Six-degree-of-freedom double-probe gear measuring device following Abbe principle

The invention discloses a six-degree-of-freedom double-measuring-head gear measuring device following the Abbe principle, and belongs to the field of precision testing technologies and instruments and gear non-contact measurement. The measuring device comprises a rack unit, a Y-axis moving unit, a Z-axis moving unit, a double-measuring-head measuring unit and a C-axis rotating and fixing unit. Key components are measured in parallel in a symmetrical distribution mode, the left and right tooth surfaces of a gear are measured synchronously, rotation of double measuring heads can achieve the purpose that the angles of the measuring heads can be adjusted only by moving a guide rail multiple times in traditional measurement, and Z-axis moving units are installed on the two sides of a Y-axis moving unit and used for adjusting the positions of the double measuring heads in the tooth width direction. And meanwhile, the grating scales are coaxially mounted on the horizontal extension lines of the centers of the nut se