Combined frame structure

Abstract

A combined frame structure comprises vertical pipes, transverse pipes, longitudinal pipes, double-end screws and nuts. A transverse through hole and a longitudinal through hole are formed in the vertical pipe; the double-end screws comprise a transverse double-end screw and a longitudinal double-end screw, and the nuts comprise a transverse nut and a longitudinal nut; a longitudinal double-end screw is arranged in the longitudinal through hole in a penetrating mode, and a transversely-through receding hole is further formed in the longitudinal double-end screw. Two ends of the longitudinal double-end screw respectively extend out of the longitudinal through hole and are screwed to the end part of the longitudinal pipe or the longitudinal nut; a transverse double-end screw is arranged in the transverse through hole in a penetrating manner, and the transverse double-end screw simultaneously penetrates through the abdicating hole of the longitudinal double-end screw; two ends of the transverse double-end screw respectively extend out of the transverse through hole and are screwed to the end part of the transverse pipe or the transverse nut; the transverse pipes and the longitudinal pipes are transversely and longitudinally distributed and detachably connected between the vertical pipes so as to define a frame structure. Therefore, infinite expansion and extension in the horizontal direction can be realized, and the stability of the frame structure is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of frame structures, and in particular to a composite frame structure. Background Technology

[0002] Frame structures can often be combined with partitions to form shelves, greenhouses, plant stands, storage cabinets, and so on. Taking shelves as an example, shelves are a common type of storage rack widely used in supermarkets, warehouses, express delivery points, and other places for storing goods.

[0003] For example, the combined frame structure disclosed in Chinese patent CN201630613U includes several upright frames, several horizontal rods, several bidirectional screws, and several fixing screws. The upright frames are composed of longitudinal columns and several horizontal columns, and can be extended and expanded. However, in this design, horizontal extension is limited to the left and right lateral directions, and cannot be extended in the front and back longitudinal directions. Utility Model Content

[0004] The purpose of this utility model is to provide a combined frame structure that has the advantages of being infinitely expandable in both the horizontal and vertical directions and having a stable structure.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A composite frame structure includes risers, horizontal pipes, vertical pipes, double-ended bolts, and nuts;

[0007] The riser is provided with a horizontal through hole and a vertical through hole, and the axes of the horizontal through hole and the vertical through hole are located on the same plane;

[0008] The double-ended screw includes a horizontal double-ended screw and a vertical double-ended screw, and the nut includes a horizontal nut and a vertical nut;

[0009] The longitudinal double-ended screw is inserted into the longitudinal through hole, and the longitudinal double-ended screw is also provided with a transverse through clearance hole; the two ends of the longitudinal double-ended screw extend out of the longitudinal through hole respectively, for screwing to the end of the longitudinal tube or the longitudinal nut.

[0010] The transverse double-ended screw is inserted into the transverse through hole, and the transverse double-ended screw also passes through the clearance hole of the longitudinal double-ended screw; the two ends of the transverse double-ended screw extend out of the transverse through hole respectively, for screwing to the end of the transverse tube or the transverse nut.

[0011] The risers consist of at least four pipes, and the horizontal and vertical pipes consist of at least two pipes each. The horizontal and vertical pipes are distributed horizontally and vertically and can be detachably connected between the risers to form a frame structure.

[0012] Furthermore, the longitudinal double-headed screw peripheral wall has at least one positioning plane; the longitudinal through hole sidewall is provided with a limiting plane corresponding to the positioning plane.

[0013] Furthermore, the clearance hole is located on the positioning plane.

[0014] Furthermore, the longitudinal double-ended screws on each of the vertical pipes on one side of the frame structure are replaced with single-ended screws, which also have clearance holes.

[0015] Furthermore, the ends of the horizontal and vertical tubes are provided with internal threaded inserts, sunflower inserts, or expansion nut inserts to be screwed and fixed with the corresponding horizontal double-ended screws or vertical double-ended screws.

[0016] Furthermore, the sunflower insert includes a central post and guide flanges and two sunflower pieces distributed sequentially along the axial direction of the central post; the central post has a threaded connection hole for threaded engagement with a double-ended screw; the two ends of the central post are a guide flange and a sunflower piece, respectively, the outer periphery of the guide flange is raised like the outer periphery of the sunflower piece, and the outer diameter of the guide flange is larger than the inner diameter of the corresponding horizontal or vertical tube and forms a stop ring.

[0017] Furthermore, the expansion nut insert includes an inner expansion sleeve and a movable cone; the inner expansion sleeve has a conical cavity inside, the movable cone is installed in the conical cavity, and the end of the inner expansion sleeve near the outer side of the corresponding horizontal or vertical pipe has an expansion sleeve hole communicating with the conical cavity; the end of the double-ended screw is used to pass through the expansion sleeve hole and can drive the movable cone to move laterally in the conical cavity to open the inner expansion sleeve, so that the inner expansion sleeve is interference-fitted with the inner wall of the horizontal or vertical pipe.

[0018] Furthermore, the expansion nut insert includes an inner expansion sleeve; the inner expansion sleeve has a conical cavity inside, and the end of the inner expansion sleeve near the outer side of the corresponding horizontal or vertical pipe has an expansion sleeve hole communicating with the conical cavity, and the expansion sleeve hole is provided with internal threads; the end of the double-ended screw is used to screw into the expansion sleeve hole and can move laterally in the conical cavity to open the inner expansion sleeve, so that the inner expansion sleeve is interference-fitted with the inner wall of the horizontal or vertical pipe.

[0019] Furthermore, the riser is a hollow circular or rectangular tube; the horizontal tube is a hollow circular or rectangular tube; and the vertical tube is a hollow circular or rectangular tube.

[0020] Furthermore, the riser is a hollow pipe with a butt joint at the bottom, which can be inserted and fixed to the top opening of another riser; and the butt joint of the upper riser has an inner transverse through hole and an inner longitudinal through hole located on the transverse and longitudinal through holes of the lower riser.

