CN220147369U - Flat folding hand trailer - Google Patents

Abstract

The utility model discloses a flat folding hand trailer which comprises a frame structure composed of a symmetrical front wall, a symmetrical rear wall, two symmetrical side walls and a bottom frame, wherein rollers are arranged at the bottom of the frame structure, a handle assembly is arranged on the rear wall, the front wall is identical to the rear wall, the flat folding hand trailer comprises two fixing seats, two telescopic pipes, an upper transverse pipe and a lower transverse pipe, wherein the upper transverse pipe and the lower transverse pipe are connected with the two telescopic pipes, and the fixing seats are arranged at the tops of the telescopic pipes; the side wall comprises at least two hinged X-shaped cross pipes, and the upper end and the lower end of the front side or the rear side of the side wall are respectively riveted with the fixed seat and the underframe; the underframe comprises two symmetrically hinged underframes, and the front side and the rear side of the underframe are respectively riveted with the front wall and the lower transverse tube of the rear wall; the handle assembly is rotationally connected with the lower transverse tube of the front wall, and the bottom of the telescopic tube is provided with a roller. The folding type folding and unfolding integrated folding device has the advantages of simple overall structure, capability of realizing folding and folding rapidly, small occupied space after folding and convenience in transportation and outgoing carrying in the production process.

Description

Flat folding hand trailer

Technical Field

The utility model belongs to the technical field of trolleys, and particularly relates to a flat folding trolley.

Background

The cart is an indispensable transportation tool for pushing and pulling a vehicle for transportation by human force, and in some places where large-sized transportation machines are unfavorable for transportation in a narrow space.

Common handcart is, and the handle drives cargo platform that the bottom was equipped with the gyro wheel like dull and stereotyped or hopper, all carries out fixed mounting through modes such as welding or screw nut between handle, cargo platform and the gyro wheel, and whole size shape is fixed, can not the apron. Therefore, the handcart occupies a large space in the boxing transportation or use process, the assembly process is complex, and the handcart needs to be packaged and transported by a packing box with a size more corresponding to that of the handcart, and is not beneficial to carrying and use when people go out for travel or shopping. The chinese patent with the publication number of CN219192301U discloses a handcart with anti-collision protection function, including removing supporting mechanism, it includes the bottom plate to remove supporting mechanism, the removal wheel is installed in bottom plate lower extreme four corners, bottom plate one side is fixed with the handrail, is convenient for carry out the propelling movement to whole, the bottom plate upper end is provided with the hurdle for block the storage article. The cart in this patent is fixed in size and cannot be folded, which is disadvantageous for packing and transportation.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the flat folding hand trailer which has a simple integral structure, can rapidly realize flat folding storage, occupies little space after folding, and is convenient for transportation and outgoing carrying in the production process.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the flat folding hand trailer comprises a frame structure composed of a symmetrical front wall, a symmetrical rear wall, two symmetrical side walls and a bottom frame, wherein rollers are arranged at the bottom of the frame structure, a handle assembly is arranged on the rear wall, the front wall is identical to the rear wall, the flat folding hand trailer comprises two fixing seats, two telescopic pipes, an upper transverse pipe and a lower transverse pipe, wherein the upper transverse pipe and the lower transverse pipe are connected with the two telescopic pipes, and the fixing seats are arranged at the tops of the telescopic pipes; the side wall comprises at least two hinged X-shaped cross pipes, and the upper end and the lower end of the front side or the rear side of the side wall are respectively riveted with the fixed seat and the underframe;

the underframe comprises two symmetrically hinged underframes, and the front side and the rear side of the underframe are respectively riveted with the front wall and the lower transverse tube of the rear wall; the handle assembly is rotationally connected with the lower transverse tube of the front wall, and the bottom of the telescopic tube is provided with a roller.

Furthermore, the side wall also comprises two connecting pipes, the number of the X-shaped cross pipes is two, and the X-shaped cross pipes are formed by riveting long pipes and short pipes; the upper ends of the two long pipes are hinged, and the upper ends of the short pipes and the lower ends of the long pipes are respectively riveted with the fixed seat and the underframe; the upper end of each connecting pipe is riveted with the upper section of one long pipe, and the lower end is hinged with the lower end of the short pipe.

