Annular Weight Device for Model Car Wheels
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Solution Overview
Problem
Existing weight devices for radio-controlled model cars require complex balancing to suppress wheel vibration, making it difficult to lower the center of gravity effectively by directly fixing weights to the wheel's outer periphery.
Innovation Solution
A weight device with an annular case and movable weight members that rotate with the wheel, allowing the weights to be positioned at the lower side of the wheel, and adjustable lubricating oil to facilitate even distribution and adjustment, enhancing stability and balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If weights are directly fixed to the wheel's outer periphery, then the center of gravity can be lowered, but the work of fixing the weights becomes extremely complicated due to the need for precise balancing to suppress wheel vibration
Solution Approach 1:
The weight device is segmented into an annular case and separate weight members that can be independently positioned. The annular case is divided into multiple arc-shaped spaces where weight members can be selectively placed, allowing flexible center of gravity adjustment without complex fixing work. This segmentation enables simple attachment to the wheel while achieving the desired weight distribution.
Solution Approach 2:
The weight members are designed to be relatively movable within the annular case, allowing dynamic adjustment of weight position. This mobility enables the weight members to naturally settle at the lowest point when the wheel rotates, automatically achieving balanced weight distribution without requiring precise fixed positioning. The dynamic capability simplifies the fixing process while maintaining vibration suppression.
2Temperature
If the annular case width in the center axial direction is large, then the weight members can be arranged at the lower side, but the weight members become difficult to move in the circumferential direction
Solution Approach 1:
The annular case incorporates an annular plate that divides the internal space in the center axial direction, creating multiple arc-shaped spaces. This dimensional division allows weight members to move freely within each smaller arc-shaped space while maintaining their position at the lower side. The plate structure provides guidance that facilitates circumferential movement without requiring the weight members to traverse the entire width of the annular case.
Solution Approach 2:
The internal space of the annular case is segmented into multiple arc-shaped spaces by the annular plate. This segmentation creates smaller, more manageable spaces that facilitate weight member movement in the circumferential direction. Each arc-shaped space acts as an independent chamber that guides the weight members along the circumferential path, making it easier for them to reach the lower side position even when the overall annular case width is large.
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 weight device simplifies the process of lowering the center of gravity, improving stability and increasing the maximum climbing angle and drag brake effect, while maintaining even lubrication distribution for enhanced performance.
Implementation Method 1
a clearance which is smaller than a diameter of the weight members is formed between an outer end of the annular plate and the outer cylindrical body. Because of this, fluid can be transferred from one of the annular internal space which is divided into two to the other
Implementation Method 2
the weight members are configured to be relatively movable in the circumferential direction with respect to the annular case when the annular case is rotated in the circumferential direction
Implementation Method 3
a lubricating oil is stored in the annular case so that an oil surface is located below the center axis in the stationary state where the annular case is vertically placed
Data Source
AI summary
In order to lower the center of gravity easily, the present invention provides a weight device 3 for model attached to an outer periphery of a wheel of a model car, the weight device 3 having: an annular case 10 extended along a circumferential direction A of the wheel, the annular case 10 having an annular internal space S; and a plurality of weight members 30 arranged in the annular internal space S. The weight members 30 are configured to be relatively movable in the circumferential direction A with respect to the annular case 10b when the annular case 10 is rotated in the circumferential direction A.