Cargo boom provided with double amplitude changing devices and crane

Abstract

The utility model provides a cargo boom provided with double amplitude changing devices and a crane. The cargo boom comprises a superlift mast, a main boom luffing mechanism, a main boom rear pulling plate assembly, a support, a tower boom luffing mechanism, a main boom front pulling plate assembly and a main boom. The main arm is divided into a main arm rear section and a main arm front section, the main arm rear section is hinged to the main arm front section, one end of the main arm luffing mechanism is connected with the super-lift mast, the other end of the main arm luffing mechanism is connected with the support through a main arm rear pulling plate assembly, the tower arm luffing mechanism is arranged on the main arm rear section through the support, and the tower arm luffing mechanism is connected with the main arm front section through a main arm front pulling plate assembly. The main arm luffing mechanism is used for driving the main arm rear section to swing through the main arm rear pulling plate assembly; the tower arm luffing mechanism is used for driving the main arm front section to swing through the main arm front pulling plate assembly. The main arm is divided into the two hinged sections, and the bracket and the tower arm luffing mechanism are additionally arranged on the main arm, so that the arm lifting problem of the super-long main arm is solved, the configuration requirements of a pulling plate, a super-lifting mast, a counter weight and the like of the crane are reduced, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cranes, and in particular to a crane boom and crane equipped with a double luffing device. Background Technology

[0002] Tracked cranes are among the most common types of cranes, frequently used for lifting large workpieces. The length of the crane's main boom is a crucial indicator of its performance, determining the maximum height the crane can lift a workpiece. This leads to the challenge of raising an extra-long boom. To accommodate an extra-long boom, the boom torque needs to be significantly increased, resulting in increased tension plate force, boom luffing force, axial force on the superlift mast, and superlift counterweight, thus raising the overall cost of the luffing system.

[0003] Main boom raising is a crucial aspect of crawler crane operation and is often considered a hazardous condition. The main boom is typically assembled from several boom sections, forming a single unit during raising. Current technologies, to achieve ultra-long main boom raising, require significantly strengthening the corresponding tie plates, super-lift mast, and other structures, while also employing larger luffing mechanisms and adding more super-lift counterweights. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a crane boom and crane equipped with a double luffing device.

[0005] To address the problems of existing technologies, this utility model discloses a crane boom equipped with a dual luffing device, comprising: a superlift mast, a main boom luffing mechanism, a main boom rear pull plate assembly, a support frame, a tower boom luffing mechanism, a main boom front pull plate assembly, and a main boom; the main boom is divided into a rear section and a front section, the rear section and the front section are hinged together, one end of the main boom luffing mechanism is connected to the superlift mast, the other end of the main boom luffing mechanism is connected to the support frame through the main boom rear pull plate assembly, the tower boom luffing mechanism is mounted on the rear section of the main boom through the support frame, and the tower boom luffing mechanism is connected to the front section of the main boom through the main boom front pull plate assembly;

[0006] The main boom luffing mechanism is used to drive the rear section of the main boom to swing through the main boom rear pull plate assembly.

[0007] The boom luffing mechanism is used to drive the front section of the boom to swing via the boom front pull plate assembly.

[0008] Furthermore, the main boom rear pull plate assembly includes a main boom rear pull plate and a main boom wire rope. One end of the main boom wire rope is connected to the tower boom luffing mechanism, and the other end is connected to the main boom luffing mechanism through the main boom rear pull plate.

[0009] The main boom front pull plate assembly includes a main boom front pull plate and a tower boom wire rope. One end of the tower boom wire rope is connected to the tower boom luffing mechanism through the main boom front pull plate, and the other end is connected to the front section of the main boom.

[0010] Furthermore, both the main boom rear pull plate and the main boom front pull plate are equipped with tension sensors.

[0011] Furthermore, the rear section of the main boom and the front section of the main boom are hinged by a pin, and a power pin is also provided between the rear section of the main boom and the front section of the main boom. When the rear section of the main boom and the front section of the main boom are in a straight line, the power pin is inserted into the pin holes respectively provided in the rear section of the main boom and the front section of the main boom; when the front section of the main boom needs to swing relative to the rear section of the main boom, the power pin is pulled out from the pin holes respectively provided in the rear section of the main boom and the front section of the main boom.

[0012] Furthermore, it also includes a power pin drive device, which is used to drive the power pin to insert into or pull out of pin holes respectively located in the rear section and the front section of the main boom.

[0013] The second aspect of this utility model provides a crane, which includes a lower carriage and a turntable, and also includes a boom as described above, wherein the super-lift mast and the rear section of the main boom are respectively connected to the turntable.

