A novel motorized mode of transportation

Now it is time to find the product. If you live in or close to a big city, you may find a dealer with a showroom. Check with local bicycle and scooter dealers to see of they carry what you are looking for.If you do not find anything locally, do not despair. The Internet is loaded with manufacturers of both kits and pre-built motorized bicycles.Wheel hub motors are similar to a normal bicycle hub with flanges including holes for spokes on each side and an axle through the center. However they are much larger in diameter and much heavier. When applied to the front wheel of a bicycle, they create a gyroscopic force that at high speeds makes the bicycle hard to steer and thereby dangerous in some conditions. When applied to either the front of rear wheel of the bicycle, wheel hub motors increase the polar moment of inertia significantly in both the vertical and horizontal planes. This is an undesirable characteristic from a handling and safety point of view.It is, therefore, desirable to provide a novel motorized mode of transportation that overcomes at least one of the disadvantages of prior art electric and/or motorized bicycles manufacturer .

It is, therefore, desirable to provide a novel motorized mode of transportation that overcomes at least one of the disadvantages of prior art electric and/or motorized bicycles. If you are satisfied with your selection, then it is time to buy and begin enjoying your motorized bicycle.It is an object of the present invention to obviate or mitigate at least one disadvantage of previous motorized or electric bicycles . Accordingly, the need exists for an electric powered bicycle that includes at least one of the following advantages. Firstly, one advantage is a simple, inexpensive multi-speed drive wheel that can be efficiently driven by a motor. Another advantage is a speed shifting apparatus that can be used to shift the multi-speed drive to increase torque multiplication as the bicycle begins to climb steeper hills such that when the hub shifts to larger reductions, the torque required from the motor to climb the hill is reduced and the efficiency increases. Another advantage of the invention is an increase in efficiency with a lighter bicycle. Another advantage of the invention is a drive arrangement that is independent of the bicycle drive where the rider can be assisted while pedaling at any speed or effort while the drive operates at an efficient range. Yet a further advantage is a low polar moment of inertia for the drive wheel so unassisted riding feels similar to a normal bicycle. Another advantage is a motor/drive unit and battery that can be retrofitted to an existing bicycle such that the battery can be in a position that is low and close to the center of the bicycle.

In a preferred embodiment, a brushless, direct current electric motor is used, but not installed to the wheel as the manufacturer intended. Instead, on a front drive embodiment, the motor is mounted to brackets that are, in turn, mounted to the fork of the electric bicycle manufacturer , just forward of the frame. A conventional chain can then be operatively connected around the sprocket(s) to drive the standard internally geared hub in the front wheel. The difference in the size of the sprockets can be adjusted to obtain the desired top speed of the bicycle, depending on the highest gear ratio of the multi-speed hub chosen.
 
 
source:townhall|motorized bicycles