A rack

Abstract

This invention discloses a frame comprising a first profile, a second profile, and profile connectors. The first profile includes three or more profile units arranged rotationally symmetrically, with a connecting groove formed between adjacent profile units. The second profile is arranged adjacent to the first profile and has mounting holes. The profile connectors connect the connecting grooves of the first profile to the mounting holes of the second profile. This improves the load-bearing capacity of the frame and reduces costs.

Description

Technical Field

[0001] This invention belongs to the field of structural components, and particularly relates to a frame. Background Technology

[0002] In industrial automated production lines and machinery frames, profiles are widely used as frame structure materials due to their advantages such as light weight, corrosion resistance, and ease of processing. Common profile cross-sectional shapes include square tubes, rectangular tubes, round tubes, and industrial aluminum profiles with connecting grooves.

[0003] Existing aluminum profiles, when meeting the requirements of high strength and high stiffness, typically employ a solid structure, resulting in a significant increase in weight, which is detrimental to lightweight design and also increases material costs. On the other hand, while some hollow profiles can reduce weight, their bending stiffness and strength are limited due to the inherent properties of the material itself. They are prone to deformation when subjected to large bending moments or complex loads, affecting the stability and reliability of the overall frame. Summary of the Invention

[0004] The main objective of this invention is to provide a rack that improves the load-bearing capacity of the support and reduces costs.

[0005] The present invention achieves the above objectives through the following technical solutions: The frame includes a first profile, a second profile, and profile connectors. The first profile includes three or more profile units arranged in a rotationally symmetrical manner, with a connecting groove formed between two adjacent profile units. The second profile is arranged adjacent to the first profile, and mounting holes are provided on the second profile. The profile connectors connect the connecting groove of the first profile to the mounting holes of the second profile.

[0006] In one alternative embodiment, the profile unit includes a first outer plate having two opposing side plates; a first inner plate extending inward from one side plate of the first outer plate; a first support plate extending away from the side plate of the first inner plate in a direction away from the first outer plate; and a first connecting plate connected to the side plate of the first support plate. The second outer plate extends from the other side of the first outer plate, and the surfaces of the second outer plate and the first outer plate are arranged at an angle; the second inner plate extends inward from one side of the second outer plate; the second support plate extends from the edge of the second inner plate away from the second outer plate, and the surfaces of the second support plate and the first support plate are close to or abut against each other; one side of the second connecting plate is connected to the edge of the second support plate, and the other side of the second connecting plate extends away from the first connecting plate. The first connecting plate of a profile unit and the second connecting plate of another adjacent profile unit are interconnected to form a whole, and the first connecting plates and second connecting plates of three or more profile units are enclosed to form a first cavity.

[0007] In one optional embodiment, the frame further includes a first transition plate and a second transition plate. The first transition plate is located between the first inner plate and the first support plate, and the two side edges of the first transition plate are respectively connected to the first inner plate and the first support plate. The second transition plate is located between the second inner plate and the second support plate, and the two side edges of the second transition plate are respectively connected to the second inner plate and the second support plate.

[0008] In one optional embodiment, there are four profile units, and the outer contour of the first profile cross section formed by the four profile units is generally square, with a connecting groove formed between two adjacent profile units.

[0009] In one optional embodiment, the profile unit is constructed by bending sheet metal, and the first connecting plate of one profile unit and the second connecting plate of another adjacent profile unit are welded to form a weld. The first connecting plate and the second connecting plate of the remaining adjacent profile units are integral structures formed by bending sheet metal.

[0010] In one alternative embodiment, the first outer plate, the first inner plate, the first transition plate, the second outer plate, the second inner plate, and the second transition plate enclose to form a second cavity.

[0011] In one alternative embodiment, the frame further includes a base plate located below the first profile and the second profile, and threaded holes are formed on the surface of the base plate. The profile connector includes a connecting structure, which includes a base plate with at least one first through hole. A first plate is located in a connecting groove on one side of the first profile and is connected to the base plate. The surface of the first plate and the surface of the base plate are opposite to each other and spaced apart. A first connecting hole is provided on the first plate. A first nut is riveted to the first connecting hole, and the screw hole of the first nut is arranged corresponding to a first through hole on the base plate. A horizontal plate is connected to one side of the base plate, and the surface of the horizontal plate and the surface of the base plate are arranged at an angle. At least one second through hole is provided on the horizontal plate, and the horizontal plate is in contact with the top surface of the second profile. The first screw passes through a first through hole on the substrate and connects to the first nut on the first plate to lock the connection groove between the substrate and the first profile; the third screw passes through the second through hole on the horizontal plate and the mounting hole of the second profile and connects to the bottom plate by thread.

