Drive system and bicycle

Abstract

The embodiment of the application discloses a driving system, which 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 has a first end located at one side of the transmission mechanism and a second end located 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 the right pedal. The first lower limit part is arranged at a first position between the transmission mechanism and the left crank, and is used for limiting the lower limit position of the rotation of the left crank. The second lower limit part is arranged at a second position between the transmission mechanism and the right crank, and is used for limiting the lower limit position of the rotation of the right crank. The up-and-down pedaling is more suitable for standing riding, the user pedals in a range of about 100 degrees, a lot of idle stroke is saved, and ergonomics is met.

Description

Technical Field

[0001] This invention relates to the field of transmission system technology, and more particularly to a drive system and a bicycle. Background Technology

[0002] Traditional bicycle drive systems almost exclusively use a circular drive pattern with the left and right pedals. Taking the left pedal's rotation as an example, this drive pattern generates driving force only when the crank of the left pedal is at a 45-degree angle and -45-degree angle to the horizontal plane. The driving force generated within the other nearly 270-degree range is very small, essentially just idle travel, resulting in low overall drive efficiency. A drive system with higher transmission efficiency is needed. Summary of the Invention

[0003] In view of this, the present invention provides a drive system and a bicycle to solve the problem of low transmission efficiency in the drive system of the prior art.

[0004] To achieve one or more of the above objectives or other objectives, the present invention provides a drive system comprising: 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;

[0005] The transmission mechanism is provided with a transmission shaft, which has a first end located on one side of the transmission mechanism and a second end located on the other side of the transmission mechanism. One end of the left crank is connected to the first end through a first one-way wheel, and the other end of the left crank is connected to the left pedal. One end of the right crank is connected to the second end through a second one-way wheel, and the other end of the right crank is connected to the right pedal.

[0006] The first lower limit part is disposed at a first position between the transmission mechanism and the left crank, and is used to limit the lower limit position of the rotation of the left crank; the second lower limit part is disposed at a second position between the transmission mechanism and the right crank, and is used to limit the lower limit position of the rotation of the right crank.

[0007] Furthermore, the drive system further includes: a first upper limit stop and a second upper limit stop;

[0008] The first upper limit stop is disposed at a third position between the transmission mechanism and the left crank, and is used to limit the upper limit position of the rotation of the left crank; the second lower limit stop is disposed at a fourth position between the transmission mechanism and the right crank, and is used to limit the upper limit position of the rotation of the right crank.

[0009] Furthermore, the drive system also includes: a left torsion spring and a right torsion spring;

[0010] One end of the left torsion spring is connected to the left crank, and the other end is connected to the transmission mechanism. When the left crank is between the first position and the third position, the left torsion spring generates a torque from the first position to the third position.

[0011] One end of the right torsion spring is connected to the right crank, and the other end is connected to the transmission mechanism. When the right crank is between the second and fourth positions, the right torsion spring generates a torque from the second position to the fourth position.

[0012] Furthermore, the first one-way wheel includes: a first ratchet seat, a first spring, a first ratchet, and a first ratchet sleeve; the second one-way wheel includes: a second ratchet seat, a second spring, a second ratchet, and a second ratchet sleeve;

[0013] The left crank is connected to one end of the drive shaft and has a hollow first connector. The first ratchet sleeve is engaged inside the first connector. The first ratchet seat is engaged with the first end and sleeved inside the first ratchet sleeve. The first ratchet is engaged on the first ratchet seat. One end of the first spring abuts against the first ratchet and the other end abuts against the first ratchet seat to lock the first ratchet sleeve in one direction.

[0014] The right crank is connected to one end of the drive shaft and has a hollow second connector. The second ratchet sleeve is engaged inside the second connector. The second ratchet seat is engaged with the second end and sleeved inside the second ratchet sleeve. The second ratchet is engaged on the second ratchet seat. One end of the second spring abuts against the second ratchet and the other end abuts against the second ratchet seat to lock the second ratchet sleeve in one direction.

[0015] Furthermore, 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;

[0016] The first bearing is sleeved on the first end and snapped into the first connector. The first bearing stop is covered by the outside of the first connector and is limited by the first crank screw connected to the first end.

