JPH0440180U

JPH0440180U -

Info

Publication number: JPH0440180U
Application number: JP8192190U
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、１２……
アウターロータ、２０……インナーロータ、２０
Ｃ……駆動軸挿入孔、２０Ｄ……ガイド孔、２０
Ｅ……係止段部、２０Ｆ……係止溝、２１……制
限部材、２１Ａ……内周、２１Ｂ……外周、２１
Ｃ……他側面、２１Ｄ……一側面。 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, 12...
Outer rotor, 20... Inner rotor, 20
C...Drive shaft insertion hole, 20D...Guide hole, 20
E... Locking step, 20F... Locking groove, 21... Limiting member, 21A... Inner circumference, 21B... Outer circumference, 21
C...other side, 21D...one 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 a trochoid pump, a suction space connected to a suction passage and a discharge space connected to a discharge passage are formed by the external teeth of the outer rotor and the internal teeth of the outer rotor. A drive shaft insertion hole is drilled from the other side of the inner rotor facing toward one side of the inner rotor on the pump cover side, and the drive shaft is inserted from one side of the inner rotor on the pump cover side to the other side of the inner rotor. A guide hole is drilled concentrically with the insertion hole and has a larger diameter than the drive shaft insertion hole, and the drive shaft insertion hole and the guide hole are connected through a locking step inside the inner rotor. teeth,
A locking groove that passes through the center of the drive shaft insertion hole, reaches at least the locking step from the other side of the inner rotor, and extends outward from the drive shaft insertion hole, and is inserted into the drive shaft insertion hole, guide hole, and the like. The drive shaft is inserted into the guide hole of the inner rotor, which is placed inside the rotor storage chamber. A restricting member is disposed that abuts the cover and the other side abuts the locking step, while a knock pin passes through the axis of the drive shaft, protrudes outward from the drive shaft, and is integrally attached to the drive shaft. is engaged and arranged in the locking groove of the inner rotor, and the outer surface of the knock pin protruding from the drive shaft is brought into contact with the other side surface of the limiting member, and furthermore, the tip of the drive shaft in the longitudinal axis direction that protrudes from the pump case. A thrust stop device for a trochoid pump, which is made of a drive power transmission shaft that rotates synchronously with the drive source.