CN104355245B - Independent arm head and crane - Google Patents

Abstract

The invention discloses an independent jib head, comprising: a connecting frame (1), used for connecting a main boom (5); Set the key point of hanging; the luffing mechanism is arranged between the connecting frame (1) and the rotating frame (2), and is used to adjust the angle of the rotating frame (2) relative to the connecting frame (1); the bracket (4) , which is hinged with the connecting frame (1) and is used to support the connecting piece of the airfoil bracket. The independent jib head installed on the main jib end section can not only increase the lifting height and range, but also meet the strong lifting performance requirements, and the structure has small wind resistance, quick installation, easy disassembly, safety and reliability, and its performance It is especially suitable for the wind power industry and can be used as a variable amplitude independent boom head for wind power.

Description

A kind of independent jib head and crane

technical field

The invention relates to the technical field of engineering machinery, in particular to an independent arm head of an ultra-large crane. The invention also relates to a crane provided with said jib head.

Background technique

The boom is a necessary operating part of the construction crane. This kind of crane is very heavy. Due to the limitation of the axle load and the layout of the whole vehicle, the telescopic length of the main boom of the crane is limited, and the lifting point of the boom head is very far away from the barrel of the main boom. Recently, in some occasions, especially when wind turbines are installed and disassembled, the performance, height and width of the main boom have certain limitations, or the height and width are satisfactory but will interfere with the head of the last boom, resulting in installation And the disassembly work is very difficult, even can't lift heavy.

That is to say, in working conditions such as wind power use, a certain height, range and high lifting performance are required. However, it cannot meet the requirements of safe and quick installation of all wind power facilities.

With the development of super-large tonnage cranes and market demand, different forms of independent jib structures for wind power have emerged for different use environments and operating conditions, which are installed on the last section of the main boom to achieve the height and amplitude of wind power hoisting supplement.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of an existing independent jib head of a crane.

As shown in the figure, the truss-type independent arm head adopts the structural form of a connecting frame plus a "goose head", which is mainly composed of a connecting frame assembly 1', an arm head assembly 2', a pull plate assembly 3', and a rope guide pulley 4' And the pulley block 5', etc., the connecting frame assembly 1' is used to connect the main boom, the arm head assembly 2' is docked with the connecting frame assembly 1', and its end protrudes forward for a certain distance, so as to keep the lifting point away from the The barrel of the main boom.

Although this independent jib head can increase the lifting height and range to a certain extent, it still has the following shortcomings: first, the lifting performance of the structure is weak; second, the overall force distribution of the structure is uneven; third, This structure cannot be changed in amplitude and cannot meet the needs of different working conditions in wind power hoisting. Fourth, the super-lift position on the jib head is connected to the front and is low, and only the upper part cannot effectively protect the entire jib head structure.

It can be seen that in order to meet the needs of large-scale equipment installed at high places such as wind turbines, it is necessary to have strong lifting performance within a certain height and amplitude range. However, the contradiction between the addition of height and amplitude and the high lifting performance requirements A difficult point in the header design process. .

Therefore, how to make the independent jib head not only increase the lifting height and range, but also have higher lifting performance is a technical problem to be solved by those skilled in the art.

Contents of the invention

The object of the present invention is to provide an independent arm head. Installing the independent jib head on the main jib end section can not only increase the lifting height and range, but also meet the strong lifting performance requirements, and has small structural wind resistance, quick installation, convenient disassembly, safety and reliability.

Another object of the present invention is to provide a crane provided with said independent jib head.

To achieve the above object, the present invention provides an independent arm head, comprising:

Connecting frame for connecting the main boom;

The swivel frame is hinged and protrudes from the connecting frame, and a lifting point is arranged on it;

The luffing mechanism is arranged between the connecting frame and the rotating frame, and is used to adjust the angle of the rotating frame relative to the connecting frame;

The airfoil support is hinged with the connecting frame and is used to support the connecting piece of the airfoil support.

