Large-capacity hand trailer

Abstract

The utility model discloses a large-capacity hand trailer which comprises a fence assembly, a bottom fork supporting assembly, a handle in front of a fence and wheels at the bottoms of the four corners of the fence, and the fence assembly is composed of four four-corner stand column type piston structures, two middle piston structures and six foldable connecting rod subunits. The connecting rod subunit comprises a first inclined rod and a second inclined rod, the first inclined rod and the second inclined rod are riveted through a rotating head, the third inclined rod and the fourth inclined rod are riveted through another rotating head, the first inclined rod and the third inclined rod are riveted through a central hole, and the second inclined rod and the fourth inclined rod are riveted through a central hole. A new folding structure, a new piston support and a new low fork connection mode are adopted, the bearing performance, the containing space and the folding and boxing size of the product are obviously optimized, the size of the trailer can be increased without lengthening pipe fittings, and storage and carrying are convenient.

Description

Technical Field

[0001] The utility model relates to the field of hand trailers, in particular to a large-capacity hand trailer. Background Art

[0002] As outdoor activities become more and more popular and outdoor products become more and more numerous, consumers are increasingly demanding a hand trailer with a larger storage space but a small folding size.

[0003] Traditional hand trailers increase the size of the trailer by continuously adding pipes, resulting in a large folded volume that is inconvenient for storage and transportation.

[0004] For this purpose, we propose a large-capacity hand trailer. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a large-capacity hand trailer, which adopts a new folding structure, a new piston bracket, and a new low-fork connection method. The product's load-bearing capacity, storage space, and folded packing volume are significantly optimized. The trailer size can be increased without the need to extend the pipe fittings, making it easier to store and transport.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A large-capacity hand trailer, comprising a fence assembly, a bottom fork support assembly, a handle at the front of the fence, and wheels at the bottom of the four corners of the fence. The fence assembly is composed of four four-corner column-type piston structures, two intermediate piston structures, and six foldable connecting rod sub-units.

[0008] The connecting rod subunit includes a first oblique rod and a second oblique rod, the first oblique rod and the second oblique rod are riveted through a rotating head, the third oblique rod and the fourth oblique rod are riveted through another rotating head, the first oblique rod and the third oblique rod are riveted through a center hole, and the second oblique rod and the fourth oblique rod are riveted through the center hole.

[0009] Furthermore, the four-corner column piston structure includes an aluminum alloy column rod, and the lower end of the aluminum alloy column rod is fixedly connected to a lower connecting part 1, and the lower connecting part 1 has three connection points, wherein the two connection points for riveting the connecting rod sub-units are in a vertical direction, and the connection points for riveting the bottom fork support tube are respectively at an angle of 45° with the two connecting rod sub-unit connection points. A telescopic connecting plug 1 is inserted into the upper end of the aluminum alloy column rod, and the telescopic connecting plug 1 has a gap in the center, and a telescopic rod 1 is inserted into the gap. The shape of the gap is consistent with the shape of the telescopic rod 1. The upper end of the telescopic rod 1 is fixedly connected to an upper connecting part 1, and the upper connecting part 1 has two connection points, and the two connection points are in a vertical direction.

[0010] Furthermore, the intermediate piston structure includes a column rod, and the lower end of the column rod is fixedly connected to a lower connecting member 2, and the lower connecting member 2 has four connection points, among which the connection points for riveting the connecting rod sub-units are in the horizontal direction, and the two connection points for riveting the bottom fork support tubes are respectively at an angle of 45° to the two connecting rod sub-unit connection points, and the angle between the two bottom fork support tube connection points is 90°. A telescopic connecting plug 2 is inserted into the upper end of the column rod, and there is a gap in the center of the telescopic connecting plug 2, and a telescopic rod 2 is inserted into the gap. The shape of the gap is consistent with the shape of the telescopic rod 2. The upper end of the telescopic rod 2 is fixedly connected to an upper connecting member 2, and the upper connecting member 2 has two connection points, and the two connections are in the horizontal direction.

