CN211710856U

CN211710856U - Multifunctional folding handcart

Info

Publication number: CN211710856U
Application number: CN201921840205.5U
Authority: CN
Inventors: 孙本龙
Original assignee: Zhejiang Pride Leisure Products Co Ltd
Current assignee: Zhejiang Pride Leisure Products Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-10-20
Anticipated expiration: 2029-10-30

Abstract

A multifunctional folding handcart comprises a frame, a front frame, two side walls and a rear frame, wherein the frame consists of a front wall, two side walls and a rear wall; the front wall and the rear wall are formed by a frame consisting of connecting rods, and the two side walls are formed by a scissor type connecting rod assembly; the mechanism is connected with the upper part of the rear side of the rear wall frame; and an axle mechanism provided at a lower portion of a rear side of the rear wall frame, the axle mechanism having two tires mounted on both sides thereof for quick mounting and dismounting, respectively. The utility model provides a multifunctional folding handcart suitable for various occasions and two-wheeled folding.

Description

Multifunctional folding handcart

Technical Field

The utility model belongs to the technical field of the handcart technique and specifically relates to a multi-functional handcart of folding up is related to.

Background

After the existing four-wheel folding trolley is unfolded, the area is large, the steering radius is large, push-pull is not changed in places with dense pedestrian flows, the height of a container is short, parts with large lengths cannot be vertically placed, and the parts cannot be conveniently lifted and placed when heavy goods are encountered. The two-wheeled truck can solve these problems, but the number of the small-piece goods to be transferred is small.

Disclosure of Invention

In order to overcome the defects of the prior handcart, the utility model provides a multifunctional folding handcart which is suitable for various occasions and two wheels.

The utility model provides a technical scheme that its technical problem adopted is:

a multi-functional foldable trolley, comprising:

a frame, the frame comprising a front wall, two side walls and a rear wall; the front wall and the rear wall are formed by a frame consisting of connecting rods, and the two side walls are formed by a scissor type connecting rod assembly;

the lower ends of the scissors-type connecting rod assemblies of the two side walls are respectively connected to the lower parts of the frames of the front wall and the rear wall, the upper ends of the scissors-type connecting rod assemblies of the two side walls are respectively connected to the upper parts of the frames of the front wall and the rear wall, and the upper ends of the scissors-type connecting rod assemblies of the two side walls slide along the frames of the front wall and the rear wall when the frame is folded and unfolded, so that the distance between the front wall and the rear wall;

the turnover support plate mechanism is connected to the lower part of the front side of the front wall frame and limits the turnover angle by using the front wall frame;

the mechanism is connected with the upper part of the rear side of the rear wall frame; and a wheel axle mechanism at the lower part of the rear side of the rear wall frame, two tires which can be assembled and disassembled rapidly are respectively arranged at the two sides of the wheel axle mechanism;

a flexible liner is secured to the frame and forms an open-topped interior cargo bed within the cart frame when the cart is in the unfolded position, and a platform is disposed on the bottom of the cargo bed.

Further, the front walls are firmly connected by a bar system to form a rectangular frame structure.

The back wall is firmly connected into an H-shaped frame structure by a rod system.

The scissors type connecting rod assembly of the side wall is composed of a group of crossed X-shaped rods, the lower end of one rod of each X-shaped rod is connected to the lower part of the front wall frame, and the upper end of the X-shaped rod is connected to the upper part of the rear wall frame; the lower end of the other rod is connected with the lower part of the rear wall frame, and the upper end of the other rod is connected with the upper part of the front wall frame; the upper ends of the scissors-type connecting rod assemblies of the two side walls slide up and down along the frames of the front wall and the rear wall when the frame is folded and unfolded.

