DE-112024002269-T5 - WORK VEHICLE, SYSTEM INCLUDING A WORK VEHICLE AND METHOD FOR CONTROLLING A WORK VEHICLE

DE112024002269T5DE 112024002269 T5DE112024002269 T5DE 112024002269T5DE-112024002269-T5

Abstract

A vibration suppression device (40) suppresses lateral movement of an operator seat (5S). A locking mechanism (30) switches between locking and unlocking the operation of the vibration suppression device (40). A sensor (41) detects vibration information about lateral vibrations of the operator seat (5S). The controller (50) switches between locking and unlocking the vibration suppression device (40) by the locking mechanism (30) based on a comparison between the vibration information detected by the sensor (41) and preset basic information for isolation operation.

Inventors

Miyuki Yamamoto
Takeshi Furuya
Yuuki Kobayashi
Jun Matsumoto

Assignees

KOMATSU LTD.

Dates

Publication Date: 20260513
Application Date: 20240701
Priority Date: 20230731

Claims (9)

Work vehicle comprising: an operator seat; a vibration suppression device configured to suppress lateral movement of the operator seat; a locking mechanism configured to toggle between locking and unlocking the operation of the vibration suppression device; a sensor configured to detect vibration information about lateral vibration of the operator seat; and a controller configured to toggle between locking and unlocking the vibration suppression device by the locking mechanism based on a comparison between the vibration information detected by the sensor and preset vibration baseline information for isolation operation.
work vehicle Claim 1 , wherein the vibration information includes at least one frequency count and acceleration of the vibrations of the operator seat in a lateral direction.
work vehicle Claim 1 , wherein the vibration information is an output signal from one or more elements selected from the group consisting of a work tool control lever, a drive lever and a work mode changer switch.
work vehicle Claim 1 , further comprising: a floor configured to support the operator seat, wherein the vibration suppression device includes a damping element connected to the operator seat and the floor, respectively.
work vehicle Claim 4 , further comprising: a fluid adjustment device configured to adjust the supply and discharge of fluid to and from the damping element.
work vehicle Claim 4 , wherein the vibration suppression device includes an elastic element that is connected to the operator seat and the floor, respectively.
work vehicle Claim 1 , whereby the basic information for isolation operation is stored in the control unit.
A system comprising a work vehicle, the work vehicle comprising: an operator seat; a vibration suppression device configured to suppress lateral movement of the operator seat; a locking mechanism configured to toggle between locking and unlocking the operation of the vibration suppression device; a sensor configured to detect vibration information about lateral vibration of the operator seat; and a controller configured to toggle between locking and unlocking the vibration suppression device by the locking mechanism based on a comparison between the vibration information detected by the sensor and preset vibration baseline information for isolation operation.
A method for controlling a work vehicle comprising an operator seat, a vibration suppression device that suppresses lateral movement of the operator seat, and a locking mechanism that toggles between locking and unlocking the operation of the vibration suppression device, the method comprising: a step of acquiring vibration information about lateral vibration of the operator seat; and a step of switching between locking and unlocking the operation of the vibration suppression device by the locking mechanism based on a comparison between the acquired vibration information and preset vibration baseline information for isolation operation.

Description

TECHNICAL AREA The present disclosure relates to a work vehicle, a system that includes a work vehicle, and a method for controlling the work vehicle. STATE OF THE ART In a work vehicle, such as a hydraulic excavator or a wheel loader, a so-called rigid seat is used, in which an operator's seat is attached to the floor of an operator's cab. However, to improve driving comfort and reduce operator fatigue, a work vehicle has been developed in which a mechanical suspension, air suspension, or similar device is arranged between the operator's seat and the floor. In the Japanese patent application with publication number 2021-123122 (Patent document 1) discloses a device for suppressing horizontal vibrations, capable of actively suppressing horizontal vibrations of an operator's seat in a vehicle. Patent document 1 discloses that the operation of a fluid pressure actuator is controlled by actuating a two-way switching valve arranged between a fluid pressure supply source and the fluid pressure actuator, based on information about horizontal vibrations acting on a seat. BIBLIOGRAPHY Patent literature Patent document 1: JP 2021-123122 A BRIEF SUMMARY OF THE INVENTION Technical problem Since the operation of the fluid pressure actuator is always controlled in the technology described in the above publication, the operator experiences discomfort. One objective of the present disclosure is to provide a work vehicle, a system which includes the work vehicle, and a method for controlling the work vehicle, which may reduce the discomfort experienced by an operator during the operation of the work vehicle. Solution to the problem A work vehicle and a system including the work vehicle according to the present disclosure each include an operator seat, a vibration suppression device, a locking mechanism, a sensor, and a controller. The vibration suppression device suppresses lateral movement of the operator seat. The locking mechanism switches between locking and unlocking the operation of the vibration suppression device. The sensor detects vibration information about lateral vibration of the operator seat. The controller switches between locking and unlocking the vibration suppression device by the locking mechanism based on a comparison between the vibration information detected by the sensor and preset vibration baseline information for isolation operation. A method for controlling a work vehicle of the present disclosure is a method for controlling a work vehicle which includes an operator seat, a vibration suppression device which suppresses movement of the operator seat in a lateral direction, and a locking mechanism which switches between locking and unlocking an operation of the vibration suppression device, and includes the following steps. Vibration information about the lateral vibrations of the operator's seat is recorded. The operation of the vibration suppression device is switched between locked and unlocked by the locking mechanism based on a comparison between the recorded vibration information and preset basic information for isolation operation. Advantageous effects of the invention The present disclosure may implement a work vehicle, a system which includes the work vehicle, and a method for controlling the work vehicle, which may reduce the discomfort experienced by an operator during the operation of the work vehicle. BRIEF DESCRIPTION OF THE DRAWINGS 1 Figure 1 is a side view illustrating a configuration of a wheel loader as an example of a work vehicle according to an embodiment of the present disclosure.2 is a diagram that shows a configuration of a system that makes a work vehicle a concludes, illustrated in one embodiment of the present disclosure.3 is a top view illustrating a configuration of an exemplary locking mechanism used in a system that includes a work vehicle in an embodiment of the present disclosure.4 is a side view illustrating a configuration of an exemplary locking mechanism used in a system that includes a work vehicle in an embodiment of the present disclosure.5 is a top view illustrating a configuration of another exemplary locking mechanism used in a system that includes a work vehicle in an embodiment of the present disclosure.6 is a side view illustrating a configuration of another exemplary locking mechanism used in a system that includes a work vehicle in an embodiment of the present disclosure.7 is a diagram illustrating functional blocks of a control system used in a system that includes a work vehicle in an embodiment of the present disclosure.8 is a flowchart showing a method for controlling a work vehicle in an embodiment of the present disclosure. DESCRIPTION OF EXECUTION FORMS One embodiment of the present disclosure is described below with reference to the drawings. In the patent specification and drawings, identical or corresponding components are designated with identical reference numerals, and redundant descriptions are not repeated. Configurations may be omitt