Table trolley

Abstract

The utility model discloses a table trolley which is characterized in that the table trolley comprises a trolley body, the trolley body comprises a base, a plurality of stand columns vertically arranged at the four corners of the base and a plurality of cross beams arranged among the stand columns, and a plurality of damping trundles are arranged at the bottom of the base; the layer frame is arranged in the trolley main body, and one end of the layer frame is hinged to the stand column; the bearing blocks are arranged on the base, the layer frame and the cross beam respectively, and the bearing blocks are provided with grooves matched with the edges of workpieces in shape; the plurality of pneumatic springs at least comprise a pair of pneumatic springs used for assisting the layer frame to turn over, one end of each pneumatic spring is connected with the trolley main body through a rotating shaft, and the other end of each pneumatic spring is provided with a movable connecting part connected with the bottom of the layer frame; and the other pair of pneumatic springs is symmetrically mounted on the left side and the right side of the trolley main body.

Description

A logistics trolley Technical Field

[0001] This utility model relates to the field of logistics and transportation technology, specifically to a logistics trolley. Background Technology

[0002] Logistics trolleys originated from production and transportation needs. Also known as cargo trolleys or cage trolleys, they are unit mobile container equipment equipped with four casters for transporting and storing materials. They are commonly used in the logistics distribution of large supermarkets or the logistics turnover between factory processes. They are generally divided into dedicated logistics trolleys and grid-type folding trolleys.

[0003] In specific manufacturing environments, such as assembly lines for automotive parts, higher demands are placed on the precision and efficiency of logistics trolley operations. Traditional or general-purpose logistics trolleys, when handling, storing, and retrieving workpieces of specific shapes and materials, suffer from unstable workpiece fixation. Existing trolleys typically employ simple flat shelves or generic grid structures, lacking fixing devices adapted to the specific edge shapes of workpieces. Workpieces are fixed solely by the friction of the shelf surface, making them prone to sliding, displacement, or even collisions during transport due to vibration or sudden stops, leading to workpiece damage or the need for readjustment, thus impacting production rhythm. Loading and unloading operations are inconvenient. Existing trolley shelves are mostly fixed designs, unable to be flipped or adjusted in angle. Operators must bend over or reach deep into the trolley when loading and unloading workpieces, especially when retrieving workpieces from the bottom layer, where operating space is limited, increasing labor intensity. Furthermore, some trolleys lack power assist devices, requiring complete manual operation for opening and closing shelves or top covers, which is time-consuming and labor-intensive, significantly reducing efficiency, especially in scenarios with frequent loading and unloading. The existing trolleys suffer from insufficient stability during movement. Most have ordinary casters that lack effective shock absorption mechanisms. When moving on uneven surfaces in the factory, the trolleys are prone to significant vibrations, which not only increases the risk of workpiece displacement but may also damage precision parts, limiting their applicability in demanding production environments. For example, when removing specific parts from the trolley and delivering them to the production line, if the trolley structure fails to provide convenient operation and stable support, it will severely limit production cycle time and overall efficiency. Summary of the Invention

[0004] In order to overcome the technical defects of unstable workpiece positioning and inconvenient loading and unloading operations in the prior art, this utility model provides a logistics trolley.

[0005] To solve the above problems, this utility model is implemented according to the following technical solution:

[0006] The logistics trolley described in this utility model includes:

[0007] The trolley body includes a base, multiple vertical columns arranged at the four corners of the base, and multiple crossbeams arranged between the columns. The bottom of the base is provided with multiple shock-absorbing casters.

[0008] A layer frame is provided inside the trolley body, and one end of the layer frame is hinged to the column;

[0009] Multiple receiving blocks are respectively disposed on the base, the layer frame and the crossbeam, and the receiving blocks are provided with grooves that are adapted to the shape of the workpiece edge;

[0010] Multiple pneumatic springs, including at least one pair of pneumatic springs for assisting the flipping of the layer frame, one end of the pneumatic spring is connected to the trolley body via a pivot, and the other end is provided with a movable connecting part connected to the bottom of the layer frame, wherein another pair of pneumatic springs are symmetrically installed on the left and right sides of the trolley body.

