Folding logistics cart

Abstract

The utility model relates to a folding logistics cart which is characterized by comprising a main body frame 1 and a folding basket 2, the main body frame 1 is composed of a stand column frame 11 and a base plate 12, and the stand column frame 11 comprises two stand columns 110, a first auxiliary rod 112 fixedly connected between the two stand columns 110 and a first lattice vertical net 113 arranged between the stand columns 110 and the first auxiliary rod 112 in a covering mode. The base plate 12 comprises two flat rods 121, a second auxiliary rod 122 fixedly connected between the two flat rods 121 and a second lattice flat net 123 arranged between the flat rods 121 and the second auxiliary rod 122 in a covering mode. The two ends of a flat rod 121 of the chassis 12 are fixedly welded to the first end of an L-shaped connecting piece 33, and the second end of the L-shaped connecting piece 33 is movably and rotatably connected with the bottom of the stand column 110 through a bolt set 32. The folding logistics cart is reasonable in design, easy to operate and convenient to carry and store.

Description

Technical fields:

[0001] This utility model relates to a logistics trolley, and more particularly to a folding (multi-functional) logistics trolley. Background technology:

[0002] When people move goods or commodities in bulk, they usually use trolleys to improve efficiency and reduce the burden on personnel. With the development of modern e-commerce and commercial trade, the volume of goods is growing rapidly, and logistics trolleys have become one of the essential tools in production and life. In particular, in recent years, due to the popularization of family cars, it is of practical significance to develop a small logistics trolley that is easy to store in a car or at home and has multiple handling functions.

[0003] Some existing trolleys have foldable cargo protection structures, but these structures limit their size, making it impossible to load some large items. Some trolleys without cargo protection structures can load large items, but they are not suitable for loading some loose or easily scattered items.

[0004] Chinese patent CN217477311U proposes a vertical shopping cart to simplify complex folding components and solve the problem of transporting large items. The cart includes a main frame with a handle. Both ends of the handle are fixedly connected to vertical support tubes via bent pipes. Two vertical support tubes are fixedly connected by two first support rods. Side grilles are provided between the two vertical support tubes and on one side of the two first support rods. Two mounting plates are fixedly installed on one side of the side grilles. Each of the two mounting plates has a fixing plate on one side. Each fixing plate has several insertion slots on one side. Several basket frames are provided on the same side of the two mounting plates. The two ends of each basket frame are movably inserted into the insertion slots on the two fixing plates. Two movable plates are provided on each basket frame. Each movable plate has several locking slots. The two movable plates movably engage with the outer circumference of the basket frames through their respective locking slots.

[0005] The existing basket frame technology utilizes the parallelogram principle to allow several basket frames to fold upwards. Its disadvantages are: the height dimension increases after folding (equal to the sum of the long and short sides of the quadrilateral), and the stacked layers are thicker (multiple basket frame thicknesses are stacked). In order to facilitate folding, the existing technology cannot design the spacing between basket frames to be too close and it is inconvenient to set vertical frame strips, resulting in a large spacing between basket frames, which makes it easy for some flat items to slip off between the frames during transportation.

[0006] In addition, the lower ends of the vertical support tubes of the main frame in the existing technology are fixedly connected to the oblique support tubes by bending tubes. The disadvantage is that the main frame cannot be folded, the shopping cart products are large in size, and are not convenient to carry and store. Summary of the Invention:

[0007] In view of the problems existing in the prior art, the purpose of this utility model is to propose a folding logistics cart that is reasonably designed, easy to operate, and easy to carry and store.

[0008] This utility model is implemented using the following solution.

[0009] This utility model of a folding logistics trolley is characterized by: including a main frame and a folding basket frame; the main frame is composed of a column frame and a chassis, the column frame including two columns, a first auxiliary rod fixedly connected between the two columns, and a first grid mesh covering the space between the columns and the first auxiliary rod; the chassis including two horizontal rods, a second auxiliary rod fixedly connected between the two horizontal rods, and a second grid mesh covering the space between the horizontal rods and the second auxiliary rod; both ends of the horizontal rods of the chassis are fixedly welded to the first end of an L-shaped connector, and the second end of the L-shaped connector is rotatably connected to the bottom of the column through a bolt group;

[0010] The folding basket frame includes a first side frame, a second side frame, a front frame, and a hinge assembly. The first and second side frames are each composed of two half-frames connected by hinges. The two half-frames can be folded vertically inward along the hinge axis. The first ends of the first and second side frames are respectively hinged to the side of the front frame. The second ends of the first and second side frames are respectively hinged to a column by the hinge assembly, so that both the first and second side frames can rotate relative to the column and slide up and down along the axis.

