| 摘要 |
A pump tappet (21) transmits a rotation movement of a cam shaft (12) provided with a cam (12a) to a pump plunger (13) as a reciprocation linear movement, and performs a reciprocation linear movement together with the pump plunger (13). The pump tappet (21) includes a shaft (22), a roller bearing (31) arranged on an outer diameter side of the shaft (22) and rotatably supported on the shaft (22), and a case (23) to house the shaft (22) and the roller bearing (31). The roller bearing (31) includes an outer ring (32) abutting on the cam (12a), a plurality of rollers (33) arranged between the outer ring (32) and the shaft (22), and a retainer (34) to retain the plurality of rollers (33). |
