WO2015090109A1

WO2015090109A1 - Fly jib luffing device, crane and fly jib luffing method

Info

Publication number: WO2015090109A1
Application number: PCT/CN2014/089026
Authority: WO
Inventors: 陈林; 张晓广; 韦仕持
Original assignee: 三一汽车起重机械有限公司
Priority date: 2013-12-17
Filing date: 2014-10-21
Publication date: 2015-06-25
Also published as: CN103626058A; CN103626058B

Abstract

Disclosed are a fly jib luffing device, a crane and a fly jib luffing method. The fly jib luffing device comprises: a fixed truss boom (7A), a luffing truss boom (7B), and a luffing pulley mechanism (11), wherein the fixed truss boom (7A) is arranged at the head of a main boom of a crane, the luffing truss boom (7B) is hinged with the fixed truss boom (7A), and the luffing pulley mechanism (11) comprises a first pulley hinged with the fixed truss boom (7A) and a second pulley hinged with the luffing truss boom (7B). When the luffing pulley mechanism (11) is used to luff the fly jib (10), a luffing hoisting steel rope is wound around the luffing pulley mechanism (11). The technical solution uses the luffing pulley mechanism (11) combined with a main hoisting steel rope or an auxiliary hoisting steel rope which serves as the luffing steel rope to achieve automatic luffing of the working condition of the fly jib of the crane, saving time and energy without requiring additional electrical or hydraulic devices, and saving cost. In addition, the hoisting steel rope is pulled back simultaneously as the main boom is retracted so as to assist the retraction and decrease the pressure loading of an oil cylinder for retraction of the main boom.

Description

Auxiliary luffing device, crane and jib amplitude changing method

This application claims the priority of the Chinese patent application filed on December 17, 2013, the Chinese Patent Office, the application number 201310693620.3, and the invention titled "Aileron luffing device, crane and jib amplitude changing method", the entire contents of which are The citations are incorporated herein by reference.

Technical field

The present disclosure relates to the field of crane technology, and in particular to a jib luffing device, a crane and a jib framing method.

Background technique

Cranes typically include a main boom and a secondary boom. The secondary boom generally has a variable amplitude function.

In general, there are two main ways to achieve the variable amplitude function: mechanical luffing and automatic luffing. Among them, the mechanical luffing is an artificial initial setting of the jib of the jib, and the main jib can only perform the manual luffing operation of the sub-boom after being retracted. The advantage of this luffing method is that the cost is lower, but the problem is that the operation is troublesome. The automatic variable width is automatically adjusted by the hydraulic cylinder disposed between the jib fixed truss arm and the variable truss arm. The advantage is that the operation is convenient, labor-saving and time-saving, but the problem is high cost.

Summary of the invention

In view of this, the present disclosure proposes a jib luffing device, a crane and a jib luffing method to facilitate the luffing operation of the sub-crane arm and reduce the cost.

In a first aspect, the present disclosure discloses a jib luffing device for a luffing operation of a crane jib, comprising: a fixed truss arm of the jib, a jib arm of the jib, and a luffing pulley mechanism; Wherein the fixed truss arm is disposed at a head of the crane main boom; the variator truss arm is hinged with the fixed truss arm; and the variator pulley mechanism includes a first sliding hinged with the fixed truss arm a wheel, and a second pulley hingedly coupled to the yoke arm; when the jib is subjected to a slewing operation using the slewing pulley mechanism, the slewing hoisting wire is wound around the slewing pulley mechanism On the first pulley and the second pulley.

In some embodiments, in the above-described jib luffing device, the variable hoisting wire rope is a main hoisting wire rope or a sub-winding steel wire rope.

In some embodiments, the jib lapping device further includes: a sprocket assembly; the sprocket assembly includes a over sprocket and a sprocket; the strop is hinged to the strop The variable hoisting wire rope is wound onto the slewing pulley mechanism via the sprocket wheel.

In some embodiments, in the above-described jib luffing device, the over-the-rope carrier includes a first carrier body and a second carrier body, and the second carrier body is coupled to the middle of the first carrier body And a certain angle between the first wheel frame body and the second wheel frame body.

