Ratchet Gear Transmission for Low-Friction Reciprocating Drive

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Solution Overview

Problem

Existing kinetic energy transmission systems converting reciprocating lever action to unidirectional rotary motion are inefficient due to high energy consumption from friction, complex mechanisms, and increased production and maintenance costs, making them bulky and difficult to compact.

Innovation Solution

A kinetic energy transmission system comprising a reciprocating actuator with a swing lever and a direction-conversion mechanism using a bidirectional driving gear with ratchet teeth and clutches to convert reciprocating motion into uninterrupted unidirectional rotary motion, minimizing friction and complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If belts and drag elements are used to convert reciprocating motion to rotary motion, then unidirectional rotary output is achieved, but friction losses increase and energy efficiency decreases

Engineering Contradiction:

Improveenergy efficiencyVSAvoidfriction losses

Core Design Contradiction:

Use of energy by moving objectVSLoss of energy

Solution Approach 1:

The patent replaces the belt-drag element friction-based mechanism with a direct gear engagement mechanism. The bidirectional driving gear engages directly with the output gear through tooth-to-tooth contact, eliminating the need for belts and drag elements that cause friction losses. This substitution of mechanical transmission method significantly reduces energy loss and improves efficiency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If many elements including belts, wheels, gears and capstans are used, then motion conversion is achieved, but production and maintenance costs increase

Engineering Contradiction:

Improveproduction costVSAvoidnumber of elements

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent merges multiple functions into fewer components. The bidirectional driving gear combines the functions of motion reversal and torque transmission that were previously handled by separate belts, wheels, and capstans. The clutch mechanism integrates the function of directional control without requiring additional complex assemblies, thereby reducing both production and maintenance costs.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bidirectional driving gear serves multiple functions simultaneously: it reverses motion direction, transmits torque, and controls power delivery to the output shaft. This multi-functional design eliminates the need for separate dedicated components for each function, simplifying the overall mechanism and reducing manufacturing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If many elements are used in the mechanism, then motion conversion capability is achieved, but system complexity increases and space occupation increases

Engineering Contradiction:

Improvemotion conversion capabilityVSAvoidsystem complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent integrates the motion reversal and power transmission functions into a compact gear-based system. The bidirectional driving gear and output gear work together in a single integrated mechanism, eliminating the need for separate belts, wheels, and capstans. This merging of functions reduces system complexity while maintaining full motion conversion capability.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of operation

If many elements are used in the mechanism, then motion conversion is achieved, but space occupation increases making compact design difficult

Engineering Contradiction:

Improvemotion conversion functionVSAvoidspace occupation

Core Design Contradiction:

Ease of operationVSVolume of moving object

Solution Approach 1:

The patent consolidates multiple motion conversion functions into a single compact gear assembly. The bidirectional driving gear and output gear are positioned in close proximity, eliminating the need for space-consuming belts and intermediate wheels. This merging approach enables a compact design that maintains full motion conversion functionality while occupying minimal space.

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

The system achieves higher efficiency and economic value by reducing friction losses and simplifying the mechanism, allowing for a compact design with improved energy output and reduced maintenance needs.

Implementation Method 1

a bidirectional driving gear (24) rotatably mounted about a transmission shaft (21a) and having a plurality of forward-rotation ratchet teeth (241) annularly formed on a first (or front) wheel surface (242) of the bidirectional driving gear (24), and having a plurality of reverse-rotation ratchet teeth (243) annularly formed on a second (or rear) wheel surface (244) of the bidirectional driving gear (24)

Methodology Applied

Scientific EffectRatchet mechanism: Ratchet

Data Source

PatentEP3825577B1Kinetic energy transmission system for converting reciprocating input motion to unidirectional rotary output motion

Publication Date: 2022.06.15 HUNG JEN CHE

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AI summary

A kinetic energy transmission system comprises a reciprocating actuator (100) including a swing lever (11) and a direction-conversion and energy output mechanism (200) which can convert the reciprocating motion input by the reciprocating actuator (100) to a unidirectional output rotary motion and output uninterrupted kinetic energy due to the unidirectional rotary motion, to increase the efficiency and the economic value.