CN222780434U - Folding trailer and foldable trailer - Google Patents

Abstract

The utility model relates to a folding trailer and a folding short trailer, which comprise four upright posts, a bottom folding mechanism, a first folding mechanism, a third folding mechanism, a second folding mechanism, a fourth folding mechanism and a first sliding sleeve which is arranged on the upright posts in a sliding manner, wherein short pipes are hinged on the first sliding sleeve. The first folding mechanism and the second folding mechanism comprise a first cross assembly, at least one third cross assembly and a second cross assembly which are hinged in sequence, the first cross assembly and the second cross assembly comprise a first fork tube and a second fork tube, the first fork tube is hinged with the upper end of a corresponding upright post, and the short tube is hinged with the first fork tube. The first cross assembly, the third cross assembly, the second cross assembly, the third folding mechanism, the fourth folding mechanism and the bottom folding mechanism are all not higher than the height of the upper end of the stand column, so that the height of the folded trailer is not increased when the trailer is folded and gathered, and the folded trailer is convenient for a user to store and carry.

Description

Folding trailer and folding short trailer

Technical Field

The utility model relates to the technical field of trailers, in particular to a folding trailer and a folding shorter 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 after being folded.

However, the existing folding trailer has smaller volume in the unfolded state and fewer stored articles, and has larger volume in the folded state and larger occupied space, and is particularly inconvenient when being folded and stored in a place with limited space like an automobile trunk, thus seriously affecting the use experience of users.

Disclosure of utility model

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 and a folding shorter trailer, which solve the technical problems of a smaller volume in an unfolded state and a larger volume in a folded state of the folding trailer.

(II) technical scheme

In order to achieve the purpose, the folding trailer comprises four upright posts which are arranged at intervals in a rectangular shape, a bottom folding mechanism hinged between the four upright posts, a first folding mechanism, a third folding mechanism, a second folding mechanism, a fourth folding mechanism and a first sliding sleeve which is arranged on the upright posts in a sliding manner, wherein the first sliding sleeve is sequentially connected between two adjacent upright posts, and short pipes are hinged on the first sliding sleeve;

The first folding mechanism and the second folding mechanism comprise a first cross assembly, at least one third cross assembly and a second cross assembly which are sequentially hinged, wherein the first cross assembly and the second cross assembly comprise a first fork pipe and a second fork pipe, the first fork pipe is hinged with the upper end of the corresponding upright post, and the short pipe is hinged with the first fork pipe;

The folding heights of the first cross assembly, the third cross assembly, the second cross assembly, the third folding mechanism, the fourth folding mechanism and the bottom folding mechanism are not higher than the height of the upper end of the upright post.

Optionally, the first folding mechanism and the second folding mechanism are respectively a first cross assembly, a third cross assembly and a second cross assembly which are hinged in sequence.

Optionally, the folding trailer further comprises a first boom and a second boom,

The upper end of the first suspender is hinged with the first folding mechanism, the upper end of the second suspender is hinged with the second folding mechanism, and the lower ends of the first suspender and the second suspender are connected with the bottom folding mechanism;

the first suspender and the second suspender are flexible rods, the first suspender and the second suspender deform in the folding process of the folding trailer, and the two ends of the first suspender and the two ends of the second suspender are mutually close.

Optionally, the bottom folding mechanism comprises a first bottom support assembly and a second bottom support assembly which are symmetrically arranged and are mutually hinged, and the first bottom support assembly and the second bottom support assembly comprise a first bottom connecting piece, a first bottom connecting pipe, a second bottom connecting pipe, a third bottom connecting pipe and a fourth bottom connecting pipe;

The first ends of the first bottom connecting pipe, the second bottom connecting pipe, the third bottom connecting pipe and the fourth bottom connecting pipe are all rotationally connected with the first bottom connecting piece at a limited angle;

The second ends of the first bottom connecting pipe and the second bottom connecting pipe are respectively connected with the lower ends of the corresponding upright posts in a limited angle rotation mode.

