Permanent magnet motor rotor with magnetic steel attached to surface and machining tool thereof

Abstract

The utility model provides a permanent magnet motor rotor with magnetic steel attached on the surface and a processing tool thereof. The permanent magnet motor rotor comprises a motor rotor which is provided with a smooth cylindrical outer wall, the first end of the motor rotor is provided with an annular boss, and the second end face of the motor rotor is provided with a plurality of screw holes; the magnetic steel sheets comprise multiple stages of magnetic steel sheets which are attached to the outer wall of the smooth cylinder of the motor rotor from bottom to top, and each stage of magnetic steel sheet is enclosed into a circular ring shape by a plurality of magnetic steel sheets; the magnetic steel pressing ring is pressed on the second end face of the motor rotor, and a plurality of screw holes are formed in the magnetic steel pressing ring; the fixing screws are inserted into the screw holes of the magnetic steel pressing ring and the screw holes of the motor rotor and are in threaded connection and fixation; and the gap filling epoxy resin is filled in spacing gaps formed among the magnetic steel sheets. The machining tool comprises a magnetic steel sleeve, a pressing ring and a cushion block. According to the utility model, the processing difficulty of the magnetic steel rotor is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet motors, in particular to a permanent magnet motor rotor with magnets applied to its surface and a machining tool for machining the permanent magnet motor rotor with magnets applied to its surface. Background Art

[0002] With the application and development of permanent magnet motor technology in elevator traction machines, the surface-mounted magnet solution for motor rotors has encountered a bottleneck. Traditional inner-rotor motors are generally constructed by stacking motor laminations with dovetail slots. This results in slow stacking speed, low magnet embedding efficiency, and high cost. There are also some surface-mounted magnet motor rotors on the market: one type has a fitting slot on the rotor's outer surface, with magnets embedded in the slot to achieve magnetization on the rotor surface, and the other type uses set screws to secure the magnets to the rotor surface. These existing surface-mounted magnet motor rotors have high processing costs and slow magnet attachment speeds. Utility Model Content

[0003] In order to solve the above problems, the present invention aims to provide a permanent magnet motor rotor with a surface-mounted magnetic steel and a processing tool thereof.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a permanent magnet motor rotor with a surface magnetized surface, which is characterized in that it includes: a motor rotor, which has a smooth cylindrical outer wall, a first end of the motor rotor is provided with an annular boss, and a second end surface of the motor rotor is provided with a plurality of screw holes; a magnetic steel sheet, which includes a plurality of magnetic steel sheets adhered to the smooth cylindrical outer wall of the motor rotor from bottom to top, and each level of the magnetic steel sheet is surrounded by a plurality of magnetic steel sheets to form a circular ring; a magnetic steel pressure ring, which is pressed onto the second end surface of the motor rotor, and is provided with a plurality of screw holes; a fixing screw, which is inserted into the screw hole of the magnetic steel pressure ring and the screw hole of the motor rotor and is threadedly connected and fixed; and a caulking epoxy resin, which fills the interval gap formed between the magnetic steel sheets.

[0006] Furthermore, in the permanent magnet motor rotor with surface magnetization provided by the present invention, it can also have the following characteristics: wherein, the magnetic steel sheet includes three levels of magnetic steel sheets bonded from bottom to top.

[0007] Furthermore, in the permanent magnet motor rotor with magnetized surface provided by the present invention, it may also have the following feature: wherein, the magnetic steel sheet is a rectangular magnetic steel sheet.

[0008] Furthermore, in the surface-magnetized permanent magnet motor rotor provided by the present invention, it can also have the following features: the second end face of the motor rotor is provided with four screw holes, and the four screw holes are evenly distributed in a circular array; the magnetic steel pressure ring is provided with four corresponding screw holes; and the number of fixing screws is four.

[0009] Furthermore, in the surface-magnetized permanent magnet motor rotor provided by the present invention, it can also have the following characteristics: the inner diameter of the magnetic steel pressing ring is the same as the inner diameter of the motor rotor, and the outer diameter of the magnetic steel pressing ring is the same as the outer diameter of the annular boss.

[0010] The present utility model also provides a processing tool for processing a permanent magnet motor rotor with a surface-mounted magnetic steel, characterized in that it includes: a magnetic steel sleeve, a pressure ring, and a gasket, wherein the inner wall of the magnetic steel sleeve is provided with a vertically extending guide slot, the width of the guide slot matches the width of the magnetic steel sheet, the overall height of the magnetic steel sleeve is the sum of the vertical heights of the multi-stage magnetic steel sheets, and the magnetic steel sleeve is also provided with a notch groove running through both sides; the inner diameter of the pressure ring is equal to the outer diameter of the motor rotor, and the outer diameter of the pressure ring is greater than the outer diameter of the magnetic steel sleeve; the thickness of the gasket is equal to the height of the magnetic steel sheet, the width of the gasket matches the slot width of the notch groove, and the length of the gasket is greater than the outer diameter of the magnetic steel sleeve.

[0011] Furthermore, the processing tool provided by the present invention may also have the following feature: wherein the overall height of the magnetic steel sleeve is the sum of the heights of the three-level magnetic steel sheets.

[0012] Furthermore, the processing tool provided by the present invention may also have the following features: wherein the height of the notch groove is the sum of the heights of the secondary magnetic steel sheets; and the number of the spacers is two.

