Double-swing angle spindle head

A double-swing angle spindle head, comprising,

• an A-axis swing shaft, a B-axis swing structure, a spindle head, a linear push-pull mechanism, a ram and a saddle, wherein
• the B-axis swing structure has a B-axis rotating shaft, a first rotating shaft, a second rotating shaft, a swing connecting rod, a B-axis push-pull mechanism, and a box,
• the B-axis push-pull mechanism has a B-axis push-pull slide plate and a B-axis drive structure, wherein
• the B-axis push-pull slide plate is arranged above the ram, one end of the B-axis push-pull slide plate is movably connected with one end of the swing connecting rod through the first rotating shaft, the other end of the swing connecting rod is movably connected to the box through the second rotating shaft, and the B-axis drive structure drives the B-axis push-pull slide plate to move linearly along the ram,
• the spindle head is located in the box, the spindle head axis intersects perpendicularly with the B-axis rotating shaft axis;
• the box is movably connected with the front end of the ram through the B-axis rotating shaft,
• the A-axis swing shaft is connected with the spindle head through a flange;
• the A-axis swing shaft axis and the B-axis rotating shaft axis are coplanar,
• the saddle is arranged below the ram, the linear push-pull mechanism is arranged on the saddle;
• the linear push-pull mechanism drives the ram to move linearly on the saddle;
• wherein the first rotating shaft axis is arranged between the B-axis rotating shaft and the second rotating shaft, when the box achieves the limit range of −35° to +35° around the B-axis rotating shaft, the angle of the smallest interior angle of the triangle formed by the axes of the B-axis rotating shaft, the first rotating shaft and the second rotating shaft is not less than 30°.