Single-Arm Hollow Wheel Assembly Without Threaded Axle Fixing
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Solution Overview
Problem
Conventional wheel sets are heavy and costly due to the use of a pair of fixing arms and fixing pieces with locking threads, which complicates the structure and increases production costs.
Innovation Solution
A hollow wheel set design without a conventional wheel axis, utilizing a single fixing arm, a hollow rotation wheel, a restricting sleeve, and a restricting and fastening ring to eliminate the need for locking threads and simplify assembly, with the restricting sleeve and ring-shape blocking portion restricting lateral movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional wheel axis with locking threads is used, then the wheel can be securely fixed, but the structure becomes complicated and assembly efficiency decreases
Solution Approach 1:
The invention extracts and eliminates the wheel axis and locking thread components from the conventional wheel fixation system. Instead of using a traditional axis with locking mechanisms, the patent uses a simplified fixation arm structure with positioning pieces that directly engage with the wheel hub, removing unnecessary elements while maintaining secure fixation.
Solution Approach 2:
The positioning pieces on the fixation arm are designed to automatically engage with corresponding features on the wheel hub through simple insertion and rotation actions. The structure itself provides its own positioning and locking function without requiring separate locking threads or complex fastening mechanisms, allowing the component to serve its own fixation purpose.
2Stability of the object's composition
If a pair of fixing arms is used to support the wheel, then the wheel structure is stable, but the production cost increases
Solution Approach 1:
The invention transitions from a symmetric dual-fixation-arm structure to an asymmetric single-fixation-arm design. The solitary fixation arm is strategically positioned and dimensioned to provide adequate support and stability for the wheel, eliminating the redundancy of the second arm while maintaining structural integrity and reducing manufacturing costs.
Solution Approach 2:
The patent modifies the geometric parameters and structural dimensions of the fixation arm to compensate for reducing from two arms to one. The arm is designed with optimized length, thickness, and reinforcement features that enable it to bear the wheel load independently, maintaining stability while reducing material usage and production cost.
3Ease of operation
If a wheel axis is included in the wheel structure, then the wheel can be properly assembled, but the overall weight of the wheel set increases
Solution Approach 1:
The invention extracts and removes the wheel axis component entirely from the wheel structure. The wheel hub is designed with integrated positioning features that directly interface with the fixation arm, eliminating the need for a separate axis component and thereby reducing the overall weight of the wheel assembly while maintaining assembly capability.
4Reliability
If multiple components including fixing pieces with locking threads are used, then the wheel can be securely fastened, but the number of elements increases and assembly efficiency decreases
Solution Approach 1:
The invention merges multiple separate fastening components into an integrated fixation arm assembly. The positioning pieces, support structure, and fastening features are combined into a single unified component that performs multiple functions simultaneously, eliminating the need for separate fixing pieces with locking threads and significantly simplifying the assembly process.
Solution Approach 2:
The fixation arm structure incorporates self-positioning and self-locking features through its geometric design. The positioning pieces automatically align and engage with the wheel hub features during simple insertion and rotation, providing secure fastening without requiring separate locking mechanisms or complex assembly steps, thereby enhancing assembly efficiency while maintaining fastening security.
Data Source
AI summary
A hollow wheel set, comprising mainly a wheel rack, a hollow rotation wheel, a restricting sleeve, and a restricting and fastening ring. The wheel rack includes a fixing arm, on said fixing arm is provided with a wheel fork. The hollow rotation wheel is sleeved onto the wheel fork. One end of the restricting sleeve is a sleeve connection portion, while the other end is a ring-shape blocking portion. The sleeve connection portion is sleeved and fixed on the outer perimeter of the wheel fork, and is located between the wheel fork and the hollow rotation wheel. The ring-shape blocking portion is on a side of the hollow rotation wheel. The restricting and fastening ring is fastened around outer perimeter of the wheel fork, and is locate on the other side of the hollow rotation wheel, to reduce size and weight of the hollow wheel set.