Connecting structure and folding net cage

Abstract

The utility model discloses a connecting structure and a folding net cage, which comprise a base, supporting seats, a third folding frame, a fourth folding frame, a first folding frame and a second folding frame, the third folding frame and the fourth folding frame are oppositely arranged, the first folding frame and the second folding frame are oppositely arranged, the supporting seats are arranged at four corners of the base, and bending notches are formed in the outer side surfaces of the supporting seats; a wedge-shaped groove is formed in the top end of the supporting base, a guiding piece is arranged on the inner side edge of the supporting base, and a straight groove opening is formed in the side edge of the guiding piece. Wedge-shaped pieces matched with the wedge-shaped grooves are arranged on the side edges of the third folding frame and the fourth folding frame, first connecting screws are arranged on the side edges of the bottoms of the third folding frame and the fourth folding frame in a penetrating mode, and the tail ends of the first connecting screws are located in the bending notches; the first folding frame and the second folding frame are connected with the third folding frame and the fourth folding frame through hinge parts; second connecting screws are arranged at the bottoms of the side edges of the first folding frame and the second folding frame in a penetrating mode, and the tail ends of the second connecting screws are located in the straight notches.

Description

Technical Field

[0001] This utility model relates to the field of transportation equipment technology, specifically to a connection structure and a folding wire mesh box. Background Technology

[0002] Foldable wire mesh cages are an important piece of equipment in the logistics and warehousing field, widely used for the storage, transportation, and stacking of goods. These cages offer advantages such as fixed storage capacity, neat stacking, clear visibility of stored items, and ease of inventory counting, while also improving the effective utilization of warehouse space. Furthermore, these products are sturdy, durable, easy to transport, and reusable, effectively reducing labor costs and packaging costs for warehousing companies.

[0003] In existing technologies, folding cages mostly use hinge connections or bolt fixing structures, which have the following shortcomings: First, traditional hinge structures are prone to wear and loosening during frequent folding, leading to a decrease in cage stability; second, multi-bolt fixing methods require repeated disassembly and assembly, which is cumbersome and inefficient; third, the frame connections lack guide and limit designs, making the frames prone to misalignment or jamming during folding. Furthermore, the connecting components of existing folding mechanisms are often damaged due to stress concentration, affecting their service life.

[0004] Therefore, there is a need for a folding cage that folds smoothly and connects stably. Utility Model Content

[0005] In order to overcome the technical defects of existing cages that are prone to wear and loosening when folded frequently and require repeated disassembly, this utility model provides a connection structure and a folding cage.

[0006] To solve the above problems, this utility model is implemented according to the following technical solution:

[0007] The connection structure described in this utility model includes:

[0008] Base;

[0009] The support base is located at the four corners of the base. The outer side of the support base is provided with a bending groove. The top of the support base is provided with a wedge-shaped groove. The inner side of the support base is provided with a guide member. The side of the guide member is provided with a straight groove.

[0010] The third and fourth folding frames are arranged opposite to each other. The sides of the third and fourth folding frames are provided with wedge-shaped parts that cooperate with the wedge-shaped groove. The bottom sides of the third and fourth folding frames are provided with first connecting screws, and the end of the first connecting screws is located in the bending groove.

[0011] The first and second folding frames are arranged opposite to each other and are connected to the third and fourth folding frames through hinges. The bottom side of the first and second folding frames is provided with a second connecting screw, the end of which is located in the straight groove.

[0012] Preferably, the hinge portion includes:

[0013] A positioning part is provided on two sides of the first folding frame and the second folding frame;

[0014] A rotating groove is provided on the two inner sides of the third and fourth folding frames, and a notch is provided on the rotating groove to accommodate the positioning part.

[0015] Preferably, both the first folding frame and the second folding frame are provided with side frame assemblies and end frame assemblies. The side frame assembly includes a side frame and a side plate, and a metal woven mesh is provided inside the side frame.

[0016] Preferably, the side frame assembly is movably connected to the end frame assembly.

