Multi-bin type cross beam

Abstract

The utility model provides a multi-bin type cross beam which is used for assembling a commodity shelf or a goods shelf and comprises a cross beam body, the cross beam body forms a cavity structure in the length direction, and a bearing area is formed on the cavity structure. The cavity structure at least comprises two bin bodies which are connected through a common edge, a height difference and / or a volume difference are / is formed between the two bin bodies, and the inertia moment of the cross section in the bearing area is increased through the height difference and / or the volume difference; the common edges in the vertical direction and / or the horizontal direction form a supporting point and supporting force of the cavity structure in the supporting direction, and / or form a supporting point and pulling force of the cavity structure in the horizontal direction. According to the utility model, a multi-bin structure is formed by a plurality of bin bodies, and meanwhile, the strength of the whole cross beam is improved in cooperation with bending supporting force and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the crossbeam structure technical field of goods shelf or goods shelf assembly, especially to multi-bin type crossbeam. BACKGROUND

[0002] Traditional goods shelf / crossbeam adopts single-bin design, and its cross section structure is simple, and all loads are borne by single-layer vertical surface. This design exposes obvious defects in use, especially in high-load application scenarios such as industry and storage, and the specific defects are as follows:

[0003] 1) insufficient bearing capacity, the inertia moment of single-bin design cross section is low, which leads to obvious plastic deformation of the crossbeam under high load. The single-layer structure cannot uniformly disperse force flow, and the ultimate bearing capacity is generally only in the range of 50-400kg (different plate thickness and length bearing are different), which is difficult to meet the high strength demand.

[0004] 2) poor bending stiffness and shear performance, under bending load, the single-bin crossbeam shows significant bending deformation due to single cross section design and small inertia moment.

[0005] Under shear load conditions, the shear path of the single-layer structure is short, and the local shear stress is concentrated, increasing the risk of shear failure.

[0006] 3) short fatigue life, the force flow path is concentrated in a single path, leading to serious local stress concentration, and fatigue cracks are easily generated under long-term cyclic load, reducing the reliability and service life of the crossbeam.

[0007] 4) poor dynamic load adaptability, the traditional single-bin crossbeam shows large lateral deformation or instability risk under multi-point or dynamic load, and has low safety.

[0008] 5) single-bin design limits the improvement of structural performance, the single-bin crossbeam cannot fully utilize the performance of the material, and the bending stiffness and shear strength of the cross section are low, limiting the use range in high-load scenarios.

[0009] 6) single force flow distribution, local stress concentration is serious, especially at the support points and connection parts, and the force flow concentration leads to local plastic deformation or fatigue cracks of the material.

[0010] 7) poor structural stability, under high load and dynamic scenarios, the lateral stiffness of the single-bin crossbeam is insufficient, and warping and instability phenomena are easily generated.

[0011] 8) single welding process, transition design lacks optimization: the single-bin structure mostly adopts simple right-angle or non-optimized welding process connection mode, and stress is concentrated at the welding point, increasing the risk of structural failure. INVENTION CONTENTS

[0012] The utility model discloses a multi-compartment beam, which is designed with multiple compartments and bending, thereby improving the overall strength.

[0013] To achieve the above object, the utility model discloses the following technical scheme.

[0014] Multi-compartment beam, for the assembly of a storage rack or a goods shelf, comprising,

[0015] Beam body, the beam body forms a cavity structure along the length direction, and a bearing area is formed on the cavity structure;

[0016] The cavity structure comprises at least two compartment bodies connected by a common edge, and a height difference and / or a volume difference are formed between the two compartment bodies, and the height difference and / or the volume difference increase the moment of inertia at the cross section in the bearing area;

[0017] The common edge in the vertical direction and / or the horizontal direction forms a support point and a support force of the cavity structure in the support direction, and / or forms a support point and a pulling force of the cavity structure in the horizontal direction.

[0018] Further, the common edge is a partition plate, and at least one end of the partition plate is bent to form a drainage path under stress.

[0019] Further, the two compartment bodies are formed by bending a plate material, and the end of the plate material is bent to form the common edge or the side edge of the compartment body, so as to form a drainage path under stress.

[0020] Further, the two compartment bodies form a first compartment body and a second compartment body with a volume difference, and the second compartment body is stacked on the first compartment body or is arranged on the horizontal direction side of the first compartment body, so as to form the height difference.

