Oil pan device

Abstract

An oil pan device (1) is provided with an oil pan (10) that is attached to a lower end (5a) of a crankcase (5) of an engine, and a drain bolt (50). The oil pan (10) includes a recessed portion (33) formed by recessing a bottom surface portion (32) upward, an inclined portion (35) that sections the recessed portion (33), and a bolt hole (36) that is provided in the inclined portion (35), and when the drain bolt (50) is attached to the bolt hole (36), a head portion (52) of the drain bolt (50) is accommodated in the recessed portion (33).

1 . An oil pan device comprising:
 an oil pan that is attached to a lower end of a crankcase of an engine; and   a drain bolt,   wherein the oil pan includes:
 a recessed portion formed by recessing upwardly a bottom surface portion; 
 an inclined portion that sections the recessed portion; and 
 a bolt hole that is provided in the inclined portion, and 
   when the drain bolt is attached to the bolt hole, a head portion of the drain bolt is accommodated in the recessed portion.   
     
     
         2 . The oil pan device according to  claim 1 , wherein
 a top portion of the recessed portion is arranged at a position higher than an attachment surface of the oil pan with the crankcase.   
     
     
         3 . The oil pan device according to  claim 1 , wherein
 the recessed portion is formed in a reversed V shape in a cross-sectional view.   
     
     
         4 . The oil pan device according to  claim 2 , wherein
 the recessed portion is formed in a reversed V shape in a cross-sectional view.