Torsional damper with independently rotating inertia masses and crankshaft to which the torsional damper with independently rotating inertia masses is applied

Patent metadata

Field	Value
Publication number	US-9835226-B2
Application number	US-201514955959-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Sep 3, 2015
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A torsional damper with independently rotating inertia masses, wherein an inner inertia ring is located at an inner diameter portion of an outer inertia ring in an internal chamber defined by coupling of a case, so that the inner and outer inertia rings form a dual concentric circle, through which an axial hole is formed to a cover, the inner inertia ring is moved relative to rotation of the case, and then the outer inertia ring is moved relative thereto.

First claim

What is claimed is:

1. A torsional damper, comprising:
an inner inertia ring located at an inner diameter portion of an outer inertia ring in an internal chamber defined by coupling of a case to a cover, so that the inner and outer inertia rings form a dual concentric circle through which an axial hole is formed, wherein the inner inertia ring is moved relative to rotation of the case, and then the outer inertia ring is moved relative thereto,
wherein the inner inertia ring is supported by an inner bearing to be coupled to an inner portion of the case, and the outer inertia ring is supported by an outer bearing to be coupled to the inner inertia ring, and
wherein the inner and outer inertia rings are supported in axial directions thereof by thrust bearings.

2. The torsional damper of claim 1 , wherein the inner and outer inertia rings are made of materials having different specific gravities.

3. The torsional damper of claim 2 , wherein the specific gravity of the outer inertia ring is greater than that of the specific gravity of the inner inertia ring.

4. The torsional damper of claim 1 , wherein oil is injected into the internal chamber, and a gap defined by the inner and outer inertia rings and the internal chamber is filled with the oil.

5. The torsional damper of claim 4 , wherein the oil is silicon oil.

6. A crankshaft comprising:
a torsional damper comprising a case and a cover coupled to each other to define an internal chamber, inner inertia ring and outer inertia ring forming a dual concentric circle in the internal chamber such that, when the case rotates, the respective inner inertia ring and outer inertia ring are moved relative to the rotation of the case, and silicon oil with which a gap defined by the inner inertia ring and outer inertia ring and the internal chamber is filled; and
a crank nose connected to the torsional damper so as to transfer a rotational force of the crankshaft generated when an engine is operated,
wherein the inner inertia ring is supported by an inner bearing to be coupled to an inner portion of the case, and the outer inertia ring is supported by an outer bearing to be coupled to the inner inertia ring, and
wherein the inner and outer inertia rings are supported in axial directions thereof by thrust bearings.

7. The crankshaft of claim 6 , wherein the crank nose is integrated with the case and the cover of the torsional damper.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Son Sang-Chul

Classifications

• F16C3/06

  Crankshafts · CPC title

• F16F15/1407 Primary

  the rotation being limited with respect to the driving means · CPC title

• F16F15/30 Primary

  Flywheels (F16F15/16, F16F15/28 take precedence; suppression of vibrations in rotating systems using elastic members or friction-damping members moving with the system, {i.e. split flywheels or single masses connected to a hub by elastic members or friction-damping members} F16F15/12; rotary-body aspects in general F16C13/00, F16C15/00) · CPC title

• F16F2222/08

  Inertia · CPC title

• F16F15/173 Primary

  provided within a closed housing {(F16F15/36 takes precedence)} · CPC title