A crane beam structure

Abstract

This utility model relates to the field of crane equipment technology and discloses a crane beam structure, including a beam body, which is a hollow rectangular steel structure. This crane beam structure achieves a balance between strength and precise weight reduction through the design of I-shaped reinforcing ribs and weight-reducing holes. The I-shaped reinforcing ribs are made of high-strength alloy steel, and their horizontal flanges can efficiently bear the vertical load during lifting operations and evenly distribute the stress to the inner wall of the beam body. The vertical webs can resist lateral shear forces, strengthening the beam rigidity from the core load-bearing layer. The weight-reducing holes are only opened in the "non-reinforcing rib projection area" on the upper and lower surfaces of the beam, avoiding the load-bearing area of ​​the reinforcing ribs and reducing redundant material through precise hole opening. With the synergy of these two aspects, the beam will not suffer from insufficient local strength due to weight reduction, nor will it cause weight redundancy due to excessive reinforcement, perfectly meeting the dual requirements of high-strength load-bearing and low-energy-consumption operation of cranes.

Description

Technical Field

[0001] This utility model relates to the field of crane equipment technology, specifically to a crane beam structure. Background Technology

[0002] As a core load-bearing component, the crane beam must not only stably bear various loads during lifting operations (including the weight of the load and the impact of the trolley movement), but also provide a reliable support track for the lateral movement of the load. It is a key structure to ensure that the crane can accurately move the load.

[0003] The existing patent document CN211644358U provides a crossbeam structure for a multi-point suspended crane. This utility model sets the main beam in a segmented structure, with the main beam being composed of several beams connected together. Each beam is integrally formed by a support part, a connecting part, and a fixing part. During assembly, each beam is directly connected and fixed. Compared with existing crossbeams, this design has the advantages of better production quality and higher assembly efficiency.

[0004] However, the existing crane beam structure struggles to achieve an efficient balance between lightweighting and structural strength. Specifically, while some existing beams attempt to reduce their weight by creating openings, they generally lack a precise design logic that avoids the core load-bearing area of ​​the reinforcing ribs from the weight-reducing openings. Either in pursuit of weight reduction, the opening range is expanded to the projection area of ​​the reinforcing ribs, directly weakening the connection strength between the reinforcing ribs and the main beam, leading to a decrease in the local load-bearing capacity of the beam. This can easily cause bending, deformation, or even safety hazards during heavy-duty lifting operations. Alternatively, to avoid strength loss, the number of weight-reducing openings is significantly reduced or the opening size is reduced, resulting in a significant reduction in the lightweighting effect and a persistently high overall weight of the beam. Excessive beam weight directly leads to a higher load on the crane drive system, which not only increases energy consumption during operation (significantly increasing electricity costs over long-term use), but also accelerates the wear of drive components (such as motors and gears), shortening the overall service life of the equipment. Ultimately, it falls into a dilemma where insufficient lightweighting results in high energy consumption, while excessive lightweighting results in poor strength. It is difficult to achieve a two-way match between high strength load-bearing capacity and low energy consumption operation, and cannot meet the comprehensive requirements of modern cranes for high efficiency, energy saving, and durability. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a crane beam structure to solve the problem mentioned in the background art that the existing crane beam structures are difficult to achieve an efficient balance between lightweighting and structural strength.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a crossbeam structure for a crane, comprising a crossbeam body, wherein the crossbeam body is a hollow rectangular steel structure, and two sets of reinforcing ribs are symmetrically arranged on the upper and lower sides inside the crossbeam body. The reinforcing ribs are made of high-strength alloy steel and have an I-shaped cross section. Weight-reducing holes are evenly distributed along the length direction on the upper and lower surfaces of the crossbeam body.

[0009] As a further improvement to the above solution, the inner wall of the main body of the crossbeam is coated with an epoxy resin anti-rust coating, which is made of epoxy resin.

[0010] As a further improvement to the above scheme, in each group of reinforcing ribs, adjacent reinforcing ribs are fixedly connected by a support block. The support block is made of stainless steel and has an isosceles triangle structure, with its base welded and fixed to the inner wall of the main body of the beam.

[0011] As a further improvement to the above solution, both ends of the crossbeam body are equipped with adjustment sections. One end of the adjustment section can be inserted into the internal cavity of the crossbeam body and slide in cooperation with the inner wall of the cavity.

[0012] As a further improvement to the above scheme, two sets of guide sliders are symmetrically arranged on the outer wall of the adjustment section, and a guide groove adapted to the guide slider is opened on the inner wall of the main body of the crossbeam.