[0011] Preferably, the L-shaped connector includes two L-shaped side plates and an intermediate connecting plate connected between the bottom of the two side plates near the first end. The two side plates are provided with through holes for bolts to pass through near the second end. The two sides of the flat rod are welded between the first ends of the two side plates and the bottom surface of the flat rod is located above the intermediate connecting plate. The second ends of the two side plates are attached to the two sides of the lower end of the column. The lower end of the column is provided with through holes corresponding to the through holes for bolts to pass through.

[0012] Preferably, the hinge assembly includes a coaxially arranged column hole sleeve, a return spring, a frame hole sleeve, and a hinge bolt shaft; one side of the first side frame and the second side frame are welded to the frame hole sleeve, and one side of the column is welded to the column hole sleeve; the column hole sleeve and the frame hole sleeve are rotatably connected through the hinge bolt shaft; and the return spring acts on the column hole sleeve and the frame hole sleeve to achieve elastic opening.

[0013] Preferably, the hinge assembly includes a first post hole sleeve, a first return spring, and a frame strip boss; one side of the post is welded to the first post hole sleeve, and the frame strip boss is welded to the frame strip on the side of the side frame, that is, the frame strip on the side of the side frame is directly used as the pivot.

[0014] Preferably, the two columns are equipped with telescopic rods, and spring clips are provided between the upper ends of the two columns and the telescopic rods.

[0015] Preferably, the lower part of the front frame is provided with a fastening component, which consists of a hinge end, a hook fastening end, and an operating crossbar; the operating crossbar is fixedly connected to the fastening component body, the fastening component is movably connected to the front frame via the hinge end, and the hook fastening end is fastened to the flat bar of the chassis.

[0016] Preferably, the middle part of the flat rod of the chassis and the middle part of the first auxiliary rod are provided with U-shaped strap hooks.

[0017] Preferably, the sides of the two flat rods of the chassis are provided with side blocks for limiting the side frames.

[0018] Preferably, the side stop includes a fixed block fixedly connected to the flat rod and a movable block connected to the fixed block by a fixing screw. The movable block can rotate 90 degrees along the axis of the screw and is maintained in the corresponding position by the static friction between the movable block and the fixed block.

[0019] Preferably, wheel sets are welded to the lower ends of the two columns. The wheel sets include axle frames welded to the lower part of the two columns and wheel axles passing through the two axle frames. Wheels are detachably connected to the two outer ends of the wheel axles.

[0020] The method of using this utility model folding logistics cart is as follows: When loading multiple small items, rotate the chassis downwards to unfold it, pull up the retractable lever to extend the folding basket frame, the front frame fasteners fasten the chassis, the side blocks rotate upwards to stand upright, the cavity of the basket frame is formed, and the items are loaded.

[0021] When loading large items, loosen the fasteners, push down the folding basket frame to free up the entire space in the chassis, and simultaneously rotate the side blocks downwards to flatten them. When loading large items, use the auxiliary straps to fasten the hooks, secure the items, and then drag and move them. To store, lift and slide the folding basket frame upwards, and rotate the folding chassis upwards until the chassis is flush against the folded basket frame. The chassis is now fully folded. To retract the lever, press down the spring pin and pull down the lever. After folding and retracting, the trolley has a smaller overall size, making it easy to store and put away. Attached image description:

[0022] The present invention will be further described below with reference to the accompanying drawings;

[0023] Figure 1 This is a front view of the logistics cart used in this application;

[0024] Figure 2 This is a left-side view of the logistics cart used in this application;

[0025] Figure 3 This is a top view of the logistics trolley used in this application;

[0026] Figure 4 This is a top view of the folding process of the basketball hoop in this application;

[0027] Figure 5 This is a front view of the folded basket used in this application for transporting large items;

[0028] Figure 6 This is a front view of the folded and stored logistics trolley in this application;

[0029] Figure 7 This is a schematic diagram of an embodiment (one) of the sliding hinge component of this application;

