CN210027757U - Folding tricycle - Google Patents

Abstract

The utility model discloses a foldable tricycle, its frame includes the front truck frame, the back frame, and the saddle, the front truck frame includes the front fork at least, locate the front wheel of front fork lower part, locate front fork upper portion and be used for controlling the handlebar that the front wheel turned to, the lower part of back frame is provided with the rear wheel, the frame is still including setting up the link between frame and back frame in the front, the link extends along the fore-and-aft direction, the front portion of link is connected with the front truck frame rotation ground and is locked through preceding locking mechanical system between the two, the rear portion of link is connected with the upper portion of back frame rotation ground and is locked through back locking mechanical system between the two, the saddle is located on the back frame, when the frame is in fold condition, the rear portion of link upwards sticks up, the front truck frame, link and back support draw in the rear side at the back support along the fore-and-aft. The folding and the opening operation of this foldable tricycle are all very convenient, and its folding small, conveniently carry and accomodate and deposit.

Description

Folding tricycle

Technical Field

The utility model relates to a foldable tricycle.

Background

The child tricycle in the prior art comprises a front fork, a front wheel arranged at the bottom of the front fork, a handlebar arranged on the front fork and capable of controlling the front wheel to steer, a rear frame, a saddle arranged on the rear frame, and a rear wheel arranged at the rear part of the bottom of the rear frame. Most of children's tricycles in the prior art can not be folded, or the structure after folding is not compact enough, leads to children's tricycle not convenient to deposit and transport.

Disclosure of Invention

The utility model aims at providing a novel foldable tricycle.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a foldable tricycle comprises a frame with an unfolded state and a folded state, wherein the frame comprises a front frame, a rear frame and a saddle, the front frame at least comprises a front fork, a front wheel arranged at the lower part of the front fork, a handlebar arranged at the upper part of the front fork and used for controlling the steering of the front wheel, the lower part of the rear frame is provided with a rear wheel, the frame further comprises a connecting frame arranged between the front frame and the rear frame, the connecting frame extends along the front-rear direction, the front part of the connecting frame is rotationally connected with the front frame and is locked between the front frame and the rear frame through a front locking mechanism, the rear part of the connecting frame is rotationally connected with the upper part of the rear frame and is locked between the front frame and the rear frame through a rear locking mechanism, the saddle is arranged on the rear frame, and when the frame is in the folded state, the rear part of the connecting frame is, the front frame, the connecting frame and the rear frame are mutually drawn together along the front-back direction, and the saddle is drawn in at the rear side of the rear frame.

Preferably, a linkage assembly is arranged between the front locking mechanism and the rear locking mechanism, and the linkage assembly drives the rear locking mechanism to unlock in the process that the front frame rotates and folds relative to the connecting frame.

Furthermore, the front portion of the connecting frame is rotatably connected with the front frame through a rotating shaft, an unlocking slide block capable of ordering the unlocking of the rear locking mechanism when the rear frame slides is arranged on the rear frame, the linkage assembly comprises a driving piece and a traction cable, the driving piece is arranged between the connecting frame and the front frame, the traction cable is connected between the driving piece and the unlocking slide block, the connecting frame rotates relative to the front frame, so that the front frame and the connecting frame are mutually folded, and the driving piece rotates around the rotating shaft to order the unlocking of the rear locking mechanism.

Further, the front locking mechanism includes a locking joint, the locking joint includes a first joint seat, a second joint seat, a locking toothed disc, and an elastic member, one of the first joint seat and the second joint seat is fixedly connected to the front frame, the other one of the first joint seat and the second joint seat is fixedly connected to the front portion of the connecting frame, the first joint seat, the locking toothed disc, and the second joint seat are rotatably connected around the rotating shaft, the elastic member is disposed between the first joint seat and the locking toothed disc, the first joint seat has a plurality of first toothed grooves circumferentially spaced apart, the second joint seat has a plurality of second toothed grooves circumferentially spaced apart, the outer peripheral portion of the locking toothed disc has a plurality of locking teeth circumferentially spaced apart, when the front locking mechanism is in a locked state, both end portions of the locking teeth are respectively inserted into the first toothed grooves and the second toothed grooves, when the front locking mechanism is in an unlocking state, the locking teeth are separated from the second tooth grooves, and the driving piece can be rotatably arranged between the locking fluted disc and the first joint seat around the rotating shaft and is driven to rotate by the locking fluted disc when the front locking mechanism is unlocked.

