Shift Lever Assembly Fastening Member Design
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Solution Overview
Problem
Manual transmission shift lever assemblies are prone to excessive components, vibration, and noise due to simple bolt and nut assembly methods, which compromise their structural integrity and efficiency.
Innovation Solution
A shift lever assembly featuring a shift lever housing with a rotatable shift lever, a base bracket fixed to the vehicle body, and a bar-shaped fastening member that penetrates through both components, supported by an elastic body with indentation grooves, reducing the number of components and enhancing rigidity and noise resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple bolt and nut assembling method is used to connect the shift lever housing and base bracket, then the assembly process is simple, but the number of components increases and the structure becomes vulnerable to vibration and noise
Solution Approach 1:
The fastening member integrates multiple functions: it acts as both a connecting element and a fixing element, eliminating the need for separate bolts and nuts. The single bar-shaped fastening member combines the roles of multiple fastening components, reducing part count while maintaining assembly simplicity.
Solution Approach 2:
The fastening member serves multiple purposes simultaneously: it connects the shift lever housing to the base bracket, provides structural support, and ensures stable operation. This multi-functional design replaces several specialized components with one universal element.
2Ease of manufacture
If a simple bolt and nut assembling method is used to connect the shift lever housing and base bracket, then the assembly process is simple, but the structure becomes vulnerable to vibration and noise
Solution Approach 1:
The fastening member integrates multiple functions: it acts as both a connecting element and a fixing element, eliminating the need for separate bolts and nuts. The single bar-shaped fastening member combines the roles of multiple fastening components, reducing part count while maintaining assembly simplicity.
Solution Approach 2:
The fastening member features a curved upper surface that conforms to the contour of the shift lever housing, ensuring stable contact and reducing vibration. The curved design provides better surface area contact compared to flat fasteners, enhancing stability and noise resistance.
3Reliability
If multiple fastening components are used to ensure stability, then vibration and noise resistance improves, but the number of components increases
Solution Approach 1:
The fastening member integrates multiple functions: it acts as both a connecting element and a fixing element, eliminating the need for separate bolts and nuts. The single bar-shaped fastening member combines the roles of multiple fastening components, reducing part count while maintaining assembly simplicity.
Solution Approach 2:
The fastening member features a curved upper surface that conforms to the contour of the shift lever housing, ensuring stable contact and reducing vibration. The curved design provides better surface area contact compared to flat fasteners, enhancing stability and noise resistance.
4Device complexity
If the fastening member is supported without a separate fixing member, then the number of components is reduced, but the structural support may be insufficient
Solution Approach 1:
The fastening member features a curved upper surface that conforms to the contour of the shift lever housing, ensuring stable contact and reducing vibration. The curved design provides better surface area contact compared to flat fasteners, enhancing stability and noise resistance.
Solution Approach 2:
The fastening member is designed to be self-supporting, with its own structural geometry providing the necessary support without requiring additional fixing members. The bar-shaped design with appropriate dimensions and curvature enables it to maintain structural integrity independently.
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 minimizes the number of components, increases rigidity and noise resistance, and facilitates easier assembly, thereby improving the structural integrity and operational efficiency of the manual transmission system.
Implementation Method 1
An elastic body may be disposed between the fastening member and the shift lever housing or between the fastening member and the base bracket
Data Source
AI summary
A shift lever assembly may include a shift lever housing having a shift lever rotatably coupled thereto in a shift direction, a front and back direction of a vehicle, and a select direction, a left and right direction of the vehicle; a base bracket configured to be coupled to the shift lever housing and fixedly disposed on a vehicle body; and a fastener configured to extend in the shift direction to couple the shift lever housing and the base bracket to each other.