CN107628173B - Folding tricycle - Google Patents
Folding tricycle Download PDFInfo
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- CN107628173B CN107628173B CN201710999234.5A CN201710999234A CN107628173B CN 107628173 B CN107628173 B CN 107628173B CN 201710999234 A CN201710999234 A CN 201710999234A CN 107628173 B CN107628173 B CN 107628173B
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- bar linkage
- folder
- tricycle
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Abstract
The invention discloses a folding tricycle, which has an unfolding state and a folding state, and comprises: a front fork; a handle bar vertical tube and a front wheel arranged on the front fork; a rear wheel support; locate the rear wheel of rear wheel support both sides portion, the tricycle is still including the folding leg of being connected between front fork and rear wheel support, and the folding leg includes: a first four-bar linkage connected with the front fork; the second four-bar linkage is connected with the rear wheel bracket; the folder is connected between the first four-bar linkage mechanism and the second four-bar linkage mechanism and has a locking state and an unlocking state, and when the folder is in the locking state, the first four-bar linkage mechanism and the second four-bar linkage mechanism are relatively fixed, so that the tricycle is in an unfolding state; when the folder is in the unlocking state, the first four-bar linkage mechanism and the second four-bar linkage mechanism can rotate relatively, and the tricycle is in the folding state by rotating the first four-bar linkage mechanism and/or the second four-bar linkage mechanism.
Description
Technical Field
The invention relates to the technical field of children's vehicles, in particular to a folding tricycle.
Background
The existing children tricycle comprises a front fork, a front wheel arranged at the lower part of the front fork, a handlebar arranged on the front fork and capable of controlling the steering of the front wheel, a frame body extending along the front-back direction, a saddle and pedals arranged on the frame body, a rear wheel frame arranged on the frame body, and rear wheels arranged on two sides of the rear wheel frame. In order to improve the riding comfort, the child tricycle is additionally provided with the backrest, so that the tricycle is large in overall size and inconvenient to carry.
For some foldable tricycles in the prior art, the tricycle can be folded only at a front fork, and a frame is still a whole, so that the foldable children tricycle still occupies a large space after being folded.
In addition, patent No. CN105480342A discloses a foldable tricycle for children and a folding method thereof, wherein a tricycle body frame of the tricycle includes a head tube disposed above a front fork, an upper connecting rod assembly rotatably connected to the head tube, a lower connecting rod assembly rotatably connected to the head tube, a push rod assembly connected to the rear portions of the upper connecting rod assembly and the lower connecting rod assembly, and a support rod rotatably connected between the upper connecting rod assembly and the lower connecting rod assembly and located in front of the push rod assembly, the upper connecting rod assembly, the head tube, the lower connecting rod assembly and the support rod form a four-bar mechanism, and frame folding is achieved by four-bar folding by configuring the tricycle body frame into the four-bar mechanism. Although the frame of the tricycle can be folded, the volume of the folded structure is still large, and the structure is complex.
In view of the above-mentioned drawbacks, the present designer actively makes research and innovation to create a foldable tricycle with a novel structure, so that the foldable tricycle has more industrial utility value.
Disclosure of Invention
The invention aims to provide a folding tricycle with smaller volume after being folded.
In order to achieve the purpose, the invention adopts the following technical scheme:
a folding tricycle having an extended position and a folded position, the tricycle comprising:
a front fork;
the handlebar vertical pipe and the front wheel are arranged on the front fork;
a rear wheel support;
a rear wheel arranged on two side parts of the rear wheel bracket,
the tricycle is still including connecting the front fork with the folding leg between the rear wheel support, the folding leg includes:
a first four-bar linkage connected with the front fork;
the second four-bar linkage is connected with the rear wheel bracket;
the folder is connected between the first four-bar linkage mechanism and the second four-bar linkage mechanism and has a locking state and an unlocking state, and when the folder is in the locking state, the first four-bar linkage mechanism and the second four-bar linkage mechanism are relatively fixed, so that the tricycle is in a unfolding state; when the folder is in an unlocked state, the first four-bar linkage mechanism and the second four-bar linkage mechanism can rotate relatively, and the tricycle is in a folded state by rotating the first four-bar linkage mechanism and/or the second four-bar linkage mechanism.