In some embodiments, the first pulley includes a plurality of first wheel bodies disposed side by side, the second pulley includes a plurality of second wheel bodies disposed side by side; the first wheel body and the second wheel The axes of the bodies are parallel.

In some embodiments, the jib luffing device further includes a limiting unit disposed on both sides of the slewing pulley mechanism and configured to mechanically limit the limit position of the auxiliary jib.

In some embodiments, the limiting unit in the jib luffing device is a limit pull plate assembly.

In some embodiments, in the above-mentioned jib luffing device, the limit pull plate assembly includes a first pull plate and a second pull plate, and the first pull plate is slidable relative to the second pull plate; Changing the amplitude of the auxiliary boom relative to the sliding of the second pulling plate, and after the auxiliary lifting arm reaches a given position, connecting the first pulling by pin positioning a plate and the second pull plate.

In a second aspect, the present disclosure also discloses a crane provided with the jib luffing device of any of the above.

In a third aspect, the present disclosure also discloses a jib amplitude sizing method, which is based on the above-described jib luffing device, and performs a sub-boom sag action by retracting and displacing the hoisting wire rope.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

1 is a schematic structural view of an embodiment of a secondary crane arm luffing device in the present disclosure;

Figure 2 is a perspective view showing the embodiment of the auxiliary crane arm luffing device shown in Figure 1;

Fig. 3 is a schematic view showing the state of the sub-crane arm in a variable amplitude state in the case of employing the embodiment of the sub-crane arm luffing device of the present disclosure.

Description of the reference numerals

1 hoisting hoisting wire rope

2 variable width hoisting wire rope

3 first pull plate

4 second pull plate

5 pin

7A jib fixed truss arm

7B jib jib arm

8 rope carrier

9 rope wheel

10 booms

11 variable amplitude pulley mechanism

detailed description

It should be noted that the embodiments in the present disclosure and the features in the embodiments may be combined with each other without conflict. The disclosure will be described in detail below with reference to the drawings in conjunction with the embodiments.

Hereinafter, a preferred embodiment of the jib luffing device of the present disclosure will be further developed in conjunction with FIGS. 1 to 3. Step by step.

The jib luffing device of the present embodiment is used for the slewing operation of the sub-crane arm 10, and includes a fixed truss arm 7A of the jib, a yoke arm 7B of the jib, and a slewing pulley mechanism 11. Wherein, the fixed truss arm 7A is disposed on the head of the crane main boom, and the variable truss arm 7B is hinged to the fixed truss arm 7A through the pin; the first pulley and the second pulley in the variator pulley mechanism 11 are respectively fixed to the truss The arm 7A is hinged to the yoke arm 7B; when the jib mechanism 10 is used for the slewing operation of the sub jib 10, the swelled hoisting rope 2 is wound around the slewing pulley mechanism. Preferably, the variable amplitude hoisting wire rope 2 may be a main hoisting wire rope or a secondary hoisting wire rope. As shown in FIG. 1, when the auxiliary boom 10 is in the auxiliary state, the idle hoisting wire rope 2 is used to wind the rope and provide the auxiliary power of the auxiliary boom 10, and the hoisting wire rope 1 is hoisted. .

In the present embodiment, the luffing pulley mechanism 11 includes: a first pulley and a second pulley disposed in parallel, each set of pulleys including a single or a plurality of variable amplitude pulleys, wherein the first pulley is hinged to the fixed truss arm 7A, the second pulley Hinged to the yoke arm 7B. Further, the first pulley comprises a plurality of first wheel bodies arranged side by side (ie, the axes of the respective first wheel bodies coincide), and the second pulley comprises a plurality of second wheel bodies arranged side by side (ie, the second wheel bodies of the respective second wheel bodies) The axis is coincident), the axes of the first wheel body and the second wheel body are parallel, and the variable amplitude hoisting wire rope 2 is sequentially wound around each of the first wheel body and the second wheel body. Thus, the first pulley, the second pulley, and the variable hoisting rope 2 correspond to the formation of the pulley block, and by providing the number of the first wheel bodies and the number of the second wheel bodies, different labor-saving magnifications can be realized.

