CN220673521U

CN220673521U - Hollow cup brush direct current motor

Info

Publication number: CN220673521U
Application number: CN202322335424.0U
Authority: CN
Inventors: 侯荣生; 冯万平; 莫龙平; 王海浪
Original assignee: Dongguan Xinbaoda Motor Co ltd
Current assignee: Dongguan Xinbaoda Motor Co ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-03-26
Anticipated expiration: 2033-08-30

Abstract

The utility model discloses a hollow cup brush direct current motor, which comprises a shell and a fixing unit, wherein the shell is provided with a brush body; a shell: the bottom wall of the shell is provided with a neodymium iron boron permanent magnet, the upper end of the shell is provided with an upper cover, a hollow cup rotor is rotationally connected between the upper cover and the shell, the upper end inside the upper cover is provided with symmetrically distributed brush holders, the upper surface of the upper cover is symmetrically provided with wiring lugs, the lower ends of the wiring lugs are respectively fixedly connected with the vertically corresponding brush holders, the inside of each brush holder is provided with an electric brush, and the electric brushes are in sliding connection with a commutator at the upper end of the hollow cup rotor; a fixing unit: the symmetry sets up in the upper end of upper cover, and fixed unit sets up with the cooperation of horizontal adjacent brush respectively, and this hollow cup has brush direct current motor, and the brush is fixed through the fixed block of joint structure, and then can convenient and fast change after the brush wearing and tearing, has prolonged the hollow cup greatly and has brushed direct current motor's life, has reduced use cost.

Description

Hollow cup brush direct current motor

Technical Field

The utility model relates to the technical field of motors, in particular to a hollow cup brush direct current motor.

Background

In our life, the motor is ubiquitous, no matter it is large-scale household electrical appliances such as refrigerator, air conditioner, washing machine, or daily necessities such as razor, electric toothbrush all leave the motor, the type of motor is numerous, the usage is very different, classification method is also many, its hollow cup has brush direct current motor is one of them, hollow cup has brush direct current motor generally by back lid, the brush, hollow cup rotor, magnet and shell etc. the brush can take place relative slip with the commutator of hollow cup rotor in the use, and then the brush can take place wearing and tearing, current brush generally can not change with back lid fixed connection, can cause hollow cup brush direct current motor's disablement after the brush wearing and tearing excessively, consequently restricted hollow cup brush direct current motor's life.

Disclosure of Invention

The utility model aims to overcome the existing defects, and provides the hollow-cup brush direct-current motor which is simple and convenient in brush replacement and good in use convenience, the service life of the motor is greatly prolonged, the use cost is reduced, and the problems in the background technology can be effectively solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a brush DC motor of a hollow cup comprises a shell and a fixing unit;

a shell: the bottom wall of the shell is provided with a neodymium iron boron permanent magnet, the upper end of the shell is provided with an upper cover, a hollow cup rotor is rotationally connected between the upper cover and the shell, the upper end inside the upper cover is provided with symmetrically distributed brush holders, the upper surface of the upper cover is symmetrically provided with wiring lugs, the lower ends of the wiring lugs are respectively fixedly connected with the vertically corresponding brush holders, the inside of each brush holder is provided with an electric brush, and the electric brushes are in sliding connection with a commutator at the upper end of the hollow cup rotor;

a fixing unit: the symmetry sets up in the upper end of upper cover, and fixed unit cooperates the setting with horizontal adjacent brush respectively, and the brush is fixed through the fixed block of joint structure, and then can convenient and fast change after the brush wearing and tearing, has prolonged the life of hollow cup brush direct current motor greatly, has reduced use cost.

Further, the brush includes graphite block, spring, copper line and conducting strip, graphite block sliding connection is in the inside of brush holder respectively, and graphite block all with the commutator sliding connection of hollow cup rotor upper end, the conducting strip is installed respectively in the brush holder one end of keeping away from the hollow cup rotor, all is equipped with the copper line between the inside graphite block of conducting strip and same brush holder, all installs the spring between the inside graphite block of conducting strip and same brush holder, and the spring is located the inside of brush holder respectively, has good power supply effect.

Further, the fixed unit includes fixed block and spacer, the fixed block is inside the square hole of upper cover extrados in the activity grafting respectively, and the fixed block sets up with adjacent conducting strip cooperation respectively, and the inside equal sliding connection of rectangular hole of upper cover upper surface has the spacer, and the lower extreme of spacer is pegged graft with the jack activity of vertical corresponding fixed block upper surface respectively, makes things convenient for the fixed of conducting strip.

Further, the fixing unit further comprises a second spring piece, the second spring piece is symmetrically arranged on the upper surface of the upper cover, and the second spring piece is matched with the transversely adjacent positioning piece respectively, so that the positioning of the positioning piece is facilitated.

Further, the fixing unit further comprises buckling blocks, the buckling blocks are respectively arranged at one ends, far away from the conducting strips, of the fixing blocks, and the fixing blocks are conveniently taken out.

