Reference table tilting mechanism
AssigneeHarmonic Drive Systems Inc.
InventorJiro Chiba
Life of this patent
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Abstract
A reference table tilting mechanism has a reference table which is supported by a plate spring and is adjusted of its angle of inclination by first and second angle adjusting machines constituted by an eccentric cam mechanism. Angles of inclination of the reference table in first and second directions are detected by first and second inclination angle sensors. Based on the detected angles by these sensors, the respective angle adjusting machines are feed-back controlled to make the angle of inclination of the reference table to be a desired one in each direction. Whereby, such a reference table tilting mechanism can be realized that has a simplified structure and a high rigidity, and is manufactured at a low price.
Claims8
A reference table tilting mechanism comprising a reference table, first and second eccentric cam type angle adjusting means for adjusting an angle of inclination of the reference table, and a spring for supporting the reference table, wherein
- the first eccentric cam type angle adjusting means has an eccentrically rotatable first disc shaped cam which is in contact with the reference table and is arranged so that a first contact point between the first disc shaped cam and the reference table moves vertically as the first disc shaped cam is eccentrically rotated,
- the second eccentric cam type angle adjusting means has an eccentrically rotatable second disc shaped cam which is in contact with the reference table at a position different from the first contact point and is arranged so that a second contact point between the second disc shaped cam and the reference table moves vertically as the second disc shaped cam is eccentrically rotated, and
- the reference table is supported by the spring at a point which is different from the first and second contact points.
A reference table tilting mechanism comprising:
- a reference table,
- a first eccentric cam,
- a second eccentric cam, and
- a spring for supporting the reference table,
- the first eccentric cam has an eccentrically rotatable first disc which is in contact with the reference table and is arranged so that a first contact point between the first disc shaped cam and the reference table moves vertically as the first disc is eccentrically rotated,
- the second eccentric cam has an eccentrically rotatable second disc which is in contact with the reference table at a position different from the first contact point and is arranged so that a second contact point between the second disc shaped cam and the reference table moves vertically as the second disc is eccentrically rotated, and
- the reference table is supported by the spring at a point which is different from the first and second contact points.
Dependencies are inferred from the claim text.