Portable Blower Pipe Connection Design to Reduce Wear and Wobbling
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Solution Overview
Problem
Conventional portable blowers face weight increase issues due to enlarged main body from higher pressure and volume requirements, leading to increased operator burden and potential wobbling or removal of the blowout pipe when using fiber-reinforced resin fan cases.
Innovation Solution
A portable blower design featuring a fiber-reinforced resin fan case with a slidably connected bent pipe base portion and a wear-resistant slide-contact-receiving member to prevent wobbling and removal of the blowout pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the fan case is made of fiber-reinforced resin of low specific gravity to reduce weight, then the weight of the main body is reduced, but the connection between the outlet port and the pipe base portion becomes easily worn due to sliding motion
Solution Approach 1:
The invention divides the connection structure into three distinct components: the outlet port of the fan case, the pipe base portion, and the slide-contact-receiving member. This segmentation allows each component to be optimized independently - the fan case can use lightweight fiber-reinforced resin while the slide-contact-receiving member provides dedicated wear resistance at the sliding interface.
Solution Approach 2:
The slide-contact-receiving member acts as an intermediary component between the outlet port and the pipe base portion. It receives the sliding motion of the pipe base portion and protects both the outlet port and pipe base portion from direct wear contact, thereby preventing shaving and maintaining connection reliability.
2Ease of operation
If the pipe base portion is connected slidably to allow direction changes, then the ease of operation is improved, but the connection becomes prone to wear and wobbling
Solution Approach 1:
The slide-contact-receiving member serves as a mediator that enables the sliding motion necessary for easy operation while simultaneously protecting the connection from wear. It provides a dedicated wear-resistant surface that accommodates the pipe base portion's movement without compromising connection stability.
Solution Approach 2:
The invention changes the material parameter of the slide-contact-receiving member to be wear-resistant, specifically addressing the wear issue caused by sliding motion. This material parameter change allows the connection to maintain stability while still permitting the necessary directional adjustments during operation.
3Productivity
If the blowout pipe diameter is increased to increase air flow volume, then the productivity is improved, but the device complexity and weight increase
Solution Approach 1:
The invention changes the material parameter of the fan case to fiber-reinforced resin of low specific gravity, which reduces the weight of the main body. This allows for increased blowout pipe diameter and air flow volume without proportionally increasing the overall weight, thus improving productivity while controlling device complexity.
Data Source
AI summary
Provided is a portable blower including a portable main body in which a pipe base portion of a blowout pipe is connected to an outlet port of a fan case, wherein, the fan case is formed of a fiber-reinforced resin of low specific gravity, the pipe base portion has a bent shape and is connected slidably to a pipe connecting portion of the outlet port, and a slide-contact-receiving member that is formed of a wear-resistant material is attached to the pipe connecting portion at a slide-contact point of the pipe base portion.