Electric Sander Motor Split Eccentric Shaft Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly of electric sander motors is hindered by the eccentric axial shaft's non-coaxial arrangement and weight distribution, making alignment and vision obstruction issues during assembly.
Innovation Solution
A biaxial split-type eccentric transmission assembly is introduced, featuring a power axial shaft with an axial hole and a sleeve with an eccentric axial shaft, where the power axial shaft is assembled first into the motor main body, followed by the sleeve, preventing obstruction and facilitating assembly, and allowing for universal connection of sleeves of different sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shaft and sleeve are integrally connected in a non-coaxial arrangement, then the eccentric transmission function is achieved, but the sleeve hinders the vision of assembly personnel and alignment becomes difficult
Solution Approach 1:
The integral shaft-sleeve component is divided into separate shaft and sleeve components. The shaft is assembled first into the motor main body, followed by the sleeve, which eliminates the vision obstruction problem while maintaining the eccentric transmission function through their connected relationship
Solution Approach 2:
The shaft is assembled into the motor main body before the sleeve is installed. This preliminary assembly sequence allows assembly personnel to clearly see and align the shaft position first, then connect the sleeve, thereby avoiding alignment difficulties and vision obstruction
2Ease of operation
If the shaft and sleeve are separated into assembly steps, then assembly vision and alignment are improved, but the device structure becomes more complex
Solution Approach 1:
While the shaft and sleeve are assembled separately, they are designed to connect firmly to each other, effectively merging their functions. The sleeve connects to the shaft through the axial hole, creating a unified eccentric transmission assembly that maintains structural simplicity despite the separated assembly process
Data Source
AI summary
An electric sander motor includes a motor main body (100), a power axial shaft (210) and a sleeve (220). The motor main body (100) includes a rotor (110) and a stator (120) surrounding the rotor (110). The power axial shaft (210) includes an axial hole (211) extending along a central axis of the power axial shaft (210). The sleeve (220) includes one open end and another closed end extended outward to form an eccentric axial shaft (221) penetrating through the axial hole (211). A central axis of the eccentric axial shaft (211) is parallel with a central axis of the sleeve (220) and spaced apart therefrom. The power axial shaft (210) penetrates through the rotor (110), and the sleeve (220) is outside the motor main body (100). The assembly is facilitated by assembling the power axial shaft (210) and the sleeve (220) onto the motor main body (100) sequentially.