Cable feedthrough for a motor vehicle, method for producing a cable feedthrough, and motor vehicle
The cable gland design with a high-density stiffening component and gap formation addresses noise insulation and cable guidance issues, achieving enhanced soundproofing and structural integrity through partition walls.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- AFT AUTOMOTIVE
- Filing Date
- 2026-01-12
- Publication Date
- 2026-07-23
AI Technical Summary
Existing cable glands for motor vehicles fail to provide effective noise insulation through partition walls, allowing sound to propagate through recesses where cables or pipes pass, and may not ensure reliable cable guidance and rigidity.
A cable gland design featuring a support component with a stiffening component of higher density, spaced apart from a sealing component to create a gap, and a contact surface for the partition wall, ensuring sound insulation by decoupling the support component from the wall and using a stiffening component to enhance soundproofing.
The design achieves significant sound insulation, reducing sound transmission by up to 11.5 dB compared to existing solutions, while maintaining reliable cable guidance and rigidity.
Smart Images
Figure EP2026050605_23072026_PF_FP_ABST
Abstract
Description
[0001] DESCRIPTION
[0002] Pipe penetration for a motor vehicle, method for producing a pipe penetration and motor vehicle
[0003] The invention relates to a cable gland for arrangement on a partition wall of a motor vehicle, comprising a support component made of a support component material, on which at least one gland opening is formed, and a sealing component made of a sealing component material that overlaps the support component and is penetrated by the at least one gland opening. The invention further relates to a method for manufacturing a cable gland and to a motor vehicle.
[0004] For example, US patent 5,736,677 is known from the prior art. This patent describes a nozzle that can be passed through and held by a hole formed in a plate, the nozzle comprising: a nozzle section made of an elastic material, wherein the nozzle section has a large-diameter section having a ribbed section and a small-diameter section, and wherein the nozzle section has an opening that penetrates the large-diameter section and the small-diameter section; and a silencer comprising: a noise-insulating section made of a hard noise-insulating material, wherein a front end section of the noise-insulating section can be inserted into the opening in the large-diameter section;a recessed section that engages in the rib section and is formed on the noise-insulating section; a noise-absorbing section made of a soft noise-absorbing material, wherein the noise-insulating section and the noise-absorbing section are formed in one piece; and a wire entry hole that penetrates the noise-insulating section and the noise-absorbing section.
[0005] Furthermore, US 9,812,852 B2 discloses a grommet attached to a wiring harness intended to be inserted through an opening in a vehicle panel, and which is then fitted and mounted in the opening so that the wiring harness is held in the vehicle panel, the grommet comprising: a panel mounting section that is fitted in the opening in the vehicle panel, circumferential walls that cover the perimeter of the wiring harness to form a sound-insulating space around the wiring harness;and soundproof walls formed within the sound insulation space such that they intersect a longitudinal direction of the cable harness, the soundproof walls having through-holes that are penetrated by the cable harness, and the cable harness and the through-holes being brought into close contact with each other, and an outer perimeter of the soundproof walls and the through-holes being arranged on an inner perimeter side of the plate mounting section.
[0006] The object of the invention is to propose a cable gland for arrangement on a partition wall of a motor vehicle which has advantages over known cable glands, in particular providing particularly effective noise insulation in order to reduce sound propagation through a recess produced in the partition wall and at least partially closed by the cable gland.
[0007] According to the invention, this is achieved with a cable gland for arrangement on a partition wall of a motor vehicle with the features of claim 1. It is provided that, on the one hand, the sealing component and the support component are spaced apart from each other in certain areas to form a gap, and on the other hand, the sealing component has a contact surface for contact with the partition wall, in particular the area where the support component is positioned away from the partition wall, wherein a stiffening component made of a stiffening component material that is different from the support component material and has a higher density than the latter is arranged on the support component.
[0008] Advantageous embodiments with expedient further developments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments described in the description are not limiting; rather, any variations of the features disclosed in the description, the claims, and the figures are possible.
[0009] The cable gland is preferably an integral part of the motor vehicle, but can of course also be separate from it, particularly until it is mounted on and / or in the vehicle. The cable gland is a component designed and configured for installation on the vehicle's bulkhead. A bulkhead is a wall that separates two compartments of the vehicle. For example, the bulkhead might be a wall separating the vehicle's engine compartment from the vehicle's interior. The vehicle's interior could be, for example, the passenger compartment or passenger cell. It is also possible that the interior consists of the passenger compartment and the vehicle's trunk.The passenger compartment is designed and equipped to accommodate at least one person, such as the driver of the vehicle. Accordingly, at least one seat or bench seat is provided in the passenger compartment. The wall between the passenger compartment and the engine compartment is also referred to as the bulkhead or firewall.
[0010] For example, the partition wall consists of a load-bearing layer to which sound insulation is attached, which in turn is composed of one or more layers. The load-bearing layer is preferably made of metal, whereas the sound insulation consists of a material or materials that have a lower stiffness than the material of the load-bearing layer. The sound insulation at least partially prevents sound transmission between the rooms via the partition wall. Since it is usually necessary to run a pipe or cable from one room to the other, a recess must be provided in the partition wall through which the pipe or cable passes. However, this interrupts the sound-insulating effect of the partition wall, so that sound is transmitted between the rooms through the recess.