As a specific implementation manner, the driving member includes a mounting ring rotatably sleeved on the rotating shaft, and a rotating block fixed on one side of the mounting ring, the traction cable is connected between the rotating block and the unlocking slider, a limiting groove is formed on a peripheral portion of the locking fluted disc, and the rotating block is located in the limiting groove.

Furthermore, the rear locking mechanism comprises a locking slide block arranged on the connecting frame, a lock pin arranged on the locking slide block and a lock hole which is arranged on the upper portion of the rear frame and is used for being matched with the lock pin, the sliding direction of the locking slide block is perpendicular to that of the unlocking slide block, an unlocking inclined plane is arranged on the unlocking slide block, a matching inclined plane matched with the unlocking inclined plane is arranged on the locking slide block, and a spring used for driving the locking slide block to move away from the unlocking slide block is further arranged between the unlocking slide block and the locking slide block.

Preferably, the front part of the saddle is rotatably connected to the rear frame, the saddle has an open state and a retracted state relative to the rear frame, and when the saddle is switched from the open state to the retracted state, the height of the rear part of the saddle relative to the rear frame is reduced and the saddle is folded with the rear frame.

Preferably, the front part of the saddle is rotatably connected to the rear frame, the rear part of the saddle is provided with a saddle support part extending downwards, the rear frame is provided with a support block capable of being supported below the saddle support part, the support block is movably arranged on the rear frame, the saddle has an opening state and a retracting state relative to the rear frame, and when the saddle is in the opening state, the support block is supported below the saddle support part; when the saddle is in the folding state, the supporting block is separated from the lower part of the saddle supporting piece, so that the saddle is folded relative to the rear frame.

Furthermore, the supporting block is slidably arranged on the rear frame, the rear frame is also slidably provided with a jacking tongue capable of driving the supporting block to slide when sliding, when the frame is in an unfolded state, the jacking tongue is jacked at the rear part of the connecting frame, and the supporting block is matched with the saddle support piece; when the frame is in a folded state, the jacking tongue is separated from the rear part of the connecting frame and drives the supporting block to slide so that the supporting block is far away from the lower part of the saddle supporting block.

Furthermore, a sliding pin is arranged at the rear part of the ejector tongue, a sliding groove for the sliding pin to penetrate in a sliding fit manner is formed in the supporting block, a first elastic piece for providing elastic force required for relatively keeping the ejector tongue away from the supporting block is further arranged between the ejector tongue and the supporting block, and a second elastic piece for driving the ejector tongue to move in the direction away from the supporting block is arranged between the ejector tongue and the rear frame.

As a specific implementation manner, the rear frame is provided with a rear tube connected with the connecting frame, the supporting block is slidably arranged in a tube cavity of the rear tube, the rear tube is further provided with an open slot communicated with the tube cavity, and the lower part of the saddle supporting piece is inserted in the open slot and matched with the supporting block.

As a specific implementation mode, the rear frame comprises a rear tube connected with the connecting frame and two groups of rear supporting rods which are respectively arranged on the left side and the right side and extend along the vertical direction, the lower part of each group of rear supporting rods is provided with the rear wheel, the two groups of rear supporting rods are integrally arranged to form a U-shaped rod with a downward opening, the rear tube extends along the front-rear direction, and the upper part of the U-shaped rod and the rear part of the rear tube are relatively fixedly arranged.

Preferably, the front frame further comprises a front seat tube extending in the up-down direction, the upper part of the front fork is rotatably connected with the front seat tube around the axis thereof, and the front part of the connecting frame is rotatably connected with the front seat tube.

Preferably, a folding locking structure is further arranged between the rear frame and the connecting frame, and when the frame is in a folded state, the folding locking structure is locked when the rear frame and the connecting frame are close to each other, so that the rear frame and the connecting frame are relatively fixed.

Preferably, the front locking mechanism has a locked state and an unlocked state, and when the frame is in the unfolded state and the folded state, the front locking mechanism is in the locked state, so that the connecting frame and the front frame are relatively fixed.

