A bicycle

Abstract

The present invention relates to the technical field of bicycles, and in particular to a bicycle, comprising a frame, a rear wheel, a transmission mechanism, a pedal assembly and a reset mechanism. The rear wheel is rotatably connected to the frame, and the transmission mechanism is arranged on the rear wheel for driving the rear wheel to operate. The pedal assembly is transmission-connected to the transmission mechanism for driving the transmission mechanism to transmit, and the reset mechanism is connected to the pedal assembly for driving the pedal assembly to reset. The motion trajectory of the pedal assembly is a fan-shaped reciprocating motion along the outer peripheral surface of the rear wheel with the transmission mechanism as the center. The user can ride the bicycle in a standing position to avoid affecting the comfort due to the squeezing of the buttocks by the seat cushion. In the event of a sudden danger, the user can immediately get off the bicycle due to the standing position, which is safer.

Description

Technical Field

[0001] The present invention relates to the field of transportation tools, in particular to a bicycle. Background Art

[0002] In order to facilitate people's travel, bicycles came into being. Users sit on the seat and pedal to drive the bicycle forward. Long-term riding will squeeze the buttocks, which makes riding uncomfortable. In addition, due to the sitting posture restriction, the seat presses against the user's buttocks, resulting in the user being unable to get off the bicycle when a safety incident occurs, which is very dangerous. Therefore, it is urgent to design a bicycle that is easy for users to get off and has a high safety factor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a bicycle, aiming to solve the problem in the prior art that the bicycle is restricted by the seat cushion and the user cannot get off the bicycle in time when a safety incident occurs.

[0004] The bicycle provided by the present invention comprises: a frame, a rear wheel, a pedal assembly and a reset structure, wherein the rear wheel is rotatably connected to the frame, the pedal assembly is transmission-connected to the rear wheel, and the pedal assembly is used to drive the rear wheel to rotate; a transmission mechanism is arranged on the rear wheel and is transmission-connected to the rear wheel and the pedal assembly, the pedal assembly drives the rear wheel to operate by driving the transmission mechanism, the transmission mechanism comprises a one-way transmission component, which is transmission-connected to the rear wheel and the pedal assembly, the one-way transmission component is used to prevent the torque generated when the pedal assembly is reset from being transmitted to the rear wheel, and to prevent the torque of the rear wheel from being transmitted to the pedal assembly when the bicycle moves forward, the reset structure is connected to the pedal assembly, and the reset mechanism is used to drive the pedal assembly to reset, wherein the motion trajectory of the pedal assembly is to make a fan-shaped reciprocating motion along the outer peripheral surface of the rear wheel with the transmission mechanism as the center of the circle, so as to drive the transmission mechanism to transmit.

[0005] Furthermore, the transmission mechanism also includes a speed change assembly, which is connected to the pedal assembly and the rear wheel, and the torque input by the pedal assembly is changed by the speed change assembly and then transmitted to the rear wheel.

[0006] Furthermore, the transmission mechanism also includes a first rotating shaft, which is connected to the frame, and the pedal assembly is arranged on the first rotating shaft and rotates around the first rotating shaft. The speed change assembly includes: a fan gear, a second rotating shaft, a first gear, a second gear and a third gear. The fan gear is fixedly connected to the pedal assembly, and the fan gear rotates around the first rotating shaft. The second rotating shaft is transmission-connected to the fan gear. The first gear is arranged on the second rotating shaft, and the first gear is meshed with the fan gear. The first gear rotates around the second rotating shaft. The second gear is arranged on the second rotating shaft, and the second gear rotates around the second rotating shaft. The third gear is connected to the rear wheel, and the third gear is transmission-connected to the second gear.

[0007] Furthermore, the one-way transmission component is a one-way bearing or a ratchet assembly.

[0008] Furthermore, the sector gear is provided with a first protrusion, and the bicycle also includes a reversing mechanism, which includes: a first elastic member and a limiting member, one end of the first elastic member is connected to the frame, and the limiting member is connected to the other end of the first elastic member, and when the sector gear is disengaged from the first gear, the limiting member abuts against the first protrusion to prevent the sector gear from resuming engagement with the first gear.

