| 摘要 |
A clearance compensating mechanism in reciprocating driving linkages, especially for valve drives of internal combustion engines. The mechanism is provided with a piston in front of an oil-filled pressure chamber, which piston moves into a cylinder in a downward direction, thus leaving an annular gap so as to permit a passage for minor oil leakage. The pressure chamber is in communication with a reservoir, which also contains oil, by means of a passage having a relief valve with a valve body held by, for example, a cage and adjoining the pressure chamber below an inlet point in the annular gap. A compression spring can be provided for pretensioning the piston along the lines of its movement out of the cylinder.
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