Integrated Thread Checking Fixture for Simultaneous Size and Depth Detection

Solution Overview

Problem

Current thread checking fixtures in the automobile industry are complex and costly, making them inefficient for simultaneous size and depth detection of threads.

Innovation Solution

A comprehensive thread checking fixture comprising a no-go end, handle, measuring column, measuring sleeve, and jackscrew, which includes a thread no-go gauge, transition rod, connecting rods, scale bar, thread go gauge, and jackscrew, allowing for precise detection of thread size and depth with a simple structure and low manufacturing cost.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If imported thread checking fixtures are used to simultaneously detect thread size and depth, then detection capability is improved, but device complexity and manufacturing cost increase significantly

Engineering Contradiction:

Improvedetection capabilityVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines thread size detection (using go gauge and no-go gauge) and thread depth detection (using depth scale and measuring sleeve) into a single integrated fixture. The measuring column integrates both the thread engagement gauges and the depth measurement scale, allowing simultaneous detection of both parameters without requiring separate devices.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixture is designed as a multi-functional tool that can detect both thread size compliance (through go/no-go gauges) and thread depth (through the depth scale and measuring sleeve). This universal design eliminates the need for multiple separate detection devices, reducing overall system complexity while maintaining comprehensive detection capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If imported thread checking fixtures are used to simultaneously detect thread size and depth, then detection capability is improved, but manufacturing cost increases significantly

Engineering Contradiction:

Improvedetection capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent combines thread size detection (using go gauge and no-go gauge) and thread depth detection (using depth scale and measuring sleeve) into a single integrated fixture. The measuring column integrates both the thread engagement gauges and the depth measurement scale, allowing simultaneous detection of both parameters without requiring separate devices.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fixture is designed as a multi-functional tool that can detect both thread size compliance (through go/no-go gauges) and thread depth (through the depth scale and measuring sleeve). This universal design eliminates the need for multiple separate detection devices, reducing overall system complexity while maintaining comprehensive detection capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of manufacture

If separate detection methods are used for thread size and depth, then manufacturing cost is reduced, but detection efficiency and productivity decrease

Engineering Contradiction:

Improvemanufacturing costVSAvoiddetection efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent combines thread size detection (using go gauge and no-go gauge) and thread depth detection (using depth scale and measuring sleeve) into a single integrated fixture. The measuring column integrates both the thread engagement gauges and the depth measurement scale, allowing simultaneous detection of both parameters without requiring separate devices.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables simultaneous detection of thread size and depth with high precision, compatibility, and reduced manufacturing costs, simplifying the detection process while maintaining accuracy.

Implementation Method 1

a jackscrew (5), wherein the no-go end (1) includes a thread no-go gauge (11), a transition rod (12) and a connecting rod II (13)... the measuring column (3) includes a connecting rod I (31), a scale bar (32), an open slot (33) and a thread go gauge (34)... the jackscrew (5) is mounted on the measuring sleeve (4), and the top of the jackscrew (5) is matched with the open slot (33)

Methodology Applied

Scientific EffectScrew mechanism: Screw

Implementation Method 2

The sliding sleeve (44) is matched with the scale bar (32), and the matched clearances is 0.005 mm... the position of the top surface (45) of the measuring sleeve (4) on the scale line of the scale bar (32) is observed at the same time, and the depth value of threads can be read

Methodology Applied

Scientific EffectMechanical sliding:

Data Source

PatentUS10551160B2Comprehensive thread checking fixture

Publication Date: 2020.02.04 CITIC DICASTAL CO LTD

AI summary

Disclosed is a comprehensive thread checking fixture, includes a no-go end, a handle, a measuring column, a measuring sleeve and a jackscrew. The checking fixture not only can be used for detecting the size of the detected threads, but also can be used for detecting the depth of the detected threads, and has the characteristics of simple structure, high detection precision, strong compatibility, low manufacturing cost and the like at the same time.