The invention discloses a single-
pendulum single-
servo-drive 3 + 2 motorized spindle swing head which comprises an upper box body, a lower box body, a spindle box, a motorized spindle, a C-axis
assembly, an A-axis
assembly and a transmission
assembly, the C-axis assembly comprises a C-axis positioning assembly and a C-axis driving assembly, the A-axis assembly comprises an A-axis positioning assembly and an A-axis driving assembly, a spigot of the upper box body is connected to the bottom end of a ram, the motorized spindle is arranged in the spindle box, and the transmission assembly is arranged in the lower box body. The spindle box is of a simple
pendulum offset structure; and the C-axis driving assembly and the A-axis driving assembly share one set of
servo motor and speed
reducer. The swing head integrates a high-power high-speed motorized spindle, a crankset positioning function for improving rigidity, a single-
servo driving double-shaft transposition function and a safe self-locking function, and realizes synchronous reduction of manufacturing cost and use cost, remarkable simplification of
control logic and synchronous improvement of structural compactness and reliability. Compared with a double-servo-drive or direct-drive swing head of the same specification, the swing head has the outstanding advantages in the aspects of cost, size, control and safety, and is particularly suitable for 3 + 2 indexing
machining.