Collapsible Torque Wrench Demountable Fixing Block

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Solution Overview

Problem

Conventional torque wrenches suffer from structural design flaws that lead to component deformation, increased friction, and the inability to replace individual components independently, resulting in reduced precision and higher replacement costs.

Innovation Solution

A collapsible torque wrench design featuring a demountable fixing block and a soft collar to minimize wear and allow for easy replacement of components, along with a pivot pin system that reduces friction and maintains precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the fixing block is fixed in the tubular body with multiple recessed stripes, then the fixing block is securely attached, but the fixing block is likely to deform and increase friction

Engineering Contradiction:

Improvefixing block attachment strengthVSAvoidtorque value precision

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The fixing block is divided into multiple segments that can be independently assembled into the tubular body. This segmentation allows each segment to be precisely manufactured and fitted, reducing deformation risk while maintaining secure attachment through the combined effect of multiple precision-fitted segments.

Inventive Principle:

Principle #1Segmentation

2Strength

If the fixing block is fixed in the tubular body with multiple recessed stripes, then the fixing block is securely attached, but the frictional force increases and operation smoothness deteriorates

Engineering Contradiction:

Improvefixing block attachment strengthVSAvoidoperation smoothness

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

By segmenting the fixing block into multiple precision-fitted parts, the contact surfaces are optimized to minimize friction while maintaining attachment strength. The segmented structure allows for smoother relative movement between components during operation.

Inventive Principle:

Principle #1Segmentation

3Strength

If the fixing block is fixed in the tubular body with multiple recessed stripes, then the fixing block is securely attached, but the components cannot be separated and reassembled for replacement

Engineering Contradiction:

Improvefixing block attachment strengthVSAvoidcomponent replacement ease

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The fixing block is designed as separable segments that can be individually removed and reassembled. This segmentation enables easy replacement of damaged segments without affecting the entire assembly, while the precision-fitted design ensures secure attachment when reassembled.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fixing block incorporates movable or detachable segments that transition between fixed and removable states. This dynamic design allows the components to be securely attached during operation but easily separated for maintenance and replacement when needed.

Inventive Principle:

Principle #15Dynamics

4Strength

If the rivet is riveted on the casing, then the stop member is firmly located, but the rivet is hard to detach and replacement requires replacing multiple components

Engineering Contradiction:

Improvestop member location strengthVSAvoidstop member replacement ease

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The stop member assembly is segmented into the stop member, rivet, and casing as separate replaceable components. The rivet is designed as a standalone fastener that can be easily removed and replaced, allowing the stop member to be replaced independently without replacing the entire casing assembly.

Inventive Principle:

Principle #1Segmentation

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

Ensures the precision of the torque value by minimizing wear and allowing for independent replacement of damaged components, reducing operational costs and maintaining smooth mechanism operation.

Implementation Method 1

an elastic member 26... Two ends of the elastic member 26 respectively abut against the fixing block 25 and the adjustment member 28

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a front end of the connection rod 16 is pivotally connected with the pivoted end 13 of the shank 12 via a pivot pin 161... a front end of the stop member 20 is pivotally connected with the branch bar 15 via a pivot pin 201

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS10179395B2Collapsible torque wrench

Publication Date: 2019.01.15 KABO TOOL COMPANY

AI summary

A collapsible torque wrench includes: a shank having a drive head at a front end and two pivoted ends at a rear end; a connection rod, a front end of which being pivotally connected with the first pivoted end; a housing having a tubular body and a casing fixedly disposed on one side of the tubular body, the connection rod being relatively slidably fitted in the tubular body; a torque adjustment mechanism being mounted in the tubular body and including a fixing block, the fixing block being mounted in the tubular body by a plurality of pins; and a stop member received in the casing. A front end of the stop member is pivotally connected with the second pivoted end. The fixing block is easily demounted from the tubular body for replacement.