Cutting sharpness detection device

US11566883B2 · kind B2 · utility

Assignee

• CLAAS Selbstfahrende Erntemaschinen GmbH · DE

Inventors

• Christoph Heitmann · Warendorf, DE
• Dennis Neitemeier · Lippetal, DE
• Markus Brune · Harsewinkel, DE
• Jochen Huster · Vellmar, DE
• Frédéric Fischer · Arnsberg, DE
• Bjoern Stremlau · Recke, DE

Key dates

• Filing date: Mar 11, 2020
• Grant date: Jan 31, 2023
• Expiry date: Aug 4, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B7/023
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A detection arrangement for detecting a wear status of a chopping knife arrangement of a chopping device provided for processing a product flow, wherein the chopping device has a revolving chopping drum receiving the chopping knife arrangement and at least one shear bar which cooperates with the chopping knives, with a sensor arrangement which has a magnetic exciter arrangement and a flux conducting device magnetically coupled thereto. The sensor arrangement provides a pole arrangement which forms at least one magnetic pole with a pole surface for conducting magnetic flux, wherein at least a portion of the chopping knife passes the pole arrangement during a rotation of the chopping drum. A voltage induced when a chopping knife arrangement passes the sensor arrangement forms the measured magnetic value, which is used by the evaluation unit to determine the state of wear of the chopping knife arrangement.