[0013] As a further improvement to the above solution, the outer wall of one side of the adjustment section is provided with evenly distributed connection holes along the length direction, and the outer walls of both sides of the end of the crossbeam are provided with positioning holes corresponding to the connection holes. The connection holes and the positioning holes are connected by locking bolts.

[0014] As a further improvement to the above solution, the upper surface of the main body of the crossbeam is fixed with an anti-slip strip by fasteners. The anti-slip strip is made of rubber and has an anti-slip protrusion integrally formed on its upper surface.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The crossbeam structure of this crane achieves a balance between strength and precise weight reduction through the design of I-shaped reinforcing ribs and weight-reducing holes. The I-shaped reinforcing ribs are made of high-strength alloy steel, and their horizontal flanges can efficiently bear the vertical load during lifting operations and evenly distribute the stress to the inner wall of the crossbeam body. The vertical web can resist the lateral shear force, thus strengthening the rigidity of the crossbeam from the core load-bearing layer. The weight-reducing holes are only opened in the "non-reinforcing rib projection area" on the upper and lower surfaces of the crossbeam, which avoids the load-bearing area of ​​the reinforcing ribs and reduces redundant material through precise hole opening. With the cooperation of the two, the crossbeam will not suffer from insufficient local strength due to weight reduction, nor will it cause weight redundancy due to excessive reinforcement. It perfectly meets the dual requirements of high strength load-bearing and low energy consumption operation of the crane.

[0017] 2. The crossbeam structure of this crane achieves the dual goals of smooth adjustment and firm fixation through the design of guide sliders, guide grooves, connecting holes, and positioning holes. The sliding cooperation between the guide sliders and guide grooves provides precise lateral limit for the adjustment section, preventing offset or jamming when the adjustment section is inserted or slid, and ensuring that the length adjustment process is stable and controllable. When the adjustment section moves to the target position, the alignment design of the connecting holes and positioning holes can form a rigid fixation by locking bolts. Moreover, the holes are evenly distributed along the length direction, which can adapt to the installation requirements of different end beam spacings. This combination design not only solves the problems of fixed crossbeam length and poor adaptability in traditional crossbeams, but also avoids structural shaking caused by unstable fixation after adjustment, ensuring the overall stability during lifting operations.

[0018] 3. The crane's crossbeam structure, through the design of anti-rust coating and anti-slip strips, provides dual protection for long-term durability and operational safety. The epoxy resin anti-rust coating applied to the inner wall of the crossbeam body forms a dense protective film on the metal surface, isolating the inner wall from the erosion of humid air, dust, and oil, effectively slowing down the rust rate and reducing the strength loss caused by rust. The rubber anti-slip strips and one-piece molded anti-slip protrusions on the upper surface of the crossbeam increase the surface friction coefficient of the crossbeam, providing sufficient anti-slip support for maintenance personnel even in rainy weather or daily oil accumulation, avoiding the risk of slipping when working at height. Both of these measures address the needs of the crossbeam throughout its entire life cycle, focusing on structural durability and personnel safety respectively. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the main beam of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the adjusting section of this utility model;

[0022] Figure 4 This is an enlarged structural diagram showing a partial detail of the support block of this utility model.

[0023] In the diagram: 1. Main body of the crossbeam; 2. Reinforcing rib; 3. Weight reduction hole; 4. Anti-rust coating; 5. Support block; 6. Adjustment section; 7. Guide slider; 8. Guide groove; 9. Connection hole; 10. Positioning hole; 11. Anti-slip strip. Detailed Implementation

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

[0025] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a crossbeam structure for a crane, including a crossbeam body 1, the crossbeam body 1 being a hollow rectangular steel structure, two sets of reinforcing ribs 2 symmetrically arranged on the upper and lower sides inside the crossbeam body 1, the reinforcing ribs 2 being made of high-strength alloy steel with an I-shaped cross section, and weight-reducing holes 3 evenly distributed along the length direction on the upper and lower surfaces of the crossbeam body 1.

[0026] During lifting operations, the vertical load (including the weight of the load itself and the impact load during operation) transmitted by the trolley first acts on the upper surface of the main beam 1. At this time, the I-shaped reinforcing ribs 2 inside the main beam 1 bear the core load-bearing function. The horizontal flanges of the reinforcing ribs 2 evenly distribute the vertical load to the inner wall of the main beam 1, avoiding localized stress concentration. At the same time, the vertical web of the reinforcing ribs 2 resists the transverse shear force generated during load transmission, preventing lateral torsional deformation of the beam. The weight-reducing holes 3 on the upper and lower surfaces of the main beam 1 are only opened in the "non-reinforcing rib 2 projection area". Without affecting the strength of the core load-bearing area, redundant materials are reduced, and the weight of the beam itself is reduced. This reduces the load on the crane drive system and avoids additional deformation caused by excessive weight, balancing load-bearing performance and operating energy consumption.

