Connecting pin for a connector, as well as corresponding connector and connector arrangement

Abstract

The invention relates to a connecting pin for a connector (1) for making an electrical connection between a first electrical conductor (2) and a second electrical conductor (3), wherein the connecting pin (4) has an expanding sleeve (6) designed for arrangement in a plug receptacle (5) of the connector (1) which can be connected to the first conductor (2) and has deflectable expanding arms (7) in which a clamping nut (9) and a clamping screw (11) engaging the clamping nut (9) are provided.The invention provides that the clamping nut (9) is arranged in a clamping nut receptacle (8) bounded by the spreading arms (7) so as to be axially displaceable with respect to a longitudinal center axis (10) of the spreading sleeve (6) and to be positively locked in the circumferential direction, so that the spreading arms (7) can be deflected radially outwards by axial displacement of the clamping nut (9), and that the spreading sleeve (6) has a connecting collar (13) adjoining the spreading arms (7), which has a contact surface (14) for the second conductor (3) on its side facing a head (12) of the clamping screw (11). The invention further relates to a connector and a connector assembly.

Description

[0001] The invention relates to a connecting pin for a connector for establishing an electrical connection between a first electrical conductor and a second electrical conductor, wherein the connecting pin has an expanding sleeve with deflectable expanding arms designed for arrangement in a plug receptacle of the connector which can be connected to the first conductor, in which a clamping nut and a clamping screw engaging in the clamping nut are provided. The invention further relates to a connector and a connector assembly.

[0002] For example, German patent application DE 2 349 008 A1 is known from the prior art. This describes a power distribution connection that connects a first electrical connection to a second electrical connection in such a way that high currents can be transmitted and in which an alignable wall opening of uniform shape is provided for both connections. It is provided that a sleeve can be inserted into the two wall openings, that a device for the simultaneous expansion of separate sections of the side walls of the sleeve is provided so that both wall openings come into pressure contact with the sections, and that a conductive path exists between the sections to complete the connection between the first and second conductors.

[0003] The object of the invention is to propose a connecting pin for a connector which has advantages over the prior art, in particular enabling tolerance compensation between the first electrical conductor and the second electrical conductor.

[0004] This is achieved according to the invention with a connecting pin for a connector with the features of claim 1. It is provided that the clamping nut is arranged in a clamping nut receptacle bounded by the spreading arms, displaceable in the axial direction with respect to a longitudinal center axis of the spreading sleeve, and positively locked in the circumferential direction, so that the spreading arms can be deflected outwards in the radial direction by axial displacement of the clamping nut, and that the spreading sleeve has a connecting collar adjoining the spreading arms, which has a contact surface for the second conductor on its side facing a head of the clamping screw.

[0005] Advantageous embodiments with expedient further developments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments described in the description are not limiting; rather, any variations of the features disclosed in the description, the claims, and the figures are possible.

[0006] The connector serves to establish an electrical connection between two electrical conductors, namely the first and the second. Each of these conductors is electrically connected, or connectable, to a first and a second electrical component. The two conductors are preferably designed to transmit high currents, such as those found in an electrically powered vehicle. The two electrical components are, for example, parts of an electric drive system, in particular a traction battery, an inverter, and / or an electric motor. The first and / or the second conductor are preferably flat conductors made of an electrically conductive material, in particular copper or a copper alloy.

[0007] To establish the electrical connection, the connector has a receptacle, which is associated with the first conductor, and a connecting pin, which is associated with the second conductor. The receptacle is thus electrically connected to, or can be connected to, the first conductor, while the connecting pin is electrically connected to, or can be connected to, the second conductor. The electrical connection between the two conductors is made by the receptacle and the connecting pin.

[0008] The connector associated with the first conductor is preferably cylindrical, in particular circular, and is made of an electrically conductive material; in particular, it is manufactured as a single piece with the first conductor. For example, the connector is a socket or sleeve that is connected to the first conductor by welding or soldering. Alternatively, the connector is formed integrally with the first conductor or is formed at least partially by the first conductor itself.

