Static pressure main shaft mechanism for coordinate grinding machine

The utility model discloses a static pressure main shaft mechanism for a coordinate grinding machine, which comprises a main shaft and a sleeve, the sleeve is sleeved on the main shaft, an oil film gap is arranged between the main shaft and the sleeve, the sleeve is fixedly arranged in a main shaft box, an oil inlet hole and an oil outlet hole are arranged on the sleeve, and the oil inlet hole and the oil outlet hole are both communicated with the oil film gap. The utility model has the beneficial effects that the high-precision coordinate grinding machine replaces the traditional rolling bearing and linear bearing, has the characteristics of high precision, good vibration absorption, no abrasion and small movement inertia, and is particularly suitable for a high-precision coordinate grinding machine; compared with a rolling bearing and linear bearing structure, the static pressure main shaft mechanism has no ball circulating rolling, so that the static pressure main shaft mechanism is completely free of vibr