Ratchet Wrench Actuator Resisting Spring Assembly

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional ratchet wrench structures have complex assembly processes due to numerous components, making manufacturing and assembly inconvenient and costly, with an unideal structural design that complicates the control and change of rotation direction.

Innovation Solution

A simplified ratchet wrench actuator structure featuring a ratchet wrench with a head and shank part, a ratchet member, a clamping piece, and a change-over switch utilizing a resisting spring with intensive and sparse spring coils for resilient resistance, eliminating the need for additional components like springs, resisting caps, and steel balls, allowing for easier assembly and cost-effective production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple components (first spring, resisting cap, steel ball, second spring) are used to control rotation direction, then the positioning and resistance function is achieved, but the assembly process becomes complicated and time-consuming

Engineering Contradiction:

Improvepositioning functionVSAvoidassembly process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple components (first spring, resisting cap, steel ball, second spring) into a single integrated resisting spring structure. The resisting spring includes a front resisting part, middle spring part, and rear resisting part that work together to provide both positioning and resistance functions, eliminating the need for separate components and simplifying assembly.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The resisting spring serves multiple functions simultaneously: it provides resilient resistance through its spring coils, enables positioning through the front and rear resisting parts, and eliminates the need for separate positioning components. This multi-functional design reduces device complexity while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple components are used to control rotation direction, then the positioning function is achieved, but manufacturing cost increases

Engineering Contradiction:

Improvepositioning functionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges multiple discrete components into a single resisting spring structure, reducing the total number of parts that need to be manufactured, inventoried, and assembled. This integration reduces manufacturing complexity and cost while maintaining the positioning function.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts and eliminates unnecessary components (resisting cap, steel ball, separate springs) from the design, keeping only the essential resisting spring structure that provides all necessary functions. This reduction in component count directly lowers manufacturing cost.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of manufacture

If a tapered buried hole (big at front, small at back) is used for the accommodation hole, then the spring can be installed, but manufacturing becomes difficult and time-consuming

Engineering Contradiction:

Improvespring installationVSAvoidmanufacturing process

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

Instead of using a tapered hole that is difficult to manufacture, the patent inverts the approach by using a through-hole configuration where the resisting spring passes through the driven part. This allows for simpler drilling and machining operations while still achieving proper spring installation and positioning.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent segments the accommodation hole into a through-hole configuration that passes completely through the driven part, allowing the resisting spring to be installed from one side and positioned by its front and rear resisting parts. This segmentation simplifies the manufacturing process compared to creating a complex tapered blind hole.

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

The solution enables convenient and economic manufacturing and assembly, providing better operation feeling and firmness, extending the service life and enhancing product competitiveness by simplifying the assembly process and reducing component costs.

Implementation Method 1

a resisting spring, which is installed in said accommodation hole and has a front resisting part at a front end of said resisting spring, a middle spring part at a middle part of said resisting spring, and a rear resisting part at a rear end of said resisting spring

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS9522460B2Ratchet wrench actuator structure

Publication Date: 2016.12.20 WANG YEO MING

AI summary

A ratchet wrench actuator structure has a head part and a shank part, said head part has a first accommodation section, a second accommodation section, and a third accommodation section; a ratchet member is positioned in said first accommodation section; a clamping piece is disposed in said second accommodation section; a change-over switch has at least one driven part disposed in said third accommodation section; and a resisting spring has a front resisting part, a middle resilience part, and a rear resisting part.