Working vehicle

Patent metadata

Field	Value
Publication number	US-11268614-B2
Application number	US-202016893491-A
Country	US
Kind code	B2
Filing date	Jun 5, 2020
Priority date	Jun 11, 2019
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

A working vehicle includes a traveling clutch to be switched between an engaging state and a disengaging state, a brake to brake the traveling device according to an operation of a brake operator, and a controller to perform a braking control to perform the braking, and an auto-switching controller to switch the traveling clutch from the engaging state to the disengaging state. The controller performs a first processing to switch the traveling clutch from the engaging state to the disengaging state when the brake operator is operated in a case where the auto-switching control is valid and a vehicle speed is less than a threshold, and a second processing to prevent the traveling clutch from being switched from the engaging state to the disengaging state even when the brake operator is operated in a case where the vehicle speed is equal to or higher than the threshold.

First claim

What is claimed is:

1. A working vehicle comprising:
a traveling clutch to be switched between:
an engaging state allowing power to be transmitted to a traveling device; and
a disengaging state cutting the power to be transmitted to the traveling device;

a brake to brake the traveling device according to an operation of a brake operator;
a controller to perform:
a braking control to perform the braking according to the operation of the brake operator; and
an auto-switching control to switch the traveling clutch from the engaging state to the disengaging state according to the operation of the brake operator;

a switch to switch the auto-switching control between valid and invalid;
an operator seat; and
a sitting detector sensor to detect whether an operator is sitting on the operator seat; wherein
the controller performs:
a first processing to switch the traveling clutch from the engaging state to the disengaging state when the brake operator is operated in a case where the auto-switching control is valid and a vehicle speed of the traveling device is less than a threshold; and
a second processing to prevent the traveling clutch from being switched from the engaging state to the disengaging state even when the brake operator is operated in a case where the vehicle speed of the traveling device is equal to or higher than the threshold; and

the controller holds the traveling clutch in the disengaging state when the sitting detector sensor does not detect that the operator is sitting on the operator seat after the first processing.

2. A working vehicle comprising:
a traveling clutch to be switched between:
an engaging state allowing power to be transmitted to a traveling device; and
a disengaging state cutting the power to be transmitted to the traveling device;

a brake to brake the traveling device according to an operation of a brake operator;
a controller to perform:
a braking control to perform the braking according to the operation of the brake operator; and
an auto-switching control to switch the traveling clutch from the engaging state to the disengaging state according to the operation of the brake operator; and

a switch to switch the auto-switching control between valid and invalid; wherein
the controller performs:
a first processing to switch the traveling clutch from the engaging state to the disengaging state when the brake operator is operated in a case where the auto-switching control is valid and a vehicle speed of the traveling device is less than a threshold; and
a second processing to prevent the traveling clutch from being switched from the engaging state to the disengaging state even when the brake operator is operated in a case where the vehicle speed of the traveling device is equal to or higher than the threshold; and

the working vehicle further comprises a notifier to notify that the first processing has been performed.

3. The working vehicle according to claim 1 , wherein the brake operator includes:
a plurality of operator portions to perform the operation of the brake operator; wherein
the controller performs the first processing when the plurality of operator portions perform the operation of the brake operator.

4. A working vehicle comprising:
a traveling clutch to be switched between:
an engaging state allowing power to be transmitted to a traveling device; and
a disengaging state cutting the power to be transmitted to the traveling device;

a brake to brake the traveling device according to an operation of a brake operator;
a controller to perform:
a braking control to perform the braking according to the operation of the brake operator; and
an auto-switching control to switch the traveling clutch from the engaging state to the disengaging state according to the operation of the brake operator; and

a switch to switch the auto-switching control between valid and invalid; wherein
the controller performs:
a first processing to switch the traveling clutch from the engaging state to the disengaging state when the brake operator is operated in a case where the auto-switching control is valid and a vehicle speed of the traveling device is less than a threshold; and
a second processing to prevent the traveling clutch from being switched from the engaging state to the disengaging state even when the brake operator is operated in a case where the vehicle speed of the traveling device is equal to or higher than the threshold;

the switch includes a clutch switch to switch the traveling clutch from the engaging state to the disengaging state; and
the controller switches the auto-switching control from being valid to being invalid when the clutch switch is operated under a state where the auto-switching control is valid.

5. The working vehicle according to claim 4 , wherein the controller switches the auto-switching control from valid to invalid when the clutch switch and the brake operator are operated in the state where the auto-switching control is valid.

6. The working vehicle according to claim 1 , wherein the controller judges whether to perform the first processing according to an operation extent of the brake operator.

7. The working vehicle according to claim 6 , further comprising a display to set the operation extent for determining to perform the first processing.

8. The working vehicle according to claim 1 , further comprising a display to set a threshold of the vehicle speed.

9. The working vehicle according to claim 1 , further comprising a display to display that the auto-switching control is valid or invalid and to display the first processing.

Assignees

• Kubota Kk

Inventors

• Kuroshita Yoshihiko
• Yamaguchi Tetsuo
• KONO Michita
• Azuma Hitoshi
• Ohara Shinji

Classifications

• F16H2061/165

  Preventing reverse gear shifts if vehicle speed is too high for safe shifting · CPC title

• B60T7/14

  operated upon collapse of driver (deadman's devices for electrically propelled vehicles B60L3/02) · CPC title

• B60Y2200/221

  Tractors · CPC title

• F16H61/16 Primary

  Inhibiting  {or initiating}  shift during unfavourable conditions  {, e.g. preventing forward-reverse shift at high vehicle speed, preventing engine overspeed}   (F16H61/18 takes precedence) · CPC title

• F16H2710/10

  the control being hydraulic or pneumatic · CPC title