CN220220799U - Folding trailer frame and trailer - Google Patents

Abstract

The utility model relates to a folding trailer frame and a trailer, wherein the folding trailer frame comprises four telescopic vertical rods which are arranged at intervals in a rectangular shape and a bottom support mechanism arranged among the four telescopic vertical rods, folding mechanisms are arranged between any two adjacent telescopic vertical rods, the folding mechanisms can be folded and contracted, and the folded and contracted height of the folding mechanisms is higher than that of a fixed pipe. The telescopic vertical rod comprises a fixed pipe and a telescopic pipe, the fixed pipe is vertically arranged, the bottom support mechanism is rotationally connected with the lower end of the fixed pipe, the telescopic pipe is slidably sleeved at the upper end of the fixed pipe, the upper end of the folding mechanism is rotationally connected with the upper end of the telescopic pipe, and the lower end of the folding mechanism is rotationally connected with the lower end of the fixed pipe. The telescopic pipe is driven to extend and slide along the length direction of the fixed pipe when the folding mechanism is folded, the whole height of the trailer is increased after the telescopic vertical rod is extended, and the smoothness of folding and unfolding of the folding trailer and the volume of the trailer are effectively improved through the folding process of the sliding auxiliary folding mechanism of the telescopic pipe.

Description

Folding trailer frame and trailer

Technical Field

The utility model relates to the technical field of folding trailers, in particular to a folding trailer frame and a 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 existing folding trailer has a small volume after being unfolded, and is not smooth in the folding and unfolding processes of the folding trailer, so that the use of users is affected. In addition, because the whole intensity of current folding trailer is not enough, the supporting effect is relatively poor, is inconvenient for carrying the great article of weight.

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 folding trailer frame and a trailer, which solve the technical problems of small volume, low strength and unsmooth folding and unfolding process of the folding trailer after being unfolded.

(II) technical scheme

In order to achieve the purpose, the folding trailer frame comprises four telescopic vertical rods which are arranged at intervals in a rectangular shape and a bottom support mechanism arranged among the four telescopic vertical rods, wherein a folding mechanism is arranged between any two adjacent telescopic vertical rods, and the folding mechanism can be folded and contracted;

the telescopic vertical rod comprises a fixed pipe and a telescopic pipe, the fixed pipe is vertically arranged, the bottom bracing mechanism is rotationally connected with the lower end of the fixed pipe, the telescopic pipe is slidably sleeved at the upper end of the fixed pipe, the upper end of the folding mechanism is rotationally connected with the upper end of the telescopic pipe, and the lower end of the folding mechanism is rotationally connected with the lower end of the fixed pipe;

the folded and contracted height of the folding mechanism is higher than that of the fixed tube.

Optionally, the four folding mechanisms include a first side folding mechanism, a second side folding mechanism, a front side folding mechanism, and a rear side folding mechanism; the four telescopic vertical rods comprise a first telescopic vertical rod, a second telescopic vertical rod, a third telescopic vertical rod and a fourth telescopic vertical rod;

the first side folding mechanism is connected between the first telescopic vertical rod and the second telescopic vertical rod, the second side folding mechanism is connected between the third telescopic vertical rod and the fourth telescopic vertical rod, the front side folding mechanism is arranged between the first telescopic vertical rod and the fourth telescopic vertical rod, and the rear side folding mechanism is arranged between the second telescopic vertical rod and the third telescopic vertical rod.

Optionally, the first side folding mechanism and the second side folding mechanism each comprise a first side cross tube, a second side cross tube, a third side cross tube, a fourth side cross tube, and an x-shaped cross tube assembly;

the first ends of the first side cross pipes and the second side cross pipes are rotationally connected, the pipe body of the third side cross pipe is rotationally connected with the pipe body of the first side cross pipe, and the pipe body of the fourth side cross pipe is rotationally connected with the pipe body of the second side cross pipe; the tube bodies of the first side cross tube and the second side cross tube are rotationally connected with the x-shaped cross tube assembly, and the first ends of the third side cross tube and the fourth side cross tube are rotationally connected with the x-shaped cross tube assembly;

