Steel wire rope end hooking device, hoisting system, and crane

Abstract

A steel wire rope end hooking device (7), a hoisting system, and a crane. The steel wire rope end hooking device (7) comprises a hooking portion (71) and a connecting portion (72). The hooking portion (71) is configured to be hooked to a boom pulley block (4) or a hook pulley block (5). The connecting portion (72) is rotatably connected to the hooking portion (71), and the connecting portion (72) is configured to be rotatably connected to a steel wire rope (2).

Description

Wire rope end splicing device, hoisting system and crane

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to CN application No. 202411731728.1, filed on November 28, 2024, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to the field of engineering machinery, specifically to a wire rope end splicing device, a hoisting system, and a crane. Background Technology

[0004] Taking a crawler crane as an example, the crane's lifting system includes a hoisting winch (hereinafter referred to as the winch), a hoisting wire rope (hereinafter referred to as the wire rope), guide pulleys, a boom pulley block, a hook pulley block, and a hook. The winch is wound with the wire rope, which passes through the guide pulleys and is wound between the boom pulley block and the hook pulley block in a predetermined winding pattern. The hook below the hook pulley block can bear heavy loads. By rotating the winch to wind up and unwind the wire rope, the distance between the boom pulley block and the hook is changed, thus achieving the lifting and lowering of heavy loads.

[0005] The hoisting system's multiplier determines the wire rope winding method. When the hoisting system multiplier is even, the wire rope exits from the winch, passes through the guide pulley, the boom pulley block, and the hook, and finally the rope end is fixed at point B1 on the boom head structure, or at point B2 on the boom head pulley block. Figure 1 illustrates the winding method where the wire rope is fixed at point B1 on the boom head structure when the multiplier is 2. Figure 2 illustrates the winding method where the wire rope is fixed at point B2 on the boom head pulley block when the hoisting system multiplier is 2. When the hoisting system multiplier is odd, the wire rope exits from the winch, passes through the guide pulley, the boom pulley block, and the hook, and finally the rope end is hooked at point G1 on the hook. Figure 3 illustrates the winding method where the wire rope is fixed at point G1 on the hook when the hoisting system multiplier is 3. In Figures 1 to 3, θ is the rope entry angle of the pulley. Summary of the Invention

[0006] The inventors have discovered that the related technology has at least the following shortcomings: In the related technology, when the lifting ratio is small, the angle of entry of the wire rope when it enters the pulley is greater than the standard requirement. When the pulley and the wire rope are running, the excessive angle of entry will result in a large sliding friction force when the wire rope enters and exits the pulley. This friction force makes the wire rope easy to twist, causing the wire rope to become kinked or loose, reducing the life of the wire rope, and causing great damage to the wire rope.

[0007] This disclosure proposes a wire rope end splicing device, a hoisting system, and a crane to reduce the entry angle of the wire rope when it enters the pulley.

[0008] This disclosure provides a wire rope end splicing device in some embodiments, including:

[0009] The coupling is configured to engage with the boom pulley block or hook pulley block; and

[0010] A connecting part is rotatably connected to the hook part; the connecting part is configured to be rotatably connected to the wire rope.

[0011] In some embodiments, the attachment part is a hanging rope, both ends of which are rotatably connected to the connecting part. The hanging rope and the connecting part form an attachment hole, the size of which, D1, is equal to the bottom diameter D0 of the pulley groove of the boom pulley assembly, and the size of which, D1, is equal to the bottom diameter D0 of the pulley groove of the hook pulley assembly; the diameter d1 of the hanging rope is equal to the diameter d2 of the lifting wire rope.

