CN218489699U

CN218489699U - Folding trailer

Info

Publication number: CN218489699U
Application number: CN202222981654.XU
Authority: CN
Inventors: 詹建
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-02-17
Anticipated expiration: 2032-11-09

Abstract

The utility model provides a folding trailer, relating to the technical field of folding trailers and comprising a frame body, a connecting component, wheels and a pull rod mechanism; a flexible loading box is arranged in the frame body, and the connecting assembly comprises an upper connecting seat, a lower connecting seat and a telescopic rod for connecting the upper connecting seat and the lower connecting seat; the pull rod mechanism comprises two hinged pieces, two hinged rods, a connecting piece and a handle; two articulated elements are articulated with two adjacent telescopic links respectively, and two articulated rods's one end is articulated with two articulated elements elasticity respectively, and the other end is articulated with the both ends of connecting piece respectively, and the handle is connected with the connecting piece. When the folding trailer is unfolded, the distance between the two articulated elements is a fixed value, and at the moment, the two articulated elements, the two articulated rods and the connecting piece form a four-bar mechanism. According to the characteristics of the four-bar mechanism, the inclination angle of the connecting piece can be changed along with external force, so that the inclination angle of the handle is driven to change, and the direction of the whole handle is changed.

Description

Folding trailer

Technical Field

The utility model relates to a folding trailer technical field, more specifically relates to a folding trailer.

Background

The folding trailer is widely applied to the field of grocery consignment and other similar short-distance transportation. Because of having the foldable characteristic, the foldable umbrella can be folded and folded when not in use, thereby not occupying space and being convenient for outdoor carrying and use.

Publication No.: CN108725533A (published as 2018-11-02) discloses a portable folding trailer, which includes a frame and a pulling rod mechanism for pulling, wherein the pulling rod mechanism is rotated relative to a first pulling rod through a second pulling rod to make the pulling rod mechanism in a use state or a folding state, the first pulling rod can be engaged in a second positioning groove to keep the use state when in the use state, and the first pulling rod is engaged in the first positioning groove to keep the folding state when in the folding state. However, the pull rod mechanism has certain defects that the pull rod can only rotate towards one direction to realize unfolding or folding, the orientation of the pull rod is relatively fixed, the force application direction is not convenient to adjust by adjusting the orientation of the pull rod when articles are transported, and certain limitation is realized.

SUMMERY OF THE UTILITY MODEL

The utility model provides a folding trailer, its pull rod mechanism can adjust the direction in a flexible way, and the problem in the above-mentioned background art has been solved to the person's of facilitating the use application of force.

The embodiment of the utility model is realized like this:

some embodiments of the utility model provide a folding trailer, including frame body, coupling assembling, wheel and pull rod mechanism; the frame body comprises a bottom folding mechanism and four groups of shearing mechanisms which form a rectangle in a surrounding manner, the four groups of shearing mechanisms form circumferential side walls of the frame body, the bottom folding mechanism forms a bottom wall of the frame body, any two adjacent shearing mechanisms are connected through a connecting assembly, and a flexible loading box is arranged in the frame body;

the connecting assembly comprises an upper connecting seat, a lower connecting seat and a telescopic rod for connecting the upper connecting seat and the lower connecting seat, the top ends of any two adjacent scissor mechanisms are hinged with the upper connecting seat, the bottom ends of any two adjacent scissor mechanisms are hinged with the lower connecting seat, and wheels are mounted at the bottom end of the lower connecting seat;

the pull rod mechanism comprises two hinged pieces, two hinged rods, a connecting piece and a handle; the two hinged pieces are hinged with the outer side walls, close to the bottom ends, of the two adjacent telescopic rods respectively, one ends of the two hinged rods are elastically hinged with the two hinged pieces respectively, the other ends of the two hinged rods are hinged with the two ends of the connecting piece respectively, and the handle is connected with the connecting piece.

The utility model discloses an in some embodiments, two slide holes have been seted up to the connecting piece, and the bottom of handle has the slide bar that slides respectively and set up in two slide holes, and the inside of connecting piece articulates there is the cam piece, the cam piece simultaneously with two slide bar butts, the lateral wall of cam piece is provided with the portion of stirring that extends the connecting piece.

