front air intake shutter device for motor vehicle
The motor vehicle air intake closure device with a synchronized flap opening system addresses the issue of non-parallel shutter arrangement by using a translation mechanism and actuator to ensure synchronized shutter operation, improving heat exchanger efficiency and aerodynamics.
Patent Information
- Application Number
- FR2021004227
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-04-22
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2041-04-22
AI Technical Summary
Existing shuttering devices for motor vehicle air intakes fail to ensure synchronized opening and closing of shutters when they are not arranged parallel to each other, which can occur due to aesthetic choices by manufacturers, leading to inefficiencies and aerodynamic issues.
A motor vehicle air intake closure device with a support frame and a synchronous flap opening system, featuring a suspended element connected to each shutter, guided by a translation mechanism and actuated by a linear actuator, ensures synchronized opening and closing of flaps regardless of their arrangement, using a system of interconnected shafts and levers to transmit rotation into translational motion.
The device achieves synchronized control of airflow through the shutters, optimizing heat exchanger efficiency and reducing drag coefficient by ensuring uniform shutter operation, enhancing both performance and aerodynamics.
Smart Images
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Abstract
Description
Title of the invention: Motor vehicle front air intake closure device
[0001] The present invention relates to a sealing device and more specifically to a sealing device for the front air intake of a motor vehicle.
[0002] The front ends of motor vehicles generally consist of two main air intakes, referred to as the high-flow and low-flow intakes, separated by a bumper beam. Behind this bumper beam are generally located the vehicle's heat exchangers, such as the one used for passenger compartment air conditioning and / or the one used for engine cooling.
[0003] It is also known to provide, in the air path passing through the main air inlets, more generally the lower section, a support frame comprising a multitude of flaps mounted to pivot about parallel axes and capable of assuming a multitude of different angular positions, between an open position and a closed position, under the action of appropriate control means. The various flaps generally include at one of their ends a lever arm connected to a common connecting rod. This common connecting rod is driven in translational motion by an actuator and thus controls the synchronous opening and closing of the flaps.
[0004] This results in a shuttering device similar to a louver, which allows adjustment of the airflow through the air inlets and into the heat exchangers. This makes it possible to optimize the efficiency of these heat exchangers according to requirements by varying the amount of air they receive. Furthermore, at high speeds, the shutters in the closed position reduce the vehicle's drag coefficient and thus improve its aerodynamics.
[0005] However, this type of shuttering device may not be suitable, particularly when the shutters are not arranged parallel to each other, for example, due to an aesthetic choice by the manufacturer. Indeed, in this case, it is important to have synchronized opening and closing of the shutters, which a common connecting rod cannot guarantee when the shutters do not open parallel to each other.
[0006] One of the aims of the present invention is therefore to remedy at least partially the disadvantages of the prior art by proposing an improved shuttering device allowing synchronous control of the opening and closing of the shutters regardless of their arrangement within the support frame.
[0007] The present invention therefore relates to a motor vehicle air intake closure device, said closure device comprising a support frame having a front face, intended to be exposed to an incoming airflow, and a rear face opposite the front face, said support frame having at least one through-hole, each through-hole having a closure assembly comprising at least two complementary flaps, each movable about a respective pivot axis between a closure position, in which the through-hole is closed by the complementarity of the at least two flaps, and an open position, in which the incoming airflow can pass through the through-hole, the flaps opening so as to protrude from the rear face of the support frame in the open position, the closure device further comprising a synchronous flap opening system, said opening system comprising: - a suspended element disposed on the rear face of the support frame and movable between a position close to the support frame and a position far from the support frame, said suspended element being connected to each of the shutters so that in the close position, the shutters are in the closed position and in the far position, the shutters are in the open position, - an actuation device configured to move the suspended element between the near position and the second distant position.
[0008] According to one aspect of the invention, the pivot axes of the flaps of a shutter assembly are arranged in the same plane.
[0009] According to another aspect of the invention, within the same shutter assembly at least two pivot axes of flaps are arranged on either side of the through orifice.
[0010] According to another aspect of the invention, within the same shutter assembly, the pivot axes of the flaps are arranged on the periphery of the through orifice.
[0011] According to another aspect of the invention, within the same obturation assembly, the free edge of each flap which is distal to the pivot axis covers a part of a central area of the through orifice in the obturation position.
[0012] According to another aspect of the invention, the shutter opening system includes at least one guide device to guide the suspended element in translation between its position close to and its position far from the support frame.
