Improved structure of folding trailer

Abstract

According to the improved structure of the folding trailer, a folding trailer frame comprises four vertical rods, four side face folding connecting rod sets and a bottom bracing folding connecting rod set, and the bottom bracing folding connecting rod set comprises two cross-shaped storage connecting rods arranged front and back; the left end and the right end of the rear portion of the front side cross-shaped storage connecting rod are hinged to the left end and the right end of the front portion of the rear side cross-shaped storage connecting rod in a matched mode to form two bottom connecting points distributed left and right. V-shaped connecting rods are arranged at the lower parts of middle cross rods of the left and right side folding connecting rod groups of the four side surface folding connecting rod groups; the two ends of the upper portion of the V-shaped connecting rod are hinged to the front side and the rear side of the lower portion of the middle cross rod on the same side respectively, and the lower hinge point of the V-shaped connecting rod is matched with the bottom connecting point on the same side in a hinged mode. By arranging the V-shaped connecting rods, the bottom connecting points between the two cross-shaped storage connecting rods can be connected and supported, it is ensured that the folding frame is folded and unfolded smoothly, the use convenience of the trailer is improved, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of trailers, in particular to an improved structure of a folding trailer. Background Art

[0002] In daily life and production, it is often necessary to carry luggage or items, etc. During the carrying process, trailer tools are often used. Due to the characteristics of being convenient to push, time-saving and labor-saving, trailer tools are widely used when carrying things. In order to facilitate the storage of trailer tools, the trailer tools are designed into a foldable structure, which is very light. After folding, it can be placed on the vehicle and is convenient to carry.

[0003] Traditional trailers, such as a bundled luggage cart disclosed in Chinese Patent Publication No. CN103587562B, have a bottom support structure composed of four bottom beams and an intermediate support, and can be unfolded or folded in cooperation with the front frame, rear frame and side frame.

[0004] However, traditional trailers have the defect of a small volume. Thus, a portable folding trailer disclosed in Chinese Patent Publication No. CN108725533B has two sets of radial mechanisms (equivalent to two bottom support structures), which can expand the volume of the trailer. However, multiple sets of bottom support structures will cause a decrease in the load-bearing capacity of the trailer structure and the bottom support structure is prone to deformation. Thus, there is also a new type of camping cart disclosed in Chinese Patent Publication No. CN215752510U. In this solution, there are also two sets of bottom support structures at the bottom. And in order to ensure that the bottom support structure remains horizontal, support telescopic tubes are arranged in the middle of the left and right sides of the bottom support structure and are connected to the left and right side folding link mechanisms to assist in supporting the bottom support structure. However, there is a hidden danger that the support telescopic tubes may not slide smoothly, which is likely to affect the subsequent folding, closing or unfolding of the trailer, resulting in inconvenience in using the trailer. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an improved structure of a folding trailer, which has the advantages of large capacity and convenient unfolding and folding.

[0006] To achieve the above object, the solution of the utility model is:

[0007] An improved structure of a folding trailer, the folding frame of which comprises four vertical rods, four side folding link groups and a bottom support folding link group. The front, rear, left and right ends of the bottom support folding link group are respectively hinged to the lower parts of the four vertical rods. The four side folding link groups are distributed between the four vertical rods and enclose a frame shape. The lower ends of each side folding link group are hinged to the lower parts of the adjacent vertical rods, and the upper ends are slidably connected to the upper parts of the vertical rods.

[0008] The bottom support folding link group includes two cross storage links arranged front and back. The left and right ends of the rear part of the front cross storage link are respectively hinged with the left and right ends of the front part of the rear cross storage link to form two bottom connection points distributed left and right.

[0009] The four side folding link groups are divided into a front side folding link group, a rear side folding link group, a left side folding link group, and a right side folding link group.

[0010] The left side folding link group and the right side folding link group have the same structure, and both include three cross bars hinged in sequence from front to middle to back. And a V-shaped link is provided at the lower part of the middle cross bar.

[0011] The upper ends of both sides of the V-shaped link are respectively hinged with the front and rear sides of the lower part of the middle cross bar on the same side, and the lower hinge point of the V-shaped link is hinged with the bottom connection point on the same side.

[0012] Furthermore, the upper ends of both sides of the V-shaped link hinged with the lower part of the middle cross bar also extend upward to form extension bars. The upper end of the extension bar on the front side of the V-shaped link is hinged with the rear side of the upper part of the front cross bar, and the upper end of the extension bar on the rear side of the V-shaped link is hinged with the front side of the upper part of the rear cross bar.

