A double cross flat-fold trolley

Abstract

This utility model discloses a double-cross folding handcart, including a symmetrical front frame and a rear frame. The front and rear frames are movably connected by a bottom folding frame, and the left and right sides of the front and rear frames are each connected by a side folding frame. Each side folding frame includes two symmetrical cross rods and two side rods, with the two side rods located on the front and rear sides of the two cross rods. Each cross rod includes a long rod and a short rod that are movably connected in a cross manner. The upper ends of the two long rods are movably connected, and the lower ends of the two short rods are movably connected. The lower ends of the two long rods are movably connected to the front and rear frames respectively, and the upper ends of the two short rods are movably connected to the lower ends of the two side rods respectively. The upper ends of the two side rods are movably connected to the front and rear frames respectively. By using the bottom folding frame and the side folding frame to fold the front and rear frames together, the handcart is folded flat, reducing its size and making it easier for users to carry and use, as well as for bulk packaging and transportation in enterprise production.

Description

Technical Field

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

[0002] Handcarts are commonly used in daily life for transporting various items in areas where motor vehicles are inconvenient to navigate, making them a fairly standard means of transportation. Some existing handcarts have a fixed overall shape. For example, Chinese patent CN222611189U discloses a handcart with a reinforced structure, where a handle is fixedly mounted on the top of the frame and wheels are installed at the bottom. Because of their fixed size, these handcarts take up a significant amount of space when placed in vehicles or other similar spaces, making them inconvenient to carry and transport in bulk. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a double-cross folding handcart. Through its foldable and storage design, the size of the handcart is reduced, making it convenient to carry and store when going out.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a double-cross flat-folding handcart, comprising a symmetrical front frame and a rear frame, the front frame and the rear frame being movably connected by a bottom folding frame, and the left and right sides of the front frame and the rear frame being connected by a side folding frame respectively; the side folding frame includes two symmetrical cross rods and two side rods, the two side rods being located on the front and rear sides of the two cross rods; the cross rods include long rods and short rods that are movably connected in a cross manner, the upper ends of the two long rods being movably connected, and the lower ends of the two short rods being movably connected; the lower ends of the two long rods are movably connected to the front frame and the rear frame respectively, the upper ends of the two short rods are movably connected to the lower ends of the two side rods respectively, and the upper ends of the two side rods are movably connected to the front frame and the rear frame respectively.

[0005] Furthermore, it also includes a support rod located below the bottom folding frame, with the lower ends of the two short rods connected at the lower connection points, and both ends of the support rod being movably connected to the two lower connection points respectively.

[0006] Furthermore, the front frame and rear frame have the same structure, including 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 connector is provided on the inner side of the lower crossbar, and the lower end of the long bar is movably riveted to the connector.

[0007] Furthermore, a tie rod can be detachably installed on the lower crossbar of the front frame.

[0008] Furthermore, the pull rod includes a handle and a telescopic rod, with the handle located at the top of the telescopic rod and the bottom of the telescopic rod being movably riveted to the lower crossbar and capable of rotating back and forth.

[0009] Furthermore, the front frame uses swivel casters, while the rear frame uses fixed casters.

[0010] Furthermore, the bottom folding frame includes two symmetrically arranged bottom frames, each bottom frame including two bottom rods and a connecting rod. The two bottom rods are symmetrically distributed in a figure-eight shape, narrower on the inside and wider on the outside. Each bottom rod includes an integrally formed inner straight rod, an S-curved rod, and an outer straight rod. The two outer straight rods are connected by the connecting rod, and the outer straight rods are movably riveted to the connecting piece. The inner straight rods of the two bottom rods are movably riveted together.

[0011] Furthermore, the bottom folding frame also includes a pair of sleeves, which are respectively fitted onto the two inner straight rods of one bottom frame; the two inner straight rods of the other bottom frame are located between the two inner straight rods on which the sleeves are installed.

[0012] Furthermore, the included angle at the connection between the upper end of the short rod and the lower end of the side rod is less than 180°, and / or the included angle at the connection between the upper end of the short rod and the lower end of the side rod is greater than 180°.

[0013] Furthermore, it also includes a storage bag with a top opening, and mounting holes at the four corners of the upper edge of the storage bag. The storage bag is placed on the bottom folding frame, and the tube plug passes through the mounting holes and is embedded in the upper end of the upright.

