A boom folding device for quickly erecting a tower crane

Abstract

The present invention discloses a boom-folding device for a rapid-erecting tower crane. The front middle portion of the rear folding arm of the rapid-erecting tower crane is hingedly connected to the rear middle portion of the front folding arm to form a hinge point D. The boom-folding device is disposed between the front and rear folding arms and includes a boom linkage mechanism and a boom-folding hydraulic cylinder. The bottom end of the boom-folding hydraulic cylinder is hingedly connected to the rear folding arm. The boom linkage mechanism and the telescopic end of the boom-folding hydraulic cylinder are hingedly connected to form a hinge point A. The boom linkage mechanism includes a front folding arm link and a rear folding arm link. One end of the front folding arm link is hingedly mounted within the front folding arm to form a hinge point B, while one end of the rear folding arm link is hingedly mounted within the rear folding arm to form a hinge point C. This invention improves the stability of the entire crane during autonomous movement and is particularly suitable for material transportation and building component installation in low-rise buildings or in congested locations.

Description

Technical Field

[0001] The invention relates to a boom folding device, in particular to a boom folding device suitable for a fast-erecting tower crane, and belongs to the technical field of lifting machinery equipment. Background Art

[0002] Tower crane, also known as tower crane, is a rotating crane with a boom mounted on the top of a tall tower. Tower crane has a large operating space and is mainly used for vertical and horizontal transportation of materials and installation of building components in house construction.

[0003] At present, most of the tower cranes used in my country's construction industry are of the upper slewing fixed installation structure, that is, the boom, counter-arm and tower body are installed on the support as a whole, and the support is fixed and does not rotate, and is fixedly installed on a whole concrete foundation or an X-shaped concrete foundation. The boom and counter-arm are rotated by a turntable set at the upper end of the tower body, and the tower body is gradually raised by jacking up and adding foundation sections. This traditional tower crane is suitable for large buildings or high-rise buildings. For low-rise buildings with a construction height of 10 to 30 meters or certain crowded occasions with many surrounding buildings, if this traditional tower crane is used, it will not only be overkill and increase the cost, but also often appear clumsy in application, and there are defects such as inconvenience in erection and dismantling, and delay in the construction period of the construction project.

[0004] In view of this, there is a fast-erecting tower crane with a lower slewing structure in the prior art, in which a turntable is arranged at the lower end of the tower body, and the tower body and the lifting arm are foldably mounted on the turntable. In the unfolded state, the crane can be lifted, luffed and slewed by remote control, and in the folded state, it can be towed and transferred by traction equipment such as a traction locomotive. In the folded and stored state of this existing fast-erecting tower crane, the folding arms are stacked, which will result in an overall height that is too high and a high center of gravity, which will further lead to poor passability and insufficient driving stability of the entire machine during the transfer process. Summary of the Invention

[0005] In response to the above problems, the present invention provides a boom folding device for a fast-erecting tower crane, which can increase the driving stability of the entire machine during autonomous movement and is particularly suitable for material transportation and building component installation in low-rise building construction or crowded sites.

[0006] To achieve the above purpose, the folding boom of the fast-erecting tower crane includes a rear folding arm and a front folding arm, wherein the front middle portion of the rear folding arm is hingedly connected to the rear middle portion of the front folding arm to form a hinge point D;

[0007] The boom folding device is arranged between the front folding arm and the rear folding arm, and includes a boom connecting rod mechanism and a boom folding hydraulic cylinder; the boom folding hydraulic cylinder is arranged in front of the rear folding arm, and the bottom end of the cylinder body is hingedly connected to the rear folding arm; the boom connecting rod mechanism is a triangular structure or a horizontally placed U-shaped structure, and the boom connecting rod mechanism is hingedly installed and connected to the telescopic end of the boom folding hydraulic cylinder to form a hinge point A, and the boom connecting rod mechanism includes a front folding arm link and a rear folding arm link, one end of the front folding arm link is hingedly installed inside the front folding arm to form a hinge point B, and one end of the rear folding arm link is hingedly installed inside the rear folding arm to form a hinge point C. When in the folded state, the front folding arm is buckled on the rear folding arm, and the hinge point A is located behind the hinge point B and the hinge point C, and the spacing between the hinge point A and the hinge point B is smaller than the spacing between the hinge point A and the hinge point C.

[0008] As a further improvement of the present invention, a folding arm flipping guide structure is provided between the rear folding arm and the front folding arm.

