Cnc dual-spindle transmission device

A computer numerical control (CNC) dual-spindle transmission device, which is installed on a CNC dual-spindle machining center in such a way that a first spindle and a second spindle of the CNC dual-spindle machining center are mounted thereto, the CNC dual-spindle machining center further comprising a base, a machining table movably mounted on the base, and a vertical column erected upright in an up-down direction at a rear portion of the base, the CNC dual-spindle transmission device comprising:

• a linear rail assembly, which is mounted to the vertical column and comprises two linear rails that extend in the up-down direction and are parallel with and spaced from each other in a left-right direction;
• a first slide seat, which is slidably mounted to the linear rail assembly to receive the first spindle to mount thereto and comprises a first right slide block assembly and a first left slide block assembly respectively in slidable engagement with the linear rails and each comprising a plurality of first slide blocks;
• a second slide seat, which extends in the left-right direction across the first slide seat and is slidably mounted to the linear rail assembly in a manner of being spaced from the first slide seat to receive the second spindle to mount thereto and comprises a second right slide block assembly and a second left slide block assembly respectively in slidable engagement with the linear rails and each comprising a plurality of second slide blocks;
• a first power unit, which is mounted to the vertical column to drive the first slide seat to move in the up-down direction;
• and
• a second power unit, which is mounted to the vertical column to drive the second slide seat to move in the up-down direction;
• wherein the first and second right slide block assemblies are set in slidable engagement with one of the linear rails located at right side and the first and second left slide block assemblies are set in slidable engagement with one of the linear rails located at left side;
• and a spacing distance between the first slide blocks is different from a spacing distance between the second slide blocks that are in slidable engagement with the same one of the linear rails and the first and second slide blocks are alternate with each other in the up-down direction.