Air Compressor Motor Snap-Fit Fixation Without Screws
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Solution Overview
Problem
Conventional air compressor motor fixation using screws is unreliable over time and fails when the cylinder length exceeds a certain limit, preventing secure attachment.
Innovation Solution
A connection structure that engages multiple through orifices of the motor with posts on the base, utilizing symmetrical arcuate retainers and hooks to securely fix the motor without screws, with the magnetic coil segments interacting with the retainers and hooks for stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple screws are used to fix the motor on the base, then the motor can be attached to the base, but the screws are removed easily after a period of use time
Solution Approach 1:
The patent replaces the screw-based mechanical fastening system with a snap-fit engagement system. The motor base includes positioning protrusions that engage with corresponding positioning凹槽 on the compressor body, creating a tool-free, screwless connection that eliminates the reliability issues associated with screw loosening over time.
Solution Approach 2:
The motor base is segmented into multiple components including positioning protrusions, retaining clips, and elastic elements. This segmentation allows for modular assembly where each component performs a specific function: positioning protrusions for alignment, retaining clips for secure attachment, and elastic elements for maintaining engagement force throughout the service life.
2Reliability
If multiple screws are used to fix the motor on the base, then the motor can be attached to the base, but the motor cannot be fixed when the cylinder length is too long
Solution Approach 1:
The snap-fit fixation system is designed with universal adaptability to accommodate different cylinder lengths. The positioning protrusions and retaining clips are configured to engage with corresponding features on the compressor body regardless of the cylinder length, making the system versatile for various air compressor configurations without requiring length-specific fastening solutions.
3Reliability
If screws are used to fix the motor, then the motor can be attached to the base, but the fixation structure becomes complex
Solution Approach 1:
The patent extracts and eliminates the screw fastening elements from the fixation system, replacing them with an integrated snap-fit mechanism built into the motor base and compressor body. This removal of external fasteners simplifies the overall structure, reduces the number of parts, and eliminates the complexity associated with screw installation and maintenance.
Data Source
AI summary
A connection structure for a motor of an air compressor contains: a base, a cylinder, a motor, and a transmission mechanism. The base includes a first positioning orifice and a second positioning orifice. The cylinder includes an air storage seat. A small-diameter gear is inserted through the first positioning orifice to fit on the motor, a bearing housing is accommodated in the first positioning orifice, and the motor includes a magnetic coil. The transmission mechanism actuates a piston to move in the cylinder reciprocately so as to compress air. The magnetic coil includes a first segment and a second segment, and the base includes two symmetrical elongated plates which respectively have two hooks. The base further includes two symmetrical arcuate retainers.