CN103439548A - Electric energy meter binding post internally provided with arc-shaped spring washer - Google Patents

Abstract

The invention relates to a connection post of an electric energy meter with a built-in arc-shaped spring gasket, in particular to a connection method between a connection terminal of the electric energy meter and a wire, and belongs to the technical field of electrical equipment. The technical solution is: a binding post body (8), the binding post body (8) is provided with a connecting terminal (1) and a bottom binding post wire hole (5), the connecting terminal (1) and the bottom binding post wire hole (5) In the vertical direction, fastening screw rods (4) and fastening screw holes (6) are respectively provided, and arc-shaped spring washers (10) are arranged in the terminal (1) and below the fastening screw rods (4). The beneficial effects of the present invention are: the wire core is protected, the fastening screw is prevented from loosening and falling off due to vibration, the contact area is increased, the phenomenon of heating and burning electric energy at the connecting point of the terminal is prevented, and the length of the terminal is extended. And the service life of the wire, has the characteristics of simple structure and convenient use.

Description

Energy meter terminal with built-in curved spring washer

technical field

The invention relates to a connection post of an electric energy meter with a built-in arc-shaped spring gasket, in particular to a connection method between a connection terminal of the electric energy meter and a wire, and belongs to the technical field of electrical equipment.

Background technique

At present, the widely used electric energy meter terminals on the market all adopt the screw twisting and crimping method to realize the connection with the wire. Referring to accompanying drawing 1, place the wire core in the terminal block, and tighten the fastening screw to realize the connection with the wire. Although this crimping method can also achieve a fast connection with the wire, if the screw is too large, it will damage the core of the insulated wire and cause crimping marks to varying degrees, which will weaken the structural strength of the wire over time. If the screw is too small, the indentation of the wire core by the screw will be reduced, but the bottom of the screw will not contact the wire. Fully contacting the surface of the core will also lead to an increase in the contact resistance. In addition, even if the bottom of the screw is fully in contact with the conductor core, there is only one screw point in contact with the surface of the conductor core. Since the size of the contact resistance is inversely proportional to the size of the contact area, the point-to-surface contact directly reduces the contact area and increases the resistance value. It can be seen that the above factors will lead to an increase in the contact resistance value. When the wire flows through the current, it will generate heat at the terminal, especially when the load current is large, the degree of heat generation at the connection will be increased, the oxidation process of the wire core will be accelerated, and the service life of the terminal and the wire will be greatly reduced. , At the same time, it is very easy to cause the tail of the electric energy meter to burn out, and even cause a larger power outage. In addition, resonance often occurs on electrical equipment in daily operation, and long-term vibration will cause loosening or even falling off of the tightened fastening screw rod, which will also cause resistance at the connection between the electric energy meter and the wire. Increase, the consequences of the connection point heating and burning the tail of the electric energy meter.

Contents of the invention

The purpose of the present invention is to provide an electric energy meter terminal with a built-in arc-shaped spring gasket, which can realize the connection with the wire by crimping the arc-shaped spring gasket inside the terminal and the wire core, and solve the problems existing in the background technology .

Technical scheme of the present invention is:

The utility model relates to a terminal of an electric energy meter with a built-in arc-shaped spring gasket, which has a terminal body. The terminal body and the wire hole of the bottom terminal are provided on the body of the terminal. Fastening screw rods, fastening screw holes, arc-shaped spring washers are arranged in the terminal and below the fastening screw rods; two fastening screw rods are arranged on the vertical direction of the terminal, and two fastening screw rods are arranged under the two fastening screw rods. The arc-shaped spring gaskets are respectively arranged in the connecting terminals; the arc-shaped spring gaskets are in the shape of "3", and the "3"-shaped arc-shaped spring gaskets produce an upward reaction under the action of the gasket spring The force prevents the loosening of the fastening screw rod. The fastening screw rod acts on the arc-shaped spring washer to protect the surface of the wire core from indentation. The arc-shaped part of the arc-shaped spring washer and the circular surface of the wire core are fully Contact, to achieve surface-to-surface crimping, increase the contact area, and reduce contact resistance.

A square hole larger than the diameter of the fastening screw rod is cut on both sides of the wire hole of the terminal.

Two fastening screw rods and two fastening screw holes are respectively arranged on the vertical direction of the connecting terminal and the bottom terminal wire hole, and the two sides of the bottom terminal wire hole under the two fastening screw rods are cut larger than the tight Fix the square hole with the diameter of the screw rod, place the arc spring washer horizontally between the two square holes, the length of the arc spring washer is consistent with the overall width of the terminal, and the width of the arc spring washer is slightly Smaller than the width of the square hole, the arc-shaped spring gasket moves up and down along the frame of the square hole, the arc-shaped spring gasket is in the shape of a "3", and the "3"-shaped spring fully fits the lower edge of the square hole, and Under the action of the washer spring, an upward reaction force is generated, which makes the fastening screw more firm and prevents loosening and falling off caused by vibration.

