Six-groove magnetizing type 90-degree brush motor with built-in capacitor

Abstract

The invention discloses a six-groove magnetizing type 90-degree built-in capacitor brush motor, which relates to the field of motor design and comprises a motor bottom cover, a rotor and a motor shell. Two carbon brush installation positions are formed on the inner side of the motor bottom cover, motor carbon brushes are fixedly installed in the carbon brush installation positions, a commutator is fixedly installed on the rotor, and the motor carbon brushes abut against the outer side of the commutator to achieve electrical connection. A slot is formed between the carbon brush mounting position and the motor bottom cover, a capacitor is mounted in the slot in a clearance fit manner, the inner end of the capacitor is electrically connected to the motor carbon brush, and the outer end of the capacitor extends out of the motor bottom cover and is electrically connected to the motor shell; a magnetizing ring is fixedly arranged in the motor shell, the magnetizing ring is divided into a plurality of magnetic poles after being magnetized, and S poles and N poles in the magnetic poles are arranged in a staggered manner; according to the invention, the assembly of the brush motor can be facilitated, the rotation precision and stability of the rotor of the brush motor can be improved, the capacitor can be rapidly replaced, and the noise of the brush motor during working can be reduced.

Description

Technical Field

[0001] The invention relates to the field of motor design, and in particular to a six-slot magnetizing 90° brushed motor with built-in capacitors. Background Art

[0002] A brushed motor is a rotating motor that contains a brush device and converts electrical energy into mechanical energy (motor) or mechanical energy into electrical energy (generator). Brushed motors are the basis of all motors. They have the characteristics of fast starting, timely braking, smooth speed regulation over a wide range, and relatively simple control circuits.

[0003] The brushed motors on the market are all fixed in the motor housing with permanent magnet rings. A common method is to set up two symmetrical permanent magnet rings, which are arranged on both sides of the motor housing. The motor set up in this way has only two magnetic poles, and the rotation angle of the motor is difficult to accurately control.

[0004] If multiple magnetic poles are set, the number of permanent magnet rings needs to be increased accordingly. Due to the limited internal space of the motor casing and the mutual attraction or repulsion between the permanent magnet rings, the permanent magnet rings are difficult to install. Therefore, it is necessary to design a new magnetization method.

[0005] When assembling a brushed motor, the carbon brushes in existing brushed motors are installed in a diagonal correction manner against the commutator of the rotor. This diagonal arrangement makes assembly difficult. At the same time, when the rotor rotates at high speed, the carbon brushes will continuously rub against the commutator, causing vibration at the carbon brush position, which will bring certain noise. Moreover, the vibration can easily cause the carbon brush to fail or be damaged, seriously affecting the service life of the brushed motor.

[0006] Existing brushed motors are equipped with built-in capacitors to ensure stable operation of the motors. However, the method of fixing the capacitors is relatively complicated, or the capacitors are not fixed firmly, resulting in capacitor failure. In order to ensure the stable installation of the capacitors, the prior art directly uses welding to connect them. This installation method makes the capacitors difficult to disassemble, which is very inconvenient when the capacitors need to be replaced.

[0007] The present invention is aimed at improving the defects of the brushless motor in the prior art. Summary of the invention

[0008] In order to overcome the above-mentioned shortcomings, the present invention provides a technical solution that can solve the above-mentioned problems.

[0009] A six-slot magnetized 90° built-in capacitor brushed motor, comprising a motor bottom cover, a rotor and a motor housing, wherein the rotor is rotatably mounted between the motor bottom cover and the motor housing; The inner side of the motor bottom cover is formed with two carbon brush installation positions, the angle between the two carbon brush installation positions is 90°, the motor carbon brushes are fixedly installed in the carbon brush installation positions, the commutator is fixedly installed on the rotor, and the motor carbon brushes are against the outer side of the commutator to achieve electrical connection; A slot is formed between the carbon brush installation position and the motor bottom cover, a capacitor is installed in the slot with clearance fit, the inner end of the capacitor is electrically connected to the motor carbon brush, the bottom side edge of the motor housing is assembled and installed on the motor bottom cover, and the outer end of the capacitor extends out of the motor bottom cover and is electrically connected to the motor housing; A magnetizing ring is fixedly installed in the motor housing. After magnetization, the magnetizing ring is divided into a plurality of magnetic poles, including S poles and N poles, and the S poles and N poles are arranged alternately. The middle gap of the rotor is installed in the magnetizing ring.

