Cross beam for goods shelf or commodity shelf
By designing a closed cavity and stress-dispersing ribs, the load-bearing and stability issues of existing shelving beams are solved, achieving higher load-bearing capacity and structural stability, and extending service life.
Patent Information
- Application Number
- CN202520128265.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-11-20
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-20
AI Technical Summary
The existing shelving beams are insufficient in terms of load-bearing capacity, stability, and force transmission, and are prone to problems such as local stress concentration, structural failure, and swaying and tilting.
The design employs a closed cavity structure and stress-dispersing ribs to disperse stress, forming a fully enclosed beam structure that improves the tightness of the contact surface and evenly distributes stress.
It significantly improves the load-bearing capacity and structural stability of the beam, extends its service life, and reduces the risk of stress concentration and structural failure.
Smart Images
Figure CN223746034U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of crossbeam on goods shelf or commodity shelf, especially relates to crossbeam for goods shelf or commodity shelf. BACKGROUND
[0002] The existing commodity shelf is usually composed of crossbeam, stand and partition, in use, the strength of the crossbeam directly affects the bearing capacity and stability of the commodity shelf. The commodity shelf commonly seen in the market usually adopts the connecting structure of semi-wrapping crossbeam and stand. The design process is simple, and the cost is low, but the following problems exist in actual use:
[0003] 1) the bearing capacity is limited, especially the connecting surface area of the semi-wrapping design is limited, and then the local stress concentration occurs, which makes it prone to cracks or bending deformation in long-term use, and prone to structural failure caused by local stress concentration.
[0004] 2) poor stability, the stress surface is reduced, such as the rigidity of the semi-triangle is insufficient, the whole structure is prone to shaking and tilting after being stressed, and then the connecting part is prone to loosening or deformation.
[0005] 3) the inclined edge of the traditional crossbeam does not reach the bottom layer, which blocks the vertical force transmission of the crossbeam, and finally causes the triangular structure to be unreasonable in stress distribution, and there is a risk of gravity center deviation.
[0006] 4) the essence of the traditional crossbeam is to form a semi-wrapped triangle structure after one bending of a plate, and the overall bearing (using 0.3mm plate) is between 50-100kg. INVENTION CONTENTS
[0007] The utility model aims at providing crossbeam for goods shelf or commodity shelf, which increases the closed cavity and stress dispersion rib, so that the whole strength is increased, and then the support strength and service life of the subsequent goods shelf or commodity shelf are improved.
[0008] To achieve the above purpose, the utility model realizes through the following technical scheme.
[0009] The crossbeam for goods shelf or commodity shelf comprises,
[0010] The crossbeam body is partially bent to form a closed cavity, and a support surface for bearing the partition is formed on the closed cavity;
[0011] The cross section of the closed cavity is polygonal.
[0012] Further, the closed edge of the closed cavity is formed with stress dispersion ribs which are recessed or protruded along the closed cavity or extend towards the inside of the closed cavity, the support surface is subjected to stress from the partition plate and / or the objects on the partition plate, forming a stress area, and the stress dispersion ribs make the stress tend to be concentrated in a line or a plane.
[0013] Further, the stress dispersion ribs make at least part of the closed edge form a stress dispersion track away from the closed edge to disperse the stress.
[0014] Further, the stress dispersion ribs are connected to the closed edge in a circular arc connection, a necked cavity connection or a T-shaped connection.
[0015] Further, the closed cavity comprises at least three closed edges, and adjacent closed edges are connected by a first stress dispersion curved surface.
[0016] Further, the first stress dispersion curved surface is a rounded transition structure, and the R value of the rounded transition structure is within 1.5 mm.
[0017] Further, the cross beam body further comprises a protective edge extending outwardly from the closed edge of the closed cavity, and the protective edge is bent towards the closed cavity on the side away from the closed cavity to form a first bent edge.
[0018] Further, the first bent edge is located on the same side of the closed cavity as the protective edge, and the first bent edge and the protective edge form a groove body with an opening towards the closed cavity or a double-layer structure in which the first bent edge and the protective edge are attached to each other.
[0019] Further, in the double-layer structure, the first bent edge and the protective edge are welded.
[0020] Further, the first bent edge extends and is connected to the closed cavity to form the double-layer structure in communication with the closed cavity.
[0021] Further, the closed cavity is connected to the protective edge at a bent portion to form a second bent edge welded to the protective edge, or the closed edge at the closed portion of the closed cavity is bent towards the inside of the closed cavity to form the second bent edge, and the second bent edge is located in the closed cavity or extends out of the closed cavity.