Optionally, the bottom folding mechanism further comprises a second bottom connecting piece and a third bottom connecting piece which are symmetrically arranged, and the lower ends of the first suspender and the second suspender are respectively connected with the second bottom connecting piece and the third bottom connecting piece in a one-to-one correspondence manner;

The third bottom connecting pipes of the first bottom support assembly and the second bottom support assembly are rotatably connected with the third bottom connecting piece at a limited angle;

The fourth bottom connecting pipes of the first bottom support assembly and the second bottom support assembly are rotatably connected with the second bottom connecting piece at a limited angle.

Optionally, the four stand columns are a first stand column, a second stand column, a third stand column and a fourth stand column respectively;

The third folding mechanism and the fourth folding mechanism comprise a first cross pipe and a second cross pipe which are mutually hinged, and a third cross pipe and a fourth cross pipe which are mutually hinged, wherein the first ends of the first cross pipe and the third cross pipe are mutually hinged, and the first ends of the second cross pipe and the fourth cross pipe are mutually hinged;

In the fourth folding mechanism, the second end of the first cross pipe is hinged with the upper end of the fourth upright, the second end of the third cross pipe is hinged with the upper end of the first upright, the second end of the second cross pipe is hinged with the first sliding sleeve on the fourth upright, and the second end of the fourth cross pipe is hinged with the first sliding sleeve on the first upright;

In the third folding mechanism, the second end of the first cross pipe is hinged to the upper end of the second upright, the second end of the third cross pipe is hinged to the upper end of the third upright, the second end of the second cross pipe is hinged to the first sliding sleeve on the second upright, and the second end of the fourth cross pipe is hinged to the first sliding sleeve on the third upright.

Optionally, the folding trailer further comprises a handle mechanism;

The handle mechanism comprises a telescopic rod, a first transverse pipe, a second transverse pipe and a limiting piece, and the telescopic rod is in sliding connection with the limiting piece;

The first end of the first transverse pipe and the first end of the second transverse pipe are respectively connected with the two ends of the limiting piece in a limited angle rotating mode, and the second ends of the first transverse pipe and the second transverse pipe are respectively connected with the lower ends of the two stand columns of the fourth folding mechanism in a one-to-one correspondence mode.

The utility model further provides a folding short trailer, which comprises a lifting pipe and the folding trailer, wherein one end of the lifting pipe is hinged with the second sliding sleeve, the lifting pipe is in sliding connection with the upper ends of the corresponding upright posts, and the upper ends of the four lifting pipes can be respectively connected with four corners of a cloth pocket of the folding short trailer in a one-to-one correspondence manner;

When the folding trailer is converted from the unfolded state to the folded state, the upper end of the lifting tube is close to the upper end of the upright post in the vertical direction in the frame folding process;

the height of the folding trailer in the folded state is smaller than that of the folding trailer in the unfolded state, and the folding trailer is shortened after being folded.

Optionally, a connecting piece is arranged at the upper end of the lifting pipe and is connected with a corner of the cloth bag of the folding trailer.

(III) beneficial effects

First, the nozzle stub has increased the length of second fork tube effectively as the annex structure, has increased the length of first fork tube in step, and then has increased the expansion length of first folding mechanism and second folding mechanism, under the unchangeable circumstances of crossing subassembly quantity, has increased the volume after folding trailer expansion, if increase the volume after folding trailer expansion through increasing crossing subassembly quantity, then can increase folding trailer's weight, is inconvenient for the transport of trailer in vertical orientation. Second, under the unfolding state of the trailer, the included angle between the short pipe and the upright post is smaller than the included angle between the second fork pipe and the upright post, when the trailer is folded, the first sliding sleeve slides downwards, the second sliding sleeve slides towards the first end of the short pipe, the smaller the included angle between the short pipe and the upright post is, the smaller the included angle between the direction of force acting on the first sliding sleeve by the short pipe and the axial direction of the upright post is, the larger the first sliding stress is, and the sliding of the first sliding sleeve is smoother. Third, the contained angle between nozzle stub and the second binary pipe has been reduced to the nozzle stub, and the same goes for the slip of second sliding sleeve more smoothly, has improved the folding smoothness nature of trailer.

