Ventilation device for a motor vehicle cooling module

Abstract

The invention relates to a ventilation device (5) for a cooling module of a motor vehicle, comprising: 1. a blade bearing member (6); 2. an electric motor (7); 3. a torque transmission component (8) arranged to transmit torque generated by the electric motor (7) to the blade bearing member (6); characterized in that the torque transmission component (8) comprises: a. a first attachment assembly for attaching the torque transmission component (8) to the blade bearing member (6); b. and a second attachment assembly for attaching the torque transmission component (8) to the electric motor (7).

Description

Technical Field

[0001] This invention relates to a ventilation device for a cooling module in a motor vehicle, particularly an electric vehicle. The invention also relates to such a cooling module and a motor vehicle, particularly an electric vehicle, equipped with such a cooling module. Background Technology

[0002] A motor vehicle's cooling module (or heat exchange module) typically has at least one heat exchanger and a ventilation device designed to generate an airflow in contact with the at least one heat exchanger. Thus, the ventilation device allows for the generation of an airflow in contact with the heat exchanger, for example, when the vehicle is stationary.

[0003] In conventional motor vehicles with combustion engines, the at least one heat exchanger has a substantially square shape, and the ventilation device is a blower impeller fan whose diameter is substantially equal to the side length of the square formed by the heat exchanger.

[0004] Traditionally, the heat exchanger is then positioned facing at least two cooling openings formed in the front face of the vehicle body. The first cooling opening is located above the bumper, while the second opening is located below the bumper. This configuration is preferred because the combustion engine must also be supplied with air, and the engine's air intake is typically located in a passageway through which the airflow passes through the upper cooling opening.

[0005] However, electric vehicles are preferably provided with only a cooling opening located below the bumper, and more preferably, a single cooling opening located below the bumper.

[0006] This is because electric motors do not require an air supply. The reduced number of cooling openings also allows for improved aerodynamics in electric vehicles. This, in turn, leads to better autonomy and higher top speeds in motor vehicles.

[0007] The present invention aims to improve this cooling module. Summary of the Invention

[0008] The subject of this invention is a ventilation device for a cooling module of a motor vehicle, comprising:

[0009] Blade-type components;

[0010] electric motor;

[0011] A torque transmission component is arranged to transmit torque generated by an electric motor toward a bladed member; characterized in that the torque transmission component has:

[0012] A first fixing component is used to fix the torque transmission component to the bladed member;

[0013] And a second fixing component for fixing the torque transmission component to the electric motor.

[0014] Therefore, in this invention, the torque transmission component advantageously allows for easier mounting of the bladed member onto the motor, particularly by means of a first fixing component, without screws, while still transmitting the torque generated by the electric motor and without reducing its cooling. The second fixing component allows for a reduction in the size of the torque transmission component by assembling it onto the motor separately from mounting the bladed member onto the torque transmission component. Thus, the torque transmission component can be pre-installed on the motor before the bladed member is assembled onto it. The first and second fixing components also ensure good concentricity of the components, thereby ensuring good rotation at high speeds.

[0015] According to one aspect of the invention, the first fixing component and the second fixing component are at different distances from the rotation axis of the electric motor.

[0016] According to one aspect of the invention, the second fixing component is further away from the rotation axis of the electric motor than the first fixing component.

[0017] According to one aspect of the invention, the first fixing component has a recessed central post located at the center of the torque transmission component.

[0018] According to one aspect of the invention, the central post is wider at its base than at its free end.

[0019] According to one aspect of the invention, the bladed member has a guide pad that extends along the rotation axis of the electric motor and can be inserted into the central column.

[0020] According to one aspect of the invention, the guide pad extends from the plate.

[0021] According to one aspect of the invention, the bladed member has a first retaining tab arranged to interact with a first fixing component.

[0022] According to one aspect of the invention, the first retaining plate has an L-shaped form. This shape allows all degrees of freedom to be closed, so that the bladed component can be well mounted on the torque transmission component.

[0023] According to one aspect of the invention, a first retaining piece is attached from the plate to the bladed member.

[0024] According to one aspect of the invention, the first retaining plate has an anti-rotation wall to prevent the bladed component from being detached from the torque transmission component.

