CN219192467U - Driving system and bicycle - Google Patents

Abstract

The present utility model proposes a drive system and a bicycle, the drive system comprising: the device comprises a transmission mechanism, a left crank, a right crank, a left pedal, a right pedal, a first lower limit part and a second lower limit part; the transmission mechanism is provided with a transmission shaft, the transmission shaft is provided with a first end positioned at one side of the transmission mechanism and a second end positioned at the other side of the transmission mechanism, one end of the left crank is connected with the first end through a first one-way wheel, and the other end of the left crank is connected with the left pedal; one end of the right crank is connected with the second end through a second one-way wheel, and the other end of the right crank is connected with a right pedal; the first lower limiting part is arranged at a first position between the transmission mechanism and the left crank and is used for limiting the rotation lower limit of the left crank; the second lower limiting part is arranged at a second position between the transmission mechanism and the right crank and is used for limiting the rotation lower limit of the right crank. The up-and-down pedal is more suitable for riding on a stand, the user pedal approximately in the range of 100 degrees, a plurality of idle strokes are saved, and the pedal is more in accordance with human engineering.

Description

Driving system and bicycle

Technical Field

The utility model relates to the technical field of transmission systems, in particular to a driving system and a bicycle.

Background

The driving system of the traditional bicycle is almost a driving mode of a left pedal and a right pedal winding, taking one circle of rotation of the left pedal as an example, the driving mode almost only generates driving force when the crank and the horizontal surface of the left pedal form an angle of 45 degrees and an angle of-45 degrees, and the driving force generated in the other approximately 270-degree range is small and basically an idle stroke, so that the overall driving efficiency is not high. There is a need for a drive system that is more efficient in transmission.

Disclosure of Invention

In view of the above, the present utility model provides a driving system and a bicycle for solving the problem of low transmission efficiency of the driving system in the prior art.

To achieve one or some or all of the above or other objects, the present utility model provides a driving system, comprising: the device comprises a transmission mechanism, a left crank, a right crank, a left pedal, a right pedal, a first lower limit part and a second lower limit part;

the transmission mechanism is provided with a transmission shaft, the transmission shaft is provided with a first end positioned at one side of the transmission mechanism and a second end positioned at the other side of the transmission mechanism, one end of the left crank is connected with the first end through a first one-way wheel, and the other end of the left crank is connected with the left pedal; one end of the right crank is connected with the second end through a second unidirectional wheel, and the other end of the right crank is connected with the right pedal;

the first lower limiting part is arranged at a first position between the transmission mechanism and the left crank and is used for limiting the rotation lower limit of the left crank; the second lower limiting part is arranged at a second position between the transmission mechanism and the right crank and is used for limiting the rotation lower limit of the right crank.

Further, the driving system further includes: a first upper limit portion and a second upper limit portion;

the first upper limiting part is arranged at a third position between the transmission mechanism and the left crank and is used for limiting the upper rotating limit of the left crank; the second lower limiting part is arranged at a fourth position between the transmission mechanism and the right crank and is used for limiting the upper rotating limit of the right crank.

Further, the driving system further includes: a left torsion spring and a right torsion spring;

one end of the left torsion spring is connected with the left crank, the other end of the left torsion spring is connected with the transmission mechanism, and when the left crank is positioned between the first position and the third position, the left torsion spring generates torsion force from the first position to the third position;

one end of the right torsion spring is connected with the right crank, the other end of the right torsion spring is connected with the transmission mechanism, and when the right crank is positioned between the second position and the fourth position, the right torsion spring generates torsion from the second position to the fourth position.

Further, the first unidirectional wheel includes: the first ratchet seat, the first elastic sheet, the first ratchet and the first ratchet sleeve; the second unidirectional wheel includes: the second ratchet seat, the second elastic sheet, the second ratchet and the second ratchet sleeve;

the left crank is connected with a first joint with an inner space at one end of the transmission shaft, the first ratchet sleeve is clamped inside the first joint, the first ratchet seat is clamped at the first end and sleeved in the first ratchet sleeve, the first ratchet is clamped on the first ratchet seat, one end of the first elastic piece is abutted against the first ratchet, and the other end of the first elastic piece is abutted against the first ratchet seat to unidirectionally lock the first ratchet sleeve;

the right crank is connected one end of the transmission shaft is provided with a second joint with an inner space, the second ratchet sleeve is clamped inside the second joint, the second ratchet seat is clamped at the second end and sleeved in the second ratchet sleeve, the second ratchet is clamped on the second ratchet seat, one end of the second elastic piece is abutted to the second ratchet, and the other end of the second elastic piece is abutted to the second ratchet seat to unidirectionally lock the second ratchet sleeve.

