Hubcap System and Vehicle

Description

[0001] The invention relates to a sealing ring, a hub cap system for attachment to a vehicle wheel hub, a wheel cap system comprising a wheel hub and a hub cap system, and a vehicle, in particular a commercial vehicle. Hub cap systems have, among other things, the function of protecting the inner area of ​​a wheel and / or wheel hub from the ingress of foreign bodies or particles and / or liquids, e.g., dirt or moisture. To achieve a better sealing effect, it is known from the prior art to provide sealing rings between the hub cap and the wheel hub to improve the seal against the ingress of foreign bodies. However, if the wheels are equipped with a tire pressure monitoring system, the resulting sealing effect can potentially be disadvantageous if, for example, due to leakage in the supply lines of the tire pressure monitoring system, compressed air enters the wheel hub.If the interior of the wheel hub is sealed to the outside, this can lead to a build-up of overpressure, which in turn can cause damage to the hub system or even result in the hub cap being lost or detached.

[0002] EP 1 489 320 A1 describes a bearing for supporting a wheel with a sealing ring having three sealing lips, according to the preamble of claim 1.

[0003] DE 10 2017 113 391 A1 describes a sealing arrangement for sealing a space between two machine elements with a running ring which has a sealing lip that is divided into a primary sealing lip and a force lip.

[0004] CN 201 795 048 U describes a sealing structure for a dust cover and a bearing. A sealing element has at least two sealing lips.

[0005] DE 27 31 886 A1 discloses a closure for a filler neck of a fuel tank. This closure includes a sealing ring made of an elastic material with lips.

[0006] CN 110 630 743 A discloses a sealing device for a wind turbine generator with a movable sealing ring.

[0007] It is therefore an object of the invention to provide a sealing ring and a corresponding hub cap system which, with sufficient sealing against the ingress of dirt or moisture, make it possible to equalize the internal pressure in the wheel hub in a simple way and which enable the simplest and most cost-effective assembly possible.

[0008] This problem is solved by a hubcap system according to claims 1-11, a wheel cover system according to claim 12, and a vehicle according to claim 13. Further advantages and features will become apparent from the respective dependent claims, as well as from the description and the figures.

