unit 50 is a motor, and the power output shaft 51 can be the output shaft of the motor, or it can be the output shaft required by the motor output shaft to transmit the motion to the transmission component 40 after being reduced by multiple reduction gears. Of course, the power unit 50 is not limited to a motor, but can also be a hydraulic motor or a pneumatic motor, etc.

[0037] The winch 1 typically has a drum 30 drive unit and a winch rope. One end of the winch rope is fixedly wound on the drum 30, and the other end of the winch rope is used to lift or lower items. The drum 30 drive unit is used to drive the drum 30 to rotate under normal conditions, thereby realizing the winding and unwinding of the winch rope, and thus realizing the lifting or lowering of items.

[0038] When the drive unit of drum 30 is operating normally, such as Figure 2 and Figure 3 As shown, the transmission component 40 is in the second position, with the second gear 41 spaced apart from the first gear 31. The second gear 41 avoids interference with the first gear 31. In the event of a malfunction in the drive unit of the winch 1's drum 30, the transmission component 40 can be manually moved from the second position to the first position, or mechanically driven to move from the second position to the first position. Figure 4 and Figure 5 As shown, when the transmission component 40 is in the first position, the second gear 41 meshes with the first gear 31, and drives the power output shaft 51 to rotate through the power unit 50, thereby driving the second gear 41 to rotate, which in turn drives the first gear 31 and the drum 30 to rotate, realizing the winding and unwinding of the rope, thereby lifting or lowering the item.

[0039] It should be noted that the "first position" and "second position" are defined positions only to illustrate the relative positional relationship between the first gear 31 and the second gear 41, and do not specifically refer to any particular position. As long as the corresponding relative positional relationship is satisfied, it is acceptable.

[0040] It should also be noted that the second gear 41 includes cylindrical gears, bevel gears, racks, worm gears, and worms.

[0041] According to an embodiment of the present invention, the winch 1 is equipped with a movable transmission member 40. When the drive unit of the drum 30 of the winch 1 is operating normally, the transmission member 40 is in a second position, with the second gear 41 spaced apart from the first gear 31. The drive unit of the drum 30 drives the drum 30 to rotate while simultaneously driving the first gear 31 to rotate, preventing the second gear 41 from interfering with the first gear 31. When the drive unit of the drum 30 of the winch 1 cannot output power, the transmission member 40 is moved from the second position to the first position, thereby causing the second gear 41 to mesh with the first gear 31. The power unit 50 drives the second gear 41 to rotate, thereby driving the first gear 31 to rotate and in turn driving the drum 30 to rotate, thus realizing the winding and unwinding of the rope by the drum 30. The power transmission is reliable, the structure is compact, the operation is simple, and the structure is simple and highly reliable.

[0042] like Figures 6-8 As shown, the winch 1 according to an embodiment of the present invention further includes an adjusting rod 60 and a locking member 70.

[0043] In detail, the adjusting rod 60 is rotatably mounted on the base 10, and a connecting part 61 is fixedly mounted on the adjusting rod 60. The connecting part 61 is provided with a first through hole 612, which is constructed as an oblong hole. The engaging member 70 is rotatably connected to the transmission member 40, and a first limiting pin 71 is fixedly mounted on the engaging member 70. The first limiting pin 71 passes through the first through hole 612.

[0044] For ease of explanation, the axial direction of the power output shaft 51 is defined as the first direction, and the direction perpendicular to the axial direction of the power output shaft 51 is defined as the second direction. Figure 2 The first and second directions are shown.