[0021] Furthermore, support partitions are provided between adjacent horizontal tubes or between adjacent vertical tubes to form a shelving structure.

[0022] Furthermore, the four corners of the supporting partition are mounted on the shelf supports installed between the longitudinal tube and the adjacent transverse tube; an intermediate support plate is also installed in the middle of the longitudinally adjacent transverse tube, and the intermediate support plate is supported below the supporting partition; the transverse tube and the longitudinal tube are respectively provided with recessed grooves corresponding to the shelf supports and the intermediate support plate, and the two ends of the shelf supports and the intermediate support plate are fitted and fastened in the recessed grooves.

[0023] Furthermore, the outer periphery of the frame structure is provided with multiple outer baffles and at least one door panel to form a storage cabinet structure; a fixing sleeve is provided between the upright tube, the horizontal tube, and the longitudinal tube; the fixing sleeve has a through hole in the middle with both ends, through which a double-ended screw passes, and a positioning block protrudes from the side of the fixing sleeve near the upright tube; screw holes or pre-embedded protruding screws are provided at four equally spaced positions on the outer periphery of the fixing sleeve; the upright tube is provided with corresponding positioning holes for the positioning blocks to be inserted, and it is ensured that the screw holes or screws of the fixing sleeve at the horizontal tube are located in the up-down and front-back directions, while the fixing sleeves at the longitudinal tube are located in the up-down and left-right directions; the supporting partition and the outer baffle are respectively locked to each fixing sleeve; the door panel is hinged to the front side of the frame structure.

[0024] Furthermore, the risers, horizontal pipes, and longitudinal pipes are all circular pipes; the support partition has recessed areas around it to form arc-shaped fastening parts; the support partition can be arbitrarily clamped and assembled and enclosed in the cavity formed by the risers, horizontal pipes, and longitudinal pipes on the front, back, top, bottom, left, and right sides of the frame structure.

[0025] Furthermore, side panel assemblies are installed between vertically adjacent horizontal tubes and vertically adjacent vertical tubes to form a storage cabinet structure. The side panel assembly includes an upper clamping strip, a lower clamping strip, and a side panel. The upper clamping strip is used to connect and fix to the bottom surface of the upper horizontal tube or vertical tube, while the lower clamping strip is used to connect and fix to the top surface of the lower horizontal tube or vertical tube. The sides of the upper and lower clamping strips are also recessed with slots for the upper and lower edges of the side panel to be engaged.

[0026] After adopting the above technical solution, since the riser can be fitted with two double-headed screws, the horizontal double-headed screws ensure the connection and fixation of the horizontally extended pipes, while the vertical double-headed screws ensure the connection and fixation of the vertically extended pipes. With the corresponding riser, the frame structure of this utility model can be infinitely extended in the horizontal and vertical directions, and the extension and combination methods are richer and more free, and can be extended and combined at will.

[0027] Furthermore, the horizontal double-ended screws in the same riser pass through the clearance holes of the vertical double-ended screws, forming a cross shape. This allows the horizontal and vertical pipes connected to the riser to be firmly screwed and locked together as one unit, and ensures that the horizontal and vertical pipes are on the same plane. This facilitates the installation and setting of support partitions and outer baffles, and can be easily combined with the frame structure to form products such as shelves, storage cabinets, and greenhouse flower racks.

[0028] Furthermore, the bottom of the riser can be fitted with a constriction or other means to allow the risers to be stacked vertically, thus enabling the frame structure of this utility model to be extended vertically and horizontally. This allows for unlimited extension along three axes, and the structure is stable and not easily disintegrated. Attached Figure Description

[0029] Figure 1 This is a perspective view of Embodiment 1 of the present utility model;

[0030] Figure 2 This is a partial structural exploded view of Embodiment 1 of the present invention;

[0031] Figure 3 This is a schematic diagram of the extended state of Embodiment 1 of this utility model;

[0032] Figure 4 This is a partial structural exploded view of Embodiment 2 of the present invention;

[0033] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0034] Figure 6 This is a partial exploded view of Embodiment 3 of the present invention;

[0035] Figure 7 This is a partial structural exploded view of Embodiment 4 of the present invention;

[0036] Figure 8 This is a partial structural cross-sectional view of Embodiment 4 of the present invention;

[0037] Figure 9 This is a partial exploded view of Embodiment 5 of the present invention;

[0038] Figure 10 This is a partial structural cross-sectional view of Embodiment 5 of the present invention;

[0039] Figure 11 This is a partial exploded view of Embodiment 6 of the present invention;

[0040] Figure 12 This is a partial cross-sectional view of Embodiment 6 of the present invention;

[0041] Figure 13 This is a schematic diagram of the overall structure of Embodiment 7 of this utility model;

[0042] Figure 14 This is a schematic diagram of the overall structure of Embodiment 8 of the present invention;

[0043] Figure 15 This is a schematic diagram of the overall structure of Embodiment 9 of this utility model;

[0044] Figure 16 This is a schematic diagram of the overall structure of Embodiment 10 of this utility model;

[0045] Figure 17 This is a schematic diagram of the stacked components of Embodiment 11 of this utility model;

[0046] Figure 18 This is a schematic diagram of the storage cabinet according to Embodiment 12 of this utility model;

[0047] Figure 19 This is a partial structural exploded view of Embodiment 12 of the present invention;

[0048] Figure 20 This is a schematic diagram of another structure of the fixing sleeve in Embodiment 12 of this utility model;

[0049] Figure 21 This is a schematic diagram of the overall structure of Embodiment 13 of this utility model;

[0050] Figure 22 This is a schematic diagram of the overall structure of Embodiment 14 of this utility model.

