| 摘要 |
A chain tensioner (20) includes a housing (21) formed with a cylinder chamber (22) in which a plunger (23) is slidably mounted. A return spring (30), also mounted in the cylinder chamber (22), biases the plunger (23) outwardly of the cylinder chamber (22). The housing (21) is formed with an oil supply passage (33) communicating with a pressure chamber (32) defined in the cylinder chamber (22) by the plunger (23). A check valve (34) is provided at the outlet of the oil supply passage (33). An oil filter (39) is mounted in the inlet of the oil supply passage (33). The oil filter (39) removes foreign objects contained in hydraulic oil supplied into the oil supply passage (33), thereby preventing malfunction of the chain tensioner due to foreign objects getting stuck in moving parts of the chain tensioner. |
