Wheel Spacer Disc With Stepped Bolt Openings for Precise Centering
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Solution Overview
Problem
Existing wheel spacer discs for motor vehicles face challenges in effectively centering wheels relative to the disc and hub, leading to potential imbalance and difficulties in mounting wheels due to manufacturing tolerances and inadequate design for receiving shaft nuts and stud bolts.
Innovation Solution
A wheel spacer disc with stepped wheel bolt openings, a center opening, and integral or separate centering elements that compensate for tolerances, allowing for precise centering and stable mounting by accommodating shaft nuts and stud bolts, ensuring proper alignment and balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wheel spacer disc uses simple wheel bolt openings, then manufacturing is easier, but shaft nuts cannot be properly received and mounting is difficult
Solution Approach 1:
The wheel bolt openings are segmented into two distinct sections: a first section with a smaller diameter for receiving stud bolts, and a second section with a larger diameter for receiving shaft nuts. This segmentation allows each section to be optimized for its specific function, enabling both easy manufacture and easy mounting of wheels with shaft nuts.
Solution Approach 2:
The wheel bolt openings transition from a single-dimension hole to a two-section stepped structure with different diameters. This dimensional change creates distinct receptacles within the opening, allowing simultaneous accommodation of stud bolts and shaft nuts, thereby resolving the contradiction between manufacturing simplicity and mounting ease.
2Device complexity
If wheel spacer disc does not have centering elements, then structure is simpler, but wheel and hub cannot be centered leading to imbalance
Solution Approach 1:
Centering elements are integrated into the wheel spacer disc structure to perform the centering action preliminarily, before the wheel is fully mounted. The wheel centering element centers the wheel relative to the disc, and the wheel hub centering element centers the disc relative to the hub, ensuring proper alignment and preventing imbalance.
Solution Approach 2:
The centering elements are merged with the wheel spacer disc as integral components rather than separate parts. This merging maintains structural simplicity while achieving reliable centering, as the centering elements are formed as part of the disc itself during manufacturing.
3Ease of manufacture
If wheel spacer disc is not symmetrical, then manufacturing is easier, but mass distribution is poor causing rotation imbalance
Solution Approach 1:
The wheel spacer disc employs symmetrical design with elements arranged as symmetrically as possible about a central longitudinal axis. This deliberate symmetry ensures proper mass distribution for balanced rotation, while the stepped wheel bolt openings introduce controlled asymmetry only where functionally required for shaft nut reception.
Data Source
AI summary
A wheel spacer disc for motor vehicles havinga plurality of wheel bolt openings,a rim centering element for centering a rim relative to the wheel spacer disc, anda wheel hub centering element for centering the wheel spacer disc relative to a wheel hub.The plurality of wheel bolt openings are designed in each case as stepped openings for the respective partial reception of shaft nuts, wherein a section of the stepped openings having a greater diameter is arranged on a side of the wheel spacer disc on which the rim centering element is arranged.