| 摘要 |
A RETREAT RESTRICTING MEMBER (5) FOR RESTRICTING THE RETREAT OF A PINION (4) IN AN ADVANCED STATE OF THE PINION ON AN OUTPUT SHAFT (3) AND IN A RESULTING MESHED STATE OF A PINION GEAR (4A) WITH A RING GEAR (100) IS ENGAGED WITH A PAIR OF PINS (37) ROTATABLY, THE PINS BEING EACH ATTACHED TO A THRUST RING (36). IN A ROTATION MEMBER (6) FOR RESTRICTING THE ROTATION OF THE PINION, UPON MESHING OF THE PINION GEAR WITH THE RING GEAR, THE FRONT END OF A ROTATION RESTRICTING BAR (6B) IS DISENGAGED FROM A RECESS (34A) OF A ROTATION RESTRICTING PLATE (34) AND FALLS TO THE REAR END SIDE OF THE THRUST RING, THEREBY RELEASING THE ROTATION-RESTRICTED STATE OF THE PINION. FURTHER, ENGAGING PORTIONS (6A) OF THE ROTATION RESTRICTING MEMBER COME INTO ENGAGEMENT WITH ENGAGING RECESSES (5D) OF THE RETREAT RESTRICTING MEMBER TO HOLD THE POSTURE OF THE MEMBER, THEREBY INHIBITING THE RETREAT OF THE PINION.(FIG. 2) |
