Transport vehicle capable of not rising after being folded in gathering mode

Abstract

The utility model relates to the technical field of transport vehicles, in particular to a gathering type transport vehicle capable of not rising after being folded, which comprises a bottom frame capable of being folded and a plurality of side frames arranged on the peripheral side of the upper portion of the bottom frame in a surrounding mode, and a vertical column extending vertically is arranged between every two adjacent side frames. Each side frame comprises one or more folding connecting rod mechanisms which are hinged in sequence, and the two ends of each side frame are hinged to the stand columns on the two sides of the side frame respectively; the folding connecting rod mechanism comprises two first connecting rods, two second connecting rods and two third connecting rods; one ends of the two first connecting rods are hinged to form a first hinge point; the two second connecting rods are hinged to form a second hinge point, and the first hinge point is located below the second hinge point. One end of each third connecting rod is hinged to the second hinge point, and the other end of each third connecting rod is hinged to the middle of the corresponding first connecting rod to form a third hinge point; the structure is stable, and the bearing capacity of a vehicle body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transport vehicles, in particular to a transport vehicle which does not rise after being folded. Background Art

[0002] With the development of technology, there are many portable transport vehicles on the market that can be used to load some items for transportation. In the related art, in order to facilitate the carrying or packaging of the transport vehicle, the frames of some transport vehicles are designed to be foldable structures, so that the frames can be folded to reduce the volume of the frames for easy carrying or packaging.

[0003] In addition, some transport vehicles are foldable. In order to ensure that the height of the transport vehicle does not increase substantially after folding, the relevant technology designs the frame of the transport vehicle as a folding connecting rod structure that does not increase in height after folding. For example, the patent document with announcement number CN220785822U discloses a foldable, non-heightening gathering cart.

[0004] Although the above-mentioned stroller can basically maintain the height of the vehicle body after folding, it still has defects in actual use, mainly reflected in the following aspects: firstly, a vertical column tube (not the column tube at the four corners) needs to be added in the middle of the folding link mechanism, which will increase the number of hinge points of the entire link mechanism, thereby affecting the stability of the entire frame; secondly, in the folding link mechanism (as shown in the above-mentioned document attached), the vertical column tube is not provided in the middle of the folding link mechanism, so that the number of hinge points of the entire link mechanism is increased, which will affect the stability of the entire frame; secondly, in the folding link mechanism (as shown in the above-mentioned document attached), the vertical column tube is provided in the middle of the folding link mechanism, so that ... Figure 4 As shown in the figure, the two connecting rods are staggered in distribution up and down. At this time, the two connecting rods and the second connecting pipes connected thereto are equivalent to forming a quadrilateral connecting rod structure, so the stability is poor; therefore, there is still room for improvement. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a transport vehicle of a gathering type that does not rise after being folded.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A transport vehicle that does not rise after being folded comprises a base frame that can be folded and closed, and a plurality of side frames arranged around the upper circumference of the base frame, vertically extending columns are provided between adjacent side frames, and rollers are provided at the bottom of the columns; the side frames can be telescoped along their own length direction to be unfolded or folded, and each of the side frames comprises one or more folding connecting rod mechanisms that are hinged in sequence, and the two ends of the side frames are respectively hinged to the columns on both sides thereof; the folding connecting rod mechanisms comprise two first connecting rods, two second connecting rods and two third connecting rods; one end of the two first connecting rods is hinged to form a first hinge point; the two second connecting rods are hinged to form a second hinge point, and the first hinge point is located below the second hinge point; one end of the two third connecting rods is hinged at the second hinge point, and the other ends of the two third connecting rods are respectively hinged to the middle parts of the two first connecting rods to form a third hinge point; the first connecting rod and the second connecting rod form a cross between the first hinge point and the third hinge point.

[0008] As an optional embodiment of the utility model, the side frames include four groups, two groups of side frames are arranged opposite to each other in the longitudinal direction to form two first side frames, and the other two groups of side frames are arranged opposite to each other in the transverse direction to form two second side frames; the four groups of side frames are combined on the upper side of the base frame to form a rectangular frame structure, and four columns are provided and are respectively located at the four corners of the rectangular frame.

