Motor Stator Mounting Structure Using Rotational Mechanical Locking

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Solution Overview

Problem

The existing mounting structures for stators in electrical fans require adhesive materials, which complicate assembly, increase costs, and pose environmental pollution risks due to non-biodegradable materials.

Innovation Solution

A mounting structure comprising a central tube with positioning blocks and a supporting plate with a mounting block, where the stator is securely locked onto the tube through rotational alignment of the positioning blocks with the stator's grooves and the mounting block engaging with a cutout on the printed circuit board, eliminating the need for adhesives.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive is used to fix the stator to the central tube, then the stator can be securely positioned, but the assembly process becomes complicated and costs increase

Engineering Contradiction:

Improvestator positioning securityVSAvoidassembly process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the chemical bonding system (adhesive) with a mechanical locking system consisting of positioning blocks and positioning grooves. The positioning blocks on the central tube engage with corresponding grooves on the stator through rotational movement, providing secure mechanical fixation without requiring adhesive materials or complex assembly procedures.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent divides the fixation function into separate components: positioning blocks on the central tube and corresponding positioning grooves on the stator. This segmentation allows each component to perform its specific function independently, simplifying the overall assembly process while ensuring reliable positioning security.

Inventive Principle:

Principle #1Segmentation

2Reliability

If adhesive is used to fix the stator, then positioning security is achieved, but manufacturing costs increase

Engineering Contradiction:

Improvestator positioning securityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent eliminates the need for adhesive materials by implementing a pure mechanical locking mechanism. The positioning blocks and grooves work together to provide secure fixation, thereby removing the cost associated with adhesive materials and their application processes, simplifying manufacturing while maintaining positioning security.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If adhesive is used for mounting, then the stator can be fixed, but environmental pollution occurs due to non-biodegradable materials

Engineering Contradiction:

Improvestator fixationVSAvoidenvironmental pollution

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces chemical adhesives with a mechanical locking system, thereby eliminating the use of non-biodegradable adhesive materials that cause environmental pollution. The mechanical engagement between positioning blocks and grooves provides effective fixation without introducing harmful substances into the environment, making the manufacturing process more environmentally friendly.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Device complexity

If a simple mechanical structure is used without adhesive, then assembly is simplified, but mounting security may be compromised

Engineering Contradiction:

Improveassembly process simplicityVSAvoidmounting security

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent employs multiple positioning blocks distributed around the central tube, each engaging with corresponding grooves on the stator. This segmented approach distributes the locking force across multiple contact points, enhancing mounting security while maintaining the simplicity of the mechanical assembly process without requiring adhesive materials.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS7608960B2Mounting structure for a stator of a motor- stator

Publication Date: 2009.10.27 CHAMP TECH OPTICAL (FOSHAN) CORP

AI summary

A mounting structure for a motor includes a central tube (16), a supporting plate (13) and a motor-stator (30). The central tube includes two positioning blocks (162). The supporting plate includes a mounting block (18). The motor-stator includes a printed circuit board (31) and a stator (33). The stator defines an axis hole (337) for receiving a portion of the tube therein and two positioning grooves (3332) in an inner surface thereof. The printed circuit board defines a cutout (311) therein. One of the stator and the tube is rotated from an unlocked position, where the positioning blocks are located just above the positioning grooves and the mounting block is received in the cutout, to a locked position, where a bottom surface of the positioning blocks abut against a top surface of the stator and the mounting block leaves the cutout and engages with the printed circuit board.