[0009] According to the invention, a sealing ring comprises a retaining area, a primary sealing lip, and a secondary sealing lip, wherein the retaining area is formed circumferentially around an axial direction, and wherein a radial direction extends radially and perpendicularly away from the axial direction, and wherein the primary sealing lip and the secondary sealing lip have a radial extension, in particular a positive radial direction. The axial direction is specifically a direction perpendicular to the surface spanned by the sealing ring. The axial direction or the central axis preferably runs through the center of the sealing ring. The radial direction extends, in particular, radially outward from the center of the sealing ring and / or perpendicular to the axial direction. A positive radial direction can be defined as a direction extending from the center of the sealing ring.The radial direction of the sealing ring is understood to extend outwards from its central axis, while a negative radial direction can be understood as a direction that points radially from the outside towards the center or central axis of the sealing ring. The sealing ring can have a substantially constant cross-section and / or a predominantly or sectionally constant cross-section, particularly in a direction transverse to the axial direction and transverse to the radial direction. In this context, substantially constant means, in particular, that the sealing ring has a constant cross-section apart from design-related deviations. Predominantly or sectionally constant can mean that the sealing ring has a substantially constant cross-section but deviates from this constant cross-section in certain areas, e.g., by at least one opening. Advantageously, the sealing ring can be formed in one piece.A one-piece design can provide a particularly reliable seal and prevent assembly errors caused by incorrect fitting. For example, the sealing ring can be elastically fitted at its intended location. The sealing ring has a retaining area, which in particular comprises a contact area of ​​the sealing ring, e.g., against a hub cap and / or a wheel hub, and / or is designed to contact, e.g., a hub cap and / or a wheel hub. The sealing ring is particularly preferably designed to be used for a hub cap or a hub cap system. The retaining area can be a base body that constitutes the majority of the mass and / or volume of the sealing ring.The retaining area can have an approximately rectangular cross-section, and / or the corners of the retaining area can be rounded, and / or the retaining area can deviate from the rectangular cross-sectional shape on a side where the primary sealing lip and / or the secondary sealing lip is / are arranged or formed and / or adjoins the retaining area. The retaining area and / or the sealing ring can include recesses, indentations, and / or openings or perforations, which can serve, in particular, for the channeling and / or containment of air. The retaining area is arranged circumferentially around an axial direction and / or a central axis of the sealing ring. The primary sealing lip and / or the secondary sealing lip can adjoin the retaining area. Alternatively, the primary sealing lip and / or the secondary sealing lip can be spaced apart from the retaining area.For example, a transition area can be provided between the retaining area and the primary sealing lip and / or the secondary sealing lip. The primary sealing lip and / or the secondary sealing lip can preferably be elastic. Advantageously, the retaining area, the secondary sealing lip, and / or the primary sealing lip are made of the same material. The retaining area is advantageously bonded to the primary sealing lip and / or the secondary sealing lip, thereby achieving particularly high mechanical strength and sealing performance. A specified extent of the primary sealing lip and the secondary sealing lip can refer, in particular, to a relaxed state, i.e., a state in which the sealing lips are not elastically deformed. An extent of the primary sealing lip and / or the secondary sealing lip refers, in particular, to an extent along the main extent or the longest extent of the respective sealing lip.Preferably, the extent of the primary sealing lip and / or the secondary sealing lip is to be understood as referring to the orientation of the primary sealing lip and / or the secondary sealing lip. In particular, the extent can correspond to a longitudinal extent. The longitudinal extent is, in particular, the extent along which the sealing lip has its greatest extent or dimension. The primary sealing lip and / or the secondary sealing lip can also extend proportionally in another direction in addition to the radial direction, e.g., in the axial direction. The extent of the primary sealing lip and / or the secondary sealing lip therefore has at least one component in the radial direction. Optionally, the extent of the primary sealing lip and / or the secondary sealing lip can have a further component in another direction. For example, the primary sealing lip and / or the secondary sealing lip can extend obliquely to the radial direction.The direction of extension of the primary sealing lip and / or the secondary sealing lip is measured or defined, in particular, from its point of attachment to the other components of the sealing ring, especially the retaining area, to its distal end. An extension in a positive direction can mean that the primary sealing lip and / or the secondary sealing lip extends radially outward from its point of attachment to the sealing ring, away from the center of the sealing ring, its axial direction, or its central axis. In particular, a distal end of the primary sealing lip and / or the secondary sealing lip can be located further from the center of the sealing ring or its axial direction than the point of attachment of the primary sealing lip and / or the secondary sealing lip.The primary sealing lip can represent the distal end of the sealing ring in a first direction, particularly in the radial direction, and / or the secondary sealing lip can represent the end of the sealing ring in a second direction, particularly in a direction substantially perpendicular to the first direction, preferably parallel to the axial direction, and / or extend to the end of the sealing ring in the second direction. For example, the primary sealing lip can be configured to prevent the ingress of foreign matter, particularly dirt and / or water, into an interior space, e.g., a wheel hub and / or a wheel. The secondary sealing lip can be configured to prevent the ingress of foreign matter, particularly dirt and / or water, into the interior space, particularly when the pressure in the interior space is below a predetermined threshold pressure.Furthermore, the secondary sealing lip can be designed to allow pressure release by flexibly bending back when overpressure in the interior exceeds a predetermined threshold pressure. The bending back of the secondary sealing lip can be triggered, in particular, by the pressure in the interior. In other words, the secondary sealing lip can be designed to provide a seal at normal pressure and, when a pressure threshold is exceeded, to allow overpressure equalization by flexibly bending back. The sealing effect of the primary sealing lip and / or the secondary sealing lip can be achieved, in particular, by the primary sealing lip and / or the secondary sealing lip bearing against a surface, e.g., a hub cap and / or a wheel hub. Advantageously, the sealing ring according to the invention can, for example,It can be used, on the one hand, to prevent the ingress of dirt and / or water, in particular through the primary sealing lip, and on the other hand, if necessary, to allow the venting of excess pressure, e.g. leakage pressure, from an interior space, in particular through the secondary sealing lip.

