CN111942515A

CN111942515A - Chainless driving speed-changing bicycle

Info

Publication number: CN111942515A
Application number: CN202010863410.4A
Authority: CN
Inventors: 李永涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-11-17
Also published as: CN110341875A; CN111942516A; CN111942517A; CN110341875B

Abstract

The invention discloses a chainless driving speed-changing bicycle. The front tube type bicycle is characterized by comprising a front tube, wherein the upper end of the front tube is rotatably connected with a handle, the lower end of the front tube is rotatably connected with a front fork, and the lower end of the front fork is connected with a front wheel in a rolling manner. The device of the invention replaces a conventional chain to transmit power by arranging the transmission arm, the upper arc-shaped rack, the lower arc-shaped rack, the arc-shaped rack and the first speed changing slide block, ensures that wheels can always keep rotating in one direction when the racks move back and forth alternatively without reversing the rotating direction of the output shaft by arranging 2 unidirectional ball gears which are arranged in the positive and negative directions, and can act on the rear wheel when feet act on the pedals up and down by arranging the upper arc-shaped rack and the lower arc-shaped rack simultaneously left and right so as to drive the wheels to run.

Description

Chainless driving speed-changing bicycle

The application has the following application numbers: 2019107759557, the name is: the invention patent application of 'a chainless driving speed-changing bicycle' is divided into separate applications, and the application dates of the original applications are as follows: year 2019, month 08, and day 22.

Technical Field

The invention relates to the technical field of bicycles, in particular to a chainless driving speed-changing bicycle.

Background

Bicycles, also known as bicycles or bicycles, usually two-wheeled small land vehicles; after a person rides a vehicle, the person steps on the pedal as power, so that the vehicle is a green environment-friendly vehicle and can be used as an environment-friendly vehicle for riding instead of walking and going out; more and more people use bicycles as fitness equipment for riding exercise and bicycle travel; the bicycle is also a sports competition, such as a road bike race, a mountain bike race, a field bike race, a stunt bike race and the like;

the common bicycle transmission modes at present are as follows: chain drive, shaft drive, and belt drive. Compared with other transmission modes, the chain transmission is widely applied, has simple and light structure, easy maintenance and stable transmission, but is often in the embarrassment situation of chain falling. The shaft-driven bicycle utilizes the transmission shaft to carry out power transmission, and the condition of chain falling can not occur. But the processing requirement precision of the transmission shaft is high, the cost is high, the profits of the bicycle are low, and the transmission shaft with reliable quality cannot be produced by common bicycle enterprises. The final belt drive is sensitive to temperature changes, weak in environmental factor resistance and expensive, and a special frame is required for installation and use. The speed change of the chain-driven bicycle adopts a front derailleur and a rear derailleur to drive a chain to be combined on corresponding chain wheels so as to obtain a corresponding transmission ratio, and the bicycle with a middle shaft gearbox adopts gear combination speed change, but the corresponding price is expensive; there is a lack of a better and simpler bicycle transmission and shifting device.

