Double-layer rear door opening cart

Abstract

The utility model discloses a double-layer rear door opening cart which comprises a cart frame, and the cart frame comprises stand columns arranged at the four corners and two folding bottom frames. The four stand columns are movably riveted to the four corners of the folding bottom frame respectively. A rear blocking frame which can be turned over outwards to be opened is movably riveted between the two stand columns on the rear side. Through the opening arrangement of the rear blocking frame, the length of the cart is increased, and the transportation space is increased; due to the design of the double-layer folding bottom frame, an object placing plane is added, more different kinds of objects can be placed in a classified mode, and direct stacking of the objects is reduced.

Description

Technical Field

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

[0002] A trolley is used to carry items by pushing or pulling by manpower in environments where motor vehicles are inconvenient to use. Some existing trolleys are not foldable, while others are foldable. Foldable trolleys are more convenient for storage when not in use. A patent with publication number "CN218703305U" discloses a new type of folding trolley, in which a large bottom frame, a small bottom frame, a small top frame, a large top frame, and a plurality of supporting connecting rods, multi-bend connecting rods, and track pull tabs form a trolley frame body. A quick-release wheel set consisting of a wheel frame and wheels is arranged on the bottom surface of the trolley frame body. A retractable pull rod consisting of a lower telescopic rod, a pull rod clamp, a telescopic rod protective cover, an upper telescopic rod, and a handle is connected to the trolley frame body, and a cloth basket is arranged in the trolley frame body. However, the rear end of the foldable cart cannot be opened when it is unfolded, and items can only be placed or taken out from the upper end, which is not convenient enough. When loading and unloading long and thin items, the length of the items is greater than the length of the cart body, and the user needs to lift the goods to a higher height, and the rear side of the items is placed on the upper edge of the small top frame at the rear side. The rear side of the items is tilted high and is easy to move during transportation, and the placement is unstable, which is not conducive to safety. Summary of the invention

[0003] The utility model aims to provide a double-layer rear-door 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 double-layer rear-door cart, including a frame, the frame including columns arranged at four corners and two folding base frames; the four columns are movably riveted to the four corners of the folding base frame respectively; a rear gear frame that can be flipped outward and opened is movably riveted between the two rear columns.

[0005] Furthermore, the folding chassis includes a central seat and four bottom rods with one end movably riveted to the four corners of the central seat, and the other end of the bottom rod is movably riveted to the column.

[0006] Furthermore, a folding side frame is provided between two adjacent columns, the upper end of the folding side frame is movably riveted to the top of the column, and the lower end of the folding side frame is longitudinally movably connected to the column; and the folding bottom frame is located below the folding side frame.

[0007] Furthermore, the foldable side frame includes one or more X-shaped cross bars hinged on the same plane.

[0008] Furthermore, the frame also includes an upper fixing seat installed on the top of the column, and the upper end of the left or right side of the folding side frame is movably riveted to the upper fixing seat.

[0009] Furthermore, the frame also includes a lower fixing seat installed at the lower end of the column, and any corner of the lower folding frame is movably riveted to the lower fixing seat; the left and right sides of the lower end of the rear gear frame are respectively movably riveted to the two lower fixing seats.

[0010] Furthermore, a foldable support rod is provided between the two lower fixing seats on the front side or the rear side, and the support rod includes two short rods hinged at one end, and the other end of the short rod is movably riveted to the lower fixing seat; a roller is provided at the bottom of the column.

[0011] Furthermore, the frame also includes a handle, which includes an upper rod with a handle mounted on the top, a connecting seat and two lower rods symmetrically movably riveted to the left and right sides of the connecting seat, the upper rod is movably riveted to the connecting seat, and the bottom of the lower rod is movably riveted to the lower fixed seat.

[0012] Furthermore, a clamping slot is respectively provided on the left and right sides of the upper end of the rear gear frame, and when the rear gear frame is flipped to an upright state, the rear column is embedded in the clamping slot to fix the rear gear frame.

[0013] Furthermore, the rear gear frame includes two groups, each group includes a rear vertical rod, a cross rod, an upper horizontal rod and a fixing part, the fixing part is installed on the top of the rear vertical rod, the two cross rods are movably riveted, the upper end of each cross rod is hinged to one end of the upper horizontal rod, the other end of the upper horizontal rod is movably riveted to the connecting seat, and the lower end of the rear vertical rod is movably riveted to the lower end of the vertical rod.

