CN113247163A

CN113247163A - Folding bicycle

Info

Publication number: CN113247163A
Application number: CN202110674646.8A
Authority: CN
Inventors: 张钊
Original assignee: Dongguan Prestige Sporting Products Co Ltd
Current assignee: Dongguan Prestige Sporting Products Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-08-13

Abstract

The invention discloses a folding bicycle which comprises a frame, wheel supports and a linkage mechanism, wherein a first wheel is arranged at the first end of the frame, the wheel supports are symmetrically arranged at two sides of the second end of the frame, and the two wheel supports are respectively provided with a second wheel; the linkage mechanism is arranged between the frame and the wheel supports, and the frame drives the wheel supports on two sides to be drawn close to the middle through the linkage mechanism when folded. The folding bicycle can be folded in the length direction of the bicycle frame, and the two rear wheels can be folded in the width direction of the bicycle frame, so that the folding bicycle has the advantages of small size after being folded and convenience in carrying.

Description

Folding bicycle

Technical Field

The invention relates to a folding vehicle, in particular to a folding vehicle with smaller volume after being folded.

Background

The existing folding bicycle is generally a four-wheel folding bicycle, when folded, the front frame and the rear frame are folded relatively, so that the two rear wheels are relatively close to the two front wheels, and the folding of the length direction of the bicycle frame is realized. However, due to structural limitations of the four-wheeled folding cart, the conventional folding cart can hardly be folded in the width direction of the frame. Therefore, the width of the existing folding bicycle is still large and cannot be reduced after the folding bicycle is folded, so that the size cannot be further reduced, and the portability is reduced.

Disclosure of Invention

The invention aims to provide a folding bicycle which is small in size after being folded and convenient to carry.

In order to achieve the purpose, the folding bicycle provided by the invention comprises a frame, wheel supports and a linkage mechanism, wherein a first wheel is arranged at the first end of the frame, the wheel supports are symmetrically arranged at two sides of the second end of the frame, and the two wheel supports are provided with second wheels; the linkage mechanism is arranged between the frame and the wheel supports, and the frame drives the wheel supports on two sides to be drawn close to the middle through the linkage mechanism when folded.

Compared with the prior art, the folding bicycle has the advantages that the first wheel is arranged at the first end of the bicycle frame, the wheel supports are arranged on the two sides of the second end of the bicycle frame in the width direction, the second wheels are arranged on the two wheel supports, and the two wheel supports are connected between the bicycle frame and the wheels through the linkage mechanism, so that the bicycle frame can drive the two wheel supports to be drawn close to the middle through the linkage mechanism when being folded, the bicycle frame of the folding bicycle can be folded in the length direction and the width direction, the rear wheels can be folded, the size of the whole folding bicycle can be greatly reduced after being folded, the portability is effectively improved, and the use convenience is improved.

Preferably, the linkage mechanism comprises a pushing mechanism and a linkage piece, one end of the linkage piece is connected with the pushing mechanism, and the other end of the linkage piece is connected with the frame; the pushing mechanism is connected with the wheel bracket. The linkage piece drives the pushing mechanism to fold the wheel support along with the folding of the frame, so that the folding convenience of the folding vehicle is effectively improved.

The pushing mechanism comprises a pushing piece and a connecting piece, one end of the pushing piece is pivoted with the linkage piece through a middle shaft, the other end of the pushing piece is pivoted on the frame, and one end of the connecting piece is arranged in a sliding mode along the front and rear directions of the frame and is pivoted with the wheel bracket; the other end of the connecting piece is pivoted with the pushing piece.

Specifically, the pushing mechanism comprises a pushing piece, one end of the pushing piece is pivoted with the linkage piece through a middle shaft, and the other end of the pushing piece is arranged in a sliding mode along the front direction and the rear direction of the frame and is pivoted with the wheel support.

