Scroll Compressor Eccentric Shaft Sleeve Limiting Structure
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Solution Overview
Problem
Conventional scroll compressor designs are complex and costly due to the need for multiple parts and intricate machining processes to limit the movement of the eccentric shaft sleeve, which complicates the adjustment of the orbital radius of the orbiting scroll plate and increases manufacturing costs.
Innovation Solution
An orbiting scroll plate driving assembly with a limiting portion on the tail driving shaft and an eccentric shaft sleeve groove, where the limiting portion's protrusion or groove configuration restricts the circumferential and axial movement of the eccentric shaft sleeve, simplifying the assembly and machining process by using a mortise joint structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional limiting structures (pin and hole with elastic silencing member) are used to confine the eccentric shaft sleeve, then the circumferential movement is limited, but the number of parts increases and the structure becomes complicated
Solution Approach 1:
The patent combines the circumferential limiting function and axial limiting function into a single integrated limiting structure. The limiting structure includes a limiting ring and limiting block that work together as one unit to confine the eccentric shaft sleeve in both circumferential and axial directions, eliminating the need for separate pin-hole assemblies and reducing the total number of parts.
Solution Approach 2:
The limiting structure serves multiple functions simultaneously: it provides circumferential limiting through the limiting ring, axial limiting through the limiting block, and incorporates shock absorption through the elastic silencing member integrated into the limiting block. This multi-functional design reduces the need for separate components for each function.
2Reliability
If separate circumferential and axial limiting structures are provided for the eccentric shaft sleeve, then the movement is properly confined, but the machining process and assembly process become complicated
Solution Approach 1:
The patent merges the circumferential limiting function and axial limiting function into a single integrated limiting structure. The limiting structure includes a limiting ring and limiting block that work together as one unit to confine the eccentric shaft sleeve in both circumferential and axial directions, eliminating the need for separate pin-hole assemblies and reducing the total number of parts.
Solution Approach 2:
Instead of adding separate limiting structures for each direction of movement, the patent inverts the approach by designing the limiting structure to be integrated from the beginning. The limiting ring and limiting block are designed as a unified system that inherently provides both circumferential and axial confinement, simplifying the overall design and manufacturing process.
3Reliability
If an eccentric shaft sleeve is used to adjust the orbital radius of the orbiting scroll plate, then the reliability of the compressor is improved, but the structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent combines the circumferential limiting function and axial limiting function into a single integrated limiting structure. The limiting structure includes a limiting ring and limiting block that work together as one unit to confine the eccentric shaft sleeve in both circumferential and axial directions, eliminating the need for separate pin-hole assemblies and reducing the total number of parts.
Solution Approach 2:
The patent incorporates an adjustable limiting structure that allows the orbital radius to be dynamically modified. The limiting block can be repositioned along the tail driving shaft, and the limiting ring can be adjusted to change the circumferential limitation, enabling dynamic adjustment of the eccentric shaft sleeve's movement range and thus the orbital radius of the orbiting scroll plate.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An orbiting scroll plate driving assembly provided by the present application includes a main shaft (7), a tail driving shaft (6), and an eccentric shaft sleeve (5). The tail driving shaft (6) is eccentrically connected to the main shaft (7), and the eccentric shaft sleeve (5) is rotatably sleeved on the tail driving shaft (6). The orbiting scroll plate driving assembly further includes a limiting portion (14). The limiting portion (14) is disposed on the tail driving shaft (6), and provided with a first limiting portion protrusion (141). The eccentric shaft sleeve (5) is provided with an eccentric shaft sleeve groove (51). The first limiting portion protrusion (141) is correspondingly inserted into the eccentric shaft sleeve groove. A circumferential size of the eccentric shaft sleeve groove (51) is larger than a circumferential size of the first limiting portion protrusion (141). By providing the limiting portion (14) on the tail driving shaft (6), and providing a mortise joint structure between the limiting portion (14) and the eccentric shaft sleeve (5), the circumferential movement and axial movement of the eccentric shaft sleeve (5) can be confined, and the assembly and processing are simple. Further, a scroll compressor is disclosed.