Adjustable Shaft Tire Holding Mechanism for Width Variation
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Solution Overview
Problem
Existing tire holding mechanisms require frequent replacement of upper and lower rims to accommodate tires with the same bead diameter but different widths, leading to increased maintenance and operational inefficiencies.
Innovation Solution
A tire holding mechanism featuring a rotatable upper and lower spindle system with adjustable engagement grooves and elevating parts, allowing for the adjustment of the shaft's length without increasing its overall length, enabling the secure holding of tires with varying widths without rim replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distance between upper rim and lower rim is adjusted by replacing rims with different heights, then tires of different widths can be held, but the replacement frequency of upper rim and lower rim increases
Solution Approach 1:
The invention makes the shaft length adjustable through a second elevating part that can extend or retract the shaft in the up-down direction. This dynamic adjustment allows the shaft to accommodate tires of different widths without requiring replacement of the upper and lower rims, thereby resolving the contradiction between adaptability and replacement frequency.
Solution Approach 2:
The invention changes the parameter of shaft length by using the second elevating part to extend or retract the shaft. This parameter change enables the shaft to adapt to different tire widths while keeping the rims fixed, thus reducing replacement frequency while maintaining versatility.
2Adaptability or versatility
If the shaft length is increased to accommodate wider tires, then more tire widths can be held, but the overall length of the shaft increases
Solution Approach 1:
The second elevating part enables the shaft to extend or retract dynamically based on the tire width being inspected. This means the shaft only increases in length when needed to accommodate wider tires, and can be retracted when not needed, thus maintaining adaptability while minimizing the permanent increase in shaft length.
Solution Approach 2:
The second elevating part adds vertical movement capability to the shaft system, allowing length adjustment in the up-down direction. This dimensional change enables the shaft to accommodate different tire widths without requiring a permanently longer shaft, as the extension is achieved through vertical displacement rather than increasing the base shaft length.
Data Source
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AI summary
The present invention is provided with: a shaft (36) which protrudes further toward a lower spindle (23) than an upper rim (16) and includes a plurality of engagement grooves (36C) arranged vertically on the outer periphery of a lower end section (36A) accommodated in a hollow section of the lower spindle (23); a shaft support part (34) which rotatably supports the upper end section of the shaft (36); an engagement part (37) which is accommodated in the hollow section and engages with any one engagement groove (36C) among the plurality of engagement grooves (36C); a first raising/lowering part (27) which integrally moves the upper spindle (32), the shaft (36), and the shaft support part (34) in the vertical direction; and a second raising/lowering part (38) which adjusts the length of the shaft (34) protruding downward from the upper rim (16) by changing the distance between the shaft support part (34) and the upper spindle (32).