A main girder structure of a height-limited workshop crane

Abstract

This utility model discloses a main beam structure for a crane used in height-restricted workshops, relating to the field of crane main beams. It includes a main beam body composed of a web, an upper flange plate at the top of the web, and a lower flange plate at the bottom of the web. A slide rail is provided at the bottom of the lower flange plate. An end beam connecting plate is provided at the end of the web. A reinforcing assembly is provided inside the main beam body. The reinforcing assembly includes parallel webs, with a partition between the two sets of webs. Weight-reducing holes are provided in the partition and the outer wall of the web. A reinforcing plate is provided on the inner wall of the lower flange plate. This main beam structure for a crane used in height-restricted workshops, through optimized main beam structure and reasonable configuration of reinforcing components, constructs a multi-dimensional load-bearing support system. This effectively distributes the load during lifting operations, preventing bending and deformation of the main beam. While effectively reducing the overall height of the main beam to adapt to the height-restricted workshop environment, it also ensures the load-bearing strength and rigidity of the main beam.

Description

Technical Field

[0001] This utility model relates to the field of crane main beam technology, specifically a main beam structure for a crane used in height-restricted workshops. Background Technology

[0002] In industrial production, cranes are widely used in various workshops as important material handling equipment. However, some old workshops or special-purpose workshops have height restrictions, and the main beam structure of existing cranes is often difficult to adapt to such height-restricted environments.

[0003] In the prior art, Chinese Patent No. CN210236882U discloses a crane main beam structure, including a main beam and C-shaped rail pins. The top end face of the main beam has C-shaped rail pins at its front and rear edges, which are evenly arranged laterally on the top end face of the main beam by welding. The bottom end face of the main beam has rails at its front and rear edges, which are laterally fixed to the front and rear edges of the main beam by welding. The top end face of the rails has lubrication devices evenly arranged laterally, which are vertically connected to the interior of the rails through interlocking threads. U-shaped fasteners are welded to the left and right ends of the main beam for thorough lubrication. After lubrication, oil is replenished through an oil core for repeated self-lubrication, which is convenient, quick, and requires no manual application of lubricant. It is simple to operate and highly practical.

[0004] Based on the above information, existing crane main beams mostly adopt box-type structures. To ensure load-bearing capacity, the height of the box-type structure is usually large, resulting in an overall crane height that cannot be installed and used in height-restricted workshops. If the height of the box-type main beam is forcibly reduced, its load-bearing strength and rigidity will be significantly reduced, and problems such as bending and deformation of the main beam are likely to occur during lifting operations, which seriously affect the service life and operational safety of the crane. Therefore, we propose a main beam structure for cranes used in height-restricted workshops. Utility Model Content

[0005] The purpose of this utility model is to provide a main beam structure for a crane used in height-restricted workshops, in order to solve the problem mentioned in the background art that the main beams of existing cranes mostly adopt box-type structures. In order to ensure load-bearing capacity, the height of the box-type structure is usually large, resulting in the overall height of the crane being too high, making it impossible to install and use in height-restricted workshops. If the height of the box-type main beam is forcibly reduced, its load-bearing strength and rigidity will be greatly reduced, and problems such as bending and deformation of the main beam are likely to occur during lifting operations, which seriously affect the service life and operational safety of the crane.

[0006] To achieve the above objective, the present utility model provides the following technical solution: a main beam structure of a crane for a height-limited workshop, comprising a main beam body consisting of a web, an upper flange plate at the top of the web and a lower flange plate at the bottom of the web, a sliding rail is arranged at the bottom of the lower flange plate, an end beam connecting plate is arranged at the end of the web, a reinforcing assembly is arranged inside the main beam body, the reinforcing assembly comprises webs arranged in parallel, a partition plate is arranged between the two sets of webs, a lightening hole is opened on the partition plate and the outer wall of the web, and a reinforcing plate is arranged on the inner wall of the lower flange plate.

[0007] Further, the upper flange plate and the lower flange plate are arranged symmetrically, the width of the upper flange plate and the lower flange plate is greater than the distance between the two sets of webs, a closed space is formed between the two sets of webs, and the sliding rail is located at the middle position of the bottom of the lower flange plate.

