Fastening device for at least one line on a motor vehicle component and motor vehicle

Abstract

The invention relates to a fastening device (10) for at least one line (12) on a motor vehicle component, comprising a fastening element (14) which is designed to be attached to the motor vehicle component, and a spring element (16) supported on the fastening element (14) which is designed to hold the at least one line (12) by circumferentially encompassing the line (12), wherein the spring element (16) comprises at least one spring arm (26) which is supported at one end against the fastening element (14) and is designed to support the line (12) at the other end with its free end (30) in order to dampen vibrations of the line (12) relative to the fastening element (14), wherein the spring arm (26) has at least one deflection (32) along its longitudinal extension direction from its end associated with the fastening element (14) to its free end (30).

Description

[0001] The invention relates to a fastening device for at least one line on a motor vehicle component and to a motor vehicle.

[0002] DE 10 2014 109 270 A1 discloses a cable fixation device for securing an electrical cable to a connector, comprising a first shell element with a first fixing element for exerting pressure against the cable and a first housing connection element for connecting the first shell element to a housing element of the connector. The cable fixation device further comprises a second shell element with a second fixing element for exerting pressure against the cable and a second housing connection element for connecting the second shell element to the housing element of the connector. The first and second shell elements are designed such that they can be connected to each other, so that together they essentially surround the cable in a ring shape, and the first and second housing connection elements form a positive-locking connection with the housing element of the connector when the cable fixation device is mounted on the housing element.

[0003] Furthermore, a two-part cable clamp for securing a cable is known from EP 1 493 954 B1. The two-part cable clamp comprises a body having an opening and an insert placed in the opening. The body and the insert form a notch in the opening for receiving and holding a cable.

[0004] The object of the present invention is to provide a solution by which structure-borne sound transmission from a line to a motor vehicle component can be kept particularly low.

[0005] This problem is solved according to the invention by the subject matter of the independent claims. Further possible embodiments of the invention are disclosed in the dependent claims, the description, and the figures. Features, advantages, and possible embodiments set forth in the description for one of the subject matter of the independent claims are to be regarded, at least analogously, as features, advantages, and possible embodiments of the respective subject matter of the other independent claims, as well as of any possible combination of the subject matter of the independent claims, optionally in conjunction with one or more of the dependent claims.

[0006] The invention relates to a fastening device for at least one line on a motor vehicle component. The line is, in particular, a coolant line designed to carry coolant. The fastening device is designed to minimize structure-borne noise transmission from the coolant line to the motor vehicle component. For this purpose, the fastening device comprises a fastening element and a spring element supported on the fastening element. The fastening element is designed to be attached to the motor vehicle component. This means that the fastening device can be attached to the motor vehicle component via the fastening element. The spring element is designed to hold the at least one line by circumferentially gripping the line.The cable can thus be held by the spring element and attached to the vehicle component via the spring element. The build-up and release of spring tension in the spring element dampens vibrations of the cable, thereby reducing, and in particular preventing, the transmission of structure-borne noise from the cable to the vehicle component. This ensures that the cable is securely held against the mounting element by the spring element and that vibrations are reliably dampened.

[0007] The spring element comprises at least one spring arm, which is supported at one end against the fastening element and is designed to support the line with its free end at the other end in order to dampen the vibrations of the line relative to the fastening element. This means that the spring element is designed to be rigidly connected at one end to the fastening element and thus, via the fastening element, to the vehicle component, and at the other end to the line, whereby the vibrations of the line relative to the vehicle component can be dampened by deformation of the spring element.

[0008] To dampen these vibrations particularly effectively, the spring arm is designed to have at least one deflection along its longitudinal direction, from its end associated with the fastening element to its free end associated with the line. A deflection means that the spring element undergoes a change in direction with respect to its longitudinal extent in the area of ​​the deflection. Thus, the spring element has at least one kink or bend. This bend or kink provides a predetermined bending point or kink point in the spring element, at which the spring element can be elastically bent or kinked to allow relative movement of the line relative to the vehicle component during intended use, thereby dampening vibrations of the line relative to the vehicle component.By incorporating the predetermined bending point or kink, the spring element bends or kinks particularly easily as soon as the line vibrates, thus effectively preventing vibration transmission from the line to the vehicle component. The mounting device therefore enables particularly good damping of the line's vibrations relative to the vehicle component.

