CN87202489U

CN87202489U - Four-pin plug and socket

Info

Publication number: CN87202489U
Application number: CN 87202489
Authority: CN
Inventors: 龚伟海
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-02-25
Filing date: 1987-02-25
Publication date: 1987-10-21

Abstract

The utility model provides a new style four-pins plug and a new style four-holes socket which are breaking-proof and waterproof. A protective sleeve and a buffering sleeve which are made of the material of rubber class and have the efficiency of sealing and impulse reducing are arranged on the part from which water can enter when the outer shells are probably be attacked (finger to natural falling) and under usual situations. So the outer shell of the plug can keep from being damaged when the plug falls down freely onto the cement ground from the height of 3 meters. The working life of the plug can be prolonged, and short cut caused by water entering can be avoided simultaneously. The most parts of the utility model are the same as the present general products. So the cost of product change is low. The utility model is suitable for industrial and mining enterprises, especially for open air working place.

Description

Four-pin plug and socket

The utility model relates to line connector, particularly a kind of four eyed plug and socket.

Industrial used 380V four eyed plug body all uses insulating material such as bakelite, plastics to make usually at present, and in general, these materials are all more crisp, can not bear greater impact power.In actual use, be of common occurrence owing to plug falls the phenomenon that causes the plug body fragmentation on the ground.And, workplace in the open, when plug, socket were drenched by two water, water was easy to enter in the socket along pin, causes short circuit, and this class accident also happens occasionally, and all this kind makes the people feel inconvenience deeply.

The purpose of this utility model is to provide a kind of and anti-ly falls, the novel four eyed plug and socket of waterproof.

The purpose of this utility model realizes by following method: may be subjected to impacting (referring under situation about dropping naturally) and the position that may intake in normal circumstances at plug body and be provided with what rubber or plastics and so on material was made and have sealing, reduce the protective sleeve of momentum performance or subtract towards overlapping, that is:

(1) subtracting towards seal protection cover near on the plug casing at socket place ring-type being set;

(2) on the end face of socket, be provided with to subtract at plug casing and dash central seal that cover formed and subtract and dash the protection head by central shaft and the center that is enclosed within its outside;

(3) subtract towards sheath in the setting of the middle part of socket-head cap;

(4) at end cap and housing junction the end cap protective sleeve is set.Simultaneously, the structure of socket and above-mentioned plug are complementary, promptly the structure of common four eyed socket are done following corresponding change:

(1) forms the concave station rank in jack housing and plug contact-making surface place;

(2) open a central seal at the socket center and subtract a duct that is complementary towards the protection head with above-mentioned plug;

(3) in jack housing and distribution panelboard junction rubber or plastic seal ring are set.

Plug of the present utility model can be from 3 meters eminence free falls on concrete floor and plug body does not damage, thereby improved plug useful life, reduced consumption indirectly, and plug and socket structure of the present utility model can prevent effectively that rainwater from entering in the plug and socket, avoided the short circuit that causes because of water inlet.

In addition, most of design of part of the present utility model, the size all product with at present general are identical, need not upgrade a lot of equipment and molds so make this new product, thereby greatly reduce the expense of changing the line of production.

The utility model is applicable to industrial and mining enterprises, and use particularly open-air workplace.

Below with reference to accompanying drawing the utility model is described in further detail, wherein

Fig. 1 is an outline drawing of the present utility model.

Fig. 2 is the full sectional view of Fig. 1.

Embodiment 1-plug

See figures.1.and.2, the outstanding circular step in several roads is arranged on the external diameter of central shaft 20, the center of being made by the insulating material of oil resistant rubber, asbestos, nylon or plastics and so on subtracts and dashes cover 11 and be stationary fit with central shaft 20, packs in the plug casing 4 as an integral body, in the hole of centering position.There are two boss rank that prevent that central shaft 20 from rotating on this limit, hole, and they match with two concave station rank on the central shaft, screw on nut 12, and central shaft 20 is fixed on the plug casing 4.Because subtracting towards cover 11 is to make with rubber and so on material, thereby has good oil resistance and plasticity.When plug falls down, subtract and dash cover and land earlier, reduce the momentum of active force, guarantee that plug casing is not broken plug body.

