EP4070413A1

EP4070413A1 - Plug connection for transmitting electrical energy

Info

Publication number: EP4070413A1
Application number: EP20816137.2A
Authority: EP
Inventors: Manfred Greiner
Original assignee: Amphenol Tuchel Electronics GmbH
Current assignee: Amphenol Tuchel Electronics GmbH
Priority date: 2019-12-04
Filing date: 2020-11-25
Publication date: 2022-10-12
Also published as: US20230006396A1; WO2021110505A1; DE102019133037A1

Abstract

The invention relates to a plug connection for transmitting electrical energy by releasable contact, said plug connection comprising at least one plug contact pin and at least one contact socket, the at least one contact socket being received in a plug connector housing and the plug connector housing interacting with a slider which is movable relative thereto, so that the plug connection partners are housed in an inserted and secondarily locked contacting position. At least one detent and support geometry is integrated into the plug contact pin and interacts with the plug connector housing, so that the contacting partners are disconnected from one another when the positions thereof relative to one another are outside the secondary locking position.

Description

description

Plug connection for the transmission of electrical energy The invention relates to a plug connection for the transmission of electrical energy through detachable contacting, having at least one plug contact pin and at least one contact socket, the at least one contact socket being accommodated in a connector housing and the connector housing cooperating with a slide that can be moved relative thereto, so that the Connector partners are housed in a plugged and secondary-locked contacting layer.

Plug-in connections, contacting elements are used to make contact or to produce releasable, electrically conductive connections. Pole connectors, receptacles, etc. used in a wide variety of designs and variants. 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, plug contact pin, socket pin, contact pin, ground bolt 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 area with the respective contact pin. Alternatively, instead of the hyperbolic twisting situation, inwardly directed lamella geometries are known, the lamellar contact grid of which is oriented radially symmetrically. These contact geometries, which are preferably used as high-current contact sockets, are known as radial contact sockets or hyperbolic contact sockets, socket contacts.

RADSOK contact systems of the aforementioned type are accommodated in connector socket sleeves via their usually cylindrical outer contours and implement the further contact on the outside via the cylindrical surfaces. Contact systems of this type are usually formed from at least one lamellar socket, contact socket, socket contact and at least one plug contact pin, socket pin, contact pin.

The contacting partner of the contact socket is usually a plug contact pin, socket pin, contact pin with a geometry that is plug-compatible with the lamellar socket. Since the outer surface of the contact pin is the functional surface of the lamellar sleeve, it cannot be enclosed or not directly enclosed or received in a housing. In order to secure the plug connection consisting of lamellar socket and contact pin in its plugged, current-contacting position, various locking devices, positioning measures, the so-called secondary locking, have been designed in a non-positive and / or positive manner. The same applies to containment measures, sealing tasks, corrosion protection and various other requirements that may arise depending on the intended use. Housings of the plug connection and / or its plug connection partner often serve to protect against contact. For example, DE 102012 105 771 A1 discloses a plug with a contact socket which aims to protect against contact and the ingress of dirt and water. For this purpose, it is proposed to close the insertion opening of the contact socket with a pivotable screen element. By pivoting the cover element, the socket contact arranged in the contact socket is completely released, so that the pin contact can be inserted into the socket contact. The protective cover is a pivotably mounted panel element with an associated spring, so that the panel element is held by the spring in a closed position in which it closes an insertion opening of the contact socket and the panel element is pivoted into an insertion position by inserting a pin contact against the force of the spring in which it exposes the insertion opening.

WO 03/047047 A1 proposes a solution for the locking task. which includes different insertion forces for connecting and disconnecting the plug to the contact socket. In a socket element designed as a housing. Housing the plug connection, a bore with a groove is introduced, which is arranged on an inner surface of the bore. The hole creates a shoulder between a groove base and a hole. A flat spring is arranged in the groove to define a spring cavity between the flat spring and the shoulder and a circularly inclined turn. Another, helical or spiral spring is arranged in the spring cavity. The contact pin is designed with a conical end in such a way that it interacts with the spring combination and can be pushed into and out of the arrangement. During the pushing-in movement, the force that the helical spring requires for elastic deformation to release the bore has to be overcome; during the pushing-out movement, the elements of the flat spring have to be deformed. In order to make plug connections reliable and to be able to release the plugged connection without the use of tools, DE 102005016265 A1 proposes a plug connection with a plug and a socket, the plug engaging with the socket in the plugged state. For this purpose, a latch is attached to the circumference of the plug or socket. The latching can preferably be released by using a tool and the socket and the plug can then be separated from one another. When latching, there is a risk of destruction under mechanical stress, specifically in connection with low temperatures.