[0012] In some embodiments, the wire rope end splicing device further includes:

[0013] The first connecting clamp includes a first through hole, a first groove, and a first connecting hole, wherein the central axis of the first through hole is perpendicular to the central axis of the first connecting hole; one end of the hanging rope extends into the first through hole; the first groove communicates with both the first through hole and the first connecting hole; the connecting part is inserted into the first groove and is rotatably connected to the first connecting clamp through the first connecting hole;

[0014] The second connecting clamp includes a second through hole, a second groove, and a second connecting hole, wherein the central axis of the second through hole is perpendicular to the central axis of the second connecting hole; the other end of the hanging rope extends into the second through hole; the second groove communicates with both the second through hole and the second connecting hole; the connecting part is engaged in the second groove and rotatably connected to the second connecting clamp through the second connecting hole; and

[0015] The third connecting clamp includes a third through hole, a third groove, and a third connecting hole. The central axis of the third through hole is perpendicular to the central axis of the third connecting hole. The steel wire rope extends into the third through hole. The third groove is connected to both the third through hole and the third connecting hole. The connecting part is inserted into the third groove and is rotatably connected to the third connecting clamp.

[0016] In some embodiments, the connecting portion includes a first corner, a second corner, and a third corner; the first corner is inserted into the first groove and rotatably connected to the first connecting clamp; the second corner is inserted into the second groove and rotatably connected to the second connecting clamp; the third corner is provided with a mounting hole for rotatably connecting to the wire rope through the third connecting clamp.

[0017] Some embodiments of this disclosure also provide a lifting system, including:

[0018] The winch is configured to provide power;

[0019] A wire rope, one end of which is wound around the winch;

[0020] Guide pulleys are arranged at intervals from the winch;

[0021] The boom pulley block is arranged at intervals from the guide pulley;

[0022] The hook pulley block is arranged at intervals from the boom pulley block and is positioned lower than the boom pulley block;

[0023] A hook, connected below the hook pulley block; and

[0024] The wire rope end splicing device provided in any of the technical solutions of this disclosure is provided in which the other end of the wire rope is connected to the wire rope end splicing device; the wire rope end splicing device can be selectively spliced ​​to one of the pulleys of the boom pulley group, or the wire rope end splicing device can be selectively spliced ​​to one of the pulleys of the hook pulley group.

[0025] The other end of the wire rope is wound around the guide pulley and the boom pulley group.

[0026] In some embodiments, the attachment position of the wire rope end splicing device is configured to satisfy the following condition: the entry angle of the wire rope is less than a set value.

[0027] In some embodiments, the setting value is 0° to 2°.

[0028] In some embodiments, the wire rope end splicing device may be selectively spliced ​​to one of the pulleys of the boom pulley block, and the entry angle of the wire rope is less than 2°.

[0029] In some embodiments, the wire rope end splicing device may be selectively spliced ​​to one of the pulleys of the hook pulley block, and the entry angle of the wire rope is less than 2°.

[0030] Some embodiments of this disclosure also provide a crane, including the wire rope end splicing device provided by any of the technical solutions of this disclosure.

[0031] In some embodiments, the crane is a crawler crane.

[0032] The wire rope end splicing device provided by the above technical solution is installed at the end of the wire rope in the hoisting system furthest from the winch. The device can be attached at any desired position. Since the direction in which the wire rope enters the hook pulley block is fixed, while the direction out of the pulley block is adjustable, the angle of entry of the wire rope can be sufficiently small. This reduces the probability of twisting during operation, increases the lifespan of the wire rope, and minimizes damage. Therefore, by arranging the wire rope end splicing device in a reasonable position, the above technical solution ensures that the distance between adjacent wire ropes is close during winding, making the wire rope entry angle at the pulley meet requirements. This reduces the probability of kinking or loosening of the winch wire rope, thereby increasing its lifespan and reducing the likelihood of damage. Attached Figure Description

[0033] Figure 1 shows the rope winding method of fixing the wire rope to point B1 on the boom head structure when the lifting system of a crane is at 2 times the rated lifting capacity.

[0034] Figure 2 shows the rope winding method of fixing the wire rope to point B2 of the boom pulley block when the lifting system of the crane is at 2 times the rated lifting capacity.

[0035] Figure 3 shows the rope winding method of fixing the wire rope to point G1 of the hook when the lifting system of the crane is at a 3x ratio in the related technology.

[0036] Figure 4a is a front view schematic diagram of a wire rope end splicing device provided in some embodiments of this disclosure.

[0037] Figure 4b is a side view of a wire rope end splicing device provided in some embodiments of this disclosure.

[0038] Figure 5a is a front view schematic diagram of the wire rope end splicing device in the hoisting system provided in some embodiments of this disclosure being spliced ​​to the boom pulley block.

