CN216751382U

CN216751382U - Direct current brushless motor

Info

Publication number: CN216751382U
Application number: CN202122822356.1U
Authority: CN
Inventors: 佘辉
Original assignee: Kaihua Ruichang Motor Co ltd
Current assignee: Kaihua Ruichang Motor Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-06-14
Anticipated expiration: 2031-11-18

Abstract

The utility model discloses a direct current brushless motor, which comprises a rear cover, a first bearing, a second bearing, a current conducting plate, a coil, magnetic steel, a rotating shaft, a machine shell, a conducting wire and a front cover, wherein the machine shell is sleeved on the coil, the coil is sleeved on the magnetic steel, the magnetic steel is sleeved on the rotating shaft, the current conducting plate is electrically connected with the conducting wire, the current conducting plate is connected with the coil through the first bearing, the rear cover is sleeved on the current conducting plate, the front cover is rotatably connected with the machine shell through the second bearing, the coil is electrically connected with the current conducting plate, the coil is electrically connected with the magnetic steel, and the magnetic steel is rotatably connected with the rotating shaft. The utility model has high working efficiency, low energy consumption and low interference; the utility model has no electric brush, the friction force is greatly reduced during the operation, the operation is very smooth, and the noise is low; the utility model is small and exquisite, and can be applied to more fields.

Description

Direct current brushless motor

Technical Field

The present invention relates to a brushless dc motor.

Background

Brush motors and brushless motors exist in the existing market, the brush motors adopt mechanical commutation, magnetic poles are fixed, and coils rotate. When the motor works, the coil and the commutator rotate, the magnetic steel and the carbon brush do not rotate, the alternating change of the current direction of the coil is completed by the phase converter and the electric brush which rotate along with the motor, so that the mutual sliding can rub the carbon brush to cause loss, the carbon brush needs to be replaced periodically, the carbon brush and the coil connector lug are switched on and off alternately, electric sparks can occur, and electromagnetic damage is generated to interfere electronic equipment.

The direct current motor can be used for driving a small blood pump in the artificial heart; in China, brushless direct current motors are used for high-speed centrifuges of high-speed instruments for operations, thermal imagers and infrared laser modulators of thermometers. The field of office computer peripheral equipment and electronic digital consumer goods is the field with the widest popularization and the largest quantity of brushless direct current motors. Such as printers, facsimile machines, copiers, hard disk drives, floppy disk drives, film cameras, tape recorders, etc., which are commonly found in life, have the shadow of a brushless dc motor in the drive control of their main and accessory movements. The existing direct current brushless motor has the defects of large volume and large noise, and is easy to break down after being used for a long time, so that the service life is short, and electric sparks and electromagnetic damage can occur during operation, thereby interfering electronic equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides a direct current brushless motor.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides a brushless DC motor, includes back lid, first bearing, second bearing, current conducting plate, coil, magnet steel, pivot, casing, conductor wire, protecgulum, the casing overlaps on the coil, the coil housing is on the magnet steel, the magnet steel cover is in the pivot, current conducting plate and conductor wire electric connection, the current conducting plate passes through first bearing and coil connection, back lid cover is on the current conducting plate, the protecgulum passes through the second bearing and is connected with the casing rotation, coil and current conducting plate electric connection, coil and magnet steel electric connection, the magnet steel rotates with the pivot to be connected.

Preferably, the utility model also comprises a polyester gasket, and the polyester gasket is arranged at the bottom of the machine shell.

Preferably, the front end of the rotating shaft penetrates through the casing, the polyester gasket, the second bearing and the front cover in sequence.

Preferably, the rear cover is provided with a through hole, one end of the conductive wire is fixed on the conductive plate, and the other end of the conductive wire penetrates out of the through hole.

Preferably, the conductive plate has a circular ring shape.

Preferably, the housing is located between the front cover and the rear cover.

Preferably, the first bearing and the second bearing are both ball bearings.

The utility model has the following beneficial effects: the utility model has high working efficiency, low energy consumption and low interference; the utility model has no electric brush, the friction force is greatly reduced during the operation, the operation is very smooth, and the noise is low; the utility model has the advantages of few and simple components, small volume and complete functions, so that the utility model is small and exquisite and can be applied to more fields; the electric lead and the coil are electrically connected together by using the conductive plate as a bridge, so that the motor can be started only by connecting the electric lead with the driver externally, a starting winding is not additionally arranged on the rotor like a synchronous motor which is started under heavy load under variable frequency speed regulation, and oscillation and step loss can not be generated when the load suddenly changes.