The folding height of the first cross assembly, the third cross assembly, the second cross assembly, the third folding mechanism, the fourth folding mechanism and the bottom folding mechanism is not higher than the height of the upper end of the upright post, so that the trailer is not increased after being folded and gathered, and the storage and the carrying of a user are facilitated.

Drawings

FIG. 1 is a schematic view of a folding trailer of the present utility model;

FIG. 2 is a perspective view of the folding trailer of the present utility model;

FIG. 3 is a front view of the folding trailer of the present utility model;

FIG. 4 is a left side view of the folding trailer of the present utility model;

FIG. 5 is a right side view of the folding trailer of the present utility model;

FIG. 6 is a top view of the folding trailer of the present utility model;

FIG. 7 is a schematic view of the folded condition of the folding trailer of the present utility model;

FIG. 8 is a schematic view of the structure of the folding shorter trailer of the present utility model;

FIG. 9 is a front view of the folding shorter trailer of the present utility model;

FIG. 10 is a left side view of the folding shorter trailer of the present utility model;

Fig. 11 is a schematic view showing a folded state of the folding dwarf trailer of the present utility model.

[ Reference numerals description ]

1, A first upright, a second upright, a third upright, a fourth upright and a third upright, wherein the first upright is 11, the second upright is 12, the third upright is 13, and the fourth upright is 14;

2, a bottom folding mechanism, 21, a first bottom support assembly and 22, a second bottom support assembly;

210, first bottom connecting piece, 211, 212, second bottom connecting piece, 213, third bottom connecting piece, 214, fourth bottom connecting piece, 216, second bottom connecting piece and 215, third bottom connecting piece;

31, 32, 33, 34, and 34, respectively, of a first folding mechanism, a second folding mechanism, a third folding mechanism and a fourth folding mechanism;

311, a first crossover assembly, 312, a second crossover assembly, 313, a third crossover assembly;

3111 first fork, 3112 second fork, 3113 third fork, 3114 fourth fork;

341, first cross tube, 342, second cross tube, 343, third cross tube, 344, fourth cross tube;

41, 42, a first sliding sleeve and a second sliding sleeve;

5, short tube;

6, a handle mechanism, 60, a telescopic rod, 61, a first transverse pipe, 62, a second transverse pipe and 63, a limiting piece;

71 a first boom 72 a second boom;

8, a roller;

100 parts of lifting pipe and 104 parts of connecting 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. 1.

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. 1-7, the present utility model provides a folding trailer and a folding short trailer, which comprises four upright posts 1 arranged at rectangular intervals, a bottom folding mechanism 2 hinged between the four upright posts 1 and having a hinge point at the lower end of the upright post 1, a first folding mechanism 31, a third folding mechanism 33, a second folding mechanism 32, a fourth folding mechanism 34 sequentially connected between two adjacent upright posts 1, and a first sliding sleeve 41 slidably arranged on the upright posts 1, wherein a short pipe 5 is hinged on the first sliding sleeve 41. Further, the four upright posts 1 are respectively a first upright post 11, a second upright post 12, a third upright post 13 and a fourth upright post 14, each upright post 1 is provided with a first sliding sleeve 41 in a sliding manner, each first sliding sleeve 41 is hinged with a short pipe 5, and the hinge point is located at the first end of the short pipe 5. The first folding mechanism 31 is connected between the first upright 11 and the second upright 12, the second folding mechanism 32 is connected between the third upright 13 and the fourth upright 14, the third folding mechanism 33 is connected between the second upright 12 and the third upright 13, and the fourth folding mechanism 34 is connected between the first upright 11 and the fourth upright 14.

