Pole Winding Screw Locking Plate for Anti-Twist Securing
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Solution Overview
Problem
Existing pole winding support screws in electrical machines, particularly in salient-pole machines, are prone to loosening and twisting, posing risks of injury and damage due to the need for manual tightening and potential tool slippage.
Innovation Solution
A locking mechanism using a slotted locking plate and an intermediate element, such as a sheet metal, secured by screws or welded to the support, which engages with the pole winding support screws to prevent loosening and twisting, utilizing a positive fit between the locking device and screw head contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the corners of the locking plate are turned over with a hammer to secure the pole winding support screws, then the screws are secured against loosening, but injuries may occur to a hand or damage to adjacent components if the tool slips
Solution Approach 1:
The patent introduces an intermediate element (fuse) made of sheet metal that acts as a mediator between the locking plate and the support. This fuse element has a contour that matches the screw head contour, allowing it to be pressed against the screw head to secure the screw without directly manipulating the locking plate corners with a hammer, thereby eliminating the injury risk while maintaining securing reliability
Solution Approach 2:
The fuse element is designed as a disposable component that is pressed against the screw head and then discarded after serving its purpose of securing the screw. This eliminates the need for repeated hammering operations and the associated safety risks, while providing reliable one-time securing of the pole winding support screws
2Ease of operation
If non-preloaded pole winding support screws are used, then installation is simplified, but the screws are more prone to loosening and twisting
Solution Approach 1:
The fuse element is designed to work with the contour of the screw head to provide self-centering and self-aligning functionality. When pressed against the screw head, the fuse automatically positions itself correctly without requiring precise alignment or preloading, maintaining installation simplicity while providing reliable anti-loosening protection through the contour matching mechanism
Data Source
Figure 1~2
AI summary
A pole winding support (1) of an electrical machine, comprising pole winding support screws (2, 3, 4) and a securing means (5, 6) for at least one pole winding support screw (2, 3, 4), has a fixedly positioned securing means (5, 6) for a pole winding support screw (2, 3, 4). According to a method for securing a pole winding support screw (2, 3, 4) of a pole winding support of an electrical machine, pole winding support screws (2, 3, 4) are secured in a position predetermined by the securing means (5, 6) depending on a contour of a securing means (5, 6) for the pole winding support screws (2, 3, 4).