CN222612812U

CN222612812U - A new structure luffing system

Info

Publication number: CN222612812U
Application number: CN202420579491.9U
Authority: CN
Inventors: 邓永泉; 崔丹丹; 黄东迪
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2024-03-25
Filing date: 2024-03-25
Publication date: 2025-03-14
Anticipated expiration: 2034-03-25

Abstract

The utility model discloses a new structure luffing system, wherein a support frame for a luffing pulley block for increasing height is arranged on a herringbone frame, a connecting pull plate is arranged between the herringbone frame and the lower luffing pulley block, and the support frame is connected to the herringbone frame and the connecting pull plate through a luffing rope. The utility model can increase the force arm of the tension component of the luffing system, optimize its weight and cost, and reduce the axial force of the main arm, thereby improving the performance of the crane.

Description

Novel structure amplitude changing system

Technical Field

The utility model relates to the field of cranes, in particular to a luffing system with a novel structure.

Background

The realization of the luffing of the crane boom requires the close matching of all parts of the luffing system, including a guy rope/pulling plate, a luffing pulley block, a propeller strut, a steel wire rope and the like. The specific form of the luffing system is various, wherein one common form of the small-tonnage crane is a form of a guy cable (pulling plate), a luffing pulley block and a lambdoidal frame. The triangle formed by the propeller strut, the luffing pulley block, the luffing rope, the inhaul cable (pulling plate) and the main arm is the most important force system triangle relation of the crane, and the higher the propeller strut is, the larger the force arm of the luffing system tension component is, the smaller the stress is, and the smaller the axial force of the main arm is. However, due to the requirements of transportation economy and operation convenience, the crane transportation needs to save transportation vehicles, wherein the main frame is transported together with the propeller strut and the main arm bottom section arm, the propeller strut needs to be leveled at this moment, and the main frame transportation length is limited, so that the height size of the propeller strut is limited, and the force system matching of the crane is affected.

Therefore, a new structure luffing system needs to be developed specifically, the weight and the cost of the luffing system are optimized, and meanwhile, the axial force of a main arm is reduced, so that the performance of the crane is improved.

Disclosure of utility model

Aiming at the defects and shortcomings of the prior art, the utility model provides the luffing system with the novel structure, which can increase the tension component arm of the luffing system, optimize the weight and the cost, reduce the axial force of the main arm and further improve the performance of the crane.

The novel structure amplitude changing system is characterized in that a support frame for an increased amplitude changing pulley block is arranged on a herringbone frame, a connecting pulling plate is arranged between the herringbone frame and a lower amplitude changing pulley block, and the support frame is connected with the herringbone frame and the connecting pulling plate through amplitude changing ropes.

The luffing rope penetrates through the luffing winch and sequentially penetrates through the first guide wheel and the second guide wheel.

The first guide wheel is arranged on the herringbone frame, and the second guide wheel is arranged on the lower amplitude pulley block.

The lower luffing pulley block is connected with the upper luffing pulley block through a luffing steel wire rope, and the upper luffing pulley block is connected with a main arm of the crane through a pulling plate.

Wherein, the connection pulling plate is a pulling plate or a inhaul cable structure.

Wherein, the pulling plate is a pulling plate or a inhaul cable structure.

Compared with the prior art, the propeller strut has the advantages that the propeller strut is connected with the lower luffing pulley block through the pull plate and the supporting structure, the pull plate is connected with the luffing pulley block hinge point and the propeller strut pulley shaft, the supporting structure hinge point is arranged, one end of the supporting structure is hinged on the propeller strut, and the other end of the supporting structure is connected with the pull plate. The tension component arm of the luffing system can be increased, the weight and the cost of the luffing system are optimized, and meanwhile, the axial force of the main arm is reduced, so that the performance of the crane is improved.

