Vehicle Clutch Displacement Conversion for Torque
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Solution Overview
Problem
Conventional vehicle clutches face a trade-off between volume and torque transmission capacity, requiring larger sizes and more force to transmit torque, which increases the size and power needed for the actuator.
Innovation Solution
A compact clutch design featuring a hub, sleeve, and clutch ring with displacement converting portions and chamfered protrusions that convert rotational displacement into axial linear displacement, reducing the required driving force and enabling efficient torque transmission with a smaller system size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the volume of the clutch is increased to obtain a larger torque transmission capacity, then the torque transmission capacity is improved, but the volume increases
Solution Approach 1:
The patent converts rotational displacement into axial linear displacement through the displacement converting portions, effectively utilizing a different dimensional approach to amplify the actuating force. This allows the clutch to achieve high torque transmission capacity without proportionally increasing its volume, as the force amplification is achieved through geometric conversion rather than simply scaling up the clutch size.
Solution Approach 2:
The patent changes the physical state and parameters of the clutch ring by pressing it against the clutch member with increased force through the displacement converting portions. By modifying the contact pressure and friction parameters between the clutch ring and clutch member, the system achieves enhanced torque transmission capacity within a compact volume.
2Power
If the amount of force actuating the clutch is increased to transmit a large amount of torque, then the torque transmission capacity is improved, but the size of the actuator must be increased
Solution Approach 1:
The displacement converting portions amplify the actuating force through geometric conversion, changing the force parameter efficiently. This allows the actuator to be smaller in size while still generating sufficient pressing force on the clutch ring, as the force amplification is achieved through the mechanical conversion mechanism rather than requiring a larger actuator.
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 design achieves a large torque transmission capacity while minimizing the size and power of the actuator, allowing for a more compact and efficient clutch system with reduced driving force requirements.
Implementation Method 1
the clutch ring transmits torque using frictional force formed between the clutch ring and the clutch member
Data Source
AI summary
A clutch for a vehicle includes a hub disposed on a rotary shaft such that a rotation thereof is restricted, a sleeve spline-coupled to an outer circumference of the hub, a clutch member disposed on the rotary shaft, and a clutch ring disposed between the clutch member and the hub, wherein the clutch ring is pressed against the clutch member by the sleeve and the hub, wherein the clutch ring comprises a pressed part to which an amount of force pressing against the clutch member is applied from the sleeve and the hub, the sleeve comprises pressing protrusions that transfer the axial driving force of the sleeve to the pressed part, and the hub comprises displacement converting portions that convert a relative rotational displacement with respect to the clutch ring into an axial linear displacement of the clutch ring.