Magnetizing device of magnetic ring

Abstract

The utility model relates to the technical field of motors, in particular to a magnetizing device of a magnetic ring, which comprises a magnetizing jig, a rotor placing groove is arranged in the magnetizing jig, a rotor assembly is placed in the rotor placing groove, and the rotor assembly can rotate in the rotor placing groove. Square magnets are arranged on the periphery of the rotor placing groove, and a pre-magnetized main magnet and a non-magnetized induction magnetic ring are arranged on the rotor assembly. Compared with the prior art, the magnetizing device of the magnetic ring has the advantages that the induction magnetic ring is firstly assembled into the assembly, the magnetizing jig is automatically aligned and then magnetized, the problem that the magnetic poles of the induction magnetic ring and the rotor main magnet correspond to each other and have angular deviation can be effectively solved, the workload is reduced, the production efficiency is remarkably improved, and the production cost is reduced. And various performance index problems of the motor can be solved, and the competitiveness of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a magnet ring magnetizing device. BACKGROUND

[0002] Motor as daily life common machinery, it contains the stator that has coil and provides directional magnetic field to rotor, also contains the rotor that has permanent magnet, however, the rotor of permanent magnet especially the rotor of rare earth neodymium iron boron is high in price, the magnet of inductive part all will select to use bonded magnet ring to replace.

[0003] The prior art method is to use magnetic card to check whether the magnetic pole of the inductive magnet ring magnetized well corresponds to the main magnet before assembling, this method has the problem of magnetic field angle deviation, which causes the motor forward and reverse current inconsistency, commutation advance or lag, and affects the motor efficiency and other problems. UTILITY MODEL CONTENTS

[0004] In order to overcome the above problems, the utility model provides a magnet ring magnetizing device which can effectively solve the above problems.

[0005] The utility model solves the above technical problem and provides a technical scheme of a magnet ring magnetizing device, which comprises a magnetizing jig, a rotor placing groove is arranged in the magnetizing jig, a rotor assembly is placed in the rotor placing groove, and the rotor assembly can rotate in the rotor placing groove; square magnets are arranged around the rotor placing groove, and the rotor assembly is provided with a main magnet magnetized in advance and an inductive magnet ring not magnetized.

[0006] Preferably, the rotor assembly comprises a shaft and a balance block, the shaft is bonded and assembled with the magnetized main magnet and the balance block using glue, and the inductive magnet ring not magnetized is placed on the balance block in clearance fit with the shaft.

[0007] Preferably, the square magnets are parallel to the magnetizing end face of the magnetizing jig, and the magnetic field direction of the square magnets is parallel to the magnetizing direction.

[0008] Preferably, the magnetizing jig is provided with first, second, third and fourth magnetic grooves, and the first, second, third and fourth magnetic grooves are respectively arranged around the rotor placing groove.

[0009] Preferably, the square magnets comprise first, second, third and fourth square magnets, the first square magnet is inserted into the first magnetic groove, the second square magnet is inserted into the second magnetic groove, the third square magnet is inserted into the third magnetic groove, and the fourth square magnet is inserted into the fourth magnetic groove.

[0010] Preferably, the bottom of the rotor placing groove is provided with a support plane, the support plane is provided with an axle slot, the axle is inserted into the axle slot, and the axle can rotate in the axle slot.

[0011] Preferably, the material of the magnetizing jig can be stainless steel or a non-magnetic and easy-to-process material.

[0012] Preferably, the magnetizing direction is parallel to the end face of the magnetizing jig, and the end face of the magnetizing jig is marked with the N pole or the S pole of the corresponding square magnet inside.

[0013] Preferably, the first magnetic slot and the second magnetic slot are parallel, the third magnetic slot and the fourth magnetic slot are parallel, and the first magnetic slot and the third magnetic slot are perpendicular.

[0014] Preferably, the first magnetic slot, the second magnetic slot, the third magnetic slot and the fourth magnetic slot are respectively equal in distance from the rotor placing groove.

[0015] Compared with the prior art, the magnetizing device of the magnetic ring can effectively solve the problem of angular deviation of the magnetic ring and the rotor main magnet pole, not only reduces the workload, significantly improves the production efficiency, but also solves the problem of motor performance indicators, and improves the competitiveness of the product. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a whole view of the magnetizing device of the magnetic ring of the utility model;

[0017] Fig. 2 It is an exploded view of the magnetizing device of the magnetic ring of the utility model;

[0018] Fig. 3 It is a front view of the magnetizing jig of the magnetizing device of the magnetic ring of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail below in combination with the drawings and the implementation examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only relative positions on the specified view, not absolute positions.