[0017] The movable connection is provided with several fixing rings and connectors. The fixing rings are fixedly connected to the lower side of the end frame assembly, and the connectors are threaded through the fixing rings. One side of the connectors is connected to the side frame assembly.

[0018] Preferably, the first folding frame and the second folding frame have a folded state and an initial state;

[0019] The fixing ring is rotatable around the connector, allowing the end frame assembly to switch between a folded state and an initial state along with the side frame assembly.

[0020] Preferably, the first connecting screw and the second connecting screw are countersunk screws.

[0021] The head of the first connecting screw is wider than the width of the bending slot to prevent the third and fourth folding frames from detaching from the support base; the head of the second connecting screw is wider than the width of the straight slot to prevent the first and second folding frames from detaching from the guide.

[0022] Preferably, the threaded portions of the first connecting screw and the second connecting screw engage with threaded holes located on the bottom sides of the third folding frame, the fourth folding frame, the first folding frame, and the second folding frame.

[0023] Preferably, the support base is an angle steel, and the other outer side of the support base has a circular through hole, which is the external through hole for the second connecting screw.

[0024] Preferably, the guide is an angle steel, and both sides of the guide are smaller than the two sides of the support base.

[0025] Preferably, both sides of the first and second folding frames are provided with insertion parts; the upper ends of the third and fourth folding frames are provided with pin locks on both sides, each pin lock including a sliding and rotating rod; the pin lock cooperates with the insertion part through the rod to fix the third and fourth folding frames; the pin lock can disengage from the insertion part by sliding and rotating the rod, so that the folding cage can be folded.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] Support bases are distributed at the four corners of the base, forming bidirectional constraints (horizontal sliding and vertical limiting) on ​​the two sets of folding frames through bending slots and straight slots. This enhances the overall rigidity of the cage in the unfolded state and helps it withstand impact loads in logistics scenarios. The wedge-shaped groove at the top of the support base engages with the wedge-shaped parts of the third and fourth folding frames, limiting the vertical displacement of the frames in the unfolded state and preventing the frames from detaching from the base due to transportation vibrations. The first and second folding frames are directly connected to the third and fourth folding frames through hinges. When folding, only one frame needs to be pushed to move the rest of the frames synchronously, eliminating the need for step-by-step operation and significantly improving folding efficiency. The ends of the first connecting screws at the bottom of the third and fourth folding frames are embedded in the bending slots of the support bases, and together with the second connecting screws at the bottom of the second folding frame sliding in the straight slots of the guide, a controlled folding path is formed. This ensures that the frames fold inward synchronously along a preset trajectory, avoiding jamming or misalignment. Attached Figure Description

[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 This is a three-dimensional view of a connecting structure and a folding wire mesh box according to this utility model;

[0030] Figure 2 This is a structural view of a connection structure according to this utility model;

[0031] Figure 3 This is a perspective view of a connection structure and a bolt lock according to this utility model;

[0032] Figure 4 This is a partially enlarged view of a connection structure support base according to this utility model;

[0033] In the diagram: 10-base; 20-support seat; 21-bending groove; 22-wedge groove; 23-guide; 24-straight groove; 30-third folding frame; 31-fourth folding frame; 32-wedge; 33-first connecting screw; 40-first folding frame; 41-second folding frame; 42-second connecting screw; 43-hinge; 431-positioning part; 432-rotating groove; 433-notch; 44-side frame assembly; 441-side frame; 442-side plate; 45-end frame assembly; 46-fixing ring; 47-connector; 50-insertion part; 60-pin lock; 61-insertion rod. Detailed Implementation