[0012] In one optional embodiment, the connecting structure further includes a second plate, which is connected to the substrate. The surface of the second plate is opposite to and spaced apart from the surface of the substrate. A second connecting hole is formed on the second plate. The second plate and the first plate are both located on the same side of the substrate. A second nut is riveted and fixed to the second connecting hole. The screw hole of the second nut is arranged corresponding to another first through hole on the substrate. The second screw passes through another first through hole on the substrate and connects to the second nut on the second plate to lock the connection groove between the substrate and the first profile.

[0013] In one optional embodiment, the first plate is connected to the substrate by an upper bending plate, the width of the first plate is greater than the width of the connecting groove of the first profile, and the width of the upper bending plate is less than the width of the connecting groove of the first profile. The second plate is connected to the base plate via a lower bending plate. The width of the second plate is greater than the width of the connecting groove of the first profile, and the width of the lower bending plate is less than the width of the connecting groove of the first profile.

[0014] In one optional embodiment, the two connecting structures are arranged in a mirror symmetrical manner, the substrates of the two connecting structures are connected side by side, the substrates of the two connecting structures are formed by bending a single plate, and the surfaces of the substrates of the two connecting structures are arranged at an angle. The first plate of one connecting structure is located in the connecting groove on one side of the first profile, and the first plate of the other connecting structure is located in the connecting groove on the other side of the first profile. In one alternative embodiment, the frame further includes a third profile, with two horizontal plates abutting the top surfaces of the second and third profiles respectively; and a third screw passing through a second through hole on the horizontal plate, a mounting hole in the third profile, and a threaded hole on the bottom plate.

[0015] Compared with the prior art, the present invention has the following technical effects: By arranging three or more profile units of the first profile in a rotationally symmetrical manner, the load-bearing capacity is improved and the manufacturing cost is reduced. Attached Figure Description

[0016] Figure 1 This is a 3D view of the rack; Figure 2 This is an end view of the first profile of the present invention; Figure 3 for Figure 2 Enlarged view of a single profile unit; Figure 4 This is a perspective view of the first profile of the present invention; Figure 5 This is an end view of the first profile in another embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of a single profile unit; Figure 7 This is a perspective view of the first profile in another embodiment of the present invention; Figure 8 This is a perspective view of the profile connector of the present invention; Figure 9 for Figure 8 A stereoscopic view from another perspective; Figure 10 for Figure 8 A stereoscopic view from another perspective; Figure 11This is a 3D view of the rack; Figure 12 for Figure 11 A stereoscopic view from another perspective; Figure 13 for Figure 12 A 3D view of the base plate after it has been hidden; Figure 14 This is a perspective view of one embodiment of the frame of the present invention; Figure 15 This is a side view of a partial structure of the frame of the present invention; Figure 16 for Figure 15 Sectional view along the AA direction. Detailed Implementation

[0017] The following is combined Figures 1 to 16 The present invention will now be described.

[0018] like Figure 1 As shown, a frame includes a first profile 10a, a second profile 10b, and a profile connector. The first profile 10a has a connecting groove 15. The profile connector connects the connecting groove 15 of the first profile 10a to the second profile 10b.

[0019] like Figure 2 As shown, the first profile includes three or more profile units, with a connecting groove 15 formed between two adjacent profile units. The connecting groove 15 is a standard connection interface, which can easily install bolts, nuts or connectors without additional processing, thus improving the assembly efficiency and connection reliability of the profile.

[0020] like Figure 3 As shown, the profile unit includes a first outer plate 11a, a first inner plate 11b, a first support plate 11d, a first connecting plate 11e, a second outer plate 12a, a second inner plate 12b, a second support plate 12d, and a second connecting plate 12e.