[0039] Figure 5b is a side view of the wire rope end splicing device in the hoisting system provided in some embodiments of this disclosure, which is attached to the boom pulley block.

[0040] Figure 5c is a magnified view of part A in Figure 5b.

[0041] Figure 6a is a front view schematic diagram of the wire rope end splicing device in the hoisting system provided in some embodiments of this disclosure being spliced ​​to the hook pulley block.

[0042] Figure 6b is a side view of the wire rope end splicing device in the hoisting system provided in some embodiments of this disclosure, which is attached to the hook pulley block.

[0043] Figure 6c is a magnified view of part B in Figure 6b.

[0044] Figure 7 is a schematic diagram of the bottom diameter D0 of the pulley groove of the hook pulley block and the boom pulley block of the lifting system provided in some embodiments of this disclosure.

[0045] Reference numerals: 1. Hoist; 2. Wire rope; 3. Guide pulley; 4. Boom pulley block; 5. Hook pulley block; 6. Hook; 7. Wire rope end splicing device; 71. Splicing part; 72. Connecting part; 73. First connecting clamp; 74. Second connecting clamp; 75. Third connecting clamp; 70. Splicing hole; 721. First corner; 722. Second corner; 723. Third corner; 723a. Mounting hole; 731. First through hole; 732. First groove; 733. First connecting hole; 73a. Side plate; 73b. Connecting plate; 741. Second through hole; 743. Second connecting hole; 742. Second groove; 751. Third through hole; 752. Third groove; 753. Third connecting hole.

[0046] The detailed embodiments are described below with reference to Figures 4a to 7. The descriptions of exemplary embodiments are merely illustrative and are in no way intended to limit the scope of this disclosure or its application or use. This disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of this disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0047] The terms “first,” “second,” and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as “including” or “contains” mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0048] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0049] In the description of this disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 disclosure 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 on the scope of protection of this disclosure.

[0050] All terms used in this disclosure, including technical or scientific terms, have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0051] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment shall be considered part of the specification.

[0052] The dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Common structural elements or elements of the same kind are given the same reference numerals in the various drawings, and repeated descriptions of them are omitted where appropriate.

[0053] Explanation of the nouns or terms used in this article.

[0054] Crane: A machine used to lift and move heavy objects.

[0055] Boom: The component on a crane located between the main unit and the hook, used to support and carry heavy objects.

[0056] Winch (lifting winch): A mechanism on a crane used to wind a wire rope and provide tension to the hook through the wire rope.

[0057] Hook: A device on a crane used to hook and lift heavy objects.

[0058] Hook head: The part on a hook used to hook heavy objects.

[0059] Pulley block: A device on a crane consisting of one or more pulleys, used to achieve a larger total pulling force with a smaller single rope tension. Pulley blocks include boom pulley blocks and hook pulley blocks.

[0060] Ratio: The number of lifting wire ropes wound between the boom pulley block and the hook pulley block.

[0061] Pulley entry angle: The angle between the direction in which the wire rope enters the pulley and the section perpendicular to the pulley's axis.

[0062] Figure 4a is a front view of a wire rope end splicing device provided in some embodiments of this disclosure. Figure 4b is a side view of a wire rope end splicing device provided in some embodiments of this disclosure.

[0063] Referring to Figures 4a and 4b, some embodiments of this disclosure provide a wire rope end splicing device 7 suitable for a crane's hoisting system. The wire rope end splicing device 7 includes a splicing portion 71 and a connecting portion 72. The splicing portion 71 is configured to splice with a boom pulley block 4 or a hook pulley block 5. The connecting portion 72 is rotatably connected to the splicing portion 71; the connecting portion 72 is configured to be rotatably connected to the wire rope 2.

[0064] The structure of the attachment part 71 satisfies the requirement that it can be attached to both the boom pulley block 4 and the hook pulley block 5. The attachment part 71 is not attached to both the boom pulley block 4 and the hook pulley block 5 at the same time, but can be selectively attached to one of the boom pulley block 4 and the hook pulley block 5.