[0022] Further, the second bent edge welded to the protective edge is provided with a second stress dispersion curved surface at the welding portion of the second bent edge and the protective edge.
[0023] The beneficial effects of the utility model are as follows:
[0024] In the utility model, compared with the traditional semi-open bearing cavity, the closed cavity formed by full cladding makes the contact surface subjected to stress more compact during the subsequent contact of the cross beam and the partition plate, thereby reducing the shear force and bending moment on the contact surface and improving the strength.
[0025] The stress dispersion rib is added in the utility model, stress that whole bearing cavity receives can obtain timely decomposition and dispersion, avoid the problem of stress concentration, effectively disperse external force, avoid the structure failure caused by single point stress too large. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 The structure schematic view of the cross beam for the goods shelf or the commodity shelf provided by the utility model is shown in one of the following figures;
[0027] Figure 2 The structure schematic view of the stress dispersion rib provided by the utility model is shown in one of the following figures;
[0028] Figure 3 The structure schematic view of the stress dispersion rib provided by the utility model is shown in two of the following figures;
[0029] Figure 4 The structure schematic view of the stress dispersion rib provided by the utility model is shown in three of the following figures;
[0030] Figure 5 The structure schematic view of the first bending edge provided by the utility model is shown in one of the following figures;
[0031] Figure 6 The structure schematic view of the first bending edge provided by the utility model is shown in two of the following figures;
[0032] Figure 7 The structure schematic view of the first bending edge provided by the utility model is shown in three of the following figures;
[0033] Figure 8 One of the structure schematic views of the closed cavity provided by the utility model is shown in the following figure;
[0034] Figure 9 Another structure schematic view of the closed cavity provided by the utility model is shown in the following figure;
[0035] In the figure:
[0036] 1, cross beam main body; 11, rivet; 2, closed cavity; 21, support surface; 22, closed edge; 23, first stress dispersion curved surface; 3, stress dispersion rib; 4, protection edge; 41, first bending edge; 42, second bending edge; 43, second stress dispersion curved surface. DETAILED DESCRIPTION
[0037] The utility model will be explained in detail in combination with each embodiment shown in the figure, 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 skilled in the art according to these embodiments all belong to the protection scope of the utility model.
[0038] Refer to the drawings Figures 1-7 As shown in the drawings, the crossbeam for the shelf or the storage rack in the embodiment comprises a crossbeam body 1, which is partially bent to form a closed cavity 2, and a support surface 21 for bearing the partition plate is formed on the closed cavity 2. In the embodiment, the whole crossbeam body 1 is upgraded from the semi-wrapping design to the full-wrapping design, thereby increasing the contact area. At this time, the full-wrapping design forms a closed cavity, and the closed cavity makes the contact between the crossbeam and the partition plate more closely when stressed, thereby reducing the shear force and the bending moment on the contact surface.
[0039] A stress dispersion rib 3 extending into the closed cavity or protruding from the closed cavity is formed on the closed edge 21 of the closed cavity 2. The support surface 22 is subjected to the stress of the partition plate and / or the articles on the partition plate, thereby forming a stress area. The stress dispersion rib 3 makes the stress tend to be linearly concentrated or surface-concentrated from the point concentration. In the embodiment, the stress dispersion rib is added, thereby making the stress well decomposed and avoiding the stress concentration problem, and improving the support strength. In the embodiment, one of the closed edges 21 forms the support surface.
[0040] In actual work, the stress dispersion rib 3 makes at least part of the closed edge form a stress dispersion track away from the closed edge, so as to disperse the stress.
[0041] In the embodiment, the stress dispersion rib 3 has at least three structures, which are as follows:
[0042] The first structure is that the stress dispersion rib 3 directly protrudes into the closed cavity to form a recessed part on the closed edge.
[0043] The second structure is that the stress dispersion rib 3 protrudes from the surface of the closed cavity to form a protruding part on the closed edge.
[0044] The third structure is that one of the closed edges extends into the closed cavity to form an extension structure extending into the closed cavity, which is combined with one of the closed edges to increase the bearing stress, such as the vertical closed edge.
[0045] In the embodiment, the above three stress dispersion ribs 3 exist alone, in pairs or all together.
