Compressor Body Assembly With Self-Locking Connection Pin
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Solution Overview
Problem
Existing compressors face issues with loose nut connections due to vibrations, leading to increased labor and material costs, and require time-consuming assembly processes.
Innovation Solution
A connection pin with a body section, head section, and bottom section, featuring flexible arms and a spring mechanism, allows secure and quick attachment of the lower and upper bodies without nuts, damping vibrations and ensuring stable assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bolt-nut connection is used to attach the lower body and upper body, then the connection strength is sufficient, but the assembly process becomes time-consuming and the nut loosens over time due to vibrations
Solution Approach 1:
The invention extracts and eliminates the nut from the connection system, retaining only the bolt (connection pin). The simplified connection pin with integrated head and threaded body section removes the separate fastening element, reducing assembly steps while maintaining connection strength and preventing loosening through the elastic arm mechanism.
Solution Approach 2:
Instead of using a traditional bolt-nut pair where the nut is tightened onto the bolt, the invention inverts the approach by making the connection pin itself the fastening element. The elastic arm bends during insertion and locks the connection pin in place, eliminating the need for separate fastening operations.
2Reliability
If a bolt-nut connection is used, then the connection is secure, but special fixtures are required which increase labor and raw material costs
Solution Approach 1:
The invention removes the requirement for special fixtures by eliminating the nut and associated mounting hardware. The connection pin can be directly inserted through aligned channels in the lower and upper bodies without requiring specialized fixture equipment, thereby reducing both labor and raw material costs.
Solution Approach 2:
The connection pin merges multiple functions into a single component: it provides the fastening action, the alignment guide through its body section, and the locking mechanism through the elastic arm. This consolidation eliminates the need for separate fixtures and reduces the number of parts required.
3Reliability
If multiple connection members are used, then the connection is more secure, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The invention combines the functions of multiple connection members (bolts, nuts, washers, and fixtures) into a single integrated connection pin. The pin's body section provides alignment, the threaded portion provides fastening, and the elastic arm provides locking, all in one component that simplifies the assembly process.
Solution Approach 2:
The connection pin is designed as a universal fastening element that performs multiple functions simultaneously: alignment through its body section, fastening through the threaded portion, and locking through the elastic arm mechanism. This multi-functionality reduces the number of separate components needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The connection pin provides secure, rapid assembly, reduces production and labor costs, and enhances the compressor's operational performance by preventing loosening and noise.
Implementation Method 1
The head section comprises at least one arm which is formed in a flexible manner so as to be compressed while the body section is passed through the channels from the head section and to return to the initial shape thereof as the body section pass through the channels and the head section leaves the channels
Implementation Method 2
at least one spring is disposed between the lower casing and the lower body, and on the connection pin, there is at least one holding section which extends from the bottom section toward the lower body and whereon the spring is seated
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The present invention relates to a compressor (1), which is suitable to be used in household appliances, preferably in cooling devices, comprising a lower casing (2); an upper casing (3) which is disposed on the lower casing (2) and which is joined to the lower casing (2) along a peripheral rim (4); a lower body (5) which is arranged on the lower casing (2) and whereon motor components such as crankshaft and piston are disposed; and an upper body (6) which is placed on top of the lower body (5).