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0035] like Figures 1-4 As shown in the figure, a connection structure of this utility model includes a base 10; a support 20, which is located at the four corners of the base 10, and has a bending groove 21 on its outer side; a wedge-shaped groove 22 at the top of the support 20, and a guide 23 on the inner side of the support 20, with a straight groove 24 on the side of the guide 23; and a third folding frame 30 and a fourth folding frame 31 arranged opposite each other, with wedge-shaped members 32 on the sides of the third folding frame 30 and the fourth folding frame 31 that cooperate with the wedge-shaped groove 22. The bottom sides of the folding frame 30 and the fourth folding frame 31 are provided with first connecting screws 33, the ends of which are located in the bending groove 21; the first folding frame 40 and the second folding frame 41 are arranged opposite to each other, and the first folding frame 41 and the second folding frame 42 are connected to the third folding frame 30 and the fourth folding frame 31 through hinges 43; the bottom sides of the first folding frame 40 and the second folding frame 41 are provided with second connecting screws 42, the ends of which are located in the straight groove 24.

[0036] Base 10: It adopts a rectangular metal frame, and the four corners are welded or bolted with support seats 20;

[0037] Support base 20: It is an L-shaped angle steel, which is vertically welded to the four corners of the base 10. An arc-shaped bending groove 21 is opened on its outer side (the side away from the center of the base), and a wedge-shaped groove 22 that is machined inward at the top. A guide 23 (short side angle steel) is welded on the inner side (the side closer to the center of the base). A vertical straight groove 24 is opened on the side of the guide 23.

[0038] The third folding frame 30 and the fourth folding frame 31 are arranged opposite each other and are rectangular frames welded from metal tubes. A wedge-shaped piece 32 that matches the shape of the wedge-shaped groove 22 is welded to the top of its side. The wedge-shaped piece 32 is a protrusion on the side of the third folding frame 30 and the fourth folding frame 31. The bottom side is fitted with a first connecting screw 33 (countersunk screw) through a threaded hole. The end of the screw extends into the bent groove 21 of the support base 20 and can slide along an arc path in the groove.

[0039] The first folding frame 40 and the second folding frame 41 are arranged opposite each other and are connected to the upper ends of the third folding frame 30 and the fourth folding frame 31 through the hinge part 43 (rotating shaft). A second connecting screw 42 (countersunk screw) is inserted through its bottom side, and the end of the screw is embedded in the straight groove 24 of the guide member 23 and can slide up and down in the straight groove.

[0040] Folding action implementation process

[0041] The third folding frame 30 and the fourth folding frame 31 are engaged in the wedge groove 22 at the top of the support base 20 by the wedge 32, so as to achieve vertical positioning.

[0042] The first connecting screw 33 is located at the end of the bending groove 21 (away from the center of the base), and the second connecting screw 42 is located at the lower end of the straight groove 24, so that the four folding frames are in an upright unfolded state.

[0043] Press the third folding frame 30 (or the fourth folding frame 31) towards the center of the base. The first connecting screw 33 at its bottom slides towards the center of the base along the arc trajectory of the bending groove 21, while simultaneously causing the third folding frame 30 to tilt inward with the wedge-shaped piece 32 as the fulcrum.

[0044] The tilt of the third folding frame 30 is linked to the first folding frame 40 through the hinge part 43, which forces the second connecting screw 42 at the bottom of the first folding frame 40 to slide upward along the straight slot 24, so that the first folding frame 40 rotates around the hinge part 43 and folds towards the center of the base.

[0045] Similarly, by symmetrically operating the fourth folding frame 31 and the second folding frame 41, the four folding frames eventually fold together above the base 10, forming a compact folded state.

[0046] The bending slot 21 and the first connecting screw 33: control the folding angle of the third and fourth folding frames (for example, the slot arc is 90°, so that the frame can be folded from upright to horizontal).

[0047] The straight slot 24 and the second connecting screw 42: constrain the sliding trajectory of the first and second folding frames, ensuring that the frames only move in the vertical direction when folding, and avoiding lateral displacement;

[0048] Wedge groove 22 and wedge part 32: When unfolded, the inclined surface self-locks to prevent the frame from shaking, and provides a fulcrum for rotation when folded.

[0049] Preferably, the positioning part 431 is provided on both sides of the first folding frame 40 and the second folding frame 41;

[0050] A rotating groove 432 is provided on the two inner sides of the third folding frame 30 and the fourth folding frame 31. A notch 433 is provided on the rotating groove 432 to accommodate the positioning part 431.

