Search

EP-4736274-A1 - SOCKET CONTACT AND METHOD FOR MANUFACTURING SAME

EP4736274A1EP 4736274 A1EP4736274 A1EP 4736274A1EP-4736274-A1

Abstract

The invention relates to a socket contact for a detachable, electrically conductive plug-in connection, said socket contact comprising a lamella portion, a socket portion, and a transition region between the socket portion and the lamella portion, wherein the lamella portion has at least one contact lamella and a cylindrical receiving space having an entry opening, wherein at least one groove is provided on the inside of the lamella portion in the at least one contact lamella. The invention also relates to a method for manufacturing a socket contact.

Inventors

  • BERTSCH, MICHAEL

Assignees

  • Amphenol Tuchel Industrial GmbH

Dates

Publication Date
20260506
Application Date
20240610

Claims (15)

  1. 1. Socket contact (1) for a detachable, electrically conductive plug connection, having a lamella section (10) and a socket section (20) and a transition region (30) between the socket section (20) and the lamella section (10), wherein the lamella section (10) has at least one contact lamella (12) and a cylindrical receiving space (60) with an inlet opening (61), characterized in that at least one groove (14) is introduced into the at least one contact lamella (12) on the inside of the lamella section (10).
  2. 2. Socket contact (1) according to claim 1, characterized in that the at least one groove (14) extends in the longitudinal direction substantially axially parallel to the center line of the socket contact (1) and the at least one contact blade (12).
  3. 3. Socket contact (1) according to claim 1, characterized in that the at least one groove (14) extends longitudinally on the inside into the transition region (30).
  4. 4. Socket contact (1) according to claim 1, characterized in that the at least one groove (14) extends in the longitudinal direction of the at least one contact blade (12) in one region.
  5. 5. Socket contact (1) according to claim 4, characterized in that the region extends in the longitudinal direction over approximately one third of the axial length of the at least one contact blade (12).
  6. 6. Socket contact (1) according to claim 4, characterized in that the region extends in the longitudinal direction in the section of the contact surface layer between the at least one contact blade (12) and a plug contact partner.
  7. 7. Socket contact (1) according to claim 4, characterized in that the region extends in the longitudinal direction adjacent to the inlet opening (61) of the cylindrical receiving space (60).
  8. 8. Socket contact (1) according to claim 1, characterized in that the at least one groove (14) has a partial circle geometry cross-section at least in regions in the circumferential direction.
  9. 9. Socket contact (1) according to claim 8, characterized in that the pitch circle of the at least one groove (14) has a groove radius (RR).
  10. 10. Socket contact (1) according to claim 8, characterized in that the amount of the grooving radius (RR) is smaller than the radius of the cylindrical receiving space (60).
  11. 11. Socket contact (1) according to claim 8, characterized in that the amount of the grooving radius (RR) is smaller than half the extension width of the at least one contact lamella (12) in the circumferential direction of the lamella section (10).
  12. 12. Socket contact (1) according to claim 1, characterized in that the at least one contact blade (12) has a chord-shaped, inwardly bent cross-sectional shape in the longitudinal direction.
  13. 13. Socket contact (1) according to claim 1, characterized in that the outer contour of the socket contact (1) has a spring groove (11) and a sealing groove (21).
  14. 14. Socket contact (1) according to claim 1, characterized in that the outer contour of the lamella section (10) has at least one constriction (12').
  15. 15. Method for producing a socket contact (1) according to claim 1, characterized by the manufacturing steps: providing a socket blank as a semi-finished product or preliminary product in the form of a turned part with a lamella section (10) and socket section (20); introducing the at least one groove (14) into the lamella section (10); machining the at least one slot (13) so that at least one contact lamella (12) is formed.

Description

Description SOCKET CONTACT AND MANUFACTURING PROCESS THEREFOR The invention relates to a socket contact for a detachable, electrically conductive plug connection, having a lamella section and a socket section and a transition region between the socket section and the lamella section, wherein the lamella section has at least one contact lamella and a cylindrical receiving space with an inlet opening. The invention also relates to a method for producing a socket contact. Plug connections, contacting elements, pole connectors, plug sleeves, etc. are used in a wide variety of designs and variants to make contact or to create detachable, electrically conductive connections. In particular, but not exclusively, for electrical contacting tasks in the higher power range, contact systems have been developed that are based on round contact geometries to accommodate a contact pin and whose starting material consists of a flat contact grid that is brought into the round contact geometry with a hyperbolic twist. These contact systems, known as RADSOK, are characterized by robust and high-density contact production due to the considerable contact surface to the respective contact pin. Alternatively, instead of the hyperbolic twist situation, inward-facing lamella geometries are known, whose lamella contact grid is aligned radially symmetrically. These contact geometries, which are preferably used as high-current contact sockets, are known as radial contact sockets, lamellar contact sockets or hyperbolic contact sockets. Lamellar contact sockets can be used in different geometric variations. Lamellar contact sockets are well known, among others, in which the lamellae are formed as one piece with the lamellar contact socket at one or both of their ends in their longitudinal extension. This differing geometric structure of the lamellar contact socket has a significant impact on the contact spring force of the lamellae, which is crucial for the contact properties with the contact partner necessary for the transmission of electrical power. In the case of lamella bushings with an end bushing, the contact lamellas are formed as one piece with the bushing section at one end, while the opposite contact lamella end is freely movable. In classical mechanics, geometric situations of this type are referred to as one-sided bearings or floating bearings. For socket contacts, which in particular transfer electrical power in the high-voltage range by interacting with pin contacts and plug-in contact pins, different development goals have been pursued depending on the specific installation situation and application. In addition to economical production and the simplest possible assembly, the lowest possible loss electrical power transmission and the strength against both maximum loads and fatigue strength properties are of particular interest. In the published patent application DE 10 2014 105 534 A1, a teaching is presented for improving the contact force of socket contacts in order to improve the electrical contact and thus the electrical conductivity of the plug connection. The socket contact presented has a base body which has a receiving space for receiving a pin contact, wherein the base body has at least two contact lamellas which are arranged in such a way that they delimit the receiving space, wherein the contact lamellas each have at least one step along their length on an inner side pointing in the direction of the receiving space, so that the receiving space has a first diameter D1 and a second diameter D2 which is different from the first diameter D1, wherein the first diameter D1 in the insertion direction of the pin contact in front of the step is larger than the second diameter D2 in the insertion direction behind the step. By providing at least one step on the inside of the contact blades, the tension that occurs on the base body of the socket contact when a pin contact is inserted into the receiving space of the socket contact can be better distributed over the entire base body, so that voltage peaks on the base body can be avoided and the total tension occurring on the base body can be reduced. In particular, at the base of the blades, i.e. where the contact blades are integrally connected to a rigid part of the base body, tensions that would otherwise normally occur can be reduced. By forming a step on the inside of each contact blade, the contact blade can act like a spring connected in series to reduce the tension that occurs when the socket contact makes contact with the pin contact. stage and the reduced voltage peaks achieved thereby, the contact normal forces achievable with the socket contact can be significantly increased. DE 10 2016 123 935 A1 teaches a method for producing a socket contact comprising the steps a.) producing a hollow cylindrical contacting region at a first end of the round rod by means of extrusion, wherein the hollow cylindrical contacting region has first and second sections extending in t