Stationary Induction Apparatus Fixing Structure
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Solution Overview
Problem
Existing stationary induction apparatus fixing structures, such as those using leaf springs or retainers, often require multiple components and assembly steps, leading to increased costs and potential core misalignment due to single-direction fixation, with leaf springs causing local force concentration on laminated cores.
Innovation Solution
A fixing structure with a small number of components that uses an abutting member and a resolving portion with inclined faces to distribute impelling force in orthogonal directions, allowing reliable fixation with reduced resin usage and simplified assembly, featuring a slide block and slide base with inclined faces to absorb displacement and distribute forces efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-direction fixing method (leaf spring or retainer) is used, then the structure is simple, but the core may shift in directions not covered by the fixing mechanism
Solution Approach 1:
The patent combines multiple fixing functions into a single integrated structure. The fixing member includes both a pressing portion for vertical pressing and side surfaces for horizontal positioning, eliminating the need for separate fixing components in different directions while ensuring the core cannot shift in any direction.
Solution Approach 2:
The fixing member serves multiple functions simultaneously: it presses the core vertically through the pressing portion, prevents horizontal shifting through its side surfaces, and provides structural support within the case. This multi-functional design replaces what would traditionally require multiple specialized components.
2Reliability
If multiple components and assembly steps are added to prevent core shifting, then fixation reliability improves, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent consolidates multiple fixing operations into a single assembly step. The fixing member is installed in one operation, simultaneously achieving vertical pressing and horizontal positioning of the core, thereby reducing assembly complexity while maintaining fixation reliability.
Solution Approach 2:
The fixing member is designed with distinct functional segments: a pressing portion for vertical force application and side surfaces for horizontal constraint. This segmentation of functions within a single component allows it to perform multiple fixing tasks without requiring multiple separate parts.
3Device complexity
If a leaf spring is used for fixation, then the structure is simple, but excessive force concentrates on local areas of the laminated core
Solution Approach 1:
The pressing portion is designed with a surface that contacts the core over an extended area rather than a single point or narrow line. This distributes the pressing force across multiple laminations of the core, preventing local force concentration while maintaining the simplicity of the fixing structure.
Solution Approach 2:
The fixing member features a specifically designed pressing portion with optimized contact characteristics. The local geometry of this portion is tailored to distribute force evenly across the core surface, addressing the force concentration issue at the point of contact while leaving other parts of the structure simple.
4Device complexity
If thin plate-shaped leaf springs are used, then the fixing structure is simple, but large amounts of space remain unused in the case, increasing resin usage and cost
Solution Approach 1:
The fixing member has a block-shaped, compact geometry that efficiently utilizes the available space within the case. Unlike thin leaf springs that occupy minimal space, the solid fixing member fills the vertical dimension and can be positioned to optimize space utilization, reducing the volume of resin required for packaging.
Solution Approach 2:
The invention transitions from a two-dimensional thin plate structure to a three-dimensional block structure. This dimensional change allows the fixing member to occupy and utilize the vertical space within the case more effectively, reducing unused space and thereby reducing resin consumption.
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 solution enables reliable, cost-effective fixation of stationary induction apparatuses with fewer components and reduced resin usage, preventing local force concentration and simplifying assembly, while effectively distributing forces to absorb thermal and vibrational stresses.
Implementation Method 1
a resolving portion, which resolves the impelling force due to the fixture such that the abutting member impels the stationary induction apparatus in a second direction different from the first direction, is provided between the abutting member and the support member
Data Source
AI summary
The present invention provides a fixing structure and a fixing member for a stationary induction apparatus, which can easily and inexpensively be assembled with a small number of constituent elements, and which are capable of reliable fixation. A fixing portion 4 which fixes the core 2 of a reactor to a case 1 is provided. The fixing portion 4 has a slide block 40 in contact with the core 2; a fixing bolt 42 which fixes the slide block 40 with respect to the case 1; and a slide base 41 provided between the slide block 40 and the case 1, and fixed to the case 1 together with the slide block 40. The slide block 40 and the slide base 41 have inclined faces 40d, 41b in mutual contact, and the slide block 40 has a first impelling portion 40a which impels the core 2 in a vertical direction and a second impelling portion 40b which impels the core 2 in a horizontal direction, according to fastening by the fixing bolt 42.