VARIABLE DISPLACEMENT SWASH PLATE TYPE PISTON PUMP AND METHOD FOR MANUFACTURING VARIABLE DISPLACEMENT SWASH PLATE TYPE PISTON PUMP

PROBLEM TO BE SOLVED: To suppress peeling of a slide surface of a bushing.SOLUTION: The whole circumference of the inner surface 40a of a groove 40 is in a tapered shape that is inclined toward a virtual straight line L2 according as separating from a slide surface 25a. Therefore, the pressure of hy...

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Bibliographic Details
Main Authors MATSUO TSUTOMU, UEDA SUKENORI, UNO MINESHI, YOKOMACHI NAOYA, MARUYAMA DAISUKE
Format Patent
LanguageEnglish
Japanese
Published 25.10.2018
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Summary:PROBLEM TO BE SOLVED: To suppress peeling of a slide surface of a bushing.SOLUTION: The whole circumference of the inner surface 40a of a groove 40 is in a tapered shape that is inclined toward a virtual straight line L2 according as separating from a slide surface 25a. Therefore, the pressure of hydraulic oil supplied in the groove 40 acts on the inner surface 40a of the groove 40 in a direction separating from the slide surface 25a, namely toward a base part 45 side with respect to the inner surface 40a of the groove 40. Then, the pressure of hydraulic oil supplied in the groove 40 acts to adhere a resin part 46 to a base part 45 so that peeling of the resin part 46 with respect to the base part 45 is suppressed. Accordingly, peeling of the slide surface 25a of a bushing 25 is suppressed.SELECTED DRAWING: Figure 5 【課題】ブッシュの被摺動面の剥がれを抑制すること。【解決手段】溝40の内面40a全周は、被摺動面25aから離れるにつれて仮想直線L2に向けて傾斜するテーパ形状である。このため、溝40内に供給された作動油の圧力が、溝40の内面40aに対して被摺動面25aから離れる方向、すなわち、溝40の内面40aに対してベース部45側に向けて作用する。すると、溝40内に供給された作動油の圧力が、樹脂部46をベース部45に接着させる作用をし、ベース部45に対する樹脂部46の剥がれが抑制される。したがって、ブッシュ25の被摺動面25aの剥がれが抑制される。【選択図】図5
Bibliography:Application Number: JP20170062523