Steel wire rope winding device and lifting apparatus

Abstract

A steel wire rope winding device and a lifting apparatus, relating to the technical field of lifting. The steel wire rope winding device comprises a spreader assembly (100), a drum (200) and a guide pulley assembly (300); the drum (200) is arranged above the spreader assembly (100); the guide pulley assembly (300) is arranged above the spreader assembly (100) and is arranged opposite to the drum (200); the guide pulley assembly (300) comprises roper-lowering pulleys (310) and first redirecting pulleys (320); and the distance from each first redirecting pulley (320) to the drum (200) is greater than the distance from the corresponding rope-lowering pulley (310) to the drum (200). Therefore, the width of a steel wire rope (400) wound on the drum (200) is increased. When the steel wire rope (400) of the same length is wound, a drum (200) having a smaller diameter, and a coupling and a speed reducer that each have a smaller size can be used, thereby reducing the torque output requirement for the speed reducer, reducing the size of a driving apparatus, and reducing use costs.

Description

Wire rope winding device and lifting equipment

[0001] This application claims priority to Chinese Patent Application No. 202411186083.8, filed on August 27, 2024, entitled “Wire Rope Winding Device and Lifting Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of crane technology, and in particular to a wire rope winding device and lifting equipment. Background Technology

[0003] With the development of modern logistics, container gantry cranes are increasingly used in various ports and terminals, becoming an important tool in terminal yards. The lifting mechanism of a container gantry crane mainly includes a drive unit, a drum, and a wire rope winding mechanism. Due to the limitation of the wire rope deflection angle, a drum with a large diameter needs to be designed to match a drive unit with a large output torque. The drive unit and drum are large in size and weight, resulting in high cost. Technical solutions

[0004] This invention provides a wire rope winding device and lifting equipment to solve the problems of large size, weight and high cost of existing wire rope winding devices and drive devices and drums.

[0005] This invention provides a wire rope winding device, comprising:

[0006] Lifting gear components;

[0007] A drum is positioned above the lifting device assembly and is used to wind the rope.

[0008] A guide pulley assembly is disposed above the lifting device assembly and opposite to the drum; the guide pulley assembly includes a lower rope pulley and a first redirecting pulley; the distance from the first redirecting pulley to the drum is greater than the distance from the corresponding lower rope pulley to the drum; the first ends of the two ropes pass through the corresponding first redirecting pulley and the lower rope pulley in sequence and are then connected to the lifting device assembly.

[0009] According to the present invention, a wire rope winding device is provided, wherein the guide pulley assembly includes two lower rope pulleys and two first redirecting pulleys, the two lower rope pulleys are vertically arranged and spaced apart along the length direction of the drum; the two first redirecting pulleys are respectively arranged on opposite sides of the two lower rope pulleys.

[0010] According to a wire rope winding device provided by the present invention, the first redirecting pulley is horizontally arranged, and the center plane of the rope groove of the first redirecting pulley is at the same height as the bottom surface of the drum.

[0011] According to a wire rope winding device provided by the present invention, the center plane of the rope groove of the first redirecting pulley forms an acute angle with the horizontal plane; the height of the first redirecting pulley near the drum is less than the height of the first redirecting pulley away from the drum, and the height of the first redirecting pulley is greater than the height of the bottom surface of the drum; or, the height of the first redirecting pulley near the drum is greater than the height of the first redirecting pulley away from the drum, and the height of the first redirecting pulley is less than the height of the bottom surface of the drum.

[0012] According to a wire rope winding device provided by the present invention, the center of the first redirecting pulley is located on the side of the corresponding lower rope pulley away from the drum.

[0013] According to the present invention, a wire rope winding device is provided in which the two first redirecting pulleys are equidistant from the drum.

[0014] According to the present invention, in a wire rope winding device, the distance between the two first redirecting pulleys on opposite sides is less than the length of the drum.

[0015] According to the present invention, a wire rope winding device is provided in which the two lower rope pulleys are equidistant from the drum.

[0016] According to the present invention, in a wire rope winding device, the two lower rope pulleys are at the same height, and the top height of the rope groove of the lower rope pulley is the same as the height of the corresponding first redirecting pulley rope groove.