[0046] In the embodiment, the stress dispersion rib 3 is introduced as follows:
[0047] In the structural design, the stress dispersion rib 3 in the embodiment is an expanding slot with gradually expanding opening, and the opening of the expanding slot is connected with the closed edge. In the embodiment, the force at the middle part can be dispersed by the expanding mode.
[0048] Specifically, the two sides of the opening of the diameter expansion groove are connected by a point or a connecting edge or integrally formed.
[0049] In the case of heavy load, the bottom of the beam body 1 will be deformed or broken due to stress concentration. In this embodiment, the stress dispersion rib is designed, that is, the recess or protrusion is realized by bending, and then the T-shaped (inside and outside) or triangular structure or circular arc structure is formed, thereby changing the force flow path on the beam body 1 and making the overall structure stress uniform. The stress dispersion rib 3 disperses the stress of the stress area from the point to a larger area, significantly reducing the stress peak. At the same time, the stress dispersion rib 3 increases the cross-sectional moment of inertia of the beam, enhances the bending resistance of the structure, and effectively reduces the bending and lateral deformation of the beam.
[0050] In this embodiment, the shape of the stress dispersion rib 3 is T-shaped, circular arc-shaped and triangular. The position of the reinforcing rib can be bent according to actual needs, and the detailed structure is as follows:
[0051] For the triangular structure, the two sides of the opening of the diameter expansion groove form a triangular point connection, and the side on the same side as the closed edge is empty. At this time, the triangle faces the inside of the closed cavity, and is a neck cavity, forming a triangular apex inside the closed cavity.
[0052] For the T-shaped structure, the two sides of the opening of the diameter expansion groove are connected by a connecting edge located inside the closed cavity. At this time, the two sides form an angle or a circular arc with the connecting edge.
[0053] For the circular arc structure, the circular arc is directly connected to the two ends of the closed edge by being recessed towards the inside of the closed cavity.
[0054] In this embodiment, the closed cavity is introduced as follows:
[0055] In this embodiment, the closed cavity 2 includes at least three closed edges 22, and the adjacent closed edges 22 are connected by a first stress dispersion curved surface 23. At this time, the closed edge does not choose a sharp angle, thereby improving the stress distribution and making the force decomposition more reasonable, effectively reducing the shear burden of the beam. At the same time, in the case of alternating load, the stress concentration point will cause local fatigue damage of the material, thereby reducing the strength and service life of the structure.
[0056] Preferably, the first stress dispersion curved surface 23 is a round corner transition structure, and the R value of the round corner transition structure is within 1.5 mm. At this time, the included angle range of the round corner transition structure can be 15°-70°, so that it is easy to bend.
[0057] In this embodiment, the bending welding can also be arranged at multiple places, such as at the connection between the beam body and the closed cavity or the protective edge formed by extension, and the details are as follows:
[0058] Referring to the drawings, the beam body 1 further comprises a protective edge 4 connected with the closed cavity 2 and extending outward through the closing edge 22 of the closed cavity 2, and the side of the protective edge 4 away from the closed cavity 2 is bent to form a first bending edge 41 toward the closed cavity 2. In this embodiment, the first bending edge 41 further makes the protective edge 4 also have a welding point bending during subsequent assembly, so as to disperse the vertical force.
[0059] In this embodiment, the first bending edge 41 is located on the same side of the protective edge 4 as the closed cavity 2, thereby forming a groove toward the closed cavity between the first bending edge 41 and the protective edge 4, such as an inverted U-shaped structure, or the two are attached to form a double-layer structure.
[0060] When the first bending edge 41 and the protective edge 4 form a double-layer structure, the two can be directly attached or fixed by welding.
[0061] In this embodiment, when attached, the length of the first bending edge 41 occupies a part of the protective edge 4, and the entire first bending edge 41 can also extend inward, thereby communicating with the closed cavity, and at this time, a double-layer structure communicating with the closed cavity is formed.
[0062] In this embodiment, under some special bearing requirements, in order to achieve a fully closed triangular beam structure, in addition to the above double bending mode, a top back bending mode can also be used. The advantage of this structure is to increase the anchoring force, which is helpful for the connection between the beam and the column under the condition of uniform bearing and large bearing. Bending and welding are performed at the left bottom or right bottom to achieve cross-section closure, and a multi-point uniform welding mode is used in the welding area to improve the welding strength.
[0063] For the bending structure of welding, in this embodiment, it can also be arranged at the connection between the closed cavity and the protective edge, at this time, specifically, a second bending edge 42 is bent to form a welding with the protective edge 4, and the second bending edge 42 is located in the closed cavity 2 or extends out of the closed cavity. At this time, the second bending edge 42 can be upward or horizontally downward.
