CN217532890U - Folding bicycle - Google Patents

Abstract

The utility model discloses a folding bicycle, include: the frame main body assembly is provided with an upper frame and a lower frame which are integrally linked and synchronously folded, and a supporting stress frame and a wheel frame which are connected between the upper frame and the lower frame, wherein the upper frame and the supporting stress frame are mutually pivoted; the lower frame is rotatably connected with the wheel frame, and the supporting stress frame is horizontally connected with the wheel frame; the lower frame is provided with a switching lifting rod for realizing folding and opening; the front wheel and the rear wheel are connected on the wheel frame in a staggered manner, and the axis of the wheel and the supporting point of the wheel frame are arranged in an eccentric manner; and the eccentric directions of the front wheel and the rear wheel are reversely arranged; the pushing handle is rotationally connected to the wheel frame and can be adjusted in a locking mode at any angle between the horizontal direction and the vertical direction. This folding car can wholly fold, can realize linkage synchronous folding, and folding car atress structural design is reasonable, and is more stable during the use.

Description

Folding bicycle

Technical Field

The utility model relates to a folding car technical field especially relates to a but camping is with folding car of whole folding.

Background

Outdoor activities become people's leisure activities's choice item more and more, because folding car storage space for outdoor use is big, it is convenient to transport article, it is duty for a short time after folding taking in, therefore, also more and more become people's year first-selected of thing, current folding car for outdoor use is basically by the frame, pushing hands and wheel constitute, folding process is generally folding up through the frame, folding of pushing hands is realized, in order to realize folding purpose, the structure of frame adopts the car pole basically and rotates the piece to be connected, but current folding car has folding structure complicacy in the use, the operation is inconvenient, and simultaneously, the existence is unreasonable because the stress point design, can have in the use behind the year thing turn on one's side, unexpected folding scheduling problem and the external force strong point of taking in of folding up the in-process needs can realize accomodating, it can not realize desynchronously to fold, the inconvenient scheduling problem of operation.

For example, chinese patent document (publication date: 8/2017, publication number: CN 105408187B) discloses a foldable wagon having a collapsible frame that converts the wagon from a use configuration to a folded configuration for storage and transport. The foldable wagon has a collapsible frame positionable in an open position and a collapsed position, a plurality of wheels coupled to the collapsible frame, a plurality of substantially rigid seats pivotally coupled to the collapsible frame, and a flexible housing forming sidewalls for the wagon about the collapsible frame. Each substantially rigid seat has a substantially rigid seat back and a substantially rigid seat bottom hingedly coupled to the seat back.

The technical scheme discloses a foldable trolley, which mainly adopts the folding mode of the existing foldable trolley and mainly comprises foldable frame components, and specifically adopts components such as a first frame upper frame, a second upper frame, a first main frame, a second main frame, a first underframe member, a second underframe member, a pin joint bracket, a suspension support rod, a central pivot, a driving connecting rod and the like. This technical scheme is in order to realize stress point balance problem, and consequently it is structurally complicated relatively, and folding process needs outside stress point, just can realize folding up, simultaneously, at folding in-process, the frame with hang bracing piece and drive connecting rod and have folding asynchronous scheduling problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art stress point design unreasonable, folding accomodate inconveniently, appear turning on one's side easily in the use, the unexpected scheduling problem of folding up, and provide a stress point reasonable in design, use safe and reliable, simple structure, the frame is whole synchronous once is folded up when folding up, need not fold lightly with the external force strong point, convenient operation is swift, can use in various different outdoor environment, camp with folding car and the folding method that can wholly fold.

The utility model discloses the technical scheme who realizes its invention purpose adoption does: a folding cart comprising:

the frame main body assembly is provided with an upper frame and a lower frame which are integrally linked and synchronously folded, and a supporting stress frame and a wheel frame which are connected between the upper frame and the lower frame, wherein the upper frame and the supporting stress frame are mutually pivoted; the lower frame is rotatably connected with the wheel frame, and the supporting stress frame is horizontally connected with the wheel frame; the lower frame is provided with a switching lifting rod for realizing folding and opening;

the front wheel and the rear wheel are connected on the wheel carrier in a staggered manner, and the axis of the wheel is eccentrically arranged with the supporting point of the wheel carrier; the eccentric directions of the front wheel and the rear wheel are arranged in opposite directions;

the pushing handle is connected to the wheel carrier in a telescopic rotating mode.

The folding bicycle is characterized in that the frame main body assembly mainly comprises an upper frame, a lower frame, a supporting stress frame and a wheel frame which are linked and folded synchronously, and the upper frame, the lower frame, the supporting stress frame and the wheel frame synchronously move together in the folding process, so that the problem of inconvenient operation caused by asynchronism of the prior art that one part of the upper frame and the lower frame moves firstly in the folding process and the other part moves later is solved. The upper frame is connected with the supporting stress frame, the supporting stress frame is horizontally butted with the wheel frame, force is stably transmitted to the wheel frame through the supporting stress frame, the lower frame is connected with the wheel frame, the force transmitted by the upper frame cannot be borne, the whole folding stress structure is reasonable in design, the whole folding vehicle is more stable in the using process, and the phenomena of side turning and the like due to unreasonable stress cannot occur. Simultaneously, this folding car, dislocation set is littleer at folding process accommodation space around the wheel, it is more convenient to deposit, the axis and the eccentric formula setting of wheel carrier strong point of wheel, make wheel atress direction all the time towards the frame outside, simultaneously, the eccentric direction of front and back wheel sets up in reverse, make the atress of wheel all the time in balanced state around the whole folding car, make this folding car no matter all locate balanced state under load or no load state, antedisplacement or retrodisplacement phenomenon can not appear in the folding car, when promoting or pulling folding car, no matter move folding car towards the place ahead or rear, because the eccentric formula structure, it is more convenient to promote, and is laborsaving.