[0017] The second bearing is sleeved onto the second end and snapped into the second connector. The second bearing stop is covered by the outside of the second connector and is limited by the second crank screw connected to the second end.

[0018] Furthermore, the first upper limit part includes: a first limit ring, a first torsion spring, a first limit screw, and a first stop; the second upper limit part includes: a second limit ring, a second torsion spring, a second limit screw, and a second stop;

[0019] The transmission mechanism housing has a first connecting post on the side adjacent to the left crank. The outer wall of the first connecting post has a first limiting block, the outer wall of the first limiting ring has a first limiting protrusion, and the inner wall has a second limiting block. The first limiting ring is sleeved on the first connecting post. One end of the first torsion spring is connected to the first connecting post, and the other end is connected to the first limiting ring, so that the first limiting block and the second limiting block abut against each other, and the first limiting protrusion is located at the position that limits the left crank. The first stop is covered by the outer side of the first limiting ring and is limited by the first limiting screw connected to the first connecting post.

[0020] The transmission mechanism housing has a second connecting post on the side adjacent to the right crank. The outer wall of the second connecting post has a third limiting block, the outer wall of the second limiting ring has a second limiting protrusion, and the inner wall has a fourth limiting block. The second limiting ring is sleeved on the second connecting post. One end of the second torsion spring is connected to the second connecting post, and the other end is connected to the second limiting ring, so that the third limiting block and the fourth limiting block abut against each other, and the second limiting protrusion is located at the position that limits the right crank. The second stop is covered by the outer side of the second limiting ring and is limited by the second limiting screw connected to the second connecting post.

[0021] Furthermore, both the left and right foot pedals are foldable.

[0022] Furthermore, the left foot pedal includes: a first folding sleeve, a first anti-rotation component, a first connecting shaft, and a first foot pedal; the right foot pedal includes: a second folding sleeve, a second anti-rotation component, a second connecting shaft, and a second foot pedal;

[0023] The first folding sleeve is movably fitted onto the end of the left crank, one end of the first connecting shaft is connected to the first folding sleeve, the first foot pedal is movably connected to the first connecting shaft through a bearing, and the first anti-rotation component passes through the first folding sleeve and is detachably engaged with the left crank, thereby limiting the position of the first folding sleeve.

[0024] The second folding sleeve is movably fitted onto the end of the right crank. One end of the second connecting shaft is connected to the second folding sleeve. The second foot pedal is movably connected to the second connecting shaft through a bearing. The second anti-rotation component passes through the second folding sleeve and is detachably engaged with the right crank, thus limiting the position of the second folding sleeve.

[0025] Furthermore, the first lower limit portion is a first elastic limiting block connected to the bottom of the transmission mechanism housing adjacent to the left crank; the second lower limit portion is a second elastic limiting block connected to the bottom of the transmission mechanism housing adjacent to the right crank.

[0026] To achieve one or more of the above objectives or other objectives, the present invention also provides a bicycle comprising the drive system described in any of the preceding claims.

[0027] Implementing the embodiments of the present invention will have the following beneficial effects:

[0028] With the aforementioned drive system, taking an example where the origin is on the drive shaft and the X-axis points forward, the lower limits of the left and right cranks can be set at angles between 180 and 240 degrees to the horizontal. When riding, the user pedals within a range of approximately 100 degrees, such as between 135 and 225 degrees, ensuring they are always pedaling at the most efficient angle. The vertical reset also saves significantly more free-spinning travel compared to a 360-degree circular motion. In this case, the cranks can be made longer than those on a regular bicycle. According to the lever principle, a longer lever arm requires less effort, but the cranks on a regular bicycle cannot reach the ground, thus limiting their length. Furthermore, this vertical pedaling method is more suitable for standing while riding, fully utilizing the rider's own weight, making riding easier and more ergonomic. Combining these three points, this pedaling system is more than 50% more efficient than a regular bicycle. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] in:

[0031] Figure 1 This is an exploded view of the drive system in one embodiment of the present invention;

[0032] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0033] Figure 3 for Figure 1 Enlarged view of the structure at point B in the middle;

[0034] Figure 4 This is a schematic diagram of the drive system in one embodiment of the present invention;

[0035] Figure 5 for Figure 4 Sectional view of the structure at point AA;

[0036] Figure 6 for Figure 4 Structural cross-section view at point BB;

[0037] Figure 7 for Figure 4 Cross-sectional view of the structure at point CC;

[0038] Figure 8 This is a schematic diagram of the drive system in another embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the structure of a bicycle in one embodiment of the present invention.