Further, the left crank includes: a first bearing, a first bearing stop, and a first crank screw; the right crank includes: a second bearing, a second bearing stop, and a second crank screw;

the first bearing is sleeved at the first end and is clamped with the first connector, and the first bearing stop block is covered by the outer side of the first connector and is connected with the first end through the first crank screw for limiting;

the second bearing is sleeved at the second end and is clamped with the second connector, and the second bearing stop block is covered by the outer side of the second connector and is connected with the second end through a second crank screw for limiting.

Further, the first upper limit portion includes: the device comprises a first limiting ring, a first torsion spring, a first limiting screw and a first stop block; the second upper limit part includes: the second limiting ring, the second torsion spring, the second limiting screw and the second stop block;

the transmission mechanism comprises a transmission mechanism shell, a left crank, a first connecting column, a first stop block, a second stop block, a first stop screw and a second stop block, wherein one side of the transmission mechanism shell adjacent to the left crank is provided with the first connecting column, the outer side wall of the first stop block is provided with the first stop block, the inner side wall of the first stop block is provided with the second stop block, the first stop block is sleeved on the first connecting column, one end of the first torsion spring is connected with the first connecting column, the other end of the first torsion spring is connected with the first stop block, the first stop block is abutted with the second stop block, the first stop block is positioned at a position for limiting the left crank, and the first stop block is covered by the outer side of the first stop block and is connected with the first connecting column for limiting through the first stop screw;

the transmission mechanism shell is equipped with a second spliced pole with right crank adjacent one side, and this second spliced pole lateral wall is equipped with the spacing fixture block of third, second spacing ring lateral wall is equipped with the spacing lug of second, and the inside wall is equipped with the spacing fixture block of fourth, and this second spacing ring cup joints on the second spliced pole, second torsional spring one end is connected the second spliced pole, the other end is connected the second spacing ring, so that the spacing fixture block of third with the spacing fixture block butt of fourth, just the spacing lug of second is located right crank is spacing position, the second dog by the spacing ring outside lid of second closes, and passes through the spacing screw connection of second spliced pole is spacing.

Further, the left pedal and the right pedal are foldable pedals.

Further, the left pedal includes: the first folding sleeve, the first anti-rotation component, the first connecting shaft and the first pedal; the right pedal includes: the second folding sleeve, the second anti-rotation component, the second connecting shaft and the second pedal;

the first folding sleeve is movably sleeved at the tail end of the left crank, one end of the first connecting shaft is connected with the first folding sleeve, the first pedal is movably connected with the first connecting shaft through a bearing, and the first anti-rotation component penetrates through the first folding sleeve to be detachably clamped with the left crank and limit the first folding sleeve;

the second folding sleeve is movably sleeved at the tail end of the right crank, one end of the second connecting shaft is connected with the second folding sleeve, the second pedal is movably connected with the second connecting shaft through a bearing, and the second anti-rotation assembly penetrates through the second folding sleeve to be detachably clamped with the right crank and is limited.

Further, the first lower limiting part is a first elastic limiting block connected to the bottom of one side of the transmission mechanism shell adjacent to the left crank; the second lower limiting part is a second elastic limiting block connected to the bottom of one side of the transmission mechanism shell adjacent to the right crank.

To achieve one or some or all of the above or other objects, the present utility model also proposes a bicycle comprising a drive system according to any one of the above.

The implementation of the embodiment of the utility model has the following beneficial effects:

after the driving system is adopted, the origin of coordinates is positioned on the transmission shaft, the X axis faces the front of the automobile for example, the lower limit positions of the left crank and the right crank can be set at an angle of 180 degrees to 240 degrees with the horizontal plane, when the bicycle is ridden, a user steps on the bicycle approximately in a range of 100 degrees, for example, steps on the bicycle in a range of 135 degrees to 225 degrees, the bicycle can always step on the bicycle in the most efficient angle range, and compared with 360 degrees of circular motion, the upper and lower reset saves a lot of idle running strokes. In this case, the crank can be made longer than that of a common bicycle, and according to the lever principle, the longer the arm of force is, the more labor is saved, and the common bicycle crank cannot be driven to the ground, so that the length of the common bicycle crank is limited. In addition, the up-and-down pedal is more suitable for riding by standing, so that the self gravity of a person is fully utilized, the riding is easier, the riding by standing is more ergonomic, and the efficiency of the pedal system is improved by more than 50% compared with that of a common bicycle by combining the three points.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is an exploded view of a drive system in accordance with one embodiment of the present utility model;

