| 摘要 |
Disclosed is a four-in pump which includes: a gear box ( 21 ) being arranged between a first and a second cylinder blocks ( 100 and 200 ), a gearing means ( 1 ) arranged within the gearbox ( 21 ) being connected with a driving shaft ( 13 ) of a motor ( 11 ), four eccentric shafts ES 1 through ES 4 being mounted for possibly performing eccentric rotational motion, on the gearing means ( 1 ), respectively, four pistons ( 120, 160, 220, 260 ) respectively mounted on the eccentric shafts ES 1 through ES 4 being arranged on an upper and a lower volume chambers ( 110 and 150 ) of the first cylinder block ( 100 ) and on an upper and a lower volume chambers ( 210 and 250 ) of the second cylinder block ( 200 ), respectively.
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