CABLE GLAND, USE OF A CABLE GLAND AND CONTACT ELEMENT

Description

[0001] The invention relates to a cable gland and its use. Cable glands for ensuring electromagnetic compatibility are generally known from the prior art. DE 10 2008 018 205 B4 discloses a device for the electromagnetically compatible arrangement of a cable with a contacting means consisting of a coiled spring element, wherein coils of the spring element have a substantially straight holding section which, in the intended assembly position, is aligned parallel to the casing of the through-opening, and wherein a support region is formed by substantially straight coil sections adjoining the straight holding sections at an angle, wherein the coils of the spring element have the shape of an isosceles triangle in cross section.

[0002] CN 204651864 U discloses a cable gland with a contact element with identically shaped windings, each of which is trapezoidal in shape. US 2016 / 0076568 A1 discloses a contact element for a miniature switch.

[0003] Cable glands known from the prior art have the disadvantage that they easily tilt or jam when installing a long-formed part into a cable gland with a contact element. Particularly with small cable diameters relative to a chamber of the cable gland in which the contact element is located, this leads to twisting of the cable glands known from the prior art, which either complicates installation or prevents optimal electrical contact. Furthermore, the installation of flexible cables into the cable gland is not convenient for the reasons stated above.

[0004] The object of the invention is therefore to improve a cable gland. In particular, the object of the invention is to provide a cable gland that is easy to install. In particular, the object of the invention is to provide a cable gland that enables secure electrical contact. In particular, the object of the invention is to provide a cable gland that makes it easy to install a flexible, long-form part.

[0005] The object is achieved according to the invention by means of a cable gland comprising a component and at least one contact element, wherein the at least one contact element comprises a plurality of essentially geometrically identically shaped turns, wherein each turn comprises a holding section for electrically contacting the component surrounding the contact element, at least a first and a second support section for electrically contacting a shield of an elongated part and a first and a second extension section, wherein the holding section, the first extension section and the two support sections are arranged one after the other and the first support section and the second support section are adjacent to one another.

[0006] Furthermore, the object is achieved according to the invention by means of a cable gland described above for the electrical contacting of at least one shield of at least one long molded part.

[0007] The contact element comprises a plurality of essentially geometrically identically shaped windings. Each winding comprises a holding section for electrically contacting a component surrounding the contact element, at least one support section for electrically contacting a shield of an elongated part, and a first and a second extension section. The holding section, the first extension section, and the at least one support section are arranged downstream of one another. Preferably, the second extension section is arranged downstream of the at least one support section.

[0008] For the purposes of the invention, "geometrically identical" means that the shape of the turns, particularly in a view of a turn in the circumferential direction of the contact element, is essentially congruent. In particular, the projections of the turns are essentially congruent on a plane on which a radius is arranged, starting from a central longitudinal axis of the contact element, and which at least intersects the respective turn, preferably at least intersects a holding section of the turn.

[0009] The term "essentially" indicates a tolerance range that is acceptable to a person skilled in the art from an economic and technical point of view, so that the corresponding feature can still be recognized or realized as such.

[0010] The windings within the meaning of the present application are defined by a starting point and an end point. The through opening is preferably defined by the windings, preferably by the support sections of the windings, more preferably by radial sections that connect the first and second support sections of each winding. In one embodiment, the starting point and end point are at the same distance from the central longitudinal axis of the contact element. Alternatively, the starting point and end point can be at different distances from the central longitudinal axis of the contact element. The individual windings extend in a winding manner between the starting point and the end point. The starting point and / or the end point are preferably arranged in a transition, preferably before or after a radial section, from the second extension section of a winding to a holding section of the next winding.For the purposes of the present invention, the holding section, extension section, and / or support section are considered to be undivided by the starting point and / or end point. For example, if the contact element is cut open in the plane of the starting point and the end point at a transition between the second extension sections and the holding sections along a circumference of the contact element, the contact element breaks down into the individual windings.

[0011] In one embodiment, it is provided that the first and / or the second extension section extend in a straight line. In a further embodiment, it is provided that the first and / or the second extension section extend in an arcuate shape. Preferably, the first and / or the second extension section curves in the direction of the central longitudinal axis. Further preferably, the first and / or the second extension sections curve such that an envelope of the contact element has a concave surface in the region of the first and / or second extension sections. Further preferably, the first and / or the second extension sections curve such that an envelope of the contact element has a convex surface in the region of the first and / or second extension sections.In a further embodiment, it is provided that the first and / or the second extension section extends straight or curved in a plane whose normal is the central longitudinal axis.

[0012] In the sense of the invention, an envelope of the contact element is an imaginary surface that preferably touches each turn of the contact element on the outside.

[0013] In one embodiment, it is provided that in the inserted state the diameter of the through-opening is the same size as in the non-inserted state, in particular when the outer diameter of the non-inserted contact element is smaller than or equal to the inner diameter of the component. Preferably, at least in the installed state, by inserting the elongated molded part, at least the outer diameter of the contact element is widened such that the holding sections electrically contact the inner wall of the component. Further preferably, in the inserted state the diameter of the through-opening is smaller than in the non-inserted state. Further preferably, in the inserted state the diameter of the through-opening is the same as in the non-inserted state.

[0014] In one embodiment, the minimum diameter of the through-hole is a fraction of the installation diameter of the contact spring. Preferably, the minimum diameter of the through-hole is a diameter of the through-hole in the inserted state of the contact element.

[0015] The installation diameter is preferably the outer diameter of the contact element in the installed state. The installation diameter is preferably an inner diameter of the component into which the contact element can be inserted and for which the contact element is intended.