[0011] For this reason, the recess is at least partially, preferably completely, closed with the cable gland. The cable gland serves to provide sound insulation as the cable passes through the partition. The cable can be of any type; for example, it could be an electrical cable or the like. However, it is particularly preferred that the cable be a fluid line, thus serving to transport a fluid, at least temporarily. The fluid could be, for example, a coolant or refrigerant from an air conditioning system. Whenever the cable gland is mentioned in this description, it is not necessary that the cable actually passes continuously through the recess in the partition using this component. It is also possible for the cable to be connected to the cable gland at both ends, so that the cable gland itself forms part of the cable.This is particularly the case when the line is designed as a fluid line. Here, a first part of the fluid line and a second part are fluidically connected to the pipe penetration, so that the two parts of the fluid line are fluidically connected to each other via the pipe penetration. In this description, "on the one hand" means that something is located on a first side; similarly, "on the other hand" means that something is located on a second side that differs from the first. The first and second sides are usually located on opposite sides of a component or device.Therefore, when it is stated that a first part of the fluid line and a second part of the fluid line are fluidically connected to the pipe penetration, the first part of the fluid line is connected to the first side of the pipe penetration, and the second part of the fluid line is connected to the second side of the pipe penetration, opposite the first side. Preferably, the first and second sides are opposite each other with respect to an imaginary plane that is perpendicular to an axis and runs through the component or device. The axis is, for example, the longitudinal center axis of the pipe penetration and / or the longitudinal center axis of the supporting component.
[0012] The cable penetration is designed to at least partially prevent sound from passing through the opening in the partition. At the same time, it should ensure reliable cable guidance, meaning it must be sufficiently rigid to prevent the cable connected to the penetration from deforming the penetration or displacing the cable in a way that could impair the function of the penetration or the cable. The cable penetration generally comprises a support component and a sealing component. The sealing component overlaps the support component at least partially, preferably completely. It serves to close the opening in the partition; in particular, the sealing component rests against the partition all the way around to seal the opening.The sealing component preferably consists entirely of the sealing component material, in particular it is made entirely and continuously of the sealing component material.
[0013] The support component is designed and configured to ensure the dimensional stability of the pipe penetration, particularly the sealing component, thus counteracting deformation by increasing its stiffness. For this purpose, the support component is preferably made of a material with higher stiffness than the sealing component material. The support component is preferably made entirely of this material; that is, it is manufactured completely and continuously from this material. The feedthrough, which serves to guide the pipe, is located on the support component. The feedthrough is hollow and serves either to accommodate one or more pipes or to connect two pipe sections in a flow-optimized manner. For this purpose, the feedthrough extends beyond the support component on both sides.At least on one side of the supporting component, it penetrates the sealing component, so that the feedthrough is accessible from the respective room on both sides of the supporting component or on both sides of the partition wall.
[0014] Any number of penetrations can be present on the supporting component; for example, just a single penetration or several penetrations. Whenever this description refers to a penetration or at least one penetration, the explanations are always equivalent. Explanations concerning a penetration are therefore applicable to at least one penetration, and vice versa. If several penetrations are present, the explanations preferably apply to each of them.
[0015] To improve the sound insulation of the pipe penetration, the sealing element and the supporting element are spaced apart on one side of the supporting element, creating a gap between them. This means that the gap between the sealing element and the supporting element, and thus the space, is only present on one side of the supporting element. The space can be a cavity, for example, filled with a fluid such as a gas or liquid, but not with a solid. For instance, the space might be designed as an air space and therefore completely filled with air. Alternatively, an additional component could be located within the space, filling it at least partially, partially, or completely.This component is, for example, in the form of a damping element.
[0016] The space between the support components and the sealing components is completely enclosed, thus fluidically separating it from the external environment of the pipe penetration. However, it is not necessary for the space between the support components and the sealing components to be fluidically sealed. It is perfectly acceptable for fluid to flow from the space to the external environment, or vice versa, through a gap between the support components and the sealing components. This space already provides excellent sound insulation. On the other side of the support component, i.e., on the side facing away from the space between the support components, the sealing component forms the contact surface.This means that the sealing element is present on both sides of the support element, in order to limit the gap on one side of the support element and to create the contact surface on the other side. Preferably, this means that the support element is positioned between the gap and the contact surface along an axis running through it, in particular the longitudinal center axis of the pipe penetration and / or the longitudinal center axis of the support element. Accordingly, the gap is created by spacing the support element and the sealing element on a first side of the support element, and the contact surface is arranged on a second side of the support element opposite the first side.
[0017] The contact surface serves to connect the cable penetration to the partition wall. Specifically, the contact surface is designed such that, when the cable penetration is installed as intended, it rests continuously and without interruption against the partition wall, particularly at an edge defining the partition wall recess. The sealing component forms the contact surface at a distance from the supporting component, so that after the cable penetration is installed as intended, the supporting component is positioned at a distance from the partition wall, particularly in the axial direction with respect to a longitudinal center axis of the cable penetration and / or a longitudinal center axis of the supporting component. At least in certain areas, the supporting component is thus kept at a distance from the partition wall by means of the sealing component. This acoustically decouples the supporting component from the partition wall, ensuring good sound insulation for the cable penetration.
