| 摘要 |
<p>On the invented four-wheeled small tractor frame /1/ there are fastened spring-loaded swing arms /6, 7/ that are in turn attached to swinging hydraulic cylinders /2, 3/ serving for swinging the swing arms /8, 9/. In the center of said swing arms /8, 9/ there are rotatably mounted shafts /12, 13/, which are coupled by their first ends with a gear box /20/ output shaft /18, 19/ while the other ends thereof are fixedly coupled with toothed wheels /21, 22/. Said toothed wheels /21, 22/ communicate with toothed wheels /23, 24/, which are coupled with splined shafts /25, 26/ on which there are slidably mounted ground wheels /27, 28/. Said ground wheels /27, 28/ disks are provided with fixedly fastened nuts /31, 32/ through which pass motion screws /29, 30/ that are operable by means of a hand crank /35/. An actuator /36/ is controllable by a remote control /37/ through the mediation of picture cameras /38, 39, 10/ and monitors /41, 42, 43/.</p> |
