Pre-tightening force applying device for steel wire rope of tower crane

Abstract

The utility model discloses a tower crane steel wire rope pre-tightening force applying device which comprises a mounting top plate, a supporting beam, a top supporting arm, an adjusting lead screw, an adjusting sleeve, a bottom supporting arm, a force applying wheel, wear-resisting rubber and a limiting bottom plate, the mounting top plate and a fixing plate are tightly pressed at the top and the bottom of the supporting beam respectively, and the top supporting arm is arranged at the bottom of the fixing plate. A top sleeve is fixedly sleeved in a groove formed in the bottom of the top support arm; the adjusting lead screw is rotated to drive the bottom supporting arm to move downwards, the force application wheel is made to abut against the steel wire, meanwhile, the limiting bottom plate is installed at the bottom of the side support through the locking bolt, then the steel wire and the force application wheel are properly locked through the abrasion-resistant rubber, and friction force generated by the steel wire and the abrasion-resistant rubber provides pre-tightening force for rope arrangement during rope arrangement. The rope arrangement efficiency of steel wires lifted by the tower crane is high, the ropes are not easy to disorderly, the damage of the steel wires caused by mutual extrusion of the steel wires during hoisting is avoided, and the safety performance is good; and the safety and the economical efficiency of the tower crane steel wire in use are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of tower crane wire rope inspection and maintenance technology, and in particular to a tower crane wire rope pretensioning device. Background Technology

[0002] During tower crane operation, the hoisting wire ropes are prone to tangling, and once they reach the scrap standard, they need to be replaced. When arranging or replacing the hoisting wire ropes, the hook must be lowered to the ground, preventing the wire ropes from utilizing the weight of the hook to provide pre-tension. After arranging the wire ropes, due to insufficient pre-tension, the upper wire ropes can easily squeeze into the lower wire ropes during use, causing damage. Wire rope arranging is difficult, and after arranging, the wire ropes are prone to tangling again or even damage, resulting in poor economy and safety. Therefore, it is necessary to design a tower crane wire rope pre-tensioning device to replace the hook in providing pre-tension for rope arranging, thereby improving the efficiency of hoisting wire rope arranging, reducing tangling, and preventing damage caused by mutual compression of wires during lifting. Utility Model Content

[0003] The purpose of this invention is to provide a pretensioning device for tower crane wire ropes, which solves the problems of existing methods where, during rope arrangement or replacement of hoisting wire ropes, the hook must be lowered to the ground, resulting in the hoisting wire ropes not being able to utilize the weight of the hook to provide pretensioning force; after the wire ropes are arranged, due to insufficient pretensioning force, the upper wire ropes are easily squeezed into the lower wire ropes during use, causing damage; the wire rope arrangement is difficult, and after arrangement, the wire ropes are prone to tangling or even damage again, resulting in poor economy and safety.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tower crane wire rope pretensioning device, comprising a mounting top plate, a support beam, a top support arm, a top sleeve, an adjusting screw, an adjusting sleeve, a bottom support arm, side supports, a support shaft, a force-applying wheel, steel wire, wear-resistant rubber, and a limiting base plate. The top and bottom of the support beam are respectively pressed with the mounting top plate and a fixing plate, and the bottom of the fixing plate is provided with a top support arm. A top sleeve is fixedly sleeved in a groove opened at the bottom of the top support arm. A support rod is connected to the top sleeve by a threaded connection. A connecting section is provided at the bottom of the support rod, and an adjusting screw is rotatably connected to the top of the connecting section. An adjusting sleeve is connected to the adjusting screw by a threaded connection. The adjusting sleeve is fixedly sleeved in a groove opened at the top of the bottom support arm. Side supports are symmetrically arranged on both sides of the bottom of the bottom support arm, and a support shaft is sleeved in the side supports. A force-applying wheel is connected to the support shaft by a bearing. A steel wire is rolled on the force-applying wheel, and the steel wire is attached to the top of the wear-resistant rubber.

[0005] As a further technical solution of this utility model, top bolts are fitted into the symmetrically opened through holes on the mounting top plate and the fixing plate, and the top and bottom ends of the top bolts are connected to fixing nuts by threaded engagement.

[0006] As a further technical solution of this utility model, the top end of the support rod is fixedly connected to the top support arm by a pin.