[0045] like Figure 9 and Figure 10As shown, the adjusting rod 60 is fixedly provided with a connecting part 61. When the adjusting rod 60 rotates, it can drive the connecting part 61 to rotate synchronously. The first through hole 612 will change position with the rotation of the connecting part, and the first limiting pin 71 passes through the first through hole 612. Therefore, the first limiting pin 71 will change position accordingly. The movement trajectory of the connecting part 61 is a rotation trajectory, which has a component in the first direction and a component in the second direction. This allows the first limiting pin 71 to obtain the components in the first direction and the second direction. The first through hole 612 is constructed as an oblong hole and extends along the second direction, thereby allowing the first limiting pin 71 to obtain the components in the first direction and the second direction. The pin 71 can move in the second direction within the first through hole 612, which causes the engaging member 70 and the transmission member 40 to rotate relative to each other. This is not the target movement required by the solution of this application. This is to prevent the first limiting pin 71 from jamming and interfering with the connecting part 61, thus hindering the rotation of the adjusting rod 60. The component of the first limiting pin 71 in the first direction can drive the engaging member 70 to move in the first direction, thereby driving the transmission member 40 to move in the first direction through the engaging member 70. By rotating the adjusting rod 60 in different directions, the transmission member 40 can be moved from the first position to the second position, or from the second position to the first position.

[0046] It should be noted that the rotation of the adjusting rod 60 can be driven mechanically, such as by adding a clutch, and can be pneumatic, hydraulic or electric, or manually.

[0047] In some embodiments, the extension direction of the first through hole 612 is perpendicular to the axial direction of the second gear 41. That is, the axial direction of the second gear 41 is in the same direction as the axial direction of the power output shaft 51, which simplifies the structural configuration.

[0048] In some embodiments, the transmission member 40 is provided with a first limiting part 42, the first limiting part 42 and the second gear 41 are arranged side by side and spaced apart along the axial direction of the second gear 41, the engaging member 70 is provided with a second limiting part 72, and the first limiting part 42 and the second limiting part 72 are rotatably connected.

[0049] like Figure 8 As shown, the first limiting part 42 is configured as a wheel groove, and the wheel groove and the second gear 41 are arranged side by side and spaced apart along the axial direction of the second gear 41. The engaging part 70 and the second limiting part 72 are together configured as a clamp, which is rotatably engaged in the wheel groove. In order to reduce the frictional resistance between the clamp and the transmission part 40 when the clamp rotates, lubricating oil, grease or the like can be injected into the wheel groove, or a bearing can be provided between the clamp and the wheel groove.

[0050] In some other embodiments, the first limiting part 42 is configured as a wheel groove, and the second limiting part 72 is configured as a protrusion. The protrusion extends along the circumferential direction of the engaging member 70 and is engaged in the wheel groove.

[0051] In some other embodiments, the first limiting portion 42 is configured as a protrusion and the second limiting portion 72 is configured as a groove, the protrusion extending along the circumferential direction of the transmission member 40 and the groove extending along the circumferential direction of the engaging member 70.

[0052] In some embodiments, the winch 1 further includes a limiting plate 80. The limiting plate 80 is fixed on the base 10 and has two second through holes 81. The two second through holes 81 are spaced apart along a second direction. The adjusting rod 60 is provided with a detachable second limiting pin 62, which passes through either of the second through holes 81.

[0053] like Figure 9 As shown, the second limiting pin 62 is spaced apart from the connecting part 61, and the second limiting pin 62 is located on the side of the connecting part 61 away from the transmission member 40. The limiting plate 80 is fixed on the base 10, and the second limiting pin 62 is fixedly connected to the adjusting rod 60. That is to say, the second limiting pin 62 and the adjusting rod 60 can be integrally formed or assembled. By removing the second limiting pin 62 from the adjusting rod 60, the adjusting rod 60 can be rotated to insert the second limiting pin 62 into the corresponding second through hole 81. The second limiting pin 62 and the adjusting rod 60 are assembled, thereby driving the transmission member 40 to move in the first direction. The length of the second through hole 81 is limited, so the rotation range of the adjusting rod 60 can be limited, thereby limiting the movable range of the transmission member 40 in the first direction. In other words, the first position and the second position can be defined. Here, the "length of the second through hole 81" refers to the length of the second through hole 81 in the second direction.