FIG. 2 is an enlarged view of the structure of FIG. 1 at A;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

FIG. 4 is a schematic diagram of a driving system according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of the structure at A-A in FIG. 4;

FIG. 6 is a cross-sectional view of the structure at B-B in FIG. 4;

FIG. 7 is a cross-sectional view of the structure at C-C of FIG. 4;

FIG. 8 is a schematic diagram of a driving system according to another embodiment of the present utility model;

fig. 9 is a schematic structural view of a bicycle in accordance with an embodiment of the present utility model.

Reference numerals:

1. a transmission mechanism; 11. a transmission shaft; 111. a first end; 112. a second end; 13. a second connection post; 131. the third limiting clamping block; 14. a limiting shaft;

2. a left crank; 21. a first unidirectional wheel; 211. a first ratchet seat; 212. a first elastic sheet; 213. a first ratchet; 214. a first ratchet sleeve; 22. a first joint; 23. a first bearing; 24. a first bearing stop; 25. a first crank screw;

3. a right crank; 31. a second unidirectional wheel; 311. a second ratchet seat; 312. a second spring plate; 313. a second ratchet; 314. a second ratchet sleeve; 32. a second joint; 33. a second bearing; 34. a second bearing block; 35. a second crank screw;

4. a left pedal; 41. a first fold sleeve; 42. a first anti-rotation assembly; 421. a spring plate; 422. a first anti-rotation baffle; 423. a screw; 43. a first connecting shaft; 44. a first pedal;

5. right foot pedal; 51. a second fold sleeve; 52. a second anti-rotation assembly; 53. a second connecting shaft; 54. a second pedal;

6. a first lower limit part; 61. a first elastic limiting block; 62. a limiting glue fixing sleeve; 63. a bolt; 6a, a first upper limit part; 6a1, a first limiting ring; 6a11, a first limit bump; 6a12, a second limit clamping block; 6a13, a shifter handle; 6a2, a first torsion spring; 6a3, a first limit screw; 6a4, a first stop;

7. a second lower limit part; 71. a second elastic limiting block; 7a, a second upper limit part; 7a1, a second limiting ring; 7a11, a second limit bump; 7a2, a second torsion spring; 7a3, a second limit screw; 7a4, a second stop;

8. a left torsion spring;

9. and a right torsion spring.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1 to 9, an embodiment of the present utility model proposes a driving system including: the device comprises a transmission mechanism 1, a left crank 2, a right crank 3, a left pedal 4, a right pedal 5, a first lower limit part 6 and a second lower limit part 7;

the transmission mechanism 1 is provided with a transmission shaft 11, the transmission shaft 11 is provided with a first end 111 positioned at one side of the transmission mechanism 1 and a second end 112 positioned at the other side of the transmission mechanism 1, one end of the left crank 2 is connected with the first end 111 through a first one-way wheel 21, and the other end of the left crank 2 is connected with the left pedal 4; one end of the right crank 3 is connected with the second end 112 through the second unidirectional wheel 31, and the other end of the right crank 3 is connected with the right pedal 5;

the first lower limiting part 6 is arranged at a first position between the transmission mechanism 1 and the left crank 2 and is used for limiting the rotation lower limit of the left crank 2; the second lower limiting part 7 is arranged at a second position between the transmission mechanism 1 and the right crank 3 and is used for limiting the rotation lower limit of the right crank 3.

