Handcart frame capable of not rising after being folded and handcart

Abstract

The utility model relates to the technical field of trolleys, in particular to a trolley frame not rising after being folded and a trolley, which comprises a plurality of stand columns with idler wheels at the bottoms, a bottom folding frame arranged between the stand columns, two second side frames and two first side frames. The first side frame and the second side frame are both telescopic scissor-type connecting rods, the two ends of each scissor-type connecting rod are connected to the two adjacent stand columns respectively, each scissor-type connecting rod comprises a plurality of sets of cross rods connected in sequence, and the cross rods connected with the stand columns form telescopic cross connecting rods. The telescopic cross connecting rod comprises a fixed rod and a telescopic rod capable of axially stretching out and drawing back, one end of the telescopic rod and one end of the fixed rod are hinged to the stand column, and the hinge point of the telescopic rod and the stand column is located above the hinge point of the fixed rod and the stand column; therefore, after the bicycle frame is folded, the height of the bicycle frame is basically not increased, the cost is saved, and the bicycle frame can be relatively stable in use.

Description

Technical Field

[0001] The utility model relates to the technical field of trolleys, in particular to a trolley frame and a trolley which does not rise after being folded. Background Art

[0002] As a convenient means of transportation, trolleys are widely used in daily life. With the advancement of technology, the frames of some trolleys are now designed to be foldable. When the trolleys are idle or need to be carried, the trolleys can be folded to reduce the space occupied by the frames.

[0003] In the related art, the side bracket of the frame of the trolley is generally a scissor-type connecting rod structure assembled by a plurality of cross rods, such as the trolley frame disclosed in the patent document with application number 2023234492009.

[0004] The above-mentioned frame still has defects in practical application. Specifically, the cross bars connected to the columns in the fork-shaped connecting rod are all telescopic cross bars, and the telescopic cross bars include two cross-hinged telescopic bars. Although such a design can ensure that the height of the frame will not increase after folding, the telescopic cross bar needs to be composed of two telescopic bars, which will increase the cost. Secondly, the cross bar composed of two telescopic bars has poor stability, which affects the stability of the frame. 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 trolley frame and a trolley that do not rise after being folded.

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

[0007] A trolley frame that does not rise after folding, comprising a plurality of columns with rollers at the bottom, a bottom folding frame arranged between the columns, and two second side frames arranged opposite to each other along a first direction and two first side frames arranged opposite to each other along a second direction; the first direction and the second direction are perpendicular; the first side frame and the second side frame are both telescopic scissor-type connecting rods, the two ends of the scissor-type connecting rods are respectively connected to two adjacent columns, the scissor-type connecting rods include a plurality of groups of cross rods connected in sequence, the cross rods connected to the columns constitute a telescopic cross connecting rod, the telescopic cross connecting rod includes a fixed rod and a telescopic rod that can be axially telescopic, the fixed rod and the telescopic rod are cross-hinged in the middle, one end of the telescopic rod and the fixed rod are hinged on the column, wherein the hinge point of the telescopic rod and the column is located above the hinge point of the fixed rod and the column.

[0008] As an optional implementation of the present invention, the telescopic rod comprises a first rod portion and a second rod portion which are capable of relative axial movement, wherein the second rod portion is hinged to the fixed rod.

[0009] As an optional embodiment of the utility model, the second rod portion is hinged to the fixed rod through an axis portion; the second rod portion is an internal hollow sleeve structure, and the first rod portion is movably arranged in the second rod portion; the first rod portion is provided with a movable groove extending along the length direction of the first rod portion; the axis portion passes through the movable groove and can slide relative to the movable groove along the length direction of the movable groove.

[0010] As an optional embodiment of the utility model, a second tube plug is fixed to the end of the second rod portion, and the first rod portion slides through the second tube plug, and / or a first tube plug is provided at the end of the first rod portion, and the first tube plug slides through the second rod portion.

[0011] As an optional implementation manner of the present invention, the shaft portion passes through the second pipe plug, so that the second pipe plug remains relatively fixed relative to the second rod portion.

[0012] As an optional implementation manner of the present invention, the first pipe plug is interference fit or punch point fixed with the first rod portion.

