| 摘要 |
<p>The invention concerns a continously variable hydrostatic power-split transmission with at least two operating ranges between which it is switched by shift elements, with a first, mechanical, part (II) which includes a planetary differential gear (13) and with a second, hydrolastic, part (I) which includes two power-linked adjustable hydraulic units (H1, H2) which can be operated in both directions either as a pump or as a motor and which are coupled to the mechanical part (II). The ring gear (19) used to control the direction and speed of rotation of the gear box output shaft (12) in the individual operating ranges is coupled to a first hydraulic unit (H1). In the first operating range, the second hydraulic unit (H2) drives through a gear-shift element (K1, K2) to the output shaft (12). The first hydraulic unit (H1), which is coupled to the ring gear (19), works as a pump while the second (H2) works as a motor. The two hydraulic units (H1, H2) are designed as inclined-axis units. Their respective input and output shafts (27, 41) are parallel to each other. The invention is characterized in that both hydraulic units (H1, H2) are mounted inside the gearbox casing and next to each other so that their respective input and output shafts (27, 41) are oriented in opposite directions and staggered by at the most the length of a hydraulic unit (H1, H2) with respect to each other in the direction of the axes of symmetry of the hydraulic-unit input and output shafts of the hydraulic units (H1, H2) and the axes of the cylinders of the hydraulic units lie in the same plane and at least one additional spur-gear stage is fitted between the planetary differential gear (13) and the second hydraulic unit (H2).</p> |
