| 摘要 |
PURPOSE:To improve equally distributing rate of load between respective planetary gears and increase the load capacity of said reduction gear by a method wherein the thickness of a rim is designed so that a ratio between the thickness of rim of an internal teeth in the planetary reduction gear for the titled starter and the depth of the internal gear is within a specified range. CONSTITUTION:The titled starter transmits a torque to an output rotary shaft 8 by a method wherein a sun gear 3 in the planetary reduction gear is rotated by the rotation of the shaft 7 of a prime mover and whereby a plurality of planetary gears 2 are rotated in the fixed internal gear 1 under being revolved. When a pinion 15 is moved into the axial direction thereof by the operation of a magnet switch 9 through a shift lever 10 or the like and engaged with a ring gear (not shown in the diagram), cranking of the engine is effected. In this case, the thickness of the rim of the internal gear 1 is designed so as to be H/a<=0.8, in which (h) means the thickness of the rim of internal gear 1 and (a) means the depth of the gear. According to this method, the equally distributing rate of load between respective planetary gears 2 may be improved and the load may be equalized. |