[0040] Figure label:

[0041] 1. Transmission mechanism; 11. Transmission shaft; 111. First end; 112. Second end; 13. Second connecting post; 131. Third limiting block; 14. Limiting shaft;

[0042] 2. Left crank; 21. First one-way pulley; 211. First ratchet seat; 212. First spring; 213. First ratchet; 214. First ratchet sleeve; 22. First connector; 23. First bearing; 24. First bearing stop; 25. First crank screw;

[0043] 3. Right crank; 31. Second one-way pulley; 311. Second ratchet seat; 312. Second spring; 313. Second ratchet; 314. Second ratchet sleeve; 32. Second connector; 33. Second bearing; 34. Second bearing stop; 35. Second crank screw;

[0044] 4. Left foot pedal; 41. First folding sleeve; 42. First anti-rotation component; 421. Spring; 422. First anti-rotation baffle; 423. Screw; 43. First connecting shaft; 44. First foot pedal;

[0045] 5. Right foot pedal; 51. Second folding sleeve; 52. Second anti-rotation component; 53. Second connecting shaft; 54. Second foot pedal;

[0046] 6. First lower limit part; 61. First elastic limit block; 62. Limiting rubber fixing sleeve; 63. Bolt; 6a. First upper limit part; 6a1. First limit ring; 6a11. First limit protrusion; 6a12. Second limit block; 6a13. Handle; 6a2. First torsion spring; 6a3. First limit screw; 6a4. First stop block;

[0047] 7. Second lower limit part; 71. Second elastic limit block; 7a. Second upper limit part; 7a1. Second limit ring; 7a11. Second limit protrusion; 7a2. Second torsion spring; 7a3. Second limit screw; 7a4. Second stop block;

[0048] 8. Left torsion spring;

[0049] 9. Right torsion spring. Detailed Implementation

[0050] Unless otherwise defined, 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 invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0053] Reference Figures 1 to 9 The present invention provides a drive system comprising: 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;

[0054] The transmission mechanism 1 is provided with a transmission shaft 11, which has a first end 111 located on one side of the transmission mechanism 1 and a second end 112 located on the other side of the transmission mechanism 1. One end of the left crank 2 is connected to the first end 111 through a first one-way wheel 21, and the other end of the left crank 2 is connected to the left pedal 4. One end of the right crank 3 is connected to the second end 112 through a second one-way wheel 31, and the other end of the right crank 3 is connected to the right pedal 5.

[0055] The first lower limit part 6 is disposed at a first position between the transmission mechanism 1 and the left crank 2, and is used to limit the lower limit position of the rotation of the left crank 2; the second lower limit part 7 is disposed at a second position between the transmission mechanism 1 and the right crank 3, and is used to limit the lower limit position of the rotation of the right crank 3.

[0056] In this embodiment, the aforementioned drive system is a transmission structure capable of reciprocating up-and-down pedaling, so as to... Figure 8For example, assuming the origin of the coordinate system is located on the drive shaft 11, the X-axis faces forward, and the Y-axis is vertically upward, the first lower limit part 6 and the second lower limit part 7 are both located at an angle of approximately 230 degrees to the X-axis. That is, both the first and second positions are on a straight line forming an angle of approximately 230 degrees with the X-axis. The first lower limit part 6 can limit the left crank 2 at approximately 230 degrees to the X-axis, and the second lower limit part 7 can limit the right crank 3 at approximately 230 degrees to the X-axis. During use, the user can cycle the pedals within a range of approximately 130 to 230 degrees, ensuring the pedals are always within the most efficient angle range. Since the cranks are connected to the drive shaft 11 via a one-way wheel, which can be a one-way bearing or a ratchet, this process ensures optimal performance. The downward pedal stroke is the power stroke, and the upward pedal stroke is the freewheeling stroke. This design, where the user only pedals within a range of about 100 degrees, significantly reduces the freewheeling stroke compared to pedal systems with 360-degree circular motion. Furthermore, the pedals don't touch the ground, allowing the crank to be longer than on a regular bicycle. According to the lever principle, a longer lever arm requires less effort. Additionally, this up-and-down pedaling method is more suitable for standing riding, thus fully utilizing the rider's own weight, making riding easier and more ergonomic. Combining these three advantages, this pedaling system is more than 50% more efficient than a regular bicycle.