In some embodiments of the present invention, the sliding device further includes a limiting member, and the bottom end of the two sliding rods passing through the sliding hole is connected to the limiting member.

In some embodiments of the present invention, the hinge element is "u" -shaped, the bottom wall of the hinge element is hinged to the telescopic rod, an articulated shaft is arranged between the opposite side walls of the hinge element, a spring is sleeved on the articulated shaft, and a bending portion is arranged in the middle of the spring; the hinge bar rotates the cover and establishes on the articulated shaft, the lateral wall and the portion butt of bending of hinge bar.

The utility model discloses an in some embodiments, the telescopic link includes that sill bar and slip cap establish the ejector pin at sill bar top, and the top and the last connecting seat of ejector pin are connected, and the bottom and the lower connecting seat of sill bar are connected, and the articulated elements is articulated with the sill bar.

The utility model discloses an in some embodiments, still include the connecting pin, the connecting pin includes hollow round pin body and the round pin head that is located round pin body top, and the top of connecting seat and the border corner setting of loading the case are worn out on the top of telescopic link, and the top at the telescopic link is established to round pin body cover, and the centre gripping of the border corner of loading the case is between the top of round pin head and last connecting seat, and the round pin body is connected with telescopic link screw.

In some embodiments of the present invention, each group of scissor mechanisms includes a plurality of scissor units, each scissor unit includes two rod bodies hinged at the middle part, the top rod bodies of any adjacent scissor units are hinged to each other to form a supporting part, and the bottom ends of any adjacent scissor units are hinged to each other; the top end of the rod body of the scissor-type unit positioned at the edge is hinged with the upper connecting seat, and the bottom end of the rod body of the scissor-type unit positioned at the edge is hinged with the lower connecting seat; the top of the loading box is provided with a sleeve bag sleeved on the supporting part along the outer side wall.

The utility model discloses an in some embodiments, bottom folding mechanism includes end connecting seat and tip and four connecting rods of end connecting seat articulated, and four connecting rods are the radial distribution in center, and four connecting rods keep away from the tip of end connecting seat and articulate with lower connecting seat or shear type mechanism's lower pin joint respectively.

In some embodiments of the utility model, the inner diapire of loading case is provided with the lifting belt, and the bottom lateral wall of loading case is provided with the bandage that binds with end connecting seat.

In some embodiments of the present invention, the wheels are universal wheels with locks.

Compared with the prior art, the method has the advantages that, the embodiment of the utility model has following advantage or beneficial effect at least:

the utility model provides a folding trailer, folding and expansion through scissors mechanism and bottom folding mechanism realize folding and the expansion of whole folding trailer, facilitate the use and accomodate. The pull rod mechanism is used for a user to pull the folding trailer. When the folding trailer is unfolded, the distance between the two articulated elements is a fixed value, and at the moment, the two articulated elements, the two articulated rods and the connecting piece form a four-bar mechanism. According to the characteristics of the four-bar mechanism, the inclination angle of the connecting piece can be changed along with external force, so that the inclination angle of the handle is driven to change, and the change of the whole handle direction is realized. Simultaneously, two the one end of hinge bar is respectively with two articulated elements elasticity is articulated, and when dragging the handle, the handle can incline towards the direction that deviates from the frame body, and when loosening, handle self return and frame body laminating facilitate the use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of a folding trailer according to an embodiment of the present invention;

FIG. 2 is a front view of a drawbar mechanism according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 1;

FIG. 4 is an enlarged view of a portion B of FIG. 1;

FIG. 5 is a schematic view of a connection structure of an upper connection seat according to an embodiment of the present invention;

FIG. 6 is a schematic view of a connection structure of a lower connection seat according to an embodiment of the present invention;

FIG. 7 is a schematic view of a connection structure of the edge connection seat of the embodiment of the present invention;

FIG. 8 is a schematic view of a connection structure between the loading box and the upper connecting seat according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a scissor unit according to an embodiment of the present invention;

fig. 10 is a schematic view of a bottom folding mechanism according to an embodiment of the present invention;

FIG. 11 is a schematic view of a bottom structure of a loading compartment according to an embodiment of the present invention;

fig. 12 is a schematic view of the internal structure of the loading box according to the embodiment of the present invention.

