JPH02105586U

JPH02105586U -

Info

Publication number: JPH02105586U
Application number: JP1481689U
Authority: JP
Priority date: 1989-02-09
Filing date: 1989-02-09
Publication date: 1990-08-22

Description

[Brief explanation of drawings]

第１図はこの考案の第１実施例を示すバキユー
ムポンプの縦断面図、第２図は第１図のＡ―Ａ線
断面図、第３図は同じくＢ―Ｂ線断面図、第４図
は作動ピストンの斜視図、第５図はこの考案の第
２実施例を示す第３図相当図、第６図は第５図の
Ｃ―Ｃ線断面図（但し作動ピストン部を除く）、
第７図は第６図のＤ―Ｄ線断面図である。１……ポンプハウジング、４……連通室、６…
…シリンダヘツド、９……カムシヤフト収容室、
１０……カムシヤフト、１６……シリンダ部、１
７……ガイド穴、２０……作動ピストン、２１…
…ピストン部、２２……ロツド部、２５……切欠
、２６……コンロツド、２９……クランク軸、３
１……ポンプ室、３３……吸入用チエツクバルブ
、３７……吐出用チエツクバルブ、４１……可変
容積室、４２……吸気路、４３……第２の吸入用
チエツクバルブ、５０……バキユームポンプ、５
５……切欠。 Fig. 1 is a longitudinal sectional view of a vacuum pump showing the first embodiment of this invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a sectional view taken along line B-B, and Fig. 4 Figure 5 is a perspective view of the working piston, Figure 5 is a view equivalent to Figure 3 showing the second embodiment of this invention, Figure 6 is a sectional view taken along the line CC in Figure 5 (excluding the working piston part),
FIG. 7 is a sectional view taken along the line DD in FIG. 6. 1...Pump housing, 4...Communication chamber, 6...
...Cylinder head, 9...Camshaft housing chamber,
10...Camshaft, 16...Cylinder part, 1
7... Guide hole, 20... Working piston, 21...
... Piston part, 22 ... Rod part, 25 ... Notch, 26 ... Connecting rod, 29 ... Crankshaft, 3
DESCRIPTION OF SYMBOLS 1... Pump chamber, 33... Check valve for suction, 37... Check valve for discharge, 41... Variable volume chamber, 42... Intake path, 43... Second check valve for suction, 50... Baki Youmu pump, 5
5... Notch.

Claims

[Scope of utility model registration request]

The cylinder part installed inside the pump housing is attached to the side end of the cylinder head of the engine.
Insert the piston part of the operating piston so that it can slide freely,
A pump chamber equipped with a suction check valve and a discharge check valve is formed on one side of the piston part, and a guide hole coaxial with the cylinder part and having a smaller diameter than the cylinder part is formed inside the pump housing. A guide hole and a communication chamber communicating with the camshaft housing chamber in the cylinder head are provided, and a rod portion of the actuating piston connected to the piston portion is slidably inserted into the guide hole to connect the cylinder portion and the camshaft housing chamber. A variable volume chamber is formed between the rod parts, and the rod part is connected via a connecting rod to a crankshaft protruding from the end of the camshaft of the engine extending into the communication chamber, and the outer circumferential surface of the rod part and at least one of the inner peripheral surfaces of the guide hole is provided with a notch that communicates the variable volume chamber and the communication chamber, and a second intake check is provided in the intake path that connects the variable volume chamber and the communication chamber. A piston sliding type vacuum pump characterized by the provision of a valve.