The front wall is an inverted U-shaped supporting plate connecting pipe, the rear wall is composed of two vertical pipes and a handle pipe, the side wall comprises two groups of cross pipes and two right-angled slide blocks, the two groups of cross pipes are arranged in bilateral symmetry, the front end and the rear end of one cross pipe in each group of cross pipes are respectively hinged with a straight slide block, the straight slide block positioned on the front side is sleeved on the vertical pipe on the corresponding side of the inverted U-shaped supporting plate connecting pipe and forms an upper slide block pair and a lower slide block pair with the vertical pipe, a limiting sleeve is further fixedly arranged on the vertical pipe of the inverted U-shaped supporting plate connecting pipe, the limiting sleeve is arranged below the straight slide block on the front side, and the straight slide block positioned on the rear side is sleeved on the vertical pipe on the corresponding; the front end and the rear end of the other cross pipe are respectively hinged with a bent sliding block and a right-angled bent sliding block, the bent sliding blocks are fixedly arranged on the vertical pipe on one corresponding side of the inverted U-shaped supporting plate connecting pipe and located below the limiting sleeve, the right-angled bent sliding blocks can be arranged on the vertical pipe on one corresponding side in a vertically sliding mode and arranged above the straight sliding blocks on the rear side, the two right-angled bent sliding blocks are connected through a lifting handle pipe, and the upper portions of the two vertical pipes are connected through a connecting pipe.

Still further, the layer board mechanism is laid on the rod system by the flat board, connects in the front side lower part of preceding wall frame through articulated connection to can overturn to and be parallel to and perpendicular state with preceding wall frame.

The layer board mechanism includes that an opening is towards the U type underframe of folding up the mechanism, three end violently pipes, a plastic slab and two sets of L type iron sheets, the middle part of U type underframe is fixed with two end violently pipes that are used for supporting the plastic slab, it has the plastic slab to cover it, every group L type iron sheet contains two L type iron sheets, one side of two sets of L type iron sheets presss from both sides tightly respectively and fixes on two ends on the left and right sides of U type underframe, the another side of two sets of L type iron sheets presss from both sides tightly respectively and connects on two ends about the type of falling U layer board connecting pipe through the rivet riveting, make layer board mechanism around the rotatory 90 back of rivet axis two ends of U type underframe 3 top can not move on the arc surface of layer board connecting pipe, horizontal union coupling is located two inboard L type iron sheets at the bottom of third root.

And the cart mechanism is formed by connecting a rotary locking mechanism fixed on the upper part of the rear side of the rear wall frame with the handrail tube, and the rotary locking mechanism is used for connecting and disconnecting the two limiting seats by pushing the limiting slide blocks in the two limiting seats to play roles of locking and releasing rotation.

The handrail rotation locking structure comprises a limiting seat, a limiting sliding block, a spring, a key seat and a key for pushing the limiting sliding block to move, wherein the limiting seat and the key seat are fixed through rivets, the limiting sliding block and the spring are arranged in a cavity formed by buckling the limiting seat and the key seat, the limiting sliding block is annular, the limiting seat and the key seat are provided with wave-shaped grooves with the same size on inner circumferential folds of a buckling cavity, the outer wall of the circumference of the limiting sliding block is provided with wave-shaped protrusions meshed with the wave-shaped grooves, and the thickness of the limiting sliding block is slightly smaller than the depth of the buckling cavity of the limiting seat and far larger than the depth of the buckling cavity of the key seat; the limiting sliding block and the spring are sleeved outside the rivet, one end of the spring is connected with the limiting seat, and the other end of the spring is connected with the limiting sliding block;

the key is arranged on the key seat, four claws are arranged on the key and correspond to four holes on the key seat, the four holes on the key seat are communicated with the cavity, and the four claws on the key penetrate through the four holes on the key seat and then abut against the limiting sliding block;

the limiting seat is provided with a sleeve connected with the U-shaped handrail tube, and the key seat is provided with a sleeve connected with the upper end of the vertical tube.