Housing 4 is having an annular groove near on the face of cylinder at socket place, subtracts towards the inner bulge part of seal protection cover 6 closely to be embedded in this groove.Behind plug insertion socket; the big ring end of this protective sleeve contacts with the left side of jack housing 7; seal as first road; and the little ring of said protective sleeve 6 inserts in the concave station rank of jack housing left end; both closely combine; form second road sealing, guarantee that water does not leak in the pin and socket.

If just in case there is low amounts of water to pass first road sealing, then will finally flow to ground downwards along subtracting towards the groove (see figure 2) of seal protection cover 6 jack housing of flowing through.So adopt above two seals, can prevent effectively that sealing enters pin and socket inside.

In the screw of tight-hanged screw 1 precession central shaft 20, fixedly end cap 15 and housing 4.

End cap protective sleeve 3 is inserted in end cap 15, and end cap subtracts towards sheath 2 and is bonded at end cap 15 tops.Subtracting towards the centre of sheath 2 at end cap has a perforation, and the mouth in this hole is gone up and expanded a counterbore that is slightly larger than tight-hanged screw 1 afterbody external diameter, and its degree of depth is generally than the dark 3-4 millimeter of the thickness of tight-hanged screw 1 afterbody.Above-mentioned these protective sleeves make junction form a sealing area, can stop rainwater to enter plug, can prevent to take place when plug from throwing accidentally broken again.

There is a location step at place, the back side of end cap 15, is complementary with the left end step of housing 4, plays positioning action.

The head of four pins 5 is opened an axial through grooves respectively, to strengthen the head elasticity of pin 5, makes it to engage well with metal jack (sleeve pipe) 10.There is a step centre of pin 5, has two grooves on step, by nut 19 pin 5 is fixed on the housing 4.Electric wire is fixed on the pin 5 by copper sheathing 13 and nut 14.

Electric wire is introduced from the hole of plug casing 4 downsides, and turn solidus screw 17 drives solidus plate 16 and moves, and plays the effect of solidus.Under normal conditions, an O-ring seal if adapt to certain special workplace and environment, then can be adorned because position relation is difficult for water inlet in this section zone in the plug lower-side hole, with prevent water from this in electric wire inflow plug casing 4.

Embodiment 2-socket

Referring to Fig. 2; socket of the present utility model is identical with common socket basically; but for the plug with the foregoing description 1 is complementary; on the contact-making surface place formation concave station rank of jack housing 7 with plug; and open a plug central seal with embodiment 1 in the middle of the socket and subtract and dash a protection duct that is complementary, for its insertion.Considering owing to the distribution panelboard air spots to cause rainwater to enter its inside from the socket right-hand member, thereby adorn a sealing ring 8 in jack housing 7 and distribution panelboard junction, the material of sealing ring can be according to different operational environment decisions, present embodiment adopts oil-proof rubber, so that it has the wider scope of application.In addition, the porcelain seat 9 that is positioned at jack housing 7 is in order to insulation and metal sleeve 10 is installed, and by hold-down screw 18 jack housing is connected with the wiring distribution panelboard with the porcelain seat.

Claims

1, a kind of four eyed plug, it comprises that plug body reaches and its pin that connects mutually, is characterized in that:

(1) subtracting towards seal protection cover 6 near on the plug casing 4 at socket place ring-type being set;

(2) on the end face of socket, be provided with to subtract at plug casing 4 and dash cover 11 central seal of being formed and subtract and dash the protection head by central shaft 20 and the center that is enclosed within its outside;

(3) setting subtracts towards sheath 2 around the tight-hanged screw 1 of end cap 15;

(4) in the junction of end cap 15 and housing 4 end cap protective sleeve 3 is set.

2, plug according to claim 1; it is characterized in that said subtracting towards the inner bulge part of seal protection cover 6 closely is embedded in the annular groove of housing 4; behind plug insertion socket; its big ring end face contacts with the end face (with the contacted face of plug) of jack housing 7, and little ring closely inserts in the concave station rank of jack housing end face.

3, plug according to claim 1 and 2 it is characterized in that institute's said central subtracts to dash cover and can be made by rubber, asbestos, nylon or plastics and so on insulating material, and other protective sleeves can be made by rubber or plastics.

4, the socket that is complementary of the described plug of a kind of and claim 1 is characterized in that:

(1) forms the concave station rank in the contacted end of jack housing 7 and plug;

(2) opening one at the center of jack housing 7 subtracts with the described plug central seal of claim 1 and to dash the duct that the protection head is complementary;

(3) in jack housing 7 and distribution panelboard junction rubber or plastic seal ring 8 are set.