Novel luffing mechanism and crane

Abstract

The utility model discloses a novel luffing mechanism and a crane. The novel luffing mechanism comprises a mast which is positioned on a rotary table; a support is arranged on the top of the mast, a second pulling plate is arranged on the rotary table, and the mast, the support and the second pulling plate form a triangular structure. The top of the second pulling plate is connected with the first pulling plate, and one end of the second pulling plate is connected with the end of the cargo boom. According to the utility model, the problem that the arm of the crane is difficult to lift when the arm frame is longer and heavier is solved; and the luffing performance of the crane is improved at lower cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hoist, especially a novel amplitude variable mechanism and hoist. BACKGROUND

[0002] With the development of engineering construction, the performance requirement of crawler crane is higher and higher, the length and weight of boom are increasing, and the boom-raising ability of crawler crane is required higher. The boom-raising of crawler crane is mainly realized through the amplitude variable mechanism, when the boom is long and heavy, it is difficult to raise the boom by the existing amplitude variable mechanism.

[0003] The main components of the existing amplitude variable mechanism of crawler crane include: mast, amplitude winch, amplitude pulley block, amplitude wire rope and pull plate. The amplitude winch winds the amplitude wire rope to drive the pull plate to lift the boom to the working angle to complete the boom-raising process. Under the background of increasing demand for longer boom, only relying on the existing amplitude variable mechanism, it is necessary to provide greater amplitude force to ensure smooth boom-raising, generally a higher specification amplitude winch is needed, which will increase the cost and weight.

[0004] Therefore, it is necessary to develop a new type of amplitude variable mechanism to solve the problem of difficult boom-raising of the crane when the boom is long and heavy, while not greatly increasing the cost and weight of the crane. UTILITY MODEL CONTENT

[0005] The utility model discloses a novel amplitude variable mechanism and hoist, which solves the problem of difficult boom-raising of the crane when the boom is long and heavy, and improves the amplitude performance of the crane at a lower cost.

[0006] Technical scheme: the utility model discloses a novel amplitude variable mechanism, characterized in that: a mast is arranged on a rotary table; a support is arranged at the top of the mast; a pull plate two is arranged on the rotary table; the mast, the support and the pull plate two form a triangular structure; the top of the pull plate two is connected with a pull plate one; and the end of the pull plate one is connected with the end of a boom.

[0007] The rotary table is provided with an amplitude winch, and the amplitude winch is connected with an amplitude wire rope.

[0008] The end of the amplitude wire rope is connected with the top of the mast.

[0009] The boom is connected with the rotary table.

[0010] A hoist uses the novel amplitude variable mechanism.

[0011] Beneficial effects: compared with the prior art, the utility model has the following remarkable advantages: the utility model with less change of the original luffing mechanism of the crawler crane can achieve the smooth luffing effect of the longer arm with less cost, simple operation and easy realization. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the prior art luffing mechanism;

[0013] Figure 2 It is a structural schematic view of the utility model;

[0014] Fig. 1 is a mast; 2 is a luffing winch; 3 is a luffing pulley block; 4 is a luffing wire rope; 5 is a pull plate one; 6 is a lifting arm; 7 is a pull plate two; 8 is a support; 9 is a rotary table. DETAILED DESCRIPTION

[0015] The technical scheme of the utility model will be further described below in combination with the drawings and specific embodiments.

[0016] The arm support of the utility model: a main component of the crawler crane, also called the lifting arm, the lifting arm is used for supporting the load and keeping a certain lifting height and amplitude between the load and the main machine of the crane. The main arm: hinged with the rotary table, used for supporting the load lifting, the component can change the amplitude. The arm lifting: the arm support of the crawler crane is lifted to a certain angle from the ground during the assembly, which is called the arm lifting. The luffing mechanism: the luffing mechanism is used for changing the angle between the arm support and the ground, which is composed of the luffing mast and the winch, the wire rope, the pull plate and the like, the super-lifting mast is one kind of luffing masts, and the winch can be arranged on the rotary table or in the super-lifting mast.

[0017] As Figure 1 , the prior art luffing mechanism comprises a mast 1, a luffing winch 2, a luffing pulley block 3, a luffing wire rope 4 and a pull plate one 5. The luffing pulley block 3 is arranged, the luffing winch 2 winds the luffing wire rope 4, drives the pull plate one 5, lifts the lifting arm 6 to the working angle to complete the arm lifting process.

[0018] As Figure 2 , the luffing mechanism of the utility model removes the luffing pulley block 3 and adds the pull plate two 7 and the support 8. The novel luffing mechanism of the utility model comprises a mast 1, the mast 1 is arranged on the rotary table 9; the support 8 is arranged at the top of the mast 1, the pull plate two 7 is arranged on the rotary table 9, the mast 1, the support 8 and the pull plate two 7 form a triangular structure; the top of the pull plate two 7 is connected with the pull plate one 5, and the end of the pull plate one 5 is connected with the end of the lifting arm 6. The rotary table 9 is provided with the luffing winch 2, and the luffing winch 2 is connected with the luffing wire rope 4. The end of the luffing wire rope 4 is connected with the top of the mast 1. The lifting arm 6 is connected with the rotary table 9. The crane of the utility model uses the novel luffing mechanism of the utility model.

[0019] The utility model discloses through the angle between the pull plate one 5 and the hoist arm 6 is increased, makes the amplitude force that amplitude winch 2 provides more distribution to hoist arm 6, and the amplitude process is successfully completed. The specific implementation method is as follows: installing or welding support 8 at the top of mast 1, then using pull plate two 7 to connect the top of support 8 and the bottom of mast 1 or turntable 9.

[0020] The utility model discloses through to the amplitude mechanism of caterpillar -type crane original change less situation, with less cost can reach the smooth hoist arm effect of longer arm, simple operation, easy to realize.

Claims

1. A novel amplitude mechanism characterized by: It comprises a mast (1) which is located on a rotary table (9); a support (8) is arranged on the top of the mast (1), a second pulling plate (7) is arranged on the rotary table (9), and the mast (1), the support (8) and the second pulling plate (7) form a triangular structure; the top of the second pulling plate (7) is connected with a first pulling plate (5), and the end of the first pulling plate (5) is connected with the end of a hoisting arm (6).

2. The novel amplitude mechanism according to claim 1, characterized in that: The rotary table (9) is provided with a luffing winch (2), and the luffing winch (2) is connected with a luffing wire rope (4).

3. The novel amplitude mechanism according to claim 2, characterized in that: The end of the luffing wire rope (4) is connected with the top of the mast (1).

4. The novel amplitude mechanism as claimed in claim 1, wherein: The hoisting arm (6) is connected with the rotary table (9).

5. A crane, characterized by: The novel luffing mechanism of any one of claims 1-4 is used.

Images