[0009] As an optional embodiment of the present invention, the second side frame includes a group of the folding link mechanisms. In the second side frame, one end of the two first links away from the first hinge point is respectively hinged to the upper parts of the two adjacent columns; one end of the two second links away from the second hinge point is respectively hinged to the lower parts of the two adjacent columns.

[0010] As an optional embodiment of the utility model, the first side frame includes two groups of the folding link mechanisms, and the two groups of folding link mechanisms are sequentially arranged in the transverse direction; one end of the two first links of the folding link mechanism is hinged to form a first V-shaped link, and one end of the two second links is hinged to form a second V-shaped link;

[0011] In the two folding link mechanisms in the first side frame: one end of the two first V-shaped links is hinged, and the other end is hinged to the upper part of the adjacent columns; one end of the two second V-shaped links is hinged to form a fourth hinge point, and the other end is hinged to the lower part of the adjacent columns.

[0012] As an optional embodiment of the utility model, a connecting piece is hinged at the fourth hinge point; the base frame includes two groups of X-shaped folding frames connected in sequence along the transverse direction; the X-shaped folding frame includes a support base and four bottom connecting rods whose first ends are hinged to the support base; among the four bottom connecting rods, the second ends of two bottom connecting rods are respectively hinged to the bottom of two adjacent columns, and the second ends of the other two bottom connecting rods are hinged to the connecting piece.

[0013] As an optional implementation manner of the present utility model, the connecting member includes two connecting ears, and the second end of the bottom connecting rod is hinged on the connecting ears.

[0014] Compared with the prior art, the advantages of adopting this solution are:

[0015] Firstly, in the folding link mechanism constituting the side frame in the present solution, compared with the existing link mechanism method in which a pillar tube needs to be added in the middle of the frame, there is no need to add a pillar tube in the folding link mechanism, so that the hinge points in the folding link mechanism can be relatively reduced, thereby making the frame more stable. Moreover, the present solution can also ensure that the transport vehicle can be folded and gathered, and after folding, the overall height of the frame will basically not increase.

[0016] In addition, in the present solution, in the folding link mechanism, the two third links are hinged together at one end, and are hinged to the two first links at the other end. In this way, when the transport vehicle is in the unfolded state, the two third links and the two first links are equivalent to forming a triangular structure, which is beneficial to improving stability and increasing the load-bearing capacity of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model in the unfolded state;

[0018] Figure 2 This is a front view of the first side frame of the utility model in an unfolded state;

[0019] Figure 3 It is a top view of the utility model in the unfolded state;

[0020] Figure 4 It is a schematic diagram of the structure of the utility model during the folding process;

[0021] Figure 5 It is a schematic diagram of the structure of the utility model in a folded state. DETAILED DESCRIPTION

[0022] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0023] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0024] See also Figure 1-5 As shown, this embodiment provides a transport vehicle of a gathered type that does not rise after being folded, including a base frame 300 that can be folded together, and a plurality of side frames arranged around the upper side of the base frame 300. The base frame 300 is equivalent to the chassis of the transport vehicle, and the side frames are equivalent to the side walls of the transport vehicle, and a space is formed between the two for the vehicle bag to be inserted.

[0025] In this embodiment, a vertically extending column 4 is provided between adjacent side frames, and a roller 41 is provided at the bottom of the column 4; the side frame can be telescoped along its own length direction to be unfolded or folded.

[0026] As a specific implementation method, the transport vehicle in this embodiment is basically of a rectangular structure, and the side frames specifically include four groups, two groups of side frames are arranged opposite to each other along the longitudinal direction to form two first side frames 100, and the other two groups of side frames are arranged opposite to each other along the transverse direction to form two second side frames 200; it is worth noting that the transverse and longitudinal directions in this embodiment can also be understood as: when the transport vehicle is in the unfolded state, the length direction of the transport vehicle is the transverse direction, and the corresponding width direction of the transport vehicle is the longitudinal direction, so that the two first side frames 100 are equivalent to the side walls on the front and rear sides of the transport vehicle, and the two second side frames 200 are the side walls on the left and right sides of the transport vehicle.

[0027] like Figure 1 As shown, four groups of side frames are surrounded on the upper side of the base frame 300 to form a rectangular frame structure, and four columns 4 are provided and respectively located at the four corners of the rectangular frame; the two ends of the side frame are respectively hinged to the columns 4 on both sides thereof.

