Waterproof brushless motor

Abstract

The waterproof brushless motor comprises a casing, a rotor and a stator, the rotor and the stator are both arranged in the casing, the casing is composed of a base and an upper cover, the surface of the base is provided with an annular clamping groove, a first sealing strip tightly attached to one side is arranged in the clamping groove, one end of the upper cover is open, and the open end is inserted into the clamping groove to be fixed. The side face of the end, inserted into the clamping groove, of the upper cover is provided with a plurality of protruding particles extruded by the first sealing strip, the outer side face of the end, inserted into the clamping groove, of the upper cover is further provided with a bent part which is tightly attached to the outer side of the base after being bent and fixed, and a second sealing strip is arranged between the bent part and the base. When the upper cover is connected with the base, the clamping groove inserted into the upper cover is formed in the surface of the base, the joint is extruded and sealed through the first sealing strip and the convex particles on the surface of the upper cover, meanwhile, the bent part which is tightly attached to the outer side of the base after being bent is further arranged on the outer side of the upper cover, and the joint is sealed through the second sealing strip, so that the sealing performance during connection is effectively improved; and the waterproof effect is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically a waterproof brushless motor. Background Technology

[0002] In the field of electronic devices, brushless motors are widely used in various scenarios due to their advantages such as high efficiency, low noise, and long lifespan, especially in applications requiring waterproofing, such as underwater robots, submersible pumps, and outdoor security equipment. However, traditional brushless motor designs often struggle to achieve ideal waterproofing while maintaining high performance. Once the electronic components and windings inside the motor come into contact with moisture, they are highly susceptible to short circuits, corrosion, and other malfunctions, leading to motor damage or even safety accidents.

[0003] However, to achieve waterproofing for brushless motors, existing technologies typically employ the following methods: First, completely sealing the motor interior with potting compound. While this method effectively waterproofs, the use of potting compound increases the motor's weight, affects heat dissipation, and makes handling the potting compound extremely difficult should the motor require repair or replacement of parts. Second, designing complex waterproof structures, such as adding waterproof gaskets or coatings, is another method. However, these methods are often complex, costly to manufacture, and their waterproofing effect is difficult to guarantee, and may even affect the motor's operation. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a waterproof brushless motor, which can effectively solve the technical problem of poor waterproof performance of current brushless motors.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A waterproof brushless motor includes a housing, a rotor, and a stator. The rotor and stator are both housed within the housing. The housing consists of a base and a top cover. The base has an annular groove on its surface, and a first sealing strip is provided in the groove, closely adhering to one side. One end of the top cover is open and is inserted into the groove for fixation. The side of the top cover at the end inserted into the groove has multiple protrusions that press against the first sealing strip. The outer side of the top cover at the end inserted into the groove also has a bent portion that is bent and adheres closely to the outer side of the base for fixation. A second sealing strip is provided between the bent portion and the base.

[0007] Furthermore, the base surface is connected to a circuit board with a central cutout, and the bottom of the base is provided with a power interface that is electrically connected to the circuit board.

[0008] Furthermore, the base surface is provided with a mounting slot for placing and fixing the circuit board, and the mounting slot is provided with a connecting post that supports and locks the circuit board.

[0009] Furthermore, the slot opening is provided with an inclined surface whose width gradually increases towards one end of the opening.

[0010] Furthermore, the rotor consists of a rotating shaft and an iron core. One end of the rotating shaft is inserted into the middle of the base, and the other end passes through the top cover away from the base and extends outward. The iron core is fixed on the outside of the rotating shaft and coaxially arranged.

[0011] Furthermore, the stator is coaxially arranged with the rotor and closely attached to the inner wall of the upper cover. The inner side of the stator is provided with multiple windings that protrude towards the central axis, and the windings are wound with conductive copper wires.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the upper cover and the base are connected, the present invention provides a slot for inserting the upper cover on the surface of the base, and uses the first sealing strip and the protrusions on the surface of the upper cover to squeeze and seal at the connection. At the same time, the upper cover is also provided with a bent part that fits tightly against the outer side of the base after bending, and the connection is sealed with a second sealing strip, which effectively improves the sealing performance during connection and enhances the waterproof effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the top structure of the overall structure in this embodiment;

[0015] Figure 2 This is a schematic diagram of the bottom structure of the overall structure in this embodiment;

[0016] Figure 3 This is an example. Figure 2 Enlarged schematic diagram of section A in the middle;

[0017] Figure 4 This is a schematic diagram of the base connecting the rotor in this embodiment;

[0018] Figure 5 This is a schematic diagram of the upper cover connecting to the stator structure in this embodiment;

[0019] Figure 6 This is a schematic diagram of the circuit board structure assembled on the base in this embodiment;

[0020] Figure 7 This is a schematic diagram of the internal structure of the base in this embodiment;

[0021] Figure 8 This is an example. Figure 7 Enlarged schematic diagram of section B;

[0022] Numbering on the map:

[0023] 1-Housing, 2-Rotor, 3-Stator, 4-Slot, 5-First sealing strip, 6-Protrusion, 7-Bending part, 8-Second sealing strip, 9-Circuit board, 10-Power port, 11-Loading slot, 12-Connecting post, 13-Inclined surface, 14-Copper wire;

[0024] 101-Base, 102-Top cover; 201-Rotating shaft, 202-Iron core; 301-Winding. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-8 As shown, this utility model provides a waterproof brushless motor, mainly used in a drive motor. The internal connection structure of the entire brushless motor is optimized, and the sealing performance of the connection is enhanced by the use of sealing strips, which achieves a good waterproof effect for the entire brushless motor.

