A waterproof motor with an external rotor

Abstract

This application provides an external rotor waterproof motor, applicable to the field of motor processing technology. It comprises an aluminum alloy base, a stainless steel shaft, an external rotor, a stator, a potting sleeve, ceramic bearings, and a circuit board. The aluminum alloy base, stator, and external rotor are adapted to the stainless steel shaft to form the motor. The potting sleeve is located on the stator, with potting compound between the sleeve and the stator. The ceramic bearings are located on both sides of the stator, and the stainless steel shaft passes through the two ceramic bearings and connects to the aluminum alloy base. The circuit board is located on the aluminum alloy base. This solution addresses the technical problems of current conventional external rotor motors, which require adding an outer shell and applying oil seals to the front and rear bearings for waterproofing. These methods suffer from high friction between the oil seals and the shaft, resulting in additional power loss, and a deterioration in sealing performance over time.

Description

Technical Field

[0001] This application relates to the field of motor processing technology, and in particular to a waterproof external rotor motor. Background Technology

[0002] An electric motor, commonly known as a "motor," is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It is divided into electric motors and generators.

[0003] The current working principle of DC motors is that the direction of the force on the conductor is determined by the left-hand rule. This pair of electromagnetic forces forms a torque acting on the armature. This torque is called electromagnetic torque in rotating motors. The direction of the torque is counterclockwise, attempting to make the armature rotate counterclockwise. If this electromagnetic torque can overcome the resistance torque on the armature (such as the resistance torque caused by friction and other load torques), the armature can rotate counterclockwise.

[0004] Regardless of whether it is a brushed or brushless motor, AC or DC, waterproofing a typical external rotor motor requires adding an outer shell to the motor and applying oil seals to the outer sides of the front and rear bearings. This results in high friction between the oil seals and the shaft, causing additional power loss, and the sealing effect deteriorates over time. Utility Model Content

[0005] This application aims to solve the technical problems of waterproofing conventional external rotor motors, which require adding an outer shell to the motor and applying oil seals to the outer sides of the front and rear bearings. These methods suffer from high friction between the oil seals and the shaft, resulting in additional power loss, and the sealing effect deteriorates over time. The application provides a waterproof external rotor motor.

[0006] This application employs the following technical means to solve the technical problem:

[0007] An external rotor waterproof motor includes an aluminum alloy base, a stainless steel shaft, an external rotor, a stator, a potting sleeve, a ceramic bearing, and a circuit board;

[0008] The aluminum alloy base, stator, outer rotor, and stainless steel shaft are adapted to form a motor;

[0009] The glue-filling cylinder is disposed on the stator, and a potting compound is provided between the glue-filling cylinder and the stator;

[0010] The ceramic bearings are located on both sides of the stator, the stainless steel shaft passes through the two ceramic bearings and connects to the aluminum alloy base, and the circuit board is located on the aluminum alloy base.

[0011] Furthermore, the outer rotor includes an iron shell, a magnetic ring, and an aluminum alloy cover. The aluminum alloy cover is connected to the magnetic ring, the iron shell is located outside the magnetic ring, the magnetic ring has a space inside, and the stator is embedded in the magnetic ring.

[0012] Furthermore, the stator includes a wound stator, the aluminum alloy base has a protrusion in the middle, the protrusion passes through the middle of the circuit board and the wound stator, and a ceramic bearing is disposed in the protrusion, and the stainless steel shaft is inserted into the ceramic bearing.

[0013] Furthermore, it also includes a stainless steel retaining ring, which is disposed within the stator.

[0014] This application provides an external rotor waterproof motor with the following advantages: It comprises an aluminum alloy base, a stainless steel shaft, an external rotor, a stator, a potting sleeve, ceramic bearings, and a circuit board; the aluminum alloy base, stator, external rotor, and stainless steel shaft are adapted to form the motor; the potting sleeve is located on the stator, and potting compound is applied between the potting sleeve and the stator; the ceramic bearings are located on both sides of the stator, and the stainless steel shaft passes through the two ceramic bearings and connects to the aluminum alloy base; the circuit board is located on the aluminum alloy base. This solution addresses the technical problems of current general external rotor motor waterproofing methods, which require adding an outer shell to the motor and applying oil seals to the outer sides of the front and rear bearings. These methods suffer from high friction between the oil seals and the shaft, resulting in additional power loss, and a deterioration in sealing performance over time. Attached Figure Description

[0015] Figure 1 This is an exploded view of the overall structure of an embodiment of the waterproof external rotor motor of this application.