Drawings

FIG. 1 is a schematic structural view of a prior art luffing system;

FIG. 2 is a schematic view of the luffing system of the present utility model;

FIG. 3 is a schematic view of the structure of the support frame and the connecting pull plate according to the present utility model;

FIG. 4 is a schematic diagram of a connection structure of a first guide wheel and a second guide wheel according to the present utility model;

FIG. 5 is a schematic view of a second guide wheel according to the present utility model;

In the figure, a lambdoidal frame is shown as 1, a lower luffing pulley block is shown as 2, a luffing steel wire rope is shown as 3, an upper luffing pulley block is shown as 4, a pulling plate is shown as 5, a main arm of a crane is shown as 6, a supporting frame is shown as 7, a connecting pulling plate is shown as 8, a luffing rope is shown as 9, a first guide wheel is shown as 10, a second guide wheel is shown as 11, and luffing winch is shown as 12.

Detailed Description

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

According to the luffing system with the novel structure, the support frame 7 for the luffing pulley block for heightening is arranged on the herringbone frame 1, the connecting pull plate 8 is arranged between the herringbone frame 1 and the lower luffing pulley block 2, and the support frame 7 is connected with the herringbone frame 1 and the connecting pull plate 8 through the luffing rope 9. The luffing rope 9 passes through the luffing winch 12 and sequentially passes through the first guide wheel 10 and the second guide wheel 11. The first guide wheel 10 is arranged on the propeller strut 1, and the second guide wheel 11 is arranged on the lower luffing pulley block 2. The lower luffing pulley block 2 is connected with the upper luffing pulley block 4 through a luffing steel wire rope 3, and the upper luffing pulley block 4 is connected with a main arm 6 of the crane through a pulling plate 5. The connecting pull plate 8 is in a pull plate or inhaul cable structure. The pulling plate 5 is a pulling plate or a pulling rope structure.

The utility model realizes the increase of the tension component arm of the luffing system by adding the luffing pulley block supporting structure on the propeller strut 1, and is characterized in that the propeller strut 1 is provided with the supporting structure (the supporting frame 7), the connecting pull plate 8 between the propeller strut 1 and the lower luffing pulley block 2 is lengthened, and the working height of the luffing pulley block can be increased only by connecting the supporting structure with the propeller strut 1 and the mounting holes on the connecting pull plate 8 during working, thereby realizing the increase of the tension component arm of the luffing system. By adopting the structure, the variable amplitude steel wire rope guide pulley is required to be added, specifically, the variable amplitude rope 9 is led out of the variable amplitude winch 12, and the steel wire rope is wound through the herringbone frame rope first guide pulley 10 and the lower variable amplitude pulley block 2 upper second guide pulley 11.

The utility model can realize the increase of the tension arm of the tension component of the amplitude changing system, thereby increasing the lifting capacity of the crawler crane, and maintaining the original transportation economy and the disassembly and assembly convenience without changing the transportation mode of the crawler crane.

Claims

1. A luffing system with a novel structure is characterized in that a support frame (7) for an elevated luffing pulley block is arranged on a herringbone frame (1), a connecting pull plate (8) is arranged between the herringbone frame (1) and a lower luffing pulley block (2), and the support frame (7) is connected with the herringbone frame (1) and the connecting pull plate (8) through luffing ropes (9).

2. The luffing system with the novel structure as claimed in claim 1, wherein the luffing rope (9) passes through the luffing winch (12) and sequentially passes through the first guide wheel (10) and the second guide wheel (11).

3. The luffing system of claim 2, wherein the first guide wheel (10) is mounted on a propeller strut (1) and the second guide wheel (11) is mounted on a lower luffing pulley block (2).

4. The luffing system with the novel structure as claimed in claim 1, wherein the lower luffing pulley block (2) is connected with the upper luffing pulley block (4) through a luffing steel wire rope (3), and the upper luffing pulley block (4) is connected with a main arm (6) of the crane through a pulling plate (5).

5. The luffing system of claim 1, wherein said connecting panel (8) is a panel or cable structure.

6. The luffing system of claim 4, wherein the pulling plate (5) is a pulling plate or a pulling rope structure.