Ventilation device comprising retention means

Abstract

The invention relates to a ventilation device (100) comprising: • a bladed member (1), • an electric motor (2) and • a torque transmission part (3) designed to transmit a torque developed by the electric motor (2) to the bladed member (1), the torque transmission part (3) comprising: o a first section (4) intended to transmit the torque developed by the electric motor (2) from the torque transmission part (3) to the bladed member (1), and o a second section (5) intended to fasten the torque transmission part (3) to the electric motor (2), the arrangement of the bladed member (1) with the torque transmission part (3) forming a coupling (6), and the device being characterized in that it comprises retention means (7) configured to retain, within the coupling (6), elements produced during the interaction of the bladed member (1) with the torque transmission part (3).

Description

[0001] VENTILATION DEVICE COMPRISING RETENTION MEANS

[0002] Technical field

[0003] The invention relates to a ventilation device, in particular for a cooling module, for example for a motor vehicle, in particular an electric vehicle.

[0004] Prior art

[0005] It has previously been proposed by the state of the art, in particular by the publication FR3115503, a ventilation device equipped with a torque transmission part between on the one hand a tangential blade member and on the other hand an electric motor. This torque transmission part from the motor to the blade member made it possible in particular to mount the ventilation device within a cooling module in two main stages. The first stage consisting of screw mounting of the torque transmission part with the electric motor and this prior to installation in the cooling module. Then followed by a second stage consisting of mechanically fitting the torque transmission part, within the cooling module with the blade member. This last stage having the advantage of being able to be carried out without screws and blindly due to the configuration of the torque transmission part.In order to ensure the proper functioning of the ventilation device according to such a design, it is customary to lubricate the mechanical connection between the bladed member and the torque transmission part. However, when the ventilation device is in operation, the lubrication of even a very viscous lubricating solution such as grease, is centrifuged and causes pollution of the electric motor. Similarly, it has been found that in the absence of lubrication of the torque transmission part, pollution can also result from the friction created during operation of the device. Indeed, wear of the parts causes detachment of material in the form of dust or chips of varying sizes, these debris under centrifugal force being caused to end up in the electric motor, which would degrade its operation.

[0006] Statement of the invention

[0007] In order to correct the drawbacks of the prior art, the present invention relates to a ventilation device comprising:

[0008] • a bladed organ,

[0009] • an electric motor and

[0010] • a torque transmission part arranged to transmit a torque developed by the electric motor to the bladed member, the torque transmission part comprising: o a first section intended to transmit the torque developed by the electric motor from the torque transmission part to the bladed member and o a second section intended to fix the torque transmission part to the electric motor, the arrangement of the bladed member with the torque transmission part forming a coupling and the device being characterized in that it comprises retention means configured to retain within the coupling elements produced during the interaction of the bladed member with the torque transmission part.

[0011] Advantageously, the present invention thus makes it possible to prevent any pollution of the electric motor due to the operation of the ventilation device and this by projection of elements produced by the operation of the bladed member arranged with the torque transmission part.

[0012] The coupling of the blade member with the torque transmission part defines a volume formed by the contact zones and the mechanical clearances between the first section and the blade member. It is also understood that the volume of the coupling corresponds to the interstitial space between the first section and the blade member.

[0013] The coupling of the bladed member with the torque transmission part can be direct or indirect by one or more intermediate parts.

[0014] The elements produced are, for example, dust, wear chips or lubricant leakage. The retention means of the device aim to retain these produced elements within the volume defined by the coupling of the bladed member with the torque transmission part.

[0015] According to one aspect of the invention, the blade member and / or the torque transmission part comprise the retention means.

[0016] According to one aspect of the invention, the bladed member and the torque transmission part in operation rotate around an axis of rotation, the retention means are arranged all around the axis of rotation. It is thus understood that the retention means extend circularly around the axis of rotation.

[0017] According to one aspect of the invention, the torque transmission part comprises a peripheral wall arranged to cooperate with the retention means.

[0018] According to one aspect of the invention, the torque transmission part comprises a first face oriented towards the blade member and a second face oriented towards the electric motor, the peripheral wall extending from the first face outwards. According to one aspect of the invention, the peripheral wall extends perpendicular to the first face of the torque transmission part.

[0019] According to one aspect of the invention, the first section comprises a footprint arranged to transmit the torque to a counter-footprint of the blade member.

[0020] According to one aspect of the invention, the peripheral wall extends circularly relative to the axis of rotation so as to surround the footprint of the first section.

