CN116279711A - Four-direction folding handcart and folding method thereof - Google Patents

Four-direction folding handcart and folding method thereof Download PDF

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Publication number
CN116279711A
CN116279711A CN202310064497.2A CN202310064497A CN116279711A CN 116279711 A CN116279711 A CN 116279711A CN 202310064497 A CN202310064497 A CN 202310064497A CN 116279711 A CN116279711 A CN 116279711A
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CN
China
Prior art keywords
assembly
fixing seat
upright post
folding
side wall
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Pending
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CN202310064497.2A
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Chinese (zh)
Inventor
逄伟
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Qingdao Tiemuzhen Tools Co ltd
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Qingdao Tiemuzhen Tools Co ltd
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Priority to CN202310064497.2A priority Critical patent/CN116279711A/en
Publication of CN116279711A publication Critical patent/CN116279711A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/006—Hand-propelled vehicles or sledges being foldable or dismountable when not in use dismountable

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Abstract

The invention discloses a four-way folding handcart, which comprises a frame assembly, wherein the frame assembly comprises a telescopic handlebar assembly, two front wheel frame assemblies, two rear wheel frame assemblies, two side wall assemblies, a front wall assembly, a rear wall assembly, a bottom frame assembly, two handlebar fixing seats, two lower fixing seats and four upper fixing seats, and after the handcart is folded, the upper ends of four upright posts are separated from the upper fixing seats; after the four upright posts are unfolded, the upper ends of the four upright posts are respectively inserted into the holes of the corresponding upper fixing seats. The folding method of the four-way folding handcart is also disclosed. The invention has reasonable structural design, simple processing and assembling, complete functions, infinite extension possibility, simple folding and greatly reduced cost, ensures that the vehicle is better, stable and durable in the use process, and enhances the experience of customers.

