A self-moisture-proof carbon commutator

Abstract

The utility model relates to carbon commutator technical field provides a carbon commutator from dampproof, including carbon commutator main part, the inside of carbon commutator main part is provided with the sealed groove, the inside of carbon commutator main part is provided with the clamping slot, the inner side wall of sealed groove is provided with the limit hole, the inside of sealed groove is installed with sealing washer, the outer wall of sealing washer is fixedly connected with first clamping strip, the outer wall of sealing washer is fixedly connected with second clamping strip, the outer wall of sealing washer is fixedly connected with elastic lug. The utility model discloses through extruding sealing washer, makes it to be bent into oval shape, removes sealing washer, makes it to be put into the sealed groove that carbon commutator main part inside sets up, releases sealing washer, can make sealing washer restore and be clamped into sealed groove, plays the effect of promoting the connecting sealing property between carbon commutator main part and motor rotating shaft, prevents the water vapor from entering, under the clamping cooperation of first clamping strip and clamping slot, further promotes the dampproof effect of carbon commutator main part.

Description

Technical Field

[0001] This utility model relates to the field of carbon commutator technology, and in particular to a self-moisture-proof carbon commutator. Background Technology

[0002] A carbon commutator is a key component in an electric motor used to change the direction of current. In a DC motor, it ensures, through contact with the brushes, that the direction of current in the armature winding changes in a timely manner as the motor rotor rotates, thereby enabling the motor to generate continuous torque and achieve efficient conversion of electrical energy into mechanical energy. Carbon commutators possess excellent conductivity, wear resistance, and a low coefficient of friction, allowing for stable operation under high speed and high current conditions. Therefore, they are widely used in various DC motors, such as industrial motors, automotive motors, and power tools.

[0003] Existing carbon commutators often face various operating environments during use, with humidity being a significant influencing factor. When the ambient humidity is high, moisture in the air easily condenses into water droplets or forms a water film on the surface of the carbon commutator. This not only reduces the insulation performance of the carbon commutator, leading to electrical faults such as leakage and short circuits, but also accelerates the oxidation and corrosion of the carbon commutator surface, shortening its service life. Utility Model Content

[0004] The purpose of this invention is to provide a self-moisture-proof carbon commutator to solve the problem that existing carbon commutators are inconvenient to seal and prevent moisture at the connection with the motor shaft.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a self-moisture-proof carbon commutator, comprising a carbon commutator body;

[0006] The carbon commutator body has a sealing groove inside, a retaining groove inside, and a limit hole on the inner side wall of the sealing groove.

[0007] A sealing ring is installed inside the sealing groove. A first retaining strip is fixedly connected to the outer wall of the sealing ring. A second retaining strip is fixedly connected to the outer wall of the sealing ring. An elastic protrusion is fixedly connected to the outer wall of the sealing ring.

[0008] Preferably, the carbon commutator body is connected to the sealing ring by a sealing groove. The sealing ring is elastic, which allows it to be snapped into the sealing groove, thereby improving the sealing performance of the connection between the carbon commutator body and the motor shaft.

[0009] Preferably, the first locking bar is engaged with the carbon commutator body via a locking groove. The first locking bar and the second locking bar are symmetrically arranged around the central axis of the sealing ring, which allows the first locking bar to be locked into the locking groove for positioning.

[0010] Preferably, the elastic protrusion is engaged with the carbon commutator body through a limiting hole. The elastic protrusion is arranged in a ring around the central axis of the sealing ring. The elastic protrusion is hemispherical and is adapted to the limiting hole so that the elastic protrusion can be engaged into the limiting hole at the corresponding position for limiting.

[0011] Preferably, an epoxy resin coating is fixedly connected to the outer wall of the carbon commutator body, and a ceramic coating is fixedly connected to the outer wall of the epoxy resin coating.

[0012] Preferably, the carbon commutator body and the epoxy resin coating are tightly bonded together, and the carbon commutator body and the epoxy resin coating are arranged in parallel, which can block moisture from the carbon commutator body and improve the moisture-proof performance of the carbon commutator body.

