Torsional Damper Angular Deflection Stops
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Solution Overview
Problem
Existing torsion dampers for motor vehicle clutches face issues with premature wear and reduced performance due to excessive torque causing fatigue in helical springs, and limitations in angular displacement adjustment.
Innovation Solution
The use of separate series of stops on guide washers and the annular web to limit relative angular deflections in different directions of rotation, allowing for adjustable clearance and easy replacement of wear-prone parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If oblong openings are made in guide washers to limit angular displacement, then the maximum angular movement is controlled, but the position and length of openings are limited reducing the guide washers strength
Solution Approach 1:
The limitation mechanism is segmented into two independent series of stops: one series for limiting angular displacement in the forward direction, and another series for the reverse direction. This segmentation allows each series to be optimally positioned without compromising guide washer strength, as stops are distributed rather than concentrated in a single oblong opening configuration.
Solution Approach 2:
Different regions of the guide washers and annular web are assigned different functions: some areas contain stops for limiting angular displacement in one direction, while other areas contain stops for the opposite direction. This local differentiation allows optimal placement of stops to provide both angular control and maintain structural strength.
2Stability of the object's composition
If cutouts are made above the springs to limit angular movement, then the angular displacement is controlled, but the springs must be brought closer to the center hub reducing performance
Solution Approach 1:
The angular limitation function is segmented into two separate series of stops positioned at different locations. This eliminates the need for a single cutout above the springs that would force them closer to the hub, thereby maintaining spring performance while achieving angular control.
Solution Approach 2:
Instead of using cutouts in the radial plane that constrain spring positioning, the invention uses axially extending stops that limit angular displacement in a different dimensional approach, allowing springs to maintain their optimal position and performance.
3Device complexity
If a single series of stops is used to limit angular deflection, then the structure is simple, but the angular movement allowed is limited due to opening position constraints
Solution Approach 1:
The stop mechanism is divided into two independent series, each handling one direction of rotation. This segmentation enables greater total angular movement capability compared to a single series, while maintaining relatively simple construction through the use of axially extending stops that are easy to manufacture and install.
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 solution enhances the torsion damper's performance by allowing adjustable angular displacement, reducing wear, and enabling the use of the same components in various applications, thereby extending service life and improving torque handling.
Implementation Method 1
elastic members and friction means mounted between the guide washers and the annular web to absorb and dampen vibrations and rotational acyclisms
Implementation Method 2
elastic members and friction means mounted between the guide washers and the annular web to absorb and dampen vibrations and rotational acyclisms
Implementation Method 3
the relative angular deflections of the guide washers and of the annular web being limited by stops of the guide washers, which come to bear on projecting parts of the annular web
Data Source
Figure 1
Figure 2
Figure 3~6
AI summary
The invention relates to a torsional damper (1), including a hub (2) coupled to a radial annular web (6), two guide rings, resilient members (9), and friction means, the relative angular ranges of movement of the guide rings and annular web (6) being limited, in a first direction of rotation (D) by a first series of abutments (23) for the guide rings, which engage with a first series of projecting portions (25) of the annular web (6), and in a second direction of rotation (R) by a second series of abutments (24) for the guide rings, which engage with a second series of projecting portions (26) of the annular web (6).