Description

Four-direction folding handcart and folding method thereof
Technical Field
The invention relates to the technical field of folding trolleys, in particular to a four-way folding trolley and a folding method thereof.
Background
With the improvement of the living standard of people, the living and leisure modes are changed in a acquaintance way, the traditional handcart structure at present basically has two types, namely a two-way folding mechanism, the folding is convenient, but the volume after the folding is larger, the storage and the transportation occupy larger space, the carrying is not facilitated, and meanwhile, the capacity is smaller, so that the increasing use demands of consumers are not satisfied; the other type is a four-way folding mechanism, the volume occupation space after folding is small, but the structure of the traditional four-way folding mechanism is relatively complex, the assembly is complicated, the production cost is extremely high, and more, the plastic piece is used for connecting and bearing force, and the support with high strength and weight cannot be adapted, so that the after-sales rate of the product is extremely high, and the use experience of consumers is poor.
And along with increasing of logistics transportation cost, the handcart of four-way folding mechanism is more and more favored by manufacturers, therefore, need to upgrade its folding mechanism, under the prerequisite that satisfies the vehicle and stabilize durable, reduce its production processing cost, expand the functionality simultaneously and satisfy customer's needs.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the four-way folding handcart with an upgrade version, which has the advantages of reasonable structural design, simple processing and assembly, complete functions, infinite extension possibility, and special structural design, so that the handcart has better stability and durability in the using process of a vehicle and enhances the experience of customers.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the folding method of the four-way folding handcart comprises the steps of folding and gathering through stretching of the four side wall directions in the front-back, left-right and left-right directions of the folding handcart:
the left side wall and the right side wall are respectively telescopic through two first X-shaped connecting rod mechanisms which are connected end to end;
the front side wall and the rear side wall are telescopic only through a second X-shaped connecting rod mechanism;
the end parts of the X-shaped link mechanisms are respectively and directly riveted with the upper and lower fixing seats of the trolley body;
in the folding process, the upper ends of the four upright posts on the trolley body are respectively separated from the corresponding upper fixing seats, and in the unfolding process, the upper ends of the four upright posts are respectively inserted into the corresponding upper fixing seats.
Meanwhile, the invention also provides a four-way folding handcart, which comprises a frame assembly, wherein the frame assembly comprises:
the telescopic handle assembly comprises a handle, a telescopic pull rod and two side rods, the handle is arranged at the upper end of the telescopic pull rod, the upper ends of the two side rods are symmetrically connected to two sides of the lower end of the pull rod, and the lower ends of the two side rods are respectively riveted with a handle fixing seat;
the front wheel frame assembly comprises a stand column, a front wheel frame and a tire which are sequentially connected from top to bottom, the upper end of the stand column is connected with an upper fixing seat, and the lower end of the stand column is connected with a handlebar fixing seat;
the two rear wheel frame assemblies comprise upright posts, rear wheel frames and tires which are sequentially connected from top to bottom; the upper end of the upright post is connected with the upper fixing seat, and the lower end of the upright post is connected with the lower fixing seat;
the two side wall assemblies comprise two first X-shaped connecting rod mechanisms, two adjacent ends of the two first X-shaped connecting rod mechanisms are hinged with each other, the upper end parts of the two sides are respectively riveted with an upper fixing seat, and the lower end parts of the two sides are respectively riveted with a handlebar fixing seat and a lower fixing seat;
the first X-shaped connecting rod mechanism comprises two pipe fittings which are in cross riveting to form an X-shaped structure, and a connecting piece is arranged between the upper half part of one pipe fitting adjacent to the wheel frame assembly and the wheel frame assembly;
the two first X-shaped connecting rod mechanisms are hinged with each other, and a rotating piece is arranged at the position where the two first X-shaped connecting rod mechanisms are hinged with each other;
