Motor with short circuit protection structure

Abstract

The utility model discloses a motor with short circuit protection structure belongs to motor technical field, including motor main part, the side of motor main part rotatory connection has motor shaft, and the side surface of motor main part installs the sealing structure with the corresponding position of motor shaft, and the surface of motor shaft is equipped with a plurality of installation groove, the utility model sets up sealing structure, through the sealing rotation of sealing bearing no.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a motor with a short-circuit protection structure. Background Technology

[0002] In the electric toothbrush industry, the motor is a core component, and its performance directly affects the user experience and safety of the product. In recent years, motors with power-off braking functions have gradually gained attention. These motors can brake rapidly upon power failure, preventing the motor shaft from continuing to rotate due to inertia. This function is particularly important for electric toothbrushes because it ensures that the brush head stops rotating immediately when power is interrupted, avoiding accidental damage to oral tissues caused by inertia from the bristles, thereby improving the safety and reliability of the product.

[0003] Existing electric toothbrush motors have the following drawbacks: poor sealing, wear and tear over time, allowing water to enter the motor and affecting its operation; poor heat dissipation of the casing, leading to heat buildup in the motor and reduced power; and the lack of short-circuit protection when exposed to water, causing damage to the motor.

[0004] Therefore, a motor with a short-circuit protection structure is designed to solve the above problems. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a motor with a short-circuit protection structure, featuring good sealing, resistance to water ingress, good heat dissipation, and short-circuit protection.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a motor with a short-circuit protection structure, comprising a motor body, a motor shaft rotatably connected to the side of the motor body, a sealing structure installed on the side surface of the motor body corresponding to the position of the motor shaft, a plurality of mounting grooves opened on the surface of the motor shaft, a short-circuit protection structure installed at the wire inlet on the side of the motor body, and a heat dissipation structure provided on the surface of the motor body.

[0007] The sealing structure includes a sealing cover, which is installed on the side of the motor body. An installation ring is bonded to the side surface of the motor body. The installation ring and the sealing cover are bonded and fixed with strong adhesive. Several sealing components are provided inside the sealing cover. A sealing bearing that is rotatably connected to the motor shaft is installed in the middle of the side of the sealing cover.

[0008] Preferably, the sealing assembly includes inclined sealing plates, and a plurality of inclined sealing plates are installed at equal intervals inside the sealing cover. A sealing bearing II is glued to the middle of the inclined sealing plates, and the sealing bearing II is rotatably connected to the motor shaft.

[0009] Preferably, the side of the sealing cover and the downwardly inclined part of the inclined sealing plate are provided with drainage holes.

[0010] Preferably, the heat dissipation structure includes annular heat dissipation grooves, and a plurality of annular heat dissipation grooves are equally spaced on the surface of the motor body.

[0011] Preferably, the heat dissipation structure includes linear heat-conducting grooves, and a plurality of linear heat-conducting grooves are provided on the flat surface of the motor body.

[0012] Preferably, the short-circuit protection structure includes a control board, which is installed at the side wire inlet of the motor body. An electrode-type water leakage sensor is provided on one side of the control board, and a short-circuit breaker is installed on the surface of the control board. A mounting cover is provided on the outside of the short-circuit breaker, the control board, and the electrode-type water leakage sensor.

[0013] Preferably, a sealing ring is provided on the side of the motor body outside the control board and the electrode-type water leakage sensor, and the sealing ring is fixed to the mounting cover by adhesive.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model features a sealing structure. The sealing bearing ensures stable rotation of the motor shaft while preventing water from entering the motor body. The sealing cover and mounting ring are bonded together with strong adhesive to ensure a tight seal. The sealing components further enhance the sealing effect between the motor shaft and the motor body, preventing water leakage from the motor body that could cause short circuits and affect service life. Multiple inclined sealing plates inside the sealing cover intercept water flow. The sealing bearing ensures the motor shaft rotates in a sealed manner, preventing water entering the sealing cover from the sealing bearing and flowing into the motor body, thus improving the sealing performance. Drainage holes on the side of the sealing cover allow water to drain out, preventing it from seeping into the motor body and ensuring a tight seal between the motor shaft and the motor body, thereby extending service life.

[0016] 2. This utility model is equipped with a heat dissipation structure. The annular heat dissipation groove creates a gap between the outer shell of the motor body and the inner shell of the electric toothbrush, which facilitates heat dissipation. The heat dissipated by the annular heat dissipation groove is dissipated through the linear heat conduction groove, which improves the heat dissipation effect and enables the motor body to use stable power for a long time.