Icon: 100-a loading box; 1-vehicle wheels; 2-a connector; 3-upper connecting seat; 4-lower connecting seat; 5, telescoping rods; 6-a hinge member; 7-a hinged lever; 8-a handle; 9-a hinged axis; 10-a spring; 11-bending part; 12-a slide bar; 13-a slide hole; 14-a cam member; 15-a toggle part; 16-a limit piece; 17-a bottom bar; 18-a mandril; 19-a scissor unit; 20-a rod body; 21-edge connection base; 22-bottom connection base; 23-a connecting rod; 24-a jack; 25-a connecting pin; 26-a support; 27-a socketed bag; 28-a lifting belt; 29-a strap; 30-a pin body; 31-pin head.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the embodiments of the present invention, "a plurality" represents at least two.

Examples

Please refer to fig. 1-12.

The present embodiment provides a folding trailer: comprises a frame body, a connecting component, a wheel 1 and a pull rod mechanism; the frame body comprises a bottom folding mechanism and four groups of scissor mechanisms which enclose a rectangle, the four groups of scissor mechanisms enclose the circumferential side wall of the frame body, the bottom folding mechanism forms the bottom wall of the frame body, any two adjacent scissor mechanisms are connected through a connecting assembly, and a flexible loading box 100 is arranged inside the frame body; the connecting assembly comprises an upper connecting seat 3, a lower connecting seat 4 and a telescopic rod 5 for connecting the upper connecting seat 3 and the lower connecting seat 4, the top ends of any two adjacent scissor mechanisms are hinged with the upper connecting seat 3, the bottom ends of any two adjacent scissor mechanisms are hinged with the lower connecting seat 4, and the wheel 1 is arranged at the bottom end of the lower connecting seat 4; the pull rod mechanism comprises two hinged parts 6, two hinged rods 7, a connecting part 2 and a handle 8; two articulated elements 6 are articulated with the lateral wall that two adjacent telescopic links 5 are close to the bottom respectively, and the one end of two articulated rods 7 is articulated with two articulated elements 6 elasticity respectively, and the other end of two articulated rods 7 is articulated with the both ends of connecting piece 2 respectively, and handle 8 is connected with connecting piece 2.

In this embodiment, the loading box 100 may be made of canvas and fixed inside the frame body to be deformed along with the folding of the frame body. Through the folding and the expansion of scissor mechanism and bottom folding mechanism, realize the folding and the expansion of whole folding trailer, facilitate the use and accomodate. The pull rod mechanism is used for a user to pull the folding trailer. When the frame body is unfolded, the distance between the two hinged parts 6 is a fixed value, at this time, because the hinged parts 6 are hinged with the telescopic rods 5, the hinged rods 7 are connected with the hinged parts 6, the end parts, far away from the hinged parts 6, of the hinged rods 7 are connected with the connecting pieces 2, and the hinged parts 6, the hinged rods 7 and the connecting pieces 2 form a four-bar mechanism (shown by dotted lines in the attached figure 2). According to the motion characteristics of the four-bar mechanism, the inclination angle of the connecting piece 2 can be changed along with external force, so that the inclination angle of the handle 8 is driven to change, and the direction of the whole handle 8 is changed. Meanwhile, one ends of the two hinge rods 7 are respectively and elastically hinged with the two hinge pieces 6, and the whole hinge rod 7 can rotate along the direction departing from the frame body. When dragging handle 8, handle 8 can incline towards the direction that deviates from the frame body, and when loosening handle 8, handle 8 self return and frame body laminating facilitate the use.

Furthermore, the articulated element 6 is U-shaped, the bottom wall of the articulated element 6 is articulated with the telescopic rod 5 through a shaft, an articulated shaft 9 is arranged between the opposite side walls of the articulated element 6, a spring 10 is sleeved on the articulated shaft 9, and the middle part of the spring 10 is provided with a bending part 11; articulated rod 7 rotates the cover and establishes on articulated shaft 9, and the lateral wall of articulated rod 7 and the portion 11 butt of bending.