Preferably, the wheel support comprises a first support arm, a second support arm and a sliding seat; one end of the first supporting arm is pivoted to the frame, and the other end of the first supporting arm is connected with the second wheel; one end of the second supporting arm is pivoted to the first supporting arm, the other end of the second supporting arm is pivoted to the sliding seat, and the sliding seat can be arranged in a sliding manner along the front direction and the rear direction of the frame. Can make like this first support arm, second support arm, slide with form an adjustable triangle-shaped structure between the frame, work as when the slide slides and the second support arm takes place to swing, can make whole wheel support take place to remove and fold up, and it is stable not only structural connection, strong to the support nature of frame, folds up very simple and conveniently moreover, effectively improves the convenience of folding up.

Specifically, the wheel bracket further comprises a swing rod and a connecting seat, and the second wheel is arranged on the connecting seat; one end of the connecting seat is pivoted with the first supporting arm; one end of the swing rod is pivoted with the connecting seat, and the other end of the swing rod is pivoted with the frame. When first supporting arm swings and folds up, if the second wheel directly set up in on the first supporting arm, the second wheel can take place the beat after folding up to compact structure nature and aesthetic property after the influence is folded up, consequently, set up pendulum rod and connecting seat can first supporting arm drives when the second wheel swings and folds up, the synchronous drive the second wheel pendulum positive direction for the second wheel still then keeps the gesture to the dead ahead after folding up, guarantees compact structure nature and aesthetic property after folding up.

Specifically, the second end of the frame is provided with a sliding guide rail for guiding the sliding seat to slide or a sleeve which is connected to the sliding seat and telescopically sleeved on the frame. Through the guide of sliding guide or sleeve pipe, both can guarantee the stability and the smoothness nature that the wheel support folded up, can improve the stability of whole folding car structural connection again.

Preferably, the frame comprises a first frame and a second frame, and the adjacent ends of the first frame and the second frame are pivoted with each other; the linkage mechanism is connected between the first frame and the wheel bracket.

Preferably, the folding cart further comprises a driving mechanism disposed between the first frame and the second frame to drive the first frame and the second frame to fold.

Specifically, the folding cart further comprises a driving device, and the driving device is arranged between the first frame and the driving mechanism to drive the driving mechanism. The driving device is utilized to fold the driving mechanism and the frame without manual folding, thereby effectively improving the use convenience.

Specifically, the driving mechanism comprises a first push rod and a second push rod; one end of the first push rod is pivoted with the first frame, and the other end of the first push rod is pivoted with one end of the second push rod; the other end of the second push rod is pivoted with the second frame; the first frame and the second frame can be folded more easily and rapidly by using the auxiliary driving of the first push rod and the second push rod.

Specifically, the folding bicycle further comprises a connecting rod, one end of the connecting rod is pivoted to the first push rod, and the other end of the connecting rod is pivoted to a wheel seat of the first wheel. Because the first frame can drive the first wheel to move when being folded, and the direction control rod on the wheel seat inclines forwards, the connecting rod can drive the wheel to swing in the direction when the first frame and the second frame are folded by arranging the connecting rod, and the direction control rod cannot incline forwards after being folded.

Specifically, the folding vehicle further comprises a seat, and the seat is arranged on the frame.

Specifically, the folding vehicle further comprises a seat folding mechanism, and the seat folding mechanism is arranged between the seat and the frame so as to enable the seat to be drawn towards the frame when folded. The seat can be folded by arranging the seat folding mechanism, so that the volume of the folded folding vehicle is further reduced, and the carrying convenience is improved.

Specifically, the seat folding mechanism is connected with the linkage mechanism to drive the seat to fold under the driving of the linkage mechanism. The seat folding mechanism is driven by the linkage mechanism to enable the seat to be automatically folded along with the folding of the frame, so that the folding convenience is improved.

Specifically, the seat folding mechanism comprises a first support rod, a second support rod and a third support rod; the first support rod and the second support rod are pivoted in a crossed manner, and the lower end of the first support rod is pivoted with the second frame; the lower end of the second supporting rod is connected with the linkage mechanism, and the upper end of the second supporting rod is pivoted with one end of the seat; one end of the third supporting rod is pivoted with the first supporting rod, and the other end of the third supporting rod is pivoted with the other end of the seat.

