CN212323864U

CN212323864U - Brushless DC motor

Info

Publication number: CN212323864U
Application number: CN202020972905.6U
Authority: CN
Inventors: 杨恒飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-01-08
Anticipated expiration: 2030-06-01

Abstract

The utility model discloses a brushless DC motor, including the motor casing, sealed hole has been seted up at motor casing right side middle part, and the motor casing right side is close to the sealed hole left side and has seted up the second bearing hole, and sealed hole interference fit test case lid, the through-hole has been seted up at test case lid middle part, and the through-hole cup joints the motor shaft right-hand member, and the motor shaft is close to the first deep groove bearing inner circle of test case lid left side fixed connection, the sealed hole of first deep groove bearing interference fit, and the motor shaft is close to five seven spacer of first deep groove bearing left side interference fit in the motor. This brushless DC motor directly exposes stator most part in the air through lid, stator and the motor casing behind the motor that sets up, does not wrap up in with motor casing and motor rear cover, can be when motor work produced heat, just can directly give off the heat to the air in to reach the quick radiating purpose of motor, can effectually guarantee simultaneously that the motor keeps under good operating temperature, make it have high job stabilization nature.

Description

Brushless DC motor

Technical Field

The utility model relates to a direct current brushless motor technical field specifically is direct current brushless motor.

Background

The brushless direct current motor is composed of a motor main body and a driver, and is a typical electromechanical integration product. The stator winding of the motor is mostly made into a three-phase symmetrical star connection method, which is very similar to a three-phase asynchronous motor. The rotor of the motor is adhered with a magnetized permanent magnet, and a position sensor is arranged in the motor for detecting the polarity of the rotor of the motor. The driver is composed of power electronics, integrated circuits, etc., and functions are: receiving starting, stopping and braking signals of the motor to control the starting, stopping and braking of the motor; receiving a position sensor signal and a positive and negative rotation signal, and controlling the on-off of each power tube of the inverter bridge to generate continuous torque; receiving a speed instruction and a speed feedback signal for controlling and adjusting the rotating speed; provide protection and display, etc.

The existing brushless direct current motor is completely surrounded in a motor shell, so that heat dissipation is not facilitated, certain defects exist in the sealing performance, and the brushless direct current motor cannot effectively adapt to work in a high-dust environment, so that the demand for improvement of the brushless direct current motor is urgent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a brushless DC motor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a direct current brushless motor comprises a motor shell, wherein a sealing hole is formed in the middle of the right side of the motor shell, a second bearing hole is formed in the right side of the motor shell close to the left side of the sealing hole, the sealing hole is in interference fit with a test box cover, a through hole is formed in the middle of the test box cover and is sleeved with the right end of a motor shaft, the motor shaft is close to the left side of the test box cover and is fixedly connected with a first deep groove bearing inner ring, the first deep groove bearing is in interference fit with the sealing hole, the motor shaft in the motor shell is close to the left side of the first deep groove bearing and is in interference fit with a five-seven spacer, the inner wall of the motor shell is close to the left side of the five-seven spacer and is fixedly connected with a stator right side outer wall, a motor rear cover is arranged on the left side of the stator, a stator, lid supporting seat left side behind lid left side inner wall fixed connection behind the motor, first bearing hole has been seted up at back lid supporting seat right side middle part, back lid supporting seat has been close to first bearing hole left side and has been seted up spacing hole, back lid supporting seat has been close to spacing hole left side and has been seted up back lid mounting hole, first bearing hole interference fit second deep groove bearing, second deep groove bearing inner circle interference fit motor shaft left end, the motor shaft is close to second deep groove bearing left side interference fit hall magnet steel, the motor shaft corresponds hall magnet steel and is provided with hall, the mounting hole has been seted up at the hall middle part, hall magnet steel is cup jointed to the mounting hole, the spacing hole of hall outer lane interference fit, back lid mounting hole fixed connection hull back lid.

Preferably, the sealing hole, the through hole, the second bearing hole, the movable hole, the stator hole, the first bearing hole, the limiting hole, the mounting hole and the rear cover mounting hole are the same, and the sealing hole, the through hole, the second bearing hole, the movable hole, the stator hole, the first bearing hole, the limiting hole, the mounting hole and the rear cover mounting hole are all arranged on the same axis.