[0011] Preferably, the receiving block includes a first receiving block and a second receiving block. The first receiving block is connected to the upper end face of the layer frame, and a plurality of second receiving blocks are connected to the crossbeam near the hinge point between the layer frame and the column. The groove of the first receiving block is adapted to the bottom of the workpiece, and the opening of the groove faces upward. The groove of the second receiving block is adapted to the side of the workpiece, and the opening of the groove faces into the trolley body.

[0012] When the workpiece is installed, the bottom of the workpiece is fitted into the groove of the first receiving block, and the side of the workpiece is fitted into the groove of the second receiving block.

[0013] Preferably, the surface of the groove is provided with anti-slip texture.

[0014] Preferably, both the first receiving block and the second receiving block have a hollow design.

[0015] Preferably, it also includes a top cover.

[0016] The top cover is a rectangular frame structure. One end of the top cover is hinged to the column and located on the top of the trolley body, and is equipped with a pneumatic spring connected to the crossbeam.

[0017] Preferably, it also includes several support blocks.

[0018] Several support blocks are symmetrically arranged on the column, wherein a pair of support blocks are used to support the other end of the layer frame, and another pair of support blocks are used to support the top cover.

[0019] Preferably, the shock-absorbing caster is installed at the bottom of the trolley body, the shock-absorbing caster is threadedly connected to the base, and the shock-absorbing caster includes a wheel body and a shock-absorbing mechanism, the shock-absorbing mechanism being placed between the base and the wheel body.

[0020] Preferably, each of the columns has a positioning part at its top and a stacking positioning foot at its lower end. The stacking positioning foot is a rectangular block structure and has a positioning groove at the center of its bottom.

[0021] When multiple trolleys are stacked, the positioning part of the next trolley is embedded into the positioning groove of the stacking positioning foot of the previous trolley.

[0022] Preferably, it also includes a traction mechanism.

[0023] The traction mechanism is located at both ends of the trolley body and is connected to the trolley body via pins.

[0024] Preferably, the support block is made of polyurethane material.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] By incorporating a shelf frame that can be hinged to a column at one end, along with a pair of symmetrically installed pneumatic springs to assist in flipping the frame, operators can more easily and effortlessly raise or lower the frame, thereby improving the efficiency of loading and unloading workpieces and reducing the labor intensity of manual operations. Multiple receiving blocks with grooves adapted to the edge shape of the workpieces are installed on the base, shelf frame, and crossbeams of the trolley body. These receiving blocks provide multi-point support and locking according to the specific shape of the workpieces, effectively preventing unstable movement, collisions, or deformation of the workpieces during transportation and turnover, ensuring the integrity of the workpieces. Multiple shock-absorbing casters at the bottom of the trolley body allow the trolley to move smoothly and flexibly on the factory floor, facilitating the transfer of the trolley loaded with workpieces to different workstations and improving the efficiency of logistics turnover. Attached Figure Description

[0027] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 is a perspective view of a logistics trolley according to the present invention;

[0029] Figure 2 is a perspective view of a logistics trolley according to the present invention;

[0030] Figure 3 is a side view of a logistics trolley in a stacked state according to the present invention.

[0031] Figure 4 is a side view of a logistics trolley according to this utility model;

[0032] Figure 5 is a side view of a logistics trolley according to this utility model;

[0033] Figure 6 is a side view of the receiving block of this utility model.

[0034] Figure 7 is a perspective view of a logistics trolley loading workpieces according to this utility model.

[0035] Figure 8 is a partial enlarged view of a logistics trolley according to this utility model;

[0036] In the diagram: 10-Cart body, 20-Layer frame, 30-Supporting block, 40-Pneumatic spring, 50-Traction mechanism; 11-Base, 12-Column, 13-Crossbeam, 14-Shock-absorbing caster, 15-Supporting block, 16-Top cover, 17-Positioning part; 31-Groove, 32-First support block, 33-Second support block; 41-Rotating shaft, 42-Modible connecting part; 51-Pin shaft; 141-Wheel, 142-Shock-absorbing mechanism; 101-Stacking positioning foot, 102-Positioning groove. Detailed Implementation

[0037] 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.

