DE102021003410A1 - Electrical plug connection - Google Patents

Abstract

The invention is a plug connection with a contact socket (1) and a contact pin (2) with a ring (3), all of which are made from the same copper. As a result, a contact resistance of < 0.03 mOhm is achieved from a closing force of > 10 N. The shoulder (2a) creates a third contact line, which significantly improves the electrical connection. A third contact line is created by the collar shoulder (2a). The connector is scalable.

Description

The invention relates to an electrical plug connection according to the preamble of claim 1.

The contact resistance is of decisive importance for the transmission of high currents in particular. The interfaces for connecting power sources via lines to the consumer are usually made using detachable connections. A contact resistance that is as low as possible is necessary in order to consume little energy at these connections. Furthermore, damage to the contact surfaces is a cause of undefined contact resistance for repeated connection and disconnection of the separation points. Spring-loaded contacts then have the disadvantage that the spring force is negatively influenced by heating the contact point and the contact pressure force decreases. Thus, these electrical connections are subject to adverse properties and causes such as B. a high spring force which then damage the contact surface when plugged together.

In the DE 102013018065A1 describes a connection technology that allows a contact pin to be inserted into a contact socket without insertion force using a combination of springs. An electrical connection is only established when a compression spring spreads open a contact spring or individual contact spring rings as a result of the action of an axial force and the compression of the compression spring associated therewith. This increases the outer diameter of the contact spring and makes contact between the contact spring and the inner wall of the contact socket. This creates a touching connection from the contact pin to the contact socket via the contact lines of the contact spring to the outside and a second contact line to the inside to the contact pin. This multi-stage contacting for electrical power transmission is dependent on the dimensional accuracy of the contact spring and pressure spring and in particular the burr-free spring ends, which can prevent circumferential line contact. The pre-assembly of the compression spring with the contact spring is feasible for mass production.

The object of the present invention is to provide a plug connection in which the disadvantages described above are eliminated and the lowest possible contact resistance is achieved. Likewise, the manufacturability should be simple, possible with modest accuracy and precision.

This object is solved by features of claim 1.

Further expedient and advantageous configurations of the invention emerge from the dependent claims.

• 1 einen Längsschnitt durch Kontaktstift im gesteckten Zustand.

The invention is explained in more detail with reference to drawings. Show it

• 1 a longitudinal section through the contact pin when plugged in.

In 1 An electrical contact ring 3 is shown which is manufactured as a copper or silver plated ring and mounted on a contact pin 2 . The contact pin 2 has a groove x in which the ring 3 lies. You can contact this after the EN 10 2017 007 091.1.

The functions of socket, ring or pin and their counterpart can be divided into three parts, namely socket 1, ring 3 and pin 2, which function both together and independently.

This makes the contact socket much easier to manufacture and can be made of any conductive, preferably malleable, material such as copper, aluminium, brass, etc. be made, since no resilient function is necessary.

The contact consists of a silver-plated ring 3 and is pressed into the socket 1 by the contact pin 2, like 1 shows.

The pressure of 15 N or higher can be dimensioned as required by the dimensions of the ring wire. The ring material can be silver-plated copper or another electrically conductive material. With a copper pin/socket and silver-plated ring, an electrical conductivity of K (kappa) = 58 is achieved, which is technically unique for connectors.

The axial movement of the contact pin 2 can be dimensioned by the conical pitch 5 of 20° in the contact socket 1. This optimally triples the force on the ring.

This way results in an adjustable compressive force of 10 - 25 N, which is sufficient to achieve the optimal contact resistance of less than 0.03 mOhm.

The invention describes the technology of how the ring contact 3 can be mounted in order to achieve a high contact force and thus a low contact resistance.

The contact pin 2 with the ring contact 3 is inserted into a contact socket 1 without insertion force. The contact force is created by the locking of the connector, such as 1 shows.

These three parts, contact pin 2, contact socket 1 and ring 3 can be bare copper, silver-plated or other materials, which optimizes the electrical conductivity.

The ring contact 3 is mounted on the contact pin 2, or can also be mounted in the contact socket 1.

The contact pin 2 and the contact socket 1 can be connected to cables with a solder connection, crimp connection or other connection techniques.

Since the insertion and withdrawal forces are almost zero, high-pole connectors can be manufactured whose number of poles is only limited by the closing force to be applied to the connector. This creates contact between all three parts 1 to 3 and 3 to 2.

The most important advantage compared to today's contacts with slotted sockets, with friction, is the ring 3. If this is guided precisely, a small insertion distance of less than 0.2 mm can be achieved.

All three parts, contact pin 2, contact socket 1 and ring 3 have an electrical function and are therefore made of highly conductive material.

The contact pin 2 has a groove that makes the ring 3 captive and pushes the ring into the contact socket 1 and the cone 9. The cone 9 has 20°. The contact pin 2 has a collar X, which is contacted axially by the ring 3 and thereby forms a third, further contact line, which makes the contact surfaces on the contact pin 2 and contact socket 3 almost the same size.

The spring deflection must be dimensioned exactly, which means that the spring force and the contact resistance can also be precisely adjusted. The contact system can be produced with very little internal friction and very small distances.

In the case of contacts with a pin diameter of >10 mm and a spring wire diameter of >1 mm, the path of the ring 3 can be increased radially. The path of the ring also determines the locking path of the bayonet or other clasps.

The contact system is scalable.

Reference List

1

contact socket

2

contact pin

2 a

Collar shoulder on the contact pin (flat surface)

3

contact ring

3 a

Contact line from ring 3 to groove 7

3 b

Line of contact from ring 3 to contact socket 1

3 c

Line of contact between ring 3 and shoulder 2a on the contact pin

4

Guide section of contact pin 2 to contact socket 1

5

Cone in contact socket 1

6

Guide section 2 contact pin to contact socket

7

Groove for securing the ring 3 on the contact pin 2

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102013018065 A1 [0003]
• DE 102017 [0008]

Claims (6)

Electrical plug connection with a contact socket (1) and a contact pin (2) , characterized in that the contact pin (2) has a ring (3) and a shoulder (2a). The ring (3) lies captively in a groove (7). The collar shoulder (2a) creates a third contact line and the three parts (1, 2, 3) are made of the same material, e.g. e.g. copper. connector after claim 1 . characterized in that the contact forces can be metered by the slope of the cone (5) in the contact socket (1). connector after claim 1 . and 2. characterized in that the ring (3) and the contact socket (1) are electrically connected via the contact pin. connector after claim 1 . to 3. characterized in that the contacts can be locked to the housing. connector after claim 1 . to 4 , characterized in that the paths when plugging, pulling and contacting are dimensioned by the slope of the cone (5) of the contact socket (1) and the collar (2) of the contact pin (2). connector after claim 1 . to 5. characterized in that the socket (1) and the pin (2) are made of copper and the contact ring (3) are made of 5 μm silver-plated copper, resulting in the electrical conductivity K <58.

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