[0021] Further, the side edge of one side of the first compartment body is extended to form the side edge of the second compartment body, so that the local part of the first compartment body is in the same height as the second compartment body.

[0022] Further, the side edge in the vertical direction of the common edge in the first compartment body is extended to form the side edge of the second compartment body.

[0023] Further, along the width or height direction of the beam body, the common edge of the second compartment body and the first compartment body is located in the range of one fifth to four fifths of the width or height of the beam.

[0024] Further, the end of the plate material is connected with the compartment body on the side of the common edge by means of spot welding or line welding.

[0025] Further, the first end of the plate material is bent to form a first bent edge, and the first bent edge is combined with the outer wall or the inner wall of one of the compartment bodies to form line welding.

[0026] Or the first bending edge is extended after being welded with the bin body, and forms a supporting force towards the inside of the bin body.

[0027] Further, when the two ends of the plate are bent and welded at the same time, the first bending edge and the second bending edge are located in the same bin body or in different bin bodies respectively.

[0028] Further, the first bending edge and / or the second bending edge are L-shaped or U-shaped, and the adjacent edges are connected by an arc in the L-shaped or U-shaped.

[0029] Further, the bending directions of the first bending edge and the second bending edge are the same, opposite or perpendicular.

[0030] Further, at least one reinforcing rib is arranged on the bin body in the circumferential direction.

[0031] Further, when the two bin bodies are provided with reinforcing ribs, at least two reinforcing ribs are arranged on the same side of the cavity structure, or on the parallel sides, or on the perpendicular sides.

[0032] Further, at least one of the two bin bodies is divided by the plate to form two sub-bin bodies with a common side.

[0033] Further, the two ends of the plate are located in one of the sub-bin bodies or in two sub-bin bodies by spot welding or line welding.

[0034] Further, the two ends of the plate are reversely bent, and form bending supporting forces of the bottom and the top of the sub-bin body respectively.

[0035] Further, the bin body is a closed structure.

[0036] The beneficial effects of the utility model are as follows:

[0037] In the utility model, the multiple-bin type beam is provided by cooperating multiple bins, thereby increasing the vertical height of the beam in a set direction, such as the height direction, forming a two-layer bin structure, thereby forming large and small bins, or upper and lower bins separated by a partition, or square side bin bodies, and the inertia moment of the cross section is enhanced by using the height difference or the volume difference.

[0038] In the utility model, the design of multiple bins realizes the force flow distribution path, so that part of the bin bodies share most of the shear force, and the other part of the bin bodies bear the bending moment. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The structure of the multiple-bin type beam is shown in the structure of the utility model.

[0040] Figure 2 Structure diagram two of the multi-compartment type cross beam provided by the utility model;

[0041] Figure 3 Structure diagram three of the multi-compartment type cross beam provided by the utility model;

[0042] Figure 4 Structure diagram four of the multi-compartment type cross beam provided by the utility model;

[0043] Figure 5 Structure diagram five of the multi-compartment type cross beam provided by the utility model;

[0044] Figure 6 Laying diagram one of the reinforcing rib provided by the utility model;

[0045] Figure 7 Laying diagram two of the reinforcing rib provided by the utility model;

[0046] Figure 8 Laying diagram three of the reinforcing rib provided by the utility model;

[0047] Figure 9 Laying diagram four of the reinforcing rib provided by the utility model;

[0048] Figure 10 Structure diagram six of the multi-compartment type cross beam provided by the utility model;

[0049] In the drawing:

[0050] 1, cross beam body; 2, compartment body; 21, first compartment body; 22, second compartment body; 3, common edge; 4, first bending edge; 5, second bending edge; 6, reinforcing rib; 7, common edge; 8, sub-compartment body. DETAILED DESCRIPTION

[0051] The utility model will be explained in detail below in combination with each embodiment shown in the drawings, but it should be explained that these embodiments are not the limitation of the utility model, and the equivalent transformation or substitution of function, method or structure made by the ordinary skill in the art according to these embodiments all belong to the protection scope of the utility model.

