An internal rotor waterproof motor

Abstract

This application provides an internal rotor waterproof motor, applicable to the field of motor equipment technology. It comprises a plastic housing, a pre-built stator, a wound stator, a stainless steel bushing, a rotor, a graphite bearing, a rubber cover, and a circuit board. Each of these components—plastic housing, pre-built stator, wound stator, and stainless steel bushing—has internal space. The pre-built stator is housed within the plastic housing, the wound stator within the pre-built stator, the stainless steel bushing within the wound stator, and the rotor within the stainless steel bushing. A bushing is located at one end of the rotor, and the graphite bearing is located at the other end. The rubber cover connects to the rotor, and the circuit board is compatible with the rubber cover. This solution addresses the current technical problems of waterproofing conventional internal rotor motors, whether brushed or brushless, AC or DC, which require oil seals on the outer sides of the front and rear bearings. These oil seals suffer from high friction between the seal and the shaft, resulting in additional power loss, and the sealing effect deteriorates over time.

Description

Technical Field

[0001] This application relates to the field of internal rotor waterproof motor technology, and particularly to an internal rotor waterproof 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 internal rotor motor requires oil seals on the outer side of the front and rear bearings. This method results in high friction between the oil seal 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 general internal rotor motors, whether brushed or brushless, AC or DC, which requires oil seals on the outside of the front and rear bearings of the motor. These problems include high friction between the oil seal and the shaft, resulting in additional power loss, and the sealing effect deteriorating over time. The application provides an internal rotor waterproof motor.

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

[0007] An internal rotor waterproof motor includes: a plastic housing, a finished stator, a wound stator, a stainless steel bushing, a rotor, a graphite bearing, a rubber cover, and a circuit board;

[0008] The plastic housing, the finished stator, the wound stator, and the stainless steel bushing all have internal spaces. The finished stator is located inside the plastic housing, the wound stator is located inside the finished stator, the stainless steel bushing is located inside the wound stator, the rotor is located inside the stainless steel bushing, one end of the rotor is provided with a bushing, the graphite bearing is located at the other end of the rotor, the rubber cover is connected to the rotor, and the circuit board is adapted to the rubber cover.

[0009] Furthermore, the rotor includes a bushing, a magnetic ring, a shaft, and potting compound;

[0010] The shaft is located inside the magnetic ring, and the two ends of the magnetic ring are respectively provided with bushings and graphite bearings. The potting compound is disposed between the shaft and the inner wall of the magnetic ring.

[0011] Furthermore, it also includes a potting compound, which is disposed between the plastic housing and the stainless steel bushing.

[0012] This application provides an internal rotor waterproof motor with the following advantages: It comprises a plastic housing, a pre-built stator, a wound stator, a stainless steel bushing, a rotor, a graphite bearing, a rubber cover, and a circuit board. Each of these components—the plastic housing, the pre-built stator, the wound stator, and the stainless steel bushing—has internal space. The pre-built stator is housed within the plastic housing, the wound stator within the pre-built stator, the stainless steel bushing within the wound stator, and the rotor within the stainless steel bushing. One end of the rotor has a bushing, and the graphite bearing is located at the other end of the rotor. The rubber cover is connected to the rotor, and the circuit board is compatible with the rubber cover. This solution addresses the current technical problems of waterproofing conventional internal rotor motors (whether brushed or brushless, AC or DC), which require oil seals on the outer sides of the front and rear bearings. These oil seals result in high friction between the seal and the shaft, causing additional power loss, and the sealing effect deteriorates over time. Attached Figure Description

[0013] Figure 1 This is an exploded view of the overall structure of an embodiment of the waterproof motor with an internal rotor according to this application.

[0014] 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

[0015] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Reference Appendix Figure 1 , is an exploded view of the internal rotor waterproof motor in one embodiment of this application;

[0020] An internal rotor waterproof motor includes: a plastic housing 1, a finished stator 6, a wound stator 4, a stainless steel bushing 2, a rotor, a graphite bearing 3, a rubber cover 11, and a circuit board 12.

[0021] The plastic housing 1, the finished stator 6, the wound stator 4, and the stainless steel bushing 2 all have internal spaces. The finished stator 6 is located inside the plastic housing 1, the wound stator 4 is located inside the finished stator 6, the stainless steel bushing 2 is located inside the wound stator 4, and the rotor is located inside the stainless steel bushing 2. One end of the rotor is provided with a bushing 7, and the graphite bearing 3 is located at the other end of the rotor. The rubber cover 11 is connected to the rotor, and the circuit board 12 is adapted to the rubber cover 11.

[0022] In this embodiment, the rotor includes a bushing 7, a magnetic ring 8, a shaft 10, and potting compound 5;

[0023] The shaft 10 is located inside the magnetic ring 8. The two ends of the magnetic ring 8 are respectively provided with a bushing 7 and a graphite bearing 3. The potting compound 5 is located between the shaft 10 and the inner sidewall of the magnetic ring 8.

[0024] In this embodiment, a potting compound 5 is also included, which is disposed between the plastic housing 1 and the stainless steel bushing 2.

[0025] Specifically,

[0026] Stator section: A stainless steel bushing 2 is installed inside the plastic housing 1. The stainless steel bushing 2 and the inner side wall of the outer circle of the plastic housing 1 form a cavity. The winding stator 4 is installed in this cavity of the plastic housing 1. Then, the glue cover 11 and the circuit board 12 are installed. The inner side of the glue cover 11 is tightly fitted with the stainless steel bushing 2 to prevent glue from seeping in. The outer side of the glue cover 11 is extended so that the opening is higher than the end face of the plastic housing. Glue is poured in from the opening to completely submerge the stator and the circuit board 12. After the glue dries, the potting is completed, and the potting glue 5 shown in the figure is formed.

[0027] Rotor section: The length of the magnetic ring 8 is longer than that of the shaft 10. Apply glue to the recess formed between the shaft 10 and the magnetic ring 8 to complete the rotor glue filling.

[0028] c. The rotor shaft and bushing are made of 304 or 316 stainless steel;

[0029] d. Use graphite bearings 3;

[0030] e. Electrophoresis on the surface of magnetic ring 8;

[0031] f. The plastic outer shell and rubber cap 11 are made of engineering plastics.

[0032] 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 inner rotor waterproof motor, characterized by, include: Plastic housing, finished stator, wound stator, stainless steel bushing, rotor, graphite bearing, rubber cover and circuit board; The plastic housing, the finished stator, the wound stator, and the stainless steel bushing all have internal spaces. The finished stator is located inside the plastic housing, the wound stator is located inside the finished stator, the stainless steel bushing is located inside the wound stator, the rotor is located inside the stainless steel bushing, one end of the rotor is provided with a bushing, the graphite bearing is located at the other end of the rotor, the rubber cover is connected to the rotor, and the circuit board is adapted to the rubber cover.

2. The internal rotor waterproof motor of claim 1, wherein, The rotor includes a bushing, a magnetic ring, a shaft, and potting compound; The shaft is located inside the magnetic ring, and the two ends of the magnetic ring are respectively provided with bushings and graphite bearings. The potting compound is disposed between the shaft and the inner wall of the magnetic ring.

3. The waterproof internal rotor motor according to claim 1, characterized in that, It also includes a potting compound, which is disposed between the plastic housing and the stainless steel bushing.

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