[0008] Further, the cross-section of the end beam connecting plate is designed in a [ shape, the end beam connecting plates are symmetrically arranged at both ends of the web, and bolt holes distributed in an array are opened on the outer wall of the end beam connecting plate.

[0009] Further, the partition plate is a rectangular steel plate, the partition plate is perpendicular to the webs, and the partition plates are distributed at equal intervals between the two sets of webs.

[0010] Further, the cross-section of the reinforcing plate is designed in a T shape, the top end of the reinforcing plate is designed in an arc shape, the length of the reinforcing plate is the same as that of the lower flange plate, and both sides of the reinforcing plate are connected with the webs.

[0011] Further, reinforcing ribs are arranged on the inner wall of the webs, the cross-section of the reinforcing ribs is designed in an X shape, both ends of the reinforcing ribs are connected with adjacent partition plates, the reinforcing ribs are distributed at equal intervals, and the bottom of the reinforcing ribs is connected with the top of the reinforcing plate.

[0012] Further, reinforcing blocks symmetrically distributed are arranged on the outer wall of the webs, the cross-section of the reinforcing blocks is designed in a triangular shape, the reinforcing blocks are arranged at equal intervals along the length direction of the webs, the cross-section of the lightening holes is designed in a circular shape, and the lightening holes are distributed in an array.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. The main beam structure of the crane used in the height-restricted workshop, through optimized cross-sectional design and reasonable configuration of reinforcing components, effectively reduces the overall height of the main beam to adapt to the environment of the height-restricted workshop while ensuring the load-bearing strength and rigidity of the main beam. The upper and lower flange plates are symmetrically arranged, and their width is greater than the distance between the two sets of web plates to form a closed space. With the reinforcement plates on the inner wall of the lower flange plate, the reinforcement ribs on the inner wall of the web plate, and the partitions distributed at equal intervals, a multi-dimensional stress support system is constructed. This system can effectively distribute the load during lifting operations and prevent the main beam from bending or deforming. It not only meets the installation and use requirements of the height-restricted workshop but also ensures the operational safety and service life of the crane.

[0015] 2. It features a lightweight design and is easy to assemble, which helps to improve the economy of use and the convenience of operation. The array of circular weight-reducing holes on the outer wall of the partition and web plate significantly reduces the overall weight of the main beam without affecting the structural strength, reducing material consumption, manufacturing costs, and energy consumption during crane operation. On the other hand, the bolt holes distributed in an array on the outer wall of the end beam connecting plate at the end of the web plate facilitate precise and stable connection with the end beam, simplifying the assembly process, shortening the installation period, reducing the difficulty of on-site installation, and providing convenience for subsequent maintenance and disassembly.

[0016] 3. The symmetrically distributed triangular reinforcing blocks on the outer wall of the web, evenly spaced along the length of the web, effectively enhance the structural strength of the connection between the web and the flange, preventing cracking in this stress concentration area. Meanwhile, the slide rail located at the middle of the bottom of the lower flange provides stable guidance for the crane's moving parts. Combined with the high stability of the overall structure, this ensures smooth movement of the moving parts during lifting operations, reduces the impact of swaying on operational accuracy, and further guarantees the long-term, stable operation of the crane in height-restricted workshops. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the web of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the web of this utility model;

[0020] Figure 4 This is a schematic diagram of the reinforcing plate and reinforcing rib structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the partition and reinforcing plate structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the web, partition, and reinforcing ribs of this utility model.

[0023] In the figure: 1. Main beam body; 2. Web plate; 3. Upper flange plate; 4. Lower flange plate; 5. End beam connecting plate; 501. Bolt hole; 6. Slide rail; 7. Partition plate; 8. Reinforcing plate; 9. Reinforcing rib; 11. Reinforcing block; 12. Lightening hole. Detailed Description of Embodiments

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative work shall fall within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figures 1-6 , the present utility model provides the following technical solution: a main beam structure of a crane for a height-limited workshop, comprising a main beam body 1 consisting of a web plate 2, an upper flange plate 3 at the top of the web plate 2 and a lower flange plate 4 at the bottom of the web plate 2, a slide rail 6 is arranged at the bottom of the lower flange plate 4, and an end beam connecting plate 5 is arranged at the end of the web plate 2.

