Magnet fixing mechanism for brush motor

Abstract

The utility model provides a magnet fixing mechanism for a brush motor, relates to the field of brush motors, and adopts the following scheme that the magnet fixing mechanism comprises a stator mechanism, a rotor mechanism, a rubber cover mechanism and an iron rear cover, the stator mechanism comprises a casing and a magnet, the inner wall of the casing is provided with a boss, the edges of the two ends of the magnet are provided with gaps, and the rubber cover mechanism and the iron rear cover are arranged in the gaps. The magnet comprises an N pole and an S pole, the N pole and the S pole are symmetrically arranged and fixedly connected, and the two notches are both arranged at the boundary of the N pole and the S pole. Rapid clamping of the magnet and the shell is achieved through cooperation of the notches and the bosses, radial and axial positioning effects on the magnet are achieved, the notches are formed in the boundary of the N pole and the S pole, the main magnetic field of the magnet is not affected, any end of the magnet can be matched with the bosses in the assembling process through the notches formed in the two ends of the magnet, the direction of the magnet does not need to be turned, and the assembling efficiency is improved. And the magnet is convenient to assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to a brush motor technical field especially relates to a magnet fixing mechanism for brush motor. BACKGROUND

[0002] Brush DC motor is a kind of motor that realizes current commutation through brush and commutator, it can convert electrical energy into mechanical energy, is widely used in various small-sized mechanical equipment needing drive;Conventional brush motor, magnet is usually ferrite, with the demand of market, customer usually hopes that in the volume of same size, compared with the existing ferrite motor, there is greater output power, but the price cannot be too expensive, the polarity of magnet is positionally required relative to the shell, so as to exert the maximum efficiency of magnet, this is the characteristics of brush motor.

[0003] The magnet of the existing brush motor is usually annular bonded neodymium-iron-boron magnet, since the shell of the brush motor is usually round and the magnet is annular, it is troublesome to realize stable connection between the two, especially without affecting the magnetic field performance of the magnet, therefore we propose a magnet fixing mechanism for brush motor to solve this problem. SUMMARY

[0004] In order to solve the above problems, the utility model provides a magnet fixing mechanism for brush motor to more exactly solve the above-mentioned problems.

[0005] The utility model discloses a magnet fixing mechanism for brush motor is realized through the following technical scheme:

[0006] The utility model discloses a magnet fixing mechanism for brush motor, including stator mechanism, rotor mechanism, glue cover mechanism and iron back cover, the stator mechanism includes the shell and magnet, the inner wall of shell is provided with the boss, the both ends edge of magnet is all set with the notching, the notching is suitable for the boss, the magnet includes N pole and S pole, N pole and S pole are symmetrically arranged and fixedly connected, two the notching is set at the demarcation line of N pole and S pole.

[0007] Further, the inner wall of the magnet is tightly attached to the shell, and the outer side of the magnet is fixedly connected to the inner wall of the shell by anaerobic glue.

[0008] Further, the rotor mechanism includes a motor shaft, a thrust ring, an enameled wire, a rotor core, a fan blade, a commutator and a gasket, the rotor core is rotatably sleeved on the outer side of the motor shaft, and the commutator is fixedly sleeved on the outer side of the motor shaft and connected with the enameled wire.

[0009] Further, the glue cover mechanism includes a cover body, two brush arm terminal assemblies and two carbon brushes, the glue cover mechanism is fixedly connected with the inner wall of the shell, and the glue cover mechanism is rotatably sleeved on the outer side of the commutator.

[0010] Further, one end of the brush arm terminal assembly is fixedly connected with the inner wall of the cover body, the other end of the brush arm terminal assembly is fixedly connected with the carbon brush, the two brush arm terminal assemblies are centrally symmetrically arranged, and the carbon brush is tightly attached to the outer side of the commutator.

[0011] Further, one side of the iron back cover is fixedly connected with one end of the shell, so as to enclose the stator mechanism, the rotor mechanism and the rubber cover mechanism in the shell, and the rubber cover mechanism is arranged between the rotor mechanism and the iron back cover.

[0012] Further, the iron back cover and the shell are provided with convex round shells, oil bearings are fixedly installed in the convex round shells, and the two oil bearings are arranged on the outer side of the motor shaft.

[0013] Further, the inner wall of the shell is provided with a plurality of concave platforms, and the outer side of the shell is provided with a positioning opening.