[0052] Referring to the drawings shown in the drawings, Figures 1-6 The multi-compartment type cross beam in the embodiment is used for the assembly of a commodity shelf or a goods shelf, comprising a cross beam body 1, the cross beam body 1 forms a cavity structure along the length direction, and a bearing area is formed on the cavity structure;

[0053] The cavity structure at least includes two bin bodies 2 connected by the common edge 3, and the height difference and / or volume difference between the two bin bodies 2 increases the moment of inertia at the cross section in the bearing area; here, the two bin bodies 2 can be the same height and then form a volume difference, or different heights to form a height difference, or both volume and height differences, and then use the differences to increase the moment of inertia, thereby increasing the overall stress.

[0054] In the embodiment, the common edge 3 forms the support points and support forces of the cavity structure in the support direction, and / or forms the pulling force of the cavity structure in the horizontal direction. That is, in the embodiment, the common edge is arranged in the vertical direction, mainly forming a support force, and the two ends of the common edge 3 form two support points, and then cooperate with the common edge to form a better support force in the vertical direction; when the common edge 3 is in the horizontal direction, it forms a horizontal pulling force. Of course, the common edge in the horizontal direction and the vertical direction can also be arranged at the same time, so at least three bin bodies are provided, thereby increasing the bearing and stability in any direction.

[0055] In the embodiment, the two bin bodies 2 form bin bodies with volume difference or height difference with each other, and the two bin bodies can be stacked on each other to form a height difference, or adjacent to each other to form a volume difference, or both.

[0056] In the embodiment, the two bin bodies 2 can be isolated by a partition, or directly cast into shape, in which case there is no connecting joint, or can be bent by a plate and the like. The specific introduction is as follows:

[0057] The first case is that the common edge between the two bin bodies 2 is divided by a partition, and at least one end of the partition is bent to form a flow path when stressed. At this time, the force is shunted by bending.

[0058] The second case is directly cast by a model, in which case the model is directly provided with a partition structure to form the common edge.

[0059] The third case is that the two bin bodies 2 are bent by a plate, and the end of the plate is bent to form the common edge or the side edge of the bin body to form a flow path when stressed. At this time, the end of the plate can be bent to form the common edge, or bent elsewhere.

[0060] Compared with the prior art, the two bin bodies 2 in the embodiment can be assembled to form upper and lower double bins or left and right double bins, thereby forming upper and lower bins or left and right bins. Of course, a plurality of bin bodies can also be continuously extended, and these bin bodies are connected by the common edge in the horizontal direction or the vertical direction, thereby increasing the width or height of the beam.

[0061] In this embodiment, the double-bin design of up and down or left and right provides a larger force flow distribution path, the upper or left and right smaller bin body shares most of the shear force, and the lower layer and the larger bin body in the left and right bin bear the bending moment effect; in this embodiment, the vertical inertia moment of the cross beam in the double bin is significantly improved compared with the single bin design, which enhances the bending stiffness and carrying capacity. The dividing line in the double bin can be adjusted according to the specific application scene and size, and the position of the dividing line formed by the common edge is within 40% of the middle part of the entire cross beam height.

[0062] The introduction between the two bins is as follows:

[0063] First, in this embodiment, the two bin bodies 2 form a first bin body 21 or a second bin body 22 with a volume difference. In terms of position relationship, the second bin body 22 can be stacked above the first bin body 21, or can be arranged on the side of the first bin body in the horizontal direction, and then the two are arranged adjacent in the horizontal direction. At this time, when stacked, a height difference is directly formed, and when arranged horizontally, the first bin body 21 is higher and the second bin body is lower, thereby directly forming a height difference.

[0064] In this embodiment, when placed horizontally, the first way is that the first bin body forms a regular shape, such as a square, and then the first bin body has only one height, and the second bin body 22 is lower; the second way is that the first bin body 21 forms an irregular shape, such as an L shape, and then the first bin body 21 is divided into two bin bodies with different heights, and the lower bin body is the same height as the second bin body 22. At this time, the side edge perpendicular to the common edge extends in the same direction to form the side edge of the second bin body 22.

[0065] In the second way, the second bin body 22 is located on the side of the first bin body 21, and a common edge 3 is formed between the first bin body 21 and the second bin body 22. In this embodiment, a round corner transition with an R within 1.5 mm is used at the common edge instead of a straight angle, thereby reducing stress concentration phenomenon, reducing stress concentration coefficient of the transition area, and improving overall fatigue resistance. According to the specific product application scene, the round corner can have a hook or no hook. Of course, in this embodiment, an arc transition can also be provided at the top corner of the bin body to improve the overall fatigue resistance.