Furthermore, the side wall also comprises two connecting pipes, the number of the X-shaped cross pipes is two, and the X-shaped cross pipes are formed by riveting long pipes and short pipes; the lower ends of the two long pipes are hinged, the upper ends of the long pipes and the lower ends of the short pipes are respectively riveted with the fixed seat and the underframe, the upper ends of the connecting pipes are hinged with the upper ends of the short pipes, and the lower ends of the connecting pipes are riveted with the lower sections of the long pipes.

Further, the hinges in the side walls are connected through hinge parts, and the hinge parts comprise left connecting parts and right connecting parts which are symmetrical in structure; the left connecting piece or the right connecting piece comprises a riveting part and an inserting part, the left connecting piece is riveted with the two riveting parts of the right connecting piece, and the inserting part is inserted into the side long pipe or the side short pipe or the cross pipe or the side rod and is fixed.

Further, the bottom frame comprises two bottom frame side pipes, a long transverse pipe, a short transverse pipe and bottom frame longitudinal pipes, the two bottom frame longitudinal pipes are symmetrically arranged left and right and narrow from front to back and inwards, the narrow sides of the two bottom frames are hinged, and the wider sides are riveted with the lower transverse pipes; parallel long transverse pipes and short transverse pipes are arranged between the two chassis longitudinal pipes, the short transverse pipes are arranged on the narrowing sides, and two ends of the chassis longitudinal pipes are fixed with the middle parts of the long transverse pipes and the short transverse pipes.

Furthermore, in the bottom frame, the narrowed sides of the two bottom frame side pipes are respectively provided with a vertical pipe groove type piece with a downward opening, the vertical pipe groove type piece is provided with a connecting part extending downwards towards the center side, and the two bottom frames are riveted corresponding to the two connecting parts on the left side or the right side.

Further, the underframe also comprises four U-shaped underframe fixing pieces, the underframe fixing pieces are fixed on the left inner side and the right inner side of the lower transverse tube, and the wider sides of the underframe side tubes are embedded into U-shaped openings of the underframe fixing pieces for riveting.

Further, the handle assembly comprises a handle, a telescopic rod and a pull rod connecting piece which are sequentially arranged from top to bottom, wherein the pull rod connecting piece is rotationally connected with a lower transverse tube of the front wall, and the rotating angle is in the direction towards or away from the front wall.

Still further, the handle assembly also includes the U-shaped piece, is fixed in the front side at lower cross tube middle part, the pull rod connecting piece is embedded in the riveting of U-shaped piece.

Further, among the rollers, the roller below the front wall adopts universal wheels, and the rear wall adopts directional wheels.

Further, the frame structure also comprises a trailer cloth bag which is arranged in the frame structure.

Furthermore, the four sides of the trailer cloth bag are detachably connected with the front wall, the rear wall and the two side walls respectively.

By adopting the technical scheme of the utility model, the beneficial effects of the utility model are as follows: the folding trolley has the advantages that the folding of the two X-shaped cross pipes on the side wall and the folding of the two bottom frames forming the underframe towards the middle enable the whole trolley to be folded flatly and stored when not in use, the whole trolley is simple in structure, simple and rapid in folding, small in size after folding, low in space occupancy rate, more convenient to carry and transport compared with a traditional non-folding trolley, and small in size after folding; can be placed in people and automobiles for carrying and using, is also convenient for batch packing after production of enterprises, and reduces packing and transportation cost.

Drawings

FIG. 1 is an angled perspective view of a first flat-fold hand truck;

FIG. 2 is another angular perspective view of the first flat-fold hand truck;

FIG. 3 is a first side schematic view of a flat-fold hand truck;

FIG. 4 is a schematic view of the front wall of a flat-fold hand truck;

FIG. 5 is a schematic illustration of a top view of a flat-fold hand truck trailer;

FIG. 6 is a perspective view of a second flat-fold hand truck;

FIG. 7 is a schematic side view of a second flat-fold hand truck;

FIG. 8 is a perspective view of a third flat-fold hand truck;

fig. 9 is a schematic side view of a third flat-fold hand truck.

