CN220537373U

CN220537373U - Combined top joint arm

Info

Publication number: CN220537373U
Application number: CN202321792293.2U
Authority: CN
Inventors: 张骁骉; 杨勇; 朱发浩; 孙兴宾
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-02-27
Anticipated expiration: 2033-07-10

Abstract

The utility model discloses a combined top section arm, wherein a first lug plate and a second lug plate are arranged on the top section arm and are connected with a central pulley through a pin shaft structure; the central pulley comprises a guide pulley arranged on the shaft, a baffle is arranged on the side part of the guide pulley, and the baffle and the shaft are respectively connected with the pulley bracket. The utility model reduces the weight of the top section arm and the cost of the arm support, and avoids the idle problem of the pulley; flexible assembly of the central pulley is achieved.

Description

Combined top joint arm

Technical Field

The utility model relates to the field of hoisting machinery, in particular to a combined top knuckle arm.

Background

The top knuckle arm of the crawler crane is usually provided with a guide pulley, and the central pulley is used when a single pulley working condition is installed. However, the use frequency is lower in normal construction, which may cause the situation that the guide pulley on the top section arm support is redundant, so that the lifting and hanging capacities of the arm support are reduced, and the cost of the arm support is additionally increased.

In the prior art, a central guide pulley and other guide pulleys are mounted on the same shaft together. The length of the shaft is influenced by the gear distance of the pull plate, the shaft sleeves are arranged at the two ends and used for installing the shaft, and the shaft sleeves are welded on the main structure of the top section arm. However, in the prior art, a section of long shaft is designed, so that the pulley cannot be disassembled basically, and the central guide pulley is easy to be in an idle state under the working condition of non-single pulley, so that extra weight is added, and the purchase cost is increased. In addition, the cost of the arm support is increased by the overlong shaft and the shaft sleeves added at the two ends.

Disclosure of Invention

The utility model aims to: aiming at the defects and shortcomings of the prior art, the utility model provides a combined top section arm, which reduces the weight of the top section arm and the cost of an arm support and avoids the idle problem of a pulley; flexible assembly of the central pulley is achieved.

The technical scheme is as follows: the utility model discloses a combined top joint arm, which is characterized in that: the first lug plate and the second lug plate are arranged on the top joint arm and are connected with the central pulley through a pin shaft structure; the central pulley comprises a guide pulley arranged on the shaft, a baffle is arranged on the side part of the guide pulley, and the baffle and the shaft are respectively connected with the pulley bracket.

Wherein, the baffle is connected with the pulley bracket through bolts and washers.

The two ends of the pulley support are connected with the first lug plate and the second lug plate through pin shaft structures.

The pin shaft structure comprises a clamp and a pin shaft.

The pulley support is made of a plate.

Wherein the central pulley is connected with an external arm end pulley rope.

The first lug plate is fixedly connected with the top joint arm through a welding substance.

The beneficial effects are that: compared with the prior art, the utility model has the following remarkable advantages: according to the utility model, the central guide pulley is designed into an assembled type, so that an operator can conveniently install or detach the guide pulley under a proper working condition, and the operation is simple; the weight of the top section arm and the cost of the arm support are reduced, and the idle problem of the pulley is avoided; flexible assembly of the central pulley is realized; meanwhile, the operation is simple, convenient and quick, and the safety is high.

Drawings

FIG. 1 is a schematic view of a prior art top arm;

FIG. 2 is a schematic view of the structure of the center pulley of the present utility model;

fig. 3 is a schematic structural view of the central pulley installation state of the present utility model;

fig. 4 is a schematic view of the structure of the center pulley of the present utility model in an uninstalled state;

in the figure, 1 is a clip; 2 is a pin shaft; 3 is a baffle; 4 is a bolt; 5 is a gasket; 6 is a guide pulley; 7 is an axis; 8 is a pulley bracket; 9 is a central pulley; 10 is an arm end pulley rope; 11 is an ear plate I; and 12 is a second ear plate.