[0066] In the second way, the cross section of the first bin body is an L-shaped structure, and the second bin body is located in the extension direction of the L-shaped structure. At this time, the second bin body is the same level as the first bin body in the horizontal direction, but in the height direction, it is the same height as the structure at the bottom of the L-shaped structure.

[0067] In this embodiment, along the width direction of the cross beam body 1, the common edge of the second bin body 22 and the first bin body 21 is located in the range of one-fifth to four-fifths of the cross beam width. Compared with the single bin design, the lateral stiffness of the left and right bin structure is increased by 35%-40%, effectively reducing the lateral instability and warping phenomenon. The boundary line formed by the common edge of the left and right bins can be adjusted according to the specific application scene and size, and the position of the boundary line is within 40% of the middle part of the entire cross beam width.

[0068] In this embodiment, the connection between the bent structure and the cavity can be spot welding, or line welding or local surface welding, thereby connecting the end of the plate to the bin body on the side of the common edge.

[0069] Specifically, the first end of the plate is bent to form a first bent edge 4, and the bending welding mode of the first bent edge 4 has the following modes:

[0070] 1) After bending, one of the bin body outer walls or the other bin body inner wall is fitted, and then line welding is formed;

[0071] 2) After the first bent edge 4 is line welded with the bin body, it is extended to form a supporting force towards the inside of the bin body, and at this time the extension part can be suspended in the cavity to form a hook mechanism;

[0072] In this embodiment, both ends of the plate can also be bent simultaneously to form a first bent edge 4 and a second bent edge 5 in the same bin body or in different bin bodies. At this time, the bending mode of the second bent edge can be the same as or different from that of the first bent edge.

[0073] In this embodiment, for the first bent edge 4 and the second bent edge 5, they can be set as L-shaped or U-shaped at the same time, or one is L-shaped and the other is U-shaped. For the L-shaped, it can be achieved by bending once, and for the U-shaped, it needs to be bent twice.

[0074] When bending, the bending directions of the first bent edge 4 and the second bent edge 5 are the same, opposite or perpendicular, such as referring to FIG. 1, FIG. 2 and FIG. 3. Figure 1 When the first bent edge 4 and the second bent edge 5 are both arranged in the small bin, they can be bent away from the large bin at the same time to form parallel arrangement in the same direction, as shown in FIG. 4. Figures 7-8 As shown in FIG. 5, one is bent towards the first bin body 21 and the other is bent towards the second bin body 22 in the opposite direction, of course, as shown in FIG. 6 or FIG. 7, one is bent in the height direction and the other is bent in the horizontal direction to form perpendicular bending, at this time it can be arranged in the same bin or in different bins. Figures 2-4 Figure 6

[0075] ​​In this embodiment, the two bent edges can also be bent to a length that is parallel to the common edge 3.

[0076] In order to increase the strength of the cavity, in this embodiment, at least one of the two cartridge bodies 2 is provided with a reinforcing rib 6 that is recessed or protrudes towards the inside of the cartridge body in the circumferential direction.

[0077] In this embodiment, the reinforcing rib 6 forms a drainage path that drains towards both sides of the cartridge body. In this embodiment, in order to increase the uniformity of the stress, the crossbeam of the heavy-duty shelf / rack is provided with a reinforcing rib in special customer application scenarios, the purpose of which is to improve the stability of the overall column. A T-shaped reinforcing rib can be added to the inner or outer side wall of the crossbeam, which changes the force flow path of the crossbeam and makes the overall structure stress uniform. The reinforcing rib disperses the stress in the stress area from a point to a larger area, significantly reducing the stress peak.

[0078] In this embodiment, the first cartridge body and the second cartridge body can be provided with a reinforcing rib, or both cartridge bodies can be provided with a reinforcing rib, and the reinforcing rib is generally provided on the outside of the cartridge body when it is provided.

[0079] When reinforcing ribs are provided on both cartridge bodies, the reinforcing ribs are located on the same side of the two cartridge bodies, or are provided on parallel sides of each other, or are provided on perpendicular sides of each other.