[0014] Furthermore, it also includes a super-lift counterweight, which is disposed on the turntable.

[0015] Furthermore, it also includes a mast, which is located on the turntable and connected to the super-lift mast.

[0016] The beneficial effects of this utility model are:

[0017] This invention solves the problem of raising an ultra-long main boom by setting the main boom to two hinged sections and adding a bracket and a tower boom luffing mechanism to the main boom, thereby reducing the configuration requirements of crane pull plates, super-lift masts, counterweights, etc., and reducing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the main arm in the flat position in this utility model;

[0020] Figure 3 This is a schematic diagram showing the relative swinging state of the front and rear sections of the main arm in this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0022] like Figure 1As shown, this embodiment provides a crane boom equipped with a dual luffing device, including: a superlift mast 4, a main boom luffing mechanism 5, a main boom rear pull plate assembly 6, a support 7, a tower boom luffing mechanism 8, a main boom front pull plate assembly 9, and a main boom 10; the main boom 10 is divided into a rear section 10.1 and a front section 10.2, the rear section 10.1 and the front section 10.2 are hinged together, one end of the main boom luffing mechanism 5 is connected to the superlift mast 4, and the other end of the main boom luffing mechanism 5 is connected to the support 7 through the main boom rear pull plate assembly 6, and the tower boom luffing mechanism... The jib luffing mechanism 8 is mounted on the rear section 10.1 of the main boom via a bracket 7. The main boom luffing mechanism 8 is connected to the front section 10.2 of the main boom via the main boom front pull plate assembly 9. The main boom rear pull plate assembly 6 includes a main boom rear pull plate and a main boom wire rope. One end of the main boom wire rope is connected to the main boom luffing mechanism 8, and the other end is connected to the main boom luffing mechanism 5 via the main boom rear pull plate. The main boom front pull plate assembly 9 includes a main boom front pull plate and a main boom wire rope. One end of the main boom wire rope is connected to the main boom luffing mechanism 8 via the main boom front pull plate, and the other end is connected to the front section 10.2 of the main boom.

[0023] Both the main boom rear pull plate and the main boom front pull plate are equipped with tension sensors.

[0024] The rear section 10.1 of the main boom and the front section 10.2 of the main boom are hinged by a pin. A power pin is also provided between the rear section 10.1 and the front section 10.2 of the main boom. When the rear section 10.1 and the front section 10.2 of the main boom are in a straight line, the power pin is inserted into the pin holes of the rear section 10.1 and the front section 10.2 of the main boom. When the front section 10.2 of the main boom needs to swing relative to the rear section 10.1 of the main boom, the power pin is pulled out from the pin holes of the rear section 10.1 and the front section 10.2 of the main boom. A power pin drive device is also included, which is used to drive the power pin to insert into or pull out of the pin holes of the rear section 10.1 and the front section 10.2 of the main boom. Preferably, the front section 10.2 and the rear section 10.1 of the main boom are hinged together by four pins arranged in a quadrilateral shape. The lower two pins are in a standard configuration, while the upper two are power pins, equipped with hydraulic cylinders, allowing for remote operation of driving and pulling in the power pins. The power pins are mounted on the rear section 10.1 of the main boom. A support 7 is installed at the front of the rear section 10.1 of the main boom, and the two are hinged together by pins. The support 7 can rotate around the pins. The top of the support 7 is connected to the main boom rear pull plate assembly 9 and is equipped with a tower boom luffing mechanism 8, which has a fixed pulley system. The support 7 is a sleeve structure, and the power pins are preferably located on the support 7, allowing them to be driven into pre-drilled holes in the inner and outer sleeves of the front section 10.2 and the rear section 10.1 of the main boom at their minimum length.

[0025] The working process of the lifting arm in this embodiment is as follows:

[0026] Crane boom raising process: After the crane components are assembled, the state before the boom is raised is as follows. Figure 2 As shown. At this time, the power pin on the support 7 is in the driven-in state. The main boom luffing mechanism 5 retracts the main boom wire rope. When the tension sensor detects that the force of the main boom rear tie plate is close to the upper limit value, the tower boom luffing mechanism 8 releases the tower boom wire rope, causing the front section 10.1 of the main boom to fold downwards (a tower boom trolley can be installed at the head of the front section of the main boom for towing). When the tension sensor detects that the force of the main boom front tie plate has decreased by 20%, the tower boom wire rope movement stops, and the main boom luffing mechanism 5 retracts the main boom wire rope. Figure 3 As shown, repeat the above steps until the front section 10.1 of the main boom reaches the preset angle, then pull out the power pin on the support 7, freeing the support 7. Next, the boom luffing mechanism 8 retracts the boom wire rope, raising the front section 10.2 of the main boom until... Figure 1 State. At this time, the power pin is activated, driving the power pin in to connect the rear section 10.1 of the main arm with the front section 10.2 of the main arm into one unit.

