Liftable small gantry crane

Abstract

The utility model relates to hoisting machinery equipment technical field provides a kind of liftable stretching small gantry crane, comprising: girder, including the first beam body and second beam body by the sleeve structure sliding sleeve connection;Two columns, respectively set in the both ends of girder, each column includes the first column body and second column body by the sleeve structure sliding sleeve connection;Locking member, set on sleeve structure, for locking the telescopic state of girder or column;At least one sliding block, set on girder, the bottom of sliding block is provided with lifting ring, the upper of sliding block is provided with locking bolt, locking bolt is used to compress and fix sliding block on girder;Bottom crossbeam, fixedly connected to the bottom of two columns;Inclined support rod, one end is fixedly connected to the side wall of column, the other end is fixedly connected to the end of bottom crossbeam;With compact structure, the characteristics of convenient adjustment, wide application range.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery and equipment, specifically to a small gantry crane that can be lifted and stretched. Background Technology

[0002] In industrial production and equipment handling, small gantry cranes are widely used due to their simple structure and ease of movement. However, most existing small gantry cranes are typically fixed structures or have only limited lifting capabilities. Their span and height are fixed at the factory and cannot be flexibly adjusted according to changes in the on-site work space or the size of the equipment to be lifted. This is particularly inconvenient when dealing with equipment of varying sizes or needing to traverse doorways and passageways of different sizes. To meet different operational needs, users often need to equip themselves with multiple specifications of gantry cranes, which not only increases equipment procurement costs but also occupies more storage space and leads to cumbersome on-site switching, reducing work efficiency. Therefore, the market urgently needs a compact, easily adjustable, and widely applicable adjustable gantry crane to overcome the shortcomings of existing technology. Utility Model Content

[0003] The purpose of this utility model is to provide a liftable and extendable small gantry crane to solve the problems of existing small gantry cranes, which have a narrow range of application for a single unit due to their fixed size, cannot flexibly adapt to changing operation scenarios, and require multiple units to meet different needs, resulting in high cost, large footprint, and low efficiency.

[0004] To achieve the above objectives, the present invention provides a liftable and extendable small gantry crane, which adopts the following technical solution: A liftable and extendable miniature gantry crane, comprising: The main beam includes a first beam and a second beam that are slidably connected by a sleeve structure; Two columns are respectively set at both ends of the main beam, and each column includes a first column and a second column that are slidably connected by a sleeve structure; A locking element is provided on the sleeve structure to lock the telescopic state of the main beam or the column; At least one slider is disposed on the main beam, a lifting ring is provided at the bottom of the slider, and a locking bolt is provided on the upper part of the slider, the locking bolt being used to press and fix the slider to the main beam; The bottom crossbeam is fixedly connected to the bottom of the two columns; The diagonal support rod is fixedly connected at one end to the side wall of the column and at the other end to the end of the bottom crossbeam.

[0005] As an optimization of a liftable and extendable small gantry crane, the sleeve structure includes an outer tube and an inner tube; the inner tube is slidably inserted inside the outer tube, and both the outer tube and the inner tube have square cross-sections.

[0006] As an optimization of a small, liftable, and extendable gantry crane, the locking element is a pin or screw.

[0007] As an optimization of a liftable and extendable small gantry crane, two inclined support rods are provided, and the two inclined support rods are symmetrically arranged on both sides of the column. The two inclined support rods and the bottom crossbeam form a triangular support structure.

[0008] As an optimization of a small, liftable, and extendable gantry crane, the bottom crossbeam is equipped with brake casters.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) Multi-purpose and economical: Through the design of the telescopic main beam and column, one machine can cover a wide range of size requirements, replacing multiple fixed-size gantry cranes, which significantly reduces equipment procurement costs and storage space requirements.

[0010] (2) Flexible adjustment and strong adaptability: The length of the main beam and the height of the column can be adjusted independently and steplessly, which can quickly respond to equipment of different sizes and narrow working spaces, and has extremely strong versatility.

[0011] (3) Stable structure and safe and reliable: The triangular support structure consisting of a bottom crossbeam and symmetrically arranged diagonal support rods provides excellent overall rigidity and anti-overturning stability while ensuring adjustment flexibility.