Further, the jib lapping device further includes a over sheave assembly; the over sheave assembly includes a over sheave 8 and a over sheave 9; the over sheave 9 is disposed on the over sheave 8; The wire rope 2 is wound around the first pulley and the second pulley of the luffing pulley of the luffing pulley mechanism 11 via the sheave 9 . The cross-rope frame 8 may be in a herringbone shape, that is, the over-the-rope frame comprises a first wheel frame body and a second wheel frame body, and the second wheel frame body is connected to the middle of the first wheel frame body, and the two are fixed between the two Angle.

Further preferably, the jib luffing device further includes a limiting unit disposed on both sides of the luffing pulley mechanism and configured to mechanically limit the limit position of the sub-boom 10, ie The jib mechanical luffing mechanism known in the prior art eliminates the positioning of the pin at 20° position so that the jib can freely vary from 0° to 40°.

The limiting unit may be a limiting pull plate assembly, and the limiting pull plate assembly comprises a first pull plate 3 and a second pull plate 4, the first pull plate 3 is slidable relative to the second pull plate 4; During the sliding of the second pull plate 4, the amplitude of the auxiliary boom 10 is changed, and after the auxiliary boom 10 reaches a given position, the pin 5 is positioned and connected.

Next, the working principle of the embodiment of the jib luffing device of the present disclosure will be further described with reference to FIGS. 1 to 3.

The variable pulley mechanism 11 can realize the wire rope combination of different magnifications through the pulley block to reduce the wire rope pulling force; the limit pull plate assembly can perform the mechanical limit of 0° and 40° on the auxiliary boom 10 to avoid the auxiliary boom 10 Receive or over discharge.

When the main boom is extended, the sub-boom 10 is at an angle of 0° by tightening the variable hoisting rope 2 (Fig. 1), and the main boom is extended to drive the variable hoisting rope 2 Rope; when the main boom is retracted, the hoisting and hoisting synchronously tightens the wire rope, and the main boom is retracted by the combination of the main boom and the variable hoisting wire rope 2.

When the sub-boom 10 is in operation, the sub-boom 10 is swung by the retracting and hoisting wire 2, as shown in FIG. When the auxiliary boom 10 is operated at an angle of 40°, the working load is carried by the limit pull plate assembly, and the variable hoisting wire rope 2 is unstressed and in a relatively relaxed state.

In particular, when the sub-boom 10 luffing device is not required, the angle change of the auxiliary boom 0°, 20°, 40° can be manually realized by the limit pull plate assembly, and the limit pull plate assembly and the universal The mechanical luffing mechanism is similar.

The embodiment of the jib luffing device of the present disclosure utilizes a pulley mechanism for luffing, combined with a main hoisting wire rope or a sub-winding wire rope as a wire rope for sizing; it can realize automatic variability of the working state of the jib of the crane, saving time and labor No additional electrical or hydraulic equipment is required to save costs.

Moreover, when the main arm is retracted, the hoisting wire rope is synchronously recovered, and the auxiliary arm can be assisted. Reduce the pressure load on the main arm retractor cylinder. This is because when the main boom is extended, the hoisting rope can be driven to release the rope; when the main boom is retracted, the jib of the auxiliary boom is hoisted to simultaneously tighten the wire rope, and the main boom is retracted. The cylinder and the variable amplitude hoisting wire rope work together to achieve the retraction of the main boom. At this time, due to the limited pulling force of the hoisting wire rope, generally no more than 15 tons, the main boom and the auxiliary boom structure are not damaged, thereby simplifying the operation procedure of the telescopic arm, and the operation is simple, convenient and practical.

Further preferably, the jib luffing device may be replaced with a hydraulic ram; the hydraulic ram is also disposed between the fixed truss arm and the luffing truss arm.

In a specific implementation, the variable amplitude pulley mechanism 11 can be disassembled and replaced with a hydraulic oil cylinder, and a hydraulic oil delivery reel can be installed on the auxiliary arm. Thus, the auxiliary arm luffing device of the present embodiment can be interchanged with the hydraulic oil cylinder for convenient selection and configuration.

It can be seen that the jib luffing device of the present disclosure can realize the interchange and matching of the conventional mechanical luffing, the hydraulic cylinder automatic luffing and the hoisting wire rope automatic luffing.