[0051] Positioning part 431: It is a cylindrical protrusion structure, symmetrically welded to the two side ends of the first folding frame 40 and the second folding frame 41 (near the connection with the third and fourth folding frames).

[0052] The material is the same as the frame (e.g., metal tube), and the diameter is slightly smaller than the width of the notch 433 of the rotating groove 432. A nylon bushing can be added to the surface to reduce friction.

[0053] Rotating groove 432: It is an arc-shaped through groove, which is opened on the metal plate or connecting block on the inner side (the side near the center of the base) of the third folding frame 30 and the fourth folding frame 31.

[0054] The arc-shaped trajectory matches the rotation path during folding, and the length of the groove corresponds to a 90° folding angle of the frame.

[0055] The end of the groove is provided with a notch 433. The width of the notch 433 is slightly larger than the diameter of the positioning part 431, and the depth can accommodate more than 1 / 2 of the height of the positioning part 431.

[0056] Deployment state locking: When the cage is fully deployed, the positioning parts 431 of the first folding frame 40 and the second folding frame 41 are engaged in the notches 433 at the ends of the rotating grooves 432 of the third folding frame 30 and the fourth folding frame 31.

[0057] The notch 433 provides circumferential restraint to the positioning part 431, preventing the frame from rotating unexpectedly due to external forces and ensuring that the cage remains stably unfolded during transportation.

[0058] Folding process:

[0059] When an upward pushing force is manually applied to the first folding frame 40 (or the second folding frame 41), the positioning part 431 disengages from the notch 433 and slides towards the starting end of the groove along the arc trajectory of the rotating groove 432.

[0060] During the sliding process, the positioning part 431 drives the first folding frame 40 to rotate around the hinge axis, while the second connecting screw 42 moves upward in the straight groove 24 of the guide 23, forcing the frame to fold towards the center of the base and close up above the base 10.

[0061] Reset and unfold:

[0062] Pull the first folding frame 40 outward, and the positioning part 431 slides along the rotating groove 432 to the notch 433. Relying on the weight of the frame or manual pressing, the positioning part 431 is re-embedded into the notch 433, thus completing the self-locking.

[0063] Key design details

[0064] Anti-detachment design of notch 433: The inner wall of notch 433 can be processed into a slope, so that the positioning part 431 can be automatically locked by the slope guide when it enters, and additional thrust is required to overcome frictional resistance when it is detached.

[0065] The curvature matching of the rotating groove 432: the radius of curvature of the groove is equal to the distance from the rotation center of the positioning part 431 to the axis of the hinge part 43, ensuring that the folding action is smooth and without interference.

[0066] Preferably, both the first folding frame 40 and the second folding frame 41 are provided with a side frame assembly 44 and an end frame assembly 45. The side frame assembly 44 includes a side frame 441 and a side plate 442, and a metal woven mesh is provided inside the side frame 441.

[0067] Preferably, the side frame assembly 44 is movably connected to the end frame assembly 45.

[0068] The movable connection is provided with several fixing rings 46 and connectors 47. The fixing rings 46 are fixedly connected to the lower side of the end frame assembly 45, and the connectors 47 are passed through the fixing rings 46. One side of the connectors 47 is connected to the side frame assembly 44.

[0069] Preferably, the first folding frame 40 and the second folding frame 41 have a folded state and an initial state;

[0070] The fixing ring 46 can rotate around the connector 47, so that the end frame assembly 45 can switch between the folded state and the initial state with the side frame assembly 44.

[0071] In this embodiment,

[0072] Side frame component 44:

[0073] Side frame 441: It is a rectangular frame welded from rectangular metal square tubes, and the inner side is optionally welded with crisscrossing reinforcing ribs;

[0074] Metal woven mesh 443: woven into a diamond mesh using Φ3mm stainless steel wire, with the edges coated with adhesive and embedded in the side frame 441, and fixed with pressure strip bolts;

[0075] Side panel 442: Optional, is a perforated aluminum plate, covering the outside of the side frame 441, and is connected to the side frame 441 by a snap fastener or by direct welding.

