PatSeer

REGENERATIVE BRAKING SYSTEM FOR BICYCLE
Pub. No. IN201611026885A
App. No. IN201611026885
App. No. Original IN201611026885
Appl. Date 05-Aug-2016
Pub. Date 16-Mar-2018
Inventor(s) NAVPREET SINGH, DR RAJDEEP SINGH
Assignee Norm. CHANDIGARH GROUP OF COLLEGES CGC (LANDRAN KHARAR BANUR HIGHWAY SECTOR 112 LANDRAN SAHIBZADA AJIT SINGH NAGAR PUNJAB 140307 PUNJAB INDIA, IN)
Current Assignee CHANDIGARH GROUP OF COLLEGES CGC (LANDRAN KHARAR BANUR HIGHWAY SECTOR 112 LANDRAN SAHIBZADA AJIT SINGH NAGAR PUNJAB 140307 PUNJAB INDIA, IN)
Current Owner CHANDIGARH GROUP OF COLLEGES CGC
IPC B60T1/10
ABSTRACT
The present invention provides a regenerative braking system 20 of a bicycle 1. The regenerative braking system comprises a first double helical gear 14 mounted on a pedal axle 12 ; a second double helical gear 10 mounted on a rear wheel axle 8; a shaft 16 operatively coupling the first and second double helical gears, the shaft contains a double helical gear at each end thereof; and a flywheel 17 arranged on a frame of the bicycle, the flywheel operatively coupled to a sprocket on the rear wheel axle through a drive member 18. The rotational motion of the pedal axle is transferred to the rear wheel axle through the first and second double helical gears and the shaft, and the rotation of the rear wheel axle is further transferred to the flywheel for harvesting.

CLAIMS

1. A regenerative braking system 20 for a bicycle 1, the regenerative braking system comprising: a first double helical gear 14 mounted on a pedal axle 12; a second double helical gear 10 mounted on a rear wheel axle 8; a shaft 16 operatively coupling the first and second double helical gears 14, 12 , wherein the shaft contains a double helical gear at each end thereof; and a flywheel 17 arranged on a frame of the bicycle 1, the flywheel operatively coupled to a sprocket on the rear wheel axle 8 through a drive member 18; wherein rotational motion of the pedal axle 12 is transferred to the rear wheel axle through the first and second double helical gears 14, 12 and the shaft, and the rotation of the rear wheel axle is further transferred to the flywheel 17 for harvesting.

2. The regenerative breaking system as claimed in Claim 1, wherein said flywheel 17 used in said regenerative braking system 20 is preferably of uniform thickness.

3. The regenerative breaking system as claimed in Claim 1, wherein a first bearing 13 is mounted on the pedal axle 12 and a second bearing 09 is mounted on the rear wheel axle 08 to prevent the rotation of the peddle axle 12 during braking.

4. The regenerative breaking system as claimed in Claim 1, wherein said shaft 16 includes a third double helical gear 15 and a fourth double helical gear 11 at its two ends.

5. The regenerative breaking system as claimed in Claim 1 and 4 , wherein said third double helical gear 15 is mounted on the shaft 16 at the end closer to the pedal axle 12 and said fourth double helical gear 11 is mounted at the end closer to the rear wheel axle 08 respectively.

6. The regenerative breaking system as claimed in Claim 1, wherein said drive member 18 may be a chain drive or a belt drive.

7. The regenerative breaking system as claimed in Claim 1, wherein said of double helical gears and said shaft 16 increases power transmission from the pedal axle 12 to the rear wheel axle 08, and also increases the acceleration of the bicycle 01 for the amount of effort applied.

8. The regenerative breaking system as claimed in Claim 1, wherein said system 20 may comprise means for generating electrical energy from the rotation of said flywheel 17 , prefrably generator.


DESCRIPTION
























FIELD OF THE INVENTION

The present invention relates to a regenerative braking system, and more specifically, to a regenerative braking system for bicycles.

BACKGROUND OF THE INVENTION

Bicycle is one of the most widely used forms of transportation in the world. A rider uses the pedals on the bicycle to drive a crank mechanism, which further rotates a rear wheel using a chain-drive to drive the bicycle forward.

The amount of effort required to be exerted by the rider can greatly depend on the type of terrain. For planar terrain, the rider is required to exert an effort that is enough to cancel the frictional resistance offered by the terrain so a moderate amount of effort is required of the rider to drive the bicycle. But if the rider is required to go uphill, a much greater effort is required by virtue of the rider having to work against the component of weight acting away from the direction of motion, which includes their own weight, the weight of the bicycle and any other weight that they might be carrying. Also, if the rider releases the brakes and starts to pedal from a standstill, much effort is required to be exerted to accelerate the bicycle again.

Further, when chain transmission is used in the bicycle, the chain is prone to slippage which can lead to the transmission system being rendered ineffective.

Therefore, in light of the foregoing discussion, there exists a need to overcome the aforementioned drawbacks associated with effort required to be exerted by a bicycle rider for difficult terrains.