[0021] The first outer plate 11a has two opposing side plates; the first inner plate 11b extends inward from one side plate edge of the first outer plate 11a; the first support plate 11d extends away from the plate edge of the first inner plate 11b in a direction away from the first outer plate 11a; the first connecting plate 11e is connected to the plate edge of the first support plate 11d.

[0022] The second outer plate 12a extends from the other side of the first outer plate 11a, and the second outer plate 12a and the first outer plate 11a are arranged at an angle; the second inner plate 12b extends inward from one side of the second outer plate 12a; the second support plate 12d extends from the side of the second inner plate 12b away from the second outer plate 12a, and the second support plate 12d is close to or abuts the first support plate 11d; one side of the second connecting plate 12e is connected to the side of the second support plate 12d, and the other side of the second connecting plate 12e extends away from the first connecting plate 11e.

[0023] Three or more profile units are arranged in a rotationally symmetrical manner. The first connecting plate 11e of one profile unit and the second connecting plate 12e of another adjacent profile unit are interconnected to form a whole. The first connecting plates 11e and the second connecting plates 12e of the three or more profile units enclose and form a first cavity 13.

[0024] Multiple profile units arranged in a rotationally symmetrical manner are interconnected and enclose a first cavity 13. The second support plate 12d is close to or in contact with the first support plate 11d. The two support plates can bear the load simultaneously, which significantly improves the overall structural strength and bending stiffness of the profile and facilitates manufacturing and assembly. The profile of this invention is a non-solid structure, suitable for frame structures requiring lightweight and high strength, while also reducing material costs.

[0025] The second profile 10b may have the same structure as the first profile 10a, or the second profile 10b may have a different structure than the first profile 10a.

[0026] The first profile 10a also includes a first transition plate 11c and a second transition plate 12c. The first transition plate 11c is located between the first inner plate 11b and the first support plate 11d. The two sides of the first transition plate 11c are connected to the first inner plate 11b and the first support plate 11d, respectively. The second transition plate 12c is located between the second inner plate 12b and the second support plate 12d, and the two sides of the second transition plate 12c are connected to the second inner plate 12b and the second support plate 12d respectively.

[0027] Two transition plates smoothly connect the inner plate and the support plate, effectively reducing stress concentration, improving the fatigue resistance and structural stability of the profile, and extending its service life.

[0028] When the width of the first transition plate 11c is 0mm, that is, the first inner plate 11b and the first support plate 11d are formed by directly bending sheet metal, there is no indirect transition between the first inner plate 11b and the first support plate 11d. When the width of the second transition plate 12c is 0mm, that is, the second inner plate 12b and the second support plate 12d are formed by directly bending sheet metal, there is no indirect transition between the second inner plate 12b and the second support plate 12d.

[0029] The width of the first transition plate 11c can be in the range of 0~10mm, and the width of the first transition plate 11c can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm. The width of the second transition plate 12c can be in the range of 0~10mm.

[0030] like Figure 3 and Figure 4 As shown, there are four profile units, and the overall outer contour of the profile cross-section formed by the four profile units is square. The square cross-section contour makes the profile easy to install with other square components (such as connectors and panels), improving space utilization and assembly convenience, and is suitable for right-angle connection scenarios such as racks.

[0031] The profile unit is constructed by bending sheet metal. The first connecting plate 11e of one profile unit and the second connecting plate 12e of another adjacent profile unit are welded to form a weld 14. The first connecting plate 11e and the second connecting plate 12e of the remaining adjacent profile units are integral structures formed by bending sheet metal.

[0032] By combining integral bending and local welding, the overall continuity and strength of the profile are ensured, while the manufacturing difficulty of complex sections is reduced, and production efficiency and dimensional accuracy are improved.

[0033] The length of the first profile section is 20mm~200mm, and the width of the first profile section is 20mm~200mm; the length-to-width ratio of the profile section is 1:1~3:1.

[0034] Offering a variety of specifications and a reasonable width-to-length ratio, the first profile can adapt to different load-bearing requirements and installation spaces, enhancing the product's versatility and applicability.