Further, the first four-bar linkage comprises a first connecting piece, a first connecting rod and a second connecting rod, wherein,
the first connecting piece is arranged on the front fork;
the first connecting rod is parallel to the second connecting rod up and down, one end of the first connecting rod corresponding to the second connecting rod is rotatably connected with the first connecting piece, and the other end of the first connecting rod corresponding to the second connecting rod is rotatably connected with the folder.
Further, the second four-bar linkage comprises a second connecting piece, a saddle frame and a main frame, wherein,
the second connecting piece is rotationally connected to the rear wheel bracket;
the saddle seat frame is vertically parallel to the main frame and is respectively opposite to the first connecting rod and the second connecting rod, one end of the saddle seat frame corresponding to the main frame is rotatably connected with the folder, the other end of the saddle seat frame is rotatably connected with the rear wheel bracket, and the other end of the main frame is rotatably connected with the second connecting piece.
Furthermore, the folder comprises two side plates, a frame-shaped inner shell, a slide block, a draw hook, a pin, a tension spring, a locking piece and a limiting pin, wherein,
the two side plates are oppositely arranged and are connected with the tops of the two side plates through a shaft rod;
the inner shell is fixed between the two side plates, and a pull rope opening is formed in the top of the inner shell;
the sliding block is arranged in the inner shell and is in sliding fit with the boss at the bottom of the inner shell, and the sliding block is provided with a kidney-shaped groove in sliding fit with the pin and a first inclined plane abutting against the locking piece;
the draw hook is fixed on the sliding block and faces the opening;
the pin is inserted into the kidney-shaped groove and is in sliding fit with the kidney-shaped groove, when the folder is in a locked state, the pin tightly clamps the opposite end parts of the second connecting rod and the main frame, and when the folder is in an unlocked state, the pin is staggered with the opposite end parts of the second connecting rod and the main frame;
one end of the tension spring is connected with the pin, and the other end of the tension spring is connected with the bottom of the inner shell;
one end of the locking piece is rotatably connected with the top of the inner shell, the other end of the locking piece is provided with a second inclined surface which is abutted against the first inclined surface, and the second inclined surface is provided with a stop block which can be abutted against the pin;
the limiting pin is inserted into the side part of the inner shell and used for limiting the rotation amplitude of the locking piece.
Furthermore, the opposite end parts of the second connecting rod and the main frame are arc-shaped clamping parts, grooves are concavely formed in the edge of each clamping part, when the folder is in a locking state, the pins are clamped in the grooves corresponding to the clamping parts, and the stop blocks abut against the pins; when the folder is in the unlocked state, the pin is offset from each of the recesses and passes over the stop.
Furthermore, two all be connected with the apron on the curb plate, two the apron is used for the parcel the scray.
Furthermore, the main frame is connected with a pedal and a claw, wherein,
the pedal rod of the pedal is rotationally connected to the main frame through a rotating shaft;
the jack catch is located pedal rear side is used for pressing from both sides tightly the pedal pole, just the jack catch with be connected with the torsional spring between the pivot.
Furthermore, a telescopic push rod is connected to the second connecting piece, and a sunshade is connected to the push rod.
Furthermore, a backrest is arranged on the rear wheel support, a third connecting rod is arranged on the backrest, one end of the third connecting rod is rotatably connected with the backrest, and the other end of the third connecting rod is rotatably connected with the push rod.
Furthermore, a basket is arranged on the handlebar vertical pipe.
The beneficial effects of the invention are as follows: the tricycle is unfolded or folded by arranging the frame into the two four-bar mechanisms and rotationally connecting the folder with the two four-bar mechanisms and locking or unlocking the folder, and the tricycle is folded in half and has a small volume after being folded.
