Direct-current brushless fan motor

Abstract

The utility model discloses a direct-current brushless fan motor which comprises a protection box, a protection cover is movably installed on the front side of the protection box, heat dissipation holes are formed in the top and the bottom of the protection box in a penetrating mode, dustproof nets are fixedly arranged in the heat dissipation holes, a motor body is installed in the protection box, and an output shaft of the motor body is sleeved with a protection sleeve. A wear-resistant sleeve is arranged in the protective sleeve, a waterproof sleeve is arranged in the wear-resistant sleeve, and a protective plate is arranged at the front end of the protective sleeve. The dustproof net is used in cooperation with the heat dissipation holes instead of being directly installed on the motor body, the motor body is not provided with fastening screws, the motor body cannot be damaged, and long-term use of the motor body is facilitated. The protective sleeve, the wear-resistant sleeve and the waterproof sleeve can protect the output shaft of the motor body, so that the output shaft of the motor body is not in direct contact with the fan blade assembly, a connecting structure of the output shaft of the motor body and the fan blades is not abraded when the fan blades are rotated for a long time, and normal use of the motor is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan motors, and in particular relates to a brushless DC fan motor. Background Art

[0002] A brushless DC fan motor is a motor device used for fans, which is used to drive the fan blades to rotate to achieve the purpose of blowing air. It has the characteristics of small size, light weight and high output. A motor refers to an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction, or converts one form of electrical energy into another form of electrical energy. An electric motor converts electrical energy into mechanical energy, and a generator converts mechanical energy into electrical energy.

[0003] For example, a Chinese patent with publication number CN209488335U discloses a DC brushless fan motor, including a brushless fan motor body, a connecting block and a vertical rod, a mounting belt is provided on the outer side of the brushless fan motor body, and a fastening bolt is installed on the mounting belt, and the mounting belt is connected to the brushless fan motor through the fastening bolt, a mounting hole is reserved on the mounting belt, the connecting block is located below the heat sink, and the heat sink is connected to the mounting belt through the connecting block and the mounting hole, a return spring is provided above the push rod, and the push rod is connected to the heat sink through the return spring, and a heat sink is installed below the push rod.

[0004] The above patent has the following problems:

[0005] Compared with the heat sink of the heat dissipation device in the prior art, the heat sink is directly installed on the motor, and the fastening screw is directly installed on the motor. The bottom of the fastening screw may penetrate into the motor, damaging the motor, which is not conducive to the long-term use of the motor. In addition, in the prior art, the motor directly penetrates the connecting plate when the fan is installed, and the output end of the motor is not protected, resulting in direct connection with the fan blade assembly. Long-term rotation of the fan blade will cause the connection structure between the output end of the motor and the fan blade to be worn, affecting the normal use of the DC motor. In view of this, we propose a DC brushless fan motor. Utility Model Content

[0006] The purpose of the utility model is to provide a brushless DC fan motor to solve the above-mentioned technical problems, so as to achieve the effect of protecting the output end of the motor without damaging the surface of the motor.

[0007] In view of this, the utility model provides a brushless DC fan motor, comprising a protection box, a protection cover is movably installed on the front side of the protection box, heat dissipation holes are penetrated through the top and bottom of the protection box, a dustproof net is fixedly installed inside the heat dissipation hole, a motor body is installed inside the protection box, an output shaft sleeve of the motor body is connected with a protection sleeve, a wear-resistant sleeve is arranged inside the protection sleeve, a waterproof sleeve is arranged inside the wear-resistant sleeve, and a protective plate is arranged at the front end of the protection sleeve;

[0008] An extension plate is fitted on the front side of the protective cover, and the extension plate has an extension hole for the output shaft of the motor body and the protective cover to pass through. The protective cover is provided with a notch for the output shaft of the motor body and the protective cover to pass through.

[0009] Wherein, the top and bottom of the extension plate are both provided with a first connecting plate, the top and bottom of the protection cover are both provided with a second connecting plate corresponding to the first connecting plate, and the first connecting plate and the second connecting plate are connected by a connecting bolt.

[0010] A limiting groove which is mounted in cooperation with the motor body is provided inside the protection box, and a protective pad which contacts with the motor body is arranged in the limiting groove.