[0014] The beneficial effects of this utility model are as follows: The bottom folding frame and side folding frames are used to fold the front and rear frames together, allowing the trolley to fold flat, reducing its size and making it easier for users to carry and use, as well as for bulk packaging and transportation in production. Two crossbars and two side bars form the side folding frame, and two bottom frames form the bottom folding frame, allowing for storage on both sides and the bottom, reducing the area. Universal wheels are installed on the pull rod side for quick direction adjustment during transport. The support rod below the bottom folding frame connects the left and right side folding frames, providing support and enhancing the load-bearing capacity of the bottom folding frame, thus improving the stability of the trolley. Attached Figure Description

[0015] Figure 1 It is a three-dimensional double-cross flat-folding handcart Figure 1 ;

[0016] Figure 2 It is a three-dimensional double-cross flat-folding handcart Figure 2 ;

[0017] Figure 3 This is a side view of a double-cross folding handcart;

[0018] Figure 4 This is a diagram showing the folding state of a double-cross flat-folding handcart;

[0019] Figure 5 This is a schematic diagram of the assembly of the storage bag and the top of the pole.

[0020] In the diagram: 1. Front frame, 11. Upright pole, 12. Lower crossbar, 2. Rear frame, 3. Bottom folding frame, 30. Bottom frame, 31. Bottom pole, 31a. Inner straight pole, 31b. S-curved pole, 31c. Outer straight pole, 32. Connecting pole, 33. Tube sleeve, 4. Side folding frame, 40. Cross pole, 41. Long pole, 42. Short pole, 43. Side pole, 44. Lower connection point, 5. Support pole, 6. Pull rod, 61. Handle, 62. Telescopic pole, 7. Roller, 8. Connector, 9. Storage bag, 91. Mounting hole, 10. Tube plug. 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 to 5 As shown, this embodiment provides a double-cross folding handcart, including a symmetrical front frame 1 and a rear frame 2. The front frame 1 and the rear frame 2 are movably connected by a bottom folding frame 3. The left and right sides of the front frame 1 and the rear frame 2 are respectively connected by a side folding frame 4. The side folding frame 4 includes two symmetrical cross rods 40 and two side rods 43, with the two side rods 43 located on the front and rear sides of the two cross rods 40. The cross rods 40 include long rods 41 and short rods 42 that are movably connected in a cross manner. The upper ends of the two long rods 41 are movably connected, and the lower ends of the two short rods 42 are movably connected. The lower ends of the two long rods 41 are movably connected to the front frame 1 and the rear frame 2, respectively. The upper ends of the two short rods 42 are movably connected to the lower ends of the two side rods 43, respectively. The upper ends of the two side rods 43 are movably connected to the front frame 1 and the rear frame 2, respectively.

[0023] It also includes a support rod 5 located below the bottom folding frame 3. The lower ends of the two short rods 42 are movably connected to the lower connection points 44. The two ends of the support rod 5 are movably connected to the two lower connection points 44 respectively, providing auxiliary support for the bottom folding frame 3 in the unfolded state.

[0024] The front frame 1 and the rear frame 2 have the same structure, including 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. Rollers 7 are detachably installed at the bottom of the uprights 11. A connector 8 is provided on the inner side of the lower crossbar 12, and the lower end of the long rod 41 is movably riveted to the connector 8.

[0025] A pull rod 6 is detachably installed on the lower crossbar 12 of the front frame 1. The pull rod 6 includes a handle 61 and a telescopic rod 62. The handle is located at the top of the telescopic rod, and the bottom of the telescopic rod is movably riveted to the lower crossbar and can rotate back and forth.

[0026] The rollers 7 on the front frame 1 are omnidirectional wheels, while the rollers on the rear frame 2 are fixed wheels.

[0027] The bottom folding frame 3 includes two symmetrically arranged bottom frames 30. Each bottom frame 30 includes two bottom rods 31 and a connecting rod 32. The two bottom rods 31 are symmetrically distributed in a figure-eight shape, narrower on the inside and wider on the outside. Each bottom rod 31 includes an integrally formed inner straight rod 31a, an S-curved rod 31b, and an outer straight rod 31c. The two outer straight rods 31c are connected by the connecting rod 32, and the outer straight rods 31c are movably riveted to the connecting parts. The inner straight rods of the two bottom rods are movably riveted together.

