Extended boring bar connecting apparatus based on zero-point positioning mechanisms

An extended boring bar connecting apparatus based on zero-point positioning mechanisms, comprising a power spindle box assembly (1), a boring bar seat assembly (2) and an extended boring bar assembly (3), wherein a side surface of the power spindle box assembly (1) is used as a connection base surface of the boring bar seat assembly (2), and the extended boring bar assembly (3) is clamped in inner holes of hydraulic expansion sleeves of the boring bar seat assembly (2), and is also connected to a power spindle tool interface (7) in the power spindle box assembly (1);

• wherein
• the side surface of the power spindle box assembly (1) is mainly composed of a side surface of a power spindle box (8) and an auxiliary positioning block (13);
• the side surface of the power spindle box (8) and the auxiliary positioning block (13) are located on a same plane on which a plurality of boring bar seat connecting zero-point positioning blind rivets (9) are distributed for connecting the boring bar seat assembly (2);
• a female end (10) of a hydraulic quick coupler and a female end (12) of a cutting fluid quick coupler are also arranged on the side surface of the power spindle box assembly (1), and are used respectively for providing hydraulic oil for the boring bar seat assembly (2) and providing cutting fluid for the extended boring bar assembly (3);
• and rubber vibration-reduction blocks (11) are also installed on the side surface of the power spindle box assembly (1) for vibration reduction after the connection of the boring bar seat assembly (2).