Motor induction magnetic ring magnetizing device

Abstract

The utility model belongs to the technical field of magnetizing devices, and particularly relates to a magnetizing device for a motor induction magnetic ring. A motor induction magnetic ring magnetizing device comprises a base and a magnetizing iron core arranged on the base, a containing hole which extends in the axial direction and is used for containing a motor rotor is formed in the center of the magnetizing iron core, the base is provided with a positioning part extending in the axial direction, and the magnetizing iron core is partially arranged on the positioning part in a sleeving mode. The positioning part is provided with a plurality of positioning blocks which are annularly and uniformly arranged at intervals, the positioning blocks extend into the placing holes, and the arrangement mode of the positioning blocks is the same as the arrangement mode of magnetic steel embedding grooves of the motor rotor; a plurality of tooth parts extending outwards in the radial direction are arranged on the circumferential outer wall of the magnetizing iron core, the tooth parts correspond to the positioning blocks one to one, and a coil is wound on each tooth part. The utility model has the advantage of ensuring the one-to-one correspondence of the polarity of the induction magnetic ring and the embedded magnetic steel of the motor rotor.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetizing devices, and particularly relates to a magnetizing device for an induction magnetic ring of a motor. Background Art

[0002] The commonly used Hall induction method for motors usually uses the main magnet of the motor for induction or a separate induction magnetic ring is set. Setting a separate induction magnetic ring can reduce the usage of the main magnet of the motor, reduce the material cost of the motor, and when the main magnet is an embedded magnet, it can better plan the design of Hall induction and ensure the induction accuracy. The pole setting of the induction magnetic ring needs to correspond one by one to the polarity of the embedded magnet of the motor rotor. Usually, the poles of the induction magnetic ring need to be magnetized through a device. For example, Chinese Patent No. 202023248806.2 discloses a multi-pole magnetic ring water-cooled magnetizing device. In this patent, the induction magnetic ring workpiece is placed on the magnetic ring sleeved rod, and the induction magnetic ring workpiece is magnetized through the magnetizing core. However, when magnetizing the induction magnetic ring of a motor with an embedded magnet, it is difficult to ensure that after magnetization, the pole setting of the induction magnetic ring corresponds one by one to the polarity of the embedded magnet of the motor rotor. Content of the Utility Model

[0003] The purpose of the utility model is to provide a magnetizing device for an induction magnetic ring of a motor that ensures the poles of the induction magnetic ring correspond one by one to the polarity of the embedded magnet of the motor rotor.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A magnetizing device for an induction magnetic ring of a motor includes a base and a magnetizing core arranged on the base. A placement hole extending along the axial direction and used for placing the motor rotor is provided at the center of the magnetizing core. The base is provided with a positioning portion extending axially, and part of the magnetizing core is sleeved on the positioning portion. A plurality of positioning blocks evenly spaced along the ring are provided on the positioning portion, and the positioning blocks extend into the placement hole. The arrangement mode of the positioning blocks is the same as the arrangement mode of the magnet steel embedding grooves of the motor rotor. A plurality of tooth portions extending radially outward are provided on the circumferential outer wall of the magnetizing core, and the tooth portions correspond one by one to the positioning blocks. A coil is wound around each tooth portion.

[0005] During the magnetizing process, the operator inserts the rotor of the motor into the placement groove of the magnetizing core, and the positioning blocks on the base extend into the magnet steel embedding grooves of the motor rotor one by one, thereby completing the circumferential positioning of the motor rotor. Then the coil is energized to magnetize the induction magnetic ring on the motor rotor, so that the poles of the induction magnetic ring correspond one by one to the polarity of the embedded magnet of the motor rotor.

[0006] Among them, the way the coil is wound around the tooth part is that the winding directions of the coils of two adjacent tooth parts are opposite, so that the magnetic fields generated by two adjacent coils are opposite. Or the winding ways of the coils are the same, but the current directions in the coils are opposite.

[0007] Among them, the one-to-one correspondence between the tooth part and the positioning block means that one positioning block corresponds to one tooth part, and the symmetry axis of the tooth part and the symmetry axis of the positioning block are the same symmetry axis.

[0008] Among them, the tooth parts are also arranged at equal intervals in a ring shape on the magnetizing core.

[0009] In this solution, by arranging the layout of the positioning blocks to be the same as the layout of the magnetic steel embedding grooves of the motor rotor, and each positioning block also corresponds one-to-one to a tooth part wound with a coil, after the induction magnetic ring is magnetized, the pole distribution of the induction magnetic ring can correspond one-to-one to the polarity of the embedded magnetic steel of the motor.

[0010] Preferably, the magnetizing core is arranged in a yoke iron sleeve made of a magnetic conductive material.

[0011] By arranging the yoke iron sleeve made of a magnetic conductive material, magnetic leakage can be reduced to increase the magnetizing efficiency.

[0012] Preferably, the yoke iron sleeve is arranged in a cooling sleeve made of a magnetic conductive material, and a chamber for charging and discharging circulating water is provided between the cooling sleeve and the yoke iron sleeve.