As shown in fig. 2 and 3, each of the first folding mechanism 31 and the second folding mechanism 32 includes a first crossing member 311, a third crossing member 313 and a second crossing member 312 which are sequentially hinged, the number of the third crossing members 313 may be one or more, and the plurality of the third crossing members 313 are sequentially hinged. The first and second crossing members 311 and 312 each include first and second fork tubes 3111 and 3112 hinged to each other, the third crossing member 313 includes third and fourth fork tubes 3113 and 3114 hinged to each other, both ends of the third fork tube 3113 are hinged to the first fork tube 3111 of the first crossing member 311 and the second fork tube 3112 of the second crossing member 312, respectively, and both ends of the fourth fork tube 3114 are hinged to the second fork tube 3112 of the first crossing member 311 and the first fork tube 3111 of the second crossing member 312, respectively. In the first crossing assembly 311 and the second crossing assembly 312, the first crossing assembly 311 and the second crossing assembly 312 have the same structure and symmetrical positions, the first fork tube 3111 of the first crossing assembly 311 is hinged to the upper end of the first upright 11, and the first fork tube 3111 of the second crossing assembly 312 is hinged to the upper end of the second upright 12. Taking the first cross assembly 311 as an example, the second end of the short tube 5 is hinged to the tube body of the first fork tube 3111 of the first cross assembly 311, the short tube 5 is provided with the second sliding sleeve 42, and the end of the second fork tube 3112 of the first cross assembly 311 is hinged to the second sliding sleeve 42 on the short tube 5.

First, the short tube 5 is used as an accessory structure, the length of the second fork tube 3112 is effectively increased, the length of the first fork tube 3111 is synchronously increased, the unfolding lengths of the first folding mechanism 31 and the second folding mechanism 32 are further increased, under the condition that the number of crossed components is unchanged, the unfolded volume of the folded trailer is increased, if the unfolded volume of the folded trailer is increased by increasing the number of crossed components, the weight of the folded trailer is increased, the transportation of the folded trailer in the vertical direction is inconvenient, second, the included angle between the short tube 5 and the upright post 1 is smaller than the included angle between the second fork tube 3112 and the upright post 1 in the unfolded state of the trailer, the first sliding sleeve 41 slides downwards, the second sliding sleeve 42 slides towards the first end of the short tube 5, the included angle between the short tube 5 and the upright post 1 is smaller, the direction of the force acting on the first sliding sleeve 41 is smaller than the axial included angle of the upright post 1, the first sliding force is larger, the sliding of the first sliding sleeve 41 is smoother, and third, the included angle between the short tube 5 and the second sliding sleeve 3112 is smaller, and the second sliding sleeve 42 slides smoothly. Referring to fig. 7 and 11, the folding heights of the first cross assembly 311, the third cross assembly 313, the second cross assembly 312, the third folding mechanism 33, the fourth folding mechanism 34 and the bottom folding mechanism 2 are not higher than the height of the upper end of the upright 1, so that the trailer is ensured not to be increased after being folded and gathered, and the storage and the carrying of a user are facilitated.

In a preferred embodiment, the first folding mechanism 31 and the second folding mechanism 32 are a first cross assembly 311, a third cross assembly 313 and a second cross assembly 312 which are hinged in sequence, so that the trailer has a larger unfolding volume and a smaller folding volume, and the application experience of a user is improved.

As shown in fig. 2 and 3, the folding trailer further includes a first boom 71 and a second boom 72, the upper end of the first boom 71 is hinged with the first folding mechanism 31, the upper end of the second boom 72 is hinged with the second folding mechanism 32, the lower ends of the first boom 71 and the second boom 72 are respectively connected with the front side and the rear side of the bottom folding mechanism 2 in a one-to-one correspondence manner, and when the folding trailer is in an unfolded state, an upward pulling force is generated on the bottom folding mechanism 2, so that the supporting force of the bottom folding mechanism 2 is increased. Also, the first boom 71 and the second boom 72 are flexible rods, and may even be slings, such as cloth tapes, steel ropes, or the like. The first boom 71 and the second boom 72 are deformed by themselves during the folding process of the folding trailer, and both ends of the first boom 71 and the second boom 72 are closed to each other.