[0009] In a possible embodiment of the invention, the spring element is designed as a circumferential band that can encircle the conductor. In particular, the spring element is configured to encircle the conductor when used as intended. The spring element comprises an outer band element, which is completely closed. The outer band element is radially supported on the outer circumference by the fastening element, thereby fixing the spring element in its position relative to the fastening element. At least one spring arm projects radially inwards from this outer band element of the spring element. This allows the free end of the spring arm to be applied to the conductor when the outer band element is arranged to circumferentially encircle the conductor.In other words, the spring element, in its configuration as a circumferential band, has at least one opening through which the cable can be inserted for attachment to the fastening element. By designing the spring element as a circumferential band, the cable can be held particularly securely by the fastening device through the circumferential encirclement of the cable by the spring element.

[0010] In this context, it can be provided that several spring arms project radially inwards from the outer band element. Because the spring element has several spring arms projecting radially inwards from the outer band element and each being supported against the conductor, vibrations of the conductor in a particularly large number of different directions can be damped very effectively by means of the spring element. Two of these spring arms, directly adjacent to each other in the circumferential direction, can be designed to be mirror-symmetrical to each other. The mirror-symmetrical design of the circumferentially adjacent spring arms means that these spring elements are oriented in a mirror-image fashion with respect to their deflection. The deflection occurs, in particular, about an axis extending in the axial direction of the fastening device.In this configuration, the axial direction of the fastening device coincides with the longitudinal direction of the cable when the cable is attached to the fastening device. Because the deflections of the spring arms are opposite to each other in the direction of rotation, the spring element effectively dampens vibrations of the cable in a wide variety of directions.

[0011] In a further possible embodiment of the invention, two circumferentially adjacent spring arms are arranged so that their respective free ends abut each other. This means that the circumferentially adjacent spring elements, which can be designed to be mirror-symmetrical or asymmetrical to each other, can be applied to the conduit at least substantially together. This means that vibrations introduced into the spring element via the conduit can be particularly well balanced and thus dampened in different directions by means of the interconnected free ends of the circumferentially adjacent spring arms. Furthermore, the two spring arms are particularly well stabilized by the connection of their free ends, which significantly reduces the risk of individual spring arms buckling.This ensures that the free ends of the spring arms can be securely attached to the cable during intended use, which allows vibrations of the cable to be dampened particularly well.

[0012] In another possible embodiment of the invention, the two spring arms together form a polygon, in particular a square, in cross-section. Alternatively, the two spring arms, which are directly adjacent to each other and whose free ends abut each other, can form a pentagon, a hexagon, or another polygon. One of the edges of this polygon can be provided by the outer band element. This means that the spring arms, together with the outer band element, can form or enclose the polygon in cross-section. The respective corners of the polygon provide the respective predetermined bending points of the spring element. By bending the respective spring arms, the vibration of the line relative to the vehicle component can thus be particularly well dampened.

[0013] In a further possible embodiment of the invention, the spring element comprises an inner band element, which is enclosed radially outwards over its entire circumference by the outer band element and to which the free end of at least one spring arm is held. This means that the free ends of all spring arms of the spring element are held to the inner band element, thereby precisely positioning all spring arms of the spring element. By securing the respective free ends of all spring arms to the inner band element, unwanted slippage of the respective free end of the spring arm relative to the cable can be particularly well prevented during intended use. This ensures reliable damping of vibrations of the cable relative to the fastening element.This inner band element is designed to be circumferential and positioned around the cable. Specifically, the inner band element is designed to be applied to the cable along its entire circumference, thus enclosing the cable. This enclosure ensures that the cable is held securely to the fastening device. Consequently, the fastening device can maintain the cable's position relative to the vehicle component with exceptional stability, even though the cable's position within the outer band element can vary depending on deflection caused by vibrations.