[0010] Furthermore: a six-slot bobbin is fixedly installed on the rotor, a copper wire winding is wound inside the six-slot bobbin, the end of the copper wire winding is electrically connected to the commutator, the six-slot bobbin of the rotor is installed in the magnetizing ring with a gap fit, and the magnetic poles include two S poles and two N poles, and the two S poles and the two N poles are arranged alternately.

[0011] Furthermore: the outer circumference of the six-slot wire rack is formed with six wire slots, the six wire slots are arranged in a circular array with each other, and the copper wire windings are wound and installed in the six wire slots.

[0012] Further: the motor carbon brush includes a conductive copper sheet, a conductive spring, a carbon brush body and a shock-absorbing sheet. The conductive copper sheet is plugged into the slot, the conductive spring is fixedly installed on the inner end of the conductive copper sheet, the carbon brush body is fixedly installed on the other end of the conductive spring, the elasticity of the conductive spring itself drives the carbon brush body to press against the outside of the commutator, and the shock-absorbing sheet is fixedly installed on the outer wall of the conductive spring.

[0013] Optionally: the shock absorbing plate adopts a damping strip.

[0014] Furthermore: a plurality of reinforcing ribs are integrally formed in the bottom cover of the motor, the conductive spring sheet is arranged on the inner side of the reinforcing rib, and the shock absorbing sheet is installed on the side of the conductive spring sheet close to the reinforcing rib.

[0015] Further: the outer end of the conductive copper sheet extends out of the slot, the outer end of the conductive copper sheet is bent to form a flange, the flange is folded and attached to the bottom side of the motor bottom cover, and the end of the flange extends out of the motor bottom cover, and one end of the flange extending out of the motor bottom cover is formed with a welding hole.

[0016] Furthermore: the angle between the two conductive spring sheets is an acute angle.

[0017] Further: the inner end of the conductive copper sheet is formed with a right-angle fold, a hole is formed on the right-angle fold, the motor bottom cover is formed with a support block on the side of the slot, an installation blind hole is formed on the support block, and a positioning pin is fixedly installed between the hole and the installation blind hole.

[0018] Optionally, the installation blind hole is a threaded hole, the positioning pin is a screw, and the screw is installed and locked in the threaded hole by spiral fit.

[0019] Further: the motor bottom cover is formed with two slots, and the outer side of the motor bottom cover is formed with two recessed slots, and the slots are located on the sides of the recessed slots; The outer end of the capacitor extends out of the motor bottom cover through the slot and is installed in the recessed groove with clearance fit. After the motor housing is assembled, the outer end of the capacitor is tightly installed between the recessed groove and the inner wall of the motor housing.

[0020] Further: a stepped groove is formed on the outer side of the motor bottom cover, the bottom side edge of the motor housing is assembled in the stepped groove, the recessed groove is integrally formed in the stepped groove, a positioning block is formed in the stepped groove, a notch is formed on the bottom side edge of the motor housing, and the positioning block is installed in the notch with a clearance fit.

