Cover and utility vehicle

Abstract

The invention relates to a cover (31) for a driver's cab ventilation system (30) of a utility vehicle (1), in particular a military utility vehicle, comprising an air-guiding housing (32) and a closure device (48, 49) for preventing the ingress of a liquid (83) into the air-guiding housing (32), wherein: the closure device (48, 49) has a float (78) which can float on the liquid (83); the closure device (48, 49) has at least one closure flap (61, 62) which can be brought from an open state (Z1), in which the at least one closure flap (61, 62) leaves an air inflow opening (43, 44) of the air-guiding housing (32) open, into a closed state (Z2), in which the at least one closure flap (61, 62) closes the air inflow opening (43, 44), and vice versa; and the float (78) is coupled to the at least one closure flap (61, 62) such that the float (78) moves the at least one closure flap (61, 62) from the open state (Z1) toward the closed state (Z2) when the float (78) floats on the liquid (83).

Description

[0001] RMM24003PWO DPT23004 WO

[0002] Rheinmetall MAN Military Vehicles Austria Ltd.

[0003] 1

[0004] COVER AND COMMERCIAL VEHICLE

[0005] The present invention relates to a cover for a cab ventilation system of a commercial vehicle, in particular a military commercial vehicle, and to a commercial vehicle, in particular a military commercial vehicle, with such a cover.

[0006] When driving off-road vehicles, water can enter the cab ventilation system when crossing bodies of water. This can cause filters, such as air filters, dust filters, pollen filters, sorption filters, or similar components, to become damp. As a result, the filters may no longer function properly or at all. Furthermore, the water can also enter the cab itself through the ventilation system.

[0007] To prevent such water ingress, ventilation flaps can be installed which the vehicle's crew can close from the outside before crossing bodies of water. This requires the crew to leave the cab. Alternatively, lever-operated systems can be used, allowing the ventilation flaps to be closed from inside the cab, as mentioned previously. In this case, leaving the cab to close the ventilation flaps is not necessary. However, water can still enter the cab through the lever mechanism itself if it is not properly sealed.

[0008] Against this background, one object of the present invention is to provide an improved cover for a driver's cab ventilation system. RMM24003PWO DPT23004 WO

[0009] Rheinmetall MAN Military Vehicles Austria Ltd.

[0010] 2 Accordingly, a cover for a cab ventilation system of a commercial vehicle, in particular a military commercial vehicle, is proposed.The cover comprises an air guide housing and a closure device for preventing the ingress of liquid into the air guide housing, wherein the closure device has a float capable of floating on the liquid, wherein the closure device has at least one closure flap that can be moved from an open state, in which the at least one closure flap releases an air inlet opening of the air guide housing, to a closed state, in which the at least one closure flap closes the air inlet opening, and vice versa, and wherein the float is coupled to the at least one closure flap in such a way that, when the float rises on the liquid, the float moves the at least one closure flap from the open state towards the closed state.

[0011] Because the float is integrated and coupled to at least one closure flap, the flap closes automatically simply by floating on the liquid. The closure device thus closes itself automatically. The vehicle's crew no longer needs to leave the vehicle to manually close the air intake openings. A complex lever mechanism is also unnecessary.

[0012] The cab ventilation system can be an air conditioning system or include an air conditioning unit that dehumidifies the interior of a commercial vehicle's cab and, for example, prevents icing or fogging of the cab's interior windows in winter. The cab ventilation system draws fresh air from the vehicle's surroundings and supplies it to the cab. The drawn-in fresh air RMM24003PWO DPT23004 WO

[0013] Rheinmetall MAN Military Vehicles Austria Ltd.

[0014] The air can be cooled, heated, and / or cleaned, and then supplied to the cab interior as clean air. The cab ventilation system can incorporate various filter elements for this purpose. The cover is typically box-shaped or housing-shaped and protects the cab ventilation system during operation. The cover is removable. This can be achieved, for example, by using screw connections, snap-fit ​​connections, and / or latch connections. This allows for both quick and easy installation and removal of the cover. The cover can also be referred to as the cab ventilation system cover.

[0015] The air duct housing is part of the cover. It guides fresh air drawn from the environment to the cab ventilation system. The air duct housing preferably comprises a box-shaped housing body and a removable housing cover. Accordingly, the air duct housing can be multi-part. In particular, the air duct housing can include the aforementioned housing body and the housing cover. The housing body and the housing cover can be made of plastic, especially injection-molded plastic. The housing cover and the housing body can be detachably connected by a screw connection, a snap-fit ​​connection, and / or a latching connection.

[0016] The cover can have any number of locking devices. Preferably, the cover has exactly two locking devices. However, the cover can also have exactly one locking device. The cover can also have more than two locking devices. Hereinafter, reference is made to only one locking device. The locking device, in particular, prevents a surge of liquid, for example water, from splashing into the air duct housing. The locking device is preferably not designed to RMM24003PWO DPT23004 WO

[0017] Rheinmetall MAN Military Vehicles Austria Ltd.

[0018] 4. Seal the air inlet opening gas-tight. Any liquid that nevertheless enters the air duct housing can be drained, for example, via a check valve provided at the lowest point of the air duct housing.

[0019] The float is preferably a hollow body. Alternatively, the float can also be made of a low-density material. For example, the float can be made of polystyrene or cork. The float can be essentially rotationally symmetrical about a central axis. Accordingly, the float can be cylindrical. "Cylindrical" in this context does not necessarily mean a circular cylinder. The float can have any number of bulges and protrusions on its cross-section.

[0020] The float is not, in particular, rigidly connected to the at least one closure flap. The at least one closure flap and the float are therefore two separate components. Accordingly, the fact that the float is "coupled" to the at least one closure flap does not necessarily mean that a rigid connection is provided between the float and the at least one closure flap. The "coupling" between the float and the at least one closure flap can consist of the float resting against or contacting the at least one closure flap. The "coupling" then occurs, for example, in such a way that the at least one closure flap follows a movement of the float. The float can also be described as a buoyancy aid.

