Brushless motor waterproof structure

Abstract

The utility model discloses a brushless motor waterproof structure relates to brushless motor technical field, including the waterproof mechanism of multiple having the heat dissipation capacity of setting on the casing, the waterproof mechanism is including the mounting seat of screw connection with the casing, the lower part of mounting seat is equipped with magnetic switch subassembly, the mounting seat top is connected with renewable drying subassembly, still be equipped with emergency sealing subassembly on the mounting seat, the utility model discloses through the new emergency sealing subassembly, when the magnetic switch failure, can rotate the knob by hand, through the synchronous drive of elastic connecting rod three sealing blocks centripetal closing, complete emergency sealing, reached " electronic out of control still can in situ manual valve " the redundancy safety demand.

Description

Technical Field

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

[0002] A brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Because a brushless DC motor operates in a self-controlled manner, it does not require an additional starting winding on the rotor like a synchronous motor that starts under heavy load with frequency conversion speed regulation, nor does it experience oscillation or loss of synchronism during sudden load changes.

[0003] In order to ensure the safety, efficiency and service life of ordinary brushless motors, heat dissipation is required during use. The traditional method is to use a labyrinth structure for heat dissipation and prevent water vapor from rushing into the stator and causing damage. However, when the motor stops working, water vapor will backflow and enter the stator, affecting the motor's safety.

[0004] To address the aforementioned issues, patent CN218897129U discloses a waterproof structure for a brushless motor. This structure involves installing multiple heat dissipation pipes on the brushless motor housing and linking these pipes with an electromagnet. When the motor is running, the electromagnet is momentarily energized to generate magnetic force, attracting a sealing plate to open the heat dissipation pipes for heat dissipation. After the motor stops, the electromagnet is de-energized, and a spring causes the sealing plate to automatically close the heat dissipation pipes, preventing moisture from entering and achieving both efficient heat dissipation and reliable waterproofing.

[0005] However, the above structure still has some problems in use. On the one hand, the electromagnet may experience a "perpetually on" fault during use (MOSFET breakdown, H-bridge short circuit, PWM chip deadlock, etc.), causing the sealing plate to be constantly attracted by the electromagnet. At this time, the inside of the motor is permanently open, and water vapor flows back in under the negative pressure of high-speed operation, which has caused several winding breakdowns and whole machine burnout accidents. On the other hand, the absorbent cotton is a consumable and needs to be replaced manually. Repeated disassembly and assembly are inconvenient and easy to forget.

[0006] Based on this, a waterproof structure for a brushless motor is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0007] The purpose of this invention is to provide a waterproof structure for a brushless motor to solve the problems in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: A waterproof structure for a brushless motor includes multiple waterproof mechanisms with heat dissipation capabilities mounted on a housing. Each waterproof mechanism includes a mounting base threadedly connected to the housing. A magnetic switch assembly is provided at the lower part of the mounting base, and a regenerative drying assembly is threadedly connected to the top of the mounting base. An emergency sealing assembly is also provided on the mounting base.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: the mounting base includes a sleeve threaded to the housing, the lower part of the sleeve having an annular baffle, and the upper part of the sleeve having an annular seat for installing an emergency sealing assembly.

[0010] In one alternative: the annular seat has an annular groove for installing an emergency sealing assembly, and the annular groove has three slots distributed around its side circumference.

[0011] In one alternative embodiment: the magnetic switch assembly includes a fixing plate fixed inside the sleeve, a guide rod fixed at the lower end of the fixing plate, a sealing plate slidably mounted on the guide rod, a return spring between the sealing plate and the fixing plate, an iron sheet on one side of the sealing plate, and an electromagnet fixed at one end of the guide rod.

[0012] In one alternative: the regenerative drying assembly includes a box for holding a desiccant, the lower end of the box is provided with a connecting seat that is threaded to a sleeve, and the sleeve is provided with a plurality of vent holes.

[0013] In one alternative: the desiccant is silica gel particles and a color-changing indicator.

[0014] In one alternative: the emergency sealing assembly includes three sealing blocks installed in an annular groove, one end of each sealing block is provided with a rotating seat, the rotating seat is rotatably connected to the annular seat, and a driving component is sleeved on the outside of the annular seat.