Preferably, the front end of the connecting frame is an oblique end, the rotating frame is hinged to the lower end of the oblique end, and the luffing mechanism is arranged between the upper end of the oblique end and the rotating frame.

Preferably, the swivel frame has a triangular shape on the side, its first hinge point is hinged to the lower end of the inclined end, the second hinge point is connected to the upper end of the inclined end through a luffing mechanism, and the third hinge Point mounted pulley blocks form the lifting point.

Preferably, the triangle is a right-angled triangle or an obtuse-angled triangle, and its second hinge point is a right-angled hinge point or an obtuse-angled hinge point.

Preferably, the luffing mechanism is a luffing pull plate or a hydraulic cylinder with adjustable connection length.

Preferably, a first rope guide pulley is provided at the upper end of the airfoil support, and a second rope guide pulley is provided at the upper end of the oblique end of the connecting frame.

Preferably, the bracket is located above the connecting frame and is hinged to the rear end of the connecting frame, and in working state, it is inclined to the front end of the connecting frame.

Preferably, the connecting member of the wing bracket includes a front pull plate of the wing bracket and a rear pull plate of the wing bracket; one end of the front pull plate of the wing bracket is connected to the upper end of the wing bracket, and the other end is connected to the connecting The end of the frame; one end of the rear pull plate of the wing support is connected to the upper end of the wing support, and the other end is connected to the front end of the super-lifting device.

Preferably, in the transportation state, the airfoil support, the front drawing plate of the airfoil support and the rear drawing plate of the airfoil support are folded together and placed on the connecting frame as a whole.

Preferably, in the transport state, the second hinge point of the swivel frame is hinged to the retractable hinge point on the upper rear side of the luffing stay plate.

Preferably, the airfoil support and the connecting frame are fixed by connecting lugs and pin shafts, and the front pull plate of the airfoil support is supported on the bracket of the connecting frame.

In order to achieve the above-mentioned second purpose, the present invention provides a crane, including a crane body, a main boom, and a jib mechanism arranged at the last section of the main jib, and the jib mechanism is as described in any one of the above-mentioned independent arm.

The arm head provided by the present invention is a variable amplitude independent arm head. Compared with the integral fixed independent arm head, it is divided into two parts: a connecting frame and a rotating frame. The rotating frame is hinged with the connecting frame and can rotate relative to the connecting frame. , when in use, the angle of the rotating frame can be adjusted through the luffing mechanism according to actual needs, so as to meet the requirements of lifting height and amplitude under different working conditions in wind power hoisting and other operations. The connecting frame is hinged and can be opened upward or retracted downward. Under its support, the stress state of the arm head and the main arm can be significantly improved, and the force of the arm head is more reasonable. It can not only increase the strength of the independent arm head and the main arm. Strength, lifting capacity and stability, and can effectively protect the entire jib structure. Its performance is especially suitable for the wind power industry, and can be used as a variable amplitude independent jib for wind power.

The crane provided by the present invention is provided with the above-mentioned independent jib head. Since the independent jib head has the above-mentioned technical effects, the crane provided with the independent jib head should also have the same technical effect.

Description of drawings

Fig. 1 is the structural representation of existing crane independent jib head;

Fig. 2 is the structural representation of independent arm head provided by the present invention;

Fig. 3 is a structural schematic diagram of the independent arm head shown in Fig. 2 when it is in a transport state;

Fig. 4 is a partial enlarged view of part A in Fig. 3;

Fig. 5 is a partially enlarged view of part B in Fig. 3;

Fig. 6 is a partially enlarged view of part C in Fig. 3;

Fig. 7 is a reference diagram of the use state of the independent arm head provided by the present invention.