[0017] 3. This utility model is equipped with a short-circuit protection structure. It uses an electrode-type water leakage sensor for detection. When water leakage is detected, the control board issues a command to activate the short-circuit breaker, which cuts off the current input to the motor body, thereby achieving short-circuit protection for the motor body and preventing short-circuit damage to the motor body. The mounting cover and the sealing ring are bonded together with glue to seal the inlet of the motor body and ensure normal use. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the sealing structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the short-circuit protection structure of this utility model;

[0021] In the diagram: 1. Motor body; 2. Sealing structure; 21. Mounting ring; 22. Sealing assembly; 221. Inclined sealing plate; 222. Sealed bearing two; 23. Sealed bearing one; 24. Sealing cover; 25. Drain hole; 3. Mounting groove; 4. Motor shaft; 5. Heat dissipation structure; 51. Annular heat dissipation groove; 52. Linear heat conduction groove; 6. Short circuit protection structure; 61. Sealing ring; 62. Mounting cover; 63. Short circuit breaker; 64. Control board; 65. Electrode-type water leakage sensor. Detailed Implementation

[0022] 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.

[0023] A motor with a short-circuit protection structure includes a motor body 1, a motor shaft 4 rotatably connected to the side of the motor body 1, a sealing structure 2 installed on the side surface of the motor body 1 at a position corresponding to the motor shaft 4, a plurality of mounting grooves 3 opened on the surface of the motor shaft 4, a short-circuit protection structure 6 installed at the wire inlet on the side of the motor body 1, and a heat dissipation structure 5 provided on the surface of the motor body 1.

[0024] The sealing structure 2 includes a sealing cover 24. The sealing cover 24 is installed on the side of the motor body 1. An installation ring 21 is bonded to the side surface of the motor body 1. The installation ring 21 and the sealing cover 24 are bonded and fixed with strong adhesive. Several sealing components 22 are provided inside the sealing cover 24. A sealing bearing 23 that is rotatably connected to the motor shaft 4 is installed in the middle of the side of the sealing cover 24.

[0025] In this embodiment, see Figure 1-2The motor body 1 is installed and fixed inside the electric toothbrush housing. The sealed rotation of the bearing 23 ensures the stable rotation of the motor shaft 4 while preventing water from entering the motor body 1. The sealing cover 24 and the mounting ring 21 are bonded and sealed with strong adhesive to ensure airtightness. The sealing component 22 further seals and improves the sealing effect between the motor shaft 4 and the motor body 1, preventing water leakage from the motor body 1 from causing a short circuit and affecting its service life. The heat dissipation structure 5 dissipates heat, and the short circuit protection structure 6 provides short circuit protection.

[0026] Specifically, the sealing assembly 22 includes an inclined sealing plate 221. Several inclined sealing plates 221 are installed at equal intervals inside the sealing cover 24. A sealing bearing 222 is glued to the middle of the inclined sealing plate 221. The sealing bearing 222 is rotatably connected to the motor shaft 4.

[0027] In this embodiment, see Figure 2 Multiple sets of inclined sealing plates 221 inside the sealing cover 24 intercept water, and the sealing bearing 222 causes the motor shaft 4 to rotate in a sealed manner, preventing water from entering the sealing cover 24 from the sealing bearing 23 and flowing into the motor body 1 along the motor shaft 4, thereby improving the sealing performance.

[0028] Specifically, drainage holes 25 are provided on the side of the sealing cover 24 and at the downward inclined part of the inclined sealing plate 221.

[0029] In this embodiment, see Figure 2 Water seeping into the sealing cover 24 can be drained through the drainage hole 25 on the side of the sealing cover 24, preventing water from seeping into the motor body 1 in the sealing cover 24, ensuring the sealing between the motor shaft 4 and the motor body 1, and improving service life.

[0030] Specifically, the heat dissipation structure 5 includes annular heat dissipation grooves 51, and a plurality of annular heat dissipation grooves 51 are equally spaced on the surface of the motor body 1.

[0031] In this embodiment, see Figure 1 By providing several annular heat dissipation grooves 51 around the surface of the motor body 1, a gap is created between the outer shell of the motor body 1 and the inside of the electric toothbrush housing, which facilitates heat dissipation and allows the motor body 1 to operate at stable power for a long time.

[0032] Specifically, the heat dissipation structure 5 includes linear heat conduction grooves 52, and a number of linear heat conduction grooves 52 are provided on the flat surface of the motor body 1.

