Electromagnetic Commutating Assembly for Ratchet Direction Switching

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Solution Overview

Problem

Conventional ratchet wrenches require manual operation to switch the direction of the control member, making it inconvenient in narrow or hard-to-reach work areas and prone to foreign matter intrusion, leading to abrasion of internal structures.

Innovation Solution

An electrically controlled commutating assembly using an electromagnetic unit to change the magnetic field, allowing for remote operation of the control member and eliminating the need for internal structural modifications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual operation is used to switch the control member direction, then the structure is simple, but the operation convenience deteriorates in narrow work areas

Engineering Contradiction:

Improveoperation convenienceVSAvoidstructure complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the manual mechanical switching operation with an electromagnetic actuating mechanism. The electromagnetic unit generates magnetic field changes that automatically actuate the control member to switch between first and second directions, eliminating the need for manual intervention while maintaining structural feasibility through modular integration.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system achieves automatic self-actuation where the electromagnetic unit responds to operational conditions and automatically switches the control member direction without external manual input. The control member is designed to be actuated by the electromagnetic field changes, creating a self-service mechanism that improves operational convenience.

Inventive Principle:

Principle #25Self-service

2Productivity

If manual switching of control member is required, then the device structure remains compact, but time is lost in taking tool out for commutating

Engineering Contradiction:

Improveoperational efficiencyVSAvoidtime for commutating operation

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The electromagnetic actuating mechanism enables continuous operational capability by eliminating the need to stop and manually switch directions. The control member can be switched between directions while the tool remains in position, maintaining continuous useful action and preventing interruption of the operational workflow.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

By replacing manual mechanical switching with electromagnetic actuation, the system eliminates the time-consuming manual commutating process. The electromagnetic unit can rapidly switch the control member direction without requiring the operator to remove the tool from the work area, significantly reducing time loss.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If control member structure is exposed for manual switching, then ease of manual operation is maintained, but reliability deteriorates due to foreign matter intrusion

Engineering Contradiction:

Improvestructural reliabilityVSAvoidmanual switching ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces manual mechanical switching with an electromagnetic actuating system that operates enclosed within the tool housing. The electromagnetic unit and control member are positioned to be actuated without exposure to the external environment, preventing foreign matter intrusion while maintaining the ability to switch directions effectively.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The electromagnetic field acts as an intermediary that transmits the switching command without requiring physical exposure of the control member. The magnetic field can penetrate the housing structure to actuate the control member from the inside, eliminating the need for exposed mechanical switching components.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 efficient and reliable direction switching of the power tool without manual intervention, reducing exposure to foreign matter and enhancing operational convenience in confined spaces.

Implementation Method 1

an electrically controlled commutating assembly having an electromagnetic unit; the electromagnetic unit being capable of changing a magnetic field to change a position of the control member of the control unit

Methodology Applied

Scientific EffectElectromagnetic field: Electromagnet

Data Source

PatentUS11833642B2Power tool with electrically controlled commutating assembly

Publication Date: 2023.12.05 TECHWAY INDAL

AI summary

The invention relates to a power tool with an electrically controlled commutating assembly comprising: an electrically controlled commutating assembly and a control unit; the electrically controlled commutating assembly has an electromagnetic unit; the electromagnetic unit is capable of performing a change in displacement due to electromagnetic action; the control unit has a control member, the control member is capable of changing a working direction of a power tool, and displacement of the electromagnetic unit is capable of actuating the control member of the control unit to make the power tool switch the working direction.