Outer Rotor Traveling Roller With Integrated Differential Sealing
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Solution Overview
Problem
Traditional traveling rollers have complex structures, low transmission efficiency, high system weight, and poor sealing, leading to dust entry and wear of differential devices due to external motor and transmission systems.
Innovation Solution
A differential traveling roller driven by a built-in outer rotor motor with integrated differential mechanisms and a sealing structure to prevent dust entry, utilizing an outer rotor motor that partially integrates transmission devices on its rotor for traveling and steering, and a radial labyrinth seal to keep the system clean.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an external motor and transmission system is used to drive the traveling roller, then the driving function is achieved, but the structure becomes complicated and the system weight increases
Solution Approach 1:
The patent merges the motor and differential device into an integrated unit. The outer rotor motor's rotor body directly integrates the differential mechanism, eliminating separate transmission components. This merging reduces both structural complexity and system weight while maintaining the driving and differential functions.
Solution Approach 2:
The outer rotor motor serves multiple functions: it provides the driving force, houses the differential mechanism, and acts as the structural core of the traveling roller. This multi-functionality eliminates the need for separate external motor and transmission systems, reducing overall complexity and weight.
2Reliability
If traditional sealing structures are used, then assembly is simple, but dust enters the differential device causing wear
Solution Approach 1:
The patent employs a multi-layer nested sealing structure where the lip seal is nested within the labyrinth seal, which is nested within the differential device housing. This nested arrangement creates multiple barriers against dust entry, significantly improving sealing effectiveness without complicating the overall structure.
Solution Approach 2:
The lip seal uses a flexible rubber element that can deform to maintain contact with the rotating shaft, creating an effective sealing barrier. This flexible sealing approach prevents dust from entering the differential device while maintaining a relatively simple structural design.
Data Source
AI summary
A traveling roller includes a left roller, a right roller, a support shaft, a driving device and a sealing device, wherein the traveling roller may also include an intermediate roller; the support shaft is provided on an axis of the left and right rollers; inner walls of the left and right rollers are respectively connected to support plates; an outer ring of each of the support plates is provided with a notch for dust to flow out; the driving device includes an outer rotor motor sleeved on the support shaft; transmission devices are provided between two end cap seats of a rotor body of the outer rotor motor and the support plates; pawl members of the transmission devices are fixedly sleeved on the end cap seats, or driving planetary gears of the transmission devices are fixed to the rotor body.