CN2139643Y

CN2139643Y - Thrust device of worm-and-wheel gear for butterfly valve

Info

Publication number: CN2139643Y
Application number: CN 92238325
Authority: CN
Inventors: 章祖翼
Original assignee: HUANGYAN CITY SPECIAL VALVE FACTORY
Current assignee: HUANGYAN CITY SPECIAL VALVE FACTORY
Priority date: 1992-10-20
Filing date: 1992-10-20
Publication date: 1993-08-04
Anticipated expiration: 2002-10-20

Abstract

The utility model relates to a thrust device of worm and worm wheel transmission which is formed by that the thrust device of worm and worm wheel transmission is provided with a transmission box, a worm and a worm wheel are arranged in the transmission box, the worm is driven by a handwheel, clamping plates are arranged on the shaft joint of the worm, the clamping plates are fixed on the transmission box, and the clamping plates are two clamping sheets. The utility model blocks the axial force of the worm when the worm is operated. The utility model is especially suitable for being matched with the technique of the class of butterfly valves, as the rotational speed is slow, and the operating time is short. The utility model has the advantages of simple structure, convenient processing, easy installation and low cost.

Description

Thrust device of worm-and-wheel gear for butterfly valve

The utility model relates to Worm and worm-wheel gearing, is specially adapted on the butterfly valve.

Worm and gear is a kind of variable transmission mechanism commonly used, when worm screw drives the worm gear rotation, produces an axial force on worm screw, and prior art is generally installed thrust bearing on worm screw.For the product that drives butterfly valve one class as worm and worm gear, be characterized in rotational velocity slow (driving) with handwheel, and the operating time is very short, the process worm gear of general standard-sized sheet or complete shut-down only changes 90 °, if adopt thrust bearing, subject matter is complex structure, transmission case body processing trouble, inconvenience is installed, the expense height.

The purpose of this utility model provides a kind of simple in structure, and processing, installation stop the thrust device of worm screw axial force extremely easily.

The thrust device of the utility model worm and gear transmission is: transmission case body is arranged, worm and gear is installed in casing, worm screw is driven by handwheel, on the joint of worm screw clamp is installed, and clamp is fixed on the casing.

The thrust device of butterfly valve worm and gear of the present utility model transmission, the clamp that is installed on the worm screw joint is made up of two cards.

The utility model relates to the thrust device to the worm screw axial force of worm and gear transmission, be specially adapted to drive complete sets of Techniques as butterfly valve one class, because of its rotational velocity slow, operating time is short, adopt this device compared with the prior art, have simple in structurely, process and install very convenient, laborsaving, expense is low, and is effective.

Fig. 1 is the utility model Worm and worm-wheel gearing and thrust device schematic representation;

Fig. 2 is the utility model thrust device clamp plan view;

Fig. 3 is the utility model thrust device clamp side view;

Below in conjunction with Fig. 1-Fig. 3 embodiment of the present utility model is elaborated.

The utility model is to the thrust device of worm screw axial force in the worm and gear transmission, connect worm screw with handwheel 8 by spring straight pin 11, handwheel can be made with the phenolic glass fiber material, worm screw can be by the plug 6 outer injection moulding nylon screw threads 7 of steel, nylon lining 5 is installed in worm screw and transmission case body 1 rotation place, 9, the axial force of worm screw when driving worm gear 3 rotations come thrust by clamp 10, clamp is made up of two cards 12, clamp is installed on the casing, this structure was both simple, and material is economized, clamp, lining, handwheel, the machine shaping of worm screw is very laborsaving, at the bottom of the cost, and and effect can satisfy fully the technical requirements of drive butterfly valve etc.The positioning screwn 2 of worm gear 1, the valve rod 4 that links with worm gear.

Claims

1, the thrust device of butterfly valve worm and gear transmission has transmission case body 1, and worm gear 3 worm screws 6 are installed in casing, and worm screw is driven by handwheel, it is characterized in that on the joint of worm screw 6 clamp 10 being installed, and clamp is fixed on the casing 1.

2, the thrust device of worm screw as claimed in claim 1, the clamp that it is characterized in that being installed on the worm screw joint is made up of two cards 12.