[0025] According to one aspect of the invention, the first retaining plate has an axial retaining wall positioned parallel to the plate. The axial direction should be understood as the rotation axis of the electric motor.

[0026] According to one aspect of the invention, the axial retaining wall has a surface that is slightly inclined with respect to a plane extending radially relative to the axis of rotation of the electric motor, and this surface is positioned facing the plate.

[0027] According to one aspect of the invention, the slightly inclined surface forms an angle between 3 and 5 degrees with respect to a plane that extends radially relative to the axis of rotation of the electric motor.

[0028] According to one aspect of the invention, a first fixing component has a window and a contact area through which an anti-rotation wall extends from the lip of the window, the contact area extending from the lip of the window, and an axially retaining wall with an inclined surface bearing against the contact area to ensure a tight hold in position.

[0029] According to one aspect of the invention, the window has two edges with a circular cross-sectional shape, and these cross-sections are connected to each other by two straight edges.

[0030] According to one aspect of the invention, the contact area is a planar surface included in a first plane, which is longitudinally remote from a second plane including the free end of the central post.

[0031] According to one aspect of the invention, the plate with the blade member has at least one protrusion, preferably two protrusions, extending toward a slightly inclined surface of the retaining plate to ensure that the torque transmission member is tightly mounted.

[0032] According to one aspect of the invention, the bladed member has a second retaining plate having the same features as the first retaining plate.

[0033] According to one aspect of the invention, the first fixing component has a snap-fit ​​fastening element for locking the rotation of the bladed member.

[0034] According to one aspect of the invention, the snap-fit ​​fastening element is attached to the torque transmission member from a longitudinal wall extending between a first plane and a second plane.

[0035] According to one aspect of the invention, the plate with the blade member has a locking lug on which a snap-fit ​​fastening element is locked.

[0036] According to one aspect of the invention, the locking lug has a guide bevel for guiding the snap-fit ​​fastening element.

[0037] According to one aspect of the invention, the snap-fit ​​fastening element has a snap-fit ​​fastening head that, after passing through the guide ramp, locks onto the locking lug under the elastic return action of the snap-fit ​​fastening head.

[0038] According to one aspect of the invention, the snap-fit ​​fastening element has a curve.

[0039] According to one aspect of the invention, the bladed member has a base.

[0040] According to one aspect of the invention, the plate is attached to the base by ribs.

[0041] According to one aspect of the invention, the rib extends radially from the rotating shaft of the electric motor.

[0042] According to one aspect of the invention, the torque transmission component is a component with an overall disc shape, the lip of which includes a skirt extending longitudinally relative to the rotation axis of the electric motor. The skirt allows for reinforcement of the torque transmission component.

[0043] According to one aspect of the invention, the torque transmission component is made of a plastic material.

[0044] According to one aspect of the invention, the bladed component is made of a plastic material.

[0045] According to one aspect of the invention, the second fixing component has at least one aperture arranged to receive at least one screw to be screwed onto an electric motor. The use of a screw allows for standard installation.

[0046] According to one aspect of the invention, the screw has a screw head and threads.

[0047] According to one aspect of the invention, the orifice is provided on the truncated cone.

[0048] According to one aspect of the invention, the truncated cone has a planar end that supports an electric motor.

[0049] According to one aspect of the invention, the truncated cone has a cylindrical receiving portion for receiving a screw head.

[0050] According to one aspect of the invention, when the screw is in the position to be screwed onto the electric motor, the screw head is fully accommodated in the cylindrical receiving portion.

[0051] According to one aspect of the invention, the second fixing component has three orifices, each orifice arranged to receive a screw to be screwed onto the electric motor.

[0052] According to one aspect of the invention, the torque transmission component has at least one opening between the two orifices. This opening allows for weight reduction of the torque transmission component and enables effective cooling of the electric motor.

[0053] According to one aspect of the invention, there are three openings between the two orifices.

[0054] According to one aspect of the invention, the electric motor is a brushless DC type.

[0055] According to one aspect of the invention, the electric motor has a stator and a rotor.

[0056] According to one aspect of the invention, the rotor has at least one opening that is aligned with an opening in the torque transmission component.

[0057] According to one aspect of the invention, the at least one opening in the rotor and the at least one opening in the torque transmission component have the same shape.

