Foldable double-layer trolley

Abstract

The utility model discloses a foldable double-layer trolley which comprises two front vertical pipes and two rear vertical pipes, a bottom frame assembly, an upper frame assembly and two side frame assemblies are arranged between the front vertical pipes and the rear vertical pipes, a front support assembly is arranged between the front vertical pipes, and a rear support assembly is arranged between the rear vertical pipes. The bottom frame assembly and the upper frame assembly each comprise a telescopic support, and a connecting base is arranged between the telescopic supports. The side frame assembly comprises a third X-shaped telescopic bracket; the front bracket assembly comprises a fourth X-shaped telescopic bracket; the rear bracket assembly comprises a fifth X-shaped telescopic bracket; compared with the prior art, the X-shaped telescopic support frame has the advantages that the two X-shaped telescopic support frames are arranged between the bottom frame assembly and the upper frame assembly, the telescopic support frames are connected through the connecting seats, and the telescopic support frames are connected through the connecting seats. And the supporting rods are arranged between the connecting seats of the bottom frame assembly and the upper frame assembly, so that the bearing of the bottom frame assembly and the upper frame assembly is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of trolleys, in particular to a foldable double-layer trolley. Background Art

[0002] Handcarts, as a tool for daily manual carrying, pushing and pulling of objects, are very convenient for carrying lighter objects over short distances. They are widely used to carry objects in places where motor vehicles are inconvenient to use.

[0003] For example, the patent disclosure with the announcement number CN212148912U discloses a double-layer trolley, which includes vertical tubes arranged at four corners, along which upper brackets, sliding members and lower brackets are sequentially arranged. A first bottom tube is provided in the middle between the vertical tubes, and the inner end of the first bottom tube is rotatably connected to the first bottom connecting member. The outer end of the first bottom tube is rotatably connected to the sliding member. A second bottom tube is provided in the lower part between the vertical tubes, and the inner end of the second bottom tube is rotatably connected to the lower bracket.

[0004] In the structure of the above-mentioned trolley, the vertical tubes are only connected by connecting parts and bottom tubes cross-connected to the connecting parts, which are used to carry goods. However, the force support area is small, and there are no supporting parts between the first bottom tube and the second bottom tube. When the carried goods are heavy, obvious deformation is likely to occur, affecting the use of the trolley. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a foldable double-layer trolley which has stable load-bearing capacity and is not prone to deformation.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a foldable double-layer trolley, characterized in that it includes two front vertical tubes and two rear vertical tubes distributed at four corners, a bottom frame assembly, an upper frame assembly and two side frame assemblies are arranged between the front vertical tubes and the rear vertical tubes, a front bracket assembly is arranged between the two front vertical tubes, and a rear bracket assembly is arranged between the two rear vertical tubes;

[0007] The chassis assembly includes two first X-shaped shrinkage brackets, the two first X-shaped shrinkage brackets are respectively connected to the front vertical pipe and the rear vertical pipe, and a lower connecting seat is provided between the two first X-shaped shrinkage brackets;

[0008] The upper frame assembly includes two second X-shaped shrinkage brackets, the two second X-shaped shrinkage brackets are respectively connected to the front vertical pipe and the rear vertical pipe, and an upper connecting seat is provided between the two second X-shaped shrinkage brackets;

[0009] A side frame assembly comprising three hinged third X-shaped retractable supports;

[0010] A front bracket assembly comprising two hinged fourth X-shaped retractable brackets;

[0011] a rear support assembly comprising two hinged fifth X-shaped retractable supports;

[0012] A support rod is provided between the lower connecting seat and the upper connecting seat, and the central hinge of the third X-shaped shrinkage bracket located in the middle is connected to the upper connecting seat.

[0013] A further preferred solution of the present invention is: the first X-shaped retractable bracket includes a middle first connecting member and four first connecting tubes hinged to it, two of which are hinged to the front vertical tube / rear vertical tube, and the other two are hinged to the lower connecting seat.

[0014] A further preferred solution of the present invention is: the second X-shaped retractable bracket includes a middle second connecting member and four second connecting tubes hinged to it, two of which are hinged to the front vertical tube / rear vertical tube, and the other two are hinged to the upper connecting seat.

