Novel lifting hook structure

Abstract

The utility model discloses a novel lifting hook structure which comprises a pulley, a primary balance beam, a secondary balance beam, a hook head assembly, a cross beam, a connecting frame, a pin shaft and a pulley yoke, the pulley yoke comprises a pulley yoke side plate and a connecting plate, the pulley yoke side plate is arranged at the upper part of the pulley yoke, the connecting plate is arranged at the lower part of the pulley yoke, and the pulley yoke side plate and the connecting plate are connected through welding; the connecting plate is connected with the two pulley yoke side plates, and the two pulley yoke side plates are symmetrically arranged with the center of the connecting plate as the center. The pulley is arranged in the center of the two pulley yoke side plates; the hook head assembly is fixed on the first-stage balance beam through a cross beam, the first-stage balance beam is connected with the second-stage balance beam through a connecting frame, and the second-stage balance beam is connected with a connecting plate on the pulley yoke through a pin shaft; the pulley yoke side plate on the pulley yoke is connected with the connecting plate at a set deflection angle, so that the steel wire rope is prevented from being abraded. According to the utility model, the stability and reliability of the lifting hook during normal lifting operation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a novel hook structure. Background Art

[0002] The hook is an important component of the tower crane, carrying the lifting operation of the entire tower crane. The quality of the hook design directly affects the working performance and lifting efficiency of the tower crane.

[0003] The traditional hook design has four independently distributed pulley blocks, each of which consists of two pulleys placed side by side, and each pulley block is controlled by a lifting mechanism and a strand of wire rope. The double-layer pulleys in each pulley block can achieve n-ratio operation, and each pulley block can work alone or in collaboration, realizing any switch from n-ratio to 4×n-ratio. However, when the existing hook scheme switches the ratio, the rear car hook needs to be raised to the bottom of the trolley for fixing. At this time, the angle between the trolley pulley and the hook pulley exceeds the standard requirement, and it is easy to cause friction between the wire rope and the pulley, resulting in wire rope damage such as twisting or even loose strands, which is not conducive to the normal use of the wire rope and pulley. Utility Model Content

[0004] The utility model aims to provide a novel hook structure, which reduces the problems of wire rope damage such as twisting or even loose strands by welding a pulley block with a certain angle.

[0005] The utility model adopts the following technical solution: a new type of hook structure is proposed, including:

[0006] Pulley, primary balance beam, secondary balance beam, hook assembly, cross beam, connecting frame, pin shaft and pulley frame.

[0007] The pulley is arranged on the pulley frame, the hook assembly is fixed on the primary balance beam through a cross beam, the primary balance beam is connected to the secondary balance beam through a connecting frame, the secondary balance beam is connected to the pulley frame through a pin shaft, and the pulley frame is arranged at a set deflection angle to prevent wear of the wire rope.

[0008] Furthermore, both ends of the primary balance beam are connected to the secondary balance beam through a connecting frame, and the two secondary balance beams are symmetrically arranged with the center of the primary balance beam as the center.

[0009] Furthermore, both sides of the secondary balance beam are connected to the pulley frames through pins, and the two pulley frames are symmetrically arranged with the center of the secondary balance beam as the center.

[0010] Furthermore, the pulley frame includes a pulley frame side plate and a connecting plate, the pulley frame side plate is arranged on the upper part of the pulley frame, the connecting plate is arranged on the lower part of the pulley frame, and the pulley frame side plate and the connecting plate are connected by welding.

[0011] Furthermore, the pulley frame includes two pulley frame side plates and a connecting plate, and the two pulley frame side plates are symmetrically arranged with the center of the connecting plate as the center.

[0012] Furthermore, the pulley is arranged at the center position of the two pulley frame side plates.

[0013] Furthermore, the secondary balance beam is connected to a connecting plate on the pulley frame via a pin shaft.

[0014] Furthermore, the pulley frame side plate on the pulley frame is connected to the connecting plate at a set deflection angle. The deflection angle cannot be greater than 2°.

[0015] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0016] The utility model can reduce the friction of the wire rope on the pulley, ensure the safety performance of the wire rope during the hook lifting operation, effectively solve the problem of the wire rope being tangled or even scattered due to the friction between the wire rope and the pulley, and improve the stability and reliability of the hook during normal lifting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the utility model.

[0018] Figure 2 It is a left view of the utility model.

[0019] Figure 3 It is a top view of the utility model.

[0020] Figure 4 The utility model is a schematic diagram of a single-arm double-trolley tower crane.

[0021] Figure identification: 1- pulley; 2- primary balance beam; 3- secondary balance beam; 4- hook assembly; 5- cross beam; 6- connecting frame; 7- pin shaft; 8- pulley frame side plate; 9- connecting plate. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0023] To achieve the above purpose, the utility model proposes a new type of hook structure, such as Figure 1 , 2 and 3, including:

[0024] Pulley 1, primary balance beam 2, secondary balance beam 3, hook assembly 4, cross beam 5, connecting frame 6, pin shaft 7 and pulley frame.