[0007] As a further technical solution of this utility model, the wear-resistant rubber is fixed at the top center of the limiting base plate.

[0008] As a further technical solution of this utility model, locking bolts are sleeved in the through holes symmetrically opened on the limiting base plate, and the locking bolts are sleeved in the through holes opened on the clamping plate.

[0009] As a further technical solution of this utility model, the clamping plate is fixed to the bottom of both sides of the side bracket.

[0010] As a further technical solution of this utility model, the bottom end of the locking bolt is connected to a locking nut by a threaded connection, and the locking nut is pressed tightly against the bottom of the limiting base plate.

[0011] This utility model provides a pre-tensioning device for tower crane wire ropes, which has the following advantages: The mounting plate and fixing plate are installed on the support beam of the tower crane via the fixing nut on the top bolt. The top support arm at the bottom of the fixing plate, connecting rod, connecting section, and adjusting screw constitute the position adjustment structure of the force-applying wheel. By rotating the adjusting screw, the bottom support arm can be moved downwards through the threaded engagement between the adjusting screw and the adjusting sleeve. After adjustment, the force-applying wheel is pressed against the wire rope. Simultaneously, the clamping plate is installed at the bottom of the side support via the locking bolt. Then, the wear-resistant rubber on the limiting base plate appropriately locks the wire rope and the force-applying wheel. During rope laying, the friction between the wire rope and the wear-resistant rubber provides pre-tensioning force, resulting in high rope laying efficiency for tower crane hoisting, less rope tangling, and avoidance of damage to the wire rope caused by mutual compression during lifting, thus ensuring good safety performance. This greatly improves the safety and economy of using tower crane wire ropes. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0015] Figure 3 This is a partial structural assembly diagram of the present invention;

[0016] Figure 4 This is a side view of the structure of this utility model;

[0017] Figure 5 This is a schematic diagram showing the installation position when using this utility model.

[0018] In the diagram: 1. Mounting top plate; 2. Top bolt; 3. Fixing plate; 4. Fixing nut; 5. Support beam; 6. Top support arm; 7. Top sleeve; 8. Support rod; 9. Connecting section; 10. Adjusting screw; 11. Adjusting sleeve; 12. Bottom support arm; 13. Side bracket; 14. Support shaft; 15. Force wheel; 16. Steel wire; 17. Wear-resistant rubber; 18. Limiting base plate; 19. Locking bolt; 20. Clamping plate; 21. Locking nut. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see the appendix Figure 1 -Appendix Figure 5This utility model provides an embodiment of a tower crane wire rope pretensioning device, comprising a mounting top plate 1, a support beam 5, a top support arm 6, a top sleeve 7, an adjusting screw 10, an adjusting sleeve 11, a bottom support arm 12, a side bracket 13, a support shaft 14, a force-applying wheel 15, a steel wire 16, wear-resistant rubber 17, and a limiting base plate 18. The top and bottom of the support beam 5 are respectively pressed against the mounting top plate 1 and a fixing plate 3. The bottom of the fixing plate 3 is provided with the top support arm 6. The top sleeve 7 is fixedly sleeved in a groove at the bottom of the top support arm 6. A support rod 8 is threadedly connected to the top sleeve 7. The bottom of the support rod 8 is provided with a connecting section 9, and the top of the connecting section 9 is rotatably connected to the adjusting screw 10. The adjusting sleeve 11 is threadedly connected to the adjusting screw 10. The adjusting sleeve 11 is fixedly sleeved in a groove at the top of the bottom support arm 12. Side brackets 13 are symmetrically arranged on both sides of the bottom of the bottom support arm 12. A support shaft 14 is sleeved in the middle, and a force-applying wheel 15 is connected to the support shaft 14 via a bearing. A steel wire 16 is rolled on the force-applying wheel 15 and fits against the top of the wear-resistant rubber 17. Top bolts 2 are sleeved in the symmetrical through holes on the mounting top plate 1 and the fixing plate 3. The top and bottom ends of the top bolts 2 are connected to the fixing nuts 4 by threaded engagement. The top end of the support rod 8 is fixedly connected to the top support arm 6 by a pin. The wear-resistant rubber 17 is fixed to the limiting base plate 18. At the top center; locking bolts 19 are fitted into the through holes symmetrically opened on the limiting base plate 18, and the locking bolts 19 are fitted into the through holes opened on the clamping plate 20; the clamping plate 20 is fixed to the bottom of both sides of the side bracket 13; the bottom end of the locking bolt 19 is connected to the locking nut 21 by thread engagement, and the locking nut 21 is pressed tightly against the bottom of the limiting base plate 18. The locking nut 21 is provided to facilitate the movement of the limiting base plate 18 upward by engaging with the locking bolt 19;

