Treadmill Motor Flywheel Axial Fixation via Sleeve and Locking Device
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Solution Overview
Problem
Conventional treadmill motors face instability and noise due to a loose connection between the flywheel and rotating shaft, leading to reduced lifespan and increased costs from complex installation processes.
Innovation Solution
A motor design featuring a housing, stator, rotor, and flywheel with a sleeve and locking device, including a stop plate and screw, to securely fix the flywheel to the rotating shaft, preventing axial movement and facilitating easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the flywheel is connected to the rotating shaft via a key only, then the connection is simple, but the connection is loose and the flywheel may move axially
Solution Approach 1:
The patent combines multiple connection methods (key connection, sleeve fitting, and screw locking) into a unified connection system. The key prevents radial movement, the sleeve provides axial positioning, and the screw ensures tight fixation, creating a comprehensive solution that maintains both simplicity and reliability.
Solution Approach 2:
The sleeve acts as an intermediary component between the rotating shaft and the flywheel. It fits onto the rotating shaft and abuts against the flywheel, providing a stable interface that prevents axial movement while maintaining ease of assembly and disassembly.
2Ease of operation
If the flywheel connection structure is simplified, then installation is easier, but the connection becomes loose causing noise and instability
Solution Approach 1:
The patent merges multiple fixation functions into a compact connection structure that can be installed easily. The key, sleeve, and screw work together as an integrated system that prevents axial movement and eliminates noise, while maintaining simple installation procedures.
Solution Approach 2:
The connection structure is designed to be self-aligning and self-fixing. The key automatically positions the flywheel radially, the sleeve provides axial positioning, and the screw secures the connection, reducing the need for complex alignment procedures during installation.
3Reliability
If a tight connection is implemented between flywheel and rotating shaft, then stability improves, but installation complexity and cost increase
Solution Approach 1:
The connection structure is segmented into distinct functional components: the key for radial positioning, the sleeve for axial positioning, and the screw for secure fixation. This segmentation allows each component to perform its specific function efficiently while keeping the overall structure manageable and cost-effective.
Solution Approach 2:
The sleeve serves as an intermediary that simplifies the connection between the rotating shaft and flywheel. It provides a standardized interface that ensures tight connection and stability while facilitating easier installation compared to direct complex fastening methods.
Data Source
AI summary
A motor for a treadmill, containing at least a housing (1), a stator (2), a rotor (3) having a rotating shaft (4), a front end cover (9), a rear end cover (5), and a flywheel (13). The front end cover (9) and the rear end cover (5) are disposed on both ends of the housing (1), respectively. The stator (2) and the rotor (3) are disposed in the housing (1). A front end of the rotating shaft (4) extends from the housing (1). The flywheel (13) is disposed on the front end of the rotating shaft (4). The rotating shaft (4) is connected to the flywheel (13) via key (14). A sleeve (12) is fit on the front end of the rotating shaft (4). The sleeve (12) abuts against the flywheel (13). A locking device is disposed at the end of the rotating shaft (4) and tightly fixes the flywheel (13).