[0021] Preferably, the float contactes the at least one closure flap in both its open and closed positions. Spring elements may be provided which... RMM24003PWO DPT23004 WO

[0022] Rheinmetall MAN Military Vehicles Austria Ltd.

[0023] 5. The locking flap is spring-loaded in the open position. This means that at least one locking flap is spring-loaded against the float. This prevents the float from rattling when subjected to vibrations or oscillations. Several spring elements may be provided. Alternatively, exactly one spring element may be provided. When moving the at least one locking flap from the open to the closed position, the float moves it against the spring force of the spring element(s).

[0024] As soon as the float rises to the surface of the liquid, it moves the at least one closure flap, switching it from the open to the closed position. A direct connection between the float and the at least one closure flap is preferably not provided. In other words, the float and the at least one closure flap are not rigidly connected. When disassembling the closure device, the float can be lifted off the at least one closure flap, or vice versa, without having to break any connection between the float and the at least one closure flap.

[0025] The locking device can have more than one locking flap. For example, the locking device can have two locking flaps, in particular a first locking flap and a second locking flap. However, the number of locking flaps is arbitrary. It is also possible to have exactly one locking flap. Hereinafter, at least one locking flap is assumed. "At least one locking flap" includes, for example, both exactly one locking flap and exactly two locking flaps. RMM24003PWO DPT23004 WO

[0026] Rheinmetall MAN Military Vehicles Austria Ltd.

[0027] 6

[0028] The at least one closing flap can be pivoted from the open to the closed position and vice versa. In the open position, the closing flap seals the air inlet opening. In the closed position, the at least one closing flap does not seal the air inlet opening. Multiple air inlets can be provided. For example, a first air inlet opening and a second air inlet opening are provided. Each air inlet opening can have its own closing device. The following refers to only one air inlet opening.

[0029] The air inlet opening is provided on the air duct housing. Specifically, the closing device is located upstream of the air inlet opening. Accordingly, the air inlet opening is positioned downstream of the closing device. "Upstream" and "downstream" refer here to the direction of flow of the fresh air drawn in from the environment. After passing through the closing device, the fresh air flows through the air inlet opening into the air duct housing. The air duct housing supplies the fresh air to the cab ventilation system.

[0030] The locking device moves itself automatically or independently, particularly with the aid of a buoyancy force generated by the float, from the open to the closed position. Manual operation of the locking device or an additional actuating element, for example in the form of an electric motor, a pneumatic cylinder, or a hydraulic cylinder, is therefore not required. This makes the locking device particularly easy to construct and also very reliable. RMM24003PWO DPT23004 WO

[0031] Rheinmetall MAN Military Vehicles Austria Ltd.

[0032] 7 According to one embodiment, the at least one closure flap performs a rotational movement when it is moved from the open state to the closed state and vice versa.

[0033] In particular, the at least one closure flap performs exclusively a rotary movement. A translational or linear movement of the at least one closure flap to move it from the open state to the closed state and vice versa is specifically not provided. The at least one closure flap can rotate about a pivot axis from the open state to the closed state and vice versa.

[0034] According to another embodiment, the locking device has a bearing frame on which at least one locking flap is rotatably mounted.

[0035] The bearing frame is preferably attached to the air guide housing. The bearing frame preferably comprises a rectangular frame section through which fresh air can flow into the air inlet opening. A first guide section and a second guide section preferably extend from the frame section. The at least one closing flap is rotatably mounted on the guide sections.

[0036] According to another embodiment, the bearing frame has a locking flap seat against which at least one locking flap rests in the closed state.

[0037] The locking flap seat is preferably a flat surface provided on the bearing frame, against which the at least one locking flap rests in the closed position. If a first locking flap and a second locking flap are provided, each of the locking flaps is RMM24003PWO DPT23004 WO

[0038] Rheinmetall MAN Military Vehicles Austria Ltd.

[0039] 8. Each closure flap is assigned its own seat. This means, in particular, that a first closure flap seat for the first closure flap and a second closure flap seat for the second closure flap can be provided on the bearing frame. Specifically, at least one closure flap does not form a fluid-tight seal against the closure flap seat when closed.

[0040] According to a further embodiment, the locking device has a first locking flap and a second locking flap, wherein the first locking flap and the second locking flap are rotatably mounted on the bearing frame about a common axis of rotation.

[0041] Preferably, each of the aforementioned guide sections of the bearing frame has an opening through which a bearing shaft passes. The first and second closure flaps are rotatably mounted on the bearing shaft about their common axis of rotation. As mentioned above, the term "at least one closure flap" includes both the first and second closure flaps. The first and second closure flaps are preferably designed and arranged in a mirror-symmetrical manner.

[0042] According to another embodiment, the first locking flap and the second locking flap each perform an opposing rotational movement when moved from the open state to the closed state and vice versa.

[0043] In other words, for example, the first locking flap can rotate clockwise when moving from the open to the closed position, whereas the second locking flap rotates counterclockwise when moving from the open to the closed position. RMM24003PWO DPT23004 WO

[0044] Rheinmetall MAN Military Vehicles Austria Ltd.

[0045] 9. Conversely, the first locking flap can rotate counterclockwise when moving from the closed to the open position, whereas the second locking flap rotates clockwise when moving from the closed to the open position. The first and second locking flaps thus move in opposite directions.

[0046] According to another embodiment, the float is mounted on the bearing frame in a linearly displaceable manner.

[0047] The float preferably has two block-shaped or cuboid-shaped guide ribs at its end face. These guide ribs are linearly mounted in guide grooves of the guide sections of the bearing frame. The float can thus move along the guide grooves towards or away from the frame section of the bearing frame. The at least one closure flap or flaps follow this linear movement of the float with their rotational movement. In other words, the linear movement of the float is converted into the rotational movement of the at least one closure flap or flaps.