SUMMARY OF THE INVENTION

The present invention provides a regenerative braking system for a bicycle. The regenerative braking system comprises a first double helical gear mounted on a pedal axle; a second double helical gear mounted on a rear wheel axle; a shaft operatively coupling the first and second double helical gears, the shaft contains a double helical gear at each end thereof; and a flywheel arranged on a frame of the bicycle, the flywheel operatively coupled to a sprocket on the rear wheel axle through a drive member. The rotational motion of the pedal axle is transferred to the rear wheel axle through the first and second double helical gears and the shaft, and the rotation of the rear wheel axle is further transferred to the flywheel for harvesting.

Embodiments of the present disclosure substantially eliminate or at least partially address the aforementioned problems in the prior art, and enables in reducing the effort required to be exerted by a bicycle rider for difficult terrain.

Additional aspects, advantages, features and objects of the present disclosure would be made apparent from the drawings and the detailed description of the illustrative embodiments construed in conjunction with the appended claims that follow.

It will be appreciated that features of the present disclosure are susceptible to being combined in various combinations without departing from the scope of the present disclosure as defined by the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the present disclosure is not limited to specific instrumentalities disclosed herein. Moreover, those skilled in the art will understand that the drawings are not to scale. Wherever possible, like elements have been indicated by identical numbers.

Embodiments of the present disclosure will now be described, by way of example only, with reference to the following diagrams wherein:

Figure 1 illustrates a schematic side view of a bicycle having a regenerative braking system, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed structure.

Various other objects, advantages, and features of the invention will become more readily apparent to those skilled in the art from the following detailed description when read in conjunction with the accompanying drawings, in which like reference numerals designate like parts throughout the figures thereof.

The present invention relates to a regenerative braking system for a bicycle that uses twin double helical gears for the transmission of rotation from a pedal axle to the rear wheel. The invention also uses a flywheel to store the kinetic energy of the bicycle, such that when a rider of the bicycle needs to ride on a difficult terrain, such as uphill, not much effort is required on the part of the rider to pedal the bicycle. Specifically, the rotational motion of the rear wheel is continuously transferred to the flywheel and when the user uses the brakes to stop the bicycle, the flywheel continues to rotate. As the brakes are released, the rotation of the flywheel is again transferred back to the rear wheel and aids the rider in resuming motion or accelerating the bicycle from a standstill.

FIG. 1 shows a schematic side view of a bicycle 01 having a regenerative braking system 20 according to the present invention. The regenerative braking system 20 includes a first double helical gear (also known as a herringbone gear) 14 mounted on a pedal axle 12 and a second double helical gear 10 mounted on a rear wheel axle 08. A shaft 16 is operatively coupled to the first double helical gear 14 and the second double helical gear 10 wherein the shaft 16 includes a third double helical gear 15 and a fourth double helical gear 11 at its two ends. The third double helical gear 15 is mounted on the shaft 16 at the end closer to the pedal axle 12 and the fourth double helical gear 11 is mounted at the end closer to the rear wheel axle 08.

Further, a first bearing 13 is mounted on the pedal axle 12 and a second bearing 09 is mounted on the rear wheel axle 08. The bearings 13, 09 prevent the rotation of the peddle axle 12 during braking.

A flywheel 17 is mounted on a frame 02 of the bicycle 01 wherein the flywheel 17 is operatively coupled to a sprocket on the rear wheel axle 08 through a drive member 18. The drive member 18 may be a chain drive or a belt drive. As the brakes are applied, the flywheel 17 continues to rotate and when the braking force is removed, the rotation of the flywheel 17 helps to increase the acceleration of the bicycle 01 and reduces the rider’s effort. The flywheel 17 used in the regenerative braking system 20 may be of a uniform thickness.

The rotational motion of the pedal axle 12 is transferred to first double helical gear 14 which is further transferred to the third double helical gear 15 and the shaft 16. The rotation of the shaft 16 is transferred to the fourth double helical gear 11 and further to the rear wheel axle 08 through the second double helical gear 10. The rotation of the rear wheel axle 08 is transferred to the flywheel 17 through the drive member 18 for harvesting.

The regenerative braking system 20 may further comprise means for generating electrical energy from the rotation of the flywheel 17 for example, a generator. Additionally, means for storing the electrical energy may also be included, for example a battery. Further, means for using the stored electrical energy may be included, for example, a motor.

The use of double helical gears 14, 10, 15, 11 and shaft 16 for transmission in the bicycle 01 with regenerative braking system 20 increases power transmission from the pedal axle 12 to the rear wheel axle 08, and thus increases the acceleration of the bicycle 01 for the amount of effort applied. Also, the torque effort by the rider is reduced. Further, the slipping factor in spur bevel gears or simple chain transmission is reduced. Additionally, there is no skipping of tooth or fall out of place during running. Also, as there is no axial thrust, simple bearings, for example, ball bearings or roller bearings may be used.

While the disclosure has been presented with respect to certain specific embodiments, it will be appreciated that many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the disclosure. It is intended, therefore, by the appended claims to cover all such modifications and changes as fall within the true spirit and scope of the disclosure.