An auxiliary tool for installing magnetic steel in a permanent magnet AC motor rotor

Abstract

The present invention discloses an auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor, comprising an inner ring and an outer ring, the inner ring being a rotor magnetic steel mounting ring, the inner ring being nested in the outer ring and being concentrically arranged with the inner ring and the outer ring, a plurality of inserts being evenly arranged between the inner ring and the outer ring, the inserts dividing the annular area between the inner ring and the outer ring into a plurality of equal areas, the equal areas being magnetic steel mounting areas, a plurality of magnetic steel and non-magnetic modules being arranged in each area, the magnetic steel being adhered to the outer circle of the inner ring with glue after installation, the magnetic steel and the non-magnetic modules being equal in size and shape and being distributed at intervals, an arc-shaped pressing block being provided between the magnetic steel and the non-magnetic module and the outer ring, the arc-shaped pressing block being in contact with the magnetic steel and the outer ring, a plurality of threaded holes being provided on the wall of the outer ring at positions corresponding one to the arc-shaped pressing blocks, the arc-shaped pressing block pressing the magnetic steel or the non-magnetic module under the action of an adjusting screw passing through the threaded hole.

Description

Technical Field

[0001] The invention relates to an auxiliary tool for installing magnetic steel in a permanent magnet AC motor rotor. Background Art

[0002] The most common definition of magnet is Alnico. Magnets are composed of several strong, hard metals, such as iron, aluminum, nickel, cobalt, and sometimes copper, niobium, and tantalum, to create ultra-hard permanent magnets. Different metal compositions result in different magnetic properties and, consequently, applications. Magnets are primarily used in various fields, including sensors, instruments, electronics, electromechanics, medical treatment, education, automotive, aviation, and military technology.

[0003] The rotor of a permanent magnet AC motor consists of a fixed number of permanent magnets embedded on or within the core. These magnets are typically made of rare earth permanent magnets, such as neodymium iron boron, with high coercivity and high permeability. The function of these rotor permanent magnets is similar to that of permanent magnets used in brushless DC motors: to establish a sufficient magnetic field in the motor's air gap. The difference is that the permanent magnets in brushless DC motors are mounted on the rotor, while those in brushless motors are mounted on the stator.

[0004] Due to the interaction between the attractive force and the repulsive force between the magnets, it is extremely inconvenient to install the magnets on the rotor. Therefore, an auxiliary tooling is currently used to facilitate the installation of the magnets. Summary of the Invention

[0005] The purpose of the present invention is to solve the above deficiencies in the prior art and to provide an auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor.

[0006] The outer ring is provided with a plurality of threaded holes corresponding to the positions of the threaded holes and the outer ring, and the threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring, and the plurality of threaded holes are provided on the wall of the outer ring.

[0007] As a further improvement, the insert is made of stainless steel, which has high strength and is non-magnetic, making it easy to remove the insert after the magnetic steel is installed.

[0008] As a further improvement, corresponding slots are provided on the outer wall of the inner ring and the inner wall of the outer ring, and the inserts are connected to the inner ring and the outer ring by inserting into the slots. This connection method is very convenient for inserting and withdrawing the inserts, and has a simple structure, reducing material, processing and installation costs.

[0009] As a further improvement, the number of the inserts is 10, which divide the annular area between the inner ring and the outer ring into 10 equal areas. The sum of the number of magnetic steels and non-magnetic modules in each equal area is 6. This method of separating the areas ensures installation accuracy while reducing operational difficulty.

[0010] As a further improvement, a clamping end cover is provided on the left and right end faces of the inner ring and the outer ring to make the surfaces of each magnetic steel flush. The clamping end cover is connected to the inner ring and the outer ring by bolts. The device is convenient and simple, reducing material, processing and installation costs.

[0011] Beneficial effects:

[0012] The present invention is cleverly designed, using stainless steel inserts to divide the annular installation area between the inner ring and the outer ring into 10 areas, which are then symmetrically installed in the areas. This installation method greatly reduces the difficulty of operation while ensuring installation accuracy. Magnets and non-magnetic modules are installed at intervals in each installation area, so that both sides of the magnet are non-magnetic modules to reduce the influence of magnetic force during installation. During installation, the bottom of the magnet is bonded to the inner ring with glue and tightened with an arc-shaped pressure block and an adjusting screw. The magnets are separated by non-magnetic modules, and the surfaces of each group of magnets are made flush with a tightening end cap. After the magnet is bonded and tightened to the inner ring, the non-magnetic module is removed and replaced with another group of magnets with opposite polarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the overall structure of an auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor;

[0014] Figure 2 It is a schematic diagram of the connection structure between the inner ring and the outer ring;

[0015] 1. Outer ring 2. Inner ring 3. Insert 4. Magnet 5. Non-magnetic module 6. Arc-shaped pressure block 7. Adjustment screw 8. Threaded hole DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0017] like Figures 1-2As shown, an auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor includes an outer ring 1, an inner ring 2, an insert 3, a magnetic steel 4, a non-magnetic module 5, an arc-shaped pressing block 6, an adjusting screw 7 and a threaded hole 8.

