CN210942113U

CN210942113U - Double-chain difference transmission ratio labor-saving mechanism for bicycle

Info

Publication number: CN210942113U
Application number: CN201921922816.4U
Authority: CN
Inventors: 禹正柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-07-07
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a double-chain difference transmission ratio labor-saving mechanism for a bicycle, which comprises a central shaft, a right pedal arm is fixed at the right end of the central shaft, a left pedal arm is fixed at the left end of the central shaft, a resistance arm is welded at one side of the right pedal arm, the resistance arm is fixed with a thirty-six tooth chain wheel through a connecting shaft, the thirty-six tooth chain wheel is embedded on the central shaft through a first bearing, a first flywheel is arranged at the rear side of the thirty-six tooth chain wheel through chain transmission, a forty-tooth chain wheel is arranged at the left side of the thirty-six tooth chain wheel, a second flywheel is arranged at the rear side of the forty-tooth chain wheel through chain transmission, an eighteen tooth chain wheel is integrally formed at the left side of the forty-tooth chain wheel, the forty-tooth chain wheel and the eighteen tooth chain wheel are embedded on the central shaft through a second bearing, a first gear is fixed at the left side of the central shaft, a second gear, the ten-tooth chain wheel is in transmission connection with the eighteen-tooth chain wheel, the structure is simple, the climbing is labor-saving, and the climbing is convenient.

Description

Double-chain difference transmission ratio labor-saving mechanism for bicycle

Technical Field

The utility model belongs to the technical field of bicycle drive mechanism, concretely relates to two chain difference nature drive ratio laborsaving mechanisms for bicycle.

Background

Bicycles, also known as bicycles or bicycles, are typically two-wheeled small land vehicles. After a person rides the vehicle, the person steps on the pedal as power, and the vehicle is a green and environment-friendly vehicle. The bicycle frame, front fork, handlebar, saddle and front fork assembly are the main body of the bicycle. The transmission part comprises pedals, a crank, a chain wheel, a chain, a middle shaft, a flywheel and the like, the pedals are manually stepped, and the transmission parts drive the wheels to rotate so as to drive the vehicle to move forwards.

Most of the existing bicycles drive a flywheel to rotate under the driving of a chain through a chain wheel, and the bicycle can be driven to run uphill by riding with more labor, so that a double-chain differential transmission ratio labor-saving mechanism for the bicycle is necessary to be designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laborsaving mechanism of double-chain difference nature drive ratio for bicycle to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a double-chain difference transmission ratio labor-saving mechanism for a bicycle comprises a center shaft, wherein a right pedal arm is fixed at the right end of the center shaft, a left pedal arm is fixed at the left end of the center shaft, a resistance arm is welded at one side of the right pedal arm, a connecting shaft is fixed on the resistance arm, a thirty-six-tooth chain wheel is fixed at one end, away from the resistance arm, of the connecting shaft, a first bearing is inlaid in the center of the thirty-six-tooth chain wheel, an inner ring of the first bearing is inlaid on the center shaft, the rear side of the thirty-six-tooth chain wheel is connected with a first flywheel through chain transmission, a rear shaft is fixed at the center of the first flywheel, a forty-tooth chain wheel is arranged on the left side of the thirty-six-tooth chain wheel, a second flywheel is connected with the rear side of the forty-tooth chain wheel through chain transmission, the second flywheel is fixed on the rear shaft, and an eighteen, forty tooth sprocket and eighteen tooth sprocket's center department inlays and has the second bearing, the inner circle of second bearing is inlayed in epaxial, one side that right pedal arm was kept away from to the axis is fixed with first gear, the front side meshing transmission of first gear is connected with the second gear, the center department of second gear is fixed with the front axle, the one end that the second gear was kept away from to the front axle is fixed with ten tooth sprockets, ten tooth sprockets pass through the chain and are connected with eighteen tooth sprocket transmission.

Preferably, the two sides of the thirty-six tooth chain wheel, the forty-tooth chain wheel, the eighteen tooth chain wheel and the first gear are respectively provided with a limiting table, and the limiting tables are clamped on the middle shaft.

Preferably, the right side of the first flywheel is provided with a limiting block, and the limiting block is welded at the right end of the rear shaft.

Preferably, the ends, far away from the central shaft, of the right pedal arm and the left pedal arm are both rotatably connected with pedals.

Preferably, the first flywheel and the second flywheel are sixteen teeth.

Preferably, the first gear and the second gear are each forty teeth.

