A vehicle-mounted truss gantry crane

Abstract

The present invention relates to an on-vehicle truss gantry crane, which includes at least four telescopic truss structures, and further includes: a truck (11) for accommodating and supporting the telescopic truss structures; a reinforcing truss structure for strengthening the telescopic truss structures after lapping; a hoisting trolley (10) for performing hoisting operations; the cross-sectional dimensions of each section of the telescopic truss structure gradually decrease from the first section to the last section, and can be concentrically placed in the center of the first section structure; wherein, adjacent truss structures are slidably connected, the (M-1)th truss structure is rotatably connected to the Mth truss structure, and the Nth truss structure is rotatably connected to the (N+1)th truss structure, and 2<M<N-1. Compared with the prior art, the present invention has the advantages of strong mobility, light self-weight, strong safety, better structural stability, etc.

Description

Technical Field

[0001] The invention relates to the field of machinery, and in particular to a vehicle-mounted truss-type gantry crane. Background Art

[0002] At present, there is a blank in the research on vehicle-mounted truss gantry cranes at home and abroad. Scholars have conducted extensive research on the jib structures of truss gantry cranes, tower cranes, and crawler cranes. These three fields are also widely used in engineering. With the continuous development of my country's economy, the improvement of people's living standards, and the strengthening of infrastructure construction, the demand for domestic engineering cranes has increased significantly. According to the structural form of the crane itself, common cranes are divided into wheeled cranes, crawler cranes, tower cranes, cranes, gantry cranes, reach cranes and other lifting products. There are many professional crane manufacturers at home and abroad, such as XCMG, Sany Heavy Industry, Zoomlion, Liebherr, Terex, Manitowoc, Kobelco, etc. However, there is no professional lifting equipment for rescue work such as earthquake relief, house collapse, and highway accidents.

[0003] At present, vehicle-mounted cranes are widely used in earthquake relief, house collapse, highway rescue, and industrial production due to their strong maneuverability. However, the farther the arm of a vehicle-mounted crane is extended, the smaller the lifting weight is. It is also not a stable structure, and improper operation may even cause safety accidents. Gantry cranes are widely used in industrial production and life, such as freight yards, shipyards, etc., and the lifting tonnage of gantry cranes is large, which can reach several thousand tons. Gantry cranes have a stable structure and are safer than cantilever cranes. However, gantry cranes require the laying of ground guide rails, which greatly limits their scope of use. In addition, large-tonnage gantry cranes have a large structure after installation and are not easy to transport. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a vehicle-mounted truss gantry crane with strong maneuverability, light weight, strong safety and better structural stability.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The present invention takes into account that the truss gantry crane has good structural stability, light weight, good wind resistance and low cost, so a vehicle-mounted truss gantry crane can be designed, which can provide stable lifting force within the working space and can also be quickly maneuvered over a large range, and thus can be widely and effectively used in earthquake relief, house collapse, highway accidents, wind power installation, construction, military lifting, fire safety and other work. The specific scheme is as follows:

[0007] A vehicle-mounted truss gantry crane, the gantry crane comprises at least four telescopic truss structures, and further comprises:

[0008] A load carrier for receiving and supporting the retractable truss structure;

[0009] A removable reinforced truss structure is used to reinforce the retractable truss structure after the overlap is completed;

[0010] Hoisting trolley, used for hoisting operations;

[0011] The cross-sectional size of each section of the telescopic truss structure decreases from the first section to the last section, and can be placed concentrically in the center of the first section structure; wherein adjacent truss structures are slidably connected, the M-1 section truss structure is rotatably connected to the M section, the N section truss structure is rotatably connected to the N+1 section, and 2 <M<N-1;

[0012] During the lifting operation, the first section of the truss structure is connected to the load-carrying vehicle, and the last section is in contact with the ground; the reinforced truss structure is fixedly connected to the retractable truss structure after the overlap is completed, and the lifting trolley is slidably connected to the reinforced truss structure.

[0013] Furthermore, the M-1 section truss structure is a three-sided C-shaped structure, and the M-section truss structure is rotationally connected to the missing side of the M-1 section;

[0014] The Nth truss structure is a three-sided C-shaped structure, and the N+1th truss structure is rotationally connected to the missing side of the Nth truss.

[0015] Furthermore, a light motor and / or pulley is installed between each truss structure to achieve the expansion and / or rotation of the structure. Guide rails, pulleys and steel cables are also laid, and the expansion and contraction and overlap of the structure are achieved through the power provided by the motor.