[0009] The connecting pin associated with the second conductor has an expanding sleeve that is designed for placement in the plug receptacle and is connected to, or connectable to, the second conductor. The expanding sleeve is also made of an electrically conductive material. In particular, the plug receptacle and the expanding sleeve are made of the same electrically conductive material, for example, copper or an alloy containing copper. It is especially preferred that the plug receptacle, the expanding sleeve, and the two electrical conductors are all made of the same material and thus of the same electrically conductive material.

[0010] The expanding sleeve has several deflectable expanding arms that can be deflected outwards in a radial direction with respect to a longitudinal center axis of the expanding sleeve. Preferably, the expanding arms are formed by slots that are at least partially longitudinally incorporated into the expanding sleeve, such that a gap is formed between two adjacent expanding arms when viewed circumferentially. The expanding sleeve has at least two expanding arms, resulting in two corresponding gaps. Particularly preferably, the expanding sleeve has exactly three or exactly four expanding arms, resulting in exactly three or exactly four gaps.

[0011] The expanding sleeve also features a connecting collar that joins the expanding arms. The expanding arms are thus connected to each other by this connecting collar. Preferably, the expanding arms are formed in one piece with the connecting collar and made of the same material, so that the expanding arms can be deflected outwards by elastic deformation.

[0012] By deflecting the spreading arms outwards, the gaps in the circumferential direction increase, causing the expanding sleeve to spread, at least partially. The deflection of the spreading arms thus refers to the radial outward expansion of the expanding sleeve. When the expanding sleeve is positioned in the connector receptacle, the spreading arms, by deflecting outwards, come into contact with the inner circumferential surface of the connector receptacle, thereby establishing the electrical connection between the connector receptacle and the expanding sleeve. Simultaneously, the spreading arms are resiliently supported against the inner circumferential surface of the connector receptacle, creating a resilient mechanical connection between the connector receptacle and the connecting pin.

[0013] The connecting pin also includes the clamping nut and the clamping screw that engages with it. The clamping screw engaging with the clamping nut means that an external thread on the clamping screw meshes with an internal thread on the clamping nut. The clamping nut is located in the clamping nut receptacle, which is defined by the spreading arms. This means that the clamping nut is encompassed by the spreading arms in the axial direction with respect to the longitudinal center axis, and in particular, completely enclosed in the axial direction. The spreading arms thus define the clamping nut receptacle in the radial direction to the outside.

[0014] The clamping nut is axially displaceable within the clamping nut receptacle with respect to the longitudinal center axis of the expanding sleeve and is positively locked in the circumferential direction. In other words, the clamping nut is held rotationally fixed in the clamping nut receptacle. The clamping screw is arranged coaxially with the expanding sleeve and extends through the connecting collar on the side of the expanding sleeve facing away from the expanding arms and the clamping nut. The head of the clamping screw is thus located on the side of the expanding sleeve facing away from the expanding arms and the clamping nut.

[0015] The spreading arms are deflected by rotating the clamping screw in a first direction, whereby the clamping nut presses against the spreading arms and deflects them outwards. When the expanding sleeve is positioned in the connector receptacle, the clamping nut presses the spreading arms against the inner circumferential surface of the connector receptacle, so that the expanding sleeve is clamped to the connector receptacle and held securely within it. Similarly, the connector clamp can be released by rotating the clamping screw in a second direction opposite to the first.

[0016] The contact surface for the second conductor is also formed on the connecting collar. This contact surface is located on the side of the expanding sleeve facing away from the expanding arms and the clamping nut, and is oriented towards the head of the clamping screw. The rotation of the clamping screw in the first direction thus forces the head of the clamping screw against the contact surface. The second conductor is positioned, at least partially, between the head and the contact surface, so that the head of the clamping screw forces the second conductor against the contact surface. For example, the second conductor, which is designed as a flat conductor, has a through-hole for the clamping screw, allowing the clamping screw to pass through the second conductor.

