CN220220800U - Side frame structure of folding trailer - Google Patents

Abstract

The utility model relates to a side frame structure of a folding trailer, which comprises a first telescopic vertical rod, a second telescopic vertical rod and a folding mechanism, wherein the folding mechanism comprises a first scissor fork rod assembly, a second scissor fork rod assembly and a third scissor fork rod assembly, a first end of the first scissor fork rod assembly is rotatably connected with the first telescopic vertical rod, and a first end of the second scissor fork rod assembly is rotatably connected with the second telescopic vertical rod. One fork rod of the first scissor fork rod assembly is rotationally connected with one fork rod of the second scissor fork rod assembly, and the other fork rod of the first scissor fork rod assembly is rotationally connected with the other fork rod of the second scissor fork rod assembly through the third scissor fork rod assembly. The whole height of trailer risees after the extension of first flexible pole setting and the flexible pole setting of second, and the folding process of supplementary side frame structure is carried out in the extension through first flexible pole setting and the flexible pole setting of second, and folding and the expansion process of side frame structure are more smooth and easy, and the third scissors fork arm subassembly has improved the bulk strength of side frame structure.

Description

Side frame structure of folding trailer

Technical Field

The utility model relates to the technical field of folding trailers, in particular to a side frame structure of a folding trailer.

Background

In daily life and production, luggage, articles and the like often need to be carried, and a trailer tool is often used in the carrying process. The trailer tool is widely applied when carrying things because of the characteristics of convenient pushing, time saving and labor saving. In order to facilitate the storage of the trailer tool, the trailer tool is designed into a foldable structure, so that the trailer tool is very light and convenient to carry, and can be placed on a vehicle or in a knapsack after being folded, and the trailer tool occupies small space. However, the side frame structure of the existing folding trailer is short in length after being unfolded, so that the whole trailer is short in length and insufficient in volume, and in the folding and unfolding processes of the folding trailer, the folding and unfolding of the side frame structure are not smooth, and the use of a user is affected. In addition, the side frame structure of the existing folding trailer is simple in structure, larger in pore and insufficient in overall strength, so that the support strength of the side frame structure is low, and articles with larger weight are inconvenient to carry.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned drawbacks and shortcomings of the prior art, the present utility model provides a side frame structure of a folding trailer, which solves the technical problems of smaller length, low supporting strength and unsmooth folding and unfolding process of the side frame structure of the folding trailer after being unfolded.

(II) technical scheme

In order to achieve the above purpose, the side frame structure of the folding trailer of the utility model comprises a first telescopic upright rod, a second telescopic upright rod and a folding mechanism;

the folding mechanism comprises a first scissor fork rod assembly, a second scissor fork rod assembly and a third scissor fork rod assembly, wherein the first end of the first scissor fork rod assembly is rotationally connected with the first telescopic vertical rod, and the first end of the second scissor fork rod assembly is rotationally connected with the second telescopic vertical rod;

one fork rod of the first scissor fork rod assembly is rotationally connected with one fork rod of the second scissor fork rod assembly, and the other fork rod of the first scissor fork rod assembly is rotationally connected with the other fork rod of the second scissor fork rod assembly through the third scissor fork rod assembly.

Optionally, the first telescopic pole setting with the flexible pole setting of second all includes fixed pipe and flexible pipe, fixed pipe is vertical to be set up, flexible pipe slip cap is located the upper end of fixed pipe.

Optionally, the first scissor fork assembly comprises a first cross pipe and a third cross pipe which are connected in a rotating way, and the second scissor fork assembly comprises a second cross pipe and a fourth cross pipe which are connected in a rotating way;

the second ends of the first cross pipe and the second cross pipe are rotationally connected, the pipe bodies of the first cross pipe and the second cross pipe are rotationally connected with the third scissor fork assembly, and the second ends of the third cross pipe and the fourth cross pipe are rotationally connected with the third scissor fork assembly;

the first end of the first cross pipe is rotationally connected with the lower end of the fixed pipe of the first telescopic vertical rod, and the first end of the second cross pipe is rotationally connected with the lower end of the fixed pipe of the second telescopic vertical rod;

the first end of the third cross pipe is rotationally connected with the upper end of the telescopic pipe of the first telescopic vertical rod, and the first end of the fourth cross pipe is rotationally connected with the upper end of the telescopic pipe of the second telescopic vertical rod.