Disclosure of Invention

The invention mainly aims to provide a chainless driving speed-changing bicycle which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a chainless driving speed-changing bicycle comprises a front tube, wherein the upper end of the front tube is rotatably connected with a handle, the lower end of the front tube is rotatably connected with a front fork, the lower end of the front fork is connected with a front wheel in a rolling manner, one side of the front tube is fixedly connected with an upper tube body and a lower tube body, one end of the upper tube body is fixedly connected with a seat tube, the upper end of the seat tube is screwed with a seat cushion, one side of the middle part of the seat tube is fixedly connected with a rear upper fork, the lower side of the seat tube is fixedly connected with a rear lower fork, the lower side of the seat tube is rotatably connected with a first middle shaft, one end of the first middle shaft is provided with a first crank, one side of the first crank is fixedly connected with a sliding block, one side of the sliding block is rotatably connected with a second crank, the lower end of the second crank is rotatably connected with a pedal, one side of the, the other side of the swing arm is provided with a variable-speed gear position and a second traction line, one side of the swing arm is connected with a second variable-speed slide block in a sliding manner through a variable-speed slideway, one end of the variable-speed gear position is provided with a first positioning roller, one end of the second variable-speed slide block is fixedly connected with a movable shaft through a force transmission connecting rod, one side of the movable shaft is connected with a driving swing rod in a sliding manner, one end of the driving swing rod is fixedly connected with a third middle shaft, the inner side of the driving swing rod is connected with a first variable-speed slide block in a sliding manner, the inner side of the driving swing rod is provided with a reset spring and a first traction line, the outer side of the driving swing rod is connected with a second positioning roller in a rolling manner, one side of the first variable-speed slide block is fixedly connected with a force transmission arm, the rolling bearing is rotatably connected with a one-way ball gear through a rolling shaft, an inner arm of the one-way ball gear is provided with an inner ratchet wheel and a pawl, and the middle part of the one-way ball gear is rotatably connected with a rear wheel through a rear shaft.

Furthermore, the first middle shaft, the first cranks, the second crank pedal and the sliding block jointly form a driving assembly, the two first cranks are 180 degrees mutually and are connected with each other through the first middle shaft, the two second cranks are respectively connected with the first cranks through the sliding block, the angle between the second cranks and the first cranks is 130 degrees, when the pedals are stepped on, one foot is perpendicular to the center of the middle shaft and is horizontal when being positioned at an upper stop point and a lower stop point, and when the other foot acts on the pedal plate, the included angle between the two second cranks is 130 degrees, when the sliding block is positioned at the highest position of the guide groove, the sliding block and the second middle shaft form the maximum force arm, and at the moment, the sliding block is in the most labor-saving state.

Furthermore, the swing arms are symmetrically and fixedly arranged on two sides of the rear lower fork through a second middle shaft and can swing, and the rotation of the sliding block drives the guide grooves to enable the swing arms to swing up and down along the second middle shaft in an alternating mode through the rotation of the second crank.

Furthermore, the force transmission connecting rod is positioned between the swing arm and the driving swing rod, and guides the swing of the swing arm to swing on the driving swing rod.

Furthermore, the driving swing rod is fixed on two sides of the rear lower fork through a third middle shaft and can swing, saw-toothed tooth positions are arranged on two sides of the driving swing rod, the position of the first speed change sliding block is adjusted through the position change of the second positioning roller, and the first traction line is pulled through the reset spring to be connected to achieve the speed change reset function.

Furthermore, the transmission arm, the upper arc-shaped rack, the lower arc-shaped rack, the arc-shaped rack and the first speed changing slide block form a transmission assembly, the upper arc-shaped rack is meshed with a one-way ball gear placed in the forward direction, the lower arc-shaped rack is meshed with a one-way ball gear placed in the reverse direction, and the one-way ball gears are driven to rotate respectively through periodic movement of the racks, so that the wheels are driven to rotate.

Furthermore, the one-way ball gear is composed of an inner ratchet wheel, a pawl, a rolling bearing and a rolling shaft, the rolling bearing enables the one-way ball gear with one-way action to only allow one-way rotation, a pair of one-way ball gears which are placed in the positive direction and the negative direction are installed on the left side and the right side of the rear wheel, and the number of the one-way ball gears is two on one side.

Furthermore, the second speed-changing sliding block moves along the speed-changing slide way, so that the length of the arc-shaped rack moving in a working cycle can be changed by changing the lengths of the power arm and the resistance arm through the meshing of the first positioning roller and different speed-changing tooth positions, the transmission ratio is changed by the tooth number meshed with the one-way ball gear when different speeds are realized, and the front speed-changing device is connected with the speed-changing finger through a second traction line to realize a speed-changing adjusting function.