[0017] The clamping screw and nut thus force the expanding arms radially outwards against the inner circumferential surface of the connector receptacle connected to the first conductor, and simultaneously force the second conductor against the contact surface of the terminal collar. To establish the electrical connection, the second conductor is first connected to the expanding sleeve using the clamping screw and the clamping nut located within the expanding sleeve. The expanding sleeve is then inserted into the connector receptacle so that at least the portion of the clamping nut recess defined by the expanding arms is engaged within the connector receptacle.

[0018] Finally, the rotation of the clamping screw in the first direction deflects the spreading arms radially outwards and simultaneously forces the head of the clamping screw towards the contact surface of the terminal collar. This brings the spreading arms into contact with the inner circumferential surface of the connector, providing spring support. Simultaneously, the head of the clamping screw presses the second conductor against the contact surface. Thus, both the expanding sleeve in the connector and the second conductor on the terminal collar are secured. The connection can therefore be released non-destructively by rotating the clamping screw in the second direction.

[0019] The connecting pin and the corresponding connector according to the invention enable particularly flexible tolerance compensation between the first and second conductors. Since the spreading arms are resiliently supported against the inner circumferential surface of the connector receptacle, angular compensation between the longitudinal center axis of the spreading sleeve and the connector receptacle is particularly possible. This is especially advantageous when the two electrical components are rigidly connected to each other and / or to their respective conductors, thus requiring mechanical tolerance compensation between the two electrical conductors.

[0020] A further development of the invention provides that the expanding arms connect to the connecting collar in a neck region of the expanding sleeve located axially between the clamping nut receptacle and the connecting collar, wherein the smallest inner diameter of the expanding sleeve in the neck region is smaller than the largest outer diameter of the clamping nut. In the neck region, the expanding sleeve is at least partially cylindrical. The neck region connects the clamping nut receptacle to the connecting collar, wherein the inner diameter of the expanding sleeve in the neck region is smaller than the inner diameter of the clamping nut receptacle.

[0021] The expanding sleeve has a constriction in its neck area, preventing the clamping nut, due to its larger outer diameter, from entering the neck of the expanding sleeve. Instead, the clamping screw presses the clamping nut against the expanding arms extending from the neck area, deflecting them radially outwards. This increases the outer diameter of the expanding sleeve at the clamping nut receptacle, causing the expanding arms to bear resiliently against the inner circumferential surface of the connector receptacle. This improves the mechanical connection provided by the connector.

[0022] A further development of the invention provides that the spreading arms have a circular cylindrical section extending axially in overlap with the clamping nut receptacle, to which a curved section transitioning into the neck region adjoins. In this respect, the spreading sleeve is circular cylindrical at least partially in the neck region and at the clamping nut receptacle. Here, the outer diameter of the spreading sleeve in the neck region is smaller than the outer diameter of the spreading sleeve in the circular cylindrical section overlapping the clamping nut receptacle.

[0023] The neck area and the circular cylindrical area are connected by the curved section. For example, the spreading arms are continuously curved within the curved section. Particularly preferably, the circular cylindrical area and the neck area are connected via a conically shaped section, to which a curved section adjoins on both sides. In this configuration, at least part of the inner surface of the spreading arms is conically shaped, providing a conical contact surface for the clamping nut. This ensures a continuous contact area between the clamping nut and the spreading arms.

[0024] A further development of the invention provides that a radial projection extending outwards in a radial direction is formed in the circular cylindrical area and / or in the curved area of ​​the spreading arms. The radial projection is understood to mean that the wall thickness of the spreading arms is not constant in the axial direction, but rather that the wall thickness is increased, at least in certain areas, to form the radial projection.