[0018] Despite the measures already mentioned, it may happen that the cable penetration does not provide sufficient sound insulation across a desired frequency range. The frequency range here refers specifically to frequencies perceptible to a vehicle user. Perception can occur in any way; for example, it may be through the user's sense of hearing. Therefore, the sound insulation of the cable penetration should be further improved. It has been shown that this can be achieved using a stiffening component attached to the support component. The stiffening component is attached to the support component, specifically, it is fastened to the support component, for example, by a positive fit and / or a material bond.The stiffening component is designed to improve the overall sound insulation of the pipe penetration, thus reducing sound transmission between rooms. For this purpose, it consists of a stiffening component material that differs from the supporting component material. More precisely, the stiffening component material has a higher density than the supporting component material. This higher density results in effective sound insulation of the stiffening component, preventing or at least hindering sound transmission between rooms. Preferably, the stiffening component is made entirely of the stiffening component material; that is, it is manufactured completely and continuously from this material. With this design of the pipe penetration, good sound insulation is achieved.
[0019] Sound insulation is described, for example, by the sound insulation rating R, which is derived in particular from a logarithmic ratio between the sound intensities present in the rooms, i.e., between the intensity of the sound present at one end of the pipe penetration and the intensity of the sound present at the other end. The sound insulation rating can therefore be determined using the following relationship:
[0020] R= 10 • logio( / i / ü)
[0021] to be determined, where h is the sound intensity of the sound on a sound-emitting side of the cable penetration and h is the sound intensity of the sound on a sound-receiving side of the cable penetration. For a solid partition wall, this can be approximated using the relationship
[0022] R = 20 • logio(m -f) - 47
[0023] The sound insulation value is estimated in decibels, where m is the surface mass of the partition in kg / m². 2and f is the frequency of the sound in Hz. The surface mass can be determined using the relationship
[0024] m = p • d, where p is the density of the material in kg / m³ 3 and d is the thickness of the partition in meters. If the basis weight is doubled, the approximation can be...
[0025] Rneu - Ralt = 20 • logl0(2) ~ 6 dB
[0026] A significant reduction in sound level of 6 dB can be achieved.
[0027] Below are some examples for a sound frequency of 1 kHz: For a layer of ethylene propylene diene monomer rubber (EPDM) with a material thickness of 3 mm, the following results at a density of 1,200 kg / m³ 3 an average surface mass of 3.6 kg / m² 2 This yields a sound insulation value of R = 24.1 dB. The same layer of polyamide PA66 has a density of 1,140 kg / m³. 3It has a sound insulation rating of R = 23.7 dB; the layer consists of PA66 GF30 and has a density of 1,340 kg / m³. 3 and a sound insulation rating of R = 25.1 dB.
[0028] In a multi-layered structure, as is preferably the case according to the invention, since the stiffening component is arranged within the supporting component, three layers are present when using PA66 for the supporting component and stainless steel for the stiffening component: a first layer of PA66 with a thickness of 1 mm, a second layer of stainless steel with a thickness of 1 mm, and a third layer of PA66 with a thickness of 1 mm. The density of PA66 is 1,140 kg / m³. 3 , made of stainless steel 7,900 kg / m 3 .
[0029] For the three-layer structure of the supporting component with stiffening element, the average density is 3,393 kg / m³ and the average mass per unit area is 10.18 kg / m². This results in a sound insulation rating of R = 33.2 dB, and thus a sound reduction of 9 dB compared to the ethylene propylene diene monomer (EPDM) rubber layer. Using layer thicknesses of 0.75 mm for the first and third PA66 layers and a layer thickness of 1.5 mm for the second stainless steel layer, the average density is 4,520 kg / m³ and the average mass per unit area is 13.56 kg / m². This results in a sound insulation rating of R = 35.6 dB, and thus a sound reduction of 11.5 dB compared to the EPSDM rubber layer.
[0030] A further development of the invention provides that the stiffening component is attached to the supporting component and / or at least partially embedded within the supporting component. To significantly improve the sound-insulating properties of the supporting component, the stiffening component is attached to the supporting component, i.e., fixed at least partially with respect to the supporting component. The attachment can be, for example, positive locking and / or material locking. Positive locking of the stiffening component to the supporting component is preferably achieved by arranging the stiffening component within the supporting component. In such a configuration, the supporting component is embedded at least partially within the supporting component, in particular, encompassed by the supporting component.
[0031] Preferably, the stiffening component is arranged completely within the supporting component, meaning it is entirely enclosed or covered on all sides by the supporting component. The stiffening component is fixed within the supporting component, and its placement within the supporting component is such that a positive-locking connection is established between the stiffening component and the supporting component. The described cable penetration achieves particularly effective sound insulation.
[0032] A further development of the invention provides that the stiffening component has one or more recesses to adjust its stiffness. The stiffness at least partially determines the effectiveness of the stiffening component with regard to sound insulation. To achieve a defined level of sound insulation for specific frequencies, the recess or recesses are provided in the stiffening component. The recesses are preferably edge-closed, meaning they each have a continuous edge. The recesses are also particularly preferably through-holes, meaning they extend completely through the stiffening component in one direction. Alternatively, the recesses can also be in the form of depressions or blind openings that only partially extend through the stiffening component and are each bounded by a base. The described method allows for particularly easy adjustment of the desired sound insulation.