Further, the front locking mechanism includes a locking joint, the locking joint includes a first joint seat, a second joint seat, a locking toothed disc, and an elastic member, one of the first joint seat and the second joint seat is fixedly connected to the front frame, the other is fixedly connected to the front portion of the connecting frame, the first joint seat, the locking toothed disc, and the second joint seat are rotatably connected around the same rotation center line, the elastic member is disposed between the first joint seat and the locking toothed disc, the first joint seat has a plurality of first toothed grooves distributed at intervals in the circumferential direction, the second joint seat has a plurality of second toothed grooves distributed at intervals in the circumferential direction, the outer circumferential portion of the locking toothed disc has a plurality of locking teeth distributed at intervals in the circumferential direction, when the front locking mechanism is in a locked state, both end portions of the locking teeth are respectively inserted into the first toothed grooves and the second toothed grooves, when the front locking mechanism is in an unlocked state, the locking teeth are disengaged from the second tooth grooves.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a foldable tricycle, wherein be connected with the link through rotating between preceding frame and the back frame, when the tricycle is folding, make preceding frame and the relative link of back frame respectively rotate foldingly, just can realize folding up of frame, in the frame after folding up, preceding frame, link and back frame draw close each other and support in ground with the rear wheel jointly along the fore-and-aft direction, the saddle then draws in the rear portion of back frame, because the back frame is longer, folding back saddle can not exceed the frame height after folding along the back frame, consequently make folding back frame height lower, and the width of fore-and-aft direction is less, the structure is very compact, the volume is also very little, for the daily carrying of user and accomodate and all brought the facility.

Drawings

Fig. 1 is a first perspective view of the foldable tricycle of the present invention in an unfolded state;

FIG. 2 is a second perspective view of the foldable tricycle of the present invention in an unfolded state;

fig. 3 is a side view of the foldable tricycle of the present invention in an unfolded state;

FIG. 4 is a longitudinal cut-away schematic view of FIG. 3;

FIG. 5 is an exploded view of the foldable tricycle of the present invention;

FIG. 6 is an exploded view of the front locking mechanism of the foldable tricycle of the present invention;

FIG. 7 is an exploded view of the rear locking mechanism of the foldable tricycle of the present invention;

FIG. 8 is an exploded view of the saddle support assembly of the foldable tricycle of the present invention;

fig. 9 is a side view of the foldable tricycle of the present invention after being folded in the first step;

FIG. 10 is a longitudinal cut-away schematic view of FIG. 9;

fig. 11 is a side view of the foldable tricycle of the present invention after the second folding step;

FIG. 12 is a longitudinal cut-away schematic view of FIG. 11;

fig. 13 is a side view of the foldable tricycle of the present invention after the third step of folding;

FIG. 14 is a longitudinal cut-away schematic view of FIG. 13;

FIG. 15 is a first perspective view of the foldable tricycle of the present invention in a folded state;

FIG. 16 is a second perspective view of the foldable tricycle of the present invention in a folded state;

wherein:

1. a front frame; 10. a front wheel; 11. a front fork; 12. a handlebar; 13. a front riser; 14. pedaling;

2. a rear frame; 20. a rear wheel; 21. a rear vehicle pipe; 21a, an open slot; 22. a rear support rod;

3. a connecting frame;

4. a saddle; 41. a saddle support;

5. a front locking mechanism; 50. a rotating shaft; 51. a first joint seat; 52. a second joint seat; 53. a locking fluted disc; 53a, locking teeth; 53b, a limiting groove; 54. an elastic member (spring); 55. an unlock button;

6. a rear locking mechanism; 60. a rotating shaft; 61. locking the slide block; 62. a lock pin; 63. unlocking the slide block; 64. a spring; 65. unlocking the inclined plane; 66. a mating bevel; 67. a lock hole;

7. a linkage assembly; 71. a drive member; 71a, a mounting ring; 71b, a turning block; 72. a traction cable;

8. a saddle support assembly; 81. a support block; 82. a top tongue; 83. a first elastic member; 84. a second elastic member; 85. a chute; 86. a slide pin; 87. fixing the guide sleeve;

9. the locking structure is folded.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 16, a folding tricycle includes a frame having an unfolded state and a folded state, the frame including a front frame 1, a rear frame 2, a link 3 connected between the front frame 1 and the rear frame 2, and a saddle 4 provided on the rear frame 2, wherein the link 3 extends in a front-rear direction, a front portion of the link 3 is rotatably connected with the front frame 1, and a rear portion of the link 3 is rotatably connected with an upper portion of the rear frame 2.

A front locking mechanism 5 is arranged between the front part of the connecting frame 3 and the front frame 1, a rear locking mechanism 6 is arranged between the connecting frame 3 and the upper part of the rear frame 2, and a linkage component 7 is arranged between the front locking mechanism 5 and the rear locking mechanism 6, so that in the process of rotating and folding the front frame 1 relative to the connecting frame 3, the linkage component 7 can drive the rear locking mechanism 6 to unlock, and the rear frame 2 can rotate relative to the connecting frame 3 to further fold the frame.

