Angular-position measuring device
AssigneeDr. Johannes Heidenhain GmbH
InventorHermann Meyer
Life of this patent
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Abstract
An angular-position measuring device includes a shaft rotatable relative to a body about an axis extending in a z-direction. A measuring standard having an end face is fastened on the shaft in rotatably fixed manner. The body includes a scanning device for scanning the measuring standard. Both the roller bearing and a sealing unit are provided on the side of the measuring standard facing the end face relative to the z-direction, The sealing unit includes rings that are rotatable relative to each other and are separated from each other by a gap, the gap being filled at least partially with a fluid.
Claims15
An angular-position measuring device, comprising:
- a body;
- a roller bearing;
- a shaft rotatable relative to the body, via the roller bearing, about an axis extending in a z-direction;
- and
- a measuring standard, having an end face, fastened on the shaft in rotatably fixed manner;
- wherein the body includes a scanning device adapted to scan the measuring standard;
- wherein both the roller bearing and a sealing unit are arranged on a side of the measuring standard that faces the end face relative to the z-direction;
- and
- wherein the sealing unit includes rings rotatable relative to each other and separated from each other by a gap, the gap being at least partially filled with a fluid.
Dependencies are inferred from the claim text.