Arm lifting mechanism and crane

Abstract

The utility model discloses an arm lifting mechanism and a crane, the arm lifting mechanism comprises a super-lifting mast and a crane arm, a main arm bottom section arm of the crane arm is connected with a lifting steel wire rope, the lifting steel wire rope passes through the top of the super-lifting mast and then enters an auxiliary arm guide pulley block of a fixed auxiliary arm bracket, and the lifting steel wire rope passes through an arm head of the fixed auxiliary arm and then is fixed on the main arm bottom section arm; an auxiliary crane lifting rope is arranged at the arm head of the fixed auxiliary arm; and a tension sensor is arranged at the joint of the main arm bottom section arm and the lifting steel wire rope. According to the utility model, the problem that a long arm support is difficult to lift is solved; and the luffing performance of the crane is greatly improved with lower cost.

Description

Technical Field

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

[0002] The main components of the superlift luffing system of existing crawler cranes include: superlift mast, superlift luffing winch, luffing wire rope, and tie plate. The superlift luffing winch winds up the luffing wire rope, which drives the tie plate to raise the boom to the working angle, completing the boom raising process.

[0003] As the scale of infrastructure projects such as wind power installations in my country grows larger, the performance requirements for crawler cranes are becoming increasingly stringent. Consequently, the boom length and weight are constantly increasing, placing higher demands on the boom-raising capacity of crawler cranes. Boom raising of crawler cranes is primarily achieved through the luffing system. When the boom is long, raising the boom using the existing luffing system becomes quite difficult. To ensure smooth boom raising, the luffing winch needs to provide greater slewing force. Simultaneously, higher specifications need to be selected for wire ropes, tie plates, and other components to prevent breakage during boom raising. These factors lead to a significant increase in the overall cost and weight of the crane.

[0004] Therefore, it is necessary to develop new types of boom lifting mechanisms and cranes to solve the problem of difficulty in lifting long booms, while reducing the cost and weight of the entire machine. Utility Model Content

[0005] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a boom lifting mechanism and a crane to solve the problem of difficulty in lifting long booms; and significantly improves the luffing performance of the crane at a lower cost.

[0006] Technical solution: The present invention relates to a boom lifting mechanism, characterized in that it includes a super-lifting mast and a lifting boom, the main boom bottom section of the lifting boom is connected to a lifting wire rope, the lifting wire rope passes through the top of the super-lifting mast and enters the auxiliary boom guide pulley group of the fixed auxiliary boom support, the lifting wire rope passes through the fixed auxiliary boom head and is fixed to the main boom bottom section; an auxiliary crane lifting rope is provided at the fixed auxiliary boom head; a tension sensor is provided at the connection between the main boom bottom section and the lifting wire rope.

[0007] The superlift mast bottom section arm is equipped with a superlift luffing winch.

[0008] The top of the super-lift mast is connected to the boom head of the crane via luffing wire ropes and tie plates.

[0009] The auxiliary crane lifting rope is connected to the hook.

[0010] The auxiliary crane lifting rope is used as a traction wire rope.

[0011] The super-lift mast and lifting boom are located on the crane.

[0012] Cranes using the boom mechanism of this invention.

[0013] Beneficial Effects: Compared with existing technologies, this utility model has the following significant advantages: By changing the direction of the hoisting wire rope, this utility model utilizes the hoisting wire rope to provide additional luffing force, thereby achieving the goal of increasing the luffing capacity of a crawler crane at a lower cost. It utilizes the existing hoisting mechanism of the crawler crane to provide additional luffing force, retaining the original luffing winch, wire rope, and tie plate, etc., without requiring significant modifications to the original structure. It achieves a smooth boom raising effect with a longer boom at a lower cost, and the boom raising method is simple and easy to implement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] In the diagram, 1 is the super-lift mast; 2 is the super-lift luffing winch; 3 is the luffing wire rope; 4 is the auxiliary crane lifting rope; 5 is the tie plate; 6 is the lifting wire rope; 7 is the boom; 8 is the fixed jib support; 9 is the jib guide pulley block; and 10 is the main boom bottom section. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] The boom mechanism of this utility model includes a super-lifting mast 1 and a lifting boom 7. The main boom bottom section 10 of the lifting boom 7 is connected to a lifting wire rope 6. The lifting wire rope 6 passes through the top of the super-lifting mast 1 and enters the auxiliary boom guide pulley group 9 of the fixed auxiliary boom support 8. The lifting wire rope 6 passes through the fixed auxiliary boom head and is fixed to the main boom bottom section 10. An auxiliary crane lifting rope 4 is provided at the fixed auxiliary boom head. A tension sensor is provided at the connection between the main boom bottom section 10 and the lifting wire rope 6. A super-lifting luffing winch 2 is installed inside the bottom section of the super-lifting mast 1. The top of the super-lifting mast 1 is connected to the boom head of the lifting boom 7 via a luffing wire rope 3 and a pull plate 5. The auxiliary crane lifting rope 4 is connected to the hook. The auxiliary crane lifting rope 4 serves as a traction wire rope. The super-lifting mast 1 and the lifting boom 7 are located on a crane.

