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AssigneeKabushiki Kaisha Kitagawa Tekkosho
InventorsTamio Nishimiya, Satoshi Isohisa, Naoyuki Masatsugu, Toshihito Nakamura
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The invention has been developed to solve the drawbacks of the conventional chuck construction, and it is an object of the invention to provide a compact chuck construction, by omitting the axial movement parts, which are inevitable in the conventional chuck construction. A chuck body 10 comprising an axially movable plunger 30 and a jaw 20, in which said jaw 20 having master jaw body 24 obliquely arranged with respect to the axis, said plunger 30 having a bush 41 which act as a wedge, and a driving means 50 at the rear end of the master jaw body 24, said wedge means 40 having a structure of canceling a moment applied to the jaw 20 as a result of clamping and the driving means 50 providing a reactant force to the master jaw body 24 for canceling drawing force applied to the plunger 30.
A chuck body comprising axially movable plungers and jaws, in which said jaw having a master jaw body obliquely arranged with respect to the axis of the chuck body, said plunger receiving a bush which act as a wedge means cooperating with the master jaw body, a driving means at the rear end of the master jaw body, said jaw having a front face of the master jaw body and a rear end face of a master jaw head for restricting a position of the jaw with respect to the chuck body, being restricted a backward movement within a range of a gap δ, said wedge means having a structure of canceling a moment applied to the jaw as a result of clamping and the driving means providing a reactant force to the master jaw body for canceling drawing force applied to the plunger.
A chuck body comprising axially movable plungers and jaws, in which said jaw having a T-shaped master jaw body obliquely arranged with respect to the axis of the chuck body, said plunger having a T-shaped camming groove cooperating with the master jaw body to form a wedge means, forming a wedge means by camming surfaces of the master jaw body and camming surfaces of plunger cam guide grooves, a driving means at the rear end of the chuck body, said jaw being restricted a backward movement within a range of a gap δ at rear end face of a master jaw head and front face of rear body part of the chuck body, said wedge means having a structure of canceling a moment applied to the jaw, as a result of clamping and the driving means providing a reactant force to the master jaw body for canceling drawing force applied to the plunger.
A chuck body comprising axially movable plungers and jaws, in which said jaw having a master jaw body obliquely arranged with respect to the axis of the chuck body, said plunger forming a part of through hole for a bush cooperating with the master jaw body and also having flanges to engage a bush to form a wedge means, said chuck body having through holes for a bush which comprise the wedge means, a driving means at the rear end of the chuck body, said jaw having a limit plate of the master jaw body and a rear end face of a master jaw body for restricting a position of the jaw with respect to the chuck body, being restricted a backward movement within a range of a gap δ, said wedge means having a structure of canceling a moment applied to the jaw, a reactant force to the bush being supported by said chuck body, as a result of clamping and the driving means providing a reactant force to the master jaw body for canceling drawing force applied to the plunger.
10 The chuck body of claim 1 or 9, wherein the sectional shape of the master jaw body is a circle having flat surface at both upper and lower sides thereof.
Dependencies are inferred from the claim text.