[0035] The length and width of the first profile section are 40mm and 40mm respectively; or, the length and width of the first profile section are 50mm and 50mm respectively; or, the length and width of the first profile section are 60mm and 60mm respectively; or, the length and width of the first profile section are 70mm and 70mm respectively; or, the length and width of the first profile section are 80mm and 80mm respectively; or, the length and width of the first profile section are 90mm and 90mm respectively; or, the length and width of the first profile section are 100mm and 100mm respectively; or, the first... The length and width of the first profile section are 120mm and 120mm respectively; or, the length and width of the first profile section are 140mm and 140mm respectively; or, the length and width of the first profile section are 160mm and 160mm respectively; or, the length and width of the first profile section are 60mm and 40mm respectively; or, the length and width of the first profile section are 80mm and 40mm respectively; or, the length and width of the first profile section are 80mm and 60mm respectively; or, the length and width of the first profile section are 100mm and 80mm respectively.

[0036] The wall thickness of the first profile is 0.6~1.5mm. Specifically, the wall thickness of the first profile can be 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm.

[0037] like Figures 2 to 4 As shown, the first connecting plate and the second connecting plate of the first profile are both arc-shaped plates, and the cross-sectional profile of the first cavity 13 is circular or elliptical.

[0038] The first profile of the present invention also provides another embodiment, such as... Figures 5 to 7 As shown, the first connecting plate and the second connecting plate of the first profile are both flat, and the cross-sectional profile of the first cavity 13 is generally square.

[0039] When the cross-section of the first cavity 13 is circular, the diameter of the first cavity 13 is 12mm~20mm, specifically 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm.

[0040] When the cross-section of the first cavity 13 is square, the side length of the first cavity 13 is 12mm~20mm, specifically 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm.

[0041] The present invention provides specific dimensional parameters of a first profile, wherein the cross-sectional length and width of the first profile are 40mm and 40mm respectively, the cross-section of the first cavity 13 of the first profile is square with a side length of 17mm, and the wall thickness of the first profile is 0.8mm.

[0042] The present invention provides another specific dimensional parameters of the first profile, wherein the cross-sectional length and width of the first profile are 40mm and 40mm respectively, the cross-section of the first cavity 13 of the first profile is circular with a diameter of 17mm, and the wall thickness of the first profile is 1.2mm.

[0043] By using appropriate dimensions and materials, the weight and material cost of the profiles are significantly reduced while ensuring sufficient yield strength, meeting the requirements of lightweight design and facilitating bending processing.

[0044] The first profile is made of zinc-aluminum-magnesium alloy to increase its minimum yield strength. The first profile can also be made of other alloy materials.

[0045] The first outer plate 11a, the first inner plate 11b, the first transition plate 11c, the second outer plate 12a, the second inner plate 12b, and the second transition plate 12c enclose to form a second cavity 16; the second cavity 16 further reduces the weight of the profile and improves its rigidity; the width of the transition plate is adjustable, so that the structure achieves an optimal balance between strength and weight, and adapts to different application scenarios.

[0046] The frame also includes a base plate 20, one end face of the second profile 10b is in contact with the side of the first profile 10a, and vertical mounting holes are provided on the second profile 10b; the base plate 20 is located below the first profile 10a and the second profile 10b, and threaded holes are provided on the surface of the base plate 20. like Figures 8 to 16 As shown, the profile connector includes a connecting structure, which includes a base plate 31, a first plate 32, a first nut 33, and a horizontal plate 38. The base plate 31 has at least one first through hole 311. The first plate 32 is located in the connecting groove 15 on one side of the first profile 10a. The first plate 32 is connected to the base plate 31. The plate surface of the first plate 32 is opposite to the plate surface of the base plate 31 and is arranged at intervals. The first plate 32 has a first connecting hole. The first nut 33 is riveted to the first connecting hole. The screw hole of the first nut 33 is arranged corresponding to a first through hole 311 on the base plate 31. The horizontal plate 38 is connected to one side of the base plate 31. The plate surface of the horizontal plate 38 is arranged at an angle to the plate surface of the base plate 31. The horizontal plate 38 has at least one second through hole 381. The horizontal plate 38 is in contact with the top surface of the second profile 10b. The first screw 41 passes through a first through hole 311 on the substrate 31 and is connected to the first nut 33 on the first plate 32 to lock the connection groove between the substrate 31 and the first profile 10a; the third screw 43 passes through the second through hole 381 on the horizontal plate 38 and the mounting hole of the second profile 10b and is threadedly connected to the base plate 20.