[0009] As an embodiment of the present invention, the folding arm flip guide structure includes a semicircular guide groove provided on the front folding arm corresponding to the hinge point D and a guide pin fixedly provided on the rear folding arm.

[0010] As a further improvement of the present invention, mutually cooperating end face safety locking devices are provided between the rear folding arm and the front folding arm.

[0011] As an embodiment of the end face safety locking device of the present invention, the end face safety locking device is a latch mechanism arranged inside the folding crane arm and perpendicular to the end face. The latch mechanism includes a telescopic control component and a latch. The telescopic control component is fixedly installed inside the folding crane arm, and the telescopic end of the telescopic control component is connected to the bottom end of the latch.

[0012] Compared with the existing technology, the boom folding device of this fast-erecting tower crane is hingedly connected to the middle part of the front end of the rear folding arm and the middle part of the rear end of the front folding arm, and a boom folding device is provided between the front folding arm and the rear folding arm. In the fully folded transfer state, the front folding arm can be buckled on top of the rear folding arm instead of being stacked on top of the rear folding arm. Therefore, compared with the traditional fully stacked structure, the height dimension of the entire machine in the folded state can be reduced, thereby lowering the center of gravity of the entire machine and increasing the driving stability during autonomous movement. It is particularly suitable for material transportation and building component installation in low-rise buildings or crowded sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the self-moving rapid erection tower crane in a fully folded transfer state;

[0014] Figure 2It is a structural diagram of the self-moving rapid erection tower crane in a fully deployed working state;

[0015] Figure 3 It is a schematic structural diagram of the present invention in a fully folded state;

[0016] Figure 4 It is a schematic structural diagram of the present invention in a fully expanded state;

[0017] Figure 5 It is a structural diagram of a self-moving fast-erecting tower crane during its deployment process.

[0018] In the figure: 1. vehicle chassis, 2. turntable, 3. tower body, 31. guide rope support rod, 4. folding boom, 41. rear folding arm, 42. front folding arm, 43. mast, 5. boom folding device, 51. boom connecting rod mechanism, 511. front folding arm connecting rod, 512. rear folding arm connecting rod, 52. boom folding hydraulic cylinder. DETAILED DESCRIPTION

[0019] The present invention will be further described below by taking the installation of the present invention on a self-moving, fast-erecting tower crane as an example and in conjunction with the accompanying drawings (the following description will be based on the state of the self-moving, fast-erecting tower crane after erection, and the description will be based on the extension direction of the folded boom after erection as the front).

[0020] like Figure 1 、 Figure 2 、 Figure 5 As shown, the self-moving fast-erecting tower crane includes a vehicle chassis 1, a turntable 2, a tower body 3, a folding boom 4, a boom folding device 5, a hook group, a luffing device, a hoisting winch device, and a counterweight.

[0021] The automobile chassis 1 is provided with a cab, a chassis drive assembly, an on-board hydraulic pump station and a plurality of retractable hydraulic telescopic legs symmetrically arranged along the center of the automobile chassis 1. The retractable hydraulic telescopic legs are connected to the control valve group of the on-board hydraulic pump station through hydraulic pipelines.

[0022] The turntable 2 is installed on the automobile chassis 1 through a slewing support and a hydraulic slewing drive. The hydraulic slewing drive is connected to the control valve group of the vehicle-mounted hydraulic pump station through a hydraulic pipeline. The lifting winch and counterweight are installed on the turntable 2.

[0023] The tower body 3 includes a lower tower body and an upper tower body. The bottom end of the lower tower body is hingedly mounted on the turntable 2 and is located in front of the counterweight. The length of the automobile chassis 1 is smaller than the length of the lower tower body. The top rear end of the lower tower body is hingedly mounted to the bottom rear end of the upper tower body, and a tower body folding device including a tower body folding hydraulic cylinder and a tower body folding connecting rod mechanism is provided between the lower tower body and the upper tower body. The tower body folding hydraulic cylinder is connected to the control valve group of the vehicle-mounted hydraulic pump station through a hydraulic pipeline. The top of the upper tower body is also provided with a guide rope support rod 31 fixedly mounted thereto.

[0024] The folding boom 4 includes a rear folding arm 41 and a front folding arm 42. The lower rear end of the rear folding arm 41 is hingedly connected to the top front end of the upper tower body, and the rear end of the rear folding arm 41 is provided with a mast 43 fixedly connected to the rear end of the rear folding arm 41 and obliquely extended. The top of the mast 43 is connected to the turntable 2 through a pulling wire rope, and the top of the mast 43 is connected to the front top of the rear folding arm 41 through a pulling wire rope. Figure 3 、 Figure 4 As shown, the front middle portion of the rear folding arm 41 is hingedly connected to the rear middle portion of the front folding arm 42 to form a hinge point D. The luffing device including the luffing winch and the luffing trolley is installed on the rear folding arm 41, and the hook assembly is set on the luffing trolley. The rear folding arm 41 and the front folding arm 42 are provided with rails for the luffing trolley to move forward and backward, and can be folded and connected when unfolded.