[0057] It is worth mentioning that the first lower limit part 6 and the second lower limit part 7 mentioned above can both be installed on the transmission mechanism 1 or on the bicycle frame, as long as they can limit the lower limit position of the crank rotation during use. The above example is only a preferred embodiment, and it is not necessary to limit the rotation at the position where the left crank 2 and the X-axis are at an angle of 230 degrees. The first lower limit part 6 can also be set at a position of 240 degrees, 210 degrees, or even 180 degrees.

[0058] In one embodiment, the drive system further includes: a first upper limit stop 6a and a second upper limit stop 7a;

[0059] The first upper limit stop 6a is provided at the third position between the transmission mechanism 1 and the left crank 2, and is used to limit the upper limit position of the rotation of the left crank 2; the second lower limit stop 7 is provided at the fourth position between the transmission mechanism 1 and the right crank 3, and is used to limit the upper limit position of the rotation of the right crank 3.

[0060] In this embodiment, referring to the previous embodiment, taking the left crank 2 side as an example, since the driving system has the highest cycling efficiency within the range of 130 to 230 degrees, the first lower limit part 6 only restricts the lower limit position of the left crank 2, without restricting the upper limit position. Users need a certain skill to master cycling within this range. However, users may exceed the 130-degree range when controlling the left crank 2, for example, raising it to 120 or 100 degrees. At 100 degrees, the lever arm is short, making cycling more strenuous and hindering efficiency. With the first upper limit part 6a, the left crank 2 is restricted to the 130-230 degree range, allowing the user to always pedal within the most efficient angle range, ensuring the driving system's cycling efficiency. The right crank 3 side is similar to the left crank 2 side and will not be described further. Similarly, the first upper limit stop 6a and the second upper limit stop 7a mentioned above can both be installed on the transmission mechanism 1 or on the bicycle frame, as long as they can limit the upper limit position of the crank rotation during use.

[0061] In one embodiment, the drive system further includes: a left torsion spring 8 and a right torsion spring 9;

[0062] One end of the left torsion spring 8 is connected to the left crank 2, and the other end is connected to the transmission mechanism 1. When the left crank 2 is between the first position and the third position, the left torsion spring 8 generates a torque from the first position to the third position.

[0063] One end of the right torsion spring 9 is connected to the right crank 3, and the other end is connected to the transmission mechanism 1. When the right crank 3 is between the second position and the fourth position, the right torsion spring 9 generates a torque from the second position to the fourth position.

[0064] In this embodiment, the left torsion spring 8 and the right torsion spring 9 function similarly. The following explanation uses the left torsion spring 8 as an example: Because the left torsion spring 8 is rotated by the torsion spring, this rotational force pushes the left crank 2 from the first position to the third position. That is, when the user drives the left crank 2 to the first position and then releases their foot, the left torsion spring 8 can push the left crank 2 from the first position to the third position. Then the user can drive the left crank 2 again to perform work, and this cycle repeats. This eliminates the need for manual force to push the left crank 2 from the first position to the third position, improving the user experience.

[0065] In one embodiment, the first one-way wheel 21 includes: a first ratchet seat 211, a first spring 212, a first ratchet 213, and a first ratchet sleeve 214; the second one-way wheel 31 includes: a second ratchet seat 311, a second spring 312, a second ratchet 313, and a second ratchet sleeve 314.

