Pulley block structure capable of being quickly disassembled and assembled and winch traction equipment

Abstract

The utility model discloses a quick dismountable pulley block structure and winch traction equipment, which comprise a main shaft and a threaded seat matched with the main shaft, the threaded seat is embedded below a mounting surface, a plugging nut is arranged in the threaded seat, a groove is arranged on the upper part of the plugging nut, and a bulge matched with the groove is arranged on the bottom end surface of the main shaft. And the bulge can be inserted into the groove and can rotate in the groove. According to the utility model, the actions in the disassembly and assembly process are simplified, the number of used tools is reduced, the disassembly and assembly of the pulley block can be completed by using fewer action steps and tools, the number of parts of the disassembled pulley block is reduced, and the situation that the pulley block cannot be normally used due to the loss of part of the parts is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pulley block technology, specifically to a pulley block structure that can be quickly disassembled and assembled, and a winch traction device. Background Technology

[0002] Currently, in the use of some wire rope winch traction equipment, pulley blocks are often required for adjusting the traction direction of the wire rope. In some special situations, these pulley blocks, which are positioned above the installation surface, can interfere with other work outside of operating hours, and therefore need to be removed.

[0003] Please refer to Figure 1 The original pulley block used a square flange mounting method. This meant the pulley block connected to the pulley base via the square flange at the bottom, and was then secured with four sets of bolts, flat washers, spring washers, and nuts using two sets of wrenches. When installing the wire rope into the pulley groove, the wire rope retaining pin needed to be disassembled using a separate set of wrenches. After the wire rope was inserted into the groove, the wire rope retaining pin was then reinstalled and tightened.

[0004] This approach has many drawbacks:

[0005] Firstly, the original pulley system required the tightening and loosening of four sets of bolts during disassembly and installation. Each bolt required two wrenches to hold the bolt and nut at the outer hexagonal angle for tightening, resulting in numerous operation points, increased labor intensity, and extended work time. Secondly, small parts such as the four sets of bolts, nuts, washers, and spring washers were easily lost during storage and retrieval, leading to subsequent malfunctions.

[0006] Secondly, the wire rope stop pin also needs to be manually disassembled and installed with a wrench each time it is used, which is cumbersome and also poses a risk of loss.

[0007] Thirdly, since bolt connections require insertion from the top or bottom of the mounting hole, and space needs to be left at the bottom of the mounting hole for wrench operation, a mounting base needs to be reserved on the mounting surface. Generally, the mounting base protrudes above the mounting surface, which means that after disassembling the pulley block, the reserved base will be significantly higher than the mounting surface, causing problems for other work on the mounting surface (e.g., vehicle passage, heavy object handling).

[0008] Fourth, the presence of the base increases the height of the wire rope above the installation surface during use, leading to a greater bending moment at the base. To reduce the stress on the base and bolts, a smaller sliding bearing design is used in the pulley block, reducing the vertical height. While the use of sliding bearings reduces the installation height, their coefficient of friction is higher than that of rolling bearings, resulting in a decrease in the force transmitted by the wire rope. Utility Model Content

[0009] The purpose of this utility model is to at least partially solve one of the aforementioned technical problems.

[0010] To address this, this utility model proposes a pulley block structure that can be quickly disassembled and assembled, simplifying the disassembly and assembly process and reducing the number of tools required. It enables the disassembly and assembly of the pulley block to be completed with fewer steps and tools, and also reduces the number of parts in the pulley block after disassembly, avoiding the loss of some parts that would render the pulley block unusable. Furthermore, it allows for lowering the base height or making the base height flush with the mounting surface after the pulley block is disassembled, thus not affecting other work.

[0011] To achieve the above objectives, the first aspect of this utility model provides a pulley block structure that can be quickly disassembled and assembled, comprising:

[0012] A main spindle, and a threaded seat that mates with the main spindle;

[0013] The threaded seat is embedded below the mounting surface, and a sealing nut is provided inside it. A groove is opened on the upper part of the sealing nut.

[0014] The bottom end face of the spindle is provided with a protrusion that mates with the groove. The protrusion can be inserted into the groove and can rotate within the groove.

[0015] According to one embodiment of the present invention, the main shaft is connected from bottom to top to a lower cover plate, a pulley, a ball bearing and an upper cover plate;

[0016] The lower cover plate and the upper cover plate are symmetrically arranged, and the pulley and the ball bearing are sequentially arranged between the lower cover plate and the upper cover plate.

[0017] According to one embodiment of the present invention, the top of the main shaft is provided with an internal hexagonal structure, configured for quick installation and disassembly of the pulley block structure.

