CN218145371U

CN218145371U - Tower crane hook nut

Info

Publication number: CN218145371U
Application number: CN202222251451.5U
Authority: CN
Inventors: 马杰; 李韶兴; 张水成
Original assignee: Shaoguan Defeng Machinery Co ltd
Current assignee: Shaoguan Defeng Machinery Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-27
Anticipated expiration: 2032-08-25

Abstract

The utility model relates to the technical field of crane hooks, in particular to a tower crane hook nut, which comprises a pulley shaft, a connecting beam, a hook nut, two hook pulleys and two pull plates; two hook pulleys are respectively arranged at two ends of a pulley shaft, two pull plates are connected with the pulley shaft, a connecting beam is fixedly connected between the bottom ends of the two pull plates, a hook is arranged at the bottom end of the connecting beam, the top end of the hook is connected with a threaded column, a central hole for the threaded column to pass through is formed in the connecting beam, and a hook nut is arranged at the upper end of the connecting beam and is in threaded connection with the threaded column; the periphery of the lifting hook nut is provided with a plurality of limiting strips, the upper end of the connecting beam is slidably provided with a limiting fixture block, the lateral part of the limiting fixture block is connected with a connecting shaft, a through hole for the connecting shaft to movably penetrate through is formed in the pull plate on the corresponding side, the other end of the connecting shaft is connected with a pull ring, and a spring is sleeved on the connecting shaft. The utility model discloses can effectively prevent not hard up of lifting hook nut, ensure the stability that the lifting hook is connected.

Description

Tower crane hook nut

Technical Field

The utility model relates to a crane hook technical field especially relates to tower crane hook nut.

Background

The crane refers to a multi-action hoisting machine for vertically lifting and horizontally transporting heavy objects within a certain range, and along with the continuous development of economy in China, the application range and the application field of the crane are more and more extensive. A lifting hook is an important part of a crane and is used for hooking workpieces.

Chinese patent with publication number CN203809468U discloses a hook nut, which comprises a hook nut body provided with a counter bore type concave cavity for mounting a bearing at a thread screwing end, and is characterized in that: a circular ring unloading groove is formed in the bottom surface of the cavity of the lifting hook nut, and a thin-wall internal thread section extending downwards is arranged on the inner side of the circular ring unloading groove, so that the rigidity of original threads stressed greatly is reduced, force is transferred to the original threads stressed slightly, and the force borne by a plurality of circles of threads at the main stress position is relatively balanced.

The above patent still has the following defects in the practical use process: the nut is easy to loosen after collision is generated between the lifting hook and an object, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical problem who exists among the background art, the utility model provides a tower crane lifting hook nut.

The technical scheme of the utility model: the tower crane hook nut comprises a pulley shaft, a connecting beam, a hook nut, two hook pulleys and two pull plates; two hook pulleys are respectively arranged at two ends of a pulley shaft, two pull plates are connected with the pulley shaft, a connecting beam is fixedly connected between the bottom ends of the two pull plates, a hook is arranged at the bottom end of the connecting beam, the top end of the hook is connected with a threaded column which is integrally formed with the hook, a central hole for the threaded column to pass through is formed in the connecting beam, and a hook nut is arranged at the upper end of the connecting beam and is in threaded connection with the threaded column; the upper end of the lifting hook nut is symmetrically connected with two fixing pieces; the peripheral part of the lifting hook nut is provided with a plurality of limiting strips along an annular array, a limiting clamping block is slidably mounted at the upper end of the connecting cross beam, the side part of the limiting clamping block is connected with a connecting shaft, a through hole for the connecting shaft to movably penetrate is formed in the pull plate on the corresponding side, the other end of the connecting shaft is connected with a pull ring, a spring is sleeved on the connecting shaft, and the spring is abutted against the limiting clamping block.

Preferably, the end part of the connecting shaft is rotatably connected with the limiting clamping block, a sliding block is fixed on the connecting shaft, and a sliding groove for the sliding block to slide is formed in the inner side wall of the through hole.

Preferably, the lower part of the threaded column is fixed with a positioning key, and the side wall of the central hole is provided with a key groove for matching the positioning key.