the front wall assembly comprises a second X-shaped connecting rod mechanism, and the end parts of the second X-shaped connecting rod mechanism are respectively and directly riveted with an upper fixing seat and a handlebar fixing seat of the trolley body;
a rear wall assembly, the rear wall assembly being structurally identical to the front wall assembly;
the chassis assembly comprises a third X-shaped connecting rod mechanism, and four end parts of the third X-shaped connecting rod mechanism are respectively and directly riveted with two handlebar fixing seats and two lower fixing seats of the handcart body;
the two handlebar fixing seats are respectively used for connecting the upright post, the front wheel frame, the handlebar assembly, the front wall assembly, the side wall assembly and the underframe assembly;
the fixed hinges are used for connecting the upright post, the rear wheel frame, the side wall assembly, the rear wall assembly and the underframe assembly;
the four upper fixing seats are provided with fixed hinges for connecting the upright post, the side wall assembly and the front wall assembly, and fixed hinges for connecting the upright post, the side wall assembly and the rear wall assembly;
after the handcart is folded, the upper ends of the four upright posts are separated from the upper fixing seat; after the four upright posts are unfolded, the upper ends of the four upright posts are respectively inserted into the holes of the corresponding upper fixing seats.
As a further improvement of the above technical scheme:
the lower ends of the two side rods are provided with buckles, the buckles are riveted with the handlebar fixing seat, and when the trolley is folded, the telescopic handlebar assembly is clamped on the upright post of the front wheel frame assembly through the buckles. Or when the handcart is unfolded and does not need to be pulled, the telescopic handle bar assembly can be clamped on the upright post of the front wheel frame assembly through the buckle, so that the space can be saved, and the potential safety hazard is avoided.
As a further improvement of the above technical scheme:
the whole structure of the connecting piece is similar to an H shape, two ends of the connecting piece are respectively provided with two branches, wherein the two branches at one end wrap a pipe fitting of the first X-shaped connecting rod mechanism and are riveted with the pipe fitting, and the two branches at the other end wrap an upright post of the wheel carrier assembly and are riveted with the upright post; the connecting piece is used for enabling the side wall assembly to drive the wheel frame assembly to achieve folding consistency; the part that the lower tip of upper fixing base and stand are connected sets up horn mouth form jack, and the stand upper end sets up bullet head form plug, is convenient for accurately insert in the upper fixing base when the expansion handcart in the stand upper end fixed, makes four lateral walls of vehicle connect into a whole, strengthens vehicle steadiness.
As a further improvement of the above technical scheme:
the ceiling comprises four support rods and a ceiling sleeve, the lower ends of the four support rods are respectively provided with a detachable column head, each column head is correspondingly inserted into the hole of the upper fixing seat, the upper fixing seat is extensible, and the ceiling position can be replaced by accessories in the later period, so that the functions of a desk plate, a windshield, a mosquito net and the like are increased.
As a further improvement of the above technical scheme:
the column head is provided with an inclined outward fixing hole, and the lower end of the supporting rod is inserted into the inclined fixing hole. The column head is provided with the inclined holes, so that the support rods are inclined outwards, and the ceiling sleeve is sleeved into the upper ends of the four support rods, so that the four support rods are in an outwards inclined state so as to be convenient for tightly supporting the ceiling sleeve. The column head is of a split design, and can be refitted and extended in the later stage of the design of the upper fixing seat.
As a further improvement of the above technical scheme:
the novel vehicle body cover is characterized by further comprising a vehicle body cloth cover, wherein the vehicle body cloth cover is clamped in a rectangular cavity surrounded by the underframe assembly, the two side wall assemblies, the front wall assembly and the rear wall assembly.