[0018] According to one embodiment of the present invention, it further includes: a rotating pin, a cotter pin, a wire rope limiting block, and a pin with a tongue;

[0019] The rotating pin, the cotter pin, the wire rope limiting block, and the tongue pin are all installed at one end of the lower cover plate and the upper cover plate;

[0020] The rotating pin is fixedly connected to the pulley block structure, the cotter pin is opened on the rotating pin, the wire rope limiting block is rotatably connected to the rotating pin through the cotter pin, and the tongue pin is movably connected to the wire rope limiting block.

[0021] According to one embodiment of the present invention, the wire rope limiting block is provided with an opening, and the tongue pin can be connected to the opening.

[0022] According to one embodiment of the present invention, it further includes: a locking nut and a locking washer;

[0023] The locking nut is installed at the top of the main shaft and is configured to fasten the various components installed on the main shaft from the upper part of the main shaft; the stop washer is installed at the lower end of the locking nut and is configured to prevent the pulley block structure from loosening during use.

[0024] According to one embodiment of the present invention, it further includes: an oil injection nozzle and an oil distribution ring;

[0025] The grease nipple is installed at the bottom of the internal hexagonal structure and is configured to add grease to the ball bearing, wherein the ball bearing includes at least two sets;

[0026] The oil distribution ring is installed between the two sets of ball bearings, and the grease is injected into the two sets of ball bearings through the connecting channel on the spindle and the oil distribution ring.

[0027] According to one embodiment of the present invention, the ball bearing has a dustproof ring on one side, while the oil distribution ring does not have dustproof rings on either side, configured to allow the grease to enter the interior of the ball bearing; and the ball bearing has a dustproof ring on the other side, configured to prevent dust from entering.

[0028] According to one embodiment of the present invention, it further includes: a fastening nut, a fastening bolt, and a support tube;

[0029] The fastening nut and the fastening bolt are fixed to the lower cover plate and the upper cover plate at the opposite ends of the rotating pin, cotter pin, wire rope limiting block and tongue pin;

[0030] The support tube is installed between the lower cover plate and the upper cover plate, and is configured to limit the height of the lower cover plate and the upper cover plate;

[0031] The bottom of the lower cover plate is provided with four drainage holes.

[0032] To achieve the above objectives, the second aspect of this utility model provides a winch traction device, which includes the pulley block structure that can be quickly disassembled and assembled as described in any one of the first aspects.

[0033] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0034] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0035] This utility model provides a pulley block structure that can be quickly disassembled and assembled, simplifying the disassembly and assembly process and reducing the number of tools used. It enables the disassembly and assembly of the pulley block to be completed with fewer action steps and tools, reducing the number of parts in the pulley block after disassembly and avoiding the loss of some parts that would render the pulley block unusable. At the same time, it also allows the base height to be lowered or made flush with the mounting surface after the pulley block is disassembled, so as not to affect the operation of other work.

[0036] To better understand the technical means of this utility model and to facilitate its implementation according to the description, and to make the above and other objects, features, and advantages of this utility model more apparent, preferred embodiments are described below in detail with reference to the accompanying drawings. Other features and advantages of this utility model will be set forth in the following description and will be apparent in part from the description, or may be realized by practicing the utility model. The objects and other advantages of this utility model can be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the traditional pulley system.

[0039] Figure 2 This is a structural schematic diagram of a pulley block that can be quickly disassembled and assembled according to an embodiment of the present invention;

[0040] Figure 3 This is another structural schematic diagram of a pulley block that can be quickly disassembled and assembled according to an embodiment of the present utility model;

[0041] Figure 4 This is a schematic diagram of the first step of the installation structure of a pulley block that can be quickly disassembled and assembled according to an embodiment of the present utility model;

[0042] Figure 5 This is a schematic diagram of the second step of the installation structure of a pulley block that can be quickly disassembled and assembled according to an embodiment of the present utility model;

[0043] Figure 6 This is a schematic diagram of the third step of the installation structure of a pulley block that can be quickly disassembled and assembled according to an embodiment of the present utility model.

[0044] Figure label:

[0045] 1-Original pulley block base; 2-Original pulley block bolt; 3-Flat washer; 4-Spring washer; 5-Original pulley block nut; 6-Wire rope stop pin; 7-Original pulley block; 8-Wrench;

[0046] 9-Main shaft; 10-Lower cover plate; 11-Pulley; 12-Ball bearing; 13-Upper cover plate; 14-Stop washer; 15-Locking nut; 16-Oil nozzle; 17-Oil distribution ring; 18-Fastening nut; 19-Fastening bolt; 20-Support tube; 21-Threaded seat; 22-Sealing nut; 23-Rotating pin; 24-Cotter pin; 25-Wire rope limit block; 26-Pin with tongue. Detailed Implementation

[0047] 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0049] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0050] Please refer to Figure 1 Because the original pulley block used a square flange installation method, meaning the pulley block connected to the pulley base via the square flange at the bottom, and was then secured with four sets of bolts, flat washers, spring washers, and nuts using two sets of wrenches. When installing the wire rope into the pulley groove, the wire rope retaining pin also needed to be disassembled using a separate set of wrenches. After the wire rope was inserted into the groove, the wire rope retaining pin was then reinstalled and tightened.

