Volume-adjustable trolley

Abstract

The utility model discloses a capacity-adjustable handcart which comprises a handcart frame, the handcart frame comprises four vertical pipes arranged at four corners, two adjacent vertical pipes are directly provided with a folding side frame, four corners of a bottom frame are movably riveted with the lower ends of the four vertical pipes, the vertical pipes are telescopic pipes comprising upper pipes and lower pipes, and the upper pipes and the lower pipes are connected with the folding side frame. And in an unfolded state, detachable fences are arranged on the four upper pipes. By the adoption of the trolley, a user can flexibly adjust the size of the object containing space according to the number of current objects, the space for containing the objects is increased through the stretching height of the upper pipe of the telescopic pipe, and more objects can be placed and conveyed at a time; due to the detachable design of the fence, the fence can be freely detached when few articles are transported, the upper pipe is contracted into the lower pipe, and the space for placing the articles is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolleys, and in particular relates to a trolley with adjustable capacity. Background Art

[0002] The trolley uses manual pushing and pulling as power to achieve the purpose of transporting items over a short distance. Traditional trolleys such as flatbed carts and hopper carts are not foldable, so they occupy a space corresponding to the size of the trolley when stored daily. Some existing trolleys adopt a foldable design. For example, a Chinese patent with publication number "CN 218112682U" discloses a folding trolley, which includes a trolley body that is rectangular after unfolding. The trolley body includes fixed tripods independently distributed at the four corners of the trolley body, a side frame assembly and a rear frame assembly composed of V'-shaped parts, a front push handle assembly with two rotatable connecting rods, and a bottom frame assembly that can be folded and retracted upward. In this solution, the side frames and rear frames of the whole vehicle are both composed of foldable 'V'-shaped parts, and the bottom frame assembly can be folded upward when the whole vehicle is folded. This folding trolley has a fixed capacity in the unfolded state and cannot be adjusted. When transporting a small amount of items, it can be transported at one time, but when transporting more items, it can only be transported in two times, and the flexibility is relatively poor. Summary of the invention

[0003] The utility model aims to provide a capacity-adjustable trolley in view of the defects of the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: a capacity-adjustable trolley, including a frame, the frame including four vertical tubes arranged at four corners, two adjacent vertical tubes are directly provided with folding side frames, the four corners of the bottom frame are movably riveted to the lower ends of the four vertical tubes, the vertical tubes adopt telescopic tubes including upper tubes and lower tubes, and detachable enclosures are arranged on the four upper tubes in the unfolded state.

[0005] Furthermore, upper fixing seats are respectively provided at the upper ends of the lower tubes, the upper ends of the folding side frames are movably riveted to the upper fixing seats, and the lower ends of the folding side frames are longitudinally slidably connected to the lower tubes.

[0006] Furthermore, the lower tube is provided with a slider capable of sliding up and down, and the lower end of the folding side frame is movably riveted to the slider.

[0007] Furthermore, a lower fixing seat is provided at the lower end of the lower tube, and the four corners of the base frame are movably riveted to the four lower fixing seats.

[0008] Furthermore, the folding side frame includes an X-shaped cross tube or a plurality of X-shaped cross tubes movably riveted in the same plane, and the X-shaped cross tube includes two movably riveted side tubes.

[0009] Furthermore, the base frame includes a central base and a bottom tube with one end movably riveted to the four corners of the central base, and the other end of the bottom tube is movably riveted to the lower end of the lower tube.

[0010] Furthermore, the chassis also includes a side support assembly, which includes a support rod and a connecting rod. The inner side of the support rod is movably riveted to the side of the center base, and a connecting rod is provided on the outer side of the support rod. The upper end of the connecting rod is movably riveted to the riveting point of the X-shaped cross tube.

[0011] Furthermore, a limit stopper is provided at the top of the upper tube; or a storage frame is provided in the frame.

[0012] Furthermore, a handle assembly is provided on the rear side of the frame, and the lower end of the handle assembly is rotatably connected to the lower end of the stand pipe.

[0013] Furthermore, rollers are provided at the bottom of the vertical pipe, and the two rollers at the rear side are universal wheels with brakes.