The hinge shaft 9 is made of a bolt and a nut penetrating opposite side walls of the hinge member 6, and the spring 10 is fixedly sleeved on the hinge shaft 9. When the handle 8 moves in the direction departing from the frame body, the hinge rod 7 rotates along the hinge shaft 9 and is abutted against the bent part 11, and the spring 10 deforms and accumulates certain elastic potential energy. When the handle 8 is loosened, the spring 10 automatically resets under the action of the elastic potential energy, and the bent part 11 drives the hinged rod 7 to be attached to the frame body again, so that when the handle 8 is loosened, the handle 8 automatically resets to be attached to the frame body.

Furthermore, the connecting piece 2 is provided with two sliding holes 13, the bottom end of the handle 8 is provided with two sliding rods 12 which are respectively arranged in the two sliding holes 13 in a sliding manner, the connecting piece 2 is internally hinged with a cam piece 14, the cam piece 14 is simultaneously abutted against the two sliding rods 12, and the side wall of the cam piece 14 is provided with a toggle part 15 extending out of the connecting piece 2.

In the present embodiment, the cam member 14 is hinged to the joint member 2 by a shaft passing through the joint member 2 and the cam member 14 at the same time. Through the slide bar 12 sliding in the slide hole 13, the length of the handle 8 extending out of the top can be adjusted to be suitable for the length of an operator, and the adaptability is improved. After the handle 8 is adjusted to a proper position, the toggle part 15 is toggled to drive the cam part 14 to rotate, and the cam part 14 can compress the two sliding rods 12 to prevent the sliding rods 12 from sliding along the sliding holes 13, so that the position of the handle 8 is fixed. Simultaneously, after whole folding trailer is folded, can slide bar 12 down, make the top height of handle 8 be less than the top height of whole frame body to reduce and accomodate the volume, can reduce the packing volume when the vanning.

Furthermore, the device also comprises a limiting piece 16, and the bottom ends of the two sliding rods 12 penetrating through the sliding holes 13 are connected with the limiting piece 16. The limiting piece 16 is connected with the slide rod through a bolt or directly adhered and fixed. This arrangement prevents the slide rod 12 from sliding out of the slide hole 13 from the top, preventing the handle 8 from being separated from the link 2.

Further, the telescopic rod 5 comprises a bottom rod 17 and a top rod 18 which is sleeved on the top of the bottom rod 17 in a sliding manner, the top end of the top rod 18 is connected with the upper connecting seat 3, the bottom end of the bottom rod 17 is connected with the lower connecting seat 4, and the hinge piece 6 is hinged to the bottom rod 17.

In this embodiment, the top of the top rod 18 is connected with the upper connecting seat 3 by a screw or directly integrated with the upper connecting seat, and the bottom end of the bottom rod 17 is connected with the lower connecting seat 4 by a screw or directly integrated with the lower connecting seat. The fixed rod is sleeved on the top of the bottom rod 17 in a sliding mode, so that when the frame body is folded, the telescopic rod 5 extends and contracts.

Furthermore, each group of scissor mechanisms comprises a plurality of scissor units 19, each scissor unit 19 comprises two rod bodies 20 hinged at the middle part, and the top end and the bottom end of any adjacent scissor unit 19 are hinged with each other; the top end of the rod body 20 of the edge scissor unit 19 is hinged with the upper connecting seat 3, and the bottom end of the rod body 20 of the edge scissor unit 19 is hinged with the lower connecting seat 4.

