Closed winch

Abstract

The embodiment of the invention relates to the technical field of winches, and provides a closed type winch which comprises a closed type winch box body and further comprises a power box, a power shaft, a power mechanism, a reciprocating type traction mechanism, a hollow traction box and a guide mechanism. The power shaft penetrates through and is rotatably arranged in the power box and the closed winch box body, a winding roller is arranged on the power shaft, a rope is wound on the winding roller, the power mechanism is arranged on one side of the power box and is connected with the power shaft, the reciprocating type traction mechanism is arranged in the power box and is connected with the power mechanism, and the reciprocating type traction mechanism is connected with the power mechanism. The hollow traction box is arranged on the reciprocating type traction mechanism, and a traction hole for a rope to penetrate through is formed in the hollow traction box. According to the technical scheme, the technical problem that in the operation process of a closed winch in the prior art, the winding precision is low is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of winch technology, and more specifically, to a closed winch. Background Technology

[0002] A winch, a type of mechanical device that uses a drum to wind cables (such as steel wire ropes) to lift heavy objects or perform horizontal traction, is widely used in many industrial fields such as construction, water conservancy, mining, and ports. Its core function is to drive the rollers to rotate, thereby winding and unwinding cables.

[0003] Traditional winches, especially simple closed winches, often struggle to neatly arrange cables during winding. Winches with conductor winding devices typically operate independently, making it difficult to precisely adjust the device's position based on the amount of cable wound on the rollers. This leads to overlapping, compression, and tangled winding of the cable during winding. This disordered or low-precision winding causes intense friction and compression between the cables, significantly accelerating wear and fatigue, shortening their lifespan, and even causing cable breakage. Furthermore, excessive cable accumulation on the rollers can cause the cable to jump off the drum or become stuck in equipment gaps, leading to malfunctions or downtime. Untidy winding also affects the smoothness of subsequent cable releases and poses potential operational risks. Summary of the Invention

[0004] To overcome the above-mentioned defects, the present invention provides a closed winch to solve the technical problem mentioned in the background art, that the closed winch in the prior art has low winding accuracy during operation.

[0005] According to one aspect, at least one embodiment of the present invention provides a closed winch, including a closed winch housing, and further including a power box, a power shaft, a power mechanism, a reciprocating traction mechanism, a hollow traction box, and a guide mechanism; The power box is located on one side of the enclosed winch box; The power shaft passes through and is rotatably mounted inside the power box and the enclosed winch box. A winding roller is mounted on the power shaft, and a rope is wound on the winding roller. The power mechanism is located on one side of the power box, and the power mechanism is connected to the power shaft; The reciprocating traction mechanism is housed within the power box and is connected to the power mechanism. The hollow traction box is mounted on the reciprocating traction mechanism, and a traction hole for the rope to pass through is provided inside the hollow traction box. The guiding mechanism is located inside the enclosed winch box. The guiding mechanism is located on the side of the reciprocating traction mechanism away from the winding roller. The guiding mechanism is provided with a guiding channel for the cable to pass through. The enclosed winch box has a cable inlet hole on the side near the guiding channel.

[0006] As a preferred technical solution of the present invention, the power mechanism includes a power motor and a variable speed transmission assembly; The power motor is installed on one side of the power box, and the output end of the power motor is connected to one end of the power shaft; The variable speed transmission assembly is located inside the power box and is connected to the power shaft and the reciprocating traction mechanism.

[0007] Based on the aforementioned scheme, the reciprocating traction mechanism includes a traction reciprocating lead screw and a traction ball nut assembly; The traction reciprocating screw is provided in two parts, which are connected and rotatably disposed between the enclosed winch box and the power box, and the two traction reciprocating screws are arranged symmetrically. The traction ball nut assembly is provided in two parts, and each part corresponds to one of the traction reciprocating screws. The traction ball nut assembly is driven on the traction reciprocating screws. The hollow traction box is positioned between the two traction ball nut assemblies.