[0011] Among them, the lower ends of the left and right sides of the protection box are both provided with positioning plates, and the interiors of the positioning plates are penetrated and installed with positioning bolts;

[0012] The upper and lower ends of the protection cover are provided with threaded holes and are threadedly connected with fixing bolts, and the front side of the protection box is provided with a threaded hole countersunk which matches with the fixing bolt.

[0013] Among them, the thickness of the protective cover, the wear-resistant cover and the waterproof cover is 0.1-0.2mm.

[0014] The utility model utilizes a protection box to protect the motor body, utilizes the heat dissipation holes to dissipate the heat generated by the generator body, utilizes a dustproof net to prevent dust from entering the protection box, the dustproof net is used in conjunction with the heat dissipation holes, rather than being directly installed on the motor body, the motor body has no fastening screws, will not damage the motor body, and is conducive to the long-term use of the motor body.

[0015] The utility model utilizes the motor body to drive the fan to rotate, the protective cover can protect the output shaft of the motor body, the wear-resistant cover can increase the wear resistance of the output shaft of the motor body, and the waterproof cover can improve the waterproofness of the output shaft of the motor body. When the motor body is connected to the installation structure of the fan, the protective cover, the wear-resistant cover and the waterproof cover can protect the output shaft of the motor body, so that the output shaft of the motor body will not directly contact the fan blade assembly, and the long-term rotation of the fan blades will not cause the connection structure between the output shaft of the motor body and the fan blades to wear, and will not affect the normal use of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall three-dimensional diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model;

[0018] Figure 3 It is a partial three-dimensional diagram of the protective cover in the utility model;

[0019] Figure 4 It is a side view of the partial structure of the protection box in the utility model.

[0020] In the figure: 1. protection box; 101. protection cover; 102. threaded hole; 103. fixing bolt; 104. heat dissipation hole; 105. dust net; 2. motor body; 201. protection cover; 202. wear-resistant cover; 203. waterproof cover; 204. protection plate; 3. extension plate; 301. extension hole; 4. limiting groove; 401. protection pad; 5. first connecting plate; 501. second connecting plate; 502. connecting bolt; 6. positioning plate; 601. positioning bolt. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0022] A brushless DC fan motor comprises a protection box 1, a protection cover 101 is movably installed on the front side of the protection box 1, a heat dissipation hole 104 is penetrated through the top and bottom of the protection box 1, a dustproof net 105 is fixedly installed inside the heat dissipation hole 104, a motor body 2 is installed inside the protection box 1, the motor body 2 is electrically connected to an external controller through a wire, a protection sleeve 201 is sleeved on the output shaft of the motor body 2, a wear-resistant sleeve 202 is arranged inside the protection sleeve 201, a waterproof sleeve 203 is arranged inside the wear-resistant sleeve 202, and a protective plate 204 is arranged at the front end of the protection sleeve 201;

[0023] An extension plate 3 is fitted on the front side of the protective cover 101. The extension plate 3 has an extension hole 301 for the output shaft of the motor body 2 and the protective cover 201 to pass through. The protective cover 101 is provided with a groove for the output shaft of the motor body 2 and the protective cover 201 to pass through. The extension plate 3 can make the output shaft of the motor body 2 obtain more support width and greater bearing capacity, and can withstand the pressure when the fan rotates, preventing the pressure from crushing the output shaft of the motor body 2.

[0024] Among them, the top and bottom of the extension plate 3 are both provided with a first connecting plate 5, and the top and bottom of the protective cover 101 are both provided with a second connecting plate 501 corresponding to the first connecting plate 5. The first connecting plate 5 and the second connecting plate 501 are connected by a connecting bolt 502, and the installation of the extension plate 3 is realized by the first connecting plate 5 and the second connecting plate 501.

[0025] Among them, a limiting groove 4 is opened inside the protection box 1 to cooperate with the motor body 2, and a protective pad 401 in contact with the motor body 2 is arranged in the limiting groove 4. The motor body 2 is limited and installed by using the limiting groove 4. The protective pad 401 can effectively avoid rigid contact between the motor body 2 and the limiting groove 4, thereby avoiding wear between the motor body 2 and the limiting groove 4.

[0026] The lower ends of the left and right sides of the protection box 1 are both provided with positioning plates 6, and positioning bolts 601 are installed through the interior of the positioning plates 6. The positioning plates 6 are used to install and fix the protection box 1;

[0027] The upper and lower ends of the protective cover 101 are provided with threaded holes 102 and are threadedly connected with fixing bolts 103 . The front side of the protective box 1 is provided with a threaded hole countersunk that cooperates with the fixing bolts 103 . The protective cover 101 is installed to the front side of the protective box 1 through the fixing bolts 103 .

