Motion Guide Device Flange Fitting for Resin Leakage
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Solution Overview
Problem
Conventional motion guide devices with integrally formed retainer members and direction changing paths via insertion molding face challenges in ensuring smooth connections and preventing resin protrusions, leading to increased manufacturing complexity and costs.
Innovation Solution
The motion guide device incorporates flange portions with fitting portions on the movable member, allowing for the assembly of direction changing path members, which ensures a smooth connection between the loaded rolling member surface and the direction changing path without the need for grinding, thereby simplifying the manufacturing process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If retainer member and direction changing path constituting member are integrally formed with movable member by insertion molding, then manufacturing efficiency is improved, but resin leakage onto loaded rolling member rolling surface occurs
Solution Approach 1:
The direction changing path constituting member is divided into separate sections: an inner peripheral side direction changing path constituting member and an outer peripheral side direction changing path constituting member. This segmentation allows the inner peripheral side member to be positioned away from the loaded rolling member rolling surface, preventing resin leakage while maintaining the benefits of integral formation for other components.
2Manufacturing precision
If inner peripheral side direction changing path constituting member is arranged near edge portion of loaded rolling member rolling surface, then smooth connection is achieved, but resin burr generation increases
Solution Approach 1:
By segmenting the direction changing path constituting member into inner and outer peripheral side members, the inner peripheral side member can be positioned to provide smooth connection without being so close to the loaded rolling member rolling surface as to cause resin burr generation during insertion molding.
3Reliability
If multiple constitutional members are used in motion guide device, then functional requirements are met, but assembling procedure complexity increases
Solution Approach 1:
The retainer member is integrally formed with the movable member through insertion molding, combining multiple functional components into a single integrated structure. This reduces the number of separate parts and simplifies the assembling procedure while maintaining all necessary functions including rolling member retention and direction changing capabilities.
Data Source
AI summary
The motion guide device includes a track member in which a rolling member rolling surface is formed along a longitudinal direction thereof, a movable member which is reciprocally movable with a number of rolling members being interposed therebetween and which is provided with a loaded rolling member rolling surface constituting a loaded rolling member rolling path opposing to the rolling member rolling surface and a rolling member return path, and a lid member provided with a pair of direction changing paths for connecting both end portions of the loaded rolling member rolling path and the rolling member return path to thereby constitute an endless circulation path. Flange portions are formed to both end portions of the movable member in the reciprocally moving direction by means of insert molding, and the flange portions are provided with fitting portions formed to end portion sides of the movable member.