[0013] Furthermore, the V-shaped link includes a front side sub-link and a rear side sub-link, and the front side sub-link and the rear side sub-link are respectively distributed on the left and right sides of the middle cross bar on the same side.

[0014] Furthermore, the front side folding link group and the rear side folding link group have the same structure, and both include two groups of cross links. The two groups of cross links are connected left and right and symmetrically arranged.

[0015] Furthermore, walking wheels are respectively provided at the bottoms of the vertical rods.

[0016] Furthermore, a front bottom rod is also hinged to the lower parts of the two front vertical rods, and a handle is hinged to the middle of the front bottom rod.

[0017] Furthermore, a first hinge seat is provided at the lower part of the vertical rod for hinging the front end or the rear end of the bottom support folding link group, the lower end of the side folding link group, and the front bottom rod.

[0018] Furthermore, a first sliding seat is provided at the upper part of the vertical rod. The first sliding seat is sleeved on the upper area of the vertical rod and can slide up and down. The first sliding seat is used for hinging the upper ends of the side folding link groups.

[0019] Furthermore, a connecting piece is provided at the bottom connection point. The front and rear sides of the connecting piece are for the ends on the same side of the front cross storage link and the rear cross storage link to be hinged; and the lower hinge point of the V-shaped link is hinged with the middle of the connecting piece.

[0020] Furthermore, the cross-shaped storage connecting rod includes a middle hinge seat and four bottom sub-rods radially hinged to the lower part of the middle hinge seat in a cross shape.

[0021] After adopting the above technical solution, by providing two cross-shaped storage connecting rods as the bottom support folding connecting rod group, the volume can be enlarged. And by providing a V-shaped connecting rod, the bottom connection points between the two cross-shaped storage connecting rods can be connected and supported to prevent the middle parts of the two cross-shaped storage connecting rods from sagging and deforming due to stress. Moreover, when the folding frame is folded or unfolded, since the lower end of the V-shaped connecting rod is hinged and the upper end is hinged with the middle cross rod, it can rotate and fold together with the side folding connecting rod group. That is to say, it can ensure that the folding and unfolding of the folding frame are smooth without obstacles, improve the convenience of using the trailer, and enhance the user experience. Description of the Drawings

[0022] Figure 1 Is a perspective view of Embodiment 1 of the present utility model;

[0023] Figure 2 Is a top view of Embodiment 1 of the present utility model;

[0024] Figure 3 Is a right view of Embodiment 1 of the present utility model;

[0025] Figure 4 Is a schematic diagram of the folded state of Embodiment 1 of the present utility model;

[0026] Figure 5 Is a perspective view of Embodiment 2 of the present utility model;

[0027] Figure 6 Is a right view of Embodiment 2 of the present utility model;

[0028] Figure 7 Is a schematic diagram of the folded state of Embodiment 2 of the present utility model.

[0029] Reference Numerals: vertical rod 1, first hinge seat 11, first sliding seat 12, side folding connecting rod group 2, front side folding connecting rod group 21, rear side folding connecting rod group 22, left side folding connecting rod group 23, right side folding connecting rod group 24, cross-shaped cross rod 25, left cross sub-rod 251, right cross sub-rod 252, V-shaped connecting rod 26, front side sub-rod 261, rear side sub-rod 262, extension rod 263, lower hinge point 27, cross connecting rod 28, bottom support folding connecting rod group 3, cross-shaped storage connecting rod 31, middle hinge seat 311, bottom sub-rod 312, bottom connection point 32, connecting piece 33, walking wheel 4, front bottom rod 5, handle 6. Detailed Embodiments

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Example 1

[0032] like Figures 1 to 4 As shown, an improved structure of a folding trailer of this embodiment, the folding frame includes four uprights 1, four side folding link groups 2 and a bottom support folding link group 3, and the front and rear left and right ends of the bottom support folding link group 3 are respectively hinged to the lower part of the four uprights 1. The side folding link groups 2 and the bottom support folding link group 3 are arranged so that when the four uprights 1 of the folding frame are separated or approached from each other, each link group can be linked and cooperated to realize the expansion or folding of the folding frame, so as to carry goods or store the folding trailer.

[0033] In this embodiment, the four side folding link groups 2 are distributed between the four vertical poles 1 and form a frame shape. The lower end of each side folding link group 2 is hinged to the lower part of the adjacent vertical pole 1, and the upper end is slidably connected to the upper part of the vertical pole 1; when the four vertical poles 1 are close to each other, the upper end of each side folding link group 2 can slide on the vertical pole 1.