[0017] According to the present invention, in a wire rope winding device, the tangent at the top of the groove of the lower rope pulley is tangent to the groove of the corresponding first redirecting pulley.

[0018] According to the present invention, the distance between the two lower rope pulleys on the side closer to the drum is less than the distance between the two lower rope pulleys on the side farther away from the drum, and the center planes of the rope grooves of the two lower rope pulleys form an acute angle.

[0019] According to the present invention, a wire rope winding device is provided in which the outer diameters of the two lower rope pulleys are equal, and the outer diameters of the two first redirecting pulleys are equal.

[0020] The present invention also provides a lifting device, including a drive device and a wire rope winding device as described in any of the above claims, wherein the rotating shaft of the drive device is connected to the drum, and the drive device is used to drive the drum to rotate.

[0021] The wire rope winding device and lifting equipment provided by the present invention increase the distance from the tangent point of the first redirecting pulley and the wire rope to the drum by making the distance from the first redirecting pulley to the drum greater than the distance from the corresponding lower rope pulley to the drum. Under the condition that the wire rope deflection angle is the same, a smaller diameter drum and a drive device with smaller size and torque can be used, thereby reducing the torque output requirements of the drive device, reducing the size and weight of the drive device, and reducing costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a three-dimensional structural schematic diagram of the wire rope winding device provided by the present invention;

[0024] Figure 2 is a side view of the wire rope winding device provided by the present invention.

[0025] Figure 3 is a top view of the wire rope winding device provided by the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Lifting device assembly; 101. Lifting device body; 102. Upper frame pulley; 110. Pulley block; 111. Second redirecting pulley; 112. Third redirecting pulley; 200. Drum; 300. Guide pulley assembly; 310. Lower rope pulley; 320. First redirecting pulley; 400. Rope. Embodiments of the present invention

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] The specific structure and working principle of the wire rope winding device of the present invention are described below with reference to Figures 1-3.

[0030] Figure 1 illustrates a three-dimensional structural schematic diagram of the wire rope winding device provided by the present invention. Referring to Figure 1, the wire rope winding device includes a lifting assembly 100, a drum 200, and a guide pulley assembly 300. The drum 200 is disposed above the lifting assembly 100 and is used to wind the rope 400. The guide pulley assembly 300 is disposed above the lifting assembly 100 and is disposed opposite to the drum 200. The guide pulley assembly 300 includes a lower rope pulley 310 and a first redirecting pulley 320. The distance from the first redirecting pulley 320 to the drum 200 is greater than the distance from the corresponding lower rope pulley 310 to the drum 200. The first ends of the two ropes 400 pass sequentially around the corresponding first redirecting pulley 320 and lower rope pulley 310 before connecting to the lifting assembly 100.

[0031] It should be noted that the distance from the first redirecting pulley 320 to the drum 200 refers to the horizontal distance from the center of the first redirecting pulley 320 to the central axis of the drum 200, and the distance from the lower rope pulley 310 to the drum 200 refers to the horizontal distance from the center of the lower rope pulley 310 to the central axis of the drum 200.

[0032] The wire rope winding device provided by the present invention increases the width of the wire rope wound on the drum 200 by making the distance from the first redirecting pulley 320 to the drum 200 greater than the distance from the corresponding lower rope pulley 310 to the drum 200. When winding the same length of wire rope, a smaller diameter drum 200, as well as a smaller coupling and reducer, can be used, reducing the torque output requirements of the reducer, reducing the size of the drive device, and reducing the cost of use.

[0033] In one embodiment of the present invention, the rope 400 can be a wire rope, a chain, a rope, or other types of rope.

[0034] In one embodiment of the present invention, the drum 200 is horizontally positioned above one end of the lifting device assembly 100. The distance between the drum 200 and the lifting device assembly 100 can be controlled by controlling the length of the rope 400 output by the drum 200. The smaller the diameter of the drum 200, the lower the torque output requirement of the drive device, thus allowing the use of a smaller drive device, which not only reduces the operating cost but also decreases the weight of the drive device.

[0035] In one embodiment of the present invention, the guide pulley assembly 300 includes two lower rope pulleys 310 and two first redirecting pulleys 320. The two lower rope pulleys 310 are vertically arranged and spaced apart along the length of the drum 200. The two first redirecting pulleys 320 are arranged one-to-one on opposite sides of the two lower rope pulleys 310.