[0066] The left crank 2 is connected to the drive shaft 11 at one end with a hollow first connector 22. The first ratchet sleeve 214 is engaged inside the first connector 22. The first ratchet seat 211 is engaged with the first end 111 and sleeved inside the first ratchet sleeve 214. The first ratchet 213 is engaged on the first ratchet seat 211. One end of the first spring piece 212 abuts against the first ratchet 213, and the other end abuts against the first ratchet seat 211 to lock the first ratchet sleeve 214 in one direction.

[0067] The right crank 3 is connected to the drive shaft 11 at one end with a hollow second connector 32. The second ratchet sleeve 314 is engaged inside the second connector 32. The second ratchet seat 311 is engaged with the second end 112 and sleeved inside the second ratchet sleeve 314. The second ratchet 313 is engaged on the second ratchet seat 311. One end of the second spring 312 abuts against the second ratchet 313, and the other end abuts against the second ratchet seat 311 to lock the second ratchet sleeve 314 in one direction.

[0068] In this embodiment, the first one-way wheel 21 and the second one-way wheel 31 have similar structures. Taking the first one-way wheel 21 as an example, the first one-way wheel 21 achieves one-way rotation of the left crank 2 through the first ratchet sleeve 214 disposed inside the first connector 22, which cooperates with the first ratchet seat 211 engaged on the first end 111 of the drive shaft 11. That is, the first ratchet 213 is engaged with the first ratchet seat 211, and one end of the first spring piece 212 abuts against the first ratchet 213, and the other end abuts against the first ratchet seat 211, so that the first ratchet 213 engages with the first ratchet sleeve 214 to achieve one-way locking. (Refer to...) Figure 1 and Figure 5 In practical use, when the left crank 2 moves from top to bottom, the left crank 2 and the drive shaft 11 are locked. The left crank 2 drives the drive shaft 11 to rotate, and the drive shaft 11 performs work internally, realizing power input. When the left crank 2 moves from bottom to top, the left crank 2 and the drive shaft 11 are unlocked. The left crank 2 returns to its original position while the drive shaft 11 does not rotate. That is, the movement from bottom to top is the idle stroke of the left crank 2. It is worth mentioning that the number of the first spring plate 212 and the first ratchet 213 can be set as needed, and can be one, two, three, etc.

[0069] In one embodiment, the left crank 2 includes: 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 stop 34, and a second crank screw 35.

[0070] The first bearing 23 is sleeved on the first end 111 and snapped into the first connector 22. The first bearing block 24 is covered by the outside of the first connector 22 and is limited by the first crank screw 25 connected to the first end 111.

[0071] The second bearing 33 is sleeved on the second end 112 and snapped into the second connector 32. The second bearing stop 34 is covered by the outside of the second connector 32 and is limited by the second end 112 connected to the second crank screw 35.

[0072] In this embodiment, one or two first bearings 23 may be provided, mainly to reduce the connecting friction of the first joint 22 and reduce the load on the first one-way wheel 21. When there are two first bearings 23, one first bearing 23 can 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 in detail.

[0073] In one embodiment, the first upper limit portion 6a includes: a first limit ring 6a1, a first torsion spring 6a2, a first limit screw 6a3, and a first stop block 6a4; the second upper limit portion 7a includes: a second limit ring 7a1, a second torsion spring 7a2, a second limit screw 7a3, and a second stop block 7a4.

[0074] A first connecting post is provided on the side of the housing of the transmission mechanism 1 adjacent to the left crank 2. The outer wall of the first connecting post is provided with a first limiting block. The outer wall of the first limiting ring 6a1 is provided with a first limiting protrusion 6a11, and the inner wall is provided with a second limiting block 6a12. The first limiting ring 6a1 is sleeved on the first connecting post. One end of the first torsion spring 6a2 is connected to the first connecting post, and the other end is connected to the first limiting ring 6a1, so that the first limiting block and the second limiting block 6a12 abut against each other, and the first limiting protrusion 6a11 is located at the position that limits the left crank 2. The first stop 6a4 is covered by the outer side of the first limiting ring 6a1 and is connected to the first connecting post for limiting through the first limiting screw 6a3.

