Ventilation device for a motor vehicle cooling module

Abstract

The invention relates to a ventilation device (2) comprising:-a blade member (4) comprising an outer shell (8) for protecting a blade (6), the outer shell (8) consisting of a lower half shell (8a) assembled to an upper half shell (8b); an electric motor (3) comprising a rotor from which a shaft (5) extends along an axis X and rotates the blade member (4); -a bearing (9) for guiding the shaft (5), supported by a cylindrical bearing surface (18) formed in said housing (8) upstream of the blades (6) and extending in a plane perpendicular to the axis X, characterized in that the ventilation device comprises means for holding the bearing (9) in place in the bearing surface (18), the device is interposed between the bearing (9) and the bearing surface (18), only these holding means are in contact with the outer ring (9a) of the bearing (9), which holding means absorb any dimensional change in the bearing surface (18).

Description

Technical Field

[0001] The invention relates to a ventilation device for a cooling module, for example for a motor vehicle, in particular an electric motor vehicle. Background Art

[0002] A cooling module (or heat exchange module) of a motor vehicle generally has at least one heat exchanger and a ventilator which is designed to generate an air flow in contact with the heat exchanger when the vehicle is stationary or traveling at low speed.

[0003] In a motor vehicle with a conventional internal combustion engine, a heat exchanger is placed opposite at least two cooling openings formed in the front face of the motor vehicle body. A first cooling opening is positioned above the bumper and a second opening is positioned below the bumper. This configuration is preferred because the internal combustion engine must also be supplied with air, the air intake of the engine being usually positioned in the path of the air flow passing through the upper cooling opening.

[0004] However, the electric vehicle is preferably provided with only cooling openings positioned below the bumper, and more preferably with a single cooling opening positioned below the bumper.

[0005] Specifically, the electric motor does not need to be supplied with air. Furthermore, the reduction in the number of cooling openings allows the aerodynamic properties of the electric vehicle to be improved. This also leads to better autonomy and a higher top speed for the motor vehicle.

[0006] In order to accommodate a smaller number of cooling openings, components with tangential blades should in particular be used in order to create an air path towards the cooling module.

[0007] The member with the tangential blades is driven in rotation by an electric motor via a shaft. The shaft is precisely positioned relative to the blade member, in particular via rolling bearings mounted in cylindrical bearing surfaces provided for this purpose in the housing of the blade member. The inner diameter of the bearing surface must be very precise, in the order of 1 / 100 mm, in order to perfectly clamp the rolling bearing and to make its positioning ideal for correct guidance of the shaft.

[0008] However, the material used to make the housing is plastic, which does not allow for this level of precision. In addition, plastic will deform and expand over time and with changes in ambient temperature.

[0009] Furthermore, the housing is usually formed of two half shells which together form a cylindrical bearing surface. Therefore, there is a risk that the cylindrical shape of the bearing surface cannot be controlled, which would result in a clearance between the bearing surface and the rolling bearing. However, when the shaft rotates, the movement of the rolling bearing in the bearing surface could result in wear, misalignment or noise.

[0010] The invention aims to improve the ventilation device of an electric motor vehicle by proposing an innovative solution for optimal positioning of the rolling bearing in the bearing surface and for retaining it in the bearing surface despite dimensional changes of the plastic half shells during assembly and their deformation and expansion over time due to changing temperature conditions. Summary of the invention

[0011] The subject of the invention is a ventilation device extending in an axial direction X and comprising:

[0012] - a blade member comprising a housing for protecting the blade, the housing consisting of a lower half shell joined to an upper half shell;

[0013] - an electric motor comprising a rotor from which a shaft extends along an axis X and drives the blade members in rotation;

[0014] - a rolling bearing for guiding the shaft, having an outer ring supported by a cylindrical bearing surface formed in the casing upstream of the blades and extending in a plane perpendicular to the axis X, the bearing surface consisting of a semi-cylindrical lower part formed in the lower half-shell and a semi-cylindrical upper part formed in the upper half-shell,

[0015] The main feature of the device is that it has devices for holding the rolling bearing in the proper position in the bearing surface, which are inserted between the rolling bearing and the bearing surface, and only these holding devices are in contact with the outer ring of the rolling bearing, and the holding devices absorb any dimensional changes in the lower and upper parts of the bearing surface.

