Flat folding cart

Abstract

The utility model discloses a flat folding cart which comprises a front supporting frame, a rear supporting frame, a left side folding frame, a right side folding frame and a bottom folding frame. The side folding frame comprises at least one X-shaped cross rod, the upper ends of the left and right sides of the X-shaped cross rod are longitudinally and slidably connected with the two supporting frames respectively, and the lower ends of the X-shaped cross rod are movably riveted with the lower ends of the two supporting frames respectively; and the two ends of the suspender positioned below the bottom folding frame are movably riveted with the two side folding frames respectively. The suspenders are arranged to be connected with the side folding frames to assist the bottom folding frame, so that the loading bearing capacity of the bottom folding frame is enhanced, and the use stability of the cart is improved; flat folding of the stroller is achieved through folding of the bottom folding frame and the side folding frames, occupied space is reduced when the stroller is not used, and the height of the whole stroller is not increased after the upper ends of the side folding frames longitudinally slide and are folded when the side folding frames are folded.

Description

Technical Field

[0001] This utility model belongs to the technical field of handcarts, specifically relating to a flat-folding handcart. Background Technology

[0002] Handcarts are a type of transport used in daily life in places where it is inconvenient to use motor vehicles. Common handcarts come in various forms, both foldable and non-foldable.

[0003] Chinese patent CN221794661U discloses a foldable trolley comprising two main frame assemblies, two side wall cross assemblies, a base frame assembly, a pull rod assembly, and a cloth bag. The base frame assembly includes two base brackets and two base frame joints. Base frame joints are provided on both sides of each adjacent end of the two base brackets. Each base bracket includes two main base tubes, two horizontal base tubes, and two vertical base tubes. Both ends of the two vertical base tubes are fixed to the horizontal base tubes, and both ends of the two horizontal base tubes are fixed to the main base tubes. The ends of the two main base tubes on each side that are furthest from each other are rotatably connected to a fixing member. Each base frame joint includes two joint iron pieces. The two joint iron pieces are riveted together at their closest ends, and fixed to the main base tubes at their furthest ends. This trolley's base frame assembly is only connected on the front and rear sides; the left and right sides are not connected to the side wall cross assemblies, resulting in a weaker load-bearing capacity and relatively poor stability. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a flat-folding trolley.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flat folding trolley, comprising two front and rear support frames, two left and right side folding frames, and a bottom folding frame, wherein the bottom of the support frames is provided with rollers; the side folding frames include at least one X-shaped crossbar, the upper ends of the left and right sides are respectively longitudinally slidably connected to the two support frames, and the lower ends are respectively movably riveted to the lower ends of the two support frames; the two ends of the hanging rod located below the bottom folding frame are respectively movably riveted to the two side folding frames.

[0006] Furthermore, the rivet points of the hanger and the X-shaped crossbar located below the bottom folding frame are movably riveted.

[0007] Furthermore, the support frame includes two uprights and a lower crossbar, with both ends of the lower crossbar connected to the lower ends of the two uprights; rollers are detachably installed at the bottom of the uprights; a U-shaped piece is provided on the inner side of the lower crossbar, and the lower end of the side folding frame is movably riveted to the U-shaped piece.

[0008] Furthermore, a tie rod can be detachably installed on the lower crossbar of the front support frame.

[0009] Further, the pull rod comprises a handle and a telescopic rod, the handle is arranged at the top of the telescopic rod, the bottom of the telescopic rod is movably riveted with the lower cross rod and can rotate forward and backward.

[0010] Further, the pull rod further comprises a connector with a built-in ball, the connector is movably riveted with the lower cross rod, the bottom of the telescopic rod is provided with a limiting hole, and the ball passes through the limiting hole after the connector is embedded into the bottom of the telescopic rod.

[0011] Further, the vertical rod is provided with a sliding block, and the upper end of the left side or the right side of the side folding frame is movably riveted with the sliding block.

[0012] Further, the top of the vertical rod is provided with a limiting piece.

[0013] Further, the bottom folding frame comprises two groups of bottom rods which are symmetrically arranged, each group of bottom rods is symmetrically arranged left and right and is in an eight-shaped distribution with a narrow inside and a wide outside; the bottom rod comprises an integral inner straight rod, an S-shaped rod and an outer straight rod, the outer straight rod is movably riveted with the U-shaped piece; the inner straight rods at the inner ends of the two groups of bottom rods are movably riveted.