[0013] According to another aspect of the invention, the guiding device comprises: - a hollow component disposed on the support frame, the hollow of said component extending along an axis parallel to the movement of the suspended element, and - a guide rod inserted into the hollow organ so as to be able to slide in said hollow organ and one end of which is connected to the suspended element.
[0014] According to another aspect of the invention, the connection between the suspended element and a flap comprises a connecting rod fixed at one end to the flap by a pivot connection and fixed at one end to the suspended element by another pivot connection.
[0015] According to another aspect of the invention, the actuation device comprises at least one linear actuator.
[0016] According to another aspect of the invention, the actuation device comprises: - at least one first shaft disposed on the rear face of the support frame on a first side of at least one shutter assembly, said at least one first shaft being connected to an actuator so as to set it in rotation, - at least one second shaft disposed on the rear face of the support frame on a second side of at least one shutter assembly, opposite to the first side, - at least one means of transmitting the rotation of the first shaft to the second shaft, - at least one means of converting the rotation of the first and second shafts into translational movement of the suspended element.
[0017] According to another aspect of the invention, the means for transmitting the rotation from the first shaft to the second shaft comprises a first lever arm carried by the first shaft and a second lever arm carried by the second shaft, the ends of the first and second lever arms being connected to each other by a connecting rod.
[0018] According to another aspect of the invention, the means for transmitting the rotation from the first shaft to the second shaft comprises a toothed belt connecting the first and second shafts.
[0019] According to another aspect of the invention, the means for transmitting the rotation from the first shaft to the second shaft comprises a pinion carried by each of the first and second shafts, said pinions being connected by a transmission chain.
[0020] According to another aspect of the invention, the means for transmitting the rotation from the first shaft (9a) to the second shaft is arranged so as to be concealed behind a structural element of the support frame.
[0021] According to another aspect of the invention, the means for converting the rotation of the first and second shafts into translational motion of the suspended element comprises: - a crank carried by one of the first or second shafts, - a connecting element connected at one end to the suspended element and connected to the crank at its opposite end.
[0022] According to another aspect of the invention, the connecting member is a connecting rod comprising an articulated link with the crank and an articulated link with the structural element.
[0023] According to another aspect of the invention, the connecting member is a pivot-slide connection between the crank and the end of a rod of the suspended element, said end of the rod having a slide extending in a plane perpendicular to the axis of rotation of the shaft.
[0024] According to another aspect of the invention, the suspended element is perforated in line with the through openings so as to allow the circulation of an airflow.
[0025] According to another aspect of the invention, the support frame comprises a plurality of regular polygonal through holes, the shutter assemblies comprising a triangular flap on each side of said through holes.
[0026] According to another aspect of the invention, the support frame comprises, within at least one through orifice, a frame on which the edges of the flaps rest in the closing position.
[0027] Other features and advantages of the invention will become more apparent upon reading the following description, given by way of illustrative and non-limiting example, and the accompanying drawings, among which:
[0028] [Fig-1] [Fig.1] shows a schematic perspective representation of the face before a sealing device is in the closed position,
[0029] [Fig.2] [Fig.2] shows a schematic perspective representation of the face rear of a shutter device in the shutter position,
[0030] [Fig.3] [Fig.3] shows a schematic perspective representation of a assembly for sealing a through-hole in the support frame,
[0031] [Fig.4] [Fig.4] shows a schematic perspective representation of the rear face of a shutter device in the shuttered position with a synchronous shutter opening system,
[0032] [Fig. 5] [Fig. 5] shows a schematic cross-sectional and side view of the synchronous opening system for the shutters with the shutters in the closed position,
[0033] [Fig.6] [Fig.6] shows a schematic cross-sectional and side view of the synchronous opening system for the shutters with the shutters in the open position,
[0034] [Fig.7] [Fig.7] shows a schematic cross-sectional and side view of a means for transmitting the rotation from the first shaft to the second shaft according to a first position,
[0035] [Fig.8] [Fig.8] shows a schematic cross-sectional and side view of a means for transmitting the rotation from the first shaft to the second shaft in a second position,
[0036] [Fig.9] [Fig.9] shows a schematic perspective representation of a crank on a shaft,
[0037] [Fig. 10] [Fig. 10] shows a schematic cross-sectional and side-view representation of a conversion means in a first position according to a first embodiment,
[0038] [Fig. 11] [Fig. 11] shows a schematic cross-sectional and side-view representation of a conversion means in a second position according to the first embodiment,
[0039] [Fig. 12] [Fig. 12] shows a schematic cross-sectional and side-view representation of a conversion means in a first position according to a second embodiment,
[0040] [Fig. 13] [Fig. 13] shows a schematic cross-sectional and side view representation of a conversion means in a second position according to the second embodiment.