[0016] The main idea of ​​the invention is to add retaining means between the outer ring of the rolling bearing and the bearing surface. Thus, it is no longer the bearing surface that is in contact with the rolling bearing, but the retaining means that are in contact with the rolling bearing. Thus, there are one or more intermediate parts whose function is to hold the rolling bearing firmly in place in the bearing surface, even in the case where there may be a gap between the rolling bearing and the bearing surface. Such a gap may be due to dimensional changes during the manufacturing process of the two half-shells, or due to long-term deformations and expansions of the plastic forming the two half-shells, these deformations sometimes appearing due to temperature changes in the environment surrounding the blade member.

[0017] These retaining devices thus make it possible to absorb dimensional changes and deformations of the half shells over the long term.

[0018] The retaining device compresses the rolling bearing in order to clamp it and eliminate any possible play. Since there is no longer any play, there is no longer any relative movement, wear or noise between the rolling bearing and the bearing surface.

[0019] The service life of the ventilator is thereby extended and maintenance operations for repositioning the shaft or replacing half-shells are reduced.

[0020] According to various embodiments of the present invention, these embodiments can be used together or separately:

[0021] - Each portion of the bearing surface has a housing arranged to accommodate said retaining means.

[0022] - The retaining means consist of at least one elastic strip of the elastomer type, which is inserted between the outer ring of the rolling bearing and the bearing surface and which is compressed after the housing is closed.

[0023] - The retaining device consists of a lower strip positioned in a housing provided in the lower part of the bearing surface and an upper strip positioned in a housing provided in the upper part of the bearing surface.

[0024] - Each strip has a central area positioned in the circular area of ​​the housing so as to surround half the circumference of the rolling bearing.

[0025] - Each strip has two end tabs extending on either side of a central area and positioned in a flat area of ​​the housing oriented radially relative to the axis, the end tabs of the upper strip bearing against the end tabs of the lower strip after closing of the housing.

[0026] - For each strip, the end tabs have the same length, both strips are identical.

[0027] - For each strip the end tabs have a different length, the two strips are identical.

[0028] - Each strip is provided with at least one locating pin which is inserted into an orifice provided for this purpose in the bearing surface, or conversely, each bearing surface is provided with at least one locating pin which is inserted into an orifice provided for this purpose in the strip.

[0029] - Each strip has at least one area of ​​increased thickness on the outer bearing surface of the rolling bearing.

[0030] The invention also relates to a method for installing a device for holding a rolling bearing in a ventilation device as described above, characterized in that the method comprises the following steps:

[0031] - inserting the lower strip into the housing below the bearing surface of the lower half shell and the upper strip into the housing above the bearing surface of the upper half shell;

[0032] - Insert the rolling bearing into the bearing surface;

[0033] - Position the half shells facing each other;

[0034] - detecting the strips by means of a first sensor detecting the longest end tab of the upper strip and a second sensor detecting the longest end tab of the lower strip;

[0035] - The housing is closed by joining the two half-shells and pressing the strip against the outer ring of the rolling bearing.