[0010] Advantageously, the primary sealing lip and / or the secondary sealing lip can extend from the retaining area. In other words, the primary sealing lip and / or the secondary sealing lip can connect directly to the retaining area. This can result in a particularly simple and compact design of the sealing ring.

[0011] Advantageously, the primary sealing lip and / or the secondary sealing lip and / or the retaining area and / or the sealing ring can be made of rubber and / or a plastic, particularly predominantly. Advantageously, the sealing ring can be made entirely of rubber and / or a plastic. "Predominantly" here can mean that the sealing ring comprises, for example, a protective layer, particularly an outer one, and / or an inclusion and / or an outer additive made of another material. Alternatively or additionally, the sealing ring can include an admixture of another material. "Predominantly" can particularly mean that the sealing ring is made of rubber and / or a plastic to more than 50 percent, preferably more than 80 percent.By adding other materials so that the sealing ring consists of over 50 percent rubber and / or plastic, it can exhibit particularly good stability and / or protection against environmental influences. A composition of over 80 percent rubber and / or plastic can provide particularly good elasticity and / or sealing performance. Furthermore, a ring made entirely of rubber and / or plastic can be manufactured relatively inexpensively and / or easily.

[0012] Advantageously, a receiving space can be provided between the secondary sealing lip and the retaining area, wherein the receiving space is preferably rotationally symmetrical around the axial direction. The receiving space can preferably be a recess or a projection, particularly on one side of the sealing ring whose normal runs in the axial direction. The recess or projection can be configured, together with the secondary sealing lip and a surface against which the secondary sealing lip rests in the installed state or against which the secondary sealing lip rests at normal pressure, to form an externally sealed space, wherein the space can have a connection to an interior sealed by the sealing ring. The receiving space, recess, or projection can have a round, and in particular semicircular, cross-sectional profile in a direction transverse to the axial direction and transverse to the radial direction.The receiving space can, in particular, border at least partially, and preferably completely, on the extension of the secondary sealing lip. The volume of the receiving space can, in particular, ensure that the pressure acts as uniformly as possible on the secondary sealing lip, especially in the direction of rotation of the sealing ring. Additionally or alternatively, it can be made possible for the pressure to act on the entire extension of the secondary sealing lip or at least on a large part of its extension. Advantageously, the receiving space can, in particular, enable a particularly reliable pressure equalization function of the secondary sealing lip. Furthermore, a design, especially a rotationally symmetrical one, surrounding the sealing ring can result in particularly simple manufacturing.

[0013] Advantageously, the primary sealing lip can extend radially beyond the secondary sealing lip. This allows the secondary sealing lip to provide a seal radially outward or at a distal end in the positive radial direction. For example, the sealing ring can be used for a hub cap that has a mounting area and / or axially extending locking elements for engaging a wheel hub. The sealing ring can be positioned radially between an outer part of the wheel hub and the mounting area or locking elements. In this way, the primary sealing lip, due to its radial position, can seal the interior of the wheel hub or wheel. The secondary sealing lip, on the other hand, can function as a pressure relief valve by means of an elastic design.

[0014] Advantageously, the primary sealing lip and / or the secondary sealing lip can extend in both the axial and radial directions. In other words, the primary sealing lip and / or the secondary sealing lip can extend obliquely to both the axial and radial directions. This type of extension allows the primary sealing lip to create a particularly good seal against a surface, such as a wheel hub. The secondary sealing lip, due to this type of extension, can be used particularly effectively for releasing excess pressure, especially when it rests against a surface whose normal is parallel to the axial direction, allowing it to maintain a seal against the surface below a predetermined pressure value.Advantageously, the primary sealing lip and / or the secondary sealing lip can extend essentially equally in the axial and radial directions, whereby "essentially" can mean a deviation of a maximum of 10 percent from a uniform extension in these two directions. It has been found that such a uniform design can achieve a particularly good sealing effect and, furthermore, allows for the opening of a vent path by elastic bending of the secondary sealing lip with only minimal bending, especially less than with a non-angled orientation.

