Cardan Yoke Shaft Conical Neck Structure for Strength and Weight
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Solution Overview
Problem
Current cardan shaft designs, particularly in the neck section where the yoke shaft and tube sleeve interface, face challenges in achieving strength and lightness while minimizing production costs and environmental impact, as the induction process for strengthening increases material usage, energy consumption, and shipping difficulties.
Innovation Solution
A simplified neck section design featuring a solid cone form that narrows inwardly from the protective cover insertion diameter to the neck, with a mating surface that restricts the tube sleeve, eliminating the need for the induction process and reducing the diameter, thereby enhancing strength and reducing material and energy costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the induction process is applied to strengthen the neck section, then the strength is improved, but the weight increases and production cost increases
Solution Approach 1:
The invention changes the geometric parameters of the neck section by introducing a conical surface with specific inclination angle (α) between 15-45 degrees. This parameter change optimizes the stress distribution and structural strength without requiring induction hardening, thereby avoiding the weight increase and additional costs associated with the induction process while maintaining adequate strength through improved geometry
2Strength
If the induction process is applied to strengthen the neck section, then the strength is improved, but the production cost increases
Solution Approach 1:
The invention modifies the geometric parameters of the neck section by introducing a conical surface with specific inclination angle (α) between 15-45 degrees. This parameter change optimizes the stress distribution and structural strength without requiring induction hardening, thereby avoiding the additional production costs associated with the induction process while maintaining adequate strength through improved geometry
Solution Approach 2:
The invention extracts and eliminates the induction hardening process from the manufacturing sequence. By redesigning the neck section geometry with a conical surface, the patent removes the need for this additional strengthening process, thereby reducing production costs and simplifying manufacturing while maintaining structural integrity
3Strength
If the neck diameter is increased to provide strength, then the strength is improved, but the shipping cost increases
Solution Approach 1:
The invention changes the geometric parameters of the neck section by introducing a conical surface with specific inclination angle (α) between 15-45 degrees. This parameter change optimizes the stress distribution and structural strength without requiring induction hardening, thereby avoiding the weight increase and additional costs associated with the induction process while maintaining adequate strength through improved geometry
4Ease of manufacture
If the neck section design is simplified, then the manufacturing is easier, but the strength may be compromised
Solution Approach 1:
The invention changes the geometric parameters of the neck section by introducing a conical surface with specific inclination angle (α) between 15-45 degrees. This parameter change optimizes the stress distribution and structural strength without requiring induction hardening, thereby avoiding the weight increase and additional costs associated with the induction process while maintaining adequate strength through improved geometry
Data Source
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AI summary
A yoke shaft (1) comprises solid cone (4.8) narrowing at a certain inclination between a protective cover insertion diameter (4.1) and a neck (4.7) and extending in conic form and restricting a tube sleeve (6) on its inclined body and at least one mating surface (4.9) on a solid cone (4.8) wherein the tube sleeve (6) of the tube inner chamfer (6.2) contacts and is limited to provide an embodiment of neck section (4) by achieving a simpler, lighter and more durable structure, combining yoke part (2) and shaft part (3) of yoke shaft (1) of cardan shaft (10) used for vehicle moving upon transmitting engine rotational motion and power to differential in motor vehicles.