[0038] As shown in Figures 1 to 8, the logistics trolley of this utility model includes:

[0039] The trolley body 10 includes a base 11, multiple columns 12 vertically arranged at the four corners of the base 11, and multiple crossbeams 13 arranged between the columns. The bottom of the base 11 is provided with multiple shock-absorbing casters 14.

[0040] The layer frame 20 is located inside the trolley body 10, and one end of the layer frame 20 is hinged to the column 12.

[0041] Multiple receiving blocks 30 are respectively disposed on the base 11, the layer frame 20 and the crossbeam 13. Each receiving block 30 is provided with a groove 31 that matches the shape of the workpiece edge.

[0042] Multiple pneumatic springs 40, including at least one pair of pneumatic springs for assisting the flipping of the layer frame 20, one end of the pneumatic spring is connected to the trolley body 10 via a pivot 41, and the other end is provided with a movable connecting part 42 connected to the bottom of the layer frame 20, wherein another pair of pneumatic springs are symmetrically installed on the left and right sides of the trolley body 10.

[0043] The trolley body 10 is a rectangular frame structure with overall dimensions of 1160 mm in length, 760 mm in width, and 1200 mm in height. The trolley body 10 is constructed from four uprights 12 and multiple crossbeams 13 via argon arc welding. The uprights 12 are 60 mm × 60 mm × 3 mm square steel columns extending vertically to a height of 1075 mm. The crossbeams 13 are 50 mm × 50 mm × 3 mm square steel beams, horizontally connected to the uprights 12 to form a two-layer support structure. Four shock-absorbing casters 14 are welded to the bottom of the trolley body 10. These casters are bolted to the base 11, ensuring stable movement of the trolley on the factory floor.

[0044] The layer frame 20 is horizontally positioned inside the trolley body 10, 390 mm away from the base 11. The layer frame 20 is a rectangular frame welded from 50 mm × 50 mm × 3 mm aluminum alloy square tubing, with dimensions of 1080 mm × 680 mm. One end of the layer frame 20 is connected to the inside of a column 12 of the trolley body 10 via two steel hinges. The hinges are fixed to the column and the layer frame 20 with bolts, allowing the layer frame 20 to rotate around the hinge axis for easy loading and unloading of workpieces. Ten 8 mm diameter positioning holes are evenly distributed on the upper surface of the layer frame 20 for fixing the receiving block 30. The specific number of positioning holes is only a preferred embodiment and will not be elaborated upon here.

[0045] The receiving block 30 is a right-angled trapezoid with a base length of 93 mm and a height of 85 mm. The receiving block 30 is hollow to reduce weight, and its bottom surface has four 6 mm diameter threaded connection holes that correspond to the positioning holes of the layer frame 20. The receiving block 30 is fixed to the layer frame 20 using M6 screws. Twenty receiving blocks 30 are installed on each layer frame 20, evenly distributed on both sides. The top surface of the receiving block 30 has a rectangular groove 31, the inner surface of which is engraved with a cross-grid anti-slip pattern to ensure stable fixation of the workpiece.

[0046] In this embodiment, a preferred implementation is provided, wherein the receiving block 30 is made of polyurethane;

[0047] Polyurethane (PU) is a polymer compound produced by reacting polyisocyanates with polyether polyols or polyester polyols. This synthesis process allows for the production of products with various forms and properties, ranging from flexible foams to rigid plastics and elastomers, by adjusting the proportions of raw materials and reaction conditions, thus offering extremely high design flexibility.

[0048] Polyurethane was chosen as the material for the receiving block 30 based on its series of excellent properties, which make it ideal for securing and protecting logistics components.

[0049] 1. Excellent elasticity and cushioning performance: Polyurethane materials have good resilience, which can effectively absorb and disperse the impact and vibration generated during handling or transportation, providing good cushioning protection for the workpiece and reducing workpiece damage.