[0021] Furthermore: a bearing groove is formed in the middle of the motor bottom cover, a ball bearing is fixedly installed in the bearing groove, and the inner ring of the ball bearing is tightly installed on the rotor by adjusting the tolerance.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. Arrange multiple magnetic poles in the magnetizing ring by magnetizing, and make the S poles and N poles in the magnetic poles staggered and separated from each other, so as to form a multi-pole magnetic field in the motor housing. When the rotor rotates, the commutator can be used to connect the wires between the motor carbon brushes to achieve high-speed rotation; 2. The two motor carbon brushes are fixed in the motor bottom cover at 90°. The rotor can be directly installed into the motor bottom cover from one side to form a stable brush connection, thereby speeding up the motor assembly efficiency while ensuring the motor quality. 3. A capacitor is installed. The setting of the capacitor can enhance the stability of the motor during operation, thereby ensuring the service life of the motor. At the same time, the inner end of the capacitor is directly connected to the carbon brush of the motor, and the outer end of the capacitor is pressed on the inner wall of the motor housing through the motor housing assembly method, thereby completing the stable assembly of the capacitor. After the motor is assembled, the capacitor will not fall off, and the capacitor can be quickly replaced during disassembly, which is convenient for use; 4. A shock-absorbing plate is installed on the motor carbon brush to reduce the vibration caused by high-speed friction, so that the motor carbon brush can be stably against the outside of the commutator, thereby improving the rotation accuracy of the motor and reducing the noise generated by the brush motor when it is working.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of another perspective of the present invention; Figure 3 It is a schematic diagram of the explosion structure of the present invention; Figure 4 It is a schematic diagram of the explosion structure of another viewing angle of the present invention; Figure 5 It is a schematic diagram of the structure of the magnetic poles in the magnetizing ring; Figure 6 yes Figure 5 Schematic diagram of the structure after magnetization.

[0026] As shown in the figure: 1. Motor bottom cover; 2. Rotor; 3. Motor housing; 4. Carbon brush installation position; 5. Motor carbon brush; 51. Conductive copper sheet; 52. Conductive spring; 53. Carbon brush body; 54. Shock absorber; 6. Commutator; 7. Slot position; 8. Capacitor; 9. Magnetizing ring; 10. Magnetic pole; 101. S pole; 102. N pole; 11. Six-slot wire rack; 12. Copper wire winding; 13. Reinforcement rib; 14. Flanging; 15. Welding hole; 16. Right-angle folding edge; 17. Hole position; 18. Support block; 19. Installation blind hole; 20. Positioning pin; 21. Slot; 22. Recessed groove; 23. Step groove; 24. Positioning block; 25. Notch; 26. Bearing groove; 27. Ball bearing; 28. Wire groove. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various 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 represents selected embodiments of the present invention.

[0029] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1-6 As shown, a six-slot magnetized 90° brushed motor with built-in capacitor 8 of the present invention comprises a motor bottom cover 1, a rotor 2 and a motor housing 3, wherein the rotor 2 is rotatably mounted between the motor bottom cover 1 and the motor housing 3; The inner side of the motor bottom cover 1 is formed with two carbon brush mounting positions 4, the angle between the two carbon brush mounting positions 4 is 90°, the carbon brushes 5 of the motor are fixedly mounted in the carbon brush mounting positions 4, the commutator 6 is fixedly mounted on the rotor 2, and the carbon brushes 5 of the motor are against the outer side of the commutator 6 to realize electrical connection; A slot 7 is formed between the carbon brush installation position 4 and the motor bottom cover 1, and a capacitor 8 is installed in the slot 7 with clearance fit, and the inner end of the capacitor 8 is electrically connected to the motor carbon brush 5. The bottom side edge of the motor housing 3 is assembled and installed on the motor bottom cover 1, and the outer end of the capacitor 8 extends out of the motor bottom cover 1 and is electrically connected to the motor housing 3; A magnetizing ring 9 is fixedly installed in the motor housing 3. After magnetization, the magnetizing ring 9 is divided into a plurality of magnetic poles 10. The magnetic poles 10 include an S pole 101 and an N pole 102. The S poles 101 and the N poles 102 are arranged alternately. The middle part of the rotor 2 is installed in the magnetizing ring 9 with a gap fit. The principle is as follows: a plurality of magnetic poles 10 are arranged in a magnetizing ring 9 by magnetizing, and the S poles 101 and the N poles 102 in the magnetic poles 10 are staggered and separated from each other, thereby forming a multi-pole magnetic field in the motor housing 3. When the rotor 2 rotates, the commutator 6 can be used to connect the wires between the motor carbon brushes 5 to achieve high-speed rotation; the two motor carbon brushes 5 are fixed in the motor bottom cover 1 at 90°, and the rotor 2 can be directly installed into the motor bottom cover 1 from one side to form a stable brush connection, thereby accelerating the assembly efficiency of the motor while ensuring the quality of the motor; a capacitor 8 is installed, and the arrangement of the capacitor 8 can enhance the stability of the motor when it is working, thereby ensuring the service life of the motor, and at the same time, the inner end of the capacitor 8 is directly connected to the motor carbon brush 5, and the outer end of the capacitor 8 is pressed on the inner wall of the motor housing 3 by the assembly method of the motor housing 3, thereby completing the stable assembly of the capacitor 8. After the motor is assembled, the capacitor 8 will not fall off, and the capacitor 8 can be quickly replaced during disassembly, which is convenient for use.