[0076] The upper and lower ends of the end frame assembly 45 are connected to the side frame assemblies 44 on both sides through movable connection structures.

[0077] The connection between the side frame assembly 44 and the end frame assembly 45 is provided with:

[0078] Fixing ring 46: is a long cylindrical metal ring, welded to the upper side of the end frame assembly 45;

[0079] Two fixing rings 46 are symmetrically welded to the left and right sides of each end frame assembly 45, and the inner diameter of the rings matches the shaft diameter of the connector 47.

[0080] Connector 47:

[0081] It is a U-shaped metal shaft, one end of which passes through the U-shaped opening of the retaining ring 46 and is locked by a nut;

[0082] The other end is welded to the end of the side frame 441 of the side frame assembly 44, so that the side frame 441 can rotate about the axis of the connector 47.

[0083] Initial state (expanded):

[0084] The end frame assembly 45 is perpendicular to the side frame assembly 44, and the U-shaped opening of the fixing ring 46 is aligned with the length direction of the side frame 441.

[0085] The pivot of connector 47 is located in fixed ring 46 and is kept stable by the gravity of end frame assembly 45 and the supporting force of side frame 441.

[0086] Manually push the side frame assembly 44 inward, and the side frame 441 will rotate around the axis of the connector 47 to the center of the cage;

[0087] The retaining ring 46 rotates synchronously with the end frame assembly 45 around the axis of the connector 47;

[0088] When the side frame 441 is rotated to be parallel to the end frame assembly 45 (folding angle ≥ 90°), the end frame assembly 45 is folded to the inside of the side frame 441, completing the folding.

[0089] Reset and unfold: Pull the side frame assembly 44 outward, and the fixing ring 46 rotates in the opposite direction until the end frame assembly 45 is perpendicular to the side frame 441 again, thus achieving self-locking.

[0090] Preferably, the first connecting screw 33 and the second connecting screw 42 are countersunk screws.

[0091] The head of the first connecting screw 33 is wider than the width of the bending slot 21 to prevent the third folding frame 30 and the fourth folding frame 31 from detaching from the support base 20; the head of the second connecting screw 42 is wider than the width of the straight slot 24 to prevent the first folding frame 40 and the second folding frame 41 from detaching from the guide member 23.

[0092] First connecting screw 33:

[0093] It is an M8 countersunk screw with a head diameter of 12mm and a thread length of 20mm.

[0094] The screw is installed in the threaded hole on the bottom side of the third folding frame 30 and the fourth folding frame 31, with the end of the screw extending into the bending groove 21 of the support seat 20.

[0095] Anti-detachment mechanism: The width of the bending groove 21 is 10mm, which is smaller than the diameter of the screw head (12mm). When the frame is pulled outward by external force, the screw head is stuck on the outside of the bending groove 21, preventing the frame from detaching from the support base 20.

[0096] Second connecting screw 42:

[0097] It is an M6 countersunk screw with a head diameter of 10mm and a thread length of 15mm.

[0098] Installed in the threaded holes on the bottom side of the first folding frame 40 and the second folding frame 41, with the end of the screw embedded in the straight slot 24 of the guide 23;

[0099] Anti-detachment mechanism: The width of the straight slot 24 is 8mm, which is smaller than the diameter of the screw head (10mm). When the frame is folded, the screw head abuts against the outer edge of the straight slot 24 to prevent the frame from detaching from the guide 23.

[0100] Preferably, threaded holes are provided on the bottom side of the third folding frame 30, the fourth folding frame 31, the first folding frame 40, and the second folding frame 41.

[0101] The threaded portions of the first connecting screw 33 and the second connecting screw 42 engage with the threaded holes located on the bottom sides of the third folding frame 30, the fourth folding frame 31, the first folding frame 40, and the second folding frame 41.