[0036] Finally, the invention relates to a cooling module for a motor vehicle having a ventilation device as described above and at least one heat exchanger which is placed in the path of the air generated by the ventilation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Further features and advantages of the present invention will become apparent from reading the following detailed description, and for an understanding of these features and advantages reference will be made to the accompanying drawings, in which:

[0038] Figure 1 is a perspective view of a cooling module for an electric vehicle;

[0039] Figure 2 is a partially exploded perspective detail view of a ventilation device of a cooling module;

[0040] Figure 3 is an exploded perspective view of the installation of a device for retaining a rolling bearing in a lower portion of a bearing surface of a ventilating device;

[0041] Figure 4 is a perspective view of a device for holding a rolling bearing, the rolling bearing being positioned according to Figure 3 In the bearing surfaces of ventilation equipment;

[0042] Figure 5 is a perspective view of a device for holding a rolling bearing, the rolling bearing being positioned in an upper portion of a bearing surface of a ventilating device;

[0043] Figure 6 is a cross-sectional view of a rolling bearing, the rolling bearing being positioned and retained in a bearing surface of a ventilation device by a retaining device;

[0044] Figure 7 Several possible configurations of devices for retaining rolling bearings are shown;

[0045] Figure 8 A first possible configuration for detecting the correct installation of the retaining device in the half-shell is shown;

[0046] Fig. 9 A second possible configuration for detecting the correct installation of the retaining device in the half-shell is shown;

[0047] Fig.10A third possible configuration for checking the correct installation of the retaining device in the half-shell is shown. DETAILED DESCRIPTION

[0048] In the rest of the specification, elements having the same structure or similar functions will be denoted by the same reference numerals.

[0049] In the remainder of the description, axial and radial orientations will be used in a non-limiting manner without reference to the Earth's gravitational field.

[0050] By convention, the "axial" direction corresponds to the main extension direction of the ventilation device, e.g. Figure 1 The “radial” direction is shown as the axis X in the figure, while the “radial” direction is orthogonal to the axial direction.

[0051] Figure 1 An exemplary application of the invention is described, in particular a cooling module 1 for a motor vehicle, in particular a cooling module 1 for a motor vehicle with an electric motor.

[0052] like Figure 1 As shown, the cooling module 1 has a heat exchanger 20 according to an exemplary embodiment of the invention and a ventilation device 2. The ventilation device 2 extends axially along an axis X and has an electric motor 3 associated with a blade member 4 which generates an air path towards the heat exchanger 20.

[0053] Figure 2 The connection between the electric motor 3 and the blade member 4 is shown more precisely. Figure 2 In FIG. 4 , it can be seen that the shaft 5 extends from the rotor of the motor 3 and drives the blade member 4 in rotation.

[0054] The blades 6 are oriented tangentially to an axis X, which corresponds to the axis of rotation of the blade member 4 .

[0055] In order to protect the blades, the ventilation device 2 has a protective housing 8 consisting of a lower half shell 8a and an upper half shell 8b. Figure 2 In the drawing, the half-shells 8a, 8b are exploded so that the connection between the motor 3 and the blade member 8 can be better seen.

[0056] The half-shells 8a, 8b can be nested one inside the other in order to close the housing 8. The lower half-shell 8a serves as a support and the upper half-shell 8b serves as a cover.

[0057] In order to correctly position the shaft 5 between the rotor and the blade elements 4 , the ventilation device 2 has a rolling bearing 9 which is arranged in a cylindrical bearing surface 18 of the housing 8 provided for this purpose.

[0058] More precisely, the cylindrical bearing surface 18 is divided into a semi-cylindrical lower part 18a arranged on the lower half shell 8a and a semi-cylindrical upper part 18b arranged on the upper half shell 8b. Therefore, when the two half shells 8a, 8b are joined, a complete cylindrical bearing surface 18 can be obtained.

[0059] like Figures 3 to 5 As shown, each half-shell 8a, 8b has a lateral arm 7 extending in a plane perpendicular to the axis X and arranged facing the motor 3. The lateral wall 7 is partially delimited by a joint edge 10.

[0060] During closing of the housing 8 , the two joining edges 10 are positioned against each other.

[0061] The joining edge 10 of the lower half shell 8 a is interrupted by a lower portion 18 a of the bearing surface 18 , and the joining edge 10 of the upper half shell 8 b is interrupted by an upper portion 18 b of the bearing surface 18 .

