| 摘要 |
PROBLEM TO BE SOLVED: To provide a rocker arm enabling an increase in size to be avoided. SOLUTION: This rocker arm 50 is swingably supported on a cylinder head through a rocker arm shaft 51 extending through the support hole 52 of a fulcrum part 50A. A roller storage space S is formed by extending a pair of roller support parts 54A, 54B from the fulcrum part 50A. A roller 55 swung by a camshaft is disposed in the roller storage space S. A roller shaft 56 rotatably supporting the roller 55 is fixedly installed between the roller support parts 54A, 54B. The rocker arm comprises a valve contact part for opening and closing an intake valve or an exhaust valve by coming into contact therewith. A rocker arm shaft bearing part for supporting the rocker arm shaft 51 is formed by press-fitting a shell type needle bearing 53 having a shell 53B on the outer peripheries of needles 53A into the support hole 52. The rocker arm shaft bearing part is cut from the roller storage space S toward the support hole 52. COPYRIGHT: (C)2011,JPO&INPIT
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