[0030] Figure 8 This is a schematic diagram of embodiment (II) of the sliding hinge assembly of this application;

[0031] Figure 9 This is a schematic diagram of the spring clip on the telescopic rod of this application;

[0032] Figure 10 This is a schematic diagram of the L-shaped connector of this application;

[0033] Figure 11 This is a sectional view of the side stop block of this application;

[0034] Figure 12 This is a schematic diagram of the fastening component in this application. Detailed implementation method:

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] This utility model folding logistics cart mainly consists of a main frame 1, a folding basket frame 2, and auxiliary accessories 3. The main frame 1 mainly consists of a column frame 11 and a chassis 12. The column frame 11 consists of a column 110, a telescopic rod 111, a first auxiliary rod 112, and a first grid vertical mesh 113. The chassis 12 consists of a horizontal rod 121, a second auxiliary rod 122, and a second grid horizontal mesh 123. The main frame 1 is made of metal tubing, and the folding basket frame 2 consists of a first side frame 21, a second side frame 22, a front frame 23, a hinge assembly 24, hinges 25, and a grid frame 26. See also... Figure 1-3 .

[0037] Auxiliary accessories 3 include tie rod sleeves 30, spring clips 31, bolt sets 32, L-shaped connectors 33, side blocks 34, fasteners 35, strap hooks 36, chassis plastic pads 37, pillar plastic pads 38, wheel sets 39, etc. (See details) Figure 1-3 .

[0038] The structure and assembly relationship of each component of this utility model:

[0039] The two uprights 110 are fixedly connected by welding at both ends of the first auxiliary rod 112. The first lattice mesh 113 is welded to the first auxiliary rod 112 and / or the uprights 110. The telescopic rod 111 is inserted into the inner cavity of the upper part of the upright 110 and can slide up and down. It is limited to the maximum stretching position by locking into the hole on the upright through the spring pin 31 set inside it (see Figure 9 Wheel sets 39 are welded to the lower ends of the two columns, wheel axles 391 are welded to the axle frame 392, axle frame 392 is welded to the lower end of the column, and wheels 393 are detachably installed on wheel axles 391; a U-shaped strap hook 36 is welded to the middle of the upper part of the first auxiliary rod 112, and the free end of the U-shaped strap hook 36 is welded to the middle of the upper part of the first auxiliary rod 112.

[0040] The U-shaped flat bar 121 of the chassis is fixedly connected to each other by welding the two ends of the second auxiliary bar 122. The second lattice flat mesh 123 is welded to the auxiliary bar and / or the flat bar. The two ends of the flat bar are fixedly welded to one end of the L-shaped connector 33. The other end of the L-shaped connector 33 is rotatably connected to the bottom of the column 110 by bolt group 32. The chassis plastic pad 37 is fixedly connected to the bottom of the middle part of the flat bar by screws. The side blocks 34 are connected to the left and right sides of the flat bar by screws. The front end of the middle part of the flat bar is welded with a strap hook 36 (see Figure 1 , 3 ).

[0041] The folding basket frame 2 includes a first side frame 21, a second side frame 22, a front frame 23, and a hinge assembly 24. One end of the first side frame 21 is movably hinged to the left end of the front frame 23 via a hinge 25. The other end of the first side frame is movably hinged to the left column 110 via the hinge assembly 24. The sliding hinge assembly 24 is welded and fixed to the column 110 and the first side frame 21 respectively. The first side frame can rotate around the axis of the hinge assembly 24 and can slide up and down along the axis.

[0042] The first side frame 21 consists of two identical half-frames, which are movably connected by a hinge 25. The two half-frames can be folded inward vertically along the hinge axis. The hinges are welded and fixed to the outer side of the frame of each half-frame. The hinge between the half-frames here is a normally closed hinge with a torsion spring. Without external force and under the action of the torsion spring, the two half-frames can be folded inward along the hinge axis, so that the folding basket frame 2 can be in a folded state.

[0043] Similarly, the second side frame 22 is hinged to the right end of the front frame 23; the other end of the second side frame is movably hinged to the right column 110 through the hinge assembly 24. The movable hinge assembly is welded and fixed to the column and the second side frame respectively. The second side frame can rotate around the axis of the hinge assembly 24 and slide up and down along the axis. The second side frame 22 is composed of two half-frames. The two half-frames are movable through the hinge 25. The two half-frames can be folded inward vertically along the hinge axis. The hinge is welded and fixed to the outer side of the two half-frames respectively. The hinge between the half-frames adopts a normally closed hinge with a torsion spring. Under the action of the torsion spring, the two half-frames can be folded inward along the hinge axis, so that the basket frame is in a folded state.

