A brushless motor and a housing assembly thereof

Abstract

The utility model discloses a kind of brushless motor and its shell assembly, the shell assembly includes the front shell body prepared by metal material and the rear shell body prepared by plastic material, the front shell body and the rear shell body are connected between each other to form the accommodation space for accommodating motor body;Wherein, a plurality of hollow holes are formed on the front shell body, a plurality of the hollow hole is arranged in the circumferential array on the front shell body, the hollow hole extends from the top surface of the front shell body to the side surface of the front shell body, and support beam is formed between any two adjacent hollow holes. The scheme of the present application, the rear shell body of shell assembly is prepared by plastic material, which can reduce the noise of motor, the front shell body is provided with a plurality of hollow holes arranged in the circumferential array, which can improve the heat dissipation performance of motor.

Description

Technical Field

[0001] This utility model relates to the field of electric motor technology, and in particular to a brushless motor and its housing assembly. Background Technology

[0002] The housing of existing brushless motors is typically formed by a front housing and a rear housing, both made of metal (commonly aluminum alloy). The front and rear housings are interconnected, forming a closed cavity in which the motor body is installed. In production practice, it has been found that this type of motor housing results in both relatively high noise levels and poor heat dissipation. Utility Model Content

[0003] In view of this, the present invention provides a brushless motor and its housing assembly to solve the problems of how to reduce motor noise transmission and improve heat dissipation performance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This utility model first provides a housing assembly for a brushless motor, the housing assembly including a front housing made of metal and a rear housing made of plastic, the front housing and the rear housing being connected to each other to form an accommodating space for accommodating the motor body. The front housing has multiple perforated holes arranged in a circular array. The perforated holes extend from the top surface of the front housing to the side surface of the front housing, and a support beam is formed between any two adjacent perforated holes.

[0005] In the specific design, the front housing has 6 to 10 perforated holes.

[0006] In the specific design, the total area of ​​the plurality of hollow holes is more than 50% of the total area of ​​the top and side surfaces of the front housing.

[0007] In the specific design, the edge of the front housing is provided with a plurality of first connecting screw holes, which are respectively formed at the end of a portion of the support beam away from the center point of the front housing. The edge of the rear housing is provided with second connecting screw holes that correspond one-to-one with the first connecting screw holes.

[0008] In the specific design, there are three first connecting screw holes, which are arranged in a circular array on the edge of the front housing.

[0009] In the specific design, the support beam with the first connecting screw hole is connected to the adjacent left and / or right support beams by reinforcing ribs.

[0010] In the specific design, a first mounting groove is provided at the center of the surface of the front housing facing the rear housing, and a first through hole is provided in the first mounting groove; a second mounting groove is provided at the center of the surface of the rear housing facing the front housing, and a second through hole is provided in the second mounting groove; the first mounting groove and the second mounting groove are respectively used to install the bearings of the motor body.

[0011] This utility model also provides a brushless motor, which includes a motor body and a housing assembly as described above, wherein the motor body is installed in the accommodating space.

[0012] This utility model provides a brushless motor and its housing assembly. The housing assembly includes a front housing made of metal and a rear housing made of plastic. The front and rear housings are connected to each other to form an accommodating space for accommodating the motor body. The front housing has multiple perforations arranged in a circular array, extending from the top surface to the side surface of the front housing. A support beam is formed between any two adjacent perforations. On one hand, changing the rear housing from traditional metal to plastic reduces noise transmission and isolates the noise from the motor's rotation, significantly reducing the amount of noise transmitted to the external environment. On the other hand, maintaining the traditional metal material and providing multiple perforations in a circular array for the front housing improves the motor's heat dissipation performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the brushless motor in this utility model; Figure 2 This is a cross-sectional view of the brushless motor in this utility model; Figure 3 and Figure 4 These are schematic diagrams of the front housing from different perspectives in this utility model; Figure 5 This is a schematic diagram of the rear shell structure in this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of this utility model shown in and described with reference to the drawings are merely exemplary, and this utility model is not limited to these embodiments.

[0015] It should be noted that the same or similar reference numerals in the accompanying drawings of the embodiments of this utility model correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0016] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0017] This utility model provides a brushless motor and its housing assembly. (See also...) Figures 1 to 5 The brushless motor includes a motor body 200 and a housing assembly 100, wherein the motor body 200 is installed inside the housing assembly 100.

[0018] The outer casing assembly 100 includes a front casing 1 made of metal and a rear casing 2 made of plastic. The front casing 1 and the rear casing 2 are connected to each other to form an accommodating space 3 for accommodating the motor body 200. The motor body 200 is installed in the accommodating space 3.

[0019] The front housing 1 has a plurality of perforated holes 11 arranged in a circular array on the front housing 1. The perforated holes 11 extend from the top surface of the front housing 1 to the side surface of the front housing 1, and a support beam 12 is formed between any two adjacent perforated holes 11.

[0020] As described above, the brushless motor and its housing assembly have the following characteristics: First, changing the rear housing 2 from traditional metal to plastic reduces noise transmission and isolates the noise generated during motor rotation, significantly reducing the amount of noise transmitted to the external environment. Second, while the front housing 1 retains the traditional metal material and features multiple perforated holes 11 arranged in a circular array, this improves the motor's heat dissipation performance.

