Gathering trolley capable of not rising after being folded

Abstract

The utility model discloses a gathering trolley without rising after folding, which comprises a trolley frame, the trolley frame comprises four vertical pipes, a bottom frame, four foldable side frames and rollers at the bottoms of the vertical pipes, the bottom frame comprises two bottom frames and a connecting pipe, two end parts of the connecting pipe are respectively and movably riveted with the inner side of one bottom frame, and the connecting pipe is connected with the bottom frame. The left and right ends of the outer side of the bottom frame are movably riveted with the lower ends of the two vertical pipes respectively; each side frame is arranged between two adjacent vertical pipes, the upper end of any side is movably riveted with the top of the vertical pipe, and the lower end is longitudinally and slidably connected with the vertical pipe. The size is reduced by folding, and the folded height does not exceed the height in the using state, so that storage is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolleys, and in particular relates to a foldable trolley which does not rise after being folded. Background Art

[0002] As a transport vehicle mainly pushed and pulled by manpower, a handcart is used in some places where motor vehicles are inconvenient to use in daily life. Most general four-wheeled handcarts have a cargo platform. Since the handcart is not used all the time, some existing handcarts are designed to be foldable for easy storage when not in use. For example, a Chinese patent with publication number "CN103895672B" discloses a beach cart, including a frame, a handlebar and wheels. The frame includes a chassis, a front frame, a rear frame and two side frames. The two side frames are symmetrical structures relative to the chassis, including at least two groups of X-assemblies arranged side by side and symmetrically arranged with each other, and a plurality of hinges for connecting two adjacent X-assemblies on the same side. The X-assembly includes a first oblique beam and a second oblique beam hinged by a hinge shaft arranged in the middle of the X-assembly; one end of the first oblique beam or the second oblique beam is hinged to the first oblique beam or the second oblique beam of the adjacent X-assembly through a hinge, and the other end is hinged to the front frame or the rear frame through a lower bracket of the chassis, or is hinged to the first oblique beam or the second oblique beam of another adjacent X-assembly through a hinge. Although the beach cart is folded and gathered when stored compared to the unfolded state when in use, and the volume is reduced, the four retractable vertical legs increase the overall height after folding, which is not conducive to carrying and storage. Summary of the invention

[0003] The utility model aims to address the defects of the prior art and provides a foldable trolley which does not rise after being folded, reduces the volume when folded, and has a height after folding that does not exceed the height in the use state, which is convenient for storage.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: a gathering trolley that does not rise after being folded, including a frame, the frame including four vertical pipes, a bottom frame, four foldable side frames and rollers at the bottom of the vertical pipes, the bottom frame including two bottom frames and connecting pipes, the two ends of the connecting pipes are respectively movably riveted to the inner side of a bottom frame, and the left and right ends of the outer side of the bottom frame are respectively movably riveted to the lower ends of the two vertical pipes; a single side frame is arranged between two adjacent vertical pipes, and the upper end of either side is movably riveted to the top of the vertical pipe, and the lower end is longitudinally slidably connected to the vertical pipe.

[0005] Furthermore, the base frame also includes two hinged seats arranged at the two ends of the connecting pipe, and the inner side of any bottom frame is movably riveted to the adjacent hinged seats.

[0006] Furthermore, the bottom frame includes two bottom tubes which are distributed in an eight-shaped shape and are narrow inside and wide outside.

[0007] Furthermore, the lower end of the outer side of the hinge seat is movably riveted to the bottom tube, and a cover plate is provided at the upper end of the outer side, and the position of the cover plate corresponds to the riveted position of the bottom tube.

[0008] Furthermore, the side frame includes one or more X-shaped cross tubes that are movably riveted on the same plane, and the X-shaped cross tube includes two movably riveted side tubes.

[0009] Furthermore, the frame also includes a slider longitudinally slidably connected to the vertical tube, and the lower end of the side tube on any side of the side frame is movably riveted to the slider.

[0010] Furthermore, it also includes an upper fixing seat and a lower fixing seat installed at the two ends of the vertical pipe, the upper ends of the front and rear sides of the side frame are movably riveted to the upper fixing seat, and the left and right ends of the outer side of the bottom frame are movably riveted to a lower fixing seat respectively.

[0011] Furthermore, it also includes a pull rod, which includes a handle, a stretching rod, a pull rod seat and two side rods that are symmetrically riveted to the bottom of the pull rod seat, and the lower ends of the side rods are movably riveted to the left and right ends of the front side of the frame; the upper end of the stretching rod is provided with a handle, and the lower end is movably connected to the pull rod seat.

