CN2063287U

CN2063287U - Safety switch

Info

Publication number: CN2063287U
Application number: CN 90210277
Authority: CN
Inventors: 王赓尧; 张颖; 宋永德
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-24
Filing date: 1990-03-24
Publication date: 1990-10-03

Abstract

The utility model relates to a safety switch used for the power system of an industrial and mining enterprise or a residential house. The utility model comprises a bakelite cover, a porcelain base plate, an upper, a middle and a lower wire connecting terminals fixed on the porcelain base plate, fixed contacts and moving contacts that are respectively connected with the upper, the middle and the lower wire connecting terminals. The utility model is characterized in that the fixing mode that each wire connecting terminal arranged in the present switch is fixed at the back of the porcelain base plate by bolts is changed to the fixing mode that each wire connecting terminal is fixed at the front of the porcelain base plate by bolts. Thus each wire connecting terminal is easy to dismantle and replace. The safety switch has the advantages of convenient maintenance, time saving and labour saving.

Description

Safety switch

The utility model belongs to a kind of safety switch that is applied in industrial and mining enterprises and the residential houses electric power system.

The safety switch of at present commercially available and extensive use, its each parts (comprising moving contact, fixed contact and binding post etc.) all adopt bolt to fix at the back side, porcelain chassis, and use resin encapsulation.Connect reasons such as loose and power network fluctuation like this when switch excess load, galvanized wire or lead and cause sparking or the sparking of each holding screw place between contact, even cause the galvanic corrosion or the sintering of original paper, when causing switchgear to damage, be difficult to the parts that damage are changed, thereby generally all adopt new switch to come integral replacing, so not only cause waste economically, and time-consuming, effort, even cause the power failure of long period, influence the ordinary production of enterprise.

At the deficiency that above-mentioned prior art exists, the purpose of this utility model provides the safety switch that a kind of moving contact, fixed contact and binding post are convenient to change, and makes it to reduce maintenance cost.

The purpose of this utility model is achieved by the following technical solution: it comprises the bakelite cover, the porcelain chassis and be fixed on the porcelain chassis on, in, lower connecting terminal reaches the moving contact of the band handle that links to each other with the middle connecting terminal upper bracket and the fixed contact that is connected with upper connecting terminal, its main technical points is, on the porcelain chassis, install, in, give in the installing hole of lower connecting terminal and be embedded with nut, on, in, lower connecting terminal in front, porcelain chassis respectively with bolt with give the nut that buries it be connected, making it each binding post need not pull down global switch, can change easily.So both interruption duration can be shortened, and maintenance cost can be reduced again.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model structural representation.

Fig. 2 is the A-A cutaway view among Fig. 1.

Fig. 3-the 4th, connection terminal structure figure.

Fig. 1-4 is an embodiment of the present utility model, it is a fundamental mode with the HK2-30A safety switch, keep porcelain chassis 1 and the external form and the installation dimension of bakelite cover 8 up and down, on, in, lower connecting terminal 6,3,2 adopt same structure (seeing Fig. 3-4), each binding post is the location hole by separately 12 and be through the bolt 11 in this location hole and give and be embedded in that the nuts in the installing hole 9 10 are connected with porcelain chassis 1 on the porcelain chassis 1 respectively, be connected by bolt 16 and fixed contact 7 on the upper connecting terminal 6, it is that screw connects that middle connecting terminal 3 and support 4 become present riveting connection, be connected with the moving contact 5 of band porcelain handle 13 on the support 4, give being embedded with nut 14 in the porcelain handle 13, moving contact 5 upper ends are by bolt 15 and give and bury nut 14 and be connected with porcelain handle 13.When binding post causes sparking of turnbuckle screw place even sintering because of the galvanized wire that connects or reasons such as wire relaxes and power network fluctuation, binding post can be changed by backing out bolt 11.

Claims

1, a kind of safety switch that is used for industrial and mining enterprises and residential houses electric power system, upper, middle and lower binding post on it comprises bakelite cover, porcelain chassis and is fixed on the porcelain chassis reaches moving contact that has handle that links to each other with the middle connecting terminal upper bracket and the fixed contact that is connected with upper connecting terminal, it is characterized in that: on the porcelain chassis, install, in, give in the installing hole of lower connecting terminal and be embedded with nut, each binding post in front, porcelain chassis respectively by bolt with give the nut that buries it is connected on the porcelain chassis.

2, safety switch according to claim 1 is characterized in that: give being embedded with nut at handle, moving contact upper end is by bolt and give and bury the handle inner nut and handle is connected.