[0008] Furthermore, based on the aforementioned scheme, the variable speed transmission assembly includes a gearbox, bevel gear one, bevel gear two, traction worm gear, and traction worm wheel; The gearbox is installed on one side of the enclosed winch housing and is located inside the power box; The bevel gear is mounted on the drive shaft; The second bevel gear is disposed on the input end of the gearbox, and the second bevel gear meshes with the first bevel gear; One end of the traction worm gear is mounted on the output end of the gearbox, and the other end is rotatably connected to the power box. There are two traction worm gears, each corresponding to a traction reciprocating screw. The traction worm gears are mounted on the traction reciprocating screws and mesh with the traction worm. Both traction worm gears are located on both sides of the traction worm.

[0009] Based on the aforementioned scheme, the guiding mechanism includes a guide shaft and a guide roller; The guide shaft is provided in two parts, and the guide shaft is installed inside the enclosed winch box; The guide rollers are provided in two, and each guide roller corresponds to a guide shaft. The guide rollers are rotatably mounted on the guide shafts, and a guide channel is formed between the two guide rollers.

[0010] As a preferred technical solution of the present invention, the hollow traction box is detachably provided with a hollow box cover on the side away from the power box, and an oil injection component is connected to the hollow box cover; The oil injection assembly includes an oil injection frame, an oil injection port, an oil injection cylinder, and an oil change tank; The oil filling rack is located on one side of the hollow tank cover; The oil filling port is connected to one side of the hollow box cover; The oil injection cylinder is installed on one side of the oil injection frame, and an oil storage part is detachably provided between the output end of the oil injection cylinder and the oil injection port; The oil change tank is connected and located on the side of the enclosed winch housing away from the power box. The oil injection cylinder and the oil injection frame can move into the oil change tank. The oil change tank is detachably equipped with an oil tank cover, which can be used for replacing the oil storage section.

[0011] Based on the aforementioned scheme, the oil storage section includes an oil storage tank; The oil storage cylinder is sealed and slidably equipped with a refueling slider. By sliding the refueling slider, maintenance oil in the oil filling cylinder can be squeezed out from one end of the oil storage cylinder. One end of the oil storage cylinder can penetrate into the oil filling port and be in sealed contact with the oil filling port. One end of the oil filling cylinder can extend into the oil filling cylinder and contact the refueling slider.

[0012] Furthermore, based on the aforementioned scheme, the hollow traction box is equipped with at least two sets of maintenance rollers with correction and oiling functions; The maintenance roller assembly includes a straightening oil injection roller; The straightening oil injection roller is provided in two parts. The straightening oil injection roller is rotatably disposed in the hollow traction box. The traction hole is located between the two straightening oil injection rollers. One end of the straightening oil injection roller can pass through the traction hole and contact the rope.

[0013] Furthermore, based on the aforementioned scheme, two wear-resistant rubber sealing rings are provided inside the traction hole, and the maintenance roller assembly is located between the two wear-resistant rubber sealing rings to block and scrape off the maintenance oil on the rope and to apply it evenly.

[0014] Furthermore, based on the aforementioned solution, a second wear-resistant rubber sealing ring is provided inside the inlet hole to scrape off impurities on the rope.

[0015] The beneficial effects of the embodiments of the present invention are as follows: 1. In this invention, by setting the power mechanism, reciprocating traction mechanism and guiding mechanism inside the power box and the enclosed winch box, a compact closed structure can be formed, which can effectively reduce the overall footprint of the equipment. At the same time, the enclosed box can effectively prevent external pollutants such as dust and impurities from entering the equipment, providing a clean working environment for the internal mechanism and significantly improving the service life and reliability of the equipment. 2. In this invention, by setting up a power mechanism and a reciprocating traction mechanism, and setting a hollow traction box on the reciprocating traction mechanism, the hollow traction box can automatically and evenly pull and arrange the rope when winding the rope, avoiding the problems of rope wear, compression deformation or even breakage caused by rope mess, overlapping and biting in traditional winches, greatly extending the service life of the rope, and ensuring the stability and safety of the lifting operation. 3. In this invention, when the rope is wound up and arranged, an oiling component and a maintenance roller group are installed in the hollow traction box. The oiling component can automatically or semi-automatically replenish the maintenance oil in the box, while the rotating straightening oiling roller can evenly apply the maintenance oil to the surface of the rope while guiding and straightening the rope. This provides continuous online lubrication and maintenance for the rope, reduces internal and external wear, prevents rust, significantly reduces the frequency and cost of manual maintenance, and achieves long-term, maintenance-free operation of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a closed winch according to one embodiment of the present invention; Figure 2 This is a partial cross-sectional structural schematic diagram of a closed winch according to one embodiment of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram of part A in the middle; Figure 4 For the present invention Figure 2 A magnified structural diagram of section B in the middle; Figure 5 For the present invention Figure 2 A magnified structural diagram of section C in the middle; Figure 6This is a schematic diagram of the structure of the power shaft, power mechanism, and reciprocating traction mechanism in one embodiment of the present invention; Figure 7 This is a partial cross-sectional structural diagram of the hollow traction box and the oil injection assembly in one embodiment of the present invention; Figure 8 This is a schematic diagram of the hollow traction box in one embodiment of the present invention.

