Securing Cover Axial Length Reduction Wheel Hub
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Solution Overview
Problem
Existing devices for securing wheel nuts on motor vehicle wheel hubs, particularly center locks, face challenges in preventing unintended release due to deformation under tightening or load torques and require additional stabilizing components like cotter pins.
Innovation Solution
A securing cover with a cylindrical flange and external thread interacting with an internal thread in the wheel hub, featuring a thread-free stabilizing surface and a sealing element like an O-ring to prevent deformation and secure positioning, allowing for a shorter axial length and omission of traditional stabilizing pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional securing means like cotter pins or locking pins are used on the axle stub, then the wheel nut can be secured, but the axle stub and wheel nut require greater axial length and additional stabilizing components are needed
Solution Approach 1:
The invention extracts and eliminates the traditional cotter pins or locking pins from the axle stub by replacing them with a securing cover that integrates the securing function directly onto the wheel nut, thereby reducing the axial length requirements and component count
Solution Approach 2:
The securing cover merges the securing function with the wheel nut assembly by integrating a conical pressing surface and thread-free stabilizing surface directly into the cover structure, eliminating the need for separate stabilizing pins or cotter pins on the axle stub
2Weight of moving object
If the axle stub is made of thin construction, then weight is reduced, but deformation occurs under tightening torques or load torques
Solution Approach 1:
The thread-free stabilizing surface on the securing cover acts as an intermediary element that distributes and stabilizes the torque loads, preventing deformation of the thin-walled axle stub while maintaining weight reduction benefits
Solution Approach 2:
The conical pressing surface on the securing cover performs preliminary stabilization by pressing against the wheel nut before full tightening torque is applied, preventing premature deformation of the thin axle stub construction
3Strength
If a securing cover with thread-free stabilizing surface is used, then deformation of the axle stub is prevented, but additional sealing elements are required to prevent spray or dirt ingress
Solution Approach 1:
The sealing element is designed to perform multiple functions simultaneously: it seals against spray and dirt ingress while also providing additional securing function to fix the position of the securing cover, thereby reducing the need for separate stabilizing components
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 solution provides reliable and secure wheel nut retention without deformation of the axle stub, ensuring reliable sealing and stabilization, thus preventing unintended release and material stress.
Implementation Method 1
at least one sealing element, in particular an O-ring, arranged in a corresponding recess, is provided on the circumferential surface of the extension
Implementation Method 2
the sealing element prevents the securing cover from being unscrewed from or sliding out of the axle stub
Implementation Method 3
a cylindrical extension, which extends from the flange region in the direction of the axle stub, is provided with an external thread and interacts with an internal thread arranged in the hollow axle stub of the wheel hub
Data Source
AI summary
A device for securing a wheel nut on a wheel hub of a motor vehicle, in particular a wheel nut of a center lock on a motor vehicle wheel, wherein the device is designed in the manner of a securing cover, and wherein the securing cover has a cylindrical flange region, which rests at least over a certain area on the end of the hollow axle stub, and a cylindrical extension, which extends from the flange region in the direction of the axle stub, is provided with an external thread and interacts with an internal thread arranged in the hollow axle stub of the wheel hub.