초록 ▼

The tool-holder turret for lathes or like machining centers has a fixed support member (1; 52) bearing a rotary member (4; 51) to which there may be attached a tool-holder plate designed to bear a plurality of tools, each of which can brought into the operating position by the rotation of the rotary

The tool-holder turret for lathes or like machining centers has a fixed support member (1; 52) bearing a rotary member (4; 51) to which there may be attached a tool-holder plate designed to bear a plurality of tools, each of which can brought into the operating position by the rotation of the rotary member, a drive motor (12; 54) also being provided, which is connected to a geared differential transmission unit (15, 18, 20; 47, 18, 20; 57, 64, 66) having three members, the first member, called the driver (15; 47; 57), being connected to the motor and controlling, on one hand, the opening and closing of the turret and, on the other hand, the rotation of its rotary member, the second member, which can be driven in rotation, of the differential unit (18; 18; 64) being connected to the rotary member and the third member, which can be driven in rotation, of the differential unit (20; 20; 66) being connected, via interposed cam transmission means (21, 23; 71, 72), to a rotationally fixed and axially movable member for relative engagement between the fixed member and the rotary member (7; 73), rotational locking members (29; 80; 34, 35; 40, 41; 76, 77) being provided for one of the members which can be driven of the differential unit for the transmission of movement to the other member and to the components associated therewith for the sequential control of the disengagement of the fixed member and the rotary member, the rotation of the rotary member into the preselected position and the reengagement of the fixed member and the rotary member, structure (97, 116) associated with the axially movable and rotationally fixed member also being provided and actuating the coupling of means for the transmission of movement to a rotary tool in the operating position.

대표청구항 ▼

A tool holder turret for a lathe comprising: a housing having a longitudinal axis and provided with a fixed support member coaxial with said housing; a shaft extending longitudinally in said housing and having a respective axis parallel to said longitudinal axis, said shaft having a periphery thereo

A tool holder turret for a lathe comprising: a housing having a longitudinal axis and provided with a fixed support member coaxial with said housing; a shaft extending longitudinally in said housing and having a respective axis parallel to said longitudinal axis, said shaft having a periphery thereof and formed with two opposite ends; a rotary member mounted on one of said ends of said shaft and coaxial therewith; a tool holder plate operatively connected with said rotary member and coaxial with said shaft; a reversible drive motor spaced from said rotary member in said housing and having a motor shaft rotatable about a motor axis parallel to said longitudinal axis; a differential epicyclic transmission unit comprising: a first member driven by said driven motor and coaxial with said longitudinal axis; a second annular member coaxial with said longitudinal shaft and connected rigidly with said shaft; a third annular member spaced axially from said second member and rotatable about said longitudinal shaft, said first member meshing with said second and third members; an axially movable member provided with means for engaging said support member and said rotary member in a preselected angular position of a respective tool of a plurality of tools to be located on said tool holder plate; means for arresting the rotation of said shaft in said preselected angular position of the respective tool; and cam means for transmitting the rotational movement of said third member of said epicyclic transmission unit to said axially movable member for the axial displacement thereof.