Engineering winch

Abstract

The invention discloses an engineering winch, which belongs to the technical field of hydrological engineering and comprises a support frame, a motor is mounted on the outer side of the support frame, and an output shaft of the motor is in meshing transmission with a shaft of a winding roller through a transmission gear; the lifting mechanism is arranged between the steel wire rope and the supporting seat, the lifting mechanism is used for adjusting the height of the supporting seat, a fixing rod is fixed to the lower corner of the supporting seat, and a pulley is installed on the lower end face of the supporting box; and the anti-abrasion assembly is arranged on the inner side of the supporting base and used for reducing abrasion when the steel wire rope is wound and unwound, and a cleaning mechanism is arranged on the inner side of the anti-abrasion assembly. The engineering winch is provided with a structure for guiding the steel wire rope to be wound and unwound, in the guiding process, on one hand, the effect of reducing abrasion of the steel wire rope is achieved, on the other hand, the steel wire rope is cleaned through power generated by winding and unwinding, meanwhile, it can be guaranteed that the steel wire rope is always attached to the guiding structure in the winding and unwinding process, and the using stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrological engineering, and particularly to an engineering winch. Background Art

[0002] In hydrological engineering, hydrological monitoring is an important means, so a hydrological winch is required. The hydrological winch is generally installed on a ship. By means of winding and unwinding a steel wire rope, the hydrological monitor is driven into the water for monitoring. After the monitoring is completed, the monitor is hoisted by winding the steel wire rope. For example, an electric hydrological winch with the publication number of CN105752867A. The main features of this hydrological winch are modular assembly, light weight, flexibility, and convenient mobile installation. Its structure mainly includes a base, a driving mechanism, and a cantilever mechanism. A counter is arranged on the base. The cantilever mechanism is connected to the base through a hinge and a support rod. The cantilever forms an operating track for the steel wire rope through pulleys at both ends. The first end of the steel wire rope is connected to the driving mechanism, and the second end of the steel wire rope is connected to a lead fish. The lead fish is vertically wound and unwound under the drive of the driving mechanism. A code disk is arranged on the pulley at the first end of the cantilever. The code disk is coupled with the counter, and the generated induction signal is sent to the counter for water depth counting. A pulley is arranged at the second end of the cantilever, and a stopper is arranged below the pulley. The steel wire rope is led out from the stopper under the action of the lead fish, effectively avoiding unnecessary wear of the steel wire rope and ensuring the normal operation of the equipment. For example, an electric hydrological winch with the publication number of CN222454383U, which relates to the technical field of hydrological winches, includes: a bearing vehicle plate; symmetric rectangular grooves are formed in the middle of the bearing vehicle plate; two fixing grooves are formed at the right end of the bearing vehicle plate. Due to the different geographical positions and heights of water sources, first use a turntable to adjust the height of the fixing strip up and down, thereby also adjusting the height of the sampling cylinder. The position of the sampling cylinder is adjusted in advance so that the lower end of the sampling cylinder is in contact with the water surface, which is convenient for the sampling cylinder to be inserted into the water in time to collect water samples, solving the problem that water samples in the water source need to be collected to accurately judge how to use the water source at that place. Since the geographical positions and heights of the water sources for collecting water samples are different, the height of the sampling cylinder needs to be adjusted in advance. Otherwise, if the geographical position of the water source is too high and the position of the sampling cylinder is too low, it is inconvenient to insert the sampling cylinder into the water source to collect water samples. However, the above hydrological winches still have the following disadvantages in actual use: 1. Since the steel wire rope will contact the structure on the winch or the ship during the winding and unwinding process, the contact will generate friction, which will cause wear to the steel wire rope itself and other structures, thereby affecting the service life of the steel wire rope. Traditional winches lack a structure for reducing the wear of the steel wire rope. 2. Some winches are provided with a structure for guiding the winding and unwinding of the steel wire rope. Since the position and height of the steel wire rope will change during winding and extension, it is impossible to ensure that it always fits with the guiding structure, thereby affecting its stable winding and unwinding.