[0027] The inner wall of the main body 1 of the crossbeam is coated with an epoxy resin anti-rust coating 4. The anti-rust coating 4 is made of epoxy resin. In each set of reinforcing ribs 2, two adjacent reinforcing ribs 2 are fixedly connected by a support block 5. The support block 5 is made of stainless steel and has an isosceles triangle structure. Its base is welded and fixed to the inner wall of the main body 1 of the crossbeam. Both ends of the main body 1 of the crossbeam are equipped with adjustment sections 6. One end of the adjustment section 6 can be inserted into the internal cavity of the main body 1 of the crossbeam and slides against the inner wall of the cavity. Two sets of guide sliders 7 are symmetrically arranged on the outer wall of the adjustment section 6. The inner wall of the main body 1 of the crossbeam is provided with guide grooves 8 that are adapted to the guide sliders 7. The outer wall of one side of the adjustment section 6 is provided with evenly distributed connection holes 9 along the length direction. The outer walls of both sides of the end of the main body 1 of the crossbeam are provided with positioning holes 10 corresponding to the connection holes 9. The connection holes 9 and the positioning holes 10 are connected by locking bolts. The upper surface of the main body 1 of the crossbeam is fixed with anti-slip strips 11 by fasteners. The anti-slip strips 11 are made of rubber and have anti-slip protrusions integrally formed on the upper surface.

[0028] The isosceles triangular support blocks 5 between each set of reinforcing ribs 2 are welded to the inner wall of the crossbeam by their base and fixed to the webs of the adjacent reinforcing ribs 2 by their two sides, forming a transverse tie frame. This further restricts the offset of a single reinforcing rib 2, ensuring that the entire reinforcing rib 2 system is stressed synchronously. Combined with the hollow rectangular steel structure of the crossbeam body 1, this achieves "load transfer layer by layer and stress dispersion throughout the entire area," preventing the crossbeam from bending or breaking due to heavy loads. When it is necessary to adjust the total length of the crossbeam according to the distance between the crane end beams, the adjusting section 6 can be pushed to slide along the internal cavity of the crossbeam body 1. The guide slider 7 on the outer wall of the adjusting section 6 and the guide groove 8 on the inner wall of the crossbeam body 1 form a sliding fit, providing precise transverse limit for the adjusting section 6, preventing offset or jamming during sliding, and ensuring the stability of the length adjustment direction. When the adjusting section 6 extends to the target length (making the total length of the crossbeam match the distance between the end beams), the connecting hole 9 on the outer wall of the adjusting section 6 is aligned with the positioning hole 10 at the end of the crossbeam body 1. At this time, the locking bolt is inserted. Two sets of holes are provided and tightened. The axial pressure of the bolts fixes the relative position of the adjustment section 6 and the main body 1 of the crossbeam, preventing the adjustment section 6 from shifting due to vibration during lifting operations. This achieves stable locking of the crossbeam length and meets the installation requirements of different factory buildings and different end beam spacings. During long-term use of the crossbeam, the epoxy resin anti-rust coating 4 coated on the inner wall of the main body 1 of the crossbeam forms a dense protective film, isolating moisture, dust, and oil stains that may be generated during lifting operations from contacting the metal inner wall, preventing the inner wall from rusting, avoiding structural strength reduction due to rust, and extending the service life of the crossbeam. When maintenance personnel need to perform maintenance work on the upper surface of the main body 1 of the crossbeam (such as checking the weld of the reinforcing rib 2 and adjusting the locking bolts), the anti-slip protrusions integrally formed on the upper surface of the anti-slip strip 11 greatly increase the friction coefficient of the contact surface. Even if the surface is covered with oil stains or rainwater, it can prevent personnel from slipping when stepping on it. Combined with the firm fixation of the fasteners, it provides safe support for high-altitude maintenance operations and reduces operational risks.