[0102] Threaded hole settings:

[0103] M8 threaded holes are provided on the bottom side of the third folding frame 30 and the fourth folding frame 31, 50mm from the end.

[0104] M6 threaded holes are provided on the bottom side of the first folding frame 40 and the second folding frame 41 at a distance of 30mm from the end.

[0105] Assembly process:

[0106] Screw the first connecting screw 33 into the threaded hole of the third folding frame 30 until the end of the screw protrudes 10mm.

[0107] Place the frame vertically, align the end of the screw with the bending slot 21 of the support base 20 and push it into the slot;

[0108] Similarly, install the second connecting screw 42, ensuring that the end of the screw can slide freely within the straight slot 24.

[0109] Preferably, the support base 20 is an angle steel, and the other outer side of the support base 20 has a circular through hole, which is the external through hole of the second connecting screw 42.

[0110] Preferably, the guide member 23 is an angle steel, and both sides of the guide member 23 are smaller than the two sides of the support base 20.

[0111] Support base 20: Made of 50×50×5mm angle steel, vertically welded to the four corners of base 10;

[0112] The bending groove 21 is opened on one outer side of the angle steel, and an 8mm circular through hole 25 is opened on the other outer side (perpendicular to the surface where the bending groove is located) for inserting the second connecting screw 42.

[0113] Guide component 23: Made of 30×30×3mm angle steel, with the short side welded to the inner side of the support base 20;

[0114] The lengths of both sides of the angle steel are less than the corresponding side of the support 20 (for example, the guide height is 20mm and the support height is 50mm) to avoid interference with the movement trajectory of the folding frame.

[0115] Preferably, both sides of the first folding frame 40 and the second folding frame 41 are provided with insertion parts 50; the upper ends of the third folding frame 30 and the fourth folding frame 31 are provided with pin locks 60, each pin lock including a sliding and rotating rod 61; the pin lock 60 cooperates with the insertion part 50 through the rod 61 to fix the third folding frame 30 and the fourth folding frame 31; the pin lock 60 can disengage from the insertion part 50 by sliding and rotating the rod 61, so that the folding cage can be folded.

[0116] Connector 50:

[0117] Rectangular grooves are formed at the ends of both sides of the first folding frame 40 and the second folding frame 41. The grooves are 15mm deep and have guide slopes on their inner walls.

[0118] The bottom of the groove has a Φ6mm through hole for limiting the insertion of the rod 61.

[0119] Bolt lock 60:

[0120] Installed on both sides of the upper end of the third folding frame 30 and the fourth folding frame 31, including:

[0121] Insert rod 61: Φ5mm stainless steel round rod, with a tapered end and an annular groove in the middle of the rod body;

[0122] Sliding sleeve: Sleeve on the outside of the insertion rod 61, which can slide along the axial direction of the insertion rod;

[0123] Rotary handle: Fixed to the top of the insertion rod 61, used for manually rotating the insertion rod.

[0124] Lock operation:

[0125] When the cage is unfolded, insert the plug 61 into the groove of the plug part 50 until the conical head passes through the bottom through hole;

[0126] Rotating the handle causes the annular groove of the insertion rod 61 to engage with the elastic buckle inside the sliding sleeve, thereby fixing the insertion rod axially.

[0127] Unlock Folding:

[0128] Rotate the handle in the opposite direction to release the latch lock;

[0129] Pull the sliding sleeve outward to disengage the insertion rod 61 from the groove of the insertion part 50, thus releasing the frame connection.

[0130] In this embodiment, preferably, the connecting structure 10 is made of Q235 steel.

[0131] Q235 steel is a common low-carbon structural steel with many advantages, making it suitable for various engineering and manufacturing applications. The main advantages of Q235 steel are as follows:

[0132] Good weldability: Q235 steel has excellent weldability and is suitable for various welding processes, including electric arc welding, gas welding, and submerged arc welding.

