Gear Housing Inner Wall Projections for Stable Oil Containment

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Solution Overview

Problem

Conventional gear systems require significant material and installation space while maintaining stability and preventing oil leakage, which is not environmentally friendly and inefficient.

Innovation Solution

A gear system with a housing part featuring a cylindrical inner wall with radially inward projections, a cuboid outer wall, and a conical sealing surface, allowing for a compact, stable, and oil-tight design that conserves resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the cylindrical inner wall is made with thick wall material, then stability is improved, but material usage and installation space increase

Engineering Contradiction:
Improvehousing stabilityVSAvoidmaterial usage
Core Design Contradiction:
Stability of the object's compositionVSQuantity of substance

Solution Approach 1:

The housing wall is segmented into a thin-walled cylindrical inner wall and separate reinforcing projections that extend radially inward. These projections are distributed around the circumference and provide localized reinforcement without requiring thick walls throughout, thus maintaining stability while reducing overall material usage.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of uniformly thickening the entire cylindrical wall, reinforcing projections are added only at specific locations where structural support is needed. This local reinforcement approach provides necessary stability at critical points while keeping the overall wall thickness minimal, reducing material consumption and installation space.

Inventive Principle:
Principle #3Local quality

2Quantity of substance

If the cylindrical inner wall is made with thin wall material, then material usage is reduced, but stability deteriorates

Engineering Contradiction:
Improvematerial usageVSAvoidhousing stability
Core Design Contradiction:
Quantity of substanceVSStability of the object's composition

Solution Approach 1:

The housing structure is divided into a thin base wall and separate reinforcing projections. This segmentation allows the wall to remain thin for material efficiency while the projections provide discrete reinforcement zones that maintain structural stability where needed.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Reinforcement is achieved by adding structural elements in the radial dimension rather than increasing wall thickness in the axial dimension. The projections extend radially inward from the cylindrical wall, providing stability through a different geometric approach that doesn't consume additional axial space.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Volume of moving object

If the outer wall region is close to the inner wall, then installation space is reduced, but oil leakage risk increases if the outer wall is damaged

Engineering Contradiction:
Improveinstallation spaceVSAvoidoil containment reliability
Core Design Contradiction:
Volume of moving objectVSReliability

Solution Approach 1:

A safety gap is intentionally maintained between the outer wall region and the cylindrical inner wall before any damage can occur. This pre-planned spacing acts as a protective buffer that prevents oil leakage even if the outer wall is compromised, ensuring reliability without requiring the walls to be tightly spaced.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The safety gap between the outer wall and inner wall acts as an intermediary protective zone. This space serves as a mediator that isolates the oil-containing interior from external damage, allowing the walls to be spaced apart for reliability while still fitting within compact installation spaces through efficient geometric arrangement.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Reliability

If a large volume is filled with oil for lubrication, then lubrication effectiveness is improved, but environmental impact and material usage increase

Engineering Contradiction:
Improvelubrication effectivenessVSAvoidenvironmental impact
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The housing employs a compact, efficiently shaped cylindrical inner wall with reinforcing projections that creates an optimized oil containment volume. This thin-walled structure with strategic reinforcement allows for effective oil lubrication with minimal oil volume, reducing environmental impact while maintaining reliable lubrication of gear components.

Inventive Principle:
Principle #30Flexible shells and thin films

Solution Approach 2:

The housing geometry is optimized to achieve effective lubrication with reduced oil volume. By changing the structural parameters of the housing (thin walls with reinforcing projections), the system achieves efficient oil distribution and containment that maintains lubrication effectiveness while minimizing the quantity of oil required, thereby reducing environmental harm.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS12320414B2Gear system having a housing part
Publication Date: 2025.06.03 SEW EURODRIVE GMBH & CO KG
  • US12320414B2 patent drawing
  • US12320414B2 patent drawing
  • US12320414B2 patent drawing

AI summary

A gear system includes a housing part. The housing part has a cylindrical inner wall which radially surrounds the wheel, e.g., toothed part, such as a gear, connected to the output shaft of the gear system for conjoint rotation. On the cylindrical inner wall are formed projections, which are spaced from each other in the circumferential direction, e.g., are spaced from each other at regular intervals, and which project radially inwards and extend axially. For example, the projections are longer in the axial direction than in the circumferential direction and in the radial direction.