Oscillating displacement vacuum pump

摘要

The pump has a drive unit driving a shaft. A transmitting device transmits rotating motion of the shaft into oscillating movement of parts of a conveying pump that conveys gas or vapors. The device has a bearing (7) with an inner ring (10) and an outer ring (11) that is pivoted at the inner ring. The inner ring is attached to the shaft in a torque-proof manner. The inner ring is self-eccentric such that a circular outer bearing surface (14) of the inner ring is arranged eccentric to a middle axis of the shaft, where the bearing surface bears the outer ring.