CN210761151U - Novel chainless double-speed-changing bicycle - Google Patents

Abstract

The utility model discloses a novel two variable speed bicycles of chainless formula contains preceding variable speed rim plate, back variable speed rim plate and speed governing main shaft, preceding variable speed rim plate cover is established on variable speed bicycle's pedal epaxial, back variable speed rim plate cover is established at variable speed bicycle's rear wheel, the speed governing main shaft sets up between preceding variable speed rim plate and the back variable speed rim plate, and speed governing main shaft one end with preceding variable speed rim plate meshes mutually and connects, the other end with back variable speed rim plate meshes mutually and connects, preceding variable speed rim plate realizes adjusting the two variable speeds in the many gears position of variable speed bicycle pedal position and rear wheel position with back variable speed rim plate under the effect of speed governing main shaft. The utility model has the advantages that: simple structure, long service life, high transmission efficiency, high force conversion rate and labor saving in riding, and can realize multi-gear double-speed change adjustment of the pedal position and the rear wheel position.

Description

Novel chainless double-speed-changing bicycle

Technical Field

The utility model relates to a bicycle field, specific saying so relates to a novel chainless formula double variable speed bicycle.

Background

With the popularization of the low-carbon environment-friendly life concept, the bicycle is not only a vehicle but also a healthy and fashionable life style. Most of the existing bicycles adopt a chain transmission mode to provide advancing power for the bicycles, and have no variable speed regulation function, the riding is laborious, the experience is not very good, the chain is frequently dropped, the failure is very easy to occur, and the later maintenance cost is higher; although some bicycles with variable speed adjustment function are available on the market, most of them have complicated structure and high price, and are not accepted by the general public.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel two variable speed bicycles of no chain formula for solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a novel two variable speed bicycles of chainless formula, contains preceding variable speed rim plate, back variable speed rim plate and speed governing main shaft, preceding variable speed rim plate cover is established on variable speed bicycle's pedal epaxial, back variable speed rim plate cover is established on variable speed bicycle's rear axle, the speed governing main shaft sets up between preceding variable speed rim plate and the back variable speed rim plate, and speed governing main shaft one end with preceding variable speed rim plate meshes mutually and connects, the other end with back variable speed rim plate meshes mutually and connects, preceding variable speed rim plate realizes the two variable speed regulations in the many gears position of variable speed bicycle pedal position and rear wheel position under the effect of speed governing main shaft with back variable speed rim plate.

In the technical scheme, a plurality of front gear rings with different diameters are concentrically and convexly arranged on the inner side of the front speed changing wheel disc, and the axle center of each front gear ring is collinear with the axle center of the front speed changing wheel disc and the axle center of the pedal shaft;

a plurality of rear gear rings with different diameters are concentrically and convexly arranged on the outer side of the rear speed changing wheel disc, and the axis of each rear gear ring is collinear with the axis of the rear speed changing wheel disc and the axis of a rear wheel shaft;

the front speed-changing wheel disc is correspondingly meshed and connected with a pedal position pinion arranged at the front end of the speed-adjusting main shaft through a plurality of front gear rings with different diameters and lengths arranged on the inner side of the front speed-changing wheel disc so as to realize speed-changing adjustment of the pedal position of the speed-changing bicycle;

the rear speed-changing wheel disc is correspondingly meshed and connected with a rear wheel position pinion arranged at the rear end of the speed-adjusting main shaft through a plurality of rear gear rings with different diameters and lengths arranged on the outer side of the rear speed-changing wheel disc, so that the speed-changing adjustment of the rear wheel position of the speed-changing bicycle is realized.

Further in the above technical solution, the distance between every two adjacent front gear rings is 10 mm; the distance between every two adjacent rear gear rings is 5 mm.

Further, in the above technical scheme, the gear ring end face of one side of each front gear ring is fixedly attached to the inner side disc face of the front speed-changing wheel disc, and a plurality of semi-cylindrical front tooth grooves are annularly distributed on the gear ring end face of the other side;

the end face of the gear ring at one side of each rear gear ring is fixedly attached to the disc surface at the outer side of the rear speed changing wheel disc, a plurality of semi-cylindrical rear tooth sockets are annularly distributed on the end face of the gear ring at the other side of the rear speed changing wheel disc, and the disc surface at the inner side of the rear speed changing wheel disc is correspondingly attached to the left side surface of a hub of a rear wheel of the speed changing bicycle;

a plurality of pedal position pinion bearings which are correspondingly meshed with the semi-cylindrical front tooth grooves are uniformly distributed on the outer circumference of the pedal position pinion;

a plurality of rear wheel position pinion bearings which are correspondingly meshed with the semi-cylindrical rear tooth grooves are uniformly distributed on the outer circumference of the rear wheel position pinion;

the pedal position pinion is correspondingly meshed and connected with semi-cylindrical front tooth grooves arranged on front tooth rings with different diameters of the front speed changing wheel disc through a pedal position pinion bearing distributed on the outer circumference of the pedal position pinion so as to realize speed changing adjustment of the pedal position of the speed changing bicycle;

the rear wheel position pinion is correspondingly meshed and connected with semi-cylindrical rear tooth grooves arranged on rear gear rings with different diameters of a rear speed changing wheel disc through a rear wheel position pinion bearing distributed on the outer circumference of the rear wheel position pinion so as to realize speed changing adjustment of the rear wheel position of the speed changing bicycle.

Further in the above technical solution, a pedal position pinion forward position cut-in groove is further provided at an outer side of the front ring close to the center of the front speed changing wheel disc, a pedal position pinion backward position cut-in groove is further provided at an inner side of the front ring close to the edge of the front speed changing wheel disc, a pedal position pinion forward position cut-in groove is provided at an outer side of each of the front ring gears at the remaining portions of the front speed changing wheel disc, and a pedal position pinion backward position cut-in groove is provided at an inner side thereof;

a rear wheel position pinion forward position cut-in groove is further formed in the outer side of the rear gear ring close to the center of the rear speed changing wheel disc, a rear wheel position pinion backward position cut-in groove is further formed in the inner side of the rear gear ring close to the edge of the rear speed changing wheel disc, a rear wheel position pinion forward position cut-in groove is formed in the outer side of each rear gear ring of the rest of the rear speed changing wheel disc, and a rear wheel position pinion backward position cut-in groove is formed in the inner side of each rear gear ring;

the pedal position pinion forward position cut-in groove is used for facilitating the pedal position pinion to be advanced into the front gear ring of the inner layer from the front gear ring of the outer layer when the bicycle is subjected to speed change adjustment, and the pedal position pinion backward position cut-in groove is used for facilitating the pedal position pinion to be backward cut into the front gear ring of the outer layer from the front gear ring of the inner layer when the bicycle is subjected to speed change adjustment;

the rear wheel position pinion forward position cut-in groove is used for facilitating the rear wheel position pinion to be switched in the rear gear ring of the inner layer from the rear gear ring of the outer layer when the bicycle is subjected to speed change adjustment, and the rear wheel position pinion backward position cut-in groove is used for facilitating the rear wheel position pinion to be switched in the rear gear ring of the outer layer from the rear gear ring of the inner layer when the bicycle is subjected to speed change adjustment.

Further in the above technical solution, a right pedal crank is provided on the outer side of the front speed changing wheel disc, one end of the right pedal crank is attached to the outer disc surface of the front speed changing wheel disc and coaxially sleeved on the pedal shaft with the front speed changing wheel disc, and the other end is connected to a right pedal of the speed changing bicycle;

one end of the pedal shaft is connected with the front speed changing wheel disc and the right pedal crank in a rotating fit mode, the other end of the pedal shaft penetrates through a frame of the speed changing bicycle to be connected with the left pedal crank in a rotating fit mode, and the left pedal crank is connected with a left pedal of the speed changing bicycle.

