Sanitary Fitting Axial Gap Adjustment via Rotating Fastening Ring
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Solution Overview
Problem
Conventional concealed sanitary fittings face challenges in maintaining a consistent axial gap between the handle and the rosette across varying installation depths, leading to unattractive and variable gaps due to the discrete nature of the valve spindle's toothing and the need for on-site adjustments.
Innovation Solution
A concealed sanitary fitting design featuring a fastening ring with a central passage that allows the valve spindle to protrude, enabling adjustable axial positioning and fixing with a grub screw, allowing the handle to be assembled with a defined gap dimension regardless of the installation situation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the valve spindle is factory-made with excess length and cut to length on site, then the installation depth can be adapted, but the axial gap between handle and rosette becomes unattractive and variable
Solution Approach 1:
The valve spindle is designed with continuous adjustability in the fastening region, allowing dynamic positioning at any axial location rather than fixed discrete positions. This enables precise adjustment of the handle-rosette gap while adapting to different installation depths, resolving the contradiction between adaptability and precision.
Solution Approach 2:
The fastening part is designed to be adjustable along the axial direction of the valve spindle, changing the positional parameter continuously rather than in discrete steps. This allows the axial gap between handle and rosette to be precisely controlled at any desired dimension, maintaining manufacturing precision while accommodating various installation depths.
2Shape
If the handle diameter is made the same as or smaller than the rosette diameter for aesthetics, then the aesthetic appearance is improved, but the axial gap becomes unattractive and variable with conventional fastening
Solution Approach 1:
The fastening part allows dynamic axial adjustment to compensate for the reduced handle diameter, enabling precise control of the axial gap between handle and rosette. This maintains aesthetic appearance while ensuring consistent, attractive spacing regardless of the handle-rosette diameter relationship.
3Ease of manufacture
If the fastening part is fixed at discrete positions determined by grooves, then the manufacturing is simplified, but the axial gap cannot be precisely controlled
Solution Approach 1:
The fastening part is designed with continuous adjustability along the valve spindle's axial direction, replacing fixed discrete positioning with a dynamic adjustment mechanism. This allows precise control of the axial gap dimension while maintaining ease of manufacture through a straightforward fastening structure that can be positioned anywhere along the adjustable range.
Data Source
Figure 1
Figure 2~3
AI summary
The fitting (1) has a fastening part i.e. fastening ring (18), which is rotationally arranged on an outer end region of a valve spindle (5). A handle (25) is rotationally connected with the fastening part. The fastening part comprises a support (19), and the valve spindle is axially, displaceably and rotationally accommodated in the support. The fastening part comprises a fastening element i.e. stud screw (22), and the fastening part is fixed on the valve spindle in axial positions by the fastening element. The fastening part comprises a locking element i.e. locking nose (23).