JPH0440182U

JPH0440182U -

Info

Publication number: JPH0440182U
Application number: JP8192390U
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を示す縦断面
図、第２図は、本考案になるトロコイドポンプの
一実施例を示す縦断面図、第３図は第２図の−
線における横断面図である。１……ポンプケース、１Ａ……接続平坦面、１
Ｂ……ローター収納室、１Ｆ……ローター収納室
内周壁、４……駆動軸、４Ａ……外周面、７……
インナーロータ、８……駆動ピン、９……アウタ
ーロータ、２０……駆動ピン逃げ溝、Ｓ……溝長
さ、ｈ……溝巾。 FIG. 1 is a vertical sectional view showing a conventional trochoid pump, FIG. 2 is a vertical sectional view showing an embodiment of the trochoid pump according to the present invention, and FIG. 3 is a vertical sectional view showing a conventional trochoid pump.
FIG. 1...Pump case, 1A...Connection flat surface, 1
B...Rotor storage chamber, 1F...Rotor storage chamber peripheral wall, 4...Drive shaft, 4A...Outer peripheral surface, 7...
Inner rotor, 8... Drive pin, 9... Outer rotor, 20... Drive pin escape groove, S... Groove length, h... Groove width.

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; formed by a pump case and a pump cover covering the pump case, eccentric to one side with respect to the longitudinal axis of the drive shaft; An inner rotor and an outer rotor are arranged in a rotor storage chamber formed by the rotor, and a suction space connected to the suction path and a discharge space connected to the discharge path are formed by the external teeth of the inner rotor and the internal teeth of the outer rotor. In a trochoid pump equipped with;
Drive pins 8 having a length of l are arranged perpendicularly to the outer peripheral surface 4A of the drive shaft 4 and protrude outward from the outer circumferential surface 4A of the drive shaft 4. A drive pin relief groove on the peripheral wall 1F, which has a groove length S that is spaced from the outer circumferential surface 4A of the drive shaft 4 by more than the length l of the drive pin 8, and has a groove width h that is larger than the diameter φd of the drive pin 8. 20 is drilled toward the bottom 1D of the rotor storage chamber 1B from the connecting flat surface 1A of the pump case 1, while the drive shaft insertion hole 7A drilled in the center of the inner rotor 7 has a drive shaft inserted into the outer peripheral surface of the drive shaft 4. The trochoid pump has drive pin insertion grooves 6 into which drive pins 8 protruding outward from 4A can be inserted. The drive pin relief groove is located on the peripheral wall of the rotor storage chamber on the side where the rotor storage chamber 1B is eccentric to the drive shaft 4 and is on the longitudinal axis Y-Y of the drive pin 8 disposed on the drive shaft 4. The trochoid pump according to claim 1, which is bored in 1F.