Further in the above technical solution, as a preferred example of the present invention: the speed regulation main shaft comprises a main shaft, a main shaft sleeve A, a main shaft sleeve B, a main shaft sleeve C, a pedal position plane bearing, a pedal position pinion, a rear wheel position plane bearing A, a rear wheel position pinion, a rear wheel position plane bearing B, a pedal position spring, a rear wheel position spring, a pedal position pinion positioning pin, a rear wheel position pinion positioning pin, a pedal position steel wire rope and a rear wheel position steel wire rope;

the main shaft sequentially penetrates through the main shaft sleeve A, the pedal position plane bearing, the main shaft sleeve B, the main shaft sleeve C, the rear wheel position plane bearing A and the rear wheel position plane bearing B, one end of the main shaft is fixedly connected with a frame at the pedal position, and the other end of the main shaft is fixedly connected with the frame at the rear wheel position; one end of the pedal position plane bearing is fixedly connected with the spindle sleeve A, and the other end of the pedal position plane bearing is abutted with the pedal position pinion;

the pedal position pinion is assembled between the main shaft sleeve B and the pedal position plane bearing and fixedly sleeved on the end part of one end, close to the pedal position plane bearing, of the main shaft sleeve B;

one end, far away from the pedal position plane bearing, of the main shaft sleeve B is connected with one end of the main shaft sleeve C in a sliding fit mode, the other end of the main shaft sleeve C is fixedly connected with one end of the rear wheel position plane bearing A, the other end of the rear wheel position plane bearing A is abutted with the rear wheel position plane bearing B, the rear wheel position pinion is located between the rear wheel position plane bearing A and the rear wheel position plane bearing B and fixedly sleeved on the end, close to one end of the rear wheel position plane bearing B, of the rear wheel position plane bearing A;

the pedal position spring is sleeved on the spindle sleeve A, one end of the pedal position spring is abutted with the pedal position plane bearing, and the other end of the pedal position spring is abutted with the frame at the pedal position;

the rear wheel position spring is sleeved on the main shaft sleeve C, one end of the rear wheel position spring is abutted with the rear wheel position plane bearing A, and the other end of the rear wheel position spring is abutted with one end, away from the pedal position pinion, of the main shaft sleeve B;

the pedal position pinion positioning pin is arranged in the pedal position plane bearing;

the rear wheel position pinion positioning pin is arranged in the rear wheel position plane bearing B;

one end of the pedal position steel wire rope is connected with the pedal position pinion positioning pin, and the other end of the pedal position steel wire rope is connected with a pedal position speed changer arranged on a handlebar bracket of the speed-changing bicycle;

one end of the rear wheel position steel wire rope is connected with the rear wheel position pinion positioning pin, and the other end of the rear wheel position steel wire rope is connected with a rear wheel position speed changer arranged on a handlebar bracket of the speed-changing bicycle;

the pedal position speed changer and the rear wheel position speed changer are symmetrically arranged at two ends of the handlebar support close to the left handlebar and the right handlebar of the speed-changing bicycle.

Further, in the first preferred embodiment, a pedal position long hole is formed at one end of the main shaft close to the pedal shaft, and the pedal position long hole is in sliding fit with the pedal position pinion positioning pin;

a rear wheel position long hole is formed in one end, close to a rear wheel shaft, of the main shaft and is in sliding fit with the rear wheel position pinion positioning pin;

a rear axle hole is further formed in one end, close to the rear axle, of the main shaft, and the main shaft is connected with the rear axle in a rotating fit mode through the rear axle hole;

the outer wall of the spindle sleeve C is also provided with a sliding key groove, the inner wall of the spindle sleeve B is also provided with a sliding rail matched with the sliding key groove in a sliding manner, and the spindle sleeve B is matched with the sliding key groove arranged on the outer wall of the spindle sleeve C in a sliding manner through the sliding rail arranged on the inner wall of the spindle sleeve B.

Further in the above technical solution, as another preferred example of the present invention: the speed regulation main shaft comprises a transmission main shaft, a pedal position outer bearing, a rear wheel position outer bearing, a pedal position inner bearing, a rear wheel position inner bearing, a pedal position screw rod, a rear wheel position adjusting rod, a pedal position pinion, a rear wheel position pinion, a pedal position screw nut, a rear wheel position screw nut, a pedal position screw nut positioning pin, a rear wheel position screw nut positioning pin, a pedal position micro reducer, a rear wheel position micro reducer, a pedal position micro stepping motor, a rear wheel position micro stepping motor, a pedal position lithium battery, a rear wheel position lithium battery, a pedal position micro stepping motor wireless driver and a rear wheel position micro stepping motor wireless driver;

the pedal position outer bearing and the rear wheel position outer bearing are respectively arranged at two ends of the transmission main shaft and are respectively fixed on bearing seats arranged on a frame at the pedal position and the rear wheel position of the variable speed bicycle;

the pedal position inner bearing, the pedal position lead screw nut, the pedal position miniature speed reducer, the pedal position miniature stepping motor, the pedal position lithium battery and the pedal position miniature stepping motor wireless driver are all arranged in the first strip-shaped groove of the transmission main shaft; the rear wheel position inner bearing, the rear wheel position screw rod nut, the rear wheel position micro speed reducer, the rear wheel position micro stepping motor, the rear wheel position lithium battery and the rear wheel position micro stepping motor wireless driver are all arranged in a second strip-shaped groove of the transmission main shaft;

one end of the pedal position lead screw is connected with the pedal position inner bearing, the other end of the pedal position lead screw penetrates through a pedal position lead screw nut and is connected with the pedal position micro reducer, the pedal position inner bearing is correspondingly positioned inside the pedal position outer bearing, the pedal position micro reducer is correspondingly connected with the pedal position micro stepping motor, the pedal position micro stepping motor is correspondingly and electrically connected with the pedal position micro stepping motor wireless driver, and the pedal position micro stepping motor wireless driver is correspondingly and electrically connected with the pedal position lithium battery;

one end of the rear wheel position screw rod is connected with the rear wheel position inner bearing, the other end of the rear wheel position screw rod is connected with the rear wheel position micro reducer after penetrating through a rear wheel position screw rod nut, the rear wheel position inner bearing is correspondingly positioned in the rear wheel position outer bearing, the rear wheel position micro reducer is correspondingly connected with the rear wheel position micro stepping motor, the rear wheel position micro stepping motor is correspondingly and electrically connected with the rear wheel position micro stepping motor wireless driver, and the rear wheel position micro stepping motor wireless driver is correspondingly and electrically connected with the rear wheel position lithium battery;

the pedal position small gear and the rear wheel position small gear are sleeved on the transmission main shaft, the pedal position small gear is fixedly connected with the pedal position screw nut through a pedal position screw nut positioning pin, the rear wheel position small gear is fixedly connected with the rear wheel position screw nut through a rear wheel position screw nut positioning pin, the pedal position screw nut is in threaded fit with the pedal position screw nut, and the rear wheel position screw nut is in threaded fit with the rear wheel position screw nut;

the pedal position micro stepping motor wireless driver and the rear wheel position micro stepping motor wireless driver are also correspondingly in wireless communication connection with a stepping motor remote control speed regulator arranged on a handlebar bracket of the variable speed bicycle; the stepping motor remote control speed regulator is also correspondingly and electrically connected with the pedal position lithium battery or the rear wheel position lithium battery.

Further in the second preferred embodiment, the transmission spindle is further provided with a plurality of pedal position lead screw nut positioning pin chutes and a plurality of rear wheel position lead screw nut positioning pin chutes, each pedal position lead screw nut positioning pin chute is correspondingly matched with one pedal position lead screw nut positioning pin in a sliding manner, and each rear wheel position lead screw nut positioning pin chute is correspondingly matched with one rear wheel position lead screw nut positioning pin in a sliding manner.

Compared with the prior art, the utility model has the advantages that:

(1) compared with the traditional bicycle, the bicycle is more labor-saving in riding and good in user experience; this is because the transmission fluted disc of its pedal position of traditional bicycle is connected through the chain drive, and the utility model provides a transmission fluted disc of its pedal position of bicycle is connected through the transmission of speed governing main shaft, and both ride the stress point difference, the utility model provides a transmission fluted disc of its pedal position of bicycle has more a radial distance than the transmission fluted disc of its pedal position of traditional bicycle, and this more a radial distance is just like having increased a radius power pole for riding more laborsavingly;

(2) the service life is longer, the riding inconvenience caused by the fault that the chain frequently falls off is reduced, and the performance is better than the investment of maintenance cost;

(3) the transmission efficiency is high, the speed change pinion is made of a small bearing, the resistance is very small, the speed change pinion is smoother, and the pedaling force applied by a rider is almost completely and directly converted into the advancing power of the bicycle;

(4) the structure is simple, and the multi-gear double-speed change adjustment of the pedal position and the rear wheel position can be realized simultaneously.