[0028] The bottom folding frame 3 also includes a pair of sleeves 33, which are respectively fitted onto the two inner straight rods of one bottom frame 30; the two inner straight rods of the other bottom frame 30 are located between the two inner straight rods on which the sleeves 33 are installed. The sleeves can be made of plastic or rubber.

[0029] The included angle α at the connection between the upper end of the short rod 42 and the lower end of the side rod 43 is less than 180°, and the included angle β at the connection between the upper end of the short rod 42 and the lower end of the side rod 43 is greater than 180°. By setting specific angles, the height of the side folding frame 4 in the folded state is not greater than the height of the upright 11, so the height of the trolley in the folded state is not higher than the height in the unfolded state.

[0030] It also includes a top-opening storage bag 9, with mounting holes 91 at the four corners of its upper edge. The storage bag is placed on a bottom folding frame, and a tube plug 10 passes through the mounting holes 91 and is embedded in the upper end of the upright 11, and can be fixed by fasteners such as rivets or screws. The storage bag 9 is preferably made of a flexible material such as Oxford cloth.

[0031] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A double cross flat-fold trolley characterised in that, It includes a symmetrical front frame and a rear frame, which are movably connected by a bottom folding frame. The left and right sides of the front frame and the rear frame are each connected by a side folding frame. The side folding frame includes two symmetrical cross rods and two side rods, with the two side rods located on the front and rear sides of the two cross rods. The cross rods include long rods and short rods that are movably connected in a cross manner. The upper ends of the two long rods are movably connected, and the lower ends of the two short rods are movably connected. The lower ends of the two long rods are movably connected to the front frame and the rear frame, respectively. The upper ends of the two short rods are movably connected to the lower ends of the two side rods, respectively. The upper ends of the two side rods are movably connected to the front frame and the rear frame, respectively.

2. A double cross flat-fold trolley according to claim 1, wherein, It also includes a support rod located below the bottom folding frame. The lower ends of the two short rods are connected to the lower connection points, and the two ends of the support rod are connected to the two lower connection points respectively.

3. A double cross flat-fold trolley according to claim 1, wherein, The front and rear frames have the same structure, including two uprights and a lower crossbar. The two ends of the lower crossbar are connected to the lower ends of the two uprights. Rollers are detachably installed at the bottom of the uprights. A connector is provided on the inner side of the lower crossbar, and the lower end of the long bar is movably riveted to the connector.

4. A double cross flat-fold trolley according to claim 3, wherein, A tie rod can be detachably installed on the lower crossbar of the front frame.

5. A double cross flat-fold trolley according to claim 4, wherein, The pull rod includes a handle and a telescopic rod. The handle is located at the top of the telescopic rod, and the bottom of the telescopic rod is movably riveted to the lower crossbar and can rotate back and forth.

6. A double cross flat-fold stroller according to claim 1, wherein, The front frame has swivel casters, while the rear frame has fixed casters.

7. A double cross flat-fold trolley according to claim 3, wherein, The bottom folding frame includes two symmetrically arranged bottom frames, each bottom frame including two bottom rods and a connecting rod. The two bottom rods are symmetrically distributed in a figure-eight shape, narrower on the inside and wider on the outside. The base rod consists of an integrally formed inner straight rod, an S-curved rod, and an outer straight rod. The two outer straight rods are connected by a connecting rod, and the outer straight rods are movably riveted to the connecting parts; the inner straight rods of the two base rods are movably riveted together.

8. A double cross flat-fold trolley according to claim 7, characterised in that, The bottom folding frame also includes a pair of tube sleeves, which are respectively fitted onto two inner straight rods of a bottom frame; The other bottom frame has two inner straight rods located between two inner straight rods with sleeves installed.

9. The dual cross flat-fold stroller of claim 1, wherein, The included angle at the connection between the upper end of the short rod and the lower end of the side rod is less than 180°, and / or the included angle at the connection between the upper end of the short rod and the lower end of the side rod is greater than 180°.

10. The dual cross flat-fold stroller of claim 1, wherein, It also includes a storage bag with a top opening, and mounting holes at the four corners of the upper edge of the storage bag. The storage bag is placed on the bottom folding frame, and the tube plug passes through the mounting holes and is embedded in the upper end of the upright.

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