Rolling Guide Scooping Portion Asymmetry
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Solution Overview
Problem
The existing rolling guide devices face issues with scooping piece deformation and reduced durability due to manufacturing and assembly errors, leading to increased rolling resistance and wear, especially at high speeds.
Innovation Solution
The rolling guide device design features a scooping portion formed only on the first half circulation segment of the direction change portion, eliminating the mating surface with the second half segment, thereby preventing deformation and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the scooping piece is divided into two segments along the center line of the inner direction change path, then the circulation path module can be assembled from first half and second half segments, but manufacturing and assembly errors cause steps at the center of the scooping piece, increasing rolling resistance and causing deformation
Solution Approach 1:
The circulation path module is divided into a first half circulation segment and a second half circulation segment along the center line, allowing modular assembly. However, the scooping piece is intentionally kept as a single undivided component on the first half segment to avoid the problems of stepped surfaces and deformation that would result from dividing it.
Solution Approach 2:
The scooping piece is positioned asymmetrically by being formed only on the first half circulation segment rather than being symmetrically divided across both segments. This asymmetric placement eliminates the mating surface at the center line, preventing step formation and deformation while maintaining the modular assembly advantage.
2Ease of operation
If the scooping piece is formed on both first half and second half circulation segments, then rolling elements can be guided into inner direction change path from both sides, but the mating surface between segments creates steps that increase rolling resistance
Solution Approach 1:
The circulation path module is segmented into first half and second half segments for modular assembly, but the scooping piece is concentrated on the first half segment only, creating an asymmetric configuration that eliminates the problematic mating surface while preserving guiding functionality.
3Reliability
If the scooping piece is formed only on the first half circulation segment, then the mating surface with the second half segment is eliminated, but the second half segment must still be designed to interface with the first half
Solution Approach 1:
The circulation path module is divided into first half and second half segments along the center line, enabling modular manufacturing and assembly. The scooping piece is formed only on the first half segment as a single undivided component, eliminating the need for a mating surface at the center line and preventing step formation.
Solution Approach 2:
The second half circulation segment acts as an intermediary that interfaces with the first half segment through a simplified mating surface that does not include the scooping piece. This intermediary segment connects the modular components while maintaining the integrity of the scooping piece on the first half segment.
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
This design ensures smooth motion of the moving member relative to the track member by preventing scooping piece deformation and improving durability, even under high-speed circulation.
Implementation Method 1
a moving member, which is assembled to the track member through intermediation of a large number of rolling elements that roll on the rolling surface
Data Source
AI summary
A rolling guide device is capable of preventing a scooping piece formed on a circulation path module from being deformed along with use over time, and enhancing the durability of the scooping piece, thereby achieving smooth motion of a moving member relative to a track member. A moving member includes: a main body member having load rolling surfaces and return paths for rolling elements; direction change pipes having formed therein inner direction change paths and having inner peripheral guide surfaces of outer direction change paths, respectively; and lid members each being mounted on the main body member and having outer peripheral guide surfaces of the outer direction change paths. Each of the direction change pipes includes: a first half circulation segment and a second half circulation segment; and a scooping portion for guiding the rolling elements into each of the inner direction change paths.