[0051] This method has many drawbacks, such as: numerous operation points, increased labor intensity, extended operation time, and the easy loss of small parts after disassembly, leading to subsequent unusability. The wire rope stop pin also requires manual disassembly and assembly with a wrench each time it is used, making the operation cumbersome.

[0052] To solve the above problems, this utility model provides a pulley block structure and winch traction device that can be quickly disassembled and assembled.

[0053] Please refer to Figures 2-3 The present invention provides a pulley block structure that can be quickly disassembled and assembled, comprising: a main shaft 9, and a threaded seat 21 that cooperates with the main shaft 9;

[0054] The threaded seat 21 is embedded below the mounting surface, and a sealing nut 22 is provided inside it. The upper part of the sealing nut 22 has a groove.

[0055] The bottom end face of the main shaft 9 is provided with a protrusion that cooperates with the groove. The protrusion can be inserted into the groove and can rotate within the groove.

[0056] Understandably, the groove on the upper part of the sealing nut 21 has an internal thread, and the protrusion on the bottom end face of the main shaft 9 has an external thread. The external thread on the protrusion can be screwed into the internal thread in the groove until its positioning shoulder is aligned with the mounting surface, thus completing the installation of the pulley block structure.

[0057] It is also understandable that when the spindle 9 rotates in the threaded groove, the dustproof nut also rotates and rises and falls, so that after the pulley block structure is unscrewed, the dustproof nut remains on the upper surface of the threaded seat 21 and flush with the mounting surface, preventing debris from entering the threaded seat 21.

[0058] This utility model provides a quick-disassembly and assembly pulley block structure, which simplifies the disassembly and assembly process and reduces the number of tools used. It enables the disassembly and assembly of the pulley block to be completed with fewer steps and tools, reducing the number of parts in the pulley block after disassembly and avoiding the loss of some parts that would render the pulley block unusable. At the same time, it also allows the base height to be lowered or made flush with the mounting surface after the pulley block is disassembled, so as not to affect the operation of other work.

[0059] In one embodiment of this utility model, the main shaft 9 is connected from bottom to top to a lower cover plate 10, a pulley 11, a ball bearing 12 and an upper cover plate 13.

[0060] The lower cover plate 10 and the upper cover plate 13 are symmetrically arranged, and the pulley 11 and the ball bearing 12 are sequentially arranged between the lower cover plate 10 and the upper cover plate 13.

[0061] It is understandable that the lower cover plate 10 is positioned in conjunction with the shoulder on the main spindle 9.

[0062] In one embodiment of this utility model, the top of the main shaft 9 is provided with an internal hexagonal structure, configured for quick installation and disassembly of the pulley block structure.

[0063] In one embodiment of this utility model, it further includes: a rotating pin 23, a cotter pin 24, a wire rope limiting block 25, and a tongue pin 26;

[0064] The rotating pin 23, the cotter pin 24, the wire rope limiting block 25, and the tongue pin 26 are all installed at one end of the lower cover plate 10 and the upper cover plate 13;

[0065] The rotating pin 23 is fixedly connected to the pulley block structure, the cotter pin 24 is formed on the rotating pin 23, the wire rope limiting block 25 is rotatably connected to the rotating pin 23 through the cotter pin 24, and the tongue pin 26 is movably connected to the wire rope limiting block 25.

[0066] It is understood that the wire rope limiting block 25 is used to confine the wire rope within the pulley groove and prevent it from coming out.

[0067] Understandably, the tongue pin 26 can be manually pulled out from one side, at which point the wire rope limit block 25 can rotate around the rotating pin 23, allowing the wire rope to enter and exit the pulley groove.

[0068] In one embodiment of this utility model, the wire rope limiting block 25 is provided with an opening, and the tongue pin 26 can be connected to the opening.

[0069] Understandably, the tongue pin 26 can be connected to the opening on the wire rope limit block 25 via an iron chain to prevent it from being lost.

