Unit-type linear displacement measuring apparatus, end fixture therefor, and fixing method using the same
AssigneeMitutoyo Corporation
InventorHiroaki Kawada
Life of this patent
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Abstract
An end fixing block fixed to one end in a length measuring direction of a frame body has a parallel plate spring mechanism capable of absorbing a thermal expansion of the frame body. The frame body has a plate spring mechanism which is provided at the end of the frame body fixed by the end fixing block, the plate spring mechanism being capable of absorbing a deflection of the one end of the frame body in a direction perpendicular to a direction to which the thermal expansion occurs.
Claims7
A unit-type linear displacement measuring apparatus comprising:
- a frame body extending in a length measuring direction and housing a main scale;
- and
- a first end fixture fixed to one end in the length measuring direction of said frame body and having a parallel plate spring mechanism which absorbs a thermal expansion of said frame body,
- wherein said frame body has a plate spring mechanism 1 which is provided at said one end of said frame body, and which absorbs a deflection of said one end of said frame body in a direction perpendicular to a direction to which the thermal expansion occurs, and
- wherein the parallel plate spring mechanism and the plate spring mechanism are coupled to plates.
An end fixture for a unit-type linear displacement measuring apparatus for being fixed to one end in a length measuring direction of a frame body which houses a main scale and which extends in the length measuring direction, so as to fix said frame body to an object to be measured, said end fixture comprising:
- a parallel plate spring mechanism which absorbs a thermal expansion of said frame body,
- wherein said frame body is coupled to said end fixture by the parallel plate spring mechanism and a plate spring mechanism, and
- wherein the parallel plate spring mechanism and the plate spring mechanism are coupled to plates.
A method of fixing a unit-type linear displacement measuring apparatus comprising the step of:
- fixing an object to be measured to a frame body which extends in a length measuring direction and which houses a main scale with a first end fixture fixed to one end in the length measuring direction of said frame body and the first end fixture having a parallel plate spring mechanism which absorbs a thermal expansion of said frame body.
- wherein said frame body is coupled to said first end fixture by the parallel plate spring mechanism and a plate spring mechanism, and
- wherein the parallel plate spring mechanism and the plate spring mechanism are coupled to plates.
Dependencies are inferred from the claim text.