[0003] In view of the above problems, it is urgent to carry out innovative design on the basis of the original engineering winch. Summary of the Invention

[0004] The purpose of the present invention is to provide an engineering winch to solve the problem in the above-mentioned background technology that the traditional winch lacks a structure for reducing the wear of the steel wire rope, and cannot ensure that the steel wire rope is always in contact with the guiding structure, thereby affecting its stable winding and unwinding.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An engineering winch includes a support frame, a motor is installed on the outer side of the support frame, and the output shaft of the motor is meshed and driven with the shaft of the winding roller through a transmission gear, and a steel wire rope is wound around the outer side of the winding roller; It further includes: a lifting mechanism, which is arranged between the steel wire rope and the support seat, the lifting mechanism is used to adjust the height of the support seat, and the support seat is installed on the side of the support frame, a fixing rod is fixed at the lower corner of the support seat, and a support box is arranged at the bottom of the fixing rod, a pulley is installed on the lower end surface of the support box, and the pulley and the track form a sliding structure, and the track is arranged at the edge of the support frame; An anti-wear component, which is arranged inside the support seat, the anti-wear component is used to reduce the wear during the winding and unwinding of the steel wire rope, and a cleaning mechanism is arranged inside the anti-wear component, and the cleaning mechanism is used for cleaning the surface of the steel wire rope.

[0006] Preferably, the lifting mechanism includes a limiting plate arranged above the winding roller, and the limiting plate is of an arc structure. The lower surface of the limiting plate is in contact with the surface of the wound steel wire rope, and the end of the limiting plate and the slide rail form a sliding structure. At the same time, the slide rail is arranged inside the support frame. When the winding thickness of the steel wire rope above the winding roller gradually increases, it can drive the limiting plate to rise and slide on the slide rail.

[0007] Preferably, guiding rods are symmetrically arranged on the side surface of the limiting plate, and the end of the guiding rod away from the limiting plate penetrates through the fixing block, and the middle position of the guiding rod is slidably connected to the fixing block. At the same time, the fixing block is fixed to the lower end surface of the support seat. After the limiting plate rises, it drives the guiding rod to rise synchronously, and drives the support seat to rise synchronously through the fixing block.

[0008] Preferably, the fixing rod and the support box form a sliding structure, and a spring for resetting is wound around the outer side of the fixing rod, and the spring on the outer side of the fixing rod is in a compressed state. When the support seat is lifted, it can drive the fixing rod to slide on the support box, and the elasticity of the spring makes the lifting smoother.

[0009] Preferably, the anti-wear assembly includes guide wheels arranged inside the support base, and the guide wheels are evenly distributed. The diameters of the guide wheels increase sequentially from the middle to both sides. One end of each guide wheel is fixedly penetrated by a movable rod, and the movable rod is rotatably connected to the sleeve block. During the winding and unwinding process of the steel wire rope, it can contact the guide wheels, and the guide wheels can reduce the wear of the steel wire rope through rotation.

[0010] Preferably, the other end of the guide wheel is penetrated by a fixing column, and the fixing column is rotatably connected to the guide wheel. A support rod is slidably penetrated inside the fixing column, and the support rod is fixed to the support base. A spring for resetting is arranged below the fixing column. The guide wheel can rotate on the fixing column, and the fixing column can slide on the support rod.

[0011] Preferably, the cleaning mechanism includes air outlet holes opened on the guide wheels, and the air outlet holes are evenly distributed at equal angles. The air outlet holes are in a conical structure. An inner side of the guide wheel is fitted with a fixing plate, and the fixing plate is rotatably connected to the guide wheel. The fixing plate is fixedly connected to the fixing column. The width of the notch on the fixing plate is equal to the maximum inner diameter of the air outlet holes. The gas entering the guide wheel can pass through the notch on the fixing plate and be discharged from the air outlet holes.

[0012] Preferably, fixing holes are reserved on the side surface of the movable rod, and a sleeve block is sleeved outside the fixing holes. The sleeve block is communicated with the inner cavity of the guide wheel through the fixing holes and the cavity inside the movable rod. The movable rod is rotatably connected to the sleeve block. When the guide wheel rotates, it drives the movable rod to rotate in the sleeve block, and the gas in the movable rod can also be transmitted to the sleeve block through the fixing holes.