[0041] Identical elements in the different figures bear the same references.
[0042] The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features apply only to a single embodiment. Simple features from different embodiments can also be combined or interchanged to provide other embodiments.
[0043] In this description, certain elements or parameters can be indexed, such as first element or second element, first parameter and second parameter, first criterion and second criterion, etc. In this case, it is simply a matter of indexing to differentiate and name similar but not identical elements, parameters, or criteria. This indexing does not imply any priority of one element, parameter, or criterion over another, and such designations can easily be interchanged without departing from the scope of this description. Nor does this indexing imply any order in time, for example, for evaluating certain criteria.
[0044] Figures 1 and 2 show a motor vehicle air inlet shutter device 1. Such a shutter device 1 is generally located at the front of the motor vehicle and allows control of the incoming airflow, particularly for heat exchangers such as radiators and / or evaporative condensers. The shutter device 1 also allows the incoming airflow to be directed in a desired direction, for example, towards the heat exchangers. This shutter device 1 comprises a support frame 3 having a front face 3a (visible in [Fig. 1]), intended to be exposed to the airflow of incoming air, and a rear face 3b (visible in [Fig. 2]) opposite the front face 3a. The front face 3a is designed to face an incoming airflow, for example by being oriented towards the front of the motor vehicle in its assembled state. The rear face 3b, on the other hand, is designed to face the interior of the motor vehicle in its assembled state, for example by facing one or more heat exchangers.
[0045] The support frame 3 has at least one through-hole so that the incoming airflow passes through the sealing device. Each through-hole has a sealing assembly 5 comprising at least two complementary sealing flaps 50. The flaps 50 are movable about a respective pivot axis 51 (visible in [Fig. 3]) between a closed position, in which the through-hole is sealed by the complementarity of the at least two flaps 50, and an open position in which the incoming airflow can pass through the through-hole. More specifically, the flaps 50 open so as to protrude from the rear face 3b of the support frame 3 in the open position.
[0046] In the example illustrated in Figures 1 and 2, the support frame 3 has a plurality, here six, of through-holes, each having its own set of obturators 5. In Figures 1 and 2, the through-holes are arranged edge to edge. However, it is quite possible to imagine through-holes arranged at intervals on the support frame 3.
[0047] As shown in more detail in [Fig. 3], the pivot axes 51 of the flaps 50 of a filling assembly 5 can be arranged in the same plane. Within the same filling assembly 5, at least two pivot axes 51 of flaps 50 can be arranged on either side of the through-hole. Furthermore, the pivot axes 51 of the flaps 50 can be arranged around the periphery of the through-hole. The free edge of each flap 50, which is distal to the pivot axis 51, can cover part of a central area of the through-hole in the filling position. The support frame 3 can also include, within at least one through-hole, a frame 30 on which the edges of the flaps 50 rest in the filling position.
[0048] In the example illustrated in Figures 1 to 3, the through-hole has the shape of a regular polygon, more specifically a hexagon. The shutter assemblies 5 then comprise a triangular flap 50 on each side of said through-holes.
[0049] The shutter device 1 further comprises a synchronous opening system for the shutters 50 illustrated in [Fig. 4]. This opening system first comprises a suspended element 7 disposed on the rear face 3b of the support frame 3. By suspended, it is meant here that the element 7 is held at a distance from the rear face 3b of the support frame 3 and is movable relative to the support frame 3. The suspended element 7 is more particularly openwork directly above the through openings so as to allow the circulation of an airflow.
[0050] This suspended element 7 is notably mobile between a position close to the support frame 3 and a second position far from the support frame 3. The suspended element 7 is connected to each of the flaps 50 so that in the close position, the flaps 50 are in the closing position (see [Fig.5]) and in the far position, the flaps 50 are in the opening position (see [Fig.6]).
