In-Wheel Motor Buffer Structure for Vertical Impact Absorption
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Solution Overview
Problem
Conventional electric quick boards with in-wheel motor driving devices lack effective impact absorption, particularly at the rear wheel, leading to user fatigue and potential breakdowns due to inadequate buffer systems.
Innovation Solution
An in-wheel motor driving device is designed with a buffer unit between the in-wheel motor and the movement device, utilizing a supporting portion with guide bars and blocks to absorb vertical impacts, incorporating a compression coil spring or shock absorber for effective cushioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an in-wheel motor driving device is equipped in a wheel, then the wheel can be rotated to drive the movement device, but the structure becomes more complex and additional buffer devices cannot be installed
Solution Approach 1:
The patent combines the in-wheel motor driving device with the buffer function into a single integrated structure. The motor is mounted within the wheel assembly, and the buffer device is incorporated into the same structural space, merging two separate functions (driving and shock absorption) that would traditionally require separate components and installation locations.
2Reliability
If an additional buffer device is installed to absorb impact, then impact absorption improves, but the device structure becomes more complex and installation space is insufficient
Solution Approach 1:
The buffer device is nested within the existing wheel assembly structure. The shock absorber is positioned inside the space already occupied by the in-wheel motor and wheel components, utilizing the existing structural envelope rather than adding external buffer components. This nesting approach allows impact absorption functionality to be added without increasing the overall device complexity or requiring additional installation space.
3Ease of manufacture
If the wheel structure is simplified to reduce complexity, then ease of manufacture improves, but the ability to integrate motor and buffer functions is reduced
Solution Approach 1:
The wheel assembly is designed as a universal structure that performs multiple functions: it serves as the wheel for ground contact, houses the in-wheel motor for power generation, and incorporates the buffer device for shock absorption. This multi-functional design allows a single structural component to fulfill multiple roles, maintaining ease of manufacture while enabling the integration of motor and buffer functions within the same assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively buffers impacts transferred from the road, simplifying the overall structure and reducing user fatigue by integrating the buffer unit within the existing installation space, enhancing the stability and longevity of the movement device.
Implementation Method 1
a buffer unit (50) provided between the in-wheel motor (30) and the movement device (100) so as to buffer an impact generated during vertical movement
Implementation Method 2
incorporating a compression coil spring or shock absorber for effective cushioning
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
The present invention provides: an in-wheel motor driving device, which is improved so as to enable impact transmitted from the road during traveling to be buffered; and a movement device including the same. The in-wheel motor driving device, according to the present invention, comprises: a wheel including a rim; an in-wheel motor provided inside the rim and rotating the rim; a supporting part provided at the side surface of the in-wheel motor, and having the movement device connected at one side thereof; and a buffer unit provided between the in-wheel motor and the supporting part so as to buffer the impact generated during vertical movement.