| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To raise a meshing rate of a gear train by setting the form of a meshing line in various shapes so that a long meshing line is secured in a limited meshing area. <P>SOLUTION: In the gear structuring the gear train, a meshing line Tr of an inner gear 11 and an outer gear 21 of a reclining device 4 provided while meshing with each other in a manner capable of transmitting power is formed as a circular arc curve crossing a curve (an effective addendum circle 21h) extending from on a curve (an effective addendum circle 11h) positioned at radially inside to a circumferential direction of a side where an interval between these two curves becomes wide and positioned at radially outside. The two curves (the effective addendum circle 11h of the inner gear 11 and the effective addendum circle 21h of the outer gear 21) determine the meshing area Ge. A center point To of the circular arc of the meshing line Tr is set to be positioned off a reference straight line straightly extending through a pitch point P where both the pitch circles 11p, 21p of both the gears 11, 12 contact and center points 11r, 21r of the respective pitch circles 11p, 21p. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
