| 摘要 |
1. Switches for terminating the displacement of a crankshaft (9) during the balance centring in a balance centring machine, which has a bearing bed and a rocking bridge (1, 2) which is supported thereon via springs and in which the crankshaft (9) to be balance-centred rotates about the axis (22) of the balance centring machine and in which the crankshaft axis is displaceable in relation to the axis (22) of the balance centring machine up to a minimum radius of rotation (re ) of a point of the surface of each of two selected crankshaft bearings rotating about the axis of the balance centring machine, which switches comprise sensors (3, 4) for the contactless measurement of the minimum radius of rotation (re ), characterised in that the sensors comprise two transmitters (3) for sharply concentrated light (29), which are disposed on the rocking bridge (1, 2) and each of which transmits a beam of light (29) to receivers (4) which are situated opposite them and which are likewise disposed on the rocking bridge (1, 2), and that the beams of light (29) cross, the axis (22) of the balance centring machine in the region of a crankshaft bearing in each case, at the distance of the minimum radius (re ), and that on the first reception of light by a receiver (4), a switching-off pulse is produced via a crankshaft bearing in order to terminate the displacement of the crankshaft axis. |