[0016] Furthermore, the bottom of the M-th truss structure is connected to the top of the M-2 section through a hinge, and the top of the M-th truss structure is connected to the M-1 section through a steel cable. The steel cable passes over the pulley at the top of the M-1 truss structure and is connected to the motor. During the ascent of the M-1 and M-th truss structures, the steel cable is in a braking state. After the truss structure rises to its position, the steel cable brake is released, and the M-th truss structure is slowly lowered to a horizontal position under the traction of gravity and the steel cable and fixed.

[0017] Furthermore, a hinge is provided in the N+1th truss structure to connect with the Nth section, and the bottom of the N+1th truss structure is connected with the Nth section through a steel cable. A steel cable is provided at the bottom of the N+1th truss structure to bypass the pulley at the bottom of the Nth section and connect with the motor. During the extension of the Nth truss structure, the N+1th truss structure and the Nth section remain coaxially overlapped, and the steel cable is under braking. After the Nth truss structure is fully extended and locked. The braking of the N+1th steel cable is relieved, and the N+1th truss structure is slowly released to a vertical position under gravity and the traction of the steel cable.

[0018] Furthermore, the reinforced truss structure includes a transverse reinforcement structure and a vertical reinforcement structure. During the lifting operation, the transverse reinforcement structure is fixedly connected to at least the Mth truss structure, and the vertical reinforcement structure is fixedly connected to at least the N+1th truss structure.

[0019] Furthermore, the hoisting trolley is provided with one or more and is slidably connected to the transverse reinforcement structure.

[0020] Furthermore, the truck includes a power device for providing power for the contraction and / or lifting operation of the truss structure, and also includes a guide rail and a hydraulic device for adjusting the posture of the truss structure during transportation and lifting.

[0021] Furthermore, lifting columns as load-bearing structures are arranged on both sides of the truck, and holes are reserved for the lifting columns to pass through, so that the overall stability of the device can be ensured within a small working surface, and during the lifting operation, the lifting columns are lowered to stabilize the vehicle body while guiding the load of the lifting operation to the ground.

[0022] Furthermore, the truck also includes support legs to ensure the overall stability of the device when the working surface is large.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) The present invention has good structural stability and strong safety, and can provide stable lifting force within the working space;

[0025] (2) The present invention has strong mobility and can be widely used in complex working conditions such as earthquake relief, house collapse, highway rescue, wind power installation, building construction, military hoisting, fire safety, etc.;

[0026] (3) The present invention has the advantages of light weight and good wind resistance while achieving large-load lifting; and has a low cost and is convenient for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the gantry crane in the working state in the embodiment;

[0028] Figure 2 It is a structural schematic diagram of the gantry crane without a reinforcement structure after the gantry crane is extended in the embodiment;

[0029] Figure 3 It is a front view of the working state in the embodiment;

[0030] Figure 4 It is a front view of the gantry crane in the embodiment after the gantry crane is fully extended without the reinforcement structure;

[0031] Numbers in the figure are as follows: first section truss structure 1, second section truss structure 2, third section truss structure 3, fourth section truss structure 4, fifth section truss structure 5, sixth section truss structure 6, seventh section truss structure 7, eighth section truss structure 8, ninth section truss structure 9, lifting trolley 10, truck 11, first section reinforced truss structure 12, second section reinforced truss structure 13, third section reinforced truss knot 14, fourth section reinforced truss structure 15, fifth section reinforced truss structure 16, sixth section reinforced truss knot 17. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example

[0034] A vehicle-mounted truss gantry crane, such as Figure 1-4 The main structure of the gantry crane includes 9 retractable truss structures of different sizes and 6 reinforced truss structures. It also includes a driver's cab, i.e., an operating table for hoisting operations, a hoisting trolley 10 and a hook.

[0035] The internal dimension of the first truss structure 1 is slightly larger than the external dimension of the second truss structure 2. A pulley is provided inside the first truss structure 1 to limit the position of the second truss structure 2, so that the second truss structure 2 can slide inside the first truss structure 1. Similarly, the third truss structure 3 can slide inside the second truss structure 2, similarly, the fourth truss structure 4 can slide inside the third truss structure 3, similarly, the fifth truss structure 5 can slide inside the fourth truss structure 4, similarly, the sixth truss structure 6 can slide inside the fifth truss structure 5, similarly, the seventh truss structure 7 can slide inside the sixth truss structure 6, similarly, the eighth truss structure 8 can slide inside the seventh truss structure 7, and similarly, the ninth truss structure 9 can slide inside the eighth truss structure 8. The 9-section telescopic truss structure can be placed concentrically in the center of the largest section structure, and each section is equipped with pulleys and steel cables, and is paved with guide rails to facilitate telescoping. The front end of the third truss structure 3 and the end of the seventh truss structure 7 are equipped with lightweight motors for adjusting the rotation of the structure during telescoping and for adjusting the bending moment on the main beam.

