CN219086953U - Radiating assembly, motor shell, motor and electronic water pump - Google Patents

Abstract

The utility model discloses a heat radiation assembly, a motor shell, a motor and an electronic water pump. Compared with the existing metal heat dissipation assembly, the heat dissipation assembly has the advantages that through the material selection and structural design of the heat dissipation assembly, the manufacturing cost of the heat dissipation assembly is reduced, the scale precision of the heat dissipation assembly is guaranteed, and the assembly precision of the heat dissipation assembly can be remarkably improved; when the heat radiation component is applied to the motor shell of the electronic water pump, the connection mode between the heat radiation component and the bottom plate of the motor shell is a plastic-in-plastic structure, so that the risk that the probability of defective products is increased due to the difference of thermal expansion coefficients between the traditional metal heat radiation component and the bottom plate of the motor shell of the plastic electronic water pump is avoided, the subsequent product recovery and scrapping are facilitated, and the heat radiation component is more environment-friendly.

Description

Radiating assembly, motor shell, motor and electronic water pump

Technical Field

The utility model relates to the technical field of heat dissipation, in particular to a heat dissipation assembly. The application also relates to a motor housing, a motor and an electronic water pump using such a heat dissipating assembly.

Background

With the rapid development of new energy electric vehicles, the requirements on the structure and the performance of the components of the cooling system of the vehicle are also improved. The electronic water pump of the automobile is an important component part in the cooling system of the new energy electric automobile, wherein the core part is a water pump controller, however, the power of a power element on a circuit board of the controller is larger and larger, the volume is smaller and smaller, and the requirement on heat dissipation efficiency is higher and higher. Because the power component on the controller circuit board can generate heat in the working process when the water pump operates, a large amount of heat is generated, if the generated heat cannot be timely emitted, the overload damage of an internal circuit can be caused, the service life of the water pump controller and the automobile electronic water pump is influenced, and therefore the power component needs to be attached to a heat radiating device to conduct the heat.

In order to promote the heat generated by the power element of the circuit board of the water pump controller to be taken away in time, a metal (such as aluminum) heat dissipation plate is arranged on a bottom plate of a cavity of the water pump controller in the prior art. When the water pump works, the metal heat radiation plate conducts heat generated by the power element on the controller circuit board to the pump body in a heat conduction mode to radiate so as to prevent the water pump controller circuit board and the temperature in the containing cavity of the controller circuit board from being too high and ensure that the water pump can continuously and normally run. In order to reduce the manufacturing cost and weight, manufacturers generally choose plastic (generally PPS) as the motor housing of the water pump, a plastic bottom plate is disposed in the motor housing to divide the motor housing into two parts to form two accommodating cavities, one for mounting the driving motor and one for mounting the controller circuit board, and the metal heat dissipation plate is connected with the plastic bottom plate into a whole by adopting an insert injection molding process. However, metal insert injection molding suffers from a major drawback: the die is often easy to crush in the injection molding process, so that the injection molding efficiency is affected, and the maintenance cost of the die is greatly increased; meanwhile, the requirement on the dimensional accuracy of the metal radiating plate is particularly high, the manufacturing difficulty of a die casting mold is increased, complicated post-treatment procedures such as burr treatment, polishing, paint spraying and the like are required after the metal radiating plate is molded, and the manufacturing cost of the radiating plate is further increased; furthermore, due to the large difference of thermal expansion coefficients of metal and plastic, the probability of defective products is larger, and the plastic molded product with the metal insert is unfavorable for subsequent recovery and scrapping of the product.

Disclosure of Invention

The present utility model is directed to a heat dissipating component made of a heat conductive plastic material, so as to overcome the technical drawbacks of the metal heat dissipating plate indicated in the background art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a cooling module, includes the cooling module body of heat conduction plastics material, the cooling module body includes the heating panel and encircles the shirt rim that the heating panel lateral wall set up, a plurality of breach has been seted up to the outward flange of shirt rim, heating panel and shirt rim are through injection moulding technology integrated into one piece.

Optionally, a step through hole is formed in the center of the heat dissipation plate.

Optionally, the hole end of the stepped through hole is higher than the panel of the heat dissipation plate to form a small column platform.

Optionally, a plurality of through holes are formed in the heat dissipation plate.

Optionally, the breach that the outward flange of shirt rim offered is T type, V type, U type or arc structure.

In order to ensure good heat dissipation effect of the heat dissipation component, the heat dissipation component is made of heat conduction plastic

The coefficient is more than or equal to 6W/m.K, such as a high heat conduction nylon composite material. The heat productivity of the power element on the circuit board of the visual controller for the heat dissipation component can be used for pertinently selecting materials for the heat dissipation performance requirement of the heat dissipation component.

Another object of the present utility model is to provide a motor housing including the above heat dissipation assembly.

Further, the motor shell comprises a bottom plate and a cylinder body, and the heat radiating component is connected with the bottom plate into a whole through a double-color injection molding or insert injection molding process.

Further, the bottom plate divides the cylinder into two parts into two cavities.

It is still another object of the present utility model to provide a motor including the motor housing, wherein the motor further includes a controller circuit board disposed in a cavity, and a power element on one side of the controller circuit board is in contact with the heat dissipation assembly directly or through a heat conducting pad.

It is still another object of the present utility model to provide an electronic water pump including a water pump portion and a motor portion for driving the water pump portion, the motor portion including the above-described motor.