[0018] In the diagram: 001, Power mechanism; 002, Reciprocating traction mechanism; 003, Guiding mechanism; 004, Oil injection assembly; 1. Enclosed winch housing; 2. Power box; 3. Power shaft; 4. Winding roller; 5. Rope; 6. Hollow traction box; 7. Power motor; 8. Traction reciprocating screw; 9. Traction ball nut assembly; 10. Gearbox; 11. Bevel gear one; 12. Bevel gear two; 13. Traction worm gear; 14. Traction worm wheel; 15. Guide shaft; 16. Guide roller; 17. Hollow box cover; 18. Oil filling rack; 19. Oil filling port; 20. Oil filling cylinder; 21. Oil changing tank; 22. Oil tank cover; 23. Oil reservoir; 24. Oil filling slider; 25. Straightening oil filling roller; 26. Wear-resistant rubber sealing ring one; 27. Wear-resistant rubber sealing ring two. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0020] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Example 1, as Figures 1-8 As shown, it illustrates a closed winch according to an embodiment of the present invention, including a closed winch housing 1, a power box 2, a power shaft 3, a power mechanism 001, a reciprocating traction mechanism 002, a hollow traction box 6, and a guide mechanism 003.

[0026] As described above, the power box 2 is located on one side of the enclosed winch box 1, and the power shaft 3 passes through and is rotatably mounted inside the power box 2 and the enclosed winch box 1 via bearings. A winding roller 4 is mounted on the power shaft 3, and a rope 5 is wound on the winding roller 4.

[0027] As described above, the power mechanism 001 is located on one side of the power box 2 and is connected to the power shaft 3. The power mechanism 001 includes a power motor 7 and a variable speed transmission assembly. The power motor 7 is installed on one side of the power box 2, and the output end of the power motor 7 is connected to one end of the power shaft 3. The variable speed transmission assembly is located inside the power box 2 and is connected to the reciprocating traction mechanism 002, which is located inside the power box 2 and is connected to the power mechanism 001.

[0028] The reciprocating traction mechanism 002 includes a traction reciprocating screw 8 and a traction ball nut assembly 9. There are two traction reciprocating screws 8, which are rotatably mounted between the enclosed winch box 1 and the power box 2. The two traction reciprocating screws 8 are symmetrically arranged. There are two traction ball nut assemblies 9, which correspond one-to-one with the traction reciprocating screws 8. The traction ball nut assemblies 9 are driven on the traction reciprocating screws 8. The hollow traction box 6 is located between the two traction ball nut assemblies 9.

[0029] The variable speed transmission assembly includes a gearbox 10, a first bevel gear 11, a second bevel gear 12, a traction worm gear 13, and a traction worm wheel 14. The gearbox 10 is installed on one side of the enclosed winch housing 1 and located inside the power box 2. The first bevel gear 11 is mounted on the power shaft 3, and the second bevel gear 12 is mounted on the input end of the gearbox 10, meshing with the first bevel gear 11. One end of the traction worm gear 13 is mounted on the output end of the gearbox 10, and the other end is rotatably connected to the power box 2. There are two traction worm wheels 14, each corresponding to a traction reciprocating screw 8. The traction worm wheels 14 are mounted on the traction reciprocating screw 8 and mesh with the traction worm gear 13. Both traction worm wheels 14 are located on both sides of the traction worm gear 13.

