| 摘要 |
<p>A travelling crab (1), arranged to run in guidance by a guiding rail (2) for transporting a load connected to the travelling crab. Said guiding rail (2) comprises two rolling surfaces (3, 4) facing away from each other, located on sides pf the guiding rail facing away from each other. The travelling crab comprises a body (5); a first wheel (6) and a second wheel (7), both rotatably carried on the body, their axes of rotation (8, 9) parallel and spaced from each other. The wheels are disposed on different sides of the guiding rail with the guiding rail between the wheels and the wheels in traction contact with the rolling surfaces substantially in register on different sides of the guiding rail. A traction motor (10, 11) is connected to the body and disposed to drive the wheel. The body (5) comprises a first body part (51), to which the first wheel (6) is connected, and a second body part (52), to which the second wheel (7) is connected. The first body part (51) and the second body part (52) are swivellably joined to each other with a hinge (12), the axis of rotation defined by this hinge parallelling the axes of rotation (8, 9) of the wheels and located between the axes of rotation of the wheels at a distance (1) from the plane (T) passing through said axes of rotation. A spring means (13) is connected between the first body part (51) and the second body part (52) for swivelling the body parts around the axis of rotation of the hinge (12) in order to elastically urge the wheels (6, 7) against the guiding rail.</p> |