[0016] Preferably, the ratio of through-opening to installation diameter is about 0.1 to about 0.7, more preferably about 0.15 to about 0.5, more preferably about 0.2 to about 0.3.

[0017] In one embodiment, the through-opening has a maximum diameter. The maximum diameter is a diameter of the through-opening in the installed state, i.e., with the elongated molded part inserted. Preferably, the windings are deflected essentially to their maximum extent by the elongated molded part. The maximum diameter is preferably approximately 1.5 times to approximately 1.8 times, preferably approximately 2 times to approximately 5 times, and more preferably approximately 2.5 times to approximately 3 times, the minimum diameter of the through-opening.

[0018] In a configuration in which the windings, in the uninserted state, have an orientation in the direction of the central longitudinal axis in a top view of the contact element that is angled to the radius of the central longitudinal axis, the orientation of the windings can be changed during assembly of the contact element into the component. Preferably, the angle of the orientation, which deviates from the radius of the central longitudinal axis, increases during assembly into the component and / or during the passage of a long molded part, particularly when the contact element is inserted into the component.

[0019] In one embodiment, it is provided that the basic shape of the windings, seen in a view of the respective winding in the circumferential direction, is house-shaped, wherein preferably the at least one support section forms a roof, wherein preferably the first and the second extension section form walls and wherein preferably the holding section forms a foundation or floor.

[0020] Preferably, the contact element is designed to contact at least one shield of a long molded part.

[0021] The elongated part according to the invention comprises at least one elongated, in particular flexible, particularly preferably non-flexible, body selected from a group comprising cables, hoses, and / or pipes. Preferably, at least one elongated part can be passed through the contact element. Further preferably, the at least one elongated part can be passed through the contact element mounted in the component. Preferably, the elongated part has an electromagnetic shield, which is further preferably at least partially stripped in the region in which the contact element rests or in the region of a cable gland.

[0022] The contact element preferably comprises a wire that forms the windings. The wire has a wire diameter. For the purposes of the invention, the wire diameter is understood to be a diameter of the wire transverse to the longitudinal extent of the wire that forms the individual windings. In one embodiment, the wire is metallic, electrically conductive, and preferably resilient. In one embodiment, the wire that forms the individual windings has a substantially circular cross-section. In one embodiment, the wire that forms the individual windings has a cross-section that deviates from a circular shape. In one embodiment, the wire has a quadrangular, preferably a rectangular, more preferably a square cross-section.

[0023] For the purposes of the invention, a cross-section is a section transverse to a longitudinal extension.

[0024] In the present invention, the contact element is described in an uninstalled state unless otherwise stated. If the contact element is inserted into a chamber of a component, for example, a cable gland, the contact element is in an installed state. If an elongated part is arranged in the chamber of a component with the contact element, the contact element is in an installed state.

[0025] The contact element preferably has a through-opening, which is more preferably surrounded by the windings or defined by them. If at least one elongated part is introduced into the contact element, in particular guided through the through-opening, it is advantageously contacted by the windings depending on the diameter of the at least one elongated part or an envelope formed by a plurality of elongated parts. In particular, if the elongated part(s) has(have) an exposed electromagnetic shield in a contact area, an electric current can flow between the shield and the contact element, voltage equalization can take place, and / or in particular the elongated part(s) can be grounded.Preferably, an electrical current can flow between the shield and the contact element, voltage equalization can occur, and / or, in particular, the long-form part(s) can be grounded if the contact element is electrically connected to the component, which is preferably electrically grounded. The secure electrical connection between the long-form part and the component, which is enabled by the contact element, advantageously ensures electromagnetic compatibility.

[0026] The advantage of the proposed contact element is that it is more torsionally rigid than contact elements known from the prior art. Advantageously, when the particularly flexible long-form part is installed or inserted through the through-opening of the contact element, which is inserted into a chamber of a component, the contact element is not tilted and / or twisted in the chamber. This ensures safe and simple installation. Particularly advantageous is the very convenient installation of flexible long-form parts, such as cables, using the proposed contact element. Another advantageous feature is that the extension sections of the individual windings rest on an end face and / or on at least one, for example, radially encircling shoulder of the component.This stabilizes the contact element in the chamber and also provides a larger electrical contact surface through which an electrical current and / or a heat flow can be dissipated. In particular, a radial extension of the at least partially radially encircling shoulder, which secures the spring in the chamber, can preferably be used essentially entirely as an electrical contact surface. In the case of springs with a triangular cross-section, however, only a point-like electrical contact between the spring and the shoulder and / or end face is possible.

[0027] Each turn of the contact element has a holding section. This is preferably designed to be rectilinear. The holding section is preferably designed for electrical contact with a component in whose chamber the contact element can be inserted or is arranged. Further preferably, the holding section can be contacted with an inner wall of the component, for example, the cable gland. The inner wall is preferably understood to be the cylindrical, circumferential wall of the component, which in one embodiment is delimited on the end face by at least one radially circumferential shoulder.

[0028] In one embodiment, the holding section or a projection of the holding section is arranged at an angle or parallel to the central longitudinal axis in a viewing plane on which the central longitudinal axis is arranged. In one embodiment, it is provided that the at least one holding section is linear and, more preferably, has an angle in a range of approximately -50° to approximately +50°, preferably approximately -45° to approximately +45°, more preferably approximately -30° to approximately +30°, to a central longitudinal axis of the contact element passing centrally through the through-opening - preferably in a view radially onto the central longitudinal axis, in which the central longitudinal axis and the holding section are arranged on the viewing plane or the holding section intersects the viewing plane or is also arranged on it.In a further embodiment, it is provided that in a view radially onto the central longitudinal axis, a holding section which, in a projection onto the view plane, is cut approximately centrally by the central longitudinal axis or substantially coincides with it, the angle between the holding section and the central longitudinal axis is approximately -10° to approximately +10°.

