Surface-mounted rotor mounting structure of permanent magnet synchronous motor

Abstract

The utility model discloses a permanent magnet synchronous motor surface-mounted rotor installation structure, which comprises a rotor support, magnetic steel, a non-magnetic magnetic steel pressing strip, a rotor pressing plate and a magnetic steel assembly auxiliary plate, the magnetic steel is tile-shaped, a through hole is formed in the center of the magnetic steel, the rotor pressing plate is annular, and the outer diameter of the rotor pressing plate is larger than that of the rotor support. The magnetic steel assembling auxiliary plate is in a tile shape, two sides of one end of the magnetic steel assembling auxiliary plate extend towards two sides to be provided with fixing blocks, through holes corresponding to threaded holes in the end side of the rotor support are formed in the fixing blocks, the fixing blocks are fixed to the end side of the other end of the rotor support through screws, the section of the magnetic steel pressing strip is in an inverted trapezoid shape, and through holes are vertically formed in the magnetic steel pressing strip. At least two threaded holes are formed in the front face of the magnetic steel assembling auxiliary plate in the axial direction at intervals, and magnetic steel pressing strips are fixed to the surface of the magnetic steel assembling auxiliary plate through screws. According to the utility model, the production efficiency is high, the magnetic steel loss is small, and the motor vibration caused by non-uniform magnetic steel arrangement is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor manufacturing technical field, especially relates to a surface-mounted rotor mounting structure of permanent magnet synchronous motor. BACKGROUND

[0002] With the development of society, the automation degree of various trades and professions is higher and higher, and the application of motor is more and more, and the requirement of motor is higher and higher too. With the development of motor to big torque direction, the requirement of the fixing of magnetic steel in motor rotor is higher and higher. The arrangement of magnetic steel in motor rotor is mainly divided into surface-mounted type and built-in type. Among them, the magnetic steel of surface-mounted pole directly faces air gap, has the advantages of convenient processing and installation, but the magnetic steel directly bears the demagnetization of armature reaction, the magnetic steel of built-in pole is placed in the interior of iron core, and the processing and installation process are complex, and the leakage is big, but more magnetic steel can be placed to improve air gap flux density, reduce the quality and size of motor.

[0003] From the safety of structural design, the built-in type is adopted, the magnetic steel is not easy to fall off, and the safety is higher, but the process is complex and difficult, and the surface-mounted type is simple and convenient, so the design of many manufacturers still tends to adopt the surface-mounted type. But the surface-mounted magnetic steel adopts screw fixing, and the arrangement of magnetic steel on the circumference is uneven, which leads to large motor vibration and torque fluctuation. CONTENT OF UTILITY MODEL

[0004] In order to solve the above technical problems, the utility model provides a surface-mounted rotor mounting structure of permanent magnet synchronous motor.

[0005] The utility model is adopted the following technical scheme realizes: a surface-mounted rotor mounting structure of permanent magnet synchronous motor, including rotor support and magnetic steel, and non-magnetic magnetic steel pressing strip, rotor pressing plate and magnetic steel assembly auxiliary plate, the surface of rotor support cylinder is uniformly provided with threaded hole, the magnetic steel is tile type, the center is provided with through hole, the rotor pressing plate is circular ring, the outer diameter of rotor pressing plate is greater than the outer diameter of rotor support, and is fixed on one end side of rotor support through screw, the magnetic steel assembly auxiliary plate is tile shape, and the both sides of one end of the magnetic steel assembly auxiliary plate facing the rotor support extend to both sides and are provided with fixed blocks, the fixed blocks are provided with through holes corresponding to the threaded holes of the end side of rotor support, and are fixed on the other end side of rotor support through screw, the cross section of magnetic steel pressing strip is inverted trapezoid, and is vertically provided with through hole, and is fixed on rotor support in whole through screw, the front surface of magnetic steel assembly auxiliary plate is coplanar with the surface of rotor support cylinder, and is provided with at least two threaded holes corresponding to magnetic steel pressing strip axial spacing, the surface of magnetic steel assembly auxiliary plate is fixed with magnetic steel pressing strip through screw, the magnetic steel can be guided and pushed to installation position by magnetic steel pressing strip, and is fixed on the surface of rotor support through screw.

[0006] Further, the magnetic steel is made of rare earth material, the surface is provided with nickel-copper-nickel+epoxy coating, the thickness of the coating is 0.02mm-0.05mm, and the surface is marked with polarity.

[0007] Further, the magnetic steel pressing strip and the rotor pressing plate are made of stainless steel.

[0008] Further, the magnetic steel assembling auxiliary plate is provided with two rows of threaded holes.

[0009] Further, the magnetic steel assembling auxiliary plate is provided with a concave stop.