[0021] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0022] Please refer to Figs. 1 to 3 The magnet ring magnetizing device of the present application is a magnet ring magnetizing jig with automatic alignment function, comprising a magnetizing jig 10, a rotor placing groove 18 is arranged in the magnetizing jig 10, a rotor assembly 30 is placed in the rotor placing groove 18, and the rotor assembly 30 can rotate in the rotor placing groove 18.

[0023] A square magnet is arranged around the rotor placing groove 18, and a pre-magnetized main magnet 32 and an unmagnetized induction magnetic ring 34 are arranged on the rotor assembly 30.

[0024] The magnet ring magnetizing device of the present application utilizes the characteristics of the main magnet 32 on the rotor assembly 30 and the square magnet in the magnetizing jig 10 containing the same polarity repulsion and different polarity attraction to form automatic alignment, and then the induction magnetic ring 34 is parallel magnetized according to the magnetizing direction, which can ensure that the magnetic poles of the induction magnetic ring 34 and the magnetic poles of the main magnet 32 correspond completely.

[0025] The magnet ring magnetizing device of the present application uses the square magnet for parallel magnetization to be loaded into the magnetizing jig 10, which can form a stable magnetic field to position the position of the rotor assembly 30, thereby ensuring the correct magnetizing angle of the induction magnetic ring 34.

[0026] The rotor assembly 30 comprises a shaft 31 and a balance block 33, the shaft 31 is adhesively assembled with the magnetized main magnet 32 and the balance block 33, the unmagnetized induction magnetic ring 34 is gap-fitted on the balance block 33 with the shaft 31, and then the whole is placed in the magnetizing jig 10 containing the square magnet. The fitting gap of the induction magnetic ring 34 and the shaft 31 cannot be too large, and the single side is 0.015-0.025mm, so as to avoid the induction magnetic ring 34 from falling off naturally due to too large gap.

[0027] The square magnet is parallel to the magnetizing end face of the magnetizing jig 10, and the magnetizing jig 10 is machined to have a flatness of 0.02, so as to ensure that the magnetic field direction of the square magnet is parallel to the magnetizing direction A.

[0028] The magnet charging fixture 10 is provided with a first magnetic slot 11, a second magnetic slot 12, a third magnetic slot 13 and a fourth magnetic slot 14, which are respectively located around the rotor placing slot 18.

[0029] The square magnet includes a first square magnet 21, a second square magnet 22, a third square magnet 23 and a fourth square magnet 24, the first square magnet 21 is inserted into the first magnetic slot 11, the second square magnet 22 is inserted into the second magnetic slot 12, the third square magnet 23 is inserted into the third magnetic slot 13, and the fourth square magnet 24 is inserted into the fourth magnetic slot 14. The square magnet is matched with the corresponding magnetic slot with a single side gap of 0.05mm, and is bonded together by glue. The magnetic poles of the corresponding square magnet in the end face of the magnet charging fixture 10 are confirmed, and the marks are made on the end face. The direction of the fixture magnetization is confirmed, and the fixture can be put into the magnetizing machine, thereby forming a magnetic ring magnetizing fixture with automatic alignment function.

[0030] The first magnetic slot 11 and the second magnetic slot 12 are parallel, the third magnetic slot 13 and the fourth magnetic slot 14 are parallel, and the first magnetic slot 11 and the third magnetic slot 13 are perpendicular.

[0031] The first magnetic slot 11, the second magnetic slot 12, the third magnetic slot 13 and the fourth magnetic slot 14 are respectively equal in distance from the rotor placing slot 18.

[0032] The bottom of the rotor placing slot 18 is provided with a support plane, the support plane is provided with a shaft slot 19, the shaft 31 is inserted into the shaft slot 19, and the shaft 31 can rotate in the shaft slot 19.

[0033] The magnet charging fixture 10 is designed according to the size of the rotor assembly 30, the inner diameter of the rotor placing slot 18 must be greater than the outer diameter of the rotor assembly 30, so as to ensure that the rotor assembly 30 can rotate in the fixture, thereby realizing the automatic alignment function of the magnet charging fixture 10. The inner wall of the rotor placing slot 18 is provided with a single side gap of 0.5mm from the periphery of the rotor assembly 30, and the bottom is a plane on which the rotor is placed, so that the rotor remains in a vertical state and avoids deviation of the magnetizing angle.