[0065] The attachment part 71 can be implemented in various ways, such as using a plate or a ring. In some embodiments, the attachment part 71 is a hanging rope, specifically a metal rope. The loop formed by bending the hanging rope in this structure has a certain degree of flexibility, can deform, will not damage the pulley, and has excellent load-bearing capacity. Both ends of the hanging rope are rotatably connected to the connecting part 72. The hanging rope and the connecting part 72 form the attachment hole 70, as shown in Figures 4a and 7. The size D1 of the attachment hole 70 is equal to the bottom diameter D0 of the pulley groove of the boom pulley group 4, and the size D1 of the attachment hole 70 is also equal to the bottom diameter D0 of the pulley groove of the hook pulley group 5. The bottom diameter D0 of the pulley groove of the hook pulley group 5 and the bottom diameter D0 of the pulley groove of the boom pulley group 4 are equal. Referring to Figure 4a, the diameter d1 of the hanging rope is equal to the diameter d2 of the lifting wire rope. The rope end splicing device can rotate around the central axis of the pulley to adapt to different boom elevation angles, so that the direction of the splicing device is consistent with the direction of the tension of the wire rope 2. The rope end splicing device will not generate bending moment, and the force is more reasonable.

[0066] The connecting part 72 is used to connect the wire rope 2 and the hook-on part 71. The connecting part 72 can adopt various structures to achieve the connection between the wire rope 2 and the hook-on part 71. For example, the connecting part 72 can be a plate or a rope.

[0067] Referring to Figures 4a and 4b, in some embodiments, the wire rope end splicing device 7 further includes a first connecting plate 73, a second connecting plate 74, and a third connecting plate 75. The first connecting plate 73 connects one end of the rope to the connecting portion 72. The second connecting plate 74 connects the other end of the rope to the connecting portion 72. The third connecting plate 75 connects the lifting wire rope 2 to the connecting portion 72.

[0068] The connecting part 72 is, for example, a flat plate, which is roughly triangular, with two corners rotatably connected to the hanging rope and the other corner connected to the lifting wire rope 2. Specifically, in some embodiments, the connecting part 72 includes a first corner 721, a second corner 722, and a third corner 723; the first corner 721 is inserted into a first groove 732 and rotatably connected to a first connecting clamp 73; the second corner 722 is inserted into a second groove and rotatably connected to a second connecting clamp 74; the third corner 723 is provided with a mounting hole 723a to be rotatably connected to the wire rope 2 through a third connecting clamp 75.

[0069] The structures of the first connecting plate 73, the second connecting plate 74, and the third connecting plate 75 are basically the same.

[0070] Referring to Figures 4a and 4b, the first connecting clamp 73 includes a first through hole 731, a first groove 732, and a first connecting hole 733. The central axis of the first through hole 731 is perpendicular to the central axis of the first connecting hole 733; one end of the hanging rope extends into the first through hole 731; the first groove 732 communicates with both the first through hole 731 and the first connecting hole 733; the connecting part 72 is inserted into the first groove 732 and is rotatably connected to the first connecting clamp 73 through the first connecting hole 733. The first connecting clamp 73 includes two parallel side plates 73a and a connecting plate 73b disposed between the two side plates 73a. The connecting plate 73b is provided with the first through hole 731. One end of the hanging rope passes through the first through hole 731, and this end of the hanging rope is knotted or provided with a blocking element to prevent the hanging rope from detaching from the first through hole 731. The gap between the two side plates 73a serves as the first groove 732. The first corner of the connecting part 72 is inserted into the first groove 732. Each of the two side plates 73a is provided with a first connecting hole 733, and the central axes of the two first connecting holes 733 coincide. The first corner of the connecting part 72 is provided with a connecting pin hole 72a. The first connecting plate 73 and the first corner of the connecting part 72 are rotatably connected by a pin a passing through the first connecting holes 733 of the two side plates 73a and the connecting pin hole 72a at the first corner of the connecting part 72.