Drawings

FIG. 1 is a schematic view of an embodiment of the chainless dual speed bicycle of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a perspective view of the front derailleur disk of FIG. 1;

FIG. 5 is a front elevational view of the front shift disk of FIG. 4;

FIG. 6 is a perspective view of the rear derailleur disk of FIG. 1;

FIG. 7 is a front elevational view of the rear derailleur disk of FIG. 6;

FIG. 8 shows an embodiment of the adjustable speed spindle of FIG. 1

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a schematic cross-sectional view A-A of FIG. 9;

FIG. 11 is a partial structural view of the speed regulating spindle of FIG. 8;

FIG. 12 is another embodiment of the adjustable speed spindle of FIG. 1;

FIG. 13 is a front view of FIG. 12;

description of reference numerals: 1. a front shift sheave; 1.1, a front gear ring; 1.1a, a front tooth groove;

2. a rear variable speed wheel disc; 2.1, a rear gear ring; 2.1a, a rear tooth space; 3. a speed-regulating main shaft; 4. a pedal shaft; 5. a rear wheel axle; 6. a handlebar support; 7. a pedal position transmission; 8. a rear wheel position transmission; 9. a left handlebar; 10. a right handlebar; 11. a right pedal crank; 12. a left pedal crank; 13. a right foot pedal; 14. A left foot pedal; 15. a frame;

3.1, a main shaft; 3.1a, the pedal bit is long and long; 3.1b, long holes at the rear wheel positions; 3.1c, rear axle hole; 3.2, a main shaft sleeve A; 3.3, a main shaft sleeve B; 3.3a, a slide rail; 3.4, a main shaft sleeve C; 3.4a, a sliding key groove; 3.5, a pedal position plane bearing; 3.6, a pedal position pinion; 3.6a, a pedal position small tooth bearing; 3.7 rear wheel position plane bearing A; 3.8, a rear wheel position pinion; 3.8a, a rear wheel position small tooth bearing; 3.9 rear wheel position plane bearing B; 3.10, a pedal position spring; 3.11, a rear wheel position spring; 3.12, pedal position pinion positioning pins; 3.13, rear wheel position pinion positioning pins; 3.14, a pedal position steel wire rope; 3.15, rear wheel position steel wire ropes;

3.1', a transmission main shaft; 3.1 a' and a first strip-shaped groove; 3.1 b' and a second strip-shaped groove; 3.1 c', a pedal position screw nut positioning pin chute; 3.1 d', a rear wheel position screw nut positioning pin sliding groove; 3.2', pedal position outer bearing; 3.3', a rear wheel position outer bearing; 3.4', pedal position inner bearing; 3.5', a rear wheel position inner bearing; 3.6, a pedal position screw rod; 3.7', a rear wheel position screw rod; 3.8', pedal position screw rod nuts; 3.9', a rear wheel position screw nut; 3.10', a pedal position screw rod nut positioning pin; 3.11', a rear wheel position screw nut positioning pin; 3.12', a pedal position miniature speed reducer; 3.13', a rear wheel position miniature speed reducer; 3.14', a pedal position micro stepping motor; 3.15', a rear wheel position micro stepping motor; 3.16', pedal lithium battery; 3.17', rear wheel position lithium battery; 3.18', a pedal position micro stepping motor wireless driver; 3.19' and a rear wheel position micro stepping motor wireless driver.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, how to implement the present invention is further explained below with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, the utility model provides a pair of novel two variable speed bicycles of no chain formula, contain preceding variable speed rim plate 1, back variable speed rim plate 2 and speed governing main shaft 3, wherein, 1 cover of preceding variable speed rim plate is established on variable speed bicycle's pedal axle 4, 2 covers of back variable speed rim plate are established on variable speed bicycle's rear axle 5, speed governing main shaft 3 sets up in the front between variable speed rim plate 1 and back variable speed rim plate 2, and 3 one end of speed governing main shaft are meshed with preceding variable speed rim plate 1 and are connected, the other end is meshed with back variable speed rim plate 2 and is connected, preceding variable speed rim plate 1 and back variable speed rim plate 2 are under speed governing main shaft 3's effect, realize the two variable speed regulations in the many grades of variable speed bicycle pedal position and back wheel.

Referring to fig. 2, 4 and 5, in the present invention, a plurality of front gear rings 1.1 with different diameters are concentrically and convexly disposed on the inner side of the front transmission wheel disc 1, and the axis of each front gear ring 1.1 is collinear with the axis of the front transmission wheel disc 1 and the axis of the pedal shaft 4;

referring to fig. 3, 6 and 7, a plurality of rear gear rings 2.1 with different diameters are concentrically and convexly arranged on the outer side of the rear transmission wheel disc 2, and the axis of each rear gear ring 2.1 is collinear with the axis of the rear transmission wheel disc 2 and the axis of the rear wheel shaft 5;

referring to fig. 1 to 3, in the present invention, a front shifting wheel disc 1 is correspondingly engaged with a pedal position pinion 3.6 provided at the front end of a speed-adjusting main shaft 3 through a plurality of front gear rings 1.1 provided at the inner side thereof and having different diameters, so as to adjust the shifting of the pedal position of the variable-speed bicycle; the rear speed-changing wheel disc 2 is correspondingly meshed and connected with a rear wheel position pinion 3.8 arranged at the rear end of the speed-adjusting main shaft 3 through a plurality of rear gear rings 2.1 with different diameters and lengths arranged on the outer side of the rear speed-changing wheel disc, so that the speed-changing adjustment of the rear wheel position of the speed-changing bicycle is realized.

In the utility model, the distance between 1.1 of every two adjacent front gear rings is 10 mm; the distance between every two adjacent rear gear rings 2.1 is 5 mm.

Referring to fig. 4, in the present invention, each front gear ring 1, the gear ring end surface of one side is fixed to the inner side disk surface of the front transmission wheel 1, and a plurality of semi-cylindrical front tooth sockets 1.1a are annularly arranged on the gear ring end surface of the other side;

referring to fig. 6, in the present invention, the gear ring end surface of one side of each rear gear ring 2.1 is fixed to the outer side disc surface of the rear transmission wheel disc 2, a plurality of semi-cylindrical rear tooth grooves 2.1a are annularly arranged on the gear ring end surface of the other side, and the inner side disc surface of the rear transmission wheel disc 2 is correspondingly attached to the left side surface of the rear wheel hub of the speed-changing bicycle;

referring to fig. 9, in the present invention, a plurality of pedal position pinion bearings 3.6a correspondingly engaged with the semi-cylindrical front tooth socket 1.1a are uniformly arranged on the outer circumference of the pedal position pinion 3.6; referring to fig. 9, in the present invention, a plurality of rear wheel position pinion bearings 3.8a correspondingly engaged with the semi-cylindrical rear tooth space 2.1a are uniformly arranged on the outer circumference of the rear wheel position pinion 3.8;

in operation, referring to fig. 1, the pedal position pinion 3.6 is correspondingly engaged with the semi-cylindrical front tooth socket 1.1a arranged on each front gear ring 1.1 with different diameters of the front speed changing wheel disc 1 through the pedal position pinion bearing 3.6a arranged on the outer circumference of the pedal position pinion to realize the speed changing adjustment of the pedal position of the speed changing bicycle; the rear wheel position pinion 3.8 is correspondingly meshed and connected with a semi-cylindrical rear tooth socket 2.1a arranged on each rear gear ring 2.1 with different diameters of the rear speed changing wheel disc 2 through a rear wheel position pinion bearing 3.8a distributed on the outer circumference of the rear wheel position pinion so as to realize the speed changing adjustment of the rear wheel position of the speed changing bicycle;

the utility model discloses in, make the gear shape with the bearing and can make the bicycle move more in the same direction as smooth, and the non-resistance, transmission efficiency is very high.