[0025] The radial projection extends outwards in a radial direction, thus increasing the outer diameter of the expansion sleeve, at least in some areas. Specifically, the outer diameter of the expansion sleeve at the radial projection is larger than the outer diameter of the expansion sleeve in the circular cylindrical section. As a result, the expansion arms with the radial projection rest against the inner circumferential surface of the socket.

[0026] The radial projection is particularly preferred in the curved section of the spreading arms and adjoins the circular cylindrical section. The spreading arms thus rest against the inner circumferential surface of the connector with the radial projection formed in the curved section. This makes the connection between the spreading sleeve and the connector less elastic compared to a design where the spreading arms rest against the inner circumferential surface of the connector in the circular cylindrical section; however, tolerance compensation is still provided.

[0027] A further development of the invention provides that the clamping nut has a clamping surface that is at least partially conical on its side facing the head of the clamping screw. The clamping nut is preferably at least partially circularly cylindrical. This means that an outer circumferential surface of the clamping nut has a circularly cylindrical area.

[0028] The clamping surface, which is at least partially conical, adjoins the circular cylindrical section on at least one side. The clamping surface faces the head of the clamping screw and thus the neck of the expanding sleeve. The expanding arms rest flat against the clamping surface with their inner surfaces, particularly in the curved section of the expanding arms. Preferably, a correspondingly shaped clamping surface adjoins the circular cylindrical section on both sides, so that the clamping nut is symmetrical with respect to its longitudinal center axis. This enables a particularly reliable mechanical connection.

[0029] A further development of the invention provides that the clamping nut has at least one radially outwardly projecting positive locking projection which engages, at least partially, in a gap located between two adjacent spreading arms. These gaps have already been mentioned above.

[0030] The positive locking projection serves to positively lock the clamping nut in the circumferential direction. For this purpose, the positive locking projection engages, at least partially, in the gap between two adjacent expanding arms. In particular, the positive locking projection is formed on the clamping surface of the clamping nut. Preferably, several positive locking projections are provided, so that one projection engages in each gap between two adjacent expanding arms. This enables particularly reliable clamping of the clamping nut in the circumferential direction.

[0031] A further development of the invention provides that the contact surface for the second conductor is at least partially concave, with a convex contact surface for the second conductor being formed on the head of the clamping screw and / or on a washer located between the head of the clamping screw and the contact surface. Preferably, the connecting collar projects radially outwards on the side of the expanding sleeve facing the head of the clamping screw. The connecting collar forms the contact surface for the second conductor.

[0032] The contact surface is concave, at least in some areas. In addition to the contact surface, there is a counter-contact surface, which is convex, at least in some areas. Preferably, the contact surface and the counter-contact surface are concentric with each other. The counter-contact surface is formed on the head of the clamping screw, in particular on the underside of the head facing the contact surface. Alternatively, a washer is provided between the contact surface and the head of the clamping screw, with the counter-contact surface being formed on the washer.

[0033] The second conductor is arranged, at least partially, between the contact surface and the opposing contact surface. Particularly preferably, the second conductor is concave at least partially on a first side facing the contact surface and convex at least partially on a second side facing the opposing contact surface. The second conductor is thus concentric with the contact surface at least partially on its first side and with the opposing contact surface at least partially on its second side. This allows for angular compensation between the second conductor and the expanding sleeve.

[0034] A further development of the invention provides that a positive locking element is formed on the connection collar to secure the second conductor to the connection collar in a rotationally fixed manner. Preferably, the positive locking element projects axially beyond the connection collar with respect to the longitudinal center axis and engages the second conductor at its edge. The positive locking element facilitates assembly of the connector.