Preferably, the rotor length is equal to the stator length and the rotor is disposed within the stator.

Preferably, an inner hexagonal socket head cap screw is arranged between the motor rear cover and the motor casing, and the right side of the motor rear cover is fixedly connected with the left side of the motor casing through the inner hexagonal socket head cap screw.

Preferably, the rear cover supporting seat and the motor rear cover are integrally formed, and the rear cover supporting seat is in a step shape.

Preferably, a fixing hole is formed in the middle of the Hall magnetic steel, and the Hall magnet is in interference fit with the motor shaft through the fixing hole.

Preferably, the rotor is arranged between the second deep groove bearing and the seventeen-five spacer bush of the motor shaft, and the length of the stator and the rotor in the motor shell is larger than that in the motor rear cover.

Preferably, the number of the hexagon socket head cap screws is three, and the hexagon socket head cap screws are distributed on the motor shell and the motor rear cover in a regular triangle.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this brushless DC motor directly exposes stator most part in the air through lid, stator and the motor casing behind the motor that sets up, does not wrap up in with motor casing and motor rear cover, can be when motor work produced heat, just can directly give off the heat to the air in to reach the quick radiating purpose of motor, can effectually guarantee simultaneously that the motor keeps under good operating temperature, make it have high job stabilization nature.

2. This brushless DC motor is through lid behind test case lid and the hall that sets up, can guarantee that the whole inside lid cooperation is in under the good sealed environment behind motor casing, motor, stator, test case lid and the hall, can effectually prevent the entering of external medium, causes the inside damage of motor to can the effectual big environment of various dusts of adaptation.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the front cross-sectional structure of the present invention;

FIG. 3 is a schematic view of the corrosion structure on opposite sides of the present invention;

FIG. 4 is a left side schematic view of the present invention;

fig. 5 is a right side schematic view of the present invention.