[0012] Furthermore, the stretching rod comprises an upper rod, an upper limit block and a lower rod, the upper rod is movably mounted on the upper limit block and the lower end extends into the lower rod, and the upper limit block is snap-connected to the upper end of the lower rod.

[0013] Furthermore, the upper end surface of the upper limit block is larger than the diameter of the through hole in the pull rod seat for the stretch rod to pass through.

[0014] Furthermore, the pull rod further comprises a lower limit block arranged at the bottom of the stretch rod, and the size of the lower end surface of the lower limit block is larger than the diameter of the through hole in the pull rod seat for the stretch rod to pass through.

[0015] Furthermore, the roller on the front side of the frame is a universal wheel with a brake.

[0016] By adopting the technical scheme of the utility model, the beneficial effects of the utility model are as follows: the bottom frame adopts a connecting tube as a central piece to cooperate with the bottom frame to achieve folding. After folding, the connecting tube and the two hinged seats are in a horizontal state, which reduces the height of the bottom frame when folded. During operation, the bottom frame can be folded by pulling the connecting tube, thereby driving the side frames to be folded; since an upper fixed seat is provided on the top of the vertical tube, the upper end of the X-shaped cross tube is restricted during folding, and the slider can only move downward, driving the two side tubes of the X-shaped cross tube to gather together, so that the height after folding does not exceed the vertical tube, and the height of the entire frame does not increase, which is more conducive to storage, carrying and transportation; the bottom frame and the side frames can be folded and folded, and the space occupied by the whole vehicle after folding is smaller than that in the unfolded state, which is convenient for storage; a stretching rod is provided on the frame, which is convenient for users to hold, push, pull and drag. The stretching rod is connected by an upper rod and a lower rod buckle, and the assembly is simple and fast. When folded, the upper rod is retracted into the lower rod to shorten the length of the entire stretching rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the first three-dimensional rolling trolley that does not rise when folded. Figure 1 ;

[0018] Figure 2 It is the first three-dimensional rolling trolley that does not rise when folded. Figure 2 ;

[0019] Figure 3 It is a side frame diagram of the first type of gathering trolley that does not rise when folded;

[0020] Figure 4 It is a schematic diagram of the pull rod;

[0021] Figure 5 It is the first folding trolley that does not rise when folded. Figure 1 ;

[0022] Figure 6 It is the first folding trolley that does not rise when folded. Figure 2 ;

[0023] Figure 7a This is a schematic diagram of the first chassis in an unfolded state;

[0024] Figure 7b This is a schematic diagram of the first chassis folding state;

[0025] Figure 8 It is a three-dimensional diagram of the second type of gathering trolley which does not rise when folded;

[0026] Figure 9a is a schematic diagram of the second chassis in an unfolded state;

[0027] Figure 9b Schematic diagram of the second chassis folding state.

[0028] In the figure: 1 bottom frame, 11 bottom tube, 12 connecting tube, 13 hinged seat, 13a cover plate, 2 side frame, 21 X-shaped cross tube, 21a side tube, 3 vertical tube, 4 slider, 5 upper fixed seat, 6 lower fixed seat, 7 pull rod, 71 handle, 72 stretching rod, 72a upper rod, 72b lower rod, 72c convex block, 72d slot, 73 pull rod seat, 74 side rod, 75 lower limit block, 76 connecting seat, 77 upper limit block, 8 roller, 81 universal wheel. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are further described in conjunction with the accompanying drawings to make the present technical solution clearer and more understandable.

[0030] Example 1

[0031] like Figure 1-7b The illustrated embodiment of a foldable trolley that does not rise after being folded comprises a frame, the frame comprising a bottom frame 1 and four foldable side frames 2, four vertical pipes 3 and rollers 8 arranged at the bottom of the vertical pipes, the bottom frame 1 comprising two bottom frames and a connecting pipe 12, the two ends of the connecting pipe 12 are respectively movably riveted to the inner side of one bottom frame. A single side frame 2 is arranged between two adjacent vertical pipes 3, and the upper end of any side is movably riveted to the top of the vertical pipe 3, and the lower end is longitudinally slidably connected to the vertical pipe 3.

[0032] In one embodiment, the base frame 1 further comprises an articulated seat 13, and each end of the connecting pipe 12 is provided with an articulated seat 13, and any base frame 11 is movably riveted to an adjacent articulated seat 13. The articulated seat 13 is an isosceles trapezoidal structure that is narrow inside and wide outside.