[0070] In one embodiment of this utility model, it further includes: a locking nut 15 and a stop washer 14;

[0071] The locking nut 15 is installed at the top of the main shaft 9 and is configured to fasten the various components installed on the main shaft 9 from the upper part of the main shaft 9 to prevent them from loosening; the stop washer 14 is installed at the lower end of the locking nut 15 and is configured to prevent the pulley block structure from loosening during use.

[0072] In one embodiment of this utility model, it further includes: an oil nozzle 16 and an oil distribution ring 17;

[0073] The grease nipple 16 is installed at the bottom of the internal hexagonal structure and is configured to add grease to the ball bearing 12, wherein the ball bearing 12 includes at least two sets;

[0074] The oil distribution ring 17 is installed between the two sets of ball bearings 12, and the grease is finally injected into the two sets of ball bearings 12 through the connecting channel on the main shaft 9 and the oil distribution ring 17.

[0075] In one embodiment of this utility model, the ball bearing 12 is a type with a dustproof ring on one side, and the oil distribution ring 17 does not have dustproof rings on both sides, which is configured to allow the grease to enter the interior of the ball bearing 12; and the other side of the ball bearing 12 has a dustproof ring, which is configured to prevent dust from entering.

[0076] In one embodiment of this utility model, it further includes: a fastening nut 18, a fastening bolt 19, and a support tube 20;

[0077] The fastening nut 18 and the fastening bolt 19 are fixed to the lower cover plate 10 and the upper cover plate 13 at the other end opposite to the rotating pin 23, the cotter pin 24, the wire rope limiting block 25 and the tongue pin 26.

[0078] The support tube 20 is installed between the lower cover plate 10 and the upper cover plate 13, and is configured to limit the height of the lower cover plate 10 and the upper cover plate 13, so as to prevent the fastening nut 18 and the fastening bolt 19 from squeezing and deforming it.

[0079] The bottom of the lower cover plate 10 is provided with four drainage holes. It can be understood that the number is not limited to four; it can also be three, two, or one or more. The purpose of providing drainage holes is to prevent water from accumulating in the lower cover plate 10 or the upper cover plate 13 due to factors such as rainfall.

[0080] Please refer to Figures 4-6 The working principle of the quick-assembly and disassembly pulley block structure provided by this utility model is as follows:

[0081] First, refer to Figure 4 Align the protrusion at the bottom of the main shaft 9 of the pulley block structure with the groove of the sealing nut 22. First, manually screw the main shaft 9 of the pulley block structure counterclockwise into the threaded seat 21. Then, use a tool with an internal hexagonal structure to insert into the internal hexagonal groove at the top of the main shaft 9 of the pulley block structure and manually tighten it.

[0082] Secondly, refer to Figure 5 Pull out the tongue pin 26, and the wire rope limit block 25 will rotate about 90°. At this time, the wire rope can be put into the pulley groove through the opening of the rotated wire rope limit block 25.

[0083] Finally, refer to Figure 6Flip the wire rope limiting block 25 in the opposite direction and align it with the shaft hole of the upper cover plate 13. Then insert the tongue pin 26 to lock the wire rope limiting block 25. At this time, the wire rope is restricted in the pulley groove and the pulley block structure can be used normally.

[0084] Based on the above, the process of disassembling the pulley block structure is exactly the reverse of its installation process.

[0085] In another embodiment of the present invention, a winch traction device is also provided, the winch traction device comprising the pulley block structure that can be quickly disassembled and assembled as described in any of the above embodiments.

[0086] The beneficial effects of the quick-assembly and disassembly pulley block structure provided by this utility model are:

[0087] It simplifies the disassembly and assembly process and reduces the number of tools required, enabling the disassembly and assembly of pulley blocks to be completed with fewer steps and tools. This reduces the number of parts in the pulley block after disassembly, preventing the pulley block from becoming unusable due to the loss of some parts. It also allows for lowering the base height or making the base height flush with the mounting surface after the pulley block is disassembled, so as not to affect the operation of other tasks.

[0088] This solution addresses the previous issue of requiring the tightening and loosening of four sets of bolts during the disassembly and installation of pulley systems. Each bolt required two wrenches to hold the bolt and nut at different hexagonal angles for tightening, increasing the number of operation points, labor intensity, and working time. Furthermore, the disassembled bolts, nuts, washers, and spring washers were prone to loss during storage and retrieval, leading to subsequent malfunctions.

[0089] This solves the problem that wire rope stop pins need to be manually disassembled and reassembled with a wrench every time they are used, which is cumbersome and also poses a risk of loss.

