Steel wire rope head hooking device, lifting system and crane

Abstract

The invention discloses a steel wire rope head hooking device, a lifting system and a crane, relates to the field of engineering machinery, and aims to reduce a rope entering angle when a steel wire rope is wound into a pulley. The steel wire rope head hooking device comprises a hooking part and a connecting part. And the hooking part is configured to be hooked with a suspension arm pulley block or a hook pulley block. The connecting part is rotatably connected with the hanging part; the connecting part is configured to be rotatably connected with the steel wire rope. According to the technical scheme, the steel wire rope head hooking device is installed at the end, away from a winch, of the steel wire rope of a lifting system, the steel wire rope head hooking device can be hooked to any needed position, the direction of the steel wire rope winding into a hook pulley block is determined, and the direction of the steel wire rope winding out of the hook pulley block can be adjusted, so that the steel wire rope can be hooked to any needed position. Therefore, the rope inlet angle of the steel wire rope can be small enough, the probability that the steel wire rope is twisted in the working process is reduced, the service life of the steel wire rope is prolonged, and damage to the steel wire rope is small.

Description

Technical Field

[0001] The invention relates to the field of engineering machinery, and in particular to a wire rope end hanging device, a lifting system and a crane. Background Art

[0002] Taking crawler crane as an example, the hoisting system of the crane includes winch, wire rope, guide pulley, boom pulley block, hook pulley block and hook. The winch is wound with wire rope, which passes through the guide pulley and is wound between the boom pulley block and the hook pulley block in a set winding method. The hook under the hook pulley block can load heavy objects. By rotating the winch to retract and release the wire rope, the distance between the boom pulley block and the hook is changed to achieve the action of lifting and lowering the heavy object.

[0003] The ratio of the hoisting system determines the winding method of the wire rope. When the ratio of the hoisting system is an even number, the wire rope is wound out from the winch, passes through the guide pulley, the boom pulley block and the hook, and finally the rope end of the wire rope is fixed to B1 on the boom head structure, or fixed to B2 on the boom head pulley block. Figure 1 The diagram shows the rope winding method when the wire rope is fixed to B1 on the boom head structure at 2 times the rate. Figure 2 The diagram shows the rope winding method when the lifting system is 2 times the ratio, with the wire rope fixed at B2 of the boom pulley block. When the lifting system ratio is an odd number, the wire rope is wound out from the winch, passes through the guide pulley, the boom pulley block and the hook, and finally the rope end of the wire rope is hung at G1 of the hook. Figure 3 The diagram shows the rope winding method when the lifting system is 3 times the power and the wire rope is fixed to the G1 of the hook. Figures 1 to 3 In the equation, θ is the rope entry angle of the pulley.

[0004] The inventors have discovered that there are at least the following problems in the prior art: In the prior art, when the lifting ratio is small, the rope entry angle when the wire rope is wound around the pulley will be greater than the standard requirement. When the pulley and the wire rope are in operation, the excessively large rope entry angle will cause 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 tangled or loose, reducing the life of the wire rope and causing great damage to the wire rope. Summary of the invention

[0005] The invention provides a wire rope end hanging device, a lifting system and a crane, which are used to reduce the rope entry angle when the wire rope is wound into a pulley.

[0006] The embodiment of the present invention provides a wire rope end hanging device, comprising:

[0007] A hooking portion configured to be hooked to a boom pulley block or a hook pulley block; and

[0008] The connecting part is rotatably connected to the hanging part; the connecting part is constructed to be rotatably connected to the wire rope.

[0009] In some embodiments, the hanging part is a hanging rope, both ends of the hanging rope are rotatably connected to the connecting part, the hanging rope and the connecting part form a hanging hole, the size D1 of the hanging hole is equal to the bottom diameter D0 of the pulley groove of the boom pulley block, and the size D1 of the hanging hole is equal to the bottom diameter D0 of the pulley groove of the hook pulley block; the diameter d1 of the hanging rope is equal to the diameter d2 of the lifting wire rope.

[0010] In some embodiments, the wire rope end hooking device further comprises:

[0011] The first connecting clamping plate comprises 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 is connected to both the first through hole and the first connecting hole; the connecting portion is inserted into the first groove and is rotatably connected to the first connecting clamping plate through the first connecting hole;

[0012] A second connecting clamping plate comprises 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 is connected to both the second through hole and the second connecting hole; the connecting portion is inserted into the second groove and is rotatably connected to the second connecting clamping plate through the second connecting hole; and

[0013] The third connecting clamping plate comprises a third through hole, a third groove and a third connecting hole, wherein 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 clamping plate.

