FIELD: transport.
SUBSTANCE: invention relates to bicycles with pedal drive crank mechanisms that comprises levers of self-adjusting length that run along elliptic trajectory or other noncircular rotational trajectory. Pedal drive with chain or belt transmission comprises pinion frame 1 with its first end coupled with shaft of carriage 2, lever 3 with pedal 4 rigidly fixed with sun gear 5, stationary gear 6 with gear ratio of 2:1 with respect to sun gear 5. Stationary gear 6 is fixed relative to bicycle and coupled with sun gear 5 by chain or belt transmission. Second end of pinion frame 2 is articulated with sun gear 5 at the point shifted from its center while stationary wheel 6 features shape other than circle.
EFFECT: reduced drive forces due to mismatch between passing top dead center and bottom dead center of pedals.
4 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PEDAL DRIVE (VERSIONS) | 2016 |
|
RU2651314C1 |
| PEDAL DRIVE | 1992 |
|
RU2068364C1 |
| PEDAL DRIVE | 2011 |
|
RU2493999C2 |
| BICYCLE WHEEL DRIVE | 2015 |
|
RU2622734C2 |
| SCOOTER | 2002 |
|
RU2228279C2 |
| PEDAL DRIVE CARRIAGE UNIT | 0 |
|
SU1320118A1 |
| GATE-LEVER RECTILINEAR-GUIDING MECHANISM OF INCREASED ACCURACY AND DRIVER FOR WHEELED VEHICLES DRIVEN BY MUSCULAR POWER OF A PERSON | 2017 |
|
RU2664852C1 |
| VEHICLE MUSCULAR DRIVE | 2013 |
|
RU2521469C1 |
| ELECTRIC CAR VARIABLE-SPEED DRIVE UNIT | 1998 |
|
RU2175415C2 |
| LIGHT VELOMOBILE PROPELLED BY MUSCULAR FORCE OF FEET, BACK, HANDS AND WEIGHT OF DRIVER AND LOAD | 1996 |
|
RU2124450C1 |
