Gap Adjustment Member With Protrusions Prevents Axis Misalignment
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Solution Overview
Problem
Existing gap adjustment members face challenges in assembly properties and axis misalignment when mounted between an impeller and a drive shaft, leading to reduced contact area and potential falling during assembly.
Innovation Solution
A gap adjustment member with a main body diameter less than or equal to the mounting hole, featuring radially outward protrusions and recessed grooves, is designed to be inserted vertically without inclining, with a virtual circumscribing circle diameter matching the annular groove, and inward protrusions for improved alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the gap adjustment member is mounted by inserting a protrusion into a keyway while inclined obliquely with respect to the mounting hole, then the assembly process can be completed, but the assembly properties deteriorate due to the difficulty of alignment and insertion
Solution Approach 1:
The recessed groove is pre-formed in the mounting hole to guide the protrusion of the gap adjustment member during insertion. This preliminary structural preparation enables the component to be inserted vertically without oblique inclination, significantly improving assembly properties while maintaining a relatively simple mounting structure
2Reliability
If the inner hole diameter of the gap adjustment member is set to anticipate axis misalignment, then the reliability of maintaining contact area is improved, but the contact area between the gap adjustment member and the drive shaft end surface decreases
Solution Approach 1:
The recessed groove structure provides preliminary guidance and constraint during the assembly process, preventing axis misalignment before it occurs. By addressing the misalignment issue proactively through the guiding groove rather than compensating for it afterward through oversized holes, the invention maintains both full contact area and reliability
Data Source
AI summary
A gap adjustment member includes a main body and an outward protrusion. The main body portion has a diameter less than or equal to the diameter of a mounting hole. The outward protrusion protrudes outwardly on an outer perimeter surface of the main body portion, the number of the protrusions being less than or equal to the number of recessed grooves. A diameter of a circumscribing circle, which circumscribes the main body portion and passes a projecting end of the protrusion, and a crossing point, in which a line that passes the projecting end and a center of the main body portion intersects the outer perimeter surface of the main body portion, and which is a crossing point on the opposite side of the projecting end, is configured to be greater than the diameter of the mounting hole and less than or equal to the diameter of an annular groove.