[0014] 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 is rotatably connected to the first connecting clamp; the second corner is inserted into the second groove and is rotatably connected to the second connecting clamp; the third corner is provided with the third hole to be rotatably connected to the wire rope.

[0015] The embodiment of the present invention further provides a lifting system, comprising:

[0016] A winch, constructed to provide power;

[0017] A steel wire rope, one end of which is wound around the winch;

[0018] A guide pulley is arranged at an interval from the winch;

[0019] A boom pulley block is arranged at intervals from the guide pulley;

[0020] A hook pulley block is arranged at a distance from the boom pulley block and is located lower than the boom pulley block;

[0021] A hook connected below the hook pulley block; and

[0022] The wire rope end hooking device provided by any technical solution of the present invention, the other end of the wire rope is connected to the wire rope end hooking device; the wire rope end hooking device can be selectively hooked to one of the pulleys of the boom pulley block, or the wire rope end hooking device can be selectively hooked to one of the pulleys of the hook pulley block;

[0023] Wherein, the other end of the steel wire rope is wound around the guide pulley and the boom pulley block.

[0024] In some embodiments, the hooking position of the wire rope end hooking device is constructed to meet the following condition: the entry angle of the wire rope is less than a set value.

[0025] In some embodiments, the set value is 0° to 2°.

[0026] In some embodiments, the wire rope end hooking device can be selectively hooked to one of the pulleys of the boom pulley block, and the entry angle of the wire rope is less than 2°.

[0027] In some embodiments, the wire rope end hanging device can be selectively hung on one of the pulleys of the hook pulley block, and the entry angle of the wire rope is less than 2°.

[0028] An embodiment of the present invention further provides a crane, comprising a wire rope end hanging device provided by any technical solution of the present invention.

[0029] In some embodiments, the crane is a crawler crane.

[0030] The wire rope end hooking device provided by the above technical solution is installed at the end of the wire rope of the lifting system away from the winch. The wire rope end hooking device can be hung at any desired position. Since the direction of the wire rope winding into the hook pulley block is fixed, and the direction of the wire rope winding out of the hook pulley block can be adjusted, the wire rope entry angle can be small enough to reduce the probability of the wire rope twisting during operation, improve the life of the wire rope, and cause less damage to the wire rope. It can be seen that the above technical solution arranges the wire rope end hooking device in a reasonable position, so that the distance between adjacent wire ropes is close when the wire rope is wound, ensures that the pulley wire rope entry angle meets the requirements, reduces the probability of kinking or loosening of the winch wire rope, thereby improving the life of the wire rope and reducing the probability of the wire rope being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 This is the rope winding method in which the wire rope is fixed at B1 on the boom head structure when the lifting system of the crane in the prior art has a 2x ratio.

[0033] Figure 2 This is the rope winding method in which the wire rope is fixed to the B2 of the arm pulley block when the lifting system of the crane in the prior art has a 2x ratio.

[0034] Figure 3 This is the rope winding method in which the wire rope is fixed to G1 of the hook when the lifting system of the crane has a 3x ratio in the prior art.

[0035] Figure 4a A schematic front view of a wire rope end hanging device provided in an embodiment of the present invention.

[0036] Figure 4b A schematic side view of a wire rope end hanging device provided in an embodiment of the present invention.

[0037] Figure 5a A front view schematic diagram of a wire rope end hanging device being hung on a boom pulley block in a lifting system provided in an embodiment of the present invention.

[0038] Figure 5b A side view schematic diagram of a wire rope end hanging device being hung on a boom pulley block in a lifting system provided in an embodiment of the present invention.

[0039] Figure 5c for Figure 5b A is a partial enlarged schematic diagram of .

[0040] Figure 6aA front view schematic diagram of a wire rope end hanging device being hung on a hook pulley block in a lifting system provided in an embodiment of the present invention.

[0041] Figure 6b A side view schematic diagram of a wire rope end hanging device hung on a hook pulley block in a lifting system provided in an embodiment of the present invention.

[0042] Figure 6c for Figure 6b B is a partial enlarged schematic diagram.

[0043] Figure 7 A schematic diagram of the pulley groove bottom diameter D0 of the hook pulley block and the boom pulley block of the lifting system provided in an embodiment of the present invention.