[0018] This invention improves the luffing capacity of a crawler crane at a lower cost by changing the direction of the hoisting wire rope and utilizing the additional luffing force provided by the hoisting wire rope. The specific operation is as follows:

[0019] 1) After the hoisting wire rope 6 passes through the upper part of the super-lifting mast 1 and enters the auxiliary boom guide pulley group 9 of the fixed auxiliary boom bracket 8, the hoisting wire rope 6 is fixed to the main boom bottom section boom 4 and is equipped with a tension sensor to monitor the force on the hoisting wire rope in real time.

[0020] 2) Use the auxiliary crane lifting rope 10 as a traction wire rope (the traction wire rope can also be used if it is long enough) to complete the winding of the hook and lifting pulley block with the corresponding ratio.

[0021] 3) When raising the boom, alternately retract the luffing wire rope 3 and the hoisting wire rope 6 to raise the boom to the working angle (the specific angle needs to be calculated in advance based on the luffing force).

[0022] 4) After the boom is raised, untie the lifting wire rope 6, slowly pull the lifting wire rope 6 towards the hook and connect it to the auxiliary crane lifting rope 10, and retract the auxiliary crane lifting rope 10 to complete the hook winding (only 2×odd multiples are allowed).

[0023] 5) The lowering process is the reverse.

[0024] This invention improves the luffing capacity of crawler cranes at a lower cost by altering the direction of the hoisting wire rope and utilizing it to provide additional luffing force. It leverages the existing hoisting mechanism of the crawler crane to provide this additional luffing force, retaining the original luffing winch, wire rope, and tie plate, without requiring significant modifications to the original structure. This allows for smooth boom raising with a longer boom at a relatively low cost, and the boom raising method is simple and easy to implement.

Claims

1. A boom lifting mechanism, characterized in that: The system includes a super-lift mast (1) and a lifting boom (7). The main boom bottom section (10) of the lifting boom (7) is connected to the lifting wire rope (6). The lifting wire rope (6) passes through the top of the super-lift mast (1) and enters the auxiliary boom guide pulley group (9) of the fixed auxiliary boom support (8). The lifting wire rope (6) passes through the fixed auxiliary boom head and is fixed to the main boom bottom section (10). An auxiliary crane lifting rope (4) is provided at the fixed auxiliary boom head. A tension sensor is provided at the connection between the main boom bottom section (10) and the lifting wire rope (6).

2. The boom lifting mechanism according to claim 1, characterized in that: The superlift mast (1) is equipped with a superlift luffing winch (2) inside the bottom section arm.

3. The boom lifting mechanism according to claim 1, characterized in that: The top of the super-lift mast (1) is connected to the boom head of the lifting arm (7) via a luffing wire rope (3) and a pull plate (5).

4. The boom lifting mechanism according to claim 1, characterized in that: The auxiliary crane lifting rope (4) is connected to the hook.

5. The boom lifting mechanism according to claim 1, characterized in that: The auxiliary crane lifting rope (4) is used as a traction wire rope.

6. The boom lifting mechanism according to claim 1, characterized in that: The super-lift mast (1) and lifting arm (7) are located on the crane.

7. A crane using the boom mechanism described in any one of claims 1-6.

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