Three-phase four-wire plug and socket plugging assembly

Abstract

The invention relates to a three-phase four-wire plug and socket plugging assembly, which comprises a plug assembly and a socket assembly, wherein four male end binding posts are arranged on the bottom surface of a plug shell of the plug assembly; a plug body is arranged on the top surface of the plug shell; a concave annular zero line, a U-phased contact, a V-phase contact and a W-phase contact are arranged on the plug body; four male end binding posts are connected with corresponding contacts respectively; a socket core is arranged in a socket shell of the socket assembly; a center jack is arranged in the socket core; an arc-shaped contact and a contact pressure spring are arranged on the outer wall of the socket core; the contact pressure spring is extruded between the contact and the inner wall of the socket shell; a coaxial taper contact is arranged in an inner cavity of the socket shell; four female end binding posts are arranged at the bottom of the socket shell; the female end binding posts are correspondingly connected with annular groove inner contacts and the taper contact through wires; three annular groove inner contacts are correspondingly connected with and communicate with the zero line, the U-phased contact and the V-phase contact respectively; and the taper contact is connected with and communicates with the W-phase contact.

Description

technical field [0001] The invention relates to a socket assembly, in particular to a three-phase four-wire plug socket assembly. Background technique [0002] Since Nikola Tesla invented alternating current, it has been widely used in various fields of people, and its plug and socket structure has been followed until now. There are single-phase two-wire, single-phase three-wire, three-phase four-wire, and three-phase five-wire systems. There are two types of plugs: rectangular flat plugs and cylindrical plugs. [0003] Plugs and sockets in various countries now adopt this structural form, but the relevant positions of the plugs and sockets are arranged differently. The socket contacts that are contacted by flat or cylindrical plugs generally use U-shaped elastic copper sheets or semi-arc elastic copper sheets as conductive contacts. Components, the contact elements of these two structural forms can only be contacted by point, multi-point, line, and multi-line. The contact ...

AI Technical Summary

Problems solved by technology

[0003] Plugs and sockets in various countries now adopt this structural form, but the relevant positions of the plugs and sockets are arranged differently. The socket contacts that are contacted by flat or cylindrical plugs generally use U-shaped elastic copper sheets or semi-arc elastic copper sheets as conductive contacts. Components, the contact elements of these two structural forms can only be contacted by point, multi-point, line, and multi-line. The contact area is small, the overload current is small, and it is easy to generate arcs. The tightening force drops and the plug is easy to loosen, resulting in an increase in resistance or an open circuit, resulting in abnormal operation of electrical equipment

In the structure of the existing contacts, many schemes cannot make the contact area of ​​the contact larger than the diameter of the wire

In addition, there is a defect that the contact piece is easy to loosen when the pressing force is too small, and the plug is difficult to plug and unplug when the pressing force is too large

The existing sockets in various countries have two-hole single-phase two-wire, three-hole single-phase three-wire, four-hole three-phase four-wire, and five-hole three-phase five-wire systems. Due to different specifications, they cannot be interchanged universally. The voltage is between 110V and 220V. Separate and cannot be universally interchanged. A special conversion plug is required. When inserting, it needs to be aligned with the position of the hole, which makes it inconvenient to insert, and it is not possible to use the same socket for single-phase and three-phase.

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