[0062] In particular, this amounts to cutting into each joining edge 10 a semi-cylindrical opening extending in the side wall 7 .

[0063] After the housing 8 is closed, two semi-cylindrical openings arranged facing each other form a bearing surface 18 for accommodating the rolling bearing 9 .

[0064] The half-shells 8a, 8b are made of plastic by any known plastic injection or moulding or other type of technique.

[0065] There may be dimensional variations from one half-shell to the other, so that after the housing 8 has been closed, a play results between the rolling bearing 9 and the bearing surface 18 .

[0066] The half shells 8a, 8b may also deform in the medium and long term due to the forces exerted by the shaft 5 on the rolling bearing 9 or due to temperature changes in the surroundings of the ventilation device 2. These deformations also produce play between the rolling bearing 9 and the bearing surface 18.

[0067] In order to avoid any movement of the rolling bearing 9 in the bearing surface 18 due to possible play for the reasons described above, the invention provides for additional means for retaining the rolling bearing 9 in the bearing surface 18 .

[0068] Figure 3 Retaining means are shown, in this case an elastic strip 13 of the elastomer type, which is inserted between the rolling bearing 9 and the lower part 18 a of the bearing surface 18 .

[0069] In the example given here, there is a lower strip 13 inserted into the lower portion 18a of the bearing surface 18 at the lower half-shell 8a and an upper strip 13 inserted into the upper portion 18b of the bearing surface 18 at the upper half-shell 8b.

[0070] The variant with a single longer strip 13 inserted into both parts of the bearing surface 18 forms part of the scope of the invention and is particularly useful in Figure 7 As shown in Figure E.

[0071] When the housing 8 is closed, the strip 13 presses against the rolling bearing 9 and holds the rolling bearing 9 in place.

[0072] This elastic strip 13 , by virtue of its flexibility and its ability to be compressed, makes it possible to absorb any play that may exist between the rolling bearing 9 and the bearing surface 18 .

[0073] Preferably, each portion of the bearing surface 18 has a housing 11 arranged to accommodate the strip 13 .

[0074] This housing 11 is Figure 3 Clearly shown in.

[0075] This housing 11 consists of a semi-cylindrical region 11 a , which is therefore circular and is intended to surround half of the rolling bearing 9 .

[0076] The strip 13 intended to be housed in this housing 11 has a profile similar to that of the housing 11 , in this case with the central area 14 being placed in the circular area 11 a of the housing 11 .

[0077] The strip 13 may be completely flat before positioning, or it may be pre-formed with its central region 14 already rounded, in this case in the shape of a half moon.

[0078] Advantageously, in order to correctly position the strip 13 in the housing 11 , the circular area 11 a of the housing 11 is extended on either side by two flat areas 11 b which extend in the joining edge 10 .

[0079] Similarly, the strip 13 comprises two end tabs 15 extending on either side of the central area 14 and positioned in two flat areas 11b of the housing 11. The strip 13 is therefore correctly centred in the housing 11.

[0080] The strip 13 has a length and width that allows it to be inserted completely and tightly inside the housing 11 so that it remains correctly in place.

[0081] Optionally, to assist mounting, the strip 13 has a dowel pin 16 provided below the end tab 15 and able to enter an orifice 12 provided for this purpose in the flat zone 11 b of the housing 11 .

[0082] Or conversely, each bearing surface is provided with at least one locating pin which is inserted into an orifice provided for this purpose in the strip 13. Although not shown, this configuration also lies within the scope of the invention.

[0083] This cooperation between the pin and the aperture enables the strip 13 to be captured during processing on the production line as it is held in place.

[0084] According to another alternative falling within the scope of the invention, instead of pins and orifices, each bearing surface could be provided with a flange, the function of which is to hold the strip in place.

[0085] Figure 4 The strip 13 is shown placed in its housing 11 .

