Tapered Coupling Structure Eliminates O-Ring Leakage
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Solution Overview
Problem
Conventional tapered coupling structures relying on O-rings for hydraulic pressure face issues with oil leakage and difficulty in decoupling due to O-ring breakage, leading to scratches on the shaft and hub surfaces.
Innovation Solution
A tapered coupling structure with a first oil groove positioned in a region corresponding to the high-rigidity part of the hub, allowing for efficient hydraulic pressure distribution and eliminating the need for O-rings by directing oil to areas of high surface pressure, facilitating coupling and decoupling without O-ring interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If O-rings are used to maintain hydraulic pressure for coupling and decoupling, then hydraulic pressure can be maintained, but oil leakage occurs and surface scratches are caused when O-rings break
Solution Approach 1:
The invention removes the O-ring component from the coupling structure. Instead of using an O-ring to maintain hydraulic pressure, the design relies on the tapered geometry of the shaft and hub配合, eliminating the source of oil leakage and surface damage while maintaining the necessary hydraulic pressure for coupling and decoupling operations
Solution Approach 2:
The invention introduces oil grooves as intermediary structures that guide and contain the hydraulic oil within the coupling interface. These grooves ensure proper oil distribution and pressure maintenance without requiring elastic sealing elements, thereby preventing oil leakage and surface scratches
2Ease of operation
If forced decoupling is performed without proper hydraulic pressure, then decoupling can be attempted, but scratches occur on the outer peripheral surface of the tapered shaft and the inner peripheral surface of the hub
Solution Approach 1:
The invention incorporates oil grooves that are pre-configured to deliver hydraulic oil to the coupling interface before decoupling operations. This preliminary oil delivery ensures that the tapered shaft and hub are properly lubricated and separated with minimal friction, preventing surface scratches during the decoupling process
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 reliable coupling and decoupling of the tapered shaft from the hub without O-rings, reducing the risk of oil leakage and surface damage, while maintaining effective hydraulic pressure for efficient operation.
Implementation Method 1
oil is fed to the coupling surfaces of the tapered shaft and the hub to increase the diameter of the hub, by which coupling and decoupling are enabled
Implementation Method 2
Coupling and decoupling of the coupling structure can also be performed by heating and thermally expanding the hub besides the use of hydraulic pressure
Data Source
AI summary
A tapered coupling structure allows a tapered shaft to be coupled to and decoupled from a hub without the use of an 0-ring. The tapered shaft is provided with a taper part on the side that is coupled to the hub, and the hub is provided with a high-rigidity part having a thickness in the radial direction larger than that of other regions and having a high rigidity in the radial direction. An oil groove formed in the outer peripheral surface of the taper part to feed oil to the coupling surfaces of the taper part and the hub is provided in a region corresponding to the high-rigidity part in the axial direction.