Compared with the prior art, the invention has the following beneficial effects:

1. the device of the invention replaces the conventional chain to transmit power by arranging the transmission arm, the upper arc-shaped rack, the lower arc-shaped rack, the arc-shaped rack and the first speed changing slide block, and realizes that the power drives the vehicle to advance by meshing two groups of racks which are not on the same horizontal plane with the one-way ball gear;

2. the device realizes the function of speed change regulation by connecting a traction wire with a speed change finger, so that the position of a swing arm and a driving swing rod changes, the flywheel rotates rapidly when the rack moves in a long stroke, and the flywheel rotates slowly when the rack moves in a short stroke; changing the positions of the second gearshift slider and the first gearshift slider in the gearshift slide and the drive rocker causes the rack to change the length of the back and forth movement during one cycle, and thus the transmission ratio;

3. the device has the advantages that the rack can ensure that the wheels can always keep rotating in one direction when the rack does not reverse the rotating direction of the output shaft by arranging the two unidirectional ball gears which are arranged in the positive and negative directions, and the rack can ensure that the wheels can always rotate in one direction when moving back and forth alternately, and the rack can ensure that feet can act on the rear wheel when acting on the pedal plate up and down by arranging the upper arc rack and the lower arc rack on the left and right sides simultaneously so as to drive the wheels to run;

4. compared with the conventional bicycle, the bicycle has the advantages of novel speed change, simple structure, multiple speed ratios, labor saving in riding, difficult damage to parts and high energy transfer efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of a transmission part of the invention.

Fig. 3 is a schematic view of the second crank structure of the present invention.

Fig. 4 is a schematic view of the swing arm structure of the present invention.

Fig. 5 is a schematic structural diagram of a driving swing link according to the present invention.

Fig. 6 is a schematic view of the rack structure of the present invention.

FIG. 7 is a schematic view of the inner arm structure of the one-way ball gear of the present invention.

FIG. 8 is a schematic view of the structure of the outer arm of the one-way ball gear of the present invention.

In the figure: 1. a head tube; 2. a handle; 3. a front fork; 4. a front wheel; 5. a pipe body is arranged; 6. a seat cushion; 7. a rear upper fork; 8. a rear wheel; 9. an arc-shaped rack; 10. a lower pipe body; 11. a seat tube; 12. a one-way ball gear; 13. a rear lower fork; 14. a force transfer link; 15. a first bottom bracket; 16. a first crank; 17. swinging arms; 18. a second crank; 19. pedaling; 20. a second middle axis; 21. a movable shaft; 22. a third middle axis; 23. driving a swing rod; 24. a force transmission arm; 25. a slider; 26. a rear axle; 27. a guide groove; 28. a gear position for speed change; 29. a return spring; 30. a first speed change slider; 31. a first traction wire; 32. a first positioning roller; 33. a second speed change slider; 34. a second traction wire; 35. a variable speed slide; 36. an upper arc-shaped rack; 37. a lower arc-shaped rack; 38. an inner ratchet wheel; 39. a pawl; 40. a roller; 41. a rolling bearing; 42. a second positioning roller;

