Roller Holder Retainer Extraction for High-Speed Wear Reduction
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Solution Overview
Problem
Conventional roller holders for screw shafts and linear motion guide devices experience excessive abrasion and wear due to the impact of rolling elements on interposing portions or retainers, leading to quick degradation when moving at high speeds.
Innovation Solution
A roller holder design featuring two parallel longitudinal rods with couplers forming compartments, where retaining devices are attached to the rods' inner surfaces and positioned on the sides of the rolling members, preventing direct impact and ensuring the retainers are not between the rolling elements, thus reducing abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retainers are disposed between the rolling elements to retain them in position, then the rolling elements can be held in place, but the retainers will be impacted and scraped by the rolling elements at high speeds causing excessive wear and quick degradation
Solution Approach 1:
The patent removes the retainers from the harmful position between the rolling elements. Instead of having retainers disposed between rolling elements (which causes impact and scraping), the rolling elements are retained by the configuration of the rods and couplers structure itself, extracting the retainers from the wear-causing location while preserving their retention function.
Solution Approach 2:
Instead of having retainers actively hold rolling elements from between them, the invention inverts the approach by having the rolling elements naturally constrained by the structural configuration of alternating rods and couplers, where the rolling elements are retained by the spaces created by this alternating arrangement rather than by separate retainer components.
2Productivity
If the roller holder moves at high speed between two moving members, then productivity is improved, but the rolling elements will impact onto the retainers causing increased abrasion and scraping
Solution Approach 1:
The patent extracts the retainers from the path of the rolling elements, eliminating the harmful impact and scraping that occurs at high speeds. The rolling elements move freely between the alternating rods and couplers without contacting any retainer components, allowing high-speed operation without the wear problems that plague conventional designs.
3Reliability
If interposing portions are connected between connecting portions to retain balls or rolling bodies, then the rolling members can be held in position, but the interposing portions will be quickly worn out due to scraping and impact
Solution Approach 1:
The patent eliminates the interposing portions (retainers) from the system by using the alternating rods and couplers structure to directly retain the rolling members. The rolling members are held in position by the geometric configuration of the structure rather than by separate interposing retainer components, removing the source of wear and extending component lifespan.
Data Source
AI summary
A roller holder includes a number of couplers disposed between two longitudinal rods for coupling the rods together and for forming a number of compartments to receive rolling members, and two retaining devices disposed in each compartment of the roller holder and attached to the rods for retaining the rolling members in the compartments and between the rods and the couplers of the roller holder, and for preventing the retaining devices from being impacted by the rolling members, the retaining devices each include a projected portion located above the rods and a protruded portion located below the rods and the couplers for engaging with the rolling members.