| 摘要 |
<p>The gearwheels (4) are fitted inside a housing (5), whereby the housing inner wall (6), at least in areas, is formed as a toothed bar. On the cage (7) a gearwheel shaft (4a) is static and a further such shaft (4) is displaceably arranged in the tractive and thrust direction. The guide of the displaceable gearwheel shaft (3) occurs in a long hole, slot (8) or similar, and in the movement path of the gearwheel shaft (3) at least one stop cam (13) is provided which can be overcome by increased tractive or thrust force. The housing (5) and/or the gearwheels are of plastic and the telescopic bar (2) preferably is of light metal.</p> |