Referring to fig. 5, a pedal position pinion forward carrying cut-in groove 1.1b is further formed in the outer side of a front gear ring 1.1 close to the center of a front transmission wheel disc 1, a pedal position pinion backward carrying cut-in groove 1.1c is further formed in the inner side of the front gear ring 1.1 close to the edge of the front transmission wheel disc 1, a pedal position pinion forward carrying cut-in groove 1.1b is formed in the outer side of each front gear ring 1.1 in the rest of the front transmission wheel disc 1, and a pedal position pinion backward carrying cut-in groove 1.1c is formed in the inner side of each front gear ring 1.1; arc chamfers are arranged on the peripheries of the forward cut-in groove 1.1b and the backward cut-in groove 1.1c of the pedal position pinion, so that the cut-in and the cut-out of the pedal position pinion 3.6 are smoother;

referring to fig. 7, a rear wheel position pinion forward position cut groove 2.1b is further formed in the outer side of the rear gear ring 2.1 near the center of the rear transmission wheel disc 2, a rear wheel position pinion backward position cut groove 2.1c is further formed in the inner side of the rear gear ring 2.1 near the edge of the rear transmission wheel disc 2, a rear wheel position pinion forward position cut groove 2.1b is formed in the outer side of each rear gear ring 2.1 at the rest of the rear transmission wheel disc 2, and a rear wheel position pinion backward position cut groove 2.1c is formed in the inner side of each rear gear ring 2.1; arc chamfers are arranged on the peripheries of the front carrying cut-in groove 2.1b of the rear wheel position pinion and the rear withdrawing cut-in groove 2.1c of the rear wheel position pinion, so that the rear wheel position pinion 3.8 can be cut in and out smoothly;

in the utility model, the forward cutting groove 1.1b of the pedal position pinion is used for facilitating the forward cutting of the pedal position pinion 3.6 from the front gear ring 1.1 of the outer layer into the front gear ring 1.1 of the inner layer when the bicycle is adjusted in speed change, and the backward cutting groove 1.1c of the pedal position pinion is used for facilitating the backward cutting of the pedal position pinion 3.6 from the front gear ring 1.1 of the inner layer into the front gear ring 1.1 of the outer layer when the bicycle is adjusted in speed change;

the rear wheel position pinion forward position cut-in groove 2.1b is used for facilitating the rear wheel position pinion 3.8 to be forwardly cut into the rear gear ring 2.1 of the inner layer from the rear gear ring 2.1 of the outer layer when the bicycle is subjected to speed change adjustment, and the rear wheel position pinion backward position cut-in groove 2.1c is used for facilitating the rear wheel position pinion 3.8 to be backwardly cut into the rear gear ring 2.1 of the outer layer from the rear gear ring 2.1 of the inner layer when the bicycle is subjected to speed change adjustment.

Referring to fig. 1, in the present invention, a right pedal crank 11 is disposed at the outer side of the front transmission wheel disc 1, one end of the right pedal crank 11 is attached to the outer disc surface of the front transmission wheel disc 1 and coaxially sleeved on the pedal shaft 4 with the front transmission wheel disc 1, and the other end is connected to a right pedal 13 of the variable speed bicycle; one end of the pedal shaft 4 is connected with the front speed-changing wheel disc 1 and the right pedal crank 11 in a rotating fit manner, the other end of the pedal shaft passes through the frame 15 of the speed-changing bicycle to be connected with the left pedal crank 12 in a rotating fit manner, and the left pedal crank 12 is connected with the left pedal 14 of the speed-changing bicycle.

Referring to fig. 8 to 11, as a preferred embodiment of the present invention:

the speed regulation main shaft 3 comprises a main shaft 3.1, a main shaft sleeve A3.2, a main shaft sleeve B3.3, a main shaft sleeve C3.4, a pedal position plane bearing 3.5, a pedal position pinion 3.6, a rear wheel position plane bearing A3.7, a rear wheel position pinion 3.8, a rear wheel position plane bearing B3.9, a pedal position spring 3.10, a rear wheel position spring 3.11, a pedal position pinion positioning pin 3.12, a rear wheel position pinion positioning pin 3.13, a pedal position steel wire rope 3.14 and a rear wheel position steel wire rope 3.15; a main shaft 3.1 sequentially penetrates through a main shaft sleeve A3.2, a pedal position plane bearing 3.5, a main shaft sleeve B3.3, a main shaft sleeve C3.4, a rear wheel position plane bearing A3.7 and a rear wheel position plane bearing B3.9, one end of the main shaft 3.1 is fixedly connected with a frame at the pedal position, and the other end of the main shaft is fixedly connected with the frame at the rear wheel position; one end of a pedal position plane bearing 3.5 is fixedly connected with the main shaft sleeve A3.2, and the other end of the pedal position plane bearing is abutted with a pedal position pinion 3.6; the pedal position pinion 3.6 is assembled between the main shaft sleeve B3.3 and the pedal position plane bearing 3.5 and fixedly sleeved on the end part of one end of the main shaft sleeve B3.3 close to the pedal position plane bearing 3.5; one end of the main shaft sleeve B3.3, which is far away from the pedal position plane bearing 3.5, is connected with one end of the main shaft sleeve C3.4 in a sliding fit manner, the other end of the main shaft sleeve C3.4 is fixedly connected with one end of the rear wheel position plane bearing A3.7, the other end of the rear wheel position plane bearing A3.7 is abutted with the rear wheel position plane bearing B3.9, and the rear wheel position pinion 3.8 is positioned between the rear wheel position plane bearing A3.7 and the rear wheel position plane bearing B3.9 and fixedly sleeved on the end part of one end, which is close to the rear wheel position plane bearing B3.9, of the rear wheel position plane bearing A3.7; a pedal position spring 3.10 is sleeved on the spindle sleeve A3.2, one end of the pedal position spring 3.10 is abutted with the pedal position plane bearing 3.5, and the other end is abutted with a frame at a pedal position; the rear wheel position spring 3.11 is sleeved on the main shaft sleeve C3.4, one end of the rear wheel position spring 3.11 is abutted with the rear wheel position plane bearing A3.7, and the other end is abutted with one end of the main shaft sleeve B3.3 far away from the pedal position pinion 3.6; a pedal position pinion positioning pin 3.12 is arranged in a pedal position plane bearing 3.5; the rear wheel position pinion positioning pin 3.13 is arranged in a rear wheel position plane bearing B3.9; one end of the pedal position steel wire rope 3.14 is connected with the pedal position plane bearing 3.5, and the other end is connected with a pedal position speed changer 7 arranged on a handlebar bracket 6 of the speed-changing bicycle; one end of a rear wheel position steel wire rope 3.15 is connected with a rear wheel position plane bearing B3.9, and the other end is connected with a rear wheel position speed changer 8 arranged on a handlebar bracket 6 of the speed-changing bicycle; the pedal position speed changer 7 and the rear wheel position speed changer 8 are symmetrically arranged at two ends of the handlebar support 6 close to the left and right handlebars 9 and 10 of the speed-changing bicycle.

In the preferred embodiment, one end of the main shaft 3.1 close to the pedal shaft 4 is provided with a pedal bit long hole 3.1a, and the pedal bit long hole 3.1b is in sliding fit with a pedal bit pinion positioning pin 3.12; a rear wheel position long strip hole 3.1b is arranged at one end of the main shaft 3.1 close to the rear wheel shaft 5, and the rear wheel position long strip hole 3.1b is in sliding fit with a rear wheel position pinion positioning pin 3.13; a rear axle hole 3.1c is also arranged at one end of the main axle 3.1 close to the rear axle 5, and the main axle 3.1 is connected with the rear axle 5 in a rotating fit way through the rear axle hole 3.1 c; the outer wall of the main shaft sleeve C3.4 is also provided with a sliding key groove 3.4a, the inner wall of the main shaft sleeve B3.3 is also provided with a sliding rail 3.3a matched with the sliding key groove 3.4a in a sliding way, and the main shaft sleeve B3.3 is matched with the sliding key groove 3.4a arranged on the outer wall of the main shaft sleeve C3.4 in a sliding way through the sliding rail 3.3a arranged on the inner wall of the main shaft sleeve B3.3.