[0050] 2. High wear resistance: During repeated loading and unloading of workpieces, the receiving block will be subject to a certain amount of friction. Polyurethane material has better wear resistance, which can ensure that the receiving block is not easily worn during long-term use and extend the service life of the component.

[0051] 3. Good gripping force: The polyurethane surface has a certain coefficient of friction, which helps to improve the stability of the workpiece in the groove. Combined with the shape of the groove and the anti-slip texture, it can more effectively fix the workpiece and prevent it from sliding.

[0052] 4. Oil and chemical resistance: In industrial production environments, there may be contact with oil or other chemicals. Polyurethane materials have good resistance to a variety of oils and chemicals and can maintain stable performance in harsh environments.

[0053] 5. Easy to mold and process: Polyurethane can be easily made into various complex shapes through injection molding, casting and other processes to ensure a good fit with the workpiece.

[0054] Pneumatic springs 40 are symmetrically installed on the left and right sides of the trolley body 10, with two springs on each side, for a total of four pneumatic springs 40. Each pneumatic spring 40 is 500 mm long and has a maximum extension stroke of 200 mm. One end of the pneumatic spring 40 is fixed to the inside of the crossbeam 13 of the trolley body 10 via a 10 mm diameter steel shaft 41, which is connected to the crossbeam 13 via a bearing. The other end of the pneumatic spring 40 is equipped with a spherical hinge joint, which is a movable connection part 42 between the pneumatic spring 40 and the bottom of the shelf frame 20. It is fixed to the pre-reserved mounting hole at the bottom of the shelf frame 20 by bolts, forming a movable connection. The pneumatic springs 40 are arranged diagonally at an angle of approximately 45 degrees, providing support for the rotation of the shelf frame 20 and facilitating the operator to adjust the angle of the shelf frame 20.

[0055] In this embodiment, there is an optional configuration where the traction mechanism 50 is located at the front end of the trolley body 10 and includes a traction hook. The traction hook is a U-shaped steel structure and is fixed to the center of one side of the base 11 by a pin. The pin is fixed to the base 11 by welding, ensuring that the traction hook can rotate around the pin, facilitating connection with in-plant traction equipment (such as forklifts or tractors) and enabling rapid movement of the trolley.

[0056] In practical use, the operator pulls the trolley to the production line using a towing hook. The pneumatic spring 40 of the layer frame 20 is opened, and the layer frame 20 is rotated to a suitable angle. The automotive front floor reinforcement plate workpiece is placed in the groove 31 of the receiving block 30, where the anti-slip texture ensures the workpiece's stability. After loading, the layer frame 20 is lowered, and the pneumatic spring 40 retracts, restoring the layer frame 20 to a horizontal state. Then, a second layer of workpieces is placed on the layer frame 20. In this invention, the layer frame 20 is not limited to one layer; multiple layers of layer frames 20 can be set within the trolley body 10 to save space. The trolley is smoothly transported to the installation position via shock-absorbing casters 14. The operator rotates the layer frame 20 again to remove the workpiece for installation. The entire process requires no additional tools, is easy to operate, and the trolley is reusable, making it suitable for various in-plant logistics scenarios.

[0057] Components not described in detail in this utility model are all conventional components well known to those skilled in the art. The scope of protection of this utility model is not limited to the specific embodiments described above. Any equivalent substitutions or improvements based on the technical solution of this utility model should be included within the scope of protection of this utility model.

[0058] Preferably, the layer frame 20 is made of aluminum alloy square tube welded together, and the layer frame 20 is provided with several positioning holes;

[0059] The main advantages of aluminum alloy square tubing as a structural material include:

[0060] 1. Lightweight and high strength: Aluminum alloy has a much lower density than steel. Using aluminum alloy square tubes can significantly reduce the overall weight of the trolley while ensuring structural strength. This is beneficial to improving the trolley's mobility and load-bearing efficiency, and also reduces the labor intensity of manual handling or traction.

