Guide mechanism on third variable-amplitude arm of crane

Abstract

The utility model discloses a guide mechanism on a third variable-amplitude arm of a crane, which comprises a roller carrier, the roller carrier is provided with mounting holes for mounting a pulley plate and a pulley, the pulley plate and the pulley are assembled with the roller carrier through a pulley shaft, and the pulley shaft is provided with a clamp spring for preventing the pulley shaft from falling off. The lifting winch of the main arm is used for operation on the third variable-amplitude arm, the adaptability to the operation environment is high, and the operation requirement that the third variable-amplitude arm lifts heavy objects through a steel wire rope is met.

Description

Technical Field

[0001] This utility model relates to the field of cranes, and in particular to a guide mechanism on the third luffing boom of a crane. Background Technology

[0002] The existing crane third luffing boom does not have a mechanism to guide the hoisting winch wire rope. Ordinary booms use a fixed pulley installed on top to guide the wire rope, which does not change the guiding direction due to changes in the luffing angle. It is impossible to use the hoisting winch of the main boom on the third luffing boom, and the adaptability to the working environment is insufficient, which cannot meet the needs of lifting heavy objects with wire rope on the third luffing boom.

[0003] Therefore, it is necessary to develop a new type of guide mechanism for the third luffing boom of a crane to overcome the above problems. Utility Model Content

[0004] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a guide mechanism on the third luffing boom of a crane, which enables the use of the hoisting winch of the main boom on the third luffing boom. It has strong adaptability to the working environment and meets the needs of lifting heavy objects with wire ropes on the third luffing boom.

[0005] Technical solution: The present invention relates to a guide mechanism on the third luffing boom of a crane, characterized in that: it includes a roller frame, the roller frame is provided with mounting holes for mounting pulley plates and pulleys, the pulley plates and pulleys are assembled with the roller frame through pulley shafts, and the pulley shafts are provided with snap rings to prevent the pulley shafts from falling off.

[0006] The pulley is equipped with a bearing in the middle. The double pulley mechanism, consisting of a fixed pulley and a rotatable pulley, achieves amplitude variation through the rolling of the bearing.

[0007] The inner side of the pulley plate is equipped with a spacer to prevent the pulley from shifting on the pulley shaft.

[0008] The pulley plate is provided with mounting holes for mounting bolts.

[0009] The bolt is fitted with a bolt sleeve. The bolt is protected by the bolt sleeve in the center of the pulley plate to prevent it from being crushed and broken.

[0010] The roller frame is fixedly mounted on the third luffing boom and the third linkage mechanism of the crane.

[0011] The third luffing arm is equipped with a pulley bracket for changing the direction of the wire rope.

[0012] The steel wire rope is retracted via a winch on the main boom.

[0013] Beneficial Effects: Compared with the prior art, this utility model has the following significant advantages: This utility model expands the working range of the third luffing boom of a crane, solving the problem that the third luffing boom cannot use the hoisting winch in high-altitude, long-distance obstacle-crossing operations; by installing a guide mechanism on the third luffing boom, the crane can use the main boom hoisting winch for lifting operations, improving the crane's adaptability to the working environment. This utility model is mainly applied to folding boom cranes. Through the guide mechanism installed on the third luffing boom, the main boom hoisting winch wire rope passes through the guide on the third luffing boom, realizing the function of the third luffing boom using the hoisting winch for lifting operations. This further enables the crane to use the main boom hoisting winch in high-altitude, long-distance obstacle-crossing operations using the third luffing boom, improving the adaptability of the crane's third luffing boom to the working environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the structure of the present invention when the angle α between the main boom and the third luffing boom is less than 180°.

[0017] Figure 4 This is a schematic diagram of the structure of the present invention when the angle α between the main boom and the third luffing boom is greater than 180°.

[0018] Figure 5 This is a schematic diagram of the structure of the third luffing arm of this utility model when it is retracted and placed.

