Traction Drive Unit Fastening Element for Transmission Replacement

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Solution Overview

Problem

Existing traction drive systems in motor vehicles, particularly industrial trucks, are inefficient and costly to maintain due to the fixed attachment of the transmission and engine, requiring expensive and time-consuming replacement processes that involve disassembling the vehicle body and gear motor.

Innovation Solution

A traction drive unit where the transmission is attached to a fastening element outside the vehicle housing, allowing for independent exchange of transmission parts, with a common fastening element between the engine and transmission, enabling easier assembly and reduced material costs by using standard components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the transmission is fixedly attached to the engine inside the vehicle housing, then the structural unit is durable and integrated, but the replacement process becomes complex and time-consuming

Engineering Contradiction:

Improvestructural integrationVSAvoidtransmission replacement

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The drive unit is divided into separable components: the engine remains inside the vehicle housing while the transmission is attached to a fastening element outside the housing. This segmentation allows the transmission to be replaced independently without removing the engine or opening the vehicle body, resolving the contradiction between structural integration and ease of repair.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the transmission is designed for long service life with high material costs, then durability is improved, but manufacturing costs increase

Engineering Contradiction:

Improveservice lifeVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The transmission is designed as a replaceable component with moderate service life that can be economically replaced rather than repaired. By positioning the transmission outside the vehicle housing on a fastening element, it becomes an interchangeable part that can be swapped quickly, reducing the need for expensive high-durability materials while maintaining operational reliability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Power

If the transmission is located inside the vehicle housing connected to the engine, then the power flow is direct, but access for maintenance requires opening the vehicle body

Engineering Contradiction:

Improvepower flow efficiencyVSAvoidmaintenance access

Core Design Contradiction:

PowerVSEase of operation

Solution Approach 1:

A fastening element acts as an intermediary between the engine and transmission, allowing the transmission to be positioned outside the vehicle housing while maintaining the power connection. This intermediary component enables direct power flow from the engine to the transmission while providing external access for maintenance without requiring the vehicle body to be opened.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP3769991A1Attachment of a drive unit

Publication Date: 2021.01.27 BREUELL & HILGENFELDT GMBH

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AI summary

In order to create a traction drive unit (100) according to the invention, in particular for a motor vehicle, which comprises a motor (10), in particular an electric motor, a transmission (30) and a fastening element (20), in particular for fastening the traction drive unit (100) to a housing part (15) of the motor vehicle, it is proposed that the fastening element (20) be arranged between the motor (10) and the transmission (30).