[0051] Labeling explanation: Frame structure 10, Shelf structure 20, Locker structure 30;

[0052] Riser 1, Horizontal through hole 11, Vertical through hole 12, Limiting plane 121, Butt joint constriction 13, Protrusion 131, Inner horizontal through hole 132, Inner vertical through hole 133, Positioning hole 14, Horizontal pipe 2, Vertical pipe 3, Double-ended screw 4, Horizontal double-ended screw 41, Vertical double-ended screw 42, Clearance hole 421, Positioning plane 422, Single-ended screw 423, Nut 5, Horizontal nut 51, Vertical nut 52, Inner thread 61, Sunflower insert 62, Expansion nut insert 63, Duckbill washer 64, Sunflower insert 62, Center post 621, Sunflower piece 622, Threaded connection hole 623, Guide flange 624, Expansion nut insert 63, Inner expansion sleeve 631, Movable cone 632, Conical cavity 633. Expansion sleeve hole 634, expansion body 635, partition gap 636, conical screw hole 637, limiting rib 638, abutting flange 639, abutting wing 640, supporting partition 7, arc-shaped clamping part 71, arc-shaped hook 72, clamping notch 73, partition through hole 74, arc-shaped fastening part 75, shelf support 81, middle support plate 82, groove 83, fastening part 84, outer baffle 91, left baffle 911, right baffle 912, rear baffle 913, door panel 92, fixing sleeve 93, fixing sleeve through hole 931, positioning block 932, screw 933, nut 934, screw hole 935, screw 936, fixing plate 94, side plate assembly 95, upper clamping strip 951, lower clamping strip 952, side plate 953, slot 954. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0054] Example 1

[0055] like Figures 1 to 3 As shown, this embodiment provides a combined frame structure 10, including a vertical pipe 1, a horizontal pipe 2, a longitudinal pipe 3, a double-ended screw 4, and a nut 5.

[0056] The riser 1 is provided with a transverse through hole 11 and a longitudinal through hole 12, and the axes of the transverse through hole 11 and the longitudinal through hole 12 are located on the same plane.

[0057] The double-ended screw 4 includes a horizontal double-ended screw 41 and a vertical double-ended screw 42, and the nut 5 includes a horizontal nut 51 and a vertical nut 52;

[0058] The longitudinal double-ended screw 42 is inserted into the longitudinal through hole 12. The longitudinal double-ended screw 42 is also provided with a transverse through clearance hole 421. The two ends of the longitudinal double-ended screw 42 extend out of the longitudinal through hole 12 respectively, and are used to screw onto the end of the longitudinal tube 3 or the longitudinal nut 52.

[0059] The transverse double-ended screw 41 is inserted into the transverse through hole 11, and the transverse double-ended screw 41 also passes through the relief hole 421 of the longitudinal double-ended screw 42; the two ends of the transverse double-ended screw 41 extend out of the transverse through hole 11 respectively, and are used to screw onto the end of the transverse tube 2 or the transverse nut 51.

[0060] The riser 1 consists of at least four pipes, and the horizontal pipes 2 and vertical pipes 3 consist of at least two pipes each. The horizontal pipes 2 and vertical pipes 3 are distributed horizontally and vertically and can be detachably connected between each riser 1 to form a frame structure 10.

[0061] See Figure 3 Since the riser 1 can be fitted with two double-headed screws 4, the horizontal double-headed screw 41 ensures the connection and fixation of the horizontally extended horizontal pipe 2, while the vertical double-headed screw 42 ensures the connection and fixation of the vertically extended vertical pipe 3. With the corresponding riser 1, the frame structure 10 of this utility model can be infinitely extended in the horizontal and vertical directions, and the extension combination is richer and more free, and can be extended and combined at will.

[0062] Furthermore, the horizontal double-headed screw 41 inside the same vertical pipe 1 passes through the clearance hole 421 of the vertical double-headed screw 42, and the two form a cross shape, which can firmly screw and lock the horizontal pipe 2 and the vertical pipe 3 connected to the vertical pipe 1 into one, and can ensure that the horizontal pipe 2 and the vertical pipe 3 are on the same plane. This facilitates the installation and setting of support partitions and outer baffles, and can be easily combined with the frame structure 10 to form products such as shelves, storage cabinets, greenhouse flower racks, etc.

[0063] like Figure 2 The longitudinal double-ended screw 42 has at least one positioning plane 422 on its peripheral wall; the longitudinal through hole 12 has a limiting plane 121 corresponding to the positioning plane 422 on its side wall. The clearance hole 421 may be provided on the positioning plane 422.

[0064] By setting the positioning plane 422 and the limiting plane 121 to be opposite each other, the longitudinal double-ended screw 42 can be inserted into the longitudinal through hole 12 without rotation, so as to position the relief hole 421. This allows the transverse double-ended screw 41 to pass through the relief hole 421 accurately and quickly during assembly, thereby improving installation efficiency, enhancing user assembly efficiency, saving user assembly time and reducing assembly difficulty.

[0065] The ends of the horizontal tube 2 and the vertical tube 3 may be provided with inner thread 61, sunflower insert or expansion nut insert, so as to be screwed and fixed with the horizontal double-ended screw 41 or the vertical double-ended screw 42 of the double-ended screw 4.

[0066] like Figure 2 As shown in this embodiment, the inner sleeve 61 is welded to the ends of the horizontal tube 2 and the vertical tube 3 as an example. The horizontal tube 2 and the vertical tube 3 are hollow round tubes, and the vertical tube 1 is a hollow rectangular tube. After the inner sleeve 61 is pre-welded, it can be easily locked and fixed with each double-ended screw 4.

[0067] Example 2

[0068] like Figure 4 and Figure 5 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that the ends of the horizontal tube 2 and the vertical tube 3 are equipped with sunflower inserts 62 as an example.

[0069] The sunflower insert 62 includes a central post 621 and sunflower pieces 622 fixed at both ends of the central post 621; the central post 621 has a threaded connection hole 623 for threaded engagement with the double-ended screw 4; the outer periphery of the sunflower piece 622 is raised and is used for interference fit with the inner wall of the horizontal tube 2 or the vertical tube 3.