[0015] In one alternative embodiment: the driving component includes a knob rotatably mounted on an annular seat, with damping provided between the knob and the annular seat, and an elastic connecting rod provided inside the knob, one end of which passes through a slot and connects to the rotating seat.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by adding an emergency sealing component, allows the knob to be rotated by hand when the magnetic switch fails. The elastic connecting rod synchronously drives the three sealing blocks to close inward, completing the emergency seal and achieving the redundant safety requirement of "manually closing the valve on-site even if the electronic control fails".

[0017] 2. This utility model replaces the absorbent cotton with a regenerable drying component. A visual box is set on the top of the mounting base and filled with silica gel particles and color-changing indicators, which achieves an immediate visual alarm when the humidity exceeds the limit. Furthermore, the motor heat dissipation can dry the silica gel particles to a certain extent, improving the service life of the silica gel particles and solving the problem of frequent disassembly and replacement of traditional absorbent cotton. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the emergency sealing component in this utility model.

[0020] Figure 3 This is a schematic diagram of the mounting base in this utility model.

[0021] Figure reference numerals: 100, housing; 200, waterproof mechanism; 300, mounting base; 301, sleeve; 302, annular baffle; 303, annular seat; 304, annular groove; 305, slot; 400, magnetic switch assembly; 401, fixing plate; 402, guide rod; 403, sealing plate; 404, return spring; 405, iron sheet; 406, electromagnet; 500, regenerative drying assembly; 501, box body; 502, connecting seat; 503, vent; 600, emergency sealing assembly; 601, sealing block; 602, rotating seat; 603, knob; 604, elastic connecting rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In one embodiment, such as Figure 1 and Figure 2As shown, a waterproof structure for a brushless motor includes multiple waterproof mechanisms 200 with heat dissipation capabilities mounted on a housing 100. Each waterproof mechanism 200 includes a mounting base 300 threadedly connected to the housing 100. A magnetic switch assembly 400 is located at the lower part of the mounting base 300, and a regenerable drying assembly 500 is threadedly connected to the top of the mounting base 300. An emergency sealing assembly 600 is also provided on the mounting base 300. In use, when the motor is working, the magnetic switch assembly 400 opens the mounting base 300, allowing the heat inside the motor to dissipate through the mounting base 300. When the motor stops working, the magnetic switch assembly 400 closes the mounting base 300 to prevent moisture from flowing back into the motor. At the same time, the regenerable drying assembly 500 adsorbs moisture, achieving a waterproof effect. When the magnetic switch assembly 400 fails, the emergency sealing assembly 600 temporarily closes the mounting base 300 to prevent the mounting base 300 from being in an open state, which could lead to moisture backflow.

[0024] In one embodiment, such as Figure 2 and Figure 3 As shown, the mounting base 300 includes a sleeve 301 threadedly connected to the housing 100. The lower part of the sleeve 301 is provided with an annular baffle 302, and the upper part of the sleeve 301 is provided with an annular seat 303 for installing the emergency sealing component 600. The annular seat 303 is provided with an annular groove 304 for installing the emergency sealing component 600. The annular groove 304 has three slots 305 distributed on the circumference of its side. When the motor is working, the heat inside the motor is discharged to the outside through the sleeve 301.

[0025] In one embodiment, such as Figure 2 As shown, the magnetic switch assembly 400 includes a fixing plate 401 fixed inside the sleeve 301. A guide rod 402 is fixed to the lower end of the fixing plate 401. A sealing plate 403 is slidably mounted on the guide rod 402. A return spring 404 is provided between the sealing plate 403 and the fixing plate 401. An iron piece 405 is provided on one side of the sealing plate 403. An electromagnet 406 is fixed to one end of the guide rod 402. In use, when the motor is working, the circuit of the electromagnet 406 is simultaneously turned on. The electromagnet 406 attracts the sealing plate 403, causing the sealing plate 403 to slide along the guide rod 402 and leave the annular baffle 302, thereby putting the sleeve 301 in the open state. When the motor stops working, the circuit of the electromagnet 406 is turned off, and the sealing plate 403, under the action of the return spring 404, re-presses against the annular baffle 302, thereby putting the sleeve 301 in the closed state.

[0026] In one embodiment, such as Figure 2As shown, the regenerative drying assembly 500 includes a box 501 for holding desiccant. The lower end of the box 501 is provided with a connecting seat 502 that is threadedly connected to the sleeve 301. The sleeve 301 has several vent holes 503. The desiccant is silica gel particles and a color-changing indicator. The silica gel particles adsorb moisture in the air to prevent moisture from flowing back into the motor. The color-changing indicator is used to determine the humidity of the silica gel particles so that they can be replaced in time.