[0033] A further development of the invention provides that the stiffening component has dimensions in a first direction that correspond at most to a first fraction of the dimensions of a, in particular planar, base body of the support component in the same first direction, and / or has dimensions in a second direction different from the first direction that correspond to at least a second fraction of the dimensions of the base body of the support component in the same second direction. The stiffening component and the support component each have first dimensions in the first direction and second dimensions in the second direction.
[0034] The first and second directions are angled relative to each other, thus forming an angle greater than 0° and less than 180°. Preferably, the angle is at least 60° and at most 120°, at least 75° and at most 105°, or approximately or exactly 90°. Preferably, a third direction is angled relative to both the first and second directions, thus preferably forming one of the aforementioned angles with each of them. In particular, the first, second, and third directions together define a Cartesian coordinate system.
[0035] The first direction runs, for example, parallel to a longitudinal center axis of the cable penetration, in particular of the support component and / or the penetration nozzle. The base body of the support component is understood to be a preferably planar body, which is therefore bounded on opposite sides by planar surfaces. For example, the base body is cylindrical, in particular circular cylindrical. The second and third directions, when the cable penetration is installed on the partition wall as intended, extend in particular parallel to the partition wall.
[0036] In the first direction, the stiffening component has a comparatively small material thickness and is thinner than the base body. The material thickness of the stiffening component in the first direction is therefore smaller than the dimensions of the base body in the first direction. For example, the stiffening component is a plate or sheet. In the second and / or third direction, the stiffening component has larger dimensions than in the first direction. For example, the dimensions of the stiffening component in the second and / or third direction are each larger by a factor of at least 50, at least 100, or at least 200 than its dimensions in the first direction.
[0037] This ultimately means that the stiffening component has dimensions in the first direction that are smaller than the dimensions of the main body of the support component in the same first direction. A ratio of the dimensions of the stiffening component in the first direction to the dimensions of the main body in the first direction is referred to as the first component. A second component is the ratio of the dimensions of the stiffening component in the second direction to the dimensions of the main body in the second direction, and a third component is the ratio of the dimensions of the stiffening component in the third direction to the dimensions of the main body in the third direction. Preferably, the first component is smaller than the second component and / or the third component.For example, the first component is at most 50%, at most 25%, or at most 10%, whereas the second and / or third component each correspond to at least 50%, at least 60%, at least 75%, or at least 90%, respectively. With such a design of the cable penetration, good sound insulation is achieved.
[0038] A further development of the invention provides that the sealing component encompasses an outer edge of the support component, and the support component is designed such that, when the pipe penetration is arranged as intended at the partition, a further gap exists between the support component and the partition. The support component has an outer edge that is continuous in the circumferential direction with respect to the longitudinal center axis of the support component. The sealing component encompasses the outer edge, preferably also continuously and without interruption in the circumferential direction. In other words, the sealing component has an edge recess in which the outer edge of the support component is arranged, in particular at least partially in a form-fitting manner.
[0039] By encircling the outer edge, the sealing component forms the contact surface on the side of the support component facing the partition wall. This surface provides support for the pipe penetration when properly installed against the partition wall. The support component is arranged and designed such that it, or at least its base body, is axially spaced from the partition wall with respect to its longitudinal center axis, i.e., spaced from the partition wall by means of the sealing component. This creates an additional space, viewed axially, between the support component and the partition wall, which is connected via the recess to one of the spaces separated by the partition wall. The spaced arrangement of the support component, or at least its base body, decouples it from the partition wall, thus achieving good sound insulation.
[0040] A further development of the invention provides that the contact surface is formed by elastic sealing ribs extending from the sealing component in the direction away from the supporting component. The sealing ribs are preferably integral and made of the same material as the sealing component, i.e., they consist of the same material as the sealing component. Preferably, each sealing rib is continuous and uninterrupted in the circumferential direction, meaning that, when the pipe penetration is arranged as intended, it rests continuously and uninterrupted against the partition. The sealing ribs are preferably spaced apart in longitudinal section, particularly parallel to one another. The sealing ribs provide a sound-insulating connection between the pipe penetration and the partition, thus reducing the transmission of structure-borne noise.
[0041] A further development of the invention provides that the support component is a plastic, in particular polyamide, or a composite material with a plastic matrix, and / or the stiffening component material is a metal, in particular stainless steel. The support component thus consists, for example, of a plastic, preferably polyamide (PA), polypropylene (PP), or polyphthalamide (PPA). Alternatively, it consists of the composite material, which has a plastic matrix in which a reinforcing material is embedded. Reinforcing fibers, in particular glass fibers, carbon fibers, aramid fibers, or the like, are used as the reinforcing material. When using reinforcing fibers, the composite material can also be referred to as a fiber composite material. The base material matrix preferably consists of polyamide, polypropylene, or polyphthalamide, or at least comprises polyamide, polypropylene, or polyphthalamide.Additionally or alternatively, metal is used as a stiffening component material. Compared to plastic, it has a higher density, resulting in good sound insulation. Steel or stainless steel is particularly suitable as the metal used.