Preferably, the bottom end of the hook nut is provided with a rubber gasket.

Compared with the prior art, the above technical scheme of the utility model following profitable technological effect has: with the navigation key and the alignment keyway on the screw post, make the navigation key insert in the keyway, the design of this structure can prevent that the lifting hook from taking place not hard up after the installation, and the screw post passes the centre bore on the connecting beam this moment, with lifting hook nut and screw post threaded connection, outside pulling ring drives spacing fixture block and removes this moment, rotate the position of injecing with the lifting hook nut again, loosen the lifting hook promptly, drive spacing fixture block and reset under the effect of spring force, the tip card of spacing fixture block is to between two spacing strips this moment, thereby accomplish the fixed work to the lifting hook, the design of this structure can effectively prevent that the lifting hook nut from producing not hard up, the stability of lifting hook connection has been ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the middle hook nut of the present invention.

Fig. 3 is a schematic view of a part a of the enlarged structure of fig. 1.

Reference numerals are as follows: 1. a hook pulley; 2. a pulley shaft; 3. pulling a plate; 301. a chute; 4. connecting the cross beam; 401. a key slot; 5. a hook; 6. a threaded post; 7. a hook nut; 8. a fixing sheet; 9. a limiting strip; 10. a rubber gasket; 11. a positioning key; 12. a limiting clamping block; 13. a connecting shaft; 14. a pull ring; 15. a spring; 16. a slide block.

Detailed Description

Example one

As shown in fig. 1-3, the tower crane hook nut provided by the present invention comprises a pulley shaft 2, a connecting beam 4, a hook nut 7, two hook pulleys 1 and two pulling plates 3; two hook pulleys 1 are respectively arranged at two ends of a pulley shaft 2, two pull plates 3 are both connected with the pulley shaft 2, a connecting crossbeam 4 is fixedly connected between the bottom ends of the two pull plates 3, a hook 5 is arranged at the bottom end of the connecting crossbeam 4, the top end of the hook 5 is connected with a threaded column 6 which is integrally formed with the hook 5, a central hole for the threaded column 6 to pass through is formed in the connecting crossbeam 4, and a hook nut 7 is arranged at the upper end of the connecting crossbeam 4 and is in threaded connection with the threaded column 6; the bottom end of the lifting hook nut 7 is provided with a rubber gasket 10; a positioning key 11 is fixed at the lower part of the threaded column 6, and a key slot 401 for the positioning key 11 to be matched is arranged on the side wall of the central hole; the upper end of the lifting hook nut 7 is symmetrically connected with two fixing pieces 8; the periphery of the lifting hook nut 7 is provided with a plurality of limiting strips 9 in an annular array, the upper end of the connecting beam 4 is slidably provided with a limiting fixture block 12, the lateral part of the limiting fixture block 12 is connected with a connecting shaft 13, a through hole for the connecting shaft 13 to movably penetrate is formed in the pull plate 3 on the corresponding side, the other end of the connecting shaft 13 is connected with a pull ring 14, a spring 15 is sleeved on the connecting shaft 13, and the spring 15 is tightly abutted to the limiting fixture block 12.

Example two

As shown in fig. 1-3, the tower crane hook nut provided by the present invention comprises a pulley shaft 2, a connecting beam 4, a hook nut 7, two hook pulleys 1 and two pulling plates 3; two hook pulleys 1 are respectively arranged at two ends of a pulley shaft 2, two pull plates 3 are both connected with the pulley shaft 2, a connecting crossbeam 4 is fixedly connected between the bottom ends of the two pull plates 3, a hook 5 is arranged at the bottom end of the connecting crossbeam 4, the top end of the hook 5 is connected with a threaded column 6 which is integrally formed with the hook 5, a central hole for the threaded column 6 to pass through is formed in the connecting crossbeam 4, and a hook nut 7 is arranged at the upper end of the connecting crossbeam 4 and is in threaded connection with the threaded column 6; the bottom end of the hook nut 7 is provided with a rubber gasket 10; a positioning key 11 is fixed at the lower part of the threaded column 6, and a key groove 401 for matching the positioning key 11 is arranged on the side wall of the central hole; the upper end of the lifting hook nut 7 is symmetrically connected with two fixing pieces 8; the periphery of the lifting hook nut 7 is provided with a plurality of limiting strips 9 in an annular array, the upper end of the connecting beam 4 is slidably provided with a limiting fixture block 12, the lateral part of the limiting fixture block 12 is connected with a connecting shaft 13, a through hole for the connecting shaft 13 to movably penetrate is formed in the pull plate 3 on the corresponding side, the other end of the connecting shaft 13 is connected with a pull ring 14, a spring 15 is sleeved on the connecting shaft 13, and the spring 15 is tightly abutted to the limiting fixture block 12.