[0064] In this embodiment, for the second bending edge 42, one is connected with the protective edge 4 through the second stress dispersion curved surface 43. Further, it is close to the protective edge 4, but its direction is towards or opposite to the end of the protective edge 4. In this embodiment, the radian curved surface design is actually carried out at least at two connection places, that is, between the adjacent closed edges 22 and at the connection place of the second bending edge 42 and the protective edge 4, so as to avoid the stress concentration phenomenon of sharp corners through smooth transition, make the load distribution more uniform, and reduce the stress peak value of the local area. This significantly improves the fatigue resistance and safety of the overall structure. The stress concentration coefficient can be reduced by 25-70%, and the stress is uniformly distributed along the curved surface, which significantly improves the structural reliability.
[0065] Referring to the accompanying drawings Figure 6 As shown in the drawings, in this embodiment, the second bending edge 42 can also be arranged at the closed place of the closed cavity. At this time, the closed edge is bent towards the inside of the closed cavity to form the second bending edge. At this time, the second bending edge 42 can be located at any one corner of the triangular closed cavity, and then abuts with the inner wall of the closed edge in the extension direction. Further, at this time, the second bending edge 42 can be upward, downward or inclined.
[0066] In the prior art, the connection place of the beam body 1 and the column is also included. In this embodiment, in order to increase the strength at this place, a separate rivet 11 is also added at this place. When the rivet 11 is arranged at the protective edge 4 at the connection place, the rivet 11 is arranged on the protective edge 4. In this embodiment, when the rivet 11 forms an anchoring point and is assembled with the column, the rivet 41 is bent to form a hook.
[0067] In this embodiment, the cross section of the closed cavity 2 can be polygonal, such as triangular, quadrangular or pentagonal, etc. In the drawings of this embodiment, only the schematic diagrams of triangular and quadrangular are given.
[0068] This embodiment has the following effects:
[0069] 1. The bearing capacity is improved: the design in this embodiment, together with the column, makes the overall bearing capacity improved by 2 times (the bearing capacity will change with the length of the beam and the thickness of the plate, and this data is based on the experiment of different measurement structures with the same plate and the same length).
[0070] 2. The structural stability is significantly improved: in this embodiment, the optimized closed cavity design forms a full cladding structure, and then the full cladding beam effectively reduces the overall shaking and deformation risk, and enhances the anti-overturning ability of the structure.
[0071] 3. The use scene is more diversified: the design of the non-equilateral triangular closed cavity adapts to different space requirements, and enhances the application flexibility of the shelf / rack in multiple scenes.
[0072] In this embodiment, in addition to the full-wrapping design, welding or riveting can be used to achieve similar connection strength in the fixing mode of the beam body 1 and the column.
[0073] In this embodiment, the angle of the isosceles triangle of the protective ring can be further adjusted to 15°-70° to adapt to different usage requirements in different scenarios.
[0074] In this embodiment, the structure reduces the maximum stress of the overall structure by about 40% and the maximum deformation by about 50% in use.
[0075] Under the condition of the same material, the conventional semi-wrapping beam design in the prior art has a regular load bearing of 30k-100KGg (the load bearing changes with the length and thickness of the plate, and this data is based on experiments on different measurement structures with the same plate and length), and the improved design has a regular load bearing of 60-200kg or even more, with a 2-fold increase in load bearing.
[0076] In this embodiment, the beam formed by the stress dispersion rib process of bending, curved surface, and reinforcing rib also shows excellent fatigue resistance in multiple cycle loading tests.
[0077] In this embodiment, when the rectangular quadrilateral is used to form the closed cavity 2, two bending designs, i.e., the first bending edge and the second bending edge, can also be added to improve the shear resistance and compression resistance through multi-layer support. The bending (divided into upper bending and lower bending) of the second bending edge 42 connected with the closed cavity 2 and welding are used to increase the connectivity while dispersing the vertical force. The first bending edge can also be a rivet, and the bending at this position is used to increase the adhesion of the corresponding anchor point. The two bendings and the welding of one of the bendings form a multi-stage support structure, effectively dispersing external forces and avoiding structural failure caused by excessive stress on a single point.