[0015] Advantageously, the primary sealing lip and the secondary sealing lip can be designed to extend in the same direction. In other words, the main directions of extension of the primary sealing lip and the secondary sealing lip can be aligned parallel to each other. This can represent a particularly simple and simultaneously effective embodiment for sealing.

[0016] Advantageously, the retaining area can have a base surface, the base surface preferably being coaxial with the axial direction and / or preferably facing the central axis of the sealing ring, and the base surface advantageously having a channel circumferential around the axial direction. The channel can preferably have a semicircular cross-section and / or a substantially constant cross-section along its length. The base surface can be formed or arranged opposite the side of the sealing ring or the retaining area to which the primary sealing lip abuts and / or to which the secondary sealing lip abuts. The channel can advantageously facilitate the installation of the sealing ring and / or increase the sealing effect of the sealing ring. In particular, the channel can be designed to be in fluid contact with an interior space to be sealed by the sealing ring.Advantageously, the air can be guided within the channel and, in particular, directed from the channel to the secondary sealing lip. The channel can thus enable particularly uniform and reliable venting.

[0017] Advantageously, the sealing ring can have a perforation. This perforation can be designed, in particular, to provide a vent or air passage from an interior sealed by the sealing ring to the secondary sealing lip. The perforation can be cylindrical. The sealing ring can preferably have several perforations, the perforations being, in particular, evenly distributed around the circumference of the sealing ring. Advantageously, the perforation can serve to connect a sealed interior to the secondary sealing lip and / or an area adjacent to the secondary sealing lip.

[0018] Advantageously, the opening can lead into the floor and / or the duct. In this way, the opening, particularly in conjunction with the duct, can serve to direct airflow, especially to provide a ventilation path in case of overpressure in the sealed interior space.

[0019] Advantageously, the opening can lead into the receiving chamber. This opening can facilitate a fluid connection between the interior and the receiving chamber. In this case, the receiving chamber can advantageously allow for a uniform distribution of any pressurized air. In the event of overpressure, the secondary sealing lip can be automatically and elastically bent back to create a venting path, with the release being reliably adjustable, particularly due to the uniform distribution via the receiving chamber. The opening designed in this way can thus provide a venting path through the sealing ring itself. Since it preferably involves only a single opening or only a few openings, the stability of the sealing ring is not significantly compromised.

[0020] Advantageously, the opening can extend in the axial and / or radial direction. An axial and radial extension can advantageously allow, for example, air from an area of ​​the sealed interior located further inward (in both axial and radial directions) to be directed to an area of ​​the sealing ring that is outer in both axial and radial directions. Furthermore, the transmission of pressure surges from the interior directly to the secondary sealing lip can be prevented, thus enabling more uniform pressure regulation of the interior.

[0021] Advantageously, the primary sealing lip and / or the secondary sealing lip can be designed to extend completely around the axial direction. In particular, a cross-section perpendicular to the axial and radial directions of the primary and / or secondary sealing lip can be constant. A design extending completely around the axial direction can simplify manufacturing. Furthermore, the sealing ring or the primary and / or secondary sealing lip can thus be particularly resistant to mechanical stress. Additionally, a completely circumferential design can ensure a uniform release of excess pressure.

[0022] According to a further aspect of the invention, a hub cap system for attachment to a wheel hub of a vehicle, in particular a commercial vehicle, is provided, comprising a hub cap and a sealing ring as described herein. A commercial vehicle within the meaning of the invention is, in particular, a vehicle having a permissible gross vehicle weight of more than 3.5 t, preferably more than 7.5 t, and most preferably more than 18 t. The commercial vehicle can, in particular, be a road-legal and / or road-bound vehicle. Preferably, such a commercial vehicle can be a trailer, in particular a semi-trailer. All advantages and features of the sealing ring can be transferred analogously to the hub cap system and vice versa. The sealing ring according to the invention can serve for the venting of an interior space of the wheel hub or a wheel in the event of overpressure, in particular by means of the secondary sealing lip, wherein the sealing ring simultaneously protects the interior space from dirt and / or water.other liquids, especially with the help of the primary sealing lip and / or the secondary sealing lip.