Still further, the wheel axle mechanism is composed of a wheel axle tube fixed at the lower part of the rear side of the rear wall frame and a limit wheel axle inserted into the axle tube and sleeved with a tire; the wheel shaft can be quickly assembled and disassembled by the aid of holes in the wheel shaft tube through the telescopic bosses.

The wheel shaft mechanism comprises two tires, two limiting wheel shafts, two elastic buckles, two plastic wheel shaft connecting sleeves and a wheel shaft pipe, wherein each plastic wheel shaft connecting sleeve consists of a transverse pipe and a vertical pipe which are perpendicular to each other; one end of the flanging of each limiting wheel shaft is assembled with the central hole of the tire on the corresponding side, and the other end of the flanging is connected with the wheel shaft tube in a quick-release manner through a snap fastener.

Further, the flat plate at the bottom of the cargo box can be separated from the cargo box and has the same size as the bottom of the cargo box.

The beneficial effects of the utility model are that: not only can be folded, but also can load and stack bulky cargos such as steel cylinders, iron drums, boxes and the like to a two-wheel loading and unloading vehicle after being opened, and also can load small and scattered cargos like a four-wheel trolley; and can realize the use in various road conditions and places through changing the type of tire, for example: garbage carts, shopping carts, luggage carts, carriers, and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view showing the open state of the vehicle body frame.

Fig. 3 is a semi-folding state diagram of the bicycle frame.

Fig. 4 is a fully folded state diagram of the bicycle frame.

Fig. 5 is a side view of the vehicle frame.

Fig. 6 is a rear view of the vehicle frame.

Fig. 7 is a front view of the frame.

FIG. 8 is a top view of the vehicle frame.

Fig. 9 is a bottom view of the frame.

Fig. 10 is a schematic view of the frame structure.

Fig. 11 is an exploded view of the pallet mechanism.

Fig. 12 is a schematic view of a folding mechanism.

Fig. 13 is an exploded view of the armrest mechanism.

Figure 14 is an exploded view of the axle mechanism.

Fig. 15 is an exploded view of the armrest rotation locking structure.

Fig. 16 is an outside view of the right key base.

FIG. 17 is an inside view of the right bump stop.

Fig. 18 is a state diagram of fig. 15 when the key is not pressed.

Fig. 19 is a sectional view a-a in fig. 18.

Fig. 20 is a state diagram of fig. 15 when a key is pressed.

Fig. 21 is a sectional view taken along line B-B of fig. 20.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 21, a multifunctional folding handcart is composed of a supporting plate mechanism a, a folding mechanism B, a handcart mechanism C and a wheel axle mechanism D, which are specifically shown in fig. 10. The folding mechanism B is a main body, and the supporting plate mechanism A, the car pushing mechanism C and the wheel shaft mechanism D are all supported on the folding mechanism B. The pallet mechanism A is used for stacking boxes or articles which are inconvenient to load and unload. The folding mechanism B is provided with cloth or other structures capable of enclosing into a carriage, and the carriage is opened and folded through the folding mechanism B. The trolley mechanism C is used for pushing and pulling the trolley. And the wheel shaft mechanism D is used for driving the trolley to move.

The folding mechanism B is made of two bent sliders 5, four crossed tubes 6, four limiting sleeves 7, four straight sliders 8, an inverted U-shaped supporting plate connecting tube 9, a connecting tube 10, two stand tubes 11, two right-angled bent sliders 12 and a handle tube 13, as shown in figure 12. Four cross pipes 6 form two groups of cross structures, the front end and the rear end of one cross pipe 6 in each group of cross structures are respectively riveted with a straight slide block 8, the front end of the other cross pipe 6 is riveted with a bent slide block 5, and the rear end of the other cross pipe 6 is riveted with a right-angled bent slide block 12. Wherein, the lower part of one cross pipe 6 in the cross structure is riveted with a bent slide block 5 which is fixed on the vertical pipe of the inverted U-shaped supporting plate connecting pipe 9, and the upper part is riveted with a right-angled bent slide block 12 which is sleeved on the vertical pipe 11; the lower part of the other cross pipe 6 is riveted with a straight sliding block 8 which is fixed on the vertical pipe 11 at the same side, and the upper part of the straight sliding block 8 is riveted on the vertical pipe at the same side of the inverted U-shaped supporting plate connecting pipe 9. In order to limit the opening length, a stop collar 7 is respectively fixed on two vertical pipes of the inverted U-shaped supporting plate connecting pipe 9 and two vertical pipes 11. The connecting tube 10 is secured between two vertical tubes 11 and the handle tube 13 connects the two quarter turn sliders 12 together. The folding mechanism is provided with a flexible lining.