[0075] A second connecting post 13 is provided on the side of the housing of the transmission mechanism 1 adjacent to the right crank 3. The outer wall of the second connecting post 13 is provided with a third limiting block 131. The outer wall of the second limiting ring 7a1 is provided with a second limiting protrusion 7a11, and the inner wall is provided with a fourth limiting block. The second limiting ring 7a1 is sleeved on the second connecting post 13. One end of the second torsion spring 7a2 is connected to the second connecting post 13, and the other end is connected to the second limiting ring 7a1, so that the third limiting block 131 and the fourth limiting block abut against each other, and the second limiting protrusion 7a11 is located at the position that limits the right crank 3. The second stop 7a4 is covered by the outer side of the second limiting ring 7a1 and is connected to the second connecting post for limiting through the second limiting screw 7a3.

[0076] In this embodiment, the first upper limit part 6a is limited by the first torsion spring 6a2. Specifically, the first limiting ring 6a1 is sleeved with the first connecting post, and the two can rotate relative to each other. The outer side wall of the first connecting post is provided with a first limiting block, and the inner side wall of the first limiting ring 6a1 is provided with a second limiting block 6a12. The first limiting ring 6a1 can no longer rotate when the first limiting block and the second limiting block 6a12 come into contact. More specifically, the first torsion spring 6a2 applies a torque to the first limiting ring 6a1, so that the first limiting block and the second limiting block 6a12 are always in the abutting position. In this position, the first limiting protrusion 6a11 is located at the position that limits the left crank 2. The first limiting protrusion 6a11 limits the left crank 2 in the form of a protrusion structure corresponding to the first limiting protrusion 6a11 on the outer wall of the first connector 22 on the left crank 2. The limiting is achieved by the first limiting protrusion 6a11 abutting against this protrusion structure. This limiting method of the first upper limiting part 6a can be adjusted by manually rotating the lever 6a13 on the first limiting ring 6a1 to release the limiting of the first limiting protrusion 6a11 on the left crank 2, allowing the left crank 2 to rotate and fold. The structure of the second upper limiting part 7a is similar to that of the first upper limiting part 6a, and will not be described further.

[0077] In one embodiment, both the left foot pedal 4 and the right foot pedal 5 are foldable pedals.

[0078] In one embodiment, the left foot pedal 4 includes: a first folding sleeve 41, a first anti-rotation component 42, a first connecting shaft 43, and a first foot pedal 44; the right foot pedal 5 includes: a second folding sleeve 51, a second anti-rotation component 52, a second connecting shaft 53, and a second foot pedal 54.

[0079] The first folding sleeve 41 is movably sleeved on the end of the left crank 2. One end of the first connecting shaft 43 is connected to the first folding sleeve 41. The first foot pedal 44 is movably connected to the first connecting shaft 43 through a bearing. The first anti-rotation component 42 passes through the first folding sleeve 41 and is detachably snapped into the left crank 2, and limits the first folding sleeve 41.

[0080] The second folding sleeve 51 is movably sleeved on the end of the right crank 3. One end of the second connecting shaft 53 is connected to the second folding sleeve 51. The second foot pedal 54 is movably connected to the second connecting shaft 53 through a bearing. The second anti-rotation component 52 passes through the second folding sleeve 51 and is detachably snapped into the right crank 3, and limits the second folding sleeve 51.

[0081] In this embodiment, the first anti-rotation component 42 is one component or a combination of several components with a circumferential limiting structure, so as to... Figure 1 and Figure 6For example, the first anti-rotation component 42 consists of a spring piece 421, a first anti-rotation baffle 422, and a screw 423. The first anti-rotation baffle 422 has an inwardly protruding quadrilateral protrusion on its inner side, and a quadrilateral groove on the end face of the left crank 2. The quadrilateral protrusion and the quadrilateral groove are engaged, and the screw 423 passes through the first anti-rotation baffle 422 to fix it to the end of the left crank 2. In this way, the first anti-rotation baffle 422 cannot rotate circumferentially. At this time, the spring piece 421 is sandwiched between the first anti-rotation baffle 422 and the first folding sleeve 41 to increase the rotational friction of the first folding sleeve 41. That is, the first pedal 44 can only rotate when it is turned very forcefully during use. Referring to the above embodiment, the first limiting ring 6a1 is sleeved with the first connecting post. The first folding sleeve 41 and the end of the left crank 2 can also be provided with some locking blocks. That is, locking blocks that cooperate with each other are provided on the inner side wall of the first folding sleeve 41 and the outer side wall of the end of the left crank 2 to limit the first pedal 44 when it is folded outward to a position parallel to the horizontal plane. Figure 1 As shown. The structure of the right foot pedal 5 side is similar to that of the left foot pedal 4 side, so it will not be described again.

