CN208746046U

CN208746046U - Folding hand pushing tricycle

Info

Publication number: CN208746046U
Application number: CN201821425395.XU
Authority: CN
Inventors: 罗耀球
Original assignee: Foshan Medical Equipment Co Ltd
Current assignee: Foshan Medical Equipment Co Ltd
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2019-04-16
Anticipated expiration: 2028-08-31

Abstract

Folding hand pushing tricycle, including front fork, two crossbeams, with two vertical beams, rear-wheel is installed on the vertical interconnecting piece of rear side on crossbeam, a swivel base is fixed on the vertical interconnecting piece of front side, rotation cooperating portion is additionally provided on swivel base, rotation cooperating portion includes multiple mating flanges along short transverse arrangement, the interlaced arrangement of multiple mating flanges on two swivel bases, and a through-hole is provided on two mating flanges on swivel base, one clamping screw from top to bottom sequentially passes through through-hole and attachment base on multiple mating flanges, one locking nut is screwed onto the bottom end of clamping screw and is connected to the bottom surface of attachment base；The limiting stand terrace positioned at mating flanges outer ledge is provided on each swivel base, two limiting stand terraces on two swivel bases collectively constitute a position-limit mechanism；The hand pushing tricycle further includes a latch assembly.The utility model improves the portability of hand pushing tricycle.

Description

Folding hand pushing tricycle

Technical field

The utility model relates to a kind of trolleys, and in particular to a kind of folding hand pushing tricycle.

Background technique

Current hand pushing tricycle is usually a preposition front-wheel, and two rear-wheels are separately mounted to vehicle frame two sides, front-wheel As deflecting roller, two rear-wheels are then used to support vehicle frame, to keep vehicle frame to balance.For the ease of carrying, some hand pushing tricycles are logical Be often using a kind of folded bicycle disclosed in folding structure, such as patent US15836443, when folding, unclamp front fork with The locking device of crossbeam, front fork is foldd backward, and is folded in front fork on crossbeam, and two wheels of rear side are overturn forward, folding with The two sides of crossbeam, although this folded bicycle has lesser volume after it can be made to fold, due to the width of rear side two-wheeled It failing to change, the car width after leading to folding is larger, i other words, in a folded configuration, due to failing to change car two Spacing between a rear-wheel leads to still have biggish width when car folding state, is unfavorable for improving the portability of folded bicycle.

Utility model content

In view of the deficiencies of the prior art, the purpose of this utility model is intended to provide a kind of folding hand pushing tricycle, It can be such that two rear-wheels draw close after folding, then reduce the width of its folding state, improve the portability of folded bicycle.

To achieve the above objectives, the present invention adopts the following technical solutions:

Folding hand pushing tricycle, it is perpendicular including front fork, two crossbeams and be connected on two crossbeams two Beam, front fork include the attachment base being located at the top of it and two linking arms extended separately down by connection seat both sides, two connections Front-wheel is installed between arm；Two crossbeams are C-shaped, each crossbeam includes two and is located at its both ends and along short transverse Extend vertical interconnecting piece and the linkage section between two vertical interconnecting pieces, the vertical interconnecting piece of rear side is located on crossbeam On rear-wheel be installed, be fixed with a swivel base on the vertical interconnecting piece of front side, be provided on each swivel base along height side To the mounting hole of extension, the vertical interconnecting piece on front side of crossbeam, which is worn, to be connect in the mounting hole, and rotation cooperating portion is additionally provided on swivel base, Rotation cooperating portion includes multiple mating flanges along short transverse arrangement, the interlaced row of multiple mating flanges on two swivel bases Cloth, and a through-hole is provided on the mating flanges on two swivel bases, it is convex that a clamping screw from top to bottom sequentially passes through multiple cooperations Through-hole and attachment base on edge, a locking nut are screwed onto the bottom end of clamping screw and are connected to the bottom surface of attachment base；Often The limiting stand terrace positioned at mating flanges outer ledge is provided on one swivel base, two limiting stand terraces on two swivel bases are total The two swivel bases position-limit mechanism that outside rotates towards each other is prevented when the two limited steps face paste is closed with composition one；The hand push three Wheel vehicle further includes a latch assembly, and the latch assembly is for preventing two swivel bases from rotating toward each other.