Compared with the prior art, the beneficial effects of the utility model are that:

when the pedal of the utility model is stepped on forwards, the first gear on the left side of the middle axle of the bicycle simultaneously rotates forwards, then the second gear meshed with the middle axle on the front axle reversely rotates backwards, then the ten-tooth chain wheel is driven to rotate backwards, then the ten-tooth chain wheel drives the eighteen-tooth chain wheel and the forty-tooth chain wheel to rotate backwards through the chain, further the forty-tooth chain wheel drives the second flywheel to rotate backwards through the chain, the double chain is a forward and reverse rotation during riding, when the pedal arm is stepped on forwards, the transmission ratio is 1:2.25, the transmission ratio of the reverse chain is zero, when the pedal is stepped on reversely, the forty-tooth chain wheel drives the second flywheel to rotate forwards, the thirty-six-tooth chain wheel is reversed backwards, the transmission ratio is changed from the original 1:2.25 instant second to 1:1.38, the transmission ratio of the reverse chain is zero, the difference of the double-chain labor-saving bicycle is in the riding process, according to the ground slope, the double pedals instantaneously change forwards and backwards, the bicycle is ridden by changing the transmission ratio, the transmission ratio of 1:2.25 adopts the effect of leverage, the bicycle is more labor-saving when being ridden, when a large gradient is encountered in the riding process, the bicycle is changed into a bicycle with two feet in an instant second to be treaded reversely, and the transmission ratio at the moment is changed into: 1:1.38, the bicycle is more labor-saving when riding on a slope, and when riding on a 30-degree slope road surface and riding to a certain slope, the bicycle can smoothly ride on the slope by only changing double pedals to be reversely stepped in seconds.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic view of the chain of the present invention with the structure removed;

fig. 3 is an exploded view of the present invention.

Reference numerals: 1. a middle shaft; 2. a right pedal arm; 3. a left pedal arm; 4. a resistance arm; 5. a connecting shaft; 6. thirty-six tooth chain wheels; 7. a first bearing; 8. a first flywheel; 9. a rear axle; 10. a forty-tooth sprocket; 11. a second flywheel; 12. eighteen-tooth chain wheels; 13. a second bearing; 14. a first gear; 15. a second gear; 16. a front axle; 17. a ten-tooth sprocket; 18. a limiting table; 19. a limiting block; 20. a foot pedal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a technical scheme: as shown in fig. 1, a double-chain differential transmission ratio labor-saving mechanism for a bicycle comprises a central shaft 1, wherein a right pedal arm 2 is fixed at the right end of the central shaft 1, a left pedal arm 3 is fixed at the left end of the central shaft 1, and pedals 20 are rotatably connected at one ends of the right pedal arm 2 and the left pedal arm 3, which are far away from the central shaft 1, for the convenience of pedaling;

as shown in fig. 1 and 2, a resistance arm 4 is welded on one side of a right pedal arm 2, a connecting shaft 5 is fixed on the resistance arm 4, one end, far away from the resistance arm 4, of the connecting shaft 5 is fixed with a thirty-six tooth chain wheel 6, a first bearing 7 is embedded in the center of the thirty-six tooth chain wheel 6, the inner ring of the first bearing 7 is embedded on a middle shaft 1, the rear side of the thirty-six tooth chain wheel 6 is connected with a first flywheel 8 through chain transmission, and a rear shaft 9 is fixed in the center of the first flywheel 8;

as shown in fig. 1-3, a forty-tooth sprocket 10 is arranged on the left side of a thirty-six tooth sprocket 6, the rear side of the forty-tooth sprocket 10 is connected with a second flywheel 11 through chain transmission, the second flywheel 11 is fixed on a rear shaft 9, an eighteen-tooth sprocket 12 is integrally formed on the left side of the forty-tooth sprocket 10, a second bearing 13 is embedded in the centers of the forty-tooth sprocket 10 and the eighteen-tooth sprocket 12, the inner ring of the second bearing 13 is embedded on a center shaft 1, a first gear 14 is fixed on one side of the center shaft 1, which is far away from a right pedal arm 2, a second gear 15 is engaged and connected with the front side of the first gear 14 in a transmission manner, a front shaft 16 is fixed in the center of the second gear 15, a ten-tooth sprocket 17 is fixed on one end of the front shaft 16, which is far away from the second gear 15, the ten-tooth sprocket 17 is in transmission connection with the eighteen-tooth sprocket 12 through a chain, the first flywheel;

as shown in fig. 1 and 3, the two sides of the thirty-six toothed chain wheel 6, the forty-five toothed chain wheel 10, the eighteen toothed chain wheel 12 and the first gear 14 are respectively provided with a limiting table 18, the limiting table 18 is clamped on the middle shaft 1 to play a limiting role, the right side of the first flywheel 8 is provided with a limiting block 19, the limiting block 19 is welded at the right end of the rear shaft 9 to prevent the first flywheel 8 from sliding out of the rear shaft 9, and a limiting protection effect is achieved.