[0021] According to one aspect of the invention, the retention means are smaller than the blade member and the torque transmission part. This makes it possible to maintain the size of the ventilation device.

[0022] According to one aspect of the invention, the bladed member comprises the retention means.

[0023] According to one aspect of the invention, the retention means are arranged on the counter-impression of the blade member.

[0024] According to one aspect of the invention and according to a variant, the torque transmission part, preferably the first section, comprises the retention means.

[0025] According to one aspect of the invention, the retention means comprise a skirt, the skirt comprises a first part connected to the blade member and extending radially to the axis of rotation and a second part connected to the first part and extending parallel to the peripheral wall in the direction of the torque transmission part.

[0026] According to one aspect of the invention, the skirt and the peripheral wall are spaced apart from each other so as to form a space between the second part of the skirt and the peripheral wall. It is thus understood that the skirt and the peripheral wall do not touch each other and that the space between them forms a void.

[0027] According to one aspect of the invention, the space between the skirt and the peripheral wall is less than or equal to 2 millimeters.

[0028] According to one aspect of the invention, the retention means are sealing means configured to seal the first section of the torque transmission part.

[0029] According to one aspect of the invention, the sealing means comprise a sealing lip configured to cooperate with the peripheral wall.

[0030] According to one aspect of the invention, the sealing means comprise an annular seal configured to cooperate with the peripheral wall.

[0031] According to one aspect of the invention, the lip is in contact with an inner wall of the peripheral wall oriented towards the axis of rotation in order to ensure the sealing of the first section. It is thus understood that the lip is surrounded by the peripheral wall. According to one aspect of the invention, the lip is in contact with an outer wall of the peripheral wall in order to ensure the sealing of the first section. It is thus understood that the lip surrounds the peripheral wall.

[0032] According to one aspect of the invention, the lip is in contact with an upper end of the peripheral wall in order to ensure the sealing of the first section.

[0033] According to one aspect of the invention, the sealing means are arranged on the peripheral wall and cooperate with the counter-impression of the blade member.

[0034] According to one aspect of the invention, the sealing means extend from an inner wall of the peripheral wall.

[0035] According to one aspect of the invention, the sealing means extend from an outer wall of the peripheral wall.

[0036] According to one aspect of the invention, the retention means are integral with the counter-impression of the blade member or integral with the torque transmission part.

[0037] According to one aspect of the invention, the retention means are overmolded with the counter-impression of the blade member or with the torque transmission part.

[0038] According to one aspect of the invention, the retention means are molded with the counter-impression of the blade member or with the torque transmission part by a two-material molding.

[0039] According to one aspect of the invention, the retention means are attached to the counter-impression of the blade member or to the torque transmission part.

[0040] According to one aspect of the invention, the retention means are fixed by gluing to the counter-impression or to the torque transmission part.

[0041] According to one aspect of the invention, the retention means are mounted in a circular groove positioned on the counter-impression or on the peripheral wall of the torque transmission part.

[0042] According to one aspect of the invention, the counter-impression of the blade member is an added part.

[0043] According to one aspect of the invention, the counter-impression is assembled to the blade member by fixing means (screw, rivet, clip, etc.).

[0044] According to one aspect of the invention, the blade member comprises a shaft configured to be housed in a hub inserted by overmolding in the counter-impression.

[0045] According to one aspect of the invention, the second section is a mechanical attachment by means of fastening means (screw, rivet, clip, etc.). According to one aspect of the invention, the first section is closer to the axis of rotation than the second section. It is understood that the first section is arranged more in the center of the torque transmission part than the second section, which surrounds the first section.

[0046] Brief description of the drawings

[0047] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below for information purposes in relation to drawings in which:

[0048] [Fig 1] is a schematic sectional view of a cooling module according to an exemplary application of the invention;

[0049] [Fig 2] is a schematic view of a ventilation device according to the prior art;

[0050] [Fig 3] is a schematic view of the torque transmission part according to the invention with the retention means;

[0051] [Fig 4] is a schematic sectional view of the torque transmission part with the retention means according to a first embodiment of the invention;

[0052] [Fig 5] is a schematic sectional view of the torque transmission part with the retention means according to a second embodiment of the invention;

[0053] [Fig 6] is a schematic sectional view of the torque transmission part with the retention means according to an alternative of the second embodiment of the invention;

[0054] [Fig 7] is a schematic sectional view of the torque transmission part with the retention means according to another alternative of the second embodiment of the invention. It should first be noted that if the figures set out the invention in detail for its implementation, these figures can of course be used to better define the invention where appropriate. It should also be noted that these figures only set out a few examples of embodiments of the invention.