[0070] During assembly, the sunflower insert 62 can be hammered into the openings at both ends of the horizontal tube 2 or the vertical tube 3 using tools such as a hammer. This causes the periphery of the sunflower piece 622 to be compressed and expand outward, thus clamping it tightly against the inner wall of the horizontal tube 2 or the vertical tube 3 to form a tight fit. The threaded connection hole 623 in the central column 621 can be screwed into the double-ended screw 4 to fix the horizontal tube 2 or the vertical tube 3 to the vertical tube 1. The installation operation is convenient and quick. The sunflower insert 62 has low cost, low production cost, and good fixing effect.

[0071] Meanwhile, the longitudinal double-headed screws 42 on each of the vertical pipes 1 on one side of the frame structure 10 in this embodiment can be replaced with single-headed screws 423, which are also provided with clearance holes 421.

[0072] Specifically, in this embodiment, the longitudinal double-ended screws 42 on the two vertical pipes 1 on the front longitudinal side of the frame structure 10 are single-ended screws 423, while the longitudinal double-ended screws 42 on the two vertical pipes 1 on the rear side are still double-ended screws. Therefore, during assembly, the vertical pipes 3 can be assembled from front to back. Setting the front side to single-ended screws 423 allows for quick assembly and positioning of the first vertical pipe 1 and the vertical pipe 3. However, since the longitudinal double-ended screws 42 (single-ended screws 423) have a positioning plane 422, they cannot rotate within the longitudinal through hole 12. Therefore, the screws inserted into the longitudinal through hole 12 on the rear vertical pipe 1 must be double-ended screws 4 to ensure an effective rotatable connection between the subsequent vertical pipe 3 and the last vertical pipe 1. Example 3

[0073] like Figure 6 As shown, the structure of this embodiment is basically the same as that of the above embodiments, the main difference being that the structure of the sunflower insert 62 in this embodiment is different.

[0074] The sunflower insert 62 includes a central post 621 and guide flanges 624 and two sunflower pieces 622 arranged sequentially along the axial direction of the central post 621. The central post 621 has a threaded connection hole 623 for threaded engagement with the double-ended screw 4. The two ends of the central post 621 are a guide flange 624 and a sunflower piece 622, respectively. The outer periphery of the guide flange 624 is raised in the same way as the outer periphery of the sunflower piece 622, that is, the guide flange 624 can be inverted conical. The outer diameter of the guide flange 624 is slightly larger than the inner diameter of the corresponding horizontal tube 2 or vertical tube 3 and forms a stop ring 625.

[0075] Therefore, when the sunflower insert 62 of this embodiment is installed into the horizontal tube 2 or the vertical tube 3, the inverted conical guide flange 624 can be used for guidance, ensuring good coaxiality between the sunflower insert 62 and the horizontal tube 2 or the vertical tube 3, and preventing the sunflower insert 62 from shifting during installation. This ensures that the horizontal tubes 2 or the vertical tubes 3 will not tilt when the frame structure 10 expands in the horizontal direction, achieving the purpose of unlimited expansion.

[0076] Furthermore, the stop ring 625 of the guide flange 624 can be limited to the open end face of the horizontal tube 2 or the vertical tube 3 to prevent the sunflower insert 62 from moving inward and to ensure the connection effect with the double-ended screw 4.

[0077] The longitudinal double-ended screw 42 of this embodiment may have two positioning planes 422, and the corresponding longitudinal through hole 12 may have two limiting planes 121.

[0078] Example 4

[0079] like Figure 7 and Figure 8 As shown in the figure, in this embodiment, the expansion nut insert 63 is installed in the end of the horizontal tube 2 and the vertical tube 3 as an example.

[0080] The expansion nut insert 63 includes an inner expansion sleeve 631 and a movable cone 632. The inner expansion sleeve 631 has a conical cavity 633 inside, and the movable cone 632 is installed in the conical cavity 633. The end of the inner expansion sleeve 631 near the outside of the horizontal tube 2 or the vertical tube 3 has an expansion sleeve hole 634 that communicates with the conical cavity 633. The figure shows the horizontal tube 2 as an example. The end of the double-ended screw 4 is used to pass through the expansion sleeve hole 634 and can drive the movable cone 632 to move laterally in the conical cavity 633 to open the inner expansion sleeve 631, so that the inner expansion sleeve 631 is interference-fitted with the inner wall of the horizontal tube 2.

[0081] Therefore, during assembly, the expansion nut insert 63 can be inserted into the end of the horizontal tube 2 or the vertical tube 3, and then cooperated with the double-ended screw 4 to expand and open the expansion nut insert 63 to press against the inner wall of the horizontal tube 2 or the vertical tube 3, thereby achieving an interference fit fixation. This facilitates the fixation of the horizontal tube 2 or the vertical tube 3 to the vertical tube 1 and ensures the coaxiality of each horizontal tube 2 or vertical tube 3.

[0082] Meanwhile, the use of expansion nut inserts 63 allows for fine adjustment of the center hole position of the expansion connector 3 inside the pipe and the double-ended screw 4. Thus, when the horizontal pipes 2 or vertical pipes 3 on both sides of the riser 1 are connected to the same double-ended screw 4, the coaxiality can be maintained by the expansion connector 3 inside the pipe. This ensures that when the frame structure 10 is extended horizontally and vertically, the horizontal pipes 2 connected by each horizontal line do not become skewed, and the vertical pipes 3 connected by each vertical line do not become skewed, thus meeting the unlimited expansion requirements of the frame structure 10.

[0083] Specifically, in this embodiment, the inner side of the tube expansion sleeve 631 near the horizontal tube 2 or the vertical tube 3 is provided with at least two circumferentially spaced expansion bodies 635, and there is a separation gap 636 between adjacent expansion bodies 635. In this embodiment, there are four expansion bodies 635 and four separation gaps 636; the conical cavity 633 is formed between each expansion body 635; the conical cavity 633 is wider inside and narrower outside.

