Electric folding trolley

Abstract

The invention relates to the technical field of loading and conveying, in particular to an electric folding trolley which comprises a telescopic bottom trolley frame, and the telescopic bottom trolley frame comprises a first bottom support, a second bottom support and an embedded transverse adjusting supporting rod. According to the electric folding trolley, the first folding type overturning support on the upper surface of the first bottom support and the second folding type overturning support at the upper end of the second bottom support are stretched and limited in an electric control folding and overturning mode, and a lateral limiting mechanism can be formed on the two sides of the trolley; therefore, the lateral stability of loaded goods is greatly improved; in addition, the foldable turnover supports on the two sides can be assembled with the combined storage box to form a whole, the assembling stability is improved, objects with small sizes can be contained, and the loading mode and range are more diversified.

Description

Technical Field

[0001] The invention relates to the technical field of loading and conveying, in particular to an electric folding trolley. Background Art

[0002] As a short-distance, human-powered transport tool, handcarts are ideal for handling light cargo in confined spaces inaccessible to traditional motor vehicles, reducing labor burden and improving efficiency. Traditional handcarts have a simple structure, loading cargo solely through a support plate at the bottom. The cargo's stability relies solely on friction at the bottom, resulting in very limited lateral restraint performance. Furthermore, if the lateral restraint mechanism is fixed at the top for a long period of time, it can lead to inconvenient storage and severe loading restrictions, making it very inconvenient to use. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the traditional trolley has a simple structure, very limited lateral limiting performance, and is very inconvenient to store and use.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an electric folding trolley, including a retractable bottom frame, the retractable bottom frame includes a first bottom bracket, a second bottom bracket and an embedded lateral adjustment support rod, the upper surface of the first bottom bracket is hingedly connected to a first foldable flip bracket, the upper end of the second bottom bracket is hingedly connected to a second foldable flip bracket, and a combined storage box for storing goods is arranged between the first foldable flip bracket and the second foldable flip bracket.

[0005] The cylinder section of the embedded lateral adjustment support rod is staggered and fixed inside the first bottom bracket and the second bottom bracket, and the extended section of the embedded lateral adjustment rod is inserted into the first bottom bracket and the second bottom bracket of the adjustment end and fixedly connected to the first bottom bracket and the second bottom bracket.

[0006] An upwardly protruding top boss is provided at the upper end of the second bottom bracket, and the lower end of the second foldable flip bracket is hingedly connected to the upper surface of the top boss.

[0007] The first foldable flip bracket and the second foldable flip bracket are both composed of a bottom flip grille frame with an opening at the upper end, an upper telescopic grille frame with an opening at the lower end and an electrically controlled folding limit rod. Both sides of the first bottom bracket and the second bottom bracket are provided with strip limit grooves that cooperate with the electrically controlled folding limit rod.

[0008] The bottom flip grille frame and the upper telescopic grille frame have side guide grooves on one side of their contact surface, and side guide blocks on the other side of their contact surface. The bottom flip grille frame and the upper telescopic grille frame are inserted into the side guide grooves and slide together through the side guide blocks.

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

[0010] The strip-shaped flipping groove is internally movably equipped with a flip locking arm, an electric control screw, an internal thread extrusion slider threadedly sleeved on the electric control screw, and a reset spring for controlling the flip locking arm.

[0011] The combined storage box is composed of a plurality of independent storage box bodies, and side limit slots that cooperate with the flip locking arms are opened on both side walls of the storage box body. The flip locking arms are flipped and snapped into the side limit slots to be fixedly connected to the bottom flip grille frame and the upper telescopic grille frame.

[0012] The upper end of the outer side surface of the upper telescopic grille frame is fixedly equipped with a transverse adjustment rail that cooperates with the electric-controlled folding limit rod, and the interior of the transverse adjustment rail is elastically slidably equipped with an internal guide slider for connecting to the electric-controlled folding limit rod.

[0013] The electrically controlled folding limit rod comprises an X-shaped flip link axially mounted on the outer side of the bottom flip grille frame and a side adjustment support rod for controlling the adjustment of the flip link.

[0014] The beneficial effects of the present invention are: (1) The electric folding trolley of the present invention uses an electrically controlled folding and flipping method to extend and limit the first folding flip bracket on the upper surface of the first bottom bracket and the second folding flip bracket on the upper end of the second bottom bracket, thereby forming a lateral limiting mechanism on both sides of the trolley, thereby greatly improving the lateral stability of the loaded goods; (2) The foldable flip brackets on both sides can also be assembled with the combined storage box to form a whole, thereby improving the assembly stability and enabling it to be loaded with smaller items, with more diverse loading methods and ranges; (3) The electric folding limit rod can not only adjust the height of the upper telescopic grille frame, but also insert the bar limit groove to limit the bottom flip grille frame, thereby improving the lateral support limit stability; (4) The first bottom bracket and the second bottom bracket are separated by an embedded lateral adjustment rod to adjust the distance between them. The support surface can be adjusted as needed, greatly reducing the space occupied when storing. (5) A top boss for connecting the second foldable flip bracket is provided at the upper end of the second bottom 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 grille frame and the upper telescopic grille frame, which can not only lock and fix the combined storage box, but also lock and limit other compatible loads, greatly improving stability; (7) The bottom flip grille frame and the upper telescopic grille frame are assembled by sliding through an offset sliding installation method, which is convenient for storage and expansion and improves the adjustment stability. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0019] Figure 4 It is a schematic diagram of the internal structure of the strip-shaped turnover groove in the present invention.

