Trailer coupling with an eye assembly

Abstract

The invention relates to a trailer coupling for a motor vehicle (100), comprising a coupling arm (50) which has a coupling element (61) at a free end region (60) and comprising a vehicle mounting (11) on which a holding portion (53) of the coupling arm is held. The longitudinal course (L56) of an arm body (56) of the coupling arm extends between the holding portion (53) and the coupling element, and the arm body has an upper face (66) and an opposite lower face (67) along the longitudinal course of the arm body, wherein in a use position (G) the upper face and lower face are located on an upper and a lower side of the coupling arm (50). The arm body (56) has first and second longitudinal faces (68, 69) at opposite sides, said first and second longitudinal faces extending between the upper face (66) and lower face (67), wherein an eye assembly (80) with at least one eye (81, 82) for securing a securing element (SO1, SO2), namely a securing cable or a securing chain, is arranged on an arm portion (70) of the arm body (56), and the at least one eye (81, 82) has an annularly closed through-channel (83) which at opposite end regions has openings that face the longitudinal faces of the arm body and serve to suspend the securing element, and which extends over a channel length (K83) between the openings. The channel length of the through-channel (83) is shorter than the distance (A70) between the longitudinal faces (68, 69) of the arm body (56) between which the through-channel (83) extends. The through-channel (83) is asymmetrical with respect to a longitudinal center (LM) between the first longitudinal face and the second longitudinal face of the arm portion (70) equipped with the at least one eye (81, 82), such as to be located closer to the first longitudinal face than to the second longitudinal face.

Description

[0001] WESTFALIA-Automotive GmbH, 33378 Rheda-Wiedenbrück

[0002] Trailer coupling with an eyelet arrangement

[0003] The invention relates to a trailer coupling for a motor vehicle, comprising a coupling arm having a coupling element for coupling a trailer or a rear load carrier at a free end region, and comprising a vehicle mount which is attachable or fastened to the motor vehicle and to which a holding section of the coupling arm is held, wherein an arm body of the coupling arm extends between the holding section and the coupling element with a longitudinal extension, wherein the arm body has, along its longitudinal extension, an upper side and an opposite lower side, which, in a position of use intended for coupling the trailer or rear load carrier, are arranged at the top and bottom of the coupling arm, wherein the arm body has, on opposite sides, first and second longitudinal sides extending between the upper side and the lower side,wherein an eyelet arrangement with at least one eyelet for fastening a safety device, namely a safety rope or a safety chain, is arranged on an arm portion of the arm body, wherein the at least one eyelet has an annularly closed passage channel which has openings facing the longitudinal sides of the arm body at its opposite end regions for suspending the safety device and extends over a channel length between the openings, wherein the channel length of the passage channel is shorter than a distance between the longitudinal sides of the arm body between which the passage channel extends.

[0004] A trailer coupling with an eyelet arrangement is, for example, in

[0005] DE 10 2009 050 932 A1 or DE 10 2020 128 980 A1. A trailer coupling with screw receptacles for attaching a trailer socket is known from DE 10 2008 047 547 A1.

[0006] However, the accessibility of the eyelets in this eyelet arrangement is not always optimal.

[0007] It is therefore the object of the present invention to provide an improved trailer coupling.

[0008] To achieve the object, in a trailer coupling of the type mentioned at the outset, it is provided that the passage channel of the at least one eyelet is arranged asymmetrically with respect to a longitudinal center between the first longitudinal side and the second longitudinal side of the arm section on which the at least one eyelet is arranged, closer to the first longitudinal side than to the second longitudinal side.

[0009] At least one eyelet or all of the eyelets of the eyelet arrangement have a minimum diameter of, for example, 8 mm, more preferably 9 mm, even more preferably 10 mm, even more preferably 11 mm, particularly advantageously 12 mm, even more preferably 10 mm. It is particularly preferred if the at least one eyelet or all of the eyelets have or have a minimum diameter of, for example, at least 12 mm, even more preferably at least 13 mm, even more preferably at least 14 mm, or even more preferably at least 15 mm. The minimum diameter of the at least one eyelet or all of the eyelets or several eyelets is particularly preferably at least 16 mm or 17 mm.

[0010] For example, the minimum diameter of at least one eyelet is designed such that a shackle of a breakaway rope or a breakaway chain can be inserted into the eyelet.

[0011] The eyelets of the eyelet assembly are preferably not suitable for mounting a trailer socket. The eyelets of the eyelet assembly are located away from a mounting point or recess in the coupling arm for a trailer socket.

[0012] The eyelets of the eyelet arrangement preferably do not have a screw thread. The eyelets of the eyelet arrangement are preferably arranged on an underside or side of the coupling arm facing away from the motor vehicle and / or not on an upper side of the coupling arm when the coupling arm assumes a use position suitable for attaching a trailer or securing a load carrier.

[0013] At least one eyelet of the eyelet arrangement or all eyelets of the eyelet arrangement are free for attaching the safety device when the coupling arm or fully assembled coupling arm is used or are available for attaching the safety device.

[0014] In each eyelet of the eyelet arrangement, there is therefore no screw or fastening element arranged in the respective eyelet for a component that is permanently attached or can be attached to the coupling arm and / or is required for the operation of the trailer coupling even without a safety device, in particular a trailer socket for the electrical power supply of a trailer.

[0015] The holding section of the coupling arm and the coupling element preferably protrude in front of a particularly straight arm section of the coupling arm or protrude at an angle from the particularly straight arm section, in particular at an angle of, for example, 60-110°.

[0016] At least one eyelet or all eyelets or several eyelets of the eyelet arrangement are advantageously arranged outside a space which is delimited by the coupling element, the holding section and the arm section.

[0017] At least one eyelet of the eyelet arrangement is advantageously arranged on a curved or arcuate portion of the coupling arm close to the coupling ball or coupling element. However, it is also possible for the passage channel to be closer to the second longitudinal side than to the first longitudinal side.

[0018] The basic idea here is that the at least one eyelet is not arranged longitudinally centrally between the two first and second longitudinal sides, but with a lateral offset to this. This makes it possible, for example, to hook in the securing device more easily from the side to which the at least one eyelet is arranged closer than from the other longitudinal side. For example, the first longitudinal side can be the right-hand longitudinal side, which extends to the right from the coupling element when looking at the coupling arm, while the second long side is the left-hand long side in this viewing direction. However, it is also possible conversely, that when looking from the coupling element towards the arm body, the first long side is the left-hand long side and the second long side is the right-hand long side.