[0133] Good plasticity and ductility: As a low-carbon steel, Q235 steel has good plasticity and ductility, and can undergo large deformation under external force without easily breaking. This makes Q235 steel excellent in terms of impact resistance and tensile strength, and suitable for various structures and applications with high load-bearing requirements.

[0134] Moderate strength: The tensile strength of Q235 steel is typically between 370-500 MPa, which meets the strength requirements of general structural components. It is suitable for structures bearing medium loads, such as frames and bracing structures.

[0135] Good machinability: Q235 steel has good machinability, enabling it to be cut, stamped, bent, forged, and processed, with strong deformation capacity during processing. This allows it to be easily processed into various shapes to meet different design requirements.

[0136] Lower cost: Q235 steel is a common low-carbon steel with lower raw material costs and more economical processing costs. This makes Q235 steel widely used in many cost-sensitive projects, such as construction, bridges, and automobile manufacturing.

[0137] Good corrosion resistance: Q235 steel has good corrosion resistance, especially after surface treatments such as hot-dip galvanizing and powder coating, which can improve its oxidation resistance and extend its service life in harsh environments. This makes Q235 steel widely used in outdoor and humid environments.

[0138] Recyclability: Q235 steel has good recyclability, meeting green environmental protection requirements. In the process of recycling scrap steel, Q235 steel can be reprocessed and reused, resulting in a low environmental impact.

[0139] Good wear resistance: After surface treatment, Q235 steel can improve wear resistance and is suitable for applications that are subject to wear, such as mechanical parts, tool racks, etc.

[0140] Optionally, the metal woven mesh has a smooth outer panel.

[0141] In summary, this utility model uses the bent slot 21 and straight slot 24 of the support base 20 to form a bidirectional motion constraint on the two sets of folding frames. Combined with the vertical limiting of the wedge slot 22, the linkage traction of the hinge part 43, and the quick unlocking of the pin lock 60, it realizes the single-step folding and precise resetting of the logistics trolley net box. Compared with the traditional hinge or bolt fixing structure, its innovation lies in: integrating the folding guidance (slot), limiting (wedge fit), and locking (pin) functions into the angle steel support base 20, simplifying the assembly process; the combination of the countersunk screw anti-loosening design (head size > slot width) and Q235 steel material (high plasticity, easy to weld) significantly improves impact resistance and durability; the dual-action unlocking (sliding + rotation) of the pin lock 60 and the frame linkage folding mechanism reduce folding time by more than 60%, adapting to the high-frequency operation requirements of logistics scenarios. This design effectively solves the technical pain points of traditional wire mesh cages, such as folding and jamming, cumbersome bolt disassembly and assembly, and easy loosening of connectors, providing a reliable solution for the modular and lightweight development of logistics vehicles.

[0142] The working principle of the connection structure and folding wire mesh cage of this utility model is as follows:

[0143] The wedge-shaped pieces 32 at the top of the third and fourth folding frames 30 and 31 are embedded in the wedge-shaped grooves 22 of the support base 20, forming a vertical self-locking mechanism to prevent the frames from shaking during transportation; the positioning parts 431 of the first folding frame 40 and the second folding frame 41 are engaged in the notches 433 of the rotating groove 432 to achieve circumferential limiting; the insert rod 61 of the pin lock 60 is inserted into the insertion part 50 and rotated to lock, enhancing the overall rigidity of the frame. When the third folding frame 30 is pressed, the first connecting screw 33 at its bottom slides along the arc trajectory of the bending groove 21, forcing the frame to tilt inward with the wedge-shaped pieces 32 as the fulcrum;

[0144] The tilting of the third folding frame 30 pulls the first folding frame 40 through the hinge part 43, and the second connecting screw 42 moves upward along the straight groove 24, causing the first folding frame 40 to rotate around the hinge axis; simultaneously, the latch lock 60 is unlocked (sliding and rotating the plug rod 61 to exit the plug part 50), causing all frames to fold towards the center of the base. The arc path of the bending groove 21 guides the third and fourth frames 30 and 31 to complete a 90° fold; the straight groove 24 constrains the first and second frames 40 and 41 to move only in the vertical direction, avoiding lateral displacement; the curvature of the rotating groove 432 matches the rotation radius of the positioning part 431, ensuring smooth folding action. In reverse operation, the weight of the frames and manual traction cause the positioning part 431 to slide into the recess 433 for self-locking, the wedge 32 and the wedge groove 22 re-engage, and the latch lock 60 is inserted into the plug part 50 to complete the fixation.