[0013] As an optional embodiment of the utility model, in the first side frame, the scissor-type connecting rod includes four groups of cross rods connected in sequence along a first direction, among which the two groups of cross rods located at both ends constitute the telescopic cross connecting rod, and the other two groups of cross rods constitute the fixed cross connecting rod.

[0014] As an optional embodiment of the utility model, in the first side frame, the lower connection points of the two fixed cross-linking rods are hinged with connecting pieces; the bottom folding frame includes two X-shaped folding frames, and the X-shaped folding frame includes a connecting seat and four bottom connecting rods, and the first ends of the bottom connecting rods are hinged to the connecting seat, wherein the second ends of two bottom connecting rods are respectively connected to the two columns, and the second ends of the other two bottom connecting rods are respectively hinged to the connecting pieces.

[0015] As an optional implementation of the present invention, in the second side frame, the scissor-type connecting rod includes two groups of cross rods connected in sequence along the second direction, wherein the two groups of cross rods both constitute telescopic cross connecting rods.

[0016] The utility model also provides a trolley, comprising the above-mentioned trolley frame which does not rise after being folded.

[0017] Compared with the prior art, the advantages of adopting this solution are:

[0018] Firstly, in this solution, a scissor-type connecting rod structure is used as the first side frame and the second side frame, and the cross rod connected to the column is formed into a telescopic cross connecting rod, so that the height of the frame will not increase substantially after being folded.

[0019] Secondly, in this solution, a telescopic cross-link is formed by a fixed rod and a telescopic rod. Compared with the method of using two telescopic rods to form a telescopic cross-link in the related art, it not only saves costs but also makes the frame more stable when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model in an unfolded state;

[0021] Figure 2 This is a front view of the first side frame of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the utility model in the folding process;

[0023] Figure 4 It is a structural schematic diagram of the utility model in a folded state;

[0024] Figure 5 It is a structural schematic diagram of the bottom folding frame of the utility model;

[0025] Figure 6 It is an exploded view of the telescopic rod of the utility model;

[0026] Figure 7 It is a partial cross-sectional view of the telescopic rod of the utility model. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] Example 1

[0030] See also Figure 1-7As shown, this embodiment provides a trolley frame that does not rise after being folded, including a plurality of columns 1 with rollers 11 at the bottom, a bottom folding frame arranged between the columns 1, and two second side frames 3 arranged opposite to each other along a first direction and two first side frames 2 arranged opposite to each other along a second direction; the first direction and the second direction are perpendicular to each other.

[0031] In this embodiment, Figure 1 As shown, four upright posts 1 are used, and the four upright posts 1 are opposite to each other in pairs; the first direction and the second direction can be understood as: when the frame is unfolded, Figure 1 As shown, the length direction of the frame is the first direction, and the width direction of the frame is the second direction; two first side frames 2 and two second side frames 3 are arranged above the bottom folding frame to form a main frame of the frame.

[0032] The bottom folding frame can be folded together when the first side frame 2 and the second side frame 3 are folded together. Figure 3 and Figure 4 Status shown.

[0033] Among them, the first side frame 2 and the second side frame 3 are both telescopic scissor-type connecting rods, and the two ends of the scissor-type connecting rods are respectively connected to two adjacent columns 1. The scissor-type connecting rods constituting the first side frame 2 can be telescopically folded along a first direction, and the scissor-type connecting rods constituting the second side frame 3 can be telescopically folded along a second direction.

[0034] The scissor-type connecting rod comprises a plurality of groups of cross rods connected in sequence, the cross rods being connecting rods cross-hinged in an X shape; wherein, Figure 1 As shown, in the first side frame 2, each cross rod is hinged in sequence along the first direction, and in the second side frame 3, each cross rod is hinged in sequence along the second direction.

[0035] In addition, if Figure 1 and Figure 2 As shown, the cross rod directly connected to the column 1 constitutes a telescopic cross link 4, which includes a fixed rod 41 and a telescopic rod 42 that can be axially telescopic. The fixed rod 41 here does not mean that it is fixed, but is relative to the telescopic rod 42, that is, it cannot be telescopic.