[0090] This solves the problem that bolt connections require insertion from the top or bottom of the mounting hole, and space needs to be left at the bottom of the mounting hole for wrench operation. Therefore, a mounting base needs to be reserved on the mounting surface. Generally, the mounting base is higher than the mounting surface, which means that after disassembling the pulley block, the reserved base is much higher than the mounting surface, which will cause trouble for other work on the mounting surface (such as vehicle passage, heavy object handling, etc.).

[0091] The presence of the base increases the height of the wire rope above the installation surface, leading to a greater bending moment at the base. To reduce the stress on the base and bolts, a smaller sliding bearing design was used in the pulley block, reducing the vertical height. While the use of sliding bearings reduces the installation height, their higher coefficient of friction compared to rolling bearings causes a decrease in the force transmitted by the wire rope.

[0092] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0093] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0094] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0095] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of the claims of this utility model pending approval.

Claims

1. A pulley block structure that can be quickly assembled and disassembled, characterized in that, include: A main spindle (9) and a threaded seat (21) that mates with the main spindle (9); The threaded seat (21) is embedded below the mounting surface, and a sealing nut (22) is provided inside it. The sealing nut (22) has a groove on its upper part. The bottom end face of the main shaft (9) is provided with a protrusion that cooperates with the groove. The protrusion can be inserted into the groove and can rotate within the groove.

2. The quick-assembly and detachable pulley block structure according to claim 1, characterized in that, The main shaft (9) is connected from bottom to top to a lower cover plate (10), a pulley (11), a ball bearing (12) and an upper cover plate (13); The lower cover plate (10) and the upper cover plate (13) are symmetrically arranged, and the pulley (11) and the ball bearing (12) are arranged sequentially between the lower cover plate (10) and the upper cover plate (13).

3. The quick-assembly and disassembly pulley block structure according to claim 2, characterized in that, The top of the main shaft (9) is provided with an internal hexagonal structure, configured for quick installation and disassembly of the pulley block structure.

4. The quick-assembly and disassembly pulley block structure according to claim 3, characterized in that, Also includes: Rotating pin (23), cotter pin (24), wire rope limiting block (25) and tongue pin (26); The rotating pin (23), the cotter pin (24), the wire rope limiting block (25), and the tongue pin (26) are all installed at one end of the lower cover plate (10) and the upper cover plate (13); The rotating pin (23) is fixedly connected to the pulley block structure, the cotter pin (24) is opened on the rotating pin (23), the wire rope limiting block (25) is rotatably connected to the rotating pin (23) through the cotter pin (24), and the tongue pin (26) is movably connected to the wire rope limiting block (25).

5. The quick-assembly and disassembly pulley block structure according to claim 4, characterized in that, The wire rope limiting block (25) is provided with an opening, and the tongue pin (26) can be connected to the opening.

6. The quick-assembly and disassembly pulley block structure according to claim 4, characterized in that, Also includes: Locking nut (15) and locking washer (14); The locking nut (15) is installed at the top of the main shaft (9) and is configured to fasten the components installed on the main shaft (9) from the upper part of the main shaft (9); the stop washer (14) is installed at the lower end of the locking nut (15) and is configured to prevent the pulley block structure from loosening during use.

7. The quick-assembly and detachable pulley block structure according to claim 6, characterized in that, Also includes: Oil injector (16) and oil distribution ring (17); The grease nipple (16) is installed at the bottom of the internal hexagonal structure and is configured to add grease to the ball bearing (12), wherein the ball bearing (12) comprises at least two sets; The oil distribution ring (17) is installed between the two sets of ball bearings (12), and the grease is injected into the two sets of ball bearings (12) through the connecting channel on the main shaft (9) and the oil distribution ring (17).

8. The quick-assembly and detachable pulley block structure according to claim 7, characterized in that, The ball bearing (12) has a dustproof ring on one side, while the oil distribution ring (17) does not have dustproof rings on either side, which is configured to allow the grease to enter the ball bearing (12); and the ball bearing (12) has a dustproof ring on the other side, which is configured to prevent dust from entering.

9. The quick-assembly and disassembly pulley block structure according to claim 4, characterized in that, Also includes: Fastening nuts (18), fastening bolts (19), and support tubes (20); The fastening nut (18) and the fastening bolt (19) are fixed to the lower cover plate (10) and the upper cover plate (13) at the opposite ends of the rotating pin (23), the cotter pin (24), the wire rope limiting block (25) and the tongue pin (26); The support tube (20) is installed between the lower cover plate (10) and the upper cover plate (13) and is configured to limit the height of the lower cover plate (10) and the upper cover plate (13); The bottom of the lower cover plate (10) is provided with four drainage holes.

10. A winch traction device, characterized in that, The pulley block structure includes any one of claims 1-9 that can be quickly disassembled and assembled.

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