Referring to the drawings, the front frame 1 includes a front fork 11, a front wheel 10 disposed at the bottom of the front fork 11, and a handlebar 12 disposed at the upper portion of the front fork 11 and used for controlling the turning of the front wheel 10, and pedals 14 are further mounted on both sides of an axle of the front wheel 10 for a child to step on to rotate the front wheel 10. The front frame 1 further includes a front seat tube 13 extending in the vertical direction, and an upper portion of the front fork 11 is rotatably connected to the front seat tube 13 around its axis. The front part of the connecting frame 3 is rotatably connected to the front frame 1 by a rotatable connection to the front seat tube 13.

Referring to the drawings, the rear frame 2 has a rear tube 21 connected to the connecting frame 3, and two sets of rear stays 22 respectively disposed on the left and right sides and extending in the vertical direction, a rear wheel 20 is disposed on the lower portion of each set of rear stays 22, the two sets of rear stays 22 are integrally disposed to form a U-shaped rod with a downward opening, the rear tube 21 extends in the front-rear direction, the upper portion of the U-shaped rod is relatively fixedly disposed with the rear portion of the rear tube 21, and the rear tube 21 and the U-shaped rod can be integrally formed or fixedly connected to each other for fixing. The front part of the rear tube 21 is rotatably connected with the rear part of the connecting frame 3, thereby realizing the rotary connection of the rear frame 2 and the connecting frame 3.

The connecting frame 3 is here provided as a hollow tube extending in the front-rear direction, the front part of the connecting frame 3 being rotatably connected to the front seat tube 13 in the front frame 1 via a rotary shaft 50, and the rear part of the connecting frame 3 being rotatably connected to the front part of the rear tube 21 in the rear frame 2 via a rotary shaft 60. The front lock mechanism 5 is provided between the front seat tube 13 and the connecting frame 3, and the rear lock mechanism 6 is provided between the rear tube 21 and the connecting frame 3. In this embodiment, the rear frame 2 is provided with an unlocking slider 63 capable of driving the rear locking mechanism 6 to unlock during sliding, the linkage assembly 7 includes a driving member 71 disposed between the connecting frame 3 and the front frame 1, and a traction cable 72 connected between the driving member 71 and the unlocking slider 63, and when the connecting frame 3 rotates relative to the front frame 1 to make the front frame 1 rotate relative to the connecting frame 3 and fold, the driving member 71 rotates around the rotating shaft 50 to tension the traction cable 72, so as to pull the unlocking slider 63 to slide and make the rear locking mechanism 6 unlock.

More specifically, referring to fig. 3 to 14, the front locking mechanism 5 includes a locking joint, the locking joint includes a first joint seat 51, a second joint seat 52, a locking toothed disc 53 and an elastic member 54, one of the first joint seat 51 and the second joint seat 52 is fixedly connected to the front stem 13, the other is fixedly connected to the front portion of the connecting frame 3, where the first joint seat 51 is fixedly arranged at the rear portion of the front stem 13, and the second joint seat 52 is fixedly arranged at the front portion of the connecting frame 3. The first joint seat 51, the second joint seat 52, and the locking toothed disc 53 are rotatably connected about the rotating shaft 50. The elastic member 54 is a spring, which is disposed between the first joint seat 51 and the locking disk 53. As shown in fig. 6, the first joint seat 51 has a plurality of first tooth grooves distributed at intervals in the circumferential direction, the second joint seat 52 has a plurality of second tooth grooves distributed at intervals in the circumferential direction, the outer peripheral portion of the locking tooth disk 53 has a plurality of locking teeth 53a distributed at intervals in the circumferential direction, and when the front locking mechanism 5 is in the locked state, both end portions of the locking teeth 53a are respectively inserted into the first tooth grooves and the second tooth grooves; when the front lock mechanism 5 is in the unlocked state, the lock teeth 53a are disengaged from the second teeth grooves. The locking joint further comprises an unlocking button 55 slidably disposed on the outer side of the second joint seat 52, and the unlocking button 55 is pressed to drive the locking toothed disc 53 to disengage from the second toothed groove against the action of the elastic member 54, so as to unlock the front locking mechanism 5.