In the preferred embodiment, the pedal position pinion positioning pin 3.12 and the pedal position spring 3.10 are used together for limiting the forward or backward displacement of the pedal position pinion 3.6; the rear wheel position pinion positioning pin 3.13 and the rear wheel position spring 3.11 are used for limiting the forward or backward displacement of the rear wheel position pinion 3.8; the pedal position spring 3.10 and the rear wheel position spring 3.11 are both in a compressed state in the using process;

when the pedal position plane bearing 3.5 is pulled by the pedal position steel wire rope 3.14 to advance to a gear position along the pedal position long strip hole 3.1a in the direction of the pedal shaft, the pedal position pinion 3.6 can also push the pedal position spring 3.10, the spindle sleeve A3.2 and the pedal position plane bearing 3.5 to advance to a gear position in the direction of the pedal shaft 4, and the pedal position pinion 3.6 is cut into the front gear ring 1.1 of the inner layer from the outer layer front gear ring 1.1 where the pedal position pinion is located currently; similarly, when a gear is released through the pedal position steel wire rope 3.14, the pedal position plane bearing 3.5 and the pedal position pinion 3.6 move backwards by a distance of one gear along the pedal position long hole 3.1a on the main shaft 3.1 under the elastic force of the pedal position spring 3.10, and the pedal position pinion 3.6 is cut into the front gear ring 1.1 of the outer layer from the currently positioned front gear ring 1.1 of the inner layer;

when the rear wheel position flat bearing B3.9 is pulled by the rear wheel position steel wire rope 3.15 to advance to a gear position along the rear wheel position strip hole 3.1B to the pedal shaft direction, the rear wheel position pinion 3.8 also pushes the rear wheel position flat bearing A3.7, the rear wheel position spring 3.11 and the main shaft sleeve C3.4 to advance to a gear position towards the pedal shaft 4 direction, and the rear wheel position pinion 3.8 is cut into the rear gear ring 2.1 of the outer layer from the rear gear ring 2.1 of the inner layer where the rear wheel position pinion is located at present; similarly, when a gear is released through the rear wheel position steel wire rope 3.15, the rear wheel position pinion 3.8, the rear wheel position plane bearing A3.7 and the rear wheel position plane bearing B3.9 retreat by a distance of one gear along the rear wheel position elongated hole 3.1B on the main shaft 3.1 under the elastic force of the rear wheel position spring 3.11, and the rear wheel position pinion 3.8 is cut into the rear gear ring 2.1 of the inner layer from the outer layer rear gear ring 2.1 where the rear wheel position pinion is currently located;

in a preferred embodiment, the main shaft 3.1 is fixed, and the main shaft sleeve A3.2, the pedal position spring 3.10, the pedal position plane bearing 3.5 and the rear wheel position plane bearing B3.9 all slide along the main shaft 3.1 but do not rotate; the pedal position pinion 3.6, the spindle sleeve B3.3, the spindle sleeve C3.4, the rear wheel position spring 3.11, the rear wheel position flat bearing a3.7 and the rear wheel position pinion 3.8 slide along the spindle 3.1 and also rotate along the spindle 3.1.

Referring to fig. 12 and 13, as another preferred embodiment of the present invention:

the speed regulation main shaft 3 comprises a transmission main shaft 3.1 ', a pedal position outer bearing 3.2 ', a rear wheel position outer bearing 3.3 ', a pedal position inner bearing 3.4 ', a rear wheel position inner bearing 3.5 ', a pedal position lead screw 3.6 ', a rear wheel position adjusting screw rod 3.7 ', a pedal position pinion 3.6, a rear wheel position pinion 3.8, a pedal position lead screw nut 3.8 ', a rear wheel position lead screw nut 3.9 ', a pedal position lead screw nut positioning pin 3.10 ', a rear wheel position lead screw nut positioning pin 3.11 ', a pedal position micro reducer 3.12 ', a rear wheel position micro reducer 3.13 ', a pedal position micro stepper motor 3.14 ', a rear wheel position micro stepper motor 3.15 ', a pedal position lithium battery 3.16 ', a rear wheel position lithium battery 3.17 ', a pedal position micro stepper motor wireless driver 3.18 ' and a rear wheel position micro stepper motor wireless driver 3.19 '; wherein, the pedal position outer bearing 3.2 ' and the rear wheel position outer bearing 3.3 ' are respectively arranged at two ends of the transmission main shaft 3.1 ' and are respectively fixed on bearing seats (not shown in the figure) arranged at the pedal position and the rear wheel position of the speed-changing bicycle on the frame; a first strip-shaped groove 3.1a 'and a second strip-shaped groove 3.1 b' are further arranged on the transmission main shaft 3.1 ', a pedal position inner bearing 3.4', a pedal position screw rod 3.6 ', a pedal position screw rod nut 3.8', a pedal position micro reducer 3.12 ', a pedal position micro stepping motor 3.14', a pedal position lithium battery 3.16 'and a pedal position micro stepping motor wireless driver 3.18' are all arranged in the first strip-shaped groove 3.1a 'of the transmission main shaft 3.1'; a rear wheel position inner bearing 3.5 ', a rear wheel position screw rod 3.7 ', a rear wheel position screw rod nut 3.9 ', a rear wheel position micro reducer 3.13 ', a rear wheel position micro stepping motor 3.15 ', a rear wheel position lithium battery 3.17 ' and a rear wheel position micro stepping motor wireless driver 3.19 ' are all arranged in a second strip-shaped groove 3.1b ' of the transmission main shaft 3.1 '; one end of a pedal position screw rod 3.6 'is connected with a pedal position inner bearing 3.4', the other end of the pedal position screw rod passes through a pedal position screw rod nut 3.8 'and is connected with a pedal position micro reducer 3.12', the pedal position inner bearing 3.4 'is also correspondingly positioned inside a pedal position outer bearing 3.2', the pedal position micro reducer 3.12 'is also correspondingly connected with a pedal position micro stepping motor 3.14', the pedal position micro stepping motor 3.14 'is also correspondingly electrically connected with a pedal position micro stepping motor wireless driver 3.18', and the pedal position micro stepping motor wireless driver 3.18 'is also correspondingly electrically connected with a pedal position lithium battery 3.16'; one end of a rear wheel position screw rod 3.7 'is connected with a rear wheel position inner bearing 3.5', the other end of the rear wheel position screw rod is connected with a rear wheel position micro reducer 3.13 'by penetrating through a rear wheel position screw rod nut 3.9', the rear wheel position inner bearing 3.5 'is correspondingly positioned in a rear wheel position outer bearing 3.3', the rear wheel position micro reducer 3.13 'is correspondingly connected with a rear wheel position micro stepping motor 3.15', the rear wheel position micro stepping motor 3.15 'is correspondingly electrically connected with a rear wheel position micro stepping motor wireless driver 3.19', and the rear wheel position micro stepping motor wireless driver 3.19 'is correspondingly electrically connected with a rear wheel position lithium battery 3.17'; the pedal position pinion 3.6 and the rear wheel position pinion 3.8 are sleeved on the transmission main shaft 3.1 ', the pedal position pinion 3.6 is fixedly connected with a pedal position screw nut 3.8 ' through a pedal position screw nut positioning pin 3.10 ', the rear wheel position pinion 3.8 is fixedly connected with a rear wheel position screw nut 3.9 ' through a rear wheel position screw nut positioning pin 3.11 ', the pedal position screw nut 3.8 ' is in threaded fit with the pedal position screw nut 3.6 ', and the rear wheel position screw nut 3.9 ' is in threaded fit with the rear wheel position screw nut 3.7 '; the pedal position micro stepping motor wireless driver 3.18 'and the rear wheel position micro stepping motor wireless driver 3.19' are also correspondingly in wireless communication connection with a stepping motor remote control speed regulator (not shown in the figure) arranged on a handlebar support 6 of the speed-changing bicycle; the stepping motor remote control speed regulator is also correspondingly and electrically connected with a pedal position lithium battery 3.16 'or a rear wheel position lithium battery 3.17'.

