Steering Gearbox Rib Structure for Boss Rigidity
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Solution Overview
Problem
The existing steering apparatuses with rigid structures suffer from deformation issues at vehicle attachment boss portions, leading to reduced steering stability due to insufficient rigidity, particularly at the counter-pinion-side end, which affects the precision and speed of steering operations.
Innovation Solution
The introduction of a V-shaped rib structure, including multiple ribs at strategic locations on the steering gearbox's hollow cylindrical portion, connects the outer circumference to the vehicle attachment boss portions, forming closed loops that enhance rigidity and suppress deformation in both vertical and longitudinal directions, thereby improving steering stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a rigid structure steering gearbox is used instead of an elastic member, then steering operation delay is reduced, but deformation at vehicle attachment boss portions occurs leading to reduced steering stability
Solution Approach 1:
The patent applies local quality by adding V-shaped ribs specifically at the vehicle attachment boss portions where deformation occurs, rather than making the entire structure different. The ribs are strategically positioned at locations experiencing high stress during steering operations, providing localized reinforcement to suppress deformation while maintaining the overall rigid structure's quick response characteristics.
Solution Approach 2:
The patent introduces V-shaped ribs that extend in the longitudinal direction of the vehicle, adding a dimensional element to the attachment boss portions. This rib structure creates a three-dimensional reinforcement pattern that resists deformation in multiple directions (vertical and longitudinal) while maintaining the compact design of the original rigid structure.
2Measurement precision
If the steering gearbox has a rigid structure without elastic member, then steering precision is improved, but the vehicle attachment boss portions deform under steering reaction forces
Solution Approach 1:
The patent applies local quality by adding V-shaped ribs specifically at the vehicle attachment boss portions where deformation occurs, rather than making the entire structure different. The ribs are strategically positioned at locations experiencing high stress during steering operations, providing localized reinforcement to suppress deformation while maintaining the overall rigid structure's quick response characteristics.
Solution Approach 2:
The reinforcement structure is segmented into multiple V-shaped ribs distributed at different locations on the hollow cylindrical portion. This segmentation allows the reinforcement function to be distributed across multiple strategic points, effectively combating deformation at various stress concentration areas while maintaining design efficiency.
3Stability of the object's composition
If V-shaped ribs are added to reinforce attachment boss portions, then deformation is suppressed and steering stability is improved, but device complexity increases
Solution Approach 1:
The patent employs V-shaped curved ribs instead of straight rigid reinforcements. The curved geometry of the V-shaped ribs provides effective structural reinforcement while being more compact and aesthetically integrated into the hollow cylindrical portion's curvature. This curved design achieves the same reinforcement effect with a more space-efficient and visually cohesive structure.
Solution Approach 2:
The reinforcement ribs are merged with the hollow cylindrical portion as an integrated structure, forming a unified component rather than separate attached elements. This merging approach simplifies manufacturing and assembly while achieving the reinforcement function, reducing overall device complexity despite adding structural features.
Data Source
AI summary
Even when bending stress acts on a steering gearbox 1 about attachment holes 161 and 171 of vehicle attachment boss portions 16 and 17, deformation of the vehicle attachment boss portions 16 and 17 in both the longitudinal direction and the vertical direction of the vehicle becomes small since rigidity with respect to deformation in the vicinity of the vehicle attachment boss portions 16 and 17 in both the longitudinal direction and the vertical direction of the vehicle is large due to a first rib 61 to a fourth rib 64. Accordingly, it is possible to improve steering stability at the time a steering reaction force occurs.