Compressor Crankshaft Stopper Prevents Displacement Impact
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Solution Overview
Problem
Compressors mounted in vehicles face the risk of impact from crankshaft displacement during vehicle operation, potentially damaging the compression mechanism.
Innovation Solution
A compressor design featuring a plate-like stopper with a through-hole, consisting of two members, is used to prevent crankshaft displacement by engaging with an annular mounting recessed groove on the crankshaft, ensuring the crankshaft remains stable and preventing impact on the compression mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the compressor is mounted in a vehicle, then the compressor can be used in mobile applications, but the crankshaft may be displaced in the up-and-down direction due to large forces applied during vehicle operation
Solution Approach 1:
A stopper member is introduced as an intermediary component between the crankshaft and the compression mechanism. The stopper includes a through-hole through which the crankshaft passes, and engagement protrusions that engage with engagement recesses on the crankshaft, preventing upward displacement while allowing the crankshaft to rotate freely.
Solution Approach 2:
The stopper is divided into a first stopper member and a second stopper member that can be assembled separately. The first stopper member has engagement protrusions that fit into engagement recesses on the crankshaft, while the second stopper member has a through-hole for the crankshaft to pass through, allowing modular assembly and disassembly.
2Ease of operation
If the crankshaft is allowed to move freely, then the compression mechanism can operate with proper clearance, but the crankshaft may collide with the compression mechanism under large external forces
Solution Approach 1:
The stopper member is pre-installed on the crankshaft with engagement protrusions that engage with engagement recesses, creating a preliminary counteracting force against any upward displacement. This prevents the crankshaft from colliding with the compression mechanism before such collision can occur under external forces.
3Device complexity
If a single-piece stopper is used, then the structure is simple, but the stopper cannot be properly mounted around the crankshaft
Solution Approach 1:
The stopper is segmented into a first stopper member with engagement protrusions and a second stopper member with a through-hole. This segmentation allows the stopper to be assembled around the crankshaft by passing the crankshaft through the second member and securing it with the first member, making mounting feasible while maintaining structural simplicity.
Data Source
AI summary
The present invention discloses a compressor comprising: a vessel; a crankshaft including an annular mounting recessed groove which is formed on its outer circumferential surface; a compression mechanism disposed over the crankshaft, and configured to compress the refrigerant sucked from an outside through rotation of the crankshaft; and a stopper which consists of a first stopper member and a second stopper member, and includes a through-hole which is formed between the first stopper member and the second member. The crankshaft is inserted into the through-hole of the stopper, and the stopper is engaged and fixed on the annular mounting recessed groove.