[0014] Further, the front roller is a universal wheel with a brake, and the rear roller is a directional wheel.

[0015] By adopting the technical scheme of the utility model, the utility model has the beneficial effects that: the side folding frame is connected through the suspension rod, the bottom folding frame is assisted, the load-bearing capacity of the bottom folding frame is enhanced, the stability of the trolley is improved, the trolley is flat-folded through the foldable bottom folding frame and side folding frame, the space occupation when not in use is reduced, the cross rods are gathered to drive the sliding block to slide upward, the height of the whole trolley after folding is not increased, the whole pull rod can be quickly disassembled and installed on the lower cross rod, the roller can be disassembled and installed at the bottom of the vertical rod, the bottom folding frame, the side folding frame and the supporting frame can be separately produced and assembled, and then the whole trolley is assembled, so that the installation is convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the flat-folded trolley Figure 1 ;

[0017] Figure 2 is a perspective view of the flat-folded trolley Figure 2 ;

[0018] Figure 3 is a side view of the flat-folded trolley

[0019] Figure 4 is a schematic view of the telescopic rod and the connector.

[0020] In the diagram: 1. Support frame, 11. Upright pole, 12. Lower crossbar, 13. U-shaped piece, 13a. Baffle plate, 14. Slider, 15. Top cover, 2. Side folding frame, 21. X-shaped crossbar, 22. Riveting point, 23. Washer, 3. Bottom folding frame, 31. Bottom rod, 31a. Inner straight rod, 31b. S-shaped rod, 31c. Outer straight rod, 32. End cover, 4. Roller, 5. Hanging rod, 6. Pull rod, 61. Handle, 62. Telescopic rod, 62a. Limiting hole, 63. Connector, 64. Ball bearing. Detailed Implementation

[0021] The specific solutions and embodiments of this utility model will be further described in conjunction with the accompanying drawings, making the technical solution clearer and more understandable.

[0022] like Figures 1-4 As shown, the flat-folding trolley includes two front and rear support frames 1, two left and right side folding frames 2, and a bottom folding frame 3. The support frames 1 are equipped with rollers 4 at their bottoms. Each side folding frame 3 includes at least one X-shaped crossbar 21, with its upper ends slidably connected longitudinally to the two support frames 1 on both sides, and its lower ends movably riveted to the lower ends of the two support frames 1 respectively. A hanging rod 5 located below the bottom folding frame 3 is movably riveted to both ends of the two side folding frames 3. The hanging rod 5 adopts an integrally formed U-shaped structure.

[0023] In this embodiment, the side folding frame 3 uses three X-shaped crossbars 21. Each X-shaped crossbar 21 includes two movably riveted straight rods. A washer is provided between the two straight rods of the X-shaped crossbar 21 before riveting. The riveting locations of the two straight rods in two adjacent X-shaped crossbars 21 also have washers. The washers are preferably elastic washers, such as rubber washers.

[0024] The hanging rod 5 located below the bottom folding frame 3 is riveted to the riveting point 22 of the X-cross rod 21.

[0025] The support frame 1 includes two uprights 11 and a lower crossbar 12. The two ends of the lower crossbar 12 are connected to the lower ends of the two uprights 11. The bottom of the uprights 11 is detachably equipped with rollers 4, such as inserting or threading the axle on the wheel frame of the rollers 4 to the bottom of the uprights. The lower crossbar 12 is provided with a U-shaped piece 13 on its inner side, and the lower end of the side folding frame 2 is riveted to the U-shaped piece 13.

[0026] A pull rod 6 is detachably installed on the lower crossbar 13 of the front support frame 1. The pull rod 6 includes a handle 61 and a telescopic rod 62. The handle 61 is located at the top of the telescopic rod, and the bottom of the telescopic rod is movably riveted to the lower crossbar 12 and can rotate back and forth.

[0027] The pull rod 6 further comprises a connecting head 63 with a ball 64, the connecting head 63 is movably riveted with the U-shaped piece 13 fixed on the upper end of the lower cross bar 12, the bottom of the telescopic rod 62 is provided with a limiting hole 62a, and the ball 64 is embedded in the bottom of the telescopic rod 62 and passes through the limiting hole 62a.

