CN218920195U

CN218920195U - DC brushless motor with Hall sensor

Info

Publication number: CN218920195U
Application number: CN202223172102.0U
Authority: CN
Inventors: 孙豪远; 江林飞
Original assignee: Zhejiang Yongchang Electric Corp
Current assignee: Zhejiang Yongchang Electric Corp
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-04-25
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to the technical field of direct current brushless motors, in particular to a direct current brushless motor with a Hall sensor, which comprises a shell, wherein a stator is fixedly connected to the inner wall of the shell, a rotor is arranged in the middle of the shell, a rotating shaft is fixedly connected to the middle of the rotor, a fixing frame is fixedly connected to the tail part of the shell, the Hall sensor is fixedly connected to the middle of the fixing frame, the rotating shaft penetrates through the middle of the fixing frame and the Hall sensor, a magnetic ring is arranged on the rotating shaft, and the magnetic ring is positioned on one side, close to the rotor, of the Hall sensor.

Description

DC brushless motor with Hall sensor

Technical Field

The utility model relates to the technical field of direct current brushless motors, in particular to a direct current brushless motor with a Hall sensor.

Background

Current brushless DC motor in market includes shell, stator, rotor and hall sensor, and the shell includes circular casing, rear end cap and front end housing, and hall sensor passes through the installing support to be fixed on stator or rotor, and chinese patent document for example patent document number CN212163129U discloses a brushless DC motor's hall sensor mounting structure, wherein is provided with hall sensor on the stator body, and this structure makes the heat that the motor produced when the operation can be transmitted to hall sensor along with the stator body on, leads to hall sensor's location not accurate enough, and hall sensor can shorten its life in long-time high temperature environment work moreover.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the utility model aims to provide a direct current brushless motor with a Hall sensor, which solves the problems existing in the prior art, and the device solves the problems of inaccurate positioning and reduced service life of the Hall sensor caused by heat generated by motor operation.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a take hall sensor's direct current brushless motor, includes the shell, shell inner wall fixedly connected with stator is equipped with the rotor in the middle of the shell, fixedly connected with pivot in the middle of the rotor, shell afterbody fixedly connected with mount, fixedly connected with hall sensor in the middle of the mount, the pivot passes the centre of mount and hall sensor, the pivot is equipped with the magnetic ring, the magnetic ring is located the one side that hall sensor is close to the rotor.

Preferably, the pole pairs of the magnetic ring correspond to the poles of the rotor.

Preferably, the fixing frame is provided with reinforcing ribs which are distributed along the round surface at 90 degrees.

Preferably, heat dissipation holes are arranged between the reinforcing ribs, and the heat dissipation holes are fan-shaped.

Preferably, a movable hole is formed in the middle of the fixing frame, and a positioning groove is formed in one side of the movable hole.

Preferably, one side of the Hall sensor is provided with a positioning convex head, and the position of the positioning convex head corresponds to the positioning groove.

Preferably, the Hall sensor is symmetrically provided with mounting holes on two sides forming 90 degrees with the positioning convex head, and the mounting holes are fixedly connected to the fixing frame through bolts.

Preferably, the middle of the Hall sensor is provided with a fixing hole which is arranged in an equilateral triangle shape.

(III) beneficial effects

1. The utility model provides a direct current brushless motor with a Hall sensor, which is characterized in that a fixing frame is arranged at the tail part of a shell, the Hall sensor is fixedly connected to the fixing frame, a magnetic ring is arranged on a rotating shaft, the pole pair number of the magnetic ring corresponds to the magnetic pole of a rotor, the external arrangement of the Hall sensor is realized, and compared with the prior art, the direct current brushless motor with the Hall sensor can reduce the heat transferred to the Hall sensor when the motor operates, and reduce the influence of the heat on the Hall sensor, so that the Hall sensor is positioned accurately, and the service life of the Hall sensor is prolonged.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic structural diagram of the whole interior of the present utility model.

Fig. 3 is a schematic structural view of the fixing frame of the present utility model.

Fig. 4 is a schematic structural diagram of the hall sensor of the present utility model.

In the figure: 1-shell, 2-rotor, 3-mount, 4-hall sensor, 5-stator, 6-magnetic ring, 7-pivot, 8-strengthening rib, 9-louvre, 10-movable hole, 11-positioning groove, 12-location raised head, 13-fixed orifices, 14-mounting hole.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 4 of the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, 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.

The utility model provides a technical scheme that: the utility model provides a take hall sensor's brushless DC motor, including shell 1, shell 1 inner wall fixedly connected with stator 5, be equipped with rotor 2 in the middle of the shell 1, fixedly connected with pivot 7 in the middle of the rotor 2, shell 1 afterbody fixedly connected with mount 3, fixedly connected with hall sensor 4 in the middle of the mount 3, pivot 7 passes the centre of mount 3 and hall sensor 4, pivot 7 is equipped with magnetic ring 6, magnetic ring 6 is located the one side that hall sensor 4 is close to rotor 2, the pole pair number of magnetic ring 6 corresponds with the magnetic pole of rotor 2, mount 3 passes through bolt and shell 1 fixed connection, reduced the area of direct contact between them, thereby reduced the heat transfer between the two, open movable hole 10 in the middle of the mount 3, movable hole 10 both sides stack into and are equipped with the screw hole, the mounting hole 14 on the hall sensor 4 passes through the screw bolt and is connected with the screw hole on the mount 3, hall sensor 4's position and size are corresponding with movable hole 10 this moment, hall sensor 4 and the contact part of mount 3 are only are the mounting hole 14 department, consequently, both area of contact is less, thereby the heat transfer between the two, make hall sensor 4 and the shell 1 and the heat transfer between the motor have reduced, when the hall sensor 4 and the motor is less in service life-span, and the heat sensor 4 has been used accurately located, and the sensor 4 has improved.