[0036] In one embodiment of the present invention, the first redirecting pulley 320 is located above the other end of the lifting device assembly 100. The first redirecting pulley 320 is horizontally arranged, and the center plane of the rope groove of the first redirecting pulley 320 is at the same height as the bottom surface of the drum 200.

[0037] Figure 2 illustrates a side view of the wire rope winding device provided by the present invention, and Figure 3 illustrates a top view of the wire rope winding device provided by the present invention. Referring to Figures 2 and 3, two first redirecting pulleys 320 are spaced apart on one side of the drum 200 along the length direction of the drum 200. Both first redirecting pulleys 320 are horizontally arranged. When the first redirecting pulleys 320 are horizontally arranged, the central axis of the first redirecting pulleys 320 is vertically arranged, and the center plane of the rope groove of the first redirecting pulleys 320 is horizontally arranged.

[0038] It should be noted that the bottom surface of the drum 200 refers to the plane containing the lowest point of the bottom of the drum 200. The center plane of the rope groove refers to the pulley symmetry plane drawn along a direction perpendicular to the central axis of the pulley.

[0039] The first redirecting pulley 320 guides the rope 400 fed from the drum 200. Referring to Figure 3, the rope 400 output from the upper part of the drum 200 moves to the right, passes over the upper first redirecting pulley 320, and then moves to the left, entering the rope groove of the upper lower rope pulley 310. The rope 400 output from the lower part of the drum 200 moves to the right, passes over the lower first redirecting pulley 320, and then moves to the left, entering the rope groove of the lower lower rope pulley 310.

[0040] In one embodiment of the present invention, the height of the first redirecting pulley 320 near the drum 200 is less than the height of the first redirecting pulley 320 away from the drum 200, that is, the first redirecting pulley 320 is inclined to the left and downward. The center plane of the rope groove of the first redirecting pulley 320 forms an acute angle with the horizontal plane, and the height of the first redirecting pulley 320 is greater than the height of the bottom surface of the drum 200. The smaller the difference between the height of the first redirecting pulley 320 and the height of the bottom surface of the drum 200, the smaller the acute angle. Since the height of the first redirecting pulley 320 is greater than the height of the bottom surface of the drum 200, in order to ensure that the angle at which the rope 400 enters the first redirecting pulley 320 meets the design requirements, the first redirecting pulley 320 needs to be inclined to the left and downward.

[0041] In another embodiment of the invention, the height of the first redirecting pulley 320 near the drum 200 is greater than the height of the first redirecting pulley 320 away from the drum 200, that is, the first redirecting pulley 320 is tilted downwards to the right. The center plane of the rope groove of the first redirecting pulley 320 forms an acute angle with the horizontal plane, and the height of the first redirecting pulley 320 is greater than the height of the bottom surface of the drum 200. The smaller the difference between the height of the first redirecting pulley 320 and the height of the bottom surface of the drum 200, the smaller the acute angle. Since the height of the first redirecting pulley 320 is less than the height of the bottom surface of the drum 200, in order to ensure that the angle at which the rope 400 enters the first redirecting pulley 320 meets the design requirements, the first redirecting pulley 320 needs to be tilted downwards to the right.

[0042] In one embodiment of the invention, the center of the first redirecting pulley 320 is located on the side of the corresponding lower rope pulley 310 away from the drum 200.

[0043] In one embodiment of the present invention, the distances from the two first redirecting pulleys 320 to the drum 200 are equal, that is, the distances from the center points of the two first redirecting pulleys 320 to the central axis of the drum 200 are equal. Specifically, referring to Figure 3, the central axis of the drum 200 is a straight line L1, the center points of the two first redirecting pulleys 320 are both located on a straight line L2, and the distance between straight lines L1 and L2 is the length of line segment L3. The length of line segment L3 is the distance from the center point of the first redirecting pulley 320 to the central axis of the drum 200.