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 8, a chainless variable speed bicycle comprises a front tube 1, wherein a handle 2 is rotatably connected to the upper end of the front tube 1, a front fork 3 is rotatably connected to the lower end of the front tube 1, a front wheel 4 is rotatably connected to the lower end of the front fork 3, an upper tube body 5 and a lower tube body 10 are fixedly connected to one side of the front tube 1, a seat tube 11 is fixedly connected to one end of the upper tube body 5, a seat cushion 6 is screwed to the upper end of the seat tube 11, a rear upper fork 7 is fixedly connected to one side of the middle of the seat tube 11, a rear lower fork 13 is fixedly connected to the lower side of the seat tube 11, a first middle shaft 15 is rotatably connected to the lower side of the seat tube 11, a first crank 16 is arranged at one end of the first middle shaft 15, a slide block 25 is fixedly connected to one side of the first crank 16, a second crank 18 is rotatably connected to one side of the slide block 25, and a pedal, one side of the rear lower fork 13 is rotatably connected with a swing arm 17 through a second middle shaft 20, one side of the swing arm 17 is provided with a guide groove 27, the other side of the swing arm 17 is provided with a speed change gear position 28 and a second traction wire 34, one side of the swing arm 17 is slidably connected with a second speed change slider 33 through a speed change slideway 35, one end of the speed change gear position 28 is provided with a first positioning roller 32, one end of the second speed change slider 33 is fixedly connected with a movable shaft 21 through a force transmission connecting rod 14, one side of the movable shaft 21 is slidably connected with a driving swing rod 23, one end of the driving swing rod 23 is fixedly connected with a third middle shaft 22, the inner side of the driving swing rod 23 is slidably connected with a first speed change slider 30, the inner side of the driving swing rod 23 is provided with a return spring 29 and a first traction wire 31, the outer side of the driving swing rod 23 is rotatably connected with a second positioning roller 42, one end of the transmission arm 24 is fixedly connected with an arc rack 9 through an upper arc rack 36 and a lower arc rack 37, the upper arc rack 36 and the lower arc rack 37 are rotatably connected with a rolling bearing 41, the rolling bearing 41 is rotatably connected with a one-way ball gear 12 through a rolling shaft 40, an inner arm of the one-way ball gear 12 is provided with an inner ratchet 38 and a pawl 39, and the middle part of the one-way ball gear 12 is rotatably connected with a rear wheel 8 through a rear shaft 26.

Wherein, the first middle axle 15, the first crank 16, the second crank 18 pedal 19 and the slider 25 jointly form a driving assembly, the two first cranks 16 are 180 degrees with each other, and are connected with each other through the first middle axle 15, the two second cranks 18 are respectively connected with the first cranks 16 through the slider 25, and the angle between the second cranks 18 and the first cranks 16 is 130 degrees, when the pedal 19 is stepped on by the foot, at the top and bottom dead center, one foot is vertical to the horizontal plane relative to the center of the middle axle, and when the other foot acts on the pedal, the included angle between the two second cranks 18 is 130 degrees, when the slider 25 is at the highest position 27, the slider 25 forms the largest force arm with the second middle axle 20, at this time, the most labor-saving state is achieved, the other side of the crank is inclined forwards, at this time, the foot can continuously apply force to drive the wheel to run, the advantage of the arrangement of the cranks is that the dead center of force is, but the crank can not do work when positioned at the upper dead point and the lower dead point, and needs to go past the dead points by means of inertia.

The swing arms 17 are symmetrically and fixedly mounted on two sides of the rear lower fork 13 through the second central shaft 20 and can swing, the rotation of the second crank 18 enables the slide block 25 to rotate to drive the guide grooves 27 to enable the swing arms 17 to swing up and down along the second central shaft 20 in an alternating manner, and the rotation of the crank is converted into stretching motion to drive the arc-shaped rack 9 to move back and forth.

The force transmission connecting rod 14 is positioned between the swing arm 17 and the driving swing rod 23, and guides the swing of the swing arm 17 to the driving swing rod 23 to swing.

The driving swing rod 23 is fixed to two sides of the rear lower fork 13 through the third middle shaft 22 and can swing, saw-toothed tooth positions are arranged on two sides of the driving swing rod 23, the position of the first speed change slider 30 is adjusted through the position change of the second positioning roller 42, the first traction wire 31 is pulled through the return spring 29 to be connected to achieve a speed change reset function, the direct movement of the rack is driven, the effect of coordinating speed change adjustment is achieved, multi-stage speed change is achieved, and the reset function is achieved.