[0023] Advantageously, the hub cap can have a fastening area, in particular a groove, wherein the fastening area advantageously extends around the axial direction or central axis of the sealing ring, and / or wherein, optionally, the fastening area is advantageously designed to extend away from the axial direction or central axis of the sealing ring, and wherein the sealing ring, in particular the retaining area of ​​the sealing ring, is arranged on or in the fastening area. Extending away from the axial direction can, in particular, mean that the fastening area is arranged on a side of the hub cap facing in the positive radial direction. The fastening area, in particular the groove, can advantageously serve to stabilize the arrangement of the sealing ring or to ensure or facilitate the correct arrangement of the sealing ring during installation.

[0024] Advantageously, the hub cap can have or at least partially enclose an interior space, wherein the hub cap has at least one connecting opening, the connecting opening linking the opening, channel, or receiving chamber to the interior space. The connecting opening can, in particular, be designed as an air passage. Advantageously, the connecting opening can thus provide a venting path which is released into the interior space when the secondary lip elastically bends back under overpressure. Under overpressure, the air can flow specifically through this venting path, i.e., through the connecting opening and—if present—optionally through the opening, channel, and / or receiving chamber, thus ensuring venting under overpressure. If there is no overpressure or a pressure threshold is not exceeded, i.e.,Especially when ventilation is not necessary, the secondary protective lip ensures the protection of the interior.

[0025] Advantageously, the secondary sealing lip can rest against, or be capable of resting against, the hub cap. This provides a simple way for the secondary sealing lip to protect the interior when in contact with the hub cap. In particular, the secondary sealing lip can be designed to create a venting path for pressure relief when a predetermined pressure value in the interior is exceeded, by elastically bending away from the hub cap. Below the predetermined pressure value, the venting path can be blocked by resting against the hub cap. Preferably, the secondary sealing lip rests against a surface of the hub cap, the normal of which is oriented substantially parallel to the axial direction. A deviation from a parallel orientation, particularly of a maximum of 10°, preferably of a maximum of 5°, can be considered substantially parallel.This represents a particularly efficient way of regulating the internal pressure, specifically utilizing the geometric properties of the arrangement between the hub cap and the sealing ring. Advantageously, the secondary sealing lip can be oriented such that, when in contact, its point of contact with the hub cap is located further away from the center of the hub cap and / or further outwards (radially) than the secondary sealing lip's contact point with the sealing ring and / or the sealing ring's retaining area. This can, in particular, result in an inclined profile for the secondary sealing lip, which can be especially beneficial for sealing and / or allowing a venting path to be opened.

[0026] Advantageously, the sealing ring and / or the hub cap can be designed such that the pressure acting on one side, particularly the side facing the axial direction, of the secondary sealing lip essentially corresponds to the pressure inside the hub cap. In other words, fluid can flow from one side of the secondary sealing lip to the interior of the hub cap without the fluid having to leave the hub cap or the sealing ring. The pressure acting on the secondary sealing lip can thus correspond to the pressure inside, enabling a direct coupling of the behavior, especially opening and closing, of the secondary sealing lip to the pressure inside.

[0027] Advantageously, the hub cap can have fastening means, in particular fastening fingers, for securing the hub cap to a wheel hub. Preferably, the sealing ring and / or the fastening area can be arranged in the area where the fastening means connect to the hub cap. This allows for particularly easy clamping of the sealing ring and thus sealing by the sealing ring.

[0028] According to a further aspect of the invention, a wheel cover system comprising a wheel hub and a hub cap system as described herein is provided, wherein the primary sealing lip rests against or can be restrained against the wheel hub. All advantages and features of the sealing ring and the hub cap system can be transferred analogously to the wheel cover system and vice versa.

[0029] According to a further aspect of the invention, a vehicle, in particular a commercial vehicle, is provided comprising a sealing ring as described herein, a hub cap system as described herein, or a wheel cap system as described herein. All advantages and features of the sealing ring, the hub cap system, and the wheel cap system can be transferred analogously to the vehicle and vice versa.

[0030] Individual features and embodiments mentioned above can be combined with one another, and the advantages associated with each feature also apply to a combination of these features.

