Screwless Motor Fixing Structure in Air Compressor Bodies

Solution Overview

Problem

Conventional air compressors face difficulties in securely fixing the motor to the body due to the challenges of using screws in a limited space, making it hard to maintain the motor's position over time.

Innovation Solution

The air compressor design incorporates a motor with fixing portions extending from its head edge that engage with the body's positioning orifices, eliminating the need for screws, and the accommodation box features columns that align with dissipation holes to prevent motor dislodgment during turnover.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If screws are used to fix the motor on the body, then the motor can be secured to the body, but it becomes difficult to assemble and disassemble in a limited space

Engineering Contradiction:

Improvemotor fixation stabilityVSAvoidassembly difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent removes the screws from the fixation system entirely. Instead of using threaded fasteners that require tools and complex manipulation in limited spaces, the motor casing incorporates integral fixing portions (protrusions) that directly engage with corresponding recesses in the body, eliminating the need for separate fastening components and tool-based assembly

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The fixing portions are integrated directly into the motor casing structure rather than being separate components. The motor body and fixing portions form a unified structure that combines the motor housing and fastening features into a single piece, simplifying both the assembly process and the number of parts required

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If screws are used to fix the motor on the body, then the motor can be secured to the body, but the assembly process becomes time-consuming

Engineering Contradiction:

Improvemotor fixation stabilityVSAvoidassembly time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent removes the screws from the fixation system entirely. Instead of using threaded fasteners that require tools and complex manipulation in limited spaces, the motor casing incorporates integral fixing portions (protrusions) that directly engage with corresponding recesses in the body, eliminating the need for separate fastening components and tool-based assembly

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The fixing portions are pre-formed as integral parts of the motor casing during motor manufacturing. The protrusions and recesses are built into the structure beforehand, so that during assembly, the motor can be directly positioned and engaged with the body without requiring separate fastening operations or tool-based screwing actions

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If the motor is fixed with screws, then the motor can be secured to the body, but the motor may still become loose after prolonged use

Engineering Contradiction:

Improveinitial assembly easeVSAvoidmotor position stability over time

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The fixing portions are integrated directly into the motor casing structure rather than being separate components. The motor body and fixing portions form a unified structure that combines the motor housing and fastening features into a single piece, simplifying both the assembly process and the number of parts required

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Instead of using external fasteners (screws) that attach to the motor from the outside, the patent uses internal structural features where the motor casing itself provides the fixing protrusions. This inverts the traditional approach by making the motor body the active fixing element rather than the passive object being fastened

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS11767836B2Air compressor

Publication Date: 2023.09.26 CHOU WEN SAN

AI summary

An air compressor contains: a body, a cylinder, a motor, and a transmission mechanism. The body includes multiple positioning orifices which are a first positioning orifice and a second positioning orifice. The cylinder is connected on the body and communicates with an air storage holder. The motor is fixed on the body, a small gear is received in the first positioning orifice, and a connection seat of the motor is accommodated in the first orifice. The transmission mechanism actuates the piston to move in the cylinder reciprocately so as to produce compressed airs. The motor further includes multiple fixing portions extending from a head edge of the casing thereof and configured to engage with the body, thus fixing the motor on the body securely without using any screws.