Variable-amplitude steel wire rope tensioning device for tower crane
By designing the tensioning wire rope tensioning device for tower cranes, and using the combination of the traction machine and pulley set, the problems of free hanging of the wire rope in tower cranes are solved, and the effective tensioning effect is achieved.
Patent Information
- Application Number
- CN202420934062.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In tower cranes, as the load increases, the free overhang of the variable-wire rope increases, resulting in labor-intensive manual operation and it is difficult for traditional tensioning devices to tighten in place.
A web-changing wire rope tensioning device for tower machines is designed, including a traction machine, a traction rope, a traction track and a pulley set. The traction rope is tightened by the traction machine, and the pulley set is driven to move along the traction track to achieve tensioning of the web-changing wire rope.
The device provides strong tension and sufficient rope capacity, which can effectively tighten the wire rope with a wide range, solving the problems of manual operation and insufficient tension.
Smart Images
Figure CN222433998U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a tower crane, and in particular to a luffing wire rope tensioning device for a tower crane. Background Art
[0002] In the early days, the luffing wire rope tensioner was installed on a load-bearing trolley, and the luffing wire rope was tensioned manually using an operating lever. As the luffing wire rope was gradually tightened, the tension in the luffing wire rope would also increase. Until the manual operation could no longer be performed, the wire rope was still not tightened enough.
[0003] Generally speaking, the luffing wire rope of a small tower crane is relatively light in weight and has a small free overhang, so it is easy to tighten it using a traditional tensioning device. However, as the load of the tower crane gradually increases, the luffing wire rope increases accordingly. The tensioning device on the trolley requires greater force to tighten the luffing wire rope into place, which is generally difficult to do with human strength. Utility Model Content
[0004] The utility model aims to provide a luffing wire rope tensioning device for tower crane, which is added in the boom for auxiliary use to make up for the problem of insufficient human strength. The device can provide strong pulling force and sufficient rope capacity to tighten the luffing wire rope.
[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.
[0006] The embodiment of the present application discloses a luffing wire rope tensioning device for a tower crane, comprising a traction machine, a traction rope, a traction track, and a pulley block, wherein the traction track comprises two slide rails arranged opposite to each other, the traction rope is respectively connected to the traction machine and the pulley block, the pulley block is slidably installed between the two slide rails, the pulley block comprises a tensioning pulley, and the luffing wire rope is wound around the tensioning pulley.
[0007] When the traction machine tightens the traction rope, the traction rope drives the pulley block to move along the traction track, and drives the tensioning pulley to move, thereby achieving the tensioning of the variable-length steel wire rope.
[0008] Preferably, in the above-mentioned variable-length wire rope tensioning device for a tower crane, the pulley block includes a movable pulley, a fixed pulley is provided at the traction machine, one end of the traction rope is connected to the traction machine, and then is sequentially wound around the movable pulley, the fixed pulley, and the movable pulley, and finally fixed to a fixed point provided below the fixed pulley.
[0009] Preferably, in the above-mentioned variable-length wire rope tensioning device for tower crane, clamping structures are formed on both sides of the pulley block, and the clamping structure includes two top support blocks relatively arranged and affixed to the top surface of the slide rail, and a bottom support rod affixed to the bottom surface of the slide rail.
[0010] Preferably, in the above-mentioned variable-length wire rope tensioning device for tower crane, a positioning pin hole is formed on the side of the pulley block, and a plurality of gear pin holes are arranged on the side of the slide rail along its extension direction, and the position of the pulley block is fixed by inserting a pin shaft into the positioning pin hole and the gear pin hole.
[0011] Preferably, in the above-mentioned luffing wire rope tensioning device for tower crane, the top support block is formed with an L-shaped bayonet, which is respectively fitted on the top surface and the inner side surface of the slide rail.
[0012] Compared with the prior art, the advantage of this technical solution is that it solves the problems of too much free overhang of the luffing wire rope, laborious manual operation and insufficient tensioning. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0014] Figure 1 Shown is an initial diagram of a luffing wire rope tensioning device for a tower crane in an embodiment of the utility model;
[0015] Figure 2 The figure shows the movement diagram of the luffing wire rope tensioning device for tower crane in the embodiment of the utility model;
[0016] Figure 3 The figure shows the final diagram of the luffing wire rope tensioning device for tower crane in the embodiment of the utility model;
[0017] Figure 4 Shown is a schematic diagram of a pulley block in an embodiment of the utility model. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to describe the technical solutions in the embodiments of the utility model in detail. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] Combination Figure 1-Figure 4As shown, a luffing wire rope tensioning device 100 for a tower crane comprises a traction machine 101, a traction rope 102, a traction track 103, and a pulley block 104. The traction track 103 comprises two slide rails 105 arranged opposite to each other. The traction rope 102 connects the traction machine 101 and the pulley block 104 respectively. The pulley block 104 is slidably installed between the two slide rails 105. The pulley block 104 comprises a tensioning pulley 106. The luffing wire rope 107 is wound around the tensioning pulley 106.