[0030] As described above, the hollow traction box 6 is mounted on the reciprocating traction mechanism 002. The hollow traction box 6 has a traction hole for the rope 5 to pass through. The guide mechanism 003 is mounted inside the enclosed winch box 1. The guide mechanism 003 is located on the side of the reciprocating traction mechanism 002 away from the winding roller 4. The guide mechanism 003 has a guide channel for the cable to pass through. The enclosed winch box 1 has a wire inlet hole on the side near the guide channel. The guide mechanism 003 includes a guide shaft 15 and guide rollers 16. There are two guide shafts 15, which are mounted inside the enclosed winch box 1. There are two guide rollers 16, which correspond one-to-one with the guide shafts 15. The guide rollers 16 are rotatably mounted on the guide shafts 15, and a guide channel is formed between the two guide rollers 16.

[0031] The specific workflow of this embodiment is as follows: Power transmission and winding: Start the power motor 7. The output end of the power motor 7 can drive the power shaft 3 to rotate. The rotation of the power shaft 3 can drive the winding roller 4 to rotate. The rotation of the winding roller 4 can perform telescopic winding and unwinding operations.

[0032] With rope traction, when the power shaft 3 rotates, the power shaft 3 simultaneously drives the first bevel gear 11 to rotate. The rotation of the first bevel gear 11 drives the second bevel gear 12 to rotate. The rotation of the second bevel gear 12 can drive the input end of the gearbox 10 to rotate. After the speed is adjusted by the gearbox 10, the output end of the gearbox 10 can drive the traction worm gear 13 to rotate. The rotation of the traction worm gear 13 can drive the two traction worm wheels 14 to rotate synchronously. The rotation of the traction worm wheels 14 can drive the traction reciprocating screw 8 connected to it to rotate. The rotation of the traction reciprocating screw 8 can drive the traction ball nut group 9 and the hollow traction box 6 to perform linear reciprocating motion on one side of the winding roller 4.

[0033] Synchronous cable laying: When the hollow traction box 6 reciprocates, the rope 5 passing through its traction hole can be continuously and evenly guided to the rotating winding roller 4. By properly matching the transmission ratio of the gearbox 10, it can be ensured that the hollow traction box 6 moves a distance equal to the diameter of one rope 5 for every rotation of the winding roller 4, thereby achieving a tight, neat, and layered arrangement of the rope 5 on the winding roller 4, completely avoiding tangled ropes and overlapping phenomena.

[0034] It should be noted that during the actual wiring process, a night vision camera can be installed on one side of the hollow traction box 6 to visually monitor the winding roller 4 after wiring.

[0035] Example 2: Based on Example 1, Example 2 of the present invention further adds an automatic lubrication and maintenance function for rope 5 to maximize the life of rope 5 and achieve maintenance-free or low-maintenance operation.

[0036] like Figure 2 , Figure 7 and Figure 8 As shown, in this embodiment, a hollow box cover 17 is detachably provided on the side of the hollow traction box 6 away from the power box 2. Inside the hollow traction box 6, along the travel direction of the rope 5, there are at least two sets of maintenance roller groups with straightening and oiling functions. The maintenance roller group includes straightening and oiling rollers 25. There are two straightening and oiling rollers 25. The straightening and oiling rollers 25 are rotatably arranged inside the hollow traction box 6. The axis of the straightening and oiling rollers 25 is perpendicular to the travel direction of the rope 5. The traction hole is located between the two straightening and oiling rollers 25. One end of the straightening and oiling roller 25 can penetrate into the traction hole and contact the rope 5. It has both a straightening and guiding function for the rope 5 and can evenly apply maintenance oil, such as lubricant, to the surface of the rope 5.

[0037] It should be noted that, in order to control the oil volume and prevent oil leakage, wear-resistant rubber sealing rings 26 are embedded in both the inlet and outlet of the traction hole. The maintenance roller assembly is located between these two wear-resistant rubber sealing rings 26. The sealing rings can scrape off excess maintenance oil on the rope 5 and prevent external dust from entering. At the same time, wear-resistant rubber sealing rings 27 are also installed in the inlet hole of the enclosed winch box 1 to scrape off mud, dust and other impurities on the surface of the rope 5 when it enters.