In a second aspect, the present disclosure also discloses a crane provided with the jib luffing device of any of the above. Since the crane includes the above-described jib luffing device, it also has the technical effect that the jib luffing device should have. I will not repeat them.

In a third aspect, the present disclosure also discloses a jib amplitude sizing method, which is based on the above-described jib luffing device, and performs a sub-boom sag operation by retracting the slanted hoisting wire 2 . Specifically, the luffing wire rope 2 may be wound around the luffing pulley mechanism 11, and the luffing operation of the sub-boom 10 may be realized by controlling the retracting of the luffing wire rope 2.

The above description is only for the preferred embodiment of the disclosure, and is not intended to limit the disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the disclosure should be included in the disclosure. Within the scope of protection.

Industrial applicability

The jib luffing device, the crane and the jib luffing method provided by the present disclosure, using the variable amplitude pulley The mechanism, combined with the variable amplitude hoisting wire rope, can realize the automatic amplitude change of the working state of the crane jib, saving time and labor; no additional electrical or hydraulic equipment is needed, and the cost is saved, for example, compared with the hydraulic cylinder of the prior art. The frame mechanism can save the cost of one cylinder, one hose reel and related hydraulic accessories; and the hoisting wire rope is synchronously recovered when the main arm is retracted, which can play the role of auxiliary retracting arm and reduce the pressure of the main arm retracting arm cylinder load. Therefore, the jib luffing device, the crane and the jib luffing method of the present disclosure have industrial applicability.

Claims

A jib luffing device for a luffing operation of a crane auxiliary boom, characterized in that it comprises:

a fixed truss arm (7A) of the jib, a jib arm (7B) of the jib, and a luffing pulley mechanism (11);

The fixed truss arm (7A) is disposed on a head of the crane main boom;

The luffing truss arm (7B) is hinged to the fixed truss arm (7A);

The luffing pulley mechanism (11) includes a first pulley hinged to the fixed truss arm (7A) and a second pulley hinged to the jib arm (7B);

When the sub-boom (10) is subjected to a luffing operation using the luffing pulley mechanism (11), the variable hoisting wire rope (2) is wound around the first pulley of the luffing pulley mechanism (11) And on the second pulley.
The jib luffing device according to claim 1, wherein

The variable amplitude hoisting wire rope (2) is a main hoisting wire rope or a secondary hoisting wire rope.
The jib luffing device of claim 1 further comprising:

Through the sheave assembly;

The over sheave assembly includes a over sheave frame (8) and a over sheave (9);

The over sheave (9) is hinged to the over sheave frame (8);

The variable hoisting wire rope (2) is wound onto the slewing pulley mechanism (11) via the sprocket wheel (9).
The jib luffing device according to claim 3, wherein

The over-the-rope (9) frame includes a first wheel frame body and a second wheel frame body, and the second wheel frame body Connected to the middle of the first wheel frame body, and the first wheel frame body and the second wheel frame body have a certain angle between them.
The jib luffing device according to claim 1, wherein

The first pulley includes a plurality of first wheel bodies arranged side by side, and the second pulley includes a plurality of second wheel bodies arranged side by side; the axes of the first wheel body and the second wheel body are parallel.
The jib luffing device according to any one of claims 1 to 5, further comprising:

The limiting unit is disposed on both sides of the variable amplitude pulley mechanism (11) and is configured to mechanically limit the limit position of the auxiliary lifting arm (10).
The jib luffing device according to claim 6, wherein

The limiting unit is a limiting pull plate assembly.
The jib luffing device according to claim 7, wherein

The limit pull plate assembly includes a first pull plate (3) and a second pull plate (4), the first pull plate (3) is slidable relative to the second pull plate (4); Changing the amplitude of the auxiliary boom (10) relative to the sliding of the second pull plate (4), and after the auxiliary boom (10) reaches a given position, The first pull plate (3) and the second pull plate (4) are positioned and connected by a pin (5).
A crane characterized by being provided with a jib luffing device according to any one of claims 1 to 8.
A jib amplitude variability method, the method being based on claims 1 to 8 Any one of the jib luffing devices performs the luffing operation of the sub-boom (10) by retracting the hoisting wire rope (2).