[0033] The bottom frame includes two bottom tubes 11 that are distributed in an eight-shaped pattern and are narrow inside and wide outside. One end of the two bottom tubes 11 is movably riveted to the left and right sides of the hinge seat 13, and the other end is movably riveted to the two vertical tubes 3 at the left and right ends of the front (or rear) side of the frame. When unfolded for use, the bottom tubes 11 are distributed in a horizontal direction, such as Figure 7a When folded and stored, the bottom tube 11 rotates downward around the riveted portion of the hinge seat 13, as Figure 7b shown.

[0034] The side frame 2 includes one or more X-shaped cross tubes 21 movably riveted on the same plane, and the X-shaped cross tube includes two movably riveted side tubes 21a; the upper end portions of both sides of each side frame 2 are movably riveted to the tops of two adjacent vertical tubes 3, and the lower end portions are longitudinally slidably connected to the vertical tubes 3. The vehicle frame 2 of this embodiment uses two or three X-shaped cross tubes 21.

[0035] The frame also includes a slider 4 which is longitudinally slidably connected to the stand pipe 3, and the lower end of any side of the side frame 2 is movably riveted to the slider.

[0036] In one embodiment, the slider 4 is directly sleeved on the riser 3 and can slide up and down. The longitudinal through hole of the slider 4 is larger than the diameter of the riser 3. The slider 4 is sleeved on the riser 3 through the longitudinal through hole and slides up and down along the riser 3.

[0037] The frame also includes an upper fixing seat 5 and a lower fixing seat 6 installed at both ends of the vertical tube 3. The upper ends of the front and rear sides of the side frame 2 are movably riveted to the upper fixing seat 5, and the left and right ends of the front and rear sides of the bottom frame 1 are movably riveted to a lower fixing seat 6. Since the upper fixing seat 5 is provided on the top of the vertical tube 3, the upper end of the X-shaped cross tube 21 is restricted when folding, and only the lower end can move downward through the slider 4, so that the height of the bottom frame will not exceed the vertical tube 3 after folding, and the height of the entire frame will not increase.

[0038] The frame also includes a pull rod 7, which includes a handle 71, a stretching rod 72, a pull rod seat 73 and two side rods 74 symmetrically riveted to the bottom of the pull rod seat 73. The lower end of the side rod 71 is movably riveted to the left and right ends of the front side of the frame, and the side rod 71 can rotate left and right around the pull rod seat 73; the upper end of the stretching rod 72 is provided with a handle 71, and the lower end is movably connected to the pull rod seat 73. The bottom of the side rod 74 is also provided with a connecting seat 76 movably riveted to the lower fixing seat 6, and the connecting seat 76 can rotate forward and backward around the lower fixing seat 6, driving the entire pull rod to rotate to fit or move away from the front side of the frame.

[0039] The stretching rod 72 includes an upper rod 72a, an upper limit block 77 and a lower rod 72b. The upper rod is movably installed in the lower rod. The upper limit block 77 movably installed on the upper rod is snap-connected with the upper end of the lower rod 72b. A lower limit block 75 is provided at the bottom of the lower rod 72b. A through hole is opened in the middle of the pull rod seat 73. The stretching rod 72 can move up and down through the through hole. The lower end surface size of the lower limit block 75 is larger than the through hole size of the pull rod seat 73, so as to prevent the lower rod 72b from being separated from the through hole of the pull rod seat 73 when moving upward.

[0040] Specifically, two protrusions 72c are symmetrically arranged on the outer side of the upper limit block 77 that is movably connected to the upper rod 72a, and two symmetrical slots 72d are arranged on the upper end of the lower rod 72b, and the protrusions 72c are embedded in the slots 72d, so as to complete the connection between the upper limit block 77 and the lower rod 72b. When the stretching rod is stretched to the maximum length, the lower end of the upper rod 72a contacts the upper limit block 77; when the stretching rod is shortened and folded, the upper rod 72a passes through the through hole in the middle of the upper limit block 77 and moves downward into the lower rod until the lower end of the upper rod 72a contacts the lower limit block 75, thereby reducing the length of the entire pull rod for easy storage.

[0041] A roller 8 is provided at the bottom of the frame, and the front roller is a universal wheel 81 with a brake.

[0042] Two protrusions 72c are provided on the upper limit block 77. The upper rod 72a passes through the through hole of the upper limit block 77 and can slide up and down. The bottom size of the upper rod 72a is larger than the through hole diameter of the upper limit block 77 to prevent the upper rod 72a from moving up and disengaging. During assembly, the upper rod 72a is placed in the lower rod 72b. The upper end surface of the upper limit block 77 is larger than the inner diameter of the lower rod 72b. The protrusion 72c of the upper limit block 77 is buckled and fixed with the card slot 72d. The upper limit block 77 limits the maximum stroke of the upper rod 72a moving up.