The edge setting of mating flanges is fluted.

The outer peripheral edge of mating flanges is arc-shaped, and a detent slot, the bottom wall of detent slot are formed between adjacent two mating flanges It is same arc-shaped, and the projection that the outer peripheral edge of mating flanges is formed in the horizontal plane, with the bottom wall of detent slot shape in the horizontal plane At projection surround jointly one closure circle.

The ellipsoidal cross section of mounting hole, it is equally in ellipse for wearing on crossbeam and connecing the cross section of the vertical interconnecting piece in mounting hole Circle is provided with the bolt hole for crossing mounting hole on swivel base, the fixing bolt of vertical interconnecting piece is provided through in bolt hole.

It is provided with the first connection sheet on one of crossbeam, the second connection sheet, the first connection are provided on another crossbeam Piece and the second connection sheet are rotatably connected by a pivotal part.

Vertical beam is L-shaped, and bottom is fixedly connected on the joining place of the linkage section and the vertical interconnecting piece for being located at front side of crossbeam, The top of vertical beam is fixed with handle.

The hand pushing tricycle further includes having a folding basketry or shopping bag, and the two sides of basketry or shopping bag mount respectively On two vertical beams.

The hand pushing tricycle further includes brake assemblies, brake assemblies include brake steel cable, cover rope outside brake steel cable Set, support plate, reset spring, brake block and brake hand handle, the rotatable mounting knob lower section of brake hand handle, are used to turn One end activity of brake steel cable is pulled when dynamic, support plate is fixedly connected on vertical beam, is rotatably coupled in the middle part of brake block In support plate, one end, which is formed, forms a mounting part with the friction portion of rear-wheel cooperation, the other end, and the other end of the steel cable that brakes is from rope Mounting part is covered and is connected to after passing through support plate, rope sling is limited above support plate far from one end of brake hand handle, spring It is clamped between support plate and mounting part.

The cross section of linkage section is ellipse, and the cross section positioned at the vertical interconnecting piece of rear side is circle, linkage section and position In the joining place smooth transition of the vertical interconnecting piece of rear side.

Latch assembly includes first connecting rod, second connecting rod, shaft and tension spring, one end of first connecting rod hingedly wherein one On a crossbeam, one end of second connecting rod is hinged on another crossbeam, and the other end of first connecting rod and second connecting rod passes through shaft Rotatable connection, is provided with limit baffle of the backstop on front side of second connecting rod on front side of first connecting rod, before first connecting rod Side protrusion is provided with first connecting portion, and the front side protrusion of second connecting rod is provided with second connecting portion, the both ends difference of tension spring It is articulated in first connecting portion and second connecting portion.

The utility model has the beneficial effects that:

Compared with the prior art, the two crossbeam front ends of the utility model are rotatably connected by two swivel bases, and at this Two swivel bases are connected directly between on front fork, in this way, draw close two crossbeams when needing to fold, can make two crossbeam rear ends Two rear-wheels are drawn close, and realize the folding of hand pushing tricycle, after folding, since two rear-wheels are drawn close, have lesser width ruler It is very little, to improve the portability of hand pushing tricycle.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the scheme of installation of the utility model；

Fig. 3 is swivel base and front fork scheme of installation；

Fig. 4 is the mated condition schematic diagram of two swivel bases；

Fig. 5 is the enlarged view in Fig. 2 at B；

Fig. 6 is the enlarged view in Fig. 2 at A；

Fig. 7 is the structural schematic diagram of latch assembly.

