Vehicle Seat Side Frame Bracket Layout for Recliner Shaft Clearance
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Solution Overview
Problem
Existing vehicle seat frame designs face challenges in easily attaching actuators without interfering with reclining mechanism shafts, require a reduction in components, maintaining stable positional relations during welding, ensuring rigidity, and accommodating loads from armrest rotation.
Innovation Solution
A seat frame configuration with a side frame and reclining mechanism where the actuator is attached to an attachment bracket that avoids the reclining mechanism shaft, integrated with a connection frame to reduce components, and features a C-shaped attachment bracket for stable welding and improved rigidity, including a bent portion to enhance load handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reinforcement bracket is bonded to the side frame to ensure rigidity, then the structural stability is improved, but the shaft for driving the reclining mechanism may interfere with the reinforcement bracket
Solution Approach 1:
The side frame is divided into multiple segments: the main side frame body, a separate reinforcement bracket, and a shaft assembly. The reinforcement bracket is designed as a distinct component that can be attached to the side frame without interfering with the shaft's rotation path, thereby segmenting the structural reinforcement function from the moving shaft assembly.
Solution Approach 2:
A reinforcement bracket serves as an intermediary component between the side frame and the shaft assembly. It provides structural support to the side frame while being positioned and shaped to avoid interfering with the shaft's rotational movement, thus mediating between the need for rigidity and the need for shaft clearance.
2Device complexity
If the number of components is reduced to simplify the structure, then the device complexity is decreased, but the ease of attaching the actuator without interfering with the shaft is compromised
Solution Approach 1:
The actuator attachment function is merged with the side frame structure itself. The side frame is designed to directly accommodate and secure the actuator in a position that avoids shaft interference, eliminating the need for separate attachment brackets or complex positioning mechanisms. This merging simplifies the overall component count while maintaining ease of attachment.
3Manufacturing precision
If the welding area is set to stabilize the positional relation between the bolt and shaft, then the manufacturing precision is improved, but the ease of manufacture is reduced
Solution Approach 1:
The side frame and reinforcement bracket are designed with pre-determined welding areas and positioning features that ensure stable positional relationships between components. These preliminary design decisions about welding locations and component geometries facilitate precise assembly while maintaining ease of manufacture through standardized welding procedures.
4Strength
If the rigidity of the reinforcement bracket is increased to stabilize the bonded state, then the strength is improved, but the interference with the actuator during attachment is increased
Solution Approach 1:
The reinforcement bracket is designed with non-uniform properties: it has high rigidity in regions where structural support is needed, while maintaining clearance and appropriate geometry in regions where actuator attachment occurs. This local differentiation of properties allows the bracket to provide necessary strength without interfering with actuator installation.
Data Source
AI summary
A bracket for attaching an actuator is easily bonded to a side frame while avoiding interference with a shaft for driving a reclining mechanism. In a seat side frame which is provided at each of both ends of a seat back frame in the width direction, a reclining mechanism, and an actuator, the reclining mechanism is attached to a side wall of the side frame, and the actuator is fixed to an attachment bracket bonded to an inner surface of a portion to which the reclining mechanism is attached in the side wall in the width direction. An upper portion which is disposed above the attachment portion of the reclining mechanism and a lower portion which is disposed below the attachment portion thereof are connected to each other at the rear ends thereof and are separated from each other at the front ends thereof.