[0012] (4) Easy to operate, saving time and effort: Size adjustment and lifting point positioning are completed through simple mechanical operations, without the need for special tools or complex skills, which greatly improves equipment preparation and operation efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of a liftable and extendable small gantry crane according to an embodiment of this application.

[0015] In the diagram: 1. Main beam; 11. First beam; 12. Second beam; 2. Column; 21. First main body; 22. Second column; 3. Locking component; 31. Adjustment hole; 4. Sliding block; 41. Locking bolt; 42. Lifting ring; 5. Bottom crossbeam; 6. Diagonal support rod; 7. Brake caster. Detailed Implementation

[0016] To make the technical solution and advantages of this utility model clearer, the present utility model and its beneficial effects will be described in further detail below with reference to specific embodiments and accompanying drawings. However, the embodiments of this utility model are not limited thereto.

[0017] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0019] The following is in conjunction with the appendix Figure 1 This application will be described in further detail below.

[0020] This application provides a liftable and extendable small gantry crane, which adopts the following technical solution: Reference Figure 1 A liftable and extendable miniature gantry crane includes a main beam 1, two columns 2, a locking element 3, at least one slider 4, a bottom crossbeam 5, and diagonal support rods 6. The main beam 1 is the primary load-bearing and span-adjusting component, comprising a first beam body 11 and a second beam body 12, which are slidably connected via a sleeve structure. By applying external force to cause relative sliding between the first beam body 11 and the second beam body 12, the total length of the main beam 1 can be steplessly adjusted within a continuous range, thus flexibly adapting to equipment and working spaces of varying widths.

[0021] Two uprights 2 are vertically fixed at both ends of the main beam 1, forming the supporting legs of the portal frame. Each upright 2 also adopts a sleeve structure with the same principle as the main beam 1, including a first column and a second column 22 that are slidably connected. By adjusting the overlapping part of the two columns, the overall height of the upright 2 can be continuously changed to accommodate equipment of different heights or adapt to limited indoor spaces.

[0022] In a preferred embodiment of this utility model, the sleeve structure includes an outer tube with a square cross-section and an inner tube that slides through it. Compared to a round tube, the square tube has stronger bending and torsional resistance, and can better withstand the bending moment generated during hoisting. As a specific and sufficiently strong preferred solution, a square steel with a cross-section of 100mm×100mm×10mm can be used as the outer tube, and a square steel with a cross-section of 80mm×80mm×10mm can be used as the inner tube.

[0023] To ensure structural rigidity and safety during hoisting operations, locking components 3 are installed on the sleeve structure of the main beam 1 and the column 2. Locking components 3 mechanically lock the telescopic state of the main beam 1 and the column 2 after adjustment to the required length and height, preventing them from retracting under load. In this embodiment, the locking component 3 is preferably a pin or a screw. Correspondingly, multiple sets of adjustment holes 31 are precisely spaced axially on the tube wall of the sleeve structure. When the target size is reached, the operator inserts the pin into the aligned adjustment hole 31 or tightens the screw so that its end presses against the inner tube. Reliable locking is achieved through strong friction and mechanical interlocking. This locking method is simple in structure, low in cost, and has a high locking force, making it very suitable for the application scenarios of this utility model.

[0024] The slider 4 is arranged on the main beam 1 and slides along the axis of the main beam 1, allowing for flexible adjustment of the lifting point position. A lifting ring 42 is welded and fixed to the bottom of the slider 4, providing a standard connection point for lifting equipment such as manual hoists and electric hoists. Locking bolts 41 are inserted through the side wall of the slider 4. By tightening these locking bolts 41, the positive pressure generated by the bolts can firmly press and fix the slider 4 to any position on the main beam 1. Through this structure, the lifting point position can be flexibly adjusted laterally according to changes in the equipment's center of gravity, avoiding the cumbersome process of moving the entire gantry crane due to fixed lifting points.

[0025] The bottom crossbeam 5 is fixedly connected to the bottom of the column 2, with one bottom crossbeam 5 paired with one column 2. The bottom crossbeam 5 serves as the supporting foundation for the column 2, forming an inverted T-shaped structure with the column 2. This effectively increases the support span, significantly reduces the risk of the entire gantry crane overturning due to eccentric loading, and helps to increase the overall stability of the gantry crane.