the second end of the first side cross pipe of the first side folding mechanism is rotationally connected with the lower end of the fixed pipe of the first telescopic vertical rod; the second end of the second side cross pipe of the first side folding mechanism is rotationally connected with the lower end of the fixed pipe of the second telescopic vertical rod; the second end of the third side cross tube of the first side folding mechanism is rotationally connected with the upper end of the telescopic tube of the first telescopic vertical rod; the second end of the fourth side cross tube of the first side folding mechanism is rotationally connected with the upper end of the telescopic tube of the second telescopic vertical rod;

the second end of the first side cross pipe of the second side folding mechanism is rotationally connected with the lower end of the fixed pipe of the fourth telescopic vertical rod; the second end of the second side cross pipe of the second side folding mechanism is rotationally connected with the lower end of the fixed pipe of the third telescopic vertical rod; the second end of the third side cross pipe of the second side folding mechanism is rotationally connected with the upper end of the telescopic pipe of the fourth telescopic vertical rod; the second end of the fourth side cross pipe of the second side folding mechanism is rotatably connected with the upper end of the telescopic pipe of the third telescopic vertical rod.

Optionally, the x-shaped cross tube assembly comprises a first cross tube and a second cross tube rotatably connected;

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

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

Optionally, the front folding mechanism and the rear folding mechanism each comprise a crossed bent pipe and a crossed straight pipe which are rotationally connected;

the first end of the crossed straight pipe of the front folding mechanism is rotationally connected with the upper end of the telescopic pipe of the first telescopic vertical rod, the second end of the crossed straight pipe of the front folding mechanism is rotationally connected with the lower end of the fixed pipe of the fourth telescopic vertical rod, the first end of the crossed straight pipe of the front folding mechanism is rotationally connected with the upper end of the telescopic pipe of the fourth telescopic vertical rod, and the second end of the crossed straight pipe of the front folding mechanism is rotationally connected with the lower end of the fixed pipe of the first telescopic vertical rod;

the first end of the crossed bent pipe of the rear folding mechanism is rotationally connected with the upper end of the telescopic pipe of the second telescopic vertical rod, the second end of the crossed bent pipe of the rear folding mechanism is rotationally connected with the lower end of the fixed pipe of the third telescopic vertical rod, the first end of the crossed straight pipe of the rear folding mechanism is rotationally connected with the upper end of the telescopic pipe of the third telescopic vertical rod, and the second end of the crossed straight pipe of the rear folding mechanism is rotationally connected with the lower end of the fixed pipe of the second telescopic vertical rod.

Optionally, the lower extreme of fixed pipe is provided with the footing mounting, the upper end of flexible pipe is provided with the top foot mounting, folding mechanism's upper end with the top foot mounting rotates to be connected, folding mechanism's lower extreme with the footing mounting rotates to be connected.

Optionally, the bottom support mechanism comprises a bottom connecting piece and a bottom connecting pipe, wherein the first end of the bottom connecting pipe is rotatably connected with the bottom connecting piece at a limited angle, and the second end of the bottom connecting pipe is rotatably connected with the lower end of the fixed pipe at a limited angle.

Optionally, the folding trailer frame further comprises a handle mechanism;

the handle mechanism comprises a telescopic rod, a first connecting pipe and a second connecting pipe, wherein the first ends of the first connecting pipe and the second connecting pipe are rotationally connected with the telescopic rod, and the second ends of the first connecting pipe and the second connecting pipe are respectively rotationally connected with the lower ends of two adjacent fixed pipes in a one-to-one correspondence manner.

Optionally, rollers are arranged at the lower end of any one of the fixed pipes.

Further, the present utility model also provides a trailer comprising a cloth bag and a folding trailer frame as described above;

the cloth bag is located four between the flexible pole setting, four angles of cloth bag with four flexible pole setting the upper end one-to-one of flexible pipe is connected, the bottom of cloth bag set up in on the bottom stay mechanism.

