Differential Screw Torque Transmission Apparatus
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Solution Overview
Problem
Existing torque transmission systems for vehicles are complex, bulky, and heavy due to separate mechanisms for rotational speed reduction and rotation-to-thrust conversion, making them inefficient in terms of size and weight.
Innovation Solution
A torque transmission apparatus utilizing a differential screw mechanism to convert rotational force into thrust, eliminating the need for additional reduction mechanisms and integrating a clutch unit and rotational actuator for efficient torque transmission between rotary members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate reduction gears and ball cam mechanisms are used for rotational speed reduction and rotation-to-thrust conversion, then the torque transmission function is achieved, but the apparatus becomes complicated, bulky, and heavy
Solution Approach 1:
The patent combines the reduction gear mechanism and the ball cam mechanism into a single integrated differential screw mechanism. The screw thread acts as both the reduction mechanism and the ball cam, eliminating the need for separate components. This merging of functions directly reduces structural complexity while maintaining the torque transmission capability through the unified differential screw mechanism.
2Reliability
If separate reduction gears and ball cam mechanisms are used, then the torque transmission function is achieved, but the apparatus becomes bulky and heavy
Solution Approach 1:
The patent merges multiple mechanisms into a single differential screw mechanism, eliminating redundant components. By integrating the reduction gear and ball cam functions into one unified structure, the overall mass of the apparatus is reduced while maintaining full torque transmission functionality through the screw thread mechanism.
3Reliability
If separate reduction gears and ball cam mechanisms are used, then the torque transmission function is achieved, but the apparatus becomes complicated and bulky
Solution Approach 1:
The patent integrates the reduction gear mechanism and ball cam mechanism into a single differential screw mechanism. The screw thread simultaneously performs both functions, eliminating the need for separate spatial arrangements of multiple components. This consolidation reduces the overall volume occupied by the apparatus while preserving complete torque transmission capability.
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 results in a simpler, smaller, and lighter torque transmission system that efficiently converts rotational force into thrust, enhancing the vehicle's power transmission efficiency and reducing overall system complexity.
Implementation Method 1
a differential screw mechanism (53) to convert rotational force into the thrust applied to the clutch unit (51)
Data Source
AI summary
The torque transmission apparatus is simple, small and light and has a clutch unit to receive thrust and transmit torque between rotary members, a differential screw mechanism to convert rotational force into the thrust applied to the clutch unit, and an electric motor to produce the rotational force. The differential screw mechanism has a driving screw and driven screws. The driving screw is rotatably and axially movably supported on a rotary drive shaft of the electric motor. The driven screws mesh with the driving screw and are rotatably and axially immovably supported. The meshing driving screw and driven screws are rotated to axially move the driving screw and apply engaging force to the clutch unit.