[0020] Figure 5 It is a schematic diagram of the internal structure of the transverse adjustment guide rail in the present invention.

[0021] Figure 6 It is a structural schematic diagram of the storage box in the present invention. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

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

[0025] Adjustment principle: When storing, first disassemble the combined storage box 6, then fold down and flip the first foldable flip bracket 4 and the second foldable flip bracket 5 so that they fit on the first bottom bracket 1 and the second bottom bracket 2, and then use the embedded lateral adjustment rod 3 to shorten and retract the gap between the first bottom bracket 1 and the second bottom bracket 2 to narrow the entire vehicle body; When unfolding, the embedded lateral adjustment strut 3 is first used to expand the gap between the first bottom bracket 1 and the second bottom bracket 2 by stretching, so that the vehicle body becomes wider, and then the first foldable flip bracket 4 and the second foldable flip bracket 5 are flipped upward, and then the height of the first foldable flip bracket 4 and the second foldable flip bracket 5 are adjusted according to the installation height of the combined storage box 6, and then the first foldable flip bracket 4 and the second foldable flip bracket 5 are fixed to both sides of the combined storage box 6.

[0026] In order to cooperate with the translation adjustment and change the bottom support area as needed, the cylinder section of the embedded lateral adjustment strut 3 is staggered and fixed inside the first bottom bracket 1 and the second bottom bracket 2, and the protruding section of the embedded lateral adjustment rod 3 is inserted into the first bottom bracket 1 and the second bottom bracket 2 at the adjustment end and 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 telescoping, thereby changing the overall width of the entire trolley.

[0028] In order to cooperate with the staggered 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 foldable flip bracket 5 is hinged to the upper surface of the top boss 7.

[0029] By designing the top boss 7 , the second foldable flip bracket 5 can be stacked on the upper end of the first foldable flip bracket 4 so that they will not interfere with each other in the stored state.

[0030] The top boss 7 is connected to the second bottom bracket 2 via an adjusting bolt. The height of the top boss 7 can be adjusted via the adjusting bolt, thereby facilitating adjustment according to needs.

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

[0032] In order to cooperate with the electric control adjustment of lifting and lowering after flipping, and use the bottom to limit the angle and maintain lateral stability, the first folding flip bracket 4 and the second folding flip bracket 5 are both composed of a bottom flip grille frame 8 with an opening at the upper end, an upper telescopic grille frame 9 with an opening at the lower end and an electric folding limit rod 10. Both sides of the first bottom bracket 1 and the second bottom bracket 2 are provided with strip limit grooves 11 that cooperate with the electric folding limit rod 10.

[0033] In the stowed state, the first foldable flip bracket 4 and the second foldable flip bracket 5 are folded and flipped downward to fit on the retractable bottom frame; In the unfolded state, the first foldable flip bracket 4 and the second foldable flip bracket 5 are folded and flipped downward to be perpendicular to the retractable bottom frame, and then the electrically controlled folding limit rod 10 is started to control the lifting height of the upper retractable grille frame 9. At the same time, the bottom of the electrically controlled folding limit rod 10 is inserted into the strip limit groove 11 for limiting.

[0034] In order to improve the guidance during the adjustment process, a side guide groove 12 is provided on one side of the contact surface of the bottom flip 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 grille frame 8 and the upper telescopic grille frame 9. The bottom flip grille frame 8 and the upper telescopic grille frame 9 are inserted into the side guide groove 12 through the side guide block 13 to slide together.

[0035] The bottom flip grille frame 8 and the upper telescopic grille frame 9 are slidably guided and adjusted.

[0036] In order to cooperate with the lateral turning limit, a plurality of strip-shaped turning grooves 14 are opened on the surface of the bottom turning grille frame 8 and the upper telescopic grille frame 9 adjacent to the combined storage box 6.

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

[0038] In order to cooperate with the electric control flip adjustment, the strip flip groove 14 is movably equipped with a flip locking arm 15, an electric control screw 16, an internal threaded extrusion slider 17 threadedly sleeved on the electric control screw 16, and a reset spring 18 for controlling the flip locking arm 15.

[0039] The electric control screw 16 controls the internal thread extrusion slider 17 to rise and fall along the inside of the strip flip groove 14 by rotating, and then the internal thread extrusion slider 17 squeezes the flip locking arm 15 from one side to flip it toward the outside of the strip flip groove 14, thereby limiting the outside of the combined storage box 6, thereby firmly fixing the bottom flip grille frame 8 and the upper telescopic grille frame 9 to the two sides of the combined storage box 6.