[0025] The pulley 1 is arranged on the pulley frame, the hook assembly 4 is fixed on the primary balance beam 2 through the cross beam 5, the primary balance beam 2 is connected to the secondary balance beam 3 through the connecting frame 6, the secondary balance beam 3 is connected to the pulley frame through the pin 7, and the pulley frame is set at a set deflection angle to prevent wear of the wire rope.

[0026] Both ends of the primary balance beam 2 are connected to the secondary balance beam 3 through a connecting frame 6 , and the two secondary balance beams 3 are symmetrically arranged with the center of the primary balance beam 2 as the center.

[0027] Both sides of the secondary balance beam 3 are connected to the pulley frames through the pin shaft 7, and the two pulley frames are symmetrically arranged with the center of the secondary balance beam 3 as the center.

[0028] The pulley frame includes a pulley frame side plate 8 and a connecting plate 9. The pulley frame side plate 8 is arranged on the upper part of the pulley frame, and the connecting plate 9 is arranged on the lower part of the pulley frame. The pulley frame side plate 8 and the connecting plate 9 are connected by welding.

[0029] The pulley frame includes two pulley frame side plates 8 and a connecting plate 9 , and the two pulley frame side plates 8 are symmetrically arranged with the center of the connecting plate 9 as the center.

[0030] The pulley 1 is arranged at the center position of two pulley frame side plates 8 .

[0031] The secondary balance beam 3 is connected to the connecting plate 9 on the pulley frame through a pin shaft 7.

[0032] The pulley frame side plate 8 on the pulley frame is connected to the connecting plate 9 at a set deflection angle α. The deflection angle α cannot be greater than 2°.

[0033] The four pulleys on the new hook structure proposed by the utility model correspond to four trolleys respectively, and are controlled by two independent lifting mechanisms, and can be used for double-arm four-trolley tower cranes. When the hook structure is performing hoisting operations, the lifting wire rope is wound around the trolley and the pulley respectively. During normal operation, the wire rope operates vertically; when the ratio is switched, only the front trolley and the hook pulley block perform hoisting operations, and the rear trolley hook pulley block will be lifted to the top. Since the side plates of the pulley frame are deflected at a certain angle, the wear of the wire rope can be reduced, ensuring the safety of the hoisting operation.

[0034] The new hook structure proposed in the utility model can also be used on a single-arm double-trolley tower crane, such as Figure 4 When performing hoisting operations, the deflection angle of the pulley frame can also ensure that the wire rope can operate vertically, reducing wear on the wire rope.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A new type of hook structure, characterized in that: include: A pulley (1), a primary balance beam (2), a secondary balance beam (3), a hook assembly (4), a cross beam (5), a connecting frame (6), a pin shaft (7) and a pulley frame; The pulley (1) is arranged on a pulley frame, the hook assembly (4) is fixed on a primary balance beam (2) through a cross beam (5), the primary balance beam (2) is connected to a secondary balance beam (3) through a connecting frame (6), the secondary balance beam (3) is connected to the pulley frame through a pin shaft (7), and the pulley frame is arranged to set a deflection angle.

2. The novel hook structure according to claim 1 is characterized in that: Both ends of the primary balance beam (2) are connected to the secondary balance beam (3) via a connecting frame (6), and the two secondary balance beams (3) are symmetrically arranged with the center of the primary balance beam (2) as the center.

3. The novel hook structure according to claim 2 is characterized in that: Both sides of the secondary balance beam (3) are connected to the pulley frames through pins (7), and the two pulley frames are symmetrically arranged with the center of the secondary balance beam (3) as the center.

4. The novel hook structure according to claim 1 is characterized in that: The pulley frame comprises a pulley frame side plate (8) and a connecting plate (9), wherein the pulley frame side plate (8) is arranged at the upper part of the pulley frame, and the connecting plate (9) is arranged at the lower part of the pulley frame, and the pulley frame side plate (8) and the connecting plate (9) are connected by welding.

5. The novel hook structure according to claim 4 is characterized in that: The pulley frame comprises two pulley frame side plates (8) and a connecting plate (9), and the two pulley frame side plates (8) are symmetrically arranged with the center of the connecting plate (9) as the center.

6. The novel hook structure according to claim 4 is characterized in that: The pulley (1) is arranged at the center position of two pulley frame side plates (8).

7. The novel hook structure according to claim 4 is characterized in that: The secondary balance beam (3) is connected to a connecting plate (9) on the pulley frame via a pin shaft (7).

8. The novel hook structure according to claim 4 is characterized in that: The pulley frame side plate (8) on the pulley frame is connected to the connecting plate (9) at a set deflection angle.

9. The novel hook structure according to claim 8 is characterized in that: The deflection angle is less than or equal to 2°.

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