In the figure: the testing device comprises a testing box cover 1, a stator 2, a rotor 3, a rear cover 4 Hull, a Hall 5, a Hall 6, a rear cover 7 of a motor, a hexagon socket head cap screw 8, a first deep groove ball bearing 9, a second deep groove ball bearing 10, a distance sleeve 11, a fifth-seventh distance sleeve 11, a motor shaft 12, a motor shell 13, a mounting hole 14, a limiting hole 15, a rear cover supporting seat 16, a first bearing hole 17, a second bearing hole 18, a sealing hole 19, a through hole 20, a rear cover mounting hole 21, a stator hole 22 and a movable hole 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a direct current brushless motor comprises a motor shell 13, a sealing hole 19 is formed in the middle of the right side of the motor shell 13, a second bearing hole 18 is formed in the right side of the motor shell 13 close to the left side of the sealing hole 19, the sealing hole 19 is in interference fit with a test box cover 1, a through hole 20 is formed in the middle of the test box cover 1, the through hole 20 is sleeved on the right end of a motor shaft 12, the motor shaft 12 close to the left side of the test box cover 1 is fixedly connected with an inner ring of a first deep groove bearing 9, the first deep groove bearing 9 is in interference fit with the sealing hole 19, the motor shaft in the motor shell 13 is close to the left side of the first deep groove bearing 9 and is in interference fit with a fifty-seven spacer 11, the inner wall of the motor shell 13 close to the left side of the fifty-seven spacer 11 is fixedly connected with the outer wall of the right side of a stator 2, a motor, the rotor 3 is arranged between a second deep groove bearing 10 and a fifty-seven spacer 11 of a motor shaft 12, the length of the stator 2 and the rotor 3 in a motor shell 13 is larger than that in a motor rear cover 7, the length of the rotor 3 is equal to that of the stator 2, the rotor 3 is arranged in the stator 2, an insulating layer is coated on the outer wall of the stator 2, the arranged motor rear cover 7, the stator 3 and the motor shell 13 directly expose most of the stator 3 in the air without being wrapped by the motor shell 13 and the motor rear cover 7, the heat can be directly dissipated into the air when the motor works to generate heat, so that the purpose of quick heat dissipation of the motor is achieved, meanwhile, the motor can be effectively ensured to be kept at a good working temperature, the motor has high working stability, the stator 2 is cylindrical as a whole, the surface is smooth and has no through hole or gap, the rotor 3 is fixedly connected with the motor shaft 12, the inner wall of the left side of a rear motor cover 7 is fixedly connected with the left side of a rear motor cover supporting seat 16, the rear motor cover supporting seat 16 and the rear motor cover 7 are integrally formed, the rear motor cover supporting seat 16 is in a step shape, the middle part of the right side of the rear motor cover supporting seat 16 is provided with a first bearing hole 17, the rear motor cover supporting seat 16 is provided with a limiting hole 15 close to the left side of the first bearing hole 17, the rear motor cover supporting seat 16 is provided with a rear cover mounting hole 21 close to the left side of the limiting hole 15, the first bearing hole 17 is in interference fit with a second deep groove bearing 10, the inner ring of the second deep groove bearing 10 is in interference fit with the left end of a motor shaft 12, the motor shaft 12 is in interference fit with a Hall magnetic steel 6 close to the left side of the second deep groove bearing 10, the motor shaft 12 is provided with a Hall magnet 6 corresponding to the Hall magnet 6, the middle part of the Hall, the rear cover mounting hole 21 is fixedly connected with the Hull rear cover 4, the sealing hole 19, the through hole 20, the second bearing hole 18, the movable hole 23, the stator hole 22, the first bearing hole 17, the limiting hole 15, the mounting hole 14 and the rear cover mounting hole 21 are the same, the sealing hole 19, the through hole 20, the second bearing hole 18, the movable hole 23, the stator hole 22, the first bearing hole 17, the limiting hole 15, the mounting hole 14 and the rear cover mounting hole 21 are all arranged on the same axis, the inner hexagonal socket head screw 8 is arranged between the motor rear cover 7 and the motor shell 13, the right side of the motor rear cover 7 is fixedly connected with the left side of the motor shell 13 through the inner hexagonal socket head screw 8, the inner hexagonal socket head screws 8 are three and are distributed on the motor shell 13 and the motor rear cover 7 in a regular triangle, and the whole inner part of the motor can be ensured to pass through the motor shell 13, the motor rear cover 7, the Hall rear cover 4 and the test box cover 1 Stator 3, lid 4 under the mating reaction is in good sealed environment behind test case lid 1 and the hall, can effectually prevent the entering of external medium, cause the inside damage of motor, thereby can effectually adapt to the environment that various dusts are big, the rotation of assurance motor shaft 12 that first degree of depth bearing 9 and second degree of depth bearing 10 that set up simultaneously can be good, can be effectual with the magnetic force that produces between stator 2 and the rotor 3, change into the power of the motor shaft 12 of motor, simultaneously through the sealed hole 19 of seting up, through-hole 20, second bearing hole 18, the movable hole 23, stator hole 22, first bearing hole 17, spacing hole 15, mounting hole 14, back lid mounting hole 21 can further make things convenient for the dismantlement and the maintenance of motor, simultaneously can also make things convenient for the maintenance and the change of wearing parts.

When using, stator 2 and rotor 3 are magnetic under the effect of circular telegram back rotor 3 rotates to drive motor shaft 12 and rotate, when taking place the heat, through the part that stator 2 exposes in the air, directly dispel the heat, cover 4 cooperation assurance motor internal sealing environment behind motor casing 13, motor rear cover 7, stator 3, test case lid 1 and the hall.

