Length-measuring device and method for assembling the same
AssigneeDr. Johannes Heidenhain GmbH
InventorKonrad Schweikl
Life of this patent
Estimating the term…
Abstract
A length-measuring device includes a hollow section member having a scale disposed therein. The hollow section member has a slot which extends along the scale, wherein, during position measurement, a drive dog of a scanning unit scanning the scale extends through the slot. The slot is sealed by an elastic seal extending along the hollow section member. A sleeve is attached to at least one end of the seal in a pull-off resistant manner. The sleeve has an axial abutment which is effective in a longitudinal direction of the hollow section member and with which the sleeve bears axially against the hollow section member.
Claims12
A length-measuring device, comprising:
- a hollow section member having a scale disposed therein, the hollow section member having a slot which extends along the scale, wherein, during position measurement, a drive dog of a scanning unit scanning the scale extends through the slot, the slot being sealed by an elastic seal extending along the hollow section member;
- and
- a sleeve attached to at least one end of the seal in a pull-off resistant manner, the sleeve having an axial abutment which is effective in a longitudinal direction of the hollow section member and with which the sleeve bears axially against the hollow section member.
A method for assembling a length-measuring device, comprising:
- providing a hollow section member having a longitudinally extending slot through which a drive dog of a scanning unit scanning a scale disposed within the hollow section member extends during position measurement;
- providing an elastic seal with which the slot is sealable;
- attaching a sleeve to at least one end of the seal in a pull-off resistant manner, the sleeve having an axial abutment which is effective in a longitudinal direction of the hollow section member;
- and then
- positioning the sleeve on the hollow section member such that the abutment of the sleeve bears axially against the hollow section member.
Dependencies are inferred from the claim text.