[0082] In one embodiment, the first lower limit portion 6 is a first elastic limit block 61 connected to the bottom of the housing of the transmission mechanism 1 adjacent to the left crank 2; the second lower limit portion 7 is a second elastic limit block 71 connected to the bottom of the housing of the transmission mechanism 1 adjacent to the right crank 3.

[0083] In this embodiment, the first elastic limiting block 61 is made of an elastic material, such as rubber, silicone, or a spring-connected iron block. For example, the first elastic limiting block 61 is made of rubber and is connected to the limiting shaft 14 located on the housing of the transmission mechanism 1 by auxiliary fasteners such as the limiting rubber fixing sleeve 62 and bolts 63. Thus, when the left crank 2 is pressed to the lower limit position, it abuts against the first elastic limiting block 61, and the first elastic limiting block 61 generates an elastic force for cushioning, enhancing user comfort. The second elastic limiting block 71 is similar to the first elastic limiting block 61 and will not be described further.

[0084] To achieve one or more of the above objectives or other objectives, the present invention also provides a bicycle, the bicycle including any of the drive systems described above. Figure 9 One style of the aforementioned bicycle is shown.

[0085] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A drive system, characterized in that, Applied to bicycles, it includes: 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, wherein the transmission mechanism is connected to the front wheel of the bicycle; The transmission mechanism is provided with a transmission shaft, which has a first end located on one side of the transmission mechanism and a second end located on the other side of the transmission mechanism. One end of the left crank is connected to the first end through a first one-way wheel, and the other end of the left crank is connected to the left pedal. One end of the right crank is connected to the second end through a second one-way wheel, and the other end of the right crank is connected to the right pedal. The first lower limit part is disposed at a first position between the transmission mechanism and the left crank, and is used to limit the lower limit position of the rotation of the left crank; the second lower limit part is disposed at a second position between the transmission mechanism and the right crank, and is used to limit the lower limit position of the rotation of the right crank; with the origin of the coordinate system located on the transmission shaft and the X-axis pointing towards the front of the vehicle, the lower limit positions of the left and right cranks are set at an angle of 180 degrees to 240 degrees with respect to the horizontal plane; The drive system further includes: a first upper limit stop and a second upper limit stop; The first upper limit stop is disposed at a third position between the transmission mechanism and the left crank, and is used to limit the upper limit position of the rotation of the left crank; the second lower limit stop is disposed at a fourth position between the transmission mechanism and the right crank, and is used to limit the upper limit position of the rotation of the right crank. The left crank is restricted to move within a range of 130 degrees to 230 degrees by the first upper limit part and the first lower limit part, and the right crank is restricted to move within a range of 130 degrees to 230 degrees by the first upper limit part and the first lower limit part. The first upper limit part includes: a first limit ring, a first torsion spring, a first limit screw, and a first stop; the second upper limit part includes: a second limit ring, a second torsion spring, a second limit screw, and a second stop; The transmission mechanism housing has a first connecting post on the side adjacent to the left crank. The outer wall of the first connecting post has a first limiting block, the outer wall of the first limiting ring has a first limiting protrusion, and the inner wall has a second limiting block. The first limiting ring is sleeved on the first connecting post. One end of the first torsion spring is connected to the first connecting post, and the other end is connected to the first limiting ring, so that the first limiting block and the second limiting block abut against each other, and the first limiting protrusion is located at the position that limits the left crank. The first stop is covered by the outer side of the first limiting ring and is limited by the first limiting screw connected to the first connecting post. The transmission mechanism housing has a second connecting post on the side adjacent to the right crank. The outer wall of the second connecting post has a third limiting block, the outer wall of the second limiting ring has a second limiting protrusion, and the inner wall has a fourth limiting block. The second limiting ring is sleeved on the second connecting post. One end of the second torsion spring is connected to the second connecting post, and the other end is connected to the second limiting ring, so that the third limiting block and the fourth limiting block abut against each other, and the second limiting protrusion is located at the position that limits the right crank. The second stop is covered by the outer side of the second limiting ring and is limited by the second limiting screw connected to the second connecting post.

