Damper Device Slide Spring for Stable Resistance
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Solution Overview
Problem
In damper devices with an intermediate plate disposed on the inner peripheral side, the wave spring is inevitably rotated between the input-side rotary member and the intermediate plate, leading to unstable generation of slide resistance due to the alignment of spring receiving parts in the circumferential direction.
Innovation Solution
A damper device design where a slide spring is axially positioned between the input-side rotary member and the intermediate member, allowing it to slide against the first rotary member while being restricted from circumferential movement, thereby generating stable slide resistance. This configuration includes a wave spring that contacts both the input and intermediate members, ensuring consistent resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the intermediate plate is disposed on the inner peripheral side with spring receiving parts aligned in the circumferential direction, then the device structure is simplified, but the wave spring is inevitably rotated between the input-side rotary member and the intermediate plate, leading to unstable slide resistance generation
Solution Approach 1:
A dedicated slide spring is introduced as an intermediary component between the input-side rotary member and the intermediate plate. This slide spring specifically generates slide resistance through controlled sliding contact, while the wave spring focuses on absorbing torsional vibrations. The separation of functions between these two spring components resolves the conflict by providing stable slide resistance generation without requiring the intermediate plate to bear this function, thus maintaining structural simplicity while improving reliability.
2Force
If the wave spring is disposed axially between the input-side rotary member and the intermediate plate, then slide resistance can be generated, but the wave spring rotates during operation due to circumferential alignment of spring receiving parts, causing unstable resistance generation
Solution Approach 1:
The damper device segments the functions of the two springs: the wave spring is dedicated to torsional vibration absorption through its characteristic wave-shaped structure, while a separate slide spring is introduced specifically for generating stable slide resistance. This functional segmentation allows each component to perform its designated function optimally without interference, resolving the instability caused by the wave spring's rotational movement.
Solution Approach 2:
The slide spring acts as an intermediary component that specifically handles the slide resistance generation function. By separating this function from the wave spring, the system achieves stable slide resistance generation while the wave spring focuses on its primary function of torsional vibration absorption, eliminating the rotational instability issue.
3Productivity
If spring receiving parts of the output-side rotary member and intermediate plate are aligned in the circumferential direction, then power transmission is efficient, but the wave spring must rotate to accommodate the alignment, preventing stable slide resistance generation
Solution Approach 1:
The system segments the functional responsibilities: the circumferential alignment of spring receiving parts optimizes power transmission efficiency through the wave spring, while a separate slide spring is introduced to handle slide resistance generation. This segmentation allows the wave spring to maintain its optimized position for power transmission without compromising slide resistance 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 design effectively stabilizes slide resistance generation, ensuring consistent performance even when the intermediate member is axially moved due to torque variations, by maintaining contact between the wave spring and the input rotary member.
Implementation Method 1
the slide spring is configured to slide against the first rotary member... slide resistance is generated between the wave spring and both of the input-side rotary member and the intermediate plate
Implementation Method 2
a plurality of coil springs to be compressed between the first side plate and the center plate... to attenuate rotary vibrations
Implementation Method 3
the wave spring is disposed axially between the input-side rotary member and the intermediate plate, and thus, slide resistance is generated between the wave spring and both of the input-side rotary member and the intermediate plate
Data Source
AI summary
A damper device includes a first rotary member, a second rotary member, a plurality of coil springs, an intermediate member and a slide spring. The first rotary member is a member into which a power of an engine is inputted. The second rotary member is disposed to be rotatable with respect to the first rotary member. The plurality of coil springs are configured to be compressed between the first rotary member and the second rotary member. The intermediate member is configured to engage the plurality of coil springs and couple the plurality of coil springs together. The slide spring is disposed axially between the first rotary member and the intermediate member. The slide spring is configured to slide against the first rotary member. The slide spring is configured not to slide with respect to the intermediate member.