The socket element in the form of a lamellar socket has a socket body. The socket body has a circular cylindrical plug receiving space and a conductor receiving space. The connector receiving space has an inner connector receiving space and an outer connector receiving space. The inner plug receiving space has a smaller diameter than the outer plug receiving space. The outer connector receiving space thus has a larger diameter than the inner connector receiving space. A stop is formed at the transition from the outer connector receiving space with the larger diameter to the inner connector receiving space with the smaller diameter. The stop is realized by reducing the diameter.

Latching means are arranged on the outer circumference of the socket body. The latching means are arranged on the outside of the socket body in the area of the stop arranged on the inside in the socket body. The conductor receiving space is used to receive a conductor with which the socket element can be connected to a circuit. In the outer

A latching element is provided next to the stop for the connector receiving space. The latching element is preferably adjoined by an intermediate space on the side opposite the stop. Subsequent to the existing space there is a contact socket in the outer connector receiving space. The contact socket closes on the outside with the socket body, preferably flush. The contact socket is connected in an electrically conductive manner to the socket body of the socket element. This creates an electrically conductive connection from the contact socket to the conductor arranged in the conductor receiving space The contact socket is fastened in the outer connector receiving space by pressing. The gap is used to accommodate tolerances, so that it is ensured that the locking element still has enough play when the socket element is assembled. The

The outer diameter of the locking element is slightly smaller than the inner diameter of the outer connector receiving space.

When assembling the socket element, the latching element can thereby be introduced into the outer plug receiving space. The socket body is a rotating part with a cylindrical shape and a cylindrical plug receiving space and a cylindrical conductor receiving space. The contact socket is a cylindrical RADSOK socket. Individual contact surfaces located inside the contact socket form cylindrical contact surface means. The locking element is a disk made of thermoplastic material, in particular plastic material. The latching element can also be made from bent wire or a suitably slotted metal disc. The locking element has a recess in the form of a hole.

The contact pin has a first section with a first diameter. The first section is followed by a second section with a second diameter. The second diameter is smaller than the first diameter. The second section is followed by a third section. Subsequent to the second section, the third section has latching means. Towards the second section, the third section has a diameter which is larger than the first diameter, but is smaller or at most equal to the first diameter. With increasing distance from the second section or the locking means, the

The diameter of the third section, d. H. the third section is conical. The surface of the first section forms a contact surface of the contact pin.

Many of the known connector solutions are optimized and conditioned to meet a specific requirement. Most solutions have the disadvantage that both connector partners have to have a housing and are therefore complex and costly. Furthermore, complex geometric shapes are required in both plug contact partners due to functional surfaces of the plug connection both in the contact socket and in the plug contact pin. In addition to the requirements and functions already mentioned, it can be particularly important for a plug connection that the detachable plug connection only makes or realizes the electrical contact in the arrested, secured or locked end position. This requirement, function can be important in order to prevent damage to the electrical components to be contacted, arcing or unreliable contacting. The object of the invention is to further develop the existing plug contact connections, plug connection, plug contact system, contact system and at least partially reduce the existing disadvantages. In particular, a plug connection is to be created which excludes the electrical contacting of the plug connection partners before the locking position is reached.

To solve the problem, the invention proposes the conception of a single-pole electrical plug contact in the form that when a contact socket, lamellar socket, socket contact is plugged into a contact pin, plug contact pin, socket pin, contact pin without a housing or other surrounding geometries, these are not reached when the locking, (Secondary) locking position again separated from the contact pin and an electrical one

Contact is not made or is disconnected again. The arresting, locking position often, but not necessarily, corresponds to the end position of the connector partner. The invention recognizes that by integrating the latching and supporting geometries, preferably in the contact pin and / or integrating the housing elements on the side of a preferably spring-loaded contact socket, it is suitable to prevent electrical contact outside the locking position.

The invention is explained in more detail below using an exemplary embodiment in which the plug contact pin is designed as a ground connection, in conjunction with the figures. Show:

1 shows the sectional front view of the plug connection with a socket pin designed as a ground connection and the contacting partner in the form of a lamellar socket in the relative position to one another before the plugging process: FIG. 2 shows the sectional front view of the plug connection with a socket pin designed as a ground connection and the contacting partner in the form of a lamellar socket in a partially inserted situation; FIG.

