Air Compressor Bearing Fixing Structure to Prevent Idle Rotation
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Solution Overview
Problem
Conventional air compressors with plastic bases are prone to deformation due to the interaction between the piston and bearing, leading to idle rotation and removal of the bearing from its positioning orifice, which reduces the service life of the piston and bearing.
Innovation Solution
The structure incorporates a bearing with a non-circular first ring and a second positioning orifice with a non-circular surrounding face and shoulder, along with a locking mechanism using a screw bolt and connection post, to prevent idle rotation and removal of the bearing, ensuring smooth operation of the piston within the cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional circular bearing and positioning orifice are used, then the structure is simple and easy to manufacture, but the bearing can idle rotate or be removed from the positioning orifice, reducing service life
Solution Approach 1:
The patent applies asymmetry by changing the bearing from a conventional circular shape to an oval shape, and correspondingly changing the positioning orifice from circular to oval. This asymmetric geometry prevents the bearing from idle rotation and removal while maintaining structural simplicity. The oval shape creates a unique fit that eliminates rotational freedom without requiring complex locking mechanisms.
2Weight of moving object
If the base is made of plastic material, then the weight is reduced and manufacturing is easier, but the base softens easily under load, causing bearing deformation and piston offset
Solution Approach 1:
The patent applies local quality by making the positioning orifice and surrounding area in the plastic base substantially the same oval shape as the bearing. This localized geometric matching creates a precise fit that prevents bearing movement and distributes loads more evenly, compensating for the inherent softness of plastic material in the critical bearing support area.
Data Source
AI summary
A structure of fixing a bearing of an air compressor, the air compressor contains: a base, a cylinder, and a transmission mechanism. The base includes multiple positioning orifices, and one of the multiple positioning orifices accommodates a bearing. The cylinder is integrally connected with the base and includes an air storage chamber. The transmission mechanism actuates a piston to move in the cylinder reciprocatingly, thus producing compressed air. The first ring of the bearing is non-circular, and a shape of the one positioning orifice of the base corresponds to the first ring so as to avoid an idle rotation of the bearing in the one positioning orifice of the base or a removal of the bearing from the second positioning orifice.