[0027] The entire brushless motor structure mainly consists of a housing 1, a rotor 2, and a stator 3. The housing 1 is located on the outside, while the rotor 2 and stator 3 are assembled inside the housing 1. To facilitate the assembly of the internal rotor 2 and stator 3, the housing 1 is composed of a base 101 and a top cover 102. After the base 101 and top cover 102 are assembled, a sealed cavity structure is formed inside, which is the space for installing the rotor 2 and stator 3. When the base 101 and top cover 102 are connected, to enhance the sealing of the connection, a slot 4 is added to the surface of the base 101 to engage the top cover 102. The slot 4 is annular and matches the size of the opening of the top cover 102. The opening of the slot 4 has an inclined surface 13 whose width gradually increases towards one end of the opening, facilitating the insertion of the top cover 102 into the slot 4. Meanwhile, a first sealing strip 5 is also provided in the slot 4, which is close to the outside. At this time, in order to enhance the sealing between the upper cover 102 and the first sealing strip 5 in the slot 4, a number of raised protrusions 6 are provided on the outside of the upper cover 102. When the upper cover 102 is inserted into the slot 4, the protrusions 6 and the first sealing strip 5 are squeezed together, which enhances the sealing of the connection and improves the waterproof effect.

[0028] In addition, an integrally connected bent portion 7 is provided on the outer side of the upper cover 102. This bent portion 7 extends outward and then bends to fit tightly against the outer side of the base 101 for fixation. A second sealing strip 8 is added between the bent portion 7 and the outer side of the base 101 for sealing. The second sealing strip 8 enhances the sealing performance after connection, which also improves the waterproof effect at the connection point. At the same time, the bent portion 7 can also be fixed to the base 101 with screws on the outer side.

[0029] The rotor 2 of the brushless motor rotates inside the housing 1. The rotor's structure mainly consists of a rotating shaft 201 and an iron core 202. One end of the rotating shaft 201 is inserted into the middle of the base 101, and the other end passes through the end of the upper cover 102 away from the base and extends forward through the upper cover 102. A protrusion for easy fixing can also be provided at the extended end. The iron core 202 is mainly located on the outer side of the rotating shaft 201. The iron core 202 and the rotating shaft 201 can be detachable, and the iron core 202 and the rotating shaft 201 are coaxially arranged.

[0030] The stator 3 of the brushless motor is fixed inside the upper cover 102. The outer side of the stator 3 is annular and tightly fixed to the inner wall of the upper cover 102. Multiple windings 301 protruding towards the central axis are also provided inside the stator 3, each winding 301 being wound with copper wire 14. During operation, when current is applied to the copper wire 14, a magnetic field is generated inside the stator 3 that causes the rotor 2 to rotate.

[0031] In addition, a control drive circuit board 9 is also installed inside the base 101. To avoid affecting the rotation and connection of the rotor 2, the center of the circuit board 9 is hollowed out. In use, the circuit board 9 needs to be connected to the copper wire 14 for power supply, and a power connection port 10 for electrical connection with the circuit board 9 is provided at the bottom of the base 101. In order to better fix the position of the circuit board 9, a mounting slot 11 for placing the circuit board 9 is provided on the surface of the base 101, and three protrusions are provided at the bottom of the mounting slot 11 for supporting and fixing the connecting post 12 of the circuit board 9. The user can use screws to lock the circuit board to the top of the connecting post 12.

[0032] Compared with traditional technology, this technical solution provides a slot 4 for inserting the upper cover 102 into the base 101 when the upper cover 102 is connected to the base 101. The connection is sealed by the first sealing strip 5 and the protrusions 6 on the surface of the upper cover 102. At the same time, the upper cover 102 is also provided with a bent part 7 that is bent and fits tightly against the outside of the base 101. The connection is sealed by the second sealing strip 8, which effectively improves the sealing performance during connection and enhances the waterproof effect.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A waterproof brushless motor, comprising a housing, a rotor, and a stator, wherein the rotor and stator are both disposed within the housing, characterized in that: The housing consists of a base and a top cover. The base has an annular groove on its surface and a first sealing strip that fits tightly against one side inside the groove. The top cover has an opening at one end, which is inserted into the groove and fixed in place. The side of the top cover that is inserted into the groove has multiple protrusions that press against the first sealing strip. The outer side of the top cover that is inserted into the groove also has a bent part that is bent and fits tightly against the outside of the base and fixed in place. A second sealing strip is provided between the bent part and the base.

2. The waterproof brushless motor according to claim 1, characterized in that: The base surface is connected to a circuit board with a central cutout, and the bottom of the base is provided with a power interface that is electrically connected to the circuit board.

3. A waterproof brushless motor according to claim 2, characterized in that: The base surface is provided with a mounting slot for placing and fixing the circuit board, and the mounting slot is provided with a connecting post that supports and locks the circuit board.

4. A waterproof brushless motor according to claim 1, characterized in that: The slot opening has an inclined surface whose width gradually increases towards one end of the opening.

5. A waterproof brushless motor according to claim 1, characterized in that: The rotor consists of a rotating shaft and an iron core. One end of the rotating shaft is inserted into the middle of the base, and the other end passes through the top cover away from the base and extends outward. The iron core is fixed on the outside of the rotating shaft and is coaxially arranged.

6. A waterproof brushless motor according to claim 1, characterized in that: The stator is coaxially mounted with the rotor and closely attached to the inner wall of the upper cover. The inner side of the stator is provided with multiple windings that protrude towards the central axis, and the windings are wound with conductive copper wires.

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