[0051] In order to move from one position to another, the suspended element 7 can, in particular, perform a rectilinear translation perpendicular to the plane defined by the support frame 3. To ensure a rectilinear translation, the shutter opening system 50 can, in particular, include at least one guide device 13 to guide the suspended element 7 in translation between its position close to and its position far from the support frame 3. The guide device 13 can, in particular, connect the suspended element 7 to the support frame 3 and be configured to give the suspended element 7 only one degree of freedom of movement between its position close to and its position far from the support frame 3. The shutter opening system can, in particular, include several guide devices 13 arranged regularly around the suspended element 7 in order to ensure uniform guidance of said suspended element 7.
[0052] This guidance device 13 may in particular include: - a hollow element 32 disposed on the support frame 3, the hollow of said element 32 extending along an axis parallel to the movement of the suspended element 7, and - a guide rod 70 inserted into the hollow member 32 so as to be able to slide within said hollow cylinder 32 and one end of which is connected to the suspended element 7. The guide rod 70 may, for example, be made of the same material as the suspended element 7. Another possibility is that the guide rod 70 is an added part fixed to the suspended element 7. The hollow of the hollow member 32 and the guide rod 70 may, in particular, have complementary shapes. For example, they may both be cylindrical or both have a complementary polygonal cross-section.
[0053] As illustrated in Figures 5 and 6, the connection between the suspended element 7 and a flap 50 may, in particular, include a connecting rod 130 fixed at one end to the flap 50 by a pivot joint 52 and fixed at the other end to the suspended element 7 by another pivot joint 72. These pivot joints 52, 72 pivot more specifically about axes parallel to the pivot axis 51 of the flap 50. The use of a rigid connecting rod 130 and pivot joints 52, 72 allows for a direct transmission of forces, and thus, when the suspended element 7 translates towards its distant position ([Fig. 6]), it pulls the flaps 50, bringing them to the open position and thus clearing the through-hole. When the suspended element 7 translates towards Its close position ([Fig. 5]) pushes the flaps 50, bringing them into the closed position of the through orifice. In the closed position of the flaps 50, the suspended element 7 and the connecting rod 130 hold the flaps 50 in the closed position and prevent them from opening under the force of wind or other force arriving at the front face 3a of the support frame 3.
[0054] The synchronous opening system for the shutters 50 also includes an actuation device configured to move the suspended element 7 from one position to another. According to a first variant not shown, the shuttering device 1 may include a linear actuator disposed on the support frame 3, and more particularly on its rear face 3b, and directly connected to the suspended element 7 in order to impart its translational movement.
[0055] According to a second variant illustrated in [Fig. 4], the actuation device may include at least one first shaft 9a disposed on the rear face 3b of the support frame 3. This first shaft 9a is disposed on one side of at least one sealing assembly 5. This first shaft 9a is connected to an actuator 10 so as to rotate it. This rotation may, for example, be on the order of 90°. In the example illustrated in [Fig. 4], the actuation device has two first shafts 9a disposed on either side of an actuator 10 in a central position on the support frame 3. It is nevertheless quite possible to imagine, for example, several actuators 10 disposed at the end of each first shaft 9a. Another possibility is to have only one first shaft 9a extending over the entire width of the support frame 3 and with a single actuator 10 connected to one of its ends.
[0056] The actuation device further comprises at least one second shaft 9b disposed on the rear face 3b of the support frame 3 on a second side of at least one shutter assembly 5, opposite the first side. The first shafts 9a are connected to the second shaft 9b by at least one transmission means 11 for transmitting the rotation from the first shaft 9a to the second shaft 9b. In the example illustrated in [Fig. 4], the actuation device comprises two second shafts 9b. Each second shaft 9b is connected to a first shaft 9a by a dedicated transmission means 11. It is also possible to imagine an embodiment in which several transmission means 11 connect a first 9a and a second 9b shaft. The multiplication of transmission means 11 allows, in particular, for efficient transmission of the rotation and also enables the distribution of forces in order to limit deformation stresses on the shafts 9a and 9b.The transmission means 11 can, in particular, transmit the rotation from the first shaft 9a to the second shaft 9b in both a clockwise and counterclockwise direction.
[0057] The means 11 for transmitting rotation from a first shaft 9a to a second shaft 9b is preferably arranged so as to be concealed behind an element of Structure of the support frame 3. In the example of [Fig. 4], the transmission means 11 are arranged at one end of the first 9a and second 9b shafts behind the support frame 3. However, it is entirely possible to imagine an embodiment in which the transmission means 11 pass between two through holes or above a armature 30 of a through hole. This ensures that the transmission means 11 is not visible from the front face 3a of the support frame 3.