(III) beneficial effects

When folding mechanism folds, namely folding trailer folds, folding mechanism drive flexible pipe is along the length direction extension slip of fixed pipe to folding mechanism is folding shrink fast, and flexible pole setting extension back trailer overall height risees, and the folding process of folding mechanism is assisted through the slip of flexible pipe, has improved folding trailer in folding and the smoothness of expansion process effectively. And, because the trailer height after folding increases, can set up the folding mechanism of volume bigger, when folding mechanism expands the back, the folding mechanism of volume bigger has bigger length to effectively increase the volume of folding trailer.

The middle blank area where the first side cross pipe, the second side cross pipe, the third side cross pipe and the fourth side cross pipe meet is provided with an x-shaped cross pipe assembly, gaps among the four side cross pipes are effectively supplemented, the overall strength of the side folding mechanism is improved, the supporting effect of the side folding mechanism 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 schematic view of the structure of a folding trailer frame of the present utility model;

FIG. 2 is an expanded perspective view of the folding trailer frame of the present utility model;

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

FIG. 4 is an expanded front view of the folding trailer frame of the present utility model;

FIG. 5 is a left side view of the unfolded state of the folding trailer frame of the present utility model;

FIG. 6 is a top view of the folded trailer frame of the present utility model in an unfolded state;

FIG. 7 is a front elevational view of the folded trailer frame of the present utility model;

fig. 8 is a left side view of the folded trailer frame of the present utility model in a folded condition.

[ reference numerals description ]

1: a telescopic upright rod; 11: a first telescopic upright; 12: the second telescopic upright rod; 13: a third telescopic upright rod; 14: a fourth telescopic upright;

2: a bottom support mechanism; 21: a bottom connecting piece; 22: a bottom connecting pipe;

3: a folding mechanism; 31: a first side folding mechanism; 311: a first side cross tube; 312: a second side cross tube; 313: a third side cross tube; 314: a fourth side cross tube; 315: a first cross middle tube; 316: a second cross middle tube; 32: a second side folding mechanism; 33: a front folding mechanism; 331: a cross elbow; 332: crossing straight pipes; 34: a rear folding mechanism;

4: a fixed tube; 41: a foot fixing member;

5: a telescopic tube; 51: a top foot fixing piece;

6: a handle mechanism; 60: a telescopic rod; 61: a first connecting pipe; 62: a second connecting pipe;

7: and a roller.

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. 4.

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 to 8, the present utility model provides a folding trailer frame, which comprises four telescopic uprights 1 and a bottom bracing mechanism 2, wherein the four telescopic uprights 1 are arranged at intervals in a rectangular shape, and the bottom bracing mechanism 2 is located in an area surrounded by the four telescopic uprights 1. The folding mechanism 3 is arranged between any two adjacent telescopic upright rods 1 to serve as a frame of a folding trailer, the folding mechanism 3 can be folded and contracted, the folded and contracted folding mechanism 3 is higher than the fixed pipe 4 in height, and the four telescopic upright rods 1 are gathered to the central position through the folding and contracted folding mechanism 3, so that the volume of the folding trailer is reduced, and the folding trailer is convenient to carry and store. The telescopic vertical rod 1 comprises a fixed pipe 4 and a telescopic pipe 5, the fixed pipe 4 is vertically arranged, the bottom support mechanism 2 is rotationally connected with the lower end of the fixed pipe 4, and when the bottom support mechanism 2 is in an unfolding state, the four fixed pipes 4 are supported through the bottom support mechanism 2, so that the basic form of the folding trailer in the unfolding state is maintained, the folding trailer has a larger accommodating space, and the practicability of the folding trailer is effectively improved. The upper end of fixed pipe 4 is located to flexible pipe 5 slip cap, and the upper end of folding mechanism 3 is connected with the upper end rotation of flexible pipe 5, and the lower extreme of folding mechanism 3 is connected with the lower extreme rotation of fixed pipe 4. When the folding trailer frame is in an unfolding state, the telescopic pipe 5 is completely contracted inside the fixed pipe 4, so that the strength of the telescopic stand column in the state is increased, the supporting strength of the folding mechanism 3 is increased, and the folding trailer is convenient to carry articles with large weight. When folding mechanism 3 is folding, namely folding trailer folding, folding mechanism 3 drive flexible pipe 5 extends along the length direction of fixed pipe 4 and slides to folding mechanism 3 is folding shrink fast, and flexible pole setting 1 stretches back trailer whole height risees, and the folding process of folding mechanism 3 is assisted through the slip of flexible pipe 5, has improved folding trailer in folding and the smoothness of expansion process effectively. And, because the height of the folded trailer increases, a larger folding mechanism 3 can be provided, and when the folding mechanism 3 is unfolded, the larger folding mechanism 3 has a larger length, thereby effectively increasing the volume of the folded trailer.

