Damper isolator with magnetic spring

Patent metadata

Field	Value
Publication number	US-2016195162-A1
Application number	US-201514966505-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Dec 12, 2014
Publication date	Jul 7, 2016
Grant date	—

Abstract

Damper-isolators are disclosed that have a hub defining a bore for receiving a shaft, a pulley body mated to the hub to collectively define a magnet track that is concentric about the bore, a damper assembly operatively disposed between the hub and a belt engaging portion of the pulley body, a first magnet positioned within the magnet track and connected to the hub for rotation therewith, and a second magnet positioned within the magnet track and connected to the pulley body for rotation therewith. The first magnet and the second magnet are positioned with like polarities facing one another. A front end accessory drive system having one of the damper-isolators is also disclosed.

First claim

What is claimed is:

1 . A damper-isolator comprising:
a hub defining a bore therethrough for receiving a shaft; a pulley body mated to the hub to collectively define a magnet track that is concentric about the bore of the hub; a damper assembly operatively disposed between the hub and a belt engaging portion of the pulley body; a first magnet positioned within the magnet track and connected to the hub for rotation therewith; and a second magnet positioned within the magnet track and connected to the pulley body for rotation therewith; wherein the first magnet and the second magnet are positioned with like polarities facing one another.

2 . The damper-isolator of claim 1 , wherein the damper assembly comprises:
an elastomeric damper member radially outward and concentric about the hub; and an inertia member seated against the elastomeric damper member thereby operably coupling the inertia member to the hub for rotation therewith.

3 . The damper-isolator of claim 1 , comprising a plurality of first magnets and a plurality of second magnets, wherein the plurality of first magnets are positioned in an alternating fashion relative to the plurality of second magnets within the magnet track.

4 . The damper-isolator of claim 1 , wherein the first magnet is evenly spaced apart from the second magnet within the magnet track.

5 . The damper-isolator of claim 1 , wherein the hub further comprises a first pocket in which the first magnet is seated and the pulley body further comprises a second pocket in which the second magnet is seated.

6 . The damper-isolator of claim 5 , wherein the first pocket is defined by a pair of first partitions within the magnet track and the second pocket is defined by a pair of second partitions within the magnet track.

7 . The damper-isolator of claim 1 , wherein the first magnet is connected to the hub by a first fastener, and the second magnet is connected to the pulley body by a second fastener.

8 . The damper-isolator of claim 7 , wherein at least one of the first fastener and the second fastener comprises a ferromagnetic material.

9 . The damper-isolator of claim 1 , further comprising a slide bearing disposed between mating radially facing surfaces of the hub and the pulley body that are rotatable relative to one another.

10 . The damper-isolator of claim 1 , wherein the hub and the pulley body, collectively, define a first clearance gap between the first magnet and the pulley body and a second clearance gap between the second magnet and the hub along the respective line of travel of each within the magnet track.

11 . The damper-isolator of claim 1 , wherein the hub and the pulley body are each formed of a non-ferromagnetic material.

12 . A front end accessory drive system comprising:
a damper-isolator of claim 1 mounted to a crankshaft for rotation therewith.

13 . The front end accessory drive system of claim 12 , wherein the damper-isolator comprises a plurality of first magnets and a plurality of second magnets, wherein the plurality of first magnets are positioned in an alternating fashion relative to the plurality of second magnets within the magnet track.

14 . The front end accessory drive system of claim 12 , wherein the damper-isolator comprises a first pocket in which the first magnet is seated and the pulley body further comprises a second pocket in which the second magnet is seated.

15 . The front end accessory drive system of claim 12 , wherein the first magnet is connected to the hub by a first fastener, and the second magnet is connected to the pulley body by a second fastener.

16 . The front end accessory drive system of claim 12 , wherein the damper-isolator further comprises a slide bearing disposed between mating radially facing surfaces of the hub and the pulley body that are rotatable relative to one another.

17 . The front end accessory drive system of claim 12 , wherein the hub and the pulley body, collectively, define a first clearance gap between the first magnet and the pulley body and a second clearance gap between the second magnet and the hub along the respective line of travel of each within the magnet track.

Assignees

• Manzoor Suhale
• Dayco Ip Holdings Llc

Inventors

• Manzoor Suhale

Classifications

• F16H2055/366

  with means providing resilience or vibration damping · CPC title

• F16F15/18 Primary

  using electric, {magnetic or electromagnetic} means ({suppression of vibrations of rotating systems by use of non-rotating magnetic or electromagnetic means F16F15/03;} dynamo-electric devices H02K; {control effected upon generator excitation circuit to reduce harmful effects of overloads or transients H02P9/10}) · CPC title

• F16F15/12

  using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon ({F16F15/14} , F16F15/16 take precedence) · CPC title

• F16H55/36

  Pulleys (with features essential for adjustment F16H55/52) · CPC title

• F16F6/00 Primary

  Magnetic springs {(magnetic spring arrangements for the suppression of vibration in systems F16F15/03)}; Fluid magnetic springs {, i.e. magnetic spring combined with a fluid} · CPC title