The transmission assembly is composed of the transmission arm 24, the upper arc-shaped rack 36, the lower arc-shaped rack 37, the arc-shaped rack 9 and the first speed changing slider 30, the upper arc-shaped rack 36 is meshed with a one-way ball gear 12 placed in a forward direction, the lower arc-shaped rack 37 is meshed with a one-way ball gear 12 placed in a reverse direction, the one-way ball gear 12 is driven to rotate respectively through periodic movement of the racks, accordingly, the wheels are driven to rotate, conventional chains are replaced for power transmission, and the vehicles are driven to advance through the meshing of the two groups of racks which are not on the same horizontal plane and the one-way ball gear 12.

The one-way ball gear 12 is composed of an inner ratchet 38, a pawl 39, a rolling bearing 41 and a rolling shaft 40, the rolling bearing 41 enables the one-way ball gear 12 with one-way action to only allow one-way rotation, a pair of one-way ball gears 12 placed in the positive and negative directions are installed on the left side and the right side of the rear wheel 8, the number of the one-way ball gears 12 is two on one side, friction can be reduced when the one-way ball gears 12 are in contact with the arc-shaped racks, efficiency is improved, the racks can enable the wheels to always keep one-way rotation when moving back and forth in an alternating mode under the condition that the rotation direction of an output shaft is not reversed, a pair of upper arc-shaped racks and a pair of lower arc-shaped racks 9 are placed on the left side and the right side simultaneously.

The second shifting slider 33 moves along the shifting slideway 35, so that the length of the power arm and the resistance arm can be changed by changing the length of the power arm and the resistance arm by the meshing of the first positioning roller 32 and the different shifting tooth positions 28, and the transmission ratio can be changed by the tooth number meshed with the one-way ball gear 12 at different speeds. The front speed changing device is connected with a speed changing finger through a second traction wire 34 to realize a speed changing adjusting function, the change of a force arm is controlled through the position change of the sliding block and the roller, different meshing tooth numbers are realized, and the transmission ratio is improved.

It should be noted that the invention is a chainless driving speed-changing bicycle,

the method comprises the following steps: when the bicycle is used, a user straddles the seat cushion 6, pedals the pedal 19 downwards by feet, so that the second crank 18 rotates to drive the slide block 25 to slide on the guide groove 27, the swing arm 17 swings up and down along the second middle shaft 20, the force transmission connecting rod 14 drives the driving swing rod 23 to swing through the third middle shaft 22, the first variable-speed slide block 30 on one side drives the force transmission arm 24 to move back and forth, the upper arc-shaped rack 36 and the lower arc-shaped rack 37 respectively drive the one-way ball gear 12 to rotate through the rolling bearing 41 sequentially, so that the bicycle moves forwards and continuously reciprocates, the lower arc-shaped rack 37 drives the one-way ball gear 12 to rotate through the other rolling bearing 41, so that the reciprocating driving is realized, when variable-speed driving is required, the traction line is shifted, the second variable-speed slide block 33 drives the first positioning roller 32 to adjust on the variable-speed gear position 28, so that different force arms are formed, the first speed-changing sliding block 30 and the second positioning roller 42 jump to change the length of one working cycle movement of the arc-shaped rack 9, so that the number of teeth meshed with the one-way ball gear 12 at different speeds is changed to change the transmission ratio, and speed change is realized.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as hereinafter claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A chainless transmission bicycle comprising a head tube (1), characterized in that: the upper end of the front pipe (1) is rotatably connected with a handle (2), the lower end of the front pipe (1) is rotatably connected with a front fork (3), the lower end of the front fork (3) is connected with a front wheel (4) in a rolling manner, one side of the front pipe (1) is fixedly connected with an upper pipe body (5) and a lower pipe body (10), one end of the upper pipe body (5) is fixedly connected with a seat pipe (11), the upper end of the seat pipe (11) is screwed with a seat cushion (6), one side of the middle part of the seat pipe (11) is fixedly connected with a rear upper fork (7), the lower side of the seat pipe (11) is fixedly connected with a rear lower fork (13), the lower side of the seat pipe (11) is rotatably connected with a first middle shaft (15), one end of the first middle shaft (15) is provided with a first crank (16), one side of the first crank (16) is fixedly connected with a sliding block (25), one side of the sliding block, the lower end of the second crank (18) is rotatably connected with a pedal (19), one side of the rear lower fork (13) is rotatably connected with a swing arm (17) through a second middle shaft (20), one side of the swing arm (17) is provided with a guide groove (27), the other side of the swing arm (17) is provided with a speed change gear position (28) and a second traction line (34), one side of the swing arm (17) is slidably connected with a second speed change sliding block (33) through a speed change slideway (35), one end of the speed change gear position (28) is provided with a first positioning roller (32), one end of the second speed change sliding block (33) is fixedly connected with a movable shaft (21) through a force transmission connecting rod (14), one side of the movable shaft (21) is slidably connected with a driving swing rod (23), one end of the driving swing rod (23) is fixedly connected with a third middle shaft (22), and the inner side of the driving swing rod (23) is slidably connected, the inner side of the driving swing rod (23) is provided with a return spring (29) and a first traction wire (31), the outer side of the driving swing rod (23) is connected with a second positioning roller (42) in a rolling mode, one side of the first speed change slider (30) is fixedly connected with a transmission arm (24), one end of the transmission arm (24) is fixedly connected with an arc rack (9) through an upper arc rack (36) and a lower arc rack (37), the upper arc rack (36) and the lower arc rack (37) are connected with a rolling bearing (41) in a rotating mode, the rolling bearing (41) is connected with a one-way ball gear (12) in a rotating mode through a rolling shaft (40), an inner arm of the one-way ball gear (12) is provided with an inner ratchet wheel (38) and a pawl (39), and the middle of the one-way ball gear (12) is connected with a rear wheel (8;

