Three-groove two-pole type brush motor

Abstract

The utility model discloses a three-groove two-pole type brush motor, which relates to the field of motor and motor design and comprises a motor shell, a rotor and a bottom cover. Two carbon brush assemblies are installed in the bottom cover. Each carbon brush assembly comprises an L-shaped conductive copper sheet, an L-shaped elastic sheet and a carbon brush body. The outer end of the L-shaped elastic sheet is fixedly mounted in the middle of the L-shaped conductive copper sheet, and a wire slot structure is formed between the upper end of the L-shaped conductive copper sheet and the L-shaped elastic sheet; two capacitors are fixedly installed in the bottom cover, one end of each capacitor is installed on the corresponding L-shaped conductive copper sheet in a winding mode through a wire groove, and the other end of each capacitor extends out of the bottom cover and is electrically connected to the motor shell. The carbon brush main body is fixedly arranged at the inner end of the L-shaped elastic sheet and is pressed on the rotor; compared with the prior art, the built-in capacitor is positioned by assembling the wire slot structure and the motor shell, the positioning structure is simple, the manufacturing cost is low, the stable installation of the capacitor can be ensured, and the problem of failure of the capacitor in case of vibration can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor, motor design field especially is related to a three slot two pole formula brush motor. BACKGROUND

[0002] Brush motor is the rotating electrical machine that contains brush device and converts electric energy into mechanical energy (motor) or converts mechanical energy into electric energy (generator). Brush motor is the basis of all motors, which has the characteristics of fast starting, timely braking, smooth speed regulation in a wide range, and relatively simple control circuit.

[0003] In order to improve the stability of brush motor during operation, a capacitor is connected at the two pole positions of the motor. In the prior art (publication number: CN221380636U, publication date: 2024.07.19), a low-noise brush motor and electric curtain are disclosed, which embeds the capacitor in the rear end cover of the motor. However, there is no fixed structure for the capacitor, and it is only installed by welding at both ends. After a long time of use, the capacitor may be damaged due to the vibration of the motor, so the capacitor may fail. In addition, after welding, the capacitor is difficult to disassemble. The prior art also has a motor that can stably fix the embedded capacitor, but the fixing structure is very complicated, which increases the manufacturing cost of the motor. Therefore, it is necessary to design a simple fixing structure to provide positioning for the embedded capacitor. UTILITY MODEL CONTENTS

[0004] The utility model overcomes the above-mentioned situation, and provides a technical scheme that can solve the above-mentioned problems.

[0005] A three slot two pole formula brush motor, comprising a motor housing, a rotor and a bottom cover, the rotor is rotatably installed between the motor housing and the bottom cover;

[0006] Two carbon brush assemblies are installed in the bottom cover, and the carbon brush assembly comprises an L-shaped conductive copper sheet, an L-shaped spring and a carbon brush body;

[0007] The L-shaped conductive copper sheet is in a right angle shape, two copper sheet insertion grooves are formed on the bottom cover, the L-shaped conductive copper sheet is inserted into the copper sheet insertion groove in a gap fit one-to-one, the inner end of the L-shaped conductive copper sheet is fixedly installed in the bottom cover, and the outer end of the L-shaped conductive copper sheet protrudes out of the copper sheet insertion groove;

[0008] The outer end of the L-shaped spring is fixedly installed in the middle part of the L-shaped conductive copper sheet, and the upper end of the L-shaped conductive copper sheet and the L-shaped spring form a wire slot structure;

[0009] Two capacitors are fixedly installed in the bottom cover, one end of the capacitor is wound and installed on the L-shaped conductive copper sheet through the wire slot structure, and the other end of the capacitor protrudes out of the bottom cover and is electrically connected to the motor housing;

[0010] The carbon brush body is fixedly installed at the inner end of the L-shaped elastic sheet, the carbon brush body at the inner end of the L-shaped elastic sheet is pressed on the rotor, two permanent magnet rings are fixedly installed in the motor shell, and the middle part of the rotor is arranged between the two permanent magnet rings.

[0011] Further, the carbon brush assembly further comprises a damping sheet, and the damping sheet is fixedly installed on the outer side wall of the L-shaped elastic sheet.

[0012] Further, the inner folding edge is integrally formed at the inner end of the L-shaped elastic sheet, and an obtuse angle is formed between the middle part of the L-shaped elastic sheet and the inner folding edge.

[0013] Further, the L-shaped elastic sheet is in the shape of an acute angle.

[0014] Further, the rotor comprises a rotating shaft, a three-groove wire holder and a commutator, the three-groove wire holder and the commutator are fixedly installed on the rotating shaft, the carbon brush body at the inner end of the L-shaped elastic sheet is pressed on the commutator of the rotor, the three-groove wire holder is arranged between the two permanent magnet rings, a copper wire winding is installed on the three-groove wire holder, and the copper wire winding is electrically connected to the commutator.