The fixing frame 3 is connected with the shell 1 through bolts, the Hall sensor 4 is connected with the fixing frame 3 through bolts, and the Hall sensor 4 is embedded between the stator and the shell relative to the Hall sensor, so that the motor can be assembled and disassembled more simply by adopting a mode of externally arranging the Hall sensor 4 through bolts, and the motor is convenient to process.

Be equipped with strengthening rib 8 on the mount 3, the strengthening rib 8 becomes 90 and distributes in proper order along the round, is equipped with louvre 9 between the strengthening rib 8, and louvre 9 is fan-shaped, has seted up movable hole 10 in the middle of the mount 3, and movable hole 10 one side is equipped with positioning groove 11, and strengthening rib 8 makes mount 3 be difficult for the deformation, can improve the stability of motor, louvre 9 and outside intercommunication can give off the heat that the motor inside produced.

The hall sensor 4 one side is equipped with location protruding head 12, location protruding head 12's position size and positioning groove 11 are corresponding, the bilateral symmetry of 90 degrees with location protruding head 12 on the hall sensor 4 is equipped with mounting hole 14, mounting hole 14 passes through bolt fixed connection at mount 3, be equipped with in the middle of the hall sensor 4 and be equilateral triangle arrangement's fixed orifices 13, location protruding head 12 and positioning groove 11 correspond, make hall sensor 4 can not upside down the installation when the installation, fixed orifices 13 are equilateral triangle arrangement can fix a position hall sensor 4, mounting hole 14 passes through the bolt with hall sensor 4 fixed on mount 3, so make hall sensor 4 mounted position more accurate.

Working principle: the tail of the shell 1 is fixedly connected with the fixing frame 3, the middle of the fixing frame 3 is fixedly connected with the Hall sensor 4, the rotating shaft 7 is provided with the magnetic ring 6, the magnetic ring 6 is positioned on one side of the Hall sensor 4 close to the rotor 2, the pole pair number of the magnetic ring 6 corresponds to the magnetic pole of the rotor 2, the external arrangement of the Hall sensor 4 is realized, after the motor is electrified, the coil of the rotor 2 generates a magnetic field after the motor is electrified, the permanent magnet on the stator 5 is attracted to rotate, the rotating shaft 7 rotates along with the rotor 2 to drive the magnetic ring 6 to rotate, the magnetic pole of the magnetic ring 6 corresponds to the magnetic pole of the rotor 2, the rotation of the magnetic ring 6 is under the induction of the Hall element of the Hall sensor 4, and the Hall sensor 4 controls the commutation of current in the coil of the rotor 2, so as to control the operation of the motor;

the fixing frame 3 is fixedly connected with the shell 1 through bolts, so that the direct contact area between the fixing frame 3 and the shell is reduced, the heat transfer between the fixing frame 3 is reduced, the movable hole 10 is formed in the middle of the fixing frame 3, threaded holes are formed in two sides of the movable hole 10 in a stacking mode, the mounting hole 14 on the Hall sensor 4 is connected with the threaded holes on the fixing frame 3 through bolts, the position and the size of the Hall sensor 4 correspond to those of the movable hole 10 at the moment, the contact part of the Hall sensor 4 and the fixing frame 3 is only the mounting hole 14, and therefore the contact area between the Hall sensor 4 and the shell is small, the heat transfer between the Hall sensor 4 and the shell 1 is reduced, the influence of heat generated during motor operation on the Hall sensor 4 is reduced, the Hall sensor 4 is positioned accurately, and the service life of the Hall sensor 4 is prolonged;

Claims

1. The utility model provides a take hall sensor's direct current brushless motor, includes shell (1), shell (1) inner wall fixedly connected with stator (5), be equipped with rotor (2) in the middle of shell (1), fixedly connected with pivot (7) in the middle of rotor (2), its characterized in that: the motor rotor is characterized in that the tail of the shell (1) is fixedly connected with a fixing frame (3), a Hall sensor (4) is fixedly connected in the middle of the fixing frame (3), a rotating shaft (7) penetrates through the middle of the fixing frame (3) and the Hall sensor (4), the rotating shaft (7) is provided with a magnetic ring (6), and the magnetic ring (6) is located on one side, close to the rotor (2), of the Hall sensor (4).

2. The brushless dc motor with hall sensor according to claim 1, wherein: the pole pair number of the magnetic ring (6) corresponds to the magnetic pole of the rotor (2).

3. The brushless dc motor with hall sensor according to claim 1, wherein: the fixing frame (3) is provided with reinforcing ribs (8), and the reinforcing ribs (8) are distributed along a round surface in sequence at 90 degrees.

4. A brushless dc motor with hall sensors according to claim 3, wherein: and heat dissipation holes (9) are formed between the reinforcing ribs (8), and the heat dissipation holes (9) are fan-shaped.

5. The brushless dc motor with hall sensor according to claim 4, wherein: a movable hole (10) is formed in the middle of the fixing frame (3), and a positioning groove (11) is formed in one side of the movable hole (10).

6. The hall sensor-equipped dc brushless motor according to claim 1 or 5, wherein: one side of the Hall sensor (4) is provided with a positioning raised head (12), and the position of the positioning raised head (12) corresponds to the positioning groove (11).

7. The brushless dc motor with hall sensor according to claim 6, wherein: the Hall sensor (4) is symmetrically provided with mounting holes (14) on two sides which are 90 degrees away from the positioning raised heads (12), and the mounting holes (14) are fixedly connected to the fixing frame (3) through bolts.

8. The hall sensor direct current brushless motor according to claim 7, wherein: the middle of the Hall sensor (4) is provided with a fixing hole (13) which is arranged in an equilateral triangle shape.