[0044] Referring again to Figure 3, the rope 400 is affected by the deflection angle α during its winding process on the drum 200. The deflection angle α determines the width of the rope 400 wound on the drum 200 (i.e., the length of line segment N1 in Figure 3), and thus determines the length of the rope 400 wound on the drum 200. The wire rope winding device of the present invention increases the length of line segment L3 by correspondingly arranging two first redirecting pulleys 320 on opposite sides of the two lower rope pulleys 310, and by making the distance from the first redirecting pulley 320 to the drum 200 greater than the distance from the corresponding lower rope pulley 310 to the drum 200. According to the properties of triangles, when the length of line segment L3 increases and the deflection angle α remains unchanged, the length of line segment N1 increases, which means the width of the rope 400 wound on the drum 200 increases. Therefore, when winding the same length of rope 400, a drum 200 with a smaller outer diameter, as well as a coupling and reducer of smaller size, can be used, which reduces the torque output requirement of the reducer, reduces the size of the drive device, and reduces the cost of use.

[0045] In one embodiment of the present invention, the distance between the two opposite sides of the first redirecting pulleys 320 is less than the length of the drum 200. Specifically, referring to Figure 3, the upper first redirecting pulley 320 has a tangent line L4 at its highest point A, and the lower first redirecting pulley 320 has a tangent line L5 at its lowest point B. Both the highest point A and the lowest point B are on the straight line L2. The distance between tangent line L4 and tangent line L5 is the length of line segment L6. Therefore, the length of line segment L6 is the distance between the opposite sides of the two first redirecting pulleys 320. By making the distance between the opposite sides of the two first redirecting pulleys 320 less than the length of the drum 200, the rope 400 can be prevented from winding around the end of the drum 200. Even if the end of the drum 200 is not provided with a limiting structure, the rope 400 will not fall off, thus improving the safety of the wire rope winding device.

[0046] In one embodiment of the present invention, the distances from the two lower rope pulleys 310 to the drum 200 are equal, that is, the distances from the center points of the two lower rope pulleys 310 to the central axis of the drum 200 are equal. Since the distances from the two first redirecting pulleys 320 to the drum 200 are equal, the positions of the first redirecting pulleys 320 need to correspond to the positions of the lower rope pulleys 310. Therefore, when the distances from the two first redirecting pulleys 320 to the drum 200 are equal, the distances from the two lower rope pulleys 310 to the drum 200 are also equal.

[0047] Specifically, referring to Figure 3, the length from the center point C of the upper lower rope pulley 310 to the straight line L1 is the length of line segment L7, and the length from the center point D of the lower lower rope pulley 310 to the straight line L1 is the length of line segment L8. Since the center point C and the center point D are on the same straight line, the length of line segment L7 is equal to the length of line segment L8, that is, the distances from the two lower rope pulleys 310 to the drum 200 are equal.

[0048] In one embodiment of the present invention, the two lower rope pulleys 310 are at the same height, and the top height of the rope groove of the lower rope pulley 310 is the same as the height of the rope groove of the corresponding first redirecting pulley 320. The highest point of the rope groove of the lower rope pulley 310 is at the same height as the rope groove of the first redirecting pulley 320, so that the rope 400 output from the first redirecting pulley 320 can smoothly enter the rope groove of the lower rope pulley 310.

[0049] In one embodiment of the present invention, the tangent at the top of the rope groove of the lower rope pulley 310 is tangent to the rope groove of the corresponding first redirecting pulley 320.

[0050] In one embodiment of the present invention, the distance between the sides of the two lower rope pulleys 310 closest to the drum 200 is less than the distance between the sides of the two lower rope pulleys 310 furthest from the drum 200, that is, the distance between the left sides of the two lower rope pulleys 310 is less than the distance between the right sides of the two lower rope pulleys 310. In other words, the two lower rope pulleys 310 are arranged in a V-shape with an acute angle between the center planes of their rope grooves. By making the distance between the left sides of the two lower rope pulleys 310 less than the distance between their right sides, the rope output direction of the first redirecting pulley 320 and the rope input direction of the lower rope pulley 310 can meet the design requirements, ensuring that the rope 400 output from the first redirecting pulley 320 can smoothly enter the rope groove of the lower rope pulley 310.

[0051] In one embodiment of the present invention, the outer diameters of the two lower rope pulleys 310 are equal, and the outer diameters of the two first redirecting pulleys 320 are equal. By making the outer diameters of the two lower rope pulleys 310 and the two first redirecting pulleys 320 equal, the movement speeds of the two ropes 400 can be made the same, ensuring the stability of the lifting device assembly 100 during movement.