[0027] Crane boom lowering process: Before lowering the boom, such as Figure 1 As shown, the main boom angle is set to the predetermined angle, and the power pin is activated, pulling it out. The rear section 10.1 of the main boom and the front section 10.2 of the main boom are now hinged. The tower boom luffing mechanism 8 releases the tower boom wire rope and lowers the front section 10.2 of the main boom until... Figure 3 Status. For example... Figure 2 The main boom luffing mechanism 5 then releases the main boom luffing wire rope, allowing the main boom head to touch the ground. The two luffing ropes are released alternately until the main boom is level. The power pin is then activated and driven into place. Example

[0028] This embodiment provides a crane using the aforementioned boom, including a lower carriage 1 and a turntable 11. The superlift mast 4 and the rear section 10.1 of the main boom are respectively connected to the turntable 11. It also includes a superlift counterweight 2, which is disposed on the turntable 11 to improve the stability during boom raising and lowering. Furthermore, it includes a mast 3, which is disposed on the turntable 11 and connected to the superlift mast 4. The mast 3 is used to improve the stability of the superlift mast 4 and the main boom.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the accompanying drawings of this utility model, the filling pattern is only used to distinguish the layers and is not used for any other limitation.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crane boom equipped with a dual luffing device, characterized in that, include: The super-lift mast (4), main boom luffing mechanism (5), main boom rear pull plate assembly (6), support frame (7), tower boom luffing mechanism (8), main boom front pull plate assembly (9), and main boom (10); the main boom (10) is divided into the rear section of the main boom ( 10.1) and the front section of the main boom (10.2), the rear section of the main boom (10.1) is hinged to the front section of the main boom (10.2), one end of the main boom luffing mechanism (5) is connected to the super-lift mast (4), the other end of the main boom luffing mechanism (5) is connected to the bracket (7) through the main boom rear pull plate assembly (6), the tower boom luffing mechanism (8) is set on the rear section of the main boom (10.1) through the bracket (7), and the tower boom luffing mechanism (8) is connected to the front section of the main boom (10.2) through the main boom front pull plate assembly (9); The main boom luffing mechanism (5) is used to drive the rear section (10.1) of the main boom to swing through the main boom rear pull plate assembly (6); The boom luffing mechanism (8) is used to drive the front section (10.2) of the boom to swing through the boom front pull plate assembly (9).

2. The crane boom equipped with a dual luffing device according to claim 1, characterized in that, The main boom rear pull plate assembly (6) includes a main boom rear pull plate and a main boom wire rope. One end of the main boom wire rope is connected to the tower boom luffing mechanism (8), and the other end is connected to the main boom luffing mechanism (5) through the main boom rear pull plate. The main boom front pull plate assembly (9) includes a main boom front pull plate and a tower boom wire rope. One end of the tower boom wire rope is connected to the tower boom luffing mechanism (8) through the main boom front pull plate, and the other end is connected to the front section of the main boom (10.2).

3. The lifting boom equipped with a dual luffing device according to claim 2, characterized in that, Both the main boom rear pull plate and the main boom front pull plate are equipped with tension sensors.

4. The crane boom equipped with a dual luffing device according to claim 1, characterized in that, The rear section (10.1) of the main boom and the front section (10.2) of the main boom are hinged by a pin. A power pin is also provided between the rear section (10.1) and the front section (10.2) of the main boom. When the rear section (10.1) and the front section (10.2) of the main boom are in a straight line, the power pin is inserted into the pin holes of the rear section (10.1) and the front section (10.2) of the main boom respectively. When the front section (10.2) of the main boom needs to swing relative to the rear section (10.1), the power pin is pulled out from the pin holes of the rear section (10.1) and the front section (10.2) of the main boom respectively.

5. The lifting boom equipped with a dual luffing device according to claim 4, characterized in that, It also includes a power pin drive device, which is used to drive the power pin to insert into or pull out of the pin holes respectively located in the rear section (10.1) and front section (10.2) of the main boom.

6. A crane comprising a lower carriage (1) and a turntable (11), characterized in that, It also includes the lifting boom as described in any one of claims 1-5, wherein the superlift mast (4) and the rear section of the main boom (10.1) are respectively connected to the turntable (11).

7. The crane according to claim 6, characterized in that, It also includes a super-lift counterweight (2), which is located on the turntable (11).

8. The crane according to claim 6, characterized in that, It also includes a mast (3), which is located on the turntable (11) and is connected to the super-lift mast (4).

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