A waterproof brushless motor

Abstract

The utility model discloses a waterproof brushless motor, including an outer shell, an inner bracket, and a stator frame. The outer shell is sleeved on the inner bracket, the inner bracket is provided with a first inner cavity and a second inner cavity, the first inner cavity is provided with a bearing, the stator frame is provided in the second inner cavity, a plurality of flow guides are provided around the inner bracket, the first annular boss of the inner bracket is in staggered contact with the second annular boss of the fan wheel, the inner bracket is provided with a waterproof sealing ring at the contact point with the fan wheel, the inner side of the waterproof sealing ring is provided with two conical bosses, a movable notch is provided between the two conical bosses, the two sides of the waterproof sealing ring are respectively provided with a first end foot and a second end foot, the first end foot extends into the inner bottom surface of the first annular boss of the inner bracket, and the second end foot extends into the contact position between the fan wheel and the inner bracket. The utility model can be waterproofed once through the flow guide of the inner bracket, and then waterproofed twice through the waterproof sealing ring, which can not only play a waterproof role, but also avoid affecting the rotation of the fan wheel.

Description

Technical Field

[0001] The utility model relates to a motor, in particular to a waterproof brushless motor. Background Art

[0002] Brushless motors are common components of hair dryers, which drive the fan wheel to rotate, so that the hair dryer can blow strong wind. Although the existing brushless motors used in hair dryers have a certain waterproof function, the waterproof effect needs to be improved. When using, there is still a small amount of water droplets entering the rotor, which will cause rust inside the motor in the long run. To this end, we propose a waterproof brushless motor. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a waterproof brushless motor.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a waterproof brushless motor, comprising an outer shell, an inner bracket, and a stator frame, the outer shell is sleeved on the inner bracket, the inner bracket is provided with a first inner cavity and a second inner cavity, the first inner cavity is provided with a bearing, the stator frame is provided in the second inner cavity, a plurality of guide channels are arranged around the inner bracket, the impeller is arranged at the front end of the inner bracket, the first annular boss of the inner bracket is in staggered contact with the second annular boss of the impeller, the inner bracket is provided with a waterproof sealing ring at the contact point with the impeller, the inner side of the waterproof sealing ring is provided with two conical bosses, and a movable notch is provided between the two conical bosses, and the two sides of the waterproof sealing ring are respectively provided with a first end foot and a second end foot, the first end foot extends into the inner bottom surface of the first annular boss of the inner bracket, and the second end foot extends into the contact position between the impeller and the inner bracket.

[0005] To further explain, a central rotating shaft is passed through the bearing, a front end of the central rotating shaft is connected to the impeller, a rear end of the central rotating shaft is connected to the rotor, and the rotor is rotatably arranged in the stator frame.

[0006] It is further explained that the rotor is arranged at the bearing and the rear end bracket, and the rear end bracket is provided with an interface for connecting to a circuit board.

[0007] To further explain, the inner bracket is specifically provided with a plurality of heat dissipation holes, and the front and rear ends of the heat dissipation holes are respectively connected to the first inner cavity and the second inner cavity.

[0008] To further explain, the waterproof sealing ring is made of silicone or rubber.

[0009] The beneficial effect of the utility model is that the utility model can achieve primary waterproofing through the guide channel of the inner bracket and secondary waterproofing through the waterproof sealing ring. A movable notch is provided between the two conical bosses of the waterproof sealing ring, so that the waterproof sealing ring can not only play a waterproof role, but also avoid affecting the rotation of the fan wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural sectional view of the utility model.

[0011] Figure 2 It is a structural schematic diagram of the utility model.

[0012] Figure 3 Schematic diagram of the structure of the inner bracket.

[0013] Figure numbers: 10, outer shell; 20, inner bracket; 201, first inner cavity; 202, second inner cavity; 203, flow guide channel; 204, first annular boss; 205, inner bottom surface; 206, heat dissipation hole; 30, stator frame; 40, bearing; 41, rotating shaft; 50, impeller; 51, second annular boss; 60, waterproof sealing ring; 61, conical boss; 62, movable notch; 63, first end foot; 64, second end foot; 70, rotor; 80, rear end bracket; 81, interface. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0015] Combined with Figure 1 and attached Figure 2 As shown, a waterproof brushless motor includes an outer shell 10, an inner bracket 20, and a stator frame 30. The outer shell 10 is sleeved on the inner bracket 20. The inner bracket 20 is provided with a first inner cavity 201 and a second inner cavity 202. The first inner cavity 201 is provided with a bearing 40. Specifically, there are two bearings 40 and they are spaced apart from each other. The stator frame 30 is provided in the second inner cavity 202. A rotating shaft 41 is passed through the bearing 40. The front end of the rotating shaft 41 is connected to the impeller 50. The rear end of the rotating shaft 41 is connected to the rotor 70. The rotor 70 is rotatably arranged in the stator frame 30. During operation, the rotor 70 rotates relative to the stator frame 30. When the rotor 70 rotates, it drives the rotating shaft 41 and the impeller 50 to rotate synchronously. Specifically, a plurality of heat dissipation holes 206 are provided at the inner bracket 20. The front and rear ends of the heat dissipation holes 206 are connected to the first inner cavity 201 and the second inner cavity 202 respectively.

