US 11,268,614 B2Granted

Working vehicle

AssigneeKubota Corporation

InventorsYoshihiko Kuroshita, Tetsuo Yamaguchi, Michita Kono, Hitoshi Azuma, Shinji Ohara

Life of this patent

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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.

Claims9

Dependent claims

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.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/893,491Filed 5 Jun 2020
Priority: JP JP2019-10910011 Jun 2019
Published: US 2020/0393041 A117 Dec 2020
Granted: 8 Mar 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

B60T 1/06
Acting by retarding wheels: acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
F16H 61/16
Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid…
B60K 17/02
Arrangement or mounting of transmissions in vehicles: characterised by arrangement, location, or kind of clutch
B60T 1/062
Acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels: acting on transmission parts