| 摘要 |
A device for automatically locking wheels on a balancing machine which comprises: a rotating hollow shaft which supports, at one end, a flange for clamping a wheel in a cantilevered fashion; a secondary shaft which can perform a translatory motion within said hollow shaft by means of preloaded springs, so as to keep the secondary shaft shifted away from the clamping flange, thus locking the wheel; a pneumatic cylinder for the translatory motion of the secondary shaft towards the clamping flange, in order to allow the release of the wheel and, simultaneously, a further loading of the springs. For machines of this kind, the locking device according to the present invention has at least two gas springs which are parallel to the secondary shaft and are interposed between a pulley rigidly coupled to the hollow shaft and the free end of the secondary shaft, and a pneumatic cylinde with a stem which acts on the end of the secondary shaft which can preload the gas springs to allow the translatory motion of the secondary shaft towards the clamping flange and therefore allow wheel release. There are also provided stops for stopping the stroke of the secondary shaft and elastic elements for returning the secondary shaft and the stem of the piston to the initial position, thus allowing the gas springs to restore the locking of the wheel.
|
