JPH0440179U

JPH0440179U -

Info

Publication number: JPH0440179U
Application number: JP8192090U
Authority: JP
Priority date: 1990-08-01
Filing date: 1990-08-01
Publication date: 1992-04-06

Description

[Brief explanation of drawings]

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、２０Ｃ
……駆動軸挿入孔、２０Ｄ……ガイド孔、２０Ｅ
……係止段部、２０Ｆ……係止溝、２１……制限
部材、２１Ａ……挿通孔、２１Ｃ……一側面、２
１Ｄ……他側面。 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, 20C
...Drive shaft insertion hole, 20D...Guide hole, 20E
... Locking step, 20F ... Locking groove, 21 ... Limiting member, 21A ... Insertion hole, 21C ... One side, 2
1D...other side.

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. A drive shaft insertion hole 2 is inserted from one side surface 20A of the pump cover side toward the other side surface 20B of the inner rotor 20 facing the bottom 1D of the rotor storage chamber 1B.
0C and the other side surface 2 facing the bottom 1D of the rotor storage chamber 1B of the inner rotor 20.
A guide hole 20D that is concentric with the drive shaft insertion hole 20C and has a larger diameter than the drive shaft insertion hole 20C is drilled from 0B toward one side surface 20A of the inner rotor 20 on the pump cover side, and is connected to the drive shaft insertion hole 20C and the guide hole 20D. The hole 20B is connected to the inner rotor 20 via the locking step 20E, and the drive shaft insertion hole 20C is connected to the drive shaft insertion hole 20C through the center of the drive shaft insertion hole 20C and is locked from at least one side surface 20A on the pump cover side. A locking groove 20F is formed that reaches the stepped portion 20E and extends outward from the drive shaft insertion hole 20C, and the drive shaft 4 is inserted into the drive shaft insertion hole 20C and the guide hole 20D, and is inserted into the rotor storage chamber 1B. In the guide hole 20D of the arranged inner rotor 20, the drive shaft 4 is inserted into the inner circumference, the outer circumference is guided to the guide hole 20D, the other side surface 21D is in contact with the bottom 1D of the rotor storage chamber 1B, and one side surface is in contact with the bottom 1D of the rotor storage chamber 1B. 21C is arranged to abut on the locking stepped portion 20E, and on the other hand, a knock pin 8 passing through the axis of the drive shaft 4, protruding outward from the drive shaft 4, and integrally attached to the drive shaft 4. is engaged with and arranged in the locking groove 20F of the inner rotor 20, and the drive shaft 4 of the knock pin 8
One side surface 21 of the limiting member 21 with a more protruding outer surface
The flat end surface 6A of the driving force transmission gear 6 disposed at the end of the drive shaft 4 on the drive source side protruding from the pump case 1 and perpendicular to the longitudinal axis direction of the drive shaft 4 is in contact with the pump case 1. Regulation flat end surface 2 that can be formed integrally with
Trochoid pump thrust stop device in contact with A.