| 摘要 |
<p>An earth-working machine described has a first internal gear (33) fixedly mounted on a mobile chassis (10), a turntable (14) coaxially rotatably mounted on the first internal gear (33), a carriage (20) rotatably mounted on the turntable (14) in eccentric relation thereto and having a second internal gear (39), an earth-working mechanism (48) mounted on the carriage (20), a first hydraulic motor (18) mounted on the turntable (14) and having a first pinion (37) held in driving mesh with the first internal gear (33) for rotating the turntable (14) about its own axis, a second hydraulic motor (41) mounted on the turntable (14) and having a second pinion (43) held in driving mesh with the second internal gear (39) for rotating the carriage (20) about its own axis, and hydraulic driving means (Figure 9) for actuating the first and second hydraulic motors (18, 41) independently or in synchronism. The hydraulic driving means may be controlled by an electric control system supplied with signals from angle detectors such as rotary encoders for detecting angular displacements of the turntable and the carriage.</p> |
