Transmission Snap Ring Stopper Structure for Easy Disassembly

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Solution Overview

Problem

In transmissions, the lack of a structure to prevent snap ring rotation leads to difficulties in disassembly, risk of damage, and increased time and expense due to the need for additional components like spring pins to maintain the snap ring's position.

Innovation Solution

A transmission design featuring a stopper and rib configuration within the third insertion hole to prevent snap ring rotation, allowing the snap ring to be easily maintained and disassembled, with a simple structure that reduces parts and processing costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If no structure is provided to prevent snap ring rotation, then the transmission structure is simpler, but the snap ring rotates or deviates from its designated position during operation and is difficult to disassemble

Engineering Contradiction:

Improvestructure complexityVSAvoidsnap ring disassembly ease

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The snap ring itself serves as the prevention mechanism by utilizing its own elastic deformation capability. The snap ring's ends are designed to elastically expand and engage with the stopper structure, eliminating the need for separate prevention components while maintaining both operational stability and disassembly ease

Inventive Principle:

Principle #25Self-service

2Ease of operation

If a spring pin is used to prevent snap ring rotation, then the snap ring can be disassembled relatively easily, but additional structures must be formed in the case and the number of parts increases

Engineering Contradiction:

Improvesnap ring disassembly easeVSAvoidnumber of parts

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The stopper structure is merged with the case body as an integrated feature rather than a separate component. The stopper protrusions are directly formed on the case inner surface, combining the functions of case structure and snap ring position prevention into a single element, thereby reducing part count while maintaining ease of disassembly

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If additional structures are added to the case to prevent snap ring deviation, then the snap ring position is maintained, but processing time and expenses increase

Engineering Contradiction:

Improvesnap ring position stabilityVSAvoidcase processing ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The stopper structures are localized to specific positions where snap ring position control is needed, rather than requiring comprehensive structural modifications throughout the case. The stopper protrusions are strategically placed only at critical engagement points, minimizing machining requirements while ensuring reliable snap ring position stability

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12025215B2Transmission with structure for preventing rotation of snap ring

Publication Date: 2024.07.02 NEOOTO

AI summary

The transmission having a structure preventing snap ring rotation includes a first driver including an input shaft configured to receive power from the outside, a second driver arranged apart from the first driver, optionally connected to the first driver, and including an output shaft configured to output power, a third driver arranged between the first driver and the second driver and having one end to which a support bearing is coupled, and a case including a first insertion hole into which the first driver is inserted, a second insertion hole into which the second driver is inserted, a third insertion hole into which the third driver is inserted.