Commutator with unilateral reinforced structure

Abstract

The utility model discloses a commutator with a unilateral reinforced structure, which comprises commutator segments, one side of each commutator segment is fixedly connected with a connecting sheet, the end part of each connecting sheet is connected with a limiting block, the end part of each connecting sheet is fixedly connected with a positioning seat at the position on one side of each limiting block, and plastic cylinders are filled among the commutator segments. According to the commutator with the single-side reinforced structure, through cooperative use of the positioning seat, the forming groove, the pressing ring, the injection molding hole, the injection molding pipe and the discharging hole, liquid plastic enters the injection molding pipe through the injection molding hole and enters the forming groove through the discharging hole, and when the plastic barrel is solidified and formed, the injection molding pipe and the liquid plastic in the forming groove are connected into a whole at the moment; and the diameter of the forming groove is large, so that the plastic solidified in the forming groove and the injection molding pipe is difficult to pull out so as to firmly lock the connection between the compression ring and the commutator segment, thereby avoiding the phenomenon that the commutator segment flies due to the falling of the compression ring, and greatly improving the use stability and reliability of the product.

Description

A single-sided reinforced commutator Technical Field

[0001] This utility model relates to the field of commutator technology, specifically a commutator with a single-sided reinforced structure. Background Technology

[0002] The commutator is a core component of DC motors and general-purpose motors. Its core function is to automatically switch the direction of current in the armature windings during rotor rotation, thereby ensuring that the motor continuously generates unidirectional torque and achieves stable operation. It is essentially a mechanical current direction switching switch.

[0003] A search revealed that the prior art, including utility model CN216794196U, discloses a single-sided reinforced commutator, comprising commutator segments evenly spaced around the circumference, with grooves at both ends of each segment; a non-metallic reinforcing ring disposed within one groove of each commutator segment; a non-metallic washer disposed within the groove of the other end of each commutator segment; an iron ring disposed on one side of the non-metallic washer, with its axial inner end abutting against the non-metallic washer, and the iron ring not contacting the commutator segments; and bakelite powder filling the space between the commutator segments, the non-metallic reinforcing ring, the non-metallic washer, and the iron ring. This utility model has a simple structure. The single-sided composite reinforcement structure, with the non-metallic washer supporting the iron ring, effectively separates the iron ring from the commutator segments, achieving insulation and improving product performance.

[0004] And a single-reinforced ring commutator for an automotive starter motor with announcement number CN214673376U.

[0005] The above technical solutions improve the performance and effectiveness of the commutator through different methods, but they still have the following shortcomings. The above methods only connect the commutator segments and the pressure ring by snap-fit ​​or by a small amount of hot-melt plastic, which has poor firmness and the pressure ring has a certain risk of falling off, which may cause the commutator to fall apart during high-speed rotation. Therefore, we propose a commutator with a single-sided reinforcement structure to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a single-sided reinforced commutator to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A single-sided reinforced commutator includes commutator segments, a connecting piece fixedly connected to one side of the commutator segments, a limit block connected to the end of the connecting piece, a positioning seat fixedly connected to the end of the connecting piece and located on one side of the limit block, a plastic tube filling between several commutator segments, and an insulating ring movably connected to the ends of several connecting pieces and located on one side of the limit block.

[0009] As a further embodiment of this utility model, the end of the insulating ring is provided with a snap-fit ​​groove, and a pressure ring is movably connected inside the snap-fit ​​groove. The top of the pressure ring is provided with a plurality of evenly distributed injection holes, and an injection tube is installed inside the pressure ring and below the injection holes.

[0010] As a further embodiment of this utility model, the outer wall of the injection tube is provided with a discharge hole, and the interior of the positioning seat is provided with a molding groove.

[0011] As a further embodiment of this utility model, a mica sheet is installed between the two commutator segments, and several anti-slip patterns are distributed on the sidewalls of both the commutator segments and the mica sheet.

[0012] As a further improvement of this utility model, the inner wall of the forming groove is provided with several anti-detachment grooves.

[0013] As a further improvement of this utility model, the connecting piece has several connecting holes that extend through its interior.