According to the four-way folding handcart, the four-way folding handcart adopts the structure of the double-sleeve upright post instead, the upright post is only a single tube, and in the folding process, the upper end of the upright post is separated from the upper fixing seat to realize folding and gathering; in the unfolding process of the folding handcart, the upper ends of the four stand columns are respectively and accurately inserted into the horn mouths of the upper fixing seats on the upper parts of the four stand columns, and meanwhile, in the unfolding process, the four stand columns can be accurately positioned and integrated through the traction effect of the four connecting pieces arranged on the stand columns and the side wall assembly. In addition, the end parts of the X-shaped connecting rod mechanisms of the four-direction folding parts of the handcart are respectively and directly riveted with the upper fixing seat and the lower fixing seat of the handcart body, other horizontal pipe fitting transitional connection is not needed, the folding mechanism is simplified, the production and assembly cost is reduced, and the stability of the handcart is enhanced.
The invention has the following beneficial effects:
1. in the invention, firstly, the upright post adopts a single-tube structure, the upper end of the upright post is separated from and disconnected from the upper fixing seat in the folding process, and the upright post is accurately inserted into the corresponding holes of the upper fixing seat during unfolding, so that the upright post and the side wall assembly can play a traction role simultaneously due to the connecting pieces between the upright post and the side wall assembly, and the side wall assembly drives the upright post to move during folding so as to realize action consistency; the upper end of the upright post is designed into a bullet head form, and the hole of the upper fixing seat is designed into a horn mouth shape, so that the accurate insertion of the upright post is facilitated; moreover, the upright post with the single-tube structure greatly reduces the production and processing cost, does not need the upright post in a sleeve form any more, and also avoids the phenomenon that the inner tube falls off.
2. In the invention, the height of the connecting part of the two side rods and the pull rod in the handlebar assembly is close to that of the front wall assembly, the folded clamping part of the connecting part is arranged at the position of the handlebar fixing seat, the telescopic rod is more free to use and control, the operation of users with different heights is convenient, and the structure is attractive and elegant.
3. In the invention, the ceiling is arranged, the detachable structure is formed, the four support rods can be inserted and used at once, the capacity of the handcart is expanded, the ceiling can be used for shading sun and rain, the ceiling is attractive and practical, and meanwhile, the split design of the column head reserves a simple upgrading space for adding functions such as a mosquito net, a table plate, a windshield and the like for a subsequent vehicle.
Drawings
FIG. 1 is a perspective view of a four-way folding cart according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a schematic perspective view of a four-way folding cart in a semi-folded state according to the present invention;
FIG. 6 is a front view of FIG. 5;
FIG. 7 is a side view of FIG. 5;
FIG. 8 is a top view of FIG. 5;
FIG. 9 is an enlarged view of a portion of FIG. 1 at A;
FIG. 10 is an enlarged view of a portion of FIG. 5 at B;
FIG. 11 is an enlarged view of a portion of FIG. 1 at C;
FIG. 12 is an exploded view of the strut connection;
FIG. 13 is a perspective view showing an unfolded state of a four-way folded cart mounting cloth cover in accordance with the present invention;
symbols in the drawings and description thereof:
10. a telescoping handlebar assembly; 11. a handle; 12. a telescopic pull rod; 13. a side bar; 14. a buckle; 15. a connection part;
20. a front wheel frame assembly; 21. a column; 211. a plug; 22. a front wheel frame; 23. a tire;
30. a rear wheel frame assembly; 21. a column; 32. A front wheel frame; 23. a tire;
40. a sidewall assembly; 41. a pipe fitting; 42. a connecting piece; 43. plastic rotating member
50. A front wall assembly; 51. a second X-shaped link mechanism; 52. a pipe fitting;
60. a rear wall assembly;
70. a chassis assembly; 71. a third X-shaped link mechanism; 72. a pipe fitting; 73. a connecting seat;
80. a handle bar fixing seat;
90. a lower fixing seat;
100. an upper fixing seat; 101. a bell mouth-shaped jack;
200. a ceiling; 201. a support rod; 202. a ceiling cover; 203. column head; 204. a fixing hole;