[0009] Further, the transmission mechanism also includes a third rotating shaft, the third rotating shaft is connected to the frame, the pedal assembly is arranged on the third rotating shaft and rotates around the third rotating shaft, and the one-way transmission component is a ratchet assembly, wherein the ratchet assembly includes: a ratchet wheel, a pawl, a second elastic member and a ratchet, the ratchet wheel is fixedly connected to the pedal assembly and rotates around the third rotating shaft, one end of the pawl is rotatably connected to the ratchet wheel, one end of the second elastic member is connected to the ratchet wheel, and the other end is connected to the pawl, the second elastic member causes the other end of the pawl to extend out of the ratchet wheel, and a first gear ring is provided on the inner wall of the ratchet wheel, when the ratchet wheel rotates clockwise, the pawl is meshed with the first gear ring, and when it rotates counterclockwise, the pawl is disengaged from the first gear ring; or, when the ratchet wheel rotates counterclockwise, the pawl is meshed with the first gear ring, and when it rotates clockwise, the pawl is disengaged from the first gear ring.

[0010] Furthermore, the transmission mechanism also includes: at least one set of planetary gear assemblies, the planetary gear assemblies are drivingly connected to the ratchet and the rear wheel, and torque is transmitted between the ratchet and the rear wheel through the planetary gear assemblies.

[0011] Furthermore, the planetary gear assembly includes: a second ring gear, a first planetary wheel carrier, a first planetary wheel and a first sun gear, the second ring gear is fixedly connected to the frame, the first planetary wheel carrier is fixedly connected to the ratchet, the first planetary wheel is rotatably connected to the first planetary wheel carrier and meshes with the second ring gear, the first sun gear is fixedly connected to the rear wheel, the first sun gear rotates around the first rotating shaft, and the first sun gear is drivingly connected to the first planetary wheels.

[0012] Furthermore, it also includes a pawl pressure plate, which is fixedly connected to the second gear ring. When the bicycle is reversed, the pawl rotates toward the pawl pressure plate until the pawl pressure plate is pressed against the pawl, so that the pawl is disengaged from the first gear ring.

[0013] Further, the reset mechanism is a foot hook, which is arranged on the pedal assembly; or, the reset mechanism is a third elastic member, one end of the third elastic member is connected to the frame, and the other end is connected to the pedal assembly, when the pedal assembly rotates, the third elastic member produces elastic deformation, and when the third elastic member restores the elastic deformation, it drives the pedal assembly to reset.

[0014] The beneficial effects of the present invention are as follows: the user utilizes the pedal assembly to drive the transmission mechanism to transmit power, and finally transmits power to the rear wheel, wherein the pedal assembly takes the transmission mechanism as the center of the circle and performs a fan-shaped reciprocating motion along the outer peripheral surface of the rear wheel, so that the user can ride the bicycle in a standing position, avoiding the impact of comfort caused by the seat cushion squeezing the buttocks. In the event of sudden danger, the user can immediately get off the bicycle due to the standing riding position, which is safer, and it is more convenient and quicker to get off the bicycle normally than an ordinary bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic diagram of the overall structure of another embodiment of the present invention;

[0018] Figure 3 It is an exploded view of the transmission structure of the present invention;

[0019] Figure 4 is an exploded view of a transmission structure of another embodiment of the present invention;

[0020] Figure 5 It is a schematic diagram of the transmission structure and the reversing structure of the present invention;

[0021] Figure 6 It is a schematic diagram of the transmission structure and the reversing structure of the present invention;

[0022] Figure 7 It is a schematic diagram of a transmission structure and a reversing structure of another embodiment of the present invention;

[0023] Figure 8 It is a schematic diagram of the dynamic structure and the reset structure of the present invention;

[0024] Fig. 9 It is a schematic diagram of a transmission structure and a reset structure of another embodiment of the present invention;

[0025] Fig.10 It is a schematic diagram of a transmission structure and a reset structure of another embodiment of the present invention;

[0026] The reference numerals in the figures are:

[0027] 1. Frame; 2. Rear wheel; 21. Hub; 3. Transmission mechanism; 31. One-way transmission member; 311. Ratchet wheel; 312. Ratchet; 313. Ratchet; 3131. First ring gear; 32. Speed ​​change assembly; 321. Sector gear; 3211. First protrusion; 322. Second shaft; 323. First gear; 324. Second gear; 325. Third gear; 33. First shaft; 34. Third shaft; 35. Planetary gear assembly; 351. Second ring gear; 352. First planetary wheel carrier; 353. First Planetary gear; 354, first sun gear; 355, second sun gear; 356, second planetary gear carrier; 357, second planetary gear; 4, pedal assembly; 5, reset mechanism; 51, foot hook; 52, third elastic member; 53, first reset gear; 54, second reset gear; 55, fourth rotating shaft; 56, fifth rotating shaft; 57, guide rod; 58, sixth rotating shaft; 59, limit block; 6, reversing mechanism; 61, limit member; 62, guide member; 7, ratchet pressure plate; 8, limit baffle; 9, handlebar; 91, folding device. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0029] The present invention provides a standing bicycle, such as Figure 1-Figure 7As shown, the bicycle comprises a frame 1, a rear wheel 2, a transmission mechanism 3, a pedal assembly 4 and a reset mechanism 5. The rear wheel 2 is rotatably connected to the frame 1. The transmission mechanism 3 is arranged on the rear wheel 2 and is in transmission connection with the rear wheel 2 and the pedal assembly 4. The pedal assembly 4 drives the transmission mechanism 3 to drive the rear wheel 2 to operate. The transmission mechanism 3 comprises a one-way transmission member 31, which is in transmission connection with the rear wheel 2 and the pedal assembly 4. The one-way transmission member 31 is used to prevent the torque generated when the pedal assembly 4 is reset from being transmitted to the rear wheel 2, and to prevent the torque of the rear wheel 2 from being transmitted to the pedal assembly 4 when the bicycle moves forward. The reset structure 5 is connected to the pedal assembly 4, and the reset mechanism 5 is used to drive the pedal assembly 4 to reset; wherein, the motion trajectory of the pedal assembly 4 is to make a fan-shaped reciprocating motion along the outer peripheral surface of the rear wheel 2 with the transmission mechanism 3 as the center of the circle, so as to drive the transmission mechanism 3 to transmit.

[0030] By implementing this embodiment, the user utilizes the pedal assembly 4 to drive the transmission mechanism 3, and finally transmits the power to the rear wheel 2, wherein the pedal assembly 4 takes the transmission mechanism 3 as the center and performs a fan-shaped reciprocating motion along the outer peripheral surface of the rear wheel 2, so that the user can ride the bicycle in a standing position to avoid the seat cushion squeezing the buttocks and affecting the comfort. In case of sudden danger, the user can immediately get off the bicycle because of the standing riding position, which is safer, and it is more convenient and quicker to get off the bicycle normally than ordinary bicycles.

[0031] There are many one-way transmission components 31, such as ratchet assemblies and one-way bearings, which can be selected according to actual needs during implementation.

[0032] In this embodiment, the rear wheel 2 is provided with a hub 21, and the rear wheel 2 is rotatably connected to the frame 1 through the hub 21. The hub, commonly known as the "hub barrel", is a barrel connected to the spokes outside the axle, usually also called the axle skin. According to different arrangements of the number of spokes, there are generally 3-way and 5-way arrangements.

[0033] In one embodiment, the rear wheel 2 may be an integrated wheel, which is not provided with a hub 21 , but has a central structure equivalent to the hub 21 .

[0034] In one embodiment, if Figure 1 , Figure 4 As shown, the transmission mechanism 3 further includes a speed change assembly 32, which is connected to the pedal assembly 4 and the hub 21. The torque input by the pedal assembly 4 is changed by the speed change assembly 32 and then transmitted to the hub 21. The speed change transmission is realized by the speed change assembly 32. When the rotation angle of the pedal assembly 4 remains unchanged, the riding speed can be increased or decreased by implementing this embodiment.

[0035] In a specific embodiment, Figure 1 , Figure 3 , Figure 4As shown, the transmission mechanism 3 also includes a first rotating shaft 33, which is connected to the frame 1, and the pedal assembly 4 is arranged on the first rotating shaft 33 and rotates around the first rotating shaft 33. The speed change assembly 32 includes a sector gear 321, a second rotating shaft 322, a first gear 323, a second gear 324 and a third gear 325. The sector gear 321 is fixedly connected to the pedal assembly 4, and the sector gear 321 rotates around the first rotating shaft 33; the second rotating shaft 322 is transmission-connected to the sector gear 321. The first gear 323 is arranged on the second rotating shaft 322, and the first gear 323 meshes with the sector gear 321, and the first gear 323 rotates around the second rotating shaft 322. The second gear 324 is arranged on the second rotating shaft 322, and the second gear 324 rotates around the second rotating shaft 322. The third gear 325 is connected to the hub 21, and the third gear 325 is transmission-connected to the second gear 324.

