Flat folding trolley with suspender

Abstract

The flat folding trolley comprises a trolley frame, the trolley frame comprises a front frame, a rear frame and a frame body defined by two side folding frames and a bottom folding frame, the front end and the rear end of each side folding frame are movably connected with the side face of the front frame and the side face of the rear frame respectively, and the front end and the rear end of the bottom folding frame are movably connected with the lower end of the front frame and the lower end of the rear frame respectively; each side folding frame comprises at least one X-shaped cross pipe, the upper ends of the two vertical pipes in the U-shaped hanging rod are in longitudinal sliding connection with the cross points of the X-shaped cross pipes in the two side folding frames respectively, and a transverse pipe of the U-shaped hanging rod is located below the bottom folding frame. On the basis that the bottom folding frame is connected with the front frame and the rear frame, the hanging rods are additionally arranged to be connected with the side folding frames, the bearing capacity of the bottom folding frame is effectively enhanced, and the using stability of a vehicle is enhanced; the lower end of the side folding frame slides up and down along the vertical pipe through the sliding block, and the hanging rod can slide up and down along the riveting point, so that the whole folded frame does not rise.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolleys, and in particular relates to a flat-folding trolley with a hanging rod. Background Art

[0002] A handcart is a tool used for carrying items over short distances by manpower. A Chinese patent application numbered "CN221794661U" discloses a foldable handcart comprising two main frame assemblies, two side wall cross assemblies, and a bottom folding frame assembly, wherein a fixing member is provided at the bottom of the main frame tube, the bottom folding frame assembly comprises two bottom brackets and two bottom folding frame joint members, and bottom folding frame joint members are provided on both sides of adjacent ends of the two bottom brackets; the two bottom brackets each comprise two bottom support main pipes, two bottom support transverse pipes, and two bottom support vertical pipes, both ends of the two bottom support vertical pipes are fixed with bottom support transverse pipes, both ends of the two bottom support transverse pipes are fixed with bottom support main pipes, and the ends of the two bottom support main pipes on each side that are away from each other are rotatably connected to the fixing member; the two bottom folding frame joint members each comprise two joint iron pieces, the two joint iron pieces are riveted together at one end close to each other, and the ends of the two joint iron pieces that are away from each other are fixed to the bottom support main pipes. The cart with the folding bottom frame assembly connected to the two main frame assemblies only at the front and rear sides completely relies on the front and rear sides to pull the weight of the items, which limits the load-bearing capacity and has relatively poor stability. Summary of the Invention

[0003] The utility model aims to address the defects of the prior art and provides a flat-folding trolley with a suspension rod.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A flat-folding handcart with a boom comprises a frame, wherein the frame comprises a front frame, a rear frame, two side folding frames, and a bottom folding frame, wherein the front and rear ends of the side folding frames are movably connected to the side surfaces of the front frame and the rear frame, respectively, and the front and rear ends of the bottom folding frames are movably connected to the lower ends of the front frame and the rear frame, respectively;

[0006] The side folding frame includes at least one X-cross tube, the upper ends of the two vertical tubes in the U-shaped hanger are respectively longitudinally slidably connected to the intersections of the X-cross tubes in the two side folding frames, and the horizontal tube of the U-shaped hanger is located below the bottom folding frame.

[0007] Furthermore, a longitudinal strip groove is provided at the upper end of the U-shaped hanger, and a rivet passes through the longitudinal strip groove and the intersection of the X-cross tube to form a movable connection.

[0008] Furthermore, a sliding plate is inserted into the upper end of the vertical tube of the U-shaped hanger, and a longitudinal sliding groove is opened on the sliding plate. The lower rivet passes through the longitudinal sliding groove and the upper end of the vertical tube to form a movable connection, and the upper rivet passes through the upper end of the sliding plate and the intersection of the X-cross tube to form a movable connection.