The supporting plate mechanism A consists of four L-shaped iron sheets 1, three bottom transverse pipes 2, a U-shaped bottom frame 3 and a plastic plate 4, and is shown in figure 11. Two bottom horizontal pipes for supporting the plastic plate 4 are fixed in the middle of the U-shaped bottom frame 3, and the plastic plate 4 is covered on the bottom horizontal pipes. One side of each of the four L-shaped iron sheets 1 is clamped and fixed at two ends of the U-shaped bottom frame 3, and the other side of each of the four L-shaped iron sheets 1 is clamped and riveted at two ends of the inverted U-shaped supporting plate connecting pipe 9. The third bottom horizontal tube is connected with two L-shaped iron sheets positioned at the inner side. After the supporting plate mechanism A rotates by 90 degrees around the axis of the rivet, two ends of the U-shaped bottom frame 3 are propped against the arc surface of the inverted U-shaped supporting plate connecting pipe 9 and cannot move.

The cart mechanism C is composed of two keys 14, a pair of key seats which are symmetrical to each other, two limit sliders 16, two springs 17, a pair of limit seats which are symmetrical to each other, two rivets 19, and a U-shaped handrail tube 20, as shown in fig. 13. The key bases are respectively a right key base 15 and a left key base 22, the limiting bases are respectively a right limiting base 18 and a left limiting base 21, a limiting slide block 16 and a spring 17 are arranged in a cavity formed by buckling the right limiting base 18 and the right key base 15 and are fixed through a rivet 19. And a key 14 which can push a limit slider 16 to move is arranged outside the right key seat 15 and passes through four holes on the right key seat, and the key 14 is shown in figure 15. Because the right limit seat 18 and the right key seat 15 have the same size wave-shaped grooves on the inner circumferential wall of the buckling cavity, and the outer circumferential wall of the limit slider 16 also has the wave-shaped protrusions engaged with the grooves, the thickness of the limit slider 16 is slightly smaller than the buckling cavity depth of the right limit seat 18 and is far larger than the buckling cavity depth of the right key seat 15. When the push button 14 is not pushed down, the limit slider 16 is pressed against the engaging inner wall of the right push button holder 15 under the force of the spring 17, see fig. 18. When the wave-shaped protrusion on the circumferential outer wall of the limiting slide block 16 is meshed with the wave-shaped groove on the circumferential inner wall of the right key seat 15, the wave-shaped protrusion is also meshed with the wave-shaped groove on the circumferential inner wall of the right limiting seat 18, so that the right limiting seat 18 and the right key seat 15 cannot rotate. When the key 14 is pressed, as shown in fig. 20, the four claws of the key penetrate through the holes on the buckling inner wall of the right key base 15 to push the limiting slide block 16 to compress the spring 17 to slide into the depth of the cavity of the right limiting base 18, so that the limiting slide block is separated from the groove of the right key base 15, and the restriction is removed to enable the right limiting base 18 and the right key base 15 to rotate freely. The right limiting seat 18 and the left limiting seat 21 which are fastened are respectively fixed at two ends of the U-shaped handrail tube 20, and the right key seat 15 and the left key seat 22 are fixed at the upper ends of the two vertical tubes 11.