[0033] The magnetizing ring 9 is made of neodymium iron boron and is directly fixed on the inner wall of the motor housing 3 by gluing.

[0034] The remanence of the magnetizing ring 9 is 670mT, and the magnetic energy product BH of the magnetizing ring is 64-72KJ / m³.

[0035] Furthermore: a six-slot bobbin 11 is fixedly installed on the rotor 2, a copper wire winding 12 is wound inside the six-slot bobbin 11, the end of the copper wire winding 12 is electrically connected to the commutator 6, the six-slot bobbin 11 of the rotor 2 is installed in the magnetizing ring 9 with a clearance fit, the magnetic pole 10 includes two S poles 101 and two N poles 102, and the two S poles 101 and the two N poles 102 are arranged alternately; thereby forming a six-slot four-pole motor with higher rotation accuracy and stability.

[0036] Furthermore: the outer periphery of the six-slot bobbin 11 is formed with six wire slots 28, the six wire slots 28 are arranged in a circular array, and the copper wire winding 12 is wound and installed in the six wire slots 28; when the copper wire winding 12 is energized, a magnetic field is generated, which cooperates with the magnetic field in the magnetizing ring 9 to provide high-speed rotation force to the rotor 2, thereby realizing stable operation of the motor.

[0037] Furthermore: the motor carbon brush 5 includes a conductive copper sheet 51, a conductive spring sheet 52, a carbon brush body 53 and a shock-absorbing sheet 54. The conductive copper sheet 51 is plugged and installed in the slot 7, the conductive spring sheet 52 is fixedly installed at the inner end of the conductive copper sheet 51, and the carbon brush body 53 is fixedly installed at the other end of the conductive spring sheet 52. The elasticity of the conductive spring sheet 52 itself drives the carbon brush body 53 to press against the outer side of the commutator 6, and the shock-absorbing sheet 54 is fixedly installed on the outer side wall of the conductive spring sheet 52; the conductive spring sheet 52 can be used to drive the carbon brush body 53 to press against the commutator 6 to achieve a stable electrical connection, and the shock-absorbing sheet 54 can be installed on the side wall of the conductive spring sheet 52. The setting of the shock-absorbing sheet 54 can reduce the vibration of the carbon brush body 53 when the motor is working, thereby effectively reducing the noise of the motor, while ensuring the stable electrical connection of the carbon brush body 53 on the commutator 6.

[0038] Optionally, the shock absorbing sheet 54 is a damping strip.

[0039] Furthermore: the motor bottom cover 1 is integrally formed with a plurality of reinforcing ribs 13, the angle between the left and right reinforcing ribs 13 is 90°, the conductive spring sheet 52 is arranged on the inner side of the reinforcing rib 13, and the shock absorbing sheet 54 is installed on the side of the conductive spring sheet 52 close to the reinforcing rib 13; the arrangement of the reinforcing rib 13 can provide space for the motor carbon brush 5 to be installed and positioned, and at the same time can also enhance the strength of the motor bottom cover 1.

[0040] Furthermore: the outer end of the conductive copper sheet 51 extends out of the slot 7, and the outer end of the conductive copper sheet 51 is bent to form a flange 14. After the flange 14 is folded, it is attached to the bottom side of the motor bottom cover 1, and the end of the flange 14 extends out of the motor bottom cover 1. A welding hole 15 is formed at one end of the flange 14 extending out of the motor bottom cover 1; the arrangement in which the flange 14 and the motor bottom cover 1 fit each other can prevent the conductive copper sheet 51 from breaking, thereby facilitating the wiring use of the motor.

