Multiturn encoder
AssigneeDr. Johannes Heidenhain GmbH
InventorErich Strasser
Life of this patent
Estimating the term…
Abstract
In a multiturn rotary encoder, a first code disk is arranged with an input shaft for detecting the angular position of the input shaft within one rotation. To detect the number of rotations of the input shaft, a multiturn part is provided with further code disks in the form of magnet bodies which are driven geared down. A printed circuit board having detector devices for scanning the first code disk and the magnet bodies is positioned between the first code disk and the multiturn part. The detector devices of the first code disk and of the magnet bodies are mounted on one common side of a printed circuit board which is opposite the first code disk.
Claims10
A multiturn rotary encoder comprising
- a first code carrier (3) that is connected to an input shaft (2) and is able to be scanned by a detector device (8) for detecting the angular position of the input shaft (2);
- a plurality of further code carriers (10, 11, 12) for measuring the number of rotations of the input shaft (2), each further code carrier (10, 11, 12) being driven geared down via a step-down gear (20) relative to the respective preceding code carrier (3, 10, 11), and a detector device (30) being provided for scanning each further code carrier (10, 11, 12);
- the further code carriers (10, 11, 12) are arranged within the peripheral region of the first code carrier (3),
- wherein
- the detector device (8) of the first code carrier (3) and the detector devices (30) of the further code carriers (10) are disposed on a shared side (40) of a printed circuit board (4).
The multiturn rotary encoder as recited in one of the preceding claims,
- wherein the first code carrier is a code disk (3) that is able to be scanned photoelectrically and that is assigned a photoelectric detector device (8) on the printed circuit board (4).
Dependencies are inferred from the claim text.