[0019] The first longitudinal side can, for example, be a right-hand side or a left-hand side in the direction of travel. The second longitudinal side is, accordingly, a left-hand side or a right-hand side of the coupling arm in the direction of travel. The direction of travel is the direction in which the vehicle is moving forward.

[0020] When the coupling arm assumes a position of use intended for towing a trailer or carrying a load carrier, the coupling arm extends, for example, in a longitudinal direction of the motor vehicle and projects rearward in front of a rear of the motor vehicle with respect to the longitudinal direction of the vehicle.

[0021] The coupling arm can have a curved or bent profile. For example, curvatures of more than 20° between the holding section and the coupling element are possible, hereinafter referred to as longitudinal curvatures, i.e. the coupling arm has, for example, two curved sections with longitudinal curvatures between the holding section and the coupling element, with one longitudinal curvature being closer to the coupling element and the other longitudinal curvature being closer to the holding section, and between the two longitudinal curvatures or

[0022] A straight arm section of the coupling arm extends between the longitudinal curved sections and / or, in the use position, extends approximately horizontally or approximately parallel to the road surface. In the use position of the coupling arm, the longitudinal curves are thus arranged one behind the other, for example, with respect to the vehicle's longitudinal direction.

[0023] The coupling arm may also have at least one curvature in a transverse direction of the vehicle running transversely to the vehicle longitudinal direction, which is referred to below as transverse curvature.

[0024] A curved section can also have a transverse curvature and a longitudinal curvature at the same time, i.e. longitudinal curvature and transverse curvature can overlap at this curved section.

[0025] For example, the coupling arm has a longitudinal curvature and a transverse curvature starting from the holding section, which at least partially overlap.

[0026] In the area of ​​the coupling element, the coupling arm preferably has only one longitudinal curve, i.e., in the vehicle's longitudinal direction or along its longitudinal extension, the coupling arm is straight in the area of ​​this longitudinal curve. At a curved section close to the coupling element or at the longitudinal curve closest to the coupling element, the coupling arm preferably has a straight profile with respect to its longitudinal extension. It is precisely in this area of ​​the coupling arm that a longitudinal center plane between the longitudinal sides can be easily and precisely defined.

[0027] Advantageously, the eyelet arrangement is arranged in the region of the coupling element and / or on the curved section or longitudinal curved section closest to the coupling element.

[0028] However, the eyelet arrangement can also have one or more eyelets on a straight section of the coupling arm, in particular on a straight section of the coupling arm which adjoins the aforementioned longitudinal curved section below or next to the coupling element.

[0029] Furthermore, one eyelet can be arranged on the longitudinal curved section and the other eyelet on the straight section of the coupling arm or on the transition region between the longitudinal curved section and the straight section of the coupling arm.

[0030] The coupling element is preferably a coupling ball.

[0031] A safety device, e.g. a breakaway cable or a breakaway chain, serves to secure the trailer to the trailer coupling and extends between the trailer coupling and the trailer when held on one of the eyelets or at least one eyelet.

[0032] For example, the safety device has a snap hook or similar attachment device with which the safety device can be attached to the eyelet or hooked into the eyelet. However, it is also possible for the safety device to be looped through the eyelet or to be looped through.

[0033] The holding section can be a component of the arm body. For example, the arm body can be firmly connected to the holding section, for example, by screwing and / or bonding. It is also possible for the arm body and the holding section to be integral.

[0034] It is possible for the holding section to be a bearing body or a bearing section of the coupling arm, or to have a bearing section on which the arm body is held. The bearing body or bearing section forms, for example, a component of a pivot bearing and / or sliding bearing with which the coupling arm is movably mounted on the vehicle mount.

[0035] The coupling element is, for example, a coupling ball. The eyelet arrangement can comprise several eyelets, e.g., two eyelets. The configurations described below can be provided for one, several, or all eyelets of the eyelet arrangement. An individual safety device can be hooked into each eyelet or attached to the eyelet. However, it is also possible for a safety device to be attached or attachable to two or more eyelets of the eyelet arrangement.

[0036] It is possible for one or more eyelets to be arranged longitudinally centrally or approximately longitudinally centrally between the long sides of an arm section of the arm body on which the respective eyelet is arranged. However, it is also possible for at least two or more eyelets to be arranged asymmetrically with respect to the long side between the long sides of an arm section of the arm body on which a respective eyelet is arranged. For example, it is possible for one eyelet to be arranged longitudinally centrally between the long sides of an arm section of the arm body on which it is arranged, while another eyelet is arranged asymmetrically with respect to the long side, i.e., closer to one of the two long sides of the arm section of the arm body.

[0037] It is advantageous if at least one eyelet or a passage channel of at least one eyelet is arranged completely or substantially or to at least 60%, further advantageously to at least 70%, even more advantageously at least 80%, and even more advantageously to at least 90% next to or outside the longitudinal center between the longitudinal sides of the arm section on which the respective eyelet is arranged. Thus, the eyelet or its passage channel does not extend, or extends only insignificantly, or to a degree of less than 50% or 60%, from the longitudinal side on which the eyelet is arranged or to which the eyelet is assigned, in the direction of the longitudinal center of the arm section with the eyelet.

[0038] A longitudinally centered arrangement of an eyelet on the arm section or arm body is suitable, for example, in those areas of the arm body that are narrower. For example, a longitudinally centered eyelet can be located in a narrower area of ​​the arm body, while an asymmetrically arranged eyelet with respect to the longitudinal center can be located in a wider area of ​​the arm body than the narrower area.

[0039] The arm body can, for example, have a substantially rectangular or square cross-section at the arm section in the region of the eyelet. However, it is also possible for the arm body to have a round cross-section or a polygonal cross-section with rounded corner regions at the arm section on which the at least one eyelet is arranged. For example, a basically trapezoidal cross-section of the arm section having the eyelet is readily possible. The arm section on which the eyelet is arranged can also have an approximately triangular cross-section, wherein the top side can be the wider side and the underside the narrower side. A curve is then preferably provided on the underside.

[0040] A preferred concept provides that the passage channel of the at least one eyelet arranged asymmetrically with respect to the longitudinal center of the arm section is spaced from the longitudinal center of the arm section. Thus, the at least one eyelet extends from the first longitudinal side toward the second longitudinal side, or the passage channel extends from the first longitudinal side to the second longitudinal side, but not to the longitudinal center of the arm section. The eyelet can therefore be relatively narrow, for example. This makes it easier to attach the securing device.

