Injection-Molded Linear Slide Assembly With Low Part Count
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Solution Overview
Problem
Existing linear slide mechanisms are complex, costly, and sensitive to contamination and misalignment, often requiring multiple metal parts and bushings, which increases production costs and part count complexity.
Innovation Solution
An injection molded slide actuator assembly with a frame, slide carrier, and slide track member, designed to minimize part count by using three injection molded components and two fasteners, eliminating the need for expensive bushings and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional linear slide mechanisms use multiple metal parts and bushings, then reliability and precision are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple traditional components (frame, slide carrier, guide rails, bushings) into a single integrated injection-molded plastic assembly. The frame and guide rails are merged into one monolithic structure with integrated mounting features and guide surfaces, eliminating the need for separate metal parts and bushings while maintaining structural integrity and sliding functionality
Solution Approach 2:
The injection-molded plastic frame serves multiple functions simultaneously: it provides structural support, acts as the guide rail for the slide carrier, incorporates mounting features for attachments, and includes built-in wear surfaces that replace traditional bushings. This multi-functional design reduces part count while maintaining reliability
2Manufacturing precision
If high precision metal parts are used in linear slide mechanisms, then manufacturing precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the material parameter from metal to injection-molded plastic, which allows for different tolerance approaches. Injection molding inherently provides consistent dimensional accuracy through process control, and the design incorporates tolerance compensation features such as compliant mounting surfaces and adjustment mechanisms that accommodate variations in the molded parts
Solution Approach 2:
The patent uses inexpensive injection-molded plastic parts instead of expensive precision-machined metal components. The plastic parts are designed with built-in tolerance compensation and can be easily replaced if worn, reducing overall manufacturing cost while maintaining adequate precision for the application
3Ease of manufacture
If plastic materials are used for slide mechanism components, then manufacturing cost is reduced, but durability and resistance to contamination deteriorate
Solution Approach 1:
The patent uses engineered plastic materials with enhanced properties, including glass fiber reinforcement for increased strength and stiffness, and low-friction additives for reduced wear. The plastic composition is specifically selected to provide durability comparable to metal while maintaining the cost advantages of injection molding and resistance to corrosion and contamination
Data Source
AI summary
An injection molded slide actuator assembly which has a frame, a slide carrier and a slide track member. The injection molded slide actuator has an X, Y, and Z axis with the slide track member having at least one track slot extending along the y and the Z direction and said slide carrier having at least one cooperating outwardly extending side members for engaging the at least one track slot.