The driver 71 is rotatably provided between the lock toothed disc 53 and the first joint seat 51 about the rotation shaft 50 and is driven to rotate by the lock toothed disc 53 after the front lock mechanism 5 is unlocked. Specifically, as shown in fig. 4, 6 and 10, the driving member 71 includes a mounting ring 71a rotatably fitted over the rotating shaft 50, and a rotating block 71b fixed to one side of the mounting ring 71a, the pulling cable 72 is connected between the rotating block 71b and the unlocking slider 63, a limit groove 53b is formed on the peripheral portion of the locking toothed disc 53, and the rotating block 71b is located in the limit groove 53 b. Thus, after the front locking mechanism 5 is unlocked, as shown in fig. 10, the front frame 1 is driven to rotate relative to the connecting frame 3, the first joint seat 51 drives the locking toothed disc 53 to rotate therewith, and when the groove wall of the limiting groove 53b abuts against the rotating block 71b after rotating a certain angle, the rotating block 71b is driven to rotate together, so that the traction cable 72 is tensioned and pulls the unlocking slide block 63 to move forward, thereby unlocking the rear locking mechanism 6.

In this embodiment, the locking joint is used as the front locking mechanism 5, which not only can be used to lock the front frame 1 and the connecting frame 3 relatively when the frame is unfolded, but also can lock the front frame 1 and the connecting frame 3 relatively when the frame is folded, i.e. the front frame 1 and the connecting frame 3 are rotated and folded relatively. That is, the front lock mechanism 5 is in the locked state regardless of whether the frame is in the unfolded state or the folded state, so that the front frame 1 and the link frame 3 are kept locked to each other.

Referring to fig. 3 to 14, the rear locking mechanism 6 includes a locking slider 61 disposed on the connecting frame 3, a lock pin 62 disposed on the locking slider 61, and a lock hole 67 opened at the upper portion of the rear frame 2 and used for being engaged with the lock pin 62, the sliding direction of the locking slider 61 is perpendicular to the sliding direction of the unlocking slider 63, and in particular, the locking slider 61 and the unlocking slider 63 are both disposed in the tube cavity of the connecting frame 3. An unlocking inclined surface 65 is arranged on the unlocking slide block 63, a matching inclined surface 66 matched with the unlocking inclined surface 65 is arranged on the locking slide block 61, and a spring 64 with elastic force required for driving the locking slide block 61 to move away from the unlocking slide block 63 is further arranged between the unlocking slide block 63 and the locking slide block 61. When the rear lock mechanism 6 is in the locked state, the lock pin 62 is fittingly inserted in the lock hole 67 under the urging force of the spring 64 to fix the connecting frame 3 with the rear frame 2; when the unlocking slide 63 moves forward, the unlocking inclined surface 65 is matched with the matching inclined surface 66 to drive the locking slide 61 to move, so that the lock pin 62 is separated from the lock hole 67, the rear locking mechanism 6 is unlocked, and at the moment, the rear frame 2 can rotate and fold relative to the connecting frame 3 around the rotating shaft 60.

In this embodiment, a folding locking structure 9 is further disposed between the rear frame 2 and the connecting frame 3, and when the rear frame 2 and the connecting frame 3 are close to each other, the folding locking structure 9 is locked to keep the rear frame 2 and the connecting frame 3 relatively fixed.

Referring to fig. 3 to 14, a front portion of the saddle 4 is rotatably coupled to the rear frame 2, where the front portion of the saddle 4 is rotatably coupled to the rear frame 2 by a rotation shaft 60, a saddle support 41 extending downward is provided at a rear portion of the saddle 4, a saddle support assembly 8 is provided on the rear frame 2, the saddle support assembly 8 having at least a support block 81 for cooperating with the saddle support 41, the support block 81 being movably provided on the rear frame 2. The saddle 4 has an open state and a retracted state with respect to the rear frame 2, and when the saddle 4 is in the open state, the lower portion of the saddle support 41 is supported on the support block 81, as shown in fig. 3 and 4; when the saddle is in the stowed state, the support block 81 disengages from below the saddle support 41 to lower the height of the rear portion of the saddle 4 relative to the rear frame 2, thereby bringing the saddle 4 and the rear frame 2 closer to each other.

Thus, in the frame unfolding state, a user can lift the saddle 4 to enable the saddle to be in a relatively high position so as to provide comfortable sitting and standing support for children, and in the frame folding state, the saddle 4 can be overturned and folded relative to the rear frame 2 so as to further reduce the volume after the frame is folded.