[0013] The cooling sleeve made of a magnetic conductive material can further reduce magnetic leakage and increase the magnetizing efficiency. At the same time, the cooling sleeve can cool down the whole magnetizing process.

[0014] Preferably, the circumferential inner wall of the yoke iron sleeve is in contact and cooperation with the tooth part of the magnetizing core, and a cooperating groove and a cooperating protrusion extending into the cooperating groove are provided between the circumferential inner wall of the yoke iron sleeve and the tooth part.

[0015] The cooperation between the yoke iron sleeve and the tooth part through the cooperating groove and the cooperating protrusion can facilitate the disassembly and assembly between the two, and at the same time can increase the contact area between the two to improve the magnetizing effect.

[0016] Preferably, the magnetizing core is composed of several magnetic conductive sheets stacked along the axial direction, and a snap point and a snap groove are respectively provided at both axial ends of the magnetic conductive sheet. When two adjacent magnetic conductive sheets are in contact, the snap point and the snap groove cooperate with each other.

[0017] By providing the snap point and the snap groove, it can be ensured that the cooperation of the magnetic conductive sheets will not be offset.

[0018] Preferably, an annular insulating cover plate is arranged at one axial end of the magnetizing core. A first avoidance groove for avoiding the coil is arranged at one end of the insulating cover plate facing the magnetizing core. An axially extending insulating part is further arranged at one end of the insulating cover plate facing the magnetizing core. The insulating part is located between the yoke sleeve and the magnetizing core and is used for pressing the coil on the tooth part.

[0019] By arranging the insulating cover plate, the coil can be isolated to prevent the operator from getting an electric shock. The first avoidance groove can avoid the coil at the upper end of the magnetizing core. At the same time, the insulating part located between the yoke sleeve and the magnetizing core can press and fix the coil on the tooth part to prevent the coil from shaking after being energized.

[0020] Preferably, an insulating block is sleeved on the circumferential outer side of the positioning part. The insulating block is located between the base and the magnetizing core. A second avoidance groove for avoiding the coil is arranged at the end of the insulating block.

[0021] By arranging the insulating block, the magnetizing core and the base can be spaced apart. At the same time, the second avoidance groove for avoiding the coil arranged at the end of the insulating block can ensure the levelness of the magnetizing core while restricting the shaking of the coil, thereby ensuring the stability of the magnetic field of the coil.

[0022] Preferably, both the base and the magnetizing core are of split structures and are detachably fixed to each other.

[0023] There are four or eight magnetic steel embedding grooves on some motor rotors, etc. The induction magnetic ring of different motors can be magnetized by replacing the base and the magnetizing core.

[0024] The utility model has the advantage of ensuring that the polarities of the induction magnetic ring and the embedded magnetic steel of the motor rotor correspond one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a cross-sectional view of the utility model.

[0026] Figure 2 is a top view of the utility model after removing the first insulating cover at the upper end.

[0027] Figure 3 is a structural schematic diagram of the magnetizing core.

[0028] Figure 4 is a structural schematic diagram of the rotor assembly.

[0029] Reference numerals: 1, base; 11, positioning portion; 12, positioning block; 2, magnetizing core; 21, tooth portion; 22, mating projection; 23, snap point; 24, placement hole; 3, yoke sleeve; 4, cooling sleeve; 41, chamber; 42, water inlet; 43, water outlet; 5, coil; 51, incoming wire; 52, outgoing wire; 6, insulating cover plate; 7, insulating block; 100, magnet steel embedding groove; 200, induction magnetic ring. Detailed implementation manner

[0030] The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] As Figure 1 shown, this embodiment discloses a magnetizing device for an induction magnetic ring of a motor, including a base 1. A positioning portion 11 extending axially upward is provided at the center of the base 1. An insulating block 7 and a magnetizing core 2 are sleeved on the circumferential outer side of the positioning portion 11. The magnetizing core 2 is supported on the upper side of the insulating block 7. The magnetizing core 2 is provided with a placement hole 24 axially penetrating through and used for placing a rotor assembly. The upper end of the positioning portion 11 extends into the placement hole 24.

[0032] As Figures 1 to 4 shown, the positioning portion 11 is provided with a positioning groove, and a positioning block 12 is arranged in the positioning groove. The positioning block 12 extends upward beyond the upper end of the positioning portion 11. The number of the positioning blocks 12 is four, and they are evenly spaced in a ring shape. The arrangement mode of the positioning blocks 12 is the same as the arrangement mode of the magnet steel embedding grooves 100 of the rotor assembly. Four radially outward extending tooth portions 21 are provided on the circumferential outer wall of the magnetizing core 2. The tooth portions 21 correspond to the positioning blocks 12 one by one. Each tooth portion 21 is wound with a coil 5. The coil 5 is wound back and forth from the upper end to the lower end of the tooth portion 21. The magnetizing core 2 is composed of a plurality of stacked magnetic conductive sheets. Snap points 23 and snap grooves (not shown in the figure) are respectively provided at the axial two ends of the magnetic conductive sheets. When two adjacent magnetic conductive sheets are in contact, the snap points 23 and the snap grooves cooperate with each other.

