Folding trailer

Abstract

The present application belongs to the technical field of trailer, and discloses a folding trailer. The folding trailer comprises a frame body, a plurality of wheel assemblies and a handle assembly, the frame body has an unfolded state and a folded state; the frame body comprises a frame structure composed of a chassis assembly, two oppositely arranged first enclosing walls and two oppositely arranged second enclosing walls; the first enclosing wall is composed of two groups of symmetrically arranged and mutually hinged side wall assemblies, wherein the upright column pipes, the connecting rod assemblies and the inclined support pipes are connected end to end and mutually hinged, the connecting rod assembly comprises a plurality of handrail pipes connected end to end, when the frame body is unfolded, the handrail pipes of the two side wall assemblies are in the same straight line; the wheel assembly is arranged at the bottom of the frame body; and the handle assembly is connected to any one of the second enclosing walls. The folding trailer occupies a small space in the folded state and is convenient to store; when in the unfolded state, the uppermost handrail pipes are in the same straight line, the overall mechanical strength is higher, and the folding trailer can be applied to the carrying of different objects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of trailers, in particular to a folding trailer. BACKGROUND

[0002] In daily life and production, luggage or goods are often needed to be carried, and trailer tools are often used in the process of carrying. The trailer is widely used in carrying things because of its convenient pushing and time-saving and labor-saving characteristics. Many trailers nowadays are installed with wheels under the flat plate for transportation. The flat plate of such trailers has no fence around, and the total amount of loaded luggage or goods is limited, and the trailer cannot be folded, and it needs to occupy a large space in the non-use state. With the improvement of people's living quality, the demand for foldable trailers is increasing. For example, in the use environment of camping, the trailer needs to be loaded into the car, and the trailer in the prior art is too large to be put into the car, and it also occupies a large space when stored and idle, which is inconvenient to use.

[0003] In the prior art, the frame enclosure of the folding trailer is mostly foldable structure in order to facilitate folding and storage. However, most of the trailers are cumbersome to operate when folding, and the space occupied after folding is still large, which affects storage and carrying. In addition, the overall strength of the folded trailer after unfolding is also affected, and when carrying heavy objects, the folding trailer may automatically retract due to connection failure, which seriously affects the use experience.

[0004] Therefore, it is urgent to provide a new type of folding trailer to solve the above technical problems in the prior art. SUMMARY

[0005] The present application aims to provide a folding trailer which occupies a small space in the folded state and is convenient to store, and the uppermost handrail pipe is in the same straight line in the unfolded state, the overall mechanical strength is higher, and it can be applied to the carrying of different objects.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] The folding trailer comprises a frame body, a plurality of wheel assemblies and a handle assembly, the frame body has an unfolded state and a folded state, the frame body comprises a frame structure composed of a chassis assembly, two oppositely arranged first enclosing walls and two oppositely arranged second enclosing walls, the first enclosing wall comprises two groups of symmetrically arranged and hingedly connected side wall assemblies, the side wall assembly comprises a vertical column pipe, a connecting rod assembly and an inclined support pipe, the vertical column pipe, the connecting rod assembly and the inclined support pipe are connected end to end and hingedly connected, the connecting rod assembly comprises a plurality of handrail pipes hingedly connected end to end, when the frame body is unfolded, the handrail pipes of the two side wall assemblies are in the same straight line, the plurality of wheel assemblies are arranged at the bottom of the frame body, and the handle assembly is connected to any one of the second enclosing walls.

[0008] Optionally, the handle pipe is provided with two handle pipes, one of which is a short handle pipe, and the other is a long handle pipe, one end of the short handle pipe is hingedly connected to the vertical column pipe, the other end is hingedly connected to one end of the long handle pipe, the other end of the long handle pipe is hingedly connected to the inclined support pipe through a support pipe joint, and the support pipe joints of the two side wall assemblies are hingedly connected to each other.

[0009] Optionally, the side wall assembly further comprises a support sheet assembly, the support sheet assembly comprises a short support sheet and a long support sheet, one end of the short support sheet is hingedly connected to the long handle pipe, the other end is hingedly connected to one end of the long support sheet, and the long support sheet is hingedly connected to the inclined support pipe.

[0010] Optionally, the other end of the long support sheet of the two side wall assemblies is hingedly connected to each other.