In Figure 1:

Connecting frame assembly 1' Arm head assembly 2' Pull plate assembly 3' Guide rope pulley 4' Pulley block 5'

In Figure 2 to Figure 7:

1. Connecting frame 2. Rotating frame 21. First hinge point 22. Second hinge point 23. Third hinge point 3. Luffing plate 31. Pin shaft 33. Retractable hinge point 4. Bracket 5. Main lifting Arm 6. Pulley group 7. Front pull plate of airfoil bracket 8. Rear pull plate of airfoil bracket 9. Superlift device 11. First rope pulley 12. Second rope pulley 13. Lug 14. Fixed pin 15. Bracket 16. Clip

detailed description

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 2 , which is a schematic structural diagram of the independent arm head provided by the present invention.

As shown in the figure, in a specific embodiment, the independent arm head provided by the present invention is mainly composed of a connecting frame 1, a rotating frame 2, a luffing mechanism, a bracket 4, etc., which are used to lift the main boom 5. performance, it can be directly or through the fixed jib connecting frame connected to the head of the main jib 5 (the structural part that mainly bears the weight in hoisting operation of the hoisting machinery) the head of the last jib, so as to carry out the working condition of the crane.

The connecting frame 1, the rotating frame 2 and the bracket 4 are all truss structures, wherein the connecting frame 1 and the rotating frame 2 are three-dimensional trusses, the bracket 4 is a plane truss, and the luffing mechanism is a luffing plate 3 with adjustable connection length.

The rear end of the connecting frame 1 is provided with four hinge points for docking with the terminal arm of the main boom 5. Different from the end of the traditional jib frame, the front end of the connecting frame 1 is an oblique end with the slope facing downward. The cross-sectional size gradually decreases, and it is a right triangle in side view.

The swivel frame 2 is located below the oblique end of the connecting frame 1 and is also triangular on the side. The upper ends are connected by the luffing plate 3, the third hinge point 23 is equipped with a pulley block 6 to form a lifting point, and the connecting frame 1, the swivel frame 2, and the luffing plate 3 together form a closed triangular adjustment space. Like this, swivel frame 2 just protrudes from connecting frame 1, and its hoisting point protrudes a certain distance outwards with respect to connecting frame 1, can make hoisting point be far away from the cylinder body of main boom 5, avoid both mutual interference, to increase The working height and range of the independent arm head.

Specifically, the triangle of the rotating frame 2 may be a right triangle or an obtuse triangle, and the second hinge point 22 thereof is a right angle hinge point or an obtuse angle hinge point. Certainly, in the case of further adding a guide wheel to avoid interference between the wire rope and the jib head, the triangle of the rotating frame 2 may also be an acute triangle.

The above-mentioned hinge points are only used to describe the general position of the hinge or connection, not a geometric point in the strict sense. As long as the hinge or connection position is within a reasonable range around it, the purpose of the present invention can be achieved.

One end of the luffing plate 3 is hinged to the upper end of the inclined end of the connecting frame 1, and the other end is hinged to the second hinge point 22 of the rotating frame 2, which is mainly composed of a double-fork plate and a single-fork plate connected by a pin shaft. Multiple groups of pin holes can be set on the double-fork plate and the single-fork plate. When adjusting the connection length, first pull out the pin shaft 31, then adjust the overlapping length of the double-fork plate and the single-fork plate, and finally insert the pin shaft 31 Just insert the re-aligned pin holes. By adjusting the length of the luffing pull plate 3, the angle of the rotating frame 2 relative to the connecting frame 1 can be adjusted, thereby realizing the luffing function.

The bracket 4 is located above the connecting frame 1 and is hinged to the rear end of the connecting frame 1 to support the connecting part of the airfoil bracket. The ratio of its length to the overall length of the arm head is about 1:3-1:4. Because the root is hinged with the connecting frame 1, the support 4 can be opened upwards or folded downwards. In the opened working state, it is inclined at a certain angle to the front end of the connecting frame 1.