[0058] According to one aspect of the invention, the rotor has the shape of a flat-bottomed clock.

[0059] According to one aspect of the invention, the electric motor has at least one thread facing the at least one orifice for screwing a screw onto the electric motor and holding the torque transmission component in place.

[0060] According to one aspect of the invention, the at least one screw is screwed onto the rotor of the electric motor.

[0061] According to one aspect of the invention, the second fixing component has at least one guide finger for aligning the at least one orifice with the at least one thread.

[0062] According to one aspect of the invention, the rotor has at least one guide hole for receiving the at least one guide finger.

[0063] According to one aspect of the invention, the bladed component is a tangential blower impeller configured to generate an airflow flowing in a direction substantially perpendicular to the axis of rotation of the electric motor.

[0064] Another subject of the invention is a cooling module having a ventilation device and a heat exchanger located in the path of the air generated by the ventilation device.

[0065] Another subject of the present invention is a method for assembling a ventilation device for a cooling module in a motor vehicle, the method comprising the following assembly steps:

[0066] The first step is to pre-assemble the torque transmission components onto the electric motor via threaded connections.

[0067] The second step is to insert the guide pad with the blade component into the recessed central column of the torque transmission component;

[0068] The third step involves locking the bladed component onto the torque transmission component by performing a rotational motion until a snap-fit ​​fastening occurs. Attached Figure Description

[0069] Other features, details, and advantages of the invention will become apparent from the following detailed description and analysis of the accompanying drawings, in which:

[0070] [ Figure 1 A cross-sectional view of a cooling module according to an exemplary embodiment of the present invention is shown schematically.

[0071] [ Figure 2 ]yes Figure 1 A schematic perspective view of the ventilation system for the cooling module;

[0072] [ Figure 3 ]yes Figure 2 A schematic perspective view of a louvered component of a ventilation device;

[0073] [ Figure 4 ]yes Figure 3 A schematic diagram of the first retaining plate of the bladed component;

[0074] [ Figure 5 ]yes Figure 2 A schematic perspective view of the torque transmission component of the ventilation device;

[0075] [ Figure 6 [This refers to the process of assembling bladed components.] Figure 5 A schematic perspective view of a bladed component on a torque transmission part;

[0076] [ Figure 7 ]yes Figure 2 A schematic front view of the rotor of the electric motor of the ventilation device;

[0077] [ Figure 8 ] is assembled in Figure 2 A cross-sectional schematic diagram of the torque transmission component on the rotor of the electric motor of the ventilation device. Detailed Implementation

[0078] Figure 1 A cooling module 1 for a motor vehicle is described, specifically one incorporating an electric motor. As such... Figure 1 As shown in the cross-section, the cooling module 1 has a housing or shroud 2 forming an internal channel 3. The housing 2 allows for the accommodation of at least one heat exchanger 4 and a ventilation device 5 according to an exemplary embodiment of the invention. The ventilation device 5 has bladed members 6.

[0079] Figure 2 It shows Figure 1 The ventilation device 5 includes:

[0080] Component 6 with blades;

[0081] Electric motor 7;

[0082] A torque transmission component 8 is arranged to transmit the torque 9 generated by the electric motor 7 toward the bladed member 6; characterized in that the torque transmission component 8 has:

[0083] The first fixing component 10 is used to fix the torque transmission component 8 to the bladed component 6;

[0084] And a second fixing component 11 for fixing the torque transmission component 8 to the electric motor 7.

[0085] Figure 3 and Figure 5 The bladed component 6 and the torque transmission component 8 are shown respectively. As shown, the first fixing component 10 and the second fixing component 11 are at different distances from the rotation axis 12 of the electric motor 7.

[0086] The second fixing component 11 is farther from the rotation axis 12 of the electric motor 7 than the first fixing component 10.

[0087] The first fixing component 10 has a recessed central column 13 located at the center of the torque transmission component 8.

[0088] The base of the central column 13 is wider than its free end.

[0089] The bladed component 6 has a guide pad 14 that extends along the rotation axis 12 of the electric motor 7 and can be inserted into the central column 13.

[0090] The guide pad 14 extends from the plate 15.

[0091] The bladed member 6 has a first retaining piece 16 arranged to interact with the first fixing component 10. Figure 4 This is a detailed view of the bladed component 6, in which the first retaining plate 16 is particularly visible.