[0048] According to another embodiment, at least one closure flap is spring-loaded in the direction of the open state by means of a spring element.

[0049] The spring element is preferably threaded onto the aforementioned bearing shaft. The spring element is, in particular, a torsion spring. Several spring elements may be provided. For example, two such spring elements are provided. If a first locking flap and a second locking flap are provided, these are connected using the spring element RMM24003PWO DPT23004 WO.

[0050] Rheinmetall MAN Military Vehicles Austria Ltd.

[0051] The 10 spring elements are jointly spring-loaded in the direction of the open state. When the float rises on the liquid, it pushes the at least one closure flap against a spring force of the spring element(s) from the open state to the closed state. A first spring element and a second spring element are particularly preferred.

[0052] According to another embodiment, the float has at least one contact rib which contacts the at least one closure flap in order to move the at least one closure flap from the open state towards the closed state.

[0053] The spring element pre-tensions the at least one closure flap against the contact rib. The contact rib preferably has a round or rounded cross-section so that it can roll on the at least one closure flap. The contact rib preferably extends outwards from the top of the float. "Top" in this context means facing the at least one closure flap. If a first closure flap and a second closure flap are provided, the float has, in particular, a first contact rib associated with the first closure flap and a second contact rib associated with the second closure flap. The at least one contact rib is always in contact with the at least one closure flap. The same applies if several closure flaps and several contact ribs are provided.In other words, the spring element or elements tension at least one or more closure flaps against the float. If the float floats on the liquid, it moves against the spring force of the spring element. RMM24003PWO DPT23004 WO.

[0054] Rheinmetall MAN Military Vehicles Austria Ltd.

[0055] 11

[0056] According to another embodiment, the float has a cylindrical cross-section from which a buoyancy-propelled section extends radially.

[0057] "Radial" means predominantly in a direction perpendicular to a central axis of the cylindrical cross-section. The buoyancy section increases the buoyancy area of ​​the float. This allows it to rise more quickly, for example, in the event of a surge of liquid. This results in faster closure of at least one valve. The buoyancy section can have a round or rounded cross-section, at least in part.

[0058] According to a further embodiment, the air guide housing has a housing body and a housing cover that can be removed from the housing body, wherein an extraction unit is attached to the housing cover, and wherein a first closing device and a second closing device are attached to the extraction unit.

[0059] In other words, the cover in this case has exactly two locking devices. However, the cover can also have exactly one locking device. The housing cover can, for example, be snapped, latched, and / or screwed to the housing body. The extraction unit can be attached to the housing cover. For example, the housing cover has a connection flange onto which the extraction unit can be attached. A screw connection, a snap connection, and / or a latch connection can be provided. This allows for easy and quick installation and removal of the extraction unit. Ribs can also be arranged on the inside of the housing cover to channel water away and thus reduce water contact with the cab ventilation system. This is advantageous because it extends the service life of the cab ventilation system. RMM24003PWO DPT23004 WO

[0060] Rheinmetall MAN Military Vehicles Austria Ltd.

[0061] 12

[0062] According to a further embodiment, the extraction unit has an extraction unit lower part attached to the housing cover and an extraction unit upper part removable from the extraction unit lower part, wherein the first closing device and the second closing device are attached to the extraction unit lower part, and wherein the extraction unit lower part has an air guide channel arranged between the first closing device and the second closing device.

[0063] In other words, the air duct runs between the first and second closure devices. The air duct can be attached to the aforementioned connection flange of the housing cover. The air duct supplies fresh air from the closure devices to the air duct housing, specifically the housing body.

[0064] According to another embodiment, the cover has a first fine filter located downstream of the first closure device and a second fine filter located downstream of the second closure device, wherein the first fine filter and the second fine filter are incorporated in the upper part of the extraction unit.

[0065] The upper part of the extraction unit is lid-shaped, allowing for easy replacement of the fine filters. The first fine filter is assigned to the first closure device, and the second fine filter to the second closure device. Incoming fresh air thus flows through the respective closure device and fine filter into the upper part of the extraction unit, and from there through the air duct into the housing of the air duct housing. The upper part of the extraction unit is connected to the lower part of the extraction unit, for example, by means of a snap-fit ​​or detent connection. (RMM24003PWO DPT23004 WO)

[0066] Rheinmetall MAN Military Vehicles Austria Ltd.

[0067] A screw connection can also be provided at point 13. This allows for very easy replacement of the fine filters.

[0068] Furthermore, a commercial vehicle, in particular a military commercial vehicle, is proposed with a cab ventilation system and such a cover, wherein the cover covers the cab ventilation system.

[0069] The commercial vehicle can be a truck. In particular, the commercial vehicle is an off-road truck. The commercial vehicle is a multi-axle vehicle. The commercial vehicle can be a two-axle, three-axle, four-axle, or five-axle vehicle. The commercial vehicle preferably includes all-wheel drive. The commercial vehicle can therefore also be referred to as an all-wheel-drive commercial vehicle. The commercial vehicle can be a protected commercial vehicle. In this context, "protected" means, in particular, that the commercial vehicle is protected against gunfire, booby traps, improvised explosive devices (IEDs), mines, or the like. The commercial vehicle includes the driver's cab, which is supported by a chassis. The driver's cab ventilation system is part of the driver's cab. Furthermore, the commercial vehicle can have an interchangeable body, which is also supported by the chassis.The commercial vehicle can be armed or unarmed.

[0070] According to one embodiment, the cab ventilation system, including the cover, is arranged below a windshield of the commercial vehicle and in front of a central seat of the commercial vehicle.

[0071] This arrangement of the cab ventilation system allows for a particularly ergonomic design of the center seat, as the cab ventilation system can be positioned in a space-saving manner. With the help of the cover, which is RMM24003PWO DPT23004 WO

[0072] Rheinmetall MAN Military Vehicles Austria Ltd.