[0009] Furthermore, the front frame includes two vertical tubes, the upper and lower ends of the two vertical tubes are respectively connected by an upper transverse tube and a lower transverse tube, the upper end of the X-cross tube on the front side of the side folding frame is movably riveted to the upper end of the vertical tube, and the upper end of the X-cross tube on the front side of the side folding frame is movably riveted to the slider, and the slider slides up and down along the vertical tube; the rear frame has the same structure as the front frame, and a roller is provided at the bottom of the vertical tube.

[0010] Furthermore, the roller is detachably mounted on the bottom of the riser.

[0011] Furthermore, it also includes a locking piece installed in the vertical pipe, the locking piece is provided with an annular groove, and the pressing portion of the locking piece passes through the limiting hole on the vertical pipe wall; a limiting shaft is provided on the top of the roller frame of the roller, and a limiting protrusion is provided on the top of the limiting shaft. The limiting shaft extends axially along the bottom of the vertical pipe, and the limiting protrusion is engaged in the annular groove.

[0012] Furthermore, the rollers of the front frame are universal wheels, and the rollers of the rear frame are fixed wheels.

[0013] Furthermore, a pull rod is movably riveted on the lower transverse tube of the front frame, and the pull rod can rotate forward and backward around the riveted point.

[0014] Furthermore, the pull rod includes a telescopic rod and a handle on the top of the telescopic rod.

[0015] Furthermore, the bottom folding frame includes two bottom frames whose inner ends are movably riveted, and the outer ends of the two bottom frames are movably riveted to the lower ends of the front frame and the rear frame respectively.

[0016] The technical solution of the present invention is adopted, and the beneficial effects of the present invention are as follows: on the basis of connecting the bottom folding frame with the front frame and the rear frame, the two side folding frames are connected by adding a U-shaped hanger, so that the load-bearing capacity of the bottom folding frame is enhanced and the stability of the vehicle is enhanced; the lower end of the side folding frame slides up and down along the vertical pipe through the slider, and the U-shaped hanger can also slide up and down along the riveted point, so that the entire frame does not rise when folded; the bottom folding frame and the side frames both adopt a folding structure, and the entire trolley can be folded and stored to reduce space occupancy, and it comes with a retractable pull rod, which is convenient and quick to push and pull; rollers that can be quickly disassembled and assembled can be used, and installation and replacement are very convenient; the front frame rollers adopt universal wheels, which are convenient for more rapid adjustment of direction during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the flat-folding trolley with a boom in Example 1;

[0018] Figure 2 is a side view of the flat-folding trolley with a boom in Example 1;

[0019] Figure 3 This is a schematic diagram of the assembly of the riser and roller quick-release structure;

[0020] Figure 4 is a perspective view of the flat-folding trolley with a boom in Example 1;

[0021] Figure 5 It is a perspective view of the flat-folding trolley with a boom in Example 2.

[0022] In the figure: 1 front frame, 11 vertical tube, 11a limiting hole, 12 upper transverse tube, 13 lower transverse tube, 14 slider, 2 rear frame, 3 side folding frame, 31X cross tube, 31a intersection, 4 bottom folding frame, 41 bottom frame, 5 U-shaped suspension rod, 51 vertical tube, 52 transverse tube, 53 longitudinal strip groove, 6 roller, 61 roller frame, 62 limiting shaft, 62a limiting protrusion, 63 shaft sleeve, 7 locking piece, 71 annular groove, 72 pressing part, 8 pull rod, 81 telescopic rod, 82 handle; 9 sliding piece, 91 longitudinal slide groove. DETAILED DESCRIPTION

[0023] The specific embodiments of the present invention are further described in conjunction with the accompanying drawings to make the present technical solution clearer and more understandable.