[0036] Variable speed transmission is achieved by gears of different sizes. When the rotation angle of the pedal assembly 4 remains unchanged, the riding speed can be increased or decreased by implementing this embodiment.

[0037] Preferably, the third gear 325 meshes with the second gear 324, and the second gear 324 is disposed on the second rotating shaft 322 through the one-way transmission component 31. Four gears are used to complete the speed transmission, which has a relatively simple structure, high transmission efficiency, and sufficient power.

[0038] In one embodiment, if Figure 1 , Figure 4 , Figure 5 As shown, the sector gear 321 is provided with a first protrusion 3211, and the bicycle further comprises a reversing mechanism 6, which comprises: a first elastic member and a stopper 61. One end of the first elastic member is connected to the frame 1, and the stopper 61 is connected to the other end of the first elastic member. When the sector gear 321 is disengaged from the first gear 323, the stopper 61 abuts against the first protrusion 3211 to prevent the sector gear 321 from resuming engagement with the first gear 323.

[0039] When the user operates the bicycle to reverse, the first protrusion 3211 moves toward the limit member 61 until the first protrusion 3211 abuts against the limit member 61. Under the action of the first elastic member, the elastic deformation is generated to drive the limit member 61 to contract. At this time, the bicycle continues to reverse, driving the first protrusion 3211 to move from one side of the limit member 61 to the other side of the limit member 61 until the fan gear 321 is disengaged from the first gear 323. The first elastic member restores the elastic deformation to drive the limit member 61 to extend, and the limit member 61 abuts against the first protrusion 3211, blocking the fan gear 321 and the first gear 323 from resuming engagement. As a result, the torque of the hub 21 cannot be transmitted to the pedal assembly 4, and the first gear 323 can continue to rotate in the opposite direction without being affected by the rotation range of the fan gear 321.

[0040] When the sector gear 321 needs to resume meshing with the first gear 323, the power input piece is used to drive the sector gear 321 to rotate. Under the action of the force, the first elastic piece is elastically deformed to drive the limit piece 61 to contract. The power input piece continues to drive the sector gear 321 to rotate, driving the first protrusion 3211 to move from one side of the limit piece 61 to the other side of the limit piece 61. The first elastic piece resumes its elastic deformation to drive the limit piece 61 to extend, and the sector gear 321 resumes meshing with the first gear 323.

[0041] In this embodiment, if Figure 5 As shown, the reversing mechanism 6 also includes a guide member 62, which is fixedly connected to the frame 1. One end of the first elastic member is connected to the guide member 62, and the other end is connected to the limit member 61, which limits the movement trajectory of the limit member 61 and prevents the limit member 61 and the first elastic member from swinging due to the impact of the first protrusion 3211, thereby reducing noise and increasing the stability of the structure.

[0042] In one embodiment, if Figure 4 , Figure 7 As shown, the transmission mechanism 3 also includes a third rotating shaft 34, which is connected to the frame 1. The pedal assembly 4 is arranged on the third rotating shaft 34 and rotates around the third rotating shaft 34. The one-way rotating member 31 is a ratchet assembly, which includes a ratchet wheel 311, a ratchet 312, a second elastic member and a ratchet wheel 313. The ratchet wheel 311 is fixedly connected to the pedal assembly 4 and rotates around the third rotating shaft 34. One end of the ratchet 312 is rotatably connected to the ratchet wheel 311, one end of the second elastic member is connected to the ratchet wheel 311, and the other end is connected to the ratchet 312. The second elastic member allows the other end of the ratchet 312 to extend out of the ratchet wheel 311. The inner wall of the ratchet wheel 313 is provided with a first gear ring 3131. When the ratchet wheel 311 rotates clockwise, the ratchet 312 engages with the first gear ring 3131, and disengages from the first gear ring 3131 when it rotates counterclockwise. Alternatively, when the ratchet wheel 311 rotates counterclockwise, the ratchet 312 engages with the first gear ring 3131, and disengages from the first gear ring 3131 when it rotates clockwise. The rear wheel 2 and the ratchet wheel 313 transmit torque through the hub 21.