[0071] The second connecting clamp 74 is used to connect the other end of the hanging rope to the second corner of the connecting part 72. The structure of the second connecting clamp 74 is the same as that of the first connecting clamp 73. Specifically, the second connecting clamp 74 includes a second through hole 741, a second groove 742, and a second connecting hole 743. The central axis of the second through hole 741 is perpendicular to the central axis of the second connecting hole 743. The other end of the hanging rope extends into the second through hole 741, and the other end of the hanging rope is knotted or provided with a blocking element to prevent the hanging rope from falling out of the second through hole 741. The second groove 742 communicates with both the second through hole 741 and the second connecting hole 743; the connecting part 72 is inserted into the second groove 742 and is rotatably connected to the second connecting clamp 74 through the second connecting hole 743. It should be noted that in Figure 4b, the second groove 742 coincides with the first groove 732, and the second groove 742 is located on the side of the first groove 732 closer to the paper surface, i.e., the inner side.

[0072] The third connecting plate 75 is used to connect the lifting wire rope 2 to the third corner of the connecting part 72. The structure of the third connecting plate 75 is basically the same as that of the second connecting plate 74 and the first connecting plate 73. Specifically, the third connecting plate 75 includes a third through hole 751, a third groove 752, and a third connecting hole 753. The central axis of the third through hole 751 is perpendicular to the central axis of the third connecting hole 753. The wire rope 2 extends into the third through hole 751, and the end of the wire rope 2 is knotted or equipped with a blocking element to prevent the wire rope 2 from falling out of the third through hole 751. The third groove 752 is connected to both the third through hole 751 and the third connecting hole 753. The connecting part 72 is inserted into the third groove 752 and is rotatably connected to the third connecting plate 75.

[0073] Referring again to Figure 4a, the hook-on part 71 and the first connecting clamp 73 are detachably connected, and there are various ways to make this detachable connection. The hook-on part 71 and the second connecting clamp 74 are also detachably connected; the specific method of detachable connection is not limited here. The first connecting clamp 73 and the connecting part 72 are detachably connected, and the second connecting clamp 74 and the connecting part 72 are also detachably connected. With the above components using detachable connections, the wire rope end hook-on device 7 can be easily installed on the boom pulley block 4 and the hook pulley block 5; the wire rope end hook-on device 7 can also be easily detached from the boom pulley block 4 and the hook pulley block 5.

[0074] Figure 5a is a front view schematic diagram of the wire rope end splicing device in a hoisting system provided in some embodiments of the present disclosure, attached to the boom pulley block. Figure 5b is a side view schematic diagram of the wire rope end splicing device in a hoisting system provided in some embodiments of the present disclosure, attached to the boom pulley block. Figure 5c is a partial enlarged schematic diagram of A in Figure 5b. Figure 6a is a front view schematic diagram of the wire rope end splicing device in a hoisting system provided in some embodiments of the present disclosure, attached to the hook pulley block.

[0075] Figure 6b is a side view of the wire rope end splicing device in the hoisting system provided in some embodiments of this disclosure, which is attached to the hook pulley block. Figure 6c is a partial enlarged view of B in Figure 6b.

[0076] Referring to Figures 5a to 6c, some embodiments of this disclosure also provide a hoisting system, including a winch 1, a wire rope 2, a guide pulley 3, a boom pulley block 4, a hook 6, and a wire rope end coupling device 7 provided by any of the technical solutions of this disclosure. The winch 1 provides power. One end of the wire rope 2 is wound around the winch 1. The guide pulley 3 is spaced apart from the winch 1. The boom pulley block 4 is spaced apart from the guide pulley 3. The hook pulley block 5 is spaced apart from the boom pulley block 4, and the position of the hook pulley block 5 is lower than the position of the boom pulley block 4. The hook 6 is connected below the hook pulley block 5. The other end of the wire rope 2 is connected to the wire rope end coupling device 7. Specifically, the other end of the wire rope 2 is wound around the guide pulley 3 and the boom pulley block 4 before being connected to the wire rope end coupling device 7.