[0041] It is preferred if an insertion channel in the form of a depression is arranged in the arm body upstream of the passage channel of the at least one eyelet arranged asymmetrically with respect to the longitudinal center of the arm section. The arm body advantageously has a depression which forms an insertion channel for the at least one eyelet. Thus, the insertion channel has, for example, a recess or depression in the arm body or is designed as a recess or depression in the arm body through which the securing element can be moved. The recess or depression in the arm body is not closed in a ring shape, i.e., is not designed in the form of the passage channel of the at least one eyelet. It is possible for an insertion channel to be arranged in front of the at least one eyelet on each of its two opposite sides or both openings. It is possible for one insertion channel to be longer than the other.

[0042] The insertion channel can, for example, be designed in the form of a recess on the arm body.

[0043] The insertion channel is preferably open on a side facing away from the arm body.

[0044] A length of the insertion channel may be greater than a length of the passage channel of the at least one eyelet to which the insertion channel is assigned, wherein the passage channel and the insertion channel are aligned with each other.

[0045] It is advantageous if the passage channel of the at least one eyelet arranged asymmetrically with respect to the longitudinal center of the arm section and / or the insertion channel assigned to and located upstream of this passage channel extends approximately to this longitudinal center.

[0046] It is even more advantageous if this passage channel and / or this insertion channel extends from the longitudinal center to the longitudinal side of the arm section closer to the passage channel or insertion channel. In this configuration, the passage channel extends from one longitudinal side to the longitudinal center of the arm section, and / or the insertion channel extends from the other longitudinal side to the longitudinal center. For hooking the securing device into the eyelet, the passage channel and insertion channel are thus advantageously available across the entire transverse width of the arm section.

[0047] Preferably, the recess or depression on the arm body extends over the entire length of the at least one eyelet. It should be noted at this point that the at least one eyelet advantageously has a longitudinal shape or comprises an elongated hole. It is advantageous if the recess or insertion channel on the arm body has an inner circumferential contour corresponding to the inner circumferential contour of the eyelet or the inner circumferential contour of the passage channel, in particular if the aforementioned inner circumferential contours of the insertion channel and passage channel are aligned with one another.

[0048] It is advantageous if an eyelet with a longitudinal shape or elongated hole is oriented such that its larger diameter or its longitudinal side is approximately parallel to the longitudinal extension of the coupling arm in the region of this eyelet or at a small angle thereto of a maximum of 30°, preferably a maximum of 20°, more preferably a maximum of 10°. However, it is also fundamentally possible for the larger or largest diameter of an eyelet with a longitudinal shape or an elongated hole to be angular, in particular approximately perpendicular, to the longitudinal extension of the coupling arm of this eyelet.

[0049] It is advantageous if the insertion channel extends from the longitudinal side of the arm body to the passage channel from which the passage channel is at a greater distance. For example, if the at least one eyelet is arranged closer to the first longitudinal side, the insertion channel can extend from the second longitudinal side toward the eyelet or its passage channel.

[0050] It is advantageous if the insertion channel extends beyond the longitudinal center of the arm section on which the at least one eyelet is arranged. Therefore, if the eyelet, in particular, does not extend to the longitudinal center, i.e., is narrower than one longitudinal half of the arm section, it is advantageous if the insertion channel extends to the at least one eyelet or to its passage channel.

[0051] An advantageous concept provides that the at least one eyelet does not protrude beyond the first longitudinal side or is aligned with the first longitudinal side. For example, it is possible for the at least one eyelet to be spaced apart from the longitudinal side to which the at least one eyelet is closer. However, it should be mentioned at this point that the at least one eyelet can also protrude beyond the first longitudinal side or beyond the longitudinal side to which the eyelet is closer. It is advantageous if the eyelet only protrudes beyond this longitudinal side, for example the first longitudinal side, by a maximum of 10%, 20%, or 30% of the length of its passage channel.

[0052] It is preferred if the eyelet arrangement has several, for example, two, eyelets. Thus, it is possible, for example, for the at least one eyelet to form a first eyelet and for the eyelet arrangement to include or have at least one second eyelet or further eyelets.

[0053] The multiple eyelets can have the same contour. The multiple eyelets can have passages of equal length or different lengths. The multiple eyelets can have passages with the same cross-sectional geometries or different cross-sectional geometries. Furthermore, the multiple eyelets can have passages with the same or different cross-sectional areas.

[0054] There are several options for arranging these eyelets, which are explained below:

[0055] For example, it is advantageous if the eyelet arrangement has two eyelets which are arranged at different longitudinal distances with respect to the longitudinal course of the coupling element.

[0056] The eyelets spaced apart longitudinally should preferably not overlap. For example, the longitudinal spacing between the eyelets is dimensioned such that another eyelet could fit within this longitudinal spacing.

[0057] It is preferred if at least two, preferably all, eyelets of the eyelet arrangement have passages that are shorter than the distance between the longitudinal sides of the arm section on which a respective eyelet is arranged. It is preferred if the first eyelet and the second eyelet are arranged one behind the other on the arm body with respect to the longitudinal extension of the arm body. The longitudinal extension of the arm body extends from its holding section to the coupling element.

[0058] If the two eyelets or further eyelets are arranged in a row one behind the other with respect to the longitudinal direction, they can, for example, be more easily accessible in order to attach a safety device to a respective eyelet or to hook it into the eyelet or to hook it onto the eyelet.

[0059] It is preferred if at least two of the eyelets arranged one behind the other with respect to the longitudinal extension of the arm body are spaced apart from one another such that their passage channels do not overlap. It is particularly advantageous if there is a longitudinal spacing with respect to the longitudinal extension of the arm body between the passage channels of the eyelets arranged one behind the other, for example, the first eyelet and the second eyelet. The longitudinal spacing is preferably at least 10%, preferably at least 20%, in particular at least 30%, more preferably at least 40% or at least 50%, of the length or diameter of an eyelet.

[0060] The at least one eyelet is preferably configured as an elongated hole. Accordingly, the aforementioned diameter is preferably a longitudinal diameter or a largest diameter of a respective eyelet.

[0061] The eyelets can have the same or different diameters.

[0062] It is also possible that the passage channels of at least two eyelets of the eyelet arrangement have the same or different cross-sectional contours.