[0043] In a specific embodiment, Figure 4 , Figure 7 As shown, the transmission mechanism 3 further includes at least one set of planetary gear assemblies 35 , which are transmission-connected to the ratchet 313 and the hub 21 , and torque is transmitted between the ratchet 313 and the hub 21 via the planetary gear assemblies 31 .

[0044] The planetary gear assembly 35 is used for speed change, so that the entire speed change structure can rotate around the same shaft. The structure is very compact and is particularly suitable for shared bicycles, which require a protective shell to protect the transmission structure to prevent human damage to the bicycle. The planetary gear assembly 35 has a high load-bearing capacity, a long service life, and smooth operation.

[0045] Furthermore, if Figure 2 , Figure 4 As shown, the planetary gear assembly includes a second ring gear 351, a first planetary wheel carrier 352, a first planetary wheel 353 and a first sun wheel 354. The second ring gear 354 is fixedly connected to the frame 1, the first planetary wheel carrier 352 is fixedly connected to the ratchet 313, the first planetary wheel 353 is rotationally connected to the first planetary wheel carrier 352 and meshes with the second ring gear 351, the first sun wheel 354 is fixedly connected to the hub 3, the first sun wheel 354 rotates around the first rotating shaft 41, and the first sun wheel 354 is drivingly connected to the first planetary wheel 353.

[0046] Furthermore, a second set of planetary gear components is provided, including a third ring gear, a second sun gear 355, a second planetary gear carrier 356 and a second planetary gear 357. The third ring gear is fixedly connected to the frame 1, the second sun gear 355 is meshed with the first planetary gear 355, the second planetary gear carrier 356 is fixedly connected to the second sun gear 355, the second planetary gear 357 is rotatably connected to the first planetary gear carrier 352, and is meshed with the third ring gear and the first sun gear 354, wherein the second ring gear 351 and the third ring gear are formed separately or integrally, and this embodiment adopts an integrally formed solution, which reduces the processing cost and simplifies the installation steps.

[0047] There are many forms of planetary gear transmission, such as: fixed ring gear, planetary gear carrier as input end, sun gear as output end, fixed planetary gear carrier, planetary gear as input end, sun gear as output end, fixed sun gear, ring gear as input end, planetary gear carrier as output end, etc. Those skilled in the art can make adjustments as needed.

[0048] In one embodiment, if Figure 2 , Figure 7 As shown, the bicycle also includes a pawl pressure plate 7, which is fixedly connected to the second gear ring 351. When the bicycle is reversed, the pawl 312 rotates toward the pawl pressure plate 7 until the pawl pressure plate 7 is crimped onto the pawl 312, so that the pawl 312 is disengaged from the first gear ring 3131, and the pawl 312 is blocked from resuming the meshing relationship with the first gear ring 3131, so that the torque of the hub 21 cannot be transmitted to the pedal assembly 4. Therefore, when reversing, the bicycle will not be limited by the rotation range of the pedal assembly 4, thereby achieving free reversing.

[0049] In one embodiment, if Figure 1, 2 As shown, the bicycle further includes a limit baffle 8 for limiting the rotation range of the pedal assembly 4, and the limit baffle 8 is fixedly connected to the frame 1. When the pedal assembly 4 is stepped on to the bottom, the limit baffle 8 can provide support, and the user can feel free to exert force when stepping on the pedal assembly 4 without deliberately retracting the force.

[0050] After applying force to the pedal assembly 4, the pedal assembly 4 needs to be reset before the next pedaling. The reset mechanism 5 is provided to facilitate the reset of the pedal assembly 4, making riding more convenient and comfortable. Among them, there are many forms of the reset mechanism 5, as long as it can reset the pedal assembly 2. The following lists the preferred embodiments for illustration.

[0051] In one embodiment, if Figure 1 , Figure 3 , Figure 4 As shown, the reset mechanism 5 is a foot hook 51, which is arranged on the pedal assembly 4. The user only needs to lift his leg to hook the foot hook 51, thereby driving the pedal assembly 4 to rotate and reset, which has low cost and reliable structure.