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

[0015] 1. This single-sided reinforced commutator, through the coordinated use of a positioning seat, molding groove, pressure ring, injection hole, injection tube, and discharge hole, allows liquid plastic to enter the injection tube through the injection hole and the molding groove through the discharge hole. When the plastic tube solidifies, the liquid plastic in the injection tube and the molding groove become one. Due to the large diameter of the molding groove, the solidified plastic in the molding groove and the injection tube is difficult to pull out, thus firmly locking the connection between the pressure ring and the commutator segment. This prevents the commutator segment from flying off due to the pressure ring falling off, greatly improving the stability and reliability of the product.

[0016] 2. This single-sided reinforced commutator, through the cooperation of the positioning seat and the injection molding tube, can limit the commutator segments, prevent the commutator segments from tilting, and ensure that several commutator segments can always be arranged in an orderly manner, so as to reduce the impact of centrifugal force on the operation of the commutator, and at the same time prevent the pressure ring from being deformed by the commutator segments. Attached Figure Description

[0017] Figure 1 is a schematic diagram of a single-sided reinforced commutator.

[0018] Figure 2 is a structural breakdown diagram of a single-sided reinforced commutator.

[0019] Figure 3 is a schematic diagram of the commutator segment structure in a single-sided reinforced commutator.

[0020] Figure 4 is a schematic diagram of the hoop structure in a single-sided reinforced commutator.

[0021] Figure 5 is a schematic diagram of the positioning seat structure in a single-sided reinforced commutator.

[0022] In the diagram: 1. Commutator segment; 2. Mica sheet; 3. Plastic cylinder; 4. Connecting piece; 5. Insulating ring; 6. Connecting hole; 7. Limiting block; 8. Positioning seat; 9. Molding groove; 10. Anti-detachment groove; 11. Pressure ring; 12. Injection hole; 13. Injection tube; 14. Discharge hole; 15. Snap-fit ​​groove; 16. Anti-slip texture. Detailed Implementation

[0023] 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.

[0024] Example:

[0025] Please refer to Figures 1-5. This utility model provides a technical solution for a commutator with a single-sided reinforced structure: it includes a commutator segment 1, a connecting piece 4 fixedly connected to one side of the commutator segment 1, a limiting block 7 connected to the end of the connecting piece 4, a positioning seat 8 fixedly connected to the end of the connecting piece 4 and located on one side of the limiting block 7, a plastic tube 3 filling between several commutator segments 1, and an insulating ring 5 that serves as insulation is movably connected to the ends of several connecting pieces 4 and located on one side of the limiting block 7.

[0026] The end of the insulating ring 5 is provided with a snap-fit ​​groove 15. The snap-fit ​​groove 15 is movably connected to a pressure ring 11 for fixing a number of commutator segments 1. The top of the pressure ring 11 is provided with a number of evenly distributed injection holes 12. An injection tube 13 is installed inside the pressure ring 11 and below the injection holes 12.

[0027] The outer wall of the injection tube 13 is provided with a discharge hole 14, and the inside of the positioning seat 8 is provided with a molding groove 9. The injection tube 13 is movably connected to the positioning seat 8, and the diameter of the molding groove 9 is larger than the diameter of the injection tube 13.

[0028] A mica sheet 2, which serves as an insulator, is installed between the two commutator segments 1. Several anti-slip grooves 16 are distributed on the sidewalls of both the commutator segment 1 and the mica sheet 2.

[0029] Specifically, the anti-slip texture 16 can increase the friction between the commutator segment 1 and the mica sheet 2, thereby ensuring that the mica sheet 2 is always between the two commutator segments 1, and preventing the two commutator segments 1 from contacting and forming a short circuit due to the mica sheet 2 falling off or tilting, so as to improve the stability of use.

[0030] The inner wall of the forming groove 9 is provided with several anti-detachment grooves 10.

[0031] The connecting piece 4 has several connecting holes 6 that extend through its interior.