[0077] The other end of the wire rope 2 is used to connect to the wire rope end splice 7. The number of wire rope end splices 7 corresponds to the number of rope ends in the hoisting system. The number of rope ends is the same as the number of wire rope end splices 7. The wire rope end splice 7 can be selectively spliced ​​onto one of the pulleys in the boom pulley block 4, as shown in Figures 5a to 5c. When the wire rope end splice 7 is fixed to the boom pulley block, it is installed on one of the pulleys. Because the wire rope end splice 7 is a movable installation structure, it can be installed on any pulley, allowing the wire rope 2 to maintain a smaller spacing during winding, such as twice the spacing shown in Figures 5a to 5c, so that the pulley entry angle θ is less than the maximum angle required by the standard, thereby improving the reliability of the wire rope 2.

[0078] Alternatively, the wire rope end splicing device 7 can be selectively spliced ​​onto one of the pulleys of the hook pulley block 5, as shown in Figures 6a to 6c. When the wire rope end splicing device 7 is fixed to the hook pulley block 5, the wire rope end splicing device 7 is installed on the hook pulley block 5. Because the wire rope end splicing device 7 is a movable installation structure, it can be installed on any pulley of the hook pulley block 5, which allows the wire rope 2 to maintain a smaller spacing when winding, for example, a ratio of 3 as shown in Figures 6a to 6c, so that the pulley rope entry angle θ is less than the maximum angle required by the standard, thereby improving the reliability of the wire rope 2 in operation.

[0079] In the hoisting system, after the lifting ratio is determined, the wire rope end splice 7 is either attached to one of the pulleys in the boom pulley block 4 or one of the pulleys in the hook pulley block 5. Regardless of which pulley it is attached to, the attachment position of the wire rope end splice 7 is configured to satisfy the following condition: the entry angle of the wire rope 2 is less than a set value. Specifically, the set value is 0° to 2°.

[0080] After the winding method of the wire rope 2 is determined, if the final entry angle of the wire rope 2 does not meet the requirements, the attachment position of the wire rope head attachment device 7 can be changed at any time to make the entry angle of the wire rope 2 meet the requirements.

[0081] Referring to Figures 5a to 5c, in some embodiments, the wire rope end splicing device 7 can be selectively spliced ​​to one of the pulleys of the boom pulley block 4, and the angle of entry of the wire rope 2 is less than 2°. This arrangement of the wire rope end splicing device 7 also makes the angle of entry of the wire rope very small.

[0082] Referring to Figures 6a to 6c, in some embodiments, the wire rope end splicing device 7 can be selectively spliced ​​to one of the pulleys of the hook pulley block 5, and the angle of entry of the wire rope 2 is less than 2°. This arrangement of the wire rope end splicing device 7 also makes the angle of entry of the wire rope very small.

[0083] Some embodiments of this disclosure also provide a crane, including the wire rope end splicing device 7 provided by any of the technical solutions of this disclosure. Regardless of the lifting ratio of the crane, whether the ratio is large or small, the splicing position of the wire rope end splicing device 7 can be flexibly set so that the entry angle of the wire rope 2 is sufficiently small.

[0084] In some embodiments, the crane is a crawler crane or other type of crane.

[0085] The crawler crane's lifting system is equipped with high-strength steel wire rope 2 and a high-efficiency drum. The lifting height of the system can meet the needs of large-scale engineering construction, reaching heights of tens, hundreds, or even thousands of meters. The lifting speed can also be flexibly adjusted, achieved through precise control of the winch 1's rotation speed. In actual lifting operations, operators can select the appropriate lifting speed based on the weight and shape of the object being lifted, as well as the lifting conditions. For example, when lifting lighter objects requiring faster positioning, the lifting speed can be increased to accelerate the lifting process; while when lifting heavy or precision equipment, the lifting speed can be reduced to ensure safety and accuracy. Furthermore, the crawler crane offers excellent lifting stability. Its wide chassis and low center of gravity provide a solid foundation for stability. During lifting, when the load is lifted, the crane's tracks effectively resist overturning moments caused by the load's center of gravity shifting or the lifting force. Meanwhile, the hoisting system can precisely control the lifting and lowering of heavy objects, preventing sudden drops and further enhancing hoisting stability. This stability enables crawler cranes to reliably position large, high-precision equipment, thereby improving the stability of the hoisting operation.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A wire rope end splicing device, comprising: The attachment part (71) is configured to be attached to the boom pulley block (4) or the hook pulley block (5); as well as The connecting part (72) is rotatably connected to the hook part (71); the connecting part (72) is configured to be rotatably connected to the wire rope (2).

