A trackless gantry crane based on multi-point leveling

Abstract

The utility model provides a kind of trackless portal crane based on multi-point leveling, including the main beam being installed in the top of two crane chassis by support leg, first running wheel is installed in one side of crane chassis bottom, first running wheel is connected with driving motor, second running wheel is installed in the opposite side of crane chassis bottom with first running wheel, each crane chassis bottom is installed with telescopic support assembly, and the number of telescopic support assembly is greater than or equal to 2, telescopic support assembly is used to replace first running wheel, second running wheel intermittently to support crane chassis on ground, to complete the support of the trackless crane of the application on ground.The trackless crane of the application changes the state of multiple telescopic support assemblies when carrying out lifting operation, to replace first running wheel, second running wheel is supported on ground, and each telescopic support assembly is independently adjusted, so that the application meets the application under uneven ground conditions.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a trackless gantry crane based on multi-point leveling. Background Technology

[0002] Currently, trackless gantry cranes used indoors generally suffer from the following technical problems: (1) Poor ground adaptability: When the indoor ground is uneven, the crane is prone to tilting during operation; (2) Traditional leveling methods are inefficient: adjusting the height using shims is cumbersome. (3) Lack of effective leveling mechanism: Existing trackless cranes mostly rely on tire support. When the tire load is inconsistent during operation, the tire deformation will be inconsistent, resulting in insufficient stability.

[0003] While some electric leveling solutions exist, they are complex in structure and expensive. Therefore, there is an urgent need for a leveling solution that is simple in structure and easy to operate. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a trackless gantry crane based on multi-point leveling. During lifting operations, the extension and retraction states of multiple retractable support components are changed to replace the first and second travel wheels in supporting the ground. Each retractable support component is independently adjustable to meet application requirements on uneven ground, resulting in good stability during operation. To achieve the above technical features, the purpose of this utility model is as follows: A trackless gantry crane based on multi-point leveling includes a main beam mounted on the top of two crane chassis via outriggers. A first travel wheel is mounted on one side of the bottom of each crane chassis and is connected to a drive motor. A second travel wheel is mounted on the bottom of each crane chassis opposite to the first travel wheel. Each crane chassis has a retractable support assembly mounted on its bottom, and the number of retractable support assemblies is greater than or equal to 2.

[0005] The retractable support assembly includes a threaded sleeve vertically mounted on the crane chassis, and a support screw is fitted inside the threaded sleeve.

[0006] A support plate is installed at the bottom end of the support screw.

[0007] The transmission thread between the support screw and the threaded sleeve is a trapezoidal thread.

[0008] The retractable support assembly includes a hydraulic cylinder vertically mounted on the crane chassis, and the telescopic end of the hydraulic cylinder is connected to the support plate.

[0009] There are two retractable support components, which are respectively distributed on the outer sides of the first driving wheel and the second driving wheel.

[0010] A leveling device is installed on the top of one or both of the crane chassis.

[0011] The second traveling wheel is a swivel wheel.

[0012] This utility model includes a main beam mounted on the top of two crane chassis via outriggers. A first traveling wheel is mounted on one side of the bottom of each crane chassis and is connected to a drive motor. A second traveling wheel is mounted on the bottom of the crane chassis opposite to the first traveling wheel. Each crane chassis has at least two retractable support components mounted on its bottom. These retractable support components intermittently replace the first and second traveling wheels to support the crane chassis on the ground, thus providing ground support for the trackless crane of this application. During lifting operations, the trackless crane of this application changes the state of multiple retractable support components to replace the first and second traveling wheels in supporting the ground. Each retractable support component is independently adjustable, and the crane chassis is leveled through multi-point adjustment, enabling the application in uneven ground conditions. When the crane needs to be moved after the operation is completed, the retractable support components are released from the ground, and the first and second traveling wheels then support the ground, enabling movement. One or both crane chassis are equipped with a leveling device on top to facilitate rapid leveling of the crane chassis, thereby improving operational efficiency and ensuring the stability of the leveling operation. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 A schematic diagram of the structure of the first trackless gantry crane based on multi-point leveling provided for the embodiments of this utility model; Figure 2 A schematic diagram of the structure of a second type of multi-point leveling trackless gantry crane provided in an embodiment of this utility model; Figure 3 A structural schematic diagram of a retractable support component provided in an embodiment of this utility model; Figure 4 A schematic diagram showing the installation position of the leveling device provided in this embodiment of the utility model; In the diagram: 1. Outrigger; 2. Crane chassis; 3. First traveling wheel; 4. Second traveling wheel; 5. Telescopic support assembly; 5a. Threaded sleeve; 5b. Support screw; 5c. Support plate; 5d. Rotary handle; 6. Leveling device; 7. Main beam. Detailed Implementation