[0028] In this embodiment, Figure 1 and Figure 2 As shown, each of the side frames includes one or more folding link mechanisms 10 which are hinged in sequence. For example, in this embodiment, the first side frame 100 includes two folding link mechanisms 10, while the first side frame 100 includes only one folding link mechanism 10, which will be described in detail later.

[0029] In this embodiment, the folding link mechanisms 10 are basically the same, so in this embodiment, one of the folding link mechanisms 10 is taken as an example for specific description:

[0030] like Figure 2 As shown, the folding link mechanism 10 includes two first links 1 , two second links 2 and two third links 3 .

[0031] One ends of the two first connecting rods 1 are hinged to form a first hinge point J1. At this time, the two first connecting rods 1 form a first V-shaped connecting rod 11 with the first hinge point J1 as the vertex, and the vertex faces downward.

[0032] One ends of the two second connecting rods 2 are hinged to form a second hinge point J2. At this time, the two second connecting rods 2 form a second V-shaped connecting rod 21 with the second hinge point J2 as the vertex, and the vertex faces upward.

[0033] In addition, the first hinge point J1 is located below the second hinge point J2.

[0034] One end of the two third links 3 is hinged at the second hinge point J2, and the other ends of the two third links 3 are respectively hinged to the middle parts of the two first links 1 to form a third hinge point J3, and the first link 1 and the second link 2 form an intersection between the first hinge point J1 and the third hinge point J3. It is worth noting that the so-called intersection here refers to the first link 1 and the second link 2 intersecting in space in an X shape, and the intersection position of the first link 1 and the second link 2 is free of any connection constraints.

[0035] Through the above arrangement, the first side frame 100 can be expanded and folded by telescoping the first side frame 100 in the lateral direction, and the second side frame 200 can be expanded and folded by telescoping the second side frame 200 in the longitudinal direction. At the same time, in conjunction with the expansion and folding of the base frame 300, the entire transport vehicle can be gathered together and folded, or unfolded for use.

[0036] Moreover, such a folding mechanism can ensure that the height of the transport vehicle will not increase substantially after being folded. Figure 4 and Figure 5 shown.

[0037] In addition, in the folding link mechanism 10 constituting the side frame in this embodiment, compared with the existing link mechanism method that requires an additional pillar tube in the middle of the frame, there is no need to add a pillar tube to the folding link mechanism 10, which can relatively reduce the number of hinge points in the folding link mechanism 10, thereby making the stability of the frame better.

[0038] Finally, in each folding link mechanism 10 of this embodiment, Figure 2 As shown, the two third links 3 are hinged together at one end, and are hinged to the two first links 1 at the other end. In this way, when the transport vehicle is in the unfolded state, the two third links 3 and the two first links 1 are equivalent to forming a triangle-like structure. At this time, the first hinge point J1 and the two third hinge points J3 are equivalent to the three vertices of the triangle, which is beneficial to improving stability and improving the load-bearing capacity of the vehicle body.

[0039] In this embodiment, the connection structure of each component is specifically described by taking the first side frame 100 using two sets of folding link mechanisms 10, which are hinged in sequence along the lateral direction; and the second side frame 200 using one set of folding link mechanisms 10 as an example:

[0040] like Figure 2 As shown, in the first side frame 100: one end of the two first V-shaped connecting rods 11 is hinged to each other, and the other end is hinged to the upper part of the adjacent column 4; one end of the two second V-shaped connecting rods 21 is hinged to each other to form a fourth hinge point J4, and the other end is hinged to the lower part of the adjacent column 4.

[0041] like Figure 1 As shown, in the second side frame 200, one end of the two first connecting rods 1 away from the first hinge point J1 is respectively hinged to the upper part of the two adjacent columns 4; one end of the two second connecting rods 2 away from the second hinge point J2 is respectively hinged to the lower part of the two adjacent columns 4; it can also be understood as:

[0042] In the second side frame 200 , two ends of the first V-shaped connecting rod 11 are respectively hinged to the upper parts of the columns 4 on both sides, and two ends of the second V-shaped connecting rod 21 are respectively hinged to the lower parts of the columns 4 on both sides.