Compared with the existing metal heat dissipation assembly, the utility model has the beneficial effects that:

(1) The heat radiation component is prepared from the heat conduction plastic through an injection molding process, so that the production and processing process is simple, the dimensional accuracy of the product is guaranteed, and the subsequent assembly accuracy can be obviously improved; and the heat conductivity coefficient of the heat conducting plastic and the shape structure of the heat radiating component can be used for carrying out targeted material selection and design according to the heat productivity of the power element on the controller circuit board and the bottom plate structure of the motor shell, which are contacted with the heat conducting plastic, so that the most effective heat radiating effect can be obtained at low cost.

(2) The heat radiation component and the motor shell bottom plate are connected by adopting a plastic-in-plastic structure, so that the risk that the probability of defective products is increased due to the difference of thermal expansion coefficients between the traditional metal heat radiation component and the plastic motor shell bottom plate is avoided, the subsequent product recovery and scrapping are facilitated, and the motor shell bottom plate is more environment-friendly.

Drawings

Fig. 1 is a schematic view of a heat dissipating assembly according to an embodiment of the utility model.

Fig. 2 is a schematic view of another view of a heat dissipating assembly according to an embodiment of the utility model.

Fig. 3 is a schematic view of a motor housing equipped with a heat dissipating assembly of the present utility model.

In the figure: the heat-dissipating component comprises a 1-heat-dissipating component body, a 2-heat-dissipating plate, a 3-skirt, a 4-notch, a 5-assembly stepped through hole, a 6-small column platform, a 7-through hole, an 8-bottom plate, a 9-cylinder body and a 10-motor shell.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model takes a heat radiation component applied to a motor shell of an automobile electronic water pump as an example. As shown in fig. 1 and 2, the heat dissipation assembly of the utility model comprises a heat dissipation assembly body 1 made of heat conduction plastic (heat conduction nylon with a heat conduction coefficient of 7.9W/m·k), wherein the heat dissipation assembly body 1 comprises a heat dissipation plate 2 and a skirt 3 arranged around the side wall of the heat dissipation plate, and the heat dissipation plate and the skirt are integrally formed through an injection molding process; the outer edge of the skirt edge 3 is provided with a plurality of U-shaped notches 4 so as to further enhance the binding force between the heat radiation component and the bottom plate of the water pump motor shell in the subsequent secondary forming process; a stepped through hole 5 is formed in the center of the heat radiation plate 2 and is used for externally connecting a cooling liquid isolation sheath component of a water pump, and a small column platform 6 is formed at the hole end of the stepped through hole 5, which is higher than a panel of the heat radiation plate 2 and is used for assembling and fixing a circuit board of a water pump controller; two through holes 7 for subsequent secondary forming and positioning are formed in the heat dissipation plate 2.

As shown in fig. 3, the water pump motor housing 10 of the present utility model includes a bottom plate 8 and a cylinder 9, where the circuit board of the water pump controller is fixedly installed, and the heat dissipation assembly 1 and the bottom plate 8 are connected into a whole by two-color injection molding or insert injection molding.

When adopting double-colored injection molding or inserts injection molding technology to link radiating assembly as an organic whole with motor casing, the through-hole 7 that sets up on the heating panel in the radiating assembly can be well with radiating assembly location motor casing injection molding mould on, guarantees to effectively connect between the bottom plate in radiating assembly and the water pump motor casing, and then ensures the injection molding processingquality of water pump motor casing.

The foregoing is a preferred embodiment of the present utility model, and various changes and modifications may be made therein by those skilled in the art without departing from the general inventive concept, and such changes and modifications should be considered as falling within the scope of the claimed utility model.

Claims (11)

1. The utility model provides a cooling module, its characterized in that includes the cooling module body of heat conduction plastics material, the cooling module body includes the heating panel and encircles the shirt rim that the heating panel lateral wall set up, a plurality of breach have been seted up to the outward flange of shirt rim, heating panel and shirt rim are through injection moulding technology integrated into one piece.

2. The heat dissipating assembly of claim 1, wherein a stepped through hole is formed in a center of the heat dissipating plate.

3. The heat dissipating assembly of claim 2, wherein the stepped through hole has a hole end that is raised above the heat dissipating plate panel to form a small plateau.

4. The heat dissipating assembly of claim 1, wherein said heat dissipating plate has a plurality of holes for positioning.

5. The heat dissipating assembly of claim 1, wherein the notch formed in the outer edge of the skirt is in a T-shaped, V-shaped, U-shaped or arcuate configuration.

6. The heat dissipating assembly of claim 1, wherein said thermally conductive plastic has a thermal conductivity of 6W/m-K or more.

7. A motor housing comprising the heat dissipating assembly of any one of claims 1-6.

8. The motor housing of claim 7, wherein the motor housing comprises a base plate and a barrel, and the heat sink assembly is integrally connected to the base plate by a two-shot or insert injection molding process.

9. The motor housing of claim 8, wherein the base plate bisects the barrel into two cavities.

10. An electric motor comprising the motor housing of claim 9, further comprising a controller circuit board disposed within a cavity, the power element on one side of the controller circuit board being in contact with the heat dissipating assembly directly or through a thermal pad.

11. An electronic water pump comprising a water pump section and a motor section for driving the water pump section, the motor section comprising the motor of claim 10.

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