[0033] As Figures 1 to 3 shown, a yoke sleeve 3 made of a magnetic conductive material is further supported on the insulating block 7. The yoke sleeve 3 is sleeved on the circumferential outer side of the magnetizing core 2. The tooth portion 21 is provided with a mating projection 22 extending axially and protruding radially outward. The inner wall of the yoke sleeve 3 is provided with a mating groove that mates with the mating projection 22. A cooling sleeve 4 made of a magnetic conductive material is sleeved on the outer side of the yoke sleeve 3. A ring-shaped water-circulatable chamber 41 is provided between the cooling sleeve 4 and the yoke sleeve 3. The cooling sleeve 4 is provided with a water inlet 42 and a water outlet 43 communicating with the chamber 41.

[0034] As Figure 1As shown, the axial height of the yoke sleeve 3 is higher than that of the magnetizing core 2. An annular insulating cover plate 6 is arranged at one axial end of the magnetizing core 2. An axially extending insulating portion (not shown in the figure) is provided at one end of the insulating cover plate 6 facing the magnetizing core 2. The insulating portion is located between the yoke sleeve 3 and the magnetizing core 2 and is used to press the coil 5 on the tooth portion 21. The incoming wire 51 and the outgoing wire 52 of the coil 5 pass through the yoke sleeve 3 and the cooling sleeve 4. A first avoidance groove (not shown in the figure) for avoiding the coil is provided at the lower end of the insulating cover plate 6. A second avoidance groove (not shown in the figure) for avoiding the coil is provided at the upper end of the insulating block 7.

[0035] As Figure 1 shown, the base 1, the insulating block 7 and the yoke sleeve 3 are detachably fixed by connecting nails, and the magnetizing core 2 and the base 1 are detachably fixed by sleeving.

[0036] During the actual operation process, the operator inserts the rotor assembly into the placement hole 24, so that the magnet steel embedding groove 100 of the rotor assembly is inserted and matched with the positioning block 12. At this time, the circumferential position of the rotor assembly is limited. The cooling sleeve is filled with water and the coil 5 is energized to magnetize the induction magnetic ring 200. After the magnetization of the induction magnetic ring 200 is completed.

Claims

1. A motor induction magnetic ring magnetizing device, comprising a base and a magnetizing core arranged on the base, characterized in that: A placement hole extending in the axial direction and used for placing the motor rotor is provided at the center of the magnet-filled core, the base is provided with an axially extending positioning portion, the magnet-filled core portion is sleeved on the positioning portion, the positioning portion is provided with a plurality of positioning blocks evenly spaced along a ring shape, the positioning blocks extend into the placement hole, and the arrangement of the positioning blocks is the same as the arrangement of the magnetic steel embedding grooves of the motor rotor; a plurality of teeth extending radially outward are provided on the circumferential outer wall of the magnet-filled core, the teeth correspond one-to-one to the positioning blocks, and a coil is wound on each tooth.

2. The motor induction magnetic ring magnetizing device according to claim 1, characterized in that: The magnetized core is arranged in a yoke sleeve made of magnetic conductive material.

3. The motor induction magnetic ring magnetizing device according to claim 2, characterized in that: The yoke iron sleeve is arranged in a cooling sleeve made of a magnetic conductive material, and a chamber for filling and discharging circulating water is arranged between the cooling sleeve and the yoke iron sleeve.

4. The motor induction magnetic ring magnetizing device according to claim 2, characterized in that: The circumferential inner wall of the yoke sleeve is in contact with and matched with the tooth portion of the magnetic core. A matching groove and a matching protrusion extending into the matching groove are provided between the circumferential inner wall of the yoke sleeve and the tooth portion.

5. The motor induction magnetic ring magnetizing device according to claim 1, 2, 3 or 4, characterized in that: The magnetic core is composed of a plurality of magnetic conductive sheets stacked in an axial direction, and buckling points and buckling grooves are respectively provided at two axial ends of the magnetic conductive sheets. When two adjacent magnetic conductive sheets are in contact, the buckling points and buckling grooves cooperate with each other.

6. The motor induction magnetic ring magnetizing device according to claim 2, characterized in that: An annular insulating cover is provided at one axial end of the magnetized core, and a first avoidance groove for avoiding the coil is provided at one end of the insulating cover facing the magnetized core; an axially extending insulating portion is also provided at one end of the insulating cover facing the magnetized core, and the insulating portion is located between the yoke sleeve and the magnetized core and is used to press the coil on the tooth portion.

7. The motor induction magnetic ring magnetizing device according to claim 1, 2, 3 or 4, characterized in that: An insulating block is sleeved on the circumferential outer side of the positioning portion, and the insulating block is located between the base and the magnetic core. A second avoidance groove for avoiding the coil is provided at the end of the insulating block.

8. The motor induction magnetic ring magnetizing device according to claim 1, 2, 3 or 4, characterized in that: The base and the magnetized core are both split structures and can be detachably fixed therebetween.

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