Lock-up device
US-9945444-B2 · Apr 17, 2018 · US
Spring assembly and lock-up device for torque converter including same
US10274068B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10274068-B2 |
| Application number | US-201715435644-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 17, 2017 |
| Priority date | Mar 25, 2016 |
| Publication date | Apr 30, 2019 |
| Grant date | Apr 30, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A spring assembly for absorbing and attenuating a torsional vibration includes an outer coil spring and an inner coil spring. The inner coil spring is disposed in an interior of the outer coil spring. The inner coil spring has a shorter free length than the outer coil spring. The inner coil spring is chamfered on end surfaces of both ends thereof. The inner coil spring has an outer diameter set to be smaller at least at an endmost winding on each of the ends thereof than at other windings thereof.
First claim
Opening claim text (preview).
What is claimed is: 1. A spring assembly for absorbing and attenuating a torsional vibration, the spring assembly comprising: an outer coil spring; and an inner coil spring disposed in an interior of the outer coil spring, the inner coil spring having a shorter free length than the outer coil spring, the inner coil spring chamfered on two portions of an endmost winding on both ends of the inner coil spring, the two portions opposed across a compression axis of the inner coil spring, the inner coil spring having an outer diameter set to be smaller at least at the endmost winding on each of the ends thereof than at other windings thereof. 2. The spring assembly according to claim 1 , wherein the inner coil spring has a lower surface hardness than the outer coil spring. 3. A spring assembly for absorbing and attenuating a torsional vibration, the spring assembly comprising: an outer coil spring; and an inner coil spring disposed in an interior of the outer coil spring, the inner coil spring having a lower surface hardness than the outer coil spring, the inner coil spring chamfered on two portions of an endmost winding on both ends of the inner coil spring, the two portions opposed across a compression axis of the inner coil spring. 4. The spring assembly according to claim 1 , wherein the outer diameter of the inner coil spring gets smaller toward each of the ends at a plurality of windings on each of the ends. 5. A lock-up device for a torque converter, the lock-up device configured to transmit a power from a front cover to an input shaft of a transmission through a torque converter body including a turbine, the lock-up device comprising: an input rotary member into which the power is inputted from the front cover; an output rotary member coupled to the turbine; a clutch portion mounted between the input rotary member and the output rotary member; and the spring assembly recited in claim 1 , the spring assembly to elastically couple the input rotary member and the output rotary member in a rotational direction.
Assignees
Inventors
Classifications
Torsional springs, e.g. torsion bar or torsionally-loaded coil springs · CPC title
comprising two or more vibration dampers · CPC title
Set of springs, e.g. springs within springs · CPC title
Rotary · CPC title
Torsion · CPC title
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Frequently asked questions
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- What does patent US10274068B2 cover?
- A spring assembly for absorbing and attenuating a torsional vibration includes an outer coil spring and an inner coil spring. The inner coil spring is disposed in an interior of the outer coil spring. The inner coil spring has a shorter free length than the outer coil spring. The inner coil spring is chamfered on end surfaces of both ends thereof. The inner coil spring has an outer diameter set…
- Who is the assignee on this patent?
- Exedy Corp
- What technology area does this patent fall under?
- Primary CPC classification F16H45/02. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 30 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).