In this embodiment, the driving system is a driving structure capable of reciprocating pedaling up and down, taking fig. 8 as an example, an origin of coordinates is set on the driving shaft 11, the X axis faces forward, the Y axis is vertically upward, the first lower limiting portion 6 and the second lower limiting portion 7 are both located at a position about 230 degrees with respect to the X axis, that is, at this time, the first position and the second position are both positions on a straight line forming an angle about 230 degrees with respect to the X axis, the first lower limiting portion 6 can limit the angle about 230 degrees between the left crank 2 and the X axis, and the second lower limiting portion 7 can limit the angle about 230 degrees between the right crank 3 and the X axis. In use, the user can pedal in the most efficient angle range all the time by cycling the pedal in the range of about 130 degrees to 230 degrees. Since the crank is connected to the drive shaft 11 via a unidirectional wheel, which may be a unidirectional bearing or a ratchet wheel. The pedal system has the advantages that the pedal system is provided with a pedal which is downwards pedaled to form a working stroke and is upwards lifted to form an idle stroke, the pedal system is provided with a pedal which is downwards pedaled to form an operating stroke, the pedal system is provided with a pedal which is downwards pedaled to form an idle stroke, the pedal is downwards pedaled to form an operating stroke, the pedal is upwards lifted to form an idle stroke, the pedal system is provided with a pedal which is only pedaled in a range of about 100 degrees, compared with a pedal system which is provided with the pedal system and is provided with the pedal which is circularly moved by 360 degrees, the pedal can not touch the ground, and a crank can be longer than a crank of a common bicycle, so that the arm is longer and more labor-saving according to a lever principle. In addition, the up-and-down pedal is more suitable for riding by standing, so that the self gravity of a person is fully utilized, the riding is easier, the riding by standing is more ergonomic, and the efficiency of the pedal system is improved by more than 50% compared with that of a common bicycle by combining the three points.

It should be noted that, the first lower limiting portion 6 and the second lower limiting portion 7 may be disposed on the transmission mechanism 1, or may be disposed on a frame of the bicycle, so long as the lower limiting position of the crank rotation can be limited during use. The above example is only a preferred embodiment, and the position of the left crank 2 and the X-axis at the angle of 230 is not necessarily limited, and the first lower limiting portion 6 may be set to 240 degrees, 210 degrees, or even 180 degrees.

In one embodiment, the drive system further comprises: a first upper limit part 6a and a second upper limit part 7a;

the first upper limiting part 6a is arranged at a third position between the transmission mechanism 1 and the left crank 2 and is used for limiting the upper rotation limit of the left crank 2; the second lower limiting part 7 is arranged at a fourth position between the transmission mechanism 1 and the right crank 3 and is used for limiting the upper rotation limit of the right crank 3.

In this embodiment, taking the left crank 2 as an example, since the driving system circularly steps in the range of 130 degrees to 230 degrees, the first lower limit portion 6 only limits the lower limit position of the left crank 2, but not the upper limit position, the user needs a certain skill to grasp the pedal circularly in the range of 130 degrees to 230 degrees, and the upper limit position may exceed the range of 130 degrees when the user controls the left crank 2, for example, the left crank 2 is lifted to the range of 120 degrees or 100 degrees, and the force arm is short, the pedal is hard, and the pedal efficiency is not improved. After the first upper limit part 6a is arranged, the left crank 2 is limited to move within the range of 130 degrees to 230 degrees, so that a user can tread in the most efficient angle range all the time, and the tread efficiency of the driving system is ensured. The right crank 3 is similar to the left crank 2 described above, and will not be described again. Similarly, the first upper limit portion 6a and the second upper limit portion 7a may be provided on the transmission mechanism 1, or may be provided on a frame of the bicycle, so long as the upper limit portion can limit the rotation of the crank when in use.

In one embodiment, the drive system further comprises: a left torsion spring 8 and a right torsion spring 9;

one end of the left torsion spring 8 is connected with the left crank 2, the other end of the left torsion spring 8 is connected with the transmission mechanism 1, and when the left crank 2 is positioned between the first position and the third position, the left torsion spring 8 generates torsion from the first position to the third position;

one end of the right torsion spring 9 is connected with the right crank 3, the other end is connected with the transmission mechanism 1, and when the right crank 3 is positioned between the second position and the fourth position, the right torsion spring 9 generates torsion force from the second position to the fourth position.

In the present embodiment, the left torsion spring 8 and the right torsion spring 9 function similarly, and the left torsion spring 8 will be described below as an example: because the left torsion spring 8 is driven by the torsion spring to generate a rotating force, the rotating force pushes the left crank 2 from the first position to the third position, namely, after the user loosens feet when driving the left crank 2 to the first position, the left torsion spring 8 can push the left crank 2 from the first position to the third position, and then the user can drive the left crank 2 to do work again, and the left crank 2 can do work circularly. The need use manpower to push left crank 2 to the third position by the first position can be saved, user's use experience is promoted.