[0080] Referring to FIG. 1, Figure 9 In this embodiment, the first cartridge body and the second cartridge body are parallel, two reinforcing ribs 6 are provided at the first cartridge body 21, and only one reinforcing rib 6 is provided at the second cartridge body 22, which are recessed inward and face each other. At this time, the two ends are bent, the first bent edge 4 and the second bent edge 5 are parallel and reversely arranged, the first bent edge 4 is arranged at the top of the second cartridge body 22, and the second bent edge 5 is arranged at the bottom of the first cartridge body 21. At this time, the second bent edge 5 is not bent directly at the bottom, but extends upward and is attached to the common edge for a period of time before being bent, in order to increase the carrying capacity of the bottom.

[0081] Referring to FIG. 1, Figure 10 In this embodiment, at least one of the two cartridge bodies 2 is divided by a plate to form two sub-cartridge bodies 8 with a common edge. At this time, compared with the previous two cartridge bodies, there is one more cartridge body, and at this time the entire structure is provided with three cartridges, one cartridge body and two sub-cartridge bodies. The two sub-cartridge bodies can be parallel or perpendicular.

[0082] Specifically, in order to strengthen the structural support, in the embodiment, the unsegmented bin body 2 is at the top, and the bin body 2 composed of two sub-bin bodies 8 is at the bottom. The two ends of the plate are located in one of the sub-bin bodies 8 or in the two sub-bin bodies 8 respectively by means of spot welding or line welding, so that the sub-bin body 8 is supported.

[0083] When the two ends of the plate are bent, the two ends can be bent in opposite directions, which can disperse the support force in two directions. Alternatively, the two ends can be bent upward and downward respectively in the two sub-bin bodies 8, thereby forming bending support forces at the top and bottom of the sub-bin body respectively. In this case, the bottom bending is not directly bent, but is bent after being attached to one end of the common edge 7 upward, so that the strength of the segmented bin body 2 at the bottom is further increased.

[0084] In the embodiment, in order to further increase the strength, the bin body is of a closed structure. The closed structure is selected to avoid the instability of the open structure.

[0085] In the embodiment, a round corner transition design is selected at the top corner of the bin body and the connection between the bin bodies, that is, an R of 1.5 mm or less is used for the round corner transition design, so as to reduce the stress concentration coefficient of the transition area and further improve the fatigue life of the weld.

[0086] In the embodiment, the welding process is optimized, specifically, a continuous welding process is added at the common edge bending position (the bending welding position can be inside or outside), the stress on the weld is more uniform, the strength of the welding point is improved, and thus the stability is improved.

[0087] In the embodiment, multiple bin rooms similar to the above two ways can be added in the width or height direction of the cross beam to form a multi-bin structure, thereby improving the lateral stability and anti-lateral deformation capability.

[0088] In the embodiment, the upper and lower double-bin structure utilizes the improvement of the vertical moment of inertia and is more suitable for stable weighing scenarios. The carrying capacity is improved by 50%-300%, and the ultimate load capacity reaches more than 800 kg.

[0089] In the embodiment, the left and right double-bin structure enhances the lateral stiffness and is more suitable for dynamic and multi-point load environments, showing excellent stability. The carrying capacity is also improved by 50%-300%, and the ultimate load capacity of the shelf reaches more than 800 kg.

[0090] In order to enhance the bending stiffness and shear strength of the multi-bin cross beam in the embodiment, the vertical bending stiffness of the upper and lower double-bin design is improved by 50%-60%, and the horizontal shear strength of the left and right double-bin design is improved by 50%-60%.

[0091] The fatigue performance is optimized in the embodiment, specifically, the combination of the round corner transition design and the welding process effectively reduces the fatigue cracks in the stress concentration area, and the fatigue life is prolonged by more than 2 times.

[0092] The structural stability is improved in the embodiment, in the embodiment, the multi-layer force flow path optimization of the double-bin design makes the cross beam have higher anti-instability capacity in high load and dynamic scenarios.

[0093] In the embodiment, the multiple bins can also be realized by welding or other means, and the round corner radius can be optimized and adjusted according to the load conditions.

[0094] The effects of the embodiment are as follows:

[0095] Effects of the multiple-bin structure design:

[0096] 1) Increase the internal space of the cross beam, improve the bending stiffness and carrying capacity.