[0042] A further development of the invention provides that the sealing component is penetrated by at least one mounting sleeve, which is designed and configured to receive a fastening element for securing the pipe penetration to the partition. The mounting sleeve serves to connect the sealing component or the pipe penetration as a whole to the partition. The mounting sleeve is designed and configured to receive the fastening element. For example, the mounting sleeve has a through-hole. It can be provided that the mounting sleeve has a cylindrical base body from which a retaining collar extends, which rests against the sealing component or is embedded in the sealing component.
[0043] A screw, bolt, rivet, or similar fastener is used, for example. In any case, the fastening sleeve is positively connected to the partition wall by means of the fastener when the cable gland is mounted to the partition. The fastening sleeve is connected to the sealing component and subsequently holds the sealing component relative to the partition wall. The fastening sleeve may be attached to the supporting component to achieve a particularly rigid connection. The fastening sleeve is preferably made of metal, especially steel or stainless steel, to ensure a particularly reliable fastening of the cable gland to the partition wall.
[0044] A further development of the invention provides that the at least one fastening sleeve is attached to the support component, in particular a cantilever of the support component, and / or to the stiffening component, and / or is formed by the stiffening component. The possible attachment of the fastening sleeve to the support component has already been mentioned. This allows for particularly high stiffness and good sound insulation. In principle, any number of such fastening sleeves can be used, i.e., just one or several fastening sleeves.
[0045] Preferably, the mounting sleeve is attached to the extension of the support component, which extends from the base body of the support component. For example, several such extensions are provided, spaced apart from one another on the base body of the support component. The extensions are preferably integrally formed with the base body and / or made of the same material. Preferably, a mounting sleeve is arranged in each of the extensions.
[0046] Additionally or alternatively, the mounting sleeve is attached to the stiffening component or it is formed by the stiffening component. In this case, the stiffening component is not merely connected indirectly to the mounting sleeve and thus to the partition wall via the supporting component, but rather the stiffening component directly engages the mounting sleeve or even forms it. This results in a particularly rigid connection of the stiffening component to the partition wall, thus providing good sound insulation.
[0047] A further development of the invention provides that the mounting sleeve is encompassed by an annular web of the support component, which projects beyond the base body and / or the extension of the support component in at least one direction. The annular web forms a cylindrical recess in the support component in which the mounting sleeve is arranged. The annular web preferably completely encloses the mounting sleeve and bears continuous and uninterrupted contact with the mounting sleeve. For example, the mounting sleeve is pressed into the recess of the support component and thus held in it by friction. Such a design enables a reliable connection of the cable gland to the partition wall.
[0048] A further development of the invention provides that the sealing component has a recess bounded by a continuous recess edge, which is penetrated by the feedthrough fitting, the recess edge being in continuous contact with the feedthrough fitting. The feedthrough fitting extends axially through the sealing component, more precisely, it extends through the recess formed in the sealing component. The feedthrough fitting projects beyond the sealing component on the side facing away from the support component. The recess in which the feedthrough fitting is arranged is bounded by the continuous recess edge; the recess is thus a closed recess. To achieve good sound insulation of the pipe penetration, the recess edge is in continuous contact with the feedthrough fitting, in particular, uninterrupted in the circumferential direction with respect to the longitudinal center axis.This at least partially prevents the propagation of sound along the feedthrough.
[0049] A further development of the invention provides that the feedthrough fitting has a retaining rib against which the recess edge rests, and / or has several retaining ribs between which the recess edge is arranged. The retaining rib is preferably an annular rib, or the retaining ribs are annular ribs. The retaining rib(s) are thus continuous and uninterrupted in the circumferential direction. However, an interrupted design of the retaining rib(s) is also possible. In this case, the retaining rib, or at least one or more of the retaining ribs, has an interruption. The retaining rib(s) serve to provide a sound-insulating connection of the sealing component to the feedthrough fitting. For this purpose, the recess edge of the sealing component rests against the retaining rib; preferably, it is attached to the retaining rib, for example, by a material bond.Additionally or alternatively, the recess edge is located between the two retaining webs; in particular, it is positively engaged between the two retaining webs, preferably clamped. Viewed axially, the recess edge rests against a first retaining web on one side and a second retaining web on the other. This reliably prevents sound from passing through the recess. A further development of the invention provides that a damping element made of a damping element material is arranged in the space between the two webs, in particular completely filling the sealing component in an imaginary plane so that it rests against the sealing component all around. The damping element serves to achieve a sound damping effect in the space between the two webs, i.e., to reduce sound energy in the space between the two webs. The damping element material is selected accordingly for this purpose.Preferably, the damping element consists entirely and continuously of the damping element material. For example, a foam, preferably a foamed plastic, is used as the damping element material. Alternatively, the damping element can also consist of a nonwoven fabric.
[0050] The damping element is preferably dimensioned such that it completely fills the gap in the imaginary plane, i.e., that it continuously rests against an inner circumferential surface of the sealing component in the plane with an outer circumferential surface. Particularly preferably, however, the damping element only partially fills the gap in a direction perpendicular to the plane. For example, the damping element rests against the supporting component on one side and is also arranged at least partially spaced away from the sealing component on the other, so that a portion of the gap remains in which the damping element is not located, and this portion exists as a cavity. The damping element can further improve the sound insulation of the pipe penetration.
