Belt pulley structure of engine

Patent metadata

Field	Value
Publication number	US-11512768-B2
Application number	US-201916513331-A
Country	US
Kind code	B2
Filing date	Jul 16, 2019
Priority date	Feb 21, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A belt pulley structure of an engine is provided to prevent abnormal noise from generating between a belt pulley and a torsional vibration damper. The belt pulley structure includes a stepped portion that is formed in a shape that blocks a cavity in a radial direction thereof. The cavity is formed at a portion where a belt pulley and a torsional vibration damper face each other.

First claim

What is claimed is:

1. A belt pulley structure of an engine, comprising:
a stepped portion formed in a shape that blocks a cavity in a radial direction, wherein the cavity is provided at a portion where a belt pulley and a torsional vibration damper face each other;
an inertial ring coupled to the torsional vibration damper along a circumferential direction thereof;
wherein the stepped portion is formed to be stepped at one surface of the inertial ring with a protruding shape that extends towards the belt pulley;
a pulley decoupler coupled to the belt pulley;
a damper rubber disposed on an inner side of the inertial ring; and
a damper hub disposed on an inner side of the damper rubber, wherein the damper hub is directly coupled to the pulley decoupler;
wherein the cavity generates resonance due to vibration of the engine and the pulley decoupler in a specific frequency band; and
wherein sound waves generated by the cavity are blocked by the stepped portion.

2. The belt pulley structure of the engine of claim 1 , wherein the torsional vibration damper is coupled to the belt pulley in an axial direction thereof and the stepped portion is formed at the torsional vibration damper to protrude toward the belt pulley.

3. The belt pulley structure of the engine of claim 2 , wherein the cavity is formed between one surface in an axial direction including a rim of one end portion of the belt pulley and the torsional vibration damper facing the one surface and the stepped portion is formed in a protruding shape to cover an inlet of the cavity.

4. The belt pulley structure of the engine of claim 3 , wherein the stepped portion is formed in a shape that covers the rim of the one end portion of the belt pulley.

5. The belt pulley structure of the engine of claim 4 , wherein the stepped portion is formed with a predetermined gap in a radial direction from the rim of the one end portion of the belt pulley.

6. The belt pulley structure of the engine of claim 1 , wherein
the torsional vibration damper is coupled to the pulley decoupler.

7. A vehicle having a belt pulley structure according to claim 1 .

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Song Sun Young
• Moon Jung Hwan

Classifications

• F16F15/1442

  with a single mass · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title

• F16H2055/366

  with means providing resilience or vibration damping · CPC title

• F16F15/124

  Elastomeric springs (F16F15/123, {F16F15/127} take precedence) · CPC title

• F16F15/10

  Suppression of vibrations in rotating systems by making use of members moving with the system (by balancing F16F15/22 {; yielding couplings F16D3/00} ; with flywheels acting variably or intermittently F16H {; construction providing resilience or vibration-damping for gear elements F16H55/14}) · CPC title