| 摘要 |
The invention relates to a combined screw and belt gear comprising a driven rotatable screw 3 and a nut 5 running along the screw 3. The nut 5 drives a first belt 9 to which it is connected. This belt 9 is stretched between a first and a second belt pulley 10, 11 and intended to drive these. The belt 9 is in this connection intended to be rolled onto a groove on one belt pulley and at the same time unrolled from a groove on the other belt pulley. Each belt pulley 10, 11 is provided with a further groove for receiving a second belt 12 running parallel to said first belt 9 but arranged running in an opposite manner to the latter so that the second belt 12 is unrolled from a belt pulley at the same time as the first belt is rolled onto the same belt pulley, and one of the belt pulleys is fixed on a rotatable output shaft 24. <IMAGE> |
