Screwless Air Compressor Motor Locking for Confined-Space Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional air compressors face difficulties in securely fixing and easily removing the motor from the body due to the challenges of using screws in a limited space, making it hard to maintain and assemble.
Innovation Solution
The air compressor design incorporates multiple coupling orifices and locking extensions on the motor and body, allowing secure attachment and easy removal without screws, using a removal tool to press the locking extensions away from the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws are used to fix the motor on the body, then the motor can be securely attached, but it becomes difficult to remove the motor in a limited space
Solution Approach 1:
The locking mechanism is segmented into multiple locking extensions distributed around the motor circumference, each independently engageable with the body. This segmentation allows the removal tool to access and disengage the locking extensions from external sides, facilitating motor removal in limited spaces while maintaining secure attachment during operation.
Solution Approach 2:
A removal tool is introduced as an intermediary device to disengage the locking extensions. The removal tool presses the locking extensions away from the body, enabling motor removal without requiring direct access to screw threads. This intermediary mechanism resolves the contradiction by providing a simple external operation for removal while maintaining strong attachment during normal use.
2Strength
If screws are inserted through the body to screw with multiple threaded orifices of the motor, then secure fixation is achieved, but the complexity of the fixing mechanism increases
Solution Approach 1:
The threading function is extracted from the fixation mechanism. Instead of requiring threaded orifices and screw threads, the locking extensions directly engage with corresponding features on the body. This extraction eliminates the complexity of threading operations while maintaining secure fixation, as the locking extensions provide sufficient holding force without requiring complex threaded connections.
Solution Approach 2:
The screw-thread mechanical system is replaced with a simpler locking extension system. The locking extensions engage with the body through direct mechanical interference or friction fit, eliminating the need for threaded orifices and screw threading operations. This substitution reduces fixing mechanism complexity while maintaining adequate fixation strength for motor attachment.
3Strength
If multiple threaded orifices are used on the motor, then secure attachment is achieved, but tool access for screwing becomes difficult in limited space
Solution Approach 1:
The locking mechanism is inverted so that the locking extensions protrude from the motor outward, with their engagement surfaces facing away from the motor center. This inversion allows the removal tool to access and press the locking extensions from external sides, improving tool accessibility in limited spaces while maintaining secure attachment through the engagement of locking extensions with the body.
4Ease of operation
If locking extensions are used to engage with the body, then the motor can be easily removed, but the attachment strength may be compromised
Solution Approach 1:
Multiple locking extensions are merged around the motor circumference, distributing the attachment strength across multiple engagement points. This merging of multiple simple locking extensions provides cumulative holding force that equals or exceeds traditional screw fixation, while maintaining ease of removal through external pressing of the locking extensions by a removal tool.
Data Source
AI summary
An air compressor is received in an accommodation box and contains a body, a cylinder, a motor, and a transmission mechanism. The body includes 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 is accommodated in the first orifice. The transmission mechanism actuates a piston to move in the cylinder reciprocately so as to produce compressed airs. The motor includes at least one locking extension for engaging the motor with the body, hence the motor is fixed on the body securely without using any screws.