[0043] In this embodiment, Figure 1 and Figure 3 As shown, the base frame 300 includes two groups of X-shaped folding frames connected in sequence along the transverse direction, and a connecting member 5 is hinged at the fourth hinge point J4. The connecting member 5 is provided with two connecting ears 51 arranged side by side.

[0044] like Figure 3 As shown, the X-shaped folding frame includes a support base 301 and four bottom connecting rods 302 distributed in an X shape around the support base 301; the first ends of the bottom connecting rods 302 are hinged on the support base 301, so that the bottom connecting rods 302 can be flipped downward relative to the support base 301, so that when folding, each bottom connecting rod 302 can be flipped, folded and closed at the lower side of the support base 301, as shown in FIG. Figure 4 and Figure 5 shown.

[0045] In addition, in this embodiment, Figure 1 and Figure 3 As shown, among the four bottom connecting rods 302, the second ends of two bottom connecting rods 302 are respectively hinged to the bottoms of the two adjacent columns 4, and the second ends of the other two bottom connecting rods 302 are hinged to the connecting ears 51 of the connecting member 5 on both sides; in other words, the two connecting ears 51 on the connecting member 5 are respectively hinged for the second ends of the two bottom connecting rods 302 of the two X-shaped folding frames.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A transport vehicle that does not rise after being folded, comprising a foldable bottom frame, and a plurality of side frames arranged around the upper circumference of the bottom frame, with vertically extending columns arranged between adjacent side frames, and rollers arranged at the bottom of the columns; the side frames can be extended and retracted along their own length direction to be unfolded or folded, characterized in that: Each of the side frames includes one or more folding link mechanisms that are hinged in sequence, and the two ends of the side frames are respectively hinged to the columns on both sides thereof; the folding link mechanism includes two first links, two second links and two third links; one end of the two first links is hinged to form a first hinge point; one end of the two second links is hinged to form a second hinge point, and the first hinge point is located below the second hinge point; one end of the two third links is hinged at the second hinge point, and the other ends of the two third links are respectively hinged to the middle parts of the two first links to form a third hinge point; the first link and the second link form a cross between the first hinge point and the third hinge point.

2. A transport vehicle that does not rise after being folded according to claim 1, characterized in that: The side frames include four groups, two of which are arranged opposite to each other in the longitudinal direction to form two first side frames, and the other two groups of side frames are arranged opposite to each other in the transverse direction to form two second side frames; the four groups of side frames are surrounded on the upper side of the base frame to form a rectangular frame structure, and four columns are arranged and respectively located at the four corners of the rectangular frame.

3. A transport vehicle that does not rise after being folded according to claim 2, characterized in that: The second side frame includes a group of folding link mechanisms. In the second side frame, one end of the two first links away from the first hinge point is respectively hinged to the upper parts of the two adjacent columns; one end of the two second links away from the second hinge point is respectively hinged to the lower parts of the two adjacent columns.

4. A transport vehicle that does not rise after being folded according to claim 2 or 3, characterized in that: The first side frame comprises two groups of folding link mechanisms, which are arranged in sequence in the transverse direction; one end of two first links of the folding link mechanism is hinged to form a first V-shaped link, and one end of two second links is hinged to form a second V-shaped link; In the two folding link mechanisms in the first side frame: one end of the two first V-shaped links is hinged, and the other end is hinged to the upper part of the adjacent columns; one end of the two second V-shaped links is hinged to form a fourth hinge point, and the other end is hinged to the lower part of the adjacent columns.

5. A transport vehicle that does not rise after being folded according to claim 4, characterized in that: A connecting piece is hinged at the fourth hinge point; the base frame includes two groups of X-shaped folding frames connected in sequence along the transverse direction; the X-shaped folding frame includes a support base and four bottom connecting rods whose first ends are hinged to the support base; among the four bottom connecting rods, the second ends of two bottom connecting rods are respectively hinged to the bottoms of two adjacent columns, and the second ends of the other two bottom connecting rods are hinged to the connecting piece.

6. A transport vehicle that does not rise after being folded according to claim 5, characterized in that: The connecting member comprises two connecting ears, and the second end of the bottom connecting rod is hinged on the connecting ears.

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