[0038] To achieve automatic oil filling, an oil filling assembly 004 is connected to the hollow box cover 17. The oil filling assembly 004 includes an oil filling frame 18, an oil filling port 19, an oil filling cylinder 20, and an oil changing tank 21. The oil filling frame 18 is located on one side of the hollow box cover 17, the oil filling port 19 is connected to one side of the hollow box cover 17, the oil filling cylinder 20 is installed on one side of the oil filling frame 18, and an oil storage section is detachably provided between the output end of the oil filling cylinder 20 and the oil filling port 19. The oil changing tank 21 is connected to the side of the enclosed winch box 1 away from the power box 2. The oil filling cylinder 20 and the oil filling frame 18 can move into the oil changing tank 21. An oil tank cover 22 is detachably provided on the oil changing tank 21, which can be used to replace the oil storage section.

[0039] The oil storage section includes an oil storage cylinder 23, and an oil filling slider 24 is slidably disposed inside the oil storage cylinder 23. By sliding the oil filling slider 24, maintenance oil in the oil filling cylinder can be squeezed out from one end of the oil storage cylinder 23. One end of the oil storage cylinder 23 can penetrate into the oil filling port 19 and be in sealed contact with the oil filling port 19. One end of the oil filling cylinder 20 can extend into the oil filling cylinder and contact the oil filling slider 24.

[0040] Specifically, the oil outlet of the oil reservoir 23 is designed to be sealed and connected with the oil inlet 19. The piston rod of the oil injection cylinder 20 can extend into the oil reservoir 23 and push the oiling slider 24 to move, thereby squeezing the maintenance oil in the oil reservoir 23 from the oil outlet and injecting it into the hollow traction box 6 through the oil inlet 19.

[0041] To facilitate the replacement of the oil reservoir 23, an oil change tank 21 is also connected to one side of the enclosed winch box 1. The oil change tank 21 is equipped with an openable tank cover 22. When it is necessary to add or change oil, the reciprocating traction mechanism 002 is controlled to move, so that the oil filling component 004 on the hollow traction box 6 is moved into the oil change tank 21. The operator can open the tank cover 22 to easily disassemble the old oil reservoir 23 and install a new full oil reservoir 23.

[0042] The specific maintenance workflow in this embodiment is as follows: Automatic lubrication is provided, and the system can be programmed with a regular lubrication schedule. When lubrication is required, the oil injection cylinder 20 is activated, pushing the oil filling slider 24 inside the oil reservoir 23 to inject a measured amount of maintenance oil into the hollow traction box 6.

[0043] The injected maintenance oil is evenly applied and soaked into the straightening oiling roller 25. When the rope 5 moves, the rotating straightening oiling roller 25 can evenly and continuously apply the maintenance oil to the surface of the rope 5, forming a protective oil film.

[0044] Oil level control and sealing: The wear-resistant rubber sealing ring 26 scrapes off excess oil from the rope 5, allowing it to circulate within the box. It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A closed-type winch, comprising a closed winch housing (1), characterized in that, Also includes: The power box (2) is located on one side of the enclosed winch box (1); A power shaft (3) is installed through and rotatably inside the power box (2) and the enclosed winch box (1). A winding roller (4) is installed on the power shaft (3), and a rope (5) is wound on the winding roller (4). A power mechanism (001) is disposed on one side of the power box (2), and the power mechanism (001) is connected to the power shaft (3); A reciprocating traction mechanism (002) is installed inside the power box (2), and the reciprocating traction mechanism (002) is connected to the power mechanism (001); A hollow traction box (6) is installed on the reciprocating traction mechanism (002), and a traction hole for the rope (5) to pass through is provided inside the hollow traction box (6); The guide mechanism (003) is located inside the enclosed winch box (1). The guide mechanism (003) is located on the side of the reciprocating traction mechanism (002) away from the winding roller (4). The guide mechanism (003) is provided with a guide channel for the cable to pass through. The enclosed winch box (1) has a cable inlet hole on the side close to the guide channel.