[0145] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A connection structure for a collapsible net cage, characterized by, It includes: Base; Supporting seat, which is provided on four corners of the base, and the outer side of the supporting seat is provided with a bent notch; the top end of the supporting seat is provided with a wedge-shaped groove, and the inner side of the supporting seat is provided with a guide piece, and the side of the guide piece is provided with a straight notch; Oppositely arranged third folding frame and fourth folding frame, the side of the third folding frame and the fourth folding frame is provided with a wedge-shaped piece matched with the wedge-shaped groove, and the bottom side of the third folding frame and the fourth folding frame is provided with a first connecting screw, and the end of the first connecting screw is located in the bent notch; Oppositely arranged first folding frame and second folding frame, the first folding frame and the second folding frame are connected with the third folding frame and the fourth folding frame through a hinge part; the side bottom of the first folding frame and the second folding frame is provided with a second connecting screw, and the end of the second connecting screw is located in the straight notch.

2. A connection structure according to claim 1, characterized in that The hinge part includes: Positioning part, which is provided on the two sides of the first folding frame and the second folding frame; Rotary groove, which is provided on the two inner sides of the third folding frame and the fourth folding frame, and a notch is formed on the rotary groove for accommodating the positioning part.

3. The connecting structure according to claim 1, wherein: The first folding frame and the second folding frame are each provided with a side frame assembly and an end frame assembly, the side frame assembly includes a side frame and a side plate, and the side frame is provided with a metal woven mesh.

4. The connecting structure according to claim 3, wherein: The side frame assembly is movably connected to the end frame assembly, The movable connection is provided with a plurality of fixing rings and connecting pieces, the fixing rings are fixedly connected to the lower side of the end frame assembly, the connecting pieces are provided on the fixing rings, and one side of the connecting pieces is connected with the side frame assembly.

5. The connecting structure according to claim 4, wherein: The first folding frame and the second folding frame have a folded state and an initial state; The fixing ring can rotate around the connecting piece, so that the end frame assembly can be converted between the folded state and the initial state with the side frame assembly.

6. The connecting structure according to claim 1, wherein: The first connecting screw and the second connecting screw are countersunk screws, The head size width of the first connecting screw is greater than the width of the bent notch, so as to prevent the third folding frame and the fourth folding frame from being separated from the supporting seat; and the head size width of the second connecting screw is greater than the width of the straight notch, so as to prevent the first folding frame and the second folding frame from being separated from the guide piece.

7. The connecting structure according to claim 1, wherein: The threaded part of the first connecting screw and the second connecting screw is matched with the threaded hole provided on the bottom side of the third folding frame, the fourth folding frame, the first folding frame and the second folding frame.

8. The connecting structure according to claim 1, wherein: The support seat is an angle steel, and the other outer side of the support seat has a circular through hole which is a hole for the second coupling screw to pass through.

9. The connecting structure of claim 1, wherein: The guide is an angle steel, and two side edges of the guide are smaller than two side edges of the support seat.

10. A foldable net cage comprising the connecting structure of any one of claims 1-9, wherein: Two side edge ends of the first and second foldable frames are provided with insertion parts; the upper ends of the third and fourth foldable frames are provided with bolt locks on two sides, the bolt locks comprising insertion rods capable of sliding and rotating; the bolt locks are matched with the insertion parts through the insertion rods, and are used for fixing the third and fourth foldable frames; the bolt locks can be separated from the insertion parts through the sliding and rotation of the insertion rods, so that the foldable net cage can be folded.

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