[0061] 2. Good corrosion resistance: A dense oxide film naturally forms on the surface of aluminum alloy, which has good corrosion resistance. It is not easy to rust even in humid environments or in the presence of some chemicals, thus extending the service life of the trolley.

[0062] 3. Good processing performance: Aluminum alloys are easy to cut, drill, bend, and weld and connect, which makes the manufacturing process more convenient and efficient.

[0063] 4. Good aesthetics: The aluminum alloy surface is smooth and flat, and it is easy to carry out surface treatment, such as anodizing and spraying, which can obtain various colors and appearances, enhancing the overall aesthetics of the trolley.

[0064] 5. High recycling value: Aluminum alloy is a recyclable material with high recycling value, which meets the requirements of sustainable development.

[0065] The receiving block 30 is a right-angled trapezoidal structure made of polyurethane. The right-angled side of the trapezoid (i.e., the right angle formed by one long side of the base and the height) contacts the upper surface of the frame 20 to ensure stable installation. The receiving block 30 has a hollow interior design, with a wall thickness of 5 mm formed by injection molding, reducing weight while maintaining structural strength.

[0066] In this embodiment, the receiving block 30 for fixing the logistics workpiece specifically includes a first receiving block 32 and a second receiving block 33.

[0067] The first receiving block 32 is connected to the upper end face of the layer frame 20. The groove 31 of the first receiving block 32 is shaped and sized to fit the bottom contour of the workpiece, and the opening of the groove 31 is set upward. When the workpiece is placed, its bottom can fall into and fit into the groove 31 of the first receiving block 32, providing primary support and vertical positioning.

[0068] Several second receiving blocks 33 are connected to the crossbeam 13 near the hinge point between the layer frame 20 and the column 12. The groove 31 of the second receiving block 33 is shaped to fit the side profile of the workpiece, and the opening of the groove 31 faces the inside of the trolley body 10. When the workpiece is placed in position, its side can be engaged or fitted by the groove 31 of the second receiving block 33, providing lateral restraint and support, and preventing the workpiece from moving laterally or tilting during transportation.

[0069] In this embodiment, as shown in Figures 2, 4, and 6, the first receiving block 32 is composed of continuous right-angled trapezoidal receiving blocks, with a groove 31 between each right-angled trapezoid. The second receiving block 33 is composed of continuous rectangles, with a groove 31 between each rectangle. More specifically, each right-angled trapezoidal and rectangular receiving block 30 has a hollow structure and has threaded holes or countersunk holes.

[0070] In a preferred embodiment, the column 12 further includes a support block 15.

[0071] Support blocks 15 are symmetrically arranged on the column 12, and support blocks 15 are used to support the other end of the layer frame 20.

[0072] The support blocks 15 are also made of aluminum alloy square tubing welded to the columns 12. Each support block 15 includes a horizontal support surface and a vertical connecting surface. The support blocks 15 are symmetrically arranged on the columns 12 of the trolley body 10, specifically located on the inner side of the column 12 opposite to the hinged end of the layer frame 20. One support block 15 is fixed on each column 12. The horizontal support surface of the support block 15 faces the layer frame 20 and is used to support the other end of the layer frame 20. When the layer frame 20 is in a horizontal position, the bottom of the layer frame 20 contacts the horizontal support surface, forming a stable support. Optionally, a rubber pad is provided on the top of the horizontal support surface. The rubber pad is fixed by adhesive to increase friction and prevent the layer frame 20 from sliding, while protecting the surface of the layer frame 20 from wear.

[0073] Preferably, the surface of the groove 31 is provided with anti-slip texture.

[0074] The receiving block 30 is made of polyurethane material and formed into a right-angled trapezoidal structure through injection molding. A rectangular groove 31 is provided on the top surface of the receiving block 30 for fixing the automotive front floor reinforcement plate workpiece. The inner surface of the groove 31 has an anti-slip texture, which adopts a cross-grid pattern and is directly formed onto the surface of the groove 31 through a mold-pressing process. The grid pattern consists of multiple straight stripes that intersect along the length and width of the groove 31, forming a diamond-shaped grid structure. The stripe surface is slightly raised to increase friction with the edge of the workpiece. The grid pattern of the anti-slip texture is evenly distributed on the bottom surface and sidewalls of the groove 31, ensuring that the workpiece fits tightly against the groove 31 during transportation, preventing slippage or displacement.