[0058] According to a first variant not shown, the means 11 for transmitting rotation from the first shaft 9a to the second shaft 9b may comprise a toothed belt connecting the first 9a and second 9b shafts. According to a second variant, also not shown, the means 11 for transmitting rotation from the first shaft 9a to the second shaft 9b may comprise a sprocket carried by each of the first 9a and second 9b shafts, said sprockets being connected by a transmission chain.
[0059] According to a third embodiment illustrated in Figures 7 and 8, the means 11 for transmitting rotation from the first shaft 9a to the second shaft 9b comprises a first lever arm 91a carried by the first shaft 9a and a second lever arm 91b carried by the second shaft 9b. The ends of the first 91a and second 91b lever arms are connected to each other by a connecting rod 112. This connecting rod 112 includes, in particular, pivot joints 112 with the first 91a and second 91b lever arms. The lever arms 91a, 91b can, in particular, be made of the same material as their respective shafts 9a, 9b. The shaft 9a, 9b with its lever arms 91a, 91b can, for example, be produced by injection molding. According to an embodiment not shown, the lever arms 91a, 91b can be in the form of concentric discs with the shaft 9a, 9b and having an offset axis or orifice to ensure the pivot connection with the connecting rod 110.
[0060] With reference to [Fig. 4], the actuation device also includes at least one means 12 for converting the rotation of the first 9a and second 9b shafts into translational motion of the suspended element 7. In the example illustrated in [Fig. 4], the actuation device includes several conversion means 12 distributed evenly along the different shafts 9a, 9b. Having several conversion means 12 allows for uniform pushing and pulling of the suspended element 7 and limits torsional forces and the risk of jamming. The different conversion means 12 are also synchronous with each other so as to exert a uniform pushing or pulling force on the suspended element 7.
[0061] This conversion means 12 is described in more detail in Figures 9 to 13. The conversion means 12 for transferring the rotation of the first 9a and second 9b shafts into translational motion of the suspended element 7 comprises, firstly, a crank 120 carried by one of the first 9a or second 9b shafts. By crank 120, we mean here an axis 121 parallel to the axis of rotation of the first 9a or second 9b shaft and offset relative to it. The axis 121 and the first 9a or second 9b shaft are connected by at least one lever arm 122. In the example illustrated in [Fig. 9], the lever arm 122 is a disk concentric with the axis of rotation of the first 9a or second 9b shaft. Using a disk as the lever arm 122 allows for better mass distribution, particularly during rotation. According to the example illustrated in [Fig.9], the crank 120 has two lever arms 122. This allows the axis of rotation of the first 9a or second shaft 9b to be freed while ensuring continuity in the rotation between two portions of shaft 9a, 9b separated by the crank 120. It is nevertheless quite possible to imagine an embodiment in which a U-shaped crank 120 similar to that of a crankshaft is used or one having a lever arm in a different form than a disc.
[0062] In order to ensure synchronous conversion and transmission to the suspended element 7, the plane connecting the axis 121 to the axis of rotation of the first 9a or second 9b shaft is the same for all the cranks 120 of the same shaft 9a, 9b. The cranks 120 of the first shaft 9a are arranged in a plane parallel to those of the second shaft 9b again in order to ensure good synchronism.
[0063] The means for converting the rotation of the first 9a and second 9b shafts into translational motion of the suspended element 7 further comprises a connecting member connected at one end to the structural element 7 and connected to the crank 120 at its opposite end.
[0064] According to a first embodiment illustrated in Figures 10 and 11, the connecting member can be a connecting rod 125 having an articulated connection with the crank 120 and an articulated connection 123 with the suspended element 7. The articulated connection between the connecting rod 125 and the crank 120 is more particularly a pivot joint about the axis 121 of said crank 120. The articulated connection 123 between the connecting rod 125 and the suspended element 7 can also be a pivot joint pivoting about an axis parallel to the axis of rotation of the shaft 9a, 9b. In the example illustrated in figures 10 and 11 this articulated joint 123 is made at the end of the guide rod 70 of the suspended element 7. It is nevertheless quite possible to imagine an unillustrated variant in which the articulated joint 123 is made elsewhere on the suspended element 7.