The wheel axle mechanism D is composed of two limit wheel axles 24, two snap fasteners 25, two plastic wheel axle connecting sleeves 26 and a wheel axle tube 27, see fig. 14. The plastic wheel axle connecting sleeve 26 is composed of a horizontal pipe and a vertical pipe which are perpendicular to each other, the horizontal pipe is sleeved and fixed at two ends of the wheel axle pipe 27, and the vertical pipe is sleeved and fixed at the lower end of the vertical pipe 11. One end of the limit wheel shaft 24 is a flanging used for blocking the tire 23, and the round surface of the other end is provided with a hole used for installing the elastic buckle 25. The limit wheel shaft 24 is turned outwards and inserted into the central hole of the tire 23, and the elastic buckle 25 is arranged in the pipe to form the quick-release tire assembly. The quick release tire assembly is inserted into the axle tube 27 so that the inner side of the tire 23 is against the end face of the horizontal tube of the plastic axle connecting sleeve 26. At this time, the elastic buckle head on the elastic buckle 25 in the limiting wheel shaft 24 is just clamped into the hole on the wheel shaft tube 27, so that the limiting wheel shaft 24 cannot move, and the tire 23 on the limiting wheel shaft can only rotate but cannot move axially.

The utility model discloses a theory of operation does:

when the folding device is folded, the handle pipe 13 is held by hands to be lifted upwards, and the right-angled bent sliding blocks 12 connected with the two ends of the handle pipe 13 move upwards along the vertical pipe 11, so that the cross pipe 6 riveted on the vertical pipe is driven to move upwards together. Because the right-angle bent slide block 12 riveted at the other end of the cross pipe 6 is fixed on the inverted U-shaped supporting plate connecting pipe 9; the straight sliding block 8 riveted with the other cross pipe 6 hinged with the cross pipe 6 is fixed on the vertical pipe 11 and slides on the inverted U-shaped supporting plate connecting pipe 9. At this time, the straight sliding block 8 riveted with the other cross pipe 6 also moves upwards, so that the inverted U-shaped supporting plate connecting pipe 9 is pulled to approach the vertical pipe 11 until the collision is stopped. At this time, the folding mechanism B is folded, as shown in fig. 3. The bottom frame 3 is lifted upwards to make the L-shaped iron sheet 1 fixed thereon rotate around the rivet shaft riveted on the inverted U-shaped supporting plate connecting pipe 9, thereby driving all the parts fixed thereon to rotate together, and making the bottom frame 3 parallel to the inverted U-shaped supporting plate connecting pipe 9 to complete the folding of the supporting plate mechanism A, as shown in figure 4. The left and right keys 14 are pressed by both hands simultaneously, so that the left and right keys push the limiting slide blocks 16 in the right key base 15 and the left key base 22 to move inwards, the springs 17 are compressed, the limiting slide blocks 16 slide into the right limiting base 18 and the left limiting base 21 along the wave-shaped grooves, and the locking is released by separating from the wave-shaped grooves in the right key base 15 and the left key base 22. Meanwhile, the handrail tube 20 is pressed downwards, the rotation is carried out to the lowest point, the key 14 is released to recover the locking state, and the folding of the handrail is completed, as shown in figure 4. When necessary, the elastic buckle head on the axle tube 27 can be pressed down to retract the elastic buckle 25 into the limit axle 24, and simultaneously the tire 23 is pulled outwards to drive the limit axle 24 and the elastic buckle 25 to be pulled out from the axle tube 27 together, so that the placing space is reduced.