[0055] Detailed description

[0056] Figure 1 describes an example of application of the invention, in particular a cooling module 50 of a motor vehicle, in particular with an electric motor. As illustrated in this figure 1 in section, the cooling module 50 comprises a housing or fairing 200 forming an internal channel 300. The housing 200 makes it possible to house at least one heat exchanger 400 as well as a ventilation device 100 according to an example embodiment of the invention. This ventilation device 100 comprises a bladed member 1.

[0057] Figure 2 represents a ventilation device according to the prior art. This ventilation device comprises: • a bladed member 1,

[0058] • an electric motor 2 and

[0059] • a torque transmission part 3 arranged to transmit a torque developed by the electric motor 2 to the bladed member 1, the torque transmission part 3 comprising: o a first section 4 intended to transmit the torque developed by the electric motor 2 from the torque transmission part 3 to the bladed member 1 and o a second section 5 intended to fix the torque transmission part 3 to the electric motor 2.

[0060] According to the invention and as illustrated in Figure 3 to 7, the arrangement of the bladed member 1 with the torque transmission part 3 forming a coupling 6 and the device 100 being characterized in that it comprises retention means 7 configured to retain within the coupling 6 elements produced during the interaction of the bladed member 1 with the torque transmission part 3.

[0061] The blade member 1 and / or the torque transmission part 3 comprise the retention means 7.

[0062] The blade member 1 and the torque transmission part 3 in operation rotate around an axis of rotation 8, the retention means 7 are arranged all around the axis of rotation 8. It is thus understood that the retention means 7 extend circularly around the axis of rotation 8.

[0063] The torque transmission part 3 comprises a peripheral wall 9 arranged to cooperate with the retention means 7.

[0064] The torque transmission part 3 comprises a first face 30 oriented towards the blade member 1 and a second face 31 oriented towards the electric motor 2, the peripheral wall 9 extending from the first face 30 towards the outside.

[0065] The peripheral wall 9 extends perpendicular to the first face 30 of the torque transmission part 3.

[0066] The first section 4 comprises an imprint 10 arranged to transmit the torque to a counter-imprint 11 of the blade member 1.

[0067] The peripheral wall 9 extends circularly relative to the axis of rotation 8 so as to surround the imprint 10 of the first section 4. The retention means 7 are smaller than the blade member 1 as well as the torque transmission part 3. This makes it possible to maintain the size of the ventilation device 100.

[0068] As illustrated in Figures 3 to 7, the blade member 1 comprises the retention means 7. The retention means 7 are arranged on the counter-impression 11 of the blade member 1. According to an alternative not illustrated by the figures, the torque transmission part 3, preferably the first section 4, comprises the retention means 7.

[0069] According to a first embodiment of the invention as illustrated in Figure 4, the retention means 7 comprise a skirt 70, the skirt 70 comprises a first part 700 connected to the blade member 1 and extending radially to the axis of rotation 8 and a second part 701 connected to the first part 700 and extending parallel to the peripheral wall 9 in the direction of the torque transmission part 3.

[0070] The skirt 70 and the peripheral wall 9 are distant from each other so as to form a space 12 between the second part 701 of the skirt 70 and the peripheral wall 9. It is thus understood that the skirt 70 and the peripheral wall 9 do not touch each other and that the space 12 between them forms a void.

[0071] The space 12 between the skirt 70 and the peripheral wall 9 is less than or equal to 2 millimeters.

[0072] According to a second embodiment of the invention as illustrated in Figures 5 to 7, the retention means 7 are sealing means 7 configured to seal the first section 4 of the torque transmission part 3.

[0073] The sealing means 7 comprise a sealing lip 71 configured to cooperate with the peripheral wall 9.

[0074] According to a variant not shown in the figures, the sealing means 7 comprise an annular seal 72 configured to cooperate with the peripheral wall 9.

[0075] In the case where the blade member 1 comprises the sealing means 7, three configurations are possible. According to a first configuration and as visible in Figure 5, the lip 71 is in contact with an inner wall 90 of the peripheral wall 9 oriented towards the axis of rotation 8 in order to ensure the sealing of the first section 4. It is thus understood that the lip 71 is surrounded by the peripheral wall 9.

[0076] According to a second configuration and as visible in Figure 6, the lip 71 is in contact with an outer wall 91 of the peripheral wall 9 in order to ensure the sealing of the first section 4. It is thus understood that the lip 71 surrounds the peripheral wall 9. According to a third configuration and as visible in Figure 7, the lip 71 is in contact with an upper end 92 of the peripheral wall 9 in order to ensure the sealing of the first section 4.

