Vibration Isolating Support Structure for Engine-Driven Generator
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Solution Overview
Problem
Engine-driven working machines face challenges in suppressing vibrations without increasing the number of components, which also affects noise reduction and hermeticity.
Innovation Solution
The implementation of a support means that includes a first vibration isolating support portion for the engine, a second vibration isolating support portion for the outer case, and a groove portion that allows the outer case to be fitted, reducing the need for separate components and enhancing hermeticity and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vibration isolating members are provided on the bottom portion of the frame, then vibration of the frame can be suppressed, but the number of components increases
Solution Approach 1:
The patent combines the engine support function and outer case support function into a single integrated support structure. The support structure includes a first support portion that supports the engine and a second support portion that supports the outer case, merging what would traditionally be separate vibration isolating members into one unified component. This reduces the number of components while maintaining vibration suppression capability for both the engine and outer case.
2Object-affected harmful factors
If separate vibration isolating support portions are prepared for the engine and outer case, then vibration suppression is achieved, but the weight of the machine increases
Solution Approach 1:
The support structure integrates multiple support functions into a single component, reducing the total weight compared to using separate vibration isolating members for the engine and outer case. The unified structure eliminates redundant materials while providing comprehensive vibration isolation.
3Ease of operation
If the outer case is opened for assembly, then installation is easier, but hermeticity between inside and outside of the outer case is compromised
Solution Approach 1:
The support structure includes a groove portion that receives a fitting portion of the outer case, creating a nested arrangement where the support structure is inserted into the outer case. This nested configuration enables the outer case to be closed while maintaining hermeticity, as the fitting portion fits precisely into the groove portion to seal the interface.
4Ease of operation
If multiple separate components are used for support, then assembly flexibility is improved, but manufacturing complexity increases
Solution Approach 1:
The support structure is manufactured as a single integrated component with both the first support portion and second support portion formed together. This unified manufacturing approach simplifies production compared to manufacturing separate vibration isolating members, while the modular design with distinct support portions still allows for flexible assembly and installation.
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 effectively suppresses vibrations and reduces noise while minimizing the number of components, achieving both weight reduction and improved hermetic sealing of the engine-driven working machine.
Implementation Method 1
a first vibration isolating support portion that is disposed between the engine and the outer case, and supports the engine, a second vibration isolating support portion that is formed integrally with the first vibration isolating support portion, and supports the outer case
Data Source
AI summary
An engine-driven working machine 10 is a generator where a working unit 15 including an engine 37 and a power generating unit 38 is housed in an outer case 12. A plurality of lower support means 25 are included in the generator 10. The lower support means 25 includes a first vibration isolating support portion 73 disposed between the working unit 15 and the outer case 12, a second vibration isolating support portion 74 formed integrally with the first vibration isolating support portion 73, and a groove portion 75 formed between the first vibration isolating support portion 73 and the second vibration isolating support portion 74. The working unit 15 is supported with the first vibration isolating support portion 73. The outer case 12 is supported with the second vibration isolating support portion 74. A fitting portion 81 of the outer case 12 is fitted to the groove portion 75.