Impact Wrench Tool Control Edge Oval Geometry
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Solution Overview
Problem
In motorsport, retention elements in wheel retention systems for vehicle wheels often jam due to high operating loads, making it difficult to release wheel nuts automatically with an impact wrench, requiring manual mechanical release which is time-consuming and inefficient.
Innovation Solution
The screwing tool features a control edge with a circular arc and cam region design that generates radial force vectors to release jammed retention elements, allowing automated engagement with the wheel nut, and is integrated with a phase region for secure engagement around the wheel nut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retention elements are used to secure wheel nuts against twisting, then wheel security is improved, but the retention elements can jam in the hub body under high operating loads
Solution Approach 1:
The control edge is designed with a circular arc region that generates radial force vectors when the impact wrench is activated. This curved geometry allows the control edge to effectively push the retention element radially outward, releasing it from the hub body even when jammed, without requiring manual mechanical intervention
2Ease of operation
If retention elements are pressed inward to release wheel nuts, then wheel nut release is enabled, but manual mechanical release requires large expenditure of force and time
Solution Approach 1:
The invention replaces manual mechanical release with an automated impact wrench system. The impact mechanism generates rapid axial impacts that are converted by the control edge's circular arc geometry into radial force vectors, automatically pushing the retention element outward to release the wheel nut without manual intervention
Solution Approach 2:
The impact wrench delivers periodic axial impacts to the control edge, which are transformed into radial force vectors by the circular arc region. This periodic impact action efficiently overcomes the jammed retention element and enables rapid automated release
3Ease of manufacture
If a rectilinear control edge is used, then the structure is simple, but it cannot generate radial force vectors to release jammed retention elements
Solution Approach 1:
The control edge incorporates a circular arc region with constant control edge height that converts axial impact forces from the impact wrench into radial force vectors. This curved geometry is essential for automatically releasing jammed retention elements, enabling the system to achieve high extent of automation while remaining manufacturable
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
Enables rapid and automated release of jammed wheel nuts, reducing manual effort and time required for operation, particularly beneficial in motorsport applications.
Implementation Method 1
at least one cam region with a control edge height h2 that decreases continuously and then increases again continuously
Implementation Method 2
the control edge has at least one circular arc region with a constant control edge height h1 and at least one cam region with a control edge height h2 that decreases continuously and then increases again continuously, wherein h1 is equal to h2 in the respective transition of the circular arc region and of the cam region, such that the geometrical shape of an oval is reproduced in cross section
Data Source
AI summary
A screwing tool for an impact wrench for screwing wheel nuts onto and off from a hub body for securing a vehicle wheel, having a main body, which has an open side oriented toward the wheel nuts and which includes a hollow profile. The hollow profile has a tool contour, which is arranged on the open side and can be brought into engagement with a wheel nut contour. At least one peripheral control edge is remote from the open side for releasing a retention element. The control edge has a circular arc region with a constant control edge height h1 and a cam region with a control edge height h2 that decreases continuously and then increases again continuously. Height h1 is equal to h2 in the respective transition of the circular arc region and the cam region, such that the geometrical shape of an oval is reproduced in cross section.