[0011] Furthermore, the so-called enclosure assembly includes six groups of connecting rod sub-units, and the six groups of connecting rod sub-units are respectively connected to the four four-corner column piston structures and the two intermediate piston structures in pairs, wherein the four end points of one group of connecting rod sub-units are respectively riveted to the upper connecting piece 1 and the lower connecting piece 1 of the two front four-corner column piston structures to form the front wall of the enclosure assembly, wherein the four end points of one group of connecting rod sub-units are respectively riveted to the upper connecting piece 1 and the lower connecting piece 1 of the two rear four-corner column piston structures to form the rear ... The four endpoints are riveted to the upper connecting piece 1 and lower connecting piece 1 of a front four-corner column type piston structure and the upper connecting piece 2 and lower connecting piece 2 of an intermediate piston structure respectively. The four endpoints of another group of connecting rod sub-units are riveted to the upper connecting piece 1 and lower connecting piece 1 of a rear four-corner column type piston structure and the upper connecting piece 2 and lower connecting piece 2 of the above-mentioned intermediate piston structure respectively, forming a group of side walls of the enclosure assembly. The same principle is used to form another group of side walls. The front wall, rear wall and two groups of side walls together form an interconnected whole to form a complete enclosure assembly.

[0012] Furthermore, the bottom fork support assembly includes a bottom fork support tube, a connecting iron fitting is welded to one end of the bottom fork support tube, and the other end of the bottom fork support tube is riveted to a central connecting piece, the central connecting piece has four connecting points, and the angles between the four connecting points are 90°. Four groups of bottom fork support tubes are respectively riveted to the connecting points of the central connecting piece to form a group of bottom fork support assembly.

[0013] Furthermore, one set of bottom fork support assemblies is welded with four end points for connecting iron fittings, which are riveted to the bottom fork connection points at the bottom of the two front four-corner column-type piston structures and the bottom fork connection points at the bottom of the two middle piston structures in the enclosure assembly; another set of bottom fork support assemblies is welded with four end points for connecting iron fittings, which are riveted to the bottom fork connection points at the bottom of the two rear four-corner column-type piston structures and the bottom fork connection points at the bottom of the two middle piston structures in the enclosure assembly.

[0014] Furthermore, the four-corner column-type piston structure at the front of the enclosure assembly is connected to the handle, and the bottoms of the four four-corner column-type piston structures are connected to wheels.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. This utility model adopts a new folding structure, a new piston bracket, and a new low fork connection method. The product's load-bearing capacity, storage space, and folded packing volume are significantly optimized. The trailer size can be increased without the need for additional pipes, making it easier to store and transport.

[0017] 2. The utility model adopts six groups of piston structures, and a foldable connecting rod sub-unit is connected between every two groups of piston structures to form an integrally linked, expandable and foldable enclosure structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0019] Figure 2 is a schematic structural diagram of the foldable connecting rod subunit in this embodiment;

[0020] Figure 3 This is a schematic structural diagram of a four-corner column type piston structure in this embodiment;

[0021] Figure 4 Schematic diagram of the structure of the intermediate piston in this embodiment;

[0022] Figure 5 Schematic diagram of the structure of the bottom fork support assembly in this embodiment.

[0023] In the figure, 1. enclosure assembly; 1011. first diagonal rod; 1012. second diagonal rod; 1013. third diagonal rod; 1014. fourth diagonal rod; 1015. rotating head; 1021. aluminum alloy column rod; 1022. lower connecting piece 1; 1023. telescopic connecting plug 1; 1024. upper connecting piece 1; 1025. telescopic rod 1; 1031. column rod; 1032. lower connecting piece 2; 1033. telescopic connecting plug 2; 1034. upper connecting piece 2; 1035. telescopic rod 2; 2. bottom fork support assembly; 201. bottom fork support tube; 202. connecting iron; 203. center connecting piece; 3. handle; 4. wheel. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings.

[0025] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0026] Reference Figure 1-Figure 2 As shown, a large-capacity hand trailer in a preferred embodiment of the present invention includes an enclosure assembly 1, a bottom fork support assembly 2, a handle 3 at the front of the enclosure, and wheels 4 at the bottom of the four corners of the enclosure. The enclosure assembly 1 is composed of four four-corner column-type piston structures, two intermediate piston structures, and six foldable connecting rod sub-units.