[0084] The movable cone 632 is also wider inside and narrower outside, and has a conical screw hole 637 that extends laterally through both ends in the middle; the movable cone 632 is movably placed in the conical cavity 633 and the outer wall of the movable cone 632 is provided with at least one limiting rib 638. In this embodiment, two symmetrical limiting ribs 638 are set as an example. The limiting ribs 638 slide in the partition gap 636.

[0085] In this way, such as Figure 8When the end of the double-ended screw 4 passes through the expansion sleeve hole 634 and is screwed into the conical screw hole 637, the rotation of the double-ended screw 4 can drive the movable cone 632 to move laterally outward within the conical cavity 633, thus opening the inner expansion sleeve 631. In actual installation, the relative rotation of the double-ended screw 4 can be achieved by rotating the horizontal tube 2 and the inner expansion sleeve 631. The rotation of the double-ended screw 4 will have a tendency to drive the movable cone 632 to rotate. However, since the limiting rib 638 of the movable cone 632 is limited in the partition gap 636, the rotation tendency will be changed into a lateral outward movement. This achieves the compression and expansion of the narrow end of the conical cavity 633, which can also cause the inner ends of each expansion body 635 to separate and open, and press against the inner wall of the horizontal tube 2 to achieve an interference fit.

[0086] In this embodiment, the outer diameter of the inner expansion sleeve 631 before it opens is not greater than the inner diameter of the horizontal tube 2, so as to facilitate insertion into the horizontal tube 2.

[0087] The inner expansion sleeve 631 is also provided with an abutment flange 639 that overlaps the end face of the horizontal tube 2 at the end edge near the outside of the horizontal tube 2; it can be used to limit the movement and prevent the inner expansion sleeve 631 from falling directly into the tube.

[0088] Meanwhile, the inner expansion sleeve 631, located on the outer wall inside the horizontal tube 2, may be provided with an abutment wing 640. The outer end of the abutment wing 640 is raised and can be tightly fitted against the inner wall of the horizontal tube 2. This achieves the pre-positioning of the inner expansion sleeve 631, allowing it to be initially engaged with the inner wall of the horizontal tube 2, preventing it from falling out of the horizontal tube 2, and facilitating subsequent installation and locking.

[0089] In this embodiment, the horizontal tube 2 is a hollow circular tube, but it can also be a rectangular tube, etc.; the shape of the inner expansion sleeve 631 can be circular or rectangular, etc., to fit the inner cavity of the horizontal tube 2.

[0090] Example 5

[0091] like Figures 9 to 10 As shown, similar to the structure of the above embodiment, in this embodiment, the expansion nut insert 63 also includes an inner expansion sleeve 631 and a movable cone 632.

[0092] The inner expansion sleeve 631 also has a conical cavity 633 inside, and the movable cone 632 is installed in the conical cavity 633. The end of the inner expansion sleeve 631 near the outside of the horizontal tube 2 also has an expansion sleeve hole 634 that communicates with the conical cavity 633. The end of the double-headed screw 4 is used to pass through the expansion sleeve hole 634 and can drive the movable cone 632 to move laterally in the conical cavity 633 to open the inner expansion sleeve 631, so that the inner expansion sleeve 631 is interference-fitted with the inner wall of the horizontal tube 2.

[0093] Specifically, in this embodiment, the inner expansion sleeve 631 is provided with at least two circumferentially spaced expansion bodies 635 near the inner side of the horizontal tube 2, and there is a separation gap 636 between adjacent expansion bodies 635. In this embodiment, there are four expansion bodies 635 and four separation gaps 636; the conical cavity 633 is formed between each expansion body 635; the conical cavity 633 is narrow inside and wide outside.

[0094] The movable cone 632 is also narrower inside and wider outside; and the expansion sleeve hole 634 is provided with internal threads. The double-ended screw 4 is screwed into the expansion sleeve hole 634 and its end abuts against the movable cone 632. The rotation of the double-ended screw 4 can drive the movable cone 632 to move laterally inward within the conical cavity 633, thus opening the inner expansion sleeve 631. The lateral inward movement of the movable cone 632 within the conical cavity 633 can achieve the compression and outward expansion of the narrow end of the conical cavity 633, which can also cause the expansion bodies 635 to separate and open, and press against the inner wall of the horizontal tube 2 to achieve an interference fit.

[0095] Example 6

[0096] like Figure 11 and Figure 12 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that the expansion nut insert 63 in this embodiment does not include the movable cone 632.

[0097] The expansion nut insert 63 includes an inner expansion sleeve 631, which has a conical cavity 633 inside. The end of the inner expansion sleeve 631 near the outside of the horizontal tube 2 or the vertical tube 3 has an expansion sleeve hole 634 communicating with the conical cavity 633. The expansion sleeve hole 634 is provided with internal threads. The end of the double-ended screw 4 is used to screw into the expansion sleeve hole 634 and can rotate in the expansion sleeve hole 634 and move laterally in the conical cavity 633, thereby directly opening the inner expansion sleeve 631 so that the inner expansion sleeve 631 is interference-fitted to the inner wall of the horizontal tube 2. Specifically, the conical cavity 633 is wider on the outside and narrower on the inside.

[0098] Therefore, during assembly, the double-ended screw 4 and the horizontal tube 2 or the vertical tube 3 can be easily and quickly screwed together using the expansion nut insert 63.

[0099] Example 7

[0100] like Figure 13 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that a support partition 7 can be provided between the longitudinally adjacent horizontal tubes 2 in this embodiment. The front and rear ends of the support partition 7 can be provided with arc-shaped clamping parts 71 to overlap and fasten to the front and rear horizontal tubes 2. Thus, when consumers install it themselves, they only need to fasten the support partition 7 from top to bottom to complete the assembly operation. The support partition 7, together with the frame structure 10, can form a shelf structure 20, which is convenient for users to place items.

[0101] Of course, the arc-shaped clamping part 71 of the support partition 7 can also be provided at the left and right ends (not shown in the figure) so that it can overlap the horizontally adjacent longitudinal pipe 3.