In the figure: 1 front wall, 11 upper transverse tube, 12 telescopic tube, 13 lower transverse tube, 14 fixed seat, 2 rear wall, 3 side wall, 30X-shaped cross tube, 31 long tube, 32 short tube, 33 connecting tube, 34 hinged piece, 34a left connecting piece, 34b right connecting piece, 4 bottom frame, 41a bottom frame side tube, 41b long transverse tube, 41c short transverse tube, 41d underframe longitudinal tube, 42 longitudinal tube groove type piece, 42a connecting part, 43 underframe fixing piece, 5 idler wheels, 51 orientation wheels, 52 universal wheels, 6 handle assembly, 61 handle, 62 telescopic rod, 63 pull rod connecting piece, 64U-shaped piece and 7 trailer cloth bag.

Detailed Description

The specific embodiments of the specific scheme of the utility model are further described with reference to the accompanying drawings, so that the technical scheme is clearer and more obvious.

Example 1

As shown in fig. 1-5, a flat folding hand trailer comprises a frame structure composed of a symmetrical front wall 1, a symmetrical rear wall 2, two symmetrical side walls 3 and a bottom frame 4, wherein rollers are arranged at the bottom of the frame structure, and a handle assembly is arranged on the rear wall. When assembled, the front wall 1, the rear wall 2, the side walls 3 and the underframe 4 are assembled independently and then assembled into a handcart.

The front wall 1 and the rear wall 2 in the embodiment have the same structure, the front wall 1 comprises two fixing seats 14, two telescopic pipes 12, an upper transverse pipe 11 and a lower transverse pipe 13 which are connected with the two telescopic pipes 12, the telescopic pipes 12 comprise an upper pipe and a lower pipe, and the lower pipe is positioned in the upper pipe and extends upwards; the upper transverse tube 11, the lower transverse tube 13 and the two telescopic tubes 12 (specifically, the lower tubes) are fixed to form a rectangular frame, and the fixing base 14 is arranged on the top of the telescopic tubes 12 (specifically, the upper tubes). The side wall 3 comprises an X-shaped cross pipe riveted by a long pipe 31 and a short pipe 32 and two connecting pipes 33, the upper ends of the two long pipes 31 are hinged, and the upper ends of the short pipes 32 and the lower ends of the long pipes 31 are respectively riveted with the fixed seat 14 and the underframe 4; the upper end of each connecting tube 33 is riveted with the upper section of one long tube 31, and the lower end is hinged with the lower end of one short tube 32. The underframe 4 comprises two symmetrically hinged underframes 41, and the front side and the rear side of the underframe 4 are respectively riveted with the lower transverse pipes 13 of the front wall 1 and the rear wall 2; the handle assembly 6 is arranged on a lower transverse tube 13 of the front wall 1, and a roller 5 is arranged at the bottom of the telescopic tube 12.

After folding, the front wall and the rear wall are close to each other towards the center, and the underframe and the side walls can be folded towards the center to finish folding and storage of the whole handcart.

The hinges in the side walls 3 are connected by hinges 34, the hinges 34 comprising a left 341 and a right 342 connector of symmetrical structure; the left connecting member 341 or the right connecting member 342 includes a circular rivet portion and a square insertion portion, the left connecting member 341 is riveted with the two rivet portions of the right connecting member 342, and the insertion portion is inserted into the long tube 31 or the short tube 32 or the connecting tube 33 and fixed by a fastener such as a screw. The two rivets of each hinge 34 are thus able to rotate relative to each other, thus enabling rotation between the corresponding two tubes.

In a specific embodiment, the bottom frame 41 in the illustrated bottom frame 5 comprises two bottom frame side pipes 41a, a long transverse pipe 41b, a short transverse pipe 41c and bottom frame longitudinal pipes 41d, wherein the two bottom frame longitudinal pipes 41 are symmetrically arranged left and right and narrow from front to back and inwards, the narrow sides of the two bottom frames 41 are hinged, and the wider sides are riveted with the lower transverse pipe 13; a long transverse tube 41b and a short transverse tube 41c which are parallel are arranged between the two chassis longitudinal tubes 41a, the short transverse tube 41c is arranged on the narrowing side, and two ends of the chassis longitudinal tube 41a are fixed with the middle parts of the long transverse tube 41b and the short transverse tube 41 c. The tubes of the bottom frame 41 are fixed and integral.