[0018] An auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor, comprising an inner ring 2 and an outer ring 1, wherein the inner ring 2 is a mounting ring for the rotor magnetic steel 4, the inner ring 2 is nested in the outer ring 1 and is concentric with the inner ring 2 and the outer ring 1, and a plurality of inserts 3 are evenly arranged between the inner ring 2 and the outer ring 1, the inserts 3 divide the annular area between the inner ring 2 and the outer ring 1 into a plurality of equal areas, the equal areas being the mounting areas for the magnetic steel 4, and each area being provided with a plurality of magnetic steels 4 and an equal number of inserts 3. After the magnetic module 5 and the magnetic steel 4 are installed, they are adhered to the outer circle of the inner ring 2 with glue. The size and shape of the magnetic steel 4 and the non-magnetic module 5 are equal and spaced apart. An arc-shaped pressing block 6 is provided between the magnetic steel 4 and the non-magnetic module 5 and the outer ring 1. The arc-shaped pressing block 6 fits both the magnetic steel 4 and the outer ring 1. The wall of the outer ring 1 is provided with several threaded holes 8 corresponding one-to-one to the arc-shaped pressing blocks 6. The arc-shaped pressing block 6 presses the magnetic steel 4 or the non-magnetic module 5 under the action of the adjusting screw 7 passing through the threaded hole 8.

[0019] The insert 3 is made of stainless steel, which has high strength and is non-magnetic, making it easy to remove the insert 3 after the magnetic steel 4 is installed.

[0020] Among them, corresponding slots are provided on the outer wall of the inner ring 2 and the inner wall of the outer ring 1, and the insert 3 is connected to the inner ring 2 and the outer ring 1 by inserting into the slot. This connection method is very convenient for inserting and withdrawing the insert 3, and has a simple structure, reducing material, processing and installation costs.

[0021] Among them, the number of the inserts 3 is 10, and the inserts 3 divide the annular area between the inner ring 2 and the outer ring 1 into 10 equal areas. The sum of the number of magnetic steels 4 and non-magnetic modules 5 in each equal area is 3. This method of dividing the areas ensures installation accuracy while reducing the difficulty of operation.

[0022] Among them, a clamping end cover (not shown in the figure) is provided on the left and right end faces of the inner ring 2 and the outer ring 1 to make the surface of each magnetic steel 4 flush. The clamping end cover (not shown in the figure) is connected to the inner ring 2 and the outer ring 1 by bolts. The device is convenient and simple, reducing material, processing and installation costs.

[0023] During use, a stainless steel insert 3 is used to divide the annular installation area between the inner ring 2 and the outer ring 1 into 10 areas, and then the areas are installed one by one. This installation method greatly reduces the difficulty of operation while ensuring the installation accuracy. The magnets 4 and non-magnetic modules 5 are installed at intervals in each installation area, so that both sides of the magnet 4 are non-magnetic modules 5 to reduce the influence of magnetic force during the installation process. During installation, the bottom of the magnet 4 is bonded to the inner ring 2 with glue and is tightened with an arc-shaped pressure block 6 and an adjusting screw 7. The magnets 4 are separated by non-magnetic modules 5, and the surfaces of each group of magnets 4 are made flush with the tightening end caps. After the magnet 4 is bonded and tightened to the inner ring 2, the non-magnetic modules 5 are removed and replaced with another group of magnets 4 with opposite polarity.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An auxiliary tool for installing magnetic steel in a permanent magnet AC motor rotor, characterized in that: It includes an inner ring and an outer ring, the inner ring is a rotor magnet mounting ring, the inner ring is nested in the outer ring and is concentrically arranged with the inner ring and the outer ring, and a number of inserts are evenly arranged between the inner ring and the outer ring, and the inserts divide the annular area between the inner ring and the outer ring into a number of equal areas, and the equal areas are magnet mounting areas, and a number of magnets and non-magnetic modules are arranged in each area. After the magnet is installed, it is adhered to the outer circle of the inner ring with glue, and the size and shape of the magnets and non-magnetic modules are equal and spaced apart, and an arc-shaped pressing block is provided between the magnet and the non-magnetic module and the outer ring, and the arc-shaped pressing block is fitted with the magnet and the outer ring, and a number of threaded holes corresponding to the arc-shaped pressing blocks are provided on the wall of the outer ring, and the arc-shaped pressing block presses the magnet or the non-magnetic module under the action of the adjusting screw passing through the threaded hole.

2. The auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor according to claim 1, characterized in that: The material of the insert is stainless steel.

3. The auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor according to claim 1, characterized in that: Corresponding slots are provided on the outer wall of the inner ring and the inner wall of the outer ring, and the inserts are connected to the inner ring and the outer ring by inserting into the slots.

4. The auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor according to claim 1, characterized in that: The number of the inserts is 10, and the inserts divide the annular area between the inner ring and the outer ring into 10 equal areas. The sum of the number of magnetic steels and non-magnetic modules in each equal area is 6.

5. The auxiliary tooling for installing magnetic steel in a permanent magnet AC motor rotor according to claim 1, characterized in that: A compression end cap is provided on the left and right end faces of the inner ring and the outer ring respectively for making the surfaces of the magnetic steels flush. The compression end cap is connected to the inner ring and the outer ring by bolts.

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