[0029] In particular, an envelope can be placed around the contact element. The envelope is an imaginary surface that touches each turn, preferably each section of each turn, of the contact element. The envelope forms a lateral surface in the region of the holding sections. The lateral surface of the envelope of the contact element is preferably substantially conical or cylindrical in shape. The conical shape of the contact element derived from the lateral surface has the advantage that the contact element can be easily inserted into a component, in particular one with a cylindrical interior, or into a chamber of the component.In particular, the angled retaining sections, or those forming a lateral surface of the conical envelope, can bear against the inner wall of the component or chamber, wherein the windings, in a top view of the contact element, are preferably aligned in the direction of the central longitudinal axis at an angle to the radius of the central longitudinal axis. For example, in an inserted and / or installed state, the retaining sections bear against the inner wall of the chamber and are deformed according to the shape of the inner wall. For example, a cylindrical inner wall of the chamber can deform the contact element such that the lateral surface of the envelope of the inserted or installed contact element is cylindrical.

[0030] If, within the scope of the invention, the term "approximately" is used in connection with values ​​or value ranges, this is to be understood as a tolerance range that the person skilled in the art considers customary in this field. In particular, a tolerance range of ±20%, preferably ±10%, more preferably ±5% is provided. To the extent that different value ranges, for example preferred and more preferred value ranges, are specified in the present invention, the lower limits and upper limits of the various value ranges can be combined with one another. The term "essentially" within the scope of the invention indicates a tolerance range that is justifiable for the person skilled in the art from an economic and technical point of view, so that the corresponding feature can still be recognized as such or realized.

[0031] Examples are not to be regarded as exhaustive within the meaning of the invention, but can be supplemented within the scope of general technical knowledge.

[0032] The contact element has at least one support section for electrically contacting a shield of an elongated part. In one embodiment, it is provided that the at least one support section is arranged in an arc shape or in the shape of a circular segment between the first extension section and the second extension section. In a preferred embodiment, it is provided that a first support section and a second support section are provided. The first and second support sections are preferably essentially rectilinear. According to the invention, it is provided that the windings have a first support section and a second support section that adjoin one another. In one embodiment, it is provided that the support sections have an angle of approximately 30° to approximately 130°, preferably approximately 60° to 110°, more preferably approximately 45° to approximately 90°, to one another.

[0033] In one embodiment, it is provided that the first support section and the second support section are approximately the same length.

[0034] In one embodiment, it is provided that the at least one support section, preferably the first and the second support section, each borders on an extension section.

[0035] The contact element has a first extension section and a second extension section, which preferably each extend in a straight line. The first extension section and the second extension section are preferably arranged on parallel planes. The first extension section and the second extension section are preferably arranged on parallel planes in the inserted state. The first extension section and the second extension section are preferably arranged on parallel planes in the installed state. Further preferably, an envelope of the contact element in the region of the first extension section and / or in the region of the second extension section forms a conical surface, preferably in the uninserted, inserted and / or installed state.

[0036] In one embodiment, the first extension section and the second extension section are configured to be substantially the same length. Preferably, the distance between the holding section and the support section of a winding is the length of the extension section.

[0037] Further preferably, a greatest distance between the holding section and the support section, preferably a distance between a radially outermost point of the holding section and a radially innermost point of the support section, defines a radial extension of the contact element.

[0038] Preferably, the ratio of the length of the extension section and the radial extension of the contact element is about 0.1 to about 0.45, preferably about 0.2 to about 0.4, more preferably about 0.3 to about 0.35.

[0039] In one embodiment, it is provided that the ratio of the length of the extension section to the installation diameter of the contact element is approximately 0.5 to approximately 1, preferably approximately 0.25 to approximately 0.46, more preferably approximately 0.3 to approximately 0.44.

[0040] In one embodiment, it is provided that the extension section to the holding section, particularly in the inserted state, comprises an angle of approximately 80° to approximately 100°, preferably approximately 80° to approximately 90°, more preferably approximately 80° to approximately 89°, more preferably approximately 85°. It has surprisingly been found that the fit of the contact element, particularly in a cable gland, is more secure, even when inserting or removing an elongated part, in particular a cable, if the angle between the extension section and the holding section is less than approximately 90°. In particular, the angle between the holding section and the extension section can be selected such that it does not exceed approximately 90° even in the event of production-related tolerance deviations.

[0041] In one embodiment, it is provided that the holding section, the first extension section, the second extension section and / or the at least one first and one second support section are designed to be substantially rectilinear.

[0042] In one embodiment, the holding section borders the first extension section, wherein the first extension section borders at least one support section, and wherein the at least one support section borders the second extension section. Preferably, the second support section borders the first support section. Further preferably, the second extension section borders the holding section of the next turn.

[0043] In one embodiment, it is provided that a radial section is formed between the holding section and the first and second extension sections and / or between the at least one first and one second support section and the first and second extension sections. The radial section is preferably designed to be as small as possible. More preferably, the radial section represents the technically necessary bending radius, which is arranged between the individual sections. In one embodiment, it is provided that the radial section is larger than technically necessary. Within the meaning of the invention, the holding section, the first extension section, the at least one first and one second support section and the second extension section each border on one another, even if a radial section is arranged between them.