Specific embodiment

In the following, being further described in conjunction with the drawings and specific embodiments to the utility model:

It is a kind of folding hand pushing tricycle of the utility model comprising front fork as shown in Fig. 1,2,3,4,5,6 10,13, two, front-wheel, 20, two, crossbeam vertical beam 30 and two rear-wheels 21, two vertical beams 30 are respectively fixedly connected in two crossbeams On 20；Front fork 10 includes the attachment base 11 and two linking arms 12 at the top of it, and two linking arms 12 are respectively by attachment base 11 Two sides extend downwardly, and front-wheel 13 is articulated in by wheel shaft the lower end of linking arm 12 between two linking arms 12, Two crossbeams 20 are in the C-shaped of a back-off, each crossbeam 20 can regard three-stage structure as, specifically, in crossbeam 20 Both ends be respectively two vertical interconnecting pieces extended along short transverse, part between two vertical interconnecting pieces is a connection Section, the linkage section are substantially in a horizontal state extension, are also possible to be obliquely installed gradually downward from the front to the back, in short, two crossbeam The 20 main load bearing component as entire tricycle installs rear-wheel 21 on the vertical interconnecting piece for being located at rear side.Two 20, crossbeams Vertical interconnecting piece in front side is mutually drawn close, and the distance between two crossbeams 20 are gradually increased from the front to the back, so that two crossbeams The vertical interconnecting piece of 20 rear sides distinguishes certain distance, that is, can guarantee that two rear-wheels 21 are spaced a distance, so that it is guaranteed that tricycle Stationarity.Swivel base 22 and swivel base 23, swivel base 22 and swivel base 23 are separately installed on the vertical interconnecting piece of two crossbeams, 20 front side Structure it is identical, introduced by taking swivel base 22 as an example herein, offered on swivel base 22 one along short transverse extend mounting hole 221, the vertical interconnecting piece of one of 20 front side of crossbeam is plugged on the mounting hole 221, so that swivel base 22 is fixed on the crossbeam 20 Front side, be additionally provided with rotation cooperating portion on swivel base 22, the rotation cooperating portion include along short transverse arrangement multiple cooperations it is convex Edge 222, and a through-hole 223 is respectively provided on mating flanges 222, the through-hole on multiple mating flanges 222 is protected in the height direction Hold it is consistent, i.e., it is axial identical to itself and aperture；During installation, more on multiple mating flanges 232 on swivel base 23 and swivel base 22 A interlaced arrangement of mating flanges, a clamping screw 24 from top to bottom pass through through-hole 223 and cooperation on mating flanges 222 After through-hole 233 on flange 232, preset through-hole on attachment base 11 is passed through, locking screw is then locked at by a locking nut The bottom of bolt 24, the locking nut are resisted against the bottom surface of attachment base 11 after screwing, in this way, by front fork 10, swivel base 22 and turning Seat 23 connects, and swivel base 22 and swivel base 23 can be rotated with the central axis of clamping screw 24 relative to front fork 10.In addition, turning The limiting stand terrace 226 positioned at mating flanges outer ledge is additionally provided on seat 22, corresponding, swivel base 23 is also equipped with positioned at it The limiting stand terrace 236 of 232 outer ledge of defining flange, limiting stand terrace 226 and limiting stand terrace 236 collectively constitute a limit Position mechanism, the position-limit mechanism can prevent swivel base 22 and swivel base 23 outside towards each other when two limiting stand terraces are bonded to each other Rotation, that is to say, that when tricycle is in unfolded state, two limiting stand terraces can prevent two swivel bases from continuing towards the two Between angle increase direction rotation so that in this state, two swivel bases only have the freedom degree rotated toward each other.Certainly, exist Under unfolded state, two swivel bases are inwards rotated in order to prevent, and the utility model also sets up a latch assembly, latch assembly installation It between two crossbeams 20 or is mounted between two vertical beams 30, the freedom degree rotated toward each other for limiting above-mentioned two swivel base, when When needing folding, the latch assembly can be operated, it is made to discharge the freedom degree, thus by the inside side oscillation of two crossbeam 20, make its two 20 draw close, and then draw close two rear-wheels 21.