Preferably, the upper frame comprises a first frame and a second frame which are symmetrically arranged, and the first frame and the second frame are respectively formed by splicing an edge pipe and an elbow pipe; the first frame and the second frame are folded downwards and can be turned upwards at an included angle. The upper frame is symmetrically provided with the first frame and the second frame and is formed by splicing the side pipes and the bent pipes, so that the upper frame is convenient to manufacture and fast to splice; and can realize the lightweight setting of frame, and in order to realize the whole folding of frame, first frame and second frame can wholly fold down when folding, simultaneously, in order to satisfy the demand of placing of different article, first frame and second frame also can upwards overturn respectively and be certain contained angle setting with water flat line, can realize carrying the needs of thing better in the use, especially to being objects such as spherical or circular, place more stably, the volume is bigger.

Preferably, the lower frame includes a first grid frame and a second grid frame, and the first grid frame and the second grid frame are symmetrically arranged with the transfer lifting rod as a symmetry axis and are rotatably connected to the transfer lifting rod through a set of transfer components.

Preferably, the switching assembly comprises a first switching joint and a second switching joint which take the switching lifting rod as a rotating shaft, one end of the first switching joint is provided with a U-shaped switching seat, the other end of the first switching joint is provided with a first lower frame socket, one end of the second switching joint is provided with an arc-shaped switching joint, and the other end of the second switching joint is provided with a second lower frame socket; the switching subassembly and switching shadoof between be provided with the linkage structure of folding up, the linkage structure of folding up including setting up at the inside homopolar counter weight magnet of first adapter and second adapter and setting up the heteropolar magnet in the switching shadoof respectively. The arrangement of the switching assembly is to realize mutual folding of the lower frame in the folding process, and in order to realize linkage type synchronous folding of the folding vehicle, the first switching head and the second switching head are arranged in a rotating mode by taking the switching lifting rod as a rotating shaft, and the first switching head and the second switching head are respectively provided with a lower frame socket, so that the lower frame can be conveniently inserted and connected. Because the existing folding vehicle needs an external supporting point in the folding process, and the folding operation is very inconvenient because the folding operation is realized by taking human feet as supporting stress points, a folding linkage structure is arranged between the switching assembly and the switching lifting rod, specifically, two homopolar counterweight magnets with counterweight functions are respectively arranged in the first adapter and the second adapter, and heteropolar magnets are correspondingly arranged in the matching part of the switching lifting rod and the first adapter and the second adapter; when the folding car is in the horizontal open mode, the homopolar counterweight magnets in the first adapter and the second adapter respectively adsorb with the heteropolar magnets in the switching lifting rod, so that the stable connection of the folding car is realized, and meanwhile, the occurrence of the upward accidental turnover phenomenon in the use process can be effectively avoided. Need folding car at folding car, to lifting the switching shadoof, the homopolar counter weight magnet of first adapter and second adapter inside breaks away from the absorption with the heteropolar magnet of switching shadoof inside because action of gravity, to the below motion of keeping away from the switching shadoof, cooperation switching shadoof realizes folding up automatically, does not need the external stay stress point just can realize that the coordinated type of whole folding car is folded up in step.

Preferably, the upper frame and the supporting stress frame are pivoted with each other through a pivoting component; the two groups of the supporting stress frames are symmetrically arranged, each group of the supporting stress frames respectively comprises two stressed inclined tubes and two stressed pull rods, the upper ends of the two stressed inclined tubes are coaxially pivoted with the pivoting assembly, the lower ends of the two stressed inclined tubes are respectively provided with a horizontal plug, the horizontal plugs are respectively spliced with the wheel carrier, and the horizontal plugs on the two stressed inclined tubes are reversely arranged; one end of each stress pull rod is connected with the upper frame close to the pivoting component in a switching mode, and the other end of each stress pull rod is connected with the upper end of the stress inclined tube in a switching mode. Support the atress frame and be provided with two sets ofly along automobile body width direction bilateral symmetry, every group supports the atress frame and mainly has two atress pipe chute and two atress pull rods to constitute, the coaxial pin joint in pin joint subassembly in the upper end of two atress pipe chutes of same internal portion of group, and the lower extreme of two atress pipe chutes passes through horizontal plug and wheel carrier level grafting, reverse setting around the horizontal plug, thereby make the atress of frame in the horizontal direction be in balanced state all the time, frame overall stability improves greatly, when placing object article, forward backward movement or gliding phenomenon can not appear in the frame. The two ends of the stressed pull rod close to the pivoting assembly are respectively and rotatably connected to the upper frame and the stressed inclined tube through rotating shafts similar to pin shafts or riveting shaft structures, so that a supporting body of a triangular structure is formed between the upper frame and the stressed inclined tube, and the upper frame and the stressed inclined tube are in a stable state when the frame is in an open state; and the stressed pull rod can realize synchronous linkage folding of the upper frame and the stressed inclined tube in the folding process.

