Work Vehicle Control Layout With Partitioned Shift and Hoist Levers

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Solution Overview

Problem

Operators of work vehicles face incorrect operations of the elevating/lowering instruction part due to the proximity of the gearshift and hoist lever controls, leading to potential malfunctions of the load-carrying platform.

Innovation Solution

An operation device with a partitioning part that separates the gearshift instruction part and the elevating/lowering instruction part in the forward/rearward direction, preventing accidental activation of the hoist lever during gearshift operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the gearshift instruction part and elevating/lowering instruction part are disposed close to each other for ease of operation, then the operator can easily access both controls, but the hands or fingers may inadvertently touch the elevating/lowering instruction part causing wrong operations

Engineering Contradiction:
Improveease of access to controlsVSAvoidaccuracy of control operation
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The control console is divided into distinct regions using a partitioning part that physically separates the gearshift instruction part and the elevating/lowering instruction part. This segmentation creates clear spatial boundaries between different control functions, allowing operators to access both controls easily while preventing inadvertent contact between fingers and unrelated controls.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A partitioning part is introduced as an intermediary element between the gearshift instruction part and the elevating/lowering instruction part. This intermediary structure serves as a physical barrier that prevents direct contact between the operator's hand/fingers and the elevating/lowering instruction part when operating the gearshift control, thereby eliminating wrong operations while maintaining close proximity for ease of access.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If a space is provided between the gearshift instruction part and elevating/lowering instruction part to prevent wrong operations, then accidental activation is reduced, but the operator must move hands further between operations reducing efficiency

Engineering Contradiction:
Improveprevention of wrong operationsVSAvoidoperational efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

Instead of creating a large linear distance between controls in the forward/rearward direction, the partitioning part creates a vertical or lateral barrier that blocks hand movement in three-dimensional space. This allows the controls to remain close in plan view for efficiency while the partition prevents inadvertent contact by blocking the path of finger movement from below or the side.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The partitioning part segments the control space into distinct zones, allowing each control to be positioned optimally for accessibility while the partition itself occupies minimal space. This segmentation enables close proximity of controls for efficiency while maintaining clear separation for reliability.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS11787291B2Operation device and work vehicle
Publication Date: 2023.10.17 KOMATSU LTD
  • US11787291B2 patent drawing
  • US11787291B2 patent drawing
  • US11787291B2 patent drawing

AI summary

An operation device is an operation device of a work vehicle having a load-carrying platform, which includes a gearshift instruction part configured to change a speed of the work vehicle by being operated in a forward/rearward direction, an elevating/lowering instruction part disposed in front of the gearshift instruction part and configured to operate elevation of the load-carrying platform, and a partitioning part configured to partition a space between the gearshift instruction part and the elevating/lowering instruction part in the forward/rearward direction.