Hub Holding Structure With Dual Nuts for Aligned Mounting
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Solution Overview
Problem
The existing single nut locking mechanism for hub holding apparatuses in automobiles imposes uneven force due to a spring, making it difficult to mount and remove auxiliary devices, as the holding center and hub center hole are not on the same plane, and the spring's uneven force complicates the insertion and removal process.
Innovation Solution
A hub holding apparatus with two nuts sleeved on a screw, where the screw's rotation causes the nuts to move towards or away from each other, allowing for equal and controlled force application, facilitating easy mounting and removal of auxiliary devices by ensuring the nuts' threads move in opposite directions with equal pitch, maintaining alignment and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single nut locking mechanism is used, then the structure is simple, but the force distribution is uneven making it difficult to mount and remove auxiliary devices
Solution Approach 1:
The single nut is segmented into two nuts (first nut and second nut) that work in conjunction with a dual-threaded screw. The screw has a first threaded portion with right-handed threads and a second threaded portion with left-handed threads, allowing each nut to be independently positioned and controlled, thereby achieving balanced force distribution while maintaining structural simplicity.
Solution Approach 2:
The screw employs asymmetric threading with opposite hand directions (right-handed and left-handed threads) on different portions of the same screw shaft. This asymmetric design allows the two nuts to move in opposite directions when the screw rotates, enabling precise control over the positioning of the auxiliary device relative to the hub center hole.
2Device complexity
If a single nut is used with spring force, then the release mechanism is simple, but the uneven force causes misalignment between holding center and hub center hole
Solution Approach 1:
The single spring force application point is segmented into two separate spring systems (first spring and second spring), each acting on a different nut. This segmentation allows the force to be distributed symmetrically, ensuring that the holding center aligns precisely with the hub center hole during both mounting and removal operations.
Solution Approach 2:
The dual-nut system with opposite-threaded screw portions acts as a counterbalancing mechanism. When one nut is pushed away by spring force, the other nut moves in the opposite direction, compensating for any misalignment and maintaining the holding center aligned with the hub center hole throughout the operation.
3Device complexity
If a single-start nut is used, then the locking mechanism is simple, but the spring creates uneven force pushing two sides away by different distances
Solution Approach 1:
The single nut is segmented into two separate nuts that engage with different threaded portions of the screw. Each nut is independently controlled by its own spring, allowing the force to be evenly distributed across both sides. The segmentation ensures that both nuts move by equal distances in opposite directions, maintaining force distribution uniformity.
Solution Approach 2:
The screw thread parameters are changed to include two different thread directions (right-handed and left-handed) with matched pitch values. This parameter change ensures that when the screw rotates, both nuts move by identical distances in opposite directions, achieving uniform force distribution while maintaining the simplicity of the nut mechanism.
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 apparatus enables quick and convenient mounting and removal of auxiliary devices by ensuring the nuts apply equal force in opposite directions, maintaining alignment and simplifying the process, thus overcoming the challenges of uneven force application in existing systems.
Implementation Method 1
a screw rotatable relative to the base, the screw including a first threaded portion and a second threaded portion... when the screw is rotated, the two nuts approach to or move away from each other along the screw
Implementation Method 2
a thread of the first threaded portion being disposed along a first rotation direction, and a thread of the second threaded portion being disposed along a second rotation direction, the first rotation direction and the second rotation direction being opposite to each other
Data Source
AI summary
The present application provides a hub holding apparatus, including: a base on which a mounting hole and a receiving cavity are disposed, a center line of the mounting hole being perpendicular to a center line of the receiving cavity, and the mounting hole being in communication with the receiving cavity; a screw rotatable relative to the base; a first nut sleeved on the first threaded portion and received in the receiving cavity; and a second nut sleeved on the second threaded portion and received in the receiving cavity.