3 shows the sectional front view of the plug connection with a plug pin designed as a ground connection and the contacting partner in the form of a lamellar socket in the plugged-in situation;

4 shows the sectional front view of the plug connection with a socket pin designed as a ground connection and the contacting partner in the form of a lamellar socket in a plugged and locked, secondary locked situation. Figure 1 shows the sectional front view of the connector 100 with an as

Ground connection formed socket pin 10 and the contacting partner in the form of a lamellar socket 20 in the relative position to each other before the plugging process. The position of the contact pin 10 in alignment and perpendicular to the contact socket 20 is the position before the mating process, i.e. H. the contact partners are not (yet) engaged. The assembly unit, consisting at least of the slide 110, the socket housing 120 and accommodated therein the socket contact 20 and the spring 101, is brought into the plug-in position above the socket pin 10.

The spring 101 is designed as a helical spring, compression spring and is pretensioned accordingly, so that the slide 110 in the position shown is in an end position relative to the

Socket housing 120 and against the stop, formed from at least one shoulder 112 and at least one projection 122, is displaced.

In this positioning situation, the slide 110 is frictionally supported with its at least one support hook 111 against the cone 11 and / or the bevel 12 of the contact pin 10, so that the assembly unit consisting of at least the slide 110, the socket housing 120 and the socket contact 20 received therein the spring 101 is arranged opposite the socket pin 10 in a defined position. Likewise, the support of the at least one support hook 111 is relevant to the flow of force for the compression of the spring 101, since it functions as an abutment of the spring 101 with regard to the movement force and the relative movement path of the housing 120. The continuation of the electrical contact to a voltage source, an electrical consumer or a ground connection, ground connection can take place via a cover 130. For this purpose, the socket housing cover 130 is provided with contacting means for the

Lamellar contact socket 20 equipped, which at least partially encompass the outer contour of the lamellar contact socket 20.

Contact pin side, d. H. On the plug side of the plug connection 100, all latching and support geometries 11, 12 are integrated into the contact pin 10 itself, there is no surrounding additional geometry in the form of a contact pin housing or the like in which these functions are accommodated. FIG. 1 shows a free-standing ground bolt 10, for example welded onto a vehicle body. FIG. 2 comprises the sectional front view of the plug connection 100 with an as

Ground connection formed socket pin 10 and the contact partner in the form of a lamellar socket 20 in a partially inserted situation. The plug connection 100 is partially plugged in that the plugging path of the plug pin 10 into the lamellar contact socket 20 has not (yet) taken place completely up to its end position in the contact socket 20. The end position is preferably reached after the maximum possible plug-in path and the locking, secondary locking is preferably also implemented in the end position.

The amount of the partial insertion path, shown in FIG. 2, corresponds to the distance that the socket pin 10 is inserted into the lamellar contact socket 20. The slide 110 is axially displaced relative to the housing 120 with the insertion movement and against the spring force of the spring 101. In this plug-in situation, the at least one latching hook 121 rests against the chamfer 12 of the cone 11 with a hook slope 12T. The inclined hook 121 ′ and the bevel 12 are matched to one another with regard to their incline in such a way that the deflection of the latching hook 121 is supported with a further plug-in path in the direction of the end position of the socket pin 10 in the lamellar contact socket 20. For this it is necessary that the angle of inclination of the hook bevel 12T is small enough in relation to the axial line so that self-locking of the inclined surface on the bevel 12 is reliably excluded. Usually and depending on the nature of the surface. A skew angle of less than 45 ° is possible for the surfaces that are moved relative to one another. 1'rd the plugging process, for example in the situation shown in Figure 2, aborted, in that the external plugging force to overcome further compression of the spring 101 against its already achieved spring preload is no longer exerted, the consequence is that the plug connection and the Contacting situation is ended. The spring 101 pushes the housing 120 with the lamellar bushing 20 in the axial direction out of the contacting position as a result of the stored spring force, the preload achieved and the force flow support of the at least one support hook 111 on the bevel 12 of the cone 11.

FIG. 3 shows the sectional front view of the plug connection 100 with socket pin 10 and the contacting partner in the form of a lamellar socket 20 in the plugged-in situation in the end position. The contact pin 10 is pushed into the contact socket 20 by the maximum possible insertion path. The spring 101 is compressed up to the vicinity of the block, the housing 120 is maximally retracted into the slide 110 and rests on the front side of the slide base.

The at least one support hook 111 of the slide 110 is in a partially deflected situation, which is brought about by the inner sleeve 123 of the housing 120 as a function of the path of the plug pin 10 being pushed into the lamellar socket 20. The support hook 111 is (still) in the function of the abutment for the spring 101 in the deflection situation shown and holds the slide 110 in the position in which it receives the housing 120, as far as geometrically possible.

The locking function, d. H. the secondary locking of the plug connection 100 is achieved according to this embodiment in the end position and is caused by the latching hook 121 acting behind the cone 11 on its conical surface 11 ′ behind the cone 11 and releasably holding the housing 120 in a non-positive manner.