[0051] A further development of the invention provides that the feedthrough fitting is a fluid feedthrough fitting and has connections for fluid lines, in particular pipes and / or hoses, on opposite sides. The fluid feedthrough fitting serves to establish a flow-related connection between the fluid lines or the fluid line sections of the fluid line. Accordingly, it has the connections for the fluid lines on opposite sides. For example, at least one of the connections has a hose barb or a fir-tree profile for pushing on a hose. It can also be provided that at least one of the connections is designed as a pipe fitting, in particular as a VDA fitting or as an SAE fitting.The described design of the pipe penetration enables a sound-insulating connection of two fluid lines that are arranged on opposite sides of the partition. The invention further relates to a method for manufacturing a pipe penetration, in particular a pipe penetration according to the explanations in this description, wherein the pipe penetration has a support component made of a support component material, on which at least one penetration nozzle is formed, and a sealing component made of a sealing component material that overlaps the support component and is penetrated by the at least one penetration nozzle.It is provided that, on the one hand, the sealing component and the supporting component are spaced apart from each other in certain areas to form a gap, and on the other hand, the sealing component has a contact surface for contact with the partition wall, in particular where the supporting component is positioned away from the partition wall, and that a stiffening component made of a stiffening component material that is different from the supporting component material and has a higher density is arranged on the supporting component.
[0052] The advantages of such a procedure or such a design of the cable entry have already been mentioned. Both the cable entry and the method for its construction can be further developed as explained in this description, and reference is made to these explanations in that regard.
[0053] Preferably, the support component and the stiffening component are provided first, and the stiffening component is arranged on and / or in the support component. Preferably, the support component is manufactured by injection molding, with the stiffening component being arranged within the support component during the injection molding process, i.e., being overmolded with the support component material. Optionally, the damping element is then arranged on the support component; in particular, the feedthrough extending from the support component is positioned so that it passes through a recess in the damping element. Finally, the sealing component is connected to the support component, with the feedthrough again being positioned in the recess of the sealing component, so that the feedthrough extends through the sealing component.It is preferably intended that the mounting sleeve or several mounting sleeves be arranged on the sealing component. Overall, the described method results in a simple assembly of the pipe penetration.
[0054] The invention further relates to a motor vehicle with a partition wall and a cable gland for arrangement on the partition wall, in particular a cable gland as described in the explanations within this description, wherein there is an opening in the partition wall which is closed off by the cable gland, in particular by the cable gland, wherein the cable gland has a support component made of a support component material on which at least one gland is formed, and a sealing component made of a sealing component material which overlaps the support component and is penetrated by the at least one gland.
[0055] It is provided that, on the one hand, the sealing component and the support component are spaced apart from each other in certain areas to form a gap, and on the other hand, the sealing component has a contact surface for contact with the partition wall, particularly where the support component is positioned away from the partition wall. A stiffening material made of a different material and with a higher density than the support component material is arranged on the support component. For further information regarding the advantages and possible beneficial developments of the vehicle and the pipe penetration, please refer to the explanations provided in this description.
[0056] The features and combinations of features described in the description, in particular those described in the following figure description and / or shown in the figures, are not only usable in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention, in particular the scope of the claims. Thus, embodiments that are not explicitly shown or explained in the description and / or the figures, but which emerge from or can be derived from the explained embodiments, particularly within the scope of the claims, are also to be considered as encompassed by the invention.
[0057] The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing, without limiting the invention. The drawing shows:
[0058] Figure 1 shows a schematic representation of a cable gland for installation on a partition wall of a motor vehicle; Figure 2 shows a schematic representation of the cable gland during a first assembly step.
[0059] Figure 3 shows a schematic representation of the cable routing during a second assembly step.
[0060] Figure 4 shows a schematic representation of the cable routing during a third assembly step, as well as
[0061] Figure 5 shows a schematic representation of the cable routing after completed assembly.
[0062] Figure 1 shows a schematic representation of a cable gland 1, designed and configured for installation on a partition wall 2 of a motor vehicle (only indicated here). An opening 3 is provided in the partition wall 2, through which a cable is to be routed. To at least partially prevent the transmission of sound through the opening 3, the cable gland 1 is arranged such that it overlaps the opening 3 and, in particular, completely seals it.
[0063] The pipe penetration 1 has a support component 4 to which a stiffening component 5 is attached. In the illustrated embodiment, the stiffening component 5 is embedded in the support component 4 and is thus completely enclosed by it. The support component 4 consists of a support component material, and the stiffening component 5 consists of a stiffening component material. The stiffening component material is selected such that it has a higher density than the support component material; for example, the density of the stiffening component material is greater by a factor of at least 1.5, at least 2.0, or at least 2.5 than the density of the support component material. Preferably, the density of the stiffening component material is greater by a factor of at least 3, at least 4, or at least 5 than the density of the support component material.