[0014] By adopting the technical scheme of the utility model, the beneficial effects of the utility model are as follows: by adopting the trolley, the user can flexibly adjust the size of the storage space according to the current number of items, and increase the space for placing items by extending the upper tube of the telescopic tube, so as to realize the placement and transportation of more items at a single time; the detachable design of the enclosure allows it to be freely removed when transporting fewer items, and the upper tube is retracted into the lower tube to reduce the space for placing items; by arranging side support components connected to the folding side frames on both sides on the bottom frame, the center of the bottom frame is supported, the load-bearing strength of the trolley is improved, and the load-bearing stability of the bottom frame is improved; the vertical tube of the entire frame is retractable and combined with the design of the foldable bottom frame and folding side frames, it can be folded when not in use to reduce the floor space, which is convenient for storage; the two rollers on the rear side adopt universal wheels with brakes to facilitate the adjustment of direction during driving or timely braking to stop. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a stereogram of a trolley with adjustable capacity;

[0016] Figure 2 A perspective view of a trolley with adjustable capacity;

[0017] Figure 3 is a side view of a trolley with adjustable capacity;

[0018] Figure 4 It is a schematic diagram of the bottom surface of an adjustable capacity;

[0019] Figure 5 It is a schematic diagram of a fence;

[0020] Figure 6 A schematic diagram of a storage box.

[0021] In the figure: 1 vertical pipe, 11 upper pipe, 12 lower pipe, 13 upper fixing seat, 14 lower fixing seat, 15 slider, 16 limit plug, 2 folding side frame, 21 X-shaped cross pipe, 21a side pipe, 22 riveting point, 3 enclosure, 31 installation part, 4 bottom frame, 41 center base, 42 bottom pipe, 43 support rod, 44 connecting rod, 5 storage frame, 51 installation opening, 6 handle assembly, 7 roller, 71 universal wheel. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1-6 As shown, the utility model discloses a capacity-adjustable trolley, including a frame, wherein the frame includes four vertical tubes 1 arranged at four corners, two adjacent vertical tubes are directly provided with folding side frames 2, the four corners of the bottom frame are movably riveted to the lower ends of the four vertical tubes, the vertical tubes 1 adopt telescopic tubes including upper tubes 11 and lower tubes 12, and detachable enclosures 3 are provided on the four upper tubes in the unfolded state.

[0024] The left and right sides of the enclosure 3 are provided with mounting parts 31, such as Figure 5 As shown, the mounting portion 31 adopts a conventional fixing structure such as Velcro, buckle, zipper, etc. When the frame is unfolded, the mounting portion 31 is fixed on the upper tube 11. The enclosure 3 adopts a hollow net with multiple holes. The enclosure 3 can be one, which is wrapped around the outside of the four upper tubes for one week and then fixed by the two mounting portions 31. It is also possible to set a separate enclosure 3 between two adjacent upper tubes, and the four enclosures 3 are connected in sequence.

[0025] An upper fixing seat 13 is respectively disposed at the upper end of the lower tube 12 , the upper end of the folding side frame 3 is movably riveted to the upper fixing seat 13 , and the lower end of the folding side frame 3 is longitudinally slidably connected to the lower tube 12 .

[0026] The lower tube 12 is provided with a slider 15 that can slide up and down, and the lower end of the folding side frame 3 is riveted to the slider 15. The slider 15 is installed on the lower tube 12 through the mounting hole in the middle, and the aperture of the mounting hole is larger than the diameter of the lower tube.

[0027] A lower fixing seat 14 is provided at the lower end of the lower tube 12, and four corners of the bottom frame 4 are movably riveted to the four lower fixing seats.

[0028] The foldable side frame 2 includes an X-shaped cross tube 21 or multiple X-shaped cross tubes riveted in the same plane, and the X-shaped cross tube includes two side tubes 21a that are riveted in the same plane. The front and rear sides of the trolley of this embodiment use two X-shaped cross tubes riveted in the same plane, and the left and right sides use three X-shaped cross tubes riveted in the same plane.

[0029] The base frame 4 includes a central base 41 and a bottom tube 42 with one end movably riveted to the four corners of the central base 41, and the other end of the bottom tube is movably riveted to the lower end of the lower tube 12. When folded, the bottom tube 42 rotates to the lower side of the central base 41.