FIG. 4 illustrates the sectional front view of the plug connection 100 with a socket pin 10 designed as a ground connection and the contacting partner in the form of a lamellar socket 20 in an inserted and locked, secondary locking situation. With the deflection of the at least one support hook 111 out of its support position on and against the cone 11 and / or the bevel 12 of the contact pin 10 and, as a result, out of its abutment function, the slide 110 is axially and relative to the housing 120 by the pretensioned spring 101 moved so that the part of the socket pin 10 that was still exposed until then is housed. The slide end position is preferably defined by a stop, the system on a vehicle body part is shown. A stop on the housing 120 of the plug connection is also possible.

The residual spring preload and the length ratios of the housing 120 and slide 110 in the axial direction are coordinated with one another in such a way that the plug contact system 100 is stress-relieved in the secondary-locked end position.

Reference number

10 contact pin, plug contact pin, socket pin, contact pin, ground pin

11 cone, locking geometry

11 'conical surface, locking surface

12 bevel, support geometry

20 Contact socket, lamellar socket, socket contact

21 Space for plug contact pin

100 plug connection, plug contact system, contact system

101 spring

110 slider

111 support hooks

112 paragraph

120 socket housings, connector housings, housings

121 locking hook

121 'hook slope

122 head start

123 inner sleeve

130 cover, socket housing cover

Claims

Expectations

1. Plug connection (100) for the transmission of electrical energy through detachable contacting, having at least one plug contact pin (10) and at least one contact socket (20), the at least one contact socket (20) being accommodated in a connector housing (120) and the connector housing (120) ) interacts with a slide (110) movable relative to it, so that the plug-in connection partners (10, 20) are housed in the plugged-in and secondary-locked contacting position, characterized in that at least one latching and support geometry (11, 12) is integrated into the plug-in contact pin (10) and cooperates with the connector housing (120) so that the contacting partners (10, 20) are separated from one another when their relative position to one another is outside the secondary locking position.

2. Plug connection (100) for transmitting electrical energy according to claim 1, characterized in that the interaction of the at least one support geometry (11, 12) with the connector housing (120) takes place by at least one latching hook (121).

3. Plug connection (100) for transmitting electrical energy according to claim 2, characterized in that the at least one latching hook (121) is part of the connector housing (120).

4. Plug connection (100) for transmitting electrical energy according to claim 2, characterized in that the at least one latching hook (121) with the at least one support geometry, designed as a cone (11), realizes a releasable, at least non-positive locking, secondary locking.

5. Plug connection (100) for transmitting electrical energy according to claim 1, characterized in that the at least one locking and support geometry (11, 12) interacts with at least one support hook (111) of the slide (110) so that the slide (110) is at least partially pushed into the connector housing (120) during the insertion movement of the at least one plug contact pin (10) into the contact socket (20).

Plug connection (100) for the transmission of electrical energy according to claim 5, characterized in that the at least one support hook (111) is deflected by at least one inner sleeve (123) in the secondary locking position of the contacting partners (10, 20) so that the slide (110) the connector housing (120) is movable in the direction of the housing position.

7. Plug connection (100) for transmitting electrical energy according to claim 6, characterized in that the movement of the slide (110) from the connector housing (120) by a stop formed from at least one shoulder (112) and at least one projection (122) , is limited.

8. Plug connection (100) for transmitting electrical energy according to claim 6, characterized in that the force for moving the slide (110) is a spring force.

9. Plug connection (100) for transmitting electrical energy according to claim 1, characterized in that the force for separating the contacting partners (10, 20) is a spring force.

10. Plug connection (100) for transmitting electrical energy according to claim 8 or 9, characterized in that the spring force is brought about by a spring (101) which is a compression or helical spring.

11. Plug connection (100) for transmitting electrical energy according to claim 10, characterized in that the spring (101) is arranged at least partially in the housing (120) and / or in the slide (110) of the plug connection (100).

12. Plug connection (100) for the transmission of electrical energy according to claim 1, characterized in that the plug contact pin (10) is a ground bolt, fixed by welding on a vehicle body.

13. Plug connection (100) for the transmission of electrical energy according to claim 1, characterized in that the socket housing (120) has a socket housing cover (130) with contacting means for making electrical contact with the contact socket (20).

14. Plug connection (100) for transmitting electrical energy according to claim 1, characterized in that the contact socket (20) is a lamellar contact socket.

15. Plug connection (100) for transmitting electrical energy according to claim 1, characterized in that the secondary-locked contacting position of the plug connection partners (10, 20) is an end position of the plug connection (100) at the end of the plugging movement.