An electric folding handcart

Abstract

This invention relates to the field of loading and conveying technology, and in particular to an electric folding handcart, comprising a retractable bottom frame, which includes a first bottom support, a second bottom support, and an embedded lateral adjustment strut. The electric folding handcart of this invention uses an electrically controlled folding and flipping mechanism to extend and limit the first folding flipping support on the upper surface of the first bottom support and the second folding flipping support at the upper end of the second bottom support. This forms a lateral limiting mechanism on both sides of the handcart, thereby greatly improving the lateral stability of the loaded goods. The folding flipping supports on both sides can also be assembled with a modular storage box to form a whole, improving assembly stability and allowing for the loading of smaller items, thus offering greater versatility in loading methods and scope.

Description

Technical Field

[0001] This invention relates to the field of loading and conveying technology, and in particular to an electric folding handcart. Background Technology

[0002] Handcarts, as short-distance manual transport tools, are well-suited for narrow spaces inaccessible to traditional motor vehicles. They can move lighter goods, reducing manpower and improving efficiency. Traditional handcarts have a simple structure, relying solely on a bottom support plate to load goods. The stability of the goods depends solely on bottom friction, resulting in very limited lateral restraint performance. Furthermore, the lateral restraint mechanism being fixed at the top for extended periods leads to inconvenient storage and limited loading options, making them very inconvenient to use. Summary of the Invention

[0003] The technical problem to be solved by this invention is that traditional handcarts have a simple structure, very limited lateral limiting performance, and are inconvenient to store and use.

[0004] The technical solution adopted by the present invention to solve its technical problem is: an electric folding handcart, including a retractable bottom frame, the retractable bottom frame including a first bottom support, a second bottom support and an embedded lateral adjustment strut, a first folding flip support is hinged to the upper surface of the first bottom support, a second folding flip support is hinged to the upper end of the second bottom support, and a combined storage box for storing goods is provided between the first folding flip support and the second folding flip support.

[0005] The cylinder section of the embedded lateral adjustment strut is misaligned and fixed inside the first bottom bracket and the second bottom bracket, and the protruding section of the embedded lateral adjustment rod is inserted into the first bottom bracket and the second bottom bracket at the adjustment end and the first bottom bracket and the second bottom bracket are fixedly connected.

[0006] The second bottom bracket has an upwardly protruding top boss at its upper end, and the lower end of the second folding and flipping bracket is hinged to the upper surface of the top boss.

[0007] Both the first folding and flipping bracket and the second folding and flipping bracket are composed of a bottom flipping grid frame with an opening at the top, an upper telescopic grid frame with an opening at the bottom, and an electrically controlled folding limiting rod. Both sides of the first bottom bracket and the second bottom bracket are provided with strip-shaped limiting grooves that cooperate with the electrically controlled folding limiting rod.

[0008] The bottom flip-up grille frame and the upper telescopic grille frame are provided with side guide grooves on one side of their contact surfaces, and side guide blocks are provided on the other side of their contact surfaces. The bottom flip-up grille frame and the upper telescopic grille frame slide together by inserting the side guide blocks into the side guide grooves.

[0009] The bottom flip-up grille frame and the upper telescopic grille frame are provided with a plurality of strip flip-up grooves on the surface of the combined storage box.

[0010] The strip-shaped flip groove is internally fitted with a flip locking arm, an electric control screw, an internally threaded extrusion slider threaded onto the electric control screw, and a reset spring for controlling the flip locking arm.

[0011] The modular storage box is composed of a plurality of independent storage boxes. The side walls of the storage boxes are provided with lateral limiting slots that cooperate with the flip locking arms. The flip locking arms are fixedly connected to the bottom flip grid frame and the upper telescopic grid frame by flipping and locking into the lateral limiting slots.

[0012] The upper outer surface of the upper telescopic grid frame is fixedly equipped with a horizontal adjustment rail that cooperates with the electrically controlled folding limit rod. The horizontal adjustment rail is elastically slidably equipped with an internal guide slider for connecting the electrically controlled folding limit rod.

[0013] The electrically controlled folding limit rod includes an X-shaped flipping link that is movably mounted on the outer side of the bottom flipping grid frame and a side-mounted adjustment support rod for controlling the adjustment of the flipping link.