[0077] In the case not illustrated where the torque transmission part 3 comprises the sealing means 7, a possible configuration is that the sealing means 7 are arranged on the peripheral wall 9 and cooperate with the counter-impression 11 of the blade member 1. In this case, the sealing means 7 can either extend from an inner wall 90 of the peripheral wall 9, or from an outer wall 91 of the peripheral wall 9. According to a preferred design and as illustrated in FIGS. 3 to 7, the retention means 7 are integral with the counter-impression 11 of the blade member 1 or integral with the torque transmission part 3.

[0078] Other designs are possible and according to which:

[0079] • the retention means 7 are overmolded with the counter-impression 11 of the blade member 1 or with the torque transmission part 3.

[0080] • the retention means 7 are molded with the counter-impression 11 of the blade member 1 or with the torque transmission part 3 by a two-material molding.

[0081] • the retention means 7 are attached to the counter-impression 11 of the blade member 1 or to the torque transmission part 3.

[0082] • the retention means 7 are fixed by gluing to the counter-impression 11 or to the torque transmission part 3.

[0083] • the retention means 7 are mounted in a circular groove 13 positioned on the counter-impression 11 or on the peripheral wall 9 of the torque transmission part 3.

[0084] As illustrated in the figures, the counter-impression 11 of the blade member 1 is an added part. The blade member 1 comprises a shaft 14 not visible in the figures and configured to be housed in a hub 15 inserted by overmolding in the counter-impression 11. Alternatively, still for the case where the counter-impression 11 is an added part on the blade member 1, the counter-impression 11 is assembled to the blade member 1 by fixing means (screw, rivet, clip, etc.). It is also possible, although not illustrated by the figures, to have the counter-impression 11 in one piece with the blade member 1 by overmolding directly on the shaft 14 of the blade member 1.

[0085] The second section 5 is a mechanical attachment to the electric motor 2 by means of fixing means (screw, rivet, clip etc.). The first section 4 is closer to the axis of rotation 8 than the second section 5. It is understood that the first section 4 is arranged more in the center of the torque transmission part 3 than the second section 5, which surrounds the first section 4.

Claims

CLAIMS 1. Ventilation device (100) comprising: • a bladed organ (1), • an electric motor (2) and • a torque transmission part (3) arranged to transmit a torque developed by the electric motor (2) to the bladed member (1), the torque transmission part (3) comprising: o a first section (4) intended to transmit the torque developed by the electric motor (2) from the torque transmission part (3) to the bladed member (1) and o a second section (5) intended to fix the torque transmission part (3) to the electric motor (2), the arrangement of the bladed member (1) with the torque transmission part (3) forming a coupling (6) and the device (100) being characterized in that it comprises retention means (7) configured to retain within the coupling (6) elements produced during the interaction of the bladed member (1) with the torque transmission part (3).

2. Ventilation device (100) according to the preceding claim, in which the blade member (1) and / or the torque transmission part (3) comprise the retention means (7).

3. Ventilation device (100) according to any one of the preceding claims, wherein the blade member (1) and the torque transmission part (3) in operation rotate around an axis of rotation (8), the retention means (7) are arranged all around the axis of rotation (8).

4. Ventilation device (100) according to any one of the preceding claims, wherein the torque transmission part (3) comprises a peripheral wall (9) arranged to cooperate with the retention means (7).

5. Ventilation device (100) according to any one of the preceding claims, wherein the first section (4) comprises a footprint (10) arranged to transmit the torque to a counter-footprint (11) of the blade member (1).

6. Ventilation device (100) according to any one of claims 2 to 5, wherein the bladed member (1) comprises the retention means (7).

7. Ventilation device (100) according to any one of claims 2 to 5, wherein the torque transmission part (3), preferably the first section (4), comprises the retention means (7).

8. Ventilation device (100) according to any one of the preceding claims in combination with claim 4, wherein the retaining means (7) comprise a skirt (70), the skirt (70) comprises a first part (700) connected to the blade member (1) and extending radially to the axis of rotation (8) and a second part (701) connected to the first part (700) and extending parallel to the peripheral wall (9) in the direction of the torque transmission part (3).

9. Ventilation device (100) according to any one of claims 1 to 7, wherein the retention means (7) are sealing means (7) configured to seal the first section (4) of the torque transmission part (3).

10. Ventilation device (100) according to the preceding claim, wherein the sealing means (7) comprise a sealing lip (71) configured to cooperate with the peripheral wall (9).

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