In this embodiment, the supporting block 81 is slidably disposed on the rear frame 2, the rear frame 2 is further slidably disposed with a tongue 82, the tongue 82 can drive the supporting block 81 to slide when sliding, when the frame is in the unfolded state, the tongue 82 is disposed at the rear of the connecting frame 3, and at this time, the supporting block 81 and the saddle support 41 are mutually matched; when the frame is in the folded state, the tongue 82 is disengaged from the rear of the connecting frame 3 and drives the support block 81 to slide forward together so that the support block 81 is away from the underside of the saddle support 41.

Specifically, referring to fig. 8, 10, 12 and 14, the front part of the rear tube 21 of the rear frame 2 is fixedly provided with a fixing guide sleeve 87 to provide the tongue 82 for sliding guiding and limiting. The supporting block 81 is slidably disposed in a tube cavity of the rear tube 21, an opening groove 21a communicating with the tube cavity is further formed in the rear tube 21, and the lower portion of the saddle support 41 is engaged with the supporting block 81 by being inserted into the opening groove 21 a.

The rear part of the bolt 82 is provided with a sliding pin 86, the supporting block 81 is provided with a sliding groove 85 for the sliding pin 86 to penetrate in a sliding fit manner, a first elastic element 83 for providing elastic force required for relatively keeping the bolt 82 and the supporting block 81 away from each other is further arranged between the bolt 82 and the supporting block 81, and a second elastic element 84 for driving the bolt 82 to move in the direction away from the supporting block 81 is arranged between the bolt 82 and the rear frame 2. Here, both the first elastic member 83 and the second elastic member 84 are springs.

When the connecting frame 3 and the rear frame 2 are not rotated and folded, as shown in fig. 4 and 10, under the action of the second elastic member 84, the top tongue 82 abuts against the rear portion of the connecting frame 3, specifically against the rear portion of the locking slider 61, and at this time, the supporting block 81 is located below the saddle supporting member 41 and provides stable support for the saddle supporting member; when the connecting frame 3 is rotated and folded relative to the rear frame 2, as shown in fig. 12, the rear portion of the connecting frame 3 is separated from the front portion of the rear frame 2, so that the tongue 82 slides forward under the action of the second elastic member 84, and drives the supporting block 81 to slide forward and gradually separate from the lower portion of the saddle supporting member 41, and finally, as shown in fig. 14, the saddle 4 is manually rotated, the saddle supporting member 41 further pushes the supporting block 81 forward to slide forward, so that the saddle 4 is folded relative to the rear frame 2, and the supporting block 81 is abutted against the side portion of the saddle supporting member 41 under the action of the first elastic member 83, so that the supporting block is kept in the folded state relative to the rear frame 2.

In the unfolded state of the folding tricycle, as shown in fig. 1 to 4, the front locking mechanism 5 and the rear locking mechanism 6 are both in the locked state, and the saddle 4 is in the open state relative to the rear frame 2. When the tricycle needs to be folded, the unlocking button 55 is operated to unlock the front locking mechanism 5, and then the front frame 1 is driven to turn over relative to the connecting frame 3 around the rotating shaft 50, as shown in fig. 9 and 10, in the process, the linkage assembly 7 drives the unlocking slide block 63 to slide forwards so that the rear locking mechanism 6 is unlocked in a linkage manner; subsequently, the front frame 1 together with the connecting frame 3 is folded and turned around the rotating shaft 60 relative to the rear frame 2, as shown in fig. 11 and 12, at this time, the jack tongue 82 is separated from the rear part of the connecting frame 3, and drives the supporting block 81 to slide forwards to be separated from the lower part of the saddle support 41; finally, the saddle 4 is pressed downwards to be folded relative to the rear frame 2, as shown in fig. 13 and 14, the folding of the tricycle frame is completed, the folded tricycle is as shown in fig. 15 and 16, the front wheel 10 and the rear wheel 20 are supported on the ground together, the rear part of the connecting frame 3 is in an upward standing state, the front frame 1, the connecting frame 3 and the rear frame 2 are mutually closed along the front-back direction, the relative locking is kept between the front frame 1 and the connecting frame 3 and between the connecting frame 3 and the rear frame 2, the saddle 4 is folded at the rear side of the rear frame 2, the structure is very compact, the size is small, and the folding and the carrying are convenient.

When the tricycle needs to be unfolded, the user can operate according to the following steps: the locking of the folding locking structure 9 is firstly released, the rear frame 2 is rotated and opened relative to the connecting frame 3, then the unlocking button 55 is pressed to unlock the front locking mechanism 5, the front frame 1 is driven to rotate and open relative to the connecting frame 3, the driving piece 71 in the linkage piece 7 is gradually reset, the unlocking slide block 63 is also gradually reset, and the rear locking mechanism 6 is locked again. Finally, the saddle 4 is lifted upwards, the support blocks 81 return to re-form a stable support for the saddle support 41 below the saddle 4, and the frame is completely unfolded.

