JPH0183194U

JPH0183194U -

Info

Publication number: JPH0183194U
Application number: JP1987178442U
Authority: JP
Priority date: 1987-11-24
Filing date: 1987-11-24
Publication date: 1989-06-02

Description

[Brief explanation of the drawing]

第１図はオイルポンプ配置個所の一例を示した
エンジン下部の要部破断側面図、第２図は本考案
の第１実施例に係るオイルポンプを展開して示す
縦断面図、第３図はカバーを外したポンプボデイ
の正面図、第４図はタイミングローターの単品正
面図、第５図と第６図は第２図の矢印―線及
び―線に沿つた各断面図、第７図は本考案の
第２実施例に係るオイルポンプの展開縦断面図、
第８図と第９図は二枚のアウターローターの位相
変化を示す各模式図、第１０図は第７図の矢印
―線に沿つた断面図、第１１図は三角ローター
を使用したオイルポンプを示す横断面図、第１２
図は三角ローター部分の破断正面図、第１３図は
分解斜視図である。尚、図面中、１０，３０はオイルポンプ、１１
，３１はポンプボデイ、１２，３２は吸入ポート
、１３，３３は吐出ポート、１４は凹部、１５，
３５，４５はアウターローター、１７，３７はシ
ヤフト、１９，３９はインナーローター、２１，
４１はオイル吐出量可変部材としてのタイミング
ローターとハウジングである。 Fig. 1 is a cutaway side view of the essential parts of the lower part of the engine showing an example of the location where the oil pump is arranged, Fig. 2 is a vertical cross-sectional view showing an expanded view of the oil pump according to the first embodiment of the present invention, and Fig. 3 is Figure 4 is a front view of the pump body with the cover removed, Figure 4 is a front view of the timing rotor separately, Figures 5 and 6 are cross-sectional views taken along the arrows - and - lines in Figure 2, and Figure 7 is a front view of the timing rotor. A developed longitudinal sectional view of an oil pump according to a second embodiment of the invention,
Figures 8 and 9 are schematic diagrams showing the phase changes of the two outer rotors, Figure 10 is a sectional view taken along the arrow line in Figure 7, and Figure 11 is an oil pump using a triangular rotor. 12th cross-sectional view showing
The figure is a cutaway front view of the triangular rotor portion, and FIG. 13 is an exploded perspective view. In addition, in the drawing, 10 and 30 are oil pumps, 11
, 31 is a pump body, 12, 32 are suction ports, 13, 33 are discharge ports, 14 is a recess, 15,
35, 45 are outer rotors, 17, 37 are shafts, 19, 39 are inner rotors, 21,
Reference numeral 41 denotes a timing rotor and a housing as oil discharge amount variable members.

Claims

[Scope of Claim for Utility Model Registration] (1) An outer rotor rotatably built into the pump body and an inner rotor fixed to a shaft driven by engine power are eccentrically engaged, and the inner rotor and the outer In an oil pump that rotates with the rotor, oil is sucked into the outer rotor from a suction port opened in the pump body and then discharged to the discharge port. An engine oil pump characterized by having a variable member. (2) Utility model registration Claim 1, wherein a recess that is continuous with the opening surface of the discharge port is formed in the pump body in a direction opposite to the rotational direction of the outer rotor, and the oil discharge amount variable member is a timing rotor that is housed in this recess and changes the opening timing of the discharge port, and as the oil discharge pressure increases, this timing rotor moves within the recess in the opposite direction to the rotational direction of the outer rotor and discharges the oil. An oil pump for an engine, characterized by accelerating the opening timing of a port and causing oil to flow back into the suction port. (3) In claim 1 of the utility model registration claim, the outer rotor is composed of two layers stacked in the axial direction, and the oil discharge amount variable member holds one of the outer rotors eccentrically with respect to the pump body so as to be rotatable. An oil pump for an engine, characterized in that the housing continuously changes the phase between an outer rotor that rotates and is held as the oil discharge pressure increases, and the other outer rotor.