Electric walk behind greens mower

Patent metadata

Field	Value
Publication number	US-11700787-B2
Application number	US-201916437281-A
Country	US
Kind code	B2
Filing date	Jun 11, 2019
Priority date	Jun 13, 2017
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

An electric walk behind greens mower includes an electric reel motor rotating a cutting reel; an electric traction motor rotating at least one traction drive roller; and an electronic control unit commanding the electric traction motor and the electric reel motor to rotate at reduced speeds during a turn if an electronic signal indicates a deviation from a normal walk speed. The electric walk behind greens mower also may include a battery management system that activates a low voltage power supply if a key switch is turned from the off position to the run position, and that provides a start signal to an electronic control unit if the key switch is momentarily turned from the run position to the start position whereby the electronic control unit activates a high voltage power supply to the electric reel motor and the electric traction motor.

First claim

The invention claimed is:

1. An electric walk behind greens mower, comprising:
a key switch having an off position, a run position and a start position;
a battery pack that provides a wake-up signal if the key switch is turned from the off position to the run position;
a battery management system responsive to the wake-up signal to enable a DC-DC converter for the battery pack to supply a low voltage to power on an electronic control unit;
the electronic control unit detecting if the key switch is turned momentarily from the run position to the start position, and if it is so detected, sending a command for the battery pack to supply a high voltage to power a reel motor controller and a traction motor controller.

2. The electric walk behind greens mower of claim 1 wherein the electronic control unit activates a battery management system controller to enable the higher voltage or the lower voltage by sending a command via a CAN bus.

Assignees

• Deere & Co

Inventors

• Kulkarni Punamchandra
• Edake Sandip
• Deenadayalan Saravanan
• Deshpande Chinmay
• Bagwan Rajesaheb
• Agrawal Bhupesh
• Kumar Naveen

Classifications

• A01D34/58 Primary

  electric · CPC title

• A01D34/008

  for automated or remotely controlled operation · CPC title

• A01D34/46

  hand-guided by a walking operator · CPC title

• A01D34/47

  with motor driven cutters or wheels · CPC title

• A01D69/00

  Driving mechanisms or parts thereof for harvesters or mowers (driving mechanisms for the cutters of mowers or harvesters A01D34/00) · CPC title