Rolling Guide Scraper Pivot for Tilted Linear Motion
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Solution Overview
Problem
Existing rolling guide devices with scrapers fixed to sliders inhibit stable reciprocal linear movement when the slider is tilted with respect to the track member due to distorted contact forces between the scraper and the inner tracks.
Innovation Solution
A rolling guide device with a scraper having a pressing portion that is turnably attached to a moving member, where the frictional force of the pressing portion with the rolling-body surface is less than the frictional force of the attachment portion with the attachment shaft, allowing for continuous function without inhibiting reciprocal linear movement even when tilted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a scraper is fixed to the slider in the rolling guide device, then dust exclusion and lubricant retention functions are improved, but the reciprocal linear movement of the slider is inhibited when the slider is tilted with respect to the track member
Solution Approach 1:
The scraper is changed from a fixed configuration to a movable one, where the pressing portion can move relative to the slider body through a pressing portion movable configuration. This allows the scraper to dynamically adjust its position and maintain contact with the rolling body rolling surface even when the slider is tilted, thus preserving both the scraping function and the smoothness of reciprocal linear movement.
Solution Approach 2:
The scraper is divided into distinct functional portions: a pressing portion that contacts the rolling body rolling surface and a body portion connected to the slider. This segmentation allows the pressing portion to independently respond to tilting conditions while the body portion remains attached to the slider, resolving the contradiction between maintaining scraping function and ensuring smooth movement.
2Object-affected harmful factors
If the scraper is fixed to maintain contact with the rolling surface, then dust exclusion function is improved, but the contact force becomes distorted when the slider is tilted
Solution Approach 1:
The pressing portion is configured to be movable relative to the slider body, enabling it to dynamically adjust its contact point and orientation with the rolling body rolling surface. This dynamic adjustment maintains proper contact force distribution even when the slider is tilted, preventing both dust intrusion and contact force distortion simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the scraper to function effectively without obstructing the reciprocal linear movement of the moving member with respect to the track member, maintaining dust exclusion and lubricant retention even when the moving member is tilted.
Implementation Method 1
a frictional force of the pressing portion with respect to the rolling-body rolling surface is smaller than a frictional force of the attachment portion with respect to the attachment shaft formed in the moving member
Data Source
AI summary
A rolling guide device includes a track member, a moving member, and a plurality of rolling bodies. Rolling-body rolling surfaces that come into contact with an rolling-body outer circumferential surface of a rolling body are respectively formed in wall surfaces of a pair of wall portions included in the track member facing each other, a scraper including a pressing portion that presses the rolling-body rolling surfaces is turnably installed in the moving member, the scraper includes at least an attachment portion and a pressing portion, and is formed such that a frictional force of the pressing portion with respect to the rolling-body rolling surfaces is smaller than a frictional force of the attachment portion with respect to an attachment shaft formed in the moving member.