Seat Cushion Tipping Module for Ultra-Comfort Position Integration
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Solution Overview
Problem
Existing seat assemblies in automotive vehicles require significant modifications to integrate cushion tipping and legrest mechanisms, and there is a need for enhanced comfort features like the ultra comfort position during prolonged vehicle occupancy.
Innovation Solution
A cushion tipping module and legrest module are integrated into the seat assembly using a motor support bracket, electric motor, lead screw, and threaded nut mechanism to pivot the seat cushion between upright and rearward inclined positions, and a legrest mechanism that can be extended and retracted, with minimal modifications to the existing structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cushion tipping function and legrest mechanism are integrated into existing seat assemblies, then occupant comfort is enhanced, but device complexity increases
Solution Approach 1:
The seat assembly is divided into modular components: a core seat structure and a separate cushion frame module. The cushion frame module contains the cushion tipping mechanism (motor support bracket, electric motor, lead screw, threaded nut, attachment link, transverse tube, lift links) and legrest mechanism as integrated sub-assemblies. This segmentation allows the complex cushion tipping function to be added without redesigning the entire seat, thereby enhancing versatility while managing device complexity through modular architecture.
Solution Approach 2:
The cushion frame module serves multiple functions: it provides cushion tipping between upright and ultra comfort positions, supports the legrest mechanism, and integrates with various core seat structures (front row and rear row seats). The motor support bracket with electric motor and lead screw mechanism simultaneously enables both cushion tipping and legrest deployment, achieving multi-functionality that enhances adaptability without proportionally increasing complexity.
2Adaptability or versatility
If cushion tipping mechanism is added to existing seat assemblies, then ultra comfort position is achieved, but manufacturing complexity increases
Solution Approach 1:
The cushion frame module is pre-assembled as a complete functional unit before integration with the core seat structure. The electric motor, lead screw, threaded nut, attachment link, transverse tube, and lift links are configured and tested as a pre-integrated assembly. This preliminary action allows the complex cushion tipping mechanism to be installed as a single module, significantly reducing assembly integration difficulty and improving ease of manufacture while maintaining full cushion position adjustment capability.
3Ease of operation
If motor support bracket with lead screw mechanism is used for cushion tipping, then precise position control is achieved, but device complexity increases
Solution Approach 1:
The manual mechanical cushion tipping system is replaced with an electromechanical system. The electric motor converts electrical energy to rotational motion, which is then transformed into linear motion by the lead screw and threaded nut mechanism. This substitution provides precise position control through motor control while automating the cushion tipping operation, improving ease of operation. The complexity is managed by integrating these components into a compact motor support bracket assembly that functions as a unified mechanism.
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 solution allows for seamless integration of cushion tipping and legrest functions, providing enhanced comfort and flexibility in seating positions with minimal alteration to the seat assembly, enabling occupants to adjust to ultra comfort positions during vehicle rest or charging.
Implementation Method 1
an electric motor supported by the motor support bracket, a lead screw operatively coupled to the electric motor
Implementation Method 2
a lead screw operatively coupled to the electric motor, and a threaded nut having a threaded passageway extending therethrough meshingly engaged with the lead screw
Data Source
AI summary
A cushion tipping module is configured to be assembled between a seat cushion and a track assembly of a vehicle seat assembly. The cushion tipping module is configured to tip the seat cushion between an upright seating position and a rearward inclined position. The cushion tipping module includes opposing lift links fixedly coupled to distal ends of a transverse tube and configured to be operatively coupled to the seal cushion, an attachment link fixedly coupled to the transverse tube and pivotably coupled to a threaded nut, an electric motor operatively coupled to a lead screw meshingly engaged with the threaded nut, and motor mounting bracket configured to be assembled with the track assembly.