[0063] The cross-sectional contour of each through-channel can be the same over its entire length. However, it is also possible for the through-channels or a through-channel to have a narrowing, for example, from one opening to the other. Such a narrowing can, for example, form or have an insertion bevel.

[0064] It is further preferred if the first eyelet and the second eyelet are arranged asymmetrically with respect to a longitudinal center between the first longitudinal side and the second longitudinal side.

[0065] Advantageously, the passage channel of the first eyelet is arranged closer to the first longitudinal side and the passage channel of the second eyelet is arranged closer to the second longitudinal side.

[0066] The first eyelet and the second eyelet can be arranged one behind the other along the length of the arm body. Even with this configuration, it is advantageous if the passages of the two eyelets, which are arranged asymmetrically with respect to the long sides, do not overlap longitudinally or along the length of the arm body. This makes it particularly easy to attach a safety device to each eyelet.

[0067] It is possible, particularly when the eyelets are arranged next to one another or one behind the other in relation to the longitudinal extension of the arm body, for both the first eyelet and the second eyelet to be arranged asymmetrically on the arm section of the arm body, closer to the first longitudinal side or closer to the second longitudinal side. Thus, the two eyelets can be arranged one behind the other in a row, closer to one of the longitudinal sides and further away from the other longitudinal side. The two eyelets can be at the same distance from the longitudinal side to which they are arranged closer, or they can be aligned with this longitudinal side. However, it is also possible for the two eyelets to be at different distances from the longitudinal side to which they are arranged closer than to the other longitudinal side.

[0068] As mentioned, the at least one eyelet or all or several eyelets of the eyelet arrangement advantageously have a longitudinal shape and / or are designed as an elongated hole. However, one or several eyelets or all eyelets of the eyelet arrangement can also have a different inner peripheral geometry, for example, circular or elliptical. It is also possible for one or several or all eyelets of the eyelet arrangement to be polygonal, for example, triangular or square or the like.

[0069] It is preferred if the at least one eyelet, preferably several or all of the eyelets, is integral with the arm body. It is particularly advantageous if the at least one eyelet or several eyelets of the eyelet arrangement are produced, for example, during the forming of a blank from which the arm body is made. For example, the at least one eyelet is already produced during the manufacture of the arm body in the course of a forging process or the like.

[0070] However, as an alternative or in addition to being manufactured as part of a forging process, the arm body can also be machined, for example, by drilling, milling, or the like. For example, one or more eyelets of the eyelet arrangement can be manufactured in this way. It is also possible, for example, for the insertion channel to be manufactured by forging a blank to produce the coupling arm, while the eyelet or its through-channel is manufactured by machining, for example, drilling and / or milling.

[0071] The arm body and the coupling element and / or the arm body and the holding section are preferably made in one piece. In particular, it is advantageous if the entire coupling arm, including its holding section, the coupling element, and the eyelet arrangement, is manufactured from a single blank.

[0072] Furthermore, it is advantageous if the arm body has a recess for a trailer socket or for attaching a trailer socket. The at least one eyelet of the eyelet arrangement or all of the eyelets of the eyelet arrangement is or are preferably arranged apart from and away from the recess for the trailer socket and / or is / are unsuitable for attaching a trailer socket to the recess. The at least one eyelet of the eyelet arrangement or all of the eyelets of the eyelet arrangement is / are preferably unsuitable for attaching the trailer socket or a trailer socket to the coupling arm and / or is / are not designed as through-openings or screw receptacles for a screw.

[0073] The arm body can have one or more curved sections or arc sections. It is particularly preferred if the arm body has a curved section or arc section arranged close to the coupling element and a curved section or arc section arranged close to the holding section. The curved sections or arc sections can be connected by a straight or substantially non-curved or curved section or longitudinal section of the arm body.

[0074] It is preferred if at least one eyelet is arranged on the curved section or arc section. In particular, it is advantageous if the at least one eyelet or several eyelets are arranged on the curved section or arc section close to the coupling element.

[0075] In particular, at least one eyelet of the eyelet arrangement or several eyelets of the eyelet arrangement can be arranged on a portion of the arm body that is located directly below or adjacent to the coupling element. It is advantageous if the eyelet arrangement is arranged close to the coupling element.

[0076] Advantageously, at least one eyelet of the eyelet arrangement has a passage channel, which is partially formed as a recess on the arm body at the arm section and partially delimited by an annular body projecting in front of the arm body. Advantageously, one half or approximately one half of the cross-section of the passage channel is provided by the recess or is defined by the recess, while the other half is delimited by the annular body. The recess on the arm body is, for example, a depression on a side surface or side wall of the arm body, on which the recess is arranged and in front of which the annular body projects.

[0077] It is also possible for the recess to be less deep or deeper, i.e. for example, less than 50% or less than 40% or less than 30% of the cross section of the passage channel is provided by the recess, while the complementary area of ​​the cross section of the passage channel is delimited by the annular body.

[0078] Advantageously, the recess is aligned with the insertion channel and / or has the same contour. Thus, the recess and the insertion channel can have a uniform or identical contour overall or at least in a transition area where the recess and the insertion channel merge.

[0079] Advantageously, the ring body projects in front of the recess and / or the insertion channel.

[0080] Furthermore, a respective ring body advantageously projects in front of a side surface or side wall of the arm body on which the eyelet is arranged.

[0081] The ring body advantageously extends over the respective recess.

[0082] The ring body, for example, has an arcuate or curved shape or arcuate sections. However, the ring body can also have elongated or straight sections.

[0083] The annular body and / or the at least one eyelet and / or several eyelets and / or all eyelets of the eyelet arrangement advantageously protrude beyond the underside of the arm body. It is advantageous if the at least one eyelet protrudes exclusively beyond the underside of the arm body and not laterally beyond the arm body. In the use position, the underside of the arm body can also be a free side of the arm body facing away from the motor vehicle, particularly if the underside extends over a curved or arcuate section of the coupling arm.

[0084] The coupling arm can be firmly connected to the vehicle mount.

[0085] However, it is also possible for the coupling arm to be detachably attached to the vehicle mount using a fixing device. For example, a plug-in connection is advantageous, with the coupling arm having a plug-in projection or a plug-in section that can be plugged into a plug-in receptacle or a plug-in section of the vehicle mount.