[0027] The connecting rod subunit includes a first diagonal rod 1011 and a second diagonal rod 1012. The first diagonal rod 1011 and the second diagonal rod 1012 are riveted through a rotating head 1015. The third diagonal rod 1013 and the fourth diagonal rod 1014 are riveted through another rotating head 1015. The first diagonal rod 1011 and the third diagonal rod 1013 are riveted through a center hole. The second diagonal rod 1012 and the fourth diagonal rod 1014 are riveted through a center hole.

[0028] It adopts six groups of piston structures, and each two groups of piston structures are connected by a foldable connecting rod sub-unit to form an integrally linked, expandable and foldable enclosure structure.

[0029] Reference Figure 1 and Figure 3 As shown, the four-corner column piston structure includes an aluminum alloy column rod 1021, and the lower end of the aluminum alloy column rod 1021 is fixedly connected to a lower connecting member 1022, and the lower connecting member 1022 has three connection points, of which the two connection points for riveting the connecting rod sub-units are in a vertical direction, and the angles between the connection points for riveting the bottom fork support tube 201 and the two connecting rod sub-unit connection points are 45°, and a telescopic connecting plug 1023 is inserted into the upper end of the aluminum alloy column rod 1021, and there is a gap in the center of the telescopic connecting plug 1023, and a telescopic rod 1025 is inserted into the gap, and the shape of the gap is consistent with the shape of the telescopic rod 1025, and the upper end of the telescopic rod 1025 is fixedly connected to an upper connecting member 1024, and the upper connecting member 1024 has two connection points, and the two connection points are in a vertical direction.

[0030] The shape of the gap is consistent with the shape of the aluminum alloy telescopic rod 1025, so that the aluminum alloy telescopic rod can achieve upward and downward telescopic movement relatively smoothly. The length and width of the aluminum alloy telescopic rod 1025 should be as close as possible to the cross-section of the aluminum alloy column rod 1021 to prevent the formation of an extrusion point or shear cut between the upper connecting piece 1024 and the telescopic connecting plug 1023 when the piston structure moves downward, thereby creating a safety hazard.

[0031] Reference Figure 1 and Figure 4 As shown, the intermediate piston structure includes a column rod 1031, and the lower end of the column rod 1031 is fixedly connected to a lower connecting member 1032, and the lower connecting member 1032 has four connection points, among which the connection points for riveting the connecting rod sub-unit are in a horizontal direction, and the two connection points for riveting the bottom fork support tube 201 are respectively at an angle of 45° to the connection points of the two connecting rod sub-units, and the angle between the connection points of the two bottom fork support tubes 201 is 90°. A telescopic connecting plug 1033 is inserted into the upper end of the column rod 1031, and there is a gap in the center of the telescopic connecting plug 1033. A telescopic rod 1035 is inserted into the gap, and the shape of the gap is consistent with the shape of the telescopic rod 1035. The upper end of the telescopic rod 1035 is fixedly connected to an upper connecting member 1034, and the upper connecting member 1034 has two connection points, and the two connections are in a horizontal direction.

[0032] The shape of the gap is consistent with the shape of the telescopic rod 1035, so that the telescopic rod 1035 can realize the up and down telescopic movement relatively smoothly. The telescopic rod 1035 should be as close as possible to the cross-sectional length and width of the column rod 1031 to prevent the piston structure from moving downward. When an extrusion point or shear opening is formed between the upper connecting piece 1034 and the telescopic connecting plug 1033, it may cause a safety hazard.

[0033] Reference Figures 1-4 As shown, the so-called enclosure assembly 1 includes six groups of connecting rod sub-units, and the six groups of connecting rod sub-units are respectively connected to four square column piston structures and two intermediate piston structures in pairs. The four end points of one group of connecting rod sub-units are respectively riveted to the upper connecting piece 1024 and the lower connecting piece 1022 of the two front square column piston structures to form the front wall of the enclosure assembly 1. The four end points of one group of connecting rod sub-units are respectively riveted to the upper connecting piece 1024 and the lower connecting piece 1022 of the two rear square column piston structures to form the rear wall of the enclosure assembly 1. The four end points of one group of connecting rod sub-units are respectively riveted to one An upper connecting piece 1024 and a lower connecting piece 1022 of a front four-corner column type piston structure and an upper connecting piece 2 1034 and a lower connecting piece 2 1032 of an intermediate piston structure are riveted respectively, and the four end points of another group of connecting rod sub-units are riveted respectively to an upper connecting piece 1024 and a lower connecting piece 1022 of a rear four-corner column type piston structure and an upper connecting piece 2 1034 and a lower connecting piece 2 1032 of the above-mentioned intermediate piston structure to form a group of side walls of the enclosure assembly 1. The same principle is used to form another group of side walls. The front wall, the rear wall and the two groups of side walls together form an interconnected whole to form a complete enclosure assembly 1.