[0086] Preferably, the strip 13 has a thickness slightly greater than the depth of the housing 11 so that it extends slightly beyond the bearing surface 18 to ensure that the outer ring 9a of the rolling bearing 9 bears correctly on the strip 13 and not on the bearing surface 18 outside the housing 11 .

[0087] In particular, only the strip 13 bears against the rolling bearing 9 ; no friction may occur with other parts of the half-shells 8 a , 8 b .

[0088] like Figure 3 and Figure 4 As shown, in order to reduce the compressive force of the strip 13 on the outer ring 9a of the rolling bearing 9 during the closing of the housing 8, it is possible to provide a strip 13 with a thickness equal to the depth of the housing 11, so that the strip 13 is substantially flush with the bearing surface 18 and flush with the joining edge 10, and the strip has one or more areas of increased thickness 17, which then extend beyond the bearing surface 18. These areas of increased thickness 17 are located in the central area 14 of the strip 13. In this case, the rolling bearing 9 is supported only on the areas of increased thickness 17 of the strip 13.

[0089] Figure 5 The strip 13 is shown positioned in the upper half 8b of the housing 8. The housing 11 of the upper half 8b is identical to the housing 11 described for the lower half 8a. Figure 3 and Figure 4 The strips of the lower half shell 8a described are identical.

[0090] Figure 6 A rolling bearing 9 is shown, which is positioned in the bearing surface 18 and consists of Figures 3 to 5 The upper and lower strips 13 and 13 described in the embodiment are firmly held. The housing 8 is closed.

[0091] The end tab 15 of the lower strip 13 is in contact with the end tab 15 of the upper strip 13 .

[0092] The rolling bearing 9 generally has an outer ring 9a, an inner ring 9b, and rolling elements 9c inserted in a cage between the two rings 9a, 9b.

[0093] The shaft 5 is tightly mounted in the inner ring 9 b of the rolling bearing 9 .

[0094] The outer ring 9 a of the rolling bearing 9 is compressed by the regions of increased thickness 17 of the lower and upper strips 13 .

[0095] According to another embodiment not shown, the strip 13 has a thickness equal to the depth of the housing 11 so that it is substantially flush with the bearing surface 18 and flush with the joining edge 10, but the width of the housing 11 and the strip 13 is much greater than the width of the rolling bearing 9, and the rolling bearing 9 is correctly centered on the strip 13 so that the rolling bearing 9 does not cover part of the bearing surface 18 outside the housing 11.

[0096] Typically, the strip 13 is designed from a material that retains its elastic properties over a long period of time, has a gripping effect when in contact with the outer ring 9 a of the rolling bearing 9 , and is insensitive to possible temperature changes in the environment of the ventilation device 2 .

[0097] Preferably, the material is an EPDM elastomer.

[0098] Figure 7 A number of possible embodiments of the strip 13 according to the invention are shown.

[0099] In figure A, the strip 13 has a semicircular circular central area 14 and two flat end tabs 15.

[0100] In Figure B, the strip 13 has a semicircular circular central area 14 and two flat end tabs 15. Each tab 15 is provided with a locating pin 16.

[0101] In Figure C, the strip 13 has a semicircular circular central area 14 and two flat end tabs 15. The circular central area 14 is provided with a locating pin 16.

[0102] In Figure D, the strip 13 has a semicircular circular central area 14 and two flat end tabs 15 of different lengths. Thus, there is a short tab 15a and a long tab 15b. One or more locating pins 16 may be added to the tabs 15 or the circular central area 14.

[0103] In figure E, the strip 13 has a circular central area 14 and two flat end tabs 15 of equal length which are able to contact each other after the housing 8 has been closed.

[0104] In the case of FIGS. A to D , two strips 13 are required to hold the rolling bearing 9 .

[0105] In the case of FIG. E , a single strip 13 is sufficient to hold the rolling bearing 9 .

[0106] Figure 8 A method for testing the strap 13 is shown to ensure that the strap 13 is correctly mounted in the housing 11 of the two half-shells 8a, 8b before the housing 8 is closed.

