Angle head holder

An angle head holder installed on a spindle having a positioning block mounted on its outer surface with a constraining groove, and the angle head holder comprising:

• a body base;
• a driving shaft disposed in the body base and mounted to the spindle;
• a holder assembly rotatably disposed in the body base, driven to rotate by the driving shaft, and having an axial direction forming an included angle with an axial direction of the driving shaft;
• and
• a positioning device having
• a fixing ring sleeved on the body base and having a receiving slot formed thereon;
• an adjusting assembly having
• a connecting block detachably mounted to the fixing ring and having a receiving groove formed therein;
• a positioning pin mounted in the receiving groove of the connecting block, protruding out of one of two ends of the receiving groove, and having a retaining groove communicating with the receiving slot of the fixing ring via the receiving groove of the connecting block;
• and
• at least one lever pin detachably mounted in the receiving slot of the fixing ring and the retaining groove of the positioning pin;
• and
• at least one extension block mounted between the fixing ring and the connecting block, the at least one extension block having a containing groove, wherein
• the at least one lever pin extends through the containing groove of the at least one extension block, and
• a distance between the connecting block and the fixing ring is adjustable, and a section of the positioning pin protruding out of the receiving groove is limited by the constraining groove of the positioning block.