Multi-function seat actuator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electric rotary actuator driven mechanisms require multiple actuators to control separate functions in applications like seats with floor tracking and swivel control, leading to heavy and complex actuation systems.
Innovation Solution
A multi-function seat actuation system utilizing a single rotary actuator connected to an output interface with primary and secondary output links, where a lost motion slot isolates the secondary function control from the primary function control, allowing independent operation of seat pan track and swivel functions and floor tracking functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple actuators are used to control separate functions (floor tracking, seat pan track, swivel), then each function can be controlled independently, but the actuation system becomes heavy and complex
Solution Approach 1:
A single actuator is designed to perform multiple functions (floor tracking, seat pan track, and swivel control) through different output links. The actuator serves as a universal device that can control different seat functions by engaging different mechanical pathways, eliminating the need for multiple separate actuators while maintaining independent control capability.
Solution Approach 2:
The actuator system is segmented into different output links (primary output link and secondary output link with lost motion slot) that can be independently engaged or disengaged. This segmentation allows the single actuator to control different functions selectively by activating specific output links, providing functional independence without requiring multiple actuators.
2Ease of operation
If multiple actuators are used to control separate functions, then each function can be controlled independently, but the system weight increases
Solution Approach 1:
The single actuator is designed as a multi-functional device that can control floor tracking, seat pan track, and swivel functions through different output links. This universality eliminates the need for multiple separate actuators, significantly reducing the overall weight of the actuation system while maintaining the capability for independent control of each function.
Solution Approach 2:
Multiple actuator functions are merged into a single actuator unit with multiple output links. The primary output link and secondary output link (with lost motion slot) are combined within one actuator housing, allowing different seat functions to be controlled by one integrated actuator rather than multiple separate units, thereby reducing total system weight.
3Device complexity
If a single actuator controls multiple functions, then system complexity and weight are reduced, but the functions may not operate independently
Solution Approach 1:
The actuator system is segmented into distinct output links (primary and secondary) that can be independently engaged or disengaged through the lost motion slot mechanism. This segmentation allows the single actuator to control different functions selectively by activating specific output links, ensuring functional independence is maintained despite using only one actuator.
Solution Approach 2:
The lost motion slot acts as an intermediary mechanism between the actuator and the different output links. It mediates the power transmission by allowing selective engagement of the primary output link or secondary output link, enabling independent control of different functions while using a single actuator.
4Device complexity
If a single actuator controls multiple functions, then system weight and complexity are reduced, but mechanical isolation between functions may be compromised
Solution Approach 1:
The actuator system is segmented into distinct output links (primary and secondary) that are mechanically separated through the lost motion slot design. This segmentation provides mechanical isolation between different functions, ensuring that when one function is active, the other remains disengaged and unaffected, thereby maintaining reliability while using a single actuator.
Solution Approach 2:
The lost motion slot serves as a mechanical intermediary that provides isolation between different output links. It allows the actuator to selectively engage either the primary output link or the secondary output link without transmitting force to both simultaneously, ensuring mechanical isolation and functional independence for reliable operation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A seat actuation control system is disclosed. The seat actuation control system may permit multiple functions to be controlled by a single actuator. For example, a seat floor tracking function, and a seat pan track and swivel function may be individually controlled by a single actuator, such as a rotary actuator