[0034] In this embodiment, the bottom support folding link group 3 includes two cross storage links 31 arranged in front and back, and the rear left and right ends of the front cross storage link 31 are respectively hingedly connected with the front left and right ends of the rear cross storage link 31 to form two bottom connection points 32 distributed on the left and right; setting two cross storage links 31 can effectively expand the volume of the folding trailer and increase the capacity of the load.

[0035] The four side folding link groups 2 are divided into a front folding link group 21, a rear folding link group 22, a left folding link group 23 and a right folding link group 24;

[0036] The left folding link group 23 and the right folding link group 24 have the same structure, and both include three groups of cross rods 25 that are hingedly connected in sequence at the front, middle and rear, and a V-shaped link 26 is provided at the lower part of the middle cross rod 25;

[0037] This embodiment is described by taking the right folding link group 24 as an example. The middle cross rod 25 of the right folding link group 24 includes a left cross sub-rod 251 and a right cross sub-rod 252, which are hingedly connected in the middle.

[0038] The upper ends of both sides of the V-shaped connecting rod 26 are respectively hinged to the front and rear sides of the lower part of the middle cross rod 25 on the same side, that is, respectively hinged to the lower part of the left cross sub-rod 251 and the lower part of the right cross sub-rod 252. And the lower hinge point 27 of the V-shaped connecting rod 26 is hinged and matched with the bottom connection point 32 on the same side.

[0039] Thus, in this embodiment, by providing two cross storage connecting rods 31, the volume can be enlarged. And by providing the V-shaped connecting rod 26, the bottom connection point 32 between the two cross storage connecting rods 31 can be connected and supported, preventing the middle parts of the two cross storage connecting rods 31 from sagging and deforming due to force. And when the folding frame is folded or unfolded, since the lower end of the V-shaped connecting rod 26 is hinged and matched, and the upper end is hinged and matched with the middle cross rod, it can rotate and fold together with the side folding connecting rod group 2. That is, it can ensure that the folding and unfolding of the folding frame are smooth and unobstructed, improving the convenience of using the trailer and enhancing the user experience.

[0040] Specifically, the V-shaped connecting rod 26 includes a front side sub-rod 261 and a rear side sub-rod 262, and the front side sub-rod 261 and the rear side sub-rod 262 are respectively distributed on the left and right sides of the middle cross rod 25 on the same side. For example, the front side sub-rod 261 of the V-shaped connecting rod 26 on the right side folding connecting rod group 24 is located on the right side of the middle cross rod 25, and the rear side sub-rod 262 is located on the left side of the middle cross rod 25, which is used to reduce the volume after the folding trailer is folded, and further reduce the overall storage volume of the trailer.

[0041] In this embodiment, walking wheels 4 are respectively provided at the bottoms of the vertical rods 1. To facilitate the trailer to move. At the same time, the lower parts of the front two vertical rods 1 can also be hinged with a front bottom rod 5, and a handle 6 is hinged in the middle of the front bottom rod 5. Since it is convenient to pull the trailer to walk through the handle 6.

[0042] A first hinge seat 11 may be provided at the lower part of the vertical rod 1, which is used to hinge the front end or the rear end of the bottom support folding connecting rod group 3, the lower end of the side folding connecting rod group 2 and the front bottom rod 5; a first sliding seat 12 is provided at the upper part of the vertical rod 1, and the first sliding seat 12 can be sleeved on the upper area of the vertical rod 1 and slide up and down, and the first sliding seat 12 is used to hinge the upper end of the side folding connecting rod group 2.

[0043] A connecting piece 33 may be provided at the bottom connection point 32, and the front and rear sides of the connecting piece 33 are for the ends on the same side of the front cross storage connecting rod 31 and the rear cross storage connecting rod 31 to be hinged; and the lower hinge point 27 of the V-shaped connecting rod 26 is hinged to the middle of the connecting piece 33.

[0044] In this embodiment, the cross storage connecting rod 31 includes an intermediate hinge seat 311 and four bottom sub-rods 312 that are radially hinged to the lower part of the intermediate hinge seat 311 in a cross shape.

[0045] In this embodiment, the front folding link group 21 and the rear folding link group 22 have the same structure, and both include two sets of cross links 28. The two sets of cross links 28 are connected to each other on the left and right and are symmetrically arranged.