[0028] The thickness of the protective cover 201, the wear-resistant cover 202 and the waterproof cover 203 is 0.1-0.2 mm.

[0029] When in use, the protection box 1 is installed in a suitable position using the positioning plate 6, fixed by the positioning bolt 601, and the motor body 2 is limitedly installed using the limiting groove 4 to prevent the motor body 2 from shaking during operation. The protective pad 401 protects the motor body 2 and the limiting groove 4 from wearing each other. The protection box 1 protects the motor body 2 as a whole, and the motor body 2 is protected by the protection box 1. The protection cover 101 is fixed to one side of the protection box 1 using the fixing bolt 103. The heat dissipation holes 104 are used to dissipate the heat generated by the generator body 2. The dustproof net 105 is used to prevent dust from entering the protection box 1. The dustproof net 105 is used in conjunction with the heat dissipation holes 104 instead of being directly installed on the motor body 2. The motor body 2 has no fastening screws, which will not damage the motor body 2, which is beneficial to the long-term use of the motor body 2; the motor body 2 drives the fan to rotate, and the protective cover 2 01 can protect the output shaft of the motor body 2, the wear-resistant sleeve 202 can increase the wear resistance of the output shaft of the motor body 2, the waterproof sleeve 203 can improve the waterproofness of the output shaft of the motor body 2, and the fan can be installed on the protective plate 204. When the motor body 2 is connected to the mounting structure of the fan, the protective sleeve 201, the wear-resistant sleeve 202 and the waterproof sleeve 203 can protect the output shaft of the motor body 2, and the thickness of the protective sleeve 201, the wear-resistant sleeve 202 and the waterproof sleeve 203 are all 0.1-0.2mm. The use of a thinner thickness will not affect the rotation of the output shaft of the motor body 2. When used together, the output shaft of the motor body 2 can be protected, so that the output shaft of the motor body 2 will not be in direct contact with the fan blade assembly. Long-term rotation of the fan blades will not cause the connection structure between the output shaft of the motor body 2 and the fan blades to be worn, and will not affect the normal use of the motor body 2.

Claims

1. A brushless DC fan motor, comprising a protective box (1), characterized in that: A protective cover (101) is movably mounted on the front side of the protective box (1); a heat dissipation hole (104) is formed through the top and bottom of the protective box (1); a dustproof net (105) is fixedly mounted inside the heat dissipation hole (104); a motor body (2) is mounted inside the protective box (1); an output shaft of the motor body (2) is sleeved with a protective sleeve (201); a wear-resistant sleeve (202) is mounted inside the protective sleeve (201); a waterproof sleeve (203) is mounted inside the wear-resistant sleeve (202); and a protective plate (204) is mounted at the front end of the protective sleeve (201); An extension plate (3) is arranged on the front side of the protective cover (101), the extension plate (3) having an extension hole (301) through which the output shaft of the motor body (2) and the protective cover (201) pass, and a notch is arranged on the protective cover (101) to facilitate the passage of the output shaft of the motor body (2) and the protective cover (201).

2. The brushless DC fan motor according to claim 1, characterized in that: The top and bottom of the extension plate (3) are both provided with a first connection plate (5), the top and bottom of the protection cover (101) are both provided with a second connection plate (501) corresponding to the first connection plate (5), and the first connection plate (5) and the second connection plate (501) are connected via a connection bolt (502).

3. The brushless DC fan motor according to claim 1, characterized in that: The protection box (1) is provided with a limiting groove (4) inside thereof for being mounted in cooperation with the motor body (2), and a protection pad (401) in contact with the motor body (2) is arranged inside the limiting groove (4).

4. The brushless DC fan motor according to claim 1, characterized in that: Positioning plates (6) are provided at the lower ends of both left and right sides of the protection box (1), and positioning bolts (601) are installed through the interior of the positioning plates (6); The upper and lower ends of the protection cover (101) are provided with threaded holes (102) and are threadedly connected with fixing bolts (103), and the front side of the protection box (1) is provided with a threaded hole countersunk that matches the fixing bolts (103).

5. The brushless DC fan motor according to claim 1, characterized in that: The thickness of the protective cover (201), the wear-resistant cover (202) and the waterproof cover (203) is 0.1-0.2 mm.

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