[0034] Reference Figure 1 and Figure 5As shown, the bottom fork support assembly 2 includes a bottom fork support tube 201, one end of the bottom fork support tube 201 is welded with a connecting iron 202, the other end of the bottom fork support tube 201 is riveted to the center connector 203, the center connector 203 has four connection points, and the angles between the four connection points are 90°. Four groups of bottom fork support tubes 201 are respectively riveted to the connection points of the center connector 203 to form a group of bottom fork support assembly 2.

[0035] Reference Figure 1 and Figure 5 As shown, one group of bottom fork support assemblies 2 is welded with four end points for connecting to the iron fittings 202, which are riveted to the bottom fork connection points at the bottom of the two front four-corner column-type piston structures and the bottom fork connection points at the bottom of the two middle piston structures in the enclosure assembly 1 respectively; another group of bottom fork support assemblies 2 is welded with four end points for connecting to the iron fittings 202, which are riveted to the bottom fork connection points at the bottom of the two rear four-corner column-type piston structures and the bottom fork connection points at the bottom of the two middle piston structures in the enclosure assembly 1 respectively.

[0036] Reference Figure 1 As shown, the four-corner column-type piston structure at the front of the enclosure assembly 1 is connected to the handle 3, and the bottoms of the four four-corner column-type piston structures are connected to wheels 4.

[0037] Specific implementation process: The bottom of the two sets of piston structures close to the handle 3 and the bottom of the two sets of piston structures in the middle of the vehicle body are connected to a set of bottom fork structures; the bottom of the two sets of piston structures away from the handle 3 and the bottom of the two sets of piston structures in the middle of the vehicle body are connected to another set of bottom fork structures. The two sets of bottom fork structures and the enclosure structure together support the vehicle body frame of the driver's trailer;

[0038] The vehicle body frame is connected to the tie rod assembly, and the bottom of the four four-corner column-type piston structures of the vehicle body are connected to the wheels 4, thereby forming a complete hand trailer;

[0039] The hand trailer can be folded by pushing the device toward the side close to the handle 3 (pull rod assembly), and can be unfolded by pulling the device toward the side away from the handle 3 (pull rod assembly).

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A large-capacity hand trailer, characterized by: It comprises an enclosure assembly (1), a bottom fork support assembly (2), a handle (3) at the front of the enclosure, and wheels (4) at the bottom of the four corners of the enclosure. The enclosure assembly (1) is composed of four four-corner column-type piston structures, two intermediate piston structures, and six foldable connecting rod sub-units. The connecting rod subunit comprises a first oblique rod (1011) and a second oblique rod (1012); the first oblique rod (1011) and the second oblique rod (1012) are riveted together through a rotating head (1015); the third oblique rod (1013) and the fourth oblique rod (1014) are riveted together through another rotating head (1015); the first oblique rod (1011) and the third oblique rod (1013) are riveted together through a center hole; and the second oblique rod (1012) and the fourth oblique rod (1014) are riveted together through the center hole.

2. A large-capacity hand trailer according to claim 1, characterized in that: The four-corner column type piston structure comprises an aluminum alloy column rod (1021), the lower end of the aluminum alloy column rod (1021) is fixedly connected to a lower connecting piece (1022), the lower connecting piece (1022) has three connection points, wherein the two connection points for riveting the connecting rod sub-units are in a vertical direction, and the angles between the connection points for riveting the bottom fork support tube (201) and the two connecting rod sub-units are both 45 degrees, a telescopic connecting plug (1023) is inserted into the upper end of the aluminum alloy column rod (1021), the center of the telescopic connecting plug (1023) has a gap, and a telescopic rod (1025) is inserted into the gap, the shape of the gap is consistent with the shape of the telescopic rod (1025), the upper end of the telescopic rod (1025) is fixedly connected to an upper connecting piece (1024), the upper connecting piece (1024) has two connection points, and the two connection points are in a vertical direction.