The end part of the connecting shaft 13 is rotatably connected with the limiting clamping block 12, a sliding block 16 is fixed on the connecting shaft 13, a sliding groove 301 for the sliding block 16 to slide is formed in the inner side wall of the through hole, the connecting shaft 13 is pulled outwards to a limited position, the sliding block 16 is moved out from the inner side of the sliding groove 301 at the moment, the connecting shaft 13 is driven to rotate, then the pull ring 14 is loosened, and the sliding block 16 is clamped on the outer side wall of the pull plate 3 at the moment, so that the pull ring 14 does not need to be continuously pulled.

The working principle of the utility model is as follows: with the navigation key 11 on the screw post 6 and aim at keyway 401, make navigation key 11 insert in keyway 401, the design of this structure can prevent that lifting hook 5 from taking place not hard up after the installation, and screw post 6 passed the centre bore on the connecting beam 4 this moment, with lifting hook nut 7 and screw post 6 threaded connection, outside pulling pull ring 14 this moment drives spacing fixture block 12 and removes, rotate lifting hook nut 7 to the position of injecing again, loosen pull ring 14 promptly, drive spacing fixture block 12 under the effect of spring 15 elasticity and reset, the tip card of spacing fixture block 12 this moment is to between two spacing strips 9, thereby accomplish the fixed work to lifting hook 5, the design of this structure can prevent effectively that lifting hook nut 7 from producing not hard up, the stability of lifting hook 5 connection has been ensured.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. The tower crane hook nut is characterized by comprising a pulley shaft (2), a connecting cross beam (4), a hook nut (7), two hook pulleys (1) and two pull plates (3);

two lifting hook pulleys (1) are respectively installed at two ends of a pulley shaft (2), two pull plates (3) are connected with the pulley shaft (2), a connecting cross beam (4) is fixedly connected between the bottom ends of the two pull plates (3), a lifting hook (5) is arranged at the bottom end of the connecting cross beam (4), the top end of the lifting hook (5) is connected with a threaded column (6) which is integrally formed with the lifting hook, a central hole for the threaded column (6) to pass through is formed in the connecting cross beam (4), and a lifting hook nut (7) is arranged at the upper end of the connecting cross beam (4) and is in threaded connection with the threaded column (6); the upper end of the lifting hook nut (7) is symmetrically connected with two fixing pieces (8); the peripheral portion of lifting hook nut (7) is provided with a plurality of spacing strips (9) along annular array, the upper end slidable mounting of connecting beam (4) has spacing fixture block (12), the lateral part of spacing fixture block (12) is connected with connecting axle (13), set up the perforation that supplies connecting axle (13) activity to run through on arm-tie (3) of corresponding side, the other end of connecting axle (13) is connected with pull ring (14), the cover is equipped with spring (15) on connecting axle (13), spring (15) and spacing fixture block (12) support tightly.

2. A tower crane hook nut as claimed in claim 1, characterized in that the end of the connecting shaft (13) is rotatably connected to the limiting block (12), a slider (16) is fixed to the connecting shaft (13), and a sliding groove (301) for the slider (16) to slide is formed in the inner side wall of the through hole.

3. A tower crane hook nut as claimed in claim 1, characterised in that a locating key (11) is fixed to the lower part of the threaded post (6) and a keyway (401) is provided in the side wall of the central bore for the locating key (11) to engage.

4. A tower crane hook nut according to claim 1, characterized in that the bottom end of the hook nut (7) is provided with a rubber gasket (10).