| 摘要 |
<p>PURPOSE:To restrain the fluctuation of torque in a drive shaft by making a pair of those parts identical in mass which are located symmetrically with respect to a shaft center out of the reciprocating parts consisting of a piston and a connecting rod and making said pair of parts different in mass from the other paired-up parts. CONSTITUTION:When a main shaft 13 of a compressor is driven, both a drive plate 14 and a swash plate 12 are rotated, and a piston support 21 is thereby rocked. As a result, each piston 31 is reciprocated within each cylinder 33 via each connecting rod 32, therefore, cooling medium is sucked in each cylinder 33 so as to be discharged into a discharge chamber 9 after having been compressed. In this case, each cylinder 33 is arranged symmetrically with respect to a shaft center. And a pair of those parts which are located symmetrically with respect to the shaft center out of reciprocating parts consisting of the connecting rod 32 and the piston 31, is made identical in mass each other, while being made different in mass from the other paired-up parts. Owing to this constitution, the fluctuation of torque which is reversed in phase against the fluctuation of torque generated in the main shaft 13, is produced.</p> |