Drawings
FIG. 1 is a schematic structural view of a tricycle according to an embodiment of the present invention in an expanded state;
FIG. 2 is a schematic view of a connection structure of a folding leg and a rear wheel bracket in a tricycle according to an embodiment of the present invention;
FIG. 3 is an exploded view of the attachment of a folding leg to a rear wheel frame in a tricycle according to an embodiment of the present invention;
FIG. 4 is a schematic view of a folder in a tricycle according to an embodiment of the present invention;
FIG. 5 is a schematic view of a portion of a folder in a tricycle in accordance with an embodiment of the present invention;
fig. 6 is a schematic structural view of a folded state of a tricycle according to an embodiment of the present invention.
In the figure: 10-front fork, 11-handle bar stem, 12 front wheel, 13-basket, 20-rear wheel support, 21-rear wheel, 22-backrest, 23-third link, 31-first link, 32-first link, 33-second link, 34-limit staple, 41-second link, 42-saddle frame, 43-main frame, 44-clamping part, 45-groove, 46-limit groove, 50-folder, 51-side plate, 52-inner shell, 53-slider, 54-draw hook, 55-pin, 56-tension spring, 57-lock, 58-limit pin, 59-opening, 60-boss, 61-kidney groove, 62-stop, 63-cover plate, 71-pedal, 72-claw, 73-shaft, 74-torsion spring, 80-push rod, 81-sunshade.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 6, the foldable tricycle of the present invention has an unfolded state and a folded state, and includes a front fork 10, a handle stem 11 and a front wheel 12 provided on the front fork 10, a rear wheel bracket 20, a rear wheel 21 provided on both sides of the rear wheel bracket 20, and a folding frame connected between the front fork 10 and the rear wheel bracket 20, the folding frame including a first four-bar linkage connected to the front fork 10, a second four-bar linkage connected to the rear wheel bracket 20, and a folder 50 connected between the first four-bar linkage and the second four-bar linkage, the folder 50 having a locked state and an unlocked state, and when the folder 50 is in the locked state, the first four-bar linkage and the second four-bar linkage are relatively fixed, so that the tricycle is in the unfolded state; when the folder 50 is in the unlocked state, the first four-bar linkage mechanism and the second four-bar linkage mechanism can rotate relatively, and the tricycle is in the folded state by rotating the first four-bar linkage mechanism and the second four-bar linkage mechanism.
Specifically, the first four-bar linkage mechanism comprises a first connecting piece 31, a first connecting rod 32 and a second connecting rod 33, wherein the first connecting piece 31 is installed on the front fork 10, the first connecting rod 32 is vertically parallel to the second connecting rod 33, one ends of the first connecting rod 32 corresponding to one end of the second connecting rod 33 are rotatably connected with the first connecting piece 31, and the other ends of the first connecting rod 32 corresponding to the other ends of the second connecting rod 33 are rotatably connected with the folder 50; the second four-bar linkage comprises a second connecting piece 41, a saddle seat frame 42 and a main frame 43, wherein the second connecting piece 41 is rotatably connected on the rear wheel bracket 20, the saddle seat frame 42 is vertically parallel to the main frame 43 and respectively opposite to the first connecting rod 32 and the second connecting rod 33, one ends of the saddle seat frame 42 corresponding to the main frame 43 are rotatably connected with the folder 50, the other end of the saddle seat frame 42 is rotatably connected with the rear wheel bracket 20, and the other end of the main frame 43 is rotatably connected with the second connecting piece 41.