In one embodiment, the first unidirectional wheel 21 comprises: a first ratchet seat 211, a first elastic sheet 212, a first ratchet 213 and a first ratchet sleeve 214; the second unidirectional wheel 31 includes: a second ratchet seat 311, a second elastic piece 312, a second ratchet 313 and a second ratchet sleeve 314;

the left crank 2 is connected with a first joint 22 with an inner space at one end of the transmission shaft 11, a first ratchet sleeve 214 is clamped inside the first joint 22, a first ratchet seat 211 is clamped at a first end 111 and sleeved in the first ratchet sleeve 214, a first ratchet 213 is clamped on the first ratchet seat 211, one end of a first elastic sheet 212 is abutted against the first ratchet 213, and the other end of the first elastic sheet is abutted against the first ratchet seat 211 to unidirectionally lock the first ratchet sleeve 214;

the right crank 3 is connected the second joint 32 that is equipped with the sky in the one end of transmission shaft 11, and second ratchet cover 314 joint is inside second joint 32, and second ratchet seat 311 joint second end 112 cup joints in second ratchet cover 314, and second ratchet 313 card is on second ratchet seat 311, and second shell fragment 312 one end butt second ratchet 313, the other end butt second ratchet seat 311 is with second ratchet cover 314 unidirectional locking.

In this embodiment, the first unidirectional wheel 21 and the second unidirectional wheel 31 are similar in structure, taking the first unidirectional wheel 21 as an example, the first unidirectional wheel 21 realizes unidirectional rotation of the left crank 2 through a first ratchet sleeve 214 configured inside the first joint 22 and a first ratchet seat 211 clamped at a first end 111 on the transmission shaft 11, that is, one end of the first elastic sheet 212 is abutted against the first ratchet 213, and the other end is abutted against the first ratchet seat 211, so that the first ratchet 213 is meshed with the first ratchet sleeve 214 to realize unidirectional locking. Referring to fig. 1 and 5, in specific use, when the left crank 2 moves from top to bottom, the left crank 2 and the transmission shaft 11 are in a locking state, the left crank 2 drives the transmission shaft 11 to rotate, the transmission shaft 11 does work internally, so that power input is realized, when the left crank 2 moves from bottom to top, the left crank 2 and the transmission shaft 11 are in an unlocking state, the left crank 2 returns upwards, the transmission shaft 11 does not rotate, and namely, the motion from bottom to top is an idle stroke of the left crank 2. It should be noted that the number of the first elastic pieces 212 and the first ratchet teeth 213 may be one, two, three, etc. as required.

In one embodiment, the left crank 2 comprises: a first bearing 23, a first bearing stop 24 and a first crank screw 25; the right crank 3 includes: a second bearing 33, a second bearing stopper 34, and a second crank screw 35;

the first bearing 23 is sleeved with the first end 111 and is clamped with the first joint 22, and the first bearing stop block 24 is covered by the outer side of the first joint 22 and is connected with the first end 111 for limiting through a first crank screw 25;

the second bearing 33 is sleeved on the second end 112 and is clamped with the second joint 32, and the second bearing stop block 34 is covered by the outer side of the second joint 32 and is connected with the second end 112 for limiting through a second crank screw 35.

In this embodiment, one or two of the first bearings 23 may be optionally provided, mainly to reduce the connection friction of the first joint 22 and simultaneously reduce the load of the first unidirectional wheel 21. When there are two first bearings 23, one first bearing 23 may be provided on each side of the first one-way wheel 21. The second bearing 33 is similar to the first bearing 23 and will not be described again.