[0015] Further, the bearing is inlaidly installed at the middle part of the inner side of the bottom cover, and the lower end of the rotating shaft is fittedly installed at the inner ring of the bearing.

[0016] Further, the permanent magnet ring is in the shape of a circular arc, the thickness of the middle part of the permanent magnet ring is greater than the thickness of the two ends of the permanent magnet ring, and the two ends of the permanent magnet ring are formed with rounded corners.

[0017] Further, the two support seats are formed in the bottom cover, the blind hole is formed in the support seat, the through hole is formed in the upper end of the L-shaped conductive copper sheet, and the two positioning pins are further arranged in the bottom cover and pass through the through hole to lock the upper end of the L-shaped conductive copper sheet in the blind hole of the support seat.

[0018] Further, the two carbon brush assemblies are arranged in the bottom cover in a diagonal direction.

[0019] Further, the copper sheet insertion slot is arranged through the bottom cover, the insertion pin slot is formed in the middle position of the inner wall of the copper sheet insertion slot, and the insertion pin slot is located on the side wall of the L-shaped conductive copper sheet.

[0020] Compared with the prior art, the motor has the advantages that the capacitor is positioned by using the wire groove structure and the motor shell, the positioning structure is simple, the overall manufacturing cost of the motor is not increased, the stable installation of the capacitor can be ensured, and the capacitor will not fail when vibration occurs.

[0021] Additional aspects and advantages of the present application will be given in part in the following description, some of which will become apparent to those skilled in the art from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0023] Figure 1 is a structural schematic diagram of the present application;

[0024] Figure 2 is a structural schematic diagram of another view of the present application;

[0025] Figure 3 is an exploded structural schematic diagram of the present application;

[0026] Figure 4 is an exploded structural schematic diagram of another view of the present application;

[0027] Figure 5 is a mounting structural schematic diagram of the carbon brush assembly of the present application.

[0028] In the drawing: 1, motor housing; 2, rotor; 21, rotating shaft; 22, three-slot wire frame; 23, commutator; 3, bottom cover; 4, copper sheet slot; 5, wire slot structure; 6, capacitor; 7, permanent magnet ring; 8, shock absorbing sheet; 9, inner folding edge; 10, bearing; 11, rounded corner; 12, support seat; 13, blind hole; 14, through hole; 15, positioning pin; 16, pin slot; 17, carbon brush assembly; 171, L-shaped conductive copper sheet; 172, L-shaped spring sheet; 173, carbon brush main body. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely in combination with the drawings, obviously, the described embodiments are only some embodiments of the present application, not all the embodiments.

[0030] The components of the embodiments of the present application described and displayed in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0031] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] As shown in Figures 1-5 The utility model discloses a three -groove two -pole formula brush motor, including motor shell 1, rotor 2 and bottom cover 3, rotor 2 rotates and cooperates installation between motor shell 1 and bottom cover 3.

[0035] Two carbon brush assemblies 17 are installed in the bottom cover 3, and the carbon brush assembly 17 comprises an L-shaped conductive copper sheet 171, an L-shaped spring sheet 172 and a carbon brush body 173.

[0036] The L-shaped conductive copper sheet 171 is in a right angle shape, two copper sheet insertion grooves 4 are formed on the bottom cover 3, the L-shaped conductive copper sheet 171 is inserted into the copper sheet insertion groove 4 in a gap fit one-to-one, the inner end of the L-shaped conductive copper sheet 171 is fixedly installed in the bottom cover 3, and the outer end of the L-shaped conductive copper sheet 171 extends out of the copper sheet insertion groove 4.

[0037] The outer end of the L-shaped spring sheet 172 is fixedly installed in the middle part of the L-shaped conductive copper sheet 171, and the upper end of the L-shaped conductive copper sheet 171 and the L-shaped spring sheet 172 form a wire slot structure 5.

[0038] Two capacitors 6 are fixedly installed in the bottom cover 3, one end of the capacitor 6 is wound and installed on the L-shaped conductive copper sheet 171 through the wire slot structure 5, the other end of the capacitor 6 extends out of the bottom cover 3 and is electrically connected to the motor shell 1.