[0013] Preferably, the epoxy resin coating and the ceramic coating are tightly bonded together, and the epoxy resin coating and the ceramic coating are arranged in parallel, which can improve the high temperature resistance of the carbon commutator body.

[0014] The self-moisture-proof carbon commutator provided by this utility model has the following advantages:

[0015] By using the carbon commutator body, sealing groove, slot, limiting hole, sealing ring, first locking strip and elastic protrusion, the sealing ring is squeezed and bent into an elliptical shape. The sealing ring is moved and placed into the sealing groove inside the carbon commutator body. Releasing the sealing ring allows it to return to its original position and lock into the sealing groove, thereby improving the sealing performance between the carbon commutator body and the motor shaft and preventing moisture from entering.

[0016] Furthermore, the interlocking action of the first clip and the slot can improve the stability of the sealing ring installation and further enhance the moisture-proof effect of the carbon commutator body.

[0017] Furthermore, the interlocking action of the elastic protrusion and the limiting hole can prevent the sealing ring from rotating relative to the carbon commutator body, further improving the moisture-proof performance of the carbon commutator body.

[0018] The carbon commutator body, epoxy resin coating, and ceramic coating are designed. The epoxy resin coating is fixedly connected to the outer wall of the carbon commutator body. When the epoxy resin coating is applied to the surface of the carbon commutator body, it forms a tough and dense protective film, which effectively prevents water vapor, oxygen, etc. from contacting the carbon commutator, and plays a role in moisture prevention and oxidation prevention. Due to the high hardness of the epoxy resin coating, it can resist a certain degree of wear and mechanical impact, enabling the carbon commutator body to be used in relatively harsh working environments and extending its service life.

[0019] Furthermore, a ceramic coating is fixedly connected to the outer wall of the epoxy resin coating. After the ceramic coating is applied to the surface of the carbon commutator body, a hard and smooth protective layer is formed, which is difficult for water vapor to penetrate and can withstand high temperature and mechanical stress. In addition, the ceramic coating also has good wear resistance and anti-arc erosion performance, which can improve the service life of the carbon commutator body, and is especially suitable for motors working in high load and high temperature environments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a perspective view of the main body of the carbon commutator of this utility model;

[0022] Figure 3 This is a perspective view of the sealing ring of this utility model;

[0023] Figure 4 This is a schematic diagram of the present invention;

[0024] Figure 5 This is a schematic diagram of the epoxy resin coating structure of this utility model.

[0025] The reference numerals in the figure are as follows: 1. Carbon commutator body; 2. Sealing groove; 3. Slot; 4. Limiting hole; 5. Sealing ring; 6. First retaining strip; 7. Second retaining strip; 8. Elastic protrusion; 9. Epoxy resin coating; 10. Ceramic coating. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1-5 The present invention provides a self-moisture-proof carbon commutator, comprising a carbon commutator body 1.

[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a sealing groove 2 and a retaining groove 3 are provided inside the carbon commutator body 1. A limiting hole 4 is provided on the inner side wall of the sealing groove 2. A sealing ring 5 is installed inside the sealing groove 2. A first retaining strip 6 and a second retaining strip 7 are fixedly connected to the outer wall of the sealing ring 5. An elastic protrusion 8 is fixedly connected to the outer wall of the sealing ring 5. The carbon commutator body 1 is engaged with the sealing ring 5 through the sealing groove 2. The sealing ring 5 is elastic. The first retaining strip 6 is engaged with the carbon commutator body 1 through the retaining groove 3. The first retaining strip 6 and the second retaining strip 7 are symmetrically arranged about the central axis of the sealing ring 5. The elastic protrusion 8 is engaged with the carbon commutator body 1 through the limiting hole 4. The elastic protrusion 8 is arranged in a ring around the central axis of the sealing ring 5. The elastic protrusion 8 is hemispherical and fits the limiting hole 4.

