JPH0246084U

JPH0246084U -

Info

Publication number: JPH0246084U
Application number: JP12284788U
Authority: JP
Priority date: 1988-09-21
Filing date: 1988-09-21
Publication date: 1990-03-29
Anticipated expiration: 2003-09-21
Also published as: JPH0744780Y2

Description

[Brief explanation of drawings]

図面は本考案の実施例を示すものであり、その
第１図は第２図の―矢視箇所に相当する本考
案の断面図、第２図はポンプカバーを外した本考
案の側面図、第３図はアウターロータの一部切除
した斜視図、第４図はインナーロータの斜視図、
第５図はポンプボデーの斜視図、第６図乃至第９
図は本考案の別の実施例の断面図、第１０図はポ
ンプカバーの斜視図、第１１図は第１０図のポン
プカバーを使用した本考案の別の実施例の断面図
である。Ａ……ケーシング、１……ポンプボデー、２…
…ポンプカバー、２ａ……カバー逃し部、３……
ロータ室、４……アウターロータ、４ａ……アウ
ター逃し部、Ｄ_４ｂ，Ｄ_５ｂ……歯底円、Ｄ_４ｃ，Ｄ_５ｃ……歯先円、５……インナーロータ、５
ａ……インナー逃し部、６……吸入ポート、７…
…吐出ポート、８……ポート間仕切り部、Ｐ……
バランスポート。 The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of the present invention corresponding to the position shown by the - arrow in FIG. 2, and FIG. 2 is a side view of the present invention with the pump cover removed. Figure 3 is a partially cutaway perspective view of the outer rotor, Figure 4 is a perspective view of the inner rotor,
Figure 5 is a perspective view of the pump body, Figures 6 to 9
10 is a perspective view of a pump cover, and FIG. 11 is a sectional view of another embodiment of the present invention using the pump cover of FIG. 10. A...Casing, 1...Pump body, 2...
...Pump cover, 2a...Cover relief part, 3...
Rotor chamber, 4...Outer rotor, 4a...Outer relief part, _D4b , _D5b ...Tooth bottom circle, _D4c ,D _5c ...Tip circle, 5...Inner rotor, 5
a...Inner relief part, 6...Suction port, 7...
...Discharge port, 8...Port partition, P...
balance port.

Claims

[Scope of claim for utility model registration] (1) In the outer rotor and inner rotor installed in the rotor chamber of the casing, an outer relief portion is formed on one side from the vicinity of the bottom circle of the outer rotor to the tooth tip circle, and the inner rotor A trochoid type characterized in that an inner relief part is formed on one side from near the root circle to the tip circle, and the outer relief part and the inner relief part are located on the port partition side of the casing. oil pump. (2) For the outer rotor and inner rotor installed in the rotor chamber of the casing, outer relief parts are formed on both sides from the vicinity of the root circle of the outer rotor to the tooth tip circle, and A trochoid type oil pump characterized by an inner relief part formed on both sides of the circle. (3) In the outer rotor and inner rotor installed in the rotor chamber of the casing, there is a port partition part of the pump body corresponding to the outer diameter surface position from the vicinity of the root circle of the outer rotor to the vicinity of the root circle of the inner rotor. A trochoid type oil pump characterized by a body relief part formed on a circular surface. (4) In the outer rotor and inner rotor installed in the rotor chamber of the casing, there is a port partition part of the pump body corresponding to the outer diameter surface position from the vicinity of the root circle of the outer rotor to the vicinity of the root circle of the inner rotor. A trochoid type oil pump characterized in that a body relief part is formed on a circular surface of the body, and a cover relief part is formed on an inner surface of a pump cover corresponding to the position of the outer diameter surface of the body relief part. (5) For the outer rotor and inner rotor installed in the rotor chamber of the casing, balance ports are formed on the inner surface of the pump cover corresponding to the suction port and discharge port, respectively, and the tooth tip circle is formed from near the bottom circle of the outer rotor. An outer relief part is formed on one side of the inner rotor from the vicinity of the bottom circle to the tip circle of the inner rotor, and the outer relief part and the inner relief part are located on the pump cover side. This is a trochoid type oil pump that is characterized by being installed as follows. (6) For the outer rotor and inner rotor installed in the rotor chamber of the casing, balance ports are formed on the inner surface of the pump cover corresponding to the suction port and discharge port, respectively, and the inner rotor is A trochoid type oil pump characterized by a cover relief part formed on the inner surface of the pump cover corresponding to the outer diameter surface position up to the vicinity of the tooth root circle.