[0014] By adopting the technical scheme of the utility model, the beneficial effects of the utility model are as follows: by opening the rear frame, the length of the cart is extended and the transportation space is increased; the double-layer folding bottom frame design increases the storage plane, and more different types of items can be placed by category, reducing the direct stacking of items; the rear frame, the folding bottom frame, and the folding side frames all adopt a foldable design, so that the entire cart can be folded and gathered, effectively reducing the volume of the frame, which is more conducive to storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional double-layer rear door cart. Figure 1 ;

[0016] Figure 2 It is a three-dimensional double-layer rear door cart. Figure 2 ;

[0017] Figure 3 It is a side view of a double-layer rear door cart;

[0018] Figure 4 It is a bottom view of a double-layer rear door trolley;

[0019] Figure 5 It is a three-dimensional diagram of the lower storage frame;

[0020] Figure 6 It is a perspective view of the upper storage frame.

[0021] In the figure: 1 column, 2 folding bottom frame, 21 center seat, 22 bottom rod, 3 rear gear frame, 31 slot, 32 rear vertical rod, 33 cross rod, 34 upper cross rod, 35 fixing piece, 4 folding side frame, 41 X-shaped cross rod, 42 side rod, 43 slider, 5 upper fixed seat, 6 lower fixed seat, 7 support rod, 71 short rod, 8 handle, 81 upper rod, 82 connecting seat, 83 lower rod, 84 handle, 9 roller, 10 lower storage frame, 11 upper storage frame, 11a rear side wall. 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, this embodiment discloses a double-layer rear-door cart, including a frame, wherein the frame includes columns 1 arranged at four corners and two folding base frames 2; the four columns 1 are movably riveted to the four corners of the folding base frames 2 respectively; a rear frame 3 that can be flipped outward and opened is movably riveted between the two rear columns 1, and the rear frame 3 is foldable.

[0024] The folding chassis 2 includes a center seat 21 and four bottom rods 22 with one end movably riveted to the four corners of the center seat, and the other end of the bottom rod 22 is movably riveted to the column 1. The center seat 21 is pulled upward to drive one end of the four bottom rods 22 to gather toward the middle, thereby pulling the four columns 1 together.

[0025] A folding side frame 4 is provided between two adjacent columns 1 , the upper end of the folding side frame 4 is movably riveted to the top of the column 1 , and the lower end of the folding side frame 4 is longitudinally movably connected to the column 1 ; the folding bottom frame 2 is located below the folding side frame 4 .

[0026] The folding side frame 4 includes one or more X-shaped cross bars 41 hinged on the same plane, and the X-shaped cross bars include two side bars 42 that are riveted movably. In this embodiment, the front and rear folding side frames 4 include two X-shaped cross bars 41, and the left and right folding side frames 4 include three X-shaped cross bars 41. The hinge of the two side bars 42 is achieved by two hinges that are symmetrically arranged on the left and right. One end (round) of the two hinges is riveted movably, and the other end (square) is embedded in the side bar 42 and fixed with fasteners such as screws. The side bar 42 is preferably a square tube. The two movably riveted side bars 42 allow each folding side frame 4 to be unfolded for use or gathered to reduce the volume.

[0027] A slider 43 is movably riveted to the lower end of the outermost side rod 42 of the folding side frame 4, and the slider 43 is sleeved on the column 1 and can slide up and down.

[0028] The frame also includes an upper fixing seat 5 installed on the top of the column 1 and a lower fixing seat 6 installed on the lower end of the column 1. The upper end of the left or right side of the folding side frame 3 is movably riveted to the upper fixing seat 5, and any corner of the lower folding bottom frame 2 is movably riveted to the lower fixing seat 6; the left and right sides of the lower end of the rear gear frame 3 are movably riveted to the two lower fixing seats 6 respectively.

[0029] A foldable support rod 7 is provided between the two lower fixing seats 6 at the front or rear side, and the support rod 7 includes two short rods 71 ​​hinged at one end, and the other end of the short rod is movably riveted to the lower fixing seat 6. A roller 9 is provided at the bottom of the column. When folded, the hinge of the two short rods 71 ​​arches upward, and the two short rods 71 ​​gradually come close to each other.

[0030] The frame also includes a handle 8, which includes an upper rod 81 with a handle mounted on the top, a connecting seat 82, and two lower rods 83 symmetrically riveted to the left and right sides of the connecting seat 82. The upper rod 81 is riveted to the connecting seat 82 and can rotate left and right along the connecting seat 82. The bottom of the lower rod 83 is riveted to the lower fixed seat 6 and can rotate forward and backward. A through hole is opened in the middle of the connecting seat 82, and the upper rod 81 passes through the through hole and can move up and down.