Further, the side that the conducting strip kept away from the spring all symmetry sets up the guide post, and the even transversely adjacent fixed block sliding connection of guide post can provide the direction to the conducting strip and install conveniently.

Further, the side of the fixed block, which is close to the conducting strip, is provided with a first spring piece, the first spring piece is matched with the conducting strip which is transversely adjacent to the first spring piece, the first spring piece provides pressure for the conducting strip, and the conducting strip is ensured to be in close contact with the brush holder.

Compared with the prior art, the utility model has the beneficial effects that: the brush direct current motor of the hollow cup has the following advantages:

after the graphite block excessively wears, can upwards buckle the spacer, the spacer upwards promotes spring leaf two, spring leaf two takes place elastic deformation, spacer and fixed block separation, then spring leaf one promotes the fixed block and moves outward, then take out the fixed block from the inside of upper cover through pulling the knot piece, then can take out brush and guide post and change, the brush is fixed through the fixed block of joint structure, and then can convenient and fast change after the brush wearing and tearing, prolonged the life of hollow cup brush direct current motor greatly, use cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is an enlarged schematic view of the structure of the present utility model at a.

In the figure: 1 shell, 2 neodymium iron boron permanent magnet, 3 upper cover, 4 hollow cup rotor, 5 brush holder, 6 brush, 61 graphite block, 62 spring, 63 copper line, 64 conducting strip, 7 lug, 8 fixed unit, 81 fixed block, 82 locating plate, 83 spring leaf two, 84 buckle block, 9 spring leaf one, 10 guide post.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the present embodiment provides a technical solution: a brush DC motor of a hollow cup comprises a shell 1 and a fixing unit 8;

the shell 1: the bottom wall of the shell is provided with a neodymium iron boron permanent magnet 2, the upper end of the shell 1 is provided with an upper cover 3, the shell 1 and the upper cover 3 provide rotary support for internal parts, a hollow cup rotor 4 is rotationally connected between the upper cover 3 and the shell 1, a commutator supplies power to a coil below the hollow cup rotor 4, a magnetic field generated by the hollow cup rotor 4 repels with the magnetic field of the neodymium iron boron permanent magnet 2, the hollow cup rotor 4 rotates to work, the upper end inside the upper cover 3 is provided with symmetrically distributed brush holders 5, the upper surface of the upper cover 3 is symmetrically provided with wiring lugs 7, the lower ends of the wiring lugs 7 are fixedly connected with the vertically corresponding brush holders 5 respectively, the inside of the brush holders 5 is provided with brushes 6, the brushes 6 are in sliding connection with the commutator at the upper end of the hollow cup rotor 4, the brushes 6 comprise graphite blocks 61, springs 62, copper wires 63 and conductive lugs 64, the graphite blocks 61 are respectively and slidably connected to the inside of the brush frame 5, the graphite blocks 61 are respectively and slidably connected with the commutators at the upper end of the hollow cup rotor 4, the conductive plates 64 are respectively arranged at one end of the brush frame 5 far away from the hollow cup rotor 4, copper wires 63 are respectively arranged between the conductive plates 64 and the graphite blocks 61 in the same brush frame 5, current is transmitted to the commutators at the upper end of the hollow cup rotor 4 through the wiring lugs 7, the brush frame 5, the conductive plates 64, the copper wires 63 and the graphite blocks 61, springs 62 are respectively arranged between the conductive plates 64 and the graphite blocks 61 in the same brush frame 5, the springs 62 are respectively positioned in the brush frame 5, the springs 62 provide thrust for the graphite blocks 61, and the tight contact between the graphite blocks 61 and the commutators at the upper end of the hollow cup rotor 4 is ensured;

fixing unit 8: the symmetry sets up in the upper end of upper cover 3, fixing unit 8 cooperates with the horizontal adjacent brush 6 respectively and sets up, fixing unit 8 includes fixed block 81 and spacer 82, fixed block 81 is inside the square hole of upper cover 3 outer cambered surface respectively movable grafting, fixed block 81 respectively with adjacent conducting strip 64 cooperation setting, the inside equal sliding connection of rectangular hole of upper cover 3 upper surface has spacer 82, the lower extreme of spacer 82 respectively with the jack movable grafting of vertical corresponding fixed block 81 upper surface, fixing unit 8 still includes spring leaf second 83, spring leaf second 83 symmetry sets up in the upper surface of upper cover 3, spring leaf second 83 respectively with the cooperation setting of horizontal adjacent spacer 82, fixing unit 8 still includes button 84, button 84 sets up in the one end that the fixed block 81 kept away from conducting strip 64 respectively, the equal symmetry in side of conducting strip 64 kept away from the spring 62 sets up guide post 10, guide post 10 even horizontal adjacent fixed block 81 sliding connection, guide post 10 can provide the location to fixed block 81 and conducting strip 64, make things convenient for the installation location of conducting strip 64, the side that fixed block 81 is close to conducting strip 64 all is equipped with one and is equipped with 9 respectively with the side that is close to conducting strip 9, the side that is close to conducting strip 9 respectively with the conducting strip 9, the adjacent spring strip 82 is moved to the side of conducting strip 9, then can take out the elastic deformation of the spacer 82 from the fixed block 82 to take out the inside and the fixed block 82 through the elastic deformation of the fixed block 82, the elastic deformation of the fixed block is located piece is located by the side and is located to the top to the side and is moved to the inside and is located to the piece 8.