the first middle shaft (15), the first cranks (16), the pedals (19) of the second cranks (18) and the sliding blocks (25) jointly form a driving assembly, the two first cranks (16) are mutually 180 degrees and are mutually connected through the first middle shaft (15), the two second cranks (18) are respectively connected with the first cranks (16) through the sliding blocks (25), the angle between the second cranks (18) and the first cranks (16) is 130 degrees, when the pedals (19) are stepped on by the feet, one foot is vertical to the center of the middle shaft and is horizontal, when the other foot acts on the pedal, the included angle between the two second cranks (18) is 130 degrees, when the sliding blocks (25) are positioned at the highest positions of the guide grooves (27), the maximum force is formed between the sliding blocks and the second middle shaft (20), and the most labor-saving state is realized at the moment;

the swing arms (17) are symmetrically and fixedly arranged on two sides of the rear lower fork (13) through the second middle shaft (20) and can swing, and the second crank (18) rotates to enable the sliding block (25) to rotate to drive the guide grooves (27) to enable the swing arms (17) to swing up and down alternately along the second middle shaft (20).

2. The chainless drive speed changing bicycle according to claim 1, wherein: the force transmission connecting rod (14) is positioned between the swing arm (17) and the driving swing rod (23) and guides the swing of the swing arm (17) to swing on the driving swing rod (23).

3. The chainless drive speed changing bicycle according to claim 1, wherein: the driving swing rod (23) is fixed on two sides of the rear lower fork (13) through a third middle shaft (22) and can swing, saw-toothed tooth positions are arranged on two sides of the driving swing rod (23), the position of the first speed change sliding block (30) is adjusted through the position change of the second positioning roller (42), and the first traction line (31) is pulled through the reset spring (29) to be connected to achieve the speed change reset function.

4. The chainless drive speed changing bicycle according to claim 1, wherein: the second speed change sliding block (33) moves along the speed change slide way (35), so that the length of a working cycle of the arc-shaped rack (9) can be changed by changing the lengths of the power arm and the resistance arm through the meshing of the first positioning roller (32) and different speed change gear positions (28), the transmission ratio is changed by the number of teeth meshed with the one-way ball gear (12) when different speeds are realized, and the front speed change device is connected with a speed change finger through a second traction line (34) to realize a speed change adjusting function.