[0014] The magnetic stone fixing mechanism for the brush motor has the advantages that:

[0015] The notch and the convex platform are matched to realize the quick clamping of the magnetic stone and the shell, the notch is arranged at the boundary between the N pole and the S pole, the main magnetic field of the magnetic stone is not affected, the notch arranged at the two ends of the magnetic stone can be matched with the convex platform during assembly, the direction of the magnetic stone does not need to be adjusted, and the assembly of the magnetic stone is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A sectional view structural schematic view of the magnetic stone fixing mechanism for the brush motor is provided in the utility model;

[0017] Figure 2 A sectional view structural schematic view of the stator mechanism of the magnetic stone fixing mechanism for the brush motor is provided in the utility model;

[0018] Figure 3 A sectional view structural schematic view of the shell of the magnetic stone fixing mechanism for the brush motor is provided in the utility model;

[0019] Figure 4 A top view structural schematic view of the magnetic stone of the magnetic stone fixing mechanism for the brush motor is provided in the utility model;

[0020] Figure 5 A sectional view structural schematic view of the magnetic stone of the magnetic stone fixing mechanism for the brush motor is provided in the utility model;

[0021] Figure 6 A front view structural schematic view of the rotor mechanism of the magnetic stone fixing mechanism for the brush motor is provided in the utility model.

[0022] Figure 7 A front view structural schematic view of a rubber cover mechanism of a magnet fixing mechanism for a brush motor is provided in the utility model.

[0023] Figure 8 A sectional view structural schematic view of an iron back cover of a magnet fixing mechanism for a brush motor is provided in the utility model.

[0024] The reference signs are as follows:

[0025] In the drawing: 1, oil bearing; 2, machine shell; 3, magnet; 4, motor shaft; 5, thrust ring; 6, enameled wire; 7, rotor iron core; 8, fan blade; 9, commutator; 10, gasket; 11, cover body; 12, brush arm terminal assembly; 13, carbon brush; 14, iron back cover; 15, convex round shell; 16, notch; 17, N pole; 18, S pole; 19, boss; 20, concave table; 21, positioning port. DETAILED DESCRIPTION

[0026] In order to more clearly and completely illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings.

[0027] Please refer to Figures 1-8 The utility model provides a kind of magnet fixing mechanism for brush motor, including stator mechanism, rotor mechanism, rubber cover mechanism and iron back cover 14, stator mechanism includes machine shell 2 and magnet 3, boss 19 is provided on the inner wall of machine shell 2, notch 16 is set at the both ends edge of magnet 3, notch 16 is adapted with boss 19, magnet 3 includes N pole 17 and S pole 18, N pole 17 and S pole 18 are symmetrically arranged and fixedly connected, two notches 16 are all arranged at the boundary line of N pole 17 and S pole 18.

[0028] It needs to be explained that the cooperation of notch 16 and boss 19 realizes the quick clamping of magnet 3 and shell, and plays the role of radial and axial positioning to magnet 3, by the notch 16 set at the both ends of magnet 3, magnet 3 can be matched with boss 19 at any end during assembly, without adjusting the direction of magnet 3.

[0029] It is further explained that N pole 17 and S pole 18 are both semicylindrical, and the magnetic field strength at the boundary is the lowest, and the notch 16 is set on the boundary line without affecting the main magnetic field.

[0030] As shown in Figure 1 And Figure 2 Magnet 3 is closely attached to the inner wall of machine shell 2, and the outer side of magnet 3 is fixedly connected with the inner wall of machine shell 2 by anaerobic adhesive.

[0031] As shown in Figure 1 And Figure 6As shown, the rotor mechanism includes motor shaft 4, thrust ring 5, enameled wire 6, rotor core 7, fan blade 8, commutator 9 and gasket 10, rotor core 7 is rotatably sleeved on the outside of motor shaft 4, commutator 9 is fixedly sleeved on the outside of motor shaft 4 and is connected with enameled wire 6, the glue cover mechanism includes cover body 11, two brush arm terminal assemblies 12 and two carbon brushes 13, the glue cover mechanism is fixedly connected with the inner wall of the shell 2, and the glue cover mechanism is rotatably sleeved on the outside of the commutator 9.