Specifically, the seat folding mechanism further comprises a back support and a traction member, the back support is pivoted with the upper end of the first support rod, one end of the traction member is pivoted with the seat, and the other end of the traction member is pivoted with the back support. By arranging the traction piece, the back support can be automatically folded along with the folding of the seat folding mechanism, thereby improving the convenience of folding.

Drawings

Fig. 1 is a perspective view of a folding cart according to a first embodiment of the present invention.

Fig. 2 is a side view of the folding cart according to the first embodiment of the present invention.

Fig. 3 is a structural view of the folding cart according to the first embodiment of the present invention with the seat removed.

Fig. 4 is a structural view of a wheel support of the folding bicycle according to the first embodiment of the invention.

Fig. 5 is a structural view of a frame of the folding cart according to the first embodiment of the present invention.

Fig. 6 is a side view of the foldable vehicle according to the first embodiment of the present invention when it is folded in half.

Fig. 7 is a perspective view of the foldable vehicle according to the first embodiment of the present invention when it is folded in half.

Fig. 8 is a side view of the foldable vehicle according to the first embodiment of the present invention after being completely folded.

Fig. 9 is a left side view of the foldable vehicle according to the first embodiment of the present invention after being completely folded.

Fig. 10 is a perspective view of a folding cart according to a second embodiment of the present invention.

Fig. 11 is a side view of the folding cart according to the second embodiment of the present invention.

Fig. 12 is a view showing a structure 11 of a wheel carrier of a folding cart according to a second embodiment of the present invention.

Fig. 13 is a side view of the foldable vehicle according to the second embodiment of the present invention when it is folded in half.

Fig. 14 is a state diagram of the wheel support when the foldable vehicle of the second embodiment of the invention is folded in half.

Fig. 15 is a side view of the foldable vehicle according to the second embodiment of the present invention after being completely folded.

Fig. 16 is a left side view of the foldable vehicle according to the second embodiment of the present invention after being completely folded.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.

As shown in fig. 1 to 9, a structure of a folding cart 100 according to a first embodiment of the present invention is shown.

Referring to fig. 1 and 2, the foldable vehicle 100 of the present embodiment includes a frame 1, wheel brackets 2 and a linkage mechanism 3, wherein a first wheel 4 is disposed at a first end of the frame 1, the wheel brackets 2 are symmetrically disposed at two sides of a second end of the frame 1 in a width direction, and a second wheel 5 is disposed on each of the two wheel brackets 2; the first end is the front end of the frame 1, the second end is the rear end of the frame 1, the first wheel 4 is a front wheel, the second wheel 5 is a rear wheel, and the two second wheels 5 and the first wheel 4 form a tricycle. The linkage mechanism 3 is arranged between the frame 1 and the wheel supports 2, and the frame 1 drives the wheel supports 2 at two sides to be close to the middle through the linkage mechanism 3 when being folded. Specifically, the following:

as shown in fig. 1, 3 and 5, the frame 1 includes a first frame 11 and a second frame 12, wherein adjacent ends of the first frame 11 and the second frame 12 are pivotally connected to each other at a pivot point a, so that the first frame 11 and the second frame 12 are arranged along a length direction of the frame 1; the first frame 11 is of a V-shaped or U-shaped structure, the second frame 12 is of a straight-line-shaped structure, and the first frame and the second frame are connected to enable the frame 1 to be of a Y-shaped structure. The linkage 3 is connected between the first frame 11 and the wheel carrier 2.