In this embodiment, for four sets of scissors forming a rectangle, two sets of opposing scissors include two sets of scissors units 19, and the other two sets of opposing scissors include three sets of scissors units 19. Each set of scissor units 19 is folded and unfolded by two centrally hinged rods 20. The pull rod mechanism is arranged on one of the scissor mechanisms with two sets of scissor units 19. For a scissor mechanism provided with two scissor units 19, the top and bottom of two adjacent scissor units 19 in each scissor mechanism are directly hinged by a shaft. For the scissor mechanism provided with three scissor units 19, the tops of two adjacent scissor units 19 in each scissor mechanism are directly hinged through a shaft, and the bottoms of the two scissor units are simultaneously hinged with the side connecting seat 21 to realize indirect hinging of the two scissor units. The edge connector base 21 also serves as a connection to the bottom folding mechanism. In detail, the bottom folding mechanisms are provided with two groups, and the two groups of bottom folding mechanisms are arranged in an inserting mode. Each group of bottom folding mechanisms comprises a bottom connecting seat 22 and four connecting rods 23, the end parts of the four connecting rods 23 are hinged with the bottom connecting seat 22, and the four connecting rods 23 are radially distributed in the center. In each group of bottom folding mechanisms, the end parts of two connecting rods 23 far away from the bottom connecting seats 22 are respectively hinged with the two bottom connecting seats 22, and the end parts of the other two connecting rods 23 far away from the bottom connecting seats 22 are respectively hinged with the two oppositely arranged side connecting seats 21. The two sets of bottom folding mechanisms form the bottom structure of the whole frame body.

In other embodiments, each set of scissor structures may also be provided with other numbers of scissor units 19, such as four or five sets.

Further, the connection of the loading box 100 and the frame body is specifically as follows:

the connecting device further comprises a connecting pin 25, the connecting pin 25 comprises a hollow pin body 30 and a pin head 31 positioned at the top end of the pin body 30, the top end of the telescopic rod 5 penetrates through the top of the upper connecting seat 3, a jack 24 is formed in the corner of the edge of the loading box 100, the telescopic rod 5 penetrates through the top end of the upper connecting seat 3 and is arranged in the jack 24, the pin body 30 is sleeved at the top end of the telescopic rod 5, the corner of the edge of the loading box 100 is clamped between the pin head 31 and the top of the upper connecting seat 3, and the pin body 30 is in screw connection with the telescopic rod 5.

Further, the top rod bodies 20 of any adjacent scissor units 19 are hinged to each other to form a supporting portion 26, and the top edge of the loading box 100 is provided with a sleeving bag 27 sleeved on the supporting portion 26 along the outer side wall. At this time, since the edge of the loading box 100 is fitted over the support portion 26, the edge of the loading box 100 does not swing arbitrarily, and the stability of the loading box 100 is ensured.

Further, the inner bottom wall of the loading box 100 is provided with a lifting belt 28, and the outer bottom wall of the loading box 100 is provided with a binding band 29 bound with the bottom coupling seat 22. When it is desired to fold the entire folding trailer, the bottom attachment base 22 in the bottom folding mechanism needs to be pulled upwardly. However, since the bottom connection seat 22 is shielded by the loading box 100 and cannot be directly pulled, the loading box 100 is bound with the second connection seat, and then the lifting belt 28 is pulled, so that the bottom connection seat 22 can be indirectly pulled upwards, and the folding of the folding trailer is realized.

Further, the wheel 1 is a universal wheel with lock. The universal wheel that the universal wheel can lock is locked to the area, is prior art. When the folding trailer stops at a certain position, the universal wheels are locked, and the folding trailer can be prevented from moving by itself.

To sum up, the utility model provides a folding trailer through scissor mechanism and bottom folding mechanism's folding and expansion, realizes folding and the expansion of whole folding trailer, facilitates the use and accomodates. The pull rod mechanism is used for a user to pull the folding trailer. When the folding trailer is unfolded, the distance between the two articulated elements 6 is a fixed value, and at the moment, the two articulated elements 6, the two articulated rods 7 and the connecting piece 2 form a four-bar mechanism. According to the characteristics of the four-bar mechanism, the inclination angle of the connecting piece 2 can be changed along with external force, so that the inclination angle of the handle 8 is driven to change, and the change of the position of the whole handle 8 is realized. Simultaneously, the one end of two articulated arms 7 is articulated with two articulated elements 6 elasticity respectively, and when dragging handle 8, handle 8 can incline towards the direction that deviates from the frame body, and when loosening, handle 8 self return and frame body laminating facilitate the use.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding trailer is characterized by comprising a frame body, a connecting assembly, wheels and a pull rod mechanism; the frame body comprises a bottom folding mechanism and four groups of shear mechanisms which are encircled to form a rectangle, the four groups of shear mechanisms are encircled to form circumferential side walls of the frame body, the bottom folding mechanism forms a bottom wall of the frame body, any two adjacent shear mechanisms are connected through the connecting assembly, and a flexible loading box is arranged in the frame body;

