| 摘要 |
PURPOSE: To simplify and reduce weight of a driving force transmission system and its related structure for installation of additional one to multiple hydraulic pumps and, even when one to multiple hydraulic pumps are installed additionally, reduce the size of them without increasing the axial length of a pump unit. CONSTITUTION: As a driving force take-out mechanism 40 in order to take out a driving force from the spline sleeve member 31 of a spline joint 30 as an intermediate joint part of a tandem swash plate type hydraulic pump 1, a first gear 41 connected to the spline sleeve member 31 and a gear box 50 are installed. Also the gear box 50 comprises a counter gear 53, a driven gear 56, a spline sleeve member 57, and a gear case 51 in which these members are stored rotatably. Then the gear box 50 is fixed detachably to an intermediate block 8, and pump mounting parts 59a and 59b for mounting additional hydraulic pumps 60 and 61 to be provided occasionally are installed on both surfaces of the gear case 51. |