[0026] Diagonal support rods 6 are arranged on both sides of the column 2. One end of the diagonal support rod 6 is fixedly connected to the side wall of the column 2 with screws, and the other end is fixedly connected to the end of the bottom crossbeam 5 with screws. From a mechanical point of view, the diagonal support rods 6, the column 2, and the bottom crossbeam 5 together form a triangular support structure. The geometric stability of the triangle is translated into excellent resistance to lateral deformation, which can effectively resist the lateral swaying and overturning moment generated during hoisting. Preferably, two diagonal support rods 6 are arranged and symmetrically distributed on both sides of the column 2. The two symmetrical triangular support structures enhance the deformation resistance on both sides of the column 2, which helps to improve the overall rigidity and anti-overturning stability of the gantry crane.

[0027] In another preferred embodiment of this utility model, a brake caster 7 is installed on the bottom crossbeam 5. The brake caster 7 facilitates the overall movement of the gantry crane when in the movable state, and can be locked after being positioned, becoming a braking state, turning the wheel into a fixed fulcrum, and ensuring static stability and safety during the hoisting operation.

[0028] The application process and implementation principle of this application embodiment are as follows: During transfer or storage, the operator loosens all locking parts 3, retracting the main beam 1 and column 2 to their minimum closed state. At this time, the overall size of the gantry crane is at its smallest, facilitating passage through narrow areas and saving storage space. When specific equipment needs to be lifted, it is first moved to the vicinity of the work point. Then, according to the site space and equipment size, the main beam 1 is stretched sequentially to obtain sufficient span width, and the column 2 is stretched to obtain the necessary lifting height. Subsequently, pins or screws are used to firmly lock the telescopic state of all sleeve structures, forming a rigid lifting frame with customized dimensions. Next, the slider 4 on the main beam 1 is slid so that it is directly above the center of gravity of the equipment, and the locking bolt 41 of the slider 4 is tightened to fix the lifting point. Finally, the hoist is attached to the lifting ring 42, and safe and efficient lifting operations can begin. Through the reconfigurable frame composed of the telescopic structure of the main beam 1 and column 2, combined with the rigid locking achieved by the locking parts 3, the fixed-size structure of the traditional gantry crane is transformed into a rigid system with adaptive size adjustment, resolving the contradiction between fixed-size equipment and variable task requirements. It features adaptability to working conditions due to size self-adjustment, excellent stability guaranteed by triangular support and rigid base frame, and ease of operation throughout the adjustment process.

[0029] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A small, liftable, extendable gantry crane, characterized in that, include: The main beam (1) includes a first beam body (11) and a second beam body (12) that are slidably connected by a sleeve structure; Two columns (2) are respectively set at both ends of the main beam (1), and each column (2) includes a first column and a second column (22) that are slidably connected by a sleeve structure; Locking element (3) is provided on the sleeve structure and is used to lock the extension and retraction state of the main beam (1) or the column (2); At least one slider (4) is provided on the main beam (1). A lifting ring (42) is provided at the bottom of the slider (4). A locking bolt (41) is provided on the upper part of the slider (4). The locking bolt (41) is used to press and fix the slider (4) on the main beam (1). The bottom crossbeam (5) is fixedly connected to the bottom of the two columns (2); The inclined support rod (6) is fixedly connected at one end to the side wall of the column (2) and at the other end to the end of the bottom crossbeam (5).

2. The liftable and extendable small gantry crane according to claim 1, characterized in that, The sleeve structure includes an outer tube and an inner tube that slides through the outer tube; the cross-sections of the outer tube and the inner tube are square.

3. The liftable and extendable small gantry crane according to claim 1, characterized in that, The locking element (3) is a pin or a screw.

4. The liftable and extendable small gantry crane according to claim 1, characterized in that, Two inclined support rods (6) are provided, and the two inclined support rods (6) are symmetrically arranged on both sides of the column (2). The two inclined support rods (6) and the bottom crossbeam (5) form a triangular support structure.

5. A liftable and extendable small gantry crane according to claim 1, characterized in that, Braking casters (7) are provided on the bottom crossbeam (5).

Images