[0025] like Figure 3 、 Figure 4 As shown, the boom folding device 5 is arranged between the front folding arm 42 and the rear folding arm 41, and includes a boom connecting rod mechanism 51 and a boom folding hydraulic cylinder 52; the boom folding hydraulic cylinder 52 is arranged in front of the rear folding arm 41, and the bottom end of the cylinder body is hingedly connected to the rear folding arm 41, and the boom folding hydraulic cylinder 52 is connected to the control valve group of the vehicle-mounted hydraulic pump station through a hydraulic pipeline; the boom connecting rod mechanism 51 is a triangular structure or as shown in FIG. Figure 3 In the horizontal U-shaped structure shown, the boom linkage mechanism 51 is hingedly connected to the telescopic end of the boom folding hydraulic cylinder 52 to form a hinge point A. The boom linkage mechanism 51 includes a front folding arm link 511 and a rear folding arm link 512. One end of the front folding arm link 511 is hingedly installed inside the front folding arm 42 to form a hinge point B, and one end of the rear folding arm link 512 is hingedly installed inside the rear folding arm 41 to form a hinge point C. When in the folded state, the front folding arm 42 is buckled on the rear folding arm 41, as shown in FIG. Figure 3 As shown, the hinge point A is located behind the hinge point B and the hinge point C, and the distance between the hinge point A and the hinge point B is smaller than the distance between the hinge point A and the hinge point C.

[0026] When the self-moving fast erection tower crane is in the fully folded transfer state, Figure 1As shown, the tower body, folding boom and mast are all in a horizontal state, the tower body folding hydraulic cylinder is in a fully retracted state, the boom folding hydraulic cylinder 52 is in a fully retracted state, the front folding arm 42 is buckled on top of the rear folding arm 41, the upper tower body is stacked on top of the lower tower body, and the retractable hydraulic telescopic legs are in a fully retracted state. At this time, the whole machine is carried by the automobile chassis 1. Since the length of the automobile chassis 1 is smaller than the length of the lower tower body, the whole machine can be moved autonomously without increasing the overall length, and the driver can perform transfer driving operations. Since the front folding arm 42 is buckled on top of the rear folding arm 41 instead of being stacked on top of the rear folding arm 41, the height dimension of the whole machine in the folded state can be reduced compared to the traditional fully stacked structure, thereby lowering the center of gravity of the whole machine and increasing the driving stability during autonomous movement.

[0027] After transferring to the working position, first control the vehicle-mounted hydraulic pump station to extend the retractable hydraulic telescopic legs and firmly support them on the ground, and then the deployment operation can be carried out; Figure 5 As shown, during the deployment operation, the control valve group is used to control the piston end of the boom folding hydraulic cylinder 52 to extend. During the extension process of the boom folding hydraulic cylinder 52, the boom connecting rod mechanism 51 is driven to flip around the hinge point C. At the same time, the front folding arm connecting rod 511 pushes the front folding arm 42 to flip and open along the hinge point D. After the front folding arm 42 and the rear folding arm 41 form a set acute angle, the piston end of the boom folding hydraulic cylinder 52 is controlled to pause and retract; then the control valve group is used to control the tower body folding hydraulic cylinder to extend. During the extension process, the piston end of the tower body folding hydraulic cylinder causes the upper tower body to rotate and flip out along the hinge center of the upper tower body and the lower tower body through the tower body folding connecting rod mechanism. As the tower body folding hydraulic cylinder continues to extend, the traction wire rope is gradually straightened under the support of the mast 43 and the guide rope support rod 31, and assists in pulling the lower tower body. While the tower body 3 is flipping, the guide rope Finally, the control valve group is used to control the piston end of the boom folding hydraulic cylinder 52 to continue to extend so that the front folding arm 42 rotates along the hinge point between the front folding arm 42 and the rear folding arm 41 and continues to fold and open until the rear end surface of the front folding arm 42 is connected to the front end surface of the rear folding arm 41. Figure 2After the self-mobile rapid erection tower crane is fully deployed, the turntable 2 can be controlled by the remote control to rotate, the hoisting winch device drives the lifting and lowering of the hook group, and the luffing device drives the luffing trolley to move back and forth.

