Output Sprocket Axial Force Absorption via Coned Disk Spring
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Solution Overview
Problem
The existing output sprocket wheel attachment structure for internal combustion engines cannot absorb axial force components, leading to unstable power transmission due to its inability to move in the axial direction and absorb forces caused by chain wrapping and waves.
Innovation Solution
An attachment structure incorporating a coned disk spring, cap nut, and annular spacer, which allows the output sprocket wheel to move axially while being pressed by the coned disk spring, absorbing axial force components and maintaining stable power transmission without direct tightening, and utilizing DLC-coated spacers to reduce friction and improve rotation smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the output sprocket wheel is fixed rigidly to prevent axial movement, then positioning accuracy is improved, but the ability to absorb axial force components deteriorates
Solution Approach 1:
The patent transitions from a rigid fixed connection to a dynamic elastic connection using a disk spring. The disk spring allows the output sprocket wheel to have controlled axial movement capability while maintaining positioning within an acceptable range, enabling the system to adapt to axial force variations without compromising power transmission stability.
Solution Approach 2:
The patent changes the physical state of the connection from rigid to elastic by introducing a disk spring. This parameter change allows the connection to exhibit both positioning functionality and force absorption capability, resolving the contradiction between positioning accuracy and reliability.
2Reliability
If the output sprocket wheel is allowed to move axially to absorb force components, then power transmission stability is improved, but positioning control deteriorates
Solution Approach 1:
The disk spring provides a dynamic elastic connection that permits controlled axial movement for force absorption while maintaining the sprocket wheel within an acceptable positioning range. This dynamic approach simultaneously achieves both reliability improvement and positioning control.
3Manufacturing precision
If a rigid fixation structure is used to secure the output sprocket wheel, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the attachment function into two separate components: the disk spring handles force absorption and positioning, while the cap nut provides simple axial constraint. This segmentation achieves both positioning accuracy and force absorption with a relatively simple overall structure.
Solution Approach 2:
The disk spring acts as an intermediary element between the output sprocket wheel and the cap nut, providing elastic compliance that enables both positioning and force absorption functions without requiring a complex rigid fixation structure.
4Device complexity
If the output sprocket wheel is directly tightened and fixed, then device complexity is reduced, but the ability to absorb axial forces deteriorates
Solution Approach 1:
The disk spring serves as an intermediary that enables force absorption functionality while maintaining a relatively simple attachment structure. The cap nut simply provides axial constraint, while the disk spring handles the complex function of elastic compliance and force absorption.
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 enables stable power transmission by allowing the output sprocket wheel to maintain its required axial position and absorb axial force components, ensuring consistent power delivery while minimizing friction and wear.
Implementation Method 1
a force component which is applied to the output sprocket wheel (32) and is deflected in the axial direction is absorbed by the coned disk spring (34)
Implementation Method 2
the spacer (35), which is formed by applying DLC working
Data Source
AI summary
An output sprocket wheel attachment structure includes a coned disk spring fitted with an output power shaft is abutted with and positioned by a stepped portion. An output sprocket wheel spline-fitted with spline grooves formed at an outer side portion of the output power shaft with respect to the stepped portion is pressed by the coned disk spring. A cap nut which engages with male threads formed at an end portion of the output power shaft is restricted and fixed at a bottom face thereof by and to an axial end of the output power shaft. Movement in an axial direction of the output sprocket wheel pressed by the coned disk spring is restricted by an opening end portion of the cap nut.