Electromagnetic Switching Device Contact Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic switching devices with a one-piece switching chamber face challenges in isolating main contacts from auxiliary contacts, leading to contact erosion and contamination, which increases manufacturing and assembly costs when ribs are formed on both components.
Innovation Solution
A manufacturing method that includes a one-piece switching chamber with movable contact bridges and separating elements inserted between main and auxiliary contact points, along with main covers to fix these elements, creating a labyrinth effect for enhanced isolation without the need for a two-piece design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ribs are formed on both the switching chamber and the contact bridge carrier to create a double labyrinth, then the isolation between main and auxiliary contacts is improved, but the manufacturing complexity and assembly costs increase
Solution Approach 1:
The separating elements are extracted as independent components that can be inserted into the switching chamber, rather than being integrated into the contact bridge carrier. This allows the contact bridge carrier to remain simple while still achieving effective isolation through the separately inserted elements.
Solution Approach 2:
The isolation function is segmented into separate insertable elements rather than being integrated into the contact bridge carrier structure. This segmentation allows for simpler manufacturing of individual components while maintaining the double labyrinth isolation effect when assembled.
2Ease of manufacture
If the switching chamber is designed as a one-piece structure, then the manufacturing simplicity is improved, but the ability to isolate main contacts from auxiliary contacts deteriorates
Solution Approach 1:
Separating elements are introduced as intermediary components between the main and auxiliary contacts within the one-piece switching chamber. These elements create the necessary isolation without requiring the switching chamber itself to be complex or multi-piece.
Solution Approach 2:
The isolation is achieved by utilizing the third dimension (depth/height) within the one-piece switching chamber structure. Separating elements are inserted vertically or horizontally to create labyrinth paths, adding dimensional complexity without requiring structural complexity in the chamber walls.
3Adaptability or versatility
If separating elements are inserted into the switching chamber after the contact bridge carrier is inserted, then the assembly flexibility is improved, but the assembly time increases
Solution Approach 1:
The contact bridge carrier is prepared in advance with its contact bridges, and the separating elements are pre-positioned or pre-configured. This preliminary preparation allows for faster final assembly while maintaining the flexibility to adjust the separating elements during the assembly process.
Data Source
Figure 1~8
Figure 3
Figure 4
AI summary
A production method for an electromagnetic switching device comprises the following steps in the sequence listed: producing a one-piece switching chamber (9), producing a contact bridge carrier (2) and equipping the contact bridge carrier (2) with movable contact bridges (3, 4), wherein the contact bridges (3, 4) comprise a plurality of primary contact bridges (3) and at least one auxiliary contact bridge (4); inserting the contact bridge carrier (2) equipped with the movable contact bridges (3, 4) into the switching chamber (9); inserting partition elements (14) into the switching chamber (9) so that each partition element (14) is arranged between a bridge contact point of one of the primary contact bridges (3) and a bridge contact point of one of the auxiliary contact bridges (4), and equipping the switching chamber (9) with fixed primary counter-contact points; fixing primary covers (15) to the switching chamber (9) so that the primary covers (15) cover the primary counter-contact points and fix the partition elements (14) in the switching chamber (9).