[0013] Preferably, a connecting pipe is fixed to the bottom of the sleeve block, and the bottom of the connecting pipe is connected to a piston plate. A fixing cavity is opened inside the support base outside the piston plate. An air inlet hole is reserved at the bottom of the piston plate. The fixing cavity is communicated with the sleeve block through the air inlet hole. One-way valves are arranged at both the air inlet hole and the bottom of the support base. When the piston plate descends, it can squeeze the gas in the fixing cavity and transmit it to the connecting pipe through the air inlet hole. When the piston plate rises, it can draw the outside gas into the fixing cavity.

[0014] Preferably, a cam is fixedly sleeved at one end of the movable rod away from the guide wheel, and the edge of the cam is in surface contact with the surface of the guide plate. The guide plate is in an arc structure. The guide plate is fixed to the side surface of the support base. A through groove is opened on the support base outside the movable rod, and the movable rod and the support base form a sliding structure through the through groove. When the movable rod rotates, it drives the cam to rotate synchronously and realizes the downward sliding of the movable rod through contact with the guide plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The engineering winch is provided with a structure for guiding the winding and unwinding of the steel wire rope. During the guiding process, on the one hand, it plays a role in reducing the wear of the steel wire rope, and on the other hand, it cleans the steel wire rope through the power generated by the winding and unwinding. At the same time, it can also ensure that the steel wire rope is always in contact with the guiding structure during the winding and unwinding process, improving the stability during use. The specific content is as follows: 1. When the thickness of the wound steel wire rope gradually increases, it can push the limit plate to rise. The limit plate drives the guiding rod to rise synchronously and drives the support base to lift, so that the height of the guiding wheel is the same as that when the steel wire rope is wound and unwound. This can ensure that the steel wire rope is always in contact with the guiding wheel during the winding and unwinding process; 2. The steel wire rope can be in contact with the guiding wheel during the winding and unwinding process. When in contact, it can drive the guiding wheel to rotate inside the support base. By the rotation of the guiding wheel, the wear of the steel wire rope during winding and unwinding can be reduced, thereby extending its service life; 3. When the movable rod rotates, it drives the cam to rotate synchronously, and drives the movable rod to slide down in the through groove through the guidance of the guiding plate. Then, it drives the piston plate to slide down in the fixed cavity through the connecting pipe, squeezes the gas in the fixed cavity into the connecting pipe through the air inlet hole, and then the gas enters the sleeve block, is transmitted to the movable rod through the fixed hole, and then enters the guiding wheel and is discharged from the air outlet hole to blow on the surface of the steel wire rope to clean the moisture and impurities on its surface; Furthermore, through the setting of the fixing plate to block the air outlet hole, it can ensure that the gas only discharges from the upper air outlet hole, and the air outlet holes in other positions are blocked. Coupled with the conical structure of the air outlet hole, the wind force during gas discharge can be increased, improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the limit plate of the present invention; Figure 3 is a schematic diagram of the connection structure of the guiding rod and the fixing block of the present invention; Figure 4 is a schematic cross-sectional view of the support box of the present invention; Figure 5 is a schematic cross-sectional view of the support base of the present invention; Figure 6 is of the present invention Figure 5 the enlarged structure schematic diagram at A in; Figure 7 is a schematic front cross-sectional view of the guiding wheel of the present invention; Figure 8 is a schematic side cross-sectional view of the guiding wheel of the present invention.

[0017] In the figure: 1, support frame; 2, motor; 3, transmission gear; 4, winding roller; 5, steel wire rope; 6, limit plate; 7, slide rail; 8, guide rod; 9, fixed block; 10, support seat; 11, fixed rod; 12, support box; 13, pulley; 14, track; 15, guide wheel; 16, air outlet; 17, fixing plate; 18, fixed column; 19, support rod; 20, movable rod; 21, fixing hole; 22, sleeve block; 23, connecting pipe; 24, piston plate; 25, air inlet; 26, fixed cavity; 27, cam; 28, guide plate; 29, through slot. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-8 , the present invention provides the following technical solutions: Embodiment 1: To solve the problems existing in the prior art, therefore, in this embodiment, through the following technical solutions, an engineering winch includes a support frame 1, a motor 2 is installed outside the support frame 1, and the output shaft of the motor 2 is meshed and driven with the shaft of a winding roller 4 through a transmission gear 3, and a steel wire rope 5 is wound around the outside of the winding roller 4; it further includes: a lifting mechanism, arranged between the steel wire rope 5 and the support seat 10, the lifting mechanism is used to adjust the height of the support seat 10, and the support seat 10 is installed on the side of the support frame 1, a fixed rod 11 is fixed at the lower corner of the support seat 10, and the bottom of the fixed rod 11 is provided with a support box 12, a pulley 13 is installed on the lower end surface of the support box 12, and the pulley 13 and the track 14 form a sliding structure, and the track 14 is arranged at the edge of the support frame 1; an anti-wear component, arranged inside the support seat 10, the anti-wear component is used to reduce the wear when the steel wire rope 5 is retracted and released, and a cleaning mechanism is arranged inside the anti-wear component, and the cleaning mechanism is used for cleaning the surface of the steel wire rope 5.