In the preferred embodiment: a plurality of pedal position screw nut positioning pin chutes 3.1c ' and a plurality of rear wheel position screw nut positioning pin chutes 3.1d ' are further formed in the transmission main shaft 3.1 ', each pedal position screw nut positioning pin chute 3.1c ' is correspondingly matched with one pedal position screw nut positioning pin 3.10 ' in a sliding manner, and each rear wheel position screw nut positioning pin chute 3.1d ' is correspondingly matched with one rear wheel position screw nut positioning pin 3.11 ' in a sliding manner.

In the preferred embodiment, according to the setting requirement, a pedal position lithium battery charging hole (not shown in the figure) matched with the pedal position lithium battery 3.16 ' and a rear wheel position lithium battery charging hole matched with the rear wheel position lithium battery 3.17 ' can be formed in the transmission main shaft 3.1 '.

In the preferred embodiment, the speed regulating main shaft 3 integrally rotates, and the pedal position pinion 3.6 and the rear wheel position pinion 3.8 in the speed regulating main shaft 3 also slide along the transmission main shaft 3.1'.

Additionally stated, the utility model provides a novel two variable speed bicycles of no chain formula still contain the supporting spare part that conventional variable speed bicycles such as front wheel, rear wheel, saddle, front wheel brake equipment and rear wheel brake equipment contained, these supporting spare parts are in the utility model discloses in compare in conventional variable speed bicycle no improvement point, to the technical personnel in the field these supporting spare parts all be conventional knowledge, so the utility model discloses do not do specifically describe, secondly, the utility model discloses in related footboard position derailleur 7 and rear wheel position derailleur 8 are the finger dial adjustment derailleur that conventional mountain bike used in the market, step motor remote control speed regulator also is the conventional product in the market, and they all can select required model and gear requirement according to the design needs, this is in the utility model discloses do not do also do not specifically describe.

According to actual design needs, when the speed regulation main shaft adopts the first embodiment (namely manual control bicycle speed change), the working principle of the novel chainless double-speed change bicycle is as follows:

when a rider steps on a pedal, the pedal shaft 5 drives the front speed-changing wheel disc 1 to rotate, the rotation of the front speed-changing wheel disc 1 drives a pedal position pinion 3.6 on a speed-adjusting main shaft 3 which is in contact with the pedal position pinion 3.6 to rotate, the rotation of the pedal position pinion 3.6 provides rotation power for a main shaft sleeve B3.3 and a main shaft sleeve C3.4 on the speed-adjusting main shaft 3 to drive a rear wheel position pinion 3.8 at the tail part of the main shaft sleeve C3.4 to rotate, the rotation of the rear wheel position pinion 3.8 drives a rear speed-changing wheel disc 2 which is in contact with the rear wheel position pinion to rotate, and the rear speed-changing wheel disc 2 is fixed on a rear wheel shaft 5, so that when the rear speed-changing wheel disc 2 rotates, the;

when the speed is required to be changed, the positions of the two pinions (namely the pedal position pinion 3.6 and the rear wheel position pinion 3.8) can be adjusted by only manually rotating the speed changing handles (namely the pedal position speed changer 7 and the rear wheel position speed changer 8) to adjust the steel wire ropes (namely the pedal position steel wire rope 3.14 and the rear wheel position steel wire rope 3.15) on the speed adjusting main shaft 3 connected with the speed changing handles, namely the meshing action points of the two pinions and the corresponding speed changing wheel discs (namely the front speed changing wheel disc 1 and the rear speed changing wheel disc 2) are changed, and therefore double speed changing adjustment of the front speed changing wheel disc and the rear speed changing wheel disc of the bicycle is achieved.

Of course, during riding, single-speed-change adjustment can be selectively performed according to actual needs, namely, only one of the speed-change handles (namely, the pedal position transmission 7 or the rear wheel position transmission 8) is rotated to change the meshing position of the pinion (namely, the pedal position pinion 3.6 or the rear wheel position pinion 3.8) connected with the speed-change handle and the corresponding speed-change wheel disc (namely, the front speed-change wheel disc 1 or the rear speed-change wheel disc 2), so that the single-speed-change adjustment is realized.

(II) according to actual design needs, when adopting the speed governing main shaft to adopt above-mentioned second kind of embodiment (be automatic control bicycle variable speed promptly), this novel chainless formula double variable speed bicycle's theory of operation is as follows:

when a rider steps on a pedal, the pedal shaft 5 drives the front speed-changing wheel disc 1 to rotate, the rotation of the front speed-changing wheel disc 1 drives the pedal position pinion 3.6 on the speed-adjusting main shaft 3 which is in contact with the pedal position pinion 3.6 to rotate, the rotation of the pedal position pinion 3.6 provides rotation power for the transmission main shaft 3.1 'on the speed-adjusting main shaft 3, and then drives the rear wheel position pinion 3.8 at the tail part of the transmission main shaft 3.1' to rotate, the rotation of the rear wheel position pinion 3.8 can drive the rear speed-changing wheel disc 2 which is in contact with the rear wheel disc to rotate, and the rear speed-changing wheel disc 2 is fixed on the rear wheel shaft 5, so that the rear wheel can be driven to rotate when the rear speed-changing;

when the speed needs to be changed, the positions of two pinions (namely the pedal position pinion 3.6 and the rear wheel position pinion 3.8) are adjusted and changed by changing the positive and negative rotation of two miniature stepping motors (namely the pedal position miniature stepping motor 3.10 'and the rear wheel position miniature stepping motor 3.11') by manually starting corresponding speed change button keys of a stepping motor remote control speed regulator (not shown in the figure) arranged on a handlebar bracket 6 of the speed-changing bicycle, namely the meshing action points of the two pinions and the corresponding speed-changing wheel discs (namely the front speed-changing wheel disc 1 and the rear speed-changing wheel disc 2) are changed, so that the front and rear double speed-changing adjustment of the bicycle is realized;

similarly, in this embodiment, single-speed adjustment can be selectively performed according to actual needs, that is, forward and reverse rotation of only one of the micro stepping motors is adjusted to change the forward or backward position of the corresponding pinion on the transmission main shaft 3.1' to realize single-speed adjustment.

Finally, the above description is only the embodiments of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A novel chainless double-speed bicycle is characterized in that: contain preceding variable speed rim plate (1), back variable speed rim plate (2) and speed governing main shaft (3), preceding variable speed rim plate (1) cover is established on variable speed bicycle's pedal axle (4), back variable speed rim plate (2) cover is established on variable speed bicycle's rear axle (5), speed governing main shaft (3) set up between preceding variable speed rim plate (1) and back variable speed rim plate (2), and speed governing main shaft (3) one end with preceding variable speed rim plate (1) mesh is connected, the other end with back variable speed rim plate (2) mesh is connected, preceding variable speed rim plate (1) and back variable speed rim plate (2) realize the two variable speed regulations of the multiple gear position to variable speed bicycle pedal position and rear wheel position under the effect of speed governing main shaft (3).

2. The novel chainless dual speed bicycle of claim 1, wherein: a plurality of front gear rings (1.1) with different diameters are concentrically and convexly arranged on the inner side of the front speed changing wheel disc (1), and the axis of each front gear ring (1.1) is collinear with the axis of the front speed changing wheel disc (1) and the axis of the pedal shaft (4);

a plurality of rear gear rings (2.1) with different diameters are concentrically and convexly arranged on the outer side of the rear speed changing wheel disc (2), and the axis of each rear gear ring (2.1) is collinear with the axis of the rear speed changing wheel disc (2) and the axis of a rear wheel shaft (5);

the front speed-changing wheel disc (1) is correspondingly meshed and connected with a pedal position pinion (3.5) arranged at the front end of the speed-adjusting main shaft (3) through a plurality of front gear rings (1.1) with different diameters and lengths arranged on the inner side of the front speed-changing wheel disc so as to realize speed-changing adjustment of the pedal position of the speed-changing bicycle;

the rear speed changing wheel disc (2) is correspondingly meshed and connected with a rear wheel position pinion (3.6) arranged at the rear end of the speed adjusting main shaft (3) through a plurality of rear gear rings (2.1) with different diameters and lengths arranged on the outer side of the rear speed changing wheel disc to realize speed changing adjustment of the rear wheel position of the speed changing bicycle.

