Bearing Support Device Segmented Abutment Machining
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Solution Overview
Problem
The existing support devices for bearings require extensive machining of the bracket and case surfaces to achieve accurate positioning, which increases costs and complexity as the machining area widens.
Innovation Solution
A support device design that reduces the abutting region by using separate flat surfaces for abutment and threaded members to position the bearing, allowing for independent alignment in multiple directions without requiring extensive machining of the bracket's outer surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the entire reference surface and inner surface of the bracket supporting portion are machined to accurately position the bearing, then positioning accuracy is improved, but machining cost and complexity increase
Solution Approach 1:
The bracket supporting portion is divided into multiple separate abutting portions (first bracket abutting portion, second bracket abutting portion, third bracket abutting portion) that contact different abutting portions of the case. This segmentation allows each surface to be machined independently over smaller areas rather than requiring extensive machining of the entire reference surface, thereby reducing machining cost while maintaining positioning accuracy.
2Manufacturing precision
If the machining area is increased to improve bearing positioning accuracy, then positioning accuracy is improved, but machining difficulty increases
Solution Approach 1:
The contact surfaces between bracket and case are segmented into multiple discrete abutting portions distributed at different locations. Each portion requires only localized machining rather than extensive machining of a large continuous area, simplifying the machining process while achieving accurate bearing positioning through the combined effect of multiple contact points.
3Manufacturing precision
If multiple abutting portions are used to position the bearing, then positioning accuracy is improved, but the structure becomes more complex
Solution Approach 1:
The multiple abutting portions on both the bracket and case serve dual functions: they provide precise positioning of the bearing while simultaneously serving as mounting surfaces for securing the bearing housing to the bracket. This multi-functionality reduces the need for separate positioning features, thereby limiting structural complexity despite the use of multiple contact points.
Data Source
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AI summary
A support device (12) for a bearing (10) that rotatably supports a shaft (1) extending in a first direction (D1) includes a case (14) that houses the bearing, and a bracket (16) to which the case is fixed. When the case is fixed to the bracket, a first abutting portion (26) of a case main body (18) is in a state abutting against a first bracket abutting portion (48) of a bracket main body (40) in the first direction, and a second case abutting portion (28, 30) of the case main body (18) is in a state abutting against a second bracket abutting portion (50, 52) of the bracket main body in a second direction (D2) that forms a right angle with the first direction. There is a region where the case and the bracket are separated between the abutting locations of these abutting portions.