[0065] According to a second embodiment illustrated in Figures 12 and 13, the connecting member is a pivot / slide joint between the crank 120 and the end of the rod 70 of the suspended element 7. The end of the rod 70 has a slide 124 extending in a plane perpendicular to the axis of rotation of the shaft 9a, 9b in which the shaft 121 of the crank 120 can slide and rotate. Preferably, the rod 70 can be the same rod 70 of the suspended element 7 used for the guide device 13.
[0066] Thus, it is clear that the shutter device 1 allows, by virtue of the presence of the suspended element 7, a synchronous opening and closing of all the shutters 50 regardless of their arrangement on the support frame 3.
Claims
1. Demands Motor vehicle air inlet closure device (1), said closure device (1) comprising a support frame (3) having a front face (3a), intended to be exposed to an incoming airflow, and a rear face (3b) opposite the front face (3a), said support frame (3) having at least one through-hole, each through-hole having a closure assembly (5) having at least two complementary flaps (50) each movable about a respective pivot axis (51) between a closed position, in which the through-hole is closed by the complementarity of the at least two flaps (50), and an open position, in which the incoming airflow can pass through the through-hole, the flaps (50) opening so as to protrude from the rear face (3b) of the support frame (3) in the open position, the closure device (1) further comprising an opening system synchronous shutters (50),said opening system comprising: - a suspended element (7) disposed on the rear face (3b) of the support frame (3) and movable between a position close to the support frame (3) and a position far from the support frame (3), said suspended element (7) being connected to each of the flaps (50) such that in the close position, the flaps (50) are in the closed position and in the far position, the flaps (50) are in the open position, - an actuating device configured to move the suspended element (7) between the close position and the second far position, characterized in that the actuating device comprises: - at least one first shaft (9a) disposed on the rear face (3b) of the support frame (3) on a first side of at least one sealing assembly (5), said at least one first shaft (9a) being connected to an actuator (10) so as to set it in rotation, - at least one second shaft (9b) disposed on the rear face (3b) of the support frame (3) on a second side of at least one shutter assembly (5), opposite the first side, - at least one means of transmitting (11) the rotation from the first shaft (9a) to the second shaft (9b), - at least one means of conversion (12) of the rotation of the first (9a) and second (9b) shafts into translational motion of the suspended element (7).
2. A shutter device (1) according to claim 1, characterized in that the shutter opening system (50) includes at least one guide device (13) to guide the suspended element (7) in translation between its position close to and far from the support frame (3).
3. A sealing device (1) according to the preceding claim, characterized in that the guiding device (13) comprises: - a hollow member (32) disposed on the support frame (3), the hollow of said member (32) extending along an axis parallel to the movement of the suspended element (7), and - a guide rod (70) inserted in the hollow member (32) so as to be able to slide in said hollow member (32) and one end of which is connected to the suspended element (7).
4. A shutter device (1) according to any one of the preceding claims, characterized in that the connection between the suspended element (7) and a flap (50) comprises a connecting rod (130) fixed at one end to the flap (50) by a pivot joint (52) and fixed at one end to the suspended element (7) by another pivot joint (72).
5. A sealing device (1) according to any one of the preceding claims, characterized in that the means for transmitting the rotation (11) from the first shaft (9a) to the second shaft (9b) comprises a first lever arm (91a) carried by the first shaft (9a) and a second lever arm (91b) carried by the second shaft (9b), the ends of the first (91a) and second (91b) lever arms being connected to each other by a connecting rod (110).
6. A sealing device (1) according to any one of the preceding claims, characterized in that the means for converting the rotation of the first (9a) and second (9b) shafts into translational movement of the suspended element (7) comprises: - a crank (120) carried by one of the first (9a) or second (9b) shafts, - a connecting member connected at one end to the suspended element (7) and connected to the crank (120) at its opposite end.
7. A sealing device (1) according to claim 6, characterized in that the connecting member is a connecting rod (125) comprising an articulated connection with the crank (120) and an articulated connection (123) with the structural element (7).
8. A sealing device (1) according to claim 6 in combination with claim 3, characterized in that the connecting member is a pivot-slide joint between the crank (120) and the end of a rod (70) of the suspended element (7), said end of the rod (70) having a slide (124) extending in a plane perpendicular to the axis of rotation of the shaft (9a, 9b).
9. A sealing device (1) according to any one of the preceding claims, characterized in that the support frame (3) comprises a plurality of regular polygonal through holes, the sealing assemblies (5) comprising a triangular flap (50) on each side of said through holes.