Integrated Centrifugal Pendulum Damper Back Plate Assembly
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Solution Overview
Problem
Existing vibration absorbing mechanisms in torque converters combine elastic and pendulum-type vibration damping functions but face challenges in optimizing their balance, weight reduction, ease of assembly, and cost-effectiveness, with a need for a simplified structure that is easy to assemble and space-efficient.
Innovation Solution
A damper with an integrated centrifugal pendulum-type vibration absorbing device featuring a stepped drive plate, sliding side plate, torsion springs, and a removable back plate with centrifugal pendulum-type vibration absorbing devices, allowing for adjustable vibration absorption and reduced weight, while simplifying assembly and production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional damper structure with torsion springs is used, then torsional vibration absorption is achieved, but the structure is complex and assembly is difficult
Solution Approach 1:
The patent combines the back plate and centrifugal pendulum-type vibration absorbing device into an integrated unit. The back plate serves dual functions as both a structural component and a carrier for the vibration absorbing devices, eliminating the need for separate mounting structures and reducing overall device complexity while maintaining vibration absorption performance
Solution Approach 2:
The back plate is designed to perform multiple functions simultaneously: it provides structural support for the damper assembly, serves as a mounting surface for torsion springs, and carries the centrifugal pendulum-type vibration absorbing devices. This multi-functionality reduces the number of separate components needed in the system
2Reliability
If both elastic vibration reducing mechanism and centrifugal pendulum-type vibration absorbing device are combined, then comprehensive vibration damping is achieved, but weight increases
Solution Approach 1:
The centrifugal pendulum-type vibration absorbing devices are integrated directly onto the back plate, eliminating the need for separate mounting brackets, fasteners, and supporting structures. This integration reduces the total weight of the damper assembly while maintaining both elastic and centrifugal vibration damping functions
Solution Approach 2:
The vibration absorbing functionality is segmented into two distinct mechanisms (torsion springs for elastic damping and centrifugal pendulums for centrifugal damping) that operate independently but are mounted on a common back plate structure, allowing for optimized weight distribution and material usage
3Stability of the object's composition
If the back plate is fixed from the inside, then structural stability is improved, but assembly becomes more difficult
Solution Approach 1:
Instead of fixing the back plate from the inside (centerward), the patent inverts the assembly approach by fixing the back plate from the outside (peripheral side). The centrifugal pendulum-type vibration absorbing devices are mounted first on the peripheral regions of the back plate, and then the back plate is attached to the drive plate, allowing for easier assembly while maintaining structural stability
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 achieves a balanced vibration absorption performance with reduced weight and production costs, improving ease of assembly and operational safety, and enabling selective vibration control across various frequencies.
Implementation Method 1
The pendulum members are subjected to centrifugal force as a result of rapid rotation of the centrifugal pendulum-type vibration absorbing device and move to the outer circumference
Implementation Method 2
A centrifugal pendulum-type vibration absorbing device has a substantially disk-shaped structure in which a pendulum member that can freely move in the radial direction in the manner of a pendulum is disposed
Implementation Method 3
The torsion springs for limiting torsional vibration are generally constructed as an elastic vibration reducing mechanism in view of the structure thereof, and demonstrate their function by using spring resilience to damp pressure resulting from contact of the hub clutch
Implementation Method 4
torsion springs for absorbing torsional vibration are then interposed between the drive plate and the side plate, and torsional vibration is absorbed when torque is transmitted to the hub clutch
Data Source
Figure 1
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Figure 3~4
AI summary
A damper with an integrated centrifugal pendulum-type vibration absorbing device, said damper being equipped with: a drive plate for transmitting engine torque to a transmission, said drive plate being formed in a stepped shape toward the substantially annular outer edge; a substantially annular side plate with which the outermost edge portion of the drive plate makes sliding contact; a substantially annular hub clutch held between the side plate and the relatively inside annular portion of the drive plate; multiple torsion springs, which form circular arcs in portions of a space maintained between the side plate and the relatively inside annular portion of the drive plate and are arranged such that at least one end makes sliding contact with the hub clutch; a back plate, which grips the side surfaces of the multiple torsion springs, and is connected to the drive plate so as to be removable from the outside of the drive plate in the rotational axis direction; a substantially disc-shaped and substantially circular back plate, on the outer circumferential side of which centrifugal pendulum-type vibration absorbing devices are mounted; and centrifugal pendulum-type vibration absorbing devices, which are mounted on the outer circumferential side of the back plate.