| 摘要 |
PURPOSE:To eliminate an early abrasion while preventing a noise from occurring, by fitting an auxiliary gear in a boss of one side gear with some play free of movement in a between-shaft direction, while pressing the auxiliary gear to the side of a gear having the boss under pressure by means of a spring. CONSTITUTION:Each of auxiliary gears 20 and 21, being thinner than reduction gears 7 and 8, is fitted in each of bosses 7a and 8a of these reduction gears 7 and 8 locked to each shaft end of crankshafts 5 and 6 with some play, while these auxiliary gears 20 and 21 are pressed toward the side of these reduction gears 7 and 8 by means of belleville springs 22 and 23. With this constitution, only these auxiliary gears 20 and 21 are engaged with each other so as to cause their teeth clearances to become zero with the other gears, and under this condition, power transmission for a pair of gears themselves is performable so that sun highly accurate power transmission as having no early abrasion in gears is performable while preventing a noise based on backlash from occurring. |
