Importance

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Abstract

A device for sealing V-belts and pulleys in plate jarring devices, in which a V-belt drive interconnects the drive motor and the unbalance oscillation generator fixedly connected to the bottom plate. The drive motor is in the advancing direction of the device offset relative to the oscillation generator and is arranged on the applied load cushioned relative to the ground plate. The device furthermore includes a protective housing which surrounds the pulleys and the V-belt and is closed on all sides with the exception of the passages for passing the motor shaft and unbalance shaft therethrough. The protective housing is firmly connected to the motor or to the applied load including the motor. The motor shaft passes in a dustproof manner through the passage provided therefor in the protective housing while a seal arranged stationarily is interposed between the motor shaft and the protective housing. The passage for the unbalance shaft has a radial oversize with regard to the unbalance shaft which oversize corresponds to at least the oscillation amplitude between the applied load and the bottom plate. The seal between the protective housing and the housing of the unbalance oscillation is established by means of a sealing ring which surrounds the unbalance shaft outside the passage in the protective housing. The sealing ring is firmly connected to the protective housing or to the housing of the oscillation generator and by means of its free end face facing away from one of said housings engages a plane annular sealing surface on the housing of the oscillation generator or engages the protective housing in each phase of the relative oscillation movement between said unbalance shaft and said protective housing.

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First Claim