[0024] Example 1

[0025] like Figure 1-Figure 3 The flat-folding handcart with a hanger shown in the figure includes a frame, which includes a front frame 1, a rear frame 2, two side folding frames 3, and a bottom folding frame 4. The front and rear ends of the side folding frames 3 are movably connected to the sides of the front frame 1 and the rear frame 2, respectively, and the front and rear ends of the bottom folding frame 4 are movably connected to the lower ends of the front frame 1 and the rear frame 2, respectively; the side folding frames 3 include at least one X-cross tube 31, which is formed by movably riveting two tubes, and the upper ends of the two vertical tubes 51 in the U-shaped hanger 5 are longitudinally slidably connected to the intersection 31a of the X-cross tubes 31 in the two side folding frames, respectively, and the horizontal tube 52 of the U-shaped hanger 5 is located below the bottom folding frame 4.

[0026] Specifically, a longitudinal strip groove 53 is provided at the upper end of the U-shaped suspension rod 5 , and a rivet passes through the longitudinal strip groove 53 and the intersection 31 a of the X-cross tube to form a movable connection.

[0027] The front frame 1 includes two vertical tubes 11, the upper and lower ends of the two vertical tubes 11 are connected by an upper transverse tube 12 and a lower transverse tube 13 respectively, the upper end of the X-cross tube on the front side of the side folding frame 3 is movably riveted to the upper end of the vertical tube 11, and the upper end of the X-cross tube on the front side of the side folding frame 3 is movably riveted to the slider 14, and the slider 14 slides up and down along the vertical tube 11; the rear frame 2 has the same structure as the front frame 1, and a roller 6 is provided at the bottom of the vertical tube 11.

[0028] The roller 6 is detachably mounted on the bottom of the riser 11. Specifically, a locking member 7 and a sleeve 63 are provided within the riser 11. The locking member 7 has an annular groove 71. A pressing portion 72 of the locking member 7 extends through a radially extending through-hole through the sleeve 63 and a stopper hole 11a in the wall of the riser 11. A stopper shaft 62 is provided at the top of the roller frame 61 of the roller 6. A stopper protrusion 62a is provided at the top of the stopper shaft 62. A sleeve 63 is provided around the stopper shaft 62, which extends axially along the bottom of the riser 11. The stopper protrusion 62a engages the annular groove 71 at the through-hole of the sleeve 63, locking the stopper. To disassemble the roller, the user presses the pressing portion 72, causing the entire locking member 7 to move radially. The annular groove 71 disengages from the stopper protrusion 62a, releasing the lock. Pulling the roller 6 downward disengages the roller frame 61 and the stopper shaft 62 from the riser 11, enabling quick removal and installation of the roller.

[0029] The shaft sleeve 63 of this embodiment has a positioning protrusion at the lower end, which is adapted to the positioning groove at the lower end of the vertical pipe 11. When assembling from the bottom of the vertical pipe 11 upward, the positioning protrusion gradually fits into the positioning groove and is fixed by fasteners such as screws.

[0030] In order to facilitate the adjustment of the direction, the rollers of the front frame 1 are universal wheels, and the rollers of the rear frame 2 are fixed wheels.

[0031] A pull rod 8 is movably riveted on the lower transverse tube of the front frame 11, and the pull rod 8 can rotate forward and backward around the riveted point. The pull rod includes a telescopic rod 81 and a handle 82 at the top of the telescopic rod.

[0032] The bottom folding frame 4 includes two bottom frames 41 with inner ends movably riveted, and the outer ends of the two bottom frames 41 are movably riveted to the lower ends of the front frame 1 and the rear frame 2. Specifically, the left and right sides of the bottom frame 41 are movably riveted to two U-shaped pieces fixed on the lower cross tube 13.