[0039] The carbon brush body 173 is fixedly installed at the inner end of the L-shaped elastic sheet 172, the carbon brush body 173 at the inner end of the L-shaped elastic sheet 172 is pressed on the rotor 2, two permanent magnet rings 7 are fixedly installed in the motor housing 1, and the middle part of the rotor 2 is arranged between the two permanent magnet rings 7;

[0040] The principle is that: the straight angle structure at the upper end of the L-shaped conductive copper sheet 171 and the L-shaped elastic sheet 172 form a wire slot structure 5, when the capacitor 6 is installed, the pin at one end of the capacitor 6 can be inserted into the wire slot structure 5, and then wound on the L-shaped conductive copper sheet 171, so that the stable installation of the capacitor 6 on the L-shaped conductive copper sheet 171 can be realized, and at the same time, the pin of the capacitor 6 forms a stable electrical connection with the L-shaped conductive copper sheet 171, and the problem of welding failure does not occur, and the pin at the other end of the capacitor 6 extends out of the bottom cover 3, after the motor housing 1 is installed, the pin of the capacitor 6 forms a stable electrical connection with the motor housing 1, and at the same time provides installation and positioning for the capacitor 6, so that welding can be avoided, the production efficiency is improved, in addition, the stability of the capacitor 6 is high, after the motor housing 1 is removed, the capacitor 6 can be removed together by removing the carbon brush assembly 17, so that the capacitor 6 is convenient to disassemble, the capacitor 6 is positioned by the wire slot structure 5 and the motor housing 1, the positioning structure is simple, the overall cost of the motor is not increased, and at the same time, the stable installation of the capacitor 6 can be ensured, and the problem of capacitor 6 failure does not occur when vibration occurs.

[0041] Further, the carbon brush assembly 17 further comprises a damping sheet 8, and the damping sheet 8 is fixedly installed on the outer side wall of the L-shaped elastic sheet 172; during motor operation, the carbon brush body 173 on the carbon brush assembly 17 is always pressed on the rotor 2 through the L-shaped elastic sheet 172, the setting of the damping sheet 8 can reduce the vibration amplitude of the carbon brush assembly 17 and the L-shaped elastic sheet 172, thereby ensuring the stable operation of the motor, and the noise during motor operation can be effectively reduced.

[0042] Further, the inner folding edge 9 is integrally formed at the inner end of the L-shaped elastic sheet 172, and the included angle between the middle part of the L-shaped elastic sheet 172 and the inner folding edge 9 is an obtuse angle; the L-shaped elastic sheet 172 is in the shape of an acute angle; the inner folding edge 9 and the acute angle structure are used to enable the L-shaped elastic sheet 172 to always elastically abut against the rotor 2, so that stable electrical connection is realized.

[0043] Further, the rotor 2 comprises a rotating shaft 21, a three-slot bobbin 22 and a commutator 23, the three-slot bobbin 22 and the commutator 23 are fixedly installed on the rotating shaft 21, the carbon brush main body 173 at the inner end of the L-shaped spring piece 172 is pressed on the commutator 23 of the rotor 2, the three-slot bobbin 22 is arranged between the two permanent magnet rings 7, the copper wire winding is arranged on the three-slot bobbin 22, and the copper wire winding is electrically connected to the commutator 23; after the copper wire winding is wound, the copper wire winding can be connected to electricity through the commutator 23, so that the three-slot bobbin 22 cooperates with the magnetic field of the two permanent magnet rings 7 to rotate at high speed, thereby ensuring the stable operation of the motor.

[0044] Further, the inner side of the bottom cover 3 is embedded with a bearing 10 at the middle part, and the lower end of the rotating shaft 21 is fitted to the inner ring of the bearing 10; the arrangement of the bearing 10 can make the rotation of the rotating shaft 21 more smooth, reduce the rotation resistance, and improve the stability of the motor during operation.

[0045] Further, the permanent magnet ring 7 is in a circular arc structure, the thickness of the middle part of the permanent magnet ring 7 is greater than the thickness of the two ends of the permanent magnet ring 7, and the two ends of the permanent magnet ring 7 are formed with rounded corners 11; the arrangement of the rounded corners 11 and the thickness of the permanent magnet ring 7 can ensure that the rotor 2 does not touch the permanent magnet ring 7 during operation of the motor, thereby ensuring the stable operation of the motor.

[0046] Further, two support seats 12 are formed in the bottom cover 3, a blind hole 13 is formed in the support seat 12, an upper end of the L-shaped conductive copper sheet 171 is formed with a through hole 14, and two positioning pins 15 are further arranged in the base, the positioning pins 15 pass through the through hole 14 to lock the upper end of the L-shaped conductive copper sheet 171 in the blind hole 13 of the support seat 12; the upper end of the L-shaped conductive copper sheet 171 can be fixed in the bottom cover 3 by inserting the positioning pin 15 into the through hole 14, realizing stable installation of the L-shaped conductive copper sheet 171, the positioning pin 15 can be selected as a screw, and the blind hole 13 can be selected as a threaded hole, realizing quick installation and disassembly.

[0047] Further, the two carbon brush assemblies 17 are arranged in the bottom cover 3 in a diagonal direction; stable brush commutation connection can be realized.