[0011] Optionally, the short support sheet is provided with a limiting boss near one end of the long support sheet, when the frame body is unfolded, the long support sheet abuts against the limiting boss and the short support sheet and the long support sheet are in the same straight line.

[0012] Optionally, the second enclosing wall comprises two side handle pipes and two side support pipes hingedly connected to each other, one end of one of the vertical column pipes is hingedly connected to one of the side handle pipes, the other end is hingedly connected to one end of one of the side support pipes, the other end of the side support pipe is hingedly connected to the other side handle pipe, and when the frame body is unfolded, the two side handle pipes are in the same straight line.

[0013] Optionally, when the frame body is unfolded, the two side handle pipes have a preset spacing.

[0014] Optionally, the handle assembly comprises a traction rod, the bottom end of the traction rod is hingedly connected with two connecting rods, one end of the two connecting rods is hingedly connected to the two vertical column pipes one by one, the hinged connection of the two side support pipes is provided with a fixed clamp, and the traction rod can be accommodated in the fixed clamp.

[0015] Optionally, the bottom frame assembly comprises a middle seat and four bottom support pipes, one end of each of the bottom support pipes is hingedly connected to the column pipe, and the other end of each of the bottom support pipes is hingedly connected, detachably connected or positionally connected to the middle seat.

[0016] Optionally, the middle seat is provided with four accommodating grooves, and the sidewalls of the accommodating grooves are each provided with a through hole, the through hole is used for inserting a fixing piece when the frame body is unfolded, so that one end of each of the bottom support pipes can be correspondingly accommodated and fixed in the accommodating groove.

[0017] Advantages:

[0018] In this embodiment, the frame body of the frame structure is composed of a bottom frame assembly, two oppositely arranged first enclosing walls and two oppositely arranged second enclosing walls. The frame body has an unfolded state and a folded state. Specifically, the first enclosing wall of the frame body comprises two groups of symmetrically arranged and hingedly connected sidewall assemblies, which are composed of column pipes, connecting rod assemblies and oblique support pipes connected end to end and hingedly connected to each other. When in the unfolded state, the plurality of handrail pipes of the connecting rod assembly are all in the same straight line, not only can the handrail pipes be used to place a bag or other accommodating member, but also can be used as a handrail to clasp the bracket. The structure is simpler, and the overall connection strength and mechanical strength can be improved, and is suitable for carrying heavy objects. When the frame body is transformed from the unfolded state to the folded state, the hinge of the plurality of handrail pipes is bent downward, so that the oblique support pipe rotates and approaches the column pipe, realizing the folding and storage of the first enclosing wall and the frame body. When in the folded state, it occupies less space. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the isometric view of the unfolded folding trailer provided by the embodiment of the present application;

[0020] Figure 2 is the top view of the unfolded folding trailer provided by the embodiment of the present application;

[0021] Figure 3 is the isometric view of the folded folding trailer provided by the embodiment of the present application;

[0022] Figure 4 is the schematic diagram of the folding process of the first enclosing wall provided by the embodiment of the present application;

[0023] Figure 5 is the schematic diagram of the folding process of the second enclosing wall provided by the embodiment of the present application.

[0024] In the drawings:

[0025] 100, bottom frame assembly; 110, middle seat; 120, bottom support pipe;

[0026] 200, first surrounding wall; 210, upright pipe; 221, short handrail pipe; 222, long handrail pipe; 230, inclined support pipe; 231, support pipe joint; 241, short support piece; 242, long support piece; 243, limiting boss;

[0027] 300, second surrounding wall; 310, side handrail pipe; 320, side support pipe; 330, hinge;

[0028] 400, wheel assembly;

[0029] 500, handle assembly; 510, traction rod; 520, connecting rod. DETAILED DESCRIPTION

[0030] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that, for the purpose of description, only the parts related to the application are shown in the drawings rather than all the parts.

[0031] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "above" and "above" of the first feature to the second feature include the vertical above and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical below and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0034] The following is combined Figures 1 to 5 The specific structure and technical solution of the folding trailer in this embodiment are described in detail.