As shown in fig. 1 and 2, the four folding mechanisms 3 are a first side folding mechanism 31, a second side folding mechanism 32, a front side folding mechanism 33, and a rear side folding mechanism 34, respectively, and the four telescopic uprights 1 are a first telescopic upright 11, a second telescopic upright 12, a third telescopic upright 13, and a fourth telescopic upright 14, respectively. Wherein, the first side folding mechanism 31 is connected between the first telescopic vertical rod 11 and the second telescopic vertical rod 12, the second side folding mechanism 32 is connected between the third telescopic vertical rod 13 and the fourth telescopic vertical rod 14, the front side folding mechanism 33 is arranged between the first telescopic vertical rod 11 and the fourth telescopic vertical rod 14, and the rear side folding mechanism 34 is arranged between the second telescopic vertical rod 12 and the third telescopic vertical rod 13.

As shown in fig. 1 to 5, the lower end of the fixed tube 4 is provided with a foot fixing member 41, and the upper end of the telescopic tube 5 is provided with a foot fixing member 51. The first side folding mechanism 31 and the second side folding mechanism 32 are symmetrically installed and have identical structures, and each of the first side folding mechanism 31 and the second side folding mechanism 32 comprises a first side cross tube 311, a second side cross tube 312, a third side cross tube 313, a fourth side cross tube 314 and an x-shaped cross tube assembly. The first ends of the first side cross pipe 311 and the second side cross pipe 312 are rotationally connected, the body of the third side cross pipe 313 is rotationally connected with the body of the first side cross pipe 311, and the body of the fourth side cross pipe 314 is rotationally connected with the body of the second side cross pipe 312; the bodies of the first side cross tube 311 and the second side cross tube 312 are both rotatably connected to the x-type cross tube assembly, and the first ends of the third side cross tube 313 and the fourth side cross tube 314 are both rotatably connected to the x-type cross tube assembly. In the manner of mounting the first side folding mechanism 31 and the second side folding mechanism 32, the first side folding mechanism 31 is illustrated in detail, wherein the second end of the first side cross pipe 311 of the first side folding mechanism 31 is rotatably connected to the foot fixing member 41 at the lower end of the fixing pipe 4 of the first telescopic vertical rod 11, the second end of the second side cross pipe 312 of the first side folding mechanism 31 is rotatably connected to the foot fixing member 41 at the lower end of the fixing pipe 4 of the second telescopic vertical rod 12, the second end of the third side cross pipe 313 of the first side folding mechanism 31 is rotatably connected to the foot fixing member 51 at the upper end of the telescopic pipe 5 of the first telescopic vertical rod 11, and the second end of the fourth side cross pipe 314 of the first side folding mechanism 31 is rotatably connected to the foot fixing member 51 at the upper end of the telescopic pipe 5 of the second telescopic vertical rod 12. The second end of the first side cross pipe 311 of the second side folding mechanism 32 is rotatably connected with the foot fixing piece 41 at the lower end of the fixing pipe 4 of the fourth telescopic vertical rod 14, the second end of the second side cross pipe 312 of the second side folding mechanism 32 is rotatably connected with the foot fixing piece 41 at the lower end of the fixing pipe 4 of the third telescopic vertical rod 13, the second end of the third side cross pipe 313 of the second side folding mechanism 32 is rotatably connected with the foot fixing piece 51 at the upper end of the telescopic pipe 5 of the fourth telescopic vertical rod 14, and the second end of the fourth side cross pipe 314 of the second side folding mechanism 32 is rotatably connected with the foot fixing piece 51 at the upper end of the telescopic pipe 5 of the third telescopic vertical rod 13. The length of the first side cross pipe 311 and the second side cross pipe 312 with larger length increases the length of the first side folding mechanism 31 and the second side folding mechanism 32 in the unfolding state, the third side cross pipe 313, the fourth side cross pipe 314 and the x-shaped cross pipe assembly are arranged in an auxiliary mode to improve the stability of the first side folding mechanism 31 and the second side folding mechanism 32, the x-shaped cross pipe assembly is arranged in the middle blank area where the first side cross pipe 311, the second side cross pipe 312, the third side cross pipe 313 and the fourth side cross pipe 314 meet, gaps among the four side cross pipes are effectively supplemented, the overall strength of the side folding mechanism is improved, the supporting effect of the side folding mechanism is improved, articles with larger weight are placed in the folding trailer conveniently, and the practicability of the folding trailer is improved. When the first side folding mechanism 31 and the second side folding mechanism 32 are folded, the first side folding mechanism 31 and the second side folding mechanism 32 are folded through the extension of the four telescopic vertical rods 1, and the folding height is only increased when the folding volume is kept smaller, so that the volume of the trailer in the unfolded state is effectively increased under the condition of the original folding volume, the sliding of the telescopic pipe 5 is adopted to replace the original sliding sleeve, the sliding stability and smoothness are effectively improved, and the clamping stagnation phenomenon in the folding process is reduced.