[0092] The first retaining piece 16 has an L-shaped form.

[0093] The first retaining plate 16 is attached from the plate 15 to the bladed member 6.

[0094] The first retaining plate 16 has an anti-rotation wall 17 to prevent the bladed component 6 from being detached from the torque transmission component 8.

[0095] The first retaining plate 16 has an axial retaining wall 18 positioned parallel to the plate 15. The axial direction should be understood as the rotation axis 12 of the electric motor 7.

[0096] The axial retaining wall 18 has a surface 19 that is slightly inclined relative to a plane 20 that extends radially relative to the axis of rotation 12 of the electric motor 7, and the surface 19 is positioned facing the plate 15.

[0097] The slightly inclined surface 19 forms an angle 53 with respect to the plane 20, which is preferably between 3 and 5 degrees, and the plane 20 extends radially with respect to the rotation axis 12 of the electric motor 7.

[0098] The first fixing component 10 has a window 21 and a contact area 22, an anti-rotation wall 17 passing through the window 21, the contact area 22 extending from the lip 23 of the window 21, and an inclined surface 19 of an axially retaining wall 18 supporting the contact area 22 to ensure a tight hold in position.

[0099] Window 21 has two edges 24 with a circular cross-section shape, and these cross-sections 24 are connected to each other by two straight edges 25.

[0100] The contact area 22 is a planar surface contained in the first plane 26, which is longitudinally away from the second plane 27, which includes the free end of the central column 13.

[0101] The plate 15 with blade member 6 has at least one protrusion 28, preferably two protrusions, which extend toward the slightly inclined surface 19 of retaining plate 16 to ensure that the torque transmission member 8 is tightly installed.

[0102] The bladed member 6 has a second retaining plate 29, which has the same features as the first retaining plate 16.

[0103] The first fixing component 10 has a snap-fit ​​fastening element 30 for locking the rotation of the bladed member 6.

[0104] The snap-fit ​​fastening element 30 is attached to the torque transmission component 8 from the longitudinal wall 31 extending between the first plane 26 and the second plane 27.

[0105] The plate 15 with blade member 6 has a locking lug 32, on which the snap fastening element 30 is locked.

[0106] The locking lug 32 has a guide bevel 33 for guiding the snap fastening element 30.

[0107] The snap-fit ​​fastening element 30 has a snap-fit ​​fastening head 34, which, after passing through the guide ramp 33, locks onto the locking lug 32 under the elastic recovery action of the snap-fit ​​fastening head 34. Figure 6 As shown.

[0108] The snap-fit ​​fastening element 30 has a curve 35.

[0109] The bladed component 6 has a base 36.

[0110] Plate 15 is attached to base 36 via rib 37.

[0111] Rib 37 extends radially from the rotation axis 12 of the electric motor 7.

[0112] The torque transmission component 8 is a disc-shaped component with a lip including a skirt 38 extending longitudinally relative to the rotation axis 12 of the electric motor 7. The skirt 38 allows for reinforcement of the torque transmission component 8.

[0113] The torque transmission component 8 is made of plastic.

[0114] The bladed component 6 is made of plastic material.

[0115] The second fixing component 11 has at least one aperture 39 arranged to receive at least one screw 40, which will be screwed onto the electric motor 7.

[0116] Screw 40 has a screw head 41 and threads 42.

[0117] The orifice 39 is located on the truncated cone 43.

[0118] The truncated cone 43 has a planar end 44, which supports and abuts against the electric motor 7.

[0119] The truncated cone 43 has a cylindrical receiving portion 45 for accommodating the screw head 41, as particularly in Figure 8 It can be seen in the image.

[0120] When the screw 40 is in the position where it is screwed into the electric motor 7, the screw head 41 is fully accommodated in the cylindrical receiving portion 45.

[0121] The second fixing component 11 has three openings 39, each opening 39 being arranged to receive a screw 40 to be screwed onto the electric motor 7.

[0122] The torque transmission component 8 has at least one opening 46 between the two orifices 39. This opening 46 allows for a reduction in the weight of the torque transmission component 8 and enables effective cooling of the electric motor 7.

[0123] There are three openings 46 between the two orifices 39.

[0124] The electric motor 7 is a brushless DC type.