[0020] Some winches are provided with structures for guiding the retraction and release of the steel wire rope 5. Since the position and height of the steel wire rope 5 will change during winding and extension, it is impossible to ensure that it always fits with the guiding structure, thereby affecting its stable retraction and release. For example Figures 1-4As shown in the figure, the lifting mechanism includes a limiting plate 6 arranged above the winding roller 4. The limiting plate 6 is of an arc structure. The lower surface of the limiting plate 6 is in close contact with the surface of the wound steel wire rope 5. The end of the limiting plate 6 and the slide rail 7 form a sliding structure. At the same time, the slide rail 7 is arranged inside the support frame 1. Guide rods 8 are symmetrically arranged on the side surface of the limiting plate 6. One end of the guide rod 8 away from the limiting plate 6 penetrates through the fixing block 9. The middle position of the guide rod 8 and the fixing block 9 are in sliding connection. At the same time, the fixing block 9 is fixed to the lower end surface of the support seat 10. The fixing rod 11 and the support box 12 form a sliding structure. A spring for resetting is wound around the outside of the fixing rod 11. The spring outside the fixing rod 11 is in a compressed state. When the motor 2 operates, it can drive the winding roller 4 to rotate through the drive of the transmission gear 3, realizing the winding or extension of the steel wire rope 5. When the thickness of the wound steel wire rope 5 gradually increases, its surface can contact the limiting plate 6 and push it to rise. When the limiting plate 6 rises, it slides on the slide rail 7, and the limiting plate 6 drives the guide rod 8 to rise synchronously. The guide rod 8 can drive the support seat 10 to lift. When the support seat 10 rises, it drives the fixing rod 11 to slide on the support box 12. Since the spring outside the fixing rod 11 is in a compressed state, it is more labor-saving when lifting, making the height of the guide wheel 15 consistent with the height of the steel wire rope 5 during winding and unwinding. In this way, it can ensure that the steel wire rope 5 is always in contact with the guide wheel 15 during the winding and unwinding process. When the winding thickness of the steel wire rope 5 gradually decreases, the limiting plate 6 drops due to its own gravity, and similarly drives the support seat 10 to drop. Through the gravity of the support seat 10, it can also drop more smoothly when not lifted. And when winding and unwinding the steel wire rope 5, according to its winding position, it can drive the support box 12 to slide on the track 14 through the pulley 13, improving the accuracy of the winding and unwinding position.

[0021] Embodiment 2: Since the steel wire rope 5 will contact the structure on the winch or the ship during the winding and unwinding process, the contact will generate friction, which will cause wear to the steel wire rope 5 itself and other structures, thereby affecting the service life of the steel wire rope 5. The traditional winch lacks a structure to reduce the wear of the steel wire rope 5. Therefore, this embodiment adopts the following technical solutions, such as Figure 5As shown in the figure, the anti-wear component includes guide wheels 15 arranged inside the support base 10, and the guide wheels 15 are evenly distributed. The diameter of the guide wheels 15 increases sequentially from the middle to both sides. One end of the guide wheel 15 is fixedly penetrated by a movable rod 20, and at the same time, the movable rod 20 is rotatably connected to the sleeve block 22; the other end of the guide wheel 15 is penetrated by a fixed column 18, and the fixed column 18 is rotatably connected to the guide wheel 15. A support rod 19 is slidably penetrated inside the fixed column 18, and the support rod 19 is fixed to the support base 10. At the same time, a spring for resetting is arranged below the fixed column 18; the steel wire rope 5 can contact the guide wheel 15 during both the winding and unwinding processes. When contacting, it can drive one end of the guide wheel 15 to rotate on the fixed column 18, and the other end rotates on the sleeve block 22 through the movable rod 20. By the rotation of the guide wheel 15, the wear of the steel wire rope 5 can be reduced, thereby extending its service life.