The folder 50 comprises two side plates 51, a frame-shaped inner shell 52, a sliding block 53, a draw hook 54, a pin 55, a tension spring 56, a locking piece 57 and a limiting pin 58, wherein the two side plates 51 are oppositely arranged and are connected with the tops of the two side plates through a shaft rod; the inner shell 52 is fixed between the two side plates 51, and the top of the inner shell 52 is provided with a pull rope opening 59; the sliding block 53 is arranged in the inner shell 52 and is in sliding fit with a boss 60 at the bottom of the inner shell 52, and the sliding block 53 is provided with a kidney-shaped groove 61 in sliding fit with the pin 55 and a first inclined surface abutting against the locking piece 57; the draw hook 54 is fixed on the slide block 53 and faces the opening 59; the pin 55 is inserted into the kidney-shaped groove 61 and is in sliding fit with the kidney-shaped groove 61, when the folder 50 is in a locking state, the pin 55 clamps the opposite end parts of the second connecting rod 33 and the main frame 43, and the pin 55 is staggered with the opposite end parts of the second connecting rod 33 and the main frame 43; one end of a tension spring 56 is connected with the pin 55, and the other end is connected with the bottom of the inner shell 52; one end of the locking piece 57 is rotatably connected with the top of the inner shell 52, the other end of the locking piece has a second inclined surface which is abutted against the first inclined surface, and the second inclined surface is provided with a stop block 62 which can stop the pin 55; a stopper pin 58 is inserted through the side of the inner case 52 to limit the rotation range of the locking member 57.
In order to enable the first four-bar linkage mechanism and the second four-bar linkage mechanism to be relatively fixed when the folder 50 is in a locked state and to be relatively rotatable when the folder is in an unlocked state, the opposite end parts of the second connecting rod 33 and the main frame 43 are arc-shaped clamping parts 44, the clamping parts 44 are concavely provided with grooves 45 along the edges, when the folder 50 is in the locked state, pins 55 are clamped in the grooves 45 corresponding to the clamping parts 44, and the stop blocks 62 press the pins 55, so that the first four-bar linkage mechanism and the second four-bar linkage mechanism are relatively fixed; when the folder 50 is in the unlocked state, the pins 55 are offset from the respective grooves 45 and clear the stops 62.
The working principle of the folder 50 of the present invention is: when the bottom of the sliding block 53 is positioned at the bottom of the inner shell 52 and the pin 55 is positioned at the top of the kidney-shaped groove 61, at this time, the pin 55 is clamped in the groove 45 corresponding to each clamping part 44, the block 62 presses against the pin 55, the second connecting rod 33 and the main frame 43 are clamped, and cannot rotate around the folder 50, so that the tricycle is in an unfolded state; the pulling force is exerted on the pulling rope on the pulling hook 54, the pulling hook 54 drives the sliding block 53 to slide along the boss 60, the sliding block 53 pushes the second inclined surface of the locking piece 57 outwards in the sliding process, the locking piece 57 is enabled to rotate, the sliding block 53 continues to slide until the pin 55 abuts against the bottom of the kidney-shaped groove 61, the pin 55 is driven to be separated from the groove 45 corresponding to each clamping part 44, at the moment, the second connecting rod 33 and the main frame 43 can rotate around the folder 50, the first four-bar linkage mechanism and/or the second four-bar linkage mechanism are/is rotated, and the tricycle can be in a folded state. The tension spring 56 plays the role of: in the locked state, the pins 55 are tightly engaged with the corresponding grooves 45 of the engaging portions 44; in the unlocked state, the pin 55 is pulled to restrict the slider 53 from sliding too much.
Of course, in order to limit the rotation range of the main frame 43 around the folder 50 to ensure the optimal folding state of the tricycle, the present invention provides an arc-shaped limit groove 46 on the engaging portion 44 of the main frame 43, and a limit clip 34 slidably engaged with the limit groove 46 on the engaging portion of the second link 33. When the tricycle is in the unfolded state, the limiting clamp 34 is positioned in one end of the limiting groove 46, and the second connecting rod 33 is further prevented from rotating relative to the main frame 43; when the tricycle is folded, the second connecting rod 33 rotates relative to the main frame 43, and when the other end of the limiting groove 46 on the main frame 43 abuts against the limiting staple 34, the tricycle is folded.
In order to make the whole vehicle beautiful and not expose the folder 50, the present invention has cover plates 63 connected to both side plates 51, and the folder 50 is wrapped by both cover plates 63 from both sides.