[0048] Further, the copper sheet insertion slot 4 is arranged through the bottom cover 3, an insertion pin slot 16 is formed in the middle position of the inner wall of the copper sheet insertion slot 4, and the insertion pin slot 16 is located on the side wall of the L-shaped conductive copper sheet 171; when the outer end of the L-shaped conductive copper sheet 171 is broken, the insertion pin can be inserted into the insertion pin slot 16, so that the insertion pin is abutted on the L-shaped conductive copper sheet 171 to realize electrical connection, thereby realizing emergency connection after the L-shaped conductive copper sheet 171 is broken, facilitating wiring use of the motor.

[0049] The embodiment is not limited in shape, material, structure, etc. of the utility model in any form, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model are within the protection scope of the technical scheme of the utility model.

Claims

1. A three-slot two-pole brush motor, comprising a motor housing (1), a rotor (2) and a bottom cover (3), the rotor (2) being rotatably fitted between the motor housing (1) and the bottom cover (3); characterized in that: two carbon brush assemblies (17) are installed in the bottom cover (3), the carbon brush assembly (17) comprising an L-shaped conductive copper sheet (171), an L-shaped spring sheet (172) and a carbon brush body (173); the outer end of the L-shaped spring sheet (172) is fixedly installed at the middle part of the L-shaped conductive copper sheet (171), and the upper end of the L-shaped conductive copper sheet (171) and the L-shaped spring sheet (172) form a wire slot structure (5); two capacitors (6) are fixedly installed in the bottom cover (3), one end of the capacitor (6) is wound on the L-shaped conductive copper sheet (171) through the wire slot structure (5), and the other end of the capacitor (6) extends out of the bottom cover (3) and is electrically connected to the motor housing (1); the carbon brush body (173) is fixedly installed at the inner end of the L-shaped spring sheet (172), and the carbon brush body (173) is pressed on the rotor (2).

2. A three-slot two-pole brush motor according to claim 1, characterized in that: The carbon brush assembly (17) further comprises a shock-absorbing sheet (8) fixedly installed on the outer side wall of the L-shaped spring sheet (172).

3. A three-slot two-pole brush motor according to any one of claims 1 or 2, characterized in that: The inner end of the L-shaped spring sheet (172) is integrally formed with an inner folded edge (9), and the included angle between the middle part of the L-shaped spring sheet (172) and the inner folded edge (9) is obtuse.

4. A three-slot two-pole brush motor according to claim 1, characterized in that: The L-shaped spring sheet (172) is in an acute angle shape.

5. A three-slot two-pole brush motor according to any one of claims 1 or 2 or 4, characterized in that: The rotor (2) comprises a rotating shaft (21), a three-slot wire holder (22) and a commutator (23), the three-slot wire holder (22) and the commutator (23) are fixedly installed on the rotating shaft (21), the carbon brush body (173) at the inner end of the L-shaped spring sheet (172) is pressed on the commutator (23) of the rotor (2) and completes the brush electrical connection, two permanent magnet rings (7) are fixedly installed in the motor housing (1), the three-slot wire holder (22) is arranged between the two permanent magnet rings (7), a copper wire winding is wound on the three-slot wire holder (22), and the copper wire winding is electrically connected to the commutator (23).

6. A three-slot two-pole brush motor according to claim 5, characterized in that: A bearing (10) is inlaidly installed at the middle part of the inner side of the bottom cover (3), and the lower end of the rotating shaft (21) is fitted at the inner ring of the bearing (10).

7. A three-slot two-pole brush motor according to any one of claims 5 or 6, characterized in that: The permanent magnet ring (7) is in a circular arc structure, the thickness of the middle part of the permanent magnet ring (7) is greater than the thickness of the two ends of the permanent magnet ring (7), and the two ends of the permanent magnet ring (7) are formed with rounded corners (11).

8. A three-slot two-pole brush motor according to claim 1, characterized in that: Two support seats (12) are formed in the bottom cover (3), a blind hole (13) is formed in the support seat (12), a through hole (14) is formed in the upper end of the L-shaped conductive copper sheet (171), and two positioning pins (15) are further arranged in the bottom cover (3), the positioning pins (15) pass through the through hole (14) to lock the upper end of the L-shaped conductive copper sheet (171) in the blind hole (13) of the support seat (12).

9. A three-slot two-pole brush motor according to claim 1, characterized in that: The two carbon brush assemblies (17) are diagonally arranged in the bottom cover (3).

10. A three-slot two-pole brush motor according to claim 1, characterized in that: Two copper sheet insertion grooves (4) are formed on the bottom cover (3), the copper sheet insertion grooves (4) are arranged through the bottom cover (3), the L-shaped conductive copper sheets (171) are correspondingly inserted and arranged in the copper sheet insertion grooves (4), and an insertion pin groove (16) is formed at the middle position of the inner wall of the copper sheet insertion groove (4) and is located on the side wall of the L-shaped conductive copper sheet (171).

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