[0036] The first section reinforcement truss structure 12, the second section reinforcement truss structure 13 and the third section reinforcement truss knot 14 have the same size and form a vertical reinforcement structure. The fourth section reinforcement truss structure 15, the fifth section reinforcement truss structure 16 and the sixth section reinforcement truss knot 17 have the same size and form a vertical and horizontal reinforcement structure, and there are trolley sliding guide rails on the outside.

[0037] The third truss structure 3 is a three-sided C-shaped structure, and the fourth truss structure 4 can rotate in the default one-side direction. Figure 3As shown, the third truss structure 3 is vacant on the right side. Meanwhile, the sixth truss structure 6 is a three-sided C-shaped structure, and the seventh truss structure 7 can rotate in the default one-side direction. Figure 3 As shown, the upper side of the sixth truss structure 6 is vacant.

[0038] The truck 11 is equipped with power devices such as motors and winches, which provide power for the extension and contraction of the retractable truss structure and the lifting operation. Guide rails and hydraulic devices are laid on the back to adjust the posture of the truss structure during transportation and lifting. Lifting columns are deployed on both sides of the vehicle body as load-bearing structures, which can ensure the overall stability of the device within a small working surface. When the working surface is larger, the supporting legs can also be propped up to ensure the overall stability of the device.

[0039] The retractable truss structure is placed horizontally on the back of the truck 11 during transportation, with guide rails, pulleys and steel cables laid inside, and lightweight motors deployed at the "joints". The power provided by the motors on the truck body is used to complete the extension and overlap of the structure; the reinforced truss structure is used to reinforce the small ends of the gantry crane main beam and the retractable truss structure after the overlap is completed, and serves as the latter's main load-bearing structure;

[0040] During transportation, the telescopic truss structure is placed horizontally along the axial direction in the center of the back of the vehicle body, and the bottom is connected to the hydraulic rod and the guide rails laid along the axial direction in the center of the vehicle body through sleeves and rollers. The vehicle body of the truck 11 is arranged with power devices such as motors, winches and lifting columns from the center to both sides. At the same time, a hole is reserved on the back of the shelf for the lifting column to pass through. During the lifting operation, the lifting column is lowered to stabilize the vehicle body while guiding the load of the lifting operation to the ground.

[0041] In this embodiment, the device participates in the rescue of a collapsed house. The truck 11 arrives near the rescue site, determines the position of the heavy object to be lifted, draws a circle with the geometric center of gravity of the heavy object as the center and the horizontal span of the gantry crane when it is fully extended as the diameter, finds a relatively flat position on the circumference as the parking point of the truck 11, and fixes it through the load-bearing structure on the side of the vehicle to keep the back of the vehicle horizontal. At the beginning, the retractable truss structure is in a horizontal state to ensure the transportability of the gantry crane.

[0042] After the truck 11 is in place and the posture of the truck body is adjusted, the engine of the truck 11 drives the hydraulic pump to lift the main structure of the gantry crane through the hydraulic cylinder to make it vertical. At this time, all the basic structures of the gantry crane are stored in the first truss structure 1.

[0043] Under the action of the motor, the second truss structure section extends upward first, and the third truss structure section 3 and the fourth truss structure section 4 extend upward synchronously thereafter. The bottom of the fourth truss structure section 4 is connected to the top of the second truss structure section 2 through a hinge, and the top of the fourth truss structure section 4 is connected to a steel cable, which passes over the pulley at the top of the third truss structure section 3 and is connected to the motor. During the ascent of the third truss structure section 3 and the fourth truss structure section 4, the steel cable is in a braking state. After the third truss structure section 3 and the fourth truss structure section 4 are raised to their positions, the steel cable brake is released, and the fourth truss structure section 4 is slowly lowered to a horizontal position under the traction of gravity and the steel cable, and is fixed.

[0044] After the fourth truss structure 4 is placed in a horizontal position, the fifth truss structure 5 and the sixth truss structure 6 are extended and locked in sequence under the drive of the motor. The tops of the fourth truss structure 4 and the fifth truss structure 5 are respectively connected with steel cables, which pass through the pulleys on the top of the third truss structure 3 and are connected to the motor. The steel cables are used to balance the gravity components of the fourth truss structure 4 and the fifth truss structure 5 to reduce the wear and friction of the slide rails.