[0052] In one embodiment of the present invention, referring to FIG1, the lifting device assembly 100 includes a lifting device body 101, four upper pulleys 102 and two pulley groups 110. The lifting device body 101 has a plate-like structure and is horizontally arranged. The four upper pulleys 102 are rotatably arranged on the upper part of the lifting device body 101. Two upper pulleys 102 are arranged on the upper part of one end of the lifting device body 101, and the two upper pulleys 102 located at one end of the lifting device body 101 are spaced apart along the width direction of the lifting device body 101. The remaining two upper pulleys 102 are arranged on the upper part of the other end of the lifting device body 101, and the two upper pulleys 102 located at the other end of the lifting device body 101 are spaced apart along the width direction of the lifting device body 101.

[0053] Of the two pulley blocks 110, one pulley block 110 is located above one end of the lifting device body 101, and the other pulley block 110 is located above the other end of the lifting device body 101. Specifically, referring to Figure 1, one pulley block 110 is located above the left end of the lifting device body 101, and the other pulley block 110 is located above the right end of the lifting device body 101.

[0054] The pulley block 110 includes a second redirecting pulley 111 and a third redirecting pulley 112. Both the second redirecting pulley 111 and the third redirecting pulley 112 are vertically arranged, with the second redirecting pulley 111 located above the third redirecting pulley 112. Both the second redirecting pulley 111 and the third redirecting pulley 112 are rotatably engaged with the trolley frame (not shown). The center plane of the rope groove of the second redirecting pulley 111 is parallel to the length direction of the lifting device body 101, and the center plane of the rope groove of the third redirecting pulley 112 is perpendicular to the length direction of the lifting device body 101. That is, the center plane of the rope groove of the second redirecting pulley 111 is perpendicular to the center plane of the rope groove of the third redirecting pulley 112.

[0055] Referring to Figure 1, the drum 200 outputs two ropes 400 in the horizontal direction and two ropes 400 downward. The horizontally output front rope 400 passes through the lower rope pulley 310 and then passes over the upper frame pulley 102 on the front right side of the lifting device body 101, and then passes over the third deflector 112 and the second deflector 111 located above the right end of the lifting device body 101 in sequence. The horizontally output rear rope 400 passes through the lower rope pulley 310 and then passes over the upper frame pulley 102 located on the rear right side of the lifting device body 101 and finally connects to the trolley frame. The downward-output front rope 400 passes over the upper pulley 102 located on the left front side of the lifting body 101, and then passes over the third deflector 112 and the second deflector 111 above the left end of the lifting body 101 before connecting to the horizontally output front rope 400; the downward-output rear rope 400 passes over the upper pulley 102 on the left rear side of the lifting body 101 before connecting to the trolley frame.

[0056] During the operation of the wire rope winding device, as shown in Figure 2, when the drum 200 rotates clockwise, the rope 400 is wound around the outer circumference of the drum 200. After passing through the lower rope pulley 310 and the first redirecting pulley 320, the rope 400 drives the lifting device assembly 100 to move upward. When the drum 200 rotates counterclockwise, the rope 400 is released from the outer circumference of the drum 200. After passing through the lower rope pulley 310 and the first redirecting pulley 320, the rope 400 drives the lifting device assembly 100 to move downward.

[0057] The wire rope winding device provided by the present invention, by setting two first redirecting pulleys 320 one-to-one on the opposite side of two lower rope pulleys 310, and making the distance from the first redirecting pulleys 320 to the drum 200 greater than the distance from the corresponding lower rope pulleys 310 to the drum 200, increases the width of the wire rope wound on the drum 200. When winding the same length of wire rope, a smaller diameter drum 200, as well as a smaller coupling and reducer, can be used, reducing the torque output requirements of the reducer, reducing the size of the drive device, and reducing the cost of use.

[0058] The present invention also provides a lifting device, which includes a driving device and a wire rope winding device as described in any of the above embodiments. The rotating shaft of the driving device is connected to the drum 200, and the driving device is used to drive the drum 200 to rotate.

[0059] It should be noted that the lifting equipment can be a gantry crane or other types of lifting equipment.