[0044] The individual windings of the contact element can be described as house-shaped in a plan view of the windings, preferably in a longitudinal section of the contact element. In the house-shaped windings, the holding section preferably represents a floor, the extension sections the walls and the at least one support section the roof, wherein preferably a first and a second support section form or indicate a gable roof. The winding can preferably be described in a view in the circumferential direction with the Unicode character (U+2302) describe.

[0045] In one embodiment, the contact element is ring-shaped or toroidal. Preferably, the ring-shaped or toroidal spring is self-contained, more preferably formed by connecting or joining the ends to form a ring or torus. More preferably, the contact element comprises a coiled, ring-shaped, closed spring, preferably made of a wire-like material. In one embodiment, the contact element comprises at least one electrically conductive material. Preferably, the contact element comprises at least one material selected from a group comprising steel, spring steel, copper, gold, brass and / or carbon and modifications thereof. Furthermore, an envelope of the contact element is formed substantially like a torus.

[0046] Preferably, the contact element is designed such that it can adapt to a chamber having a cylindrical or non-cylindrical inner wall.

[0047] In one embodiment, it is provided that the windings of the contact element have a radial orientation at least in the inserted state and / or in a non-inserted state. In an embodiment of the contact element in which the holding section is preferably arranged substantially parallel to the central longitudinal axis, the individual windings preferably project two legs each onto a viewing plane in a plan view of the contact element in the direction of the central longitudinal axis. This is particularly the case with a cylindrical shape of the contact element, for example in the inserted state. The viewing plane is in the given case a plane whose normal is the central longitudinal axis of the contact element. Preferably, the two legs projected onto the viewing plane, preferably of the extension section, more preferably at least of the at least one support section and the extension section, are connected to one another at an apex point.The apex is preferably the connection between the first support section and the second support section. The angle bisector of the two legs is the orientation of the windings in the following. If the orientation of the windings coincides with a radius of the contact element on the central longitudinal axis or is angled by approximately ± 5° from the radius on the central longitudinal axis, the windings are essentially radially aligned within the meaning of the present application. In this embodiment, the windings have an essentially radial orientation in an inserted or uninserted state of the contact element. If the angle bisector or the orientation of the windings deviates from the radius of the contact element on the central longitudinal axis by more than approximately ± 5°, preferably by approximately ± 6° to approximately ± 80°, the winding has an orientation that deviates from the radius on the central longitudinal axis, for example in the installed state.

[0048] In a further embodiment, the windings, in an unused state and / or in an inserted state, have an orientation that deviates from the radius to the central longitudinal axis by approximately ±6° to approximately ±30°, preferably approximately ±6° to approximately ±15°, more preferably approximately ±6° to ±10°. Further preferably, all windings deviate from the radius to the central longitudinal axis by approximately the same angle, preferably in the same direction, counterclockwise or clockwise.

[0049] In one embodiment, it is provided that the contact element has a plurality of turns. In one embodiment, it is provided that a nominal number of turns W n of the contact element depends on the radial extent of the contact element E r , on the installation diameter DE and on the wire diameter DD. The nominal number of turns of the contact element can preferably be described by the formula W n = (DE - 2 · E r ) π / DD. The nominal number of turns preferably represents the theoretical, preferably maximum, number of turns for the minimum diameter of the through opening. In one embodiment, the contact element is designed with a number of turns which is in a ratio of approximately 0.33 to approximately 3, preferably approximately 0.4 to approximately 2.5, more preferably approximately 0.5 to approximately 2, to the nominal number of turns.In a further embodiment, the contact element is designed with a number of turns which is in a ratio of approximately 1 to approximately 3, preferably approximately 1 to approximately 2.5, more preferably approximately 1 to approximately 2, to the nominal number of turns. Advantageously, by providing the extension sections, the turns of the contact element can twist or deflect in the uninstalled and inserted state in such a way that more turns can be made than the nominal number of turns specifies. Advantageously, by providing the extension sections, the deflection of the turns is preferably defined in the inserted state in such a way that a predetermined minimum diameter of the through-opening can be formed.

[0050] In an exemplary embodiment, it is provided that the contact element comprises a plurality of essentially identically designed turns. The individual turns comprise, for example, a holding section, a first extension section, a first support section, a second support section and a second extension section. A first radial section is arranged between the holding section and the first extension section. A second radial section is arranged between the first extension section and the first support section. A third radial section is arranged between the first support section and the second support section. A fourth radial section is arranged between the second support section and the second extension section. The radial sections each form, for example, the transition between the adjacent linear sections, which border on one another and are at an angle to one another.

[0051] In an exemplary view plane in the direction of the circumference of the contact element, a winding can be described as house-shaped, wherein the first and second support sections can be described as a roof, at which the house walls from the first and second extension sections border and wherein the holding section forms the floor.

[0052] In a non-inserted state, the windings are, for example, radially aligned, wherein the support sections form a through-opening through which a long shaped part (not shown) can be guided.

[0053] When the contact element is inserted, for example, into a chamber of the cable gland, it is radially compressed. A distance between the support sections or the radial sections between the first and second support sections of adjacent turns is smaller due to the radial compression in the chamber than the distance between the turns in the non-inserted state. In one embodiment, the support sections of the turns touch each other or a gap between them is completely closed. The diameter of the through opening is minimally reduced by the compression, for example. Despite the radial compression, the turns are essentially radially aligned. The radial alignment is determined by the angle bisector of an angle enclosed by the turn or the first and second extension sections.In the exemplary embodiment, in which the turns have a radial orientation, the bisector of the angle between the extension sections and the radius of the contact element essentially coincide. The contact element comprises, for example, twelve turns with an installation diameter DE of approximately 13 mm, a radial extension E r of approximately 4.5 mm, and a wire diameter DD of approximately 1 mm. This corresponds approximately to the nominal number of turns.

