| 摘要 |
<p>The device (10) has a driven front axle (14) with two wheels (13) and two rear wheels (15) and can be attached to the trailer (11) with a ball joint connection (18, 19, 20, 21). A steering bar (17, 24) with a handle (30) provided with a control unit (35) at one end (29) is joined with its opposite end (28) to a horizontal axle(26) located on top of a swivel bearing (23) for moving the front wheels (13) around a vertical axle. The unit (10) is driven by a battery (33) operated electric drive accommodated inside a housing positioned behind the rear wheels (15).</p> |
