Elastomer series coupling damper for supercharger

Patent metadata

Field	Value
Publication number	US-2016356318-A1
Application number	US-201615239442-A
Country	US
Kind code	A1
Filing date	Aug 17, 2016
Priority date	Feb 18, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

A coupling assembly arranged between an input shaft and a rotor shaft of a supercharger includes a first hub, a second hub, a first side coupling assembly, a second side coupling assembly, a central hub and a plurality of coupler pins. The first hub can be mounted with the input shaft. The second hub can be mounted with the rotor shaft. The first side coupling assembly can have a first side coupling body and a first side elastomeric insert. The second side coupling assembly can have a second side coupling body and a second side elastomeric insert. The central hub can define central hub bores therein. The plurality of coupler pins can be received in the central hub bores. The first and second side elastomeric inserts provide dampening between (i) the first side coupling body and the central hub and (ii) the second side coupling body and the central hub.

First claim

What is claimed is:

1 . A coupling assembly arranged between an input shaft and a rotor shaft of a supercharger, the coupling assembly comprising:
a first hub mounted for concurrent rotation with the input shaft; a second hub mounted for concurrent rotation with the rotor shaft; a first side coupling assembly having a first side coupling body and a first side elastomeric insert, the first side coupling assembly defining a first plurality of openings therein; a second side coupling assembly having a second side coupling body and a second side elastomeric insert, the second side coupling assembly defining a second plurality of openings therein; a central hub disposed intermediate the first and second side coupling assemblies, the central hub defining central hub bores therein; and a plurality of coupler pins received in the central hub bores and extending on one end into the first plurality of openings and on a second end into the second plurality of openings; wherein the first and second side elastomeric inserts provide dampening between (i) the first side coupling body and the central hub and (ii) the second side coupling body and the central hub.

2 . The coupling assembly of claim 1 , further comprising:
a first hub that is configured to couple between the input shaft and the first side coupling assembly, the first hub having a first plurality of hub pins extending therefrom; a second hub that is configured to couple between the rotor shaft and the second side coupling assembly, the second hub having a second plurality of hub pins extending therefrom.

3 . The coupling assembly of claim 2 wherein the central hub further defines arcuate passages formed therein configured to at least partially receive the first hub pins and the second hub pins.

4 . The coupling assembly of claim 3 wherein the first side coupling body defines a plurality of openings having an oval shape and the first side elastomeric insert defines a plurality of openings having a circular shape.

5 . The coupling assembly of claim 4 wherein the second side coupling body defines a plurality of openings having an oval shape and the second side elastomeric insert defines a plurality of openings having a circular shape.

6 . The coupling assembly of claim 5 wherein the plurality of coupler pins and the first plurality of hub pins are permitted to travel within the boundary of the oval openings in the first side coupling body while the first side elastomeric insert absorbs torsional loads.

7 . The coupling assembly of claim 6 wherein the plurality of coupler pins and the second plurality of hub pins are permitted to travel within the boundary of the oval openings in the second side coupling body while the second side elastomeric insert absorbs torsional loads.

8 . The coupling assembly of claim 7 wherein the first and second side elastomeric inserts are formed of molded rubber.

9 . The coupling assembly of claim 7 wherein the first side coupling body and the second side coupling body both include (i) an outboard body portion having a cylindrical outer surface and (ii) an inboard body portion having a plurality of radially extending lobes.

10 . The coupling assembly of claim 9 wherein the first side coupling body and the second side coupling body both include diametrically opposed inner and outer cylindrical walls in the outboard body portion that define a pocket, wherein the first and second side elastomeric inserts are received by the respective pockets.

11 . The coupling assembly of claim 1 wherein the first and second side coupling bodies are formed of glass-filled molded nylon.

12 . The coupling assembly of claim 2 wherein:
the first side elastomeric insert provides parallel damping for the first side coupling assembly as it absorbs rotational energy from the coupler pins;
the second side elastomeric insert provides parallel damping for the second side coupling assembly as it absorbs rotational energy from the coupler pins; and
the first side coupling assembly and the second side coupling assembly cooperate to provide series dampening along the coupler pins along opposite sides of the central hub.

13 . A coupling assembly arranged between an input shaft and a rotor shaft of a supercharger, the coupling assembly comprising:
a first hub having a first plurality of openings therein, the first hub mounted for concurrent rotation with the input shaft; a first plurality of coupling pins extending from the first plurality of openings; a second hub having a second plurality of openings therein, the second hub mounted for concurrent rotation with the rotor shaft; a second plurality of coupling pins extending from the second plurality of openings; and a central hub disposed intermediate the first and second hubs, the central hub having an elastomeric body that defines a series of passages therethrough, wherein the first plurality of pins and the second plurality of pins are alternately received by the series of passages of the elastomeric body.

14 . The coupling assembly of claim 13 wherein the passages provide incremental dampening against the first and second plurality of pins.

15 . The coupling assembly of claim 14 wherein the series of passages each define a first end having a circular cross-section and an opposite end defining an oblong cross-section.

16 . The coupling assembly of claim 14 wherein the series of passages each define a first end having an oblong cross-section and an opposite end defining an oblong cross-section, wherein the passages taper inwardly toward a central waist having a circular cross-section.

17 . The coupling assembly of claim 16 wherein the oblong cross-sections have a length of substantially 9.6 mm and a radius of substantially 3.5 mm.

18 . The coupling assembly of claim 13 wherein the central hub further comprises an inner band and an outer band.

19 . The coupling assembly of claim 13 wherein the first and second plurality of coupling pins provide substantially 10 degrees of travel in a first rotational direction relative to the central hub and substantially 10 degrees of travel in a second rotational direction relative to the central hub, the first and second rotational directions being opposite.

20 . The coupling assembly of claim 13 wherein:
the first plurality of coupling pins are alternately received by the first plurality of openings such that every other opening of the first plurality of openings receives a respective coupling pin of the first plurality of coupling pins;
the second plurality of coupling pins are alternately received by the second plurality of openings such that every other opening of the second plurality of openings receives a respective coupling pin of the second plurality of coupling pins;
a coupling pin of the first plurality of coupling pins is axially aligned with an unoccupied opening of the second plurality of openings; and
a coupling pin of the second plurality of coupling pins is axially aligned with an unoccupied opening of the first plurality of openings.

Assignees

• Eaton Corp

Inventors

• Pratley Mark Harold
• Witherspoon William Bruce
• Coates Michael

Classifications

• F16D3/70 Primary

  comprising elastic elements arranged in holes in one coupling part and surrounding pins on the other coupling part · CPC title

• F04C23/006

  having complementary function · CPC title

• F02B39/16

  Other safety measures for, or other control of, pumps · CPC title

• F16D47/02

  of which at least one is a coupling · CPC title

• F04C18/126

  with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type · CPC title