Preferably, the pivoting assembly comprises a U-shaped groove body and a hinge piece arranged inside the U-shaped groove body; the hinge part is provided with an inclined tube hinge socket.

As another preferred mode, the upper frame and the supporting stress frame are pivoted with each other through a pivoting shaft; the supporting stress frames are symmetrically provided with two groups, each group of supporting stress frames respectively comprises two stress inclined tubes and two stress pull rods, the upper ends of the two stress inclined tubes are coaxially pivoted in an X shape, the upper ends of the two stress inclined tubes are pivoted with the inner part and the outer part of the upper frame in a staggered manner, the upper ends of the two stress inclined tubes are provided with horizontal switching parts, and the horizontal switching parts are rotatably connected with the upper frame through pivoting shafts; the lower ends of the two stress inclined pipes are respectively provided with a horizontal plug, and the horizontal plugs are respectively inserted into the wheel carrier; one end of each stress pull rod is connected with the upper frame close to the pivot shaft in a switching mode, and the other end of each stress pull rod is connected with the upper end of the stress inclined tube in a switching mode and is located below the coaxial pivot joint. The upper frame and the supporting stress frame can be directly pivoted through the pivoting shaft, in order to realize the integral stability of the frame, the upper ends of the stress inclined tubes are mutually and coaxially pivoted to form an X-shaped pivoting structure, the upper ends of the two stress inclined tubes are pivoted with the inner part and the outer part of the upper frame in a staggered manner, the structure can be synchronously linked and folded in the folding process, and the stress pull rods are respectively and rotatably connected between the upper frame and the stress inclined tubes to form a balanced stress structure and a folding linkage structure. This scheme, the structure is simpler, and the practicality is strong, folds up more convenient and fast.

Preferably, the wheel frame comprises a front wheel frame component and a rear wheel frame component, and the front wheel frame component and the rear wheel frame component respectively comprise a bottom pipe and a wheel frame connecting piece. The wheel carrier is provided with a front wheel carrier assembly and a rear wheel carrier assembly, so that the front wheels and the rear wheels can be arranged in a staggered mode, and meanwhile, the front wheel carrier assembly and the rear wheel carrier assembly form a stress balance mechanism of the folding bicycle, so that the function of supporting is achieved, and the function of balancing is also achieved.

Preferably, the wheel frame connecting piece comprises a wheel socket, an inclined tube socket and a bottom tube socket, wherein the axis of the wheel socket is vertically arranged, and the axes of the inclined tube socket and the bottom tube socket are horizontally arranged and vertically arranged with the axis space of the wheel socket; the inner side of the inclined tube socket is horizontally provided with a lower frame adapter shaft perpendicular to the axis of the inclined tube socket. The wheel frame connecting piece is a connecting part for connecting a wheel, a supporting stress frame, an upper frame and a lower frame, in order to realize reasonable design of stress points, a wheel socket is integrally arranged on the wheel frame connecting piece to facilitate the plug-in connection of the wheel, an inclined tube socket is arranged to meet the requirements of the plug-in connection of the supporting stress frame and realize the respective design of the stress points, the bottom tube socket is used for facilitating the plug-in connection of a bottom tube in a wheel frame, the axes of the inclined tube socket and the bottom tube socket are horizontally arranged and are vertically arranged with the axis space of the wheel socket, the structure realizes the contract distribution of the stress points in the horizontal and vertical directions, a lower frame switching shaft is horizontally arranged on the inner side of the inclined tube socket and is vertical to the axis of the inclined tube socket, the rotating connection of the lower frame is facilitated, meanwhile, the effect that the force on the upper frame acts on the outer side of the wheel frame connecting piece, and the balanced arrangement of the force on the inner side of the wheel frame connecting piece is realized, and the integral stability of the folding vehicle is effectively increased.

Preferably, the wheel is connected with the wheel socket in a plug-in manner through an eccentric wheel seat, and the eccentric wheel seat and the wheel switching axis are arranged to deviate from the axis of the wheel socket; the wheel socket is provided with a containing slot, the eccentric wheel seat is provided with a telescopic rod, and the telescopic rod is spliced with the wheel socket and is connected with a rotating ball head in a folding type switching way along the containing slot; the wheels are in a single-wheel structure, a double-wheel structure or a three-wheel structure. The wheel is connected with the wheel socket through an eccentric wheel seat in a plug-in manner, so that the whole wheel can be replaced quickly, and the wheel can be replaced by a wheel structure with different purposes such as double wheels or three wheels and the like according to the requirement, for example, the requirement of climbing stairs can be met by the three-wheel structure, the pushing requirement of soft ground can be met by the double-wheel structure, and the like; the eccentric wheel seat and the wheel switching axis are arranged to deviate from the axis of the wheel socket, so that the stress direction of the wheel always faces to the outer side of the frame, namely the stress direction of the wheel always faces forwards and backwards, and the wheel can be conveniently pushed and pulled; in order to satisfy the folding car only folding wheel and folding frame's demand not, be provided with on the wheel socket and accomodate the fluting, the telescopic link is connected and is connected through a rotation axis rotation with the wheel socket plug-in card, the telescopic link can stretch out and draw back from top to bottom in order to realize the regulation of wheel height, can follow simultaneously and accomodate the fluting and upwards fold, thereby make the underframe can place the department with ground or railway carriage etc. in the planar mode and contact, when guaranteeing to place the balance, can not appear removing or sliding, the height space has still been saved simultaneously, can satisfy folding car in the inside not foldable placing of vehicle trunk.

