Work Machine Speed Selector With Variable Tactile Detents
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Solution Overview
Problem
Wheel loaders require adjustable vehicle speed settings for different work types, necessitating a wide range of speed restrictions that can be set in small increments, while also allowing for simple operation.
Innovation Solution
A work machine operation apparatus featuring a base with differently spaced engagement holes and a contact portion that applies biasing force, allowing for selective engagement with various holes to provide distinct operational feedback to the operator, enabling precise vehicle speed adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional switch panel is used for vehicle speed setting, then the structure is simple, but the operational feedback to the operator is insufficient and precision in speed adjustment is limited
Solution Approach 1:
The base is segmented into multiple engagement portions (first engagement portions and second engagement portions) with different dimensions and intervals. The contact portion selectively engages with these segmented positions to provide discrete speed settings, achieving precise vehicle speed adjustment through structural segmentation rather than continuous control
Solution Approach 2:
Different engagement portions are designed with different local qualities - first engagement portions have one dimension and interval spacing, while second engagement portions have different dimensions and interval spacing. This local differentiation provides varied operational feedback for different speed adjustment needs, improving measurement precision without requiring a completely complex system
2Ease of operation
If multiple engagement portions with different intervals are provided, then operational feedback is enhanced, but the device structure becomes more complex
Solution Approach 1:
The base is divided into multiple engagement portions with different dimensional characteristics and spacing intervals. This segmentation provides the operator with distinct tactile and operational feedback for different speed settings, enhancing ease of operation through clear feedback without requiring electronic displays or complex interfaces
Solution Approach 2:
The single base structure integrates multiple functions by incorporating both first engagement portions and second engagement portions that serve different operational purposes. This multi-functional design enhances operator feedback while avoiding the need for separate devices or complex control systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus provides operators with appropriate operational feedback, allowing them to easily recognize and adjust vehicle speed settings, enhancing the operational experience by differentiating engagement states through tactile feedback.
Implementation Method 1
a biasing portion configured to apply to the contact portion biasing force in a direction in which the contact portion is brought in contact with the base
Data Source
AI summary
A work machine operation apparatus that appropriately provides an operational feeling to an operator is provided. A base includes a plurality of first holes each having a first dimension. The base includes a plurality of second holes each having a second dimension different from the first dimension. An interval at which two adjacent first holes are arranged is different from an interval at which two adjacent second holes are arranged. A contact portion is in contact with the base. The contact portion can move relatively to the base and can selectively be engaged with any one of the plurality of first holes and the plurality of second holes. A biasing portion applies to the contact portion, biasing force in a direction in which the contact portion is brought in contact with the base. Upon accepting an input operation, an operational input portion moves the contact portion relatively to the base.