[0052] In a specific embodiment, the foot hook 51 is in a “┌” shape or a “┐” shape, and the semi-wrapped foot hook design makes it more convenient for the user to get off the vehicle.

[0053] In one embodiment, if Figure 2 , Figure 8 , Fig. 9 , Fig.10 As shown, the reset mechanism 5 includes a third elastic member 52, one end of the third elastic member 52 is connected to the bicycle frame 1, and the other end is connected to the pedal assembly 4. When the pedal assembly 4 rotates, the third elastic member 52 is elastically deformed, and when the third elastic member 52 recovers the elastic deformation, it drives the pedal assembly 4 to reset. When the force on the pedal assembly 4 stops, the third elastic member 52 drives the third elastic member 52 to recover the elastic deformation through the internal stress, thereby driving the pedal assembly 4 to reset. There is no need for the user to apply force to drive the pedal assembly 4 to reset. The structure is simple and reliable, and it is more comfortable to use.

[0054] In a specific embodiment, the third elastic member 52 is a tension spring or a tension rope, one end of which is connected to the bicycle frame 1, and the other end is connected to the pedal assembly 4. When a force is applied to the pedal assembly 4, the tension spring or the tension rope is pulled to cause elastic deformation, and when the force is stopped, the tension spring or the tension rope pulls the pedal assembly 4 to return to its original position.

[0055] Furthermore, the reset mechanism 5 further comprises an adjusting member, which in this embodiment is an adjusting screw, through which the tension spring or tension rope is connected to the frame 1. The adjusting member is adjusted to adjust the length of the tension spring or tension rope so as to adjust the elastic force to an adaptive value.

[0056] Furthermore, in order to increase the elastic force, the number of the elastic members may be increased.

[0057] In one embodiment, if Figure 1 , Fig. 9 As shown, the third elastic member 52 is a torsion spring, one rotating arm of the torsion spring is connected to the pedal assembly 4, and the other rotating arm is connected to the frame 1. When force is applied to the pedal assembly 4, the rotating arm is driven to move toward the other rotating arm, and the torsion spring undergoes elastic deformation. When the force on the pedal assembly 4 stops, the torsion spring restores the elastic deformation and drives the pedal assembly 4 to return to its original position.

[0058] In one embodiment, if Figure 2 , Fig.10 As shown, the third elastic member 62 is a compression spring. When force is applied to the pedal assembly 4, the compression spring is compressed to cause elastic deformation. When force is stopped on the pedal assembly 4, the compression spring recovers its elastic deformation to drive the pedal assembly 4 to return to its original position.

[0059] In a specific embodiment, Figure 1 , Fig.10 As shown, the reset mechanism 5 also includes a first reset gear 53, a second reset gear 51, a fourth rotating shaft 55, a fifth rotating shaft 56, a guide rod 57 and a sixth rotating shaft 58. The first reset gear 53 is fixedly connected to the pedal assembly 4. One end of the second reset gear 54 is meshed with the first reset gear 53, and the other end is provided with a top block rotatably connected to the guide rod 57, and a first through hole is provided in the middle of the second reset gear 54. The fourth rotating shaft 55 is passed through the first through hole and fixedly connected to the frame 1, and the second reset gear 54 is provided on the fourth rotating shaft 55, and is rotatably connected with the fourth rotating shaft 55 as the axis. The compression spring is sleeved on the guide 57, and one end of the guide rod 57 is rotatably connected to the second reset gear 54 through the fifth rotating shaft 56, and the other end of the guide rod 57 is rotatably connected to the frame 1 through the sixth rotating shaft 58.

[0060] Furthermore, the reset mechanism also includes a limit block 59, which abuts against the compression spring. The limit block 59 is provided with a threaded hole, and the circumferential surface of the guide rod 57 is provided with a thread matching the threaded hole. The limit block 59 is connected to the guide rod 57 through the threaded hole. The limit block 59 is rotated to adjust the length of the compression spring, thereby adjusting the elastic force.

