Synchronizing Ring Driver Ring Segmentation

Solution Overview

Problem

Existing synchronization devices in change speed gears face challenges in producing synchronizing rings using powder metallurgy due to material stress and oil displacement issues, particularly with inwardly facing drivers having low wall thicknesses.

Innovation Solution

The drivers are provided on a separate sheet-metal pre-cut driver ring, allowing for the production of the ring body as a sintered body without excessive stress, and enabling radial gaps for improved oil displacement and cooling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If drivers are integrated into the synchronizing ring body with low wall thicknesses, then the structure is compact and space-efficient, but the material stress increases and powder metallurgy production becomes impossible

Engineering Contradiction:

Improvespace utilizationVSAvoidmaterial stress resistance

Core Design Contradiction:

Volume of moving objectVSStrength

Solution Approach 1:

The synchronizing ring is divided into two separate components: the ring body and the driver ring. This segmentation allows the ring body to be produced by powder metallurgy while the driver ring is separately manufactured and attached, resolving the contradiction between compact structure and material stress resistance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The driver ring is attached to the ring body to form an integrated assembly that combines the advantages of both separate production methods. The merged structure maintains compact space utilization while distributing material stress across two separately optimized components.

Inventive Principle:

Principle #5Merging (Combining)

2Device complexity

If drivers are integrated into the synchronizing ring body, then the structure is simplified, but oil displacement from gaps between components is obstructed

Engineering Contradiction:

Improvestructural simplicityVSAvoidoil displacement capability

Core Design Contradiction:

Device complexityVSEase of manufacture

Solution Approach 1:

By separating the driver ring from the ring body, radial gaps are created between the two components. These gaps facilitate oil displacement during operation, resolving the contradiction between structural simplicity and oil displacement capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The radial gaps between the driver ring and ring body create a porous-like structure that allows oil to flow through and be displaced effectively, improving lubrication and cooling without requiring a complex integrated design.

Inventive Principle:

Principle #31Porous materials

3Productivity

If powder metallurgy is used for ring body production, then manufacturing efficiency and cost are improved, but the process cannot accommodate drivers with low wall thicknesses under stress

Engineering Contradiction:

Improvemanufacturing efficiencyVSAvoiddriver stress resistance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The synchronizing ring is divided into two separate components: the ring body and the driver ring. This segmentation allows the ring body to be produced by powder metallurgy while the driver ring is separately manufactured and attached, resolving the contradiction between compact structure and material stress resistance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The driver ring is attached to the ring body to form an integrated assembly that combines the advantages of both separate production methods. The merged structure maintains compact space utilization while distributing material stress across two separately optimized components.

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

This solution simplifies production, reduces material stress, and enhances oil flow and cooling by allowing for the use of powder metallurgy in ring body production while ensuring effective force transmission between the ring body and driver ring.

Implementation Method 1

ring body consisting of a sintered body

Methodology Applied

Scientific EffectSintering: Sintering

Implementation Method 2

friction surface on the inner circumference as well as radially inwardly facing drivers for the friction ring

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS7717247B2Synchronization device for a change speed gear

Publication Date: 2010.05.18 MIBA SINTER AUSTRIA GMBH

AI summary

A synchronization device is described for a change speed gear, comprising at least one cone clutch which comprises a double cone ring (10) which is freely rotatable relative to a hub (1) between an inner friction ring (8) and an outer synchronizing ring (9) which is axially displaceable relative to the friction ring (8) and which comprises a ring body (15) with a stop gearing (14) on the outer circumference and a friction surface (17) on the inner circumference as well as radially inwardly facing drivers (13) for the friction ring (8). In order to provide advantageous constructional conditions it is proposed that the drivers (13) are provided on a driver ring (16) made of at least one sheet-metal pre-cut part which is joined to the ring body (15) consisting of a sintered body.