Gantry gearbox spindle device

The utility model discloses a gantry gear box main shaft device, which comprises a fixed back plate and a clamping gear, the front end face of the fixed back plate is fixedly connected with a connecting shell, the front end face of the connecting shell is fixedly connected with a fixed rod I, and the inner part of the front end face of the fixed rod I is movably connected with a rolling ball; the front end face of the rolling ball is movably connected with a second fixing rod, and a positioning opening is formed in the outer side of the front end face of the second fixing rod. According to the gantry gearbox main shaft device, the fixing back plate can help to fix device parts and increase the installation stability of the device parts in a gearbox, the first fixing rod and the second fixing rod roll mutually, the rotation effect of a main shaft can be improved, the gearbox can keep high-speed rotation conveniently, and the positioning opening can be used for being clamped with the concave opening. In the usi