[0014] The beneficial effects of this invention are: (1) An electric folding handcart of the present invention uses an electric control folding and flipping method to extend and limit the first folding flipping bracket on the upper surface of the first bottom bracket and the second folding flipping bracket at the upper end of the second bottom bracket, which can form a lateral limiting mechanism on both sides of the handcart, thereby greatly improving the lateral stability of the loaded goods. (2) The folding and flipping brackets on both sides can also be assembled with the modular storage box to form a whole, improve assembly stability, and make it possible to store smaller items, with more diverse loading methods and ranges. (3) The use of an electronically controlled folding limit rod can not only adjust the height of the upper telescopic grid frame, but also insert a strip limit groove to limit the bottom flip grid frame, thereby improving the stability of the lateral support limit. (4) The spacing between the first bottom bracket and the second bottom bracket is adjusted by an embedded horizontal adjustment strut, which can adjust the support surface as needed, greatly reducing the space occupied during storage; (5) A top protrusion is provided at the upper end of the second bottom bracket to connect the second folding flip bracket, which can be stacked and stored after the width is reduced, making the structural layout more reasonable. (6) A flip locking arm controlled by an electric screw is provided on the adjacent surfaces of the bottom flip grid frame and the upper telescopic grid frame. It can not only lock and fix the modular storage box, but also lock and limit other compatible loads, greatly improving stability. (7) The bottom flip grid frame and the upper telescopic grid frame are slidably assembled by a staggered sliding installation method, which facilitates storage and unfolding and improves adjustment stability. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a structural schematic diagram of the present invention in its assembled state.

[0017] Figure 2 This is a schematic diagram of the disassembly and assembly of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of the bottom flip-up grille frame and the upper telescopic grille frame assembly end in this invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of the strip-shaped flipping groove in this invention.

[0020] Figure 5 This is a schematic diagram of the internal structure of the horizontally adjustable guide rail in this invention.

[0021] Figure 6 This is a schematic diagram of the structure of the storage box in this invention. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6An electric folding trolley is shown, including a retractable bottom frame. The retractable bottom frame includes a first bottom support 1, a second bottom support 2, and an embedded lateral adjustment strut 3. A first folding flip support 4 is hinged to the upper surface of the first bottom support 1, and a second folding flip support 5 is hinged to the upper end of the second bottom support 2. A combined storage box 6 for storing goods is provided between the first folding flip support 4 and the second folding flip support 5.

[0025] Adjustment principle: When storing, first disassemble the combined storage box 6, then fold down and flip the first folding flip bracket 4 and the second folding flip bracket 5 so that they fit against the first bottom bracket 1 and the second bottom bracket 2. Then, use the embedded horizontal adjustment strut 3 to reduce the gap between the first bottom bracket 1 and the second bottom bracket 2 by telescopic reduction, thus narrowing the overall vehicle body. When unfolded, the embedded horizontal adjustment strut 3 is first used to expand the gap between the first bottom bracket 1 and the second bottom bracket 2 by stretching, making the vehicle body wider. Then, the first folding flip bracket 4 and the second folding flip bracket 5 are flipped upward. Then, the height of the first folding flip bracket 4 and the second folding flip bracket 5 is adjusted according to the installation height of the combined storage box 6. Then, the first folding flip bracket 4 and the second folding flip bracket 5 are fixed to both sides of the combined storage box 6.

[0026] To facilitate translational adjustment, the bottom support area is changed as needed. The cylinder section of the embedded lateral adjustment strut 3 is misaligned and fixed inside the first bottom bracket 1 and the second bottom bracket 2. The protruding section of the embedded lateral adjustment strut 3 is inserted into the first bottom bracket 1 and the second bottom bracket 2 at the adjustment end and is fixedly connected to the first bottom bracket 1 and the second bottom bracket 2.

[0027] The embedded lateral adjustment rod 3 changes the gap between the first bottom bracket 1 and the second bottom bracket 2 by extending and retracting, thereby changing the overall width of the entire handcart.

[0028] To facilitate staggered and flat stacking, the upper end of the second bottom bracket 2 is provided with an upwardly protruding top boss 7, and the lower end of the second folding and flipping bracket 5 is hinged to the upper surface of the top boss 7.

