Rotary cutter-bar with blade sensor

Patent metadata

Field	Value
Publication number	US-12453307-B2
Application number	US-202217935171-A
Country	US
Kind code	B2
Filing date	Sep 26, 2022
Priority date	Sep 26, 2022
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A mower implement includes a cutter bar extending along a central bar axis. A rotating blade assembly is mounted on the cutter bar. The rotating blade assembly includes a disc rotatable about a disc rotation axis relative to the cutter bar, and at least one blade pivotably mounted to the disc. A blade sensor is mounted on the cutter bar. The blade sensor has a sensing field, and is positioned to detect movement of the at least one blade of the rotating blade assembly through the sensing field during each rotation of the disc about the disc rotation axis. A diagnostic controller receives the data signal from the blade sensor and is configured to analysis the blade signal and identify a fault in the rotating blade assembly. The diagnostic controller may then notify an operator of the identified fault.

First claim

What is claimed is:

1 . A mower implement comprising:
a cutter bar extending along a central bar axis; a first rotating blade assembly and a second rotating blade assembly mounted on the cutter bar, each of the first rotating blade assembly and the second rotating blade assembly including a respective disc rotatable about a respective disc rotation axis relative to the cutter bar, and at least one respective blade pivotably mounted to the respective disc of each of the first rotating blade assembly and the second rotating blade assembly; a blade sensor mounted on the cutter bar and having a sensing field, wherein the blade sensor is positioned to detect movement of the at least one respective blade on the respective disc of the first rotating blade assembly and the at least one respective blade on the respective disc of the second rotating blade assembly through the sensing field during each rotation of the respective disc about the respective disc rotation axis of the first rotating blade assembly and the respective disc about the respective disc rotation axis of the second rotating blade assembly.

2 . The mower implement set forth in claim 1 , wherein the blade sensor is positioned between the first rotating blade assembly and the second rotating blade assembly along the central bar axis, such that the sensing field of the blade sensor is positioned to detect the at least one respective blade from each of the first rotating blade assembly and the second rotating blade assembly.

3 . The mower implement set forth in claim 1 , wherein the blade sensor includes one of an electromagnetic induction sensor, an optical sensor, a magnetic sensor, a light sensor, a radar sensor, and an ultrasonic sensor.

4 . The mower implement set forth in claim 1 , further comprising a diagnostic controller in communication with the blade sensor, wherein the diagnostic controller includes a processor and a memory having a blade diagnostic algorithm stored thereon, wherein the processor is operable to execute the blade diagnostic algorithm to:
receive a data signal from the blade sensor related to the at least one respective blade of the first rotating blade assembly and the at least one respective blade of the second rotating blade assembly cyclically moving through the sensing field of the blade sensor during a period of time; identify a fault associated with one of the first rotating blade assembly and the second rotating blade assembly from the data signal received from the blade sensor based on the presence or absence of the at least one respective blade of the first rotating blade assembly and the at least one respective blade of the second rotating blade assembly during each rotation of their respective disc about their respective disc rotation axis; and communicate a notification signal including the identified fault to a communicator.

5 . The mower implement set forth in claim 1 , wherein the cutter bar includes a barrier shaped to protect the blade sensor.

6 . The mower implement set forth in claim 1 , wherein the blade sensor is positioned below the first rotating blade assembly and the second rotating blade assembly relative to a direction of gravity.

7 . The mower implement set forth in claim 1 , wherein the blade sensor is positioned above the first rotating blade assembly and the second rotating blade assembly relative to a direction of gravity.

8 . The mower implement set forth in claim 4 , wherein the fault is one of a missing one of the at least one blade, a mistimed rotating blade assembly, a bent one of the at least one blade, or a shorn gear drive of the cutter bar.

Assignees

• Deere & Co

Inventors

• Roth Darin L
• Graeve Joshua D

Classifications

• A01D34/03

  mounted on a vehicle, e.g. a tractor, or drawn by an animal or a vehicle · CPC title

• A01D34/006

  Control or measuring arrangements · CPC title

• A01D34/37 Primary

  electric · CPC title

• A01D34/664 Primary

  Disc cutter bars · CPC title

• A01D34/833

  with blades on endless sprocket chains · CPC title