300. the vehicle body cloth cover.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-13, one embodiment provided by the present invention is: the four-way folding handcart comprises a frame assembly, wherein the frame assembly comprises a telescopic handlebar assembly 10, two front wheel frame assemblies 20, two rear wheel frame assemblies 30, two side wall assemblies 40, a front wall assembly 50, a rear wall assembly 60, a chassis assembly 70, two handlebar fixing seats 80, two lower fixing seats 90 and four upper fixing seats 100; the vehicle body cover comprises a roof 200 and a vehicle body cloth cover 300, wherein the roof 200 comprises four support rods 201 and a roof cover 202, as shown in fig. 12, detachable column heads 203 are respectively arranged at the lower ends of the four support rods 201, and each column head 203 is correspondingly inserted into a hole of the upper fixing seat 100. The vehicle body cloth cover 300 is clamped in a rectangular cavity surrounded by the underframe assembly 70, the two side wall assemblies 40, the front wall assembly 50 and the rear wall assembly 60, a tearing buckle is arranged at the outer side of the bottom of the vehicle body cloth cover 300 and connected with a connecting seat 73 of the underframe assembly 70, and a lifting handle is arranged at the inner side of the bottom of the vehicle body cloth cover for lifting the underframe assembly 70 when the vehicle body is folded.
As a further modification of the above embodiment, the stud 203 is provided with an inclined outward fixing hole 204, and the lower end of the support rod 201 is inserted into the inclined fixing hole 204. The studs 203 are provided with inclined holes so that the supporting bars 201 are inclined outwards, and the ceiling cover 202 is sleeved into the upper ends of the four supporting bars 201, because the four supporting bars 201 are in an outwards inclined state so as to be convenient for tightly supporting the ceiling cover 202.
The telescopic handle bar assembly 10 comprises a handle 11, a telescopic pull rod 12 and two side rods 13, wherein the handle 11 is arranged at the upper end of the telescopic pull rod 12, the upper ends of the two side rods 13 are symmetrically connected to the two sides of the lower end of the pull rod, a connecting part 15 is arranged between the telescopic pull rod 12 and the two side rods 13, and the lower ends of the two side rods 13 are respectively riveted with a handle bar fixing seat 80; as shown in fig. 11, the lower ends of the two side bars 13 are provided with a buckle 14, the buckle 14 is riveted with a handlebar fixing seat 80, and when the trolley is folded, the telescopic handlebar assembly is clamped on the upright post 21 of the front wheel frame assembly through the buckle 14.
Or when the handle bar does not need to be pulled, the telescopic handle bar assembly 10 is clamped on the upright post 21 of the front wheel frame assembly through the buckle 14, so that the space occupation is reduced, and the potential safety hazard of tripping other people is eliminated; the telescopic rod of telescopic handle 12 can be adjusted in height through the connecting parts 15 of two side rods and the pull rod in handle assembly 10, thereby being convenient for the operation of different crowds and reducing the folding size.
The front wheel frame assembly 20 comprises a stand column 21, a front wheel frame 22 and a tire 23 which are sequentially connected from top to bottom, wherein the upper end of the stand column 21 is connected with an upper fixing seat 100, and the lower end is connected with a handle bar fixing seat 80;
the rear wheel frame assembly 30 comprises a stand column 21, a rear wheel frame 32 and a tire 23 which are sequentially connected from top to bottom; the upper end of the upright post 31 is connected with the upper fixing seat 100, and the lower end is connected with the lower fixing seat 90;
the side wall assembly 40 comprises two first X-shaped link mechanisms, two adjacent ends of the two first X-shaped link mechanisms are hinged with each other, the upper end parts of the two sides are respectively riveted with an upper fixing seat 100, and the lower end parts of the two sides are respectively riveted with a handlebar fixing seat 80 and a lower fixing seat 90;
the first X-shaped link mechanism comprises two pipe fittings 41 which are riveted in a cross manner to form an X-shaped structure, wherein a connecting piece 42 is arranged between the upper half part of one pipe fitting adjacent to the wheel frame assembly and the wheel frame assembly; a plastic rotating piece 43 is arranged at the mutually hinged part of the two first X-shaped link mechanisms;
