| 摘要 |
<p>PROBLEM TO BE SOLVED: To circulate lubricating oil in a gear box and each driving part case by arranging a driving part case in which an inner capacity of a cross head is changed in association with reciprocating motion of the cross head on a pump driving part. SOLUTION: Lubricating oil O in a gear box case 4 is sucked in a driving part case 20 through an oil circulating part 30 of a light side surface 20a of a first series of the driving part case 20 by moving a first series of cross head forward. Lubricating oil O in the first series of the driving part case 20 is delivered to a second series of the driving part case 20 through an oil circulating part 30 of a right side surface 20b of the driving part case 20 by moving the cross head backward. The sucking operation of the lubricating oil O and the delivering operation (a pumping operation) are carried out in the same way in second and third series of the driving part case 20. Since a phase of a reciprocating motion of the cross head in each pump driving part 3 is connected in a slid off state, the pumping operation of the lubricating oil O is continuously carried out.</p> |
