| 摘要 |
PURPOSE:To reduce both size and weight of the captioned generator by dividing an eccentric crank part on the crank shaft into two parts on the crank shaft together with incorporating the intermediate parts of both eccentric crank parts into the cylinder chamber. CONSTITUTION:A crank shaft 42 is driven by an electric motor 1 for speed reduction via an epicyclic gear system 57. This crank shaft 42 is provided with eccentric crank parts 58 and 59, which are divided into two parts with the axial direction. In addition, this crank shaft 42 is inserted into a lateral hole of a working cylinder 45, while the intermediate parts of both eccentric crank parts 58 and 59 are incorporated into a cylinder chamber 52 in such a manner that the side faces of the eccentric crank parts 58 and 59, which face to each other, become a part of the inner cylinder wall of the working cylinder 45 individually. On the other hand, this working cylinder 45 accommodates a plunger 44, which is pivotally supported by a gudgeon pin 46, in such a manner that the plunger 44 can goes into or out of the cylinder 45.
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