WO2013189154A1

WO2013189154A1 - Method and device for improving lateral load capacity of arm support, and crane

Info

Publication number: WO2013189154A1
Application number: PCT/CN2012/085806
Authority: WO
Inventors: 姜春华; 孙开胜; 郝以运; 白刚
Original assignee: 湖南三一智能控制设备有限公司; 上海三一科技有限公司
Priority date: 2012-06-18
Filing date: 2012-12-04
Publication date: 2013-12-27
Also published as: CN102701086A

Abstract

A device for improving the lateral load capacity of an arm support is arranged on the arm support (6) and comprises two masts (1), a tensioning hoisting mechanism (3) and a pawl locking device (4). The two masts (1) are symmetrically arranged on the two sides of the arm support (6) respectively and perpendicular to the arm support (6), the two masts (1) and the arm support(6) are positioned on the same plane, and the masts (1) are hinged with the arm support (6).The tensioning hoisting mechanism (3) and the pawl locking device (4) are arranged at the head ends of the masts (1), which are far away from the arm support (6). A guide pulley (7) is arranged on the top of the arm support (6), and a steel wire rope (8) is connected between the guide pulley (7) and the tensioning hoisting mechanism (3). The head end of each mast (1) is connected to the root of the arm support (6) through a connecting device (5), a pull sensor (9) is arranged on the connecting device (5), and a controller controls the rotation direction of the tensioning hoisting mechanism (3) through a signal from the pull sensor (9). A method for improving lateral load capacity of arm support and a crane are also disclosed. Part of lateral loads can be offset by a lateral support device, so that the stress condition of a main arm is improved, the lateral stability of the arm support is improved, and the load capacity of the arm support is improved.

Description

Method, device and crane for improving the lateral load capacity of the boom The present application claims to be submitted to the Chinese Patent Office on June 18, 2012, the application number is 201210200413.5, and the invention is entitled "Method, device and crane for improving the lateral load capacity of the boom The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

The present invention relates to the field of construction machinery, and more particularly to a method, apparatus and crane for improving the lateral load capacity of a boom. Background technique

With the development of modular design, the global lifting market has become more and more demanding for the lifting capacity of crawler cranes, and the height of the positioning is getting higher and higher, so the truss arms are developed in the direction of large section, large length and large weight.

However, in the actual situation, the requirements of the shipping width at home and abroad strictly limit the cross section of the truss arm. This leads to the contradiction between the lifting capacity of the truss arm and the section limitation. Summary of the invention

A device for improving the lateral load capacity of the boom is provided. The lateral support can offset part of the lateral load, improve the stress state of the main arm, improve the lateral stability of the boom, and finally improve the boom side of the crawler crane. Load capacity. Specifically achieved through the following technical solutions:

The device for improving the lateral load capacity of the boom is disposed on the boom, wherein the device for improving the lateral load capacity of the boom comprises:

Two masts are respectively symmetrically disposed on two sides of the boom and perpendicular to the boom, one ends of the two masts are hinged to the boom, and the two masts are in the same plane as the boom; a tensioning hoisting mechanism and a pawl locking device for locking the tensioning hoisting mechanism, the tensioning roll a lifting mechanism and the pawl locking device are disposed at a front end of the mast away from the boom; a guiding pulley is disposed at a top of the boom, and a connection between the guiding pulley and the tension hoisting mechanism is a wire rope; a connecting device having one end connected to the head end of the boom and the other end connected to the root of the arm frame.

Further, the device for improving the lateral load capacity of the boom further includes: a tension sensor and a controller connected to the tension sensor signal; the tension sensor is disposed on the connecting device, configured to test the connecting device Pulling; the controller controls a rotation direction of the tension hoisting mechanism on the same side of the tension sensor according to the signal of the tension sensor.

Further, the means for increasing the lateral load capacity of the boom further comprises an electromagnetic reversing valve, the controller controlling the direction of rotation of the tensioning hoisting mechanism by means of an electromagnetic reversing valve.

Further, the device for increasing the lateral load capacity of the boom further includes a speed reducer, and the speed reducer is disposed at a side of the tension hoisting mechanism.

Further, the two masts are respectively disposed on the left and right sides of the boom.

Further, the two masts are connected to the lower arm of the boom.

Further, the connecting device is a pull plate or a rope row.

The present invention also provides a method for improving the lateral load capacity of the boom, comprising the following steps: Step 1: collecting the tensile force data of the connecting device in the device for improving the lateral load capacity of the boom; Step 2, if the tensile force data is greater than The upper limit of the preset range controls the tensioning hoisting mechanism to release the rope, and if the tension data is at the lower limit of the preset range, the tensioning hoisting mechanism is controlled to collect the rope.