[0015] A further preferred solution of the present invention is that a sliding member, an upper fixing member and a lower fixing member are sequentially provided on the front vertical pipe / the rear vertical pipe from top to bottom, the lower fixing member is fixedly connected to the bottom end of the front vertical pipe / the bottom end of the rear vertical pipe, the upper fixing member is fixedly connected to the middle portion of the front vertical pipe / the middle portion of the rear vertical pipe, and the sliding member is slidably connected to the upper end portion of the front vertical pipe / the upper end portion of the rear vertical pipe.

[0016] A further preferred solution of the present invention is that the outer ends of the third X-shaped shrinkage bracket located on both sides are provided with two hinged ends, one of which is hinged to the sliding member, and the other is hinged to the upper fixing member.

[0017] A further preferred solution of the present invention is that the outer end of the fourth X-shaped shrink bracket is provided with a hinged end, one of the hinged ends is hinged to the sliding member, and the other hinged end is hinged to the upper fixing member.

[0018] A further preferred solution of the present invention is that the outer end of the fifth X-shaped shrink bracket is provided with a hinged end, one of the hinged ends is hinged to the sliding member, and the other hinged end is hinged to the upper fixing member.

[0019] A further preferred solution of the present invention is that a reinforcing rod is hingedly connected between the third X-shaped contraction bracket of the side frame assembly and the upper connecting seat.

[0020] A further preferred solution of the present invention is that a rotating frame is rotatably connected to the rear vertical pipe.

[0021] A further preferred solution of the present invention is that a pull rod is rotatably connected to the front vertical tube.

[0022] Compared with the existing technology, the present invention has the following advantages: two X-shaped shrinkage brackets are provided between the base frame assembly and the upper frame assembly, and the two X-shaped shrinkage brackets are connected to the connecting pipe through a connecting seat, which increases the force support area of ​​the base frame assembly and the upper frame assembly, and can stably carry more goods. In addition, a support rod is provided between the connecting seat of the base frame assembly and the upper frame assembly, so that the load-bearing capacity of the base frame assembly and the upper frame assembly is more stable and not easy to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the present invention. In addition, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0024] Figure 1 This is one of the schematic diagrams of the overall structure of the trolley;

[0025] Figure 2 This is the second schematic diagram of the overall structure of the trolley;

[0026] Figure 3 Schematic diagram of the overall structure of the folded trolley;

[0027] Figure 4 This is a front view of the trolley when it is unfolded;

[0028] Figure 5 It is an overall schematic diagram of the first X-shaped shrink bracket;

[0029] In the figure: 1. rear vertical tube; 2. sliding member; 3. fifth connecting tube; 4. upper fixing member; 5. rotating frame; 6. lower fixing member; 7. second connecting member; 8. third connecting tube; 9. pull rod; 10. fourth connecting tube; 11. first connecting member; 12. roller; 13. first connecting tube; 14. roller seat; 15. brake; 16. front vertical tube; 17. second connecting tube; 18. reinforcing rod; 19. support rod; 20. lower connecting seat; 21. upper connecting seat; 22. first X-type retractable bracket; 23. second X-type retractable bracket; 24. third X-type retractable bracket; 25. fourth X-type retractable bracket; 26. fifth X-type retractable bracket. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0031] It should be noted that like reference numerals denote like items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0032] This embodiment mainly describes a foldable double-layer trolley, as follows:

[0033] like Figure 1 As shown, the foldable double-layer trolley includes two front vertical tubes 16 and two rear vertical tubes 1 distributed at the four corners, a bottom frame assembly, an upper frame assembly and two side frame assemblies are provided between the front vertical tubes 16 and the rear vertical tubes 1, a front bracket assembly is provided between the two front vertical tubes 16, and a rear bracket assembly is provided between the two rear vertical tubes 1.

[0034] The two front vertical tubes 16 and the two rear vertical tubes 1 are provided with a sliding member 2, an upper fixing member 4 and a lower fixing member 6 in sequence from top to bottom. The lower fixing member 6 is fixedly connected to the bottom ends of the two front vertical tubes 16 and the two rear vertical tubes 1, the upper fixing member 4 is fixedly connected to the middle parts of the two front vertical tubes 16 and the two rear vertical tubes 1, and the sliding member 2 is slidably connected to the upper ends of the two front vertical tubes 16 and the two rear vertical tubes 1.

[0035] like Figure 2 、 Figure 5 As shown, the base frame assembly includes two first X-shaped shrinkage brackets 22, and two lower connecting seats 20 are provided between the two first X-shaped shrinkage brackets 22.