In order to improve the riding comfort, the main frame 43 of the present invention is connected with a pedal 71, and the pedal 71 can be folded on the main frame 43 in order to reduce the volume of the folded tricycle. Specifically, a jaw 72 is installed at a rear side of the foot rest 71 on the main frame 43, a foot rest lever of the foot rest 71 is rotatably coupled to the main frame 43 through a rotation shaft 73, a torsion spring 74 is coupled between the jaw 72 and the rotation shaft 73, and the jaw 72 is used to clamp the foot rest lever. The pedal lever is rotated and clamped in the claw 72 to limit the rotation of the rotating shaft 73; similarly, the foot bar is pulled out of the pawl 72, and the torsion spring 74 generates a torque to pull the foot bar back to the original position for the user to step on the pedal 71. Of course, the front wheel 12 may be provided with pedals 71 for driving the tricycle.
In addition, the second connecting piece 41 of the present invention is connected with a telescopic push rod 80, when a small infant uses the tricycle and cannot ride, the adult can push the tricycle by means of the push rod 80; a sunshade 81 may be further installed on the push rod 80 for sunshade and rain-proof.
In order to further improve the riding comfort, the rear wheel bracket 20 of the present invention is provided with a backrest 22, the backrest 22 is provided with a third link 23 having one end rotatably connected thereto, and the other end of the third link 23 is rotatably connected to the push rod 80. Thus, when the tricycle is folded, the push rod 80 can be retracted and folded onto the backrest 22.
In order to conveniently place articles on the tricycle, the invention is provided with a basket 13 on the handlebar stem 11.
In summary, the tricycle provided by the invention is unfolded or folded by arranging the frame as two four-bar mechanisms and rotationally connecting the folder with the two four-bar mechanisms and locking or unlocking the folder, and the tricycle is folded in half, so that the folded tricycle is small in size.
The technical principles of the present invention have been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (6)
1. A folding tricycle having an extended position and a collapsed position, the tricycle comprising:
a front fork;
the handlebar vertical pipe and the front wheel are arranged on the front fork;
a rear wheel support;
a rear wheel arranged on two side parts of the rear wheel bracket,
characterized in that, the tricycle still including connect the front fork with the folding leg between the rear wheel support, the folding leg includes:
a first four-bar linkage connected to the front fork;
a second four-bar linkage connected to the rear wheel support;
the folder is connected between the first four-bar linkage mechanism and the second four-bar linkage mechanism and has a locking state and an unlocking state, and when the folder is in the locking state, the first four-bar linkage mechanism and the second four-bar linkage mechanism are relatively fixed, so that the tricycle is in an unfolding state; when the folder is in an unlocked state, the first four-bar linkage mechanism and the second four-bar linkage mechanism can rotate relatively, and the tricycle is in a folded state by rotating the first four-bar linkage mechanism and/or the second four-bar linkage mechanism;
the first four-bar linkage comprises a first connecting piece, a first connecting bar and a second connecting bar, wherein,
the first connecting piece is arranged on the front fork;
the first connecting rod and the second connecting rod are vertically parallel, one ends of the first connecting rod and the second connecting rod which correspond to each other are rotatably connected with the first connecting piece, and the other ends of the first connecting rod and the second connecting rod which correspond to each other are rotatably connected with the folder;
the second four-bar linkage comprises a second connecting piece, a saddle frame and a main frame, wherein,
the second connecting piece is rotationally connected to the rear wheel bracket;
the saddle seat frame is vertically parallel to the main frame and is respectively opposite to the first connecting rod and the second connecting rod, one end of the saddle seat frame corresponding to the main frame is rotatably connected with the folder, the other end of the saddle seat frame is rotatably connected with the rear wheel bracket, and the other end of the main frame is rotatably connected with the second connecting piece;
the folder comprises two side plates, a frame-shaped inner shell, a slide block, a draw hook, a pin, a tension spring, a locking piece and a limit pin, wherein,
the two side plates are oppositely arranged and are connected with the tops of the two side plates through a shaft rod;
the inner shell is fixed between the two side plates, and a pull rope opening is formed in the top of the inner shell;
the sliding block is arranged in the inner shell and is in sliding fit with the boss at the bottom of the inner shell, and the sliding block is provided with a kidney-shaped groove in sliding fit with the pin and a first inclined plane abutting against the locking piece;
the draw hook is fixed on the sliding block and faces the opening;
the pin is inserted into the kidney-shaped groove and is in sliding fit with the kidney-shaped groove, when the folder is in a locked state, the pin tightly clamps the opposite end parts of the second connecting rod and the main frame, and when the folder is in an unlocked state, the pin is staggered with the opposite end parts of the second connecting rod and the main frame;
one end of the tension spring is connected with the pin, and the other end of the tension spring is connected with the bottom of the inner shell;
one end of the locking piece is rotatably connected with the top of the inner shell, the other end of the locking piece is provided with a second inclined surface which is abutted against the first inclined surface, and the second inclined surface is provided with a stop block which can stop the pin;
the limiting pin is inserted in the side part of the inner shell and used for limiting the rotation amplitude of the locking piece;
and a basket is arranged on the handlebar vertical pipe.
