JPH0440181U

JPH0440181U -

Info

Publication number: JPH0440181U
Application number: JP8192290U
Authority: JP
Priority date: 1990-08-01
Filing date: 1990-08-01
Publication date: 1992-04-06

Description

[Brief explanation of the drawing]

第１図は従来のトロコイドポンプのスラスト止
め装置の縦断面図、第２図は本考案になるトロコ
イドポンプのスラスト止め装置の一実施例を示す
縦断面図、第３図は本考案になるトロコイドポン
プのスラスト止め装置に使用されるインナーロー
タの上部平面図、第４図は第３図の下部平面図、
第５図は第３図−線での縦断面図、第６図は
第３図−線での縦断面図である。１Ｂ……ローター収納室、１Ｄ……ローター収
納室１Ｂの底部、３……ポンプカバー、９……ア
ウターロータ、２０……インナーロータ、２０Ａ
……一側面、２０Ｂ……他側面、２０Ｃ……第１
ガイド孔、２０Ｄ……第２ガイド孔、２０Ｅ……
駆動軸挿入孔、２０Ｆ……ノツクピン係止溝、２
１……第１制限部材、２２……第２制限部材。 Fig. 1 is a vertical sectional view of a conventional trochoid pump thrust stop device, Fig. 2 is a longitudinal sectional view showing an embodiment of the trochoid pump thrust stop device according to the present invention, and Fig. 3 is a longitudinal sectional view of a trochoid pump thrust stop device according to the present invention. FIG. 4 is a top plan view of the inner rotor used in the pump thrust stop device; FIG. 4 is a bottom plan view of FIG. 3;
FIG. 5 is a longitudinal sectional view taken along the line of FIG. 3, and FIG. 6 is a longitudinal sectional view taken along the line of FIG. 3. 1B...Rotor storage chamber, 1D...Bottom of rotor storage chamber 1B, 3...Pump cover, 9...Outer rotor, 20...Inner rotor, 20A
...One side, 20B...Other side, 20C...First
Guide hole, 20D...Second guide hole, 20E...
Drive shaft insertion hole, 20F... Knock pin locking groove, 2
1...First restriction member, 22...Second restriction member.

Claims

[Claims for Utility Model Registration] At least an inner rotor that is fitted into a drive shaft rotatably supported by the pump case, rotates integrally with the drive shaft, and is provided with external teeth; an outer rotor having internal teeth disposed and meshing with external teeth of the inner rotor; an inner rotor and an outer rotor disposed within a rotor storage chamber formed by a pump case and a pump cover covering the pump case; In the trochoid pump, a suction space connected to a suction path and a discharge space connected to a discharge path are formed by the external teeth of the outer rotor and the internal teeth of the outer rotor. From one side 20A of the pump cover 3 side toward the other side 20B of the inner rotor 20 facing the bottom 1D of the rotor storage chamber 1B, from the outer diameter of the knock pin 8 attached to the drive shaft 4 and protruding from the drive shaft 4. A first guide hole 20C having a large diameter is formed, and the other side surface 2 of the inner rotor 20 is
A second guide hole 20D having a diameter larger than the outer diameter of the dowel pin 8 protruding from the drive shaft 4 is bored from 0B toward one side 20A of the inner rotor 20, and the first guide hole 20C and the second guide hole 20D The inner rotor 20 in the rotor storage chamber 1B is connected to the drive shaft insertion hole 20E through the drive shaft insertion hole 20E into which the drive shaft 4 is inserted, and a knock pin locking groove 20F is bored outward from the drive shaft insertion hole 20E.
The drive shaft 4 is inserted into the drive shaft insertion hole 20E, and the inner circumference 21A of the drive shaft 4 passing through the first guide hole 20C is guided by the drive shaft 4.
One side outer circumferential surface 8A of the knock pin 8 whose outer circumference 21B is guided to the first guide hole 20C, whose one end 21C is in contact with the connecting flat surface 3A of the pump cover 3, and whose other end 21D is attached to the drive shaft 4. The first limiting member 21 is placed in contact with the second guide hole 20 .
The drive shaft 4 passing through D has an inner circumference 22A guided by the drive shaft 4, an outer circumference 22B guided by the second guide hole 20D, and one end 22C of which abuts the other outer circumference 8B of the knock pin 8. , other end 22D
is in contact with the bottom 1D of the rotor storage chamber 1B.
A thrust stop device for a trochoid pump in which a limiting member 22 is arranged.