[0036] The fixed rod 41 and the telescopic rod 42 are cross-hinged in the middle to form an X-shaped connecting rod structure, and one end of the telescopic rod 42 and the fixed rod 41 are hinged on the adjacent column 1, wherein the hinge point of the telescopic rod 42 and the column 1 is located above the hinge point of the fixed rod 41 and the column 1.

[0037] A scissor-type connecting rod structure is used as the first side frame 2 and the second side frame 3, and the cross rod connected to the column 1 forms a telescopic cross connecting rod 4, so that the height of the frame will not increase substantially after being folded.

[0038] In addition, in this embodiment, the telescopic cross link 4 is composed of a fixed rod 41 and a telescopic rod 42. Compared with the method of using two telescopic rods 42 to form the telescopic cross link 4 in the related art, it not only saves costs but also makes the frame more stable when in use.

[0039] In this embodiment, Figure 6 and Figure 7 As shown, the telescopic rod 42 includes a first rod portion 422 and a second rod portion 421 which can move relative to an axial direction (the axial direction here can also be understood as the length direction of the telescopic rod 42). Specifically, the second rod portion 421 is an internally hollow sleeve structure, and the first rod portion 422 is movably arranged in the second rod portion 421 along the length direction of the second rod portion 421, so that the first rod portion 422 can be telescopically movable in the second rod portion 421 along the length direction of the second rod portion 421.

[0040] Among them, Figure 2 As shown, the second rod portion 421 is hinged to the fixed rod 41. Specifically, the second rod portion 421 is hinged to the fixed rod 41 through an axis portion 44. For example, a rivet perpendicular to the length direction of the second rod portion 421 is passed between the second rod portion 421 and the fixed rod 41, and the aforementioned axis portion 44 is formed by the rivet, so that the second rod portion 421 and the fixed rod 41 can rotate relative to each other around the axis portion 44.

[0041] In order to ensure that the existence of the shaft portion 44 does not interfere with the relative expansion and contraction between the first rod portion 422 and the second rod portion 421, in this embodiment, Figure 6 and Figure 7 As shown, the first rod portion 422 is provided with a movable groove 4221 extending along the length direction of the first rod portion 422, and the movable groove 4221 is mainly used to avoid the shaft portion 44 when the telescopic rod 42 is extended and retracted. The shaft portion 44 passes through the movable groove 4221 and can slide relative to the movable groove 4221 along the length direction of the movable groove 4221.

[0042] In addition, in this embodiment, a second tube plug 4211 is fixed to the end of the second rod portion 421. The second tube plug 4211 is hollow inside to form a channel. The first rod portion 422 slides through the second tube plug 4211 through the channel. At this time, the second tube plug 4211 is equivalent to the sliding sleeve of the first rod portion 422. The first rod portion 422 can slide linearly in the second tube plug 4211; the second tube plug 4211 is preferably a plastic part.

[0043] The reason why the second tube plug 4211 is provided as the sliding structure of the first rod portion 422 instead of directly movably inserting the first rod portion 422 into the second rod portion 421 for sliding is that if the first rod portion 422 is directly movably inserted into the second rod portion 421 for sliding, since the first rod portion 422 and the second rod portion 421 are generally metal parts, greater friction and wear will be generated between the two when they slide relative to each other. Therefore, in this embodiment, a second tube plug 4211 of a plastic part is provided as the sliding structure of the first rod portion 422. In this way, when the first rod portion 422 slides in the second rod portion 421, the first rod portion 422 basically does not contact the second rod portion 421, which is beneficial to reduce the friction damage between the first rod portion 422 and the second rod portion 421.

[0044] The second tube plug 4211 and the second rod body 421 may be fixed to each other in such a manner that the shaft portion 44 passes through the second tube plug 4211 so that the second tube plug 4211 remains relatively fixed relative to the second rod portion 421. In this way, the shaft portion 44 not only serves as a hinge axis between the telescopic rod 42 and the fixed rod 41, but also serves as a fixing member between the second tube plug 4211 and the second rod portion 421 to limit the second tube plug 4211 from coming off the second rod portion 421.

