US 10,330,025 B2Granted

Valve device

AssigneeDenso Corporation

InventorsRyo Noumura, Yasushi Kawano, Tohru Shimizu

Life of this patent

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Abstract

A surface of a bearing member on a flow passage forming chamber-side is disposed to be exposed to the chamber. The bearing member includes a contact part, with which a side surface of a butterfly valve that is opposed to the bearing member is in contact, on at least a part of the surface of the bearing member on the chamber-side. The bearing member is a radial ball bearing and includes an outer bearing ring that is fitted to an inner periphery of a shaft hole, so that its axial displacement relative to a body is restricted, an inner bearing ring that is fitted on an outer periphery of a rotation shaft radially inward of the outer bearing ring, and a rolling element disposed between the outer bearing ring and the inner bearing ring. The contact part is provided on a surface of the inner bearing ring on the chamber-side.

Claims10

Dependent claims

A valve device comprising:

a body that includes a flow passage forming chamber, which is configured as a part of a fluid flow passage communicating with a combustion chamber of an internal-combustion engine;
a butterfly valve that is accommodated rotatably in the flow passage forming chamber to adjust a flow rate through the fluid flow passage;
a rotation shaft that rotates integrally with the butterfly valve;
a shaft hole which is formed in the body to open into the flow passage forming chamber and through which the rotation shaft passes;
and
a bearing member that is disposed in the shaft hole to support the rotation shaft, wherein:
a surface of the bearing member on the flow passage forming chamber-side is disposed to be exposed to the flow passage forming chamber;
the bearing member includes a contact part, with which a side surface of the butterfly valve that is opposed to the bearing member is in contact, on at least a part of the surface of the bearing member on the flow passage forming chamber-side;
the bearing member is a radial ball bearing and includes:
an outer bearing ring that is fitted to an inner periphery of the shaft hole, so that its axial displacement relative to the body is restricted;
an inner bearing ring that is fitted on an outer periphery of the rotation shaft radially inward of the outer bearing ring;
and
a rolling element that is disposed between the outer bearing ring and the inner bearing ring;
and
the contact part is provided on a surface of the inner bearing ring on the flow passage forming chamber-side.

12 more elements

A valve device comprising:

a body that includes a flow passage forming chamber, which is configured as a part of a fluid flow passage communicating with a combustion chamber of an internal-combustion engine;
a butterfly valve that is accommodated rotatably in the flow passage forming chamber to adjust a flow rate through the fluid flow passage;
a rotation shaft that rotates integrally with the butterfly valve;
a first shaft hole which is formed in the body to open into the flow passage forming chamber and in which one axial end part of the rotation shaft is accommodated;
a second shaft hole which is formed in the body to open into the flow passage forming chamber and in which the other axial end part of the rotation shaft is accommodated;
a first bearing member that is disposed in the first shaft hole to support the rotation shaft;
and
a second bearing member that is disposed in the second shaft hole to support the rotation shaft, wherein:
a surface of the first bearing member on the flow passage forming chamber-side and a surface of the second bearing member on the flow passage forming chamber-side are both disposed to be exposed to the flow passage forming chamber;
the first bearing member includes a first contact part, with which a side surface of the butterfly valve that is opposed to the first bearing member is in contact, on at least a part of the surface of the first bearing member on the flow passage forming chamber-side;
the second bearing member includes a second contact part, with which a side surface of the butterfly valve that is opposed to the second bearing member is in contact, on at least a part of the surface of the second bearing member on the flow passage forming chamber-side;
each of the first bearing member and the second bearing member is a thrust ball bearing, and includes:
a shaft-side bearing ring that is fixed to the rotation shaft;
a body-side bearing ring that is fixed to the body;
and
a rolling element that is disposed between the shaft-side bearing ring and the body-side bearing ring;
the first contact part is provided at the shaft-side bearing ring in the first bearing member;
and
the second contact part is provided at the body-side bearing ring in the second bearing member.

16 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/524,728Filed 15 Dec 2015
Priority: JP 2014-26325725 Dec 2014
Published: US 2017/0342914 A130 Nov 2017
Granted: 25 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

F02D 9/10
Throttle valves specially adapted therefor; Arrangements of such valves in conduits: having pivotally-mounted flaps
F02D 9/106
Details of the valve housing: sealing of the valve shaft in the housing, e.g. details of the bearings
F02D 11/10
Characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance: of the…
F16C 33/783
Details of the sealing or parts thereof, e.g. geometry, material: of the mounting region