CN2251189Y

CN2251189Y - Multi-contact piece combined movable contact box

Info

Publication number: CN2251189Y
Application number: CN 95206569
Authority: CN
Inventors: 张德民
Original assignee: NANYANG ELECTRICAL APPLIANCES FACTORY GUANGZHOU
Current assignee: NANYANG ELECTRICAL APPLIANCES FACTORY GUANGZHOU
Priority date: 1995-03-30
Filing date: 1995-03-30
Publication date: 1997-04-02
Anticipated expiration: 2005-03-30

Abstract

The utility model relates to a multi-contact piece combined movable contact box, which comprises three movable-contact assemblies and a movable-contact casket with two symmetrical half parts, wherein, each movable-contact assembly is provided with a plurality of pairs of zygomorphic movable-contact pieces. Each pair of movable-contact pieces is penetrated by pins. Two symmetrical pairs are pulled by a spring, and a gasket is arranged between the two adjacent pairs. The lower part is provided with a contact board, and both sides of the upper part are provided with support boards which are connected into the movable-contact assembly by a rivet. The movable-contact assemblies are arranged in positions set by the movable-contact casket, fixed by screws and connected into the movable contact box. The utility model has the advantages of stable contact position, stable contact pressure, strong over load capacity, deflection automatic adjustment and safe utilization, and is a good device used for low-voltage electric switch devices.

Description

Many contact chips combined moving contact box

The utility model relates to a kind of many contact chips combined moving contact box, is the components and parts of low electrical equipment, is suitable for various low-voltage electrical apparatus switching devices.

Present existing low pressure moving contact box, its most moving contact are that monolithic bends, and are pressing monolithic with two arc spring silks, from design angle, be the principle that adopts long line contact form, but, often do not reach the requirement of the long line contact in the design because manufacturing and fit on exist error, therefore in use, contact-making surface and contact pressure are extremely unstable, and overload power is poor, and it is too high to be easy to generate contact temperature rise, even burn out, cause fault.

The purpose of this utility model provide a kind of contact-making surface and contact pressure more stable, overload power is strong, is not easy to produce many contact chips combined moving contact box of fault.

The utility model adopts lever principle, and multi-disc point (or short-term) contact form makes each contact position (point or face) and contact pressure stable, and it is designed to Trinitarian box structure.Its structure comprises moving contact group, moving contact casket and connector.There is support plate on the two sides, front and back of each moving contact group, have several in the support plate to symmetrical moving contact sheet, every pair of moving contact sheet is with in the middle part of the pin dress, all accompany packing ring up and down, hold with tension spring for symmetrical two pairs, be provided with restriction pin axial endplay between per two pairs, avoid producing the pad of vortex flow, contact plate is equipped with in support plate bottom (also being the bottom of symmetrical moving contact sheet), and each other part all joins it together with rivet, becomes the moving contact group, with three moving contact group devices in two hemihedrism, distance is had in the moving contact casket of enough climbing journey, be screwed then, it is unified into Trinitarian moving contact box.The head of three moving contact groups is exposed on the top of box, is used to insert fixed contact, and three contact plates are stretched out in the bottom, are used to connect electrical installation.Because the boss on the contact plate top of moving contact group, in the oblong aperture of support plate bottom of packing into loosely, and rivet hole on the moving contact sheet and rivet also are loose fit, so moving contact that assembles, have the characteristics of left-right and front-back swing, during use, enough contact pressures are arranged not only, and can also regulate automatically and make and skew that rigging error is caused, make contact condition better.

Characteristics of the present utility model are that contact position and contact pressure are stable, can regulate the skew that manufacturing and rigging error are caused automatically, make contact condition keep good, and overload power is strong, and is safe in utilization, and the Trinity is easy for installation, and the utmost point is not easy to produce temperature rise and crosses high fault.

Accompanying drawing is embodiment of the present utility model.

