| 摘要 |
A timing driving device is provided to improve noise, vibration and harshness performance by restraining an end of an injection pump shaft. A timing driving device comprises first and second sprockets(20a,20b) and an injection pump shaft(10). The first and second sprockets are connected with a crank shaft sprocket and a cam shaft sprocket through chains, respectively. The injection pump shaft is coupled with the first and second sprockets through a shaft. A chain cover(30) surrounds the first and second sprockets to protect the first and second sprockets. An end portion of the injection pump shaft is coupled with the chain cover to prevent resonance from occurring when the injection pump shaft rotates. The chain cover is formed with a bearing hole(31). A vibration blocking bearing(40) is inserted into the bearing hole and the end portion of the injection pump shaft is coupled with the vibration blocking bearing.
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