Referring to fig. 3, the linkage mechanism 3 includes a pushing mechanism and linkage members 31 symmetrically disposed on two sides of the frame 1. Taking one side as an example, one end of the linkage member 31 is connected with the pushing mechanism, and the other end is connected with the frame 1; the pushing mechanism is connected with the wheel bracket 2. Specifically, the pushing mechanism includes a pushing member 32 and a connecting member 33, one end of the pushing member 32 is pivotally connected to the linking member 31 through a central axis b, the other end of the pushing member 32 is pivotally connected to the second frame 12, and the pivot point is c. The pushing member 32 of the present application has two arms, which are respectively located on two sides of the second frame 12, and the connecting members 33 are symmetrically disposed on two sides of the second frame 12; each arm is used to push the connecting member 33 on the same side. One end of the connecting piece 33 is arranged in a sliding manner along the front and rear directions of the frame 1 and is pivoted with the wheel bracket 2, and the pivoting point is d; the other end of the connecting piece 33 is pivoted with the pushing piece 32, and the pivoting point is e. The first frame 11 is provided with a pivot lug 111, and the linkage member 31 is pivoted on the pivot lug 111 at a pivot point f. The linkage member 31 drives the pushing mechanism to fold the wheel bracket 2 along with the folding of the frame 1, thereby effectively improving the convenience of folding the foldable vehicle 100.

Referring to fig. 4, the wheel bracket 2 includes a first supporting arm 21, a second supporting arm 22, a sliding seat 23, a swing rod 24 and a connecting seat 25; one end of the first support arm 21 is pivotally connected to the wing 121 of the second frame 12 at a pivot point g, and the other end of the first support arm is pivotally connected to the connecting seat 25 at a pivot point h; the two first support arms 21 located on both sides of the second frame 12 form a V-shape. One end of the second supporting arm 22 is pivoted to the first supporting arm 21 at a pivot point i, and the other end is pivoted to the sliding seat 23 at a pivot point j, and the sliding seat 23 is slidably disposed along the front and rear directions of the second frame 12. The pivot axis d of the connecting member 33 pivoted to the sliding base 23 is perpendicular to the pivot axis j of the second supporting arm 22 pivoted to the sliding base 23. Therefore, an adjustable triangular structure is formed among the first supporting arm 21, the second supporting arm 22, the sliding seat 23 and the second frame 12, when the sliding seat 23 slides and the second supporting arm 22 swings, the whole wheel support 2 can be moved and folded, the structure connection is stable, the support performance of the frame 1 is strong, the folding is simple and convenient, and the folding convenience is effectively improved. The second wheel 5 is arranged on the connecting seat 25; one end of the swing link 24 is pivotally connected to the connecting base 25 at a pivot point k, and the other end is pivotally connected to the second frame 12 at a pivot point l. A deformable quadrilateral structure is formed among the first supporting arm 21, the swing rod 24, the second frame 12 and the connecting seat 25; when the first supporting arm 21 swings and folds, if the second wheel 5 is directly arranged on the first supporting arm 21, although the second wheel 5 can also be folded, the second wheel 5 may swing after being folded, so that the compactness and the aesthetic property after being folded are affected, therefore, the swing rod 24 and the connecting seat 25 are arranged, the second wheel 5 can be synchronously driven to swing in the positive direction when the first supporting arm 21 drives the second wheel 5 to swing and fold, the second wheel 5 still keeps the posture in the positive front after being folded, and the compactness and the aesthetic property after being folded are ensured.

Referring to fig. 4, a sliding guide rail 121 for guiding the sliding seat 23 to slide is disposed at the rear end of the second frame 12. The connecting member 33 is slidably inserted into the sliding rail 121 along a pivot axis d pivotally connected to the sliding base 23. By the guiding of the sliding guide rail 121, not only the stability and smoothness of folding the wheel bracket 2 can be ensured, but also the stability of the structural connection of the whole folding vehicle 100 can be improved.

Referring to fig. 5, the foldable vehicle 100 further includes a driving device 6 and a driving mechanism 7, wherein the driving device 6 is disposed between the first frame 11 and the second frame 12 to drive the first frame 11 and the second frame 12 to fold. The driving device 6 is an electric push rod. The frame 1 can be folded by the driving device 6 without manual folding, thereby effectively improving the use convenience. The driving mechanism 7 is disposed between two forks of the V-shaped or U-shaped structure of the first frame 11. The driving mechanism 7 comprises a first push rod 71 and a second push rod 72; one end of the first push rod 71 is pivoted with the first frame 11, and the pivoting point is n, and the other end is pivoted with one end of the second push rod 72, and the pivoting point is m; the other end of the second push rod 72 is pivotally connected to the second frame 12 at a pivot point o; the driving device 6 is pivoted to the first frame 11 at a pivot point p, and an output end of the driving device 6 is pivoted to a middle portion of the first push rod 71 at a pivot point q. The first push rod 71 and the second push rod 72 assist the driving device 6, so that the first frame 11 and the second frame 12 can be folded more easily and quickly.