[0028] When folding and storing after completing the work, reverse the above unfolding steps to complete the folding, and then you can drive to the next location.

[0029] In order to achieve stable flipping of the front folding arm 42, as a further improvement of the present invention, a folding arm flipping guide structure is provided between the rear folding arm 41 and the front folding arm 42. The folding arm flipping guide structure can adopt a matched guide groove and guide pin structure, or can adopt other guide structures such as a matched guide roller and guide wheel structure.

[0030] As an embodiment of the present invention, Figure 3 、 Figure 4 As shown, the folding arm flip guide structure includes a semicircular guide groove arranged on the front folding arm 42 corresponding to the hinge point D and a guide pin fixedly arranged on the rear folding arm 41.

[0031] In order to achieve a more stable end-face fitting connection between the rear folding arm 41 and the front folding arm 42 after the self-moving rapid erection tower crane is fully unfolded, as a further improvement scheme of the present invention, the rear folding arm 41 and the front folding arm 42 are provided with mutually cooperating end-face safety locking devices, which can be locked after the end faces of the rear folding arm 41 and the front folding arm 42 are fitted together, thereby ensuring a more stable connection.

[0032] As an embodiment of the end face safety lock device of the present invention, the end face safety lock device is a latch mechanism arranged inside the folding boom and perpendicular to the end face. Since the folding trajectory of the rear folding arm 41 and the front folding arm 42 is an arc trajectory, an excessively long latch mechanism will cause plug interference, while an excessively short latch mechanism will not provide a stable plug connection. Therefore, the latch mechanism includes a telescopic control component and a latch. The telescopic control component is fixedly installed inside the folding boom, and the telescopic end of the telescopic control component is connected to the bottom end of the latch. When the end faces are aligned during the unfolding operation, the telescopic control component can be controlled to extend to push out the latch to complete the locking. Before the folding and storage operation, the telescopic control component can be controlled to retract to withdraw the latch to complete the unlocking.

Claims

1. A boom folding device for a fast-erecting tower crane, wherein the folding boom (4) of the fast-erecting tower crane comprises a rear folding arm (41) and a front folding arm (42), characterized in that: The front middle portion of the rear folding arm (41) is hingedly connected to the rear middle portion of the front folding arm (42) to form a hinge point D; The boom folding device (5) is arranged between the front folding arm (42) and the rear folding arm (41), and includes a boom connecting rod mechanism (51) and a boom folding hydraulic cylinder (52); the boom folding hydraulic cylinder (52) is arranged in front of the rear folding arm (41), and the bottom end of the cylinder body is hingedly connected to the rear folding arm (41); the boom connecting rod mechanism (51) is a triangular structure or a horizontally placed U-shaped structure, and the boom connecting rod mechanism (51) and the telescopic end of the boom folding hydraulic cylinder (52) are hingedly installed to form a hinge point A. 1) It comprises a front folding arm connecting rod (511) and a rear folding arm connecting rod (512), one end of the front folding arm connecting rod (511) is hingedly mounted inside the front folding arm (42) to form a hinge point B, and one end of the rear folding arm connecting rod (512) is hingedly mounted inside the rear folding arm (41) to form a hinge point C. In the folded state, the front folding arm (42) is buckled on the rear folding arm (41), and the hinge point A is located behind the hinge point B and the hinge point C, and the distance between the hinge point A and the hinge point B is smaller than the distance between the hinge point A and the hinge point C.

2. The boom folding device for a fast-erecting tower crane according to claim 1, characterized in that: A folding arm turning guide structure is also provided between the rear folding arm (41) and the front folding arm (42).

3. The boom folding device for a fast-erecting tower crane according to claim 2, characterized in that: The folding arm flip guide structure comprises a semicircular guide groove arranged on the front folding arm (42) at a position corresponding to the hinge point D and a guide pin fixedly arranged on the rear folding arm (41).

4. The boom folding device for a fast-erecting tower crane according to claim 1, characterized in that: A mutually matched end face safety locking device is provided between the rear folding arm (41) and the front folding arm (42).

5. The boom folding device for a fast-erecting tower crane according to claim 4, characterized in that: The end face safety locking device is a latch mechanism arranged inside the folding boom and perpendicular to the end face. The latch mechanism includes a telescopic control component and a latch. The telescopic control component is fixedly installed inside the folding boom, and the telescopic end of the telescopic control component is connected to the bottom end of the latch.

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