[0029] The top boss 7 design allows the second folding flip bracket 5 to be stacked on top of the first folding flip bracket 4, so that they do not interfere with each other when stored.

[0030] The top boss 7 is connected to the second bottom bracket 2 by adjusting bolts. The height of the top boss 7 can be adjusted by adjusting bolts, so as to facilitate adjustment as needed.

[0031] At the same time, by controlling the first folding flip bracket 4 and the second folding flip bracket 5 to flip outward, the support area of ​​the entire water cart can be expanded.

[0032] In order to facilitate the electric adjustment and lifting after flipping, and to use the bottom for angle limiting to maintain lateral stability, the first folding flipping bracket 4 and the second folding flipping bracket 5 are both composed of a bottom flipping grid frame 8 with an opening at the top, an upper telescopic grid frame 9 with an opening at the bottom, and an electric folding limit rod 10. Both the first bottom bracket 1 and the second bottom bracket 2 are provided with strip-shaped limit grooves 11 on both sides that cooperate with the electric folding limit rod 10.

[0033] In the folded state, the first folding flip bracket 4 and the second folding flip bracket 5 fold down and flip to fit against the retractable bottom frame. In the unfolded state, the first folding flip bracket 4 and the second folding flip bracket 5 fold down and flip to be perpendicular to the retractable bottom frame. Then, the electronically controlled folding limit rod 10 is activated to control the upper telescopic grille frame 9 to rise in height. At the same time, the bottom of the electronically controlled folding limit rod 10 is inserted into the strip-shaped limit groove 11 for limiting.

[0034] To improve guidance during the adjustment process, a side guide groove 12 is provided on one side of the contact surface of the bottom flip-up grille frame 8 and the upper telescopic grille frame 9, and a side guide block 13 is provided on the other side of the contact surface of the bottom flip-up grille frame 8 and the upper telescopic grille frame 9. The bottom flip-up grille frame 8 and the upper telescopic grille frame 9 slide together by inserting the side guide block 13 into the side guide groove 12.

[0035] The bottom flip-up grille frame 8 and the upper telescopic grille frame 9 are adjusted by sliding guidance.

[0036] To accommodate the lateral flipping limit, the bottom flipping grille frame 8 and the upper telescopic grille frame 9 are provided with a plurality of strip flipping grooves 14 on the surface of the adjacent combined storage box 6.

[0037] The bottom flip-up grille frame 8 has 12 strip flip-up slots 14, and the upper telescopic grille frame 9 has 10 strip flip-up slots 14.

[0038] To facilitate the electronically controlled flip adjustment, the strip-shaped flip groove 14 is internally fitted with a flip locking arm 15, an electronically controlled lead screw 16, an internally threaded compression slider 17 threaded onto the electronically controlled lead screw 16, and a reset spring 18 for controlling the flip locking arm 15.

[0039] The electric control screw 16 rotates to control the internal thread extrusion slider 17 to rise and fall along the inside of the strip-shaped flip groove 14. Then, the internal thread extrusion slider 17 extrudes and flips the locking arm 15 from one side to the outside of the strip-shaped flip groove 14, thereby limiting the outside of the combined storage box 6 and firmly fixing the bottom flip grid frame 8 and the upper telescopic grid frame 9 to the two sides of the combined storage box 6.

[0040] To facilitate assembly, the modular storage box 6 is composed of multiple independent storage boxes. The side walls of the storage boxes are provided with lateral limiting slots 19 that cooperate with the flip locking arm 15. The flip locking arm 15 is fixedly connected to the bottom flip grid frame 8 and the upper telescopic grid frame 9 by flipping and locking into the lateral limiting slot 19.

[0041] The assembly surface of the storage box is limited by positioning pins, and different quantities can be assembled as needed. Then, a loading and unloading port is set at the top of the storage box for easy access to items. An electrically controlled lifting plate is set on the bottom surface of the storage box to easily lift the loaded items at a lower position. The lifting can be achieved by using a side hanging screw in conjunction with an internal threaded lifting block, or by using a winch to control the raising and lowering of the hoisting cable.

