Waterproof and dustproof structure on machine tool center

The ivnention discloses a waterproof and dustproof structure on a machine tool center. The waterproof and dustproof structure comprises a sleeve and an ejector pin which are of a rotary body structure, a rotary sleeve is fixedly arranged on the ejector pin, the sleeve is sleeved with the rotary sleeve, and a gap is formed between the inner wall of the rotary sleeve and the peripheral face of the sleeve. Relative movement exists between the rotary sleeve and the sleeve when the rotary sleeve rotates along with the ejector pin; a plurality of water blocking grooves distributed at intervals in the axial direction are formed in the peripheral face of the sleeve, a water guiding groove A is connected between the water blocking grooves, the water guiding groove A extends to the outer side of the position, covered with the rotary sleeve, of the sleeve, and therefore water on the water blocking grooves is guided out through the water guiding groove A. According to the waterproof and dustproof structure on the machine