[0022] Embodiment 3: Since the steel wire rope 5 on the winch will contact water during both the winding and unwinding processes, it will adhere to moisture and other impurities. When the traditional winch winds the steel wire rope 5, it is not convenient to clean it. Therefore, this embodiment adopts the following technical solutions, such as Figures 5-8As shown in the figure, the cleaning mechanism includes air outlet holes 16 formed in the guide wheel 15, and the air outlet holes 16 are evenly distributed at equal angles. The air outlet holes 16 are of a conical structure. At the same time, a fixing plate 17 is fitted inside the guide wheel 15, and the fixing plate 17 is rotatably connected to the guide wheel 15. The fixing plate 17 is fixedly connected to the fixing column 18. The width of the notch on the fixing plate 17 is equal to the maximum inner diameter of the air outlet hole 16; a fixing hole 21 is reserved on the side surface of the movable rod 20, and a sleeve block 22 is sleeved outside the fixing hole 21. The sleeve block 22 is communicated with the cavity inside the guide wheel 15 through the fixing hole 21 and the cavity inside the movable rod 20. At the same time, the movable rod 20 and the sleeve block 22 are rotatably connected; a connecting pipe 23 is fixed to the bottom of the sleeve block 22, and the bottom of the connecting pipe 23 is connected to a piston plate 24. A fixing cavity 26 is formed inside the support seat 10 on the outside of the piston plate 24. At the same time, an air inlet hole 25 is reserved at the bottom of the piston plate 24. The fixing cavity 26 is communicated with the sleeve block 22 through the air inlet hole 25. One-way valves are arranged at both the air inlet hole 25 and the bottom of the support seat 10; a cam 27 is fixedly sleeved at one end of the movable rod 20 away from the guide wheel 15. The edge of the cam 27 is in contact with the surface of the guide plate 28. The guide plate 28 is of an arc structure. At the same time, the guide plate 28 is fixed to the side surface of the support seat 10. A through groove 29 is formed in the support seat 10 on the outside of the movable rod 20. The movable rod 20 and the support seat 10 form a sliding structure through the through groove 29; when the movable rod 20 rotates, the cam 27 rotates synchronously. When the cam 27 rotates, it is always in contact with the guide plate 28. Driven by the guide of the guide plate 28, the movable rod 20 slides down in the through groove 29. When the movable rod 20 descends, the piston plate 24 is driven to slide down in the fixing cavity 26 through the connecting pipe 23. Then, the gas in the fixing cavity 26 is squeezed into the connecting pipe 23 through the air inlet hole 25. Then the gas enters the sleeve block 22, is transmitted to the movable rod 20 through the fixing hole 21, and then enters the guide wheel 15 and is discharged from the air outlet hole 16 to blow onto the surface of the steel wire rope 5 to clean the moisture and impurities on its surface. Through the arrangement of the fixing plate 17 to block the air outlet hole 16, it can ensure that the gas only discharges from the upper air outlet hole 16, and the air outlet holes 16 at other positions are blocked. Coupled with the conical structure of the air outlet hole 16, the wind force during air outlet can be improved, and the cleaning efficiency can be improved. When the cam 27 is not guided by the guide plate 28, the guide wheel 15 and the piston plate 24 are driven to rise by the resilience of the spring. At this time, no negative pressure is generated in the air inlet hole 25, and the outside gas can be pumped into the bottom of the support seat 10 for the next blowing.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An engineering winch, comprising a support frame (1), an electric motor (2) being mounted on the outer side of the support frame (1), the output shaft of the electric motor (2) being meshed and driven by a transmission gear (3) and a shaft of a winding roller (4), and a steel wire rope (5) being wound around the outer side of the winding roller (4); It is characterized in that Also includes: A lifting mechanism is arranged between the steel wire rope (5) and the support seat (10), the lifting mechanism is used to adjust the height of the support seat (10), and the support seat (10) is installed on the side of the support frame (1), a fixing rod (11) is fixed at the lower corner of the support seat (10), and a support box (12) is arranged at the bottom of the fixing rod (11), a pulley (13) is installed on the lower end surface of the support box (12), and the pulley (13) and the track (14) form a sliding structure, and the track (14) is arranged at the edge of the support frame (1); An anti-wear component is arranged on the inner side of the support seat (10), and is used to reduce the wear of the steel wire rope (5) when it is retracted or released. A cleaning mechanism is arranged on the inner side of the anti-wear component, and the cleaning mechanism is used to clean the surface of the steel wire rope (5).