Detailed Description

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

The crawler crane of the utility model is a mobile crane which is arranged on a crawler chassis and walks by means of a crawler device. The arm support is a truss structure for lifting a weight to a certain height and amplitude.

According to the combined top joint arm, the first ear plate 11 and the second ear plate 12 are arranged on the top joint arm, and the first ear plate 11 and the second ear plate 12 are connected with the central pulley 9 through a pin shaft structure; the central pulley 9 comprises a guide pulley 6 arranged on a shaft 7, a baffle plate 3 is arranged on the side part of the guide pulley 6, and the baffle plate 3 and the shaft 7 are respectively connected with a pulley bracket 8. Wherein, baffle 3 is connected with pulley bracket 8 through bolt 4, packing ring 5. The two end parts of the pulley bracket 8 are connected with the first ear plate 11 and the second ear plate 12 through pin shaft structures. The pin shaft structure comprises a clip 1 and a pin shaft 2. The pulley bracket 8 is made of a plate material. The central pulley 9 is connected to an outer arm end pulley rope 10. The first ear plate 11 and the second ear plate 12 are fixedly connected with the top joint arm through welding substances.

In use, as shown in fig. 3, a schematic view of the combined central guide pulley mounted on the top knuckle arm is shown, and the combined central pulley is mounted on the top knuckle arm by means of a pin connection. The first and second earplates 11 and 12 are shown in fig. 3. Two lugs are welded on the top joint arm. When the single pulley is not required to be installed, the top knuckle arm is in the state shown in fig. 4. As shown in fig. 2, which is a schematic view of the central guide pulley, can be selectively assembled as desired. The guide pulley 6 is mounted on the shaft 7 and is provided with a baffle 3 for preventing the shaft from rotating circumferentially, and the baffle 3 is connected with the pulley bracket 8 through the bolt 4 and the gasket 5. The shaft 7 is arranged on a pulley bracket 8 which is formed by welding plates. Finally, the two pin shafts 2 are connected with two lug plates on the top joint arm, and the clamp 1 is used for preventing the pin shafts 2 from falling off.

Compared with the prior art in fig. 1, the combined top joint arm adopted by the utility model can avoid adopting a long shaft design, and simultaneously, two shaft sleeves welded with a main structure can be omitted. Therefore, the combined top section arm is beneficial to reducing the weight of the top section arm, improving the lifting capacity and the lifting capacity of the arm frame and reducing the cost of the arm frame.

The utility model adopts the assembled central guide pulley 6, is convenient for customization and selection, improves the performance of the arm support and reduces the extra cost; the modularized design is adopted, so that the top section arm is modularized and detached, the universality is stronger, and the later maintenance is convenient; the operation is convenient, simple and quick, the safety is high, and the transportation and the storage are convenient.

Claims

1. A combination type top knuckle arm, which is characterized in that: the first ear plate (11) and the second ear plate (12) are arranged on the top joint arm, and the first ear plate (11) and the second ear plate (12) are connected with the central pulley (9) through a pin shaft structure; the central pulley (9) comprises a guide pulley (6) arranged on the shaft (7), a baffle plate (3) is arranged on the side part of the guide pulley (6), and the baffle plate (3) and the shaft (7) are respectively connected with the pulley bracket (8).

2. The modular roof arm of claim 1, wherein: the baffle (3) is connected with the pulley bracket (8) through the bolt (4) and the gasket (5).

3. The modular roof arm of claim 1, wherein: the two end parts of the pulley bracket (8) are connected with the first ear plate (11) and the second ear plate (12) through pin shaft structures.

4. A modular roof arm as claimed in claim 3, wherein: the pin shaft structure comprises a clamp (1) and a pin shaft (2).

5. The modular roof arm of claim 1, wherein: the pulley bracket (8) is made of a plate.

6. The modular roof arm of claim 1, wherein: the central pulley (9) is connected with an external arm end pulley rope (10).

7. The modular roof arm of claim 1, wherein: the first ear plate (11) and the second ear plate (12) are fixedly connected with the top joint arm through welding substances.