The beneficial effects of the present invention are: the wire core is protected, the fastening screw is prevented from loosening and falling off due to vibration, the contact area is increased, the phenomenon of heating and burning electric energy at the connecting point of the terminal is prevented, and the length of the terminal is extended. And the service life of the wire, has the characteristics of simple structure and convenient use.

Description of drawings

Fig. 1 is the structural representation of background technology;

Fig. 2 is a front view of the present invention;

Fig. 3 is a side view of the present invention;

Fig. 4 is an enlarged view of the arc-shaped spring washer of the present invention;

In the figure: terminal 1, wire 2, fastening screw cap 3, fastening screw rod 4, bottom terminal post wire hole 5, fastening screw hole 6, fixing screw hole 7, terminal post body 8, arc spring washer 10.

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described by examples.

With reference to accompanying drawings 2, 3, 4, a kind of watt-hour meter terminal with built-in arc-shaped spring gasket has a terminal body 8, which is provided with terminal 1 and bottom terminal wire hole 5, terminal 1 Two fastening screw rods 4 and two fastening screw holes 6 are respectively arranged on the vertical direction with the bottom terminal wire hole 5, and the two sides of the bottom bottom terminal wire hole 5 below the two fastening screw rods 4 are cut larger than Tighten the square hole with the diameter of the screw rod 4, place the arc spring washer 10 horizontally between the two square holes, the length of the arc spring washer 10 is consistent with the overall width of the terminal 1, and the arc spring is The width of gasket 10 is slightly smaller than the width of the square hole, so that the arc spring gasket can move up and down along the frame of the square hole. The arc spring gasket 10 is in the shape of "3", and the "3" spring also It will fully fit the lower edge of the square hole, and generate an upward reaction force under the action of the washer spring, making the fastening screw more firm and preventing loosening and falling off caused by vibration.

Working process: Insert the wire core of the wire 2 into the terminal 1, rotate the fastening screw cap 3, and as the fastening screw rod 4 moves downward, the arc-shaped spring washer 10 approaches the surface of the wire core and tightens it tightly. When the fixed screw rod is rotated to a certain position, the arc spring washer 10 will be tightly fitted with the circular surface of the conductor core. Since the arc spring washer is similar to the surface shape of the conductor core, the arc spring washer and the wire core can Full contact realizes surface-to-surface crimping, increases contact area, reduces contact resistance, and avoids the problem of high contact resistance caused by point-to-surface contact. At the same time, the fastening screw rod acts on the arc-shaped spring washer. Since the material of the arc-shaped spring washer has a higher compressive strength than the material of the copper core wire, it will not cause indentation, and the purpose of protecting the wire core is achieved. When the fastening screw rod is loosened, as the fastening screw rod moves upward, the moving distance of the arc-shaped spring washer increases. When the screw reaches a certain position, the wire core can be pulled out from the terminal, and the removal of the wire can be completed. the process of.

Claims (3)

1. the connection box of electric energy meter post of a built-in arc spring pad, it is characterized in that having binding post body (8), binding post body (8) is provided with connection terminal (1) and bottom binding post line hole (5), be respectively equipped with fastening screw screw mandrel (4), fastening screw (6) on the vertical direction in connection terminal (1) and bottom binding post line hole (5), in connection terminal (1) and below being positioned at fastening screw screw mandrel (4), be provided with arc spring pad (10); Described connection terminal (1) vertical direction is provided with two fastening screw screw mandrels (4), two fastening screw screw mandrels (4) belows be positioned at connection terminal (1) respectively correspondence be provided with arc spring pad (10); Described arc spring pad is " 3 " font; " 3 " font arc spring pad is under the effect of pad spring; produce reacting force upwards; prevented the loosening of fastening screw screw mandrel (4), fastening screw screw mandrel (4) acts on the arc spring pad, has protected the wire wicking surface to avoid impression; arc spring pad arch section fully contacts with wire core circular surface; realize the crimping of face and face, increase contact area, reduce contact resistance.

2. the connection box of electric energy meter post of built-in arc spring pad according to claim 1, is characterized in that two lateral incisions in described binding post line hole are greater than the square hole of holding screw shank diameter size.

3. the connection box of electric energy meter post of built-in arc spring pad according to claim 1 and 2, it is characterized in that being respectively equipped with two fastening screw screw mandrels on the vertical direction in described connection terminal and bottom binding post line hole, two fastening screws, in bottom binding post line hole, two fastening screw screw mandrel belows, two lateral incisions are greater than the square hole of holding screw shank diameter size, the arc spring pad is horizontally placed between two square holes, the integral width of arc spring pad length and connection terminal is consistent, the width of arc spring pad is slightly less than the width in square hole, the arc spring pad is along moving up and down in the framework of square hole, the arc spring pad is " 3 " font, " 3 " font spring and square hole are low along fully laminating, and produce reacting force upwards under the effect of pad spring, prevent from vibrating becoming flexible and coming off of producing.

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