[0033] Example 2

[0034] Different from Example 1, Figure 4As shown, in the flat-folding trolley with a boom of this embodiment, the longitudinal sliding connection between the upper end of the vertical tube 51 and the intersection 31a is specifically achieved by inserting a sliding plate 9 into the upper end of the vertical tube of the U-shaped boom 5. The sliding plate 9 has a longitudinal slot 91 formed therein. A lower rivet passes through the longitudinal slot 91 and forms a movable connection with the upper end of the vertical tube 11. An upper rivet passes through the upper end of the sliding plate 9 and forms a movable connection with the intersection 31a of the X-shaped cross tube 31. When folding, the X-shaped cross tubes converge, and the slider 14 slides down, driving the sliding plate 9 to slide down and into the vertical tube 51 of the U-shaped boom.

[0035] Example 3

[0036] Different from Example 2, Figure 5 As shown, in the flat-folding trolley with a boom of this embodiment, the rollers 6 are fixedly installed. The rollers on the front frame 1 are fixed to the lower transverse tube by direct welding or the like, and the rollers on the rear frame are directly installed on the vertical tube.

[0037] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A flat-folding trolley with a boom, characterized in that: The vehicle frame includes a front frame, a rear frame, two side folding frames, and a bottom folding frame, wherein the front and rear ends of the side folding frames are movably connected to the sides of the front frame and the rear frame, and the front and rear ends of the bottom folding frames are movably connected to the lower ends of the front frame and the rear frame; The side folding frame includes at least one X-cross tube, the upper ends of the two vertical tubes in the U-shaped hanger are movably connected to the intersections of the X-cross tubes in the two side folding frames, and the horizontal tube of the U-shaped hanger is located below the bottom folding frame.

2. The flat-folding trolley with a boom according to claim 1, characterized in that: The upper end of the U-shaped suspension rod is provided with a longitudinal strip groove, and the rivet passes through the longitudinal strip groove and the intersection of the X-cross tube to form a movable connection.

3. The flat-folding trolley with a boom according to claim 1, characterized in that: A sliding plate is inserted into the upper end of the vertical tube of the U-shaped hanger, and a longitudinal sliding groove is opened on the sliding plate. The lower rivet passes through the longitudinal sliding groove and the upper end of the vertical tube to form a movable connection, and the upper rivet passes through the upper end of the sliding plate and the intersection of the X-cross tube to form a movable connection.

4. The flat-folding trolley with a boom according to claim 1, characterized in that: The front frame includes two vertical tubes, the upper and lower ends of the two vertical tubes are respectively connected by an upper transverse tube and a lower transverse tube, the upper end of the X-cross tube on the front side of the side folding frame is movably riveted to the upper end of the vertical tube, and the upper end of the X-cross tube on the front side of the side folding frame is movably riveted to the slider, and the slider slides up and down along the vertical tube; the rear frame has the same structure as the front frame, and rollers are provided at the bottom of the vertical tube.

5. The flat-folding trolley with a boom according to claim 4, characterized in that: The roller is detachably mounted on the bottom of the vertical pipe.

6. The flat-folding trolley with a boom according to claim 5, characterized in that: It also includes a locking piece installed in the vertical pipe, with an annular groove on the locking piece, and the pressing part of the locking piece passes through the limiting hole on the wall of the vertical pipe; a limiting shaft is provided on the top of the roller frame of the roller, and a limiting protrusion is provided on the top of the limiting shaft. The limiting shaft extends axially along the bottom of the vertical pipe, and the limiting protrusion is locked in the annular groove.

7. The flat-folding trolley with a boom according to claim 4, characterized in that: The rollers of the front frame are universal wheels, and the rollers of the rear frame are fixed wheels.

8. The flat-folding trolley with a boom according to claim 4, characterized in that: A pull rod is movably riveted on the lower transverse tube of the front frame, and the pull rod can rotate forward and backward around the riveted point.

9. The flat-folding trolley with a boom according to claim 8, characterized in that: The pull rod comprises a telescopic rod and a handle on the top of the telescopic rod.

10. The flat-folding trolley with a boom according to claim 1, characterized in that: The bottom folding frame comprises two bottom frames whose inner ends are movably riveted, and whose outer ends are movably riveted to the lower ends of the front frame and the rear frame respectively.

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