In summary, the brushless dc motor directly exposes most of the stator 3 to the air through the motor rear cover 7, the stator 3 and the motor housing 13, the motor casing 13 and the motor rear cover 7 are not wrapped, so that when the motor works to generate heat, the heat can be directly dissipated into the air to achieve the purpose of quickly dissipating the heat of the motor, meanwhile, the motor can be effectively ensured to be kept at a good working temperature, so that the motor has extremely high working stability, through lid 4 behind test case lid 1 and the hall that sets up, can guarantee that the whole inside motor is in under the good sealed environment through lid 7 behind motor casing 13, the motor, stator 3, test case lid 1 and the hall under the lid 4 mating reaction, can effectually prevent the entering of external medium, cause the inside damage of motor to can the effectual big environment of various dusts of adaptation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A brushless dc motor comprising a motor housing (13), characterized in that: the middle part of the right side of the motor shell (13) is provided with a sealing hole (19), the right side of the motor shell (13) is close to the left side of the sealing hole (19) and is provided with a second bearing hole (18), the sealing hole (19) is in interference fit with the test box cover (1), the middle part of the test box cover (1) is provided with a through hole (20), the through hole (20) is sleeved with the right end of a motor shaft (12), the motor shaft (12) is close to the left side of the test box cover (1) and is fixedly connected with the inner ring of a first deep groove bearing (9), the first deep groove bearing (9) is in interference fit with the sealing hole (19), the motor shaft in the motor shell (13) is close to the left side of the first deep groove bearing (9) and is in interference fit with a five-seven spacer (11), the inner wall of the motor shell (13) is close to the left side of the five, the motor back cover (7) right side has been seted up stator hole (22), stator hole (22) interference fit stator (2) left side, movable hole (23) have been seted up at stator (2) middle part, movable hole (23) cup joint rotor (3), rotor (3) fixed connection motor shaft (12), motor back cover (7) left side inner wall fixed connection back cover supporting seat (16) left side, back cover supporting seat (16) right side middle part has seted up first bearing hole (17), back cover supporting seat (16) are close to first bearing hole (17) left side and have seted up spacing hole (15), back cover supporting seat (16) are close to spacing hole (15) left side and have seted up back cover mounting hole (21), first bearing hole (17) interference fit second deep groove bearing (10), second interference deep groove bearing (10) inner circle cooperation motor shaft (12) left end, motor shaft (12) are close to second deep groove bearing (10) left side interference fit hall magnet steel (6), motor shaft (12) correspond hall magnet steel (6) and are provided with hall (5), mounting hole (14) have been seted up at hall (5) middle part, hall magnet steel (6) are cup jointed in mounting hole (14), spacing hole of hall (5) outer lane interference fit (15), back lid mounting hole (21) fixed connection hull back lid (4).

2. A dc brushless motor according to claim 1, wherein: the sealing hole (19), the through hole (20), the second bearing hole (18), the movable hole (23), the stator hole (22), the first bearing hole (17), the limiting hole (15), the mounting hole (14) and the rear cover mounting hole (21) are all the same, and the sealing hole (19), the through hole (20), the second bearing hole (18), the movable hole (23), the stator hole (22), the first bearing hole (17), the limiting hole (15), the mounting hole (14) and the rear cover mounting hole (21) are all arranged on the same axis.

3. A dc brushless motor according to claim 1, wherein: the length of the rotor (3) is equal to that of the stator (2), and the rotor (3) is arranged in the stator (2).

4. A dc brushless motor according to claim 1, wherein: an inner hexagonal socket head cap screw (8) is arranged between the motor rear cover (7) and the motor shell (13), and the right side of the motor rear cover (7) is fixedly connected with the left side of the motor shell (13) through the inner hexagonal socket head cap screw (8).

5. A dc brushless motor according to claim 1, wherein: the rear cover supporting seat (16) and the motor rear cover (7) are integrally formed, and the rear cover supporting seat (16) is in a step shape.

6. A dc brushless motor according to claim 1, wherein: the middle part of the Hall magnetic steel (6) is provided with a fixing hole, and the Hall magnet (5) is in interference fit with the motor shaft (12) through the fixing hole.

7. A dc brushless motor according to claim 1, wherein: the rotor (3) is arranged between a second deep groove bearing (10) and a fifty-seven spacer bush (11) of the motor shaft (12), and the length of the stator (2) and the rotor (3) in the motor shell (13) is larger than that in the motor rear cover (7).

8. A brushless DC motor according to claim 4, characterized in that: the number of the inner hexagonal socket head cap screws (8) is three, and the inner hexagonal socket head cap screws are distributed on the motor shell (13) and the motor rear cover (7) in a regular triangle shape.