Tire Testing Apparatus Rim Rotation Control
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Solution Overview
Problem
Existing tire testing apparatuses face difficulties in preventing the second rim from rotating together with the first rim when the fixation is released, leading to co-rotation and adjustment challenges during rim assembly replacement.
Innovation Solution
A tire testing apparatus design featuring a first rim with a pin and a groove, and a second rim with a protruding portion, along with a rotating part, fixing part, attaching parts, and a rotation regulating mechanism, allows for independent rotation of the first rim while regulating the second rim, using engaging and moving parts to control rotation and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the fixing part is released to allow rim rotation for replacement, then the rim assembly can be repositioned, but the second rim rotates together with the first rim causing co-rotation and making adjustment difficult
Solution Approach 1:
The invention divides the rotation control into two independent segments: the first rim can rotate independently on the first attaching part, and the second rim can rotate independently on the second attaching part. This segmentation allows each rim to be positioned separately without co-rotation, solving the adjustment difficulty while maintaining ease of repositioning.
Solution Approach 2:
The invention introduces a rotation regulating part as an intermediary mechanism between the two rims. This mediator controls the rotational movement of the second rim independently from the first rim, enabling precise relative position adjustment while preventing unwanted co-rotation during the replacement process.
2Productivity
If a bayonet type joining part is used to connect rims, then the rims can be quickly connected, but the claw and receiving portion bear increased burden during operation
Solution Approach 1:
The invention segments the connection function into two independent attaching parts instead of using a single bayonet-type joining mechanism. Each attaching part independently holds one rim, distributing the operational burden and eliminating the need for high-stress engagement features like claws and receiving portions, thereby reducing wear and increasing durability.
Solution Approach 2:
The invention extracts and removes the bayonet-type joining part (claw and receiving portion) from the system. By replacing it with independent attaching parts that use fixing mechanisms instead of interlocking engagement features, the design eliminates the stress concentration on specific components while maintaining quick connection capability.
3Stability of the object's composition
If frictional force acts within the fixing part during rim rotation, then the rims may be indirectly fixed, but co-rotation occurs making precise positioning difficult
Solution Approach 1:
The invention segments the fixation system into two independent fixing mechanisms, each acting on a separate attaching part. This segmentation eliminates the frictional coupling between rims that causes co-rotation, allowing each rim to be freely adjusted without affecting the other, while maintaining stable fixation when needed.
Solution Approach 2:
The invention introduces rotation regulating parts as intermediaries that decouple the rotational movements of the two rims. These mediators prevent the transmission of frictional forces between the rims through the fixing part, enabling independent rotation and precise positioning while maintaining fixation stability when the regulating parts are engaged.
Data Source
AI summary
A tire testing apparatus allows attachment and detachment of a rim assembly in which first and second rims are integrated and performs testing of a tire attached to the rim assembly. The tire testing apparatus includes a first attaching part; a second attaching part; a rotating part that rotates the first attaching part around a reference axis orthogonal to the first reference surface of the first rim attached to the first attaching part; a fixing part that fixes the first attaching part and the second attaching part to each other and is capable of releasing the fixation; an attaching portion moving part that adjusts the distance in a direction along the reference axis between the first attaching part and the second attaching part; and a rotation regulating part that regulates rotation of the second attaching part around the reference axis.