A brush motor

Abstract

The utility model discloses a brush motor relates to motor design field, including motor shell and motor cover, and the rotor is rotationally fitted and installed in motor shell, the middle part of motor cover is shaped with carbon brush slot, and the bottom side of motor cover is provided with bottom cover, and carbon brush slot is set up with bottom cover covering, the bottom side of motor cover is shaped with four locating blocks, and the outside of bottom cover is shaped with four first air clearance groove, and locating block one one gap cooperation is installed in first air clearance groove, the middle part of bottom cover is shaped with first through -hole, and the middle part of motor shell upper end is shaped with second through -hole, and the rotor rotationally fitted and installed between first through -hole and second through -hole, the utility model discloses setting up carbon brush slot on motor cover, can adjust the assembly position of carbon brush through the mode of separately disassembling bottom cover after assembling, and then let motor contact bad failure can be quickly repaired and recovered, need not to open whole motor, convenient and fast, can also be convenient for the assembly production of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor design, and in particular to a brushed motor. Background Technology

[0002] A brushed motor is a rotating electric motor that converts electrical energy into mechanical energy (electric motor) or mechanical energy into electrical energy (generator) by containing brushes. Brushed motors are the foundation of all motors, characterized by fast starting, timely braking, smooth speed adjustment over a wide range, and relatively simple control circuitry.

[0003] Brushed motors on the market generally have a rotor installed inside the motor housing, and carbon brushes installed on the motor cover plate. The carbon brushes press against the commutator of the rotor to conduct electricity, thereby realizing the high-speed operation of the brushed motor. For example, a brushed motor is disclosed in an existing patent (publication number: CN111799957B, publication date: 2022.11.01), in which the brushes press against the commutator of the rotor through the brush arms.

[0004] However, after the housing and terminal block are installed, the brushes, brush arms, commutator, and other structures are all built into the motor and cannot be adjusted externally. As an elastic component, the brush arm is prone to deformation after the motor is hit or dropped, or after prolonged use. This makes it difficult for the brush to stably contact the commutator, potentially leading to poor contact. In this case, the entire terminal block needs to be disassembled to adjust the position of the carbon brush, which is very inconvenient. In addition, during the assembly of this type of brushed motor, the elasticity of the brush arm makes assembly difficult. Specifically, the two brushes tend to move closer together under the elastic force of the brush arm, making it difficult to leave space for the commutator. A specific assembly mechanism is needed to separate the brushes for assembly, which seriously affects production efficiency. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model provides a technical solution that can solve the above problems.

[0006] A brushed motor includes a motor housing and a motor cover plate, wherein a rotor is rotatably mounted inside the motor housing, and the motor cover plate covers the rotor inside the motor housing;

[0007] The motor cover plate has a carbon brush slot formed in the middle, and a bottom cover is provided on the bottom side of the motor cover plate, which covers the carbon brush slot.

[0008] The bottom side of the motor cover is formed with four positioning blocks, and the outer side of the bottom cover is formed with four first clearance grooves. The positioning blocks are installed in the first clearance grooves with a corresponding clearance fit.

[0009] The bottom cover has a first through hole formed in the middle, and the motor housing has a second through hole formed in the middle of the upper end. The rotor is rotatably mounted between the first and second through holes.

[0010] Furthermore: the positioning block is formed with insertion grooves, and a first conductive sheet is inserted and installed in the insertion grooves of the two diagonally opposite positioning blocks. A second conductive sheet and a metal spring are inserted and installed in the insertion grooves of the other two positioning blocks. The first conductive sheet and the second conductive sheet are electrically connected to each other.

[0011] Furthermore: a carbon brush body is fixedly installed at the inner end of the metal spring, and a commutator is fixedly installed on the rotor. The carbon brush body abuts against the commutator of the rotor through the metal spring.

[0012] Furthermore, both the upper and lower sides of the metal spring are bent into right-angled reinforcing edges.

[0013] Furthermore: the bottom cover covers the metal spring sheet, carbon brush body, and commutator inside the motor cover plate.

[0014] Furthermore, a filter capacitor is electrically connected between the first conductive sheet and the second conductive sheet.

[0015] Furthermore, the inner side of the motor cover plate has two capacitor slots, which are set one-to-one between two adjacent positioning blocks, and the filter capacitors are installed in the capacitor slots with a gap fit.

[0016] Furthermore: the inner end of the first conductive sheet is bent into a barb shape, and the outer end of the first conductive sheet extends out of the motor cover plate.

[0017] Furthermore, a copper wire winding is fixedly installed on the rotor, and the commutator and the copper wire winding are electrically connected to each other.

[0018] Furthermore: two permanent magnet rings are fixedly installed inside the motor housing, arranged diagonally between the two permanent magnet rings, and copper wire windings are arranged between the two permanent magnet rings.

[0019] Furthermore: the outer side of the upper end of the motor housing is formed with several limiting slots, and limiting protrusions are fixedly installed in the limiting slots, with the upper end of the permanent magnet ring abutting against the lower side of the limiting protrusions.