[0047] The first screw 41 passes through the first through hole on the base plate 31 and connects to the first nut on the first connecting plate, locking the base plate 31 into the connecting groove of the first profile 10a. This eliminates the need for additional holes in the first profile 10a, avoiding a decrease in the strength of the first profile 10a. Furthermore, the anti-loosening properties of the connecting groove and the press-fit nut ensure the long-term reliability of the frame under vibration.

[0048] While locking the base plate 31 to the connecting groove 15 of the first profile 10a, the third screw passes through the second through hole 381 on the horizontal plate 38 and the mounting hole of the second profile 10b to the base plate 20 for threaded connection, thereby realizing the quick fixation of the second profile 10b and the first profile 10a on the base plate 20. The assembly is simple and can realize automated installation.

[0049] The connecting structure also includes a second plate 34 and a second nut 35. The second plate 34 is connected to the base plate 31. The plate surface of the second plate 34 is opposite to the plate surface of the base plate 31 and is arranged at intervals. A second connecting hole is opened on the second plate 34. The second plate 34 and the first plate 32 are both located on the same side of the base plate 31. The second nut 35 is riveted to the second connecting hole. The screw hole of the second nut 35 is arranged corresponding to another first through hole 311 on the base plate 31.

[0050] The second screw 42 passes through another first through hole 311 on the substrate 31 and connects to the second nut 35 on the second plate 34 to lock the connection groove between the substrate 31 and the first profile 10a.

[0051] By setting two independent connecting plates and corresponding rivet nuts on the same side of the substrate 31, it can be connected to two profiles in different directions or two different slots of the same profile at the same time, which enhances the connection strength between the connecting structure and the profile.

[0052] The base plate is locked from the same side of the first profile connecting groove through two connection points, which significantly improves the connection strength and torsional resistance between the connecting structure and the first profile, prevents the base plate from deflecting or loosening during use, and is suitable for frames under heavy loads or vibration conditions.

[0053] The horizontal plate 38 provides a connection interface in another direction, enabling the connection structure to be fixed in the vertical direction or connected to other components at the same time, expanding the function of the connection structure and making it suitable for the assembly of complex structures such as racks.

[0054] The first plate 32 is connected to the base plate 31 by the upper bending plate 36. The width of the first plate 32 is greater than the width of the groove 15 of the first profile, and the width of the upper bending plate 36 is less than the width of the groove 15 of the first profile. The second plate 34 is connected to the base plate 31 by a lower bending plate 37. The width of the second plate 34 is greater than the width of the groove 15 of the first profile, and the width of the lower bending plate 37 is less than the width of the groove 15 of the first profile.

[0055] It should be noted that the width of the upper bending plate 36 is smaller than the width of the connecting groove 15 of the first profile 10a, so that the first plate 32 can be placed in the connecting groove 15 along the length direction of the first profile. The width of the first plate 32 is larger than the width of the connecting groove of the profile, so that the first plate 32 and the base plate 31 can clamp the groove wall of the connecting groove 15 of the first profile. This facilitates installation and adjustment, reduces material usage, lightens the structural weight, and is beneficial to the realization of the stamping process.

[0056] The substrate 31 has an upper notch 313, and the substrate 31 is punched and bent to form a first plate 32, an upper bent plate 36 and an upper notch 313; or, the substrate 31 has a lower notch 314, and the substrate 31 is punched and bent to form a second plate 34, a lower bent plate 37 and a lower notch 314.

[0057] The integrated punching and bending forming process eliminates the need for welding or additional parts, simplifying the manufacturing process and reducing production costs. At the same time, it ensures the relative positional accuracy of the connecting plate and the base plate 31, improving the consistency and reliability of the product.

[0058] The horizontal plate 38 and the first plate 32 are both located on the same side of the substrate 31, and the horizontal plate 38 is located between the first plate 32 and the second plate 34.

[0059] The horizontal plate 38 is located between the two connecting plates, with a compact layout that avoids interference. This facilitates multi-directional connections within a limited space, improving the integration of the connection structure and the utilization of space.