[0045] In addition, in this embodiment, a first pipe plug 43 is provided at the end of the first rod portion 422, and the first pipe plug 43 is slidably inserted into the second rod portion 421; the first pipe plug 43 can also be a plastic part, wherein the first pipe plug 43 and the first rod portion 422 are relatively fixed, for example:

[0046] The first tube plug 43 is interference fit with the first rod portion 422. For example, the first rod portion 422 is a tube structure, and the first tube plug includes an insertion portion 432 and a sliding portion 431, wherein the insertion portion 432 is inserted into the first rod portion 422 and is interference fit with the first rod portion 422 to achieve relative fixation of the first tube plug 43 and the first rod portion 422; the sliding portion 431 extends out of the end side of the first rod portion 422 and is used to be slidably inserted into the second rod portion 421.

[0047] Of course, in other optional implementations, the first rod portion 422 and the first pipe plug 43 may also be fixed by punching points or screws, which is not specifically limited here.

[0048] In this embodiment, by providing the first tube plug 43 and the second tube plug 4211, two sliding support points are formed between the first rod portion 422 and the second rod portion 421, namely the first tube plug 43 and the second tube plug 4211, so that the sliding connection between the first rod portion 422 and the second rod portion 421 is more stable.

[0049] In this embodiment, the structures of the two first side frames 2 are basically the same, and the structures of the two second side frames 3 are also basically the same, so the following only takes one of the first side frames 2 and the second side frames 3 as an example for specific description:

[0050] The first side frame 2 is specifically constructed as follows: Figure 2 As shown, in the first side frame 2, the scissor-type connecting rod includes four groups of cross rods connected in sequence along a first direction. Among the four groups of cross rods, two groups of cross rods located at both ends constitute the telescopic cross link 4, and the other two groups of cross rods constitute the fixed cross link 5. The fixed cross link 5 includes two rod bodies 51, and the middle parts of the two rod bodies 51 are cross-hinged to form an X-shaped connecting rod structure.

[0051] In the first side frame 2, as Figure 2 As shown, the two fixed cross links 5 are located between the two telescopic cross links 4, one end of the first rod portion 422 away from the second rod portion 421 is hinged at the upper end of the column 1, and the first end of the fixed rod 41 is hinged at the lower part of the column 1; the two fixed cross links 5, the fixed cross link 5 located on the left side, the left ends of its two rod bodies 51 are respectively hinged to the second end of the fixed rod 41 and the end of the second rod portion 421 in the telescopic cross link 4 on the left side; the fixed cross link 5 located on the right side, the two ends of its right side are respectively hinged to the second end of the fixed rod 41 and the end of the second rod portion 421 in the telescopic cross link 4 on the right side; in addition, the right ends of the two rod bodies 51 of the fixed cross link 5 on the left side are respectively hinged to the left ends of the two rod bodies 51 of the fixed cross link 5 on the right side.

[0052] In addition, in the first side frame 2, as Figure 1 As shown, a connecting piece 7 is hinged at the lower connection point of the two fixed cross links 5 ; wherein the hinge point between the connecting piece 7 and the two fixed cross links 5 coincides with the lower hinge point of the two fixed cross links 5 .

[0053] The specific structure of the second side frame 3 is as follows:

[0054] like Figure 1 As shown, in the second side frame 3, the scissor-type connecting rod includes two groups of cross rods connected in sequence along the second direction, and the two groups of cross rods are the aforementioned telescopic cross connecting rods 4; wherein, one end of the two fixed rods 41 is hinged to each other, and the other end is respectively hinged to the bottom of the two columns 1; the ends of the two second rod portions 421 are hinged to each other, and the ends of the two first rod portions 422 are respectively hinged to the top of the two columns 1.