[0020] Furthermore, the bottom side of the motor housing is formed with four second clearance grooves, and the upper ends of the positioning blocks are installed in the second clearance grooves in a corresponding clearance fit.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. A carbon brush slot is made on the motor cover plate. After assembly, the assembly position of the carbon brush can be adjusted by removing the bottom cover separately. This allows for quick repair and restoration when the motor fails due to poor contact, without having to disassemble the entire motor, which is convenient and fast.

[0023] 2. When installing the motor cover, the carbon brush position can be moved by opening the bottom cover, which can achieve quick assembly between the motor cover and the motor housing without the need for special assembly tools, thus improving production efficiency and reducing assembly costs.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 yes Figure 1 A schematic diagram of the exploded structure;

[0028] Figure 3 yes Figure 2 A structural diagram from another perspective;

[0029] Figure 4 This is a structural schematic diagram from another perspective of the present invention;

[0030] Figure 5 yes Figure 4 This is a schematic diagram of the exploded structure;

[0031] Figure 6 This is a schematic diagram of the motor cover plate.

[0032] The figure shows: 1. Motor housing; 2. Motor cover plate; 3. Rotor; 4. Carbon brush slot; 5. Bottom cover; 6. Positioning block; 7. First clearance slot; 8. First through hole; 9. Second through hole; 10. Insertion slot; 11. First conductive sheet; 12. Second conductive sheet; 13. Metal spring; 14. Carbon brush body; 15. Commutator; 16. Right-angle reinforced edge; 17. Filter capacitor; 18. Capacitor slot; 19. Barb; 20. Copper wire winding; 21. Permanent magnet ring; 22. Limiting slot; 23. Limiting protrusion; 24. Second clearance slot; 25. Rolling bearing. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0034] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0035] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] like Figure 1-6As shown, a brushed motor of the present invention includes a motor housing 1 and a motor cover plate 2. A rotor 3 is rotatably mounted inside the motor housing 1, and the motor cover plate 2 covers the rotor 3 inside the motor housing 1.

[0039] The motor cover plate 2 has a carbon brush groove 4 formed in the middle, and a bottom cover 5 is provided on the bottom side of the motor cover plate 2, which covers the carbon brush groove 4.

[0040] The bottom side of the motor cover plate 2 is formed with four positioning blocks 6, and the outer side of the bottom cover 5 is formed with four first clearance grooves 7. The positioning blocks 6 are installed in the first clearance grooves 7 with a corresponding clearance fit.

[0041] The bottom cover 5 has a first through hole 8 formed in the middle, and the motor housing 1 has a second through hole 9 formed in the middle of the upper end. The rotor 3 is rotatably fitted between the first through hole 8 and the second through hole 9.

[0042] The principle is as follows: carbon brush slots 4 are made on the motor cover plate 2. After assembly, the assembly position of the carbon brushes can be adjusted by removing the bottom cover 5 separately. This allows for quick repair and restoration when the motor fails due to poor contact, without having to disassemble the entire motor. This is convenient and quick, and also speeds up the assembly efficiency of the motor.

[0043] Furthermore, rolling bearings 25 are fixedly installed in both the first through hole 8 and the second through hole 9. The upper and lower ends of the rotor 3 are respectively installed in the second through hole 9 and the first through hole 8 through the rolling bearings 25, making the rotation of the rotor 3 more stable and smooth.

[0044] Furthermore, the positioning block 6 is formed with insertion slots 10. First conductive pieces 11 are inserted and fitted into the insertion slots 10 of the two diagonally opposite positioning blocks 6. Second conductive pieces 12 and metal spring pieces 13 are inserted and fitted into the insertion slots 10 of the other two positioning blocks 6. The first conductive pieces 11 and the second conductive pieces 12 are electrically connected to each other. The positive and negative terminals can be connected to the metal spring pieces 13 through circuit connection to realize the power supply to the motor.

[0045] Furthermore: a carbon brush body 14 is fixedly installed on the inner end of the metal spring 13, and a commutator 15 is fixedly installed on the rotor 3. The carbon brush body 14 abuts against the commutator 15 of the rotor 3 through the metal spring 13; the positive and negative poles abut against the commutator 15 of the rotor 3 through the carbon brush body 14 on the metal spring 13, so as to realize the brushed power supply of the motor and ensure the stable operation of the motor.

[0046] Furthermore, the metal spring 13 has right-angled reinforcing edges 16 bent on both the upper and lower sides, making the metal spring 13 less prone to damage.

[0047] Furthermore: the bottom cover 5 covers the metal spring 13, carbon brush body 14, and commutator 15 inside the motor cover plate 2; the bottom cover 5 can be disassembled separately to adjust the position of the metal spring 13 and carbon brush body 14, so that the carbon brush body 14 can be quickly moved to abut against the commutator 15, realizing the rapid assembly and rapid maintenance of the motor.