In the bottom frame 41, a vertical pipe groove member 42 having a downward opening is provided on the narrowed side of each of the two bottom frame side pipes 41a, a connecting portion 42a extending downward is provided on the vertical pipe groove member 42 toward the center side, and the two bottom frames are riveted corresponding to the two connecting portions 42a on the left side or the right side. When folding, the two short transverse pipes 41c in the middle are lifted, the joint of the two bottom frames, namely the riveted joint of the two longitudinal pipe groove-shaped pieces 42, arch upwards, and the two bottom frames are gradually gathered together.

The chassis 4 further comprises four U-shaped chassis fixtures 43, by means of which the surrounding front wall 1, rear wall 2 are connected. Two chassis fixing members 43 are fixed to both ends of the lower cross tube 13 of the front wall 1 or the rear wall 2 toward the center direction, respectively, and the wider sides of the chassis side tube 41a are swaged into the U-shaped openings of the chassis fixing members 43. The whole underframe 4 can drive the narrowing sides of the underframes 41 to rotate upwards by lifting the longitudinal pipe groove-shaped pieces 42 upwards, the lower surfaces of the two underframes 41 are gradually close to each other, and the folding and gathering of the underframe are completed.

Among the rollers, the roller below the front wall 1 adopts universal wheels, and the roller below the rear wall 2 adopts directional wheels.

When the whole folding and storage process is carried out, the middle parts of the two bottom frames 41 move upwards to gather, the long tube 31 and the short tube 32 are gathered, the two cross tubes 32 are gathered, and the two n-shaped brackets 11 connected with the side walls gather towards the middle direction, so that the front wall 1 and the rear wall 2 are gradually close to each other to finish flat folding, the whole frame is finally folded and gathered from the unfolded use state, the occupied space is reduced, and the folding hand trailers are convenient to package and transport in batches.

In a specific embodiment, the handle assembly 6 is further arranged on the front wall 1, the handle assembly 6 comprises a handle 61, a telescopic rod 62 and a pull rod connecting piece 63 which are sequentially arranged from top to bottom, the pull rod connecting piece 63 is rotationally connected with the lower transverse tube 13 of the front wall 1, and the rotation angle is towards or away from the direction of the front wall. The handle 61 is made of plastic.

The handle assembly 6 further comprises a U-shaped member 64 fixed to the front side of the middle of the lower cross tube 13, the U-shaped member 64 is opened toward the front, and the pull rod connecting member 63 is embedded in the U-shaped member 64 for riveting.

In this embodiment, the chassis fixing member 43 and the U-shaped member 64 are both made of metal, and each pipe in the chassis 4 is made of a square pipe made of metal. Each tube in the side wall 3 is an elliptical tube made of metal. The caulking according to the present embodiment is a living caulking.

The flat folding trailer further comprises a trailer cloth bag 7 arranged in the frame structure, the trailer cloth bag 7 has no top surface, four side faces are respectively fixed on an upper cross bar of the front wall or the rear wall through magic tapes, and the side faces are fixed at raised hinging positions in the side walls through mounting openings. Because the frame structure comprises a plurality of tubular components such as chassis side tube, long transverse tube, short transverse tube, chassis longitudinal tube, X-shaped cross tube, telescopic tube, upper transverse tube, lower transverse tube and the like, the gap between the components is larger, large-size articles can be placed, but small articles are easy to separate and fall out in the moving process of the hand trailer, so that the frame structure can be provided with a detachable trailer cloth bag 7 for conveniently placing small articles, and the frame structure is convenient for later use, disassembly and cleaning.

Four sides of the trailer cloth bag 7 are detachably connected with the front wall 1, the rear wall 2 and the two side walls 3 respectively. Specifically, the front wall and the rear wall are fixed by adopting turnover magic tapes and the like, the side wall is sleeved on the riveting part of the two long pipes 31 by adopting a pocket with a lower opening.

Example 2

As shown in fig. 6 to 7, unlike embodiment 1, the side wall 3 of this embodiment is composed of two or more X-shaped cross pipes 30 hinged.

