Clamping device for automatically grabbing sample cup

The utility model discloses a clamping device for automatically grabbing a sample cup, which comprises a transfer plate, a clamping device and a clamping device, the positioning plate is positioned below the transfer plate and is used for supporting the sample cup; the clamping jaws are connected with the transfer plate in a sliding mode and symmetrically arranged on the two sides of the containing hole; two ends of the return spring are respectively connected with the transfer plate and the clamping jaw; the driving assembly comprises a lifting arm and a swinging arm, and each swinging arm is of an L-shaped structure composed of a vertical section and an inwards-bent section; when the lifting arm moves downwards along the inner bent section of the swinging arm, the clamping jaws overcome the pulling force of the return spring to move oppositely and clamp the sample cup; and when the lifting arm moves upwards from the inner bent section to the vertical section, the clamping jaw moves back to back to leave the