[0073] The fact that it has a self-closing locking device (14) ensures that the required fording capability of the commercial vehicle is always guaranteed.

[0074] The embodiments and features described for the proposed cover apply accordingly to the proposed commercial vehicle and vice versa.

[0075] The term "one" here should not necessarily be understood as restricting the number to exactly one element. Rather, it can also refer to multiple elements, such as two, three, or more. Similarly, every other counter used here should not be interpreted as restricting the number to the exact number stated. Instead, numerical deviations, both higher and lower, are possible unless otherwise specified.

[0076] Other possible implementations of the cover and / or the commercial vehicle also include combinations of features or embodiments described previously or subsequently with regard to the exemplary embodiments, even if not explicitly mentioned. In such cases, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the cover and / or the commercial vehicle.

[0077] Further advantageous embodiments and aspects of the cover and / or the commercial vehicle are the subject of the dependent claims and the exemplary embodiments of the cover and / or the commercial vehicle described below. The cover and / or the commercial vehicle are further explained below with reference to preferred embodiments and the accompanying figures.

[0078] Fig. 1 shows a schematic side view of an embodiment of a commercial vehicle; RMM24003PWO DPT23004 WO

[0079] Rheinmetall MAN Military Vehicles Austria Ltd.

[0080] 15

[0081] Fig. 2 shows a schematic front view of an embodiment of a driver's cab for the commercial vehicle according to Fig. 1;

[0082] Fig. 3 shows a schematic perspective view of a cover for a cab ventilation system of the cab according to Fig. 2;

[0083] Fig. 4 shows a schematic perspective exploded view of the cover according to Fig. 3;

[0084] Fig. 5 shows a schematic perspective view of an embodiment of a locking device for the cover according to Fig. 3;

[0085] Fig. 6 shows a schematic perspective exploded view of the locking device according to Fig. 5; and

[0086] Fig. 7 shows a schematic side view of the locking device according to Fig. 5.

[0087] In the figures, identical or functionally equivalent elements have been given the same reference symbols, unless otherwise indicated.

[0088] Fig. 1 shows a schematic side view of an embodiment of a commercial vehicle 1.

[0089] Commercial vehicle 1 is a land vehicle. Commercial vehicle 1 is specifically a military commercial vehicle. Commercial vehicle 1 can therefore also be referred to as a military commercial vehicle. Commercial vehicle 1 can be a truck. Specifically, commercial vehicle 1 is an off-road vehicle (RMM24003PWO DPT23004 WO).

[0090] Rheinmetall MAN Military Vehicles Austria Ltd.

[0091] 16

[0092] Truck. The commercial vehicle 1 can be a protected vehicle. Therefore, the commercial vehicle 1 can also be referred to as a protected commercial vehicle.

[0093] The commercial vehicle 1 is assigned a coordinate system with a longitudinal direction (x-direction), a transverse direction (y-direction), and a vertical direction (z-direction). The x, y, and z directions are oriented perpendicular to each other. The z-direction is oriented parallel to a gravity direction (g). In the orientation shown in Fig. 1, the gravity direction (g) is oriented from top to bottom.

[0094] Commercial vehicle 1 is a wheeled vehicle. Commercial vehicle 1 comprises a chassis 2 with a plurality of axles 3, 4, 5, 6. Each of the axles 3, 4, 5, 6 is assigned at least one pair of wheels 7, 8, 9, 10. For example, four axles 3, 4, 5, 6 can be provided. This means that commercial vehicle 1 is a four-axle vehicle in this case. However, the number of axles 3, 4, 5, 6 is arbitrary. Commercial vehicle 1 can also be a two-axle, three-axle, or five-axle vehicle. Commercial vehicle 1 preferably includes all-wheel drive. This means that all axles 3, 4, 5, 6 can be driven. Commercial vehicle 1 can therefore also be referred to as an all-wheel-drive commercial vehicle. At least one of the axles 3, 4, 5, 6 is steerable. Preferably, two front axles or front axles 3 and 4 are steerable. Alternatively, all axles 3, 4, 5, and 6 can be steerable.

[0095] The chassis 2 carries a cab 11 of the commercial vehicle 1. The cab 11 can also be referred to as the driver's cab or driver's cabin. The cab 11 is preferably protected against gunfire, booby traps, improvised explosive devices (IEDs), mines, or the like. The cab 11 encloses an interior space 12 in which a crew of the commercial vehicle 1, for example, a driver and one or two passengers, can be located. The cab 11 encloses the interior space 12 and thus separates it from an environment 13 of the RMM24003PWO DPT23004 WO

[0096] Rheinmetall MAN Military Vehicles Austria Ltd.

[0097] 17

[0098] The driver's cab 11 is accessible. The interior 12 is accessible from the surroundings 13 by means of opening doors 14.

[0099] The chassis 2 is suitable for carrying an interchangeable body 15 of the commercial vehicle 1 in addition to the driver's cab 11. The body 15 can be, for example, a flatbed, a container, a box body, a tank, or the like. Figure 1 shows a body 15 in the form of a container.

[0100] The commercial vehicle 1 can move along a surface 17 in a direction of travel 16 using its wheels 7, 8, 9, 10. The direction of travel 16 is oriented opposite to the x-direction x. However, this does not preclude the commercial vehicle 1 from moving in the opposite direction of travel 16 on the surface 17 – for example, in reverse. The surface 17 can be a road or any type of terrain.

[0101] Fig. 2 shows a schematic front view of an embodiment of a driver's cab 11 as previously mentioned for the commercial vehicle 1.

[0102] The aforementioned coordinate system with directions x, y, z can also be assigned to the cab 11. The cab 11 comprises a mine-protected, in particular mine-protection-optimized, cab floor 18 and a cab shell 19, which is firmly connected to the cab floor 18. The cab floor 18 is, in particular, part of the cab shell 19. The cab shell 19 has a cab roof 20 arranged opposite the cab floor 18, two cab side walls 21, 22 arranged opposite each other, in particular a first cab side wall 21 and a second cab side wall 22, which may be provided with doors 14 as mentioned above, a cab front wall 23, and a cab rear wall (not shown) arranged opposite the cab front wall 23. The cab front wall 23 can accommodate a windshield 24 RMM24003PWO DPT23004 WO

[0103] Rheinmetall MAN Military Vehicles Austria Ltd.