Specifically, above-mentioned latch assembly includes first connecting rod 61, second connecting rod 62, shaft 63 and tension spring 64, first connects One end of bar 61 is hinged on one of crossbeam 20, and one end of second connecting rod 62 is hinged on another crossbeam 20, and first connects The other end of bar 61 and second connecting rod 62 by shaft 63 rotatably connect, the front side of first connecting rod 61 be provided with a backstop in The limit baffle 611 of 62 front side of second connecting rod, the front side protrusion of first connecting rod 61 are provided with first connecting portion 612, and second connects The front side protrusion of bar 62 is provided with second connecting portion 621, and the both ends of tension spring 64 are articulated in first connecting portion 612 and second respectively On interconnecting piece 621, in unfolded state, since first connecting portion 612 protrudes from the front side setting of first connecting rod 61, When tension spring 64 tenses first connecting portion 612 and second connecting portion 621, the elastic stress generated, and cooperate limit baffle 611 To the backstop action of second connecting rod 62, the latch assembly 60 made is maintained at unfolded state in the effect not by external force, when When needing to fold, then first connecting rod 61 and second connecting rod 62 is pushed forward by the part that shaft 63 connects, extends tension spring, At this point, latch assembly can be released to the locking of two crossbeams 20, the i.e. locking to swivel base 22 and swivel base 23, to enable tricycle Enough foldings, in some handicapped old men in use, only needing to connect first connecting rod 61 and second connecting rod 62 using knee Locate pushing tow forward, folding process can be completed.

In order to mitigate the weight of swivel base 22 Yu swivel base 23, conducive to the lightweight of hand pushing tricycle, on the side of mating flanges 222 Edge setting fluted 224, the edge of mating flanges 232 is similarly arranged fluted 234.The outer peripheral edge of mating flanges 222 is in arc Shape forms a detent slot between adjacent two mating flanges 222, and the bottom wall of detent slot is equally arc-shaped, and mating flanges 222 The projection that outer peripheral edge is formed in the horizontal plane, the projection formed in the horizontal plane with the bottom wall of detent slot surround a closure jointly Circle, likewise, mating flanges 232 are identical as the above-mentioned structure of mating flanges 222, so that it is guaranteed that mating flanges 222 with Mating flanges 232 can be rotated freely when mutual interspersed.

In the utility model, by swivel base 22 mounting hole 221 and the section of the mounting hole 231 on swivel base 23 be set as ellipse The cross section of circle, the vertical interconnecting piece of 20 front side of crossbeam is also set to ellipse, in this way, will be vertical on front side of crossbeam 20 After interconnecting piece is inserted into mounting hole 221 and mounting hole 231, it can effectively prevent crossbeam 20 from relatively rotating with swivel base, into one Step, it is additionally provided with the bolt hole 225 for crossing mounting hole 221 on swivel base 22, is provided on swivel base 23 and crosses mounting hole 231 Bolt hole 235 is provided with the fixing bolt across vertical interconnecting piece in bolt hole 231 and bolt hole 235.Certainly, above-mentioned Mounting hole and the cross section of vertical interconnecting piece be not limited in ellipse, can also be rectangular or other can limit phase To the shape of rotational freedom.

It is provided with the first connection sheet 25 on a crossbeam 20 wherein, is provided with the second connection sheet on another crossbeam 20 26, the first connection sheet 25 and the second connection sheet 26 are rotatably connected by a pivotal part, which is a bolt 27, utilize spiral shell Bolt 27 wears the through-hole connect in the first connection sheet 25 and the second connection sheet 26, and the two is pivotally connected, and utilizes the nut on bolt 27 Limit about 26 relative motion of the first connection sheet 25 and the second connection sheet.