[0041] Furthermore: the angle between the two conductive spring pieces 52 is an acute angle; the elastic acute angle structure can allow the carbon brush body 53 to stably rest on the commutator 6 to achieve electrical connection. After the motor is installed, the commutator 6 will support the carbon brush body 53, making the angle between the two conductive spring pieces 52 an obtuse angle.

[0042] Furthermore: the inner end of the conductive copper sheet 51 is formed with a right-angled folded edge 16, and a hole 17 is formed on the right-angled folded edge 16; the motor bottom cover 1 is formed with a support block 18 on the side of the slot 7, and a mounting blind hole 19 is formed on the support block 18, and a positioning pin 20 is fixedly installed between the hole 17 and the mounting blind hole 19; the hole 17 can be opened on the right-angled folded edge 16, and the positioning pin 20 can be used to pass through the hole 17 and fixed to the mounting blind hole 19, so as to achieve stable assembly of the conductive copper sheet 51 in the motor bottom cover 1, and the assembly accuracy is higher.

[0043] Optionally, the installation blind hole 19 is a threaded hole, and the positioning pin 20 is a screw, and the screw is spirally fitted and locked in the threaded hole; the assembly can be achieved by twisting the screw, which is convenient for installation and disassembly.

[0044] Further: the motor bottom cover 1 is formed with two slots 21, and the outer side of the motor bottom cover 1 is formed with two recessed slots 22, and the slots 21 are located at the sides of the recessed slots 22; The outer end of the capacitor 8 extends out of the motor bottom cover 1 through the slot 21 and is installed in the recessed slot 22 with clearance fit. After the motor housing 3 is assembled, the outer end of the capacitor 8 is tightly installed between the recessed slot 22 and the inner wall of the motor housing 3. It can facilitate the placement of the outer end of the capacitor 8. After the motor is assembled, the outer end of the capacitor 8 can be stably electrically connected to the motor housing 3 to ensure the stability of the motor when in use. At the same time, after the motor housing 3 is disassembled, the lock of the outer end of the capacitor 8 can be cancelled, thereby facilitating the disassembly and replacement of the capacitor 8.

[0045] Furthermore: a stepped groove 23 is formed on the outer side of the motor bottom cover 1, the bottom side edge of the motor housing 3 is assembled in the stepped groove 23, the recessed groove 22 is integrally formed in the stepped groove 23, a positioning block 24 is formed in the stepped groove 23, a notch 25 is formed on the bottom side edge of the motor housing 3, and the positioning block 24 is installed in the notch 25 with a clearance fit; so that the motor housing 3 can be accurately assembled on the motor bottom cover 1, and there will be no relative rotation after assembly is completed.

[0046] Furthermore: a bearing groove 26 is formed in the middle of the motor bottom cover 1, and a ball bearing 27 is fixed in the bearing groove 26. The inner ring of the ball bearing 27 is tightly installed on the rotor 2 by adjusting the tolerance; the ball bearing 27 can be used to ensure the stable rotation of the rotor 2, and at the same time, the tolerance is appropriately adjusted to achieve a tight fit connection, so that the stability of the rotor 2 after installation is higher, ensuring that the rotor 2 will not move axially when the motor is in use, thereby ensuring the stability of the motor when it is working.

[0047] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A six-slot magnetized 90° brushed motor with built-in capacitor, comprising a motor bottom cover, a rotor and a motor housing, wherein the rotor is rotatably mounted between the motor bottom cover and the motor housing; characterized in that: The inner side of the motor bottom cover is formed with two carbon brush installation positions, the angle between the two carbon brush installation positions is 90°, the motor carbon brushes are fixedly installed in the carbon brush installation positions, the commutator is fixedly installed on the rotor, and the motor carbon brushes are against the outer side of the commutator to achieve electrical connection; A slot is formed between the carbon brush installation position and the motor bottom cover, a capacitor is installed in the slot with clearance fit, the inner end of the capacitor is electrically connected to the motor carbon brush, the bottom side edge of the motor housing is assembled and installed on the motor bottom cover, and the outer end of the capacitor extends out of the motor bottom cover and is electrically connected to the motor housing; A magnetizing ring is fixedly installed in the motor housing. After magnetization, the magnetizing ring is divided into a plurality of magnetic poles, including S poles and N poles, and the S poles and N poles are arranged alternately. The middle gap of the rotor is installed in the magnetizing ring.

