Back to results
US 5,964,556 AGranted
Flange and taper simultaneous fit rotary tool holder
AssigneeRichmill USA, Inc.
InventorHiromitsu Toyomoto
Life of this patent
Estimating the term…
Abstract
A device for holding and securing a rotating tool to be attached to the spindle shaft of a machine tool, that can realize ultra-precise cutting or grinding work under conditions of high rotation speed and rapid feeding. A tool holder consists of an outer cylinder having a tapered outside peripheral surface which comes into contact with the inside peripheral surface in a tapered hole of a spindle shaft; an inner cylinder which fits in such a manner that the outer cylinder can slide in an axial direction; a retainer having an outer armor which is formed at the front end of the inner cylinder and can contact the top end of said spindle shaft; and an elasticity-accelerating member which imparts elastic force to the retainer such that the outer cylinder can move towards its base end.
Claims16
A rotary tool holder comprising:
- an outer cylinder having an inside peripheral surface, and a tapered outside peripheral surface which comes into contact in a tapered hole with an inside peripheral surface of a spindle shaft;
- an inner cylinder, having an outside peripheral surface, which fits in such a manner that said outer cylinder can slide in an axial direction;
- a flange which is formed at a first end of said inner cylinder and configured to contact the first end of said spindle shaft;
- an elasticity-accelerating member which imparts elastic force to said flange when said flange is in contact with said first end of said spindle shaft so that said outer cylinder moves towards a second end of said spindle shaft;
- a first concavity and a second concavity formed at a specified circumferential pitch such that they oppose each other on said inside peripheral surface of said outer cylinder and said outside peripheral surface of said inner cylinder;
- and
- rotation-stopping balls installed between said first concavity and said second concavity.
4 more elements
A rotary tool holder comprising:
- an outer cylinder having an inside peripheral surface, and a tapered outside peripheral surface which comes into contact in a tapered hole with an inside peripheral surface of a spindle shaft;
- an inner cylinder, having an outside peripheral surface, which fits in such a manner that said outer cylinder can slide in an axial direction;
- a flange which is formed at a first end of said inner cylinder and configured to contact the first end of said spindle shaft;
- an elasticity-accelerating member which imparts elastic force to said flange when said flange is in contact with said first end of said spindle shaft so that said outer cylinder moves towards a second end of said spindle shaft;
- a ring-shaped first spacer installed at a position where said elasticity-accelerating member is accepted;
- and
- a second spacer having an inverted-L-shaped cross section fitted at a second end of said inner cylinder.
4 more elements
A rotary tool holder comprising:
- an outer cylinder having an inside peripheral surface with a small-diameter inside peripheral surface and a large-diameter inside peripheral surface, and a tapered outside peripheral surface which comes into contact in a tapered hole with an inside peripheral surface of a spindle shaft, said outer cylinder having first longitudinal slits passing from the outside peripheral surface through the inside peripheral surface extending inwardly along the length of said large-diameter inside peripheral surface, and second longitudinal slits passing from the outside peripheral surface through the inside peripheral surface extending inwardly along the length of said small-diameter inside peripheral surface;
- an inner cylinder, having an outside peripheral surface, which fits in such a manner that said outer cylinder can slide in an axial direction;
- a flange which is formed at a first end of said inner cylinder and configured to contact the first end of said spindle shaft;
- and
- an elasticity-accelerating member which imparts elastic force to said flange when said flange is in contact with said first end of said spindle shaft so that said outer cylinder moves towards a second end of said spindle shaft.
2 more elements
A rotary tool holder comprising:
- an outer cylinder having an inside peripheral surface with a small-diameter inside peripheral surface and a large-diameter inside peripheral surface, and a tapered outside peripheral surface which comes into contact in a tapered hole with an inside peripheral surface of a spindle shaft, said outer cylinder having longitudinal grooves on the large-diameter inside peripheral surface;
- an inner cylinder, having an outside peripheral surface, which fits in such a manner that said outer cylinder can slide in an axial direction;
- a flange which is formed at a first end of said inner cylinder and configured to contact the first end of said spindle shaft;
- and
- an elasticity-accelerating member which imparts elastic force to said flange when said flange is in contact with said first end of said spindle shaft so that said outer cylinder moves towards a second end of said spindle shaft.
2 more elements
Dependencies are inferred from the claim text.