[0032] As shown in the drawings, Figure 7 One end of the brush arm terminal assembly 12 is fixedly connected with the inner wall of the cover body 11, the other end of the brush arm terminal assembly 12 is fixedly connected with the carbon brush 13, the two brush arm terminal assemblies 12 are centrally symmetrically arranged, the carbon brush 13 is closely attached to the outside of the commutator 9, and the brush arm terminal assembly 12 is symmetrically distributed around the motor shaft 4, so that the two carbon brushes 13 uniformly exert pressure, and the current distribution on the commutator 9 is more balanced.

[0033] It should be noted that the glue cover mechanism is on the outside of the commutator 9, directly covers and protects the commutator 9, the commutator 9 is fixed on the motor shaft 4 and rotates with the rotor mechanism, while the glue cover is stationary; The glue cover mechanism prevents dust, moisture and other contaminants from entering the motor interior, protects the internal components from environmental influences, and the carbon brush 13 is used to transfer current from the stationary external circuit to the rotating commutator 9 during motor operation, thereby powering the rotor coil.

[0034] As shown in the drawings, Figure 1 And Figure 8 As shown in the drawings, one side of the iron back cover 14 is fixedly connected with one end of the shell 2, for enclosing the stator mechanism, the rotor mechanism and the glue cover mechanism in the shell 2, the glue cover mechanism is arranged between the rotor mechanism and the iron back cover 14, and the iron back cover 14 and the shell 2 are both provided with convex round shells 15, and the oil bearings 1 are fixedly installed in the convex round shells 15, and the two oil bearings 1 are both arranged on the outside of the motor shaft 4.

[0035] As shown in the drawings, Figure 2 And Figure 3 As shown in the drawings, a plurality of recesses 20 are arranged on the inner wall of the shell 2, and a positioning opening 21 is formed on the outside of the shell 2, so as to facilitate clamping with the structures on the glue cover and the rotor mechanism, and improve the stability after assembly of the multiple mechanisms.

[0036] Of course, the present application also has other various embodiments, and based on the present embodiment, other embodiments obtained by those skilled in the art without any creative labor fall within the scope of the present application.

Claims

1. A magnet fixing mechanism for a brush motor, characterized by, Including stator mechanism, rotor mechanism, glue cover mechanism and iron back cover, the stator mechanism includes the casing and the magnet, the inner wall of the casing is provided with the boss, the both ends edges of the magnet are all set up the gap, the gap is matched with the boss, the magnet includes N pole and S pole, the N pole and S pole are symmetrically set and fixedly connected, two the gap is set at the boundary line of N pole and S pole.

2. The magnet fixing mechanism for a brush motor according to claim 1, characterized by The magnet is closely attached to the inner wall of the casing, and the outer side of the magnet is fixedly connected with the inner wall of the casing by anaerobic glue.

3. The magnet fixing mechanism for a brush motor according to claim 1, wherein The rotor mechanism includes motor shaft, thrust ring, enameled wire, rotor core, fan blade, commutator and gasket, the rotor core is rotatably sleeved on the outer side of the motor shaft, and the commutator is fixedly sleeved on the outer side of the motor shaft and connected with the enameled wire.

4. The magnet fixing mechanism for a brush motor according to claim 1, wherein The glue cover mechanism includes a cover body, two brush arm terminal assemblies and two carbon brushes, the glue cover mechanism is fixedly connected with the inner wall of the casing, and the glue cover mechanism is rotatably sleeved on the outer side of the commutator.

5. The magnet fixing mechanism for a brush motor according to claim 4, wherein One end of the brush arm terminal assembly is fixedly connected with the inner wall of the cover body, the other end of the brush arm terminal assembly is fixedly connected with the carbon brush, the two brush arm terminal assemblies are centrally symmetrically arranged, and the carbon brush is closely attached to the outer side of the commutator.

6. The magnet fixing mechanism for a brush motor according to claim 1, wherein One side of the iron back cover is fixedly connected with one end of the casing, for enclosing the stator mechanism, the rotor mechanism and the glue cover mechanism in the casing, and the glue cover mechanism is arranged between the rotor mechanism and the iron back cover.

7. The magnet fixing mechanism for a brush motor according to claim 1, wherein The iron back cover and the casing are both provided with convex round shells, oil bearings are fixedly installed in the convex round shells, and the two oil bearings are arranged on the outer side of the motor shaft.

8. The magnet fixing mechanism for a brush motor according to claim 1, wherein A plurality of recesses are arranged on the inner wall of the casing, and a positioning opening is formed on the outer side of the casing.

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