2. The folding tricycle according to claim 1, wherein the opposite ends of the second link and the main frame are arc-shaped engaging portions, the engaging portions are recessed along edges thereof with grooves, when the folder is in a locked state, the pins are engaged in the grooves corresponding to the engaging portions, and the stoppers are pressed against the pins; when the folder is in the unlocked state, the pin is offset from each of the recesses and passes over the stop.
3. The folding tricycle of claim 1 or 2, wherein a cover plate is connected to each of the two side plates, and the two cover plates are used for wrapping the folder.
4. The folding tricycle of claim 1, wherein a pedal and a pawl are coupled to the main frame, wherein,
the pedal rod of the pedal is rotationally connected to the main frame through a rotating shaft;
the jack catch is located pedal rear side is used for pressing from both sides tightly the pedal pole, just the jack catch with be connected with the torsional spring between the pivot.
5. The foldable tricycle of claim 1, wherein a telescoping push rod is connected to the second connector, and a sunshade is connected to the push rod.
6. The foldable tricycle of claim 5, wherein the rear wheel support is provided with a backrest, the backrest is provided with a third connecting rod, one end of the third connecting rod is rotatably connected with the backrest, and the other end of the third connecting rod is rotatably connected with the push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999234.5A CN107628173B (en) | 2017-10-20 | 2017-10-20 | Folding tricycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999234.5A CN107628173B (en) | 2017-10-20 | 2017-10-20 | Folding tricycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107628173A CN107628173A (en) | 2018-01-26 |
| CN107628173B true CN107628173B (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710999234.5A Active CN107628173B (en) | 2017-10-20 | 2017-10-20 | Folding tricycle |
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| Country | Link |
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| CN (1) | CN107628173B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004006903U1 (en) * | 2004-04-29 | 2004-07-01 | Heinz Kettler Gmbh & Co Kg | Foldable frame for a tricycle, balance bike or children's bike |
| CN204473011U (en) * | 2015-02-05 | 2015-07-15 | 太仓市车中宝休闲用品有限公司 | The upper and lower override type portable bicycle of six link rod quick-foldings |
| CN105480342B (en) * | 2016-01-19 | 2018-03-02 | 嘉兴小虎子车业有限公司 | Foldable child tricycle and its method for folding |
| CN106741426B (en) * | 2016-11-21 | 2020-01-14 | 苏州速蝶科技有限公司 | Electric folding tricycle |
| CN106741445A (en) * | 2016-11-21 | 2017-05-31 | 苏州速蝶科技有限公司 | Folding electric-tricycle |
| CN207403854U (en) * | 2017-10-20 | 2018-05-25 | 罗瑞运动用品（昆山）有限公司 | A kind of folding tricycle |
-
2017
- 2017-10-20 CN CN201710999234.5A patent/CN107628173B/en active Active
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| CN107628173A (en) | 2018-01-26 |
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