Thread Testing Device Non-Rotating Scale Reading
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Solution Overview
Problem
Existing thread testing devices face difficulties in accurately reading the screw-in depth due to rotating scales and complex handling procedures, making it challenging to measure thread depths effectively.
Innovation Solution
A thread testing device with a non-rotating housing and a sliding scale that allows for easy reading through a viewing window, featuring a vernier scale for precise measurements, and a rotary handle that can be locked for enhanced usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the scale rotates when the thread gauge is screwed in, then the thread gauge can be screwed in to measure depth, but the scale becomes difficult to read or requires locking and unscrewing to read
Solution Approach 1:
The device is divided into two independent rotational components: the housing that rotates with the thread gauge, and the scale that remains stationary relative to the housing. This segmentation allows the thread gauge to rotate for measurement while the scale stays fixed for reading, eliminating the need to lock and unscrew the entire assembly.
Solution Approach 2:
The scale is positioned on the housing, which acts as an intermediary between the rotating thread gauge and the stationary reading position. The housing rotates with the thread gauge while the scale remains fixed on it, creating a stable reference frame for reading the measurement without requiring the thread gauge to be locked.
2Measurement precision
If the scale is arranged on the front of the device, then the depth can be read, but the screw-in depth is difficult to read especially since the scales turn when screwing in
Solution Approach 1:
Instead of having the scale rotate with the thread gauge (conventional approach), the invention inverts the relationship by fixing the scale to the housing while allowing the thread gauge to rotate independently. This inversion ensures the scale remains stationary relative to the housing, making it easy to read at any rotation angle.
3Measurement precision
If a vernier scale is used, then measurement precision is improved, but the screw-in depth can only be read with difficulty since the scales turn when screwing in
Solution Approach 1:
The vernier scale is segmented from the rotating thread gauge and is instead fixed on the housing. This segmentation allows the vernier scale to maintain its precision while remaining stationary relative to the housing, enabling easy reading at any rotation angle during the screwing operation.
Data Source
Figure 1
AI summary
The device (1) has screwable thread plug gauges (3), which are rotatably arranged in a housing (2). The housing comprises a measuring scale (7) for displaying screw-in depth of the thread plug gauges. The thread plug gauges are screwed by a rotary handle (4), which is rotated against the housing. The scale with indices with the thread plug gauges is displaceably arranged at the housing, and comprises a viewing window (8) for reading the indices. The rotary handle is designed as a sleeve (6) attached to a rear side of the thread plug gauges.