Clamping device comprising a centering device on a grinding spindle rotor, and rotary part comprising one such centering device

A clamping device, comprising:

• a rotary part including an interior recess and three support bodies that are disposed at an angular interval from one another in said interior recess, said rotary part being receivable on a grinding spindle rotor which includes a centering section that continuously centeringly receives said rotary part while passing through the interior recess thereof with mutually centering contact between the interior recess of the rotary part and the centering section of the grinding spindle rotor via said three support bodies, two of the three support bodies comprising fixed projections of said rotary part that project into the interior recess of the rotary part, and a third support body of the three support bodies including an adjusting member that is movably carried in said rotary part for movement thereof between a radially outward position and a radially inward centering position, said centering position being adjacent to said centering section, wherein said adjusting member comprises a cam disk carried in said rotary part having an axis of rotation parallel to said axis or rotation of said rotary part, said cam disk including an engagement opening for inserting a torsional tool into an end face thereof;
• two bearing pins that are disposed in said rotary part parallel to said axis of rotation thereof, an exterior contour of said cam disk being supported on said two bearing pins;
• and
• a detachable device for securably axially clamping the rotary part on the grinding spindle rotor.

A clamping device, comprising:

• a rotary part including an interior recess and three support bodies that are disposed at an angu1ar interval from one another in said interior recess, said rotary part being receivable on a grinding spindle rotor which includes a centering section that continuously centeringly receives said rotary part while passing through the interior recess thereof with mutually centering contact between the interior recess of the rotary part and the centering section of the grinding spindle rotor via said three support bodies, two of the three support bodies comprising fixed projections of said rotary part that project into the interior recess of the rotary part and a third support body of the three support bodies including an adjusting member that is movably carried in said rotary part for movement thereof between a radially outward position and a radially inward centering position, said centering position being adjacent to said centering section;
• and
• a detachable device for securably axially clamping the rotary part on the grinding spindle rotor, wherein:
• said adjusting member is a pin that is pre-stressed with a compression spring and which is displaceably carried in a radially running bore of said rotary part, said pin being disposed adjacent to said centering section;
• said compression spring is pre-stressed inwardly into said interior recess;
• and
• said pin is engaged by a pivoting lever that is carried in said rotary part, said pivoting lever having a pivot axis which runs parallel to an axis of rotation of said rotary part, said pivoting lever including an engagement opening for inserting a torsional tool into an end face thereof.

A rotary part for a clamping device, the rotary part configured to effect axial alignment on a grinding spindle rotor defining a grinding axis and having a centering section extending from said grinding spindle rotor and coaxially aligned with said grinding axis, the clamping device comprising:

• a base body including an interior recess having a peripheral recess wall;
• alignment contact portions arranged to coaxially align the base body on the centering section, the alignment contact portions consisting of three support bodies extending radially inward from said peripheral recess wall and disposed angularly displaced from one another along a circumferential direction of said interior recess for centering based on three locations;
• the interior recess and said three support bodies being configured to accept the centering section between the three support bodies so as to coaxially align the base body with the grinding axis by positioning the base body on the centering section via said three support bodies;
• said three support bodies consisting of two fixed projections fixed relative said base body that project into the interior recess of the base body and a third support body which is an adjusting member that is movably carried in the base body and which is radially adjustable in said interior recess such that said adjusting member is movable between a radially outward position and a radially inward centering position adjusting the base body to be coaxially aligned with said grinding axis, said centering position being extended into the interior recess;
• and
• said two fixed projections presenting a contour oriented to engage the centering section, the contour being convex arch with an axial extending apex configured to engage the centering section along an area limited to substantially a linear contact area.