2. According to claim 1, a six-slot magnetized 90° brushed motor with built-in capacitor, characterized in that: A six-slot bobbin is fixedly mounted on the rotor, a copper wire winding is wound inside the six-slot bobbin, ends of the copper wire winding are electrically connected to the commutator, the six-slot bobbin of the rotor is installed in the magnetizing ring with a gap fit, the magnetic poles include two S poles and two N poles, and the two S poles and the two N poles are arranged alternately.

3. A six-slot magnetized 90° brushed motor with built-in capacitor according to any one of claims 1 or 2, characterized in that: The motor carbon brush includes a conductive copper sheet, a conductive spring sheet, a carbon brush body and a shock-absorbing sheet. The conductive copper sheet is inserted and installed in the slot, the conductive spring sheet is fixedly installed at the inner end of the conductive copper sheet, the carbon brush body is fixedly installed at the other end of the conductive spring sheet, the elasticity of the conductive spring sheet itself drives the carbon brush body to press against the outer side of the commutator, and the shock-absorbing sheet is fixedly installed on the outer side wall of the conductive spring sheet.

4. The six-slot magnetized 90° brushed motor with built-in capacitor according to claim 3, characterized in that: A plurality of reinforcing ribs are integrally formed in the motor bottom cover, the conductive spring sheet is arranged on the inner side of the reinforcing ribs, and the shock absorbing sheet is installed on the side of the conductive spring sheet close to the reinforcing ribs.

5. The six-slot magnetized 90° brushed motor with built-in capacitor according to claim 3, characterized in that: The outer end of the conductive copper sheet extends out of the slot, and the outer end of the conductive copper sheet is bent to form a flange, which is folded and attached to the bottom side of the motor bottom cover, and the end of the flange extends out of the motor bottom cover, and one end of the flange extending out of the motor bottom cover is formed with a welding hole.

6. The six-slot magnetized 90° brushed motor with built-in capacitor according to claim 3, characterized in that: The angle between the two conductive spring sheets is an acute angle.

7. The six-slot magnetized 90° brushed motor with built-in capacitor according to claim 3, characterized in that: The inner end of the conductive copper sheet is formed with a right-angle folded edge, a hole is formed on the right-angle folded edge, the motor bottom cover is formed with a support block on the side of the slot, a mounting blind hole is formed on the support block, and a positioning nail is fixedly installed between the hole and the mounting blind hole.

8. The six-slot magnetized 90° brushed motor with built-in capacitor according to claim 1, characterized in that: The motor bottom cover is formed with two slots, and the outer side of the motor bottom cover is formed with two recessed slots, and the slots are located on the sides of the recessed slots; The outer end of the capacitor extends out of the motor bottom cover through the slot and is installed in the recessed groove with clearance fit. After the motor housing is assembled, the outer end of the capacitor is tightly installed between the recessed groove and the inner wall of the motor housing.

9. The six-slot magnetized 90° brushed motor with built-in capacitor according to claim 8, characterized in that: A stepped groove is formed on the outer side of the motor bottom cover, the bottom side edge of the motor housing is assembled in the stepped groove, the recessed groove is integrally formed in the stepped groove, a positioning block is formed in the stepped groove, a notch is formed on the bottom side edge of the motor housing, and the positioning block is installed in the notch with a clearance fit.

10. The six-slot magnetized 90° brushed motor with built-in capacitor according to claim 1, characterized in that: A bearing groove is formed in the middle of the motor bottom cover, a ball bearing is fixedly installed in the bearing groove, and the inner ring of the ball bearing is tightly installed on the rotor by adjusting the tolerance.

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