JPH01102471U

JPH01102471U -

Info

Publication number: JPH01102471U
Application number: JP19767087U
Authority: JP
Priority date: 1987-12-26
Filing date: 1987-12-26
Publication date: 1989-07-11

Description

[Brief explanation of the drawing]

第１図から第６図は本考案の第１実施例であり
、第１図は正面図、第２図及び第３図は第１図の
Ａ―Ａ断面図及びＢ―Ｂ断面図、第４図は本体の
正面図、第５図はダイヤフラムの正面図、第６図
は構成説明断面図、第７図から第９図は本考案の
第２実施例であり、第７図は正面図、第８図は第
７図のＣ―Ｃ断面図、第９図は構成説明断面図、
第１０図は本考案の第３実施例の正面図、第１１
図は従来技術の断面図である。１，５１……本体、２……カバー、３……ダイ
ヤフラム、４，５５……吸入側舌状弁、５，５６
……吐出側舌状弁、６，５８……舌状逆止弁、８
，５９……受圧板、１２，６３……スプリング、
１６，６７……燃料室、１７，６８……弁座、１
８，６９……燃料吸入通路、１９，７０……燃料
吸入室、２０，７１……吸入側弁座、２２，７３
……ポンプ室、２３，７４……燃料吐出通路、２
４，７５……燃料吐出室、２５，７６……吐出側
弁座、３１，８２……逆止弁室、３９，４１，８
５，８７……パルス通路、４０，８６……パルス
室、４３，８９……負圧通路、４４，９０……負
圧室、５２……ポンプ側カバー、５３……コツク
側カバー、５４……ポンプ側ダイヤフラム、５７
……コツク側ダイヤフラム。 1 to 6 show a first embodiment of the present invention, in which FIG. 1 is a front view, FIGS. 2 and 3 are sectional views taken along line AA and BB in FIG. Figure 4 is a front view of the main body, Figure 5 is a front view of the diaphragm, Figure 6 is a cross-sectional view to explain the configuration, Figures 7 to 9 are a second embodiment of the present invention, and Figure 7 is a front view. , FIG. 8 is a CC sectional view of FIG. 7, FIG. 9 is a sectional view explaining the configuration,
Figure 10 is a front view of the third embodiment of the present invention;
The figure is a sectional view of the prior art. 1,51...Main body, 2...Cover, 3...Diaphragm, 4,55...Suction side tongue valve, 5,56
...Discharge side tongue valve, 6,58...Tongue check valve, 8
, 59...pressure receiving plate, 12, 63... spring,
16,67...Fuel chamber, 17,68...Valve seat, 1
8, 69... Fuel suction passage, 19, 70... Fuel suction chamber, 20, 71... Suction side valve seat, 22, 73
... Pump chamber, 23, 74 ... Fuel discharge passage, 2
4, 75... Fuel discharge chamber, 25, 76... Discharge side valve seat, 31, 82... Check valve chamber, 39, 41, 8
5, 87... Pulse passage, 40, 86... Pulse chamber, 43, 89... Negative pressure passage, 44, 90... Negative pressure chamber, 52... Pump side cover, 53... Kotoku side cover, 54... ...Pump side diaphragm, 57
...Kotuku side diaphragm.

Claims

[Scope of Claim for Utility Model Registration] A diaphragm fuel pump with a stop that automatically opens and closes the fuel passage in a diaphragm fuel pump operated by the pulsating pressure of the intake manifold of a motorcycle, etc. A suction side tongue valve and a discharge side tongue valve formed integrally with the diaphragm are positioned on the suction side valve seat and the discharge side valve seat formed on the main body, and the main body and the diaphragm form a pump chamber, and the pump chamber A pulse chamber is provided on the opposite side of the diaphragm, a fuel suction passage opened at the suction side valve seat is communicated with the fuel chamber, a valve seat is provided in the fuel chamber, and a pulse chamber is provided on the opposite side of the diaphragm with respect to the fuel chamber. A negative pressure chamber is provided, a spring is placed in the negative pressure chamber to constantly press the valve that opens and closes the valve seat, and the pulse passage leading to the pulse chamber is communicated with the check valve chamber, and the valve is integrated with the diaphragm. The tongue check valve is located in the check valve chamber, and the check valve chamber is communicated with a negative pressure passage connected to a negative pressure chamber via the tongue check valve. Diaphragm fuel pump.