CN223906421U

CN223906421U - Novel luffing mechanism and crane

Info

Publication number: CN223906421U
Application number: CN202520321366.2U
Authority: CN
Inventors: 朱发浩; 赫宏伟; 韩雷
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2025-02-26
Filing date: 2025-02-26
Publication date: 2026-02-13
Anticipated expiration: 2035-02-26

Abstract

This utility model discloses a novel luffing mechanism and crane, including a mast located on a turntable; a bracket is installed at the top of the mast, and a second pull plate is installed on the turntable, forming a triangular structure with the mast, bracket, and second pull plate; the top of the second pull plate is connected to a first pull plate, and the end of the first pull plate is connected to the end of the crane boom. This utility model solves the problem of difficulty in raising the crane boom when the boom is long and heavy; and improves the luffing performance of the crane at a lower cost.

Description

Novel luffing mechanism and crane

Technical Field

The utility model relates to the field of cranes, in particular to a novel luffing mechanism and a crane.

Background

Along with the development of engineering construction, the performance requirements on the crawler crane are higher and higher, the length and the weight of the arm support are increased continuously, and the higher requirements on the arm lifting capacity of the crawler crane are provided. The lifting arm of the crawler crane is mainly realized through an amplitude variation mechanism, and when the arm support is longer and heavier, the problem that the lifting arm is difficult exists by depending on the existing amplitude variation mechanism which is commonly adopted.

The luffing mechanism of the existing crawler crane mainly comprises a mast, a luffing winch, a luffing pulley block, a luffing steel wire rope, a pulling plate and the like. The luffing winch winds the luffing steel wire rope, drives the pulling plate and lifts the lifting arm to a working angle to finish the lifting arm process. Under the background that the demands of the existing longer arm support are continuously increased, the existing amplitude variation mechanism is only relied on, so that larger amplitude variation force is required to be provided for ensuring smooth arm starting, and generally, amplitude variation winches with higher specification are required to be selected, and under the condition, the cost and the weight are increased.

Therefore, a novel luffing mechanism needs to be developed in a targeted manner, so that the problem that when the arm support is long and heavy, the crane is difficult to lift is solved, and meanwhile, the cost and the weight of the crane are not greatly increased.

Disclosure of utility model

Aiming at the defects and defects of the prior art, the utility model provides the novel luffing mechanism and the crane, which solve the problem that the crane is difficult to lift when the arm support is longer and heavier, and improve the luffing performance of the crane with lower cost.

The novel luffing mechanism is characterized by comprising a mast, wherein the mast is arranged on a rotary table, a support is arranged at the top of the mast, a pulling plate II is arranged on the rotary table, the mast, the support and the pulling plate II form a triangular structure, the top of the pulling plate II is connected with the pulling plate I, and one end of the pulling plate is connected with the end of a crane boom.

The rotary table is provided with an amplitude-variable winch which is connected with an amplitude-variable steel wire rope.

The end of the amplitude steel wire rope is connected with the top of the mast.

Wherein the lifting arm is connected with the turntable.

A crane uses the novel luffing mechanism of the utility model.

Compared with the prior art, the utility model has the advantages that the utility model can achieve the smooth arm lifting effect of the longer arm with less cost under the condition of less change of the original amplitude changing mechanism of the crawler crane, and has simple operation and easy realization.

Drawings

FIG. 1 is a schematic view of a prior art horn;

FIG. 2 is a schematic diagram of the structure of the present utility model;

in the figure, 1 is a mast; the variable amplitude winch is 2, the variable amplitude pulley block is 3, the variable amplitude steel wire rope is 4, the pull plate is 5, the lifting arm is 6, the pull plate is 7, the support is 8, and the rotary table is 9.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and the specific embodiments.

The arm support is used for supporting the suspended load and can keep a certain lifting height and amplitude with a crane host. The main arm is hinged with the turntable and is used for supporting a load to lift and a member capable of changing amplitude. The boom lifting is that the crawler crane lifts the boom from the ground by a certain angle during assembly, and is called as a boom lifting. The amplitude changing mechanism is used for changing the angle between the arm support and the ground, and consists of an amplitude changing mast, a winch, a steel wire rope, a pulling plate and the like, wherein the super-lifting mast is one of the amplitude changing masts, and the winch can be arranged on the turntable or inside the super-lifting mast.

As shown in figure 1, the luffing mechanism in the prior art comprises a mast 1, a luffing winch 2, a luffing pulley block 3, a luffing steel wire rope 4, a pulling plate one 5 and the like. The luffing winch 2 is provided with a luffing pulley block 3, and the luffing winch 2 winds the luffing steel wire rope 4 to drive the first pulling plate 5 to lift the lifting arm 6 to a working angle so as to finish the arm lifting process.

As shown in fig. 2, the luffing mechanism of the utility model removes luffing pulley block 3 and adds a pulling plate II 7 and a bracket 8. The novel amplitude changing mechanism comprises a mast 1, wherein the mast 1 is positioned on a rotary table 9, a support 8 is arranged at the top of the mast 1, a pulling plate II 7 is arranged on the rotary table 9, the mast 1, the support 8 and the pulling plate II 7 form a triangular structure, the top of the pulling plate II 7 is connected with a pulling plate I5, and the end part of the pulling plate I5 is connected with the end part of a crane boom 6. The rotary table 9 is provided with an amplitude-variable winch 2, and the amplitude-variable winch 2 is connected with an amplitude-variable steel wire rope 4. The end of the amplitude steel wire rope 4 is connected with the top of the mast 1. The boom 6 is connected to a turntable 9. The crane provided by the utility model uses the novel luffing mechanism.

According to the utility model, the included angle between the first pulling plate 5 and the lifting arm 6 is increased, so that the amplitude variation force provided by the amplitude variation winch 2 is distributed to the lifting arm 6 more, and the amplitude variation process is smoothly completed. The concrete implementation method comprises the steps of installing or welding a bracket 8 on the top of the mast 1, and connecting the top of the bracket 8 with the bottom of the mast 1 or a turntable 9 by using a second pull plate 7.

The utility model can achieve the smooth arm lifting effect of the longer arm with less cost under the condition of less change of the original amplitude changing mechanism of the crawler crane, and has simple operation and easy realization.

Claims

1. A novel amplitude variation mechanism is characterized by comprising a mast (1), wherein the mast (1) is positioned on a rotary table (9), a support (8) is arranged at the top of the mast (1), a second pull plate (7) is arranged on the rotary table (9), the mast (1), the support (8) and the second pull plate (7) form a triangular structure, the top of the second pull plate (7) is connected with the first pull plate (5), and the end of the first pull plate (5) is connected with the end of a crane boom (6).

2. The novel luffing mechanism according to claim 1, wherein the luffing winch (2) is arranged on the turntable (9), and the luffing winch (2) is connected with the luffing steel wire rope (4).

3. The novel luffing mechanism as claimed in claim 2, wherein the end part of the luffing steel wire rope (4) is connected with the top of the mast (1).

4. The novel luffing mechanism as claimed in claim 1, wherein the boom (6) is connected to a turntable (9).

5. A crane comprising a novel luffing mechanism according to any of claims 1 to 4.