The utility model has the advantages that: the folding vehicle has the advantages that the upper frame and the lower frame, the supporting stress frame and the wheel frame synchronously act together in the folding process, and the problem of asynchronous folding in the prior art is solved. The supporting stress frame and the wheel carrier adopt a horizontal butt joint mode, the whole folding stress structure is reasonable in design, more stable in use, and can not be turned on laterally due to unreasonable stress and the like. The staggered arrangement is littleer in folding process storage space around the wheel, and it is more convenient to deposit, and the axis and the eccentric formula setting of wheel carrier strong point of wheel to and the reverse setting of eccentric direction of front and back wheel, the frame atress is in balanced state all the time, automatic antedisplacement or backward movement phenomenon can not appear, because eccentric formula structure, it is more convenient, laborsaving to promote.

Drawings

Fig. 1 is a schematic structural view of the folding cart of the present invention;

FIG. 2 is a schematic view of the folding cart according to the present invention in a folded state;

fig. 3 is a schematic structural view of the folding cart of the present invention after being completely folded;

fig. 4 is a using state diagram of the folding cart of the present invention;

fig. 5 is a schematic view of the structure of the transfer assembly of the present invention engaged with the transfer handle;

fig. 6 is a schematic view of an exploded structure of the transfer assembly of the present invention;

fig. 7 is a schematic structural view of an internal folding linkage structure of the transfer assembly of the present invention;

fig. 8 is a schematic structural view of the middle wheel frame connecting member of the present invention;

fig. 9 is a schematic structural view of the eccentric wheel seat and the wheel carrier connecting member of the present invention;

fig. 10 is a schematic structural view of the hub assembly of the present invention;

FIG. 11 is a schematic view of a second configuration of the foldable wagon of the present invention;

FIG. 12 is another angular configuration of the second configuration of the foldable wagon of the present invention;

in the figure: 1. a frame main body component, 2, an upper frame, 21, a first frame, 22, a second frame, 3, a lower frame, 31, a first grid frame, 32, a second grid frame, 4, a supporting stress frame, 41, a stress inclined tube, 42, a stress pull rod, 43, a horizontal plug, 44, an arc-shaped limit sliding groove, 45, a horizontal switching part, 5, a wheel frame, 51, a front wheel frame component, 52, a rear wheel frame component, 53, a bottom tube, 54, a wheel frame connecting piece, 55, a wheel socket, 56, an inclined tube socket, 57, a bottom tube socket, 58, a lower frame switching shaft, 59, a containing groove, 6, a pivoting component, 61, a U-shaped groove body, 62 and a hinge piece, 63, a pipe chute hinge socket, 64, a turnover cover, 65, a pivoting hole, 66, a pivoting shaft, 7, a switching lifting rod, 8, a wheel, 8a, a front wheel, 8b, a rear wheel, 81, an eccentric wheel seat, 82, a telescopic rod, 83, a rotating ball head, 9, a pushing handle, 91, a rotating piece, 92, a handle, 93, a telescopic rod, 10, a side pipe, 11, a bent pipe, 12, a switching component, 13, a first adapter, 14, a second adapter, 15, a U-shaped adapter, 16a, a first lower frame socket, 16b, a second lower frame socket, 17, an arc-shaped adapter, 18, a folding linkage structure, 19, a homopolar counterweight magnet, 20 and a heteropolar magnet.

Detailed Description

The following describes the technical solution of the present invention in further detail through specific embodiments and with reference to the accompanying drawings.

Example 1:

in the embodiment shown in fig. 1, 2, and 3, an outdoor foldable vehicle for realizing linkage synchronous folding by using an integral folding manner includes:

the frame main body component 1 is provided with an upper frame 2 and a lower frame 3 which are integrally arranged in a linkage manner and synchronously folded, a supporting stress frame 4 and a wheel frame 5 which are connected between the upper frame 2 and the lower frame 3, and the upper frame 2 and the supporting stress frame 4 are mutually pivoted through a pivoting component 6; the lower frame 3 is rotationally connected with the wheel frame 5, and the supporting stress frame 4 is horizontally connected with the wheel frame 5; a switching lifting rod 7 for realizing folding and opening is arranged on the lower frame 3;

the front wheel and the rear wheel are connected on the wheel carrier 5 in a staggered manner, and the axis of the wheel and the wheel carrier supporting point are arranged in an eccentric manner; the eccentric directions of the front wheel and the rear wheel are arranged in opposite directions;

a push handle 9, wherein the push handle 9 is rotationally connected to the wheel carrier 5 and can be locked and adjusted at any angle between the horizontal direction and the vertical direction.