[0029] By squeezing the sealing ring 5, bending it into an elliptical shape, and moving the sealing ring 5, it is placed into the sealing groove 2 inside the carbon commutator body 1. Releasing the sealing ring 5 allows it to return to its original shape and be inserted into the sealing groove 2. This causes the first retaining strip 6, which is fixedly connected to one side of the sealing ring 5, to return to its original shape and be inserted into the retaining groove 3 for positioning. Meanwhile, the second retaining strip 7, which is fixedly connected to the other side of the sealing ring 5, is in contact with the outer wall of the carbon commutator body 1. At this time, under the pressure of the inner wall of the sealing groove 2, the elastic protrusion 8 is deformed and rotated. When the position of the elastic protrusion 8 is opposite to that of the limiting hole 4, the elastic protrusion 8 can return to its original shape and be inserted into the corresponding limiting hole 4. This allows the sealing ring 5 to be stably installed inside the carbon commutator body 1, preventing moisture from entering the interior through the gap between the carbon commutator body 1 and the motor shaft.

[0030] Reference Figure 2 and Figure 5 As shown, an epoxy resin coating 9 is fixedly connected to the outer wall of the carbon commutator body 1, and a ceramic coating 10 is fixedly connected to the outer wall of the epoxy resin coating 9. The carbon commutator body 1 and the epoxy resin coating 9 are tightly bonded together, and the carbon commutator body 1 and the epoxy resin coating 9 are arranged in parallel. The epoxy resin coating 9 and the ceramic coating 10 are tightly bonded together and arranged in parallel.

[0031] An epoxy resin coating 9 is fixedly connected to the outer wall of the carbon commutator body 1. Due to the excellent adhesion, corrosion resistance, and insulation properties of epoxy resin, after being coated on the surface of the carbon commutator body 1, it forms a tough and dense protective film, effectively preventing moisture and oxygen from contacting the carbon commutator, thus providing moisture protection and oxidation prevention. A ceramic coating 10 is fixedly connected to the outer wall of the epoxy resin coating 9. Because the ceramic coating 10 has extremely high hardness, high temperature resistance, and chemical stability, after being coated on the surface of the carbon commutator body 1, it forms a hard and smooth protective layer, making it difficult for moisture to penetrate and able to withstand high temperatures and mechanical stress.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-moisture-proof carbon commutator, comprising a carbon commutator body (1); Its features are: The carbon commutator body (1) has a sealing groove (2) inside, a slot (3) inside, and a limit hole (4) on the inner side wall of the sealing groove (2). A sealing ring (5) is installed inside the sealing groove (2). A first retaining strip (6) is fixedly connected to the outer wall of the sealing ring (5). A second retaining strip (7) is fixedly connected to the outer wall of the sealing ring (5). An elastic protrusion (8) is fixedly connected to the outer wall of the sealing ring (5).

2. The self-moisture-proof carbon commutator according to claim 1, characterized in that: The carbon commutator body (1) is engaged with the sealing ring (5) through the sealing groove (2), and the sealing ring (5) is elastically set.

3. The self-moisture-proof carbon commutator according to claim 1, characterized in that: The first locking strip (6) is engaged with the carbon commutator body (1) through the locking groove (3), and the first locking strip (6) and the second locking strip (7) are symmetrically arranged around the central axis of the sealing ring (5).

4. A self-moisture-proof carbon commutator according to claim 1, characterized in that: The elastic protrusion (8) is engaged with the carbon commutator body (1) through the limiting hole (4). The elastic protrusion (8) is arranged in a ring around the central axis of the sealing ring (5). The elastic protrusion (8) is hemispherical and is adapted to the limiting hole (4).

5. A self-moisture-proof carbon commutator according to claim 1, characterized in that: An epoxy resin coating (9) is fixedly connected to the outer wall of the carbon commutator body (1), and a ceramic coating (10) is fixedly connected to the outer wall of the epoxy resin coating (9).

6. A self-moisture-proof carbon commutator according to claim 5, characterized in that: The carbon commutator body (1) is tightly bonded to the epoxy resin coating (9), and the carbon commutator body (1) and the epoxy resin coating (9) are arranged in parallel.

7. A self-moisture-proof carbon commutator according to claim 5, characterized in that: The epoxy resin coating (9) and the ceramic coating (10) are tightly bonded together, and the epoxy resin coating (9) and the ceramic coating (10) are arranged in parallel.

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