| 摘要 |
PCT No. PCT/SE86/00248 Sec. 371 Date Jun. 12, 1987 Sec. 102(e) Date Jun. 12, 1987 PCT Filed May 30, 1986 PCT Pub. No. WO86/07041 PCT Pub. Date Dec. 4, 1986.A screw lift comprises a lift car (2) which is movably supported on an upright fixed screw (4) and carries a nut (54) in engagement with the screw and a belt drive for rotating the nut on the screw and thereby driving of the lift car along the screw. The nut (54) is rotatably journalled in a lubrication and bearing housing (62), which is connected with the lift car (2) and out of which it extends with a portion, that widens essentially conically and carries a belt pulley (56) with a correspondingly conically shaped hole. The belt pulley and the nut are mutually somewhat axially shiftable. A pulse transmitter (130,132) is arranged as the only position, direction and velocity determining device for the lift for sensing the position of the nut on the screw and emitting signals corresponding thereto. |