[0086] Furthermore, it is advantageous if the coupling arm is adjustable between a use position and a non-use position using a bearing arrangement or a bearing arranged on the vehicle mount. In the use position, the coupling arm projects, for example, backwards in front of the motor vehicle for coupling a trailer or rear load carrier when the trailer coupling is attached to the motor vehicle. In the use position, the coupling arm is arranged, for example, hidden behind and / or beneath a bumper of the motor vehicle. For example, the bearing is a pivot bearing. The coupling arm is mounted on the bearing or bearing arrangement so that it can pivot through a pivot angle of at least 90°.

[0087] It is advantageous if at least one eyelet is integral with the coupling arm.

[0088] Exemplary embodiments of the invention are explained below with reference to the drawings. They show:

[0089] Figure 1 is an exploded view of an inventive

[0090] Trailer coupling, in perspective view, Figure 2 shows a coupling arm of the trailer coupling according to Figure 1 in the position of use and in dashed lines in the position of non-use,

[0091] Figure 3 is a frontal view of the coupling arm according to Figure 2 from behind its coupling element,

[0092] Figure 4 is a side view of the coupling arm of Figures 2 and 3,

[0093] Figure 5 is a side view of a vehicle mount according to Figure 1,

[0094] Figure 6 is a side view of a holding section or bearing section of the coupling arm according to the preceding figures,

[0095] Figure 7 is a cross-sectional view of a pivot bearing of the trailer coupling according to Figure 1, approximately along a section line XX in Figure 1,

[0096] Figure 8 is a sectional view of another trailer coupling with a vehicle mount having a plug-in receptacle for inserting a coupling arm,

[0097] Figure 9 is an exploded view of another trailer coupling according to the invention, approximately corresponding to the perspective view in Figure 1, wherein an eyelet arrangement with a different geometry is provided,

[0098] Figure 10 shows a coupling arm of the trailer coupling according to Figure 9, approximately corresponding to the illustration in Figure 2,

[0099] Figure 11 is a front view of the coupling arm according to Figure 10 and

[0100] Figure 12 is a side view of the coupling arm according to Figures 9 to 11, approximately corresponding to the view according to Figure 4. A trailer coupling 10, 110 is fastened or can be fastened to a rear 101 of a motor vehicle 100.

[0101] The trailer coupling 10, 110 advantageously comprises a support arrangement 90 with a cross member 91, which is fastened or can be fastened to a body 102 of the motor vehicle 100, for example a passenger car, an electric vehicle or the like, by means of side supports shown (not shown).

[0102] A vehicle bracket 11 of the trailer coupling 10, 110 is arranged on the cross member 91, e.g. fastened to the cross member 91 by means of screws.

[0103] A bearing concept of coupling arms 50, 150 of the trailer couplings 10, 110 is explained below.

[0104] The vehicle mount 11 pivotally supports the coupling arm 50, 150 about a pivot axis S between a use position G, which is provided for coupling, in particular for towing, a schematically illustrated trailer AH or coupling a schematically illustrated load carrier LT, and a non-use position N, which the coupling arm 50, 150 can assume when not in use, for example, when no trailer is to be towed. The non-use position N is shown in Figure 2 in dashed lines, the use position G in solid lines.

[0105] The vehicle mount 11 thus forms, for example, a bearing base 11A.

[0106] In the use position G, the coupling arm 50, 150 projects downwards in front of a bumper 103 of the motor vehicle 100, for example, so that a coupling arm 80 can be fastened to the coupling arm 50, 150. In the non-use position N, the coupling arm 50, 150 is adjusted, for example, closer to the body 102 of the motor vehicle 100, for example behind and / or below the bumper 103. The vehicle mount 11 comprises a connecting section 12, which is held on the cross member 91 and is welded and / or screwed thereto, for example. A support section 13, which is designed, for example, in the manner of a plate, projects from the connecting section 12. A bearing body 14 projects from the support section 13. The bearing body 14 is held on a receptacle 16 of the vehicle mount 11. For example, screw elements 17 and 18 are held on the receptacle 16, to which the bearing body 14 is held, for example by means of a screw connection.

[0107] The bearing body 14 is, for example, tubular. The bearing body 14 is, for example, a shaft body, in particular a hollow shaft.

[0108] The coupling arm 50, 150 is rotatably mounted on the bearing body 14. For example, the bearing body 14 engages in a bearing receptacle 54 of a holding section 53 of the coupling arm 50, 150.

[0109] The holding section 53 forms a bearing section 53A, which is pivotally mounted on the bearing base 11A about the pivot axis S.

[0110] The trailer coupling 10, 110 has a fixing device 20 for fixing the coupling arm 50, 150 to the vehicle mount 11 in the use position G and the non-use position N.

[0111] The fixing device 20 comprises, for example, form-locking elements 21 which are arranged on an end face 15 of the support section 13, and counter-form-locking elements 22 which are arranged on an end face 55 of the holding section 53 of the coupling arm 50, 150.

[0112] The form-locking elements 21 extend around the bearing body 14 and the counter-form-locking elements 22 extend around the bearing receptacle 54 of the coupling arm 50, 150.

[0113] By a linear adjustment of the coupling arm 50, 150 from the

[0114] Vehicle mount 11 parallel to the pivot axis S, the form-locking elements 21 and the counter-form-locking elements 22 can be brought into engagement so that the fixing device 20 assumes a fixing position F, or disengaged so that the fixing device 20 assumes a release position L. In the fixing position F, the coupling arm 50, 150 is fixed in position with respect to the vehicle mount 11; in the release position L, the coupling arm 50, 150 can be pivoted between the use position G and the non-use position N with respect to the vehicle mount 11.

[0115] The form-locking elements 21 comprise, for example, form-locking receptacles 21A, 21B and 21C for the form-locking engagement of form-locking projections 22A, 22B and 22C of the counter-form-locking elements 22.

[0116] In principle, it is possible for all form-locking elements 21 and counter-form-locking elements 22 to have identical geometries. However, different geometries are provided here, such that the form-locking elements 21 and the counter-form-locking elements 22 fit into each other only in the use position G and the non-use position N. For example, the form-locking receptacles 21A and the form-locking projections 22A are spherical caps and balls, while the form-locking receptacles 21B and the form-locking projections 22B have a somewhat elongated shape, and finally, the form-locking receptacles 21C and the form-locking projections 22B have a longitudinal shape.

[0117] The fixing device 20 further comprises a fixing drive 23, with which the form-locking elements 21 and the counter-form-locking elements 22 can be disengaged and engaged. The fixing drive 23 thus actuates the coupling arm 50, 150 parallel to the pivot axis S between the fixing position F and the release position L.