Further, as shown in fig. 4, the x-type cross tube assembly includes a first cross tube 315 and a second cross tube 316 rotatably connected, a first end of the first cross tube 315 is rotatably connected to a tube body of the first side cross tube 311, a rotational connection point is located between a first end of the first side cross tube 311 and a rotational connection point of the third side cross tube 313 on the first side cross tube 311, and a second end of the first cross tube 315 is rotatably connected to a first end of the fourth side cross tube 314. The first end of the second cross tube 316 is rotatably connected to the body of the second side cross tube 312, and the rotational connection point is located between the first end of the second side cross tube 312 and the rotational connection point of the fourth side cross tube 314 on the second side cross tube 312, and the second end of the second cross tube 316 is rotatably connected to the first end of the third side cross tube 313.

As shown in fig. 1, 2, 3 and 5, the front folding mechanism 33 and the rear folding mechanism 34 are symmetrically installed and the mechanisms are identical, and each of the front folding mechanism 33 and the rear folding mechanism 34 includes a cross tube 331 and a cross straight tube 332 which are rotatably connected. In the manner of mounting the front folding mechanism 33 and the rear folding mechanism 34, the front folding mechanism 33 is specifically illustrated in the drawing, wherein the first end of the cross bent tube 331 of the front folding mechanism 33 is rotatably connected to the top leg fixing member 51 at the upper end of the telescopic tube 5 of the first telescopic upright 11, the second end of the cross bent tube 331 of the front folding mechanism 33 is rotatably connected to the bottom leg fixing member 41 at the lower end of the fixing tube 4 of the fourth telescopic upright 14, the first end of the cross straight tube 332 of the front folding mechanism 33 is rotatably connected to the top leg fixing member 51 at the upper end of the telescopic tube 5 of the fourth telescopic upright 14, and the second end of the cross straight tube 332 of the front folding mechanism 33 is rotatably connected to the bottom leg fixing member 41 at the lower end of the fixing tube 4 of the first telescopic upright 11. The first end of the cross bend 331 of the rear folding mechanism 34 is rotatably connected with the top leg fixing piece 51 at the upper end of the telescopic tube 5 of the second telescopic upright 12, the second end of the cross bend 331 of the rear folding mechanism 34 is rotatably connected with the bottom leg fixing piece 41 at the lower end of the fixed tube 4 of the third telescopic upright 13, the first end of the cross straight tube 332 of the rear folding mechanism 34 is rotatably connected with the top leg fixing piece 51 at the upper end of the telescopic tube 5 of the third telescopic upright 13, and the second end of the cross straight tube 332 of the rear folding mechanism 34 is rotatably connected with the bottom leg fixing piece 41 at the lower end of the fixed tube 4 of the second telescopic upright 12.