as shown in fig. 9, the overall structure of the connecting piece 42 is similar to an H-shape, two branches are respectively arranged at two ends, wherein the two branches at one end wrap the pipe 41 of the first X-shaped connecting rod mechanism and are riveted with the pipe 41, and the two branches at the other end wrap the upright post 21 of the wheel carrier assembly and are riveted with the upright post; the riveting refers to rotatable riveting, and during folding and unfolding of the handcart, two ends of the connecting piece 42 can rotate around the parts connected with the connecting piece, and the connecting piece 42 is used for enabling the side wall assembly 40 to drive the wheel frame assembly to achieve folding consistency; in the embodiment of the invention, in the folding process of the handcart, the upper end of the upright post 21 is separated from the upper fixing seat 100, and the upper end of the upright post is accurately inserted into the corresponding holes of the upper fixing seat 100 during unfolding, in the process, the four connecting pieces 42 play a traction role simultaneously, and the pipe 41 of the side wall assembly 40 drives the upright post 21 to move simultaneously during folding, so that the action consistency is realized; and the upright column 41 with a single-tube structure greatly reduces the production and processing cost, does not need an upright column in a sleeve form any more, and avoids the phenomenon of falling off of the inner tube.
Moreover, as a further improvement of the above embodiment, in order to facilitate the insertion of the upper end of the upright post 21 into the upper fixing base, a bell mouth-shaped insertion hole 101 is provided at the portion where the lower end of the upper fixing base 100 is connected to the upright post 21, and a bullet-shaped plug 211 is provided at the upper end of the upright post 21, so that the upper end of the upright post is accurately inserted into the upper fixing base 100 for fixing when the vehicle is unfolded.
The front wall assembly 50 comprises a second X-shaped connecting rod mechanism 51, the second X-shaped connecting rod mechanism 51 comprises two pipe fittings 52 which are riveted in a cross manner to form an X-shaped structure, and the end parts of the pipe fittings 52 are respectively riveted with an upper fixing seat 100 and a handle fixing seat 80 of the trolley body directly; the rear wall assembly 60 is structurally identical to the front wall assembly 50;
the underframe assembly 70 comprises a third X-shaped link mechanism 71, the third X-shaped link mechanism 71 comprises four pipe fittings 72 hinged into an X shape, a connecting seat 73 is arranged at four ends of one point formed by converging the four pipe fittings 72, one point is formed by converging the four pipe fittings 72 through the connecting seat 73, the four pipe fittings 72 are rotationally connected with the connecting seat 73, and the other four ends of the pipe fittings 72 are respectively and directly riveted with two handlebar fixing seats 80 and two lower fixing seats 90 of the handcart body; when the handcart is folded, the connecting seat 73 is lifted, four ends converged by the four pipe fittings 72 rotate around the connecting seat 73 and move upwards, and the four diverged ends move downwards and converge and drive the handlebar fixing seat 80 and the lower fixing seat 90 to converge and converge simultaneously, so that folding is realized.
The handlebar fixing seat 80 is a fixed rivet joint for connecting the upright post 21, the front wheel frame 22, the telescopic handlebar assembly 10, the front wall assembly 50, the side wall assembly 40 and the chassis assembly 70; and each connecting part is provided with a riveting fixing hole for riveting and fixing with the corresponding connecting part.
The lower fixing base 90 is a fixed rivet joint for connecting the pillar 21, the rear wheel frame 32, the side wall assembly 40, the rear wall assembly 60, and the chassis assembly 70, and each connecting portion thereof is provided with a rivet fixing hole for rivet fixing with a corresponding connecting member, respectively.
Of the four upper holders 100, the first two are fixed rivet joints for connecting the pillar 21, the side wall assembly 40, and the front wall assembly 50, and the second two are fixed rivet joints for connecting the pillar 21, the side wall assembly 40, and the rear wall assembly 60. Each of the connection portions of the four upper fixing seats 100 is provided with a rivet fixing hole for rivet fixing with a corresponding connection member, respectively.
As shown in fig. 5, after the cart is folded, the upper ends of the four posts 21 are separated from the upper fixing base 100; after the unfolding, as shown in fig. 1, the upper ends of the four upright posts 21 are respectively inserted into the holes of the corresponding upper fixing base 100. The cost is greatly saved, four corners of the frame body are connected in series, the stability of the vehicle is improved, and the structure is simple and remarkable.
