Joints and connections – Interfitted members – Radially interposed shim or bushing
Patent
1992-03-12
1993-12-14
Reese, Randolph A.
Joints and connections
Interfitted members
Radially interposed shim or bushing
403 16, F16D 106
Patent
active
052696227
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND
British Patent Specification 1,417,107 discloses a taper clamping unit having two interacting taper rings. One of the taper rings has a radial flange in which axial clamping screws are arranged which with their head ends partly overlap the other taper ring, and with the margin of the head engage on one side in an outer peripheral groove of the other taper ring. When the clamping screws are tightened or released, the heads lie against one or the other flank of the peripheral groove.
This taper clamping unit is not suitable for exerting great forces since the screws are only supported on one side with the margin of their heads and high surface pressures at the bearing point as well as bending moments result.
German Patent Specification 924,407 and U.S. Pat. No. 2,570,604 disclose taper clamping arrangements which do not represent self-contained taper clamping units but have similar features.
DE-A 2,444,104 discloses another known clamping unit.
SUMMARY OF THE INVENTION
An object of the invention is to develop a congeneric taper clamping unit in such a way that it is simple and variable and is able to transmit greater forces in a purely frictional manner.
This object is achieved by providing a taper clamping unit, having a longitudinal axis being disposed in an intermediate space defined between a cylindrical recess of an outer component and a cylindrical outer peripheral surface of an inner component, for clamping and unclamping the inner and outer components to and from each other, respectively. The taper clamping unit includes:
a first taper ring having a tapered peripheral surface, a flank which is perpendicular to the longitudinal axis, and a cylindrical peripheral surface;
a second taper ring having a tapered peripheral surface which bears on the tapered peripheral surface of the first taper ring, a plurality of taped holes which are parallel to the longitudinal axis and disposed around a periphery of said second taper ring, and a cylindrical peripheral surface, the respective tapered peripheral surface of the first and second taper rings having an identical taper angle;
a plurality of screws each having a shank and a peripheral projection, the peripheral projection including first and second opposing bearing surfaces which are each perpendicular to the longitudinal axis and which project radially beyond the shank, wherein said threads of each of the screws engage a respective one of the tapped holes;
a cylindrical bush bearing on at least one of the cylindrical peripheral surfaces of the first and second taper rings and having a radial end flange with a flank that is perpendicular to the longitudinal axis such that the flank of the end flange and the flank of the first taper ring define a recess therebetween in which the peripheral projections are disposed; and
wherein at times when the screws are tightened, the second bearing surface bears against the flank of the first taper ring producing first axial forces and the flank of the first taper ring withstands the first axial forces such that at least one of the tapered peripheral surfaces of the first and second taper rings slides relative to the other of the tapered peripheral surfaces of the first and second taper rings thereby clamping the inner and outer components together, and at times when said plurality of screws are unscrewed, the first bearing surface bears against the flank of the radial end flange and produces second axial forces, and the flank of the radial end flange withstands the second axial forces such that at least one of the tapered peripheral surfaces of the first and second taper rings slides relative to the other of the tapered peripheral surfaces of the first and second taper rings thereby unclamping the inner and outer components from each other.
Owing to the fact that the flanks of one taper ring or of the cylindrical bush extend in each case in front of large portions of the bearing surface of the relevant peripheral projection, the peripheral projection has an abutment almost over the full area on both bearing
REFERENCES:
patent: 2570604 (1961-10-01), Siegerist
patent: 2849886 (1958-09-01), McCloskey
patent: 3957381 (1976-05-01), Schafer
patent: 3958888 (1976-05-01), Mullenberg
patent: 4053244 (1977-10-01), Dively
patent: 4268185 (1981-05-01), Mullenberg
patent: 4348132 (1982-09-01), Mullenberg
patent: 4557621 (1985-12-01), Mullenberg
patent: 4573825 (1986-03-01), Mullenberg
patent: 4846761 (1989-07-01), Weiss
Kim Harry C.
Reese Randolph A.
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