[0010] The utility model has the following beneficial effects:

[0011] 1, the utility model discloses simple structure is set up through -hole to magnetic steel, and adopts multiple positioning device of pressing strip, pressing plate, can prevent magnetic steel from appearing deviation and uneven distribution in the assembly process, simultaneously avoids the machining deviation of threaded hole and the through -hole cooperation of magnetic steel and leads to uneven distribution of magnetic steel, and assembly precision can be controlled within 0.05mm.

[0012] 2, the installation direction of magnetic steel is guided through the magnetic steel assembling auxiliary plate, reduces the operation difficulty and material loss, can improve the operability and precision of surface -bonding type rotor assembly of permanent magnet motor, satisfies batch production requirement, and reduces production cost.

[0013] 3, production efficiency is high, and magnetic steel loss is small, avoids the vibration of motor due to uneven distribution of magnetic steel. DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is the structural schematic diagram of the magnetic steel of the utility model;

[0016] Figure 3 It is the front view cut of the magnetic steel of the utility model;

[0017] Figure 4 It is the front view of the magnetic steel pressing strip of the utility model;

[0018] Figure 5 It is the side view cut of the magnetic steel pressing strip of the utility model;

[0019] Figure 6 It is the front view of the rotor pressing plate of the utility model;

[0020] Figure 7 It is the structural schematic diagram of the magnetic steel assembling auxiliary plate of the utility model;

[0021] Figure 8 It is the front view of the magnetic steel assembling auxiliary plate of the utility model;

[0022] Figure 9 For Figure 8 A-A direction view in section;

[0023] Figure 10 For Figure 8 B direction view in section;

[0024] Figure 11 For Figure 10 C direction view in section.

[0025] In the figure: 1-rotor support; 2-magnetic steel; 3-magnetic steel pressing strip; 4-rotor pressing plate; 5-magnetic steel assembly auxiliary plate; 51-fixing block. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure and function of the utility model, the utility model of a surface-mounted rotor installation structure of permanent magnet synchronous motor is described in further detail below in combination with the drawings.

[0027] As Figures 1-11 shown, a surface-mounted rotor installation structure of permanent magnet synchronous motor, comprising rotor support 1 and magnetic steel 2, and non-magnetic magnetic steel pressing strip 3, rotor pressing plate 4 and magnetic steel assembly auxiliary plate 5.Rotor support 1 barrel surface is uniformly provided with threaded hole, magnetic steel 2 is tile type, is made of rare earth material, parallel magnetization, the center of magnetic steel 2 is processed through hole, the surface uses nickel-copper-nickel+epoxy coating, the thickness of coating is 0.02mm~0.05mm, the surface is marked with polarity, avoids that magnetic steel 2 is assembled and polarity is reversed, and the demagnetization curve is basically straight line at 150 DEG C, and the magnetic energy loss in the operating temperature range is less than 3%.

[0028] Magnetic steel pressing strip 3 and rotor pressing plate 4 all adopt stainless steel material, the section of magnetic steel pressing strip 3 is inverted trapezoidal shape, and is vertically provided with through hole, and magnetic steel pressing strip 3 is fixed on the surface of rotor pressing plate 4 in whole column through screw, rotor pressing plate 4 is circular ring, the outer diameter of rotor pressing plate 4 is greater than the outer diameter of rotor support 1, and is fixed on the end side of rotor support 1 through screw, magnetic steel assembly auxiliary plate 5 is tile-shaped, is fixed on the other end side of rotor support 1 through screw when assembling magnetic steel 2, and plays a guiding role.Magnetic steel assembly auxiliary plate 5 is provided with fixing block 51 on the two sides of one end facing rotor support 1 and extending to two sides, through hole is arranged on fixing block 51 corresponding to the threaded hole of end side of rotor support 1, the front surface of magnetic steel assembly auxiliary plate 5 is coplanar with the barrel surface of rotor support 1, and at least two threaded holes are arranged on the front surface of magnetic steel assembly auxiliary plate 5 corresponding to the axial spacing of magnetic steel pressing strip 3, and magnetic steel pressing strip 3 is fixed on the surface of magnetic steel assembly auxiliary plate 5 through screw, magnetic steel 2 can be guided to move to the installation position by abutting against magnetic steel pressing strip 3, and is fixed on the surface of rotor support 1 through screw, magnetic steel pressing strip 3 and rotor pressing plate 4 not only prevent the uneven distribution of magnetic steel 2 in axial and radial directions, but also do not affect the assembly of magnetic steel 2 because of not being affected by magnetic force.

[0029] In the embodiment, the magnetic steel assembling auxiliary plate 5 is provided with two rows of threaded holes, and two rows of magnetic steel pressing strips 3 can be installed; the magnetic steel assembling auxiliary plate 5 is provided with a concave stopper, and the concave stopper is combined and connected with the convex stopper on the side surface of the rotor support 1.