[0078] In the rectangular closed cavity, a top back bending method can also be used, i.e., the first bending edge is arranged at the riveting position to increase the adhesion of the anchor point, which is helpful for the connection of the beam and the column in the case of uniform load bearing and high load bearing. Bending and welding are performed at the left bottom or right bottom to achieve cross-section closure, and a multi-point uniform welding method is used in the welding area to improve the welding seam strength.
[0079] Referring to the drawings Figure 8The closed cavity 2 in the beam body 1 in the embodiment is triangular in structure, and the end thereof extends to form a protective edge 4 and a rivet 11 for assembly with a stand column, one side of the triangular structure extends to form the protective edge 4, and a first stress dispersion curve is arranged on the side and the protective edge, the first stress dispersion curve is a triangular recess structure towards the inside of the square, and through the two arrangement modes, the weight of the entire beam is guaranteed. The rivet 11 is a hook structure at this time. A second bending edge 42 that bends towards the inside of the triangle is also included.
[0080] Referring to the accompanying drawings Figure 1 and 7 As shown in the drawings, in the embodiment, for the first bending edge 41, when a rivet is needed, the first bending edge 41 is generally a structure that locally adheres towards the protective edge, thereby increasing the strength at the rivet position, and when a rivet is not needed, a reversed U-shaped groove structure is preferred.
[0081] The above series of detailed descriptions are only specific descriptions of the feasible implementation modes of the utility model, and they are not used to limit the protection scope of the utility model, and equivalent implementation modes or changes that do not deviate from the spirit of the utility model art should be included in the protection scope of the utility model.
[0082] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, the scope of the utility model is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure reference in the claims should not be regarded as limiting the involved claims.
[0083] 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 manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A crossbeam for a shelf or storage unit, characterized in that, include, A crossbeam body, wherein the crossbeam body is partially bent to form a closed cavity, and a support surface for supporting the partition is formed on the closed cavity; The cross-section of the enclosed cavity is polygonal.
2. The beam for a shelf or storage unit according to claim 1, characterized in that, Stress-dispersing ribs are formed on the closed edge of the closed cavity, either recessed or raised along the closed cavity, or extending toward the inside of the closed cavity. The supporting surface is subjected to stress from the partition and / or the items on the partition, forming a stress-bearing area. The stress-dispersing ribs cause the stress to change from a point concentration tendency to a line concentration or surface concentration tendency.
3. The crossbeam for a shelf or storage unit according to claim 2, characterized in that, The stress-dispersing ribs cause at least a portion of the closed edge to form a stress-dispersing trajectory away from the closed edge, thereby dispersing the stress.
4. The beam for a shelf or storage unit according to claim 3, characterized in that, The stress-dispersing ribs are connected to the closed edge by an arc, a constricted cavity, or a T-shaped connection.
5. The crossbeam for a shelf or storage unit according to claim 1, characterized in that, The enclosed cavity includes at least three enclosed sides, and adjacent enclosed sides are connected by a first stress dispersion surface.
6. The beam for a shelf or storage unit according to claim 5, characterized in that, The first stress dispersion surface is a rounded transition structure, and the R value of the rounded transition structure is within 1.5 mm.
7. The crossbeam for a shelf or storage unit according to claim 1, characterized in that, The main body of the beam also includes a protective edge extending outward from the closed edge of the closed cavity, and the side of the protective edge away from the closed cavity is bent toward the closed cavity to form a first bent edge.
8. The beam for a shelf or storage unit according to claim 7, characterized in that, The first bent edge and the closed cavity are located on the same side of the protective edge, and the first bent edge and the protective edge form a groove with the opening facing the closed cavity or a double-layer structure in which the two are attached.
9. The beam for a shelf or storage unit according to claim 8, characterized in that, In the double-layer structure, the first bent edge that fits together is welded to the protective edge.
10. The beam for a shelf or storage unit according to claim 9, characterized in that, The first bent edge extends and connects to the closed cavity to form the double-layer structure communicating with the closed cavity.
11. The beam for a shelf or storage unit according to claim 7, characterized in that, The connection between the enclosed cavity and the protective edge is bent to form a second bent edge that is welded to the protective edge, or the enclosed edge located at the closure of the enclosed cavity is bent toward the inside of the enclosed cavity to form the second bent edge, the second bent edge being located inside the enclosed cavity or extending outside the enclosed cavity.
12. The beam for a shelf or storage unit according to claim 11, characterized in that, The second bent edge, which is welded to the protective edge, has a second stress-dispersing curved surface at the welding point with the protective edge.