Now specify in conjunction with the accompanying drawings:

Fig. 1, Fig. 2, Fig. 3 are respectively many contact chips combined moving contact box installation diagram, A-A, B-B cutaway view, A-A cutaway view, the assembling of expression moving contact group 1, pack into the connection assembling of moving contact group (1) of B-B cutaway view, expression moving contact casket (3).

Among the figure:

1. moving contact group, 2. tension spring,

3. moving contact casket, 4. contact plate,

5. moving contact sheet, 6. copper washer,

7. support plate, 8. rivet,

9. aluminium backing, 10. pin,

11. screw, 12. nuts,

13. packing ring.

Moving contact group (1) among Fig. 1 has 3, be placed on respectively after assembling on the position of moving contact casket (3) setting, Zincing passivation standard component M4 screw (11), nut (12), packing ring (13) 4 covers with outsourcing, being connected and fixed becomes Trinitarian many contact chips combined moving contact box, as Fig. 1, shown in Figure 3.

Moving contact casket (3) among the figure is the two halves of symmetry, adopts the compacting of unsaturated polyester glass fibre molding compound to form, and the design of interior shape can make the distance between the moving contact group (1), enough journeys of climbing is arranged, as shown in Figure 1.

Fig. 2 represents analysing and observe of moving contact group (1), wherein moving contact sheet (5) is made with rolled copper, then silver-plated 8 every group, each 4 of left-right symmetric, two is a pair of, every pair with a pin (10) dress middle part, and the aluminium that restriction pin (10) axial endplay is housed between adjacent two pairs is scurried pad (9), about symmetry the tension spring (2) that is hung in by two ends on the pin (10) is held.For the ease of tension spring (2) is installed, about between two, copper washer (6) is housed respectively.(7) two of support plates are made by corrosion resistant plate, are used for supporting, determining the position between contact plate (4) and the moving contact sheet (5).Rivet (8) is made by stainless garden steel, and each part of the moving contact group (1) that is used to be connected and fixed joins together, promptly becomes moving contact group (1).Contact plate (4) is made with the thick rolled copper of 6mm, and is then silver-plated, and its top contacts with the bottom of moving contact sheet (5), the boss of its upper end, in the oblong aperture of support plate (7) of packing into loosely, moving contact casket (3) is stretched out in its underpart, has a hole to be used to connect electrical installation.

Each moving contact group (1) is equipped with each 4 of the rivet (8) made by the garden steel, pins (10), (9) two of the aluminium backings of being made by aluminium sheet, (2) 2 of the tension springs of being made by carbon spring steel wires, (6) 8 of the copper washers of being made by cold rolling brass sheet.

Corresponding both sides, moving contact sheet (5) left and right sides, top and the bottom are arcuation, and effect is to be convenient to insert and contact.Cooperating between the rivet hole above it and the rivet become flexible, and when effect is to use, inserts fixed contact, makes it have the advantages that to regulate skew automatically, makes contact condition keep good.

Claims

1, a kind of many contact chips combined moving contact box, have moving contact and contact plate, it is several to symmetrical moving contact sheet to it is characterized in that moving contact has, every pair all connects the middle part by pin, and the top and the bottom between every pair are provided with copper washer, and symmetrical two pairs are connected by tension spring, be provided with aluminium backing between adjacent two pairs, the bottom is provided with contact plate, and the two sides, top is provided with the steel support plate, is connected into the moving contact group by rivet; Three moving contact groups are arranged on the position that the moving contact casket of two hemihedrism sets, and are fixed by screw attachment.

2, many contact chips combined moving contact box according to claim 1 is characterized in that between rivet hole on the moving contact sheet and the rivet be loose fit.

3, many contact chips combined moving contact box according to claim 1 is characterized in that moving contact sheet and contact plate are two choristas.

4, many contact chips combined moving contact box according to claim 1 is characterized in that the boss on contact plate top and the oblong aperture of support plate are loose fit.