Chuck head for automatic machine tools

A chuck head for automatic machine tools comprising:

• a moveable robot arm having an arm shell (2);
• a fork (1) having a pair of fork arms, rotatably mounted about an arm axis (A--A) to said arm shell;
• a thrust bearing (12) connected between said arm shell and said fork for rotatably mounting said fork to said arm shell;
• a spindle housing (3) with driven chuck therein, mounted for rotation about a fork axis (X--X) between said fork arms, said fork axis extending perpendicularly to said arm axis;
• first drive means in said arm shell including an output shaft (5) mounted for rotation parallel to said arm axis;
• a first bevel gear (6) connected to said output shaft;
• a bevel gear shaft (8) extending at an angle to said arm axis into one of said fork arms;
• a second bevel gear (7) connected to one end of said bevel gear shaft and meshed directly with said first bevel gear;
• a third bevel gear (9) connected to an opposite end of said bevel gear shaft;
• a fourth bevel gear (10) fixed to said spindle housing and meshed directly with said third bevel gear, said fourth bevel gear being mounted for rotation in one of said fork arms;
• and
• second drive means mounted in said arm shell and including a drive gear (11) connected to said fork and rotatable in said arm shell about said arm axis.