CN2230776Y

CN2230776Y - Screw-rod fully sealed gate

Info

Publication number: CN2230776Y
Application number: CN 94222135
Authority: CN
Inventors: 安国君
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-16
Filing date: 1994-09-16
Publication date: 1996-07-10
Anticipated expiration: 2004-09-16

Abstract

The utility model relates to a screw rod full sealed headstock gear. The utility model is characterized in that a pull rod type sleeve pipe sheathed outside a screw rod is respectively and fixedly connected to the upper part and the lower part of a machine casing of a speed reducer and is composed of a group of short pipes with different diameters; the upper end of a short pipe with the maximum diameter of upper sleeve pipes are connected to the top of the screw rod, and the lower end of a short pipe with the minimal diameter is connected to the machine casing; the upper end of a short pipe with the maximum diameter of lower sleeve pipes are connected to a casing body, and the lower end of a short pipe with the minimal diameter is connected to the lower end of the screw rod. Because the utility model uses the structure of the pull rod type sleeve pipes, the upward and downward movement of the screw rod can be kept under the sealing condition of the sleeve pipes, and the full sealing of the headstock gear is realized. The utility model can be widely used in water conservancy headstock gears, particularly small headstock gear with the load below 2 tons.

Description

The hermetically sealed headstock gear of screw

The utility model relates to a kind of sluice lifting worm-type open-close machine.

Normally used small-sized sluice headstock gear is made up of screw rod of worm reduction gear engagement, and the exposed screw rod in reductor two ends is subjected to sand cutting, weathering, corrosion, influences the application life and the operating efficiency of headstock gear.

The purpose of this utility model provides a kind of headstock gear with the screw rod sealing, solves " three erosions " problem.

Headstock gear is by being installed in the worm-gear speed reducer on the gate top cross-bar frame and forming with the screw rod of the internal thread hole at reductor worm gear center engagement, and reductor power is provided by motor, also can provide with manual rocking handle; Distinguishing characteristics of the present utility model is to fix respectively in the upper and lower part of reducer shell a rod-pulling type sleeve pipe that is set on the screw rod; Each sleeve pipe is made up of one group of different short tube of caliber, and on reductor top, the upper end of a short tube of caliber maximum is fixedly connected on the upper end of screw rod, and the lower end of a short tube of caliber minimum is fixedly connected on the casing; In the bottom of reductor, the short tube top of caliber maximum fixedly is connected on the casing, fixedlys connected with the screw rod lower end in the lower end of the short tube of caliber minimum.

Short tube quantity the best of upper sleeve and following parts casing pipe is 5.

The utility model has the advantages that,, removed " three erosions " harm owing to adopted the hermetically sealed of screw rod, prolonged headstock gear application life, improved operating efficiency, reduced the maintenance number of times of headstock gear.

Go on foot explanation below in conjunction with accompanying drawing nearly:

Fig. 1 is the structural representation of the hermetically sealed headstock gear of screw.

In Fig. 1, simplified the internal construction of worm-gear speed reducer (4), the frame and the power-equipment of reductor have been omitted simultaneously, the interior worm gear of reductor (4) is by the internal thread hole and vertical screw rod (3) engagement through reductor at its center, and the upper and lower part of reductor casing connects a rod-pulling type sleeve pipe (2), (5) respectively; Each sleeve pipe is made up of 5 different short tubes of diameter; The upper end of short tube of last sleeve pipe (2) caliber maximum connects a semiorbicular cover and a joint pin (1) links to each other with the top of screw rod (3), and the lower end of a short tube of caliber minimum is connected with casing; A upper end of short tube of caliber maximum is connected in the bottom of casing, the following bottom that terminates at screw rod of the short tube of caliber minimum in the setting of casing (5).

Because sleeve pipe adopted the rod-pulling type structure, promptly interconnect between the short tube, can move mutually again, like this with regard to guaranteed upper and lower sleeve pipe can be with the lifting of headstock gear the length of conversion sleeve pipe, guarantee the hermetically sealed of screw rod.

The selection of short tube on the sleeve pipe can be used metal material, also can use engineering plastics.

Claims

1, the hermetically sealed headstock gear of screw, headstock gear is made up of the worm-gear speed reducer that is installed on gate top cross-bar frame (4) and the screw rod (3) with the internal thread hole engagement at reductor worm gear center, the power of reductor can be taked manual mode, also can be by motor drives; It is characterized in that: reductor (4) housing upper and lower connects rod-pulling type sleeve pipe (2), (5) that are sleeved on the screw rod (3) respectively; Each sleeve pipe is made up of one group of different short tube of caliber; Last sleeve pipe (2) pipe links to each other with screw rod (3) upper end by a joint pin (1) through the upper end of short tube of maximum, and a short tube lower end of caliber minimum links to each other with reductor casing top; The upper end of short tube of setting of casing (5) caliber maximum links to each other with reductor casing bottom, and the short tube lower end of caliber minimum links to each other with the lower end of screw rod.

2, headstock gear according to claim 1 is characterized in that short tube quantity the best of sleeve pipe (2), setting of casing (5) is 5.