As shown in fig. 1 and 6, the bottom support mechanism 2 includes a bottom connecting piece 21 and four bottom connecting pipes 22, the bottom connecting piece 21 includes four connecting parts, the connecting parts are provided with mounting grooves with downward openings and horizontally arranged groove bottoms, and the first ends of the bottom connecting pipes 22 are positioned in the mounting grooves and are rotationally connected with the inner walls of the mounting grooves. When the bottom connecting pipe 22 rotates upwards from the inclined downward state when in the folded state to the state that the pipe wall is abutted against the bottom of the mounting groove, the bottom connecting pipe 22 cannot continue to rotate due to the limitation of the mounting groove, so that the horizontal state is maintained, and effective supporting force is provided for the bottom of the trailer. The second end of the bottom connecting tube 22 is also rotatably connected at a limited angle to the foot fixing member 41 at the lower end of the fixing tube 4, and has a similar structure to the first end. During folding of the trailer, the bottom connection piece 21 is driven to move upwards, the four bottom connection pipes 22 rotate downwards around the bottom connection piece 21 from a horizontal state when unfolded, and the four fixing pipes 4 are gathered with each other.

As shown in fig. 1 to 5, the folding trailer frame further includes a handle mechanism 6, where the handle mechanism 6 includes a telescopic rod 60, a first connecting tube 61 and a second connecting tube 62, and first ends of the first connecting tube 61 and the second connecting tube 62 are rotatably connected to connectors mounted on the telescopic rod 60, and second ends of the first connecting tube 61 and the second connecting tube 62 are rotatably connected to foot fixing members 41 at lower ends of two adjacent fixing tubes 4 in a one-to-one correspondence manner. Specifically, the rod body of the telescopic rod 60 is connected with a limiting member, the first end of the first connecting tube 61 is rotationally connected with the first side of the limiting member, the first end of the second connecting tube 62 is rotationally connected with the second side of the limiting member, the first side of the limiting member is opposite to the first telescopic upright rod 11, and the second side of the limiting member is opposite to the fourth telescopic upright rod 14. The first and second connecting pipes 61 and 62 are restricted by the stopper, and the first and second connecting pipes 61 and 62 can be rotated only downward from a state of being inclined upward in the folded state or upward from a state of being inclined upward in the unfolded state; the first and second connecting pipes 61 and 62 cannot be rotated further downward from the unfolded state. When the first connecting pipe 61 and the second connecting pipe 62 rotate around the rotating shaft at the second end, the free end of the telescopic rod 60 moves away from the trailer or approaches the trailer, and when the free end of the telescopic rod 60 moves away from the trailer, a certain included angle exists between the telescopic rod 60 and the plane where the first telescopic upright rod 11 and the fourth telescopic upright rod 14 are located, so that the telescopic rod is convenient for a user to drag. A pull ring is attached to a second end of telescoping rod 60 to further facilitate the towing of the trailer by the user. The lower extreme of arbitrary fixed pipe 4 all is provided with gyro wheel 7, preferably, and wherein, the gyro wheel 7 that the lower extreme of fixed pipe 4 of first flexible pole setting 11 and fourth flexible pole setting 14 set up is the universal wheel, further makes things convenient for the user to drag the trailer.

Further, the utility model also provides a trailer which comprises the cloth bag and a folding trailer frame. The cloth bag is located between four flexible pole setting 1, and four angles of cloth bag are connected with the top foot mounting 51 one-to-one of the flexible 5 upper ends of four flexible pole setting 1, and the bottom of cloth bag sets up on the bottom stay mechanism 2.