[0060] The substrate 31 is bent to form a horizontal plate 38, with the surface of the substrate 31 perpendicular to the surface of the horizontal plate 38. Two second through holes 381 are spaced apart on the horizontal plate 38, and a third through hole 312 on the substrate 31 and the two second through holes 381 on the horizontal plate 38 form a triangular arrangement. The triangular structure has the highest geometric stability, allowing the connecting structure to form a stable three-point support on the base plate, effectively resisting torques in all directions and preventing the frame from tilting or deforming. It is particularly suitable for conveyor line frames with high flatness requirements.

[0061] The substrate 31 and the horizontal plate 38 are bent perpendicularly to ensure the directional accuracy of the connection; the triangular through-hole layout forms a stable stress structure, which improves the torsional and tensile resistance of the connection node and enhances the overall stability of the connection.

[0062] The two connecting structures are arranged in a mirror-symmetric manner, and the base plates 31 of the two connecting structures are connected side by side. The first plate 32 of one connecting structure is located in the connecting groove on one side of the first profile 10a, and the first plate 32 of the other connecting structure is located in the connecting groove on the other side of the first profile 10a.

[0063] The frame also includes a third profile 10c, and two horizontal plates 38 are respectively attached to the top surfaces of the second profile 10b and the third profile; A third screw 43 passes through the second through hole 381 on the horizontal plate 38 and the mounting hole of the second profile 10b to be threadedly connected to the base plate 20. Another third screw 43 passes through the second through hole 381 on the horizontal plate 38 and the mounting hole of the third profile 10c to be threadedly connected to the surface of the base plate 20.

[0064] The two connecting structures are locked from the connecting grooves on both sides of the first profile 10a. This double-sided clamping structure can balance the force, greatly improving the frame's resistance to lateral forces and torsion, and is especially suitable for applications subject to complex loads.

[0065] By using the horizontal plates on two connecting structures to abut the top surfaces of the second profile 10b and the third profile 10c respectively, and simultaneously fixing both to the base plate 20 via a third screw, a three-dimensional connection is achieved between the first profile 10a, the second profile 10b, the third profile 10c and the base plate 20. This structure gives the frame high rigidity and stability in both horizontal and vertical directions, making it suitable for constructing frame-type conveyor lines or workbenches.

[0066] The third profile 10c may have the same or different construction as the first profile 10a.

[0067] The two connecting substrates 31 are formed by bending a single plate, and the included angle between the surfaces of the two connecting substrates 31 is 30° to 120°. Specifically, it can be 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, or 120°.

[0068] The integrated bending process ensures the positional accuracy and strength of the two connecting structures; the wide adjustable angle range can adapt to the frame connection requirements of different angles (such as diagonal braces and non-right-angle frames), improving the versatility and applicability of the connectors. It enables rapid fixing via profile connectors and the base plate 20.

[0069] A third through hole 312 is provided on the substrate 31, and threaded holes are provided on both sides of the bottom plate 20. The threaded holes on both sides of the bottom plate 20 correspond to the two third through holes 312. The frame also includes two fourth screws 44. One fourth screw 44 passes through a third through hole 312 on a substrate 31 and is connected to a threaded hole on one side of the base plate 20. The other fourth screw 44 passes through a third through hole 312 on another substrate 31 and is connected to a threaded hole on the other side of the base plate 20.

[0070] A third through hole is made on the base plate 31, and the connecting structure is directly fixed to the threaded holes on the adjacent sides of the base plate using the fourth screw 44, forming a secondary reinforcement. This structure not only presses the second profile with the cross plate 38, but also improves the vibration resistance and positional accuracy of the entire frame through the direct connection between the base plate 31 and the base plate 20, preventing the connection from loosening after long-term use.

[0071] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A rack comprising: The first profile includes three or more profile units, which are arranged rotationally symmetrically, and a connecting groove is formed between two adjacent profile units; The second profile is arranged adjacent to the first profile, and mounting holes are provided on the second profile; A profile connector that connects the connecting groove of the first profile to the mounting hole of the second profile.