[0044] Reference numerals:

[0045] 1. Winch; 2. Wire rope; 3. Guide pulley; 4. Boom pulley block; 5. Hook pulley block; 6. Hook; 7. Wire rope end hooking device;

[0046] 71. hanging part; 72. connecting part; 73. first connecting splint; 74. second connecting splint; 75. third connecting splint;

[0047] 721, first angle; 722, second angle; 723, third angle;

[0048] 731, first through hole; 732, first groove; 733, first connecting hole;

[0049] 741, second through hole; 743, second connecting hole;

[0050] 751. A third through hole; 752. A third groove; 753. A third connecting hole. DETAILED DESCRIPTION

[0051] Combine the following Figure 4a to Figure 7 The technical solution provided by the present invention is described in more detail. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​described in these embodiments should be interpreted as being merely exemplary and not limiting.

[0052] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of also including other elements.

[0053] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the 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 intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0054] All terms used in the present disclosure, including technical terms or scientific terms, have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0055] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment are considered part of the specification.

[0056] The dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. In the drawings, the same reference numerals are attached to common structural elements or structural elements of the same type, and their repeated descriptions are appropriately omitted.

[0057] Explanation of terms or terms used in this article.

[0058] Crane: A machine used to lift and move heavy objects.

[0059] Jib: A component of a crane located between the main machine and the hook, used to support heavy objects.

[0060] Winch: A mechanism on a crane used to wind up the wire rope and provide tension to the hook through the wire rope.

[0061] Hook: A device on a crane used to hook and lift heavy objects.

[0062] Hook head: The part of a hook used to hold heavy objects.

[0063] Pulley block: A device on a crane that consists of one or more pulleys to achieve a larger pulling force with a smaller single rope pulling force. Pulley blocks include boom pulley blocks and hook pulley blocks.

[0064] Ratio: The number of lifting wire ropes wound between the boom pulley block and the hook pulley block.

[0065] The rope entry angle of the pulley refers to the angle between the direction of the wire rope winding into the hook pulley block and the pulley perpendicular to the axial section.

[0066] Figure 4a A schematic front view of a wire rope end hanging device provided in an embodiment of the present invention. Figure 4b A schematic side view of a wire rope end hanging device provided in an embodiment of the present invention.

[0067] See also Figure 4a and Figure 4b The embodiment of the present invention provides a wire rope end hooking device 7, which is suitable for the hoisting system of a crane. The wire rope end hooking device 7 includes a hooking portion 71 and a connecting portion 72. The hooking portion 71 is configured to be hooked with the boom pulley block 4 or the hook pulley block 5. The connecting portion 72 is rotatably connected to the hooking portion 71; the connecting portion 72 is configured to be rotatably connected to the wire rope 2.

[0068] The structure of the hanging part 71 satisfies: it can be hung with the boom pulley block 4, and can also be hung with the hook pulley block 5. The hanging part 71 is not hung with the boom pulley block 4 and the hook pulley block 5 at the same time, but can be selectively hung with one of the boom pulley block 4 and the hook pulley block 5.

[0069] The hanging part 71 can be implemented in many ways, such as using a plate, a ring, etc. In some embodiments, the hanging part 71 is a hanging rope, specifically a metal rope. The hanging rope of this structure has a certain flexibility, can be deformed, will not damage the pulley, and has excellent load-bearing performance. Both ends of the hanging rope are rotatably connected to the connecting part 72, and the hanging hole surrounded by the hanging rope and the connecting part 72 is shown in FIG. Figure 4a and Figure 7 , the size D1 of the hanging hole is equal to the bottom diameter D0 of the pulley groove of the boom pulley block 4, and the size D1 of the hanging hole is also equal to the bottom diameter D0 of the pulley groove of the hook pulley block 5. The bottom diameter D0 of the pulley groove of the hook pulley block 5 and the bottom diameter D0 of the pulley groove of the boom pulley block 4 are equal. Figure 4a The diameter d1 of the hanging rope is equal to the diameter d2 of the lifting wire rope. The rope end hanging device can rotate around the central axis of the pulley to adapt to different boom elevation angles, so that the direction of the hanging device is consistent with the direction of the tension of the wire rope 2, and the rope end hanging device will not produce bending moment, and the force is more reasonable.