[0104] 18. The windshield 24 can be divided into two windshield sections 25, 26. However, the windshield 24 can also be a single piece.

[0105] The cab floor 18 and the cab shell 19 enclose the interior 12. The interior 12 can be accessed from the surroundings 13 by means of the aforementioned doors 14 and / or hatches (not shown). A first seat 27, a second seat 28, and a third seat 29 are located within the cab 11 and thus within the interior 12. The first seat 27 can also be referred to as the driver's seat. The second seat 28 can also be referred to as the passenger seat. The third seat 29 can also be referred to as the middle seat, since, viewed along the y-direction y, it is positioned midway between seats 27 and 28.

[0106] Seats 27, 28, and 29 are positioned side-by-side and spaced apart along the y-direction y. The third seat, 29, is positioned above the first seat, 27, and the second seat, 28, along the z-direction z. The third seat, 29, can also be positioned centrally within the driver's cab 11 when viewed along the y-direction y. Seats 27, 28, and 29 are separate components and can be individually replaced. Therefore, seats 27, 28, and 29 do not form a continuous bench seat.

[0107] Viewed along the z-direction z, a cab ventilation system 30 is arranged below the windshield 24 and in front of the third seat 29, which is only very schematically indicated in Fig. 2. The cab ventilation system 30 can supply the interior 12 with fresh air from the environment 13. The cab ventilation system 30 can be an air conditioning system or include an air conditioning unit. This means that the interior 12 can be climate-controlled, in particular cooled and heated, by means of the cab ventilation system 30. Furthermore, the cab ventilation system 30 can be RMM24003PWO DPT23004 WO

[0108] Rheinmetall MAN Military Vehicles Österreich GesmbH 19 various filter elements are designed to filter, dehumidify, clean of particles and / or remove unwanted substances from the fresh air 13 drawn in from the environment and supply it to the interior 12 as clean air.

[0109] Fig. 3 shows a schematic perspective view of an embodiment of a cover 31 for the cab ventilation system 30. Fig. 4 shows a schematic perspective exploded view of the cover 31. Reference is made hereafter to Figs. 3 and 4 simultaneously.

[0110] The cover 31 is removable and mounted on the cab ventilation system 30 and / or on the cab 11, in particular on the cab front wall 23. This can be achieved, for example, by a snap-fit ​​connection, a latch connection, and / or a screw connection. This allows easy access to the cab ventilation system 30, for example, for maintenance work. The cover 31 can also be referred to as the cab ventilation system cover.

[0111] The cover 31 ensures a certain fording capability of the commercial vehicle 1 by preventing the ingress of liquid, especially water, into the cab ventilation system 30. "Fording capability" primarily refers to the suitability of the commercial vehicle 1 to cross a body of water up to a specified fording depth without any disruption, such as damage to the cab ventilation system 30. "Fording depth" refers to the maximum depth of water through which the commercial vehicle 1 can drive or wade.

[0112] The cover 31 includes an air guide housing 32, which allows fresh air from the environment 13 to be supplied to the cab ventilation system 30. The air guide housing 32 includes a box-shaped RMM24003PWO DPT23004 WO

[0113] Rheinmetall MAN Military Vehicles Austria Ltd.

[0114] 20

[0115] The housing body 33 and a housing cover 34 that is removable from the housing body 33. The housing body 33 and the housing cover 34 can be plastic components, in particular injection-molded plastic components. The housing cover 34 can be screwed to the housing body 33. However, a snap-fit ​​or latching connection between the housing cover 34 and the housing body 33 can also be provided. This allows the housing cover 34 to be removed from the housing body 33 without tools.

[0116] A check valve 35 can be provided at the lowest point of the housing body 33 for draining any liquid, in particular water, that has entered or condensed in the air duct housing 32. The air duct housing 32 can be mounted on the driver's cab 11, in particular on the front wall 23 of the driver's cab, using two mounting guides 36, 37.

[0117] The housing cover 34 has a connection flange 38 to which an extraction unit 39 is mounted. The extraction unit 39 has an extraction unit base 40 mounted on the housing cover 34, in particular on the connection flange 38. The extraction unit base 40 has an air guide channel 41 which is in fluid communication with the connection flange 38. For example, the air guide channel 41 is pushed onto the connection flange 38, so that the connection flange 38 is located inside the air guide channel 41. A snap-fit ​​connection, a snap connection, and / or a screw connection can be provided between the air guide channel 41 and the connection flange 38.

[0118] The air duct 41 extends from the underside of a plate-shaped base section 42 of the extraction unit lower part 40. The base section 42 includes a first air inlet opening 43 and a second air inlet opening 44. The air inlet openings 43 and 44 may be grille-shaped. Between RMM24003PWO DPT23004 WO

[0119] Rheinmetall MAN Military Vehicles Austria GesmbH 21 the air inlet openings 43, 44 the air guide duct 41 runs. The air guide duct is thus placed along the y-direction y viewed between the first air inlet opening 43 and the second air inlet opening 44.

[0120] In addition to the extraction unit base 40, the extraction unit 39 has an extraction unit top 45, which is removable from the extraction unit base 40 and is lid-shaped. The extraction unit top 45 is specifically box-shaped. The extraction unit top 45 can be connected to the extraction unit base 40. A snap-fit ​​connection, a snap-in connection, and / or a screw connection can be provided between the extraction unit top 45 and the extraction unit base 40.