2. The wire rope end splicing device according to claim 1, wherein the splicing part (71) is a hanging rope, both ends of the hanging rope are rotatably connected to the connecting part (72), the hanging rope and the connecting part (72) form a splicing hole (70), the size of the splicing hole (70) is equal to the bottom diameter D0 of the pulley groove of the boom pulley group (4), and the size of the splicing hole (70) is also equal to the bottom diameter D0 of the pulley groove of the hook pulley group (5).

3. The wire rope end splicing device according to claim 2 further includes: The first connecting clamp (73) includes a first through hole (731), a first groove (732), and a first connecting hole (733). The central axis of the first through hole (731) is perpendicular to the central axis of the first connecting hole (733). One end of the hanging rope extends into the first through hole (731). The first groove (732) is connected to both the first through hole (731) and the first connecting hole (733). The connecting part (72) is inserted into the first groove (732) and is rotatably connected to the first connecting clamp (73) through the first connecting hole (733). The second connecting clamp (74) includes a second through hole (741), a second groove (742), and a second connecting hole (743). The central axis of the second through hole (741) is perpendicular to the central axis of the second connecting hole (743). The other end of the hanging rope extends into the second through hole (741). The second groove (742) is connected to both the second through hole (741) and the second connecting hole (743). The connecting part (72) is inserted into the second groove (742) and is rotatably connected to the second connecting clamp (74) through the second connecting hole (743). as well as The third connecting clamp (75) includes a third through hole (751), a third groove (752), and a third connecting hole (753). The central axis of the third through hole (751) is perpendicular to the central axis of the third connecting hole (753). The steel wire rope (2) extends into the third through hole (751). The third groove (752) is connected to both the third through hole (751) and the third connecting hole (753). The connecting part (72) is inserted into the third groove (752) and is rotatably connected to the third connecting clamp (75).

4. The wire rope end splicing device according to claim 3, wherein the connecting part (72) includes a first corner (721), a second corner (722) and a third corner (723); the first corner (721) is inserted into the first groove (732) and rotatably connected to the first connecting clamp (73); the second corner (722) is inserted into the second groove (742) and rotatably connected to the second connecting clamp (74); the third corner (723) is provided with a mounting hole (723a) to be rotatably connected to the wire rope (2) through the third connecting clamp (75).

5. A hoisting system, comprising: The winch (1) is configured to provide power; A wire rope (2), one end of which is wound around the winch (1); Guide pulleys (3) are arranged at intervals from the winch (1); The boom pulley block (4) is arranged at intervals from the guide pulley (3); The hook pulley block (5) is arranged at an interval from the boom pulley block (4) and is positioned lower than the boom pulley block (4); A hook (6) is connected below the hook pulley block (5); as well as The wire rope end splicing device (7) according to any one of claims 1 to 4, wherein the other end of the wire rope (2) is connected to the wire rope end splicing device (7); the wire rope end splicing device (7) may be selectively spliced ​​to one of the pulleys of the boom pulley group (4), or the wire rope end splicing device (7) may be selectively spliced ​​to one of the pulleys of the hook pulley group (5); The other end of the wire rope (2) is wound around the guide pulley (3) and the boom pulley block (4).

6. The hoisting system according to claim 5, wherein the attachment position of the wire rope end attachment device (7) is configured to satisfy the following condition: the entry angle of the wire rope (2) is less than a set value.

7. The lifting system according to claim 6, wherein the set value is 0° to 2°.

8. The hoisting system according to claim 5 or 6, wherein the wire rope end splicing device (7) can be selectively spliced ​​to one of the pulleys of the boom pulley block (4), and the entry angle of the wire rope (2) is less than 2°.

9. The lifting system according to any one of claims 5 to 8, wherein the wire rope end splicing device (7) can be selectively spliced ​​to one of the pulleys of the hook pulley block (5), and the entry angle of the wire rope (2) is less than 2°.

10. A crane comprising the wire rope end splicing device (7) as described in any one of claims 1 to 4.

11. The crane according to claim 10, wherein the crane is a crawler crane.

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