Main shaft structure for high-speed milling

The utility model discloses a main shaft structure for high-speed milling, which comprises a connecting seat, a cavity is arranged in the connecting seat, a bearing is fixedly connected to one side in the connecting seat, a main shaft body is arranged on one side of the connecting seat, one end of the main shaft body sequentially penetrates through the connecting seat and the bearing and extends to the outside of the bearing, and the other end of the main shaft body is connected with the cavity. And the main shaft body is movably connected with the bearing. According to the main shaft structure for the high-speed milling, through the design of the heat absorption ring sleeve, the external water guide pipe, the partition plate, the heat dissipation fins and the box body, the device has a good heat dissipation function, heat generated by rotation between the main shaft and the connecting bearing can be rapidly conducted away, and the heat between the main shaft and the connecting bearing cannot continuously ris