[0121] The upper part 45 of the extraction unit contains a first fine filter 46 and a second fine filter 47. The fine filters 46 and 47 can be block-shaped or cuboid-shaped. The first fine filter 46 is assigned to the first air inlet opening 43, and the second fine filter 47 is assigned to the second air inlet opening 44. The fine filters 46 and 47 are arranged downstream of the air inlet openings 43 and 44.

[0122] A first closing device 48 and a second closing device 49 are mounted on the extraction unit 39, in particular on the lower part 40 of the extraction unit. The first closing device 48 is associated with the first air inlet opening 43, and the second closing device 49 is associated with the second air inlet opening 44. The closing devices 48 and 49 prevent a sudden surge of liquid, in particular water, into the air duct housing 32.

[0123] The locking devices 48, 49 can, for example, be screwed, latched, and / or snapped to the extraction unit base 40. The locking devices 48, 49 are arranged such that the air duct RMM24003PWO DPT23004 WO

[0124] Rheinmetall MAN Military Vehicles Austria Ltd.

[0125] 22

[0126] 41 of the lower part of the extraction unit 40 is arranged along the y-direction y, between the first closure device 48 and the second closure device 49. The closure devices 48 and 49 are preferably identical in construction. Therefore, only the first closure device 48 will be discussed below, which will be referred to simply as closure device 48.

[0127] Fig. 5 shows a schematic perspective view of an embodiment of a locking device 48 as previously mentioned. Fig. 6 shows a schematic perspective exploded view of the locking device 48. Fig. 7 shows a schematic side view of the locking device 48. Reference is made to Figs. 5 to 7 concurrently below.

[0128] The locking device 48 comprises a bearing frame 50, which enables the locking device 48 to be mounted on the extraction unit base 40. For example, the bearing frame 50 can be snapped or latched to the extraction unit base 40. A screw connection may also be provided. This allows for quick assembly and disassembly of the locking device 48. The bearing frame 50 can be a plastic component, in particular an injection-molded plastic component.

[0129] The bearing frame 50 comprises a rectangular frame section 51, which is penetrated centrally by an opening 52. Fresh air from the environment 13 can flow into the air guide housing 32 through the opening 52. In the orientation shown in Fig. 7, a first closing flap seat 53 and a second closing flap seat 54 are provided on the underside of the frame section 51. The closing flap seats 53, 54 are flat. For example, the closing flap seats 53, 54 are formed as surfaces provided on the frame section 51. RMM24003PWO DPT23004 WO

[0130] Rheinmetall MAN Military Vehicles Austria Ltd. 23

[0131] Two guide sections 55 and 56 extend from the underside of frame section 51. The guide sections 55 and 56 are oriented perpendicular to frame section 51. A first guide section 55 and a second guide section 56 are provided. The guide sections 55 and 56 and the frame section 51 form a single component, specifically a component made entirely of the same material. "Single component" or "one-piece" in this context means, in particular, that the guide sections 55 and 56 and the frame section 51 are not separate sub-components, but rather form a single component, namely the bearing frame 50. "Made entirely of the same material" in this context means that the bearing frame 50 is manufactured entirely from the same material.

[0132] The first guide section 55 has a first guide groove 57 extending along the z-direction. Accordingly, the second guide section 56 also has a second guide groove 58 extending along the z-direction. In the orientation shown in Fig. 6 above the guide grooves 57, 58, each guide section 55, 56 has a through-hole 59, 60 in the form of a bore. Thus, a first through-hole 59 and a second through-hole 60 are provided.

[0133] At least one locking flap 61, 62 is rotatably mounted on the bearing frame 50. However, it is particularly preferred that a first locking flap 61 and a second locking flap 62 are provided, which are rotatably mounted on the bearing frame 50. Viewed along the y-direction y, the two locking flaps 61, 62 are positioned between the two guide sections 55, 56. Alternatively, exactly one locking flap 61, 62 may be provided.

[0134] Each closure flap 61, 62 comprises a plate-shaped base section 63, 64 and a wall 65, 66 surrounding the respective base section 63, 64. The closure flaps 61, 62 can be closed at their ends by means of their walls 65, 66.

[0135] Rheinmetall MAN Military Vehicles Austria Ltd.

[0136] 24 are attached to the closing flap seats 53, 54 to close the air inlet openings 43, 44. The walls 65, 66 are U-shaped and extend at least partially around the respective base section 63, 64. The two walls 65, 66 of the closing flaps 61, 62 together form a frame-shaped geometry.

[0137] The closing flaps 61, 62 are mounted on the bearing frame 50 at their base sections 63, 64 by means of a common bearing axis 67. For this purpose, the bearing axis 67 is guided through tubular receiving sections 68, 69, 70, 71, 72, 73 provided on the closing flaps 61, 62, which extend from the base sections 63, 64, and through the openings 59, 60 of the guide sections 55, 56. To prevent the bearing axis 67 from slipping out of the openings 59, 60, end plugs 74, 75 are provided. The end plugs 74, 75 can be engaged or snapped into the openings 59, 60.

[0138] Spring elements 76, 77 are also associated with the locking flaps 61, 62. The spring elements 76, 77 can be threaded onto the bearing shaft 67. The spring elements 76, 77 are, in particular, torsion springs. The spring elements 76, 77 pre-tension the locking flaps 61, 62 in the direction of an open state ZI shown in FIGS. 5 and 7, in which the locking flaps 61, 62 do not bear against the locking flap seats 53, 54. A first spring element 76 and a second spring element 77 can be provided.

[0139] Furthermore, the closure device 48 comprises a float, buoyancy aid, or floating body 78. The floating body 78 is essentially cylindrical. The floating body 78 can be a hollow body. However, the floating body 78 can also be made as a solid body from a material with a low density, such as a plastic foam or cork. The floating body 78 is suitable for floating on a liquid, in particular on water, RMM24003PWO DPT23004 WO

[0140] Rheinmetall MAN Military Vehicles Austria GmbH 25 to float. The float 78 can actuate the locking flaps 61, 62.