[0033] In this embodiment, see Figure 1 By providing several linear heat-conducting grooves 52 on the plane of the motor body 1, the heat conducted by the annular heat dissipation grooves 51 is dissipated through the linear heat-conducting grooves 52, thereby improving the heat dissipation effect and enabling the motor body 1 to use stable power for a long time.

[0034] Specifically, the short-circuit protection structure 6 includes a control board 64. The control board 64 is installed at the side wire inlet of the motor body 1. An electrode-type water leakage sensor 65 is provided on one side of the control board 64. A short-circuit breaker 63 is installed on the surface of the control board 64. An installation cover 62 is provided on the outside of the short-circuit breaker 63, the control board 64 and the electrode-type water leakage sensor 65.

[0035] In this embodiment, see Figure 3 The leakage is detected by the electrode-type water leakage sensor 65. When water leakage is detected, the control board 64 issues a command to activate the short-circuit breaker 63, which cuts off the current input to the motor body 1, thereby achieving short-circuit protection for the motor body 1 and preventing short-circuit damage to the motor body 1.

[0036] Specifically, a sealing ring 61 is provided on the side of the motor body 1 outside the control board 64 and the electrode-type water leakage sensor 65. The sealing ring 61 is fixed to the mounting cover 62 by adhesive.

[0037] In this embodiment, see Figure 3 The mounting cover 62 and the sealing ring 61 are bonded together with glue to seal the inlet of the motor body 1 and ensure normal use.

[0038] The short-circuit breaker 63, control board 64, and electrode-type water leakage sensor 65 in this utility model are all conventional instruments that can meet the functions of this utility model, so they will not be described in detail. The control method of this utility model is controlled by the control board 64. The control circuit of the control board 64 can be implemented by those skilled in the art through simple programming. This utility model will not explain the control method and circuit connection in detail.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor with a short-circuit protection structure, comprising a motor body (1), characterized in that: The motor body (1) is rotatably connected to a motor shaft (4). A sealing structure (2) is installed on the side surface of the motor body (1) at the corresponding position of the motor shaft (4). Several mounting grooves (3) are opened on the surface of the motor shaft (4). A short circuit protection structure (6) is installed at the wire inlet on the side of the motor body (1). A heat dissipation structure (5) is provided on the surface of the motor body (1). The sealing structure (2) includes a sealing cover (24). The sealing cover (24) is installed on the side of the motor body (1). An installation ring (21) is bonded to the side surface of the motor body (1). The installation ring (21) and the sealing cover (24) are bonded and fixed by strong adhesive. Several sealing components (22) are provided inside the sealing cover (24). A sealing bearing (23) that is rotatably connected to the motor shaft (4) is installed in the middle of the side of the sealing cover (24).

2. The motor with a short-circuit protection structure according to claim 1, characterized in that: The sealing assembly (22) includes an inclined sealing plate (221). Several inclined sealing plates (221) are installed at equal intervals inside the sealing cover (24). A sealing bearing (222) is glued to the middle of the inclined sealing plate (221). The sealing bearing (222) is rotatably connected to the motor shaft (4).

3. A motor with a short-circuit protection structure according to claim 2, characterized in that: Drainage holes (25) are provided on the side of the sealing cover (24) and at the downward tilt of the inclined sealing plate (221).

4. A motor with a short-circuit protection structure according to claim 1, characterized in that: The heat dissipation structure (5) includes annular heat dissipation grooves (51), and the surface of the motor body (1) is provided with several annular heat dissipation grooves (51) at equal intervals.

5. A motor with a short-circuit protection structure according to claim 1, characterized in that: The heat dissipation structure (5) includes linear heat conduction grooves (52), and the surface of the motor body (1) is provided with a number of linear heat conduction grooves (52).

6. A motor with a short-circuit protection structure according to claim 1, characterized in that: The short-circuit protection structure (6) includes a control board (64). The control board (64) is installed at the side wire inlet of the motor body (1). An electrode-type water leakage sensor (65) is provided on one side of the control board (64). A short-circuit breaker (63) is installed on the surface of the control board (64). An installation cover (62) is provided on the outside of the short-circuit breaker (63), the control board (64) and the electrode-type water leakage sensor (65).

7. A motor with a short-circuit protection structure according to claim 6, characterized in that: A sealing ring (61) is provided on the side of the motor body (1) outside the control board (64) and the electrode-type water leakage sensor (65). The sealing ring (61) is fixed to the mounting cover (62) by adhesive.

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