[0075] Preferably, it also includes a top cover 16.

[0076] The top cover 16 is a rectangular frame structure. One end of the top cover 16 is hinged to the column 12 and located on the top of the trolley body 10. It is also equipped with a pneumatic spring 40 connected to the crossbeam 13.

[0077] The top cover 16 is a rectangular frame structure, made of welded aluminum alloy square tubing with an oxidized surface forming a smooth, silver-gray coating that is both aesthetically pleasing and corrosion-resistant. The frame of the top cover 16 consists of multiple square tubing, forming a closed rectangular outline, with multiple support beams welded internally to enhance structural rigidity. One end of the top cover 16 is connected to the top of a column 12 of the trolley body 10 via two stainless steel hinges. The hinge's fixing wings are secured to the outer surface of the column and the bottom of the top cover 16 frame with M8 hex bolts, ensuring that the top cover 16 can rotate around the hinge axis, with a maximum opening angle of 90 degrees. The top cover 16 is connected to the crossbeam 13 of the trolley body 10 via a pair of pneumatic springs 40. Each pneumatic spring 40 has a stainless steel shell and is filled with high-pressure nitrogen to provide stable support. One end of the pneumatic spring 40 is fixed to the inner side of the crossbeam 13 by a steel pin with a diameter of 10 mm. The pin is connected to the crossbeam 13 by a bearing sleeve to ensure flexible rotation. The other end is fixed to the bottom of the top cover 16 frame by a ball joint. The joint is connected to the top cover 16 by an M6 bolt, allowing free movement at a certain angle.

[0078] Optionally, the top cover 16 can be magnetically attached to the trolley body 10 via a magnetic attraction mechanism. The magnetic attraction mechanism includes multiple magnets mounted on the bottom of the top cover 16 frame and iron adsorption components fixed to the support block 15. The magnets are embedded in pre-drilled slots in the top cover 16 frame and fixed with epoxy resin adhesive. When the top cover 16 is closed, the magnets and adsorption components are tightly attracted, forming a stable closed state. The operator can directly open the top cover 16 by pulling force without additional locking mechanisms. This magnetic connection method simplifies the structure and is suitable for rapid operation scenarios involving light-load trolleys.

[0079] Optionally in this embodiment, anti-collision strips are provided on the outer sides of the trolley body 10. The anti-collision strips are strip-shaped rubber structures and are fixed to the outer surfaces of the uprights 12 and crossbeams 13 of the trolley body 10 by bolts.

[0080] Optionally, the traction mechanism 50 is located at the front end of the trolley body 10, and the traction mechanism 50 is connected to the trolley body 10 via a pin 51.

[0081] The traction mechanism 50 includes a traction hook, located at the center of the crossbeam 13 at the front or rear bottom of the trolley body 10. The traction hook is made of high-strength carbon steel through hot forging, has a U-shaped structure, and is galvanized to form a smooth, rust-proof layer, enhancing weather resistance. The U-shaped opening faces forward, and its width is adapted to the factory's standard traction ring. A circular through-hole is machined at the bottom of the traction hook, which is connected to the crossbeam 13 via a steel pin 51. The pin 51 is coated with grease to reduce rotational friction, ensuring the traction hook can rotate flexibly around the pin 51, facilitating quick connection or disconnection with the traction ring of traction equipment (such as a forklift or tractor). Reinforcing ribs are welded to the base of the traction hook to enhance the strength of the stress points, making it suitable for bearing the traction force of a heavy-duty trolley. The traction hook's centrally located design ensures the trolley remains balanced during traction, preventing deflection. The traction mechanism 50 can be connected to the trolley body 10 via a hinge mechanism. The hinge mechanism includes a steel hinge seat and a movable hook. The hinge seat is bolted to the center of the crossbeam 13, and the hook is connected to the hinge seat via a hinge shaft, with the shaft end secured by a snap ring. The traction mechanism 50 has a spring-loaded latch at its end for quick engagement of the traction ring. This hinge connection allows the hook to rotate vertically, facilitating its storage in non-traction states, reducing space requirements, and making it suitable for space-constrained factory environments.