The working principle of the brush direct current motor of the hollow cup provided by the utility model is as follows: when the electric brush is used, an external power line is connected with the wiring lug 7, current is transmitted to the commutator at the upper end of the hollow cup rotor 4 through the wiring lug 7, the brush holder 5, the conducting strip 64, the copper wire 63 and the graphite block 61, the commutator supplies power to the coil below the hollow cup rotor 4, the magnetic field generated by the hollow cup rotor 4 repels with the magnetic field of the neodymium iron boron permanent magnet 2, the hollow cup rotor 4 rotates to work, the graphite block 61 slides with the commutator at the upper end of the hollow cup rotor 4 in the rotating process of the hollow cup rotor 4, the graphite block 61 is worn, after the graphite block 61 is excessively worn, the positioning piece 82 can be buckled upwards, the positioning piece 82 pushes the second spring piece 83 upwards, the second spring piece 83 is elastically deformed, the positioning piece 82 is separated from the fixed block 81, then the first spring piece 9 pushes the fixed block 81 to move outwards, then the fixed block 81 is taken out from the inner part of the upper cover 3 through pulling the buckling piece 84, and then the electric brush 6 and the guide post 10 can be taken out for replacement.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. A hollow cup brush direct current motor is characterized in that: comprises a shell (1) and a fixing unit (8);

outer casing (1): the bottom wall of the shell is provided with a neodymium iron boron permanent magnet (2), the upper end of the shell (1) is provided with an upper cover (3), a hollow cup rotor (4) is rotationally connected between the upper cover (3) and the shell (1), the upper end inside the upper cover (3) is provided with symmetrically distributed brush holders (5), the upper surface of the upper cover (3) is symmetrically provided with wiring lugs (7), the lower ends of the wiring lugs (7) are fixedly connected with the vertically corresponding brush holders (5) respectively, electric brushes (6) are arranged inside the brush holders (5), and the electric brushes (6) are in sliding connection with commutators at the upper ends of the hollow cup rotor (4);

fixing unit (8): the fixed units (8) are respectively matched with the transversely adjacent brushes (6).

2. A hollow-cup brush dc motor according to claim 1, characterized in that: the electric brush (6) comprises graphite blocks (61), springs (62), copper wires (63) and conducting strips (64), wherein the graphite blocks (61) are respectively connected with the inside of the electric brush frame (5) in a sliding mode, the graphite blocks (61) are respectively connected with the reverser at the upper end of the hollow cup rotor (4) in a sliding mode, the conducting strips (64) are respectively arranged at the end, far away from the hollow cup rotor (4), of the electric brush frame (5), copper wires (63) are respectively arranged between the conducting strips (64) and the graphite blocks (61) inside the same electric brush frame (5), springs (62) are respectively arranged between the conducting strips (64) and the graphite blocks (61) inside the same electric brush frame (5), and the springs (62) are respectively arranged inside the electric brush frame (5).

3. A hollow-cup brush dc motor as claimed in claim 2, wherein: the fixing unit (8) comprises fixing blocks (81) and positioning pieces (82), the fixing blocks (81) are movably inserted into square holes of the outer cambered surface of the upper cover (3) respectively, the fixing blocks (81) are matched with adjacent conductive pieces (64) respectively, the positioning pieces (82) are slidably connected into rectangular holes of the upper surface of the upper cover (3), and the lower ends of the positioning pieces (82) are movably inserted into jacks of the upper surface of the vertically corresponding fixing blocks (81) respectively.

4. A hollow-cup brush dc motor according to claim 3, characterized in that: the fixing unit (8) further comprises a second spring piece (83), the second spring piece (83) is symmetrically arranged on the upper surface of the upper cover (3), and the second spring piece (83) is respectively matched with the transversely adjacent positioning piece (82).

5. A hollow-cup brush dc motor according to claim 3, characterized in that: the fixing unit (8) further comprises buckling blocks (84), and the buckling blocks (84) are respectively arranged at one ends, far away from the conducting strips (64), of the fixing blocks (81).

6. A hollow-cup brush dc motor according to claim 3, characterized in that: the side surfaces of the conducting strips (64) far away from the springs (62) are symmetrically provided with guide posts (10), and the guide posts (10) are uniformly and transversely connected with adjacent fixed blocks (81) in a sliding mode.

7. A hollow-cup brush dc motor according to claim 3, characterized in that: the side of the fixed block (81) close to the conducting strip (64) is provided with a first spring piece (9), and the first spring pieces (9) are respectively matched with the conducting strips (64) adjacent transversely.