[0026] As shown in Figures 1-4 , the upper flange plate 3 and the lower flange plate 4 are symmetrically arranged, the width of the upper flange plate 3 and the lower flange plate 4 is greater than the distance between the two sets of web plates 2, a closed space is formed between the two sets of web plates 2, and the slide rail 6 is located at the middle position of the bottom of the lower flange plate 4.

[0027] As shown in Figures 1-4 , the cross-section of the end beam connecting plate 5 is designed in a "匚" shape, the end beam connecting plates 5 are symmetrically arranged at both ends of the web plate 2, and bolt holes 501 distributed in an array are opened on the outer wall of the end beam connecting plate 5.

[0028] The main beam 1, with web 2, upper flange 3, and lower flange 4 as its core, forms a closed load-bearing structure. Its design fundamentally resolves the conflict between height restrictions and load-bearing capacity. The upper flange 3 and lower flange 4 are symmetrically distributed, and their width is greater than the distance between the two sets of web 2. This wide flange and narrow web 2 cross-section design, without increasing the overall height of the main beam, increases the moment of inertia of the cross-section by expanding the load-bearing area of ​​the flanges, providing fundamental support for load-bearing capacity and adapting to the low-ceilinged installation requirements of height-restricted workshops. Simultaneously, the slide rail 6 at the bottom center of the lower flange 4 works in conjunction with the overall stability of the main beam structure, serving as the running section. The centrally positioned movement path of the component ensures balanced force distribution during operation, preventing localized stress concentration caused by track deviation. The rigidity of the main beam's enclosed structure provides stable support for the slide rail 6, preventing deformation during operation and ensuring precise and smooth lifting operations along the preset trajectory. Furthermore, the end beam connecting plate 5 at the end of the web plate 2 is connected to the end beam via arrayed bolt holes 501. This bolt connection not only simplifies the assembly process but also distributes the load transmitted by the end beam evenly to the main beam body 1 through the rigid connection between the connecting plate and the web plate 2, preventing stress concentration at the end and further enhancing the overall structural stability.

[0029] Example 2: Please refer to Figures 1-6 Based on Embodiment 1, a reinforcing component is also disclosed, the specific structure of which is as follows: The main beam body 1 is provided with a reinforcing component, which includes web plates 2 arranged in parallel, and a partition plate 7 is provided between the two sets of web plates 2. The partition plate 7 and the outer wall of the web plate 2 are provided with weight reduction holes 12. The inner wall of the lower flange plate 4 is provided with a reinforcing plate 8. The partition plate 7 is a rectangular steel plate, and the partition plate 7 is arranged perpendicular to the web plate 2. The partition plate 7 is distributed at equal intervals between the two sets of web plates 2. The cross section of the reinforcing plate 8 is T-shaped, and the top of the reinforcing plate 8 is arc-shaped. The length of the reinforcing plate 8 is the same as the length of the lower flange plate 4. Both sides of the reinforcing plate 8 are connected to the web plate 2. The inner wall of the web plate 2 is provided with reinforcing ribs 9, and the cross section of the reinforcing ribs 9 is X-shaped. The two ends of the reinforcing ribs 9 are connected to the adjacent partition plate 7. The reinforcing ribs 9 are distributed at equal intervals, and the bottom of the reinforcing ribs 9 is connected to the top of the reinforcing plate 8.

