Vehicle Steering Rack Housing Mounting Structure
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Solution Overview
Problem
The existing steering apparatuses face challenges in accurately mounting the rack housing of a gear box on a vehicle body part without coming off, particularly when angle differences are present, leading to issues like noise, steering failure, and reduced responsiveness due to the use of bush structures that increase material costs and lower steering feel.
Innovation Solution
A mounting structure that includes a coupling part on the rack housing with a coupling hole, a nut pipe with an insertion part, and a washer with a groove, allowing for secure fixation and compensation of angle differences through a bolt that passes through the coupling hole, washer, and nut pipe, eliminating the need for bush structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bush structure is used to compensate for angle differences in mounting, then the rack housing can be mounted even with angle differences, but material costs increase and steering feel deteriorates
Solution Approach 1:
A mounting plate is introduced as an intermediary component between the rack housing and the vehicle body. The mounting plate includes a mounting surface with a compensation groove that can accommodate angle differences, while the rack housing is fixed to this plate. This mediator allows angle compensation without requiring expensive bush structures, maintaining both adaptability and cost-effectiveness.
2Adaptability or versatility
If a bush structure is used to compensate for angle differences in mounting, then the rack housing can be mounted even with angle differences, but steering responsiveness and feel are reduced
Solution Approach 1:
The mounting plate serves as a rigid intermediary that provides angle compensation through its compensation groove while maintaining structural stiffness. Unlike flexible bush structures that absorb steering inputs, the mounting plate transmits steering forces directly, preserving steering responsiveness and feel while still accommodating mounting angle variations.
Solution Approach 2:
The compensation groove in the mounting surface is designed with a curved profile that allows the rack housing to be mounted at various angles. The curved geometry provides mechanical guidance for angle adjustment while maintaining a rigid connection, enabling angle compensation without the need for flexible bush elements that would degrade steering feel.
3Reliability
If the rack housing is rigidly mounted to the vehicle body, then steering responsiveness is improved, but the mounting structure cannot accommodate angle differences
Solution Approach 1:
The compensation groove with its curved profile enables the mounting structure to accommodate angle differences through geometric design rather than flexible materials. The curved groove allows the rack housing to be positioned at various angles relative to the vehicle body while maintaining a rigid, responsive connection for steering operations.
Data Source
AI summary
Disclosed is a steering apparatus of a vehicle in which a rack housing of a gear box may be accurately mounted on a vehicle body part without coming off, and when an angle difference of the vehicle body part is present, the angle difference may be compensated for when the rack housing is mounted. The steering apparatus has a mounting structure configured to fixedly mount the rack housing on the vehicle body part. The mounting structure includes a coupling part formed on the rack housing and having a coupling hole, a mounting part provided on the vehicle body part and having a mounting hole, a nut pipe installed at the mounting part and provided with an insertion part, a washer coupled to an outer circumference of the insertion part, and a bolt inserted into the coupling hole, the washer and the mounting hole and threadedly engaged with the nut pipe.