Clamping Device Link Arm Mechanism for Sewing Interference
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Solution Overview
Problem
Conventional sewing apparatuses for instrument panels face interference between the sewing mechanism and pressing jigs, leading to incomplete sewing, and have complex configurations with separate drive mechanisms for positioning and pressing units, increasing manufacturing costs.
Innovation Solution
A clamping device with a cylinder, base body, and link arms that allow simultaneous clamping from two directions using a single driving force, featuring a movable plate and holding pins to securely hold the workpiece from orthogonal surfaces, reducing the complexity and cost of the sewing apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressing jig is used to press and support the skin sheet, then the workpiece can be held securely, but the sewing mechanism interferes with the pressing jig and cannot perform sewing
Solution Approach 1:
The pressing jig is divided into multiple pressing members that can be independently positioned. This segmentation allows the sewing mechanism to access different areas of the workpiece by moving around specific pressing members, resolving the interference problem while maintaining secure holding.
Solution Approach 2:
The pressing members are made movable rather than fixed, allowing dynamic adjustment of their positions. This enables the sewing mechanism to navigate around pressed areas and perform sewing operations on accessible portions of the skin sheet without interference from static pressing structures.
2Adaptability or versatility
If separate drive mechanisms are used for positioning unit and pressing unit, then each unit can be controlled independently, but the number of components increases and configuration becomes complicated
Solution Approach 1:
The drive mechanisms of the positioning unit and pressing unit are merged into a single integrated drive system. This consolidation reduces the number of components and simplifies the overall configuration while still enabling independent control of both units through coordinated operation of the shared drive mechanism.
Solution Approach 2:
The single drive mechanism is designed to perform multiple functions by controlling both the positioning unit and pressing unit. This multi-functional design allows one drive system to replace what would traditionally require two separate drive mechanisms, reducing complexity while maintaining operational versatility.
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 clamping device effectively holds the workpiece from two directions, preventing interference with the sewing mechanism and simplifying the apparatus configuration, thereby ensuring reliable sewing and reducing manufacturing costs.
Implementation Method 1
one end of each of the link arms is pivotally supported by the base body, and another end of each of the link arms is pivotally supported by the first clamping member
Implementation Method 2
when the first clamping member abuts against the workpiece and each of the link arms is tilted in a manner that the another end approaches the base body, the second clamping member moves in a direction orthogonal to the operating direction
Data Source
AI summary
A clamping device includes a cylinder, a base body, a movable plate, and holding pins. The movable plate is attached to the base body substantially parallel thereto via two pairs of link arms. The movable plate moves along the operating direction of the cylinder. The movable plate can abut against a width-direction side surface of a workpiece. The holding pins are attached to the movable plate. The holding pins abut against an upper portion of the workpiece.