desidin idea for better bike

grabcad

Design idea is based on adjusting the actuator arm of pedal bike Advantages: Bike Gear Removal System Simple and cheaper plan compare to transmission system disadvantages: Changing distance from saddle to pedal slightly Basic concept: Since starting up or moving on slopes greater torque needed, for comfortable divining, gear status changed, Using smaller gear on driving side and bigger diameter gear on consumer (back) side.and on uphill road or high speed driving changes gears in reverse au act. The proposed design of an actuator arm that is adjustable in length to be used, Thus the larger the actuator arm to start moving and at higher speeds, shorter arm is used (adjusted) . And actually implement the system we do not need gear changing system. The proposed size of the arm: 18 cm in the greatest state and 12 cm in the smallest state, The advantage of the design theory is presented with an example: Assuming the drive gear wheel diameter is 18 cm and consumer gear(rear gear ) diameter is 7.5 cm and diameter of bike wheels are 62 cm (same as one of the real situation) With linear motion of pedal driving distance about 100.48 cm (one cycle) with use of long driving arm (18 cm) , the bike move about 194.68 cm , but if we use from sort arm (12 cm) with same linear motion of petal driving distance 100.48 cm ( 1.33 cycle) , the bike move about 259.57 cm. If we assume a linear velocity of pedal motion in both cases is the same ,33% increase in speed will be the same terms. Mechanisms may be implemented as below: 1-The actuator arm bikini with Swing Motion 2-The actuator arm bikini with Slid Motion 3- one arm but with capability of sliding related to center of bike wheel