[0046] Embodiment 2

[0047] As Figures 5 to 7 shown, the structure of this embodiment is basically the same as that of the above embodiment. The main difference is that the upper ends of both ends of the V-shaped link 26 in this embodiment are also upwardly extended to form extension rods 263 at the ends hinged to the lower part of the middle cross rod 25.

[0048] The upper end of the extension rod 263 on the front side of the V-shaped link 26 is hinged to the rear side of the upper part of the front cross rod 25, and the upper end of the extension rod 263 on the rear side of the V-shaped link 26 is hinged to the front side of the upper part of the rear cross rod 25. In this way, the supporting effect of the V-shaped link 26 on the bottom support folding link group 3 can be further improved.

[0049] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, equivalent changes and modifications made without departing from the principle of the present invention should still fall within the protection scope of the present invention.

[0050] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0051] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meanings of "a plurality" and "several" are two or more, unless otherwise specifically defined.

[0052] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly defined and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0054] The above disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0055] In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. An improved structure of a folding trailer, the folding frame of which includes four vertical rods, four side folding link groups and a bottom support folding link group. The front, rear, left and right ends of the bottom support folding link group are respectively hinged to the lower parts of the four vertical rods. It is characterized in that: The four side folding link groups are distributed between the four vertical rods and enclose a frame shape. The lower ends of each side folding link group are hinged to the lower parts of the adjacent vertical rods, and the upper ends are slidably connected to the upper parts of the vertical rods; The bottom support folding link group includes two cross storage links arranged front and rear. The left and right ends of the rear part of the front cross storage link are respectively hinged with the left and right ends of the front part of the rear cross storage link to form two bottom connection points distributed left and right; The four side folding link groups are divided into a front folding link group, a rear folding link group, a left folding link group and a right folding link group; The left folding link group and the right folding link group have the same structure, and both include three cross bars hinged in sequence from front to middle to rear. And a V-shaped link is provided at the lower part of the middle cross bar; The upper ends of both sides of the V-shaped link are respectively hinged to the front and rear sides of the lower part of the middle cross bar on the same side, and the lower hinge point of the V-shaped link is hinged with the bottom connection point on the same side.

2. The improved structure of a folding trailer according to claim 1, characterized in that: The upper ends of both sides of the V-shaped link hinged to the lower part of the middle cross bar also extend upward to form extension rods. The upper end of the extension rod on the front side of the V-shaped link is hinged to the rear side of the upper part of the front cross bar, and the upper end of the extension rod on the rear side of the V-shaped link is hinged to the front side of the upper part of the rear cross bar.

3. An improved structure of a folding trailer according to claim 1 or 2, characterized in that: The V-shaped link includes a front sub-link and a rear sub-link, and the front sub-link and the rear sub-link are respectively distributed on the left and right sides of the middle cross bar on the same side.

4. The improved structure of a folding trailer according to claim 1, characterized in that: The front folding link group and the rear folding link group have the same structure, and both include two cross links. The two cross links are connected left and right and symmetrically arranged.

5. An improved structure of a folding trailer according to claim 1, characterized in that: Walking wheels are respectively provided at the bottoms of the vertical rods.

6. The improved structure of a folding trailer according to claim 1, characterized in that: The lower parts of the front two vertical rods are also hinged with a front bottom rod, and a handle is hinged in the middle of the front bottom rod.

7. An improved structure of a folding trailer according to claim 6, characterized in that: A first hinge seat is provided at the lower part of the vertical rod for hinging the front end or the rear end of the bottom support folding link group, the lower end of the side folding link group and the front bottom rod.

8. An improved structure of a folding trailer according to claim 1 or 2, characterized in that: A first sliding seat is provided at the upper part of the vertical rod. The first sliding seat is sleeved on the upper area of the vertical rod and can slide up and down. The first sliding seat is used for hinging the upper ends of each side folding link group.

9. An improved structure of a folding trailer according to claim 1 or 2, characterized in that: The cross storage link includes an intermediate hinge seat and four bottom sub-links radially hinged to the lower part of the intermediate hinge seat in a cross shape.

10. An improved structure of a folding trailer according to claim 1 or 2, characterized in that: A connecting piece is provided at the bottom connection point. The front and rear sides of the connecting piece are for the ends on the same side of the front cross storage link and the rear cross storage link to be hinged; and the lower hinge point of the V-shaped link is hinged to the middle part of the connecting piece.

Images