[0102] Example 8

[0103] like Figure 14 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that the support partition 7 between the longitudinally adjacent horizontal pipes 2 in this embodiment does not have an arc-shaped clamping part 71. The vertical pipe 1, longitudinal pipe 3 and horizontal pipe 2 in this embodiment are all circular pipes.

[0104] Specifically, in this embodiment, the four corners of the supporting partition 7 can be placed on the shelf support 81 installed between the longitudinal tube 3 and the adjacent transverse tube 2 of the side frame 1. Thus, when consumers install it themselves, they only need to place the supporting partition 7 from top to bottom to complete the assembly operation. The supporting partition 7, together with the frame structure 10, can form a shelf structure 20, which is convenient for users to place items. The four corners of the supporting partition 7 are supported by the shelf support 81, ensuring the support performance.

[0105] Furthermore, in this embodiment, intermediate support plates 82 can be installed in the middle of the longitudinally adjacent horizontal tubes 2. One or more can be set. In this embodiment, two intermediate support plates 82 are used as an example to improve the manufacturing effect of the support partition 7 and improve the support performance of the shelf structure 20.

[0106] Of course, the intermediate support plate 82 can also be set up between the horizontally adjacent longitudinal pipes 3 (not shown in the figure).

[0107] In this embodiment, grooves 83 are recessed on the horizontal tube 2 and the vertical tube 3 respectively corresponding to the shelf support 81 and the intermediate support plate 82, so that the two end fasteners 84 of the shelf support 81 and the intermediate support plate 82 can be fitted and fastened in the grooves 83, which can position the shelf support 81 and the intermediate support plate 82, and also make the surface of the horizontal tube 2 and the vertical tube 3 flat, making the appearance cleaner and more beautiful.

[0108] In this embodiment, the riser 1, the longitudinal pipe 3 and the transverse pipe 2 are all circular pipes. Duckbill gaskets 64 can also be provided between the end of the transverse pipe 2 and the riser 1, and between the end of the longitudinal pipe 3 and the riser 1, to increase the contact area and improve the locking and fixing effect.

[0109] Furthermore, the bottom of the riser 1 in this embodiment may have a protruding dot 131 on the docking constriction 13. When the docking constriction 13 can be inserted and fixed into the top opening of another riser 1, the protruding dot 131 can be used to increase the friction and improve the stability of the docking, thereby improving the overall stability of the shelf structure 20.

[0110] Example 9

[0111] like Figure 15 As shown, the structure of this embodiment is basically the same as that of the above embodiments. The main difference is that the supporting partition 7 of the longitudinally adjacent horizontal tubes 2 in this embodiment is a mesh plate.

[0112] The mesh-like support partition 7 can be provided with several arc-shaped hooks 72 around its perimeter. Each arc-shaped hook 72 can be placed on the longitudinal pipe 3 and the transverse pipe 2 to achieve convenient and quick installation and fixing.

[0113] Example 10

[0114] like Figure 16 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that the support partition 7 in this embodiment has snap-fit ​​notches 73 at the four corners. Also, the vertical pipe 1, longitudinal pipe 3 and horizontal pipe 2 in this embodiment are all rectangular pipes for illustration.

[0115] Specifically, the supporting partition 7 can be a rectangular wooden board, and each of the four corners has a snap-fit ​​notch 73. The snap-fit ​​notch 73 makes way for the four vertical pipes 1 so that the supporting partition 7 can be erected on the top of the longitudinal pipe 3 and the transverse pipe 2.

[0116] Example 11

[0117] like Figure 17 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The riser 1 in this embodiment is a hollow pipe. The bottom of the riser 1 has a butt joint 13, which can be inserted and fixed to the top opening of another riser 1. The butt joint 13 of the upper riser 1 has an inner transverse through hole 132 and an inner longitudinal through hole 133 for the transverse through hole 11 and the longitudinal through hole 12 of the lower riser 1.

[0118] Therefore, during assembly, the joint narrowing 13 allows for vertical expansion of the combined frame structure 10, enabling unlimited stacking and height increase. Furthermore, the inner transverse through-hole 132 and inner longitudinal through-hole 133 allow corresponding transverse double-ended screws 41 and longitudinal double-ended screws 42 to pass through and be positioned, respectively, enabling the locking and fixing of the upper and lower risers 1, preventing separation and improving the stability and safety of the overall combined frame structure 10.

[0119] Example 12

[0120] like Figure 18 As shown, the structure of this embodiment is basically the same as that of the above embodiment. In this embodiment, a supporting partition 7 can be provided between the longitudinally adjacent horizontal tubes 2 of the frame structure 10, and multiple outer baffles 91 and at least one door panel 92 can be provided on the outer periphery of the frame structure 10, thereby forming a storage cabinet structure 30.

[0121] This embodiment illustrates a single-door storage cabinet. The outer baffle 91 may include a left baffle 911, a right baffle 912, and a rear baffle 913, and may be detachably connected to the riser 1 of the frame structure 10. The door panel 92 may be a single unit, hinged to the right riser 1. Of course, the specific number and installation method of the outer baffle 91 are not limited to this embodiment, and those skilled in the art can adjust and set them as needed.

[0122] Of course, the frame structure 10 can also be combined with several partitions to form wardrobes, greenhouses, flower racks, etc.

[0123] Specifically, for example Figure 19 and Figure 20 In this embodiment, a fixing sleeve 93 may be provided between the riser 1, the horizontal pipe 2, and the longitudinal pipe 3.

[0124] The outer diameter of the fixing sleeve 93 can be the same as the outer diameter of the horizontal pipe 2 and the vertical pipe 3. The fixing sleeve 93 has a fixing sleeve through hole 931 with both ends through it in the middle. The fixing sleeve through hole 931 allows the double-ended screw 4 to pass through. At least one positioning block 932 protrudes from the side of the fixing sleeve 93 near the vertical pipe 1. At four equally spaced positions on the outer circumference of the fixing sleeve 93, protruding screws 933 can be pre-embedded respectively (see Figure 20 ), or it is equipped with a screw hole 934 (see Figure 21 ).