[0035] Please refer to Figure 1 and Figure 4 In this embodiment, the folding trailer includes a frame body, a plurality of wheel assemblies 400, and a handle assembly 500. The frame body has an unfolded state (e.g., Figure 1 and Figure 2 (as shown) and folded state (as shown) Figure 3 (As shown); the frame body includes a frame structure composed of a base frame assembly 100, two opposing first enclosures 200, and two opposing second enclosures 300; the first enclosure 200 includes two sets of symmetrically arranged and hinged side wall assemblies, each side wall assembly including a column tube 210, a connecting rod assembly, and a diagonal support tube 230, the column tube 210, the connecting rod assembly, and the diagonal support tube 230 being connected end to end and hinged to each other, the connecting rod assembly including several handrail tubes hinged end to end, when the frame body is unfolded, the handrail tubes of the two side wall assemblies are all in a straight line; several wheel assemblies 400 are distributed at the bottom of the frame body; the handlebar assembly 500 is connected to any one of the second enclosures 300.

[0036] In this embodiment, the frame body consists of a base frame assembly 100, two opposing first enclosures 200, and two opposing second enclosures 300, forming a frame structure. This frame body has both an unfolded and a folded state. Specifically, the first enclosure 200 of the frame body includes two sets of symmetrically arranged and hinged side wall assemblies. Each side wall assembly is composed of a column tube 210, a connecting rod assembly, and an inclined support tube 230, all hinged together end-to-end. In the unfolded state, several handle tubes of the connecting rod assembly are aligned in a straight line, allowing for the placement of items such as cloth bags, as well as serving as handrails to secure brackets. This simplifies the structure and improves overall connection and mechanical strength, making it suitable for transporting heavy objects. Please refer to [reference needed]. Figure 4When the frame body is transformed from the unfolded state to the folded state, the hinge portions of the plurality of armrest tubes are bent downward, so that the inclined support tube 230 rotates and approaches the column tube 210, realizing the folding and storage of the first surrounding wall 200 and the frame body. When in the folded state, it occupies less space.

[0037] The wheel assembly 400 in the embodiment is a universal wheel assembly, and four universal wheel assemblies are arranged at the lower ends of the four column tubes 210. The universal wheel assembly can facilitate dragging or pushing the folding trailer in different directions. Details are not described herein.

[0038] Please refer to Figure 1 and Figure 2 In the embodiment, the above-mentioned chassis assembly 100 includes an intermediate seat 110 and four bottom support tubes 120. One end of each of the above-mentioned bottom support tubes 120 is hingedly connected to the above-mentioned column tube 210, and the other end of the above-mentioned bottom support tube 120 is hingedly, detachably or limitingly connected to the above-mentioned intermediate seat 110. When folding the folding trailer, the chassis assembly 100 is also folded. When folding, the end of the bottom support tube 120 can be detached from the intermediate seat 110, or the bottom support tube 120 can be rotated and hingedly connected to the intermediate seat 110, or the bottom support tube 120 can be limitingly connected to the intermediate seat 110. Sliding, the four bottom support tubes 120 are close to each other, so as to fold the chassis assembly 100.

[0039] Further, the above-mentioned intermediate seat 110 is provided with four accommodating grooves, and the side walls of the above-mentioned accommodating grooves are provided with through holes. When the above-mentioned frame body is unfolded, the above-mentioned through holes are used for inserting fixing members, so that one end of the above-mentioned bottom support tube 120 can be correspondingly accommodated and fixed in the above-mentioned accommodating groove. The bottom support tube 120 is accommodated in the accommodating groove, and the fixing member is inserted into the through hole to fix the support tube, so that the chassis assembly 100 remains stable, the four sides of the frame body are supported, the automatic folding of the frame body is avoided, and the stability of the folding trailer in the unfolded state is further improved.

[0040] Please refer to Figure 3 and Figure 5 The handle assembly 500 in the embodiment includes a towing rod 510, the bottom end of the above-mentioned towing rod 510 is hingedly connected with two connecting rods 520, one end of each of the two above-mentioned connecting rods 520 is hingedly connected to the two above-mentioned column tubes 210; the hinge portions of the two above-mentioned side support tubes 320 are provided with fixed clamps, and the above-mentioned towing rod 510 can be accommodated in the above-mentioned fixed clamps. Further, the top of the towing rod 510 is provided with a handle for manual or machine dragging. The towing rod 510 is a telescopic rod, which is convenient for carrying operation in different application scenarios.

