| 摘要 |
PURPOSE: To decrease the dimensions of the axial direction of a device by changing the synthetic value of respective eccentricity by changing a relative angle of a plurality of eccentric cams conveying synchronous rotation, steplessly adjusting the stroke of a reciprocating pump, and forming one of the eccentric cams as one part of Oldham's couplings. CONSTITUTION: A main spindle 3 is driven through a coupling 2 by a prime motor 1 and a crank shaft 7 is driven through respective gears 5, 6. The crank shaft 7 forms a first eccentric cam 8 with an eccentricity e1 and the first eccentric cam 8 supports the second eccentric cam 9 with an eccentricity e2. A reciprocating pump 15 is driven through a plunger 13 by a connecting rod 11 supporting the second eccentric cam 9 with a annular bearing 10. An adjusting device 16 which can be damped is attached onto an intermediate gear 17 where a differential gear equipped with a plurality of bevel gears 18 to 20 are placed. A reduction gear device 27 with a plurality of spur gears 28 to 31 and reduction ratio of 2:1 is disposed between the bevel gear 20 and an output shaft 25. |