[0097] 2) Optimize the force flow path, significantly reduce the damage risk of the stress concentration area.

[0098] Effects of the round corner transition design:

[0099] By optimizing the mechanical properties of the transition area, the fatigue resistance and structural reliability are improved.

[0100] The bearing experiment in the embodiment:

[0101] The multiple-bin design in the embodiment remains stable under the condition of simulating the limit load, without obvious deformation or failure. The bearing is increased by 100%-300%.

[0102] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation mode of the utility model, and they are not used to limit the protection scope of the utility model, and equivalent implementation modes or changes made without departing from the spirit of the utility model art should be included in the protection scope of the utility model.

[0103] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0104] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A multi-compartment crossbeam for shelving or racking assembly, characterised in that, The utility model relates to a beam body, which comprises a cavity structure formed along the length direction, and a load-bearing area formed on the cavity structure. The cavity structure comprises at least two compartments connected by a common edge, and the two compartments have a height difference and / or a volume difference, which increases the moment of inertia at the cross section of the load-bearing area. The common edge is in the vertical and / or horizontal direction, and forms a support point and a support force of the cavity structure in the support direction, and / or forms a support point and a pulling force of the cavity structure in the horizontal direction. The common edge is a partition plate, and at least one end of the partition plate is bent to form a flow path under stress.

2. The multi-cell crossbeam of claim 1, wherein, The two compartments are formed by bending a plate, and the end of the plate is bent to form the common edge or the side edge of the compartment, so as to form a flow path under stress.

3. The multi-cell crossbeam of claim 1, wherein, The two compartments form a first compartment and a second compartment with a volume difference, and the second compartment is stacked on the first compartment or arranged on the horizontal side of the first compartment to form the height difference.

4. The multi-cell crossbeam of claim 1, wherein, The side edge of one side of the first compartment extends to form the side edge of the second compartment, so that the local part of the first compartment is at the same height as the second compartment.

5. The multi-cell crossbeam of claim 4, wherein, The side edge in the vertical direction of the common edge in the first compartment extends to form the side edge of the second compartment.

6. The multi-cell crossbeam of claim 5, wherein, In the width or height direction of the beam, the common edge of the second compartment and the first compartment is located in the range of one-fifth to four-fifths of the width or height of the beam body.

7. The multi-cell crossbeam of claim 4, wherein, The end of the plate is connected to the compartment on the side of the common edge by spot welding or line welding.

8. The multi-cell crossbeam of claim 3, wherein, The first end of the plate is bent to form a first bent edge, and the first bent edge is connected to the outer wall or the inner wall of one of the compartments to form a line weld.

9. The multi-cell crossbeam of claim 8, wherein, Or the first bent edge extends after line welding with the compartment and forms a support force towards the inside of the compartment. When both ends of the plate are bent and welded at the same time, the first bent edge and the second bent edge formed thereby are located in the same compartment or in different compartments respectively.

10. The multi-cell crossbeam of claim 9, wherein, The first bent edge and / or the second bent edge are L-shaped or U-shaped, and the adjacent edges are connected by an arc in the L-shaped or U-shaped structure.

11. The multi-cell crossbeam of claim 10, wherein, The bending directions of the first bent edge and the second bent edge are the same, opposite or perpendicular.

12. The multi-cell crossbeam of claim 11, wherein, At least one reinforcing rib is arranged on at least one of the two compartments in the circumferential direction and recessed or protrudes towards the inside of the compartment.

13. The multi-cell crossbeam of claim 1, wherein, When reinforcing ribs are arranged on both compartments, at least two reinforcing ribs are arranged on the same side of the cavity structure, on parallel sides or on perpendicular sides.

14. The multi-cell crossbeam of claim 13, wherein, At least one of the two compartments is divided by a plate to form two sub-compartments with a common edge.

15. The multi-cell crossbeam of claim 1, wherein, The two ends of the plate are located in one of the sub-compartments or in the two sub-compartments respectively by spot welding or line welding.

16. The multi-cell crossbeam of claim 15, wherein, The two ends of the plate are bent in opposite directions, and the bent support forces of the bottom and the top of the sub-compartments are formed respectively.

17. The multi-cell crossbeam of claim 16, wherein, The compartment is a closed structure.

18. The multi-compartment crossbeam according to any one of claims 1-17, wherein, ​

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