As shown in fig. 1 to 3 and 6, the bottom folding mechanism 2 includes a first bottom bracket assembly 21 and a second bottom bracket assembly 22 that are symmetrically disposed and hinged to each other, and each of the first bottom bracket assembly 21 and the second bottom bracket assembly 22 includes a first bottom bracket 210, a first bottom bracket 211, a second bottom bracket 212, a third bottom bracket 213, and a fourth bottom bracket 214. The first ends of the first bottom connecting pipe 211, the second bottom connecting pipe 212, the third bottom connecting pipe 213 and the fourth bottom connecting pipe 214 of the first bottom support assembly 21 are all rotatably connected with the first bottom connecting piece 210 of the first bottom support assembly 21 at a limited angle, and the first ends of the first bottom connecting pipe 211, the second bottom connecting pipe 212, the third bottom connecting pipe 213 and the fourth bottom connecting pipe 214 of the second bottom support assembly 22 are all rotatably connected with the first bottom connecting piece 210 of the second bottom support assembly 22 at a limited angle. Specifically, taking the illustration of the first bottom bracket assembly 21 as an example, the first bottom connecting piece 210 is symmetrically provided with four mounting grooves, and in the unfolded state of the trailer, the bottoms of the mounting grooves are horizontally arranged and the openings of the mounting grooves are downward, and the first ends of the bottom connecting pipes are respectively located in the corresponding mounting grooves and are rotationally connected with the inner walls of the mounting grooves. When each bottom connecting pipe rotates upwards from the inclined state when in the folded state compared with the first bottom connecting piece 210 until the pipe wall is abutted against the bottom of the mounting groove, each bottom connecting pipe 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 ends of the first and second bottom connecting pipes 211 and 212 are rotatably connected with the lower ends of the corresponding columns 1 at limited angles, respectively, and the structural form is similar to that of the first bottom connecting piece 210, except that the slots of the mounting grooves are upward, and the first and second bottom connecting pipes 211 and 212 are restricted from being rotated downward to a horizontal state only from an inclined state when in a folded state, compared with the mounting grooves of the lower ends of the columns 1.

Further, as shown in fig. 1, 2 and 6, the bottom folding mechanism 2 further includes a second bottom connecting piece 216 and a third bottom connecting piece 215 that are symmetrically arranged, and lower ends of the first boom 71 and the second boom 72 are respectively connected with the second bottom connecting piece 216 and the third bottom connecting piece 215 in a one-to-one correspondence manner. The third bottom connecting pipes 213 of the first and second bottom bracket assemblies 21 and 22 are rotatably connected to the third bottom connecting piece 215 at a limited angle, and the fourth bottom connecting pipes 214 of the first and second bottom bracket assemblies 21 and 22 are rotatably connected to the second bottom connecting piece 216 at a limited angle in a similar manner to the first bottom connecting piece 210, except that the slots of the mounting grooves of the second and third bottom connecting pieces 216 and 215 are upwardly restricted so that the third and fourth bottom connecting pipes 213 and 214 can be rotated only from the inclined state in the folded state to the horizontal state as compared with the mounting grooves of the second and third bottom connecting pieces 216 and 215. When the trailer needs to be folded, the two first bottom connecting pieces 210 are driven to move upwards, the four bottom connecting pipes connected with the corresponding first bottom connecting pieces 210 rotate from a horizontal state to an inclined state during unfolding, the bottom connecting pipes are mutually gathered, so that the four upright posts 1 are driven to mutually gather, the four upright posts 1 squeeze the first folding mechanism 31, the third folding mechanism 33, the second folding mechanism 32 and the fourth folding mechanism 34 to enable the first hanging rod 71 and the second hanging rod 72 to be folded and contracted, and the two ends of the first hanging rod 71 and the second hanging rod 72 are mutually gathered.