[0028] The vertical rod 1 is provided with a sliding block 14, and the upper end of the left side or the right side of the side folding frame 2 is movably riveted with the sliding block 12.

[0029] The vertical rod 1 is provided with a limiting piece, such as a bolt, a screw or a fixed block transversely penetrating the vertical rod, or a top cover 15 covering the top of the vertical rod 1, so as to limit the maximum stroke of the sliding block 14.

[0030] The bottom folding frame 3 comprises two groups of bottom rods 31 symmetrically arranged, each group of bottom rods 31 is symmetrically arranged left and right and is in an eight-shaped distribution with a narrow inside and a wide outside; the bottom rod 31 comprises an integral inner straight rod 31a, an S-shaped rod 31b and an outer straight rod 31c, the outer straight rod 31c is movably riveted with the U-shaped piece 13 on the inner side of the lower cross bar; the inner straight rods 31a at the inner ends of the two groups of bottom rods are movably riveted. The S-shaped rod 31b comprises a straight rod at the middle and arc-shaped rods at two ends. When the two bottom folding frames 3 are symmetrically arranged and installed, the inner straight rods 31a on the left and right outer sides are provided with (plastic) end covers 32.

[0031] In the flat folding cart, the front roller 6 is a universal wheel with a brake, and the rear roller 6 is a directional wheel. The user can quickly adjust the direction when turning during pushing and pulling the object with the pull rod, which is especially suitable for places with insufficient space to turn the vehicle direction by a large angle.

[0032] It should be noted that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A flat-fold stroller characterized in that, The support frame comprises two front and back support frames and two left and right side folding frames and a bottom folding frame, and the bottom of the support frame is provided with a roller; the side folding frame comprises at least one X-shaped cross rod, and the upper ends of the left and right sides are respectively connected with the two support frames in longitudinal sliding mode, and the lower ends are respectively connected with the lower ends of the two support frames in movable riveting mode; The two ends of the suspender located below the bottom folding frame are respectively connected with the two side folding frames in movable riveting mode.

2. The flat-fold stroller of claim 1, wherein, The riveting point of the suspender located below the bottom folding frame and the X-shaped cross rod is connected in movable riveting mode.

3. The flat-fold stroller of claim 1, wherein, The support frame comprises two vertical rods and a lower horizontal rod, and the two ends of the lower horizontal rod are connected with the lower ends of the two vertical rods; the bottom of the vertical rod is detachably provided with a roller; the inner side of the lower horizontal rod is provided with a U-shaped piece, and the lower end of the side folding frame is connected with the U-shaped piece in movable riveting mode.

4. The flat-fold stroller of claim 3, wherein, The lower horizontal rod of the front side support frame is detachably provided with a pull rod.

5. The flat-fold stroller of claim 4, wherein, The pull rod comprises a handle and an extension rod, the handle is arranged at the top of the extension rod, and the bottom of the extension rod is connected with the lower horizontal rod in movable riveting mode and can rotate forward and backward.

6. The flat-fold stroller of claim 5, wherein, The pull rod further comprises a connector provided with a spring ball, the connector is connected with the lower horizontal rod in movable riveting mode, the bottom of the extension rod is provided with a limiting hole, and the spring ball passes through the limiting hole after the connector is embedded into the bottom of the extension rod.

7. The flat-fold stroller of claim 3, wherein, The vertical rod is provided with a sliding block, and the upper end of the left side or the right side of the side folding frame is connected with the sliding block in movable riveting mode.

8. The flat-fold stroller of claim 6, wherein, The top of the vertical rod is provided with a limiting piece.

9. The flat-fold stroller of claim 3, wherein, The bottom folding frame comprises two groups of bottom rods arranged symmetrically, and each group of bottom rods is arranged in left and right symmetrical eight-shaped distribution with narrow inside and wide outside; the bottom rod comprises an integral inner straight rod, an S-shaped rod and an outer straight rod, the outer straight rod is connected with the U-shaped piece in movable riveting mode, and the inner straight rods at the inner ends of the two groups of bottom rods are connected in movable riveting mode.

10. The flat-fold stroller of any of claims 1-6, wherein, The roller on the front side is a universal wheel with a brake, and the roller on the rear side is a directional wheel.

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