The upper frame 2 comprises a first frame 21 and a second frame 22 which are symmetrically arranged, and the first frame 21 and the second frame 22 are respectively formed by splicing an edge pipe 10 and an elbow pipe 11; the first frame 21 and the second frame 22 are folded downward and can be turned upward at an angle. Go up frame 2 symmetry and set up first frame 21 and second frame 22, adopt limit pipe 10 and return bend 11 to peg graft moreover and form, the preparation is convenient, and it is swift to peg graft, can realize the lightweight setting of frame.

In order to meet the placing requirements of different articles, in another embodiment, the first frame 21 and the second frame 22 can be respectively turned upwards to form a certain included angle with the horizontal line, so that the requirement of carrying objects can be better met in the using process, and particularly, the placing is more stable and the volume is larger for objects in a spherical shape or a circular shape. As shown in fig. 4, in order to meet the requirement of turning upward, a turning cover 64 is rotatably connected to the pivot assembly 6, the turning cover is clamped with the pivot assembly 6, and when the first frame 21 and the second frame 22 need to be turned upward by a certain angle, the turning cover is opened, and the first frame and the second frame are rotated upward to form a certain angle with the horizontal plane, generally, an angle of 15 degrees or 30 degrees is preferred.

The lower frame 3 comprises a first grid rack 31 and a second grid rack 32, the first grid rack 31 and the second grid rack 32 are symmetrically arranged by taking the transfer lifting rod 7 as a symmetry axis and are rotatably connected to the transfer lifting rod 7 through a group of transfer components 12.

As shown in fig. 5 and 6, the switching assembly 12 includes a first adapter 13 and a second adapter 14 using the switching lifting rod 7 as a rotating shaft, one end of the first adapter 13 is provided with a U-shaped adapter 15, the other end of the first adapter is provided with a first lower frame socket 16a, one end of the second adapter 14 is provided with an arc adapter 17, and the other end of the second adapter is provided with a second lower frame socket 16b; as shown in fig. 7, a folding linkage structure 18 is disposed between the switching assembly 12 and the switching lifting bar 7, and the folding linkage structure 18 includes homopolar counterweight magnets 19 disposed inside the first adapter and the second adapter respectively, and heteropolar magnets 20 disposed inside the switching lifting bar. In order to realize linkage type synchronous folding of the folding vehicle, the first adapter 13 and the second adapter 14 are rotatably arranged by taking the switching lifting rod 7 as a rotating shaft, and a first lower frame socket 16a and a second lower frame socket 16b are respectively arranged on the first adapter and the second adapter, so that the lower frames can be conveniently plugged and connected. Because the existing folding cart needs an external supporting point in the folding process, and the folding operation is very inconvenient because the folding cart generally takes human feet as a supporting stress point, a folding linkage structure 18 is arranged between the switching assembly and the switching lifting rod, specifically, two homopolar counterweight magnets 19 with counterweight functions are respectively arranged in the first switching joint and the second switching joint, and heteropolar magnets 20 are correspondingly arranged in the matching part of the switching lifting rod and the first switching joint and the second switching joint; the magnets may preferably be of spherical configuration, square configuration, pyramidal configuration, or the like. When folding car was in the level open mode, the homopolar counter weight magnet of first adapter and second adapter inside adsorbs with the heteropolar magnet of switching shadoof inside respectively, has realized the stable connection of folding car, simultaneously, can effectively avoid appearing upwards unexpected the emergence of rolling over a phenomenon of turning over in the use. Need folding car at folding car, to lifting the switching shadoof, the homopolar counter weight magnet of first adapter and second adapter inside breaks away from the absorption with the heteropolar magnet of switching shadoof inside because action of gravity, to the below motion of keeping away from the switching shadoof, cooperation switching shadoof realizes folding up automatically, does not need the external stay stress point just can realize that the coordinated type of whole folding car is folded up in step.

The two groups of the supporting stress frames 4 are symmetrically arranged, each group of the supporting stress frames 4 respectively comprises two stress inclined tubes 41 and two stress pull rods 42, the upper ends of the two stress inclined tubes 41 are coaxially pivoted with the pivoting component 6, the lower ends of the two stress inclined tubes 41 are respectively provided with a horizontal plug 43, the horizontal plugs 43 are respectively spliced with the wheel carrier 5, and the horizontal plugs 43 on the two stress inclined tubes 41 are reversely arranged; one end of each of the two force-bearing pull rods 42 is connected with the upper frame 2 near the pivot assembly 6, and the other end is connected with the upper end of the force-bearing inclined tube 41. The supporting stress frame 4 is provided with two groups along the bilateral symmetry of the width direction of the vehicle body, each group of supporting stress frames 4 mainly comprises two stress inclined tubes 41 and two stress pull rods 42, the upper ends of the two stress inclined tubes 41 in the same group are coaxially pivoted in the pivoting component 6, the lower ends of the two stress inclined tubes 41 are horizontally inserted with the wheel carrier 5 through horizontal plugs 43, the horizontal plugs 43 are reversely arranged in the front and back direction, so that the stress of the vehicle frame in the horizontal direction is always in a balanced state, the overall stability of the vehicle frame is greatly improved, and when articles are placed, the vehicle frame cannot move forwards and backwards or slide. The two ends of the stressed pull rod 42 close to the pivot assembly 6 are respectively connected to the upper frame and the stressed inclined tube in a rotating manner through a rotating shaft similar to a pin shaft or a riveting shaft structure, and in the embodiment, the two ends are connected in a rotating manner through riveting shafts; a support body with a triangular structure is formed between the upper frame and the stress inclined tube, and the upper frame and the stress inclined tube are in a stable state when the frame is in an open state; and the stressed pull rod can realize synchronous linkage folding of the upper frame and the stressed inclined tube in the folding process. In another embodiment, the upward turning of the first upper frame and the second upper frame is matched, an arc-shaped limiting sliding groove 44 is formed in the stress inclined tube 41, different limiting grooves are formed in the arc-shaped limiting sliding groove 44, so that the stress pull rod can be located in different positions as required, the downward folding and upward turning functions are met, and a riveting shaft rotatably connected with the stress inclined tube is arranged in the arc-shaped limiting sliding groove and can slide along the arc-shaped limiting sliding groove.