[0141] The float 78 has two block-shaped or cuboid-shaped guide webs 79, of which only one is shown in Figures 5 to 7. The two guide webs 79 are arranged on both sides of the float 78 when viewed along the y-direction y. The guide webs 79 are received in the guide grooves 57, 58 of the bearing frame 50 such that the float 78 can move upwards and downwards along the z-direction z.

[0142] In the orientation shown in Figures 6 and 7, a first contact rib 80 and a second contact rib 81 extend from the upper surface of the float 78. The first contact rib 80 is designed to contact the first closure flap 61. Similarly, the second contact rib 81 is designed to contact the second closure flap 62. Furthermore, a buoyancy section 82 extends radially from the float 78. The spring elements 76, 77 pre-tension the closure flaps 61, 62 against the contact ribs 80, 81, so that the closure flaps 61, 62 are always in contact with the float 78. This prevents rattling of the float 78, for example, due to vibrations.

[0143] The functionality of the closure device 48 is explained below. The closure flaps 61, 62 are initially in the open state ZI shown in Figures 5 and 7. In the open state ZI, the closure flaps 61, 62 do not rest against the closure flap seats 53, 54 of the bearing frame 50. This means that fresh air from the environment 13 can flow through the frame section 51 and through the air inlet openings 43, 44 into the air guide housing 32. RMM24003PWO DPT23004 WO

[0144] Rheinmetall MAN Military Vehicles Austria Ltd.

[0145] 26

[0146] The spring elements 76, 77 bias the locking flaps 61, 62 in the direction of the open state ZI. This means, in particular, that the locking flaps 61, 62 can be moved against a spring force of the spring elements 76, 77 from the open state ZI to a closed state Z2, shown with dashed lines in Fig. 7. In doing so, the locking flaps 61, 62 perform a rotational movement.

[0147] As shown in Fig. 7, the float 78 is initially in state Z10, in which it is not yet floating on a liquid 83, for example, water. If the commercial vehicle 1 now travels, for example, through a body of water, the liquid 83 flows towards the float 78 in a surge, causing it to float on the liquid 83. The buoyancy section 82 facilitates this floating of the float 78 on the liquid 83. The float 78 is then moved from state Z10 to state Z20, in which it floats on the liquid 83.

[0148] As the float 78 rises on the liquid 83, it moves from state Z10 upwards along the guide grooves 57, 58 towards state Z20, so that the contact ribs 80, 81 push the closing flaps 61, 62 upwards against the spring force of the spring elements 76, 77. The float 78 then moves the closing flaps 61, 62 against the spring force of the spring elements 76, 77 from the open state ZI to the closed state Z2.

[0149] In the closed state Z2, the sealing flaps 61, 62 rest against the sealing flap seats 53, 54, preventing the liquid 83 from entering the air guide housing 32. As they move from the open state ZI to the closed state Z2, the sealing flaps 61, 62 rotate about a common axis of rotation 84. RMM24003PWO DPT23004 WO

[0150] Rheinmetall MAN Military Vehicles Austria Ltd.

[0151] 27

[0152] The axis of rotation 84 can coincide with the bearing axis 67. The sealing flaps 61, 62 do not form a fluid-tight seal against the sealing flap seats 53, 54, but are only intended to prevent a surge of liquid 83 from entering the air guide housing 32. This means that a certain amount of liquid 83 can still enter the air guide housing 32. This amount of liquid 83 can be drained via the check valve 35.

[0153] The locking flaps 61 and 62 undergo opposing rotational movements when moved from the open state ZI to the closed state Z2. In other words, the first locking flap 61 rotates clockwise when moved from the open state ZI to the closed state Z2, whereas the second locking flap 62 rotates counterclockwise when moved from the open state ZI to the closed state Z2. Conversely, the first locking flap 61 rotates counterclockwise when moved from the closed state Z2 to the open state ZI, whereas the second locking flap 62 rotates clockwise when moved from the closed state Z2 to the open state Z1.

[0154] Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

[0155] RMM24003PWO DPT23004 WO

[0156] Rheinmetall MAN Military Vehicles Austria Ltd.

[0157] 28

[0158] REFERENCE MARK LIST

[0159] 1 commercial vehicle

[0160] 2 chassis

[0161] 3-axis

[0162] 4-axis

[0163] 5-axis

[0164] 6-axis

[0165] 7 wheel

[0166] 8 wheel

[0167] 9 wheel

[0168] 10 wheels

[0169] 11 Driver's cab

[0170] 12 Interior

[0171] 13 Environment

[0172] 14 Door

[0173] 15 Structure

[0174] 16 Direction of travel

[0175] 17 Underground

[0176] 18 Cab floor

[0177] 19 Cab shell

[0178] 20 Cab roof

[0179] 21 Cab side wall

[0180] 22 Cab side wall

[0181] 23 Cab front wall

[0182] 24 Windscreen

[0183] 25 Windscreen section

[0184] 26 Windscreen section

[0185] 27 Seat / Driver's seat

[0186] 28 Seat / Passenger seat RMM24003PWO DPT23004 WO

[0187] Rheinmetall MAN Military Vehicles Austria Ltd.

[0188] 29

[0189] 29 Seat / Middle Seat

[0190] 30 Cab ventilation system

[0191] 31 Cover

[0192] 32 air duct housings

[0193] 33 Housing body

[0194] 34 Housing covers

[0195] 35 Check valve

[0196] 36 Assembly instructions

[0197] 37 Assembly instructions

[0198] 38 Connection flange

[0199] 39 Extraction unit

[0200] 40 Extraction unit base

[0201] 41 Air duct

[0202] 42 base cut

[0203] 43 Air intake opening

[0204] 44 Air intake opening

[0205] 45 Extraction unit upper part

[0206] 46 fine filters

[0207] 47 fine filters

[0208] 48 Locking device

[0209] 49 Locking device

[0210] 50 storage frames

[0211] 51 Frame section

[0212] 52 Breakthrough

[0213] 53 Locking flap seat

[0214] 54 Locking flap seat

[0215] 55 Leadership section

[0216] 56 Leadership section

[0217] 57 Guide groove

[0218] 58 Guide groove RMM24003PWO DPT23004 WO

[0219] Rheinmetall MAN Military Vehicles Austria Ltd.