[0070] The connecting portion 72 is used to connect the steel wire rope 2 and the hanging portion 71. The connecting portion 72 can adopt various structures to achieve the connection between the steel wire rope 2 and the hanging portion 71. The connecting portion 72 is, for example, a plate or a rope.

[0071] See also Figure 4a and Figure 4b In some embodiments, the wire rope end hooking device 7 further includes a first connecting clamp plate 73, a second connecting clamp plate 74 and a third connecting clamp plate 75. The first connecting clamp plate 73 connects one end of the hanging rope to the connecting portion 72. The second connecting clamp plate 74 connects the other end of the hanging rope to the connecting portion 72. The third connecting clamp plate 75 connects the lifting wire rope 2 to the connecting portion 72.

[0072] The connecting portion 72 is, for example, a flat plate, which is roughly triangular, wherein two corners are rotatably connected to the hanging rope, and the other corner is connected to the lifting wire rope 2. Specifically, in some embodiments, the connecting portion 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 is rotatably connected to the first connecting clamp plate 73; the second corner 722 is inserted into the second groove and is rotatably connected to the second connecting clamp plate 74; the third corner 723 is provided with a third hole to be rotatably connected to the wire rope 2.

[0073] The structures of the first connecting clamp plate 73, the second connecting clamp plate 74 and the third connecting clamp plate 75 are basically the same.

[0074] See also Figure 4a and Figure 4b , the first connecting clamp plate 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 portion 72 is inserted into the first groove 732 and is rotatably connected to the first connecting clamp plate 73 through the first connecting hole 733. The first connecting clamp plate 73 includes two side plates arranged in parallel and a connecting plate arranged between the two side plates. The connecting plate is provided with a first through hole 731. One end of the hanging rope is inserted into the first through hole 731, and one end of the hanging rope is knotted or provided with a blocking member to prevent the hanging rope from escaping from the first through hole 731. The gap between the two side plates serves as the first groove 732. The first corner of the connecting portion 72 is inserted into the first groove 732. The two side plates are each provided with a first connection hole 733, and the central axes of the two first connection holes 733 coincide with each other. A connection pin hole is correspondingly provided at the first corner of the connection portion 72, and the first connection clamping plate 73 is rotatably connected to the first corner of the connection portion 72 by passing a pin shaft through the first connection holes 733 of the two side plates and the connection pin hole at the first corner of the connection portion 72.

[0075] The second connecting clamp 74 is used to connect the other end of the hanging rope to the second corner of the connecting portion 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 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 member to prevent the hanging rope from falling off from the second through hole 741. The second groove is connected to both the second through hole 741 and the second connecting hole 743; the connecting portion 72 is inserted into the second groove and is rotatably connected to the second connecting clamp 74 through the second connecting hole 743.

[0076] The third connecting clamp 75 is used to connect the lifting wire rope 2 with the third corner of the connecting part 72. The structure of the third connecting clamp 75 is basically the same as that of the second connecting clamp 74 and the first connecting clamp 73. Specifically, the third connecting clamp 75 includes a third through hole 751, a third groove 752 and a third connecting hole 753, and 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 a blocking member is provided to prevent the wire rope 2 from falling off from 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.

[0077] Continue to see Figure 4a The hanging part 71 and the first connecting splint 73 are detachably connected, and there are many ways of detachable connection. The hanging part 71 and the second connecting splint 74 can also be detachably connected, and the specific way of detachable connection is not limited here. The first connecting splint 73 is detachably connected to the connecting part 72, and the second connecting splint 74 is also detachably connected to the connecting part 72. The above-mentioned components are detachably connected, and the wire rope end hanging device 7 can be easily installed on the boom pulley block 4 and the hook pulley block 5; the wire rope end hanging device 7 can also be easily removed from the boom pulley block 4 and the hook pulley block 5.

[0078] Figure 5a A front view schematic diagram of a wire rope end hanging device being hung on a boom pulley block in a lifting system provided in an embodiment of the present invention. Figure 5b A side view schematic diagram of a wire rope end hanging device being hung on a boom pulley block in a lifting system provided in an embodiment of the present invention. Figure 5c for Figure 5b A is a partial enlarged schematic diagram. Figure 6a A front view schematic diagram of a wire rope end hanging device being hung on a hook pulley block in a lifting system provided in an embodiment of the present invention. Figure 6bA side view schematic diagram of a wire rope end hanging device hung on a hook pulley block in a lifting system provided in an embodiment of the present invention. Figure 6c for Figure 6b B is a partial enlarged schematic diagram.