In one embodiment, the first upper limit portion 6a includes: a first stopper ring 6a1, a first torsion spring 6a2, a first stopper screw 6a3, and a first stopper 6a4; the second upper limit portion 7a includes: a second stopper ring 7a1, a second torsion spring 7a2, a second stopper screw 7a3, and a second stopper 7a4;

a first connecting column is arranged on one side, adjacent to the left crank 2, of the shell of the transmission mechanism 1, a first limiting clamping block is arranged on the outer side wall of the first connecting column, a first limiting projection 6a11 is arranged on the outer side wall of the first limiting ring 6a1, a second limiting clamping block 6a12 is arranged on the inner side wall of the first limiting ring 6a1, the first connecting column is connected with one end of a first torsion spring 6a2, the first limiting ring 6a1 is connected with the other end of the first torsion spring, the first limiting clamping block is abutted with the second limiting clamping block 6a12, the first limiting projection 6a11 is located at a position limiting the left crank 2, the first stop block 6a4 is covered on the outer side of the first limiting ring 6a1 and is connected with the first connecting column through a first limiting screw 6a3 for limiting;

the shell of the transmission mechanism 1 is provided with a second connecting column 13 on one side adjacent to the right crank 3, the outer side wall of the second connecting column 13 is provided with a third limiting clamping block 131, the outer side wall of the second limiting ring 7a1 is provided with a second limiting convex block 7a11, the inner side wall of the second limiting ring 7a1 is provided with a fourth limiting clamping block, the second limiting ring 7a1 is sleeved on the second connecting column 13, one end of a second torsion spring 7a2 is connected with the second connecting column 13, the other end of the second torsion spring 7a2 is connected with the second limiting ring 7a1, the third limiting clamping block 131 is abutted with the fourth limiting clamping block, the second limiting convex block 7a11 is located at a position limiting the right crank 3, and a second stop block 7a4 is covered on the outer side of the second limiting ring 7a1 and is connected with the second connecting column 13 for limiting through a second limiting screw 7a 3.

In this embodiment, the first upper limiting portion 6a limits the first upper limiting portion through the first torsion spring 6a2, specifically, the first limiting ring 6a1 is sleeved with the first connecting column, the first limiting ring and the first connecting column can rotate relatively, the outer side wall of the first connecting column is provided with a first limiting clamping block, the inner side wall of the first limiting ring 6a1 is provided with a second limiting clamping block 6a12, the first limiting ring 6a1 cannot rotate again when rotating to the first limiting clamping block and the second limiting clamping block 6a12 to be contacted, and more specifically, a torsion force is applied to the first limiting ring 6a1 through the first torsion spring 6a2, so that the first limiting clamping block and the second limiting clamping block 6a12 are always in a position of abutting connection, and under this position, the first limiting protruding block 6a11 is located in a position limiting the left crank 2. The first limiting bump 6a11 may be in a form of limiting the left crank 2, wherein a protruding structure corresponding to the first limiting bump 6a11 is disposed on the outer side wall of the first joint 22 on the left crank 2, and the first limiting bump 6a11 is abutted to the protruding structure for limiting. The above-mentioned limit mode of the first upper limit part 6a can adjust the position of the first limit bump 6a11 by manually rotating the shift lever 6a13 on the first limit ring 6a1 to release the limit of the first limit bump 6a11 to the left crank 2, so that the left crank 2 can be rotated and folded. The structure of the second upper limit portion 7a is similar to the structure of the first upper limit portion 6a, and will not be described again.

In one embodiment, the left foot rest 4 and the right foot rest 5 are foldable foot rests.

In one embodiment, the left foot rest 4 comprises: a first folder 41, a first anti-rotation assembly 42, a first connecting shaft 43, and a first pedal 44; the right pedal 5 includes: a second folder 51, a second anti-rotation assembly 52, a second connecting shaft 53, and a second pedal 54;

the first folding sleeve 41 is movably sleeved at the tail end of the left crank 2, one end of the first connecting shaft 43 is connected with the first folding sleeve 41, the first pedal 44 is movably connected with the first connecting shaft 43 through a bearing, and the first anti-rotation component 42 penetrates through the first folding sleeve 41 to be detachably clamped with the left crank 2 and limit the first folding sleeve 41;

the second folding sleeve 51 is movably sleeved at the tail end of the right crank 3, one end of the second connecting shaft 53 is connected with the second folding sleeve 51, the second pedal 54 is movably connected with the second connecting shaft 53 through a bearing, the second rotation-preventing assembly 52 penetrates through the second folding sleeve 51 to be detachably clamped with the right crank 3, and the second folding sleeve 51 is limited.