Optionally, the third scissor fork assembly includes a first cross pipe and a second cross pipe rotatably connected;

the first end of the first cross middle pipe is rotationally connected with the pipe body of the first cross pipe, and a rotational connection point is positioned between the second end of the first cross pipe and the rotational connection point of the third cross pipe on the first cross pipe;

the second end of the first cross middle pipe is rotationally connected with the second end of the fourth cross pipe;

the first end of the second cross middle pipe is rotationally connected with the pipe body of the second cross pipe, and a rotational connection point is positioned between the second end of the second cross pipe and the rotational connection point of the fourth cross pipe on the second cross pipe;

the second end of the second cross middle pipe is rotatably connected with the second end of the third cross middle pipe.

Optionally, the second ends of the first cross pipe and the third cross pipe are bent pipes.

Optionally, a bottom corner fixing piece is arranged at the lower end of the fixing tube;

the first end of the first cross pipe is rotationally connected with the bottom corner fixing piece at the lower end of the fixing pipe of the first telescopic vertical rod;

the first end of the second cross pipe is rotatably connected with the bottom corner fixing piece at the lower end of the fixing pipe of the second telescopic vertical rod.

Optionally, a vertex angle fixing piece is arranged at the upper end of the telescopic pipe;

the first end of the third cross pipe is rotationally connected with the vertex angle fixing piece at the upper end of the telescopic pipe of the first telescopic vertical rod;

the first end of the fourth cross pipe is rotationally connected with the vertex angle fixing piece at the upper end of the telescopic pipe of the second telescopic vertical rod.

(III) beneficial effects

The whole height of trailer risees after first flexible pole setting and the extension of the flexible pole setting of second, and the folding process of side frame structure is assisted in the extension of the flexible pole setting of first flexible pole setting and second, has improved the smoothness of side frame structure at folding and expansion process effectively. And, because the side frame structure height after folding increases, can set up the side frame structure that the volume is bigger, after the side frame structure expands, the great side frame structure of volume has bigger length to increase the volume of folding trailer effectively. In addition, the third scissors fork rod assembly is arranged between the first scissors fork rod assembly and the second scissors fork rod assembly, so that a blank area between the first scissors fork rod assembly and the second scissors fork rod assembly is effectively supplemented, the overall strength of the side frame structure is improved, the supporting effect is improved, articles with large weight are placed in the folding trailer conveniently, and the practicability of the folding trailer is improved.

Drawings

FIG. 1 is a perspective view of a side frame structure of a folding trailer of the present utility model in an unfolded state;

FIG. 2 is a front view of the folded trailer of the present utility model in an unfolded state of the side frame structure;

FIG. 3 is a schematic view of a side frame structure of a folding trailer of the present utility model in a semi-folded condition;

fig. 4 is a schematic structural view showing a folded state of a side frame structure of the folding trailer of the present utility model.

[ reference numerals description ]

1: a first telescopic upright; 11: a fixed tube; 12: a telescopic tube;

2: the second telescopic upright rod;

3: a folding mechanism; 31: a first scissor fork assembly; 311: a first cross tube; 313: a third cross tube; 32: a second scissor fork assembly; 322: a second cross tube; 324: a fourth cross tube; 33: a third scissor fork assembly; 331: a first cross middle tube; 332: a second cross middle tube;

4: a bottom corner fixing member;

5: and a vertex angle fixing piece.

Detailed Description

The utility model will be better explained for understanding by referring to the following detailed description of the embodiments in conjunction with the accompanying drawings. Wherein references herein to "upper", "lower", "etc. are made with reference to the orientation of fig. 2.