Example 3

As shown in fig. 8 to 9, the positions of the respective tubes in the side wall 3 of this embodiment are different from those of embodiment 1. The specific side wall 3 comprises an X-shaped cross pipe riveted by a long pipe 31 and a short pipe 32 and two connecting pipes 33; the lower ends of the two long pipes 31 are hinged, the upper ends of the long pipes 31 and the lower ends of the short pipes 32 are respectively riveted with the fixed seat 14 and the underframe (specifically, the underframe 41), the upper end of each connecting pipe 33 is hinged with the upper end of the short pipe 32, and the lower end is riveted with the lower section of the long pipe 31.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. The flat folding hand trailer comprises a frame structure composed of a symmetrical front wall, a symmetrical rear wall, two symmetrical side walls and a bottom frame, wherein rollers are arranged at the bottom of the frame structure, and a handle assembly is arranged on the rear wall; the side wall comprises at least two hinged X-shaped cross pipes, and the upper end and the lower end of the front side or the rear side of the side wall are respectively riveted with the fixed seat and the underframe;

the underframe comprises two symmetrically hinged underframes, and the front side and the rear side of the underframe are respectively riveted with the front wall and the lower transverse tube of the rear wall; the handle assembly is rotationally connected with the lower transverse tube of the front wall, and the bottom of the telescopic tube is provided with a roller.

2. The flat-fold hand-truck trailer according to claim 1, wherein the side wall further comprises two connecting pipes, the number of the X-shaped cross pipes is two, and the X-shaped cross pipes are formed by riveting long pipes and short pipes;

the upper end parts of the two long pipes are hinged, the upper end parts of the short pipes and the lower end parts of the long pipes are respectively riveted with the fixed seat and the underframe, the upper end part of each connecting pipe is riveted with the upper section of one long pipe, and the lower end part of each connecting pipe is hinged with the lower end part of the short pipe; or the lower ends of the two long pipes are hinged, the upper ends of the long pipes and the lower ends of the short pipes are respectively riveted with the fixed seat and the underframe, the upper ends of the connecting pipes are hinged with the upper ends of the short pipes, and the lower ends of the connecting pipes are riveted with the lower sections of the long pipes.

3. A flat-fold hand truck according to claim 1 or 2, wherein the hinges in the side walls are connected by hinges comprising structurally symmetrical left and right connectors; the left connecting piece or the right connecting piece comprises a riveting part and an inserting part, the left connecting piece is riveted with the two riveting parts of the right connecting piece, and the inserting part is inserted into the side long pipe or the side short pipe or the cross pipe or the side rod and is fixed.

4. The flat-fold hand-truck trailer according to claim 1 or 2, wherein the bottom frame comprises two bottom frame side pipes, a long transverse pipe, a short transverse pipe and bottom frame longitudinal pipes, the two bottom frame longitudinal pipes are symmetrically arranged left and right and narrow from front to back and inwards, the narrow sides of the two bottom frames are hinged, and the wider sides are riveted with the lower transverse pipe; parallel long transverse pipes and short transverse pipes are arranged between the two chassis longitudinal pipes, the short transverse pipes are arranged on the narrowing sides, and two ends of the chassis longitudinal pipes are fixed with the middle parts of the long transverse pipes and the short transverse pipes.

5. The flat-fold hand-guided vehicle according to claim 4, wherein the two bottom frames are respectively provided with a vertical pipe groove-shaped member with a downward opening at the narrowed sides, the vertical pipe groove-shaped member is provided with a connecting portion extending downward toward the center side, and the two bottom frames are riveted corresponding to the two connecting portions at the left side or the right side.

6. The flat-fold hand truck of claim 4 wherein the chassis further comprises four U-shaped chassis fasteners secured to the left and right inner sides of the lower cross tube, the wider sides of the chassis side tubes being riveted into the U-shaped openings of the chassis fasteners.

7. The flat-fold hand truck according to claim 1 or 2, wherein the handle assembly comprises a handle, a telescopic rod and a pull rod connecting piece which are sequentially arranged from top to bottom, wherein the pull rod connecting piece is rotationally connected with a lower transverse tube of the front wall, and the rotation angle is towards or away from the direction of the front wall.

8. The flat-fold hand truck of claim 7 wherein the pull handle assembly further comprises a U-shaped member secured to the front side of the middle of the lower cross tube, the pull rod connector being riveted embedded in the U-shaped member.

9. The flat-fold hand truck of claim 1 wherein the rollers below the front wall are universal wheels and the rear wall is directional wheels.

10. The flat-fold hand truck of claim 1 further comprising a truck bag disposed in said frame structure.