Abstract: A device provides selective modes of vibrational oscillations and centrifugal rotations for preparing analysis samples. The device includes a base, an elastic connection body, a group of a synchronous unidirectional bearing inner ring and a synchronous unidirectional bearing outer ring, a group of an eccentric unidirectional bearing inner ring and an eccentric unidirectional bearing outer ring, and a synchronous fixed ring and a motor on the base. The eccentric unidirectional bearing outer ring is connected to a sample plate for holding the analysis samples.

Abstract: The invention discloses an analytical sample preparation device and an analytical sample preparation method, which comprises a base (1), an elastic connection body (5), a group of a synchronous unidirectional bearing inner ring (41) and a synchronous unidirectional bearing outer ring (42), a group of an eccentric unidirectional bearing inner ring (61) and an eccentric unidirectional bearing outer ring (62), and a synchronous fixed ring (2) and a motor (31) on the base (1). The eccentric unidirectional bearing inner ring (61) is connected with an eccentric shaft (32) extending from a motor (31). The eccentric unidirectional bearing outer ring (62) is fixed to an eccentric shaft sleeve (9). The eccentric shaft sleeve (9), the eccentric shaft (32), the eccentric unidirectional bearing inner ring (61), and the eccentric unidirectional bearing outer ring (62) have their center of mass disposed on a line extending from the center line of the motor (31).