[0015] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0016] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: See appendix Figure 1-4 A trackless gantry crane based on multi-point leveling includes a main beam mounted on top of two crane chassis 2 via outriggers 1. A first traveling wheel 3 is mounted on one side of the bottom of each crane chassis 2, and the first traveling wheel 3 is connected to a drive motor. A second traveling wheel 4 is mounted on the bottom of each crane chassis 2 opposite to the first traveling wheel 3. Each crane chassis 2 has two or more retractable support components 5 mounted on its bottom. The retractable support components 5 are used to intermittently replace the first traveling wheel 3 and the second traveling wheel 4 to support the crane chassis 2 on the ground, thus achieving ground support for the trackless crane of this application. Existing trackless cranes mostly rely on tire support. However, due to inconsistent tire loads during operation, inconsistent tire deformation occurs, resulting in insufficient stability. This application's trackless crane, during lifting operations, modulates the extension / retraction state of multiple retractable support components 5 to replace the first travel wheel 3 and second travel wheel 4 in supporting the ground. Each retractable support component 5 is independently adjustable, achieving leveling of the crane chassis 2 through multi-point adjustment. This allows the application to operate on uneven ground with good stability. When the crane needs to be moved after the operation is completed, the retractable support components 5 are released from the ground, at which point the first travel wheel 3 and second travel wheel 4 support the ground, enabling movement. Therefore, this application features a simple, stable, and reliable structure, low maintenance costs, convenient operation, high leveling efficiency, adaptability to different ground conditions, and a significant cost advantage.

[0017] In one embodiment, the retractable support assembly 5 includes a threaded sleeve 5a vertically mounted on the crane chassis 2, and a support screw 5b is fitted inside the threaded sleeve 5a. By rotating the support screw 5b, the retractable action can be achieved to achieve the effect of leveling and supporting. To facilitate the rotation operation of the support screw 5b, a rotating handle 5d is installed on its top.

[0018] In one embodiment, a support plate 5c is installed at the bottom end of the support screw 5b to increase the contact area with the ground and provide anti-slip function.

[0019] As one implementation method, in this embodiment, since trapezoidal thread transmission has the characteristics of high transmission efficiency, good centering, high tooth root strength and self-locking, the transmission thread between the support screw 5b and the threaded sleeve 5a is a trapezoidal thread.

[0020] In one embodiment, the retractable support assembly includes a hydraulic cylinder vertically mounted on the crane chassis 2, and the telescopic end of the hydraulic cylinder is connected to the support plate.

[0021] In one embodiment, the number of retractable support components 5 is two, and the two retractable support components 5 are respectively distributed on the outside of the first driving wheel 3 and the second driving wheel 4. By setting the retractable support components 5 on the outside of the first driving wheel 3 and the second driving wheel 4, it is convenient for the operator.

[0022] As one implementation method, in this embodiment, a leveling device 6 is installed on the top of one or two of the crane chassis 2 to facilitate the rapid leveling of the crane chassis 2, thereby improving operational efficiency and ensuring the stability of the leveling operation.

[0023] In one implementation, the second driving wheel 4 is a swivel wheel to facilitate the steering and movement of this application.

Claims

1. A trackless gantry crane based on multi-point leveling, comprising a main beam mounted on the top of two crane chassis via outriggers, a first traveling wheel mounted on one side of the bottom of the crane chassis, the first traveling wheel being connected to a drive motor, and a second traveling wheel mounted on the bottom of the crane chassis opposite to the first traveling wheel, characterized in that: Each of the crane chassis is equipped with a retractable support assembly at its bottom, and the number of the retractable support assemblies is greater than or equal to 2.

2. A trackless gantry crane based on multi-point leveling according to claim 1, characterized in that: The retractable support assembly includes a threaded sleeve vertically mounted on the crane chassis, and a support screw is fitted inside the threaded sleeve.

3. A trackless gantry crane based on multi-point leveling according to claim 2, characterized in that: A support plate is installed at the bottom end of the support screw.

4. A trackless gantry crane based on multi-point leveling according to claim 3, characterized in that: The transmission thread between the support screw and the threaded sleeve is a trapezoidal thread.

5. A trackless gantry crane based on multi-point leveling according to claim 1, characterized in that: The retractable support assembly includes a hydraulic cylinder vertically mounted on the crane chassis, and the telescopic end of the hydraulic cylinder is connected to the support plate.

6. A trackless gantry crane based on multi-point leveling according to claim 1, characterized in that: There are two retractable support components, which are respectively distributed on the outer sides of the first driving wheel and the second driving wheel.

7. A trackless gantry crane based on multi-point leveling according to claim 1, characterized in that: A leveling device is installed on the top of one or both of the crane chassis.

8. A trackless gantry crane based on multi-point leveling according to claim 1, characterized in that: The second traveling wheel is a swivel wheel.

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