| 摘要 |
<p>Rotor (18) of electric motor (12) is positively coupled to hollow shaft (11) and threaded part (24) which engages spindle (10) for conversion of rotation of rotor into reciprocal motion of spindle.Hollow shaft is of constant inner diameter (28) which, together with spindle diameter, are matched so that spindle fits into hollow shaft and is guided in it. Preferably spindle lead (27) and diameter are matched in specified manner.</p> |