The wheel frame 5 comprises a front wheel frame component 51 and a rear wheel frame component 52, and the front wheel frame component 51 and the rear wheel frame component 52 respectively comprise a bottom pipe 53 and a wheel frame connecting piece 54. The wheel carrier 5 is provided with a front wheel carrier component and a rear wheel carrier component, so that the front wheel carrier component and the rear wheel carrier component can be effectively arranged in a staggered mode, and meanwhile, the front wheel carrier component and the rear wheel carrier component form a stress balance mechanism of the folding bicycle, so that the function of supporting is achieved, and the function of balancing is also achieved.

As shown in fig. 8, the wheel frame connecting member 52 includes a wheel socket 55, a tube chute socket 56 and a bottom tube socket 57, wherein the axis of the wheel socket 55 is vertically arranged, and the axes of the tube chute socket 56 and the bottom tube socket 57 are horizontally arranged and vertically arranged with the axis space of the wheel socket 55; the inner side of the inclined tube socket 56 is horizontally provided with a lower frame adapter shaft 58 which is vertical to the axis of the inclined tube socket. The wheel frame connecting piece 52 is a connecting piece for connecting a wheel, a supporting stress frame, an upper frame and a lower frame, in order to realize reasonable design of stress points, a wheel socket 55 is integrally arranged on the wheel frame connecting piece to facilitate the plug-in connection of the wheel, an inclined tube socket 56 is arranged to meet the plug-in connection of the supporting stress frame and realize the respective design of the stress points, a bottom tube socket 57 is arranged to facilitate the plug-in connection of a bottom tube 53 in a wheel frame 5, the axes of the inclined tube socket 56 and the bottom tube socket 57 are horizontally arranged and are vertically arranged with the axis space of the wheel socket 55, the structure realizes the contract distribution of the stress points in the horizontal and vertical directions, a lower frame switching shaft 58 is horizontally arranged in the inner side of the inclined tube socket and is vertical to the axis of the inclined tube socket, not only is the rotary connection of the lower frame facilitated, but also realizes the balanced arrangement of the force on the upper frame and the inner side of the wheel frame connecting piece, and the balanced arrangement of the force on the lower frame connecting piece effectively increases the integral stability of the folding vehicle.

As shown in fig. 9, the wheel 8 is connected with the wheel socket 55 by an eccentric wheel seat 81 in a plug-in manner, and the eccentric wheel seat 81 and the wheel adapter axis are arranged to be deviated from the axis of the wheel socket; the wheel socket 55 is provided with a containing slot 59, the eccentric wheel seat 81 is provided with a telescopic rod 82, and the telescopic rod 82 is spliced with the wheel socket 55 and is connected with a rotating ball head 83 in a folding way along the containing slot 59; the wheels 8 are of a single-wheel, double-wheel or three-wheel structure. The wheels 8 comprise a front wheel 8a and a rear wheel 8b, and the track of the rear wheel 8b is smaller than the track of the front wheel 8a in this embodiment, so that the rear wheel 8b can be folded to the inner side of the front wheel 8a when folded, and staggered folding can be realized. The wheel 8 is connected with the wheel socket through an eccentric wheel seat 81 in a plug-in card mode, the whole quick replacement of the wheel can be realized, and the wheel can be replaced by wheel structures with different purposes such as double wheels or three wheels and the like according to the requirements, for example, the three-wheel structure can meet the requirement of climbing stairs, the double-wheel structure can meet the pushing requirement of soft ground and the like; the eccentric wheel seat and the wheel switching axis are arranged to deviate from the axis of the wheel socket, so that the stress direction of the wheel always faces to the outer side of the frame, namely the stress direction of the wheel always faces forwards and backwards, and the push-pull is convenient; in order to satisfy the folding car only folding wheel and folding frame's demand not, be provided with on the wheel socket and accomodate fluting 59, the telescopic link is connected and is connected through a rotation axis rotation with the wheel socket plug-in card, the telescopic link can stretch out and draw back from top to bottom in order to realize the regulation of wheel height, can follow simultaneously and accomodate the fluting and upwards fold, thereby make the underframe can place the department with ground or railway carriage etc. in planar mode and contact, when guaranteeing to place the balance, can not appear removing or sliding, the height space has still been saved simultaneously, can satisfy folding car and place at the inside not foldable level of vehicle trunk.

