Backpack Blower Intake Pipe Cover for Impact Protection
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Solution Overview
Problem
The existing backpack type blowing apparatuses face damage to their intake pipes due to strong impacts when they collide with obstacles, as these pipes are typically made of resin and not adequately protected.
Innovation Solution
A cover is integrated into the backpack type blowing apparatus, fixed to the fan case, which interposes between the cover and the fan case to protect the intake pipe from external impacts, with specific fixed portions positioned on the outer circumference of the intake pipe to absorb and distribute the force of any collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the intake pipe is made of resin and fixed at two positions, then the installation is simple and lightweight, but the pipe may be damaged when it crashes into obstacles
Solution Approach 1:
The fan case is designed with a covering structure that surrounds the intake pipe before impact can occur. This protective covering acts as a cushioning barrier that absorbs and distributes impact forces, preventing direct transmission to the resin intake pipe. The covering is integrated into the fan case structure, providing preemptive protection against obstacles while maintaining the simplicity of the resin pipe installation.
2Reliability
If the intake pipe is covered with a protective structure, then damage resistance is improved, but the device complexity increases
Solution Approach 1:
The protective covering for the intake pipe is merged with the fan case structure, forming an integrated design. The covering is not a separate additional component but is incorporated into the existing fan case, thereby providing protection without significantly increasing device complexity. This merging approach maintains structural simplicity while achieving the desired protection level.
Solution Approach 2:
The fan case serves multiple functions: it houses the fan blades, provides structural support, and simultaneously acts as a protective covering for the intake pipe. This multi-functionality reduces the need for separate protective components, thereby minimizing device complexity while ensuring comprehensive protection for the intake pipe against external impacts.
Data Source
AI summary
A backpack type blowing apparatus includes an intake pipe that connects an air cleaner fixed to a fan case of an air blower to a carburetor that supplies an evaporated fuel to an engine body, and a top cover fixed to the fan case to cover at least the intake pipe by interposing the intake pipe between the top cover and the fan case. The top cover has a plurality of cover fixing portions fixed to the fan case. An outer circumferential-side fixed portion positioned on an outer circumferential side of the intake pipe in the fan case is included in the plurality of cover fixing portions.