Offset Joystick Handle Layout for Wrist-Rotation Vehicle Control
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Solution Overview
Problem
Existing control sticks for vehicles like telehandlers and skid-steers lack ergonomic design and efficient control mechanisms, particularly in allowing for intuitive wrist rotation and simultaneous control of vehicle and attachment movements, leading to reduced operator comfort and increased operational complexity.
Innovation Solution
The development of an offset control stick system with a housing, motion sensor, and an offset handle that forms a gap with the shaft, enabling wrist rotation and simultaneous control of vehicle and attachment movements through a T-BAR control system with L-shaped safety bars, allowing for intuitive control and reduced operator strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional control stick with a handle aligned with the shaft axis is used, then the structure is simple and easy to manufacture, but the operator cannot perform intuitive wrist rotation and simultaneous control of vehicle and attachment movements
Solution Approach 1:
The handle is offset from the shaft axis, creating an asymmetric configuration that enables intuitive wrist rotation control. The offset handle allows the operator's wrist to rotate naturally while controlling both vehicle movement and attachment operations simultaneously, resolving the contradiction between operational ease and structural simplicity.
2Adaptability or versatility
If control sticks are provided on opposing sides of the seat, then simultaneous control of vehicle and attachment is enabled, but the control system complexity increases
Solution Approach 1:
Each control stick is designed with multi-functional capability, where the offset handle on each stick can control both vehicle movement and attachment operations. This universal design reduces the need for separate control mechanisms, allowing simultaneous control while managing system complexity through functional integration.
3Ease of operation
If the handle is offset from the shaft axis forming a gap, then ergonomic wrist rotation is enabled, but the manufacturing precision requirements increase
Solution Approach 1:
The control stick is segmented into distinct components: the shaft, the offset handle, and the connecting mechanism. This segmentation allows for modular manufacturing where each component can be produced separately with standard tolerances, then assembled to achieve the required offset configuration, reducing overall manufacturing precision requirements while maintaining operator comfort.
Data Source
AI summary
A joystick controller is provided that has a housing and a correlated output device supported within the housing. A socket has a shaft and a base. As the shaft is moved, the base interacts with the correlated output device to control a vehicle and/or an attachment. The operator user grips a handle that is transversely coupled to the shaft at an angle. The joystick has two control axes that provide a rotational feel for the control of the vehicle and/or attachment.