[0016] Combined with Figure 1 and attached Figure 3As shown, a plurality of flow guides 203 are arranged around the inner bracket 20, the impeller 50 is arranged at the front end of the inner bracket 20, the first annular boss 204 of the inner bracket 20 is in staggered contact with the second annular boss 51 of the impeller 50, and the inner bracket 20 is provided with a waterproof sealing ring 60 at the contact point with the impeller 50. The material of the waterproof sealing ring 60 is silicone or rubber. When water enters, the flow guide 203 of the inner bracket 20 can guide out a part of the water. For a small amount of water entering the contact point between the impeller 50 and the inner bracket 20, the waterproof sealing ring 60 produces a waterproof effect.

[0017] As attached Figure 1 As shown, the inner side of the waterproof sealing ring 60 is provided with two conical bosses 61, and a movable notch 62 is provided between the two conical bosses 61. The two sides of the waterproof sealing ring 60 are respectively provided with a first end foot 63 and a second end foot 64. The first end foot 63 extends into the inner bottom surface 205 of the first annular boss 204 of the inner bracket 20, and the second end foot 64 extends into the contact position between the fan wheel 50 and the inner bracket 20. Since the fan wheel 50 rotates under the drive of the rotating shaft 41, there must be a certain gap between the fan wheel 50 and the inner bracket 20, and the gap is a place where water easily enters. A movable notch 62 is provided between the two conical bosses 61 of the waterproof sealing ring 60. When the fan wheel 50 rotates, the conical boss 61 close to the fan wheel 50 will be squeezed, so that the movable notch 62 is slightly retracted. The waterproof sealing ring 60 can not only play a waterproof role, but also prevent the rotation friction of the fan wheel 50 from increasing, thereby avoiding affecting the rotation of the fan wheel 50.

[0018] As attached Figure 1 As shown, the rotor 70 is disposed at the bearing 40 and the rear bracket 80, and the rear bracket 80 is provided with an interface 81 for connecting the circuit board. The rear bracket 80 is specifically still located in the second inner cavity 202 of the inner bracket 20, and can be shielded and protected by the inner bracket 20 to avoid water ingress.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0021] The above description does not limit the technical scope of the present invention. Any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A waterproof brushless motor, characterized in that: The invention comprises an outer shell (10), an inner bracket (20), and a stator frame (30), wherein the outer shell (10) is sleeved on the inner bracket (20), the inner bracket (20) is provided with a first inner cavity (201) and a second inner cavity (202), the first inner cavity (201) is provided with a bearing (40), the stator frame (30) is arranged in the second inner cavity (202), a plurality of flow guides (203) are arranged around the inner bracket (20), a fan wheel (50) is arranged at the front end of the inner bracket (20), a first annular boss (204) of the inner bracket (20) and a second annular boss (50) of the fan wheel (50) are connected to each other. 1) Staggered contact, wherein the inner bracket (20) is provided with a waterproof sealing ring (60) at the contact position with the impeller (50), the inner side of the waterproof sealing ring (60) is provided with two conical bosses (61), a movable notch (62) is formed between the two conical bosses (61), and the two sides of the waterproof sealing ring (60) are respectively provided with a first end foot (63) and a second end foot (64), the first end foot (63) extends into the inner bottom surface (205) of the first annular boss (204) of the inner bracket (20), and the second end foot (64) extends into the contact position between the impeller (50) and the inner bracket (20).

2. A waterproof brushless motor according to claim 1, characterized in that: A central rotating shaft (41) is passed through the bearing (40), the front end of the central rotating shaft (41) is connected to the impeller (50), and the rear end of the central rotating shaft (41) is connected to the rotor (70), and the rotor (70) is rotatably arranged in the stator frame (30).

3. A waterproof brushless motor according to claim 2, characterized in that: The rotor (70) is disposed at the bearing (40) and the rear end bracket (80), and the rear end bracket (80) is provided with an interface (81) for connecting to a circuit board.

4. The waterproof brushless motor according to claim 1, characterized in that: The inner bracket (20) is specifically provided with a plurality of heat dissipation holes (206), and the front and rear ends of the heat dissipation holes (206) are respectively connected to the first inner cavity (201) and the second inner cavity (202).

5. The waterproof brushless motor according to claim 1, characterized in that: The waterproof sealing ring (60) is made of silicone or rubber.

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