In the utility model, vertical beam 30 is L-shaped, and bottom is fixedly connected on the linkage section of crossbeam 20 and erecting positioned at front side The joining place of direct-connected socket part, the top of vertical beam 30 are fixed with handle 31, in this way, when pushing tricycle, it can be ensured that tricycle It is more steady, while in the utility model, the linkage section of 20 middle section of crossbeam can be stretching structure, and user can basis The service condition of itself is adjusted, to meet the needs of personalized.Certainly, the hand pushing tricycle of the utility model can also wrap A folding basketry 90 is included, the two sides of basketry 90 are articulated in respectively on two vertical beams 30, and the folding of the basketry 90, which can be, to be based on Flexible material is made, naturally it is also possible to be other structures, for example, flexible joint is arranged in the middle part of basketry, be also possible to utilize One shopping bag replaces above-mentioned basketry 90.

The hand pushing tricycle of the utility model further includes brake assemblies, and brake assemblies include brake steel cable 42, cover and braking Rope sling 41, support plate 43, reset spring 44, brake block 45 and brake hand handle 32 outside steel cable 42, brake hand handle 32 can turn Dynamic 31 lower section of mounting knob, is used to pull one end activity of brake steel cable 42 in rotation, and support plate 43 is fixedly connected on On vertical beam 20, the middle part of brake block 45 is rotatably coupled in support plate 43, and one end forms the friction portion with rear-wheel cooperation 452, the other end forms a mounting part 451, and the other end for the steel cable 42 that brakes is connected to from rope sling 41 and after passing through support plate 43 Mounting part 451, rope sling 42 is limited at 43 top of support plate far from one end of brake hand handle 32, the specific can be that passing through one Rope sling 42 is fixed in support plate 43 by nut 46；Spring 44 is clamped between support plate 43 and mounting part 451, when needing to stop Che Shi dials up brake hand handle 32, and brake steel cable 42 is driven to move upwards relative to rope sling 41, and the steel cable 42 that brakes at this time drives Mounting part 451 moves upwards, and rotates brake block 45, contacts friction portion 452 with wheel and rubs and generate brake force, when When the external force of release brake hand handle 32, the downward pushing tow in mounting part 451 resets brake block 45 by spring.

For the ease of the installation of brake assemblies, in the utility model, crossbeam 20 is arranged to variable cross-section, for example, being located at The section of the vertical interconnecting piece of front side is arranged to ellipse, intermediate linkage section due to being arranged telescoping mechanism, section also by It is set as ellipse, and in the part of the vertical interconnecting piece of rear side and linkage section transition, then it is set to variable cross-section, is had Body be section by ellipse smooth transition is circle, keeps the section of the vertical interconnecting piece of rear side rounded, in this way, making brake group Part can easily be mounted and ensure the fastness of brake assemblies.

The two crossbeam front ends of the utility model are rotatably connected by two swivel bases, and are connected directly between in two swivel base On front fork, in this way, draw close two crossbeams when needing to fold, two rear-wheels of two crossbeam rear ends can be made to draw close, realized The folding of hand pushing tricycle since two rear-wheels are drawn close, has lesser width size, to improve hand push after folding The portability of tricycle.

Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality Example is applied the utility model is described in detail, those skilled in the art should understand that, it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features, and these It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution It encloses.

Claims

1. folding hand pushing tricycle, including front fork, two crossbeams and two vertical beams being connected on two crossbeams, It is characterized in that, front fork includes the attachment base being located at the top of it and two connections extended separately down by connection seat both sides Arm is equipped with front-wheel between two linking arms；Two crossbeams are C-shaped, each crossbeam include two be located at its both ends and Extend vertical interconnecting piece and the linkage section between two vertical interconnecting pieces along short transverse, positioned at rear side on crossbeam Rear-wheel is installed on vertical interconnecting piece, is fixed with a swivel base on the vertical interconnecting piece of front side, is respectively provided on each swivel base There is the mounting hole extended along short transverse, the vertical interconnecting piece on front side of crossbeam, which is worn, to be connect in the mounting hole, is additionally provided on swivel base Rotation cooperating portion, rotation cooperating portion include multiple mating flanges along short transverse arrangement, multiple mating flanges on two swivel bases Interlaced arrangement, and a through-hole is provided on the mating flanges on two swivel bases, a clamping screw from top to bottom sequentially passes through Through-hole and attachment base on multiple mating flanges, a locking nut are screwed onto the bottom end of clamping screw and are connected to attachment base Bottom surface；The limiting stand terrace positioned at mating flanges outer ledge is provided on each swivel base, two limits on two swivel bases Position step surface, which collectively constitutes one, prevents the two swivel bases position restrainer that outside rotates towards each other when the two limited steps face paste is closed Structure；The hand pushing tricycle further includes a latch assembly, and the latch assembly is for preventing two swivel bases from rotating toward each other.

