Cycloidal reducer with helical toothing for power steering
AssigneeJtekt Europe
InventorsLaurent Rey, Jean-Michel Saniez
Life of this patent
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Abstract
A cycloidal gear pair reducer including an input shaft, mounted in a reducer casing such that it rotates about an axis referred to as “main axis”, an eccentric member carried by the input shaft and rotated by the latter, at least one cycloidal disc rotatably mounted on the eccentric member and having a cycloidal toothing, at least one ring gear provided with a receiving toothing with which the cycloidal toothing of the cycloidal disc meshes, and an output shaft, separate from the input shaft, arranged to be rotated by the cycloidal disc; the cycloidal toothing of the disc and the corresponding receiving toothing of the ring gear being helical.
Claims5
A cycloidal gear reducer comprising:
- an input shaft rotatably mounted in a reducer casing along a main axis,
- an eccentric member carried by the input shaft and rotatably driven by the input shaft,
- at least one cycloidal disc rotatably mounted on the eccentric member and provided with a cycloidal toothing,
- at least one crown provided with a receiving toothing with which the cycloidal toothing of the cycloidal disc meshes, and
- an output shaft, distinct from the input shaft arranged to be rotatably driven by the cycloidal disc,
- wherein the cycloidal toothing of the disc and the corresponding receiving toothing of the crown are helical,
- wherein the reducer includes two reduction stages, including (i) a first reduction stage which comprises the eccentric member, a cycloidal input disc, which is rotatably mounted on the eccentric member and which is provided with a first cycloidal toothing, as well as an input crown, which is secured to the reducer casing and which is provided with a first cycloidal receiving toothing with which the first cycloidal toothing of the input disc meshes, and (ii) a second reduction stage which comprises a cycloidal output disc, which is rotatably secured to the input disc, and which is provided with a second cycloidal toothing, the second reduction stage also comprising an output crown, which is distinct from the input crown, which is rotatably secured to the output shaft and which is provided with a second cycloidal receiving toothing with which the second cycloidal toothing of the output disc meshes, and wherein the first cycloidal toothing of the input disc and the first cycloidal receiving toothing of the input crown have an input helix angle, and the second cycloidal toothing of the output disc and the second cycloidal receiving toothing of the output crown have an output helix angle, and
- wherein the input helix angle and the output helix angle are oriented in the same direction relative to the main axis, so that the first and the second reduction stages are arranged in an arrangement with substantially parallel toothings.
Dependencies are inferred from the claim text.