The working principle is as follows: when the pedal 20 is stepped on forwards, the first gear 14 on the left side of the middle shaft 1 of the bicycle simultaneously rotates forwards, then the second gear 15 meshed with the middle shaft 16 on the front shaft rotates backwards in the reverse direction, and then the ten-tooth chain wheel 17 rotates backwards, and then the ten-tooth chain wheel 17 drives the eighteen-tooth chain wheel 12 and the forty-tooth chain wheel 10 to rotate backwards through the chain, and then the forty-tooth chain wheel 10 drives the second flywheel 11 to rotate backwards through the chain, the double chains rotate forwards and backwards during riding, the transmission ratio when the pedal arm is stepped on forwards is 1:2.25, and the transmission ratio of the reversed chains is zero;

when the pedal 20 is stepped on reversely, the forty-tooth chain wheel 10 drives the second flywheel 11 to rotate forwards, the thirty-six tooth chain wheel 6 rotates backwards, the transmission ratio at the moment is changed from 1:2.25 to 1:1.38 instantly for a second, the transmission ratio of a reversing chain is zero, the double-chain difference labor-saving bicycle changes the transmission ratio to ride according to the ground slope instantly in a forward and backward direction of the pedal 20 at any moment and adopts the lever force effect, the bicycle is more labor-saving during riding, when a large slope is encountered in the process of riding, the pedal is changed to be reversely stepped on by two feet instantly in a second, and the transmission force ratio at the moment is changed into: 1:1.38, the bicycle is more labor-saving when riding on a slope, and when riding on a 30-degree slope road surface and riding to a certain slope, the bicycle can smoothly ride on the slope by changing the pedal to be reversely stepped for 20 seconds.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a bicycle is with laborsaving mechanism of double-chain difference drive ratio, includes axis (1), its characterized in that: the bicycle pedal is characterized in that a right pedal arm (2) is fixed at the end part of the right end of the center shaft (1), a left pedal arm (3) is fixed at the end part of the left end of the center shaft (1), a resistance arm (4) is welded at one side of the right pedal arm (2), a connecting shaft (5) is fixed on the resistance arm (4), a thirty-six-tooth chain wheel (6) is fixed at one end, away from the resistance arm (4), of the connecting shaft (5), a first bearing (7) is embedded at the center of the thirty-six-tooth chain wheel (6), an inner ring of the first bearing (7) is embedded on the center shaft (1), the rear side of the thirty-six-tooth chain wheel (6) is connected with a first flywheel (8) through chain transmission, a rear shaft (9) is fixed at the center of the first flywheel (8), a forty-tooth chain wheel (10) is arranged on the left side of the thirty-six-tooth chain wheel (6), and a second flywheel, second flywheel (11) are fixed on rear axle (9), the left side integrated into one piece of forty-teeth sprocket (10) has eighteen teeth sprocket (12), the center department of forty-teeth sprocket (10) and eighteen teeth sprocket (12) inlays and has second bearing (13), the inner circle of second bearing (13) is inlayed on axis (1), one side that right pedal arm (2) was kept away from in axis (1) is fixed with first gear (14), the front side meshing transmission of first gear (14) is connected with second gear (15), the center department of second gear (15) is fixed with front axle (16), the one end that second gear (15) were kept away from in front axle (16) is fixed with ten teeth sprocket (17), ten teeth sprocket (17) are connected with eighteen teeth sprocket (12) transmission through the chain.

2. The dual chain differential drive ratio labor saving mechanism for a bicycle of claim 1, wherein: the two sides of the thirty-six tooth chain wheel (6), the forty-six tooth chain wheel (10), the eighteen tooth chain wheel (12) and the first gear (14) are respectively provided with a limiting table (18), and the limiting tables (18) are connected to the middle shaft (1) in a clamping mode.

3. The dual chain differential drive ratio labor saving mechanism for a bicycle of claim 1, wherein: the right side of the first flywheel (8) is provided with a limiting block (19), and the limiting block (19) is welded at the right end of the rear shaft (9).

4. The dual chain differential drive ratio labor saving mechanism for a bicycle of claim 1, wherein: and one ends of the right pedal arm (2) and the left pedal arm (3) far away from the middle shaft (1) are both rotatably connected with a pedal (20).

5. The dual chain differential drive ratio labor saving mechanism for a bicycle of claim 1, wherein: the first flywheel (8) and the second flywheel (11) are sixteen teeth.

6. The dual chain differential drive ratio labor saving mechanism for a bicycle of claim 1, wherein: the first gear (14) and the second gear (15) are forty teeth.