Referring to fig. 5, in detail, the foldable cart 100 further includes a connecting rod 8, one end of the connecting rod 8 is pivotally connected to the first push rod 71, a pivot axis r is coaxial with a pivot axis q of the driving device 6, the output end of the driving device is pivotally connected to the first push rod 71, the other end of the connecting rod 8 is pivotally connected to the wheel seat 41 of the first wheel 4, and the pivot point is s. The front end of the first frame 4 is pivoted to the wheel seat 41 of the first wheel 4, and the pivot point is 8 a. Since the first frame 11 drives the first wheel 4 to move when being folded, so that the direction control rod 42 on the wheel seat 41 tilts forward, by providing the connecting rod 8, the connecting rod 8 can drive the first wheel 4 to swing while the first frame 11 and the second frame 12 are folded, thereby ensuring that the direction control rod 42 does not tilt forward after being folded.

As shown in fig. 2, the foldable vehicle 100 further includes a seat 9 and a seat folding mechanism 10, wherein the seat 9 is disposed on the frame 1. The seat folding mechanism 10 is disposed between the seat 9 and the frame 1, so as to fold the seat 9 toward the frame 1 when folded. By providing the seat folding mechanism 10, the seat 9 can be folded, so that the folded volume of the foldable vehicle 100 is further reduced, and the convenience of carrying is improved. The seat folding mechanism 10 is connected with the linkage mechanism 3 to drive the seat 9 to fold under the driving of the linkage mechanism 3. The seat folding mechanism 10 is driven by the linkage mechanism 3, so that the seat 9 can be automatically folded along with the folding of the frame 1, and the convenience of folding is improved. Specifically, the seat folding mechanism 10 includes a first support bar 101, a second support bar 102, a third support bar 103, a back support 104 and a traction member 105; the first supporting rod 101 and the second supporting rod 102 are crosswise pivoted, and a pivoting point is t, and the lower end of the first supporting rod 101 is pivoted to the second frame 12, and the pivoting point is u. The lower end of the second support rod 102 is pivotally connected to the pushing member 32 or the linkage member 31 of the linkage mechanism 3, and more preferably, a pivot shaft of the lower end of the second support rod 102 pivotally connected to the pushing member 32 or the linkage member 31 is coaxial with the central axis b, and the upper end of the second support rod 102 is pivotally connected to one end of the seat 9, where the pivot point is v. One end of the third supporting rod 103 is pivotally connected to the first supporting rod 101 at a pivot point w, and the other end of the third supporting rod is pivotally connected to the other end of the seat 9 at a pivot point x. An extending part 1011 extends upwards from the upper end of the first supporting rod 101, and the back support 104 is pivotally connected to the extending part 1011 of the first supporting rod 101. One end of the traction member 105 is pivotally connected to the seat 9 at a pivot point y, and the other end is pivotally connected to the back support 104 at a pivot point z. By providing the traction member 105, the back support 104 can be automatically folded along with the folding of the seat folding mechanism 10, thereby improving the convenience of folding.

In combination with the above description and the accompanying drawings, the folding principle of the folding cart 100 of the present embodiment is described in detail as follows:

referring to fig. 6 to 9, when folding, the driving device 6 starts and pushes the first push rod 71 to swing upward, the first push rod 71 pushes the second push rod 72, and the second push rod 72 pushes the second frame 12, so that the adjacent ends of the first frame 11 and the second frame 12 rise, and the other ends of the first frame 11 and the second frame 12 are close to each other toward the middle. The first frame 11 is folded and the linkage member 31 is driven, so that the rear end of the linkage member 31 moves backwards, the rear end of the linkage member 31 drives the pushing member 32 to swing backwards, the pushing member 32 drives one end of the connecting member 33 to swing, and meanwhile, the other end of the connecting member 33 drives the sliding seat 23 to slide backwards along the sliding guide rail 121 of the second frame 12. At this time, the sliding seat 23 drives the second supporting arm 22 to swing, and the other end of the second supporting arm 22 drives the first supporting arm 21 to draw close the second frame 12, so that the first supporting arm 21, the swing rod 24, the second frame 12 and the connecting seat 25 draw close the second frame 12 to fold. In the above process, the linkage members 31 on both sides push the pushing members 32 to move through the central shaft, so that the two wheel carriers 2 are folded synchronously. When the linkage member 31 pushes the wheel bracket 2 to fold, the linkage member 31 pushes the lower end of the second support rod 102 to swing, so that the lower ends of the first support rod 101 and the second support rod 102 are away from each other and close to the second frame 12. At this time, the third support rod 103 drives the seat 9 to approach the second frame 12; and the traction member 105 drives the back support 104 to close and fold towards the second frame 12. Finally, the frame 1, the wheel bracket 2, the seat 9 and the seat folding mechanism 10 are drawn together to fold the foldable vehicle 100 completely.

Compared with the prior art, the folding bicycle has the advantages that the first wheel 4 is arranged at the first end of the bicycle frame 1, the wheel supports 2 are arranged on the two sides of the second end of the bicycle frame 1 in the width direction, the second wheels 5 are arranged on the two wheel supports 2, and the linkage mechanism 3 is connected between the bicycle frame 1 and the wheels, so that the bicycle frame 1 can drive the two wheel supports 2 to be drawn close to the middle through the linkage mechanism 3 when folded, the bicycle frame of the folding bicycle 100 can be folded in the length direction and the width direction, the rear wheels can be folded, the size of the whole folding bicycle 100 can be greatly reduced after being folded, the portability is effectively improved, and the use convenience is improved.

As shown in fig. 10 to 16, the structure of a folding cart 100' according to a second embodiment of the present invention is shown.

The structure of the folding cart 100 of the present embodiment is basically the same as that of the first embodiment, and the difference is that: the second end of the frame 1 ' is provided with a sleeve 121 ' which is telescopically sleeved on the rear end of the second frame 12 '. The pushing mechanism comprises a pushing member 32 ', one end of the pushing member 32' is pivoted with the link member 31 'through a central shaft b', the other end of the pushing member 32 'is slidably arranged along the front and rear directions of the frame 1' and is pivoted with the sliding seat 23 'of the wheel bracket 2', and a pivoting shaft of the pushing member 32 'pivoted with the sliding seat 23' is connected to the sleeve 121 'to slide along with the sleeve 121'. Thus, the stability and the fluency of folding the wheel support 2 'can be ensured, and the stability of the structural connection of the whole folding vehicle 100' can be improved. In addition, the sleeve 121 ' is sleeved on the rear end of the second frame 12, so that the length of the second frame 12 ' can be shortened when the second frame is unfolded, and the second support arm 22 ' of the wheel bracket 2 ' can swing towards the front end of the frame 1 ' to be closer to the first support arm 21 ', thereby making the structure of the rear end of the foldable vehicle 100 ' more compact and concise. The working principle and the folding effect of the folding cart 100' of the present embodiment are the same as those of the first embodiment, and the description thereof will not be repeated.

The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the present invention, which is therefore intended to cover all equivalent changes and modifications within the scope of the present invention.

Claims

1. A folding vehicle, characterized in that it comprises a frame, a wheel bracket and a linkage mechanism, the first end of the frame is provided with a first wheel, and the wheel bracket is symmetrically arranged on the second side of the frame. On both sides of the end, the two wheel brackets are provided with second wheels; the linkage mechanism is arranged between the frame and the wheel bracket, and the frame drives the two sides through the linkage mechanism when folded. of the wheel brackets are moved closer to the middle.

2. The folding bicycle according to claim 1, wherein the linkage mechanism comprises a push mechanism and a linkage member, one end of the linkage member is connected with the push mechanism, and the other end is connected with the frame; The pushing mechanism is connected with the wheel bracket.

