Variable Shaft Spacing for Wear Distribution
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Solution Overview
Problem
The durability of moving body support apparatuses that use a carriage supported by a main shaft and a sub-shaft is compromised due to abrasion in the contact region, especially during frequent reciprocating movements in printing applications, as the contact area with the sub-shaft remains constant, leading to increased wear and tear.
Innovation Solution
The moving body support apparatus design includes a main shaft and a sub-shaft with a varying distance between them along the moving direction, allowing the contact area to change continuously, thereby reducing abrasion by maintaining a parallel support mechanism and ensuring even wear across the contact surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carriage is supported by a main shaft and a sub-shaft with a constant distance between them, then the structure is simple and stable, but the contact region on the sliding portion remains fixed, leading to concentrated abrasion and reduced durability
Solution Approach 1:
The patent applies the dynamics principle by making the distance between the main shaft and sub-shaft variable rather than constant. The sub-shaft is positioned such that the distance changes along the moving direction of the carriage, causing the contact region on the sliding portion to shift dynamically during reciprocating motion. This dynamic adjustment distributes wear across different areas of the sliding portion, preventing concentrated abrasion and improving durability without requiring complex additional components.
2Reliability
If lubricant is supplied to the shaft surfaces, then abrasion is suppressed, but the contact region remains limited to a specific area, leading to uneven wear distribution
Solution Approach 1:
The patent applies the local quality principle by creating different contact conditions at different locations along the shafts. The distance between the main shaft and sub-shaft varies along the moving direction, which means different regions of the sliding portion contact different regions of the shafts at different times during reciprocation. This spatial variation in contact quality ensures that wear is distributed evenly across the entire sliding portion surface, complementing the lubrication effect and enhancing overall abrasion resistance.
Data Source
AI summary
A moving body support apparatus including a main shaft, a sub-shaft that is arranged to be spaced from the main shaft, and a carriage that moves along the main shaft while causing a contact surface to be in contact with the sub-shaft is provided. A distance between the main shaft and the sub-shaft changes along a moving direction of the moving body. A printing apparatus including the moving body support apparatus is also provided.