3. A large-capacity hand trailer according to claim 2, characterized in that: The intermediate piston structure comprises a column rod (1031), the lower end of the column rod (1031) is fixedly connected to a lower connecting member 2 (1032), the lower connecting member 2 (1032) has four connection points, wherein the connection points for riveting the connecting rod sub-units are in a horizontal direction, the two connection points for riveting the bottom fork support tube (201) are respectively at an angle of 45° with the connection points of the two connecting rod sub-units, and the angle between the connection points of the two bottom fork support tubes (201) is 90°, a telescopic connecting plug 2 (1033) is inserted into the upper end of the column rod (1031), the center of the telescopic connecting plug 2 (1033) has a gap, and a telescopic rod 2 (1035) is inserted into the gap, the shape of the gap is consistent with the shape of the telescopic rod 2 (1035), the upper end of the telescopic rod 2 (1035) is fixedly connected to an upper connecting member 2 (1034), the upper connecting member 2 (1034) has two connection points, and the two connections are in a horizontal direction.

4. A large-capacity hand trailer according to claim 3, characterized in that: The so-called enclosure assembly (1) includes six groups of connecting rod subunits, and the six groups of connecting rod subunits are respectively connected to four four-corner column piston structures and two intermediate piston structures in pairs, and the four end points of one group of connecting rod subunits are respectively riveted to the upper connecting piece (1024) and the lower connecting piece (1022) of the two front four-corner column piston structures to form the front wall of the enclosure assembly (1), and the four end points of one group of connecting rod subunits are respectively riveted to the upper connecting piece (1024) and the lower connecting piece (1022) of the two rear four-corner column piston structures to form the rear wall of the enclosure assembly (1), and the four end points of one group of connecting rod subunits are respectively riveted to one of the front four The upper connecting piece 1 (1024) and the lower connecting piece 1 (1022) of the corner column type piston structure and the upper connecting piece 2 (1034) and the lower connecting piece 2 (1032) of the intermediate piston structure are riveted respectively, and the four end points of another group of connecting rod sub-units are riveted respectively with the upper connecting piece 1 (1024) and the lower connecting piece 1 (1022) of the rear four corner column type piston structure and the upper connecting piece 2 (1034) and the lower connecting piece 2 (1032) of the intermediate piston structure to form a group of side walls of the enclosure assembly (1). The same principle is used to form another group of side walls. The front wall, the rear wall and the two groups of side walls together form a linked whole to form a complete enclosure assembly (1).

5. The large-capacity hand trailer according to claim 1, characterized in that: The bottom fork support assembly (2) comprises a bottom fork support tube (201), one end of the bottom fork support tube (201) is welded with a connecting iron fitting (202), the other end of the bottom fork support tube (201) is riveted to a central connecting piece (203), the central connecting piece (203) has four connection points, and the angles between the four connection points are 90 degrees. Four groups of bottom fork support tubes (201) are respectively riveted to the connection points of the central connecting piece (203) to form a group of bottom fork support assemblies (2).

6. The large-capacity hand trailer according to claim 5, characterized in that: One set of bottom fork support assemblies (2) is welded with four end points for connecting iron fittings (202), which are riveted to the bottom fork connection points at the bottom of the two front four-corner column type piston structures and the bottom fork connection points at the bottom of the two middle piston structures in the enclosure assembly (1). Another set of bottom fork support assemblies (2) is welded with four end points for connecting iron fittings (202), which are riveted to the bottom fork connection points at the bottom of the two rear four-corner column type piston structures and the bottom fork connection points at the bottom of the two middle piston structures in the enclosure assembly (1).

7. The large-capacity hand trailer according to claim 1, characterized in that: The four-corner column type piston structure at the front of the enclosure assembly (1) is connected to the handle (3), and the bottoms of the four four-corner column type piston structures are connected to wheels (4).

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