[0054] In addition, the cooperation between the second through hole 81 and the second limiting pin 62 can also limit the displacement of the adjusting rod 60 along the third direction, preventing the adjusting rod 60 from moving along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0055] In some embodiments, the adjusting rod 60 is provided with a mounting plate 63, which includes a long plate and a short plate connected to each other in an L-shape. The short plate is opposite to the adjusting rod 60 and has an assembly hole. The second limiting pin 62 passes through both the second through hole 81 and the assembly hole. The second limiting pin 62 includes a handle 622, which is located on the side of the limiting plate 80 away from the second gear 41.

[0056] During assembly, first align the mounting plate 63 with the limiting plate 80, ensuring the mounting hole and the second through hole 81 are aligned. Then, insert the second limiting pin 62 from the side of the limiting plate 80 away from the second gear 41 into the second through hole 81 and the mounting hole. Next, use fasteners to limit the second limiting pin 62 from the side closer to the second gear 41, preventing it from dislodging from the second through hole 81. A handle 622 is provided for easy manual operation of the adjusting rod 60, providing a comfortable grip.

[0057] In some embodiments, the winch 1 further includes a limiting bracket 90, which is disposed on the base 10. The limiting bracket 90 is provided with a first clamp 91 and a second clamp 92 opposite to each other. The limiting bracket 90 and the first clamp 91 together define a first mounting hole, and the limiting bracket 90 and the second clamp 92 together define a second mounting hole. The adjusting rod 60 passes through both the first mounting hole and the second mounting hole.

[0058] like Figure 11 As shown, the limiting bracket 90 defines a portion of the first mounting hole, the first clamp 91 defines another portion of the first mounting hole, the limiting bracket 90 defines a portion of the second mounting hole, and the second clamp 92 defines another portion of the second mounting hole. The limiting bracket 90 is constructed in a strip shape and is located below the power output shaft 51, which makes the structure of the winch 1 more compact.

[0059] Thus, when installing the adjusting rod 60, simply place the adjusting rod 60 in the corresponding position of the limiting bracket 90. The first mounting hole and the second mounting hole of the limiting bracket 90 will limit the adjusting rod 60, thus preventing mistaken installation. Then, connect the first clamp 91 to the corresponding position of the limiting bracket 90 and the second clamp 92 to the corresponding position of the limiting bracket 90 to complete the installation of the adjusting rod 60. The structure is simple, the installation process is simplified, and the cost is reduced.

[0060] In some embodiments, as shown in the figure, the adjusting rod 60 is provided with two limiting grooves 64, and the first clamp 91 and the second clamp 92 are respectively engaged in the corresponding limiting grooves 64, thereby limiting the adjusting rod 60 and preventing the adjusting rod 60 from moving in a third direction.

[0061] According to an embodiment of the winch 1 of the present invention, a limiting baffle 52 is provided at one end of the power output shaft 51. The limiting baffle 52 is located on the side of the transmission member 40 away from the power unit 50, thereby preventing the transmission member 40 from detaching from the power output shaft 51 and limiting the transmission member 40. During assembly, the transmission member 40 is first sleeved on the power output shaft 51, and then the limiting baffle 52 is installed in place on the side of the power output shaft 51 away from the power unit 50.

[0062] According to an embodiment of the present invention, the winch 1 has a transmission member 40 with a channel 43 extending through it in the axial direction. The power output shaft 51 passes through the channel 43. The inner wall of the channel 43 and one of the power output shaft 51 are provided with a guide groove 432, and the other is provided with a guide part. The guide part is embedded in the guide groove 432, and the guide groove 432 extends in the axial direction of the power output shaft 51.

