Clamp device for rotary shaft portion
AssigneeNikken Kosakusho Works Ltd.
InventorMasakazu Matsumoto
Life of this patent
Estimating the term…
Abstract
A clamp device is provided which is operable with extreme ease for clamping and unclamping a rotary shaft portion under remote control and which is capable of exerting a great clamping force and unlikely to displace the shaft axis. The clamp device includes a fixed sleeve (10) radially elastically deformable, rotatably supporting the shaft portion (7) and having a tapered surface (12) over a periphery thereof on the opposite side of a shaft supporting portion (11) thereof, a rotatable clamp member (17) having a tapered surface fitting to the sleeve tapered surface (12) with rollers (15) provided therebetween, the rollers being arranged as inclined with respect to the axis of the sleeve, and a drive unit (23) for rotating the clamp member.
Claims11
A clamp device for a rotary shaft portion comprising:
- a sleeve fixed to a main body, said sleeve being radially elastically deformable and having an outer periphery rotatably supporting a shaft portion and an inner periphery in the form of a tapered surface of an opposite side of a shaft supporting portion thereof;
- a plurality of rollers arranged on the tapered surface of the fixed sleeve and inclined with respect to the axis of the sleeve;
- a rotatable clamp member having a tapered surface of substantially the same taper angle as the tapered surface of the fixed sleeve and rotatably fitted to the tapered sleeve of the fixed sleeve with the rollers provided therebetween, the rotatable clamp member being axially movable;
- a drive unit rotating said rotatable clamp member;
- a shaft and a plurality of bearings supporting said shaft on said main body wherein said shaft has a part which projects axially outward from the bearing and said part of said shaft is rotatably supported by said fixed sleeve.
A clamp device for a rotary shaft portion comprising:
- a sleeve fixed to a main body, said sleeve being radially elastically deformable and having an outer periphery rotatably supporting the shaft portion and an inner periphery in the form of a tapered surface on an opposite side of a shaft supporting portion thereof;
- a plurality of rollers arranged on the tapered surface of the fixed sleeve and inclined with respect to the axis of the sleeve;
- a rotatable clamp member having a tapered surface of substantially the same taper angle as the tapered surface of the fixed sleeve and rotatably fitted to the tapered surface of the fixed sleeve with rollers provided therebetween, the rotatable clamp member being axially movable;
- and
- a drive unit rotating said rotatable clamp member wherein said fixed sleeve is in rotatable sliding contact with said shaft when said clamp member is not rotated by said drive unit.
A clamp device for a rotary shaft portion comprising:
- a sleeve fixed to a main body, said sleeve being radially elastically deformable and having an outer periphery rotatably supporting a shaft portion and an inner periphery in the form of a tapered surface on an opposite side of a shaft supporting portion thereof;
- a plurality of rollers arranged on the tapered surface of the fixed sleeve and inclined with respect to the axis of the sleeve so as to move helically and axially with respect to said tapered surface upon being rotated;
- a rotatable clamp member having a tapered surface of substantially the same taper angle as the tapered surface of the fixed sleeve and rotatably fitted to the tapered surface of the fixed sleeve with the rollers provided therebetween, the rotatable clamp member being axially movable;
- a drive unit for rotating said rotatable clamp member;
- and
- an axially movable gear by which the clamp member is operatively connected to said drive unit.
A clamp device for a rotary shaft portion comprising:
- a sleeve fixed to a main body, said sleeve being radially elastically deformable and having an outer periphery rotatably supporting a shaft portion and an inner perphiery in the form of a tapered surface on an opposite side of a shaft supporting portion thereof;
- a plurality of rollers arranged on the tapered surface of the fixed sleeve and inclined with the respect to the axis of the sleeve;
- a rotatable clamp member having a tapered surface of substantially the same taper angle as the tapered surface of the fixed sleeve and rotatably fitted to the tapered surface of the fixed sleeve with the rollers provided therebetween, the clamp member being axially movable;
- a drive unit for rotating said rotatable clamp member;
- and
- a gear mechanism by which said rotatable clamp member is operatively connected to said drive unit, wherein a gear of said gear mechanism is connected to said rotatable clamp member by joint which is deformable radially and axially.
Dependencies are inferred from the claim text.