[0125] The riser 1 is provided with a positioning hole 14 for the positioning block 932 to be inserted. In this embodiment, the positioning hole 14 passes through both sides of the riser 1. The positioning block 932 in this embodiment is a non-circular rectangle, but it is not limited to this. When the fixing sleeve 93 is installed, the positioning block 932 can be inserted into the positioning hole 14 of the riser 1 to realize the positioning of the fixing sleeve 93. This ensures that each screw hole 934 or screw 933 of the fixing sleeve 93 at the horizontal pipe 2 can be located in the up, down, front and back directions of the fixing sleeve 93, while each screw hole 934 or screw 933 of the fixing sleeve 93 at the vertical pipe 3 can be located in the up, down, left and right directions. Then, the double-headed screw 4 passing through the fixing sleeve through hole 931 can be locked with the horizontal pipe 2 or the vertical pipe 3 by relative rotation, and the fixing sleeve 93 is locked between the riser 1 and the horizontal pipe 2 or the vertical pipe 3.

[0126] The four corners of the supporting partition 7 can be provided with partition through holes 74, so that when the supporting partition 7 is placed above the longitudinally adjacent horizontal tube 2, each partition through hole 74 can be used for screws 933 to pass through and be fastened with nuts 934, so as to achieve connection and fixation of the supporting partition 7. Alternatively, each partition through hole 74 can also be used for screws 936 to pass through and be fastened with screw holes 935 to achieve corresponding connection and fixation.

[0127] The left baffle 71 and right baffle 72 of each outer baffle 7 can be locked onto the fixing sleeves 93 on the left and right sides of the vertical pipe 3, respectively. The rear baffle 73 can be locked onto the rear side of the fixing sleeve 93, and the front door panel 8 can be hinged to the fixing plate 94 locked onto the front side of each right fixing sleeve 93. Of course, the fixing plate 94 can also be locked onto the front side of each fixing sleeve 93 on the left front of the frame structure 10.

[0128] Therefore, by setting the fixing sleeve 93, the support partition 7, the outer baffle 91 and the door panel 92 can be easily locked and attached, and modular expansion can be realized. When the outer baffle 91 needs to be installed, the fixing sleeve 93 is installed. When the outer baffle 91 is not needed, the horizontal pipe 2 can be directly connected to the vertical pipe 1.

[0129] Example 13

[0130] like Figure 21 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that the riser 1, horizontal pipe 2 and vertical pipe 3 in this embodiment are all circular pipes, and a support partition 7 can be set between adjacent pipes.

[0131] The support partition 7 has recessed areas around its perimeter forming arc-shaped fastening portions 75. Therefore, the support partition 7 can be arbitrarily assembled and enclosed within the cavities formed by the pipes on the front, back, top, bottom, left, and right sides of the frame structure 10. Taking the cavity on the top side as an example, the front and rear arc-shaped fastening portions 75 of the support partition 7 can be fastened and locked to the rear side of the front horizontal pipe 2 and the front side of the rear horizontal pipe 2, respectively. The left and right arc-shaped fastening portions 75 of the support partition 7 can be fastened and locked to the right side of the left longitudinal pipe 3 and the left side of the rear longitudinal pipe 3, respectively. This allows the support partition 7 to be fastened between the front and rear horizontal pipes 2 and the left and right longitudinal pipes 3, enabling rapid assembly of the support partition 7.

[0132] Similarly, the support partition 7 can be installed on the front, back, left and right sides. The support partition 7 can be used in conjunction with the frame structure 10 to form a shelf structure 20 or a storage cabinet structure, which is convenient for users to place items.

[0133] Example 14

[0134] like Figure 22 As shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that the vertical pipe 1, horizontal pipe 2 and vertical pipe 3 in this embodiment are all rectangular pipes, but are not limited thereto. Furthermore, the top of the horizontal pipe 2 and the vertical pipe 3 can be equipped with support partitions 7 with notches at the four corners. Side plate assemblies 95 can be installed between the vertically adjacent horizontal pipe 2 and the vertically adjacent vertical pipe 3.

[0135] The side panel assembly 95 includes an upper clamping strip 951, a lower clamping strip 952, and a side panel 953. The upper clamping strip 951 and the lower clamping strip 952 are respectively used to connect and fix the bottom surface of the upper horizontal tube 2 or the vertical tube 3 and the top surface of the lower horizontal tube 2 or the vertical tube 3. The specific connection method can be adhesion, locking, or welding. Furthermore, the opposite sides of the upper clamping strip 951 and the lower clamping strip 952 are respectively provided with grooves 954 for the upper and lower edges of the side panel 953 to be clamped.

[0136] Therefore, the frame structure 10 of this embodiment can be assembled into a storage cabinet structure 30 using the support partition 7 with notches and the side panel assembly 95, which is convenient for users to place items. Of course, the support partition 7 can also adopt other structures, and is not limited to this embodiment.

[0137] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.

[0138] In the description of the embodiments of this application, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships commonly used when the product is in use, or the orientations or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise explicitly specified.

Claims

1. A composite frame structure, characterized in that: This includes risers, horizontal pipes, vertical pipes, double-ended bolts, and nuts; The riser is provided with a transverse through hole and a longitudinal through hole, and the axes of the transverse through hole and the longitudinal through hole are located on the same plane; The double-ended screw includes a horizontal double-ended screw and a vertical double-ended screw, and the nut includes a horizontal nut and a vertical nut; The longitudinal double-ended screw is inserted into the longitudinal through hole, and the longitudinal double-ended screw is also provided with a transverse through clearance hole; the two ends of the longitudinal double-ended screw extend out of the longitudinal through hole respectively, for screwing to the end of the longitudinal tube or the longitudinal nut. The transverse double-ended screw is inserted into the transverse through hole, and the transverse double-ended screw also passes through the clearance hole of the longitudinal double-ended screw; the two ends of the transverse double-ended screw extend out of the transverse through hole respectively, for screwing to the end of the transverse tube or the transverse nut. The risers consist of at least four pipes, and the horizontal and vertical pipes consist of at least two pipes each. The horizontal and vertical pipes are distributed horizontally and vertically and can be detachably connected between the risers to form a frame structure.