3. The novel chainless dual speed bicycle of claim 2, wherein: the distance between every two adjacent front gear rings (1.1) is 10 mm; the distance between every two adjacent rear gear rings (2.1) is 5 mm.

4. The novel chainless dual speed bicycle of claim 2, wherein: the gear ring end face of one side of each front gear ring (1.1) is fixedly attached to the inner side disc face of the front speed-changing wheel disc (1), and a plurality of semi-cylindrical front tooth sockets (1.1a) are annularly distributed on the gear ring end face of the other side;

the gear ring end face of one side of each rear gear ring (2.1) is fixedly attached to the outer side disc face of the rear speed changing wheel disc (2), a plurality of semi-cylindrical rear tooth sockets (2.1a) are annularly distributed on the gear ring end face of the other side, and the inner side disc face of the rear speed changing wheel disc (2) is correspondingly attached to the left side face of a rear wheel hub of the speed changing bicycle;

a plurality of pedal position pinion bearings (3.6a) which are correspondingly meshed with the semi-cylindrical front tooth socket (1.1a) are uniformly distributed on the outer circumference of the pedal position pinion (3.6);

a plurality of rear wheel position pinion bearings (3.8a) which are correspondingly meshed with the semi-cylindrical rear tooth grooves (2.1a) are uniformly distributed on the outer circumference of the rear wheel position pinion (3.8);

the pedal position pinion (3.6) is correspondingly meshed and connected with a semi-cylindrical front tooth socket (1.1a) arranged on each front gear ring (1.1) with different diameters of the front speed changing wheel disc (1) through a pedal position pinion bearing (3.6a) distributed on the outer circumference of the pedal position pinion so as to realize speed changing adjustment of the pedal position of the speed changing bicycle;

the rear wheel position pinion (3.8) is correspondingly meshed and connected with a semi-cylindrical rear tooth socket (2.1a) arranged on each rear gear ring (2.1) with different diameters of the rear speed changing wheel disc (2) through a rear wheel position pinion bearing (3.8a) distributed on the outer circumference of the rear wheel position pinion so as to realize the speed changing adjustment of the rear wheel position of the speed changing bicycle.

5. The novel chainless dual speed bicycle of claim 4, wherein: a pedal position pinion forward position cut-in groove (1.1b) is further formed in the outer side of a front gear ring (1.1) close to the center of the front speed changing wheel disc (1), a pedal position pinion backward position cut-in groove (1.1c) is further formed in the inner side of the front gear ring (1.1) close to the edge of the front speed changing wheel disc (1), a pedal position pinion forward position cut-in groove (1.1b) is formed in the outer side of each front gear ring (1.1) at the rest of the front speed changing wheel disc (1), and a pedal position pinion backward position cut-in groove (1.1c) is formed in the inner side of each front gear ring (1.1);

a rear wheel position pinion forward position cut-in groove (2.1b) is further formed in the outer side of a rear gear ring (2.1) close to the center of the rear speed changing wheel disc (2), a rear wheel position pinion backward position cut-in groove (2.1c) is further formed in the inner side of the rear gear ring (2.1) close to the edge of the rear speed changing wheel disc (2), a rear wheel position pinion forward position cut-in groove (2.1b) is formed in the outer side of each rear gear ring (2.1) at the rest of the rear speed changing wheel disc (2), and a rear wheel position pinion backward position cut-in groove (2.1c) is formed in the inner side of each rear gear ring (2.1);

the pedal position pinion forward position cut-in groove (1.1b) is used for facilitating forward cutting of the pedal position pinion (3.6) into the front gear ring (1.1) of the inner layer from the front gear ring (1.1) of the outer layer when the bicycle is subjected to speed change adjustment, and the pedal position pinion backward position cut-in groove (1.1c) is used for facilitating backward cutting of the pedal position pinion (3.6) into the front gear ring (1.1) of the outer layer from the front gear ring (1.1) of the inner layer when the bicycle is subjected to speed change adjustment;

the rear wheel position pinion forward position cut-in groove (2.1b) is used for facilitating the rear wheel position pinion (3.8) to be forward cut into the rear gear ring (2.1) of the inner layer from the rear gear ring (2.1) of the outer layer when the bicycle is subjected to variable speed adjustment, and the rear wheel position pinion backward position cut-in groove (2.1c) is used for facilitating the rear wheel position pinion (3.8) to be backward cut into the rear gear ring (2.1) of the outer layer from the rear gear ring (2.1) of the inner layer when the bicycle is subjected to variable speed adjustment.

6. The novel chainless dual speed bicycle of claim 5, wherein: a right pedal crank (11) is arranged on the outer side of the front speed changing wheel disc (1), one end of the right pedal crank (11) is attached to the disc surface on the outer side of the front speed changing wheel disc (1) and coaxially sleeved on the pedal shaft (4) with the front speed changing wheel disc (1), and the other end of the right pedal crank is connected with a right pedal (13) of the speed changing bicycle;

one end of the pedal shaft (4) is connected with the front speed changing wheel disc (1) and the right pedal crank (11) in a rotating fit mode, the other end of the pedal shaft penetrates through a frame (15) of the speed changing bicycle to be connected with the left pedal crank (12) in a rotating fit mode, and the left pedal crank (12) is connected with a left pedal (14) of the speed changing bicycle.

7. The novel chainless dual speed change bicycle according to any one of claims 2 to 6, wherein: the speed regulation main shaft (3) comprises a main shaft (3.1), a main shaft sleeve A (3.2), a main shaft sleeve B (3.3), a main shaft sleeve C (3.4), a pedal position plane bearing (3.5), a pedal position pinion (3.6), a rear wheel position plane bearing A (3.7), a rear wheel position pinion (3.8), a rear wheel position plane bearing B (3.9), a pedal position spring (3.10), a rear wheel position spring (3.11), a pedal position pinion positioning pin (3.12), a rear wheel position pinion positioning pin (3.13), a pedal position steel wire rope (3.14) and a rear wheel position steel wire rope (3.15);

the main shaft (3.1) sequentially penetrates through the main shaft sleeve A (3.2), the pedal position plane bearing (3.5), the main shaft sleeve B (3.3), the main shaft sleeve C (3.4), the rear wheel position plane bearing A (3.7) and the rear wheel position plane bearing B (3.9), one end of the main shaft (3.1) is fixedly connected with a frame at the pedal position, and the other end of the main shaft is fixedly connected with the frame at the rear wheel position;

one end of the pedal position plane bearing (3.5) is fixedly connected with the spindle sleeve A (3.2), and the other end of the pedal position plane bearing is abutted against the pedal position pinion (3.6);

the pedal position pinion (3.6) is assembled between the spindle sleeve B (3.3) and the pedal position plane bearing (3.5) and fixedly sleeved on the end part of one end, close to the pedal position plane bearing (3.5), of the spindle sleeve B (3.3);

one end, far away from the pedal position plane bearing (3.5), of the spindle sleeve B (3.3) is connected with one end of the spindle sleeve C (3.4) in a sliding fit manner, the other end of the spindle sleeve C (3.4) is fixedly connected with one end of the rear wheel position plane bearing A (3.7), the other end of the rear wheel position plane bearing A (3.7) is abutted against the rear wheel position plane bearing B (3.9), the rear wheel position pinion (3.8) is positioned between the rear wheel position plane bearing A (3.7) and the rear wheel position plane bearing B (3.9) and fixedly sleeved on the end part, close to one end of the rear wheel position plane bearing B (3.9), of the rear wheel position plane bearing A (3.7);

