GB1397173A - Rotary vibrator and mount therefor - Google Patents

Abstract

1397173 Vibrators C G MATSON 22 May 1973 [13 Oct 1972] 24404/73 Heading F2X A rotary vibrator is interfitted with a mounting structure, the vibrator casing and the mounting structure having co-operative cam surfaces adapted to continuously tighten as a result of the migratory rotative movement of the vibrator ensuing from the continuing driving force applied to the vibrator rotor, thus providing a simple automatic clamping of the vibrator to the mounting structure. The invention is described with reference to a vibrator similar to that forming the subject-matter of Specification 1,094,466 and comprising a casing 10 having an interior circular track 12 within which a rotor 14 is confined by the track and by a pair of side plates (not shown). The track has an annular groove 20 to which compressed air is supplied via a tangential port 22 and an inlet 24. The side plates have annular grooves 28 provided with exhaust outlets 30. One or more mounts typified by the mounting structure 34 are affixed to the article 32 to be vibrated, e.g. a concrete mould, as by welding at 36. The structure 34 includes a tube 38 so shaped and dimensioned that the casing 10 fits initially relatively loosely within it. The tube 38 in cross-section takes the form of a 3-lobed cam with three high spots 40 and three low spots 42. The exterior of the casing 10 has three co-operating ram surfaces formed by lugs 46 welded to the casing. When the vibrator is started and after the user has given the casing a slight counterclockwise turn by means of a handle (not shown), the precessive or migratory movement of the casing causes the co-operative cam surfaces to continuously tighten, the resultant wedging or tightening action being maintained so long as driving force is applied to the vibrator. Where several tubular mounts are provided, one vibrator may be easily and simply moved from one mount to the other.