[0107] This method is particularly suitable for Figure 7 FIG. D shows a strip 13 having a long tab 15 b and a short tab 15 a.

[0108] In this case, the first sensor C1 makes it possible to detect the longest tab 15b of the upper strip 13 normally mounted in the upper half-shell 8b. Likewise, the second sensor C2 makes it possible to detect the longest tab 15b of the lower strip 13 normally mounted in the lower half-shell 8a.

[0109] It should be noted that the two strips 13 are identical and are simply reversed since they are positioned opposite each other in the half-shells 8a, 8b.

[0110] From a manufacturing and processing point of view, using two identical strips 13 is feasible.

[0111] If one of the sensors does not detect any tab 15b, this means that the positioning of the strip 13 in the half-shells 8a, 8b has been forgotten. These sensors thus make it possible to monitor the quality during the assembly of the ventilation device 2.

[0112] The installation of the device for retaining the rolling bearing 9 in the ventilation device 2 comprises the following steps:

[0113] - inserting the lower strip 13 into the housing 11 of the lower part 18a of the bearing surface 18 of the lower half-shell 8a and the upper strip 13 into the housing 11 of the upper part 18b of the bearing surface 18 of the upper half-shell 8b;

[0114] - positioning the rolling bearing 9 between the two parts 18a, 18b of the bearing surface 18;

[0115] - Position the half shells 8a, 8b facing each other;

[0116] - detection of the strip 13 by means of a sensor C1 detecting the longest end tab 15 b of the upper strip 13 and a sensor C2 detecting the longest end tab 15 b of the lower strip 13;

[0117] The housing 8 is closed by joining the two half-shells 8 a , 8 b and pressing the strip 13 against the outer ring of the rolling bearing 9 .

[0118] Apertures 21 are provided in the bearing surfaces 18a, 18b so as to enable opening of passage through the scanning area of ​​the sensors.The first obstacle detected by the sensors C1 and C2 will therefore be the strip 13.

[0119] Preferably, the diameter of the orifice 21 is at least 5 mm.

[0120] Fig. 9 Repeated Figure 8 To this are added two sensors C3 and C4 which are able to detect the short tabs 15a of the lower and upper strips 13.

[0121] In this case, two additional orifices 21 are provided in the bearing surfaces 18a, 18b in order to enable access through the scanning areas of the sensors C3 and C4.

[0122] Holes 22 are also provided in the long tabs 15b at the detection areas of the sensors C2 and C4 so that they can detect the short tabs 15a through the long tabs 15b if necessary. This applies in particular to the short tabs 15a of the lower strip 13, which are detected by means of the sensor D3 through the holes 22 of the long tabs 15b of the upper strip 13.

[0123] All the long tabs 15b are provided with such holes 22, so that the strip can be used both as a lower strip 13 and as an upper strip 13. The strips 13 are therefore all identical.

[0124] Fig.10 Another solution is shown for detecting the correct positioning of the strips 13. In this case, each strip 13 comprises a transverse extension 23 at each lateral end.

[0125] In this Fig.10 In the figure, for the sake of clarity, the upper tongue piece 13 is shown in solid lines and the lower tongue piece 13 is shown in dotted lines.

[0126] Thus, the sensors C1 and C3 detect the lateral extension 23 of the upper strip 13 , whereas the sensors C2 and C4 detect the lateral extension 23 of the lower strip 13 .

[0127] In this case, the strips 13 have tabs 15 of the same length. The strips 13 are also identical, since it is sufficient to turn them over to have an upper strip or a lower strip.

[0128] The configurations shown in the cited figures are merely possible and non-limiting examples of the invention, which, on the contrary, incorporates variations in form and design within the scope of a person skilled in the art.

