| 摘要 |
<p>A lash-adjuster (10) is interposed between an exhaust valve (12) and a cam (14). The lash-adjuster (10) has a bucket (22), a plunger (24), a first elastic body (26), and rolling elements (28). The bucket (22) has an external wall portion (220) and a ceiling portion (221) and is formed substantially into a hollow cylinder which is closed at an upper end thereof. The plunger (24) is brought into abutment with an upper end of the exhaust valve (12) and vertically movably disposed in the bucket (22), and has an upper guide (32) and a lower guide (34). A tapered portion is formed around the outer circumference of the lower guide (34) in such a manner that the diameter thereof is reduced toward an upper end thereof. The first elastic body (26) is brought into abutment with an internal surface of the ceiling portion (221) of the bucket (22) at an upper end thereof and with the lower guide (34) at a lower end thereof, and is disposed in a state in which it is compressed in advance. A plurality of rolling elements (28) are disposed at the tapered portion.</p> |
