Tractor Frame Engine Mounting for Vibration Isolation

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Solution Overview

Problem

Existing agricultural vehicle frame constructions either face increased complexity in engine maintenance, weight penalties, or inadequate vibration isolation due to the engine being integral to the chassis, or they require additional space for front loader attachments.

Innovation Solution

The engine block is mounted to the transmission housing and front frame section with a design that allows easy disassembly, lightweight construction, and minimal relative movement, using bolts for attachment and a separate oil sump housing, with a mounting bracket that simplifies assembly and maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the engine block forms an integral part of the frame (block concept), then the number of parts is reduced and the front frame is more compact, but disassembly of the frame for maintenance of the engine becomes more complex

Engineering Contradiction:

Improvenumber of partsVSAvoiddisassembly complexity

Core Design Contradiction:

Device complexityVSEase of repair

Solution Approach 1:

The invention divides the frame into a front frame section and a transmission housing that are separable. The engine block is mounted to both, allowing the engine to be accessed by separating the front frame section from the transmission housing, thus maintaining modularity while reducing part count compared to fully integral designs.

Inventive Principle:

Principle #1Segmentation

2Shape

If the engine block forms an integral part of the frame (block concept), then the front frame is more compact, but the weight of the construction is increased as the engine must be designed to be very stiff

Engineering Contradiction:

Improvefront frame compactnessVSAvoidconstruction weight

Core Design Contradiction:

ShapeVSWeight of moving object

Solution Approach 1:

The frame is segmented into separable front frame section and transmission housing, allowing the engine block to be lighter as it doesn't need to serve as the entire structural chassis. The compactness is achieved through the mounting arrangement rather than engine stiffness.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If the engine block forms an integral part of the frame (block concept), then the number of parts is reduced, but additional strain is applied to the engine block as it forms part of the structural chassis

Engineering Contradiction:

Improvenumber of partsVSAvoidengine block strain

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The separable frame design allows the engine block to be supported by dedicated frame sections rather than bearing all structural loads alone. The mounting brackets distribute loads appropriately, reducing strain on the engine block while maintaining a simplified overall structure.

Inventive Principle:

Principle #1Segmentation

4Device complexity

If the engine block forms an integral part of the frame (block concept), then the number of parts is reduced, but the concept is less effective at isolating engine vibrations from the chassis

Engineering Contradiction:

Improvenumber of partsVSAvoidvibration transmission

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The engine block is extracted from being an integral structural component and mounted separately via mounting brackets. This separation allows vibration isolation measures to be implemented at the mounting points, reducing vibration transmission to the chassis while maintaining structural integrity.

Inventive Principle:

Principle #2Taking out (Extraction)

5Device complexity

If the engine block forms an integral part of the frame (block concept), then the number of parts is reduced, but attachment means for a front loader must be integrated into the oil sump or require additional frame section

Engineering Contradiction:

Improvenumber of partsVSAvoidfront loader attachment flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The separable front frame section allows attachment means for front loaders to be integrated into the front frame section itself, providing flexibility and adaptability without requiring modifications to the engine block or oil sump.

Inventive Principle:

Principle #1Segmentation

6Ease of repair

If the mounting uses flexible connections between chassis and components (frame concept), then the engine can be easily disassembled, but the relative movement between engine and chassis necessitates complex flexible connections

Engineering Contradiction:

Improveengine disassemblyVSAvoidconnection complexity

Core Design Contradiction:

Ease of repairVSDevice complexity

Solution Approach 1:

The frame is segmented into separable front frame section and transmission housing with rigid mounting brackets, eliminating the need for flexible connections while maintaining ease of engine disassembly through the separable frame sections.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP2891568B1Tractor frame

Publication Date: 2020.01.01 AGCO INT GMBH

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AI summary

An agricultural vehicle (10) having an engine (12) mounted on a chassis (11), the chassis including a transmission housing (16, 18) and a front frame section (14). The engine (12) includes an engine block (26) fixed to the chassis (11). The engine block is fixed to the front frame section (14) only at a front end (32) of the engine block, and the engine block (26) is fixed to the transmission housing (16, 18) only at a rear end (36) of the engine block.