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 (10)

1. The folding trailer frame is characterized by comprising four telescopic vertical rods (1) which are arranged at intervals in a rectangular shape and a bottom support mechanism (2) arranged among the four telescopic vertical rods (1), wherein a folding mechanism (3) is arranged between any two adjacent telescopic vertical rods (1), and the folding mechanism (3) can be folded and contracted;

the telescopic vertical rod (1) comprises a fixed pipe (4) and a telescopic pipe (5), the fixed pipe (4) is vertically arranged, the bottom support mechanism (2) is rotationally connected with the lower end of the fixed pipe (4), the telescopic pipe (5) is slidably sleeved at the upper end of the fixed pipe (4), the upper end of the folding mechanism (3) is rotationally connected with the upper end of the telescopic pipe (5), and the lower end of the folding mechanism (3) is rotationally connected with the lower end of the fixed pipe (4);

the folded and contracted height of the folding mechanism (3) is higher than that of the fixed tube (4).

2. A folding trailer frame as claimed in claim 1, characterised in that the four folding mechanisms (3) comprise a first side folding mechanism (31), a second side folding mechanism (32), a front side folding mechanism (33) and a rear side folding mechanism (34); the four telescopic vertical rods (1) comprise a first telescopic vertical rod (11), a second telescopic vertical rod (12), a third telescopic vertical rod (13) and a fourth telescopic vertical rod (14);

the first side folding mechanism (31) is connected between the first telescopic vertical rod (11) and the second telescopic vertical rod (12), the second side folding mechanism (32) is connected between the third telescopic vertical rod (13) and the fourth telescopic vertical rod (14), the front side folding mechanism (33) is arranged between the first telescopic vertical rod (11) and the fourth telescopic vertical rod (14), and the rear side folding mechanism (34) is arranged between the second telescopic vertical rod (12) and the third telescopic vertical rod (13).

3. The folding trailer frame as claimed in claim 2, wherein said first side folding mechanism (31) and said second side folding mechanism (32) each comprise a first side cross tube (311), a second side cross tube (312), a third side cross tube (313), a fourth side cross tube (314) and an x-shaped cross tube assembly;

the first ends of the first side cross pipe (311) and the second side cross pipe (312) are rotationally connected, the pipe body of the third side cross pipe (313) is rotationally connected with the pipe body of the first side cross pipe (311), and the pipe body of the fourth side cross pipe (314) is rotationally connected with the pipe body of the second side cross pipe (312); the tube bodies of the first side cross tube (311) and the second side cross tube (312) are rotationally connected with the x-shaped cross tube assembly, and the first ends of the third side cross tube (313) and the fourth side cross tube (314) are rotationally connected with the x-shaped cross tube assembly;

the second end of the first side cross pipe (311) of the first side folding mechanism (31) is rotationally connected with the lower end of the fixed pipe (4) of the first telescopic vertical rod (11); the second end of the second side cross pipe (312) of the first side folding mechanism (31) is rotationally connected with the lower end of the fixed pipe (4) of the second telescopic vertical rod (12); the second end of the third side cross pipe (313) of the first side folding mechanism (31) is rotationally connected with the upper end of the telescopic pipe (5) of the first telescopic vertical rod (11); the second end of the fourth side cross pipe (314) of the first side folding mechanism (31) is rotationally connected with the upper end of the telescopic pipe (5) of the second telescopic vertical rod (12);

the second end of the first side cross pipe (311) of the second side folding mechanism (32) is rotatably connected with the lower end of the fixed pipe (4) of the fourth telescopic vertical rod (14); the second end of the second side cross pipe (312) of the second side folding mechanism (32) is rotatably connected with the lower end of the fixed pipe (4) of the third telescopic vertical rod (13); the second end of the third side cross pipe (313) of the second side folding mechanism (32) is rotatably connected with the upper end of the telescopic pipe (5) of the fourth telescopic vertical rod (14); the second end of the fourth side cross pipe (314) of the second side folding mechanism (32) is rotatably connected with the upper end of the telescopic pipe (5) of the third telescopic vertical rod (13).