[0031] Further advantages and features of the invention will become apparent from the following description of preferred embodiments of the subject matter according to the invention with reference to the accompanying figures. The following description serves only to clarify the invention and should not be interpreted as limiting the accompanying claims to one of the embodiments. The figures show Fig. 1 a sectional view of a hub cap system according to an embodiment of the invention, Fig. 2 a sectional view of a sealing ring arranged on a hub cap, according to a first embodiment of the invention, Fig. 3 an enlarged sectional view of a sealing ring arranged on a hub cap, according to a first embodiment of the invention, Fig. 4 a sectional view of a sealing ring arranged on a hub cap, according to a second embodiment of the invention, Fig. 5an enlarged sectional view of a sealing ring arranged on a hub cap, according to a second embodiment of the invention and Fig. 6 a schematic side view of a vehicle according to one embodiment.

[0032] Figure 1 Figure 1 shows a sectional view of a hub cap system with a sealing ring 101 and a hub cap 2 according to an embodiment of the invention. The sealing ring 101 is arranged circumferentially around the hub cap 2 and is shown here, as well as in the following figures, in cross-section. The hub cap 2 comprises several fastening means 114 for clamping to a wheel hub. By placing the hub cap 2 onto the wheel hub, an interior space 110 can be formed, which can be sealed to the outside by means of the sealing ring 101.

[0033] The Figures 2 and 3Figure 1 shows a sectional view of a sealing ring 101 arranged on a hub cap 2, which is shown here in part, according to a first embodiment of the invention. The sealing ring 101 comprises a primary sealing lip 102 for bearing against a wheel hub and a secondary sealing lip 103, which bears against the hub cap 2. Both the primary sealing lip 102 and the secondary sealing lip 103 adjoin the retaining area 105 of the sealing ring 101 and extend from there in both the axial direction A and the radial direction R. In this embodiment, the retaining area 105 constitutes the main part of the sealing ring 101 and is arranged in a groove or on a mounting area of ​​the hub cap 2. A receiving space 116 is arranged below the primary sealing lip 103 and enclosed by the primary sealing lip 103, the retaining area 105, and a side wall of the wheel hub 2.The receiving chamber 116 is fluidically connected to the interior space 110 formed by the hub cap 2 and a wheel hub via a connecting opening 104 through the hub cap 2. An air channel is provided through the connecting opening 104 from the interior space 110 to the receiving chamber 116, ensuring that the pressure in the receiving chamber 116 essentially corresponds to the pressure in the interior space 110. If the pressure in the interior space 110 exceeds a predetermined maximum pressure, the secondary sealing lip 103 is elastically bent upwards, or essentially in the positive radial direction R, creating a venting path via the connecting opening 104, the receiving chamber 116, and past the secondary sealing lip 103. Air can escape from the interior space 110 to the outside via this venting path until the pressure in the interior space 110 no longer exceeds the predetermined maximum pressure.As soon as the pressure in the interior 110 no longer exceeds the maximum pressure, the secondary sealing lip 103 reconnects to the hub cap 2 and the vent path is closed again. In this state, no dirt or liquids can enter the interior 110, particularly due to the sealing ring 101 and the sealing lips 102 and 103.

[0034] The Figures 4 and 5Figure 1 shows a sectional view of a sealing ring 101 arranged on a hub cap 2, which is shown here in part. In this embodiment as well, the sealing ring 101 has a primary sealing lip 102 and a secondary sealing lip 103, as well as a retaining area 105. In this embodiment, the sealing lip 101 also has one or more openings 108 in the circumferential direction U, one of which is visible in this sectional view. The opening 108 extends both radially R and axially A. It thus connects a channel 106, which is arranged in a base surface 112 of the sealing ring 101, with the receiving space 116, which is configured here in the same way as in the first embodiment, which is shown in the Figures 2 and 3As shown, both the channel 106 and the receiving chamber 116 have a constant cross-section in the direction of rotation U. Both are therefore continuous and are connected at points by the openings 108. To connect the channel 106 to the interior 110, the hub cap 2 has at least one connecting opening 104. A vent can be opened via the connecting opening 104, the channel 106, the opening 108, and the receiving chamber 116 when the secondary sealing lip 103 is elastically bent back under overpressure in the interior 110 and thus also in the receiving chamber 116. Below a nominal pressure value, the secondary sealing lip closes by bearing against the hub cap 2, while the primary sealing lip 102 also seals the interior 110 by bearing against a connected wheel hub (not shown here).This means that the sealing ring 101, in an assembled system consisting of hub cap 2, wheel hub and sealing ring 101, can ensure that no foreign objects from the outside can enter the wheel hub or a wheel encompassing the wheel hub.