In this embodiment, the first anti-rotation component 42 is a component or a combination of several components with a circumferential limiting structure, taking fig. 1 and fig. 6 as an example, where the first anti-rotation component 42 is composed of a spring plate 421, a first anti-rotation block 422 and a screw 423, where an inward protruding quadrilateral projection is disposed on the inner side of the first anti-rotation block 422, and a quadrilateral groove is disposed on the end face side of the end of the left crank 2, and the first anti-rotation block 422 is fastened to the end of the left crank 2 through the quadrilateral projection and the quadrilateral groove and then is fastened to the end of the left crank 2 by the screw 423, so that the first anti-rotation block 422 cannot rotate circumferentially, and at this time, the spring plate 421 is sandwiched between the first anti-rotation block 422 and the first folding sleeve 41 to increase the rotation friction force of the first folding sleeve 41, that is, the first pedal 44 can rotate only when the first pedal 44 is pulled by a very large force during use. With reference to the first stop collar 6a1 in the above embodiment, which is in a form of a socket-connection with the first connecting post, the first folding sleeve 41 and the end of the left crank 2 may be provided with a plurality of clamping blocks, that is, the inner side wall of the first folding sleeve 41 and the outer side wall of the end of the left crank 2 are provided with mutually matched clamping blocks, so as to stop the first pedal 44 when it is folded outwards to a position parallel to the horizontal plane, as shown in fig. 1. The structure of one side of the right pedal 5 is similar to that of the left pedal 4, and the description is omitted.

In one embodiment, the first lower limiting part 6 is a first elastic limiting block 61 connected to the bottom of one side of the casing of the transmission mechanism 1 adjacent to the left crank 2; the second lower limit part 7 is a second elastic limit block 71 connected to the bottom of one side of the casing of the transmission mechanism 1 adjacent to the right crank 3.

In this embodiment, the first elastic limiting block 61 is made of an elastic material, such as rubber or silica gel, or is made of a spring-connected iron block, for example, the first elastic limiting block 61 is made of a rubber block, and is connected to the limiting shaft 14 disposed on the housing of the transmission mechanism 1 through auxiliary fixing members such as the limiting rubber fixing sleeve 62 and the bolt 63, so that when the left crank 2 is stepped to the lower limit position, the left crank abuts against the first elastic limiting block 61, and the first elastic limiting block 61 generates an elastic force to buffer, so that the use comfort of the user is enhanced. The second elastic stopper 71 is similar to the first elastic stopper 61, and will not be described again.

To achieve one or some or all of the above objects or other objects, the present utility model also provides a bicycle, which includes a drive system according to any one of the above objects. Fig. 9 shows a version of the bicycle described above.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (10)

1. A drive system, comprising: the device comprises a transmission mechanism, a left crank, a right crank, a left pedal, a right pedal, a first lower limit part and a second lower limit part;

the transmission mechanism is provided with a transmission shaft, the transmission shaft is provided with a first end positioned at one side of the transmission mechanism and a second end positioned at the other side of the transmission mechanism, one end of the left crank is connected with the first end through a first one-way wheel, and the other end of the left crank is connected with the left pedal; one end of the right crank is connected with the second end through a second unidirectional wheel, and the other end of the right crank is connected with the right pedal;

the first lower limiting part is arranged at a first position between the transmission mechanism and the left crank and is used for limiting the rotation lower limit of the left crank; the second lower limiting part is arranged at a second position between the transmission mechanism and the right crank and is used for limiting the rotation lower limit of the right crank.

2. The drive system of claim 1, wherein the drive system further comprises: a first upper limit portion and a second upper limit portion;

the first upper limiting part is arranged at a third position between the transmission mechanism and the left crank and is used for limiting the upper rotating limit of the left crank; the second lower limiting part is arranged at a fourth position between the transmission mechanism and the right crank and is used for limiting the upper rotating limit of the right crank.

3. The drive system of claim 2, wherein the drive system further comprises: a left torsion spring and a right torsion spring;

one end of the left torsion spring is connected with the left crank, the other end of the left torsion spring is connected with the transmission mechanism, and when the left crank is positioned between the first position and the third position, the left torsion spring generates torsion force from the first position to the third position;

one end of the right torsion spring is connected with the right crank, the other end of the right torsion spring is connected with the transmission mechanism, and when the right crank is positioned between the second position and the fourth position, the right torsion spring generates torsion from the second position to the fourth position.