[0118] The fixing drive 23 comprises a drive body 24, for example a bolt-like drive body, which is accommodated in a guide channel 24A of the bearing body 14 so as to be linearly displaceable, in this case parallel to the pivot axis S. The drive body 24 is loaded by a spring 25 into a position assigned to the fixing position F, in which position at least one actuating contour 26 of the drive body 24 actuates transmission bodies 27, for example balls, radially outwards with respect to the pivot axis S, through channels 27A running radially to the pivot axis S in the direction of an actuating contour 28 on a drive body 29, which is fixedly attached to the coupling arm 50, 150, for example forming a fixed component thereof or being firmly connected thereto.

[0119] The actuating contours 26, 28 comprise, for example, one or more inclined surfaces, in particular extending in a ring shape around the pivot axis S, which cause a force deflection such that by a movement of the drive body 24 in a direction towards the coupling arm 50, 150, the coupling arm 50, 150 is loaded in a direction opposite thereto towards the vehicle mount 11, so that the form-locking elements 21 and the counter-form-locking elements 22 engage with one another.

[0120] To release this positive locking between the positive locking elements 21 and the counter-positive locking elements 22, i.e. for actuation in the direction of the release position L, it is provided that the drive body 24 is or will be driven by a release drive 30, for example an electric motor, against the force of the spring 25 in a direction away from the coupling arm 50, 150, whereby the actuating contours 26 release the transmission bodies 27, so to speak, so that they can be moved into the channels 27A and thus release the coupling arm 50, 150 for movement away from the vehicle holder 11.

[0121] Furthermore, at least one release actuation contour 31 is arranged on the drive body 24, which acts on transmission bodies 32, for example balls, which can be actuated radially outwards with respect to the pivot axis S through channels 33 by means of the at least one release actuation contour 31 in order to be able to act on at least one counter contour 34 which is arranged on the drive body 29 of the coupling arm 50, 150 and, when force is applied by the transmission bodies 32, causes the coupling arm 50, 150 to be adjusted in the direction of the release position L.

[0122] The drive body 29 is accommodated, for example, in a receptacle 51 of the coupling arm 50, 150, which forms part of the bearing receptacle 54 or is arranged next to it.

[0123] Advantageously, the drive body 29 is positively received in the receptacle 51.

[0124] Advantageously, the drive body 29 is pressed into the holder 51.

[0125] It is advantageous if the drive body 29 is held firmly in the receptacle 51, for example, by being glued and / or welded. The drive body 29 is, for example, sleeve-shaped.

[0126] The actuating contour 28 and the counter contour 34 can, for example, be opposite inclined surfaces, in particular annular inclined surfaces.

[0127] The drive body 29 has a bearing opening or bearing receptacle 35, in particular a through-opening, for the bearing body 14, for example the hollow shaft, so that the drive body 29 is mounted on the bearing body 14 so as to be rotatable about the pivot axis S and displaceable parallel to the pivot axis S. The bearing body 14 engages in the bearing receptacle 35.

[0128] The holding section 53 comprises, for example, or is formed by a bearing body 52. ​​The bearing receptacle 54, the receptacle 51, and the end face 55 with the counter-form-locking elements 22 are provided on the bearing body 52.

[0129] An arm body 56 of the coupling arm 50, 150 protrudes from the holding section 53 of the coupling arm 50, 150. In contrast to the previous embodiments, a vehicle mount 311 of the trailer coupling, which is attached or attachable to the motor vehicle 100, is

[0130] 310 is provided to releasably fasten the coupling arm 350 so that the coupling arm 350, when not in use or in a non-use position N, assumes a position remote from the vehicle holder 311, for example it can be stowed in the luggage compartment of the motor vehicle 100.

[0131] For example, the vehicle mount 311 has a receiving body 312 for receiving and holding a holding portion 353 of the coupling arm 350. The holding portion 353 is configured, for example, as a plug-in projection 354 or has a plug-in projection 354 provided for insertion into a plug-in receptacle 314 of the vehicle mount 311. The plug-in receptacle 314 is provided, for example, on the receiving body 312. However, during use or in a use position G, the coupling arm 350 is fastened to the vehicle mount 311, for example, by inserting the plug-in projection 354 into the plug-in receptacle 314.

[0132] A fixing device 320 is used to fix the coupling arm 350 to the vehicle mount 311. The fixing device 320 comprises on the vehicle mount

[0133] 311 fixedly arranged, not shown form-locking elements, for example form-locking receptacles, into which, in a fixing position F of the fixing device 320 on the coupling arm 350, fixedly arranged, not shown counter form-locking elements, for example form-locking projections, engage when the plug-in projection 354 is inserted into the plug-in receptacle 314.

[0134] For example, the form-fitting receptacles and form-fitting projections are triangular or wedge-shaped contours that are arranged laterally on the receiving body 312, which is designed, for example, as a plug-in sleeve, or on the coupling arm 350.

[0135] Furthermore, the fixing device 320 comprises a fixing drive 323 with a drive body 324, which is arranged in a groove extending in the plug-in projection 354.

[0136] Guide channel 24A and is loaded by a spring 325 into a fixing position F of the fixing device 320, in which the fixing device 320 fixes or locks the coupling arm 350 to the vehicle mount 311, indicated by an arrow F for the fixing position. The drive body 324 serves to actuate form-locking bodies 327, for example designed as a ball, through channels 327A in the direction of a receiving contour 328, for example an annular groove in the plug-in receptacle 314. When the form-locking bodies 327 engage in the receiving contour 328, the plug-in projection 354 is locked in the plug-in receptacle 314 with respect to an assembly plug-in axis MS, along which the plug-in projection 354 can be inserted into or removed from the plug-in receptacle 314. Then the form-locking elements fixed to the plug-in receptacle and the coupling arm can no longer disengage.

[0137] A release drive 330 is used to release the positive engagement between the positive engagement bodies 327 and the receiving contour 328, indicated by an arrow L corresponding to the release position. The release drive 330 comprises a handwheel (not shown) with which a gear 332 can be actuated. The gear 332 meshes with a rack section 333 that forms part of the drive body 324 or is connected thereto. Thus, by turning the handwheel, an operator can move the drive body 324 away from the channels 327A against the force of the spring 325 such that the positive engagement bodies 327 can move into the channels 327A and thus disengage from the receiving contour 328.

[0138] The arm body 56 protrudes from the holding section 353 of the coupling arm 350, but is only partially shown in Figure 8 for reasons of simplification.