[0054] If, for example, an elongated part is arranged in the through-opening of the contact element that is inserted in the cable gland, the contact element is in the installed state. The windings are deformed, for example, by the elongated part in such a way that the orientation or the bisector of the angle spanned by the extension sections is aligned at an angle to the radius of the contact element. The elongated part widens the diameter of the through-opening to the outer diameter of the elongated part (not specifically designated here). Furthermore, for example, the elongated part arranged in the through-opening deforms the windings in such a way that they contact each other at least in the area of ​​the support sections.

[0055] Preferably, a contact element as described above is used for the electrical contacting of components with a shielding function and / or current-carrying function.

[0056] In one embodiment, the contact element is used for installation in a component with a rotationally symmetrical, for example, cylindrical or conical, inner wall. Alternatively, the inner wall can also be toroidal or double-conical, or have another rotationally symmetrical configuration. Preferably, the contact element is used for insertion into the component with a chamber, preferably a cable gland, more preferably as described below.

[0057] In an exemplary embodiment, the contact element is used for insertion into a chamber of a component of a cable gland. For example, a cable is routed through the chamber, the exposed shield of which is contacted by the contact element, electrically connecting the shield to the component. Furthermore, the use of a contact element for contacting components with a shielding function and / or current-carrying function is proposed.

[0058] According to the invention, a cable gland comprising a component and at least one contact element is proposed. The contact element comprises a plurality of essentially geometrically identically shaped turns, each turn comprising a holding section for electrically contacting the component surrounding the contact element, at least one support section for electrically contacting a shield of an elongated part, and a first and a second extension section, each extending in a straight line. The first and the second extension section connect the holding section to the at least one support section. The contact element is preferably designed as described above.

[0059] The cable gland preferably comprises a nipple, for example a double nipple.

[0060] Furthermore, the nipple is advantageously the component that accommodates the contact element. The component preferably comprises a chamber with an inner wall against which the contact element is supported. Further preferably, the holding section is supported against the inner wall of the component. The inner wall of the component is preferably cylindrical. Further preferably, a vertical axis of the component, in particular of the cylindrical inner wall, extends parallel, preferably congruent, to the central longitudinal axis of the installed contact element.

[0061] When the contact element is inserted into the component, the contact element is deformed. In the assembled state, the contact element is inserted into the component in such a way that the holding sections at least partially, preferably completely, rest against the inner wall of the component. In particular, an inner diameter of the component is smaller than a maximum outer diameter of the non-inserted contact element. Preferably, the contact element is at least partially compressed in the radial direction during its assembly into the component. Further preferably, a holding section which, in the non-inserted state, is arranged on a plane in which the central longitudinal axis lies at an angle of approximately -50° to approximately +50° to the central longitudinal axis of the through-opening of the contact element, is aligned substantially parallel to the central longitudinal axis in the assembled state.

[0062] In one embodiment, the cable gland comprises a component with a chamber which is delimited radially to the central longitudinal axis by an inner wall and along the central longitudinal axis by at least one radially at least partially circumferential shoulder. The at least one shoulder can be designed as a discrete reduction in an inner diameter of the component. Furthermore, the at least one shoulder can be designed as a wall. Preferably, the at least one shoulder designed as a wall can either end flush with the component on the outside or on one side, or form a boundary within the component. The at least one at least partially radially circumferential shoulder preferably forms an insertion opening through which the contact element can be inserted into the chamber. The contact element is preferably compressed radially in order to insert it through the insertion opening into the chamber.Further preferably, the contact element relaxes in the chamber in such a way that slipping of the contact element out of the chamber is prevented by the at least one shoulder.

[0063] In one embodiment, the first and / or second extension section at least partially abuts the at least one circumferential shoulder. Preferably, an electrical contact is provided between the first and / or second extension section and the at least one circumferential shoulder.

[0064] In one embodiment, it is provided that the shoulder of the component axially limits or supports the contact element in its movement. In one embodiment, it is provided that the shoulder has a radial extension. Preferably, the radial extension is an extension from an inner wall of the component to a radially inner edge of the shoulder. The radial extension preferably has a ratio of approximately 2.5 to approximately 7, preferably approximately 3 to approximately 5, more preferably approximately 3.5 to approximately 4.5 to the wire diameter of the contact element. In one embodiment, the wire diameter is approximately 0.5 mm to approximately 5 mm, preferably approximately 1 mm to approximately 2 mm.

[0065] In one embodiment, it is provided that at least one holding section, preferably a plurality of holding sections, more preferably all holding sections, of the at least one contact element rests or rests against an inner wall of a component of the cable gland. In one embodiment, the contact element is deformed by the chamber, preferably by the inner wall of the chamber, in such a way that a lateral surface of the envelope of the contact element is adapted to the shape of the inner wall. The holding sections preferably rest against the inner wall in such a way that the envelope assumes the shape of the inner wall in the region of the holding sections. For example, the inner wall can be cylindrical or conical. An inner diameter of the chamber is preferably smaller than an outer diameter of the contact element in the non-inserted state.

[0066] In one embodiment, the windings have a radial orientation when inserted. In another embodiment, the windings, when inserted into a component, in particular with a cylindrical inner wall, are aligned at an angle to the radius with respect to the central longitudinal axis.