4. The drive system of claim 1, wherein the first unidirectional wheel comprises: the first ratchet seat, the first elastic sheet, the first ratchet and the first ratchet sleeve; the second unidirectional wheel includes: the second ratchet seat, the second elastic sheet, the second ratchet and the second ratchet sleeve;

the left crank is connected with a first joint with an inner space at one end of the transmission shaft, the first ratchet sleeve is clamped inside the first joint, the first ratchet seat is clamped at the first end and sleeved in the first ratchet sleeve, the first ratchet is clamped on the first ratchet seat, one end of the first elastic piece is abutted against the first ratchet, and the other end of the first elastic piece is abutted against the first ratchet seat to unidirectionally lock the first ratchet sleeve;

the right crank is connected one end of the transmission shaft is provided with a second joint with an inner space, the second ratchet sleeve is clamped inside the second joint, the second ratchet seat is clamped at the second end and sleeved in the second ratchet sleeve, the second ratchet is clamped on the second ratchet seat, one end of the second elastic piece is abutted to the second ratchet, and the other end of the second elastic piece is abutted to the second ratchet seat to unidirectionally lock the second ratchet sleeve.

5. The drive system of claim 4, wherein the left crank further comprises: a first bearing, a first bearing stop, and a first crank screw; the right crank further includes: a second bearing, a second bearing stop, and a second crank screw;

the first bearing is sleeved at the first end and is clamped with the first connector, and the first bearing stop block is covered by the outer side of the first connector and is connected with the first end through the first crank screw for limiting;

the second bearing is sleeved at the second end and is clamped with the second connector, and the second bearing stop block is covered by the outer side of the second connector and is connected with the second end through a second crank screw for limiting.

6. The drive system of claim 2, wherein the first upper limit comprises: the device comprises a first limiting ring, a first torsion spring, a first limiting screw and a first stop block; the second upper limit part includes: the second limiting ring, the second torsion spring, the second limiting screw and the second stop block;

the transmission mechanism comprises a transmission mechanism shell, a left crank, a first connecting column, a first stop block, a second stop block, a first stop screw and a second stop block, wherein one side of the transmission mechanism shell adjacent to the left crank is provided with the first connecting column, the outer side wall of the first stop block is provided with the first stop block, the inner side wall of the first stop block is provided with the second stop block, the first stop block is sleeved on the first connecting column, one end of the first torsion spring is connected with the first connecting column, the other end of the first torsion spring is connected with the first stop block, the first stop block is abutted with the second stop block, the first stop block is positioned at a position for limiting the left crank, and the first stop block is covered by the outer side of the first stop block and is connected with the first connecting column for limiting through the first stop screw;

the transmission mechanism shell is equipped with a second spliced pole with right crank adjacent one side, and this second spliced pole lateral wall is equipped with the spacing fixture block of third, second spacing ring lateral wall is equipped with the spacing lug of second, and the inside wall is equipped with the spacing fixture block of fourth, and this second spacing ring cup joints on the second spliced pole, second torsional spring one end is connected the second spliced pole, the other end is connected the second spacing ring, so that the spacing fixture block of third with the spacing fixture block butt of fourth, just the spacing lug of second is located right crank is spacing position, the second dog by the spacing ring outside lid of second closes, and passes through the spacing screw connection of second spliced pole is spacing.

7. The drive system of claim 1, wherein the left foot rest and the right foot rest are foldable foot rests.

8. The drive system of claim 7, wherein the left foot rest comprises: the first folding sleeve, the first anti-rotation component, the first connecting shaft and the first pedal; the right pedal includes: the second folding sleeve, the second anti-rotation component, the second connecting shaft and the second pedal;

the first folding sleeve is movably sleeved at the tail end of the left crank, one end of the first connecting shaft is connected with the first folding sleeve, the first pedal is movably connected with the first connecting shaft through a bearing, and the first anti-rotation component penetrates through the first folding sleeve to be detachably clamped with the left crank and limit the first folding sleeve;

the second folding sleeve is movably sleeved at the tail end of the right crank, one end of the second connecting shaft is connected with the second folding sleeve, the second pedal is movably connected with the second connecting shaft through a bearing, and the second anti-rotation assembly penetrates through the second folding sleeve to be detachably clamped with the right crank and is limited.

9. The drive system of claim 1, wherein the first lower limit portion is a first elastic limit block connected to a bottom portion of a side of the transmission housing adjacent to the left crank; the second lower limiting part is a second elastic limiting block connected to the bottom of one side of the transmission mechanism shell adjacent to the right crank.

10. A bicycle, characterized in that it comprises a drive system according to any one of claims 1 to 9.

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