Claims

1. A ventilation device (2), the ventilation device (2) extending in an axial direction X, comprising: - a blade member (4) comprising a housing (8) for protecting the blade (6), the housing (8) consisting of a lower half shell (8a) joined to an upper half shell (8b); - an electric motor (3) comprising a rotor from which a shaft (5) extends along an axis X and drives the blade member (4) in rotation; - a rolling bearing (9) for guiding the shaft (5), the rolling bearing (9) having an outer ring (9a) supported by a cylindrical bearing surface (18) formed in the housing (8) upstream of the blades (6) and extending in a plane perpendicular to the axis X, the bearing surface (18) consisting of a semi-cylindrical lower part (18a) formed in the lower half-shell (8a) and a semi-cylindrical upper part (18b) formed in the upper half-shell (8b), Characterized in that the ventilation device (2) has means for holding the rolling bearing (9) in position in the bearing surface (18), said means being inserted between the rolling bearing (9) and the bearing surface (18), said holding means only being in contact with the outer ring (9a) of the rolling bearing (9), said holding means absorbing any dimensional changes of the lower part (18a) and the upper part (18b) of the bearing surface (18).

2. The device according to claim 1, characterized in that Each portion (18a, 18b) of the bearing surface (18) has a housing (11) for accommodating the retaining device.

3. The device according to any one of the preceding claims, characterized in that The retaining device consists of at least one elastic strip (13) of the elastomer type, which is inserted between the outer ring (9a) of the rolling bearing (9) and the bearing surface (18) and is compressed after the housing (8) is closed.

4. The device according to claim 3, characterized in that The retaining device consists of a lower strip (13) positioned in a housing (11) arranged in a lower part (8a) of the bearing surface (18) and an upper strip (13) positioned in a housing (11) arranged in an upper part (8b) of the bearing surface (18).

5. The device according to any one of claims 3 and 4, characterized in that Each strip (13) has a central area (14) positioned in a circular area (11a) of the housing (11) so as to surround half the circumference of the rolling bearing (9).

6. The device according to claim 5, characterized in that Each strip (13) has two end tabs (15) extending on either side of the central area (14) and positioned in a flat area (11b) of the housing (11), the flat area (11b) being oriented radially relative to the axis (5), the end tabs (15) of the upper strip (13) bearing against the end tabs (15) of the lower strip (13) after the housing (8) is closed.

7. The device according to claim 6, characterized in that For each strip (13), the end tab (15) has the same length, being identical for both strips (13).

8. The device according to any one of claims 6 and 7, characterized in that The end tab (15) has a different length for each strip (13), the two strips (13) being identical.

9. The device according to any one of claims 3 to 8, characterized in that Each strip (13) is provided with at least one locating pin (16) which is inserted into an orifice (12) provided for this purpose in the bearing surface (18), or conversely, each bearing surface (18) is provided with at least one locating pin which is inserted into an orifice provided for this purpose in the strip (13).

10. The device according to any one of claims 3 to 8, characterized in that Each strip (13) has at least one region (17) of increased thickness which bears against an outer bearing surface (9a) of the rolling bearing (9).

11. A method for installing a device for retaining a rolling bearing (9) in a ventilation device (2) as claimed in claim 8, characterized in that The method comprises the following steps: - inserting the lower strip (13) into the housing (11) of the lower part (18a) of the bearing surface (18) of the lower half shell (8a) and inserting the upper strip (13) into the housing (11) of the upper part of the bearing surface (18) of the upper half shell (8b); - inserting the rolling bearing (9) into the bearing surface (18); - positioning the half shells (8a, 8b) facing each other; - detecting the strip (13) by means of a first sensor (C1) detecting the longest end tab (15b) of the upper strip (13) and a second sensor (C2) detecting the longest end tab (15b) of the lower strip (13); - Closing the housing (8) by joining the two half-shells (8a, 8b) and pressing the strip (13) against the outer ring (9a) of the rolling bearing (9).

12. A cooling module (1) for a motor vehicle, having a ventilation device (2) as claimed in any one of claims 1 to 10, and at least one heat exchanger (20) placed in the path of the air generated by the ventilation device (2).

Images