Rotary Encoder Stator Alignment With a Hollow-Bolt Adjustment Mechanism
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Solution Overview
Problem
Existing position adjustment mechanisms for devices like rotary encoders are limited in versatility, allowing adjustments only in one direction and are difficult to operate, making precise alignment of components such as the stator and rotor challenging.
Innovation Solution
A position adjustment mechanism using a hollow bolt with an outer peripheral screw portion and a nut, combined with a fixing screw, allows the stator to move orthogonally to the fixing screw's axis, facilitated by a tool comprising a first and second socket member for easy manipulation, enabling precise adjustment of the stator's position relative to the device body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional position adjustment mechanism with multiple fasteners is used, then the stator can be fixed to the device body, but the adjustment operation becomes difficult and requires multiple tools
Solution Approach 1:
The patent combines multiple fastening functions into a single integrated hollow bolt structure. The hollow bolt simultaneously provides thread engagement with the device body (via external threads) and receives the fixing screw (via internal hollow structure), eliminating the need for separate fasteners and simplifying the adjustment operation to a single tool interface.
Solution Approach 2:
The hollow bolt serves multiple functions: it acts as a threaded fastener engaging the device body, a guide structure for the fixing screw, and a structural support for the stator mounting. This multi-functional design consolidates what would traditionally require multiple separate components into one universal element.
2Manufacturing precision
If a position adjustment mechanism allows multi-directional movement, then alignment precision is improved, but the device complexity increases
Solution Approach 1:
The mechanism transitions from a static fixed connection to a dynamic adjustable connection. The hollow bolt and fixing screw assembly allows the stator to be positioned in multiple directions (radial and axial adjustments) while maintaining structural integrity, enabling precise alignment without requiring complex multi-axis adjustment mechanisms.
Solution Approach 2:
The adjustment mechanism is segmented into independent functional elements: the hollow bolt provides radial adjustment capability, while the fixing screw provides axial positioning. This segmentation allows each component to handle specific adjustment directions independently, achieving multi-directional alignment precision through simple, modular elements rather than a complex integrated mechanism.
Data Source
AI summary
A rotary encoder includes a rotor, and a stator attached to a device body via a position adjustment mechanism. The position adjustment mechanism includes a hollow bolt having a hollow cylindrical portion as a shaft portion and an outer peripheral screw portion on an outer peripheral surface of the shaft portion that screws into an inner peripheral screw portion provided in a mounting hole of the stator, a nut that screws into the outer peripheral screw portion, and a fixing screw inserted into the hollow cylindrical portion and screwed into the device body. A diameter of the inner surface of the hollow cylindrical portion is set to a dimension that forms a gap between the inner surface and a screw portion of the fixing screw, allowing the stator, which is screwed into the hollow bolt, to move in a direction orthogonal to an axial direction of the fixing screw.