While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

As shown in fig. 1-4, the utility model provides a side frame structure of a folding trailer, fig. 1-4 shows the installation mode of the side frame structure in the folding trailer, the side frame structure is shown by adopting a solid line and is combined with a dotted line part to form an integral structure of the folding trailer, the side frame structure of the folding trailer is a group of side frame structures which are oppositely arranged and have the same structure and are used for surrounding a containing space of the folding trailer with frame structures at two ends of the folding trailer, and the utility model is described by adopting one side frame structure. The side frame structure comprises a first telescopic vertical rod 1, a second telescopic vertical rod 2 and a folding mechanism 3, wherein the folding mechanism 3 comprises a first scissor type fork rod assembly 31, a second scissor type fork rod assembly 32 and a third scissor type fork rod assembly 33, the first scissor type fork rod assembly 31, the second scissor type fork rod assembly 32 and the third scissor type fork rod assembly 33 are composed of two cross-connected fork rods, and two fork rods are overlapped by rotating the two fork rods during folding. The first ends of the two fork bars of the first scissor fork assembly 31 are respectively connected with the upper end and the lower end of the first telescopic vertical rod 1 in a rotating way, and the first ends of the two fork bars of the second scissor fork assembly 32 are respectively connected with the upper end and the lower end of the second telescopic vertical rod 2 in a rotating way. One of the fork bars of the first scissor fork assembly 31 is rotatably coupled to one of the fork bars of the second scissor fork assembly 32, and the other fork bar of the first scissor fork assembly 31 is rotatably coupled to the other fork bar of the second scissor fork assembly 32 via a third scissor fork assembly 33. When folding, the first telescopic vertical rod 1 and the second telescopic vertical rod 2 are close to each other, the first telescopic vertical rod 1 and the second telescopic vertical rod 2 are extended, so that the two fork rods of the first scissor fork rod assembly 31, the second scissor fork rod assembly 32 and the third scissor fork rod assembly 33 can rotate to be almost overlapped, and the first scissor fork rod assembly 31, the second scissor fork rod assembly 32 and the third scissor fork rod assembly 33 are folded and compressed between the first telescopic vertical rod 1 and the second telescopic vertical rod 2. The whole height of trailer risees after the extension of first flexible pole setting 1 and the flexible pole setting 2 of second, and the folding process of side frame structure is assisted in the extension of through first flexible pole setting 1 and the flexible pole setting 2 of second, has improved the smoothness of side frame structure at folding and expansion process effectively. And, because the side frame structure height after folding increases, can set up the side frame structure that the volume is bigger, after the side frame structure expands, the great side frame structure of volume has bigger length to increase the volume of folding trailer effectively. In addition, the third scissor fork assembly 33 is arranged between the first scissor fork assembly 31 and the second scissor fork assembly 32, so that a blank area between the first scissor fork assembly 31 and the second scissor fork assembly 32 is effectively supplemented, the overall strength of the side frame structure is improved, the supporting effect is improved, articles with larger weight are conveniently placed in the folding trailer, and the practicability of the folding trailer is improved.

As shown in fig. 1-4, the first telescopic upright 1 and the second telescopic upright 2 comprise a fixed pipe 11 and a telescopic pipe 12, wherein the fixed pipe 11 is vertically arranged when the folding trailer is in an unfolding state, the telescopic pipe 12 is slidably sleeved at the upper end of the fixed pipe 11, and the telescopic pipe 12 is slidably telescopic from the upper end of the fixed pipe 11.

As shown in fig. 2, the first scissor fork assembly 31 includes a first cross tube 311 and a third cross tube 313 rotatably coupled, and the second scissor fork assembly 32 includes a second cross tube 322 and a fourth cross tube 324 rotatably coupled. The second ends of the first cross pipe 311 and the second cross pipe 322 are rotationally connected through a rotating shaft, the pipe bodies of the first cross pipe 311 and the second cross pipe 322 are rotationally connected with the third scissor fork rod assembly 33 through the rotating shaft, the second ends of the third cross pipe 313 and the fourth cross pipe 324 are rotationally connected with the third scissor fork rod assembly 33, the second ends of the third scissor fork rod assembly 33 and the fourth cross pipe 313 are connected to the pipe bodies of the first cross pipe 311 and the second cross pipe 322, the blank areas of the middle positions of the four cross pipes are filled in sequence, the stability of the folding mechanism 3 is improved, the integral strength of the folding mechanism 3 is effectively improved, and the supporting force of a side frame structure is improved. The first end of the first cross pipe 311 is rotatably connected with the lower end of the fixed pipe 11 of the first telescopic vertical rod 1 through a rotating shaft, and the first end of the second cross pipe 322 is rotatably connected with the lower end of the fixed pipe 11 of the second telescopic vertical rod 2 through a rotating shaft. The first end of the third cross pipe 313 is rotatably connected with the upper end of the telescopic pipe 12 of the first telescopic vertical rod 1 through a rotating shaft, and the first end of the fourth cross pipe 324 is rotatably connected with the upper end of the telescopic pipe 12 of the second telescopic vertical rod 2 through a rotating shaft. When folding mechanism 3 folding shrink, assist the folding of first scissors fork arm subassembly 31 and second scissors fork arm subassembly 32 through flexible pipe 12, avoid adopting the clamping stagnation phenomenon that appears when sliding sleeve sliding connection, make side frame mechanism more smooth and easy when folding, improved user's use experience.