[0220] 30

[0221] 59 Breakthrough

[0222] 60 Breakthrough

[0223] 61 Locking flap

[0224] 62 locking flaps

[0225] 63 base cut

[0226] 64 base cut

[0227] 65 wall

[0228] 66 wall

[0229] 67 bearing axle

[0230] 68 Recording section

[0231] 69 Recording from cut

[0232] 70 recording e off section

[0233] 71 Recording e section

[0234] 72 Recording from cut

[0235] 73 Recording from cut

[0236] 74 end plugs

[0237] 75 end plugs

[0238] 76 Spring element

[0239] 77 Spring element

[0240] 78 floats

[0241] 79 Leading platform

[0242] 80 contact rib

[0243] 81 Contact rib

[0244] 82 lift saw cut

[0245] 83 Liquid

[0246] 84 Axis of rotation g Gravity direction x x-direction / Longitudinal direction y y-direction / Transverse direction RMM24003PWO DPT23004 WO

[0247] Rheinmetall MAN Military Vehicles Austria Ltd.

[0248] 31 z z-direction / vertical direction

[0249] ZI condition

[0250] Z2 condition

[0251] Z10 condition Z20 condition

Claims

1. RMM24003PWO DPT23004 WO Rheinmetall MAN Military Vehicles Austria Ltd. 32 patent claims 1. Cover (31) for a cab ventilation system (30) of a commercial vehicle (1), in particular a military commercial vehicle, comprising an air guide housing (32) and a closure device (48, 49) for preventing the ingress of a liquid (83) into the air guide housing (32), wherein the closure device (48, 49) has a float (78) that floats on the liquid (83), wherein the closure device (48, 49) has at least one closure flap (61, 62) that can be moved from an open state (Z1), in which the at least one closure flap (61, 62) exposes an air inlet opening (43, 44) of the air guide housing (32), to a closed state (Z2), in which the at least one closure flap (61, 62) closes the air inlet opening (43, 44), and vice versa, and wherein the float (78) is coupled to at least one locking flap (61, 62) in this way,that the float (78) moves the at least one closure flap (61, 62) from the open state (Z1) towards the closed state (Z2) when the float (78) rises on the liquid (83).

2. Cover according to claim 1, characterized in that the at least one closure flap (61, 62) performs a rotational movement when moving from the open state (Z1) to the closed state (Z2) and vice versa.

3. Cover according to claim 2, characterized in that, RMM24003PWO DPT23004 WO Rheinmetall MAN Military Vehicles Austria Ltd. 33 that the locking device (48, 49) has a bearing frame (50) on which at least one locking flap (61, 62) is rotatably mounted.

4. Cover according to claim 3, characterized in that the bearing frame (50) has a locking flap seat (53, 54) against which the at least one locking flap (61, 62) rests in the closed state (Z2).

5. Cover according to claim 3 or 4, characterized in that the closure device (48, 49) has a first closure flap (61) and a second closure flap (62), wherein the first closure flap (61) and the second closure flap (62) are rotatably mounted on the bearing frame (50) about a common axis of rotation (84).

6. Cover according to claim 5, characterized in that the first closure flap (61) and the second closure flap (62) each perform an opposite rotational movement when moving from the open state (Z1) to the closed state (Z2) and vice versa.

7. Cover according to one of claims 3 - 6, characterized in that the float (78) is mounted linearly displaceable on the bearing frame (50).

8. Cover according to one of claims 1-7, characterized in that, RMM24003PWO DPT23004 WO Rheinmetall MAN Military Vehicles Österreich GesmbH 34 that at least one closure flap (61, 62) is spring-loaded in the direction of the open state (Zl) by means of a spring element (76, 77).

9. Cover according to one of claims 1 - 8, characterized in that the float (78) has at least one contact rib (80, 81) which contacts the at least one closure flap (61, 62) in order to move the at least one closure flap (61, 62) from the open state (Z1) towards the closed state (Z2).

10. Cover according to one of claims 1 - 9, characterized in that the float (78) has a cylindrical cross-section from which a buoyancy section (82) extends radially.

11. Cover according to one of claims 1 - 10, characterized in that the air guide housing (32) has a housing body (33) and a housing cover (34) removable from the housing body (33), wherein an extraction unit (39) is attached to the housing cover (34), and wherein a first closing device (48) and a second closing device (49) are attached to the extraction unit (39).

12. Cover according to claim 11, characterized in that the extraction unit (39) has an extraction unit lower part (40) attached to the housing cover (34) and an extraction unit upper part (45) removable from the extraction unit lower part (40), wherein the first locking device (48) and the second locking device (49) are attached to the extraction unit lower part (40), and wherein the extraction unit lower part (40) has a RMM24003PWO DPT23004 WO Rheinmetall MAN Military Vehicles Austria Ltd. 35 air duct (41) which is arranged between the first closure device (48) and the second closure device (49).

13. Cover according to claim 12, characterized by a first fine filter (46) located downstream of the first closure device (48) and a second fine filter (47) located downstream of the second closure device (49), wherein the first fine filter (46) and the second fine filter (47) are accommodated in the upper part (45) of the extraction unit.

14. Commercial vehicle (1), in particular military commercial vehicle, with a cab ventilation system (30) and a cover (31) according to one of claims 1 - 13, wherein the cover (31) covers the cab ventilation system (30) and is removable from it.

15. Commercial vehicle according to claim 14, characterized in that the cab ventilation system (30) together with the cover (31) is arranged below a windshield (24) of the commercial vehicle (1) and in front of a central seat (29) of the commercial vehicle (1).

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