Omni Wheel Roller Assembly for Low-Vibration Running Stability
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Solution Overview
Problem
Omni wheels suffer from noise and vibration issues due to complex structures and large gaps between rollers, leading to poor running stability and high production costs.
Innovation Solution
An omni wheel design with a shared roller bracket for two rollers, featuring a second shaft with a limiting portion to secure the second roller structure, reducing gaps and ensuring stability through axial limitation, thereby minimizing vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If multiple rows of alternately arranged small rollers are used to form a multi-row omni wheel, then the tire tread projection consistency is improved, but the structure complexity and production cost increase
Solution Approach 1:
The patent combines multiple roller support functions into a single roller bracket that supports both the first roller and the second roller. This merging of support functions reduces the number of separate brackets needed while maintaining the alternating roller arrangement that provides consistent tire tread projection.
Solution Approach 2:
The roller bracket is designed as a multi-functional component that simultaneously supports multiple rollers and provides connection to the hub bracket. This universal component performs multiple functions (supporting first roller, supporting second roller, connecting to hub) that would otherwise require separate components.
2Stability of the object's composition
If multiple rows of alternately arranged small rollers are used to form a multi-row omni wheel, then the tire tread projection consistency is improved, but the assembly complexity increases
Solution Approach 1:
By merging the support functions for multiple rollers into a single roller bracket, the number of assembly operations is reduced. The roller bracket is assembled once and then supports multiple rollers, simplifying the overall assembly process compared to using separate brackets for each roller.
3Device complexity
If small rollers are embedded in each other to form a single-row omni wheel, then the structure complexity is reduced, but the gap between rollers increases causing poor consistency
Solution Approach 1:
The patent merges multiple rollers (first roller and second roller) onto a single bracket, which allows for better spacing control between rollers compared to embedding approach. This maintains structural simplicity while achieving consistent roller arrangement.
4Stability of the object's composition
If a large roller and small roller share one bracket to reduce gaps, then the roller gap is reduced, but noise and vibration increase
Solution Approach 1:
The patent segments the roller support system into distinct first roller assembly and second roller assembly, each with its own shaft and bearing arrangements. This segmentation allows for optimized design of each roller support to minimize vibration and noise while maintaining small gaps between rollers.
Solution Approach 2:
The patent applies different structural characteristics to different parts of the roller system. The first roller has its own shaft and bearing arrangement, while the second roller has a different shaft configuration with limiting portions. This local differentiation allows each roller to be optimized for reduced vibration and noise while maintaining the overall compact arrangement.
5Reliability
If the second shaft body is connected and locked to the first connection structure, then the running stability is improved, but the device complexity increases
Solution Approach 1:
The patent uses a nested connection structure where the second shaft body is inserted into the first connection structure, and the limiting portion fits within the connection structure. This nesting approach provides secure locking and stability while using a compact design that doesn't add significant complexity.
Data Source
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AI summary
An omni wheel, comprising a hub bracket (10) and roller components (20). Each roller component (20) comprises a first roller assembly (21) and a second roller assembly (22); the first roller assembly (21) comprises a roller bracket (211) and a first roller structure; the second roller assembly (22) comprises a second shaft (221) and a second roller structure, and the second shaft (221) comprises a second shaft body (2211) and a limiting portion (2212); and the second shaft body (2211) is connected and locked to a first connection structure (2111) to limit the second roller structure between the limiting portion (2212) and the first connection structure (2111). A moving device is further disclosed. The omni wheel can ensure that second rollers will not shake and oscillate during running of the omni wheel and thus reduce vibrations and noise of the omni wheel, improving the running stability.