4. A folding trailer frame as claimed in claim 3, characterised in that the x-shaped cross tube assembly comprises a first cross tube (315) and a second cross tube (316) which are rotatably connected;

the first end of the first cross middle pipe (315) is rotationally connected with the pipe body of the first side cross pipe (311), and a rotational connection point is positioned between the first end of the first side cross pipe (311) and the rotational connection point of the third side cross pipe (313) on the first side cross pipe (311); the second end of the first cross middle pipe (315) is rotationally connected with the first end of the fourth side cross pipe (314);

the first end of the second cross middle pipe (316) is rotationally connected with the pipe body of the second side cross pipe (312), and a rotational connection point is positioned between the first end of the second side cross pipe (312) and the rotational connection point of the fourth side cross pipe (314) on the second side cross pipe (312); the second end of the second cross center tube (316) is rotatably connected to the first end of the third side cross tube (313).

5. A folding trailer frame as claimed in claim 2, characterised in that the front side folding mechanism (33) and the rear side folding mechanism (34) each comprise a cross bend (331) and a cross straight tube (332) which are rotatably connected;

the first end of the crossed bent pipe (331) of the front folding mechanism (33) is rotationally connected with the upper end of the telescopic pipe (5) of the first telescopic vertical rod (11), the second end of the crossed bent pipe (331) of the front folding mechanism (33) is rotationally connected with the lower end of the fixed pipe (4) of the fourth telescopic vertical rod (14), the first end of the crossed straight pipe (332) of the front folding mechanism (33) is rotationally connected with the upper end of the telescopic pipe (5) of the fourth telescopic vertical rod (14), and the second end of the crossed straight pipe (332) of the front folding mechanism (33) is rotationally connected with the lower end of the fixed pipe (4) of the first telescopic vertical rod (11);

the first end of the crossed bent pipe (331) of the rear folding mechanism (34) is rotationally connected with the upper end of the telescopic pipe (5) of the second telescopic vertical rod (12), the second end of the crossed bent pipe (331) of the rear folding mechanism (34) is rotationally connected with the lower end of the fixed pipe (4) of the third telescopic vertical rod (13), the first end of the crossed straight pipe (332) of the rear folding mechanism (34) is rotationally connected with the upper end of the telescopic pipe (5) of the third telescopic vertical rod (13), and the second end of the crossed straight pipe (332) of the rear folding mechanism (34) is rotationally connected with the lower end of the fixed pipe (4) of the second telescopic vertical rod (12).

6. A folding trailer frame as claimed in any one of claims 1-5, characterised in that the lower end of the fixed tube (4) is provided with a foot fixing (41), the upper end of the telescopic tube (5) is provided with a foot fixing (51), the upper end of the folding mechanism (3) is rotatably connected with the foot fixing (51), and the lower end of the folding mechanism (3) is rotatably connected with the foot fixing (41).

7. A folding trailer frame as claimed in any one of claims 1-5, characterised in that the bottom stay means (2) comprises a bottom connection (21) and a bottom connection tube (22), a first end of the bottom connection tube (22) being rotatably connected to the bottom connection (21) at a limited angle, and a second end of the bottom connection tube (22) being rotatably connected to the lower end of the stationary tube (4) at a limited angle.

8. A folding trailer frame as claimed in any one of claims 1-5, characterised in that the folding trailer frame further comprises a pull handle mechanism (6);

the handle mechanism (6) comprises a telescopic rod (60), a first connecting pipe (61) and a second connecting pipe (62), wherein the first ends of the first connecting pipe (61) and the second connecting pipe (62) are rotationally connected with the telescopic rod (60), and the second ends of the first connecting pipe (61) and the second connecting pipe (62) are respectively rotationally connected with the lower ends of two adjacent fixed pipes (4) in a one-to-one correspondence manner.

9. A folding trailer frame as claimed in any one of claims 1-5, characterised in that the lower end of any one of said fixed pipes (4) is provided with rollers (7).

10. A trailer comprising a cloth bag and the folding trailer frame of claims 1-9;

the cloth bag is located four between the flexible pole setting (1), four angles of cloth bag with four flexible pole setting (1) the upper end one-to-one of flexible pipe (5) is connected, the bottom of cloth bag set up in on bottom stay mechanism (2).