2. The drive system according to claim 1, characterized in that, The drive system also includes: a left torsion spring and a right torsion spring; One end of the left torsion spring is connected to the left crank, and the other end is connected to the transmission mechanism. When the left crank is between the first position and the third position, the left torsion spring generates a torque from the first position to the third position. One end of the right torsion spring is connected to the right crank, and the other end is connected to the transmission mechanism. When the right crank is between the second and fourth positions, the right torsion spring generates a torque from the second position to the fourth position.

3. The drive system according to claim 1, characterized in that, The first one-way wheel includes: a first ratchet seat, a first spring, a first ratchet, and a first ratchet sleeve; the second one-way wheel includes: a second ratchet seat, a second spring, a second ratchet, and a second ratchet sleeve; The left crank is connected to one end of the drive shaft and has a hollow first connector. The first ratchet sleeve is engaged inside the first connector. The first ratchet seat is engaged with the first end and sleeved inside the first ratchet sleeve. The first ratchet is engaged on the first ratchet seat. One end of the first spring abuts against the first ratchet and the other end abuts against the first ratchet seat to lock the first ratchet sleeve in one direction. The right crank is connected to one end of the drive shaft and has a hollow second connector. The second ratchet sleeve is engaged inside the second connector. The second ratchet seat is engaged with the second end and sleeved inside the second ratchet sleeve. The second ratchet is engaged on the second ratchet seat. One end of the second spring abuts against the second ratchet and the other end abuts against the second ratchet seat to lock the second ratchet sleeve in one direction.

4. The drive system according to claim 3, characterized in that, The left crank also includes: a first bearing, a first bearing stop, and a first crank screw; the right crank also includes: a second bearing, a second bearing stop, and a second crank screw; The first bearing is sleeved on the first end and snapped into the first connector. The first bearing stop is covered by the outside of the first connector and is limited by the first crank screw connected to the first end. The second bearing is sleeved onto the second end and snapped into the second connector. The second bearing stop is covered by the outside of the second connector and is limited by the second crank screw connected to the second end.

5. The drive system according to claim 1, characterized in that, Both the left and right foot pedals are foldable.

6. The drive system according to claim 5, characterized in that, The left foot pedal includes: a first folding sleeve, a first anti-rotation component, a first connecting shaft, and a first foot pedal; the right foot pedal includes: a second folding sleeve, a second anti-rotation component, a second connecting shaft, and a second foot pedal; The first folding sleeve is movably fitted onto the end of the left crank, one end of the first connecting shaft is connected to the first folding sleeve, the first foot pedal is movably connected to the first connecting shaft through a bearing, and the first anti-rotation component passes through the first folding sleeve and is detachably engaged with the left crank, thereby limiting the position of the first folding sleeve. The second folding sleeve is movably fitted onto the end of the right crank. One end of the second connecting shaft is connected to the second folding sleeve. The second foot pedal is movably connected to the second connecting shaft through a bearing. The second anti-rotation component passes through the second folding sleeve and is detachably engaged with the right crank, thus limiting the position of the second folding sleeve.

7. The drive system according to claim 1, characterized in that, The first lower limit part is a first elastic limit block connected to the bottom of the transmission mechanism housing adjacent to the left crank; the second lower limit part is a second elastic limit block connected to the bottom of the transmission mechanism housing adjacent to the right crank.

8. A bicycle, characterized in that, The bicycle includes the drive system as described in any one of claims 1 to 7.

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