[0021] The rear housing 2 is preferably made of PET material, which provides good noise insulation while also meeting the required strength to support the motor. The front housing 1 is preferably made of aluminum alloy.

[0022] In a preferred embodiment, the front housing 1 has 6 to 10 perforated holes 11. In this embodiment, as shown in the figure, the front housing 1 has 8 perforated holes 11. In a further preferred embodiment, the total area of ​​the plurality of perforated holes 11 is more than 50% of the total area of ​​the top surface and the side surface of the front housing 1. While maintaining sufficient supporting strength, the area of ​​the ventilation channel is increased to improve heat dissipation performance.

[0023] In the specific design, the edge of the front housing 1 is provided with a plurality of first connecting screw holes 13, which are respectively formed at the ends of the support beams 12 away from the center point of the front housing 1. The edge of the rear housing 2 is provided with second connecting screw holes 21 corresponding to the first connecting screw holes 13. The front housing 1 and the rear housing 2 are connected to each other by threaded parts connected to the first connecting screw holes 13 and the second connecting screw holes 21, and the motor body 200 is clamped and fixed in the accommodating space 3.

[0024] In this embodiment, as a specific example, there are three first connecting screw holes 13. The three first connecting screw holes 13 are arranged in a circular array on the edge of the front housing 1. Correspondingly, the edge of the rear housing 2 is also provided with three second connecting screw holes 21.

[0025] As a preferred embodiment, in this case, such as Figure 3 As shown, on the front housing 1, a reinforcing rib 14 is connected between the support beam 12 with the first connecting screw hole 13 and the adjacent left and / or right support beam 12. Since the front housing 1 is designed with a large open area, the reinforcing rib 14 is provided at the threaded connection point with the rear housing 2 (first connecting screw hole 13) to enhance the support strength of the front housing 1.

[0026] Furthermore, a first mounting groove 15 is provided at the center of the surface of the front housing 1 facing the rear housing 2, and a first through hole 16 is provided in the first mounting groove 15. A second mounting groove 22 is provided at the center of the surface of the rear housing 2 facing the front housing 1, and a second through hole 23 is provided in the second mounting groove 22. The first mounting groove 15 and the second mounting groove 22 are respectively used to install the bearings of the motor body 200. Specifically, a first bearing 4 is provided in the first mounting groove 15, and a second bearing 5 is provided in the second mounting groove 22.

[0027] The motor body 200 includes a stator 201, a rotor 202, and a motor shaft 203. The stator 201 is fixedly connected to the inner wall of the accommodating space 3, and the rotor 202 passes through the stator 201 and rotatably engages with the stator 201. The motor shaft 203 passes through the rotor 202, with its first end passing through the first bearing 4 and extending to the outside of the front housing 1 through the first through hole 16, and its second end passing through the second bearing 5 and being received in the second through hole 23.

[0028] In summary, the brushless motor and its housing assembly provided in the above embodiments of this utility model, by improving the structure of the housing assembly, can not only reduce the noise of the motor, but also improve the heat dissipation performance of the motor.

[0029] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A housing assembly for a brushless motor, characterized in that, The housing assembly (100) includes a front housing (1) made of metal and a rear housing (2) made of plastic. The front housing (1) and the rear housing (2) are connected to each other to form an accommodating space (3) for accommodating the motor body (200). The front housing (1) has a plurality of hollow holes (11) arranged in a circular array on the front housing (1). The hollow holes (11) extend from the top surface of the front housing (1) to the side surface of the front housing (1). A support beam (12) is formed between any two adjacent hollow holes (11).

2. The housing assembly according to claim 1, characterized in that, The front housing (1) has 6 to 10 hollow holes (11).

3. The housing assembly according to claim 2, characterized in that, The total area of ​​the plurality of the hollow holes (11) is more than 50% of the total area of ​​the top and side surfaces of the front housing (1).

4. The housing assembly according to claim 1, characterized in that, The edge of the front housing (1) is provided with a plurality of first connecting screw holes (13), and the plurality of first connecting screw holes (13) are respectively formed at one end of the support beam (12) away from the center point of the front housing (1). The edge of the rear housing (2) is provided with second connecting screw holes (21) corresponding one-to-one with the first connecting screw holes (13).

5. The housing assembly according to claim 4, characterized in that, The number of the first connecting screw holes (13) is 3, and the 3 first connecting screw holes (13) are arranged in a circumferential array on the edge of the front housing (1).

6. The housing assembly according to claim 4, characterized in that, The support beam (12) with the first connecting screw hole (13) is connected to the adjacent left and / or right support beam (12) by a reinforcing rib (14).

7. The housing assembly according to any one of claims 1-6, characterized in that, The front housing (1) has a first mounting groove (15) at the center of its surface facing the rear housing (2), and a first through hole (16) is provided in the first mounting groove (15); the rear housing (2) has a second mounting groove (22) at the center of its surface facing the front housing (1), and a second through hole (23) is provided in the second mounting groove (22); the first mounting groove (15) and the second mounting groove (22) are respectively used to install the bearings of the motor body (200).

8. A brushless motor, characterized in that, It includes a motor body (200) and a housing assembly (100) as described in any one of claims 1-7, wherein the motor body (200) is mounted in the accommodating space (3).

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