[0035] The Figure 6 Figure 40 shows a vehicle 40, which comprises several hubcap systems 1 on its wheels. The hubcap systems 1 can be provided, in particular, in an embodiment according to the invention. The hubcap systems 1 can be part of a wheel cover system according to the invention and / or comprise a sealing ring 101 according to the invention. In this case, the vehicle 40 is a trailer. A combination of different embodiments of hubcap systems on different wheels and / or axles of the vehicle 40 is also conceivable. Reference symbol:

[0036] 1 Hub cap system 2 Hub cap 40 Vehicle 101 Sealing ring 102 Primary sealing lip 103 Secondary sealing lip 104 Connecting opening 105 Retaining area 106 Channel 108 Opening 110 Interior 112 Floor surface 114 Fastening means 116 Receiving space A Axial direction R Radial direction U Circumference direction

Claims

1. Hub cap system for fastening to a wheel hub of a vehicle (40), in particular a commercial vehicle, comprising a hub cap (2) and a sealing ring (101) wherein the sealing ring (101) comprises a retaining region (105) for fastening to the wheel hub, a primary sealing lip (102) for bearing against the wheel hub and a secondary sealing lip (103) which bears against the hub cap, wherein the retaining region (105) is formed circumferentially around an axial direction (A), wherein the retaining region (105) has a bottom surface (112), wherein a radial direction (R) extends radially and perpendicularly away from the axial direction (A), wherein the primary sealing lip (102) and the secondary sealing lip (103) have an extension in the radial direction (R), in particular in the positive radial direction (R), characterized in that a channel (106) running around the axial direction (A) is formed in the bottom surface (112).

2. Hub cap system according to claim 1, wherein a direction of extension of the primary sealing lip (102) and the secondary sealing lip (103) is dimensioned from its shoulder to the retaining region (105) to its distal end.

3. Hub cap system according to any of the preceding claims, wherein a receiving space (116) is provided between the secondary sealing lip (103) and the retaining region (105), wherein the receiving space (116) is advantageously, in particular rotationally symmetrical, designed circumferential around the axial direction (A).

4. Hub cap system according to any of the preceding claims, wherein the primary sealing lip (102) and / or the secondary sealing lip (103) extend in the axial direction (A) and in the radial direction (R).

5. Hub cap system according to any of the preceding claims, wherein the primary sealing lip (102) and the secondary sealing lip (103) are designed to extend in the same direction.

6. Hub cap system according to any of the preceding claims, wherein the sealing ring (101) has an aperture (108).

7. Hub cap system according to claim 6, wherein the aperture (108) opens into the bottom surface (112) or the channel (106).

8. Hub cap system according to claim 6 or 7, wherein the aperture (108) opens into the receiving space (116).

9. Hub cap system according to any of the preceding claims, wherein the hub cap (2) has a fastening area, in particular a groove, wherein the fastening area is advantageously circumferential around the axial direction (A), and / or wherein the fastening area is advantageously formed pointing away from the axial direction (A), and wherein the sealing ring (101) is arranged on or in the fastening area.

10. Hub cap system according to any of the preceding claims, wherein the hub cap (2) has an interior space (110), wherein the hub cap (2) in particular has at least one connecting aperture (104), wherein the connecting aperture (104) can connect the aperture (104), the channel (106) or the receiving space (116) to the interior space (110).

11. Hub cap system according to any of the preceding claims, wherein the secondary sealing lip (103) bears against or is bearable against the hub cap (2).

12. Wheel cap system comprising a wheel hub and a hub cap system according to any of the preceding claims, wherein the primary sealing lip (102) bears against or is bearable against the wheel hub.

13. Vehicle (40), in particular commercial vehicle, comprising a hub cap system according to any of claims 1 to 11.