As shown in fig. 1, 4 and 5, the third folding mechanism 33 and the fourth folding mechanism 34 each include a first cross tube 341 and a second cross tube 342 hinged to each other and a third cross tube 343 and a fourth cross tube 344 hinged to each other, first ends of the first cross tube 341 and the third cross tube 343 are hinged to each other, and first ends of the second cross tube 342 and the fourth cross tube 344 are hinged to each other. In the fourth folding mechanism 34, the second end of the first cross tube 341 is hinged to the upper end of the fourth upright 14, the second end of the third cross tube 343 is hinged to the upper end of the first upright 11, the second end of the second cross tube 342 is hinged to the first sliding bush 41 on the fourth upright 14, and the second end of the fourth cross tube 344 is hinged to the first sliding bush 41 on the first upright 11. In the third folding mechanism 33, the second end of the first cross tube 341 is hinged to the upper end of the second upright 12, the second end of the third cross tube 343 is hinged to the upper end of the third upright 13, the second end of the second cross tube 342 is hinged to the first sliding sleeve 41 on the second upright 12, and the second end of the fourth cross tube 344 is hinged to the first sliding sleeve 41 on the third upright 13.

As shown in fig. 1, the folding trailer further includes a handle mechanism 6, specifically, referring to fig. 4, the handle mechanism 6 includes a telescopic rod 60, a first transverse tube 61, a second transverse tube 62, and a limiting member 63, and the telescopic rod 60 is slidably connected with the limiting member 63. The first ends of the first transverse tube 61 and the second transverse tube 62 are respectively in one-to-one corresponding rotary connection with the two ends of the limiting piece 63. Specifically, the first end of the first transverse tube 61 is rotatably connected to the first end of the stopper 63, and the first end of the second transverse tube 62 is rotatably connected to the second end of the stopper 63. The first cross tube 61 and the second cross tube 62 are restricted by the stopper 63, and the first cross tube 61 and the second cross tube 62 can only be rotated upward around the stopper 63 to be nearly horizontal from an inclined state in a folded state or rotated downward around the stopper 63 to be nearly vertical from an inclined state in an unfolded state. When folding, after the first transverse tube 61 and the second transverse tube 62 rotate, the telescopic rod 60 slides downwards, so that the height of the telescopic rod 60 is reduced, and meanwhile, the height of the telescopic rod 60 is further reduced through the shrinkage of the telescopic rod 60, so that the height of the handle mechanism 6 after folding and shrinkage is not higher than that of the upright post 1. The second ends of the first transverse pipe 61 and the second transverse pipe 62 are respectively in one-to-one corresponding rotation connection with the rotating parts which are arranged at the lower ends of the first upright post 11 and the fourth upright post 14 in a rotating mode, the rotating shafts of the rotating parts are perpendicular to the rotating shafts of the first transverse rod and the second transverse rod, when the rotating parts rotate, the free ends of the telescopic rods 60 do movement away from or close to the trailer, and when the free ends of the telescopic rods 60 are away from the trailer, certain included angles exist between the telescopic rods 60 and the planes where the first upright post 11 and the fourth upright post 14 are located, so that the telescopic rods are 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 1 stand all is provided with gyro wheel 8, preferably, and wherein, gyro wheel 8 that the lower extreme of first stand 11 and fourth stand 14 set up is the universal wheel, makes things convenient for the trailer turning operation.

As shown in fig. 8-11, the present utility model further provides a folding trailer comprising a lifting tube and the folding trailer described above, wherein the folding trailer is configured as shown in fig. 1-7, and a lifting tube 100 is hinged to each second sliding sleeve 42 on the folding trailer, and the hinge point is located at the lower end of the lifting tube 100. Taking the connection structure of the first cross assembly 311 and the lifting tube 100 as an example, the lower end of the lifting tube 100 is hinged to the second sliding sleeve 42 on the short tube 5 connected with the first cross assembly 311, and the tube body of the lifting tube 100 is slidably connected with the top leg fixing member at the upper end of the first upright 11. The upper ends of the four lifting pipes 100 are respectively connected with four corners of the cloth bag of the folding trailer in a one-to-one correspondence manner. The upper end of the lifting tube 100 slides downward during the process of the folding trailer from the unfolded state to the folded state, thereby making the height of the folding trailer short.

