Orthogonal Roller Retaining Member for Dual-Row Guide Assembly
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Solution Overview
Problem
Existing movement guide devices require multiple roller retaining members to retain roll balls, leading to complex assembly operations and increased component count.
Innovation Solution
A movement guide device with a roller retaining member featuring a plate-shaped retaining portion that extends orthogonally to the support body, capable of retaining both upper and lower rows of rollers simultaneously, reducing the number of required members and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple roller retaining members are used to retain upper and lower rows of rollers simultaneously, then the retention reliability is improved, but the device complexity and number of components increase
Solution Approach 1:
The patent combines multiple retaining functions into a single integrated roller retaining member. This member includes an upper retaining arm for the upper row of rollers and a lower retaining arm for the lower row of rollers, both extending from a common base. This merging of functions reduces the total number of components while maintaining the reliability of retaining both rows of rollers simultaneously.
Solution Approach 2:
The roller retaining member is designed as a multi-functional component that performs multiple retention tasks. The single member simultaneously retains both upper and lower rows of rollers, making it a universal retaining solution that replaces what would traditionally require separate retaining members for each row.
2Reliability
If multiple roller retaining members are used to retain rollers, then the retention capability is improved, but the assembling operations become complicated
Solution Approach 1:
By merging the retention of upper and lower roller rows into a single retaining member with multiple arms, the assembly process is simplified. Instead of installing multiple separate retaining members, the operator only needs to install one integrated component, reducing assembly complexity while maintaining full retention capability.
3Ease of manufacture
If a plate-shaped roller retaining portion extending orthogonally is used, then the manufacturing ease is improved, but the structural complexity may increase
Solution Approach 1:
The roller retaining member is segmented into distinct functional arms (upper retaining arm and lower retaining arm) that extend orthogonally from a plate-shaped base. This segmentation allows each arm to be optimized for its specific retention function while maintaining manufacturability through standard plate fabrication techniques.
Solution Approach 2:
The retaining arms extend in orthogonal directions from the plate-shaped base, utilizing three-dimensional spatial arrangement. This dimensional approach allows the single member to access and retain both upper and lower roller rows simultaneously, achieving complex retention functionality through simple orthogonal extensions that are easy to manufacture.
Data Source
AI summary
A movement guide device comprises: a support body formed with two roller rolling grooves in each of two side surfaces thereof; a moving body assembled onto the support body to freely move along the support body, and having a load roller rolling groove provided opposite to the roller rolling groove to form a load path together with the roller rolling groove; rollers arranged such that lines forming a contact angle with respect to the roller rolling groove intersect at a position outside the support body; and a roller retaining member arranged between two row of rollers, the moving body comprises a main moving body and cover bodies mounted at two ends of the main moving body; in the movement guide device, the roller retaining member comprises a roller retaining portion, formed in a plate shape extending in a length direction of the support body, and orthogonal to the length direction.