[0139] The arm body 56 has, starting from the holding section 53, 353, a curved section or arc section 57, which transitions into a longitudinal section 58 arranged between the curved section or arc section 57 and another curved section or arc section 59. A coupling element 61 for coupling the load carrier LT or trailer AH is arranged at the free end region 60 of the arm body 56 or the coupling arm 50, 350. A substantially cylindrical support section 63 supporting the coupling element 61 can be provided between the coupling element 61 and the curved section or arc section 59.

[0140] The arm body 56 has a longitudinal profile L56 shown schematically in Figure 4, along which functional units, for example a socket not shown in the drawing for an electrical power supply of the trailer AH or the load carrier LT, can be arranged.

[0141] For example, the arm body 56 has a receptacle 64 for a socket, into which the socket can be inserted in a manner not shown. A cable receptacle 65 for an electrical cable leading to the receptacle 64 or the socket arranged therein, also not shown, is provided laterally next to the receptacle 64.

[0142] The arm body 56 has an upper side 66 arranged at the top in the use position G, a lower side 67 opposite this, and longitudinal sides 68 and 69 which extend between the upper side 66 and the lower side 67. It can be seen in Figure 2 that the upper side 66 represents a lower side, so to speak, in the non-use position N, while the lower side 67 is pivoted upwards. The longitudinal side 68 is a right-hand longitudinal side when viewed from the coupling ball 62 or the coupling element 61 in the direction of the holding section 53. The long side 69 is a left-hand longitudinal side of the arm body 56 in this viewing direction. The long side 68 can be referred to or viewed as a first longitudinal side and the long side 69 as a second longitudinal side. However, it is also possible to refer to or view the long side 68 as a second longitudinal side and the long side 69 as a first longitudinal side.

[0143] On an arm section 70 of the arm body 56, an eyelet arrangement 80 is arranged on the coupling arm 50, with an eyelet 81 arranged closer to the coupling element 61 and an eyelet 82 further away from the coupling element 61. The coupling arm 150 has an eyelet arrangement 180 with eyelets 181 and 182, wherein the eyelet 181, corresponding to the eyelet 81, is arranged closer to the coupling element 61 than the eyelet 182.

[0144] The arrangement of the eyelets 81, 82 and 181, 182 in relation to one another and / or with respect to the arm body 56 is preferably identical or similar. However, for example, the eyelet 81 is arranged closer to the coupling element 61 or extends further in the direction of the coupling element 61 than the eyelet 181. For example, the eyelet 81 has a distance L81 from the coupling element 61, and the eyelet 181 has a distance L181 from the coupling element 61 that is greater than the distance L81.

[0145] The eyelets 81, 181, and 82, 182 serve for attaching a safety device SO1 and a safety device SO2. The safety devices SO1 and SO2 are shown schematically. For example, the safety devices SO1 and SO2 are breakaway cables or the like. The safety devices SO1 and SO2 can be attached to the eyelets 81, 181 and 82, 82, for example, using snap hooks or the like.

[0146] The eyelets 81, 81 and 82, 82 have passage channels 83 extending between openings 84 and 85 at opposite end regions of the passage channels 83. For example, the openings 84 are associated with or face the longitudinal side 68 of the arm body 56, while the openings 85 are associated with or face the longitudinal side 69 of the arm body 56.

[0147] The passage channels 83 have a channel length K83. The channel length K83 is smaller than a distance A70 between the longitudinal sides 68 and 69 of the arm body 56 at an arm section 70 on which the eyelets 81, 181 and 82, 182 of the eyelet arrangement 80, 180 are arranged. For example, the arm section 70 is provided at the curved section or arc section 59 and thus at a section of the arm body 56 close to the coupling element 61.

[0148] In addition, the eyelets 81, 181 and 82, 182 are arranged asymmetrically with respect to a longitudinal center LM of the arm section 70. The longitudinal center LM is the center between the longitudinal sides 68 and 69 in the region of the arm section 70. The eyelet 82 and / or its passage channel 83 is arranged, for example, closer to the longitudinal side 68.

[0149] The eyelets 81, 181 and 82, 182 are provided with insertion channels 86 and 87. The insertion channels 86 are provided on the arm body 56 or arm section 70 of the arm body 56.

[0150] The passages 83 of the eyelets 81, 181 and 82, 182 do not extend to the longitudinal center LM. Thus, both passages 83 are shorter than half the distance between the longitudinal sides 68 and 69 in the area of ​​the arm section 70.

[0151] For example, eyelets 181 and 182 are circular or approximately circular.

[0152] The eyelets 81 and 82 have a longitudinal shape or are designed as an elongated hole.

[0153] The eyelets 81 and 82 have the same longitudinal diameter B80.

[0154] The eyelets 81 and 82, as well as 181 and 182, are spaced apart from one another with respect to the longitudinal extension L56 of the arm body 56. For example, they have a distance of A80 and A180, respectively.

[0155] The distances A80 and A180 are, for example, distances between the facing inner circumferences of the eyelets 81 and 82 or 181 and 182. Therefore, the eyelets 81 and 82 or 181 and 182 do not overlap.

[0156] The longitudinal diameters of the eyelets 81 and 82 are approximately parallel to the longitudinal extension L56. It is understood that an orientation of an eyelet at an angle to the longitudinal extension L56 is also possible, which is the case, for example, with the schematically indicated eyelet 382.

[0157] The eyelets 81 and 82 have recesses 88 which serve as depressions on the

[0158] Arm body 56 or arm section 70. The recesses 88 are aligned with the insertion channels 86 and 87. The recesses 88 form

[0159] Components of the passage channels 83.

[0160] The passage channels 83 are further delimited by annular bodies 89, which extend beyond the respective recess 88 and thus delimit the passage channel 83 of a respective eyelet 81 or 82.

[0161] The annular bodies 89 protrude from a side surface 71 of the arm portion 70 or the arm body 56. The recesses 88 are designed as depressions on the side surface 71.