[0020] When the traction machine 101 tightens the traction rope 102 , the traction rope 102 drives the pulley group 108 104 to move along the traction track 103 , and drives the tensioning pulley 106 to move, thereby achieving the tensioning of the variable-length steel wire rope 107 .
[0021] A positioning pin hole 113 is formed on the side of the pulley block 104, and a plurality of gear pin holes 114 are arranged on the side of the slide rail 105 along its extension direction. The position of the pulley block 104 is fixed by inserting a pin shaft 115 into the positioning pin hole 113 and the gear pin hole 114.
[0022] In this embodiment, due to the characteristics of large force and small rope capacity, when the tower crane is installed, the variable-length wire rope is first pulled with a traditional trolley tensioning device. Since the variable-length wire rope has a large deadweight, it is difficult to tighten it into place with human power. The rope is stopped until it can no longer be pulled. Then, in the boom, the technical solution is used, and only a remote control of the traction machine is required. The device can provide greater force, and the traction rope pulls the pulley block to move. After the variable-length wire rope is tightened into place, the pulley block can be locked with a pin shaft.
[0023] Furthermore, the pulley block 104 includes a movable pulley 108, a fixed pulley 109 is provided at the traction machine 101, one end of the traction rope 102 is connected to the traction machine 101, and then is sequentially wound around the movable pulley 108, the fixed pulley 109, and the movable pulley 108, and finally fixed to a fixed point 110 provided below the fixed pulley 109.
[0024] In this embodiment, the pulling force of the traction machine is reduced by providing a movable pulley.
[0025] Furthermore, clamping structures are formed on both sides of the pulley block 104, and the clamping structures include two top support blocks 111 arranged opposite to each other and fitted to the top surface of the slide rail 105, and a bottom support rod 112 fitted to the bottom surface of the slide rail 105. The top support block 111 is formed with an L-shaped bayonet, which is fitted to the top surface and the inner side surface of the slide rail 105, respectively.
[0026] In this embodiment, the pulley block is maintained between the two slide rails, thereby ensuring stability.
[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0028] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A luffing wire rope tensioning device for a tower crane, characterized in that: It includes a traction machine, a traction rope, a traction track, and a pulley block. The traction track includes two slide rails arranged opposite to each other. The traction rope connects the traction machine and the pulley block respectively. The pulley block is slidably installed between the two slide rails. The pulley block includes a tension pulley. The variable amplitude steel wire rope is wound around the tension pulley. When the traction machine tightens the traction rope, the traction rope drives the pulley block to move along the traction track, and drives the tensioning pulley to move, thereby achieving the tensioning of the variable-length steel wire rope.
2. The luffing wire rope tensioning device for tower crane according to claim 1, characterized in that: The pulley block includes a movable pulley, and a fixed pulley is arranged at the traction machine. One end of the traction rope is connected to the traction machine, and then is sequentially wound around the movable pulley, the fixed pulley, and the movable pulley, and finally fixed to a fixed point arranged below the fixed pulley.
3. The luffing wire rope tensioning device for tower crane according to claim 1, characterized in that: Clamping structures are formed on both sides of the pulley block, and the clamping structures include two top support blocks that are oppositely arranged and affixed to the top surface of the slide rail, and a bottom support rod that affixes to the bottom surface of the slide rail.
4. The luffing wire rope tensioning device for tower crane according to claim 1, characterized in that: A positioning pin hole is formed on the side of the pulley block, and a plurality of gear pin holes are arranged on the side of the slide rail along its extension direction. The position of the pulley block is fixed by inserting a pin shaft into the positioning pin hole and the gear pin hole.
5. The luffing wire rope tensioning device for tower crane according to claim 3, characterized in that: The top support block is formed with an L-shaped bayonet, which is respectively fitted on the top surface and the inner side surface of the slide rail.