[0022] Specifically, in use, firstly, the mounting plate 1 and the fixing plate 3 are installed on the support beam 5 of the tower crane using the fixing nut 4 on the top bolt 2. The top support arm 6 at the bottom of the fixing plate 3 connects to the support rod 8, the connecting section 9, and the adjusting screw 10 to form the position adjustment structure of the force-applying wheel 15. By rotating the adjusting screw 10, the bottom support arm 12 can be moved down by the threaded engagement between the adjusting screw 10 and the adjusting sleeve 11. After adjustment, the force-applying wheel 15 is pressed against the steel wire 16, and simultaneously locked. Bolt 19 installs the limiting base plate 18 at the bottom of the side bracket 13, and then the wear-resistant rubber 17 on the limiting base plate 18 appropriately locks the steel wire 16 to the force wheel 15. When the rope is laid, the friction between the steel wire 16 and the wear-resistant rubber 17 provides pre-tension for the rope laying, which makes the rope laying efficiency of the tower crane hoisting steel wire 16 high, less prone to tangling, and avoids the damage to the steel wire 16 caused by mutual compression when lifting heavy loads, thus ensuring good safety performance. It greatly improves the safety and economy of using the tower crane steel wire 16.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tower crane wire rope pretensioning device, comprising a mounting top plate (1), a support beam (5), a top support arm (6), a top sleeve (7), an adjusting screw (10), an adjusting sleeve (11), a bottom support arm (12), a side bracket (13), a support shaft (14), a force-applying wheel (15), a steel wire (16), wear-resistant rubber (17), and a limiting base plate (18), characterized in that: The top and bottom of the support beam (5) are respectively pressed with a mounting plate (1) and a fixing plate (3), and a top support arm (6) is provided at the bottom of the fixing plate (3). A top sleeve (7) is fixedly sleeved in a groove opened at the bottom of the top support arm (6). A support rod (8) is connected to the top sleeve (7) by a threaded connection. A connecting section (9) is provided at the bottom of the support rod (8), and an adjusting screw (10) is rotatably connected to the top of the connecting section (9). The adjusting screw (10) is... An adjusting sleeve (11) is connected by a threaded connection. The adjusting sleeve (11) is fixedly fitted into a groove opened at the top of the bottom support arm (12). Side brackets (13) are symmetrically arranged on both sides of the bottom of the bottom support arm (12). A support shaft (14) is fitted in the side bracket (13). A force wheel (15) is connected to the support shaft (14) by a bearing. A steel wire (16) is rolled on the force wheel (15). The steel wire (16) is attached to the top of the wear-resistant rubber (17).

2. The tower crane wire rope pretensioning device according to claim 1, characterized in that: Top bolts (2) are fitted into the through holes symmetrically opened on the mounting top plate (1) and the fixing plate (3). The top and bottom ends of the top bolts (2) are connected to fixing nuts (4) by threaded connection.

3. The tower crane wire rope pretensioning device according to claim 1, characterized in that: The top end of the support rod (8) is fixedly connected to the top support arm (6) by a pin.

4. The tower crane wire rope pretensioning device according to claim 1, characterized in that: The wear-resistant rubber (17) is fixed at the top center of the limiting base plate (18).

5. The tower crane wire rope pretensioning device according to claim 4, characterized in that: Locking bolts (19) are fitted into the through holes symmetrically opened on the limiting base plate (18), and the locking bolts (19) are fitted into the through holes opened on the clamping plate (20).

6. The tower crane wire rope pretensioning device according to claim 5, characterized in that: The clamping plate (20) is fixed to the bottom of both sides of the side bracket (13).

7. The tower crane wire rope pretensioning device according to claim 5, characterized in that: The bottom end of the locking bolt (19) is connected to a locking nut (21) by a threaded connection, and the locking nut (21) is pressed tightly against the bottom of the limiting base plate (18).

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