[0045] The seventh truss structure 7 is provided with a hinge at 1 / 3 of the distance from one end to connect with the sixth truss structure 6, and a steel cable is provided at the corresponding end to pass around the pulley at the bottom of the sixth truss structure 6 and connect with the motor. During the extension of the sixth truss structure 6, the seventh truss structure 7 and the sixth truss structure 6 remain coaxially overlapped, and the steel cable is under braking. After the sixth truss structure 6 is fully extended and locked. The braking of the steel cable of the seventh truss structure 7 is relieved, and the seventh truss structure 7 is slowly released to the vertical position under the traction of gravity and the steel cable. After the seventh truss structure 7 is in place, the eighth truss structure 8 and the ninth truss structure 9 are extended downward in turn under the drive of the motor to complete the erection of the main structure of the vehicle-mounted truss gantry crane.

[0046] Then, the vertical high-strength first-section reinforced truss structure 12, the second-section reinforced truss structure 13 and the third-section reinforced truss knot 14 are hoisted in sequence on the gantry crane, and fixed together with the truss structure formed by the seventh-section truss structure 7, the eighth-section truss structure 8 and the ninth-section truss structure 9. Then, the transverse fourth-section reinforced truss structure 15, the fifth-section reinforced truss structure 16 and the sixth-section reinforced truss knot 17 are hoisted in sequence, and fixed together with the truss structure formed by the fourth-section truss structure 4, the fifth-section truss structure 5 and the sixth-section truss structure 6.

[0047] The hoisting trolley 10 is hoisted onto the guide rail of the truss structure formed by the transverse fourth section reinforced truss structure 15, the fifth section reinforced truss structure 16 and the sixth section reinforced truss structure 17. The hoisting trolley 10 can be one group or multiple groups. The hook of the hoisting trolley 10 is lowered from the main beam of the gantry crane, and the detachable driver's cab is raised to the top of the second section truss structure 2 through the side guide rails of the first section truss structure 1 and the second section truss structure 2, and the heavy object hoisting work can be carried out.

[0048] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A vehicle-mounted truss gantry crane, characterized in that: The gantry crane includes at least four telescopic truss structures, and also includes: A load-carrying vehicle (11) for accommodating and supporting the telescopic truss structure; A detachable reinforcing truss structure for strengthening the telescopic truss structure after lapping; A hoisting trolley (10) for performing hoisting operations; The cross-sectional dimension of each section of the telescopic truss structure gradually decreases from the first section to the last section and is concentrically placed in the center of the first section structure; among them, adjacent truss structures are slidably connected, the (M - 1)th section of the truss structure is also rotatably connected to the Mth section, and the Nth section of the truss structure is also rotatably connected to the (N + 1)th section, and 2 < M < N - 1; the (M - 1)th section of the truss structure is a three-sided C-shaped structure, and the Mth section of the truss structure is rotatably connected to the side where the (M - 1)th section is missing; The Nth section of the truss structure is a three-sided C-shaped structure, and the (N + 1)th section of the truss structure is rotatably connected to the side where the Nth section is missing; during hoisting operations, the first section of the truss structure is connected to the load-carrying vehicle (11), and the last section abuts against the ground; the reinforcing truss structure is fixedly connected to the telescopic truss structure after lapping, and the hoisting trolley (10) is slidably connected to the reinforcing truss structure; The load-carrying vehicle (11) includes a power device for providing power for the contraction and / or hoisting operations of the truss structure, and also includes a guide rail and a hydraulic device for adjusting the attitude of the truss structure during transportation and hoisting.

2. A vehicle-mounted truss gantry crane according to claim 1, characterized in that: A lightweight motor and / or pulley for completing the expansion / contraction and / or rotation of the structure is installed between each section of the truss structure.

3. The vehicle-mounted truss gantry crane according to claim 1, characterized in that: The reinforcing truss structure includes a transverse reinforcing structure and a vertical reinforcing structure. During hoisting operations, the transverse reinforcing structure is fixedly connected to at least the Mth section of the truss structure, and the vertical reinforcing structure is fixedly connected to at least the (N + 1)th section of the truss structure.

4. The vehicle-mounted truss gantry crane according to claim 3, characterized in that: One or more hoisting trolleys (10) are provided and are slidably connected to the transverse reinforcing structure.

5. The vehicle-mounted truss gantry crane according to claim 1, characterized in that: Lifting columns serving as load-bearing structures are deployed on both sides of the load-carrying vehicle (11), and pores for the lifting columns to pass through are reserved.

6. The vehicle-mounted truss gantry crane according to claim 1, characterized in that: The load-carrying vehicle (11) also includes support legs for ensuring the overall stability of the device within a large working surface range.

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