When the lifting handle is opened, the handle pipe 13 is held by a hand to be pressed downwards, so that the right-angled bent sliding blocks 12 connected with the two ends of the lifting handle move downwards along the vertical pipe 11 together to drive the crossed pipe to be unfolded outwards so as to push the inverted U-shaped supporting plate connecting pipe 9 to be unfolded outwards in a translation way, and the supporting plate mechanism A on the supporting plate mechanism A moves together until the supporting plate mechanism A is pushed to the limiting sleeve 7, and the lifting handle is stopped as shown in figure 2. The lower frame 3 is pulled, the supporting plate mechanism A rotates to the position vertical to the inverted U-shaped supporting plate connecting pipe 9, so that two ends of the U-shaped lower frame 3 are propped against the arc surface of the inverted U-shaped supporting plate connecting pipe 9 and can not rotate continuously, and the figure 2 is shown. Meanwhile, the left and right buttons 14 are pressed down, the handrail tube 20 is pulled to rotate to a required position, the buttons 14 are released to restore the locking state, and the handrail angle adjustment is completed, as shown in fig. 2.

Claims

1. Multifunctional folding handcart, its characterized in that: the cart includes:

a frame, the frame comprising a front wall, two side walls and a rear wall; the front wall and the rear wall are formed by a frame consisting of connecting rods, and the two side walls are formed by a scissor type connecting rod assembly; the lower ends of the scissors-type connecting rod assemblies of the two side walls are respectively connected to the lower parts of the frames of the front wall and the rear wall, the upper ends of the scissors-type connecting rod assemblies of the two side walls are respectively connected to the upper parts of the frames of the front wall and the rear wall, and the upper ends of the scissors-type connecting rod assemblies of the two side walls slide along the frames of the front wall and the rear wall when the frame is folded and unfolded, so that the distance between the front wall and the rear wall;

a reversible pallet mechanism connected to a lower portion of a front side of the front wall frame and limiting a turning angle by the front wall frame;

an angle-adjustable car pusher mechanism connected to an upper portion of a rear side of the rear wall frame; and a wheel axle mechanism at the lower part of the rear side of the rear wall frame, two tires which can be assembled and disassembled rapidly are respectively arranged at the two sides of the wheel axle mechanism;

2. The multi-functional foldable cart of claim 1, further comprising: the front walls are firmly connected by a bar system to form a rectangular frame structure.

3. The multi-functional foldable trolley according to claim 1 or 2, further comprising: the back wall is firmly connected into an H-shaped frame structure by a rod system.

4. The multi-functional foldable trolley according to claim 1 or 2, further comprising: the scissors type connecting rod assembly of the side wall is composed of a group of crossed X-shaped rods, the lower end of one rod of each X-shaped rod is connected to the lower part of the front wall frame, and the upper end of the X-shaped rod is connected to the upper part of the rear wall frame; the lower end of the other rod is connected with the lower part of the rear wall frame, and the upper end of the other rod is connected with the upper part of the front wall frame; the upper ends of the scissors-type connecting rod assemblies of the two side walls slide up and down along the frames of the front wall and the rear wall when the frame is folded and unfolded.

5. The multi-functional foldable trolley according to claim 1 or 2, further comprising: the supporting plate mechanism is laid on the rod system by a flat plate, is connected to the lower part of the front side of the front wall frame through a hinge, and can be turned over to be parallel and vertical to the front wall frame.

6. The multi-functional foldable trolley according to claim 1 or 2, further comprising: the cart mechanism is formed by connecting a rotary locking mechanism fixed on the upper part of the rear side of the rear wall frame with the handrail tube, and the rotary locking mechanism is used for connecting and disconnecting two limiting seats by pushing limiting sliding blocks in the two limiting seats to play roles in locking and releasing rotation.

7. The multi-functional foldable trolley according to claim 1 or 2, further comprising: the wheel shaft mechanism consists of a wheel shaft pipe fixed at the lower part of the rear side of the rear wall frame and a limit wheel shaft inserted into the wheel shaft pipe and sleeved with a tire; the wheel shaft can be quickly assembled and disassembled by the aid of holes in the wheel shaft tube through the telescopic bosses.

8. The multi-functional foldable trolley according to claim 1 or 2, further comprising: the flat plate at the bottom of the cargo compartment can be separated from the cargo compartment and has the same size with the bottom of the cargo compartment.