The airfoil support connector is divided into the front drawing plate 7 of the airfoil support and the rear drawing plate 8 of the airfoil support. The upper end of the support 4 is provided with two hinge points before and after. The front hinge point is hinged, and the other end is hinged with the end of the connecting frame 1 (that is, the upper end of the inclined end); one end of the rear pull plate 8 of the airfoil bracket is hinged with the rear hinge point of the bracket 4, and the other end is connected with the super-lifting device The front end of 9, viewed from the side, the bracket 4, the front pull plate 7 of the airfoil bracket and the top of the connecting frame 1 are also triangular. Due to the large-span design, the super-lift position is connected to the rear and is high, which can significantly strengthen the independent arm head. and the strength, lifting capacity and stability of the main arm, and the bracket 4 connects the upper and lower parts of the arm head, which can protect the entire arm head structure.

In addition, a first rope guide pulley 11 is provided at the upper end of the bracket 4, and a second rope guide pulley 12 is provided at the upper end of the oblique end of the connecting frame to guide the hoisting wire rope (not shown in the figure) from the top and front end of the connecting frame 1. To the pulley block 6 of the lifting point.

Please refer to Figure 3, Figure 4, Figure 5, and Figure 6. Figure 3 is a schematic diagram of the structure of the independent arm head shown in Figure 2 when it is in a transport state; Figure 4 is a partial enlarged view of part A in Figure 3; Figure 5 is a diagram of Figure 3 Partial enlarged view of part B in Figure 6; partial enlarged view of part C in Figure 3.

In the transportation state, the bracket 4, the front pull plate 7 of the airfoil bracket and the rear pull plate 8 of the airfoil bracket are folded together and placed on the connecting frame 1 as a whole, and the bracket 4 and the connecting frame 1 are fixed by connecting lugs 13 and fixing pins 14 , the front pull plate 7 of the airfoil bracket is supported on the bracket 15 of the connecting frame 1 to prevent danger during transportation and installation, the second hinge point 22 of the swivel frame 2 and the retractable hinge point 33 on the rear side of the upper end of the luffing pull plate 3 Hinged to prevent super-high danger during the transportation of the independent arm head, the entire independent arm head is transported separately during transportation, that is, the connecting frame 1, the rotating frame 2 and the bracket 4 do not need to be disassembled.

Please refer to FIG. 7 , which is a reference diagram of the use state of the independent arm head provided by the present invention.

During use, the independent jib head is taken as a whole, hoisted and installed at the junction of the main jib 5 heads together; The clip 16 straightens the front pull plate 7 of the airfoil support, and finally reaches the working state. The whole installation process only needs one hoisting to realize normal operation. Since the length of the luffing pull plate 3 needs to be manually adjusted, if you want to adjust the rotating frame The angle of 2 needs to be operated before raising the main boom 5.

After use, it is necessary to release the super-lifting wire rope connected to the bracket 4 slowly, adjust the front pull plate 7 of the airfoil bracket, put it into the bracket 15 and the hole of the fixed pin shaft, and penetrate the fixed pin shaft 14 and the clip 16 , and finally remove the entire independent arm head to complete the use.

The invention can quickly install the independent jib head while increasing the length of the short jib, and realize the hoisting of the wind power working condition. It has strong compression and bending resistance, and has an overhanging rotating frame structure, which can adjust the amplitude and height of the arm head. At the same time, it is designed with a bracket structure, which can directly connect the super-lifting device to the arm head to improve the lifting performance and stability. A truss-type variable-amplitude independent operating arm head dedicated to wind power, reliable in fixing, light in weight, and convenient to install and disassemble.

The above content is only a preferred solution of the present invention, and is not limited thereto. On this basis, targeted adjustments can be made according to actual needs, so as to obtain different implementation modes.

First of all, the structural form can be different, such as adopting different connection forms, assembly methods or different jib head hoisting structures and connection forms with super-lifting devices, the connecting frame can be provided with extension joints or transition joints, and the jib head can adopt plate shell structure, etc. .