[0014] In another possible embodiment of the invention, the spring element is made of an elastomer. Elastomers are dimensionally stable but elastically deformable plastics whose glass transition temperature is below room temperature. These plastics can deform under tensile and compressive stress, but then return to their original, undeformed shape. Therefore, due to its elastomer construction, the spring element can reliably and permanently dampen the vibration of the pipe.In particular, due to its elastic design, the spring element is designed to retract the line from a respective deflected deflection state during oscillation of the line to a respective initial state, which is determined by the design of the spring element, by releasing spring tension built up in the at least one spring arm during deflection.

[0015] In a further possible embodiment of the invention, the spring element has two spaced-apart through-openings, the respective central axes of which are arranged next to each other perpendicular to the axial direction. This means that the central axes are arranged next to each other at a distance from one another, and in particular, the central axes are arranged parallel to each other. A conductor can be inserted through each of these through-openings, so that the respective conductor is enclosed circumferentially by the spring element. Because the spring element has two spaced-apart through-openings, this single spring element can compensate for the vibrations of two conductors relative to the fastening element.Because the individual through-openings are spaced apart, the spring element effectively prevents the transmission of vibrations between the conductors by damping them. The spring element can include an inner band element for each through-opening, which defines the opening's boundaries. These two inner band elements allow for precise control over the dimensions and positions of each through-opening. Furthermore, the inner band elements precisely define the contact area within which the spring arm (or multiple spring arms) is positioned relative to the conductors inserted into the through-openings. This is achieved by connecting the free ends of the spring arms to the inner band elements.This allows for a particularly reliable and high damping effect of the spring element.

[0016] In a further possible embodiment of the invention, the spring element comprises several spring arms, which are arranged evenly distributed around the at least one through-opening of the spring element through which the cable can be inserted for attachment to the fastening device. This means that the several spring arms are at least substantially equidistant from other adjacent spring arms in the circumferential direction. In intended use, the spring arms of the fastening device are thus arranged at uniform intervals and therefore regularly around the cable inserted through the through-opening. This allows vibrations of the cable in different spatial directions to be reliably and particularly uniformly dampened.As a result, the transmission of vibrations to the fastening element and via the fastening element to the motor vehicle component can be particularly well prevented when used as intended.

[0017] The invention further relates to a motor vehicle, comprising a motor vehicle component and a fastening device held on the motor vehicle component, as already described in connection with the fastening device according to the invention. Here, a fastening element of the fastening device is fixed to the motor vehicle component. The motor vehicle further comprises at least one cable, which is attached to the motor vehicle component via the fastening device. The cable is inserted through an associated through-opening in the fastening device. Within this motor vehicle, the transmission of vibrations from the at least one cable to the motor vehicle component to which this cable is held via the fastening device can be particularly effectively prevented. This allows structure-borne noise generation in the motor vehicle to be kept to a minimum.

[0018] Further features of the invention may become apparent from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features shown below in the description of the figures and / or in the figures themselves, can be used not only in the combinations specified, but also in other combinations or on their own, without departing from the scope of the invention.

[0019] The drawing shows in: Fig. 1. A schematic perspective view of a fastening device with a conductor inserted through a through-hole in the fastening device; and Fig. 2a-2b respective schematic cross-sections of the fastening device, wherein the fastening device is shown in different embodiments.

[0020] In the figures, identical and functionally equivalent elements are provided with the same reference symbols.

[0021] The figures show a fastening device 10 for a line 12. The fastening device 10 is designed to attach the line 12 to a motor vehicle component. The fastening device 10 is shown in the Fig. 1 and Fig. 2a in a first embodiment and in Fig. 2b is shown in a second embodiment. In each embodiment, the fastening device 10 comprises a fastening element 14, which is designed to be fixed to the motor vehicle component. In this case, the fastening element 14 is designed as a hollow cylinder. The fastening element 14 is designed to be rigidly connected to the motor vehicle component.

[0022] The fastening device 10 further comprises a spring element 16, which in this case is arranged within the volume enclosed radially outwards by the hollow cylinder. This means that in this case, the fastening element 14 circumferentially encloses the spring element 16. When the fastening device 10 is used as intended, it is provided that the line 12 is circumferentially enclosed by the fastening device 10 over its entire circumference in a section of its length and is thus radially covered by the fastening device 10.

