Clamping apparatus
AssigneeKosmek Ltd.
InventorToshinao Nishimoto
Life of this patent
Estimating the term…
Abstract
An annular piston (20) is inserted into a lower portion of a guide bore (17) of a housing (11), and a transmission sleeve (24) is inserted into the cylindrical bore (20a) of the piston (20) with a first annular gap (21) defined therebetween. A ring-shaped operation member (36) is inserted into an upper portion of the guide bore (17) with a second annular gap (22) defined therebetween. At the time of clamping, first a pull bolt (3) is inserted into the sleeve (24) and then the sleeve (24) is driven downward by the piston (20). Thereupon, balls (37) are changed over to an engagement position (X) by the operation member (36), so that a driving force of the piston (20) can be transmitted to a workpiece (1) through the sleeve (24), the balls (37) and the pull bolt (3).
Claims7
A clamping apparatus comprising:
- a housing (11) having a first end and a second end;
- a guide bore (17) having an axis (A) and being opened at the first end of the housing (11);
- a driving member (20) having a cylindrical bore (20a) and adapted to be inserted into a second end side portion of the guide bore (17) and to be moved along the axis (A);
- a transmission sleeve (24) adapted to be inserted into the cylindrical bore (20a) and to be moved to the second end by the driving member (20), into which sleeve (24) a rod (3) having an engaging portion (5) is inserted;
- a return means (31) for moving the transmission sleeve (24) to the first end;
- an operation member (36) adapted to be inserted into a first end portion of the guide bore (17);
- a first annular gap (21) defined between the cylindrical bore (20a) and the transmission sleeve (24);
- a second annular gap (22) defined between the guide bore (17) and the operation member (36);
- and
- an engagement member (37) supported by the first end portion of the transmission sleeve (24), the engagement member (37) being adapted to be changed over between an engagement position (X) where it engages with the engaging portion (5) and an engagement cancelling position (Y) where it disengages from the engaging portion (5), by the movement of the transmission sleeve (24) along the axis (A) with respect to the operation member (36).
Dependencies are inferred from the claim text.