2. The composite frame structure according to claim 1, characterized in that: The longitudinal double-headed screw has at least one positioning plane on its peripheral wall; the longitudinal through hole sidewall is provided with a limiting plane corresponding to the positioning plane.

3. A composite frame structure according to claim 2, characterized in that: The clearance hole is located on the positioning plane.

4. The composite frame structure according to claim 1, characterized in that: The longitudinal double-ended screws on each of the vertical pipes on one side of the frame structure are replaced with single-ended screws, which also have clearance holes.

5. A composite frame structure according to claim 1, characterized in that: The ends of the horizontal and vertical tubes are provided with internal threaded inserts, sunflower inserts, or expansion nut inserts to be screwed and fixed with the corresponding horizontal double-ended screws or vertical double-ended screws.

6. A composite frame structure according to claim 5, characterized in that: The sunflower insert includes a central post and guide flanges and two sunflower pieces distributed sequentially along the axial direction of the central post; the central post has a threaded connection hole for threaded engagement with a double-ended screw; the two ends of the central post are a guide flange and a sunflower piece, respectively, the outer periphery of the guide flange is raised like the outer periphery of the sunflower piece, and the outer diameter of the guide flange is larger than the inner diameter of the corresponding horizontal or vertical tube and forms a stop ring.

7. A composite frame structure according to claim 5, characterized in that: The expansion nut insert includes an inner expansion sleeve and a movable cone; the inner expansion sleeve has a conical cavity inside, the movable cone is installed in the conical cavity, and the end of the inner expansion sleeve near the outer side of the corresponding horizontal or vertical pipe has an expansion sleeve hole communicating with the conical cavity; the end of the double-ended screw is used to pass through the expansion sleeve hole and can drive the movable cone to move laterally in the conical cavity to open the inner expansion sleeve, so that the inner expansion sleeve is interference-fitted with the inner wall of the horizontal or vertical pipe.

8. A composite frame structure according to claim 5, characterized in that: The expansion nut insert includes an inner expansion sleeve; the inner expansion sleeve has a conical cavity inside, and the end of the inner expansion sleeve near the outer side of the corresponding horizontal or vertical pipe has an expansion sleeve hole communicating with the conical cavity, and the expansion sleeve hole is provided with internal threads; the end of the double-ended screw is used to screw into the expansion sleeve hole and can move laterally in the conical cavity to open the inner expansion sleeve, so that the inner expansion sleeve is interference-fitted with the inner wall of the horizontal or vertical pipe.

9. A composite frame structure according to claim 1, characterized in that: The riser is a hollow circular or rectangular tube; the horizontal tube is a hollow circular or rectangular tube; the vertical tube is a hollow circular or rectangular tube.

10. A composite frame structure according to claim 1, characterized in that: The riser is a hollow pipe with a butt joint at the bottom, which can be inserted and fixed to the top opening of another riser; and the butt joint of the upper riser has an inner transverse through hole and an inner longitudinal through hole located on the transverse and longitudinal through holes of the lower riser.

11. A composite frame structure according to claim 1, characterized in that: Supporting partitions are provided between adjacent horizontal tubes or between adjacent vertical tubes to form a shelving structure.

12. A composite frame structure according to claim 11, characterized in that: The four corners of the supporting partition are mounted on the shelf supports installed between the longitudinal tube and the adjacent transverse tube; a middle support plate is also installed in the middle of the longitudinally adjacent transverse tube, and the middle support plate is located below the supporting partition; the transverse tube and the longitudinal tube are respectively provided with recessed grooves corresponding to the shelf supports and the middle support plate, and the two ends of the shelf supports and the middle support plate are fitted and fastened in the grooves.

13. A composite frame structure according to claim 11, characterized in that: The frame structure is provided with multiple outer baffles and at least one door panel to form a storage cabinet structure; a fixing sleeve is provided between the uprights, horizontals, and longitudinals; the fixing sleeve has a through hole in the middle with both ends for double-ended screws to pass through, and a positioning block protrudes from the side of the fixing sleeve near the upright; screw holes or pre-embedded screws are provided at four equally spaced positions on the outer periphery of the fixing sleeve; the uprights are provided with corresponding positioning holes for the positioning blocks to be inserted, and it is ensured that the screw holes or screws of the fixing sleeves at the horizontals are located in the up-down and front-back directions, while the fixing sleeves at the longitudinals are located in the up-down and left-right directions; the supporting partition and the outer baffle are respectively locked to each fixing sleeve; the door panel is hinged to the front side of the frame structure.

14. A composite frame structure according to claim 11, characterized in that: The risers, horizontal pipes, and longitudinal pipes are all circular pipes; the support partition has recessed areas around its perimeter to form arc-shaped fastening parts; the support partition can be arbitrarily clamped and assembled and enclosed within the cavity formed by the risers, horizontal pipes, and longitudinal pipes on the front, back, top, bottom, left, and right sides of the frame structure.

15. A composite frame structure according to claim 11, characterized in that: Side panel assemblies are installed between vertically adjacent horizontal tubes and vertically adjacent vertical tubes to form a storage cabinet structure. The side panel assembly includes an upper clamping strip, a lower clamping strip, and a side panel. The upper clamping strip is used to connect and fix to the bottom surface of the upper horizontal tube or vertical tube, while the lower clamping strip is used to connect and fix to the top surface of the lower horizontal tube or vertical tube. The upper and lower clamping strips are also recessed on opposite sides for the upper and lower edges of the side panel to be engaged.

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