Vehicle Seat Height Adjustment Multi-Link Mechanism
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Solution Overview
Problem
Conventional vehicle seat height adjustment systems do not adequately respond to various passenger postures, resulting in insufficient height adjustment angles and reduced durability due to reliance on a single link mechanism.
Innovation Solution
A height adjustment apparatus featuring a multi-link system with a drive unit and power transmission part that allows the seat cushion frame to be adjusted in upward/downward directions, incorporating a drive mechanism with a rotation link and gear link to change the hip-point of a passenger, and a controller to adjust both height and angle for improved comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single link mechanism is used for height adjustment, then the structure is simple, but the durability is reduced and adjustment angle is insufficient
Solution Approach 1:
The single link mechanism is divided into multiple links (first link, second link, third link, fourth link) that work together in a multi-linkage system. Each link performs a specific function in the height adjustment process, distributing mechanical stress and improving overall durability while enabling greater adjustment angles.
2Device complexity
If a single link mechanism is used, then the device complexity is low, but the height adjustment angle is insufficient
Solution Approach 1:
The multi-link mechanism introduces dynamic movement capabilities with multiple degrees of freedom. The links can rotate and adjust at different angles (first rotation angle, second rotation angle, third rotation angle), allowing the seat cushion to achieve various tilting angles and heights to respond to different passenger postures.
3Ease of operation
If the power transmission part length changes during operation, then the drive mechanism complexity increases, but the height adjustment performance improves
Solution Approach 1:
The power transmission part is designed with variable length capability during operation, allowing it to extend and retract as needed. This dynamic adjustment enables the drive mechanism to achieve greater height adjustment range and control precision, with the length changing in coordination with the multi-link mechanism movement.
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 system provides a desired tilting angle and height adjustment, enhancing seat comfort for diverse passenger postures while improving durability through a stable and efficient link mechanism.
Implementation Method 1
a drive motor fixed to the cushion frame and the power transmission part advancing and withdrawing during an operation of the drive motor
Implementation Method 2
a drive mechanism including a rotation link rotatably provided on a front end of the power transmission part, a first connection bar, each of opposite ends of which is rotatably connected to a connection portion between the first link and the second link and being in contact with a front end part of the rotation link
Implementation Method 3
A guide slot curvedly extended as an arc shape may be provided on the side frame, and a guide part may be provided on a connection portion between the first link and the second link of the height link, and the guide part may be placed in and passes through the guide slot
Data Source
AI summary
The present disclosure relates to a height adjustment apparatus of a vehicle seat, whereby during a height adjustment of a seat cushion, a desired tilting angle of the seat cushion is obtained and heights of a front part and a rear part of the seat cushion are individually adjusted. Due to the height adjustment apparatus, the comfort of a seated occupant is improved by adjusting the angles of the seat cushion in response to various postures of the occupant. In addition, a link connection is structurally secured and thus its durability is also improved.