According to the four-way folding trolley disclosed by the embodiment of the invention, the upright post 21 is designed into a single tube, and in the folding process, the upper end of the upright post 21 is separated from the upper fixing seat 100 to be disconnected so as to realize folding and gathering; in the unfolding process, the upper ends of the four upright posts 21 are respectively and accurately inserted into the bell mouth of the upper fixing seat 100 at the upper part of the upper fixing seat, and in the folding and unfolding processes, the four upright posts 21 can be accurately positioned due to the traction driving action of the four connecting pieces 42. The upper end of the upright post 21 is designed into a bullet head form, and the hole of the upper fixing seat 100 is designed into a horn mouth shape, so that the accurate insertion of the upright post 21 is facilitated; moreover, the upright post 21 with a single-tube structure greatly reduces the production and processing cost. In addition, the embodiment is provided with the ceiling 200 in a detachable structure, the four support rods 201 are inserted and used at once, the capacity of the handcart is expanded, the ceiling 200 can shade sun and rain, the design is attractive and practical, and meanwhile, the split type column head 203 reserves a simple upgrading space for adding functions such as a mosquito net, a table plate, a windshield and the like for a subsequent vehicle.
The folding method of the four-way folding handcart of the embodiment realizes folding and gathering through the expansion and contraction of the front, back, left and right side wall directions: the left side wall and the right side wall are respectively telescopic through two first X-shaped connecting rod mechanisms which are connected end to end; the front side wall and the rear side wall are telescopic only through a second X-shaped connecting rod mechanism; the end parts of the X-shaped link mechanisms are respectively and directly riveted with the upper and lower fixing seats of the trolley body; in the folding process, the upper ends of the four upright posts on the trolley body are respectively separated from the corresponding upper fixing seats, and in the unfolding process, the upper ends of the four upright posts are respectively inserted into the corresponding upper fixing seats.
Specifically, the folding and unfolding process of the four-way folding cart of the present embodiment is as follows:
as shown in fig. 5, when folding, the connecting seat 73 is lifted upwards, the four ends of the four tubes 72 connected by the connecting seat 73 rotate around the connecting seat 73 and move upwards, the divergent four ends move downwards and converge and pull the two handle bar fixing seats 80 and the two lower fixing seats 90 at the four corners together to converge and converge towards the center, the connected tires 23 and the upper fixing seats 100 together to converge and converge towards the center, the tubes 41 of the side wall assembly 40 are pushed to converge towards the center, at the moment, the four connecting pieces 42 pull the upright posts 21, the upper ends of the upright posts 21 are separated from the upper fixing seats 100 in the moving process, meanwhile, the corresponding tubes of the front wall assembly 50 and the rear wall assembly 60 are also converged, finally, the telescopic handle bar assembly 10 is clamped on the upright posts 21 of the front wheel frame assembly 20 after being contracted until the front and rear tires are contacted with each other.
As shown in fig. 1, during the expansion, in the opposite process to the above, the connecting seat 73 is pressed downwards, the four ends where the four tubes 72 connected to the connecting seat 73 converge rotate around the connecting seat 73 and move downwards, while the four diverged ends move upwards and spread out, simultaneously, the two handlebar fixing seats 80 and the two lower fixing seats 90 at the four corners are pushed to spread out together, the connected tires 23 and the upper fixing seat 100 spread out together, the tube 41 of the side wall assembly 40 is pushed to spread out, at this time, the four connecting pieces 42 also pull the upright post 21, the upper ends of the upright post 21 are inserted into the upper fixing seat 100 during the movement, and at the same time, the corresponding tubes of the front wall assembly 50 and the rear wall assembly 60 are also stretched out until the whole vehicle body is completely expanded to the state of fig. 1.
In the folding and unfolding processes, the operation of the telescopic handle bar assembly 10 is independent, and telescopic according to actual needs, and the operation linkage with a vehicle body is not needed. During the folding process, the telescopic pull rod 12 is retracted and clamped on the upright post 21 through the buckle 14; after the expansion, if the vehicle does not need to be pulled and operated, the telescopic handle bar assembly 10 does not need to be expanded, and is clamped on the upright post 21 through the buckle 14, so that the space occupation is reduced, and the potential safety hazard of stumbling others is eliminated; only when the vehicle is pulled to walk, the telescopic pull rod 12 is pulled, the buckle 14 is separated from the upright post 21, the height is adjusted, and the height of a tractor is adapted to the height for operation.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims (7)