2. The closed-type winch according to claim 1, characterized in that, The power mechanism (001) includes: A power motor (7) is installed on one side of the power box (2), and the output end of the power motor (7) is connected to one end of the power shaft (3); A variable speed transmission assembly is disposed in the power box (2) and connected to the power shaft (3) and the reciprocating traction mechanism (002).

3. A closed-type winch according to claim 2, characterized in that, The reciprocating traction mechanism (002) includes: Two traction reciprocating screws (8) are provided. The traction reciprocating screws (8) pass through and are rotatably disposed between the enclosed winch box (1) and the power box (2). The two traction reciprocating screws (8) are arranged symmetrically. Two traction ball nut assemblies (9) are provided, and they correspond one-to-one with the traction reciprocating screw (8). The traction ball nut assemblies (9) are driven on the traction reciprocating screw (8). The hollow traction box (6) is positioned between the two traction ball nut groups (9).

4. A closed-type winch according to claim 3, characterized in that, The variable speed transmission assembly includes: The gearbox (10) is installed on one side of the enclosed winch housing (1) and located inside the power box (2); A bevel gear (11) is mounted on the power shaft (3); A second bevel gear (12) is disposed on the input end of the gearbox (10), and the second bevel gear (12) meshes with the first bevel gear (11); The traction worm (13) has one end set on the output end of the gearbox (10) and the other end rotatably connected to the power box (2); Two traction worm gears (14) are provided. Each traction worm gear (14) corresponds to a traction reciprocating screw (8). The traction worm gear (14) is mounted on the traction reciprocating screw (8). The traction worm gear (14) meshes with the traction worm (13). Both traction worm gears (14) are located on both sides of the traction worm (13).

5. A closed-type winch according to claim 4, characterized in that, The guidance mechanism (003) includes: Two guide shafts (15) are provided, and the guide shafts (15) are arranged inside the enclosed winch box (1); There are two guide rollers (16), and each guide roller (16) corresponds to a guide shaft (15). The guide rollers (16) are rotatably mounted on the guide shaft (15), and a guide channel is formed between the two guide rollers (16).

6. A closed-type winch according to claim 5, characterized in that, The hollow traction box (6) is detachably provided with a hollow box cover (17) on the side away from the power box (2), and an oil injection component (004) is connected to the hollow box cover (17). The oil injection assembly (004) includes: The oil filling rack (18) is located on one side of the hollow box cover (17); The oil inlet (19) is connected to one side of the hollow box cover (17); An oil injection cylinder (20) is installed on one side of the oil injection frame (18), and an oil storage part is detachably provided between the output end of the oil injection cylinder (20) and the oil injection port (19); The oil change tank (21) is connected to the side of the enclosed winch box (1) away from the power box (2). The oil injection cylinder (20) and the oil injection frame (18) can move into the oil change tank (21). The oil change tank (21) is detachably equipped with an oil tank cover (22) which can be used for replacing the oil storage section.

7. A closed-type winch according to claim 6, characterized in that, The oil storage unit includes: An oil reservoir (23) is sealed and slidably equipped with an oil filling slider (24). By sliding the oil filling slider (24), maintenance oil in the oil filling cylinder can be squeezed out from one end of the oil reservoir (23). One end of the oil reservoir (23) can penetrate into the oil filling port (19) and be in sealed contact with the oil filling port (19). One end of the oil filling cylinder (20) can extend into the oil filling cylinder and contact the oil filling slider (24).

8. A closed-type winch according to claim 7, characterized in that, The hollow traction box (6) is equipped with at least two sets of maintenance rollers with correction and oiling functions; The maintenance roller assembly includes: There are two straightening oil injection rollers (25). The straightening oil injection rollers (25) are rotatably disposed in the hollow traction box (6). The traction hole is located between the two straightening oil injection rollers (25). One end of the straightening oil injection roller (25) can pass through the traction hole and contact the rope (5).

9. A closed-type winch according to claim 8, characterized in that, The traction hole is provided with two wear-resistant rubber sealing rings (26), and the maintenance roller group is located between the two wear-resistant rubber sealing rings (26) to block and scrape off the maintenance oil on the rope (5) and apply it evenly.

10. A closed-type winch according to claim 9, characterized in that, The inlet hole is provided with a wear-resistant rubber sealing ring 2 (27) for scraping off impurities on the rope (5).

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