[0042] To cooperate with the top extrusion guide, a horizontal adjustment guide rail 20 that cooperates with the electrically controlled folding limit rod 10 is fixedly installed on the upper outer side of the upper telescopic grid frame 9. An internal guide slider 21 for connecting the electrically controlled folding limit rod 10 is elastically slidably installed inside the horizontal adjustment guide rail 20.

[0043] The electrically controlled folding limit rod 10 flips through electrical control, causing the internal guide slider 21 connected to its top to slide and adjust inside the horizontal adjustment guide rail 20. This sliding adjustment ensures the stability of the upper telescopic grid frame 9.

[0044] To facilitate the electronically controlled flipping adjustment, the electronically controlled folding limit rod 10 includes an X-shaped flipping link 101 movably mounted on the outer side of the bottom flipping grid frame 8 and a side-mounted adjustment support rod 102 for controlling the adjustment of the flipping link 101.

[0045] The tilting link 101 is tilted by extending and retracting the side-mounted adjustable support rod 102, thereby changing the angle of the tilting link 101.

[0046] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric folding trolley, comprising a retractable bottom frame, characterized in that: The retractable bottom frame includes a first bottom bracket (1), a second bottom bracket (2) and an embedded lateral adjustment strut (3). The upper surface of the first bottom bracket (1) is hinged to a first folding flip bracket (4), and the upper end of the second bottom bracket (2) is hinged to a second folding flip bracket (5). A combined storage box (6) for storing goods is provided between the first folding flip bracket (4) and the second folding flip bracket (5). The first folding flip bracket (4) and the second folding flip bracket (5) are both composed of a bottom flip grid frame (8) with an opening at the top, an upper telescopic grid frame (9) with an opening at the bottom, and an electrically controlled folding limit rod (10). The first bottom bracket (1) and the second bottom bracket (2) are provided with strip-shaped limit grooves (11) on both sides that cooperate with the electrically controlled folding limit rod (10). The bottom flip-up grille frame (8) and the upper telescopic grille frame (9) are provided with side guide grooves (12) on one side of their contact surfaces, and side guide blocks (13) are provided on the other side of their contact surfaces. The bottom flip-up grille frame (8) and the upper telescopic grille frame (9) slide together by inserting the side guide blocks (13) into the side guide grooves (12). The bottom flip-up grille frame (8) and the upper telescopic grille frame (9) are provided with a plurality of strip flip-up grooves (14) on the surface of the combined storage box (6). The strip-shaped flip groove (14) is movably fitted with a flip locking arm (15), an electric control screw (16), an internal thread pressing slider (17) threaded onto the electric control screw (16), and a reset spring (18) for controlling the flip locking arm (15). The combined storage box (6) is composed of a plurality of independent storage boxes. The storage box (6) has lateral limiting slots (19) on both sides that cooperate with the flip locking arm (15). The flip locking arm (15) is fixedly connected to the bottom flip grid frame (8) and the upper telescopic grid frame (9) by flipping and locking into the lateral limiting slot (19). The upper outer side of the upper telescopic grid frame (9) is fixedly equipped with a horizontal adjustment rail (20) that cooperates with the electrically controlled folding limit rod (10). The horizontal adjustment rail (20) is elastically slidably equipped with an internal guide slider (21) for connecting the electrically controlled folding limit rod (10).

2. The electric folding handcart according to claim 1, characterized in that: The cylinder section of the embedded lateral adjustment strut (3) is misaligned and fixed inside the first bottom bracket (1) and the second bottom bracket (2). The protruding section of the embedded lateral adjustment strut (3) is inserted into the first bottom bracket (1) and the second bottom bracket (2) of the adjustment end and is fixedly connected to the first bottom bracket (1) and the second bottom bracket (2).

3. An electric folding handcart according to claim 1, characterized in that: The second bottom bracket (2) has an upwardly protruding top boss (7) at its upper end, and the lower end of the second folding flip bracket (5) is hinged to the upper surface of the top boss (7).

4. An electric folding handcart according to claim 1, characterized in that: The electrically controlled folding limit rod (10) includes an X-shaped flipping link (101) movably mounted on the outer side of the bottom flipping grid frame (8) and a side-mounted adjustment support rod (102) for controlling the adjustment of the flipping link (101).

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