[0061] Furthermore, if Figure 1-Figure 7 As shown, the bicycle of this embodiment is provided with two pedal assemblies 4, two transmission mechanisms 3, and two reset mechanisms 5. Each pedal assembly 4 is used in conjunction with a transmission mechanism 3 and a reversing mechanism 6 respectively. When riding, the user can pedal alternately or simultaneously. The form of the bicycle in this application includes but is not limited to a tandem bicycle, an electric bicycle, and a gym spinning bike.

[0062] In one embodiment, if Figure 1 , Figure 2As shown, the standing bicycle also includes a handlebar 9 and a folding device 91 arranged on the handlebar 9. The handlebar 9 is connected to the front wheel of the standing bicycle for controlling the direction. The folding device 91 is used to fold the handlebar 9 to reduce the space occupied by the standing bicycle for easy carrying.

[0063] The embodiment of the present invention shows a bicycle, such as Figure 1-Figure 7 As shown, the transmission mechanism 3 is driven by the pedal assembly 4, and finally the power is transmitted to the rear wheel 2, wherein the pedal assembly 4 takes the transmission mechanism 3 as the center and performs a fan-shaped reciprocating motion along the outer peripheral surface of the rear wheel 2, so that the user can ride the bicycle in a standing position to avoid the comfort being affected by the squeezing of the buttocks by the seat cushion. In case of sudden danger, the user can immediately get off the bicycle because of the standing riding position, which is safer.

[0064] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the protection scope of the claims attached to the present invention.

Claims

1. A bicycle, characterized in that: include: Frame; a rear wheel rotatably connected to the frame; A pedal assembly, which is transmission-connected to the rear wheel, and is used to drive the rear wheel to rotate; A transmission mechanism is arranged on the rear wheel and is in transmission connection with the rear wheel and the pedal assembly. The pedal assembly drives the transmission mechanism to drive the rear wheel. The transmission mechanism includes a one-way transmission member, which is in transmission connection with the rear wheel and the pedal assembly. The one-way transmission member is used to prevent the torque generated when the pedal assembly is reset from being transmitted to the rear wheel, and to prevent the torque of the rear wheel from being transmitted to the pedal assembly when the bicycle moves forward. The transmission mechanism also includes a speed change assembly and a first rotating shaft. The speed change assembly is connected to the pedal assembly and the rear wheel. The torque input by the pedal assembly is transmitted to the rear wheel via the speed change assembly. The first rotating shaft is connected to the frame, the pedal assembly is arranged on the first rotating shaft, and rotates with the first rotating shaft as the axis; the speed change assembly includes a fan gear, a second rotating shaft and a first gear, the fan gear is fixedly connected to the pedal assembly, the fan gear rotates with the first rotating shaft as the axis, and the fan gear is provided with a first protrusion; the second rotating shaft is drivingly connected to the fan gear; the first gear is arranged on the second rotating shaft, the first gear is meshed with the fan gear, the first gear rotates with the second rotating shaft as the axis, and the first gear is drivingly connected to the rear wheel; A reset mechanism connected to the pedal assembly, the reset mechanism being used to drive the pedal assembly to reset; A reversing mechanism, comprising a first elastic member, a limiting member and a guiding member, wherein one end of the first elastic member is connected to the vehicle frame; the limiting member is connected to the other end of the first elastic member, and when the sector gear is disengaged from the first gear, the limiting member abuts against the first protrusion to prevent the sector gear from resuming engagement with the first gear; the guiding member is fixedly connected to the vehicle frame, and the guiding member is connected to the first elastic member to limit the movement trajectory of the limiting member; The movement trajectory of the pedal assembly is to make a fan-shaped reciprocating motion along the outer peripheral surface of the rear wheel with the transmission mechanism as the center, so as to drive the transmission mechanism to transmit.

2. The bicycle according to claim 1, characterized in that: The speed change assembly comprises: A second gear, which is disposed on the second rotating shaft, and the second gear rotates around the second rotating shaft; A third gear is connected to the rear wheel, and the third gear is drivingly connected to the second gear.

3. The bicycle according to claim 1, characterized in that: The reset mechanism is a foot hook, and the foot hook is arranged on the pedal assembly; or, The reset mechanism is a third elastic member, one end of the third elastic member is connected to the frame, and the other end is connected to the pedal assembly. When the pedal assembly rotates, the third elastic member generates elastic deformation, and when the third elastic member recovers the elastic deformation, it drives the pedal assembly to reset.

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