Drawings

FIG. 1 is a schematic view of an assembly structure of the present invention;

fig. 2 is a schematic perspective view of the present invention.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings of the specification:

as shown in fig. 1 and 2, a brushless dc motor includes a rear cover 1, a first bearing 2, a second bearing 12, a conductive plate 3, a coil 4, a magnetic steel 5, a rotating shaft 6, a casing 7, a conductive wire 9, a front cover 10, and a polyester gasket 8, wherein the casing 7 is sleeved on the coil 4, the coil 4 is sleeved on the magnetic steel 5, the magnetic steel 5 is sleeved on the rotating shaft 6, the conductive plate 3 is electrically connected with the conductive wire 9, the conductive plate 3 is connected with the coil 4 through the first bearing 2, the rear cover 1 is sleeved on the conductive plate 3, the front cover 10 is rotatably connected with the casing 7 through the second bearing 12, the coil 4 is electrically connected with the conductive plate 3, the coil 4 is electrically connected with the magnetic steel 5, the magnetic steel 5 is rotatably connected with the rotating shaft 6, and the polyester gasket 8 is installed at the bottom of the casing 7.

As shown in fig. 1 and 2, the front end of the rotating shaft 6 sequentially penetrates through the casing 7, the polyester gasket 8, the second bearing 12 and the front cover 10, the rear cover 1 is provided with a through hole 11, one end of the conductive wire 9 is fixed on the conductive plate 3, the other end of the conductive wire 9 penetrates out of the through hole 11, the conductive plate 3 is in a circular ring shape, the casing 7 is located between the front cover 10 and the rear cover 1, and the first bearing 2 and the second bearing 12 are both ball bearings.

The magnetic steel is a magnetic pole, the coil is fixed, and the magnetic pole rotates. The controller is externally connected with the controller through the conducting wire 9, so that the controller energizes the magnetic steel through the coil and enables the magnetic steel to rotate. Polyester shim 8 acts as a buffer to further reduce noise.

The utility model has high working efficiency, low energy consumption and low interference; the utility model has no electric brush, the friction force is greatly reduced during the operation, the operation is very smooth, and the noise is low; the utility model has the advantages of few and simple components, small volume and complete functions, so that the utility model is small and exquisite and can be applied to more fields; the electric lead and the coil are electrically connected together by using the conductive plate as a bridge, so that the motor can be started only by connecting the electric lead with the driver externally, a starting winding is not additionally arranged on the rotor like a synchronous motor which is started under heavy load under variable frequency speed regulation, and oscillation and step loss can not be generated when the load suddenly changes.

It should be noted that the above list is only one specific embodiment of the present invention. It is clear that the utility model is not limited to the embodiments described above, but that many variations are possible, all of which can be derived or suggested directly from the disclosure of the utility model by a person skilled in the art, and are considered to be within the scope of the utility model.

Claims

1. The direct-current brushless motor is characterized by comprising a rear cover (1), a first bearing (2), a second bearing (12), a current-conducting plate (3), a coil (4), magnetic steel (5), a rotating shaft (6), a housing (7), a conducting wire (9) and a front cover (10), wherein the housing (7) is sleeved on the coil (4), the coil (4) is sleeved on the magnetic steel (5), the magnetic steel (5) is sleeved on the rotating shaft (6), the current-conducting plate (3) is electrically connected with the conducting wire (9), the current-conducting plate (3) is connected with the coil (4) through the first bearing (2), the rear cover (1) is sleeved on the current-conducting plate (3), the front cover (10) is rotatably connected with the housing (7) through the second bearing (12), the coil (4) is electrically connected with the current-conducting plate (3), the coil (4) is electrically connected with the magnetic steel (5), the magnetic steel (5) is rotationally connected with the rotating shaft (6).

2. A dc brushless motor according to claim 1, further comprising a polyester gasket (8), said polyester gasket (8) being mounted on the bottom of the housing (7).

3. The dc brushless motor according to claim 2, wherein the front end of the rotating shaft (6) sequentially penetrates through the housing (7), the polyester gasket (8), the second bearing (12), and the front cover (10).

4. A brushless dc motor according to claim 1, wherein the rear cover (1) is provided with a through hole (11), one end of the conductive wire (9) is fixed to the conductive plate (3), and the other end of the conductive wire (9) extends through the through hole (11).

5. A dc brushless motor according to claim 1, characterized in that the conductive plate (3) has a circular ring shape.

6. A dc brushless motor according to claim 1, characterized in that the housing (7) is located between the front cover (10) and the back cover (1).

7. A dc brushless motor according to claim 1, characterized in that the first bearing (2) and the second bearing (12) are ball bearings.