Secondly, the structure of the luffing structure can be different. The above-mentioned embodiments adopt mechanical luffing of the pulling plate, and hydraulic cylinders can also be used to realize stepless luffing.

Furthermore, the position of the luffing position and the form of the force can be different. The luffing mechanism in the above embodiment is subjected to tension and performs the luffing above the rotating bracket, or it can be placed under the rotating bracket and supported between the connecting frame and the rotating frame. During the luffing, the luffing mechanism is under pressure.

Since there are many ways of possible realization, it is not necessary to give examples one by one here.

In addition to the above-mentioned truss-type independent jib head, the present invention also provides a crane, which includes a crane body, a main boom, and a jib head mechanism arranged on the last boom of the main jib. For the arm head, please refer to the prior art for other structures, which will not be repeated here.

The independent arm head and the crane provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principles and implementation modes of the present invention, and the descriptions of the above embodiments are only used to help understand the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (11)

1. A kind of independent arm head, is characterized in that, comprises: Connecting frame (1), is used for connecting main jib (5); The swivel frame (2) is hinged and protrudes from the connecting frame (1), on which a lifting point is set; The luffing mechanism is arranged between the connecting frame (1) and the rotating frame (2), and is used to adjust the angle of the rotating frame (2) relative to the connecting frame (1); a bracket (4), which is hinged to the connecting frame (1), and is used to support the connecting piece of the airfoil bracket; The front end of the connecting frame (1) is an oblique end, the rotating frame (2) is hinged at the lower end of the oblique end, and the luffing mechanism is arranged on the upper end of the oblique end and the rotating frame (2 )between. 2. The independent arm head according to claim 1, characterized in that, the swivel frame (2) is triangular on the side, and its first hinge point (21) is hinged to the lower end of the inclined end, and the second The hinge point (22) is connected with the upper end of the inclined end through a luffing mechanism, and the third hinge point (23) is equipped with a pulley block (6) to form the lifting point. 3. The independent arm head according to claim 2, characterized in that, the triangle is a right-angled triangle or an obtuse-angled triangle, and its second hinge point (22) is a right-angled hinge point or an obtuse-angled hinge point. 4. The independent jib head according to claim 2, characterized in that, the luffing mechanism is a luffing pull plate (3) or a hydraulic cylinder with adjustable connection length. 5. The independent arm head according to any one of claims 1 to 4, characterized in that, the upper end of the bracket (4) is provided with a first rope guide pulley (11), and the upper end of the oblique end of the connecting frame is provided with There is a second guide sheave (12). 6. The independent arm head according to claim 1, characterized in that, the bracket (4) is located above the connecting frame (1) and is hinged to the rear end of the connecting frame (1). The front end of the connecting frame (1) is inclined. 7. independent arm head according to claim 6, is characterized in that, described wing support connector comprises wing support front pull plate (7) and wing support rear pull plate (8); Described wing support One end of the front pull plate (7) is connected to the upper end of the support (4), and the other end is connected to the end of the connecting frame (1); one end of the rear pull plate (8) of the wing support is connected to the support (4). ), the other end connects the front end of the super lifting device (9). 8. The independent arm head according to claim 7, characterized in that, in the transport state, after the support (4), the front draw plate (7) of the wing support and the rear draw plate (8) of the wing support are folded together The whole is placed on the connecting frame (1). 9. The independent jib head according to claim 4, characterized in that, in the transport state, the second hinge point (22) of the swivel frame is connected to the retractable hinge on the rear side of the upper end of the luffing pull plate (3). Point (33) is hinged. 10. The independent arm head according to claim 8, characterized in that, the bracket (4) and the connecting frame (1) are fixed by connecting lugs (13) and fixed pins (14), and the wing bracket The front pull plate (7) is supported on the bracket (15) of the connecting frame (1). 11. A crane, comprising a crane body, a main jib, and a jib head mechanism arranged at the last section of the main jib, characterized in that, the jib head mechanism is as described in any one of claims 1 to 10. The independent arm head described above.