JPH0287986U

JPH0287986U -

Info

Publication number: JPH0287986U
Application number: JP16771188U
Authority: JP
Priority date: 1988-12-27
Filing date: 1988-12-27
Publication date: 1990-07-12

Description

[Brief explanation of drawings]

図面は本考案の実施例を示すものであつて、そ
の第１図はポンプカバーを外した本考案の正面図
、第２図は本考案の縦断側面図、第３図はポンプ
ボデイーの一部切除した斜視図、第４図は第３図
−矢視断面図、第５図は第３図−矢視断
面図、第６図、第７図はポンプボデイーの別の実
施例の正面図、第８図は本考案の別の実施例の縦
断側面図、第９図はポンプカバーの斜視図、第１
０図は本考案において、流体の作用を示す縦断側
面図、第１１図は空〓部箇所の拡大正面図、第１
２図は流体の作用状態を示す空〓部箇所の拡大縦
断側面図、第１３図乃至第１６図は本考案の別の
実施例の要部断面図である。１……ポンプボデイー、１ｂ，２ａ……軸孔、
２……ポンプカバー、３……ロータ室、４……ア
ウターロータ、５……インナーロータ、５ａ……
駆動軸、６……吸入ポート、７……吐出ポート、
８……ポート間仕切部、９……漏流体帰還溝、１
０……漏流体帰還路、１１，１３……オイルシー
ル、ｓ……空〓部。 The drawings show an embodiment of the present invention, in which Figure 1 is a front view of the invention with the pump cover removed, Figure 2 is a vertical side view of the invention, and Figure 3 is a part of the pump body. FIG. 4 is a cross-sectional view taken from FIG. 3 in the direction of the arrows, FIG. 5 is a cross-sectional view taken in the direction of FIG. FIG. 8 is a longitudinal sectional side view of another embodiment of the present invention, FIG. 9 is a perspective view of the pump cover, and FIG.
Figure 0 is a vertical cross-sectional side view showing the action of fluid in the present invention, Figure 11 is an enlarged front view of the hollow part, and Figure 1 is a vertical side view showing the action of the fluid.
FIG. 2 is an enlarged longitudinal sectional side view of the hollow portion showing the state of fluid action, and FIGS. 13 to 16 are sectional views of main parts of other embodiments of the present invention. 1... Pump body, 1b, 2a... Shaft hole,
2... Pump cover, 3... Rotor chamber, 4... Outer rotor, 5... Inner rotor, 5a...
Drive shaft, 6...Suction port, 7...Discharge port,
8...Port partition, 9...Fluid leakage return groove, 1
0...Leakage fluid return path, 11, 13...Oil seal, s...Empty part.

Claims

[Claims for Utility Model Registration] (1) Around the shaft hole end of the drive shaft of the inner rotor,
In addition, a leakage fluid return groove is formed as a fluid receiving part on the inner surface of the rotor chamber, and the air space formed by the port partition between the suction port and the discharge port and the outer rotor and the inner rotor has approximately the maximum volume. In the place,
A trochoid type oil pump characterized in that a fluid sending end of the fluid leakage return groove is arranged. (2) Around the shaft hole end of the drive shaft of the inner rotor,
In addition, a fluid receiving portion of a leakage fluid return groove is formed on the inner surface of the pump cover, and the air space formed by the port partition between the suction port and the discharge port and the outer rotor and the inner rotor has approximately the maximum volume. A trochoid type oil pump characterized in that a fluid sending end of the fluid leakage return groove is disposed on the inner surface of the pump cover at a position corresponding to the location. (3) At the shaft hole wall of the pump body between the inner rotor and the oil seal location where the drive shaft of the inner rotor is closely provided in the pump body, and at the port partition between the suction port and the discharge port, and at the outer The sky formed by the rotor and inner rotor
A trochoid-type oil pump characterized in that a leakage fluid return path is formed between the port partition surface and the port partition surface at a point where the section has a substantially maximum volume. (4) At the shaft hole wall of the pump cover between the inner rotor and the oil seal area where the drive shaft of the inner rotor is tightly installed on the pump cover, and at the port partition between the suction port and the discharge port, and at the outer A trochoid type oil pump characterized in that a leakage fluid return path is formed between the rotor and the inner surface of the pump cover at a position corresponding to the location where the cavity formed by the inner rotor has approximately the maximum volume.