As shown in fig. 2, the third scissor fork assembly 33 includes a first cross tube 331 and a second cross tube 332 that are rotatably coupled. The first end of the first cross middle tube 331 is rotatably connected to the tube body of the first cross tube 311 through a rotation shaft, and the rotation connection point is located on the tube body between the second end of the first cross tube 311 and the rotation connection point of the third cross tube 313 on the first cross tube 311, preferably in a central position. A second end of the first cross-over tube 331 is rotatably coupled to a second end of the fourth cross-over tube 324. The first end of the second cross center tube 332 is rotatably connected to the body of the second cross tube 322 with the rotational connection point being located on the body, preferably centrally, between the second end of the second cross tube 322 and the rotational connection point of the fourth cross tube 324 on the second cross tube 322. A second end of the second cross over tube 332 is rotatably coupled to a second end of the third cross over tube 313.

As shown in fig. 1 and 3, the second ends of the first cross pipe 311 and the third cross pipe 313 are bent pipes, the bent pipe part comprises a first connecting pipe, a bent pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe are staggered, namely, the first connecting pipe and the second connecting pipe are parallel to each other but are not overlapped, and the first connecting pipe and the second connecting pipe are connected through the bent pipe.

As shown in fig. 1 to 4, the bottom corner fixing member 4 is sleeved at the lower end of the fixing tube 11, the first end of the first cross tube 311 is rotatably connected with the mounting groove formed in the bottom corner fixing member 4 at the lower end of the fixing tube 11 of the first telescopic vertical rod 1 through a rotating shaft, the first end of the second cross tube 322 is rotatably connected with the mounting groove formed in the bottom corner fixing member 4 at the lower end of the fixing tube 11 of the second telescopic vertical rod 2 through a rotating shaft, and the first cross tube 311 and the second cross tube 322 are limited to rotate in a vertical plane only through the mounting groove. And, the upper end of flexible pipe 12 is provided with apex angle mounting 5, and the first end of third crossing pipe 313 is connected through the pivot rotation with the mounting groove of seting up on the apex angle mounting 5 of flexible pipe 12 upper end of first flexible pole setting 1, and the first end of fourth crossing pipe 324 is connected through the pivot rotation with the mounting groove of seting up on the apex angle mounting 5 of flexible pipe 12 upper end of second flexible pole setting 2, restricts through the mounting groove that third crossing pipe 313 and fourth crossing pipe 324 also can only rotate in vertical plane.

According to the utility model, the whole height of the trailer is increased after the first telescopic vertical rod 1 and the second telescopic vertical rod 2 are extended, and the folding process of the side frame structure is assisted by the extension of the first telescopic vertical rod 1 and the second telescopic vertical rod 2, so that the smoothness of the side frame structure in the folding and unfolding processes is effectively improved. And, because the side frame structure height after folding increases, can set up the side frame structure that the volume is bigger, after the side frame structure expands, the great side frame structure of volume has bigger length to increase the volume of folding trailer effectively. In addition, the third scissor fork assembly 33 is arranged between the first scissor fork assembly 31 and the second scissor fork assembly 32, so that a blank area between the first scissor fork assembly 31 and the second scissor fork assembly 32 is effectively supplemented, the overall strength of the side frame structure is improved, the supporting effect is improved, articles with larger weight are conveniently placed in the folding trailer, and the practicability of the folding trailer is improved.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (7)