[0035] The invention further relates to a connector for producing an electrical connection between a first electrical conductor and a second electrical conductor, with a connecting pin, in particular a connecting pin according to the embodiments within the scope of this description, and a plug receptacle receiving the connecting pin and connectable to the first conductor, wherein the connecting pin has an expanding sleeve designed for arrangement in the plug receptacle with deflectable expanding arms, in which a clamping nut and a clamping screw engaging in the clamping nut are provided.It is provided that the clamping nut is arranged in a clamping nut receptacle bounded by the spreading arms, in a manner displaceable in the axial direction with respect to a longitudinal center axis of the spreading sleeve, and is positively locked in the circumferential direction, so that the spreading arms can be deflected outwards in the radial direction by axial displacement of the clamping nut, and that the spreading sleeve has a connecting collar adjoining the spreading arms which has a contact surface for the second conductor on its side facing a head of the clamping screw.

[0036] The invention further relates to a connector arrangement, comprising a connector, in particular a connector according to the embodiments within the scope of this description, comprising a first electrical conductor and a second electrical conductor, wherein the connector has a connecting pin and a plug receptacle receiving the connecting pin and connected to the first conductor, wherein the connecting pin has an expanding sleeve designed for arrangement in the plug receptacle with deflectable expanding arms, in which a clamping nut and a clamping screw engaging in the clamping nut are provided.It is provided that the clamping nut is arranged in a clamping nut receptacle bounded by the spreading arms in a axially displaceable direction with respect to a longitudinal center axis of the spreading sleeve and is positively locked in the circumferential direction so that the spreading arms can be deflected outwards in a radial direction by axial displacement of the clamping nut, and that the spreading sleeve has a connecting collar adjoining the spreading arms, which has a contact surface on its side facing a head of the clamping screw, against which the second conductor is pressed by the head of the clamping screw.

[0037] The advantages of this connector design and arrangement have already been mentioned. Both the connecting pin and the connector itself, as well as the connector arrangement, can be further developed as described in this document, and reference is made to these details.

[0038] The features and combinations of features described in the description, in particular those described in the following figure description and / or shown in the figures, can be combined not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention. Thus, embodiments that are not explicitly shown or explained in the description and / or the figures, but which result from or can be derived from the explained embodiments through combinations of features, are also to be considered as encompassed by the invention.

[0039] The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing, without limiting the invention. The drawing shows... Fig. 1 A schematic representation of a connector arrangement for making an electrical connection between a first conductor and a second conductor, which Fig. 2 a schematic exploded view of the connector assembly, and the Fig. 3 A schematic detail view of an alternative embodiment of the connector arrangement.

[0040] The Fig. Figure 1 shows a connector arrangement with a connector 1 for establishing an electrical connection between a first electrical conductor 2 and a second electrical conductor 3. The two electrical conductors 2 and 3 are each designed as a flat conductor.

[0041] The connector 1 has a connecting pin 4 and a receptacle 5 connected to the first conductor 2 for receiving the connecting pin 4. The receptacle 5 is welded or soldered to the first conductor 2.

[0042] The connecting pin 4 has an expanding sleeve 6 designed for arrangement in the plug receptacle 5, with deflectable expanding arms 7. A clamping nut 9 is arranged in a clamping nut receptacle 8, which is bounded by the expanding arms 7, and is axially displaceable with respect to a longitudinal center axis 10 and is positively locked in the circumferential direction.

[0043] A clamping screw 11 engages in the clamping nut 9. On its side facing the head 12 of the clamping screw 11, the expanding sleeve 6 has a connecting collar 13 that projects radially outwards. A concave contact surface 14 for the second conductor 3 is formed on the connecting collar 13, which is concentric with a convex contact surface 15 formed on the head 12 of the clamping screw. Alternatively, a washer (not shown) is provided, which is arranged between the head 12 and the second conductor 3 and has the convex contact surface 15 on its side facing the second conductor 3.

[0044] The clamping screw 11 passes through a through-opening 16 formed in the second conductor 3 and presses the second conductor 3 against the contact surface 14. At the same time, the clamping screw 11 presses the clamping nut 9 towards a neck region 17 of the expanding sleeve 6 located between the clamping nut receptacle 8 and the connecting collar 13. In the neck region 17, the smallest inner diameter of the clamping sleeve 6 is smaller than the largest outer diameter of the clamping nut 9.