Further, in the step 2, the tensioning and hoisting mechanism is used to collect or release the rope by controlling the electromagnetic directional control valve.

The present invention also provides a crane comprising a boom on which the apparatus for increasing the lateral load capacity of the boom is provided. DRAWINGS

The invention will be described in detail by reference to the accompanying drawings, Its features, shape and advantages will become more apparent. The same reference numerals are used throughout the drawings to refer to the same parts. The drawings are not intended to be drawn to scale, and the emphasis is on the subject matter of the invention. In the drawings, parts are exaggerated for clarity.

Figure 1 shows a schematic view of an apparatus for increasing the lateral load capacity of a boom, in accordance with one embodiment of the present invention;

2 is a schematic view showing a hoisting mechanism in a device for increasing the load capacity of an arm lateral frame according to an embodiment of the present invention;

Figure 3 is a schematic view of the direction A in Figure 2; DETAILED DESCRIPTION OF THE INVENTION The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of the invention.

Referring to FIG. 1 , an embodiment of a device for improving the lateral load capacity of a boom is provided on the boom 6 . Specifically, the device for improving the lateral load capacity of the boom includes: The masts 1 are respectively symmetrically disposed on both sides of the boom 6 and perpendicular to the booms 6, the two masts 1 and the boom 6 are in the same plane, and the mast 1 is hinged to the boom 6; a hoisting mechanism 3 and a pawl locking device 4 for locking the tension hoisting mechanism 3, both of which are disposed at a head end of the mast 1 away from the boom 6; A guide pulley 7 is mounted on the top, and a wire rope 8 is connected between the guide pulley 7 and the tension hoisting mechanism 3; the head ends of each of the masts 1 are respectively connected to the root of the boom 6 through a connecting device 5 to form a stable a triangular structure, the connecting device 5 is provided with a tension sensor 9 for providing a tension signal to a controller (not shown in FIG. 1), and the controller controls the electromagnetic according to the pulling force signal Directional valve (not shown in Figure 1 Out) to vary the tension sensor 9 and the same side of the winding mechanism 3 rotates the tensioning direction. The mast 1 is hinged to the boom 6 so that the mast can be pivotally fixed around the root of the mast to the sides of the lower arm 2 during transport, without separate transport.

In the device for improving the lateral load capacity of the boom provided by the above embodiment, the mast 1 is laterally The role of the support, and between the mast 1 and the top of the boom 6 and the wire rope 8, and between the mast 1 and the base of the boom 6 and the connecting device 5 form a stable triangular structure, whereby the above device is equivalent to the formation of the boom 6 The lateral support device can cancel part of the lateral load by the lateral support device, improve the stress state of the main arm, improve the lateral stability of the boom, and finally improve the load capacity. It also has the advantage of convenient disassembly and assembly. When transporting, the mast can be pivoted around its root to be fixed on both sides of the lower section arm to meet the needs of domestic and international transportation width.

It should be noted that, in the above embodiment, the device for improving the lateral load capacity of the boom may not be provided with the tension sensor 9, the controller and the electromagnetic reversing valve, and the device can also offset part of the lateral load and improve the main arm. The force state improves the lateral stability of the boom, improves its load capacity, and facilitates disassembly. The advantages of the tension sensor 9 and the electromagnetic reversing valve are as follows: It is convenient for the operator to control the rope collection and the rope release of the tension hoisting mechanism according to the tension of the connecting device, so as to realize the automatic adjustment of the above device to ensure that it is in a stable structure state. . Further, in the above embodiment, the controller controls the direction of rotation of the tension hoisting mechanism by means of an electromagnetic directional control valve, and the electromagnetic directional control valve may specifically be a three-position four-way valve. Of course, the controller can also implement the above control functions through other components.

It will be understood by those skilled in the art that the purpose of the embodiment of the present invention is to improve the lateral load capacity of the boom. Therefore, the two masts 1 can be respectively disposed on the left and right sides of the boom 6.

In the above-described technical solution, the wire rope 8 is wound around the guide pulley 7 and tensioned by the tension hoisting mechanism 3, and the lock is realized by the pawl locking device 4.

More specifically, the two masts 1 are connected to the lower section arm 2 of the boom 6.

Preferably, the connecting device 5 is a pull plate or a rope row.

Referring to Figures 2 and 3, more preferably, the side of the tension hoisting mechanism 3 is provided with a speed reducer 10 for controlling the speed of the rope.

On the other hand, the embodiment of the present invention further provides a method for improving the load capacity of the boom. When the boom is subjected to the side load, the following steps are performed: Step 1: collecting the sensor data of the one side; Step 2, if the data of the sensor is greater than the pre- Setting an upper limit of the range, controlling the tensioning hoisting mechanism 3 to release the rope, if If the data of the sensor is less than the lower limit of the preset range, the tension hoisting mechanism 3 is controlled to collect the rope. The above lateral support device and method can cancel part of the lateral load, improve the stress state of the main arm, improve the lateral stability of the boom, and finally improve the load capacity.