[0041] The following will be described in combination with Figure 4The detailed structure of the first surrounding wall 200 in the embodiment is described in detail. Alternatively, the handrail pipe is provided with two, one of which is a short handrail pipe 221, and the other is a long handrail pipe 222. One end of the short handrail pipe 221 is hinged to the column pipe 210, and the other end is hinged to one end of the long handrail pipe 222. The other end of the long handrail pipe 222 is hinged to the inclined support pipe 230 through the support pipe joint 231. The support pipe joints 231 of the two side wall assemblies are hinged to each other. By providing two handrail pipes, one of which is a short handrail pipe 221, and the other is a long handrail pipe 222, the structure of the side wall assembly of the first surrounding wall 200 can be simplified, and the two support pipe joints 231 can limit each other to prevent the two side wall assemblies from rotating too much to cause the first surrounding wall 200 to be folded in the opposite direction, so that the two link assemblies of the first surrounding wall 200 are always in the same straight line when the folding trailer is in the unfolded state, ensuring the stability and mechanical strength of the connection.

[0042] Further, the side wall assembly further comprises a support sheet assembly, the support sheet assembly comprising a short support sheet 241 and a long support sheet 242. One end of the short support sheet 241 is hinged to the long handrail pipe 222, and the other end is hinged to one end of the long support sheet 242. The long support sheet 242 is hinged to the inclined support pipe 230. The side wall assembly thus arranged can form a triangle between the support sheet assembly, the long handrail pipe 222 and the inclined support pipe 230 when the folding state is in the unfolded state, ensuring the stability of the connection and the overall mechanical strength of the frame body.

[0043] Specifically, the other end of the long support sheet 242 of the two side wall assemblies is hinged to each other. When the frame body is in the unfolded state, the two support sheet assemblies are hinged to each other and form a triangle with the two long handrail pipes 222, further improving the stability of the connection and the overall mechanical strength of the frame body. When folding, the two long support sheets 242 are close to each other, and the short support sheet 241 and the long support sheet 242 of the support sheet assembly are close to each other and are bent upwards, finally realizing the folding of the first surrounding wall 200.

[0044] As a preferred embodiment, the short supporting piece 241 is provided with a limiting boss 243 near one end of the long supporting piece 242, and when the frame body is unfolded, the long supporting piece 242 abuts against the limiting boss 243 and the short supporting piece 241 is in the same straight line with the long supporting piece 242. When unfolded, the long supporting piece 242 abuts against the limiting boss 243, and the short supporting piece 241 is in the same straight line with the long supporting piece 242, so that the two supporting piece assemblies and the two long handrail pipes 222 form a triangle, and the supporting piece assembly and the long handrail pipe 222 and the inclined supporting pipe 230 form a triangle, thereby further ensuring the stability of the connection, ensuring that the folding trailer is locked when unfolded and improving the mechanical strength of the frame body.

[0045] Please refer to Figure 5 The second surrounding wall 300 in the embodiment includes two side handrail pipes 310 and two side supporting pipes 320 that are hingedly connected to each other, one end of the upright pipe 210 is hingedly connected to one of the side handrail pipes 310, the other end is hingedly connected to one end of one of the side supporting pipes 320, the other end of the side supporting pipe 320 is hingedly connected to the other side handrail pipe 310, and the two side handrail pipes 310 are in the same straight line when the frame body is unfolded. The second surrounding wall 300 arranged in this way can realize the mutual approach of the two upright pipes 210, and when folded, the two side supporting pipes 320 approach each other and the included angle becomes smaller, and at the same time the side handrail pipe 310 is bent upward to realize the folding of the second surrounding wall 300.

[0046] Specifically, the side handrail pipe 310 and the side supporting pipe 320 are connected through a hinge 330, which is a plastic part. It not only shortens the length of the side handrail pipe 310 and the side supporting pipe 320, further reducing the volume of the folding trailer when folded, but also facilitates the hinge connection of the side handrail pipe 310 and the side supporting pipe 320, making the hinge rotation more smooth, and the component is easy to produce, which can reduce the production cost.

[0047] As a preferred embodiment, the frame body has a preset distance between the two side handrail pipes 310 when unfolded. The side handrail pipes 310 arranged in this way can prevent the two side handrail pipes 310 from interfering with each other when folded and unfolded, thereby playing a role in avoiding interference.