2. The rack of claim 1, wherein, The profile unit includes: The first outer panel has two opposing side panels; The first inner plate extends inward from one side edge of the first outer plate; A first support plate is formed by extending from the edge of the first inner plate in a direction away from the first outer plate; The first connecting plate is connected to the edge of the first supporting plate; The second outer panel extends from the other side of the first outer panel and is arranged at an angle to the surface of the first outer panel. The second inner panel extends inward from one side edge of the second outer panel; The second support plate extends from the edge of the second inner plate in a direction away from the second outer plate, and the second support plate is close to or in contact with the plate surface of the first support plate. The second connecting plate has one side edge connected to the edge of the second supporting plate, and the other side edge of the second connecting plate extends away from the first connecting plate. The first connecting plate of a profile unit and the second connecting plate of another adjacent profile unit are interconnected to form a whole, and the first connecting plates and second connecting plates of three or more profile units are enclosed to form a first cavity.

3. The rack of claim 2, wherein, Also includes: A first transition plate is located between the first inner plate and the first support plate, and the two side edges of the first transition plate are respectively connected to the first inner plate and the first support plate. The second transition plate is located between the second inner plate and the second support plate, and the two side edges of the second transition plate are connected to the second inner plate and the second support plate, respectively.

4. The rack of claim 2, wherein, The profile unit consists of four sections. The outer contour of the first profile section formed by the four profile units is square, and a connecting groove is formed between two adjacent profile units.

5. The rack of claim 2 or 3 or 4, wherein, The profile unit is constructed by bending sheet metal. The first connecting plate of one profile unit and the second connecting plate of another adjacent profile unit are welded together to form a weld. The first connecting plate and the second connecting plate of the remaining adjacent profile units are integral structures formed by bending sheet metal.

6. The rack of claim 3, wherein, The first outer plate, the first inner plate, the first transition plate, the second outer plate, the second inner plate, and the second transition plate enclose and form a second cavity.

7. The rack of claim 1, wherein, The frame also includes a base plate, which is located below the first profile and the second profile, and the base plate has threaded holes on its surface; The profile connector includes a connecting structure, the connecting structure comprising: A substrate having at least one first through hole thereon; The first plate is located in the connecting groove on one side of the first profile. The first plate is connected to the substrate. The plate surface of the first plate is opposite to the plate surface of the substrate and is arranged at intervals. The first plate has a first connecting hole. The first nut is press-fitted to the first connecting hole, and the screw hole of the first nut is arranged corresponding to a first through hole on the substrate; A horizontal plate is connected to one side edge of a substrate. The surface of the horizontal plate is arranged at an angle to the surface of the substrate. At least one second through hole is opened on the horizontal plate. The horizontal plate is in contact with the top surface of the second profile. A first screw passes through a first through hole on the substrate and is connected to a first nut on the first plate to lock the connection groove between the substrate and the first profile. The third screw passes through the second through hole on the horizontal plate and the mounting hole of the second profile, and is threadedly connected to the base plate.

8. The rack of claim 7, wherein, The connection structure further includes: The second plate is connected to the substrate. The surface of the second plate is opposite to the surface of the substrate and is spaced apart. A second connecting hole is formed on the second plate. The second plate and the first plate are both located on the same side of the substrate. The second nut is press-fitted to the second connecting hole, and the screw hole of the second nut is arranged corresponding to another first through hole on the substrate; The second screw passes through another first through hole on the substrate and is connected to the second nut on the second plate to lock the connection groove between the substrate and the first profile.

9. The rack of claim 8, wherein, The first plate is connected to the substrate by an upper bending plate. The width of the first plate is greater than the width of the connecting groove of the first profile, and the width of the upper bending plate is less than the width of the connecting groove of the first profile. The second plate is connected to the base plate via a lower bending plate. The width of the second plate is greater than the width of the connecting groove of the first profile, and the width of the lower bending plate is less than the width of the connecting groove of the first profile.

10. The rack of claim 9, wherein, The two connecting structures are arranged in a mirror symmetrical manner, the substrates of the two connecting structures are connected on the sides, the substrates of the two connecting structures are formed by bending a single plate, and the surfaces of the substrates of the two connecting structures are arranged at an angle. The first plate of one connecting structure is located in the connecting groove on one side of the first profile, and the first plate of the other connecting structure is located in the connecting groove on the other side of the first profile. The frame also includes a third profile, with two horizontal plates that are respectively attached to the top surfaces of the second and third profiles; another third screw passes through the second through hole on the horizontal plate, the mounting hole of the third profile, and connects to the threaded hole on the bottom plate.

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