2. An engineering winch according to claim 1, characterized in that: The lifting mechanism includes a limit plate (6) arranged above the winding roller (4), and the limit plate (6) is an arc-shaped structure. The lower surface of the limit plate (6) is in contact with the surface of the wound steel wire rope (5), and the end of the limit plate (6) and the slide rail (7) form a sliding structure, and the slide rail (7) is arranged on the inner side of the support frame (1).

3. An engineering winch according to claim 2, characterized in that: A guide rod (8) is symmetrically arranged on the side of the limit plate (6), and one end of the guide rod (8) away from the limit plate (6) passes through the fixed block (9), and the middle position of the guide rod (8) and the fixed block (9) are slidably connected, and the fixed block (9) is fixed to the lower end surface of the support seat (10).

4. The engineering winch according to claim 1, characterized in that: The fixing rod (11) and the supporting box (12) form a sliding structure, and a spring for returning the fixing rod (11) is wound around the outside of the fixing rod (11), and the spring on the outside of the fixing rod (11) is in a compressed state.

5. The engineering winch according to claim 1, characterized in that: The anti-wear component comprises guide wheels (15) arranged inside the support seat (10), and the guide wheels (15) are distributed at equal intervals, and the diameter of the guide wheels (15) increases from the middle to both sides in sequence, and a movable rod (20) is fixedly passed through one end of the guide wheel (15), and the movable rod (20) and the sleeve block (22) are rotatably connected.

6. The engineering winch according to claim 5, characterized in that: The other end of the guide wheel (15) is penetrated by a fixing column (18), and the fixing column (18) and the guide wheel (15) are rotatably connected. A support rod (19) is slidably penetrated inside the fixing column (18), and the support rod (19) is fixed on the support seat (10). A spring for returning the fixing block (18) is arranged below the fixing block (18).

7. The engineering winch according to claim 1, characterized in that: The cleaning mechanism comprises air outlet holes (16) formed on the guide wheel (15), the air outlet holes (16) being distributed at equal angles, and the air outlet holes (16) being of a conical structure, and a fixing plate (17) being fitted inside the guide wheel (15), the fixing plate (17) and the guide wheel (15) being rotatably connected, the fixing plate (17) and the fixing column (18) being fixedly connected, and the width of the notch on the fixing plate (17) being equal to the maximum inner diameter of the air outlet holes (16).

8. The engineering winch according to claim 5, characterized in that: A fixing hole (21) is reserved on the side of the movable rod (20), and a sleeve block (22) is sleeved on the outer side of the fixing hole (21). The sleeve block (22) is connected to the cavity inside the guide wheel (15) through the fixing hole (21) and the cavity inside the movable rod (20), and the movable rod (20) and the sleeve block (22) are rotatably connected.

9. The engineering winch according to claim 8, characterized in that: A connecting pipe (23) is fixed to the bottom of the sleeve block (22), and the bottom of the connecting pipe (23) is connected to a piston plate (24), and a fixing cavity (26) is provided in the support seat (10) outside the piston plate (24), and an air inlet hole (25) is reserved at the bottom of the piston plate (24), the fixing cavity (26) is connected to the sleeve block (22) through the air inlet hole (25), and a one-way valve is provided at the bottom of the air inlet hole (25) and the support seat (10).

10. The engineering winch according to claim 5, characterized in that: A cam (27) is fixedly sleeved on one end of the movable rod (20) away from the guide wheel (15), and the edge of the cam (27) is fitted and connected to the surface of a guide plate (28), and the guide plate (28) is an arc-shaped structure. The guide plate (28) is fixed to the side of the support seat (10), and a through groove (29) is provided on the support seat (10) outside the movable rod (20), and the movable rod (20) forms a sliding structure with the support seat (10) through the through groove (29).

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