[0064] The support component 4 has a base body 6, which is cylindrical in shape. Several arms 7 extend from the base body 6 and are designed and intended for attaching the cable gland 1 to the partition wall 2. In particular, fastening sleeves 8 are attached to the arms 7, for example, by arranging the fastening sleeves 8 in recesses in the arms 7. The fastening sleeves 8 each have, for example, a cylindrical base body 9 and a retaining collar 10 that surrounds the base body 9.
[0065] The base body 9 preferably rests radially against the extension arm 7 with respect to a longitudinal center axis 11 of the cable gland 1 or a feedthrough nozzle 12 of the cable gland 1. In the axial direction, the retaining collar 10 is spaced apart from the extension arm 7. In the illustrated embodiment, a sealing component 13 is located axially between the extension arm 7 and the retaining collar 10. The mounting sleeves 8 serve to receive fasteners, for example, screws, which are used to attach the cable gland 1 to the partition 2.
[0066] The feedthrough fitting 12 is integrated into the support component 4; in particular, it is manufactured integrally and of the same material as the support component 4, especially its base body 6. It can be seen that the stiffening component 5 is a perforated disc and has at least one recess for the feedthrough fitting 12, which provides a continuous and uninterrupted connection. The feedthrough fitting 12 projects axially beyond the support component 4 on opposite sides, so that a connection 14 or 15 is provided on each side. The connections 14 and 15 are designed and configured for connecting fluid lines to the feedthrough fitting 12, with the feedthrough fitting 12 fluidically connecting the fluid lines after they are connected. For example, connection 14 is designed as a hose connection and connection 15 as a pipe connection.
[0067] The feedthrough liner 12 extends axially through the sealing component 13. For this purpose, a recess 16 is formed in the sealing component 13, through which the feedthrough liner 12 extends. Retaining webs 17 are formed on the feedthrough liner 12, between which the sealing component 13 engages with an edge that defines the recess 16. For example, the edge rests axially against one of the retaining webs 17, and in particular, it is attached to it.
[0068] The sealing element 13 completely overlaps the support element 4. In particular, it encompasses at least a majority or even completely an outer edge 18 in the circumferential direction. Accordingly, the sealing element 13 is located on opposite sides of the support element 4 when viewed axially. On one side of the support element 4, the sealing element 13 is spaced at least partially away from the support element 4, so that a gap 19 exists between the support element 4 and the sealing element 13, which is bridged or penetrated by the feedthrough stub 12. A receiving space 20 is formed in the gap 19, which serves to receive an optional damping element 21 (not visible here).
[0069] On the other side of the support component 4, the sealing component 13 forms a contact surface 22 for sealing against the partition wall 2. This contact surface 22 is located, in particular, on elastic sealing ribs 23, which are situated on the side of the sealing component 13 facing away from the support component 4 and extend towards the partition wall 2. In addition to the sealing ribs 23, a further sealing rib 24 is preferably provided, which also encompasses the extensions 7, and in particular runs on the outside of the mounting sleeves 8. This ensures a reliably tight seal between the sealing component 13 and the partition wall 2.
[0070] In the described embodiment, the gap 19 and the contact surface 22 are arranged on opposite sides of the support component 4, particularly with respect to the longitudinal center axis 11. For example, an imaginary plane is perpendicular to the longitudinal center axis 11. The plane lies within the support component 4, thus intersecting it, particularly in the direction of the longitudinal center axis 11. The gap 19 is located on a first side of the imaginary plane, and the contact surface 22 is located on a second side of the imaginary plane opposite the first side.
[0071] Figure 2 shows a schematic representation of the cable gland 1 during a first manufacturing step. In this step, the support component 4 with the stiffening component 5 embedded within it is present. The several extensions 7 radiating from the base body 9 of the support component 4 are visible. Optionally, in addition to the cable gland 12, a further cable gland (not shown here) is present, running parallel to the cable gland 12. The (optional) damping element 21 has an opening 26 in which the cable gland 12 is positioned. Optionally, a further opening for the additional cable gland is provided. For example, the damping element 21 is applied to the cable gland 12 in the direction of arrow 27 until it abuts the support component 4.
[0072] Figure 3 shows a schematic representation of the pipe penetration 1 during a second assembly step. In this step, the sealing component 13 is mounted on the support component 4 in the direction of arrow 28. The sealing component 13 has a recess 16 for the penetration fitting 12, which is penetrated by the penetration fitting 12.
[0073] Figure 4 shows a schematic representation of the cable gland 1 during a third assembly step. During this step, the fastening sleeves 8 are pressed into the support component 4, such that the sealing component 13 is positively locked between the support component 4 and the retaining collars 10 of the fastening sleeves 8.