[0031] A clamping slot 31 is respectively provided on the left and right sides of the upper end of the rear gear frame 3 . When the rear gear frame 3 is turned over to be in an upright state, the rear pillar 1 is embedded in the clamping slot 31 to fix the rear gear frame 3 .

[0032] The rear gear frame 3 includes two groups, each group includes a rear vertical rod 32, a cross rod 33, an upper cross rod 34 and a fixing member 35, the fixing member 35 is installed on the top of the rear vertical rod 32, the two cross rods 33 are movably riveted, the upper end of each cross rod 33 is hinged to one end of the upper cross rod 34, the other end of the upper cross rod 34 is movably riveted to the fixing member 35, the lower end of the rear vertical rod 32 is movably riveted to the lower end of the vertical rod 1 and can be flipped forward and backward. The outer side of the lower fixing seat 6 is provided with an opening connected to the rear side and the upper side, the lower end of the vertical rod 32 is movably riveted in the opening and can be opened outward to be in a horizontal state, and can also be rotated inward to be in a vertical state, and the slot 31 at the upper end of the vertical rod 32 is detached from or stuck to the column 1.

[0033] An upper storage frame 10 and a lower storage frame 11 are respectively provided on the two folding chassis 2 of the frame, and the rear side wall 11a of the lower storage frame 11 can be flipped open. Velcro or straps and other fixing parts are provided on the four longitudinal edges of the lower storage frame 11 for fixing on the four pillars; Velcro is also provided on the upper edge of the rear side wall 11a, which is fixed to the upper cross bar 34 of the rear gear frame 3 by Velcro, and the side edge can also be fixed to the rear vertical bar 32 by Velcro. A mounting opening 10a with an opening facing downward is provided on the outer wall of the upper storage frame 10, and the mounting opening 10a covers the hinge of two adjacent cross bars. The upper storage frame 10 and the lower storage frame 11 are preferably made of washable Oxford cloth.

[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 double-layer rear door trolley, characterized in that: The vehicle frame comprises upright posts at four corners and two folding bottom frames; the four upright posts are respectively movably riveted to the four corners of the folding bottom frames; a rear frame that can be flipped outward and opened is movably riveted between the two rear upright posts; a clamping groove is respectively provided on the left and right sides of the upper end of the rear frame, and when the rear frame is flipped to an upright state, the upright posts at the rear side are embedded in the clamping groove to fix the rear frame.

2. A double-layer rear-door trolley according to claim 1, characterized in that: The folding base frame comprises a central seat and four bottom rods with one end movably riveted to four corners of the central seat, and the other end of the bottom rod is movably riveted to the column.

3. A double-layer rear-door trolley according to claim 1, characterized in that: A folding side frame is arranged between two adjacent columns, the upper end of the folding side frame is movably riveted to the top of the column, and the lower end of the folding side frame is longitudinally movably connected to the column; and the folding bottom frame is located below the folding side frame.

4. A double-layer rear-door trolley according to claim 3, characterized in that: The folding side frame includes one or more X-shaped cross bars hinged on the same plane.

5. A double-layer rear-door trolley according to claim 4, characterized in that: The frame also includes an upper fixing seat installed on the top of the column, and the upper end of the left side or right side of the folding side frame is movably riveted to the upper fixing seat.

6. A double-layer rear-door trolley according to claim 1, characterized in that: The frame also includes a lower fixing seat installed at the lower end of the column, and any corner of the lower folding frame is movably riveted to the lower fixing seat; the left and right sides of the lower end of the rear gear frame are movably riveted to the two lower fixing seats respectively.

7. A double-layer rear-door trolley according to claim 6, characterized in that: A foldable support rod is arranged between the two lower fixing seats at the front side or the rear side. The support rod comprises two short rods hinged at one end, and the other end of the short rod is movably riveted to the lower fixing seat. A roller is arranged at the bottom of the column.

8. The double-layer rear-door trolley according to claim 6, characterized in that: The frame also includes a handle, which includes an upper rod with a handle mounted on the top, a connecting seat and two lower rods symmetrically riveted to the left and right sides of the connecting seat, the upper rod is movably riveted to the connecting seat, and the bottom of the lower rod is movably riveted to the lower fixed seat.

9. A double-layer rear-door trolley according to any one of claims 1 to 8, characterized in that: The rear gear frame includes two groups, each group includes a rear vertical rod, a cross rod, an upper cross rod and a fixing piece, the fixing piece is installed on the top of the rear vertical rod, the two cross rods are movably riveted, the upper end of each cross rod is hinged to one end of the upper cross rod, the other end of the upper cross rod is movably riveted to the connecting seat, and the lower end of the rear vertical rod is movably riveted to the lower end of the vertical rod.

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