[0034] The material of the magnet charging fixture 10 can be stainless steel or other materials that are not magnetically conductive and easy to process, the purpose is to prevent the magnetic conductivity of the material from affecting the mutual interaction force of the magnets and changing the magnetic circuit, and the easy-to-process material is used to ensure the flatness and roughness of the whole device and reduce the influence of the machining precision on the automatic alignment precision.

[0035] The magnetizing direction A is parallel to the end face of the magnet charging fixture 10, and the N pole or S pole of the corresponding square magnet inside the magnet charging fixture 10 is marked on the end face, so as to ensure that the magnetizing direction is completely correct.

[0036] When the rotor assembly 30 is loaded into the magnetizing fixture 10 with square magnets, the main magnets 32 on the rotor assembly 30 and the square magnets in the magnetizing fixture 10 repel each other due to the same polarity and attract each other due to the different polarity, so that the rotor is automatically aligned and rotated to a fixed position and kept stable.

[0037] Compared with the prior art, the magnetizing fixture 10 of the magnet ring magnetizing device is simple and reasonable in structure, firm and reliable, the internal structure can be completed by simple machining process, the internal positioning boss is provided, the assembly size is ensured to be accurate, the magnet ring magnetizing device is convenient and fast to use, connection is compact, and the process efficiency of the motor is significantly improved.

[0038] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any modification, equivalent replacement and improvement within the concept of the utility model should be included in the patent protection range of the utility model.

Claims

1. A magnetizing device for magnetizing a magnetic ring, characterized in that, The magnet charging tool is internally provided with a rotor placing groove, and the rotor placing groove is internally placed with a rotor assembly, and the rotor assembly can rotate in the rotor placing groove. The rotor placing groove is provided with square magnets around, and the rotor assembly is provided with a pre-charged main magnet and an un-charged induction magnetic ring.

2. The magnetizing apparatus of a magnetic ring as claimed in claim 1, wherein The rotor assembly comprises a shaft and a balance block, the shaft is bonded and assembled with the charged main magnet and the balance block by using glue, and the un-charged induction magnetic ring is gap-fitted on the balance block with the shaft.

3. The magnetizing apparatus of claim 1, wherein the magnetizing apparatus comprises a magnetizing head having a plurality of magnetizing coils, and the magnetizing head is movable along the axis of the magnetic ring. The square magnets are parallel to the magnet charging end face of the magnet charging tool, and the magnetic field direction of the square magnets is parallel to the magnet charging direction.

4. The magnetizing apparatus for magnetic rings as claimed in claim 1, wherein The magnet charging tool is internally provided with a first magnetic groove, a second magnetic groove, a third magnetic groove and a fourth magnetic groove, and the first magnetic groove, the second magnetic groove, the third magnetic groove and the fourth magnetic groove are respectively located around the rotor placing groove.

5. The apparatus for magnetizing a magnetic ring as claimed in claim 4, wherein The square magnets comprise a first square magnet, a second square magnet, a third square magnet and a fourth square magnet, the first square magnet is inserted into the first magnetic groove, the second square magnet is inserted into the second magnetic groove, the third square magnet is inserted into the third magnetic groove, and the fourth square magnet is inserted into the fourth magnetic groove.

6. The apparatus for magnetizing magnetic rings as claimed in claim 2, wherein The bottom of the rotor placing groove is provided with a support plane, the support plane is provided with a shaft groove, the shaft is inserted into the shaft groove, and the shaft can rotate in the shaft groove.

7. The magnetic ring magnetizing apparatus of claim 1, wherein, The material of the magnet charging tool can be stainless steel or non-magnetic and easy-to-process material.

8. The apparatus for magnetizing a magnetic ring as claimed in claim 3, wherein The magnet charging direction is parallel to the end face of the magnet charging tool, and the N-pole or S-pole of the corresponding square magnet inside the magnet charging tool is marked on the end face of the magnet charging tool.

9. The magnetizing apparatus of claim 5, wherein the magnetizing apparatus comprises a magnetizing head having a plurality of magnetizing coils, and the magnetizing head is movable along the axis of the magnetic ring. The first magnetic groove and the second magnetic groove are parallel, the third magnetic groove and the fourth magnetic groove are parallel, and the first magnetic groove and the third magnetic groove are perpendicular.

10. The apparatus for magnetizing a magnetic ring as claimed in claim 9, wherein The first magnetic groove, the second magnetic groove, the third magnetic groove and the fourth magnetic groove are respectively equal to the distance of the rotor placing groove.

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