JPS5849075U

JPS5849075U - Worm reduction mechanism in valve actuator

Info

Publication number: JPS5849075U
Application number: JP14490081U
Authority: JP
Inventors: 立森　茂光
Original assignee: 株式会社島津製作所
Priority date: 1981-09-28
Filing date: 1981-09-28
Publication date: 1983-04-02
Also published as: JPS616390Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、バルブアクチュエータに組込まれたウオーム
減速機構を示した側断面図、第２図はこの考案にかかる
実施例の側断面図、第３図はそのＩ−１断面を矢印方向
にみた部分断面図、第４図はこの考案にかかる別の実施
例の要部を示す部分側面図である。１・・・ウオーム軸、２・・・接続軸、４・・・駆動ピ
ン、６・・・皿ばね、７・・・ラック部、８・・・ピニ
オン、９・・・回転軸、１１・・・Ｕ字形切込み、１２
・・・半月形切込み。Fig. 1 is a side sectional view showing the worm reduction mechanism incorporated in the valve actuator, Fig. 2 is a side sectional view of the embodiment according to this invention, and Fig. 3 is the I-1 section viewed in the direction of the arrow. A partial sectional view, and FIG. 4 is a partial side view showing the main parts of another embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Worm shaft, 2... Connection shaft, 4... Drive pin, 6... Belleville spring, 7... Rack part, 8... Pinion, 9... Rotating shaft, 11...・・U-shaped notch, 12
...Half-moon shaped cut.

Claims

[Scope of utility model registration request]

The worm reduction mechanism is actuated by the rotational output of the prime mover to open and close the valve, and the axial thrust that acts on the worm during power transmission of the worm reduction mechanism is transmitted through a thrust bearing that is movable in the axial direction. The load is detected by taking out the amount of axial movement of the worm corresponding to the deflection of the spring that occurs through the connecting shaft connected to the worm, and the overload is detected. In the valve actuator, a driving pin is driven into the end of the connecting shaft through the shaft center, and a U-shaped cut is made to coaxially fit the end of the connecting shaft into the end of the worm. and half-moon-shaped notches perpendicular thereto, and the connecting shaft into which the driving pin is driven is fitted into the U-shaped notch of the worm, and the driving pin is fitted into the half-moon-shaped notch, and the shaft end face of the connecting shaft and The U-shaped notch surface of the worm facing the U-shaped notch, and the drive pin and the notch surface on the shaft end side of the half-moon notch of the worm are both brought into contact with each other, or the driving pin is connected to both notch surfaces of the half-moon notch of the worm. A worm reduction mechanism in a valve actuator, wherein dimensions of each part of the U-shaped notch, the half-moon notch, and the drive pin of the connecting shaft are selected so as to bring the worm into contact with each other.