[0023] The radial direction R is perpendicular to the longitudinal direction or the central axis of the conduit 12. In this case, the fastening device 10 is rotationally symmetrical. Here, one central axis of the fastening device 10 coincides with the central axis of the conduit 12. An axial direction A of the fastening device 10 runs parallel to the respective central axes.

[0024] The spring element 16 surrounds a through-opening 34 radially outwards on its circumference, and in its intended use, the conduit 12 is inserted through this through-opening 34 of the spring element 16. The spring element 16 is made of an elastomer. In particular, the spring element 16 is formed in one piece. The spring element 16 is designed as a circumferential band that extends around the entire circumference of the conduit 12 in its intended use, and in particular, rests against the conduit 12. The spring element 16 comprises an outer band element 18, which is arranged radially between the conduit 12 and the fastening element 14. This means that the outer band element 18, with its outer surface 20 facing away from the conduit 12, rests against an inner surface 22 of the fastening element 14 that faces radially inwards and thus towards the conduit 12.Here, the outer surface 20 of the outer band element 18 rests against the inner surface 22 of the fastening element 14 over its entire area. This ensures that the spring element 16 is reliably supported against the fastening element 14 over its entire circumference by the outer band element 18. This means that the outer band element 18 is fixed relative to the fastening element 14.

[0025] The spring element 16 comprises at least one spring arm 26. In this case, the spring element 16 comprises a plurality of spring arms 26, each of which is connected at one end to an inner surface 28 of the outer band element 18. This inner surface 28 of the outer band element 18 faces the line 12 when used as intended. For clarity, only some of the spring arms 26 are labeled with the corresponding reference numeral. Each spring arm 26 has a free end 30 at the other end. The respective spring arms 26 are designed to be rigidly connected to the line 12 at their free end 30, thereby effectively limiting, and in particular preventing, the transmission of vibrations from the line 12 to the fastening element 14 or to the motor vehicle component rigidly connected to the fastening element 14 by means of the build-up and release of spring tension in the respective spring arms 26.To effectively suppress vibration transmission from the line 12 to the fastening element 14, each of the spring arms 26 has at least one deflection 32. The deflection 32 is a section of the respective spring arm 26 where the longitudinal direction changes. In this case, the respective spring arms 26 can have a kink in the area of ​​the deflection 32. This kink is a predetermined bending point where the spring arm 26 can bend to compensate for any deflection of the line 12 relative to the outer band element 18 and thus relative to the fastening element 14. This effectively suppresses or limits vibration transmission from the line 12 to the fastening element 14.

[0026] In the embodiments shown in the figures, two spring arms 26, arranged directly adjacent to each other in the circumferential direction U, are arranged and designed in a mirror-symmetrical manner with respect to an axis extending in the radial direction R. Thus, these spring arms 26, directly adjacent to each other in the circumferential direction U, are configured to buckle in opposite directions in the circumferential direction U under load. Furthermore, it is provided that these two mirror-symmetrical spring arms 26 abut each other at their respective free ends 30, and are in particular connected to each other. This allows the free ends 30 to be jointly applied to the conduit 12.In particular, the spring arms 26 can stabilize each other due to their mirror-symmetrical design when their free ends 30 are in contact, since the spring arms 26 are designed to bend in different directions relative to each other in the circumferential direction U. The free ends 30 of the respective spring arms 26, held together, are thus positioned particularly securely and precisely relative to the line 12.

[0027] During the Fig. 1 and Fig. In the first embodiment shown in 2a, it is provided that the spring arms 26, which are arranged directly adjacent to each other in the circumferential direction U, in addition to bearing against each other at their free ends 30, also bear against each other at their other end associated with the fastening element 14. As in Fig. 2a, which can be particularly well recognized, results in a closed polygonal, in this case rectangular, in particular square, cross-section of the respective two spring arms 26 that are directly adjacent to each other in the circumferential direction, wherein the cross-section runs perpendicular to the axial direction A. In the case of the Fig.In the second embodiment shown in Figure 2b, the further ends of the spring arms 26, which are directly adjacent to each other in the circumferential direction U and are connected to each other at their free ends 30, and which are associated with the fastening element 14, are held at a distance from each other on the outer band element 18. This effectively prevents undesired buckling of the spring arms 26 in the circumferential direction U and provides particularly good stabilization of the spring elements 16 in their position. As a result, the spring arms 26, which are directly adjacent to each other in the circumferential direction U and are connected to each other at their free ends 30, together with the outer band element 18, form a cross-section that is at least substantially pentagonal in the plane perpendicular to the axial direction A.