[0079] See also Figures 5a to 6c The embodiment of the present invention further provides a lifting system, comprising a winch 1, a wire rope 2, a guide pulley 3, a boom pulley block 4, a hook 6, and a wire rope end hooking device 7 provided by any technical solution of the present invention. The winch 1 is used to provide power. One end of the wire rope 2 is wound around the winch 1. The guide pulley 3 is 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 intervals from the boom pulley block 4, and the position of the hook pulley block 5 is lower than that of the boom pulley block 4. The hook 6 is connected to the bottom of the hook pulley block 5. The other end of the wire rope 2 is connected to the wire rope end hooking device 7. Among them, the other end of the wire rope 2 is connected to the wire rope end hooking device 7 after being wound through the guide pulley 3 and the boom pulley block 4.

[0080] The other end of the steel wire rope 2 is used to connect the steel wire rope end hooking device 7. If the hoisting system of the winch has several rope ends, several steel wire rope end hooking devices 7 are set. The number of rope ends is the same as the number of steel wire rope end hooking devices 7. The steel wire rope end hooking device 7 can be selectively hooked to one of the pulleys of the boom pulley block 4, see Figure 5a to Figure 5c When the wire rope end hooking device 7 is fixed to the arm pulley block, the wire rope end hooking device 7 is installed on one of the pulleys of the arm pulley block. Since the wire rope end hooking device 7 is a movable installation structure, it can be installed on any pulley, which can ensure that the wire rope 2 maintains a small spacing when winding, for example Figure 5a to Figure 5c The ratio is 2, so that the pulley entry angle θ is less than the maximum angle required by the standard, ensuring the safe operation of the wire rope 2.

[0081] Alternatively, the wire rope end hooking device 7 can be selectively hooked to one of the pulleys of the hook pulley block 5, see Figures 6a to 6c When the wire rope end hanging device 7 is fixed on the hook pulley block 5, the wire rope end hanging device 7 is installed on the hook pulley block 5. Since the wire rope end hanging device 7 is a movable installation structure, it can be installed on any pulley of the hook pulley block 5, which can ensure that the wire rope 2 maintains a small spacing when winding, for example Figures 6a to 6c The 3-fold ratio is set to make the pulley entry angle θ smaller than the maximum angle required by the standard to ensure the safe operation of the wire rope 2.

[0082] In the hoisting system, after the ratio is determined, the position of the wire rope end hooking device 7 is either hung on one of the pulleys of the boom pulley block 4 or one of the pulleys of the hook pulley block 5. Regardless of which pulley it is hung on, the hooking position of the wire rope end hooking device 7 is configured to meet the following conditions: the entry angle of the wire rope 2 is less than the set value. Specifically, the set value is 0° to 2°.

[0083] After the winding method of the steel wire rope 2 is determined, if the final entry angle of the steel wire rope 2 does not meet the requirements, the hanging position of the steel wire rope end hanging device 7 can be changed at any time to make the entry angle of the steel wire rope 2 meet the requirements.

[0084] See also Figure 5a to Figure 5c In some embodiments, the wire rope end hooking device 7 can be selectively hooked to one of the pulleys of the boom pulley block 4, and the entry angle of the wire rope 2 is less than 2°. The wire rope end hooking device 7 adopts this arrangement so that the entry angle of the wire rope is very small.

[0085] See also Figures 6a to 6c In other embodiments, the wire rope end hooking device 7 can be selectively hooked to one of the pulleys of the hook pulley block 5, and the wire rope 2 has a rope entry angle of less than 2°. The wire rope end hooking device 7 adopts this arrangement so that the rope entry angle of the wire rope is very small.

[0086] The embodiment of the present invention further provides a crane, comprising the wire rope end hooking device 7 provided by any technical solution of the present invention. Regardless of the hoisting ratio of the crane, regardless of whether the ratio is large or small, the hooking position of the wire rope end hooking device 7 can be flexibly set to ensure that the entry angle of the wire rope 2 is small enough.

[0087] In some embodiments, the crane is a crawler crane or other type of crane.

