Vibrating Armature Pump Piston Push-On Anchor
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Solution Overview
Problem
Existing oscillating armature pumps face challenges in reducing manufacturing costs and weight while ensuring a simple and secure connection between the pressure piston element and the anchor element, which are typically made of magnetizable materials.
Innovation Solution
The anchor element is slipped onto the pressure piston element, forming a push-on connection with a radial receptacle, allowing for easy assembly and supporting forces, and the pressure piston element is designed as a plastic injection-molded component with a pressure compensation channel, while the anchor element is a bent sheet metal part, reducing material requirements and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the anchor element is crimped onto the pressure piston element, then a secure connection is achieved, but the manufacturing complexity and production costs increase
Solution Approach 1:
The patent replaces the mechanical crimping connection system with a push-on connection system. The anchor element is simply pushed onto the pressure piston element without requiring crimping tools or complex assembly procedures, thereby reducing manufacturing complexity while maintaining connection reliability through the optimized push-on geometry
2Weight of moving object
If the anchor element has a larger inner bore, then the mass is optimized to avoid vibrations, but the connection security between pressure piston element and anchor element deteriorates
Solution Approach 1:
The patent applies local quality by creating a localized receptacle structure on the pressure piston element that provides concentrated radial positioning and axial retention. This localized feature compensates for the reduced overall contact area resulting from the larger inner bore of the anchor element, maintaining connection security while allowing the optimized mass distribution
3Ease of manufacture
If the pressure piston element is made as a plastic injection-molded component, then production costs are reduced, but the connection strength with the magnetizable anchor element may deteriorate
Solution Approach 1:
The patent employs composite materials by combining plastic (injection-molded pressure piston element) with magnetizable material (anchor element). The design ensures that the plastic component's receptacle provides sufficient mechanical interlocking and radial positioning, while the magnetizable anchor element provides the necessary magnetic coupling strength, achieving both cost reduction and maintained connection strength
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
This configuration simplifies assembly, reduces production costs, ensures reliable operational performance, and allows for efficient pressure equalization, leading to a cost-effective and lightweight oscillating armature pump with improved coupling efficiency.
Implementation Method 1
a magnetic coil (18a, 18b) and a piston (10a, 10b) which is provided for displacing a fluid
Implementation Method 2
an armature element which is designed separately from the pressure piston element and is fixed to the pressure piston element for at least one direction of force, which consists at least partially of a magnetizable material
Data Source
Figure 1
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AI summary
The invention relates to a piston for a vibrating armature pump, in particular for a domestic appliance having a vibrating armature pump, which piston is provided to convey a fluid under the effect of a counterpressure, comprising a pressure piston element (11a; 11b) and an armature element (12a; 12b). The armature element is separate from the pressure piston element (11a; 11b), is rigidly coupled to the pressure piston element (11a; 11b) for at least one force direction, and is at least partially composed of a magnetizable material. The armature element (12a; 12b) according to the invention is put onto the pressure piston element (11a; 11b).