[0028] In an embodiment not shown in the figures, the spring element 16 can additionally comprise an inner band element, which is enclosed radially outwards over its entire circumference by the outer band element 18 and to which the free ends 30 of the spring arms 26 are held. This inner band element radially outwards defines the circumferential boundary of the passage opening 34. The inner band element is thus designed to be applied to the outer circumference of the conduit 12.

[0029] It is possible that the spring element 16 has several spaced-apart through-openings 34, into each of which a line 12 can be inserted. It is provided that the several through-openings 34 are aligned parallel to each other with their respective central axes. In particular, it is further provided that the through-openings 34 are arranged next to each other in the radial direction. It is further provided that each of the through-openings 34 is circumferentially bounded by the spring element 16.

[0030] Line 12 may be a high-voltage line, a coolant line, or a refrigerant line of the motor vehicle containing the motor vehicle component.

[0031] Overall, the invention shows how an acoustic decoupling element, in this case the fastening device 10, for coolant lines and thus the line 12 can be designed. Reference symbol list 10 Mounting device 12 Line 14 Fastening element 16 spring element 18 outer band element 20 Outside 22 Inside 26 spring arm 28 Inside 30 free end 32 Deflection 34 Passage opening A axial direction R radial direction U circumferential direction QUOTES INCLUDED IN THE DESCRIPTION

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

[0000] DE 10 2014 109 270 A1

[0002] EP 1 493 954 B1

[0003]

Claims

[1] Fastening device (10) for at least one line (12) to a motor vehicle component, comprising a fastening element (14) which is designed to be fastened to the motor vehicle component, and comprising a spring element (16) supported on the fastening element (14) and designed to hold the at least one line (12) by encompassing the line (12) circumferentially, wherein the spring element (16) comprises at least one spring arm (26) which is supported at one end against the fastening element (14) and is designed to support the line (12) with its free end (30) at the other end in order to dampen vibrations of the line (12) relative to the fastening element (14), wherein the spring arm (26) has at least one deflection (32) along its longitudinal direction from its end assigned to the fastening element (14) to its free end (30). [2] Fastening device (10) according to claim 1, characterized bythat the spring element (16) is designed as a circumferential band which can enclose the line (12) on the circumferential side, with an outer band element (18) which is radially supported on the outer circumference on the fastening element (14) and from which the at least one spring arm (26) projects radially inwards. [3] Fastening device (10) according to claim 2, characterized by that several spring arms (26) project radially inwards from the outer band element (18). [4] Fastening device (10) according to claim 3, characterized by that two spring arms (26) directly adjacent to one another in the circumferential direction (U) abut one another with their free end (30). [5] Fastening device (10) according to claim 4, characterized by that the two spring arms (26) together form a polygon, in particular a square, in cross-section. [6] Fastening device (10) according to one of claims 2 to 5, characterized bythat the spring element (16) has an inner band element which is enclosed radially outwardly over its entire circumference by the outer band element (18) and on which the free end (30) of the at least one spring arm (26) is held. [7] Fastening device (10) according to one of the preceding claims, characterized by that the spring element (16) is formed from an elastomer. [8] Fastening device (10) according to one of the preceding claims, characterized by that the spring element (16) has two through openings (34) spaced apart from one another, the respective central axes of which are arranged next to one another perpendicular to the axial direction and through which a line (12) can be inserted in each case, whereby the respective line (12) is enclosed circumferentially by the spring element (16). [9] Fastening device (10) according to one of the preceding claims, characterized bythat the spring element (16) comprises a plurality of spring arms (26) which are arranged uniformly distributed around a through-opening (34) of the spring element (16), through which the line (12) can be inserted for holding on to the fastening device (10). [10] Motor vehicle, comprising a motor vehicle component, a fastening device (10) held on the motor vehicle component according to one of the preceding claims and comprising a line (12) which is fastened to the motor vehicle component via the fastening device (10).

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