[0045] The clamping nut 9 has a clamping surface 18 that is at least partially conical, against which the spreading arms 7 bear. The spreading arms 7 have a circular cylindrical section 19 that overlaps the clamping nut receptacle 8 in the axial direction, to which a curved section 20 adjoins, transitioning into the neck section 17. The clamping screw 11 presses the clamping nut 9 with its clamping surface 18 against the curved section 20 of the spreading arms 7, which pushes them radially outwards against the socket 5. This causes the spreading arms 7 to bear resiliently against the socket 5.

[0046] This allows for tolerance compensation between the expanding sleeve 6 and the plug receptacle 5 both in the axial direction and angular compensation in the radial direction with respect to the longitudinal center axis 10. Furthermore, the contact surface 14 formed on the connecting collar 13 enables tolerance compensation between the expanding sleeve 6 and the second conductor 3. Overall, this allows for particularly flexible tolerance compensation between the two conductors 2 and 3.

[0047] The Fig. Figure 2 shows an exploded view of the connector 1. This illustration shows that the clamping nut 9 is symmetrical with respect to the longitudinal center axis 10 and has several positive-locking projections 21 that engage radially between two adjacent expansion arms 7 to positively lock the clamping nut 9 circumferentially. In the illustrated embodiment, the expansion sleeve 6 has three expansion arms 7 and, correspondingly, three positive-locking projections 21 on each clamping surface 18. Alternatively, in an embodiment not shown, four expansion arms 7 and, correspondingly, four positive-locking projections 21 are provided.

[0048] A positive locking element 22 is formed on the connecting collar 13, which projects axially beyond the connecting collar 13. The positive locking element 22 engages the second conductor 3 at its edge to fix it rotationally to the connecting collar 13.

[0049] The Fig. Figure 3 shows a detailed view of an alternative embodiment of the connector arrangement 1. The following only points out the differences compared to the embodiment described above.

[0050] In the curved section 20 of the spreading arms 7, a radial projection 23 is formed, extending outwards in a radial direction. The outer diameter of the spreading sleeve 6 at the radial projection 23 is larger than the outer diameter in the circular cylindrical section 19, so that the spreading sleeve 6 with the radial projection 23 abuts the plug receptacle 5. The radial projection 23 reduces the elasticity of the spring connection between the spreading sleeve 6 and the plug receptacle 5. REFERENCE MARK LIST: 1 connector 2 first conductor 3 second ladders 4 connecting pins 5 Plug socket 6 expansion sleeve 7 Spreader arm 8 Clamping nut holder 9 clamping nut 10 Longitudinal center axis 11 Tensioning screw 12 heads 13 Connecting collars 14 Contact area 15 Contact surface 16 Passage opening 17 Neck area 18 clamping surface 19 circular cylindrical area 20 curved area 21 Form-fit projection 22 Positive locking element 23 radial lead QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 2 349 008 A1

[0002]