2. folding hand pushing tricycle as described in claim 1, which is characterized in that the edge of mating flanges is provided with recessed Slot.

3. folding hand pushing tricycle as described in claim 1, which is characterized in that the outer peripheral edge of mating flanges is arc-shaped, A detent slot is formed between adjacent two mating flanges, the bottom wall of detent slot is equally arc-shaped, and the outer peripheral edge of mating flanges exists The projection formed on horizontal plane surrounds the circle of a closure with the projection that the bottom wall of detent slot is formed in the horizontal plane jointly.

4. folding hand pushing tricycle as described in claim 1, which is characterized in that the ellipsoidal cross section of mounting hole, it is horizontal Worn on beam connect the vertical interconnecting piece in mounting hole cross section it is equally oval, the spiral shell for crossing mounting hole is provided on swivel base Keyhole is provided through the fixing bolt of vertical interconnecting piece in bolt hole.

5. folding hand pushing tricycle as described in claim 1, which is characterized in that be provided with first on one of crossbeam Connection sheet, the second connection sheet, the first connection sheet and the second connection sheet are provided on another crossbeam can be rotated by a pivotal part Connection.

6. folding hand pushing tricycle as described in claim 1, which is characterized in that vertical beam is L-shaped, and bottom is fixedly connected In the joining place of the linkage section and the vertical interconnecting piece for being located at front side of crossbeam, the top of vertical beam is fixed with handle.

7. folding hand pushing tricycle as claimed in claim 6, which is characterized in that the hand pushing tricycle further includes that have one can The two sides of the basketry or shopping bag of folding, basketry or shopping bag are articulated in respectively on two vertical beams.

8. folding hand pushing tricycle as claimed in claim 6, which is characterized in that the hand pushing tricycle further includes brake group Part, brake assemblies include brake steel cable, cover brake steel cable outside rope sling, support plate, reset spring, brake block and brake Hand handle, the rotatable mounting knob lower section of brake hand handle, is used to pull one end activity of brake steel cable, support plate in rotation It is fixedly connected on vertical beam, is rotatably coupled in support plate in the middle part of brake block, one end formation rubs with what rear-wheel cooperated Wiping portion, the other end form a mounting part, and the other end for the steel cable that brakes is connected to mounting part from rope sling and after passing through support plate, restricts Set is limited above support plate far from one end of brake hand handle, and spring is clamped between support plate and mounting part.

9. folding hand pushing tricycle as claimed in claim 8, which is characterized in that the cross section of linkage section is ellipse, Cross section positioned at the vertical interconnecting piece of rear side is circle, and the joining place of linkage section and the vertical interconnecting piece for being located at rear side is smoothed It crosses.

10. folding hand pushing tricycle as described in claim 1, which is characterized in that latch assembly includes first connecting rod, the Two connecting rods, shaft and tension spring, one end of first connecting rod are hinged on one of crossbeam, and one end of second connecting rod is hinged on separately On one crossbeam, the other end of first connecting rod and second connecting rod is rotatably connected by shaft, the front side setting of first connecting rod There is limit baffle of the backstop on front side of second connecting rod, the front side protrusion of first connecting rod is provided with first connecting portion, and second connects The front side protrusion of bar is provided with second connecting portion, and the both ends of tension spring are articulated in first connecting portion and second connecting portion respectively.