the pedal position spring (3.10) is sleeved on the spindle sleeve A (3.2), one end of the pedal position spring (3.10) is abutted with the pedal position plane bearing (3.5), and the other end of the pedal position spring is abutted with the frame at the pedal position;

the rear wheel position spring (3.11) is sleeved on the main shaft sleeve C (3.4), one end of the rear wheel position spring (3.11) is abutted with the rear wheel position plane bearing A (3.7), and the other end of the rear wheel position spring is abutted with one end, far away from the pedal position pinion (3.6), of the main shaft sleeve B (3.3);

the pedal position pinion positioning pin (3.12) is arranged in the pedal position plane bearing (3.5);

the rear wheel position pinion positioning pin (3.13) is arranged in the rear wheel position plane bearing B (3.9);

one end of the pedal position steel wire rope (3.14) is connected with the pedal position plane bearing (3.5), and the other end of the pedal position steel wire rope is connected with a pedal position speed changer (7) arranged on a handlebar bracket (6) of the speed-changing bicycle;

one end of the rear wheel position steel wire rope (3.15) is connected with the rear wheel position plane bearing B (3.9), and the other end is connected with a rear wheel position speed changer (8) arranged on a handlebar bracket (6) of the speed-changing bicycle;

the pedal position speed changer (7) and the rear wheel position speed changer (8) are symmetrically arranged at two ends of the handlebar support (6) close to the left and right handlebars (9 and 10) of the speed-changing bicycle.

8. The novel chainless dual speed bicycle of claim 7, wherein: one end of the main shaft (3.1) close to the pedal shaft (4) is provided with a pedal position long strip hole (3.1a), and the pedal position long strip hole (3.1b) is in sliding fit with the pedal position pinion positioning pin (3.12);

a rear wheel position long hole (3.1b) is formed in one end, close to a rear wheel shaft (5), of the main shaft (3.1), and the rear wheel position long hole (3.1b) is in sliding fit with the rear wheel position pinion positioning pin (3.13);

a rear axle hole (3.1c) is further formed in one end, close to the rear axle (5), of the main shaft (3.1), and the main shaft (3.1) is connected with the rear axle (5) in a rotating fit mode through the rear axle hole (3.1 c);

still be equipped with a keyway (3.4a) on the outer wall of main shaft sleeve C (3.4) still be equipped with on the inner wall of main shaft sleeve B (3.3) one with keyway (3.4a) looks sliding fit's slide rail (3.3a), main shaft sleeve B (3.3) through slide rail (3.3a) that its inner wall was equipped with keyway (3.4a) looks sliding fit that is equipped with on the outer wall of main shaft sleeve C (3.4).

9. The novel chainless dual speed change bicycle according to any one of claims 2 to 6, wherein: the speed regulation main shaft (3) comprises a transmission main shaft (3.1 '), a pedal position outer bearing (3.2'), a rear wheel position outer bearing (3.3 '), a pedal position inner bearing (3.4'), a rear wheel position inner bearing (3.5 '), a pedal position screw rod (3.6'), a rear wheel position adjusting screw rod (3.7 '), a pedal position pinion (3.6), a rear wheel position pinion (3.8) and a pedal position screw rod nut (3.8'), the device comprises a rear wheel position screw nut (3.9 '), a pedal position screw nut positioning pin (3.10 '), a rear wheel position screw nut positioning pin (3.11 '), a pedal position micro reducer (3.12 '), a rear wheel position micro reducer (3.13 '), a pedal position micro stepping motor (3.14 '), a rear wheel position micro stepping motor (3.15 '), a pedal position lithium battery (3.16 '), a rear wheel position lithium battery (3.17 '), a pedal position micro stepping motor wireless driver (3.18 ') and a rear wheel position micro stepping motor wireless driver (3.19 ');

the pedal position outer bearing (3.2 ') and the rear wheel position outer bearing (3.3 ') are respectively arranged at two ends of the transmission main shaft (3.1 ') and are respectively fixed on bearing seats arranged on a frame at the pedal position and the rear wheel position of the speed-changing bicycle;

the transmission main shaft (3.1 ') is also provided with a first strip-shaped groove (3.1 a') and a second strip-shaped groove (3.1b '), and the pedal position inner bearing (3.4'), the pedal position screw rod (3.6 '), the pedal position screw rod nut (3.8'), the pedal position micro speed reducer (3.12 '), the pedal position micro stepping motor (3.14'), the pedal position lithium battery (3.16 ') and the pedal position micro stepping motor wireless driver (3.18') are all arranged in the first strip-shaped groove (3.1a ') of the transmission main shaft (3.1'); the rear wheel position inner bearing (3.5 '), the rear wheel position screw rod (3.7 '), the rear wheel position screw rod nut (3.9 '), the rear wheel position micro speed reducer (3.13 '), the rear wheel position micro stepping motor (3.15 '), the rear wheel position lithium battery (3.17 ') and the rear wheel position micro stepping motor wireless driver (3.19 ') are all arranged in a second strip-shaped groove (3.1b ') of the transmission main shaft (3.1 ');

one end of the pedal position screw rod (3.6 ') is connected with the pedal position inner bearing (3.4'), the other end of the pedal position screw rod penetrates through a pedal position screw rod nut (3.8 ') and is connected with the pedal position micro reducer (3.12'), the pedal position inner bearing (3.4 ') is correspondingly positioned inside the pedal position outer bearing (3.2'), the pedal position micro reducer (3.12 ') is correspondingly connected with the pedal position micro stepping motor (3.14'), the pedal position micro stepping motor (3.14 ') is correspondingly and electrically connected with the pedal position micro stepping motor wireless driver (3.18'), and the pedal position micro stepping motor wireless driver (3.18 ') is correspondingly and electrically connected with the pedal position lithium battery (3.16');

one end of the rear wheel position screw rod (3.7 ') is connected with the rear wheel position inner bearing (3.5'), the other end of the rear wheel position screw rod is connected with the rear wheel position micro reducer (3.13 ') after penetrating through a rear wheel position screw rod nut (3.9'), the rear wheel position inner bearing (3.5 ') is correspondingly positioned inside the rear wheel position outer bearing (3.3'), the rear wheel position micro reducer (3.13 ') is correspondingly connected with the rear wheel position micro stepping motor (3.15'), the rear wheel position micro stepping motor (3.15 ') is correspondingly electrically connected with the rear wheel position micro stepping motor wireless driver (3.19'), and the rear wheel position micro stepping motor wireless driver (3.19 ') is correspondingly electrically connected with the rear wheel position lithium battery (3.17');

the pedal position small gear (3.6) and the rear wheel position small gear (3.8) are sleeved on the transmission main shaft (3.1 '), the pedal position small gear (3.6) is fixedly connected with the pedal position screw nut (3.8 ') through a pedal position screw nut positioning pin (3.10 '), the rear wheel position small gear (3.8) is fixedly connected with the rear wheel position screw nut (3.9 ') through a rear wheel position screw nut positioning pin (3.11 '), the pedal position screw nut (3.8 ') is in threaded fit with the pedal position screw rod (3.6 '), and the rear wheel position screw nut (3.9 ') is in threaded fit with the rear wheel position screw rod (3.7 ');

the pedal position micro stepping motor wireless driver (3.18 ') and the rear wheel position micro stepping motor wireless driver (3.19') are correspondingly and wirelessly communicated with a stepping motor remote control speed regulator arranged on a handlebar support (6) of the speed-changing bicycle, and the stepping motor remote control speed regulator is correspondingly and electrically connected with the pedal position lithium battery (3.16 ') or the rear wheel position lithium battery (3.17').

10. The novel chainless dual speed bicycle of claim 9, wherein: the transmission main shaft (3.1 ') is further provided with a plurality of pedal position screw nut positioning pin chutes (3.1c ') and a plurality of rear wheel position screw nut positioning pin chutes (3.1d '), each pedal position screw nut positioning pin chute (3.1c ') is correspondingly matched with one pedal position screw nut positioning pin (3.10 ') in a sliding manner, and each rear wheel position screw nut positioning pin chute (3.1d ') is correspondingly matched with one rear wheel position screw nut positioning pin (3.11 ') in a sliding manner.

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