[0063] That is, in some embodiments, the inner wall of the channel 43 is provided with a guide groove 432, the guide groove 432 extends along the first direction, the power output shaft 51 is provided with a guide part, the guide part extends along the first direction, and the guide part is embedded in the guide groove 432; in some embodiments, the inner wall of the channel 43 is provided with a protruding guide part, the power output shaft 51 is provided with a guide groove 432, and both the guide part and the guide groove 432 extend along the first direction.

[0064] This configuration allows the transmission component 40 to move only along the axial direction of the power output shaft 51, without rotating relative to the power output shaft 51.

[0065] According to the winch 1 of the present invention, the pitch circle diameter of the second gear 41 is smaller than that of the first gear 31, so as to achieve the deceleration effect on the drum 30 and increase the torque, so that the power unit 50 can drive the drum 30 to rotate with a smaller torque.

[0066] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A winch, characterized in that, include: A base, a support frame, and a drum, wherein the support frame is mounted on the base, the drum is sleeved on the support frame, and a first gear is provided on the drum; The transmission component and the power unit are connected to the transmission component to drive the transmission component to rotate. The power unit includes a power output shaft, and the transmission component is sleeved on the power output shaft. The transmission component is movable along the axial direction of the power output shaft. The transmission component is provided with a second gear. The transmission component has a first position and a second position. When the transmission component is in the first position, the second gear meshes with the first gear. When the transmission component is in the second position, the second gear is spaced apart from the first gear. An adjusting rod is rotatably mounted on the base. A connecting part is fixedly provided on the adjusting rod. A first through hole is provided on the connecting part. The first through hole is constructed as an oblong hole and extends along a second direction. A locking component is rotatably connected to the transmission component. A first limiting pin is fixedly mounted on the locking component and passes through a first through hole, allowing the first limiting pin to move within the first through hole in the second direction. The adjusting rod rotates to switch the position state of the transmission component, and the power output shaft extends along a first direction, with the second direction perpendicular to the first direction; The transmission component is provided with a first limiting part, which is configured as a wheel groove. The wheel groove and the second gear are arranged side by side and spaced apart along the axial direction of the second gear. The engaging component is provided with a second limiting part, and the engaging component and the second limiting part are configured to form a clamp. The clamp is rotatably engaged in the wheel groove. The clamp is configured as a detachable structure and fully encloses the wheel groove in the circumferential direction.

2. The winch according to claim 1, characterized in that, The extension direction of the first through hole is perpendicular to the axial direction of the second gear.

3. The winch according to claim 1, characterized in that, Also includes: A limiting plate is fixed on the base. The limiting plate has two second through holes, which are spaced apart along the second direction. The adjusting rod has a detachable second limiting pin, which passes through either of the second through holes.

4. The winch according to claim 3, characterized in that, The adjusting rod is provided with a mounting plate, which includes a long plate and a short plate connected to each other in an L-shape. The short plate is opposite to the adjusting rod and has an assembly hole. The second limiting pin passes through both the second through hole and the assembly hole. The second limiting pin includes a handle, which is located on the side of the limiting plate away from the second gear.

5. The winch according to claim 1, characterized in that, Also includes: A limiting bracket is provided on the base. The limiting bracket is provided with a first clamp and a second clamp that are opposite each other. The limiting bracket and the first clamp together define a first mounting hole, and the limiting bracket and the second clamp together define a second mounting hole. The adjusting rod passes through both the first mounting hole and the second mounting hole.

6. The winch according to claim 1, characterized in that, One end of the power output shaft is provided with a limiting baffle, which is located on the side of the transmission component away from the power unit.

7. The winch according to claim 1, characterized in that, The transmission component has a channel extending through it along its axial direction, and the power output shaft passes through the channel. The inner wall of the channel and one of the power output shafts are provided with guide grooves, and the other is provided with guide portions. The guide portions are embedded in the guide grooves, and the guide grooves extend along the axial direction of the power output shafts.

8. The winch according to claim 1, characterized in that, The pitch circle diameter of the second gear is smaller than that of the first gear.

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