Claims

[1] Connecting pin for a connector (1) for making an electrical connection between a first electrical conductor (2) and a second electrical conductor (3), wherein the connecting pin (4) has an expanding sleeve (6) designed for arrangement in a plug receptacle (5) of the connector (1) which can be connected to the first conductor (2) and has deflectable expanding arms (7) in which a clamping nut (9) and a clamping screw (11) engaging in the clamping nut (9) are provided, characterized by, that the clamping nut (9) is arranged in a clamping nut receptacle (8) bounded by the spreading arms (7) in an axial direction with respect to a longitudinal center axis (10) of the spreading sleeve (6) and is positively locked in the circumferential direction, so that the spreading arms (7) can be deflected outwards in a radial direction by axial displacement of the clamping nut (9), and that the spreading sleeve (6) has a connecting collar (13) adjoining the spreading arms (7), which has a contact surface (14) for the second conductor (3) on its side facing a head (12) of the clamping screw (11). [2] Connecting pin according to claim 1, characterized by, that the spreading arms (7) connect to the connecting collar (13) in a neck area (17) of the spreading sleeve (6) located in an axial direction between the clamping nut receptacle (8) and the connecting collar (13), wherein a smallest inner diameter of the clamping sleeve (6) in the neck area (17) is smaller than a largest outer diameter of the clamping nut (9). [3] Connecting pin according to any one of the preceding claims, characterized by , that the spreading arms (7) have a circular cylindrical area (19) in axial direction overlapping with the clamping nut receptacle (8), to which a curved area (20) transitioning into the neck area (17) is connected. [4] Connecting pin according to any one of the preceding claims, characterized by , that in the circular cylindrical area (19) and / or in the curved area (20) of the spreading arms (7) a radial projection (23) projecting outwards in a radial direction is formed. [5] Connecting pin according to any one of the preceding claims, characterized by , that the clamping nut (9) has a clamping surface (18) that is at least partially conical on its side facing the head (12) of the clamping screw (11). [6] Connecting pin according to any one of the preceding claims, characterized by , that the clamping nut (9) has at least one radially outwardly projecting positive locking projection (21) which engages at least partially in a gap between two adjacent spreading arms (7). [7] Connecting pin according to any one of the preceding claims, characterized by, that the contact surface (14) for the second conductor (3) is at least partially concave, wherein a convexly shaped contact counter surface (15) for the second conductor (3) is formed on the head (12) of the clamping screw (11) and / or on a washer located between the head (12) of the clamping screw (11) and the contact surface (14). [8] Connecting pin according to any one of the preceding claims, characterized by , that a positive locking element (22) is formed on the connecting collar (13) in order to fix the second conductor (3) to the connecting collar (13) in a rotationally fixed manner. [9] Connector (1) for making an electrical connection between a first electrical conductor (2) and a second electrical conductor (3), comprising a connecting pin (4), in particular a connecting pin according to one or more of the preceding claims, and a plug receptacle (5) receiving the connecting pin (4) and connectable to the first conductor (2), wherein the connecting pin (4) has an expanding sleeve (6) designed for arrangement in the plug receptacle (5) with deflectable expanding arms (7) in which a clamping nut (9) and a clamping screw (11) engaging in the clamping nut (9) are provided, characterized by, that the clamping nut (9) is arranged in a clamping nut receptacle (8) bounded by the spreading arms (7) in an axially displaceable direction with respect to a longitudinal center axis (10) of the spreading sleeve (6) and is positively locked in the circumferential direction, so that the spreading arms (7) can be deflected outwards in a radial direction by axial displacement of the clamping nut (9), and that the spreading sleeve (6) has a connecting collar (13) adjoining the spreading arms (7), which has a contact surface (14) for the second conductor (3) on its side facing a head (12) of the clamping screw (11). [10] Connector arrangement, comprising a connector (1), in particular a connector (1) according to claim 9, comprising a first electrical conductor (2) and a second electrical conductor (3), wherein the connector (1) has a connecting pin (4) and a plug receptacle (5) receiving the connecting pin (4) and connected to the first conductor (2), wherein the connecting pin (4) has an expanding sleeve (6) designed for arrangement in the plug receptacle (5) with deflectable expanding arms (7) in which a clamping nut (9) and a clamping screw (11) engaging in the clamping nut (9) are provided, characterized by, that the clamping nut (9) is arranged in a clamping nut receptacle (8) bounded by the spreading arms (7) in an axially displaceable direction with respect to a longitudinal central axis (10) and is positively locked in the circumferential direction, so that the spreading arms (7) can be deflected outwards in a radial direction by axial displacement of the clamping nut (9), and that the expanding sleeve (6) has a connecting collar (13) adjoining the spreading arms (7), which has a contact surface (14) on its side facing a head (12) of the clamping screw (11), against which the second conductor (3) is pressed by the head (12) of the clamping screw (11).

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