As shown in fig. 10, the pivot assembly 6 includes a U-shaped groove 61 and a hinge 62 disposed inside the U-shaped groove 61; the hinge part 62 is provided with a pipe chute hinge socket 63. A flip cover 64 may also be pivotally attached to the pivot assembly 6. Two ends of the U-shaped groove body 61 are respectively provided with a pivoting hole 65 for pivoting the upper frame. The first upper frame and the second upper frame are respectively connected with the pivot holes 65 through pivot shafts, and the upper ends of the stressed inclined tubes 41 are respectively inserted into the inclined tube hinge sockets 63 to realize coaxial pivot.

The pushing handle 9 is rotatably connected with the wheel carrier through a rotating part 91, and an automatic locking structure is arranged on the rotating part 91, so that the pushing handle can be locked at any angle, and the folding vehicle can be pushed or pulled conveniently. The push rod comprises a grip 92 and an expansion rod 93, and the expansion rod 93 can extend up and down to realize the up-and-down extension of the push handle 9.

The folding method of the folding trolley comprises the following steps:

s1: the switching lifting rod is lifted upwards, the folding linkage structure acts simultaneously, the lower frame, the supporting stress frame and the upper frame are turned downwards simultaneously and are folded towards the center of the switching lifting rod, and the frame main body components are linked and synchronously folded together;

s2: when the frame main body component is folded, the front wheels and the rear wheels are staggered and folded inwards and outwards under the wheel carrier;

s3: the pushing handle is contracted downwards and is closed to the switching lifting rod.

Example 2:

in the embodiment shown in fig. 11 and 12, the technical solution is substantially the same as that of embodiment 1, except that no pivot assembly is provided in this embodiment, and instead: the upper frame 2 and the supporting stress frame 4 are pivoted with each other through a pivoting shaft 66; two groups of the supporting stress frames 4 are symmetrically arranged, each group of the supporting stress frames 4 respectively comprises two stress inclined tubes 41 and two stress pull rods 42, the upper ends of the two stress inclined tubes 41 are coaxially pivoted in an X shape, the upper ends of the two stress inclined tubes are pivoted with the inside and the outside of the upper frame in a staggered manner, namely the upper ends of the two stress inclined tubes are respectively pivoted with the inner side and the outer side of the upper frame, specifically, the stress inclined tubes pivoted with the first frame 21 are pivoted with the inner side of the first frame 21, the stress inclined tubes pivoted with the second frame 22 are pivoted with the outer side of the second frame 22, or the stress inclined tubes pivoted with the first frame 21 are pivoted with the outer side of the first frame 21, the stress inclined tubes pivoted with the second frame 22 are pivoted with the inner side of the second frame 22, the upper end parts of the two stress inclined tubes are provided with horizontal transfer parts 45, and the horizontal transfer parts 45 are rotatably connected with the upper frame through pivot shafts 66; the lower ends of the two stress inclined pipes 41 are respectively provided with a horizontal plug 43, and the horizontal plugs 43 are respectively inserted with the wheel carrier 5; one end of each of the two force-bearing pull rods 42 is connected to the upper frame 2 near the pivot axis, and the other end is connected to the upper end of the force-bearing inclined tube 41 and is located below the coaxial pivot.

The folding vehicle in the embodiment is characterized in that the frame main body assembly mainly comprises an upper frame, a lower frame, a supporting stress frame and a wheel frame which are linked and synchronously folded into a whole, the upper frame, the lower frame, the supporting stress frame and the wheel frame synchronously move in the folding process, the upper frame is connected with the supporting stress frame, the supporting stress frame and the wheel frame are in horizontal butt joint, so that the force is stably transmitted to the wheel frame through the supporting stress frame and is positioned on the outer side of the wheel frame, the lower frame is connected with the wheel frame, the force on the lower frame directly acts on the inner side of the wheel frame, the stress structure of the whole folding vehicle is more reasonably designed, the folding vehicle is more stable in the using process, and the phenomena of side turning and the like caused by unreasonable stress are avoided. This folding car, dislocation set is littleer at folding process storage space around the wheel, it is more convenient to deposit, the axis and the eccentric formula setting of wheel carrier strong point of wheel, make the outside at both ends around the wheel atress direction is towards the frame all the time, the eccentric direction of front and back wheel sets up in reverse, make the atress of wheel all the time in balanced state around the whole folding car, make this folding car no matter all locate balanced state under load or no load state, antedisplacement or retrodisplacement phenomenon can not appear in the folding car, when promoting or pulling folding car, no matter move folding car towards the place ahead or rear, because the eccentric formula structure, it is more convenient to promote, and is laborsaving. This folding car can fold according to the needs of transportation or storage, has greatly reduced the packing volume, is convenient for transport, use and accomodates the storage.

The above embodiments are only a subset of the present invention, and not all embodiments. Meanwhile, based on the embodiments described in the present disclosure, all other embodiments obtained on the basis of the technical solution of the present application should belong to the scope of the present disclosure by those of ordinary skill in the art without creative efforts.