1. The side frame structure of the folding trailer is characterized by comprising a first telescopic upright (1), a second telescopic upright (2) and a folding mechanism (3);

the folding mechanism (3) comprises a first scissor fork assembly (31), a second scissor fork assembly (32) and a third scissor fork assembly (33), wherein the first end of the first scissor fork assembly (31) is rotationally connected with the first telescopic vertical rod (1), and the first end of the second scissor fork assembly (32) is rotationally connected with the second telescopic vertical rod (2);

one fork rod of the first scissor fork rod assembly (31) is rotationally connected with one fork rod of the second scissor fork rod assembly (32), and the other fork rod of the first scissor fork rod assembly (31) is rotationally connected with the other fork rod of the second scissor fork rod assembly (32) through the third scissor fork rod assembly (33).

2. The side frame structure of the folding trailer according to claim 1, wherein the first telescopic upright (1) and the second telescopic upright (2) comprise a fixed pipe (11) and a telescopic pipe (12), the fixed pipe (11) is vertically arranged, and the telescopic pipe (12) is slidably sleeved at the upper end of the fixed pipe (11).

3. The side frame structure of a folding trailer according to claim 2, wherein the first scissor fork assembly (31) comprises a first cross pipe (311) and a third cross pipe (313) rotatably connected, and the second scissor fork assembly (32) comprises a second cross pipe (322) and a fourth cross pipe (324) rotatably connected;

the second ends of the first cross pipe (311) and the second cross pipe (322) are rotationally connected, the pipe bodies of the first cross pipe (311) and the second cross pipe (322) are rotationally connected with the third scissor fork assembly (33), and the second ends of the third cross pipe (313) and the fourth cross pipe (324) are rotationally connected with the third scissor fork assembly (33);

the first end of the first cross pipe (311) is rotationally connected with the lower end of the fixed pipe (11) of the first telescopic vertical rod (1), and the first end of the second cross pipe (322) is rotationally connected with the lower end of the fixed pipe (11) of the second telescopic vertical rod (2);

the first end of the third cross pipe (313) is rotatably connected with the upper end of the telescopic pipe (12) of the first telescopic vertical rod (1), and the first end of the fourth cross pipe (324) is rotatably connected with the upper end of the telescopic pipe (12) of the second telescopic vertical rod (2).

4. A side frame structure of a folding trailer according to claim 3, characterized in that the third scissor fork assembly (33) comprises a first cross pipe (331) and a second cross pipe (332) rotatably connected;

the first end of the first cross middle pipe (331) is rotationally connected with the pipe body of the first cross pipe (311), and a rotational connection point is positioned between the second end of the first cross pipe (311) and the rotational connection point of the third cross pipe (313) on the first cross pipe (311);

the second end of the first cross middle pipe (331) is rotatably connected with the second end of the fourth cross pipe (324);

the first end of the second cross middle tube (332) is rotationally connected with the tube body of the second cross tube (322), and a rotational connection point is positioned between the second end of the second cross tube (322) and the rotational connection point of the fourth cross tube (324) on the second cross tube (322);

a second end of the second cross center tube (332) is rotatably coupled to a second end of the third cross tube (313).

5. A side frame structure of a folding trailer according to claim 3, characterized in that the second ends of the first cross pipe (311) and the third cross pipe (313) are both bent pipes.

6. A side frame structure of a folding trailer according to claim 3, characterized in that the lower end of the fixing tube (11) is provided with a bottom corner fixing member (4);

the first end of the first cross pipe (311) is rotationally connected with the bottom corner fixing piece (4) at the lower end of the fixing pipe (11) of the first telescopic vertical rod (1);

the first end of the second cross pipe (322) is rotatably connected with the bottom corner fixing piece (4) at the lower end of the fixing pipe (11) of the second telescopic vertical rod (2).

7. A side frame structure of a folding trailer according to claim 3, characterized in that the upper end of the telescopic tube (12) is provided with a top angle fixing member (5);

a first end of the third cross pipe (313) is rotatably connected with the vertex angle fixing piece (5) at the upper end of the telescopic pipe (12) of the first telescopic vertical rod (1);

the first end of the fourth cross pipe (324) is rotatably connected with the vertex angle fixing piece (5) at the upper end of the telescopic pipe (12) of the second telescopic vertical rod (2).