[0030] The base frame 4 further includes a side support assembly, which includes a support rod 43 and a connecting rod 44. The inner side of the support rod 81 is movably riveted to the side of the central base 41. The outer side of the support rod 43 is provided with a connecting rod 44 (the lower end of the connecting rod is movably installed in the hole of the support rod), and the upper end of the connecting rod 44 is movably riveted to the riveting point 22 of the X-shaped cross tube. When folded, the support rod 43 rotates toward the lower side of the central base 41.

[0031] A stopper 16 is provided at the top of the upper tube 11, and the lower end of the stopper 16 is inserted into the tube of the upper tube 11 to prevent the enclosure from shifting and detaching from the top of the upper tube during use. A storage frame 5 is provided in the frame, and the storage frame 5 is placed on the bottom frame 4. An installation opening 51 is provided on the outer wall of the storage frame 5, and the opening of the installation opening 51 faces downward, and the installation opening 51 covers the upper end hinged part between the two X-shaped cross tubes in the folding side frame. Preferably, the installation opening 51 is provided on the left and right sides of the storage frame 5.

[0032] A handle assembly 6 is provided at the rear side of the frame, and the lower end of the handle assembly 6 is rotatably connected to the lower end of the vertical tube, specifically the lower tube 12. The handle assembly 6 includes a handle 61, a telescopic tube 62, a connecting seat 63, and two connecting tubes 64 symmetrically arranged on the left and right sides of the connecting seat 63, which are arranged in sequence from top to bottom. The telescopic tube 62 passes through the through hole of the connecting seat 63 and can move up and down. The upper and lower ends of the connecting tube 64 are movably riveted to the connecting seat 63 and the lower fixing seat 14, respectively. The handle assembly 6 is movably riveted to the lower fixing seat 14, and rotates forward and backward to fit or move away from the vertical tube 1.

[0033] The bottom of the lower tube 12 is provided with a roller 7, and the two rollers at the rear side are universal wheels 71 with brakes.

[0034] 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 trolley with adjustable capacity, comprising a frame, characterized in that: The frame includes four vertical tubes arranged at four corners, and foldable side frames are directly arranged on two adjacent vertical tubes. The four corners of the bottom frame are movably riveted to the lower ends of the four vertical tubes. The vertical tubes adopt telescopic tubes including upper tubes and lower tubes. Removable enclosures are arranged on the four upper tubes in the unfolded state.

2. A capacity-adjustable trolley according to claim 1, characterized in that: The upper ends of the lower tubes are respectively provided with upper fixing seats, the upper ends of the folding side frames are movably riveted to the upper fixing seats, and the lower ends of the folding side frames are longitudinally slidably connected to the lower tubes.

3. A capacity-adjustable trolley according to claim 2, characterized in that: The lower tube is provided with a sliding block which can slide up and down, and the lower end of the folding side frame is movably riveted to the sliding block.

4. The capacity-adjustable trolley according to claim 1, characterized in that: A lower fixing seat is arranged at the lower end of the lower tube, and four corners of the bottom frame are movably riveted to the four lower fixing seats.

5. A capacity-adjustable trolley according to any one of claims 1 to 4, characterized in that: The folding side frame includes an X-shaped cross tube or a plurality of X-shaped cross tubes movably riveted in the same plane, and the X-shaped cross tube includes two movably riveted side tubes.

6. The capacity-adjustable trolley according to claim 5, characterized in that: The base frame comprises a central base and a bottom tube with one end movably riveted to the four corners of the central base, and the other end of the bottom tube is movably riveted to the lower end of the lower tube.

7. The capacity-adjustable trolley according to claim 6, characterized in that: The chassis also includes a side support assembly, which includes a support rod and a connecting rod. The inner side of the support rod is movably riveted to the side of the central base, and a connecting rod is provided on the outer side of the support rod. The upper end of the connecting rod is movably riveted to the riveting point of the X-shaped cross tube.

8. The capacity-adjustable trolley according to claim 1, characterized in that: A limit stopper is provided on the top of the upper tube; or a storage frame is provided in the frame.

9. The capacity-adjustable trolley according to claim 1, characterized in that: A handle assembly is arranged on the rear side of the frame, and the lower end of the handle assembly is rotatably connected to the lower end of the stand pipe.

10. The capacity-adjustable trolley according to claim 1, characterized in that: A roller is arranged at the bottom of the vertical pipe, and two rollers at the rear side are universal wheels with brakes.

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