Radial Booster Clutch Layout for Compact Torque Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing booster clutches require a large axial installation space and are difficult to control, leading to delays in closing and opening processes and undesirable vibrations in the drive train.
Innovation Solution
A booster clutch with a rotational axis for a drive train, featuring a pilot-control clutch with a friction pack, rocker elements, rollers, and energy storage elements, which allows for efficient torque transmission with reduced pressing force and minimal axial installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional booster clutches with leaf spring systems or ball ramp systems are used, then high torque transmission is achieved, but large axial installation space is required
Solution Approach 1:
The patent transitions from axial force application (traditional leaf spring/ball ramp systems) to radial force application through the drum brake mechanism. The rocker elements convert radial motion into torque transmission, fundamentally changing the dimensional approach from axial to radial, thereby reducing axial installation space while maintaining torque transmission capability
Solution Approach 2:
The patent replaces the traditional mechanical leaf spring system or ball ramp system with a drum brake mechanism combined with rocker elements. This substitution introduces a new mechanical principle where friction between the drum and rocker elements generates the necessary forces for torque transmission, eliminating the need for large axial space required by conventional systems
2Force
If traditional booster clutches are used, then torque transmission is achieved, but control delays and vibrations occur
Solution Approach 1:
The patent employs dynamic elements including the rocker elements that can pivot and the drum that can rotate, allowing the system to respond dynamically to control inputs. The friction-based drum brake mechanism provides smooth, progressive engagement and disengagement, eliminating the abrupt transitions and vibrations associated with traditional mechanical systems
Solution Approach 2:
The patent utilizes friction as a controllable parameter between the drum and rocker elements. By adjusting the normal force applied to the drum, the friction force can be precisely controlled, enabling smooth modulation of torque transmission without the control delays and vibrations inherent in traditional mechanical engagement systems
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 booster clutch achieves high torque transmission with reduced pressing force, minimal axial installation space, and almost hysteresis-free torque transmission, while maintaining continuous controllability of the maximum transmittable torque.
Implementation Method 1
a friction pack (5), the friction pack having a pilot-control input side (6) and a pilot-control output side (7), and, in a pressed state between the pilot-control input side (6) and the pilot-control output side (7), a torque can be transmitted in a frictional manner
Implementation Method 2
at least one roller (13), which is arranged in a torque-transmitting manner via a ramp pairing (14) between a corresponding one of the rocker elements (11) and the booster input side (10) or the booster output side (8)
Implementation Method 3
at least a first energy storage element (15). The at least one first energy storage element (15) either: is arranged in a torque-transmitting manner between a corresponding one of the rocker elements (11) and the booster output side (8) or the booster input side (10)
Implementation Method 4
a drum (16), and, when a predetermined torque is applied across the booster input side (10) and the booster output side (8) as a result of a rolling of the at least one roller (13) on the ramp pairing (14), the at least one rocker element (11) is pressed radially against the drum (16)
Data Source
AI summary
A booster clutch includes a pilot-control clutch, a booster output side, a booster input side, a rocker element, a first energy storage element and a drum. The pilot-control clutch has a friction pack and a torque is frictionally transmittable when the friction pack is in a pressed state. The booster output side is torsionally fixed to a pilot-control input side and the booster input side is arranged to be torsionally fixed to an input shaft. The first roller is arranged via a ramp pairing between the rocker element and the booster input or output side. The first energy storage element is arranged between the rocker element and the booster output or input side, or is arranged to transmit a radial force to the rocker element. The first roller applies a predetermined torque over the booster input and output side, and presses the rocker element radially against the drum.