Referring to fig. 8 to 10, when the folding trailer is changed from the folded state to the unfolded state, the upper end of the lifting tube 100 is vertically far from the upper end of the upright 1, and the top of the cloth bag of the trailer is lifted upwards to be higher than the upper end of the upright 1 by the lifting tube 100, so that the overall height of the trailer is increased, and the capacity of the trailer is further increased. When the folding trailer is converted from the unfolded state to the folded state, the upper end of the lifting pipe 100 is close to the upper end of the upright post 1 in the vertical direction, so that the height of the folding trailer in the folded state is smaller than that in the unfolded state, and the folded height of the folding trailer is shortened. Specifically, in the process of unfolding the trailer, the upper end of the lifting tube 100 slides upwards to be far away from the upper end of the upright post 1, the unfolded state is shown in fig. 8 and 9, the unfolded height of the trailer is larger than the folded height, the trailer volume is increased, in the process of folding the trailer, the upper end of the lifting tube 100 slides downwards to be close to the upper end of the upright post 1, the folded state is shown in fig. 11, the folded height of the trailer is smaller than the unfolded state, the folded trailer is shorter, the folded volume is reduced, and the carrying and the storage of a user are facilitated.

Further, a connector 104 is provided at the upper end of the lifting tube 100, and the connector 104 is connected to a corner of a pocket of the folding trailer.

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, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship 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 (9)

1. The folding trailer is characterized by comprising four upright posts (1) which are arranged at intervals in a rectangular shape, a bottom folding mechanism (2) hinged between the four upright posts (1), a first folding mechanism (31), a third folding mechanism (33), a second folding mechanism (32) and a fourth folding mechanism (34) which are sequentially connected between two adjacent upright posts (1), and a first sliding sleeve (41) which is arranged on the upright posts (1) in a sliding manner, wherein a short pipe (5) is hinged on the first sliding sleeve (41);

The first folding mechanism (31) and the second folding mechanism (32) comprise a first cross component (311), at least one third cross component (313) and a second cross component (312) which are hinged in sequence, wherein the first cross component (311) and the second cross component (312) comprise a first fork tube (3111) and a second fork tube (3112), the first fork tube (3111) is hinged with the upper end of the corresponding upright post (1), the short tube (5) is hinged with the first fork tube (3111), a second sliding sleeve (42) is arranged on the short tube (5), and the second fork tube (3112) is hinged with the second sliding sleeve (42) on the corresponding short tube (5);

The folding height of the first crossing assembly (311), the third crossing assembly (313), the second crossing assembly (312), the third folding mechanism (33), the fourth folding mechanism (34) and the bottom folding mechanism (2) is not higher than the height of the upper end of the upright (1).

2. A folding trailer as claimed in claim 1, characterised in that said first folding mechanism (31) and said second folding mechanism (32) are each a first cross assembly (311), a third cross assembly (313), a second cross assembly (312) hinged in sequence.

3. The folding trailer of claim 1, further comprising a first boom (71) and a second boom (72),

The upper end of the first suspender (71) is hinged with the first folding mechanism (31), the upper end of the second suspender (72) is hinged with the second folding mechanism (32), and the lower ends of the first suspender (71) and the second suspender (72) are connected with the bottom folding mechanism (2);

The first suspender (71) and the second suspender (72) are flexible rods, the first suspender (71) and the second suspender (72) deform in the folding process of the folding trailer, and two ends of the first suspender (71) and two ends of the second suspender (72) are close to each other.

4. A folding trailer according to claim 3, wherein the bottom folding mechanism (2) comprises a first (21) and a second (22) bottom support assembly symmetrically arranged and hinged to each other, the first (21) and second (22) bottom support assemblies each comprising a first bottom connection (210), a first bottom connection (211), a second bottom connection (212), a third bottom connection (213) and a fourth bottom connection (214);

The first end of the first bottom connecting pipe (211), the second bottom connecting pipe (212), the third bottom connecting pipe (213) and the fourth bottom connecting pipe (214) are all rotationally connected with the first bottom connecting piece (210) at a limited angle;

The second ends of the first bottom connecting pipe (211) and the second bottom connecting pipe (212) are respectively connected with the lower ends of the corresponding upright posts (1) in a rotating way at a limited angle.