[0040] In order to facilitate assembly, the combined storage box 6 is composed of a plurality of independent storage box bodies. Side limit slots 19 that cooperate with the flip locking arms 15 are provided on both side walls of the storage box bodies. The flip locking arms 15 are flipped and snapped into the side limit slots 19 to be fixedly connected to the bottom flip grille frame 8 and the upper telescopic grille frame 9.

[0041] The assembly surface of the storage box is limited by positioning pins, and different quantities of assembly can be performed as needed. Then a loading and unloading port is set at the upper end of the storage box to facilitate the removal of items. An electric lifting plate is set on the bottom surface of the storage box to facilitate the lifting of low-level loads. The lifting method can be through a side-mounted screw rod with an internal thread lifting block, or through a winch to control the retraction and extension of the lifting cable.

[0042] In order to cooperate with the top extrusion guide, the upper end of the outer side of the upper telescopic grille frame 9 is fixedly equipped with a horizontal adjustment guide rail 20 that cooperates with the electric folding limit rod 10, and the internal elastic sliding assembly of the horizontal adjustment guide rail 20 is used to connect the electric folding limit rod 10.

[0043] The electric-controlled folding limit rod 10 is flipped through electric-controlled adjustment, driving the internal guide slider 21 connected to its top to slide and adjust inside the horizontal adjustment guide rail 20, thereby ensuring the adjustment stability of the upper telescopic grille frame 9 through sliding adjustment.

[0044] In order to cooperate with the electric control flip adjustment, the electric control folding limit rod 10 includes an X-shaped flip link 101 axially mounted on the outer side of the bottom flip grille frame 8 and a side adjustment support rod 102 for controlling the adjustment of the flip link 101.

[0045] The flip link 101 is controlled to flip by extending and retracting the lateral adjustment strut 102 , thereby changing the angle of the flip link 101 .

[0046] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. An electric folding trolley comprising a retractable bottom frame, characterized by: The telescopic bottom frame comprises a first bottom bracket (1), a second bottom bracket (2) and an embedded transverse adjustment support rod (3); the upper surface of the first bottom bracket (1) is hingedly connected to a first foldable flip bracket (4); the upper end of the second bottom bracket (2) is hingedly connected to a second foldable flip bracket (5); and a combined storage box (6) for storing goods is provided between the first foldable flip bracket (4) and the second foldable flip bracket (5).

2. The electric folding trolley according to claim 1, characterized in that: The cylinder section of the embedded transverse adjustment support rod (3) is staggered and fixed inside the first bottom bracket (1) and the second bottom bracket (2), and the extended section of the embedded transverse adjustment rod (3) is inserted into the first bottom bracket (1) and the second bottom bracket (2) at the adjustment end and fixedly connected to the first bottom bracket (1) and the second bottom bracket (2).

3. The electric folding trolley according to claim 1, characterized in that: An upwardly protruding top boss (7) is provided at the upper end of the second bottom bracket (2), and the lower end of the second foldable flip bracket (5) is hingedly connected to the upper surface of the top boss (7).

4. The electric folding trolley according to claim 1, characterized in that: The first foldable flip bracket (4) and the second foldable flip bracket (5) are both composed of a bottom flip grille frame (8) with an opening at the upper end, an upper telescopic grille frame (9) with an opening at the lower end, and an electrically controlled folding limit rod (10). Both sides of the first bottom bracket (1) and the second bottom bracket (2) are provided with strip limit grooves (11) that match the electrically controlled folding limit rod (10).

5. The electric folding trolley according to claim 4, characterized in that: A side guide groove (12) is provided on one side of the contact surface of the bottom flip 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 grille frame (8) and the upper telescopic grille frame (9). The bottom flip grille frame (8) and the upper telescopic grille frame (9) are inserted into the side guide groove (12) through the side guide block (13) to slide together.

6. The electric folding trolley according to claim 4, characterized in that: The bottom flip grille frame (8) and the upper telescopic grille frame (9) are provided with a plurality of strip-shaped flip grooves (14) on the surface adjacent to the combined storage box (6).

7. The electric folding trolley according to claim 6, characterized in that: The strip-shaped flip groove (14) is internally movably equipped with a flip locking arm (15), an electric control screw (16), an internal thread extrusion slider (17) threadedly sleeved on the electric control screw (16), and a reset spring (18) for controlling the flip locking arm (15).

8. The electric folding trolley according to claim 1, characterized in that: The combined storage box (6) is composed of a plurality of independent storage box bodies. Side limit slots (19) that cooperate with the flip locking arms (15) are provided on both side walls of the storage box body (6). The flip locking arms (15) are fixedly connected to the bottom flip grille frame (8) and the upper telescopic grille frame (9) by flipping and snapping into the inside of the side limit slots (19).

9. The electric folding trolley according to claim 4, characterized in that: A transverse adjustment guide rail (20) that cooperates with the electrically controlled folding limit rod (10) is fixedly mounted on the upper end of the outer surface of the upper telescopic grille frame (9), and an internal guide slider (21) for connecting to the electrically controlled folding limit rod (10) is elastically slidably mounted inside the transverse adjustment guide rail (20).

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

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