[0044] The lattice frame 26 is made of woven metal wire or one-piece perforated mesh, and the lattice frame 26 is welded to the side frame and the front frame; preferably, iron wire welding is used; the mesh size can be designed to be small, which helps to avoid the problem of some flat items easily slipping off the frame during transportation; the first side frame, the second side frame, and the front frame have equal widths to achieve the best folding effect.

[0045] The telescopic rod 111 has a built-in spring catch 31. When the rod is extended, the spring catch springs out and engages with the hole on the column 110 to limit the maximum extension position. When the rod is retracted, pressing the spring catch with your finger while pushing down the rod retracts the rod, reducing space occupation (see [reference]). Figure 2 , 9 ).

[0046] The column frame 11 and the chassis 12 are movably connected by an L-shaped connector 33. The L-shaped connector includes two L-shaped side plates and a middle connecting plate connected between the bottom of the two side plates near their first ends. The two side plates near their second ends have through holes for bolts. The two sides of the flat rod 121 are welded between the first ends of the two side plates, and the bottom surface of the flat rod 121 is located above the middle connecting plate. The second ends of the two side plates abut against the lower ends of the column. The lower end of the column has through holes corresponding to the through holes for bolts. When the chassis is unfolded, it is perpendicular to the column frame. When folded for storage, the L-shaped connector and the chassis rotate together around the bolt group 32 as an axis, achieving chassis folding and storage, reducing space occupation. Preferably, the L-shaped connector is made of metal stamping (see...). Figure 1 , 10 ).

[0047] One embodiment of the hinge assembly 24 includes a column hole sleeve 241A, a return spring 242A, a frame hole sleeve 243, and a hinge bolt 244. One side of the side frame is welded to the frame hole sleeve 243, and one side of the column 110 is welded to the column hole sleeve 241A. The column hole sleeve 241A and the frame hole sleeve 243 are rotatably connected by the hinge bolt 244. The ends of the column hole sleeve and the frame hole sleeve are pushed apart by the return spring 242A. Through the hinge assembly 24, the side frame can rotate around the axis of the hinge assembly 24 (that is, the axis of the hinge bolt 244) and can slide up and down along the axis. The side frame can be folded by rotation. Normally, when the folded basket frame is folded, it moves down and closes to the chassis under the action of gravity and the return spring. When the side frame and the entire basket frame slide upward under external force, it can avoid the interference phenomenon between the lower end of the front frame 23 and the chassis at the L-shaped connector when the chassis is folded, so as to reduce the thickness of the folded product (see Figure 1 , 7 ).

[0048] Embodiment 2 of the hinge assembly 24 includes a first post hole sleeve 241B, a first return spring 242B, and a frame strip boss 245; one side of the column 110 is welded to the first post hole sleeve 241B, and the frame strip boss 245 is welded to the frame strip of the side frame; unlike Embodiment 1, Embodiment 2 directly uses the side frame as the pivot, simplifying the structure and facilitating manufacturing (see...). Figure 1 , 8 ).

[0049] The side frame and the front frame, as well as the two half-frames inside the side frame, are rotatably connected by hinges 25 to achieve folding. Preferably, the hinge between the two half-frames inside the side frame is a normally closed hinge with a torsion spring. Under the action of the torsion spring, the two half-frames can be folded inward along the hinge axis, so that the basket frame is in a folded state. The hinge is existing technology and will not be described in detail.

[0050] The fastening component 35 consists of a hinge end, a hook-type fastening end, and an operating crossbar 351. The operating crossbar 351 is fixedly connected to the fastening component body. The fastening component can be integrally molded from plastic or metal; preferably, it is metal. The fastening component is movably connected to the front frame via the hinge end, and the hook-type fastening end fastens onto the chassis or engages with the strap hook 36, thereby restricting the movement of the folding basket frame in the X, Y, and Z directions. This ensures that the bottom edge of the basket is tightly connected to the chassis, forming a cavity to prevent items from scattering. Before folding the basket frame, the fastening component rotates upward to disengage the hook-type fastening end, and the basket frame is then pushed to fold (see...). Figure 12 ).

