Spring Piece Press-Fitting Assembly for Accurate Motor Housing Mounting
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Solution Overview
Problem
Existing methods for press-fitting spring pieces into motor housings are inefficient and prone to damaging magnetic shoes, with difficulty in achieving accurate positioning.
Innovation Solution
A device comprising a base plate, a housing positioning base, a first press, a loading holder with feeding carriages, and hold-down plates with compression springs, which enables automatic and accurate press-fitting of spring pieces between magnetic shoes without damaging them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a worker uses a hammer to press-fit the spring piece, then the spring piece can be installed, but it causes damage to the magnetic shoes and makes it difficult to ensure accurate positioning
Solution Approach 1:
The patent introduces a specialized press-fitting device as an intermediary tool between the worker and the spring piece. This device includes a pressing mechanism with controlled force application and positioning features that guide the spring piece into place without direct hammer strikes, thereby preventing damage to magnetic shoes while ensuring accurate positioning.
Solution Approach 2:
The patent replaces the manual hammering mechanism with a controlled pressing mechanism. The device uses mechanical advantage through levers or hydraulic/pneumatic systems to apply gradual, controlled force to press-fit the spring piece, eliminating the uncontrolled impact forces that damage magnetic shoes while maintaining positioning accuracy.
2Ease of manufacture
If the spring piece is press-fitted using manual hammering, then installation is possible, but it is difficult to ensure consistent press-fitting position
Solution Approach 1:
The press-fitting device serves as an intermediary with built-in positioning features such as guide holes, alignment pins, or jigs that physically constrain the spring piece to the correct position during installation. This ensures consistent, repeatable positioning across all installations without relying on worker skill or judgment.
Solution Approach 2:
The device incorporates preliminary positioning actions where the spring piece is first aligned and constrained in the correct position before the pressing force is applied. This pre-positioning ensures that once the spring piece is installed, it is guaranteed to be in the accurate, consistent position required.
3Productivity
If the spring piece is press-fitted with hammer strikes, then installation can be completed, but the spring piece occupies space needed for end covers
Solution Approach 1:
The pressing mechanism is designed to be movable and adjustable, allowing the device to adapt to different installation positions and configurations. The dynamic positioning capabilities enable the spring piece to be installed in optimized locations that minimize space occupation while maintaining installation efficiency.
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 device allows for high-accuracy press-fitting of spring pieces, preventing damage to magnetic shoes and ensuring consistent positioning, thereby improving production efficiency and simplifying the fitting of end covers.
Implementation Method 1
a fixed block and a movable block between which a first compression spring is provided are provided in the receiving groove, and the movable block drives the spring piece to move toward the loading slots under the action of the first compression spring
Implementation Method 2
the hold-down plates continue to be pressed down under the action of the first press to press the spring pieces in the loading slots to move down and then to be press-fitted between the two adjacent magnetic shoes
Data Source
AI summary
An objective of the present invention is to provide a device for mounting spring pieces on a machine housing that can enable high-accuracy press-fitting of the spring piece without any damages to magnetic shoes. The present invention comprises a base plate on which a housing positioning base and a first press are provided; a loading holder, having feeding carriages fixed on side faces thereof, is provided above the housing positioning base; a lifting block, which is provided with several first guide rods extending down onto a lower side thereof, is provided at an output end of the first press, and the loading holder is linked with and located below the lifting block; the loading holder is provided with first guide slots each having an upward opening to fit to the first guide rod as well as loading slots running vertically, and the lifting block is fixed to hold-down plates each extending downward so that a lower end of each hold-down plate extends into the loading slot; and the feeding carriage is provided with a receiving groove which is communicated with the loading slots and configured to receive the spring pieces laminated from side to side.