Magnetic Contactor Latch Assembly With Guided Core Rotation
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Solution Overview
Problem
Existing magnetic contactors face issues with limited movable core movement, potential damage due to collisions, and reduced operational reliability and durability, as well as restricted switching states.
Innovation Solution
A latch assembly with a frame structure that includes rotatably coupled movable cores and latch units, featuring arcuate insertion holes and return members to guide and limit movement, preventing collisions and enhancing durability, while allowing quick and accurate switching between states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable core is coupled through a hole in the first frame, then the movable core can be positioned and supported, but the moving distance is limited and collision damage occurs
Solution Approach 1:
The frame is divided into multiple separate frame members (first frame member, second frame member, third frame member, fourth frame member) that are coupled together. The movable core is coupled through holes in these distributed frame members, allowing extended movement path while maintaining support and positioning throughout the travel distance, thus increasing movement distance without compromising reliability.
Solution Approach 2:
The latch unit acts as an intermediary component between the movable core and the frame members. It guides the movable core's movement, provides additional support points, and prevents direct collision between the movable core and frame members, thereby extending safe movement distance while maintaining operational reliability.
2Strength
If the movable core moves with limited distance, then the frame structure remains compact, but collision and friction cause physical damage
Solution Approach 1:
The latch unit is positioned to engage with the movable core before it can collide with the frame members. This preemptive engagement guides the movable core's movement and absorbs potential impact forces, preventing physical damage to both the movable core and frame members while allowing extended movement distance.
Solution Approach 2:
The latch unit serves as a protective intermediary between the movable core and the frame members. It provides guided movement paths and distributes contact forces across multiple frame members, reducing localized stress and friction damage while enabling longer travel distance for improved durability.
3Length of moving object
If the movable core is restricted by the first frame, then the frame structure is simple, but sufficient movement distance cannot be achieved
Solution Approach 1:
The frame structure is segmented into multiple distributed frame members with holes positioned at different locations. This segmentation allows the movable core to engage with multiple support points throughout its extended travel path, achieving greater movement distance while keeping each individual frame member relatively simple in design.
Solution Approach 2:
The latch unit serves multiple functions: it guides the movable core's movement, provides additional support, prevents collision damage, and enables extended travel distance. This multi-functionality allows the system to achieve complex movement patterns without proportionally increasing overall device complexity.
4Ease of operation
If the trip lever rotates until the trip pin contacts the support pin, then the trip operation is completed, but the movable plate rotates away from the latch assembly
Solution Approach 1:
The latch unit is designed to dynamically adjust its position and engagement with the movable core during the trip operation. As the trip lever rotates and the movable plate moves away, the latch unit maintains proper engagement through its rotatable connection to the frame members, ensuring continuous reliable contact throughout the entire operation sequence.
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
The solution improves operational reliability and durability by guiding movable core movement, minimizing frame damage, and enabling swift state transitions, while also allowing for a more compact design.
Implementation Method 1
a trip coil unit electrically connected to an external trip power source, coupled to the frame, and applying attractive force to the movable core
Implementation Method 2
applying attractive force to the movable core
Implementation Method 3
An insertion hole 141 is formed inside a fourth frame 140 in which the latch unit 400 is rotatably coupled, extending in an arcuate shape along a rotation path of the latch pin 410
Data Source
AI summary
A latch assembly and a magnetic contactor including same are disclosed. A latch assembly according to one embodiment of the present disclosure comprises: a frame; a movable core and a latch unit, which are rotatably coupled to the frame. The movable core is rotatably coupled to a trip coil unit by means of a coupling member. An insertion hole for rotatably supporting the latch unit is formed on the frame. The movable core rotates along the coupling member. In addition, the latch unit is guided and rotated along the insertion hole. Therefore, the operational reliability and endurance limit of the latch assembly can be enhanced.