Motor Gear System Pivot Shaft Stabilization
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Solution Overview
Problem
In gear systems connected to motors, long dimensions from the supported point to the system gear can lead to shaft bending and vibration when subjected to external forces, resulting in noise and potential damage due to radial direction vibrations.
Innovation Solution
A gear system design that includes a motor with a stator, rotor, and motor flange, where a pivot shaft is partially fixed in the motor flange's through-hole, and a second gear is attached to the fixed shaft, allowing for rotational meshing with the first gear, thereby stabilizing the shaft against external radial forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the dimension from the supported point to the system gear is increased, then the gear system can accommodate larger gears and higher torque, but the shaft bends and vibrates under external radial forces
Solution Approach 1:
The shaft support structure is segmented into multiple bearing points along the shaft length. Instead of a single supported point, multiple bearings are distributed at different positions to provide intermediate support, reducing the effective span length and preventing shaft bending while accommodating larger gear dimensions.
Solution Approach 2:
Additional intermediate bearings are introduced as mediator elements between the motor shaft and the system gear. These intermediate supports act as mediators that distribute the radial loads and prevent direct transmission of external forces to the shaft, thereby reducing vibration and bending.
2Power
If the shaft length is increased to accommodate larger gears, then higher torque transmission is achieved, but vibration and noise increase due to shaft bending
Solution Approach 1:
The long shaft is effectively segmented into shorter segments by introducing multiple bearing supports. This segmentation allows the shaft to maintain adequate length for torque transmission while preventing bending-induced vibration and noise through distributed support points.
Solution Approach 2:
The design converts the potential harm of long shaft bending into benefit by strategically positioning multiple bearings. The bearing locations are optimized to create rigid support zones that actually enhance the shaft's ability to transmit torque efficiently while eliminating the harmful bending vibrations.
3Stability of the object's composition
If multiple bearings are added to support the shaft, then shaft stability improves, but device complexity increases
Solution Approach 1:
The motor housing and gear casing are designed with integrated bearing mounting features that serve multiple functions. The same structural elements that provide housing and alignment also accommodate the additional bearings, reducing the need for separate complex support structures.
Solution Approach 2:
Multiple bearing supports are merged into a coordinated arrangement where bearings are positioned to simultaneously support both the motor shaft and the system gear shaft. This merging of support functions reduces the overall complexity compared to independent support systems for each shaft.
Data Source
AI summary
A gear system connected to a motor, the motor including a motor shaft, a motor housing, and a motor flange, is provided. A first gear is attached to an axially lower end of the motor shaft. A second gear is attached to an axially upper end of a fixed shaft, the second gear meshing with the first gear and being rotatable with respect to the fixed shaft. A pivot shaft is directly or indirectly attached to the axially upper end of the fixed shaft, the pivot shaft being at least partially fixed in a third through-hole of a motor flange.