To sum up, the utility model discloses a foldable tricycle, it is folding and open the operation all very convenient, and its folding small, conveniently carries and accomodates and deposit.

The above references to the front, rear, up and down orientations are all defined with reference to the orientation of the tricycle as viewed by a child when the tricycle is in an extended position for use by the child.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (16)

1. The utility model provides a foldable tricycle, is including having the frame of expansion state and fold condition, the frame includes preceding frame, back frame, and saddle, preceding frame includes the front fork at least, locates the front wheel of front fork lower part, locate front fork upper portion just is used for controlling the handlebar that the front wheel turned to, the lower part of back frame is provided with rear wheel, its characterized in that: the frame is still including setting up preceding frame with link between the back frame, the link extends along the fore-and-aft direction, the front portion of link with preceding frame is connected with rotating and is locked through preceding locking mechanical system between the two, the rear portion of link with the upper portion of back frame is connected with rotating and is locked through back locking mechanical system between the two, the saddle is located on the back frame, works as when the frame is in fold condition, the rear portion of link upwards erects, preceding frame the link with back frame draws close each other along the fore-and-aft direction, the saddle draws in the rear side of back frame.

2. The folding tricycle of claim 1, wherein: and a linkage assembly is arranged between the front locking mechanism and the rear locking mechanism, and the linkage assembly drives the rear locking mechanism to unlock in the process that the front frame rotates and folds relative to the connecting frame.

3. The folding tricycle of claim 2, wherein: the front portion of link pass through the axis of rotation with preceding frame rotates and connects, be provided with on the back frame and order about when sliding the unblock slider of back locking mechanical system unblock, the linkage subassembly is including locating the link with driving piece between the preceding frame, connect the driving piece with the pull cable between the unblock slider, the link is relative preceding frame rotates and makes preceding frame with the in-process that the link draws in each other, the driving piece winds the axis of rotation is rotatory and orders about back locking mechanical system unblock.

4. The folding tricycle of claim 3, wherein: the front locking mechanism comprises a locking joint, the locking joint comprises a first joint seat, a second joint seat, a locking fluted disc and an elastic piece, one of the first joint seat and the second joint seat is fixedly connected with the front frame, the other one of the first joint seat and the second joint seat is fixedly connected with the front part of the connecting frame, the first joint seat, the locking fluted disc and the second joint seat are rotatably connected around the rotating shaft, the elastic piece is arranged between the first joint seat and the locking fluted disc, the first joint seat is provided with a plurality of first tooth grooves distributed at intervals along the circumferential direction, the second joint seat is provided with a plurality of second tooth grooves distributed at intervals along the circumferential direction, the peripheral part of the outer side of the locking fluted disc is provided with a plurality of locking teeth distributed at intervals along the circumferential direction, when the front locking mechanism is in a locking state, two end parts of the locking teeth are respectively inserted into the first tooth grooves and the second tooth grooves, when the front locking mechanism is in an unlocked state, the locking teeth are disengaged from the second tooth grooves,

the driving piece can be arranged between the locking fluted disc and the first joint seat in a rotating mode around the rotating shaft and is driven to rotate by the locking fluted disc when the front locking mechanism is unlocked.

5. The folding tricycle of claim 4, wherein: the driving piece comprises a mounting ring and a rotating block, the mounting ring can be rotatably sleeved on the rotating shaft, the rotating block is fixed to one side of the mounting ring, the traction cable is connected between the rotating block and the unlocking slide block, a limiting groove is formed in the peripheral portion of the locking fluted disc, and the rotating block is located in the limiting groove.

6. The folding tricycle of claim 3, wherein: the rear locking mechanism comprises a locking slide block arranged on the connecting frame, a lock pin arranged on the locking slide block and a lock hole arranged on the upper portion of the rear frame and used for being matched with the lock pin, the sliding direction of the locking slide block is perpendicular to that of the unlocking slide block, an unlocking inclined plane is arranged on the unlocking slide block, a matching inclined plane matched with the unlocking inclined plane is arranged on the locking slide block, and a spring used for driving the locking slide block to be far away from elastic force required by movement of the unlocking slide block is further arranged between the unlocking slide block and the locking slide block.

