Cooling fan module and motor bearing plate thereof

Abstract

The utility model provides a cooling fan module and a motor bearing plate thereof. The motor bearing plate comprises an injection-molded substrate; and the motor mounting shaft is arranged in the heat conducting plate in a press fit manner. The cooling fan module comprises the motor bearing plate. According to the utility model, the motor bearing plate is only provided with two parts, and only one assembly operation is needed for assembly, so that the manufacturing cost is reduced, and the heat-conducting property of the motor is ensured to be unchanged at the same time.

Description

Technical Field

[0001] This utility model relates to the field of vehicles. Specifically, this utility model relates to a motor support plate for a cooling fan module. Furthermore, this utility model relates to a cooling fan module including the motor support plate. Background Technology

[0002] A vehicle's cooling fan module typically includes a motor support plate, with one side supporting and securing the motor, and the other side mounting a printed circuit board (containing various electronic components to control motor operation). For ease of heat dissipation, the motor support plate is usually a die-cast metal component (e.g., made of aluminum). Furthermore, to protect the printed circuit board from environmental influences, the cooling fan module also includes a printed circuit board cover to seal it. Additionally, the motor support plate includes lead frames for connecting the motor stator winding leads, the printed circuit board, and interface connectors.

[0003] Aluminum die-cast motor carrier plates have the following disadvantages. First, the motor carrier plate is relatively heavy. Second, to mate with other components of the cooling fan module (such as the motor stator, printed circuit board cover, and motor mounting shaft), multiple machining operations are required on the motor carrier plate, such as mounting holes for the motor mounting shaft and sealing surfaces for the printed circuit board cover. This also requires multiple individual components (motor mounting shaft, motor carrier plate base plate, interface connector, lead frame, and sealing material) and multiple assembly operations. Third, sealing components are needed to seal the lead frame relative to the main body of the motor carrier plate. Furthermore, sealing the interface connector requires the use of overmolding materials, such as liquid silicone. All of these factors increase manufacturing costs.

[0004] To reduce the weight of the motor mounting plate and the number of parts, thereby simplifying assembly processes, injection-molded motor mounting plates have emerged, in which the motor mounting shaft is encased in plastic within the mounting plate. This requires a separate encapsulation process. Furthermore, in the case of plastic motor mounting plates, the limited heat dissipation of plastic means that even with thermally conductive filler between the plastic mounting plate and the printed circuit board (PCB), heat dissipation of the PCB is difficult to guarantee, which also increases manufacturing costs.

[0005] Therefore, there is a need to improve the existing motor support plate. Utility Model Content

[0006] The purpose of this invention is to overcome the aforementioned shortcomings of existing motor support plates. Therefore, this invention proposes an improved motor support plate, comprising an injection-molded substrate and a heat-conducting plate coated with plastic onto the substrate, with the motor mounting shaft press-fitted into the heat-conducting plate. According to this invention, the heat-conducting plate of the motor support plate can be made of metal. Compared to aluminum molded motor support plates, the motor support plate of this invention is lighter in weight, and compared to plastic molded motor support plates, the thermal performance of the motor support plate of this invention is improved. Furthermore, the connector and the improved plastic support plate can be integrated, reducing the number of parts and assembly processes. The connector does not require additional sealing, while maintaining the same thermal conductivity of the motor.

[0007] According to an embodiment, there is a slit between the heat-conducting plate and the motor carrier plate substrate, which is filled with potting material to seal the plastic carrier plate and the heat-conducting plate.

[0008] According to an embodiment, the motor carrier plate also includes an interface connector, which is integrally integrated with the motor carrier plate substrate. This arrangement eliminates the need for a separate plastic coating process to install the interface connector and reduces the use of adhesive material; the cable can be directly connected during use, thereby reducing manufacturing costs.

[0009] According to one embodiment, the interface connector has a window filled with potting material. The cable connects to the interface connector at the window. This arrangement prevents leakage between the cable and the motor carrier plate, thereby achieving the purpose of sealing the electronic board.

[0010] On the other hand, this utility model also proposes a cooling fan module, which includes the aforementioned motor support plate.

[0011] According to an embodiment, the cooling fan module includes a printed circuit board and a motor assembly, which are respectively mounted on opposite sides of the motor carrier plate.

[0012] According to this utility model, the motor carrier plate has only two components: a base plate integrating a connector and a heat-conducting plate equipped with a motor mounting shaft. It only requires one assembly operation to assemble, namely, embedding the heat-conducting plate into the base plate using potting material, thereby achieving the product sealing requirements. Attached Figure Description

[0013] Embodiments of the present invention will be explained in more detail in the accompanying drawings. The features and advantages of the present invention will become apparent from the detailed description of the embodiments with reference to the accompanying drawings. In the drawings:

[0014] Figure 1 This is a perspective view of the motor support plate according to an embodiment of the present utility model, taken from one side.

[0015] Figure 1Ayes Figure 1 A cross-sectional view of the circled portion;

[0016] Figure 2 According to an embodiment of the present utility model, the motor support plate is from Figure 1 A perspective view taken from the opposite side. Detailed Implementation

[0017] The motor support plate of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] Figure 1 and Figure 2 Perspective views of the motor support plate 1 from opposite sides according to an embodiment of the present invention are shown. As shown, the motor support plate 1 includes a base plate 10, a heat-conducting plate 20, a motor mounting shaft 30, and a connector 40. The base plate 10 is an injection-molded plastic plate, the heat-conducting plate 20 is made of metal and is plastically encapsulated within the base plate 10, the motor mounting shaft 30 is press-fitted into the heat-conducting plate 20, and the connector 40 is integrally integrated with the base plate 10. A cable 50 is connected to the connector 40.

[0019] In addition, there is a slit S between the heat-conducting plate 20 and the motor support plate substrate 10 (see Figure 1A The slit S surrounds the entire periphery of the heat-conducting plate 20 and is filled with potting material 60 to secure the heat-conducting plate 20. A window W is provided on the connector 40 (see...). Figure 2 The window W was filled with potting material 70 to seal the cable 50.

[0020] Figure 2 It is also shown that a lead frame 80 is provided on the side of the motor mounting shaft 30 of the motor carrier plate 1, which is plastically encased in the substrate 10. The lead frame 80 is connected to the connector 40.

[0021] The foregoing detailed the presently preferred embodiments of this utility model, intended to illustrate the principles of the utility model, and the wording and expressions used are illustrative rather than restrictive. Those skilled in the art will understand that various modifications and variations of the above embodiments are possible without departing from the scope of this utility model. Therefore, in some cases, features disclosed in this utility model may be used independently of other features. On the other hand, features disclosed in this utility model may be combined when necessary to provide various combinations.

Claims

1. A motor support plate, comprising an injection-molded substrate, characterized in that, The motor support plate also includes a heat-conducting plate coated with plastic on the substrate, and the motor mounting shaft is press-fitted into the heat-conducting plate.

2. The motor support plate according to claim 1, characterized in that, There is a slit between the heat-conducting plate and the motor carrier plate substrate, and the slit is filled with potting material.

3. The motor support plate according to claim 1 or 2, characterized in that, The motor carrier plate also includes an interface connector, which is integrated with the motor carrier plate substrate.

4. The motor support plate according to claim 3, characterized in that, The interface connector has a window that is filled with potting material.

5. The motor support plate according to claim 4, characterized in that, The cable connects to the interface connector at the window.

6. A cooling fan module, characterized in that... Includes the motor support plate according to any one of claims 1-5.

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