Filter Element Assembly With Eccentric Oil-Return Plug Release
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Solution Overview
Problem
The installation and disassembly of filter element assemblies are complex due to the need for precise rotational positioning of the guide piece and oil return plug, leading to potential errors and increased costs due to machining deviations and product scrapping.
Innovation Solution
A connecting piece with a hollowed-out bracket and end disc is used to radially limit the filter element, featuring an eccentric oil return plug that seals the oil return channel during assembly and is easily removed during disassembly, simplifying the installation process without requiring precise rotational adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If precise rotational positioning of the guide piece and oil return plug is required during installation, then the oil return channel can be properly sealed, but the installation process becomes complex and error-prone
Solution Approach 1:
The guide piece is designed with an asymmetric structure featuring a protrusion that must align with a corresponding groove on the oil return plug. This asymmetric geometry ensures that only one rotational position is correct, automatically guiding the operator to the proper alignment without requiring complex procedures or extensive experience. The asymmetric design transforms a complex positioning task into a simple insert-and-align operation.
Solution Approach 2:
The guide piece acts as an intermediary component between the filter element assembly and the oil return plug. It provides the positioning function through its protrusion-groove interface, mediating the connection and ensuring proper alignment. This intermediary structure simplifies the overall assembly process by incorporating the positioning function into a dedicated component rather than requiring direct precision alignment between the filter element and oil return plug.
2Reliability
If the filter element assembly structure is made different from the matched filter assembly, then specific sealing requirements can be met, but the machining process becomes complex and difficult to control
Solution Approach 1:
The sealing function is segmented into two independent components: the guide piece with its positioning protrusion and the oil return plug with its corresponding groove. This segmentation allows each component to be manufactured separately using standard machining processes without requiring complex integrated designs. The protrusion and groove can be machined independently on simple lathes or mills, significantly reducing machining complexity while maintaining reliable sealing.
Solution Approach 2:
The positioning protrusion on the guide piece and the groove on the oil return plug are complementary copies of each other's geometry. This copying approach ensures that the two components fit together precisely without requiring complex custom machining. The simple geometric forms can be easily replicated using standard tooling, making the manufacturing process straightforward and controllable.
3Manufacturing precision
If strict control of component positions during rotation is implemented, then assembly accuracy can be ensured, but machining position deviation increases and products are scrapped
Solution Approach 1:
Instead of requiring the operator to control the rotational position during assembly, the design inverts the approach by having the component geometry itself enforce the correct position. The asymmetric protrusion-groove interface automatically guides the components into the correct alignment as they are assembled, eliminating the need for operator skill or complex positioning procedures. This inversion of the control mechanism from operator-dependent to geometry-dependent dramatically reduces positioning errors and product scrapping.
Data Source
AI summary
The invention discloses a connecting piece, a filter element assembly and a filter, wherein the connecting piece comprises hollow-out bracket and end disc connected with one end of the bracket, the bracket is arranged on the periphery of the filter element in a surrounding manner and is used for radially limiting the filter element, and the outer end face of the end disc is eccentrically provided with oil return plug; Wherein the bracket is provided with connecting part for connecting the filter element, so that the connecting part is moved out together with the filter element in the process of moving out the filter element, the oil return plug is removed, and the oil return channel is opened. According to the scheme, the position of the oil return plug can be adjusted in a rotating mode, and the filter element assembly can be installed without much operation experience.