Vehicle Tie Rod Adjustment Device with Roller Elements
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Solution Overview
Problem
Existing tie rod adjustment devices face challenges in setting the toe dimension of vehicle wheels due to imperfections on the tie rod assembly's outer surface causing friction and spatial constraints limiting device size, which hinder smooth lateral movement and effective adjustment.
Innovation Solution
A gear head with a geared socket and guide fork featuring roller elements for reduced friction, along with a locking mechanism using an arm component, plate, and retention device to maintain the gear head's position, facilitating smooth adjustment and alignment within tight spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional tie rod adjustment device is used, then the device can engage the tie rod assembly, but friction from surface imperfections interrupts smooth lateral movement
Solution Approach 1:
The patent introduces roller elements as intermediary components between the guide fork and the tie rod assembly surface. These rollers mediate the contact, converting sliding friction into rolling friction, thereby eliminating the harmful friction caused by surface imperfections and enabling smooth lateral movement.
Solution Approach 2:
The patent replaces the traditional sliding mechanical contact system with a rolling contact system. By substituting the direct sliding interface with roller elements, the mechanical interaction changes from friction-based to rolling-based, significantly reducing resistance and improving ease of operation.
2Measurement precision
If the tie rod adjustment device is made larger for better engagement, then adjustment precision improves, but tight spatial constraints in the undercarriage layout prevent adequate lateral movement
Solution Approach 1:
The patent divides the guide fork into segments with roller elements positioned at specific intervals. This segmentation allows the guide fork to maintain precise engagement with the tie rod assembly while the roller elements enable smooth movement through tight spaces, resolving the conflict between size and maneuverability.
Solution Approach 2:
The patent introduces the roller elements as a new dimensional solution to the spatial constraint problem. By adding this intermediate rolling contact dimension, the system achieves both precise engagement (through the guide fork geometry) and adequate movement (through the rolling action), overcoming the limitations of traditional sliding contacts in confined spaces.
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 reduces frictional forces and accommodates spatial constraints, enabling precise toe dimension adjustments and maintaining alignment, thereby improving the efficiency and reliability of the tie rod adjustment process.
Implementation Method 1
the roller element(s) facilitate a sliding movement between the guide fork open recess and the vehicle tie rod assembly
Data Source
AI summary
A vehicle tie rod adjustment device for changing the toe of a vehicle wheel by adjusting the overall length of a tie rod assembly. The tie rod adjustment device generally includes a housing, a gear train, an adjustable gear head, and a nut runner. The pivotal gear head threadably adjusts the tie rod assembly by rotatably engaging a hex or flatted portion and a lock nut, and includes one or more roller elements spaced around a guide fork recess to reduce a sliding friction with the tie rod assembly. According to another embodiment, the tie rod adjustment device includes a locking mechanism for maintaining the adjustable gear head in a proper alignment so that one or more components of the gear head can be removed.