[0074] Figure 5 shows a schematic representation of the fully assembled cable penetration 1. The described design of the cable penetration 1 enables particularly effective sound insulation between the rooms separated by the partition wall 2. This is achieved primarily by the additional arrangement of the stiffening component 5 within the support component 4. Furthermore, the material of the stiffening component 5 is selected to have a higher density than the material of the support component 4. This further increases the insulating effect of the cable penetration 1. REFERENCE SYMBOL LIST
[0075] 1 Cable entry 2 Partition wall
[0076] 3 Breakthrough
[0077] 4 Support component
[0078] 5 Stiffening component 6 Base body
[0079] 7 outriggers
[0080] 8 Mounting sleeve 9 Base body
[0081] 10 retaining collars
[0082] 11 Longitudinal center axis 12 Feedthrough stub 13 Sealing component 14 Connection
[0083] 15 connection
[0084] 16 Exclusion
[0085] 17 landing stage
[0086] 18 outer edge
[0087] 19 spaces
[0088] 20 Exceptional area
[0089] 21 Damping element 22 Contact surface
[0090] 23 Sealing bridge
[0091] 24 sealing strip
[0092] 26 Breakthrough
[0093] 27 Arrow
[0094] 28 Arrow
Claims
23 REQUIREMENTS 1. Pipe penetration (1) for arrangement on a partition wall (2) of a motor vehicle, comprising a support component (4) made of a support component material, on which at least one penetration nozzle (12) is formed, and a sealing component (13) made of a sealing component material, which overlaps the support component (4) and is penetrated by the at least one penetration nozzle (12), characterized in that, on the one hand, the sealing component (13) and the support component (4) are spaced apart from each other in certain areas to form a gap (19), and, on the other hand, the sealing component (13) of the support component (4) has a contact surface (22) for contact with the partition wall (2), wherein a stiffening component (5) made of a stiffening component material, which is different from the support component material and has a higher density than the latter, is arranged on the support component (4).
2. Conduit passage according to claim 1, characterized in that the stiffening component (5) is attached to the support component (4) and / or is at least partially incorporated into the support component (4).
3. Pipe penetration according to one of the preceding claims, characterized in that the stiffening component (5) has one or more recesses to adjust its stiffness.
4. Pipe penetration according to one of the preceding claims, characterized in that the sealing component surrounds an outer edge (18) of the support component (4) and the support component (4) is designed such that, when the pipe penetration (1) is arranged as intended on the partition wall (2), a further gap exists between the support component (4) and the partition wall (2).
5. Pipe penetration according to one of the preceding claims, characterized in that the contact surface (22) is located on elastic sealing webs (23, 24) which extend from the sealing component (13) in the direction away from the support component (4).
6. Cable penetration according to one of the preceding claims, characterized in that the support component material is a plastic or a composite material with a plastic matrix and / or the stiffening component material is a metal.
7. Cable penetration according to one of the preceding claims, characterized in that the sealing component (13) is penetrated by at least one fastening sleeve (8) which is provided and designed to receive a fastening means for attaching the cable penetration (1) to the partition (2).
8. Cable entry according to one of the preceding claims, characterized in that the at least one fastening sleeve (8) is attached to the support component (4) and / or the stiffening component (5) and / or is formed by the stiffening component (5).
9. Cable entry according to one of the preceding claims, characterized in that the fastening sleeve (8) is encompassed by an annular web of the support component (4) which projects in at least one direction beyond the base body (6) and / or the cantilever (7) of the support component (4).
10. Pipe penetration according to one of the preceding claims, characterized in that the sealing component (13) has a recess (16) bounded by a continuous recess edge, which is penetrated by the penetration nozzle (12), wherein the recess edge is continuously in contact with the penetration nozzle (12).
11. Pipe feedthrough according to one of the preceding claims, characterized in that the feedthrough nozzle (12) has a retaining web (17) against which the recess edge rests, and / or has several retaining webs (17) between which the recess edge is arranged.
12. Pipe penetration according to one of the preceding claims, characterized in that a damping element (21) made of a damping element material is arranged in the space (19) so that it rests against the sealing component (13) all around.
13. Pipe penetration according to one of the preceding claims, characterized in that the penetration nozzle (12) is a fluid penetration nozzle and has connections (14, 15) for fluid lines on opposite sides.
14. Method for manufacturing a pipe penetration (1), in particular a pipe penetration (1) according to one or more of the preceding claims, wherein the pipe penetration (1) has a support component (4) made of a support component material, on which at least one penetration nozzle (12) is formed, and a sealing component (13) made of a sealing component material that overlaps the support component (4) and is penetrated by the at least one penetration nozzle (12), characterized in thatthat, on the one hand, the sealing component (13) and the supporting component (4) are spaced apart from each other in certain areas to form a gap (19), and on the other hand, the sealing component (13) of the supporting component (4) has a contact surface (22) for contact with the partition wall (2), wherein a stiffening component (5) made of a stiffening component material that is different from the supporting component material and has a higher density than the latter is arranged on the supporting component (4).
15. Motor vehicle with a partition (2) and a cable gland (1) for arrangement on the partition (2), in particular a cable gland (1) according to one or more of the preceding claims, wherein a penetration (3) is provided in the partition (2) which is overlapped by the cable gland (1), wherein the cable gland (1) has a support component (4) made of a support component material on which at least one penetration nozzle (12) is formed, and a sealing component (13) made of a sealing component material which overlaps the support component (4) and is penetrated by the at least one penetration nozzle (12), characterized in thatthat, on the one hand, the sealing component (13) and the supporting component (4) are spaced apart from each other in certain areas to form a gap (19), and on the other hand, the sealing component (13) of the supporting component (4) has a contact surface (22) for contact with the partition wall (2), wherein a stiffening component (5) made of a stiffening component material that is different from the supporting component material and has a higher density than the latter is arranged on the supporting component (4).