Rolling bearing of throttle valve device
AssigneeDenso Corporation
InventorsTetsuya Komeda, Hidetoshi Uchiyama, Masato Arai
Life of this patent
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Abstract
In a throttle valve device for an internal combustion engine, a stepped portion is formed on an outer peripheral surface of an inner ring on a bore side (on an air intake passage side) in order to limit movement of a lip portion of a first lip seal on the bore side toward an inside of a rolling bearing. Thus, even if a high supercharging pressure above an atmospheric pressure acts on the first lip seal, deformation and curling of the lip portion due to the supercharging pressure can be prevented. As a result, separation of a second lip seal on a gear cover side (on an outside) from the rolling bearing can be prevented.
Claims10
A rolling bearing for accommodating a plurality of rolling members between two orbit rings of an inner ring and an outer ring and for rotatably holding a shaft to a bearing accommodating portion of a fixed member or a rotating member, the plurality of rolling members rolling between orbit surfaces of the inner ring and the outer ring, wherein
- the rolling bearing includes two sealing members disposed between the two orbit rings so that the two sealing members are disposed on both sides of the rolling members in an axial direction, and
- the rolling bearing is formed so that rigidity of the sealing member receiving a relatively high pressure from one side in the axial direction is set higher than rigidity of the sealing member receiving a relatively low pressure from the other side in the axial direction.
A rolling bearing for accommodating a plurality of rolling members between two orbit rings of an inner ring and an outer ring and for rotatably holding a shaft to a bearing accommodating portion of a fixed member or a rotating member, the plurality of rolling members rolling between orbit surfaces of the inner ring and the outer ring, the rolling bearing comprising:
- two sealing members disposed between the two orbit rings so that the two sealing members are disposed on both sides of the rolling members in an axial direction;
- and
- a stopper portion formed on at least one of the two orbit rings for limiting movement of at least the sealing member receiving a relatively high pressure out of the two sealing members toward the rolling members.
A throttle valve device for an internal combustion engine including:
- a throttle body for providing an air intake passage therein for sending intake air into the internal combustion engine;
- a throttle valve, which is held in the air intake passage so that the throttle valve can open or close for regulating a quantity of the intake air sent into the internal combustion engine;
- a throttle shaft, which holds the throttle valve and is held to a bearing accommodating portion of the throttle body;
- and
- a rolling bearing for accommodating a plurality of rolling members between two orbit rings of an inner ring and an outer ring and for rotatably holding the throttle shaft to the bearing accommodating portion of the throttle body, the plurality of rolling members rolling between orbit surfaces of the inner ring and the outer ring, wherein
- the rolling bearing includes two sealing members disposed between the two orbit rings so that the two sealing members are disposed on both sides of the rolling members in an axial direction, and
- the rolling bearing is formed so that rigidity of the sealing member receiving a relatively high pressure from one side in the axial direction is set higher than rigidity of the sealing member receiving a relatively low pressure from the other side in the axial direction.
A throttle valve device for an internal combustion engine including:
- a throttle body for providing an air intake passage therein for sending intake air into the internal combustion engine;
- a throttle valve, which is held in the air intake passage so that the throttle valve can open or close for regulating a quantity of the intake air sent into the internal combustion engine;
- a throttle shaft, which holds the throttle valve and is held to a bearing accommodating portion of the throttle body;
- and
- a rolling bearing for accommodating a plurality of rolling members between two orbit rings of an inner ring and an outer ring and for rotatably holding the throttle shaft to the bearing accommodating portion of the throttle body, the plurality of rolling members rolling between orbit surfaces of the inner ring and the outer ring, wherein
- the rolling bearing includes two sealing members disposed between the two orbit rings so that the two sealing members are disposed on both sides of the rolling members in an axial direction, and
- the rolling bearing includes a stopper portion formed on at least one of the two orbit rings for limiting movement of at least the sealing member receiving a relatively high pressure out of the two sealing members toward the rolling members.
Dependencies are inferred from the claim text.