[0029] Working Principle: During lifting operations, the vertical load (including the weight of the load itself and the impact load during operation) transmitted by the lifting trolley first acts on the upper surface of the main beam 1. At this time, the I-shaped reinforcing ribs 2 inside the main beam 1 bear the core load. The horizontal flanges of the reinforcing ribs 2 evenly distribute the vertical load to the inner wall of the main beam 1, avoiding localized stress concentration. At the same time, the vertical webs of the reinforcing ribs 2 resist the lateral shear force generated during load transmission, preventing lateral torsional deformation of the beam. In addition, the isosceles triangular support blocks 5 between each group of reinforcing ribs 2 are welded to the inner wall of the beam by their base and fixed to the webs of adjacent reinforcing ribs 2 by their two sides, forming a lateral tie frame to further restrict the load. The offset of a single reinforcing rib 2 ensures that the entire reinforcing rib 2 system is subjected to synchronous force. Combined with the hollow rectangular steel structure of the main beam 1, this achieves "load transfer layer by layer and stress dispersion throughout the entire area," preventing the beam from bending or breaking under heavy loads. The weight-reducing holes 3 on the upper and lower surfaces of the main beam 1 are only located in the "non-reinforcing rib 2 projection area," reducing redundant material and lowering the beam's weight without affecting the strength of the core load-bearing area. This reduces the load on the crane drive system and avoids additional deformation due to excessive weight, balancing load-bearing performance and operating energy consumption. When it is necessary to adjust the total length of the beam according to the crane end beam spacing, the adjusting section 6 can be pushed to slide along the internal cavity of the main beam 1. The guide slider 7 on the outer wall and the guide groove 8 on the inner wall of the crossbeam body 1 form a sliding fit, providing precise lateral limit for the adjustment section 6, preventing offset and jamming during sliding, and ensuring stability in the length adjustment direction. When the adjustment section 6 extends to the target length (making the total length of the crossbeam match the end beam spacing), the connecting hole 9 on the outer wall of the adjustment section 6 aligns with the positioning hole 10 at the end of the crossbeam body 1. At this time, the locking bolt is passed through the two sets of holes and tightened. The axial pressure of the bolt fixes the relative position of the adjustment section 6 and the crossbeam body 1, preventing the adjustment section 6 from shifting due to vibration during lifting operations, achieving stable locking of the crossbeam length, and meeting the installation requirements of different factory buildings and different end beam spacings. During long-term use, the epoxy resin anti-rust coating 4 applied to the inner wall of the main beam 1 forms a dense protective film, isolating moisture, dust, and oil stains that may be generated during lifting operations from contacting the metal inner wall, preventing rust, avoiding structural strength reduction due to rust, and extending the service life of the beam. When maintenance personnel need to perform maintenance work on the upper surface of the main beam 1 (such as checking the weld of the reinforcing rib 2 and adjusting the locking bolts), the anti-slip protrusions integrally formed on the upper surface of the anti-slip strip 11 greatly increase the friction coefficient of the contact surface. Even if the surface is covered with oil or rainwater, it can prevent personnel from slipping when stepping on it. Combined with the firm fixation of the fasteners, it provides safe support for high-altitude maintenance operations and reduces operational risks.

[0030] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A crossbeam structure for a crane, comprising a crossbeam body (1), characterized in that: The main body of the crossbeam (1) is a hollow rectangular steel structure. Two sets of reinforcing ribs (2) are symmetrically arranged on the upper and lower sides inside the main body of the crossbeam (1). The reinforcing ribs (2) are made of high-strength alloy steel and have an I-shaped cross section. Weight-reducing holes (3) are evenly distributed along the length direction on the upper and lower surfaces of the main body of the crossbeam (1).

2. The crossbeam structure of a crane according to claim 1, characterized in that: The inner wall of the main body of the crossbeam (1) is coated with an epoxy resin anti-rust coating (4), and the anti-rust coating (4) is made of epoxy resin.

3. The crossbeam structure of a crane according to claim 2, characterized in that: In each group of reinforcing ribs (2), adjacent reinforcing ribs (2) are fixedly connected by a support block (5). The support block (5) is made of stainless steel and has an isosceles triangle structure. Its base is welded and fixed to the inner wall of the main body of the beam (1).

4. The crossbeam structure of a crane according to claim 1, characterized in that: Both ends of the main body of the crossbeam (1) are equipped with adjustment sections (6). One end of the adjustment section (6) can be inserted into the internal cavity of the main body of the crossbeam (1) and slides with the inner wall of the cavity.

5. The crossbeam structure of a crane according to claim 4, characterized in that: The outer wall of the adjustment section (6) is symmetrically provided with two sets of guide sliders (7), and the inner wall of the crossbeam body (1) is provided with guide grooves (8) that are adapted to the guide sliders (7).

6. The crossbeam structure of a crane according to claim 5, characterized in that: The outer wall of one side of the adjustment section (6) is provided with evenly distributed connection holes (9) along the length direction. The outer walls of both sides of the end of the crossbeam body (1) are provided with positioning holes (10) corresponding to the connection holes (9). The connection holes (9) and the positioning holes (10) are connected by locking bolts.

7. The crossbeam structure of a crane according to claim 1, characterized in that: The upper surface of the main body of the crossbeam (1) is fixed with an anti-slip strip (11) by fasteners. The anti-slip strip (11) is made of rubber and has an anti-slip protrusion integrally formed on its upper surface.

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