| 摘要 |
<p>The invention relates to a device for operating a track tension wheel on a tracked vehicle. The device comprises two operating cylinders, a pivoting cylinder (38, 48) for pivoting a tension wheel arm (10) that carries a tension wheel, and a tensioning cylinder (28, 30) for changing the distance between the centre (25) of the tension wheel and the centre of rotation (12) of the tension wheel arm. The tensioning cylinder (28, 30) is connected to a pivoting link arm (36) in such a way that it can pivot, which link arm is arranged to be stationary in a first phase of a pivoting upward movement of the tension wheel ann (10) from a lowered position and to pivot around its connection to the link ann (36). In a second phase of the upward pivoting movement, a lug (50) on the tension wheel arm (10) is arranged to engage with the link arm (36) to cause the tensioning cylinder (28, 30) to be pivoted around the connection of the link arm (36) to the fixing (18) during a continued upward pivoting movement of the tension wheel arm (10).</p> |