[0030] The magnetic steel 2 is installed on the rotor support 1 by the magnetic steel assembling auxiliary plate 5, the magnetic steel 2 is fixed on the rotor support 1 by the magnetic steel pressing strip 3 and the rotor pressing plate 4, and the through hole in the magnetic steel 2 is penetrated by the screw, and the screw is locked into the threaded hole in the rotor support 1, so that the radial and axial fixation of the magnetic steel 2 is realized.

[0031] Before assembling, the surface of the rotor support 1 is cleaned, the rotor pressing plate 4 on the left side and the magnetic steel pressing strip 3 above the rotor support 1 are installed, Figure 1 the screw and the threaded hole for installing the magnetic steel pressing strip 3 are not shown), the magnetic steel assembling auxiliary plate 5 is fixed on the right side of the rotor support 1 through the screw hole on the right side of the rotor support 1, and one magnetic steel pressing strip 3 is installed on the magnetic steel assembling auxiliary plate 5.

[0032] Then, the magnetic steel 2 is installed, the first magnetic steel 2 is close to the magnetic steel pressing strip 3 on one side of the magnetic steel assembling auxiliary plate 5, the magnetic steel 2 is slowly pushed to the left along the direction of the magnetic steel pressing strip 3 until the left side of the rotor pressing plate 4 is close, and the magnetic steel 2 is fastened by the stainless steel screw; the second magnetic steel 2 is operated in the same way as the first magnetic steel 2, and is pushed from right to left along the direction of the magnetic steel pressing strip 3 until the second magnetic steel 2 is close to the first magnetic steel 2 and is fastened by the stainless steel screw, and the remaining magnetic steels 2 are sequentially installed in the same way until the installation of the magnetic steels 2 in one row is completed.

[0033] The magnetic steels 2 are installed in the same way as the first row of magnetic steels 2, and the magnetic steel assembling auxiliary plate 5 is exchanged to the installation position of the second row of magnetic steels 2 and then the magnetic steels 2 are installed.

[0034] After the installation of all the magnetic steels 2 is completed, the magnetic steel assembling auxiliary plate 5 is removed, the right side of the rotor pressing plate 4 is fastened on the rotor support 1 by the screw, and the whole permanent magnet rotor is installed.

[0035] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A surface-mounted rotor mounting structure for a permanent magnet synchronous motor, characterized in that, The components include a rotor support (1) and a magnet (2), as well as a non-magnetic magnet strip (3), a rotor pressure plate (4), and a magnet assembly auxiliary plate (5). The rotor support (1) has uniformly arranged threaded holes on its cylindrical surface. The magnet (2) is tile-shaped with a through hole in the center. The rotor pressure plate (4) is annular, with an outer diameter larger than that of the rotor support (1), and is fixed to one end of the rotor support (1) by screws. The magnet assembly auxiliary plate (5) is tile-shaped, and fixing blocks (51) extend to both sides of the end of the magnet assembly auxiliary plate (5) facing the rotor support (1). The fixing blocks (51) are fitted with… The rotor support (1) has a through hole on the end of the threaded hole and is fixed to the other end of the rotor support (1) by screws. The cross section of the magnet pressure strip (3) is an inverted trapezoid and has a through hole in the vertical direction. It is fixed and arranged on the rotor support (1) by screws. The front of the magnet assembly auxiliary plate (5) is coplanar with the cylindrical surface of the rotor support (1) and has at least two threaded holes spaced axially with respect to the magnet pressure strip (3). The magnet pressure strip (3) is fixed to the surface of the magnet assembly auxiliary plate (5) by screws. The magnet (2) can be guided and pushed to the installation position close to the magnet pressure strip (3) and fixed to the surface of the rotor support (1) by screws.

2. The surface-mounted rotor mounting structure for a permanent magnet synchronous motor according to claim 1, characterized in that, The magnet (2) is made of rare earth materials and has a nickel-copper-nickel+epoxy coating on its surface. The coating thickness is 0.02mm to 0.05mm and the polarity is marked on the surface.

3. The surface-mounted rotor mounting structure for a permanent magnet synchronous motor according to claim 1, characterized in that, Both the magnetic steel pressure bar (3) and the rotor pressure plate (4) are made of stainless steel.

4. The surface-mounted rotor mounting structure for a permanent magnet synchronous motor according to claim 1, characterized in that, The magnetic steel assembly auxiliary plate (5) has two rows of threaded holes.

5. The surface-mounted rotor mounting structure for a permanent magnet synchronous motor according to claim 1 or 4, characterized in that, The magnetic steel assembly auxiliary plate (5) is provided with a recessed stop.

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