[0055] Combination Figure 1 and Figure 5As shown, the bottom folding frame includes two X-shaped folding frames 6 with the same structure, and the X-shaped folding frame includes a connecting seat 62 and four bottom connecting rods 61, and the four connecting rods are distributed in an X shape; in one X-shaped folding frame 6, the first end of the bottom connecting rod 61 is hinged to the connecting seat 62, so that the bottom connecting rod 61 can be turned up and down relative to the connecting seat 62, wherein the second ends of two bottom connecting rods 61 are respectively connected to the bottom of the two columns 1, and the second ends of the other two bottom connecting rods 61 are respectively hinged to the connecting member 7. In this way, when the frame is folded, the first side frame 2 is folded and retracted along the first direction, and the second side frame 3 is folded and retracted along the second direction, and at the same time, the bottom folding frame will move upward and close to the middle to achieve folding, presenting as shown in the figure. Figure 3 to Figure 4 Shown in folded state.

[0056] Example 2

[0057] like Figure 1-7 As shown, this embodiment further provides a trolley based on the embodiment 1, including a trolley frame provided in the embodiment that does not rise after folding. Of course, generally such a trolley will also be provided with a bag (not shown in the figure), which is mounted on the frame as a space for storing items.

[0058] 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 trolley frame that does not rise after folding, comprising a plurality of columns with rollers at the bottom, a bottom folding frame arranged between the columns, and two second side frames arranged opposite to each other along a first direction and two first side frames arranged opposite to each other along a second direction; the first direction and the second direction are perpendicular; the first side frame and the second side frame are both telescopic scissor-type connecting rods, the two ends of the scissor-type connecting rods are respectively connected to two adjacent columns, and the scissor-type connecting rods include a plurality of groups of cross rods connected in sequence, characterized in that: The cross rods connected to the columns constitute telescopic cross links, which include fixed rods and telescopic rods that can be axially telescopic. The fixed rods and the telescopic rods are cross-hinged in the middle, and one end of the telescopic rod and the fixed rod are hinged on the column, wherein the hinge point of the telescopic rod and the column is located above the hinge point of the fixed rod and the column.

2. A trolley frame that does not rise after folding according to claim 1, characterized in that: The telescopic rod comprises a first rod portion and a second rod portion which can move axially relative to each other, wherein the second rod portion is hinged to the fixed rod.

3. A trolley frame that does not rise after folding according to claim 2, characterized in that: The second rod portion is hinged to the fixed rod through an axis portion; the second rod portion is an internally hollow sleeve structure, and the first rod portion is movably arranged in the second rod portion; the first rod portion is provided with a movable groove extending along the length direction of the first rod portion; the axis portion passes through the movable groove and can slide relative to the movable groove along the length direction of the movable groove.

4. A trolley frame that does not rise after folding according to claim 3, characterized in that: A second pipe plug is fixed at the end of the second rod portion, and the first rod portion slidably passes through the second pipe plug, and / or a first pipe plug is provided at the end of the first rod portion, and the first pipe plug is slidably inserted into the second rod portion.

5. A trolley frame that does not rise after folding according to claim 4, characterized in that: The shaft portion passes through the second pipe plug, so that the second pipe plug is relatively fixed relative to the second rod portion.

6. A trolley frame that does not rise after folding according to claim 4, characterized in that: The first pipe plug is interference fit or punch point fixed with the first rod portion.

7. A trolley frame that does not rise after folding according to claim 1, characterized in that: In the first side frame, the scissor-type connecting rod includes four groups of cross rods connected in sequence along a first direction. Among the four groups of cross rods, two groups of cross rods located at both ends constitute the telescopic cross rods, and the other two groups of cross rods constitute the fixed cross rods.

8. A trolley frame that does not rise after folding according to claim 7, characterized in that: In the first side frame, the lower connection points of the two fixed cross-links are hinged with connecting pieces; the bottom folding frame includes two X-shaped folding frames, and the X-shaped folding frame includes a connecting seat and four bottom connecting rods, the first ends of the bottom connecting rods are hinged to the connecting seat, the second ends of two bottom connecting rods are respectively connected to the two columns, and the second ends of the other two bottom connecting rods are respectively hinged to the connecting pieces.

9. A trolley frame that does not rise after folding according to claim 1, characterized in that: In the second side frame, the scissor-type connecting rod comprises two groups of cross rods connected in sequence along the second direction, wherein the two groups of cross rods both constitute telescopic cross connecting rods.

10. A trolley, characterized in that: It comprises a trolley frame which does not rise after being folded as described in any one of claims 1 to 9.

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