Hubcap Elongated Bosses Uniform Clamping Force Sealing
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Solution Overview
Problem
Existing hubcaps for heavy-duty vehicles often result in non-optimal sealing due to uneven clamping force, leading to lubricant leakage and contaminant entry, and require removal before outboard mounted disc brake rotors can be serviced, increasing maintenance time and costs.
Innovation Solution
The hubcap features elongated bosses integrally formed with the side wall, providing a non-cantilevered attachment to the wheel hub, ensuring uniform clamping force and allowing for the removal of outboard mounted disc brake rotors without prior removal of the hubcap, while also supporting hub odometer mounting and drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional hubcap with a cantilevered flange is used, then the hubcap can be easily manufactured and installed, but the clamping force on the sealing gasket becomes uneven, leading to sealing failures and lubricant leakage
Solution Approach 1:
The hubcap is segmented into a main body and multiple elongated bosses that are integrally formed with the side wall. Each boss contains a bolt opening, distributing the attachment points along the circumference. This segmentation allows the hubcap to maintain structural integrity while providing multiple clamping points for uniform gasket compression, resolving the sealing performance issue without requiring complex additional components.
Solution Approach 2:
The elongated bosses extend in the circumferential direction, adding a dimensional element to the hubcap structure. This circumferential extension allows the bolt openings to be distributed along the circumference rather than concentrated at a single radial position, enabling uniform clamping force distribution around the gasket while maintaining a relatively simple integral structure.
2Productivity
If the hubcap is designed with a simple structure, then manufacturing is easier and costs are lower, but the hubcap must be removed before servicing outboard mounted disc brake rotors, increasing maintenance time
Solution Approach 1:
The hubcap structure is segmented with elongated bosses that create circumferential clearance spaces between the hubcap and the wheel hub. These clearance spaces, formed by the spaced arrangement of the bosses, allow the disc brake rotor to be accessed and serviced from the outboard side without requiring complete removal of the hubcap, thus improving maintenance efficiency while keeping the hubcap structure relatively simple.
3Productivity
If the hubcap provides clearance for outboard mounted disc brake rotor removal, then maintenance efficiency improves, but the structural rigidity and sealing capability may be compromised
Solution Approach 1:
The hubcap is segmented into a main body and multiple elongated bosses distributed circumferentially. The elongated shape of the bosses creates clearance spaces between adjacent bosses, allowing access to the disc brake rotor. Meanwhile, the integral formation of bosses with the main body and their elongated structure spanning between bolt openings maintains structural rigidity and ensures uniform clamping force on the gasket, preserving sealing capability while enabling maintenance efficiency.
Data Source
AI summary
A hubcap for a heavy-duty duty vehicle that includes mounting structure that is formed with and cooperates with a side wall of the hubcap to provide a stiff, rigid structure that enables non-cantilevered connection to a wheel hub. The mounting structure can be a plurality of elongated bosses circumferentially spaced about the side wall that are formed with corresponding elongated bolt openings to enable the non-cantilevered attachment to the wheel hub. The elongated bosses cooperate with the hubcap side wall to provide a stiffened or rigid structure between the elongated bolt openings for increased and more uniform clamping force on a sealing gasket between the hubcap and the wheel hub. The hubcap profile provides clearance for removal of an outboard mounted disc brake rotor in heavy-duty vehicle wheel end assemblies that include such rotor configurations. The hubcap may support simple mounting of a hub odometer.