[0082] As shown in Figure 7, threaded holes are provided at the corresponding mounting positions on the base 11. The connecting parts on the top of the shock-absorbing caster 14 have matching threads, which can be screwed into the threaded holes to complete the fixation. Each shock-absorbing caster 14 includes a wheel body 141 and a built-in shock-absorbing mechanism 142. The shock-absorbing mechanism 142 is located between the wheel body 141 and the connection part of the base 11. When the trolley moves on uneven ground, the shock-absorbing mechanism 142 can absorb and buffer the vibration and impact force transmitted from the ground, reduce the impact on the trolley body 10 and the workpiece carried on it, and ensure the smooth operation of the trolley.

[0083] Preferably, each of the multiple columns 12 is provided with a positioning part 17 at its top end, and a stacking positioning foot 101 is provided at the bottom end of the column 12. The stacking positioning foot 101 is a rectangular block structure, and a positioning groove 102 is provided at the center of the bottom of the stacking positioning foot 101.

[0084] When multiple trolleys are stacked, the positioning part 17 of the next trolley is embedded in the positioning groove 102 of the stacking positioning foot 101 of the previous trolley.

[0085] In summary, the logistics trolley described in this utility model achieves a compact structure, convenient operation, and stable transportation performance through the optimized design of the trolley body, layer frame, receiving block, pneumatic spring, traction mechanism, top cover, shock-absorbing casters, stacking positioning structure, and shock absorption mechanism. The rectangular frame structure of the trolley body combined with the lightweight design of the aluminum alloy layer frame reduces the weight of the trolley and facilitates movement; the polyurethane material and anti-slip grooves of the receiving block ensure workpiece fixation; the support block and pneumatic spring better stabilize the layer frame and facilitate operation; the precise configuration of the traction hook and shock-absorbing casters ensures efficient and stable transportation within the factory; and the interlocking design of the stacking positioning structure optimizes the utilization rate of storage space.

[0086] The working principle of the logistics trolley described in this utility model is as follows:

[0087] The main body of the logistics trolley is constructed from a base, multiple uprights, and multiple crossbeams welded together to form a stable rectangular frame structure, providing support for the shelves and workpieces. The shelves are connected to one side of the uprights via hinges, allowing rotation around the hinge axis. A pneumatic spring connects the bottom of the shelf to the crossbeams, providing support for the shelf's rotation through telescopic movement, enabling the shelf to switch between horizontal and inclined positions. Support blocks are fixed to the shelf, their rectangular grooves fitting the edges of the workpieces. Anti-slip textures within the grooves increase friction, ensuring the workpiece's stability during transport. Support blocks are symmetrically positioned on opposite uprights, supporting the other end of the shelf and maintaining its stability in a horizontal position. A traction hook is mounted to the crossbeam at the front of the trolley body via a pin, connecting to external traction equipment. Rotating the pin enables flexible traction, driving the trolley to move along the factory floor. Shock-absorbing casters are installed at the bottom of the trolley body; the wheels absorb ground vibrations through a shock-absorbing mechanism, ensuring smooth movement. The top cover is connected to the top of the trolley body via hinges and pneumatic springs, allowing it to be opened and closed to protect the internal workpieces. The stacking positioning feet and positioning parts achieve precise alignment and stable stacking structure through the engagement of grooves and pins during trolley stacking.

[0088] The trolley features an internal shelf frame, one end of which is hinged to a column on the trolley body, allowing the frame to rotate around the hinge point. Multiple pneumatic springs are symmetrically mounted on the left and right sides of the trolley body, including at least one pair to assist in rotating the shelf frame. These springs connect the trolley body and the bottom of the shelf frame, providing assistance and support for rotation through their extension and retraction. This allows operators to easily raise or lower the shelf frame, improving the convenience and efficiency of loading and unloading workpieces.