[0125] The electric motor 7 has a stator 47 and a rotor 48.

[0126] exist Figure 7 The rotor 48, shown separately, has at least one opening 49 that aligns with the opening 46 in the torque transmission component 8, particularly in Figure 8 As you can see.

[0127] At least one opening in the rotor 49 and at least one opening 46 in the torque transmission component 8 have the same shape.

[0128] Rotor 48 has the shape of a flat-bottomed clock.

[0129] The electric motor 7 has at least one thread 50 facing at least one orifice 39 for screwing a screw 40 onto the electric motor 7 and holding the torque transmission component 8 in place.

[0130] The at least one screw 40 is screwed onto the rotor 48 of the electric motor 7.

[0131] The second fixing component 11 has at least one guide finger 51 for aligning the at least one orifice 39 with the at least one thread 50.

[0132] The rotor 48 has at least one guide hole 52 for receiving the at least one guide finger 51.

[0133] The bladed component 6 is a tangential blower impeller, which is configured to generate an airflow in a direction substantially perpendicular to the rotation axis 12 of the electric motor 7.

[0134] The cooling module 1 has a ventilation device 5 according to an exemplary embodiment of the present invention, and a heat exchanger 4 located in the path of the air generated by the ventilation device 5.

[0135] A method for assembling a ventilation device 5 for a cooling module 1 of a motor vehicle, the method comprising the following assembly steps:

[0136] The first step is to pre-assemble the torque transmission component 8 onto the electric motor 7 via a threaded connection.

[0137] The second step is to insert the guide pad 14 with blade component 6 into the recessed central column 13 of torque transmission component 8;

[0138] The third step involves locking the bladed component 6 onto the torque transmission component 8 by performing a rotational motion until a snap-locking action occurs.

Claims

1. A ventilation device (5) for a cooling module (1) of a motor vehicle, comprising: a. Blade-equipped component (6); b. Electric motor (7); c. A torque transmission component (8) arranged to transmit torque (9) generated by the electric motor (7) toward the bladed member (6); characterized in that the torque transmission component (8) has: i. A first fixing component (10) for fixing the torque transmission component (8) to the bladed component (6); ii. A second fixing component (11) for fixing the torque transmission component (8) to the electric motor (7), the second fixing component (11) having at least one orifice (39) arranged to receive at least one screw (40) which will be screwed into the electric motor (7). The first fixing component (10) of the torque transmission component (8) includes a recessed central post (13), and the bladed component (6) includes a guide pad (14) configured to be inserted into the recessed central post (13). The bladed component (6) is locked onto the torque transmission component (8) by rotational movement and then snap-fit.

2. In the ventilation device (5) according to claim 1, the first fixing component (10) and the second fixing component (11) are at different distances from the rotation axis (12) of the electric motor (7).

3. The ventilation device (5) according to claim 2, wherein the bladed member (6) is a tangential blower impeller configured to generate an airflow in a direction substantially perpendicular to the rotation axis (12) of the electric motor (7).

4. The ventilation device (5) according to any one of claims 1 to 3, wherein the first fixing component (10) has a recessed central column (13) located at the center of the torque transmission component (8).

5. The ventilation device (5) according to any one of claims 1 to 3, wherein the bladed member (6) has a first retaining plate (16) arranged to interact with the first fixing assembly (10).

6. The ventilation device (5) according to any one of claims 1 to 3, wherein the first fixing component (10) has a snap-fit ​​fastening element (30) for locking the rotation of the bladed member (6).

7. The ventilation device (5) according to any one of claims 1 to 3, wherein the bladed member (6) has a base (36).

8. The ventilation device (5) according to any one of claims 1 to 3, wherein the electric motor (7) has a stator (47) and a rotor (48).

9. A method for assembling a ventilation device (5) for a cooling module (1) for a motor vehicle according to any one of claims 1 to 8, the method comprising the following assembly steps: a. The first step is to pre-assemble the torque transmission component (8) onto the electric motor (7) via a threaded connection; b. In the second step, the guide pad (14) with blade component (6) is inserted into the recessed central column (13) of torque transmission component (8); c. The third step is to lock the bladed component (6) onto the torque transmission component (8) by performing a rotational motion until a snap-fit ​​fastening occurs.

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