[0051] The strap hook 36 includes an upper strap hook and a lower strap hook. The lower strap hook is welded to the front end of the chassis, and the upper strap hook is welded to the upper end of the auxiliary rod of the column. When transporting larger items, it is used to secure the straps, so that the items are firmly tied to the trolley and do not slip. The strap hook also serves as the fixing end of the fastener 35 (see [link]). Figure 2 ,3 ).

[0052] The side block 34 includes a fixed block 341 fixedly connected to the flat rod 121 and a movable block 342 connected to the fixed block 341 by a fixing screw 343. A set of movable blocks is provided in the middle of each of the two outer sides of the chassis. The movable blocks can rotate 90 degrees along the screw axis. The static friction between the movable blocks and the fixed blocks maintains the position. Preferably, the material is plastic, which is used to limit the first side frame and the second side frame from extending beyond the outer perimeter of the chassis when they are unfolded, and to ensure that small items do not slip off the bottom.

[0053] When transporting larger items, the folding basket frame is folded down, and the side blocks are rotated downwards to a horizontal position, so as not to affect the placement of large items (see [reference]). Figure 1 , 11 ).

[0054] The chassis plastic pad 37 is fixed to the lower front end of the chassis horizontal crossbar with screws. It is used to support the chassis to keep it in a horizontal state, and at the same time to prevent the chassis horizontal crossbar from rubbing against the ground, which would cause wear on the crossbar and scratches on the ground. Preferably, the material is nylon or wear-resistant plastic.

[0055] The column plastic pad 38 is inserted into and fixed to the lower end of the column to prevent the column from rubbing against the ground, which would cause wear on the column and scratches on the ground; preferably, the material is nylon or wear-resistant plastic; the pull rod sleeve 30 is fitted onto the upper end of the telescopic pull rod to keep it warm and improve the feel; preferably, it is made of rubber and plastic.

[0056] The method of using this utility model folding logistics cart is as follows: When loading multiple small items, rotate the chassis downwards to unfold it, pull up the retractable lever to extend the folding basket frame, the front frame fasteners fasten the chassis, the side blocks rotate upwards to stand upright, the cavity of the basket frame is formed, and the items are loaded.

[0057] When loading large items, loosen the fasteners, push down the folding basket frame to free up the entire space in the chassis, and simultaneously rotate the side blocks downwards to flatten them. When loading large items, use the auxiliary straps to fasten the hooks, secure the items, and then drag and move them. To store, lift and slide the folding basket frame upwards, and rotate the folding chassis upwards until the chassis is flush against the folded basket frame. The chassis is now fully folded. To retract the lever, press down the spring pin and pull down the lever. After folding and retracting, the trolley has a smaller overall size, making it easy to store and put away.

[0058] Advantages of this folding logistics cart:

[0059] 1. By designing a push-pull folding basket frame, the height of the basket frame remains unchanged after folding, while the thickness is relatively small (approximately only 3 times the thickness of the basket frame), leaving more space for the chassis, making it easier to transport larger items and realize multiple functions.

[0060] 2. The design incorporates a sliding basket frame. When the chassis is folded for storage, the basket frame can slide upwards slightly to avoid interference between the lower end of the front frame and the chassis at the L-shaped connector, further reducing the folded thickness. When the chassis is unfolded for use, the sliding basket frame moves downwards and closes to the chassis under the action of gravity and a return spring. After being fastened and fixed, the basket frame and chassis are firmly connected to form a whole, which can hold some small, loose items.

[0061] 3. By designing a foldable main frame and retractable pull rod, as well as the aforementioned push-pull folding basket, the trolley has a small folded size, making it easy to store; it is especially easy to store in the trunk of a car, can be carried with the vehicle, and is always available, making it a good helper for logistics.