[0048] When the folding trailer in the embodiment is folded, the middle seat 110 of the bottom frame assembly 100 is first pulled upward, the trailer frame body is unlocked, the four column pipes 210 are driven by the bottom support pipe 120 to move toward the center, the long handrail pipe 222 and the short handrail pipe 221 of the first surrounding wall 200 are bent downward, the short support piece 241 and the long support piece 242 are bent upward, so that the two inclined support pipes 230 are close to each other, the folding of the first surrounding wall 200 is realized; at the same time, the hinged part of the side handrail pipe 310 and the side support pipe 320 is bent upward, the two side support pipes 320 are close to each other, the folding of the second surrounding wall 300 is realized, so that the folding of the trailer frame body and the folding trailer is realized, and the folding state in the embodiment is realized. Figure 3

[0049] Obviously, the above embodiments of the present application are merely exemplary and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.​

Claims

1. A folding trailer characterised in that, The utility model relates to a kind of foldable bicycle, including: Frame body, the frame body has unfolded state and folding state;The frame body includes the frame structure consisting of underframe assembly (100), two oppositely arranged first enclosure wall (200) and two oppositely arranged second enclosure wall (300);The first enclosure wall (200) includes two groups of symmetrically arranged and mutually hinged side wall assembly, the side wall assembly includes upright tube (210), connecting rod assembly and inclined support tube (230), the upright tube (210), the connecting rod assembly and the inclined support tube (230) are connected head to tail and mutually hinged, the connecting rod assembly includes several handrail tubes connected head to tail and hinged, when the frame body is unfolded, the handrail tube of two the side wall assembly is in same straight line; Several wheel assemblies (400), several the wheel assembly (400) is distributed and is arranged in the bottom of the frame body; Handle assembly (500), the handle assembly (500) is connected to any one second enclosure wall (300); The handrail tube is provided with two, and one is short handrail tube (221), and the other is long handrail tube (222), the short handrail tube (221) one end is hinged to the upright tube (210), the other end is hinged to one end of the long handrail tube (222), the other end of the long handrail tube (222) is hinged with the inclined support tube (230) by support tube joint (231);Two the support tube joint (231) of side wall assembly is mutually hinged; The side wall assembly also includes support sheet assembly, the support sheet assembly includes short support sheet (241) and long support sheet (242), the short support sheet (241) one end is hinged to the long handrail tube (222), the other end is hinged to one end of the long support sheet (242), the long support sheet (242) is hinged to the inclined support tube (230); The short support sheet (241) is close to the end of the long support sheet (242) and is provided with limit boss (243), when the frame body is unfolded, the long support sheet (242) is abutted to the limit boss (243) and the short support sheet (241) and the long support sheet (242) are in same straight line.

2. The folding trailer of claim 1, wherein, The other end of the long support sheet (242) of two the side wall assembly is mutually hinged.

3. The folding trailer of claim 1, wherein, The second enclosure wall (300) includes two side handrail tubes (310) and two mutually hinged side support tubes (320), one end of one of the upright tube (210) is hinged to one of the side handrail tube (310), the other end is hinged to one end of one of the side support tube (320), the other end of the side support tube (320) is hinged to the other side handrail tube (310), when the frame body is unfolded, two the side handrail tube (310) is in same straight line.

4. The folding trailer of claim 3, wherein, When the frame body is unfolded, two the side handrail tube (310) has the interval of preset value between.

5. The folding trailer of claim 3, wherein, The handle assembly (500) comprises a traction rod (510), the bottom end of the traction rod (510) is hinged with two connecting rods (520), one end of the two connecting rods (520) is hinged with two column pipes (210) one by one; the hinged part of the two side support pipes (320) is provided with a fixing clamp, and the traction rod (510) can be accommodated in the fixing clamp.

6. The folding trailer of claim 1, wherein, The bottom frame assembly (100) comprises an intermediate seat (110) and four bottom support pipes (120), one end of the bottom support pipe (120) is hinged with the column pipe (210) one by one, and the other end of the bottom support pipe (120) is hinged, detachably connected or position-limitingly connected with the intermediate seat (110).

7. The folding trailer of claim 6, wherein, The intermediate seat (110) is provided with four accommodating grooves, and the side wall of the accommodating groove is provided with a through hole, when the frame body is unfolded, the through hole is used for inserting a fixing piece, so that one end of the bottom support pipe (120) can be accommodated and fixed in the accommodating groove one by one.

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