[0043] In one embodiment, a rectangular bag without a top surface can be provided on the frame and placed in a frame enclosed by the base frame and four side frames. The size of the rectangular bag is adapted to the shape of the frame when the frame is unfolded, and the sides of the rectangular bag are detachably connected to the frame, such as by providing a mounting mask on the outside of the side to cover the tops of the movable riveted parts of two adjacent X-shaped cross tubes 21 on the side frames.

[0044] Example 2

[0045] Different from Example 1, Figure 8-9b As shown, in the trolley of this embodiment, the bottom frame includes four bottom tubes 11, a connecting tube 12 and two hinge seats 13. One end of the bottom tube 11 is riveted to the lower end of the outer side of the hinge seat 13. A cover plate 13a is provided at the upper end of the outer side of each hinge seat 13. The position of the cover plate 13a corresponds to the riveted part of the bottom tube 11. When the bottom tube 11 moves around the hinge seat 13 until the bottom tube is in a horizontal state, the cover plate 13a covers the upper end of the bottom tube at the riveted part. In the use state, the bottom tube 11 is in a horizontal state, such as Figure 9a As shown; in the folded state, the bottom tube 11 rotates downward around the hinge seat 13. When the trolley is not in use, it is in the folded state. When the trolley needs to be used, the bottom tube 11 rotates upward from the lower side of the hinge seat 13 until it is unfolded to a horizontal state. During the rotation and opening process, the cover plate is set to block the space above the hinged part, thereby preventing fingers from being stuck in the hinged part between the bottom tube 11 and the hinge seat 13, and preventing fingers from being pinched. Since the rectangular bag is generally made of cloth such as Oxford cloth, when the rectangular bag is installed on the frame and the bottom frame is folded, it can also prevent the cloth bag from being pinched.

[0046] The cover plate 13 a and the hinge seat 13 may be integral or separate. In this embodiment, they are integrally formed, and the cover plate 13 a extends outward from the upper end of the outer side surface of the hinge seat 13 .

[0047] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A foldable trolley that does not rise after being folded, comprising a frame, wherein the frame comprises four vertical tubes, a bottom frame, four foldable side frames and rollers at the bottom of the vertical tubes, characterized in that: The bottom frame includes two bottom frames and a connecting pipe, the two ends of the connecting pipe are respectively movably riveted to the inner side of a bottom frame, and the left and right ends of the outer side of the bottom frame are respectively movably riveted to the lower ends of two vertical pipes; a single side frame is arranged between two adjacent vertical pipes, and the upper end of any side is movably riveted to the top of the vertical pipe, and the lower end is longitudinally slidably connected to the vertical pipe; The bottom frame also includes two hinged seats arranged at the two ends of the connecting pipe, and the inner side of any bottom frame is movably riveted to the adjacent hinged seats; the bottom frame includes two bottom pipes distributed in an eight-shaped pattern with narrow inside and wide outside; the lower end of the outer side of the hinged seat is movably riveted to the bottom pipe, and a cover plate is provided at the upper end of the outer side, and the position of the cover plate corresponds to the riveted position of the bottom pipe; The side frame includes one or more X-shaped cross tubes movably riveted on the same plane, and the X-shaped cross tube includes two movably riveted side tubes; The frame also includes a slider connected to the vertical pipe for longitudinal sliding, and the lower end of the side pipe on any side of the side frame is movably riveted to the slider; it also includes an upper fixed seat and a lower fixed seat installed at both ends of the vertical pipe, the upper ends of the front and rear sides of the side frame are movably riveted to the upper fixed seat, and the left and right ends of the outer side of the bottom frame are movably riveted to a lower fixed seat respectively.

2. A foldable trolley that does not rise after folding according to claim 1, characterized in that: It also includes a pull rod, which includes a handle, a stretching rod, a pull rod seat and two side rods that are symmetrically riveted to the bottom of the pull rod seat, and the lower ends of the side rods are movably riveted to the left and right ends of the front side of the frame; the upper end of the stretching rod is provided with a handle, and the lower end is movably connected to the pull rod seat.

3. A foldable trolley that does not rise after folding according to claim 2, characterized in that: The stretching rod comprises an upper rod, an upper limit block and a lower rod. The upper rod is movably mounted on the upper limit block and the lower end extends into the lower rod. The upper limit block is buckled and connected to the upper end of the lower rod.

4. The foldable trolley that does not rise after folding according to claim 1, characterized in that: The rollers on the front side of the frame are universal wheels with brakes.

Images