Modular Bevel Gear Transmission Skeleton Housing

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Solution Overview

Problem

Conventional modular bevel gear transmissions with die-cast housings require additional production effort, compromise stability, and risk oil leaks due to the need for a cover, which complicates installation and hygiene concerns.

Innovation Solution

A modular bevel gear transmission design featuring a one-piece inner housing with an outer skeleton structure connected via webs, eliminating the need for a cover, allowing for efficient production and increased rigidity without undercuts, and enabling easy cleaning and assembly of pre-assembled shaft units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a cover is provided to allow insertion of the bevel gear, then the bevel gear can be mounted in the housing, but the installation opening requires additional production effort, reduces housing stability, and increases leak risk

Engineering Contradiction:
Improvemounting capabilityVSAvoidhousing stability
Core Design Contradiction:
Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The housing is divided into an inner housing and an outer housing that are connected via webs, creating a segmented structure that eliminates the need for a separate cover while maintaining mounting capability and structural stability

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The housing structure transitions from a conventional single-piece design with a cover opening to a multi-dimensional skeleton design with webs connecting inner and outer housings, allowing gear insertion through the web structure without compromising overall stability

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

2Ease of manufacture

If a cover is provided for gear insertion, then mounting is enabled, but additional production effort is required

Engineering Contradiction:
Improvemounting capabilityVSAvoidproduction efficiency
Core Design Contradiction:
Ease of manufactureVSProductivity

Solution Approach 1:

The mounting function previously requiring a separate cover is merged into the housing structure itself through the web design, eliminating the need for additional cover components and reducing production steps

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The housing is segmented into inner and outer parts connected by webs, allowing the gear to be mounted through the web openings without requiring a separate cover component, thereby simplifying production

Inventive Principle:
Principle #1Segmentation

3Ease of manufacture

If a cover is provided for gear insertion, then mounting is enabled, but the risk of oil escaping due to leaks increases

Engineering Contradiction:
Improvemounting capabilityVSAvoidseal reliability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The cover component that created leak risks is extracted from the design, replacing it with a web-based structure that provides mounting capability without the sealing problems associated with traditional covers

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The housing is segmented into web structures that provide mounting openings without requiring separate cover components, thereby eliminating the seal interfaces that cause leaks

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP2479454B1Series of conical gear transmissions
Publication Date: 2013.11.13 GETRIEBEBAU NORD GMBH & CO
  • EP2479454B1 patent drawingFigure 1~2
  • EP2479454B1 patent drawingFigure 3~4

AI summary

The gear box (1) has a transverse bearing bore provided for a drive bearing of a driven shaft at two sides of bevel gears and set in a drive side chamber. The driven shaft is guided transverse to a drive shaft, and an electric motor (99) directly acts on or over an intermediate stage (9). An inner housing (4) is made of cast material and connected with an outer housing (2) in skeleton construction over bars (3, 3') without a cover. The bars are extended toward the driven shaft and bound with a smooth-walled through-hole (5). A longitudinal bearing hole arranges the bore in one of the bars.