[0062] 4. The trolley is easy to fold and store; the push-pull folding basket frame can be folded simply by loosening the fasteners and pushing the basket frame towards the uprights; when storing the main frame, press down the spring pin, push down the telescopic rod, and fold the base upwards to complete the folding and storage of the frame and the whole. The operation is simple, quick, lightweight and practical.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A folding logistics cart, characterized in that: Includes the main frame (1) and the folding basket frame (2); The main frame (1) is composed of a column frame (11) and a base (12). The column frame (11) includes two columns (110), a first auxiliary rod (112) fixedly connected between the two columns (110), and a first grid mesh (113) covering the column (110) and the first auxiliary rod (112). The base (12) includes two horizontal rods (121), a second auxiliary rod (122) fixedly connected between the two horizontal rods (121), and a second grid mesh (123) covering the horizontal rod (121) and the second auxiliary rod (122). The two ends of the flat rod (121) of the chassis (12) are fixedly welded to the first end of the L-shaped connector (33), and the second end of the L-shaped connector (33) is rotatably connected to the bottom of the column (110) through the bolt group (32). The folding basket frame (2) includes a first side frame (21), a second side frame (22), a front frame (23), and a hinge assembly (24). The first side frame (21) and the second side frame (22) are each composed of two half-side frames, which are connected by hinges. The two half-frames can be folded inward vertically along the hinge axis. The first ends of the first side frame (21) and the second side frame (22) are respectively hinged to the side of the front frame (23) by hinges. The second ends of the first side frame (21) and the second side frame (22) are respectively hinged to a column (110) by the hinge assembly (24), so that the first side frame (21) and the second side frame (22) can rotate relative to the column and slide up and down along the axis.

2. The folding logistics cart according to claim 1, characterized in that: The L-shaped connector includes two L-shaped side plates and an intermediate connecting plate connected between the bottom of the two side plates near the first end. The two side plates are provided with through holes for bolts to pass through. The two sides of the flat rod (121) are welded between the first ends of the two side plates and the bottom surface of the flat rod (121) is located above the intermediate connecting plate. The second ends of the two side plates are attached to the two sides of the lower end of the column. The lower end of the column is provided with through holes corresponding to the through holes for bolts to pass through.

3. The folding logistics cart according to claim 1 or 2, characterized in that: The hinge assembly (24) includes a coaxially arranged column hole sleeve (241A), a return spring (242A), a frame hole sleeve (243), and a hinge bolt shaft (244); one side of the first side frame and the second side frame are welded to the frame hole sleeve (243), and one side of the column (110) is welded to the column hole sleeve (241A). The column hole sleeve (241A) and the frame hole sleeve (243) are rotatably connected through the hinge bolt shaft (244). The return spring (242A) acts on the column hole sleeve (241A) and the frame hole sleeve (243) to achieve elastic opening.

4. The folding logistics cart according to claim 1 or 2, characterized in that: The hinge assembly (24) includes a first post hole sleeve (241B), a first return spring (242B), and a frame strip boss (245); one side of the column (110) is welded to the first post hole sleeve (241B), and the frame strip boss (245) is welded to the frame strip on the side of the side frame, that is, the frame strip on the side of the side frame is directly used as the pivot.

5. The folding logistics cart according to claim 1, characterized in that: The two columns (110) are provided with telescopic rods (111), and spring pins (31) are provided between the upper ends of the two columns (110) and the telescopic rods (111).

6. The folding logistics cart according to claim 1, characterized in that: The lower part of the front frame (23) is provided with a fastening member (35), which consists of a hinge end, a hook fastening end, and an operating crossbar (351). The operating crossbar (351) is fixedly connected to the fastening member body, and the fastening member (35) is movably connected to the front frame (23) via the hinge end, and the hook fastening end is fastened to the flat bar (121) of the chassis.

7. The folding logistics cart according to claim 1, characterized in that: The chassis has U-shaped strap hooks (36) on the middle of the flat bar (121) and the middle of the first auxiliary bar (112).

8. The folding logistics cart according to claim 1, characterized in that: The two flat bars (121) of the chassis are each provided with side stops (34) for limiting the side frames.

9. The folding logistics cart according to claim 8, characterized in that: The side block (34) includes a fixed block (341) fixedly connected to the flat rod (121) and a movable block (342) connected to the fixed block (341) by a fixing screw (343). The movable block can rotate 90 degrees along the axis of the screw (343) and maintain the corresponding position state by the static friction between the movable block and the fixed block.

10. The folding logistics cart according to claim 1, characterized in that: The lower ends of the two columns are welded with wheel sets (39). The wheel sets (39) include axle frames (392) welded to the lower part of the two columns and wheel axles (391) passing through the two axle frames (392). Wheels (393) are detachably connected to the two outer ends of the wheel axles (391).

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