Claims

Claims 1 . Trailer coupling for a motor vehicle (100) with a coupling arm (50; 150; 350) which has a coupling element (61) for coupling a trailer (AH) or a rear load carrier (LT) at a free end region (60), and with a vehicle mounting (11) which is fastenable or fastened to the motor vehicle (100) and on which a holding section (53) of the coupling arm (50; 150; 350) is held, wherein an arm body (56) of the coupling arm (50; 150; 350) extends between the holding section (53) and the coupling element (61) with a longitudinal extension (L56), wherein the arm body (56) has, along its longitudinal extension (L56), an upper side (66) and an opposite lower side (67) which, in a position of use (G) which is used for coupling the trailer (AH) or Rear load carrier (LT) is provided, at the top and bottom of the coupling arm (50; 150;350) are arranged, wherein the arm body (56) has first and second longitudinal sides (68, 69) extending between the top side (66) and bottom side (67) on opposite sides, wherein an eyelet arrangement (80) with at least one eyelet (81, 82; 181, 182) for fastening a safety element (SO1, SO2), namely a safety rope or a safety chain, is arranged on an arm section (70) of the arm body (56), wherein the at least one eyelet (81, 82;181, 182) has an annularly closed passage channel (83) which has openings facing the longitudinal sides (68, 69) of the arm body (56) at its opposite end regions for suspending the securing member (SO1, SO2) and which extends over a channel length (K83) between the openings, the channel length (K83) of the passage channel (83) being shorter than a distance (A70) between the longitudinal sides (68, 69) of the arm body (56) between which the passage channel (83) extends, characterized in; that the passage channel (83) of the at least one eyelet (81, 82; 181, 182) is arranged asymmetrically with respect to a longitudinal center (LM) between the first longitudinal side (68, 69) and second longitudinal side (68, 69) of the arm section (70) on which the at least one eyelet (81, 82; 181, 182) is arranged, closer to the first longitudinal side (68, 69) than to the second longitudinal side (68, 69).

2. Trailer coupling according to claim 1, characterized in that the passage channel (83) of the at least one eyelet (81, 82; 181, 182) arranged asymmetrically with respect to the longitudinal center (LM) of the arm section (70) has a distance (A70) from the longitudinal center (LM) of the arm section (70).

3. Trailer coupling according to claim 1 or 2, characterized in that an insertion channel (86, 87) in the form of a recess on the arm body (56) is arranged upstream of the passage channel (83) of the at least one eyelet (81, 82; 181, 182) arranged asymmetrically with respect to the longitudinal center (LM) of the arm section (70).

4. Trailer coupling according to claim 3, characterized in that the insertion channel (86, 87) extends from that longitudinal side (68, 69) of the arm body (56) to the passage channel (83) from which the passage channel (83) has a greater distance (A70).

5. Trailer coupling according to claim 3 or 4, characterized in that the insertion channel (86, 87) extends beyond the longitudinal center (LM) of the arm section (70) on which the at least one eyelet (81, 82; 181, 182) is arranged, and / or extends to the longitudinal center (LM) of the arm section (70) on which the at least one eyelet (81, 82; 181, 182) is arranged.

6. Trailer coupling according to one of the preceding claims, characterized in that the at least one eyelet (81, 82; 181, 182) does not protrude in front of the first longitudinal side (68, 69) or is aligned with the first longitudinal side (68, 69).

7. Trailer coupling according to one of the preceding claims, characterized in that the at least one eyelet (81, 82; 181, 182) forms a first eyelet (81) and the eyelet arrangement (80) comprises at least one second eyelet (82).

8. Trailer coupling according to claim 7, characterized in that the first eyelet (81) and the second eyelet (82) are arranged one behind the other on the arm body (56) with respect to the longitudinal extension (L56) of the arm body (56).

9. Trailer coupling according to claim 7 or 8, characterized in that the first eyelet (81) and the second eyelet (82) are arranged asymmetrically with respect to a longitudinal center (LM) between the first longitudinal side (68, 69) and the second longitudinal side (68, 69).

10. Trailer coupling according to claim 9, characterized in that the passage channel (83) of the first eyelet (81) is arranged closer to the first longitudinal side (68, 69) and the passage channel (83) of the second eyelet (82) is arranged closer to the second longitudinal side (68, 69).

11. Trailer coupling according to one of the preceding claims, characterized in that the at least one eyelet (81, 82; 181, 182) or its passage channel (83) is designed as an elongated hole or has a polygonal or round passage cross-section provided for hanging the securing member (SO1, SO2).

12. Trailer coupling according to one of the preceding claims, characterized in that the at least one eyelet (81, 82; 181, 182), preferably all eyelets (81, 82; 181, 182), is integral with the arm body (56).

13. Trailer coupling according to one of the preceding claims, characterized in that the arm body (56) has at least one curved section or arc section (59), in particular arranged next to the coupling element (61).

14. Trailer coupling according to one of the preceding claims, characterized in that at least one eyelet (81, 82; 181, 182) of the eyelet arrangement (80) is arranged on the curved section or arc section (59).

15. Trailer coupling according to claim 14, characterized in that the at least one curved section or arc section (59) is arranged between a longitudinal section (58) connected to the holding section (53) and the coupling element (61).

16. Trailer coupling according to one of the preceding claims, characterized in that the eyelet arrangement (80) is arranged close to the coupling element (61).

17. Trailer coupling according to one of the preceding claims, characterized in that at least one eyelet (81) of the eyelet arrangement (80) has a passage channel (83) which is partially formed as a recess (88) on the arm body (56) on the arm section (70) and is partially delimited by an annular body (89) projecting in front of the arm body (56).

18. Trailer coupling according to claim 17, characterized in that the recess (88) is aligned with and / or has the same contour as the insertion channel (86, 87) located upstream of the at least one eyelet (81, 82; 181, 182) and arranged on the arm body (56).

19. Trailer coupling according to one of the preceding claims, characterized in that at least one eyelet (81, 82; 181, 182) of the eyelet arrangement (80) and / or a passage channel (83) of at least one eyelet (81, 82; 181, 182) is arranged completely or at least 80% next to the longitudinal center (LM) between the first longitudinal side (68, 69) and the second longitudinal side (68, 69) of the arm section (70) with the at least one eyelet (81, 82; 181, 182).

20. Trailer coupling according to one of the preceding claims, characterized in that the coupling arm (50; 150; 350) is firmly connected to the vehicle mounting (11) or by means of a fixing device (20; 320) is detachably attachable to the vehicle mount (11) or is adjustably mounted between a use position (G) and a non-use position (N) by means of a bearing arranged on the vehicle mount (11). 21 . Trailer coupling according to claim 20, characterized in that it has a bearing base (11A) on which a coupling arm (50; 150; 350) with a bearing section is pivoted about a pivot axis (S) between a trailer (AH) or the rear load carrier (LT) and a non-use position (N) provided for non-use of the trailer coupling (10; 310).

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