[0027] In one embodiment, such as Figure 2 As shown, the emergency sealing assembly 600 includes three sealing blocks 601 installed in the annular groove 304. One end of each sealing block 601 is provided with a rotating seat 602, which is rotatably connected to the annular seat 303. A driving component is sleeved on the outside of the annular seat 303. The driving component includes a knob 603 that is rotatably sleeved on the annular seat 303. A damping is provided between the knob 603 and the annular seat 303. An elastic connecting rod 604 is provided inside the knob 603. One end of the elastic connecting rod 604 passes through the slot 305 and is connected to the rotating seat 602. When the electromagnet 406 has a "normally open" fault, rotating the knob 603 will drive the three sealing blocks 601 to close synchronously inward through the elastic connecting rod 604, thus completing the emergency sealing.

[0028] The above embodiments disclose a waterproof structure for a brushless motor. By adding an emergency sealing component 600, when the magnetic switch fails, the knob 603 can be manually rotated, and the three sealing blocks 601 will be driven to close concentrically through the elastic connecting rod 604, thus completing the emergency seal and achieving the redundancy safety requirement of "manual valve closure even in the event of electronic failure". In addition, by replacing the absorbent cotton with a regenerable drying component 500, a visible box 501 is set on the top of the mounting base 300 and filled with silica gel particles and color-changing indicators, an immediate visual alarm is achieved when the humidity exceeds the limit. Furthermore, the motor heat dissipation can dry the silica gel particles to a certain extent, improving the service life of the silica gel particles and solving the problem of frequent disassembly and replacement of traditional absorbent cotton.

[0029] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A waterproof structure of a brushless motor, comprising a plurality of waterproof mechanisms (200) having heat dissipation ability provided on a housing (100), characterized in that, The waterproof mechanism (200) includes a mounting base (300) threadedly connected to the housing (100), a magnetic switch assembly (400) at the lower part of the mounting base (300), a regenerative drying assembly (500) threadedly connected to the top of the mounting base (300), and an emergency sealing assembly (600) on the mounting base (300).

2. The waterproof structure of a brushless motor according to claim 1, wherein The mounting base (300) includes a sleeve (301) threadedly connected to the housing (100), the lower part of the sleeve (301) is provided with an annular baffle (302), and the upper part of the sleeve (301) is provided with an annular seat (303) for installing the emergency sealing assembly (600).

3. The waterproof structure of a brushless motor according to claim 2, wherein The annular seat (303) is provided with an annular groove (304) for installing an emergency sealing assembly (600), and the annular groove (304) has three slots (305) distributed on the circumference of its side.

4. The waterproof structure of a brushless motor according to claim 1, wherein The magnetic switch assembly (400) includes a fixing plate (401) fixed inside a sleeve (301), a guide rod (402) fixed at the lower end of the fixing plate (401), a sealing plate (403) slidably disposed on the guide rod (402), a reset spring (404) disposed between the sealing plate (403) and the fixing plate (401), an iron sheet (405) disposed on one side of the sealing plate (403), and an electromagnet (406) fixed at one end of the guide rod (402).

5. The waterproof structure of a brushless motor according to claim 1, wherein The renewable drying assembly (500) includes a box (501) for holding desiccant, the lower end of the box (501) is provided with a connecting seat (502) that is threadedly connected to the sleeve (301), and the sleeve (301) is provided with a plurality of vent holes (503).

6. The waterproof structure of a brushless motor according to claim 5, wherein The desiccant consists of silica gel particles and a color-changing indicator.

7. The waterproof structure of a brushless motor according to claim 1, wherein The emergency sealing assembly (600) includes three sealing blocks (601) installed in an annular groove (304). One end of each sealing block (601) is provided with a rotating seat (602). The rotating seat (602) is rotatably connected to the annular seat (303). A driving component is sleeved on the outside of the annular seat (303).

8. The waterproof structure of a brushless motor according to claim 7, wherein The driving component includes a knob (603) that is rotatably sleeved on an annular seat (303). The knob (603) and the annular seat (303) are provided with damping. An elastic connecting rod (604) is provided inside the knob (603). One end of the elastic connecting rod (604) passes through a slot (305) and is connected to the rotating seat (602).

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