To provide a crankshaft support structure in which a bearing part is disposed in a cast-molded crankcase to rotatably support a journal part of a crankshaft via a bearing and in which a bushing which supports an outer circumference of the bearing is integrally cast into the bearing part, the crankshaft support structure that can prevent concentration of stress around a bushing support hole, to thereby enhance durability of the bearing part against explosion load of an engine or the like.
A bushing 58 is supported from a direction along a rotation axis line of a crankshaft when a bushing 58 is cast. This allows bushing support holes 63A and 63B formed in a bearing part 55 to be disposed within a range having a width W along a radial direction of the bushing 58.
IMOTO YUTAKA
| JP2001082248A | 2001-03-27 | |||
| JP2001317535A | 2001-11-16 | |||
| JP2005090662A | 2005-04-07 | |||
| JP2012036934A | 2012-02-23 |
Kazuaki Niki
Nude Shima Shinji