Sealing transmission mechanism for machine tool headstock

The utility model discloses a sealing transmission mechanism for a machine tool headstock, which comprises a machine tool spindle, a sealing transmission mechanism is arranged on the machine tool spindle, and a magnetic encoder is connected with the sealing transmission mechanism. The sealing transmission structure comprises a bearing gland, the outer diameter of the bearing gland is sleeved with a fixing ring, and an inductive head is arranged on one side of the fixing ring. A magnetic circular ring is fixedly arranged on one side of the bearing gland, and the outer diameter of the magnetic circular ring corresponds to the inductive head gap; a boss part is arranged on one side of the bearing gland, and step parts are arranged on the outer diameter of the bearing gland and the inner diameter of the fixing ring respectively. The magnetic circular ring and the bearing gland are assembled together and synchronously rotate along with a machine tool spindle; the inductive head and the fixing plate are assembled t