[0036] The first X-shaped shrink bracket 22 includes a first connecting member 11 and four first connecting tubes 13 hinged to the first connecting member 11 .

[0037] Two of the first connecting tubes 13 in each first X-shaped shrinkage bracket 22 are respectively hinged on the two lower connecting seats 20, the other two first connecting tubes 13 in one first X-shaped shrinkage bracket 22 are respectively hinged on the two lower fixing parts 6 of the front vertical tube 16, and the other two first connecting tubes 13 in the other first X-shaped shrinkage bracket 22 are respectively hinged on the two lower fixing parts 6 of the rear vertical tube.

[0038] The upper frame assembly includes two second X-shaped shrink brackets 23. Two upper connecting seats 21 are provided between the two second X-shaped shrink brackets 23. The two second connecting members 7 are symmetrically arranged with the upper connecting seats 21 as the symmetry axis.

[0039] The second X-shaped shrink bracket 23 includes a second connecting member 7 and four second connecting tubes 17 hinged to the second connecting member 7 .

[0040] Two of the second connecting tubes 17 in each second X-shaped shrinkage bracket 23 are respectively hinged on the two upper connecting seats 21, the other two second connecting tubes 17 in one second X-shaped shrinkage bracket 23 are respectively hinged on the two upper fixing parts 4 of the front vertical tube 16, and the other two second connecting tubes 17 in the other second X-shaped shrinkage bracket 23 are respectively hinged on the two upper fixing parts 4 of the rear vertical tube.

[0041] A side frame assembly is provided between the front vertical tube 16 and the rear vertical tube 1 on the same side. The side frame assembly includes three hinged third X-shaped retractable brackets 24. Each third X-shaped retractable bracket 24 includes two cross-arranged third connecting tubes 8. The outer ends of the third connecting tubes 8 located on both sides are provided with two hinged ends, one of which is hinged to the sliding member 2, and the other is hinged to the upper fixing member 4.

[0042] The intersection of the third connecting pipes 8 located in the middle and cross-connected is connected to the upper connecting seat 21, making the overall structure of the side frame assembly more stable.

[0043] like Figure 4 As shown, a reinforcing rod 18 is hinged between the third connecting tube 8 and the upper connecting seat 21. Specifically, two reinforcing rods 18 are provided, one end of the two reinforcing rods 18 is hinged on the upper connecting seat 21, and the other end is respectively hinged on the third connecting tube 8 on both sides. The setting of the reinforcing rod 18 enhances the stability of the cart when it is unfolded.

[0044] A front bracket assembly is provided between the two front vertical tubes 16, and the front bracket assemblies include two hinged fourth X-shaped retractable brackets 25. The fourth X-shaped retractable bracket 25 is composed of two cross-arranged fourth connecting tubes 10. The outer end of the fourth connecting tube 10 is provided with two hinged ends, one of which is hinged to the sliding member 2, and the other is hinged to the upper fixing member 4. The expansion and folding of the fourth connecting tubes 10 are achieved as the sliding member 2 moves.

[0045] A rear bracket assembly is provided between the two rear vertical tubes 1, and the rear bracket assemblies include two hinged fifth X-shaped retractable brackets 26. The fifth X-shaped retractable bracket 26 includes two cross-arranged fifth connecting tubes 3. The outer end of the fifth connecting tube 3 is provided with two hinged ends, one of which is hinged to the sliding member 2, and the other hinged end is hinged to the upper fixing member 4. The expansion and folding of the fifth connecting tubes 3 are achieved as the sliding member 2 moves.

[0046] A support rod 19 is provided between the lower connecting seat 20 and the upper connecting seat 21. The two ends of the support rod 19 are fixedly connected to the lower connecting seat 20 and the upper connecting seat 21 respectively, thereby improving the overall structural stability of the cart. When the cart is unfolded, the support rod 19 can enhance the load-bearing capacity of the base assembly and the upper frame assembly.

[0047] like Figure 3 As shown, a rotating frame 5 is rotatably connected to the two rear vertical tubes 1. Specifically, the rotating frame 5 is hinged to the lower fixing parts 6 on the two rear vertical tubes 1. When the rotating frame 5 is unfolded, it can be used to place items to increase the storage space of the trolley. When the trolley is folded, the rotating frame 5 can be rotated to a position parallel to the rear vertical tubes 1, thereby reducing the volume of the folded trolley.