It will be understood by those skilled in the art that the above method is based on the apparatus for improving the lateral load capacity of the boom provided by the above embodiment, and the step 1 is based on the apparatus provided with the tension sensor 9. For the above apparatus in which the tension sensor 9 is not provided, the step 1 is to collect the tension data of the connecting means in the apparatus for improving the lateral load capacity of the boom.

Further, in step 2, the tensioning hoisting mechanism 3 is used to take the rope or to release the rope by controlling the hydraulic system electromagnetic reversing valve.

Embodiments of the present invention also provide a crawler crane including a boom 6, which is provided with the above-described means for increasing the lateral load capacity of the boom. The above-mentioned device for improving the lateral load capacity of the boom can not only improve the lateral load capacity of the boom during construction, but also meet the requirements for the width of transportation at home and abroad.

It should be understood by those skilled in the art that the variations can be implemented by those skilled in the art in combination with the prior art and the above embodiments, and are not described herein. Such variations do not affect the substance of the present invention and will not be described herein.

The preferred embodiments of the present invention have been described above. It is to be understood that the invention is not limited to the specific embodiments described above, and that the device and structure that are not described in detail are to be construed as being In the scope of the present invention, many possible variations and modifications may be made to the technical solutions of the present invention by using the methods and technical contents disclosed above, or modified to equivalent variations, which do not affect the substance of the present invention. Therefore, the contents of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Industrial applicability The method, device and crane for improving the lateral load capacity of the boom provided by the invention can offset part of the lateral load by the lateral support device, improve the stress state of the main arm, improve the lateral stability of the boom, and finally improve Its load capacity. It also has the advantage of convenient disassembly and assembly. When transporting, the mast can be pivoted around its root to be fixed on both sides of the lower section arm to meet the needs of domestic and international transportation width. Therefore, the present invention has industrial applicability.

Claims

claims

1. A device for improving the lateral load capacity of the boom, located on the boom, characterized in that the device for improving the lateral load capacity of the boom includes:

Two masts are respectively symmetrically arranged on both sides of the boom and perpendicular to the boom, one end of the two masts is hinged to the boom, and the two masts and the boom are on the same plane; A tensioning and hoisting mechanism and a pawl locking device for locking the tensioning and hoisting mechanism. The tensioning and hoisting mechanism and the pawl locking device are located at the head end of the mast away from the boom;

A guide pulley is provided on the top of the boom, and a wire rope is connected between the guide pulley and the tensioning and hoisting mechanism;

One end of the connecting device is connected to the head end of the boom, and the other end is connected to the root of the boom.

2. The device for improving the lateral load capacity of the boom according to claim 1, characterized in that, the device for improving the lateral load capacity of the boom further includes: a tension sensor and a controller signally connected to the tension sensor. ; The tension sensor is provided on the connection device and is configured to test the tension of the connection device; the controller controls the rotation direction of the tensioning winch mechanism on the same side as the tension sensor according to the signal of the tension sensor.

3. The device for improving the lateral load capacity of the boom according to claim 2, characterized in that the device for improving the lateral load capacity of the boom also includes an electromagnetic reversing valve, and the controller uses an electromagnetic reversing valve. The direction valve controls the rotation direction of the tensioning and hoisting mechanism.

4. The device for improving the lateral load capacity of the boom according to claim 1, wherein the device for improving the lateral load capacity of the boom further includes a reducer, and the reducer is arranged on the tensioner. Tighten the side of the winch mechanism.

5. The device for improving the lateral load capacity of the boom according to claim 1, wherein the two masts are respectively provided on the left and right sides of the boom.

6. The device for improving the lateral load capacity of the boom according to claim 1, characterized in that, The two masts are both connected to the lower arm of the boom.

7. The device for improving the lateral load capacity of the boom according to claim 1, wherein the connecting device is a pull plate or a rope row.

8. A method for improving the lateral load capacity of the boom, characterized in that it includes the following steps: Step 1. Collect the tensile force data of the connecting device in the device for improving the lateral load capacity of the boom according to claim 1;

Step 2: If the pulling force data is greater than the upper limit of the preset range, the tensioning and winching mechanism is controlled to release the rope. If the pulling force data is less than the lower limit of the preset range, the tensioning and winching mechanism is controlled to retract the rope.

9. The method according to claim 8, characterized in that, in the step 2, the tensioning and hoisting mechanism realizes the rope retracting or releasing by controlling the electromagnetic reversing valve.

10. A crane, including a boom, characterized in that the boom is provided with the device for improving the lateral load capacity of the boom according to any one of claims 1 to 7.