[0067] In one embodiment, it is provided that the orientation of the windings in an inserted state deviates from the radius on the central longitudinal axis by approximately ±6° to approximately ±50°, preferably approximately ±6° to approximately ±30°, more preferably approximately ±8° to ±25°. In one embodiment, it is provided that the orientation of the windings in an installed state with the elongated molded part inserted deviates from the radius on the central longitudinal axis by approximately ±10° to approximately ±80°, preferably approximately ±10° to approximately ±75°, more preferably approximately ±20° to ±70°.

[0068] By passing the long-form part through the chamber with the inserted contact element, the bending of the turns, preferably all turns, to the radius is preferably increased compared to the inserted state in such a component.

[0069] In one embodiment, it is provided that the at least one contact element is accommodated in a chamber of a component which has at least one external thread, wherein at least one elongated part can be guided through the component. In one embodiment, it is provided that the chamber of the component accommodates two or a plurality of contact elements. In a further embodiment, it is provided that the component has a plurality of chambers, in each of which at least one contact element can be inserted. In a further embodiment, it is provided that the cable gland has a plurality of components, each for accommodating at least one contact element.

[0070] In one embodiment of the cable gland with at least one elongated part, it is provided that the at least one elongated part is at least partially arranged in a chamber with the at least one contact element, wherein the cable gland and the at least one elongated part form an installed state, wherein in the installed state the at least one support section of each turn of the at least one contact element at least partially rests against a shield of the elongated part and the turns deviate from a radial alignment. The at least one elongated part is guided through the through-opening of the at least one contact element. The turns preferably make electrical contact with the elongated part, in particular with a stripped section of the elongated part.

[0071] Preferably, the windings are aligned at an angle to the radius on the central longitudinal axis by mounting the elongated part in the contact element. Preferably, the windings are contacted and pressed by the elongated part in such a way that they shift in a radial direction relative to the central longitudinal axis. Preferably, the windings are contacted and pressed by the elongated part in such a way that they shift in a radial direction, relative to the central longitudinal axis, away from the central longitudinal axis if the outer diameter of the contact element in the inserted state without the elongated part is smaller than the inner diameter of the component. Preferably, the orientation of the windings is changed when the elongated part is passed through the through-opening of the contact element inserted in the component.For example, if the coils are radially aligned before the long-formed part is inserted, they are shifted or deformed by the insertion of the long-formed part such that they align themselves at an angle to the radius with the central longitudinal axis. For example, if the coils are aligned at an angle from the radius to the central longitudinal axis before the insertion of the long-formed part, they are changed by shifting or deforming the coils when the long-formed part is inserted, so that the angle to the radius increases with the central longitudinal axis.

[0072] In one embodiment, the elongated part has a diameter that is greater than or equal to the diameter of the through-hole of the contact element inserted in the component without the elongated part. Preferably, the elongated part contacts the support section of the windings and / or the radial sections between the first and second support sections.

[0073] An example cable gland comprises a compression nut, a sealing element, a component, and an O-ring. A contact element is arranged in the component, for example. The compression nut can be screwed onto the component, whereby the sealing element is compressed and can form a tight seal around a long molded part. The O-ring can seal the cable gland against a connection geometry in which the cable gland is inserted.

[0074] The contact element is held in a chamber of the component, for example, by a radially circumferential shoulder. The chamber is delimited radially to the central longitudinal axis by an inner wall and along the central longitudinal axis by a radially circumferential shoulder. For example, the second extension section contacts the shoulder. The electrical contact between the shoulder and the second extension section of a contact element can advantageously dissipate currents. The holding section contacts, for example, the inner wall of the chamber. The electrical contact between the holding section and the inner wall of the chamber can also advantageously dissipate currents. The exemplary design of the contact element ensures optimal use of the inner surface of the chamber for current dissipation.

[0075] In another exemplary embodiment, an elongated part, for example a cable, is inserted into the cable gland. The exemplary elongated part has a stripped part in which a shield is exposed. The shield is electrically contacted by the contact element in the chamber. Due to the shape of the spring-like contact element, in particular by the provision of first and second extension sections, the contact element is designed to be torsionally rigid during assembly of the elongated part, preventing tilting of the contact element in the chamber, in particular upon insertion of the flexible elongated part.

[0076] Furthermore, the use of a cable gland described above for electrically contacting at least one shield of at least one long molded part is proposed.

[0077] Further advantageous embodiments will become apparent from the following drawings. However, the developments presented therein are not to be interpreted as limiting; rather, the features described therein can be combined with one another and with the features described above to form further embodiments. Furthermore, it should be noted that the reference numerals used in the description of the figures do not limit the scope of the present invention, but merely refer to the exemplary embodiments shown in the figures. Identical parts or parts with the same function have the same reference numerals below. They show: Fig. 1 a sectional view II according to Fig. 2 by a contact element; Fig. 2 a top view of the contact element Fig. 1 in the non-inserted state; Fig. 3 an isometric view of the contact element from Fig. 1 ; Fig. 4 a top view of the contact element from Fig. 2 in the inserted state; Fig. 5 a top view of the contact element from Fig. 2 in the installed state; Fig. 6 an exploded view of a cable gland with the contact element from Fig. 2 ; Fig. 7 a sectional view of the cable gland from Fig. 6 ; Fig. 8 a sectional view of the cable gland from Fig. 6 with a long form part; Fig. 9 a sectional view of the cable gland from Fig. 7 ; Fig. 10 a sectional view X - X according to Fig. 11 an alternative contact element; Fig. 11 a plan view of the contact element from Fig. 10 in the non-inserted state; Fig. 12 a top view of the contact element from Fig. 11 in the inserted state; Fig. 13 a top view of the contact element from Fig. 11 in the installed state; Fig. 14 an exploded view of an alternative cable gland with the contact element from Fig. 11 ; Fig. 15 a sectional view of the cable gland from Fig. 14 ; Fig. 16 a sectional view of the cable gland from Fig. 14 with a long form part; and Fig. 17 a sectional view XVII - XVII of the cable gland from Fig. 15 .