the connecting assembly comprises an upper connecting seat, a lower connecting seat and a telescopic rod for connecting the upper connecting seat and the lower connecting seat, the top ends of any two adjacent scissor mechanisms are hinged with the upper connecting seat, the bottom ends of any two adjacent scissor mechanisms are hinged with the lower connecting seat, and the wheels are arranged at the bottom ends of the lower connecting seat;

the pull rod mechanism comprises two hinged pieces, two hinged rods, a connecting piece and a handle; the two articulated elements are respectively articulated with the adjacent two outer side walls of the telescopic rods close to the bottom ends, one ends of the two articulated rods are respectively elastically articulated with the two articulated elements, the other ends of the two articulated rods are respectively articulated with the two ends of the connecting piece, and the handle is connected with the connecting piece.

2. The folding trailer according to claim 1, wherein the connecting member is provided with two sliding holes, the bottom end of the handle is provided with sliding rods which are respectively slidably arranged in the two sliding holes, the inside of the connecting member is hinged with a cam member, the cam member is simultaneously abutted against the two sliding rods, and the side wall of the cam member is provided with a shifting part extending out of the connecting member.

3. The folding trailer of claim 2, further comprising a stopper, wherein the two sliding rods are connected with the stopper through the bottom ends of the sliding holes.

4. The folding trailer of claim 1, wherein said U-shaped hinge member has a bottom wall hinged to said telescopic rod, and a hinge shaft is disposed between opposite side walls of said hinge member, and a spring is sleeved on said hinge shaft, and a bent portion is disposed in the middle of said spring; the hinge rod rotates the cover and establishes on the articulated shaft, the lateral wall of hinge rod with bend the portion butt.

5. The folding trailer of claim 1, wherein the retractable rod comprises a bottom rod and a top rod slidably sleeved on the top of the bottom rod, the top end of the top rod is connected with the upper connecting seat, the bottom end of the bottom rod is connected with the lower connecting seat, and the hinge member is hinged to the bottom rod.

6. The folding trailer according to claim 1, further comprising a connecting pin, wherein the connecting pin comprises a hollow pin body and a pin head located at the top end of the pin body, the top end of the telescopic rod penetrates through the top of the upper connecting seat and the edge corner of the loading box, the pin body is sleeved on the top end of the telescopic rod, the edge corner of the loading box is clamped between the pin head and the top of the upper connecting seat, and the pin body is in screw connection with the telescopic rod.

7. The folding trailer of claim 1, wherein each of said scissor mechanisms comprises a plurality of scissor units, each of said scissor units comprising two rods hinged at a center portion, wherein top rods of any adjacent scissor units are hinged to each other to form a support portion, and wherein bottom ends of any adjacent scissor units are hinged to each other; the top end of the rod body of the scissor unit positioned at the edge is hinged with the upper connecting seat, and the bottom end of the rod body of the scissor unit positioned at the edge is hinged with the lower connecting seat; the top of the loading box is provided with a sleeve bag sleeved on the supporting part along the outer side wall.

8. The folding trailer of claim 1, wherein the bottom folding mechanism comprises a bottom connecting seat and four connecting rods hinged at ends to the bottom connecting seat, the four connecting rods are radially distributed at the center, and ends of the four connecting rods far away from the bottom connecting seat are hinged to the lower connecting seat or a lower hinge point of the scissor mechanism respectively.

9. A folding trailer according to claim 8, wherein the inner bottom wall of said stowage box is provided with a lifting strap and the outer bottom wall of said stowage box is provided with a strap for tying up with said bottom attachment socket.

10. A folding trailer in accordance with claim 1, wherein the wheels are lockable casters.