Flap device for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-9518514-B2
Application number	US-201314649215-A
Country	US
Kind code	B2
Filing date	Nov 12, 2013
Priority date	Dec 5, 2012
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A flap device for an internal combustion engine includes a flow housing comprising a flow channel, a bore arranged in the flow housing, an actuating shaft which protrudes outwards through the bore, a flap body arranged on the actuating shaft, a first bearing bush, and a sealing element radially surrounding the actuating shaft. The first bearing bush is arranged in the bore and has the actuating shaft mounted therein. An axial end of the first bearing bush protrudes beyond an end of the bore. The sealing element comprises at least one plate spring arranged between a first disc and a second disc. The first disc is secured on the actuating shaft and supports the at least one plate spring. The at least one plate spring rests against the second disc so that the second disc rests against the axial end of the first bearing bush which protrudes beyond the bore.

First claim

What is claimed is:

1. A flap device for an internal combustion engine, the flap device comprising:
a flow housing comprising a flow channel;
a bore comprising an end, the bore being arranged in the flow housing;
an actuating shaft arranged to protrude outwards through the bore;
a flap body arranged on the actuating shaft in the flow channel;
a first bearing bush comprising an axial end, the first bearing bush being arranged in the bore and configured to have the actuating shaft be mounted therein, the axial end of the first bearing bush being arranged to protrude beyond the end of the bore; and
a sealing element arranged to radially surround the actuating shaft, the sealing element comprising,
at least one spring element provided as at least one plate spring,
a first disc, and
a second disc,
wherein,
the at least one plate spring is arranged between the first disc and the second disc,
the first disc is rigidly secured on the actuating shaft and supports the at least one plate spring,
the at least one plate spring is arranged so as to rest against the second disc in a pre-tensioned manner so that the second disc rests, in a spring-loaded manner, against the axial end of the first bearing bush which protrudes beyond the bore, and
the first disc and the second disc are rotatorily connected to each other to prevent a relative movement between the first disk or the second disk and plate spring.

2. The flap device as recited in claim 1 , wherein the sealing element comprises at least three plate springs which are respectively arranged opposite to each other.

3. The flap device as recited in claim 2 , further comprising at least one adjusting disc, a respective at least one adjusting disc being arranged between respective plate springs.

4. The flap device as recited in claim 1 , further comprising a material connection configured to fasten the first disc on the actuating shaft, wherein the first disc acts as a lever to actuate of the actuating shaft.

5. The flap device as recited in claim 1 , wherein,
the first disc comprises an axially extending arm, and
the second disc comprises a recess configured to have the axially extending arm of the first disc engage therewith so as to provide the rotatory connection.

6. The flap device as recited in claim 1 , further comprising:
a second bearing bush arranged in the bore and configured to have the actuating shaft be mounted therein; and
a bush or thrust washer arranged between the flap body and the first bearing bush or the second bearing bush,
wherein,
the flap body, or the bush or thrust washer, is spring-loaded against the bearing bush by a force of the at least one plate spring.

7. The flap device as recited in claim 6 , wherein,
the second bearing bush comprises an axial end which extends into the flow channel, and
the flap body is spring-loaded against the second bearing bush or against the bush or thrust washer adjoining the second bearing bush via the force of the at least one plate spring.

8. The flap device as recited in claim 6 , further comprising:
a third bearing bush comprising an axial end, the third bearing bush being configured to support the actuating shaft,
wherein,
the flow housing comprises a blind hole on a side of the flow housing opposite the bore, the third bearing bush being arranged in the blind hole, and
the axial end of the third bearing bush protrudes into the flow channel.

9. The flap device as recited in claim 8 , wherein,
the first bearing bush and the second bearing bush are each fastened in a press-fit in the bore, and
the third bearing bush is fastened in a press-fit in the blind hole.

10. A flap device for an internal combustion engine, the flap device comprising:
a flow housing comprising a flow channel;
a bore comprising an end, the bore being arranged in the flow housing;
an actuating shaft arranged to protrude outwards through the bore;
a flap body arranged on the actuating shaft in the flow channel;
a first bearing bush comprising an axial end, the first bearing bush being arranged in the bore and configured to have the actuating shaft be mounted therein, the axial end of the first bearing bush being arranged to protrude beyond the end of the bore;
a second bearing bush arranged in the bore and configured to have the actuating shaft be mounted therein;
a third bearing bush comprising an axial end, the third bearing bush being configured to support the actuating shaft;
a bush or thrust washer arranged between the flap body and the first bearing bush or the second bearing bush; and
a sealing element arranged to radially surround the actuating shaft, the sealing element comprising,
at least one spring element provided as at least one plate spring,
a first disc, and
a second disc;
wherein,
the at least one plate spring is arranged between the first disc and the second disc,
the first disc is rigidly secured on the actuating shaft and supports the at least one plate spring, and
the at least one plate spring is arranged so as to rest against the second disc in a pre-tensioned manner so that the second disc rests, in a spring-loaded manner, against the axial end of the first bearing bush which protrudes beyond the bore, and

wherein,
the flap body, or the bush or thrust washer, is spring-loaded against the second bearing bush by a force of the at least one plate spring,
the flow housing comprises a blind hole on a side of the flow housing opposite the bore, the third bearing bush being arranged in the blind hole, and
the axial end of the third bearing bush protrudes into the flow channel.

11. The flap device as recited in claim 10 , wherein the sealing element comprises at least three plate springs which are respectively arranged opposite to each other.

12. The flap device as recited in claim 11 , further comprising at least one adjusting disc, a respective at least one adjusting disc being arranged between respective plate springs.

13. The flap device as recited in claim 10 , further comprising a material connection configured to fasten the first disc on the actuating shaft, wherein the first disc acts as a lever to actuate of the actuating shaft.

14. The flap device as recited in claim 10 , wherein the first disc and the second disc are rotatorily coupled to each other.

15. The flap device as recited in claim 14 , wherein,
the first disc comprises an axially extending arm, and
the second disc comprises a recess configured to have the axially extending arm of the first disc engage therewith so as to provide the rotatorily coupling.

16. The flap device as recited in claim 10 , wherein,
the second bearing bush comprises an axial end which extends into the flow channel, and
the flap body is spring-loaded against the second bearing bush or against the bush or thrust washer adjoining the second bearing bush via the force of the at least one plate spring.

17. The flap device as recited in claim 10 , wherein,
the first bearing bush and the second bearing bush are each fastened in a press-fit in the bore, and
the third bearing bush is fastened in a press-fit in the blind hole.

Assignees

• Pierburg Gmbh

Inventors

• Evers Markus

Classifications

• F02D9/106 Primary

  Sealing of the valve shaft in the housing, e.g. details of the bearings · CPC title

• F16K1/226

  Shaping or arrangements of the sealing · CPC title

• F02D9/04

  concerning exhaust conduits (throttle valves, or arrangements thereof in conduits F02D9/08) · CPC title

• F16K1/2268

  Sealing means for the axis of rotation · CPC title