3 . The folding bicycle according to claim 2 , wherein the pushing mechanism comprises a pushing member and a connecting member, one end of the pushing member is pivotally connected to the linkage member through a central axis, and the The other end is pivotally connected to the frame, and one end of the connecting piece is slidably arranged along the front and rear directions of the frame and is pivotally connected to the wheel bracket; the other end of the connecting piece is connected to the pusher Pieces pivot.

4 . The folding cart according to claim 2 , wherein the pushing mechanism comprises a pushing member, one end of the pushing member is pivotally connected to the linkage member through a central shaft, and the other end of the pushing member is along the The front and rear directions of the frame are slidably arranged and pivotally connected with the wheel bracket.

5. The folding bicycle according to any one of claims 1 to 4, wherein the wheel bracket comprises a first support arm, a second support arm and a sliding seat; one end of the first support arm is pivotally connected to the The other end of the frame is connected to the second wheel; one end of the second support arm is pivotally connected to the first support arm, and the other end is pivotally connected to the sliding seat, and the sliding seat can move along the The front and rear directions of the frame are slidably provided.

6 . The folding bicycle according to claim 5 , wherein the wheel bracket further comprises a swing rod and a connecting seat, and the second wheel is arranged on the connecting seat; one end of the connecting seat is connected to the connecting seat. 7 . The first support arm is pivotally connected; one end of the swing rod is pivotally connected to the connecting seat, and the other end is pivotally connected to the vehicle frame.

7 . The folding bicycle according to claim 5 , wherein the second end of the frame is provided with a sliding guide rail for guiding the sliding seat to slide or is connected with the sliding seat in a telescopic manner. 8 . A sleeve sleeved on the frame.

8 . The folding bicycle of claim 1 , wherein the frame comprises a first frame and a second frame, and the adjacent ends of the first frame and the second frame are mutually pivoting; the linkage mechanism is connected between the first frame and the wheel bracket.

9 . The folding vehicle according to claim 8 , wherein the folding vehicle further comprises a driving mechanism, and the driving mechanism is arranged between the first frame and the second frame to drive the first frame. 10 . A frame and the second frame are folded.

10 . The folding cart according to claim 9 , wherein the folding cart further comprises a driving device, and the driving device is arranged between the driving mechanisms of the first frame to drive the driving mechanism 10 . .

11 . The folding bicycle of claim 9 , wherein the driving mechanism comprises a first push rod and a second push rod; one end of the first push rod is pivotally connected to the first frame, and the other One end is pivotally connected to one end of the second push rod; the other end of the second push rod is pivotally connected to the second frame.

12 . The folding bicycle of claim 11 , wherein the folding bicycle further comprises a connecting rod, one end of the connecting rod is pivotally connected to the first push rod, and the other end is pivotally connected to the first push rod. 13 . on the wheel seat of the wheel.

13 . The folding vehicle of claim 8 , wherein the folding vehicle further comprises a seat, and the seat is arranged on the frame. 14 .

14. The folding vehicle according to claim 13, wherein the folding vehicle further comprises a seat folding mechanism, and the seat folding mechanism is arranged between the seat and the frame, so as to The seat is brought closer to the frame when folded.

15 . The folding vehicle of claim 14 , wherein the seat folding mechanism is connected with the linkage mechanism, so as to drive the seat to be folded under the driving of the linkage mechanism. 16 .

16. The folding vehicle of claim 15, wherein the seat folding mechanism comprises a first support rod, a second support rod and a third support rod; the first support rod and the second support rod The lower end of the first support rod is pivotally connected to the second frame; the lower end of the second support rod is connected to the linkage mechanism, and the upper end is pivotally connected to one end of the seat; One end of the third support rod is pivotally connected to the first support rod, and the other end is pivotally connected to the other end of the seat.

17. The folding bicycle of claim 16, wherein the seat folding mechanism further comprises a back support and a traction member, the back support is pivotally connected to the upper end of the first support rod, and the traction One end of the piece is pivotally connected to the seat, and the other end is pivotally connected to the back support.