[0088] The lifting system of the crawler crane is equipped with a high-strength steel wire rope 2 and an efficient drum. The lifting height of the lifting system can meet the needs of large-scale engineering construction, and can reach a height of tens of meters, even hundreds of meters, or even hundreds of meters. The lifting speed can also be flexibly adjusted, which is achieved by accurately controlling the rotation speed of the winch 1. In actual lifting operations, operators can choose a suitable lifting speed according to the weight, shape and working conditions of the object being lifted. For example, when lifting lighter objects that require a faster positioning speed, the lifting speed can be increased to speed up the lifting process; when lifting heavy or precision equipment, the lifting speed can be reduced to ensure the safety and accuracy of the lifting. In addition, the lifting stability is good, and the chassis of the crawler crane is wide and the center of gravity is low, which provides a good stability foundation for the lifting system. During the lifting process, when the heavy object is lifted, the crawler of the crane can effectively resist the overturning moment caused by the displacement of the center of gravity of the heavy object or the lifting force. At the same time, the lifting system can accurately control the lifting and lowering of heavy objects, prevent the sudden fall of heavy objects, and further enhance the stability of lifting. This stability enables crawler cranes to ensure the safe placement of equipment when lifting large, high-precision equipment and ensure the stability of lifting operations.

[0089] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the protection content of the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0090] In the description of the present invention, each technical feature may be combined with other technical features where feasible.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wire rope end hooking device, characterized in that: include: The hanging part (71) is configured to be hung with the boom pulley block (4) or the hook pulley block (5); as well as The connecting portion (72) is rotatably connected to the hanging portion (71); the connecting portion (72) is constructed to be rotatably connected to the steel wire rope (2).

2. The wire rope end hanging device according to claim 1 is characterized in that: The hanging portion (71) is a hanging rope, both ends of which are rotatably connected to the connecting portion (72), and the hanging rope and the connecting portion (72) form a hanging hole, the size of which is equal to the bottom diameter D0 of the pulley groove of the boom pulley block (4), and the size of which is also equal to the bottom diameter D0 of the pulley groove of the hook pulley block (5).

3. The wire rope end hanging device according to claim 2 is characterized in that: Also includes: The first connecting clamp (73) comprises 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 the first through hole (731) and the first connecting hole (733); the connecting portion (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) comprises a second through hole (741), a second groove 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 is connected to the second through hole (741) and the second connecting hole (743); the connecting portion (72) is inserted into the second groove and is rotatably connected to the second connecting clamp (74) through the second connecting hole (743); as well as The third connecting clamp (75) comprises a third through hole (751), a third groove (752) and a third connecting hole (753), wherein 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 portion (72) is inserted into the third groove (752) and is rotatably connected to the third connecting clamp (75).

4. The wire rope end hanging device according to claim 3 is characterized in that: The connecting portion (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 is rotatably connected to the first connecting clamp (73); the second corner (722) is inserted into the second groove and is rotatably connected to the second connecting clamp (74); the third corner (723) is provided with the third hole so as to be rotatably connected to the steel wire rope (2).

5. A lifting system, characterized in that: include: A winch (1) configured to provide power; A steel wire rope (2), one end of which is wound around the winch (1); A guide pulley (3) is arranged at a distance from the winch (1); A boom pulley block (4) is arranged spaced apart from the guide pulley (3); A hook pulley block (5) is arranged at a distance from the boom pulley block (4) and is located lower than the boom pulley block (4); A hook (6) connected below the hook pulley block (5); as well as The wire rope end hooking device (7) of any one of claims 1 to 4, wherein the other end of the wire rope (2) is connected to the wire rope end hooking device (7); the wire rope end hooking device (7) can be selectively hooked to one of the pulleys of the boom pulley block (4), or the wire rope end hooking device (7) can be selectively hooked to one of the pulleys of the hook pulley block (5); The other end of the steel wire rope (2) is wound around the guide pulley (3) and the boom pulley block (4).

6. The lifting system according to claim 5, characterized in that: The hooking position of the wire rope end hooking device (7) is constructed to satisfy the following condition: the entry angle of the wire rope (2) is smaller than a set value.

7. The lifting system according to claim 6, characterized in that: The set value is 0° to 2°.

8. The lifting system according to claim 5, characterized in that: The wire rope end hooking device (7) can be selectively hooked 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 claim 5, characterized in that: The wire rope end hanging device (7) can be selectively hung on 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, characterized in that: It comprises the wire rope end hanging device (7) as described in any one of claims 1 to 4.

11. The crane according to claim 10, characterized in that The crane is a crawler crane.

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