1. The folding method of the four-way folding handcart is characterized by comprising the following steps of:
folding handcart realizes folding gathering through four lateral wall directions around, flexible about:
the left side wall and the right side wall are respectively telescopic through two first X-shaped connecting rod mechanisms which are connected end to end;
the front side wall and the rear side wall are telescopic only through a second X-shaped connecting rod mechanism;
the end parts of the X-shaped link mechanisms are respectively and directly riveted with the upper and lower fixing seats of the trolley body;
in the folding process, the upper ends of the four upright posts on the trolley body are respectively separated from the corresponding upper fixing seats, and in the unfolding process, the upper ends of the four upright posts are respectively inserted into the corresponding upper fixing seats.
2. The utility model provides a four-way folding handcart, includes frame assembly, its characterized in that: the frame assembly includes:
the telescopic handle assembly comprises a handle, a telescopic pull rod and two side rods, the handle is arranged at the upper end of the telescopic pull rod, the upper ends of the two side rods are symmetrically connected to two sides of the lower end of the pull rod, and the lower ends of the two side rods are respectively riveted with a handle fixing seat;
the front wheel frame assembly comprises a stand column, a front wheel frame and a tire which are sequentially connected from top to bottom, the upper end of the stand column is connected with an upper fixing seat, and the lower end of the stand column is connected with a handlebar fixing seat;
the two rear wheel frame assemblies comprise upright posts, rear wheel frames and tires which are sequentially connected from top to bottom; the upper end of the upright post is connected with the upper fixing seat, and the lower end of the upright post is connected with the lower fixing seat;
the two side wall assemblies comprise two first X-shaped connecting rod mechanisms, two adjacent ends of the two first X-shaped connecting rod mechanisms are hinged with each other, the upper end parts of the two sides are respectively riveted with an upper fixing seat, and the lower end parts of the two sides are respectively riveted with a handlebar fixing seat and a lower fixing seat;
the first X-shaped connecting rod mechanism comprises two pipe fittings which are in cross riveting to form an X-shaped structure, and a connecting piece is arranged between the upper half part of one pipe fitting adjacent to the wheel frame assembly and the wheel frame assembly;
the two first X-shaped connecting rod mechanisms are hinged with each other, and a rotating piece is arranged at the hinged part of the two first X-shaped connecting rod mechanisms;
the front wall assembly comprises a second X-shaped connecting rod mechanism, and the end parts of the second X-shaped connecting rod mechanism are respectively and directly riveted with an upper fixing seat and a handlebar fixing seat of the trolley body;
a rear wall assembly, the rear wall assembly being structurally identical to the front wall assembly;
the chassis assembly comprises a third X-shaped connecting rod mechanism, and four end parts of the third X-shaped connecting rod mechanism are respectively and directly riveted with two handlebar fixing seats and two lower fixing seats of the handcart body;
the two handlebar fixing seats are respectively used for connecting the upright post, the front wheel frame, the handlebar assembly, the front wall assembly, the side wall assembly and the underframe assembly;
the fixed hinges are used for connecting the upright post, the rear wheel frame, the side wall assembly, the rear wall assembly and the underframe assembly;
the four upper fixing seats are provided with fixed hinges for connecting the upright post, the side wall assembly and the front wall assembly, and fixed hinges for connecting the upright post, the side wall assembly and the rear wall assembly;
after the handcart is folded, the upper ends of the four upright posts are separated from the upper fixing seat; after the four upright posts are unfolded, the upper ends of the four upright posts are respectively inserted into the holes of the corresponding upper fixing seats.
3. The four-way folding cart of claim 2, wherein: the lower ends of the two side rods are provided with buckles, the buckles are riveted with the handlebar fixing seat, and when the trolley is folded or unfolded and does not push or pull, the telescopic handlebar assembly is clamped on the upright post of the front wheel frame assembly through the buckles.
4. The four-way folding cart of claim 2, wherein: the whole structure of the connecting piece is similar to an H shape, two ends of the connecting piece are respectively provided with two branches, wherein the two branches at one end wrap a pipe fitting of the first X-shaped connecting rod mechanism and are riveted with the pipe fitting, and the two branches at the other end wrap an upright post of the wheel carrier assembly and are riveted with the upright post; the part of the lower end part of the upper fixing seat, which is connected with the upright post, is provided with a bell mouth-shaped jack, and the upper end of the upright post is provided with a bullet-shaped plug.
5. The four-way folding cart of claim 2, wherein: the detachable column heads are respectively arranged at the lower ends of the four support rods, and each column head is correspondingly inserted into the hole of the upper fixing seat.
6. The four-way folding cart of claim 5, wherein: the column head is provided with an inclined outward fixing hole, and the lower end of the supporting rod is inserted into the inclined fixing hole.
7. The four-way folding cart of claim 2, wherein: the novel vehicle body cover is characterized by further comprising a vehicle body cloth cover, wherein the vehicle body cloth cover is clamped in a rectangular cavity surrounded by the underframe assembly, the two side wall assemblies, the front wall assembly and the rear wall assembly.
CN202310064497.2A 2023-01-13 2023-01-13 Four-direction folding handcart and folding method thereof Pending CN116279711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310064497.2A CN116279711A (en) 2023-01-13 2023-01-13 Four-direction folding handcart and folding method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310064497.2A CN116279711A (en) 2023-01-13 2023-01-13 Four-direction folding handcart and folding method thereof

Publications (1)

Publication Number Publication Date
CN116279711A true CN116279711A (en) 2023-06-23

Family

ID=86780536

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310064497.2A Pending CN116279711A (en) 2023-01-13 2023-01-13 Four-direction folding handcart and folding method thereof

Country Status (1)

Country Link
CN (1) CN116279711A (en)

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