[0032] Specifically, after the liquefied plastic cylinder 3 enters between several commutator segments 1, the opening of the connecting hole 6 allows the liquefied plastic cylinder 3 to flow within the connecting hole 6. When the plastic cylinder 3 is formed, it can connect several commutator segments 1 in series, further improving the product's robustness.

[0033] The working principle of this utility model is as follows:

[0034] After the commutator segment 1 and mica sheet 2 are arranged, the insulating ring 5 is first snapped onto the top of several connecting pieces 4 and limited by the limiting block 7. As shown in Figure 4, several through holes are opened at the bottom of the insulating ring 5. When the insulating ring 5 and the connecting piece 4 are snapped together, the positioning seat 8 installed at the end of the connecting piece 4 is located in the through hole opened at the end of the insulating ring 5. At this time, the pressure ring 11 is snapped into the inside of the snapping groove 15 to fix the position of the commutator segment 1. At this time, the injection tube 13 and the positioning seat 8 are connected one by one. After the installation is completed, the plastic cylinder 3 is connected to several commutator segments 1 by casting to further improve the connection firmness between several commutator segments 1.

[0035] During casting, the plastic cylinder 3 enters the injection tube 13 through the injection hole 12 and the molding tank 9 through the discharge hole 14. When the plastic cylinder 3 solidifies, the liquid plastic in the injection tube 13 and the molding tank 9 will be connected as one. Since the diameter of the molding tank 9 is large, the solidified plastic in the molding tank 9 and the injection tube 13 is difficult to pull out, so as to firmly lock the connection between the pressure ring 11 and the commutator segment 1, and prevent the commutator segment 1 from flying off due to the pressure ring 11 falling off. This greatly improves the stability and reliability of the product. In addition, the positioning seat 8 and the injection tube 13 can limit the commutator segment 1, prevent the commutator segment 1 from tilting, and ensure that several commutator segments 1 can always be arranged in an orderly manner, so as to reduce the impact of centrifugal force on the operation of the commutator. At the same time, it can prevent the pressure ring 11 from being deformed by the commutator segment 1.

[0036] The anti-detachment groove 10 can increase the adhesion between the plastic cylinder 3 and the positioning seat 8, so as to further prevent the pressure ring 11 from falling off;

[0037] As shown in Figures 1 and 3, the edge of the commutator segment 1 opposite to the connecting segment 4 is arc-shaped. This design can reduce the friction of the carbon brush when it contacts the edge of the commutator segment 1, thereby reducing the wear of the carbon brush, reducing the frequency of carbon brush replacement, and making it more convenient to use.

[0038] 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 single-sided reinforced commutator, comprising a commutator segment (1), characterized in that: A connecting piece (4) is fixedly connected to one side of the commutator segment (1). A limit block (7) is connected to the end of the connecting piece (4). A positioning seat (8) is fixedly connected to the end of the connecting piece (4) and to one side of the limit block (7). A plastic tube (3) is filled between several commutator segments (1). An insulating ring (5) is movably connected to the ends of several connecting pieces (4) and to one side of the limit block (7).

2. The commutator with a single-sided reinforced structure according to claim 1, characterized in that: The insulating ring (5) has a snap-fit ​​groove (15) at its end. A pressure ring (11) is movably connected inside the snap-fit ​​groove (15). The top of the pressure ring (11) has several evenly distributed injection holes (12). An injection tube (13) is installed inside the pressure ring (11) and below the injection holes (12).

3. A commutator with a single-sided reinforced structure according to claim 2, characterized in that: The outer wall of the injection tube (13) is provided with a discharge hole (14), and the interior of the positioning seat (8) is provided with a molding groove (9).

4. A commutator with a single-sided reinforced structure according to claim 1, characterized in that: A mica sheet (2) is installed between the two commutator segments (1), and several anti-slip patterns (16) are distributed on the sidewalls of both the commutator segment (1) and the mica sheet (2).

5. A commutator with a single-sided reinforced structure according to claim 3, characterized in that: The inner wall of the forming groove (9) is provided with several anti-detachment grooves (10).

6. A commutator with a single-sided reinforced structure according to claim 1, characterized in that: The connecting piece (4) has several connecting holes (6) that are opened through its interior.

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