[0060] In one embodiment of the present invention, the lifting equipment further includes a trolley frame, a drive device is disposed on the trolley frame, one end of the drum 200 is rotatably engaged with the trolley frame via a mounting seat, and the other end of the drum 200 is connected to the rotating shaft of the drive device.

[0061] In one embodiment of the present invention, the driving device includes a drive motor, a reducer, and a coupling. The shaft of the drive motor is connected to the input shaft of the reducer, the output shaft of the reducer is connected to one end of the coupling, and the other end of the coupling is connected to the other end of the drum 200. During operation, the drive motor drives the input shaft of the reducer to rotate, and the output shaft of the reducer drives the drum 200 to rotate through the coupling, thereby realizing the winding and unwinding of the rope.

Claims

1. A wire rope winding device, characterized in that, include: Lifting gear assembly (100); A drum (200) is disposed above the lifting device assembly (100) and is used to wind the rope (400). A guide pulley assembly (300) is disposed above the lifting device assembly (100) and opposite to the drum (200); the guide pulley assembly (300) includes a lower rope pulley (310) and a first redirecting pulley (320); the distance from the first redirecting pulley (320) to the drum (200) is greater than the distance from the corresponding lower rope pulley (310) to the drum (200); the first ends of the two ropes (400) pass through the corresponding first redirecting pulley (320) and the lower rope pulley (310) in sequence and are then connected to the lifting device assembly (100).

2. The wire rope winding device according to claim 1, characterized in that, The guide pulley assembly (300) includes two lower rope pulleys (310) and two first redirecting pulleys (320). The two lower rope pulleys (310) are vertically arranged and spaced apart along the length of the drum (200). The two first redirecting pulleys (320) are arranged one-to-one on opposite sides of the two lower rope pulleys (310).

3. The wire rope winding device according to claim 1, characterized in that, The first redirecting pulley (320) is horizontally positioned, and the center plane of the rope groove of the first redirecting pulley (320) is at the same height as the bottom surface of the drum (200).

4. The wire rope winding device according to claim 1, characterized in that, The center plane of the rope groove of the first redirecting pulley (320) forms an acute angle with the horizontal plane; the height of the first redirecting pulley (320) near the drum (200) is less than the height of the first redirecting pulley (320) away from the drum (200), and the height of the first redirecting pulley (320) is greater than the height of the bottom surface of the drum (200); or, the height of the first redirecting pulley (320) near the drum (200) is greater than the height of the first redirecting pulley (320) away from the drum (200), and the height of the first redirecting pulley (320) is less than the height of the bottom surface of the drum (200).

5. The wire rope winding device according to claim 1, characterized in that, The center of the first redirecting pulley (320) is located on the side of the corresponding lower rope pulley (310) away from the drum (200).

6. The wire rope winding device according to claim 1, characterized in that, The two first redirecting pulleys (320) are equidistant from the drum (200).

7. The wire rope winding device according to any one of claims 1 to 6, characterized in that, The distance between the two first redirecting pulleys (320) on opposite sides is less than the length of the drum (200).

8. The wire rope winding device according to any one of claims 1 to 6, characterized in that, The two lower rope pulleys (310) are equidistant from the drum (200).

9. The wire rope winding device according to any one of claims 1 to 6, characterized in that, The two lower rope pulleys (310) are at the same height, and the height of the top of the rope groove of the lower rope pulley (310) is the same as the height of the rope groove of the corresponding first redirecting pulley (320).

10. The wire rope winding device according to any one of claims 1 to 6, characterized in that, The tangent at the top of the groove of the lower rope pulley (310) is tangent to the groove of the corresponding first redirecting pulley (320).

11. The wire rope winding device according to any one of claims 1 to 6, characterized in that, The distance between the two lower rope pulleys (310) on the side closer to the drum (200) is less than the distance between the two lower rope pulleys (310) on the side farther away from the drum (200), and the center planes of the rope grooves of the two lower rope pulleys (310) form an acute angle.

12. The wire rope winding device according to any one of claims 1 to 6, characterized in that, The outer diameters of the two lower rope pulleys (310) are equal, and the outer diameters of the two first redirecting pulleys (320) are equal.

13. A lifting device, characterized in that, The device includes a drive unit and a wire rope winding device according to any one of claims 1 to 12, wherein the drive unit's shaft is connected to the drum (200), and the drive unit is used to drive the drum (200) to rotate.

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