Claims (10)

1. A folding cart, characterized by comprising:

the frame main body assembly (1) is provided with an upper frame (2) and a lower frame (3) which are integrally linked and synchronously folded, a supporting stress frame (4) and a wheel carrier (5) which are connected between the upper frame (2) and the lower frame (3), and the upper frame (2) and the supporting stress frame (4) are mutually pivoted; the lower frame (3) is rotationally connected with the wheel carrier (5), and the supporting stress frame (4) is horizontally connected with the wheel carrier (5); a switching lifting rod (7) for realizing folding and opening is arranged on the lower frame (3);

the wheels (8) are connected to the wheel carrier in a front-back staggered manner, and the axes of the wheels and the wheel carrier supporting points are arranged in an eccentric manner;

the pushing handle (9) is connected to the wheel carrier in a telescopic rotating manner.

2. The folding cart of claim 1, wherein: the upper frame (2) comprises a first frame (21) and a second frame (22) which are symmetrically arranged, and the first frame (21) and the second frame (22) are formed by splicing an edge pipe (10) and an elbow pipe (11) respectively.

3. The folding cart of claim 1, wherein: the lower frame (3) comprises a first grid frame (31) and a second grid frame (32), the first grid frame (31) and the second grid frame (32) are symmetrically arranged by taking the switching lifting rod (7) as a symmetry axis and are rotatably connected to the switching lifting rod (7) through a group of switching assemblies (12).

4. A folding cart in accordance with claim 3, wherein: switching subassembly (12) including first adapter (13) and second adapter (14) with switching shadoof (7) as the pivot, the one end of first adapter (13) be provided with U type adapter (15) other end and be provided with first underframe socket (16 a), the one end of second adapter (14) be provided with arc adapter (17) the other end and be provided with second underframe socket (16 b).

5. The folding cart of claim 1, wherein: the upper frame (2) and the supporting stress frame (4) are mutually pivoted through a pivoting component (6); the two groups of the supporting stress frames (4) are symmetrically arranged, each group of the supporting stress frames (4) respectively comprises two stress inclined tubes (41) and two stress pull rods (42), the upper ends of the two stress inclined tubes (41) are coaxially pivoted with the pivoting component (6), the lower ends of the two stress inclined tubes (41) are respectively provided with a horizontal plug (43), and the horizontal plugs (43) are respectively spliced with the wheel carrier (5); one end of each stressed pull rod (42) is connected with the upper frame (2) close to the pivoting component (6) in a switching way, and the other end of each stressed pull rod is connected with the upper end of the stressed inclined tube (41) in a switching way.

6. The folding cart of claim 5, wherein: the pivoting assembly (6) comprises a U-shaped groove body (61) and a hinge piece (62) arranged in the U-shaped groove body (61); the hinge piece (62) is provided with an inclined tube hinge socket (63).

7. The folding cart of claim 1, wherein: the upper frame (2) and the supporting stress frame (4) are mutually pivoted through a pivoting shaft (66); the supporting stress frames (4) are symmetrically provided with two groups, each group of component supporting stress frame (4) respectively comprises two stress inclined tubes (41) and two stress pull rods (42), the upper ends of the two stress inclined tubes (41) are coaxially pivoted in an X shape, the upper ends of the two stress inclined tubes are pivoted with the upper frame in an inner-outer staggered manner, the upper end parts of the two stress inclined tubes are provided with horizontal switching parts (45), and the horizontal switching parts (45) are rotatably connected with the upper frame through pivoting shafts (66); the lower ends of the two stress inclined pipes (41) are respectively provided with a horizontal plug (43), and the horizontal plugs (43) are respectively spliced with the wheel carrier (5); one end of each stressed pull rod (42) is connected with the upper frame (2) close to the pivot shaft in a switching way, and the other end is connected with the upper end of the stressed inclined tube (41) in a switching way and is positioned below the coaxial pivot joint.

8. The folding cart according to any one of claims 1 to 7, characterized in that: the wheel carrier (5) comprises a front wheel carrier component (51) and a rear wheel carrier component (52), wherein the front wheel carrier component (51) and the rear wheel carrier component (52) respectively comprise a bottom pipe (53) and a wheel carrier connecting piece (54).

9. The folding cart of claim 8, wherein: the wheel frame connecting piece (54) comprises a wheel socket (55), an inclined tube socket (56) and a bottom tube socket (57), wherein the axis of the wheel socket (55) is vertically arranged, and the axes of the inclined tube socket (56) and the bottom tube socket (57) are horizontally arranged and are vertically arranged with the axial space of the wheel socket (55); a lower frame adapter shaft (58) is horizontally arranged on the inner side of the inclined tube socket (56) and is vertical to the axis of the inclined tube socket; the wheel (8) is connected with the wheel socket (55) in a plug-in manner through an eccentric wheel seat (81), and the eccentric wheel seat (81) and the wheel switching axis are arranged to deviate from the axis of the wheel socket (55).

10. The folding cart according to any one of claims 1 to 7, characterized in that: the wheels (8) are in a single-wheel, double-wheel or three-wheel structure.

Images