Centrifugal Pendulum Wave Spring Washer Mounting Simplification
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Solution Overview
Problem
The manufacturing of spring washers for centrifugal pendulum devices is complex due to the intricate support geometry, requiring complicated tools and increasing production costs.
Innovation Solution
The spring washer is connected to a carrier-fixed component that protrudes axially towards the pendulum mass, allowing for simpler attachment without additional tabs, using a spacer bolt or connecting element, and can be secured through various methods like adhesive, welding, or form-fitting connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring washer is designed with additional axially projecting tabs for attachment, then the spring washer can be securely fastened to the carrier, but the manufacturing complexity and cost increase significantly
Solution Approach 1:
The attachment function is segmented from the spring washer body and transferred to a separate carrier-fixed component. The spring washer becomes a simple annular element without tabs, while the carrier-fixed component provides the attachment structure through its axially protruding design that receives the spring washer.
Solution Approach 2:
The complex attachment geometry (tabs) is extracted from the spring washer and relocated to a dedicated carrier-fixed component. This allows the spring washer to be manufactured as a simple annular part while the attachment functionality is provided by the carrier-fixed component with its axially protruding structure.
2Reliability
If the spring washer is directly attached to the carrier with complex support geometry, then the spring washer can be securely mounted, but the number of components and assembly steps increase
Solution Approach 1:
The spring washer attachment function is merged with the carrier-fixed component. The carrier-fixed component's axially protruding structure integrates the mounting functionality, eliminating the need for separate tabs on the spring washer and reducing the overall component count and assembly complexity.
Solution Approach 2:
The carrier-fixed component serves multiple functions: it provides structural support to the carrier, provides the attachment interface for the spring washer through its axially protruding design, and simplifies the overall assembly by combining what would otherwise be separate attachment elements.
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
This simplifies the manufacturing process, reduces the number of components, and maintains the spring washer's deflection and axial force functionality, thereby lowering production costs and assembly time.
Implementation Method 1
a corrugated spring washer (7a, 7b), wherein the spring washer is rotatably connected to a fastening area (8) with the carrier... the spring washer is simply hung on the component that is fixed to the carrier... maintains the spring washer's deflection and axial force functionality
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
The invention relates to a centrifugal pendulum device (1) for a powertrain of a motor vehicle, comprising a support (3) which can be rotated about a rotational axis (2), a pendulum mass (5) which is received on the support (3) so as to swing along a slotted guide track (4) such that a restoring torque which is oriented against a rotational irregularity is generated by the pendulum mass (5) during operation, a contact element (6) which rests against the pendulum mass (5) in a relatively movable manner, and a wave spring washer (7a, 7b) which presses the contact element (6) against the pendulum mass (5) in the axial direction of the rotational axis (2), wherein the spring washer (7a, 7b) is rotationally fixed to the support (3) at a securing region (8), and the securing region (8) of the spring washer (7a, 7b) is connected to a component (9) which is fixed to the support and protrudes in the axial direction towards the pendulum mass (5). The invention additionally relates to a clutch disc (20) and to a powertrain comprising said centrifugal pendulum device (1).