[0089] When loading workpieces, the operator can flip the shelf frames to a suitable angle and then place the workpieces into the receiving positions within the trolley body. Multiple receiving blocks are respectively installed on the base, shelf frames, and crossbeams of the trolley body. These receiving blocks have grooves that conform to the shape of the workpiece edges. The area between the base and the shelf frames forms the first layer, and the area between the shelf frames and the top cover forms the second layer.

[0090] When the workpiece is placed, its corresponding parts will fit into the grooves of these receiving blocks, thereby achieving stable support and reliable fixation of the workpiece and preventing displacement or damage to the workpiece during movement.

[0091] After loading is complete, the operator resets the top cover. The trolley can be moved to the target location manually by pushing or pulling. Shock-absorbing casters absorb ground vibrations during movement, keeping the trolley stable. At the target location, the operator first lifts the top cover to remove the workpiece from the shelf frame, then lifts the shelf frame to remove the workpiece from the base for subsequent operations. The entire process requires no additional complex tools and is simple and quick to operate.

[0092] 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 logistics trolley, characterized in that, include: The trolley body includes a base, multiple vertical columns at the four corners of the base, and multiple crossbeams between the columns. The base has multiple shock-absorbing casters at its bottom. A layer frame is located within the trolley body, with one end hinged to the columns. Multiple support blocks are respectively disposed on the base, layer frame, and crossbeams, each with a groove adapted to the shape of the workpiece edge. Multiple pneumatic springs are included, at least one pair assisting in the rotation of the layer frame. One end of each pneumatic spring is connected to the trolley body via a pivot, and the other end has a movable connection to the bottom of the layer frame. Another pair of pneumatic springs is symmetrically installed on the left and right sides of the trolley body.

2. A logistics trolley according to claim 1, characterized in that, The receiving block includes a first receiving block and a second receiving block. The first receiving block is connected to the upper end face of the layer frame. Several second receiving blocks are connected to the crossbeam near the hinge point between the layer frame and the column. The groove of the first receiving block is adapted to the bottom of the workpiece, and the opening of the groove faces upward. The groove of the second receiving block is adapted to the side of the workpiece, and the opening of the groove faces into the trolley body. When the workpiece is installed, the bottom of the workpiece is adapted to the groove of the first receiving block, and the side of the workpiece is adapted to the groove of the second receiving block.

3. A logistics trolley according to claim 1, characterized in that, The groove surface is provided with anti-slip texture.

4. A logistics trolley according to claim 2, characterized in that, Both the first and second receiving blocks have a hollow design.

5. A logistics trolley according to claim 1, characterized in that, It also includes a top cover, which is a rectangular frame structure. One end of the top cover is hinged to the column and located on the top of the trolley body, and is provided with a pneumatic spring connected to the crossbeam.

6. A logistics trolley according to claim 1, characterized in that, It also includes several support blocks, which are symmetrically arranged on the column. One pair of support blocks is used to support the other end of the layer frame, and another pair of support blocks is used to support the top cover.

7. A logistics trolley according to claim 1, characterized in that, The shock-absorbing caster is installed at the bottom of the trolley body and is threadedly connected to the base. The shock-absorbing caster includes a wheel body and a shock-absorbing mechanism, which is located between the wheel body and the base.

8. A logistics trolley according to claim 1, characterized in that, Each of the columns has a positioning part at its top and a stacking positioning foot at its bottom. The stacking positioning foot is a rectangular block structure and has a positioning groove at the center of its bottom. When multiple trolleys are stacked, the positioning part of the next trolley is embedded in the positioning groove of the stacking positioning foot of the previous trolley.

9. A logistics trolley according to claim 1, characterized in that, It also includes a traction mechanism, which is located at both ends of the trolley body and is connected to the trolley body via pins.

10. A logistics trolley according to claim 1, characterized in that, The support block is made of polyurethane material.

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