JPH01130091U

JPH01130091U -

Info

Publication number: JPH01130091U
Application number: JP2658588U
Authority: JP
Priority date: 1988-02-29
Filing date: 1988-02-29
Publication date: 1989-09-05
Anticipated expiration: 2003-02-28
Also published as: JPH073033Y2

Description

[Brief explanation of the drawing]

第１図ないし第３図は本考案の一実施例を示す
もので、第１図は内接歯車ポンプの縦断面図、第
２図は第１図の線―に沿つた断面図、第３図
は一実施例のポンプ特性図、第４図は本考案の他
の実施例を示した内接歯車ポンプの部分図、第５
図は本考案の他の実施例のポンプ特性図である。１…本体、５…ポンプ本体、１０…内歯歯車、
１１…外歯歯車、１７…吸入流路、１８…吐出流
路、２３…圧力制御手段、３１…回転駆動力伝達
手段。 Figures 1 to 3 show one embodiment of the present invention, in which Figure 1 is a longitudinal sectional view of an internal gear pump, Figure 2 is a sectional view taken along the line - in Figure 1, and Figure 3 is a sectional view taken along the line - in Figure 1. The figure is a pump characteristic diagram of one embodiment, Figure 4 is a partial diagram of an internal gear pump showing another embodiment of the present invention, and Figure 5 is a partial diagram of an internal gear pump showing another embodiment of the present invention.
The figure is a diagram showing pump characteristics of another embodiment of the present invention. 1... Main body, 5... Pump main body, 10... Internal gear,
DESCRIPTION OF SYMBOLS 11... External gear, 17... Suction channel, 18... Discharge channel, 23... Pressure control means, 31... Rotational driving force transmission means.

Claims

[Scope of utility model registration request]

An internal gear having internal teeth and an external gear having external teeth are rotatably housed in the pump body so that the internal teeth mesh eccentrically, and the internal gear is driven to rotate by the rotational drive of the external gear. A suction passage and a discharge passage for the liquid are provided in the pump body so as to communicate with the expansion region space and the pumping region space, which are formed facing each other between the internal gear and the external gear, respectively, so as to suck and discharge the liquid. The pump is rotatably housed in the pump, and the discharge pressure in the discharge flow path and the set pressure based on the spring force act oppositely to prevent the rotation of the pump body when the discharge pressure in the discharge flow path is less than the set pressure. The main body is equipped with a pressure control means that presses the main body and releases the pressure on the pump main body to allow rotation of the pump main body when the discharge pressure of the discharge passage increases to the set pressure, and the pressure control means is provided in the main body to release the pressure on the pump main body so as to allow rotation of the pump main body when the discharge pressure of the discharge passage increases to the set pressure. When the pressure control means is pressing the pump body, the rotational driving force of the external gear is not transmitted to the pump body, and when the pressure control means is releasing the pressure on the pump body, the pump body is An internal gear pump comprising a rotational driving force transmitting means for transmitting the rotational driving force of an external gear to a pump body so as to rotate in synchronization with the gear.