[0019] In the diagram, 1 is the roller frame; 2 is the pulley plate; 3 is the pulley; 4 is the bearing; 5 is the pulley shaft; 6 is the spacer; 7 is the bolt; 8 is the bolt sleeve; 9 is the snap ring; 10 is the third luffing boom; 11 is the third linkage mechanism; 12 is the pulley bracket; 13 is the main boom; and 14 is the winch. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 , Figure 2The guide mechanism on the third luffing boom of the crane of this utility model includes a roller frame 1. The roller frame 1 has mounting holes for mounting pulley plates 2 and pulleys 3. The pulley plates 2 and pulleys 3 are assembled to the roller frame 1 via pulley shafts 5. The pulley shafts 5 are equipped with retaining springs 9 to prevent the pulley shafts 5 from falling off. A bearing 4 is provided in the middle of the pulley 3. The double pulley mechanism, consisting of a fixed pulley and a rotatable pulley, achieves luffing through the rolling of the bearing 4. A spacer 6 is installed on the inner side of the pulley plate 2 to prevent the pulley 3 from shifting on the pulley shaft 5. The pulley plate 2 has mounting holes for mounting bolts 7. Bolt sleeves 8 are provided on the outside of the bolts 7.

[0022] like Figure 3 , Figure 4 , Figure 5 The roller frame 1 of this invention is fixedly mounted on the third luffing boom 10 and the third linkage mechanism 11 of the crane. The third luffing boom 10 is provided with a pulley bracket 12 for changing the direction of the wire rope. The wire rope is retracted by a winch 14 on the main boom 13.

[0023] This invention enables the guiding of the crane's main boom hoisting winch wire rope on the third luffing boom, and, in conjunction with the pulley bracket 11, allows the third luffing boom to perform its hoisting function. When the third luffing boom is extended, the fixing pin is pulled out, the guide mechanism is placed vertically, and the wire rope is guided to pass under the third luffing boom. When the third luffing boom is retracted, the angle of the guide mechanism is adjusted, and the guide mechanism is mounted in the center of the fixing plate to secure it. This achieves the guiding function of the wire rope on the third luffing boom while avoiding interference between the guide mechanism and the second luffing boom body when the guide mechanism is retracted.

[0024] This utility model relates to a guiding mechanism for the third luffing boom, comprising a fixed pulley and a rotatable pulley. The rotatable pulley rotates around the fixed pulley. By threading a wire rope between the fixed and rotatable pulleys, the wire rope can be guided either along the fixed pulley or the rotatable pulley. This mechanism has two forms: deployed and retracted. When the angle α between the crane's main boom and the third luffing boom is greater than 180°, the hoisting winch wire rope mounted on the main boom is guided by the fixed pulley, enabling hoisting winch operation. When the angle α between the crane's main boom and the third luffing boom is less than 180°, the hoisting winch wire rope mounted on the main boom is guided by the rotatable pulley, also enabling hoisting winch operation. This provides a solution for using the hoisting winch of the main boom on the third luffing boom of a crane.

Claims

1. A guide mechanism on a third luffing arm of a crane, characterized in that: Including the roller frame (1), the roller frame (1) is equipped with the installation pulley plate (2) and the installation hole of pulley (3), the pulley plate (2) and pulley (3) are assembled with roller frame (1) through pulley shaft (5), pulley shaft (5) is equipped with the circlip (9) for preventing pulley shaft (5) from falling.

2. Crane guide mechanism on a third luffing arm according to claim 1, characterized in that: The middle part of the pulley (3) is provided with a bearing (4), and the double pulley mechanism composed of the fixed pulley and the rotatable pulley is rolled through the bearing (4), so that the amplitude of the double pulley mechanism is changed.

3. Crane guide mechanism on a third jib arm according to claim 1, characterized in that: The inner side of the pulley plate (2) is provided with a spacer sleeve (6), which prevents the pulley (3) from translating on the pulley shaft (5).

4. Crane guide mechanism on a third luffing arm according to claim 1, characterized in that: The pulley plate (2) is provided with a mounting hole for mounting a bolt (7).

5. Crane guide mechanism on a third luffing arm according to claim 4, characterized in that: The outside of the bolt (7) is provided with a bolt sleeve (8).

6. Crane third luffing arm guide mechanism according to claim 1, characterized in that: The roller frame (1) is fixedly arranged on the third amplitude arm (10) and the third linkage mechanism (11) of the crane.

7. Crane guide mechanism on a third jib according to claim 6, characterized in that: The third amplitude arm (10) is provided with a pulley support (12) for changing the direction of the steel wire rope.

8. Crane guide mechanism on a third jib according to claim 7, characterized in that: The steel wire rope is retracted through the winch (14) on the main arm (13).

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