7. The folding tricycle of claim 1, wherein: the front part of the saddle is rotationally connected to the rear frame, the saddle has an opening state and a retracting state relative to the rear frame, and when the saddle is switched from the opening state to the retracting state, the height of the rear part of the saddle relative to the rear frame is reduced and the rear frame is mutually folded.

8. The folding tricycle of claim 1, wherein: the front part of the saddle is rotationally connected to the rear frame, the rear part of the saddle is provided with a saddle supporting piece extending downwards, the rear frame is provided with a supporting block capable of being supported below the saddle supporting piece, the supporting block is movably arranged on the rear frame, the saddle has an opening state and a retracting state relative to the rear frame, and when the saddle is in the opening state, the supporting block is supported below the saddle supporting piece; when the saddle is in the folding state, the supporting block is separated from the lower part of the saddle supporting piece, so that the saddle is folded relative to the rear frame.

9. The folding tricycle of claim 8, wherein: the supporting block is arranged on the rear frame in a sliding mode, the rear frame is further provided with a jacking tongue capable of driving the supporting block to slide in a sliding mode, when the frame is in an unfolded state, the jacking tongue is arranged at the rear portion of the connecting frame in an abutting mode, and the supporting block is matched with the saddle supporting piece; when the frame is in a folded state, the jacking tongue is separated from the rear part of the connecting frame and drives the supporting block to slide so that the supporting block is far away from the lower part of the saddle supporting block.

10. The folding tricycle of claim 9, wherein: the rear part of the ejector tongue is provided with a sliding pin, the supporting block is provided with a sliding groove for the sliding pin to penetrate in a sliding fit manner, a first elastic element used for providing elastic force required for relatively keeping the ejector tongue and the supporting block away from each other is further arranged between the ejector tongue and the supporting block, and a second elastic element used for driving the ejector tongue to move towards the direction away from the supporting block is arranged between the ejector tongue and the rear frame.

11. The folding tricycle of any of claims 8 to 10, wherein: the rear frame is provided with a rear tube connected with the connecting frame, the supporting block is slidably arranged in a tube cavity of the rear tube, the rear tube is further provided with an open slot communicated with the tube cavity, and the lower part of the saddle supporting piece is inserted in the open slot and matched with the supporting block.

12. The folding tricycle of claim 1, wherein: the rear frame include with the back car pipe that the link is connected to and divide and locate the left and right sides and all follow two sets of back branch that the upper and lower direction extends, the lower part of every group back branch all is provided with the rear wheel is two sets of back branch an organic whole sets up and is the U type pole that the opening is down, the back car pipe extends along the fore-and-aft direction, the upper portion of U type pole with the rear portion relatively fixed ground of back car pipe sets up.

13. The folding tricycle of claim 1, wherein: the front frame further comprises a front vertical pipe extending in the vertical direction, the upper portion of the front fork can be rotatably connected with the front vertical pipe around the axis of the front fork, and the front portion of the connecting frame is rotatably connected with the front vertical pipe.

14. The folding tricycle of claim 1, wherein: a folding locking structure is further arranged between the rear frame and the connecting frame, and when the frame is in a folding state, the folding locking structure is locked when the rear frame and the connecting frame are mutually closed, so that the rear frame and the connecting frame are relatively fixed.

15. The folding tricycle of claim 1, wherein: the front locking mechanism is provided with a locking state and an unlocking state, and when the frame is in the unfolding state and the folding state, the front locking mechanism is in the locking state, so that the connecting frame and the front frame are relatively fixed.

16. The folding tricycle of claim 15, wherein: the front locking mechanism comprises a locking joint, the locking joint comprises a first joint seat, a second joint seat, a locking fluted disc and an elastic piece, one of the first joint seat and the second joint seat is fixedly connected with the front frame, the other one of the first joint seat and the second joint seat is fixedly connected with the front part of the connecting frame, the first joint seat, the locking fluted disc and the second joint seat are rotatably connected around the same rotating central line, the elastic piece is arranged between the first joint seat and the locking fluted disc, the first joint seat is provided with a plurality of first gullets distributed at intervals along the circumferential direction, the second joint seat is provided with a plurality of second gullets distributed at intervals along the circumferential direction, the peripheral part of the outer side of the locking fluted disc is provided with a plurality of locking teeth distributed at intervals along the circumferential direction, when the front locking mechanism is in a locking state, two end parts of the locking teeth are respectively inserted into the first gullet and the second gullet, when the front locking mechanism is in an unlocked state, the locking teeth are disengaged from the second tooth grooves.

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