[0078] Fig. 1 shows a sectional view II according to Fig. 2 by a contact element 10. The contact element 10 comprises twelve essentially identically designed turns 12, of which only one turn 12 is designated for the sake of clarity. The individual turns 12 comprise a holding section 14, a first extension section 18, a first support section 16, a second support section 17 and a second extension section 19. A first radial section, which cannot be seen behind a turn, is arranged between the holding section 14 and the first extension section 18. A second radial section 20.2 is arranged between the first extension section 18 and the first support section 16. A third radial section 20.3 is arranged between the first support section 16 and the second support section 17. A fourth radial section 20.4 is arranged between the second support section 17 and the second extension section 19. The radial sections 20.1 to 20.4 each form the transition between the adjacent linear sections 14, 18, 16, 17, 19, which are adjacent to each other and at an angle to each other.

[0079] In the view plane, it can be seen that a winding 12 can be described as house-shaped, wherein the first and second support sections 16, 17 can be described as a roof, to which house walls from the first and second extension sections 18, 19 border, and wherein the holding section 14 forms a floor.

[0080] Fig. 2 shows a top view of the contact element 10 from Fig. 1 in a non-inserted state. The windings 12 are radially aligned, with the support sections 16 and 17 forming a through-opening 24 through which a long molded part (not shown) can be guided.

[0081] Fig. 3 shows an isometric view of the contact element 10 from Fig. 1 It has twelve identically designed turns 12, 112, not all of which are labeled for the sake of clarity. The isometric view shows that the first extension section 18 borders the holding section 14. The first support section 16 borders the first extension section 18, which in turn borders the second support section 17. The second support section 17 borders the second extension section 19, which in turn borders the holding section 114 of the next turn 112. The holding section 14, the first extension section 18, the first support section 16, the second support section 17, and the second extension section 19 are thus arranged one after the other.

[0082] Fig. 4 shows a top view of the contact element 10 from Fig. 2 in the inserted state. The chamber into which the contact element 10 is inserted is not shown in this view for the sake of clarity. By inserting it into the chamber, the contact element 10 is radially compressed. The diameter 28 of the through-opening 24 is minimally reduced by the compression. The windings 12 are essentially radially aligned despite the radial compression. The radial alignment is determined by an angle bisector of an angle 26 spanned by the winding 12 or the first and second extension sections 18 and 19. In Fig. 4 In a configuration in which the windings 12 have a radial orientation, the bisector of the angle 26 and the radius 30 of the contact element 10 essentially coincide. The twelve windings 12 of the contact element correspond approximately to the nominal number of windings for an installation diameter DE of approximately 13 mm, a radial extension E r of approximately 4.5 mm, and a wire diameter DD of approximately 1 mm.

[0083] Fig. 5 shows a top view of the contact element 10 from Fig. 2 in the installed state. An elongated part 60 is arranged in the through-opening 24 of the contact element 10. The windings 12 are deformed by the elongated part 60 such that the orientation or the bisector 27 of the angle 26, which is spanned by the extension sections 18 and 19, is at an angle to the radius 30 of the contact element 10. The elongated part 60 expands the diameter 28 of the through-opening 24 to the outer diameter of the elongated part 60 (not specifically designated here).

[0084] Fig. 6 shows an exploded view of a cable gland 50 with the contact element 10 from Fig. 2 The cable gland 50 comprises a compression nut 70, a sealing element 72, a component 52, and an O-ring 74. A contact element 10 is arranged in the component 52. The compression nut 70 can be screwed onto the component 52, whereby the sealing element 72 is compressed and can tightly fit around a long molded part (not shown). The O-ring 74 can seal the cable gland 50 against a connection geometry (not shown).

[0085] Fig. 7 shows a sectional view of the cable gland 50 from Fig. 6 . The contact element 10 is held in a chamber 53 of the component 52 by the radially circumferential shoulder 58. The chamber 53 is delimited radially to a central longitudinal axis 22 by an inner wall 54 and along the central longitudinal axis 22 by a radially circumferential shoulder 58. The second extension section 19 contacts the shoulder 58. The electrical contact between shoulder 58 and the second extension section 19 allows for advantageous current dissipation. The holding section 14 contacts the inner wall 54 of the chamber 53. The electrical contact between the holding section 14 and the inner wall 54 of the chamber 53 also allows for advantageous current dissipation. The design of the contact element 10 ensures that the inner surface of the chamber 53 is optimally used for current dissipation.

[0086] Fig. 8 shows a sectional view of the cable gland 50 from Fig. 6 with an elongated part 60. The elongated part 60 has a stripped part in which a shield 62 is exposed. The shield 62 is electrically contacted in the chamber 53 of the component 52 by the contact element 10. Due to the shape of the spring-like contact element 10, in particular due to the provision of first and second extension sections 18 and 19, the contact element 10 is so torsionally rigid during assembly of the elongated part 60 that tilting of the contact element 10 in the chamber 53 is prevented.

[0087] Fig. 9 shows a sectional view of the cable gland 50 from Fig. 7 in the area between the radially circumferential shoulder 58 and the contact element 10. The contact element 10 can be seen, which is arranged in the chamber 53.