[0030] Rectangular partitions 7, vertically arranged between two sets of parallel webs 2, are evenly spaced, dividing the enclosed space inside the main beam into multiple independent load-bearing units. When vertical loads are generated during lifting operations, the partitions 7 can quickly transfer the load to the webs 2 and the upper and lower flanges 4, preventing local overload. The reinforcing plates 8 on the inner wall of the lower flange 4 are rigidly connected to the webs 2 on both sides, which can specifically enhance the bending resistance of the lower flange 4. During lifting, the main load borne by the lower part is transferred to the webs 2 through the reinforcing plates 8, effectively dispersing the force on the lower flange 4 and preventing its deformation. The X-shaped reinforcing ribs 9 are connected to the partition plates 7 at both ends and the reinforcing plate 8 at the bottom. The X-shaped structure, which is evenly distributed, can cope with multi-directional loads. The vertical load is transferred to the partition plates 7 and the reinforcing plate 8 through the reinforcing ribs 9, while the lateral load generated by horizontal swaying is converted into tensile and compressive forces by the X-shaped structure, forming multi-dimensional stress support. At the same time, the triangular reinforcing blocks 11 symmetrically distributed on the outer wall of the web plate 2 are evenly spaced along the length direction, which can strengthen the connection node between the web plate 2 and the flange plate, prevent the stress concentration area from cracking during long-term operation, and achieve a balance between low height structure and high load-bearing capacity.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A main girder structure of a height-limited workshop crane, comprising a main girder body (1), characterized in that: The main girder body (1) is composed of a web plate (2), an upper flange plate (3) at the top of the web plate (2) and a lower flange plate (4) at the bottom of the web plate (2), a slide rail (6) is arranged at the bottom of the lower flange plate (4), an end girder connecting plate (5) is arranged at an end of the web plate (2), a reinforcing assembly is arranged inside the main girder body (1), the reinforcing assembly comprises two web plates (2) arranged in parallel, a partition plate (7) is arranged between the two groups of web plates (2), lightening holes (12) are arranged on the partition plate (7) and an outer wall of the web plate (2), and a reinforcing plate (8) is arranged on an inner wall of the lower flange plate (4).

2. A main girder structure of a height-limited shop crane according to claim 1, characterized in that: The upper flange plate (3) and the lower flange plate (4) are arranged symmetrically, the width of the upper flange plate (3) and the lower flange plate (4) is greater than the distance between the two groups of web plates (2), a closed space is formed between the two groups of web plates (2), and the slide rail (6) is located at a middle position of the bottom of the lower flange plate (4).

3. A main girder structure of a shop crane with height limitation according to claim 1, characterized in that: A cross section of the end girder connecting plate (5) is in a "匚"-shaped design, the end girder connecting plates (5) are arranged symmetrically at two ends of the web plate (2), and bolt holes (501) distributed in an array are formed on an outer wall of the end girder connecting plate (5).

4. The girder structure of a portal crane for a vehicle height- limited plant according to claim 1, characterized in that: The partition plate (7) is a rectangular steel plate, the partition plate (7) and the web plate (2) are arranged perpendicularly, and the partition plates (7) are distributed at equal intervals between the two groups of web plates (2).

5. A main girder structure of a shop-type overhead traveling crane according to claim 1, characterized in that: A cross section of the reinforcing plate (8) is in a T-shaped design, a top end of the reinforcing plate (8) is in an arc-shaped design, the length of the reinforcing plate (8) is the same as that of the lower flange plate (4), and both sides of the reinforcing plate (8) are connected with the web plate (2).

6. A main girder structure of a shop-type overhead traveling crane according to claim 1, characterized in that: Reinforcing ribs (9) are arranged on the inner wall of the web plate (2), a cross section of the reinforcing rib (9) is in an X-shaped design, two ends of the reinforcing rib (9) are connected with adjacent partition plates (7), the reinforcing ribs (9) are distributed at equal intervals, and a bottom of the reinforcing rib (9) is connected with a top of the reinforcing plate (8).

7. A main girder structure of a shop-type overhead traveling crane according to claim 1, characterized in that: Symmetrically distributed reinforcing blocks (11) are arranged on an outer wall of the web plate (2), a cross section of the reinforcing block (11) is in a triangular design, the reinforcing blocks (11) are arranged at equal intervals along a length direction of the web plate (2), a cross section of the lightening hole (12) is in a circular design, and the lightening holes (12) are distributed in an array.

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