[0048] Furthermore, a filter capacitor 17 is electrically connected between the first conductive sheet 11 and the second conductive sheet 12; the stable operation of the motor can be ensured by adding the filter capacitor 17.

[0049] Furthermore, the inner side of the motor cover plate 2 has two capacitor slots 18, which are arranged one-to-one between two adjacent positioning blocks 6. The filter capacitors 17 are installed in the capacitor slots 18 with a gap fit, making the installation of the filter capacitors 17 more stable.

[0050] Furthermore: the inner end of the first conductive sheet 11 is bent into a barb 19, and the outer end of the first conductive sheet 11 extends out of the motor cover plate 2; the barb 19 prevents the first conductive sheet 11 from coming off the motor cover plate 2, and the outer end of the first conductive sheet 11 extends out of the motor cover plate 2 as the positive and negative poles of the motor, which facilitates the connection and use of the motor.

[0051] Furthermore: a copper wire winding 20 is fixedly installed on the rotor 3, and the commutator 15 and the copper wire winding 20 are electrically connected to each other; when the commutator 15 supplies power to the copper wire winding 20, it can generate a magnetic field to realize the stable operation of the motor rotor 3.

[0052] Furthermore: two permanent magnet rings 21 are fixedly installed inside the motor housing 1, and the two permanent magnet rings 21 are arranged diagonally between each other. The copper wire winding 20 is set between the two permanent magnet rings 21. When the copper wire winding 20 is energized, the magnetic field will match the magnetic field of the permanent magnet rings 21, so as to realize the high-speed rotation of the motor rotor 3.

[0053] Furthermore, the outer side of the upper end of the motor housing 1 is formed with several limiting slots 22, and limiting protrusions 23 are fixedly installed in the limiting slots 22. The upper end of the permanent magnet ring 21 abuts against the lower side of the limiting protrusions 23; this can ensure the installation and limiting of the permanent magnet ring 21, thereby ensuring the stable operation of the rotor 3.

[0054] Furthermore, the bottom side of the motor housing 1 is formed with four second clearance grooves 24, and the upper end of the positioning block 6 is installed in the second clearance grooves 24 with corresponding clearance fit; making the installation between the motor housing 1 and the motor cover plate 2 more stable.

[0055] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A brushed motor, comprising a motor housing and a motor cover, wherein a rotor is rotatably mounted within the motor housing, and the motor cover covers the rotor within the motor housing; characterized in that: The motor cover plate has a carbon brush slot formed in the middle, and a bottom cover is provided on the bottom side of the motor cover plate, which covers the carbon brush slot. The bottom side of the motor cover plate has four positioning blocks, and the positioning blocks have insertion slots. The first conductive sheet is inserted and installed in the insertion slots of the two diagonally opposite positioning blocks. The second conductive sheet and the metal spring are inserted and installed in the insertion slots of the other two positioning blocks. The first conductive sheet and the second conductive sheet are electrically connected to each other. The carbon brush body is fixedly installed at the inner end of the metal spring. The commutator is fixedly installed on the rotor. The carbon brush body is pressed against the commutator of the rotor through the metal spring. The bottom cover covers the metal spring, carbon brush body, and commutator inside the motor cover plate.

2. A brushed motor according to claim 1, characterized in that: The bottom cover has a first through hole formed in the middle, and the motor housing has a second through hole formed in the middle of the upper end. The rotor is rotatably mounted between the first and second through holes.

3. A brushed motor according to claim 2, characterized in that: The outer side of the bottom cover is formed with four first clearance grooves, and the positioning blocks are installed in the first clearance grooves in a corresponding gap fit.

4. A brushed motor according to claim 1, characterized in that: A filter capacitor is electrically connected between the first conductive sheet and the second conductive sheet.

5. A brushed motor according to claim 4, characterized in that: The inner side of the motor cover plate has two capacitor slots, which are set one-to-one between two adjacent positioning blocks. The filter capacitors are installed in the capacitor slots with a gap fit.

6. A brushed motor according to claim 1, characterized in that: The inner end of the first conductive sheet is bent into a barb shape, and the outer end of the first conductive sheet extends out of the motor cover plate.

7. A brushed motor according to claim 1, characterized in that: A copper wire winding is fixedly installed on the rotor, and the commutator and the copper wire winding are electrically connected to each other.

8. A brushed motor according to claim 7, characterized in that: Two permanent magnet rings are fixedly installed inside the motor housing. The two permanent magnet rings are arranged diagonally between each other, and the copper wire winding is arranged between the two permanent magnet rings.

9. A brushed motor according to claim 8, characterized in that: The outer side of the upper end of the motor housing is formed with several limiting slots, and limiting protrusions are fixedly installed in the limiting slots. The upper end of the permanent magnet ring abuts against the lower side of the limiting protrusions.

10. A brushed motor according to claim 1, characterized in that: The metal spring sheet has right-angled reinforced edges on both the top and bottom sides.

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