Drive device for PTO shaft of working machine

Patent metadata

Field	Value
Publication number	US-11472285-B2
Application number	US-202016819449-A
Country	US
Kind code	B2
Filing date	Mar 16, 2020
Priority date	Jun 22, 2016
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

A drive device for a PTO shaft includes a parking switch to detect a parking state of a vehicle body, a permission switch constituted of a self-returning switch and connected to the parking switch, the permission switch being configured to be switched to permit driving a PTO shaft, the PTO shaft being configured to be driven by a power of a prime mover disposed on the vehicle body, and a first switch device to be switched to enable the PTO shaft to be driven when the permission switch is switched to permit driving the PTO shaft under a state where the parking switch detects the parking state of the vehicle body.

First claim

What is claimed is:

1. A drive device for a PTO shaft comprising:
a parking switch to detect a parking state of a vehicle body;
a first switch arranged on an operation portion disposed on the vehicle body, the first switch being configured to be switched to enable the PTO shaft to be driven, the PTO shaft being disposed on the vehicle body;
a second switch arranged on a portion different from the operation portion, the second switch being configured to be switched to enable the PTO shaft to be driven; and
a controller to drive the PTO shaft when any one of the first switch and the second switch is turned on,
wherein
the controller includes
a first controller to stop driving the PTO shaft when the parking switch does not detect the parking state of the vehicle body under a state where the second switch is turned on to drive the PTO shaft, and

wherein the first switch is configured to be switched to a first position representing an ON position where the PTO shaft is being driven, a second position representing an OFF position where the PTO shaft is being not driven, and a third position representing a neutral position where the PTO shaft is in neutral, and
the controller permits operation of a prime mover when the first switch is positioned at the third position under a state where the second switch is turned off, the prime mover being disposed on the vehicle body.

Assignees

• Kubota Kk

Inventors

• Togo Manabu
• Miyake Hiroshi
• Kataoka Ryuji
• Gono Tsuyoshi

Classifications

• B60W10/30

  including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps · CPC title

• B60W30/1888

  Control of power take off [PTO] · CPC title

• B60W2050/143

  Alarm means · CPC title

• F16H2061/026

  On-off solenoid valve · CPC title

• F16H63/483

  Circuits for controlling engagement of parking locks or brakes · CPC title