[0088] Fig. 10 shows a sectional view X - X according to Fig. 11 of an alternative contact element 10 with 40 windings 12, only one of which is shown for clarity. The winding 12 has a holding section 14, a first extension section 18, a first support section 16, a second support section 17, and a second extension section 19, which adjoin one another in the specified order.

[0089] Fig. 11 shows a top view of the contact element from Fig. 10 in the non-inserted state. A distance 29.1 is provided between the windings 12.1 and 12.2 in the area of ​​the support sections, which are not labeled for clarity, or the radial sections 20.1 and 20.2 between the first and second support sections.

[0090] Fig. 12 shows a top view of the contact element 10 from Fig. 11 in the inserted state. The distance 29.2 between the support sections, which are not labeled for the sake of clarity, or the radial sections 20.1 and 20.2 between the first and second support sections of the windings 12.1 and 12.2 is smaller than the distance 29.1 from Fig. 11 or completely closed.

[0091] Fig. 13 shows a top view of the contact element 10 from Fig. 11 in the installed state. The long molded part (not shown) arranged in the through-opening 24 deforms the windings 12 such that they touch in the area of ​​the support sections 16.

[0092] Fig. 14 shows an exploded view of an alternative cable gland 50 with the contact element 10 from Fig. 11 The cable gland 50 comprises a compression nut 70, a sealing element 72, a component 52, and an O-ring 74. The contact element 10 is arranged in the chamber 53 of the component 52. The compression nut 70 can be screwed onto an external thread 56 of the component 52, whereby the sealing element 72 is compressed and can nestle tightly around a long molded part (not shown). The O-ring 74 can seal the cable gland 50 against a connection geometry (not shown).

[0093] Fig. 15 shows a sectional view of the cable gland 50 from Fig. 14 , in which the contact element 10 is arranged in the chamber 53 of the component 52 and is held by the circumferential shoulder 58. The extension section 19 rests on the shoulder 58.

[0094] Fig. 16 shows a sectional view of the cable gland 50 from Fig. 14 in which the contact element 10 is arranged in the chamber 53 of the component 52 and is held by the circumferential shoulder 58. The extension section 19 rests on the shoulder 58. An elongated part 60 is arranged in the cable gland 10, the shield 62 of which is electrically contacted by the contact element 10.

[0095] Fig. 17 shows a sectional view XVII - XVII of the cable gland 50 from Fig. 15 . The contact element 10 is arranged in the chamber 53.

[0096] The contact element 10 can be conveniently inserted into a cable gland 50, preventing tilting and unwanted twisting of the contact element 10, particularly during assembly of the particularly flexible long-formed part 60 into the cable gland 50. Furthermore, the proposed shape of the contact element 10 advantageously provides the largest possible electrical contact surface with the component 52.

Claims

1. Cable gland (50) comprising a component (52) and at least one contact element (10), the at least one contact element (10) comprising a plurality of substantially geometrically identically shaped windings (12), each winding (12) comprising a retaining section (14) for electrically contacting the component (52) surrounding the contact element (10), at least one first and one second supporting section (16, 17) for electrically contacting a shield (62) of a long-molded part (60) and a first and a second extending section (18, 19), the retaining section (14), the first extending section (18) and the at least two supporting sections (16, 17) being arranged one after the other and the first supporting section (16) and the second supporting section (17) adjoining each other.

2. Cable gland according to claim 1, characterized in that the first and / or the second extending section (18, 19) extend in a straight line.

3. Cable gland (50) according to one or more of the preceding claims, characterized in that the retaining section (14), the first extending section (18), the second extending section (19) and / or the at least one first and one second supporting section (16, 17) are substantially arranged rectilinear.

4. Cable gland (50) according to one or more of the preceding claims, characterized in that a radial section (20) is formed between the retaining section (14) and the first and second extending sections (19) and / or between the at least one first and one second supporting section (16, 17) and the first and second extending sections (18, 19).

5. Cable gland (50) according to one or more of the preceding claims, characterized in that the first supporting section (16) and the second supporting section (17) have approximately the same length.

6. Cable gland (50) according to one or more of the preceding claims, characterized in that the contact element (10) has an annular or toroidal shape.

7. Cable gland (50) according to one or more of the preceding claims, characterized in that the contact element comprises a component (52) with a chamber (53) which is confined radially to a central longitudinal axis (22) by an inner wall (54) and along the central longitudinal axis (22) by at least one at least partially circumferential shoulder (58).

8. Cable gland (10) according to claim 7, characterized in that the first and / or the second extending section (18, 19) at least partially abuts against the at least one at least partially circumferential shoulder (58) and / or the end wall.

9. Cable gland according to one or more of the preceding claims, characterized in that at least one retaining section (14) of the at least one contact element (10) abuts against an inner wall (54) of a component (52) of the cable gland (50).

10. Cable gland (50) according to one or more of the preceding claims, characterized in that the at least one contact element (10) is accommodated in a chamber (53) of a component (52) which has at least one external thread (56), whereby the at least one long-molded part (60) is guidable through the component (52).

11. Cable gland (50) according to one or more of the preceding claims, having at least one long-molded part (60) which is arranged at least partially in a chamber (53) with the at least one contact element (10), wherein the cable gland (50) and the at least one long-molded part (60) form an installed state, wherein in the installed state the at least one first and one second supporting section (16, 17) of each winding of the at least one contact element (10) abuts at least partially against a shield (62) of the long-molded part (60) and the windings (12) deviate from a radial alignment.

12. Use of a cable gland (50) according to one or more of the preceding claims for electrically contacting at least one shield of at least one long-molded part.