5. The folding trailer as claimed in claim 4, characterized in that the bottom folding mechanism (2) further comprises a second bottom link (216) and a third bottom link (215) which are symmetrically arranged, the lower ends of the first boom (71) and the second boom (72) being connected in a one-to-one correspondence with the second bottom link (216) and the third bottom link (215), respectively;

The third bottom connecting pipes (213) of the first bottom support assembly (21) and the second bottom support assembly (22) are rotatably connected with the third bottom connecting piece (215) at a limited angle;

The fourth base connection pipes (214) of the first base support assembly (21) and the second base support assembly (22) are rotatably connected with the second base connection piece (216) at a limited angle.

6. A folding trailer as claimed in claim 1, characterised in that the four uprights (1) are a first upright (11), a second upright (12), a third upright (13) and a fourth upright (14), respectively;

The third folding mechanism (33) and the fourth folding mechanism (34) each comprise a first cross pipe (341) and a second cross pipe (342) which are hinged to each other, and a third cross pipe (343) and a fourth cross pipe (344) which are hinged to each other, wherein first ends of the first cross pipe (341) and the third cross pipe (343) are hinged to each other, and first ends of the second cross pipe (342) and the fourth cross pipe (344) are hinged to each other;

In the fourth folding mechanism (34), a second end of the first cross tube (341) is hinged to an upper end of the fourth upright (14), a second end of the third cross tube (343) is hinged to an upper end of the first upright (11), a second end of the second cross tube (342) is hinged to the first sliding sleeve (41) on the fourth upright (14), and a second end of the fourth cross tube (344) is hinged to the first sliding sleeve (41) on the first upright (11);

In the third folding mechanism (33), the second end of the first cross pipe (341) is hinged to the upper end of the second upright (12), the second end of the third cross pipe (343) is hinged to the upper end of the third upright (13), the second end of the second cross pipe (342) is hinged to the first sliding sleeve (41) on the second upright (12), and the second end of the fourth cross pipe (344) is hinged to the first sliding sleeve (41) on the third upright (13).

7. A folding trailer as claimed in claim 1, characterised in that the folding trailer further comprises a handle mechanism (6);

The handle mechanism (6) comprises a telescopic rod (60), a first transverse pipe (61), a second transverse pipe (62) and a limiting piece (63), and the telescopic rod (60) is in sliding connection with the limiting piece (63);

The first ends of the first transverse tube (61) and the second transverse tube (62) are respectively connected with two ends of the limiting piece (63) in a limited angle rotating mode, and the second ends of the first transverse tube (61) and the second transverse tube (62) are respectively connected with the lower ends of the two upright posts (1) connected with the fourth folding mechanism (34) in a one-to-one correspondence mode.

8. A folding and dwarfing trailer is characterized by comprising lifting pipes and a folding trailer according to any one of claims 1-7, wherein one end of each lifting pipe (100) is hinged with the second sliding sleeve (42), the lifting pipes (100) are in sliding connection with the upper ends of the corresponding upright posts (1), and the upper ends of the four lifting pipes (100) can be respectively connected with four corners of a cloth pocket of the folding and dwarfing trailer in a one-to-one correspondence manner;

When the folding trailer is converted from the folded state to the unfolded state, the upper end of the lifting pipe (100) is far away from the upper end of the upright post (1) in the vertical direction in the frame unfolding process, and when the folding trailer is converted from the unfolded state to the folded state, the upper end of the lifting pipe (100) is close to the upper end of the upright post (1) in the vertical direction in the frame folding process;

the height of the folding trailer in the folded state is smaller than that of the folding trailer in the unfolded state, and the folding trailer is shortened after being folded.

9. The folding short trailer as claimed in claim 8, characterized in that the upper end of the lifting tube (100) is provided with a connecting piece (104), said connecting piece (104) being connected to a corner of the pocket of the folding trailer.