[0016] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that the terms "comprising," "including," and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses. Terms such as "first" and "second" in the claims, specification, and accompanying drawings of this application, as well as relational terms, are used merely to distinguish one entity / operation / object from another entity / operation / object, and do not necessarily require or imply any such actual relationship or order between these entities / operations / objects.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Reference Appendix Figure 1 This is an exploded view of the structure of an external rotor waterproof motor according to an embodiment of this application;

[0022] An external rotor waterproof motor includes an aluminum alloy base 1, a stainless steel shaft 7, an external rotor 12, a stator 11, a glue-filling cylinder 4, a ceramic bearing 10, and a circuit board 2.

[0023] The aluminum alloy base 1, stator 11, and outer rotor 12 are adapted to the stainless steel shaft 7 to form a motor;

[0024] The glue-filling cylinder 4 is disposed on the stator 11, and a potting compound is provided between the glue-filling cylinder 4 and the stator 11;

[0025] The ceramic bearings 10 are located on both sides of the stator 11. The stainless steel shaft 7 passes through the two ceramic bearings 10 and is connected to the aluminum alloy base 1. The circuit board 2 is located on the aluminum alloy base 1.

[0026] The outer rotor 12 includes an iron shell 5, a magnetic ring 6 and an aluminum alloy cover 8. The aluminum alloy cover 8 is connected to the magnetic ring 6. The iron shell 5 is located on the outside of the magnetic ring 6. The magnetic ring 6 has a space inside. The stator 11 is embedded in the magnetic ring 6.

[0027] The stator 11 includes a wound stator 3. The aluminum alloy base 1 has a protrusion in the middle. The protrusion passes through the middle of the circuit board 2 and the wound stator 3, and the ceramic bearing 10 is disposed in the protrusion. The stainless steel shaft 7 is inserted into the ceramic bearing 10.

[0028] It also includes a stainless steel retaining ring 9, which is disposed within the stator 11.

[0029] Specifically,

[0030] a. The wound stator 3 and the circuit board 2 are installed on the aluminum alloy base 1. The entire wound stator 3 is covered by the glue-filling tube 4 and tightly fitted to the aluminum alloy base 1. Glue is poured in from the opening on the top of the glue-filling tube 4. After the glue dries completely, the glue-filling tube 4 is removed. The glue-filling of the stator 11 is completed.

[0031] b. Stainless steel shaft 7 and stainless steel snap ring 9 are made of 304 or 316 stainless steel;

[0032] c. Use ceramic bearing 10;

[0033] d. The aluminum alloy base 1 and aluminum alloy cover 8 are made of aluminum alloy material with surface electrophoresis;

[0034] e. Electrophoresis on the surfaces of the iron shell 5 and the magnetic ring 6.

[0035] Most importantly, the winding stator and circuit board (if any) are completely encapsulated with epoxy resin using a new potting process to prevent water from coming into contact with live parts. Other components are made of stainless steel or surface electrophoresis, allowing the motor to be fully immersed in water and run without leakage or failure.

[0036] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external rotor waterproof motor, characterized by, Includes an aluminum alloy base, stainless steel shaft, outer rotor, stator, potting cylinder, ceramic bearing, and circuit board; The aluminum alloy base, stator, outer rotor, and stainless steel shaft are adapted to form a motor; The glue-filling cylinder is disposed on the stator, and a potting compound is provided between the glue-filling cylinder and the stator; The ceramic bearings are located on both sides of the stator, the stainless steel shaft passes through the two ceramic bearings and connects to the aluminum alloy base, and the circuit board is located on the aluminum alloy base.

2. The external rotor waterproof motor of claim 1, wherein, The outer rotor includes an iron shell, a magnetic ring, and an aluminum alloy cover. The aluminum alloy cover is connected to the magnetic ring, and the iron shell is located outside the magnetic ring. The magnetic ring has a space inside, and the stator is embedded in the magnetic ring.

3. The external rotor waterproof motor of claim 1, wherein, The stator includes a wound stator, and the aluminum alloy base has a protrusion in the middle. The protrusion passes through the middle of the circuit board and the wound stator, and a ceramic bearing is disposed in the protrusion. The stainless steel shaft is inserted into the ceramic bearing.

4. The external rotor waterproof motor of claim 1, wherein, It also includes a stainless steel retaining ring, which is disposed within the stator.

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