[0048] The two front vertical tubes 16 are rotatably connected with a pull rod 9. Specifically, the pull rod 9 is hinged on the lower fixing parts 6 on the two front vertical tubes 16. The angle between the pull rod 9 and the front vertical tube 16 can be adjusted according to the height of the user to achieve the purpose of saving effort.

[0049] A roller seat 14 is provided at one end of the lower fixing part 6 of the two front vertical tubes 16 and the two rear vertical tubes 1, and a roller 12 is connected to the roller seat 14 and a brake 15 is provided on the roller seat 14 at the bottom end of the two front vertical tubes 16. When the cart needs to be fixed, the brake 15 is opened to fix the roller 12 to prevent the cart from moving.

[0050] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0051] The above is a detailed introduction to the foldable double-layer trolley provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in several ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Foldable double-layer trolley, characterized in that: It includes two front vertical pipes and two rear vertical pipes distributed on the four corners, a bottom frame assembly, an upper frame assembly and two side frame assemblies are arranged between the front vertical pipes and the rear vertical pipes, a front bracket assembly is arranged between the two front vertical pipes, and a rear bracket assembly is arranged between the two rear vertical pipes; The chassis assembly includes two first X-shaped shrinkage brackets, the two first X-shaped shrinkage brackets are respectively connected to the front vertical pipe and the rear vertical pipe, and a lower connecting seat is provided between the two first X-shaped shrinkage brackets; The upper frame assembly includes two second X-shaped shrinkage brackets, the two second X-shaped shrinkage brackets are respectively connected to the front vertical pipe and the rear vertical pipe, and an upper connecting seat is provided between the two second X-shaped shrinkage brackets; A side frame assembly comprising three hinged third X-shaped retractable supports; A front bracket assembly comprising two hinged fourth X-shaped retractable brackets; a rear support assembly comprising two hinged fifth X-shaped retractable supports; A support rod is provided between the lower connecting seat and the upper connecting seat, and the central hinge of the third X-shaped shrinkage bracket located in the middle is connected to the upper connecting seat.

2. The foldable double-layer trolley according to claim 1, characterized in that: The first X-shaped contraction bracket includes a middle first connecting member and four first connecting tubes hinged to it, two of which are hinged to the front vertical tube / rear vertical tube, and the other two are hinged to the lower connecting seat.

3. The foldable double-layer trolley according to claim 1, characterized in that: The second X-shaped shrink bracket includes a middle second connecting member and four second connecting tubes hinged to it, two of which are hinged to the front vertical tube / rear vertical tube, and the other two are hinged to the upper connecting seat.

4. The foldable double-layer trolley according to claim 1, characterized in that: A sliding member, an upper fixing member and a lower fixing member are sequentially provided on the front vertical pipe / rear vertical pipe from top to bottom. The lower fixing member is fixedly connected to the bottom end of the front vertical pipe / the bottom end of the rear vertical pipe, the upper fixing member is fixedly connected to the middle part of the front vertical pipe / the middle part of the rear vertical pipe, and the sliding member is slidably connected to the upper end part of the front vertical pipe / the upper end part of the rear vertical pipe.

5. The foldable double-layer trolley according to claim 4, characterized in that: The outer ends of the third X-shaped shrink brackets located on both sides are provided with two hinged ends, one of which is hinged to the sliding member, and the other is hinged to the upper fixing member.

6. The foldable double-layer trolley according to claim 4, characterized in that: The outer end of the fourth X-shaped shrink bracket is provided with two hinged ends, one of which is hinged to the sliding member, and the other is hinged to the upper fixing member.

7. The foldable double-layer trolley according to claim 4, characterized in that: The outer end of the fifth X-shaped shrink bracket is provided with two hinged ends, one of which is hinged to the sliding member, and the other is hinged to the upper fixing member.

8. The foldable double-layer trolley according to claim 1, characterized in that: A reinforcing rod is hinged between the third X-shaped contraction bracket of the side frame assembly and the upper connecting seat.

9. The foldable double-layer trolley according to claim 1, characterized in that: A rotating frame is rotatably connected to the rear vertical pipe.

10. The foldable double-layer trolley according to claim 1, characterized in that: A pull rod is rotatably connected to the front vertical pipe.

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