[0013] Furthermore, the processing tool provided by the present invention may also have the following feature: a pull ring is provided at one end of the cushion block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the present invention, the motor rotor adopts optical outer circle processing, which effectively reduces the difficulty of rotor processing, thereby reducing the cost of the rotor; the motor rotor is multi-stage magnetic steel bonded by a specific processing tool, the guide slot of the magnetic steel sleeve positions the magnetic steel sheet, the magnetic steel pressure ring tooling quickly presses the magnetic steel sheet into place, and by reducing the positioning block under the magnetic steel sleeve, multi-stage magnetic steel can be bonded, which greatly improves efficiency and reduces labor costs; in addition, the processing tools can be reused, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a permanent magnet motor rotor with surface-mounted magnetic steel in an embodiment of the present invention;

[0017] Figure 2 This is an exploded structural diagram of a permanent magnet motor rotor with surface-mounted magnetic steel in an embodiment of the present invention;

[0018] Figure 3This is an exploded structural diagram of a processing tool for processing a permanent magnet motor rotor with a surface-mounted magnetic steel in an embodiment of the present utility model;

[0019] Figure 4 It is a schematic diagram of the use of a processing tool for processing a permanent magnet motor rotor with a surface-mounted magnetic steel in an embodiment of the present utility model.

[0020] Markings in the figure: 1. Pressure ring; 2. Magnetic steel sleeve; 21. Guide slot; 22. Notch groove; 3. Spacer; 31. Pull ring; 4. Motor rotor; 41. Screw hole; 42. Annular boss; 5. Magnetic steel sheet; 6. Magnetic steel pressure ring; 7. Fixing screw; Epoxy resin for caulking 8. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the following embodiments are combined with the accompanying drawings to specifically illustrate the technical solutions of the present invention.

[0022] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a permanent magnet motor rotor with a surface-mounted magnetic steel, comprising a motor rotor 4, a magnetic steel sheet 5, a magnetic steel pressing ring 6, fixing screws 7 and a caulking epoxy resin 8.

[0023] The motor rotor 4 has a smooth cylindrical outer wall. An annular boss 42 is provided at the first end of the motor rotor 4. A plurality of screw holes 41 are formed on the second end surface of the motor rotor 4. In this embodiment, four screw holes 41 are formed, and the four screw holes 41 are evenly distributed in an annular array on the second end surface of the motor rotor.

[0024] The magnetic steel sheets 5 comprise multiple levels of magnetic steel sheets attached from bottom to top to the smooth cylindrical outer wall of the motor rotor 4. The magnetic steel sheets 5 are rectangular, and each level of magnetic steel sheets 5 is formed into a circular ring by a plurality of magnetic steel sheets 5. In this embodiment, the magnetic steel sheets 5 comprise three levels of magnetic steel sheets attached from bottom to top.

[0025] The magnetic steel pressing ring 6 is pressed onto the second end face of the motor rotor 4. The magnetic steel pressing ring 6 has four screw holes corresponding to the screw holes in the motor rotor. The inner diameter of the magnetic steel pressing ring 6 is the same as the inner diameter of the motor rotor 4, and the outer diameter of the magnetic steel pressing ring 6 is the same as the outer diameter of the annular boss 42.

[0026] There are four fixing screws 7. The fixing screws 7 are inserted into the screw holes of the magnetic steel pressing ring 6 and the screw holes of the motor rotor 4 and are screwed together for fixing.

[0027] The gap filling epoxy resin 8 is filled in the gaps formed between the magnetic steel sheets 5 .

[0028] See also Figure 3The present invention also provides a machining tool for machining a permanent magnet motor rotor with a surface-mounted magnet, comprising a magnetic steel sleeve 2, a pressure ring 1, and a spacer 3. The magnetic steel sleeve 2, the pressure ring 1, and the spacer 3 are all made of non-magnetic materials, such as aluminum, which prevents the magnet from being affected by the magnet.

[0029] A vertically extending guide slot 21 is provided on the inner wall of the magnetic steel sleeve 2. The width of the guide slot 21 matches the width of the magnetic steel sheet 5, and the guide slot 21 is used for inserting and positioning the magnetic steel sheet 5.

[0030] The overall height of the magnetic steel sleeve 2 is the sum of the vertical heights of the multi-level magnetic steel sheets 5 . In this embodiment, the overall height of the magnetic steel sleeve 2 is the sum of the vertical heights of the three-level magnetic steel sheets 5 .

[0031] The magnetic steel sleeve 2 is further provided with a notch groove 22 running through both sides, and the groove height of the notch groove 22 is the sum of the heights of the secondary magnetic steel sheets 5 .

[0032] The inner diameter of the pressure ring 1 is equal to the outer diameter of the motor rotor 4 , and the outer diameter of the pressure ring 1 is greater than the outer diameter of the magnetic steel sleeve 2 .

[0033] There are two spacers 3. The thickness of a single spacer 3 is equal to the height of a single-stage magnetic steel sheet 5. The width of the spacer 3 matches the width of the notch 22. The length of the spacer 3 is greater than the outer diameter of the magnetic steel sleeve 2. Preferably, a pull ring 31 is provided at one end of the spacer 3.

[0034] See also Figure 4 The usage of the processing tool for processing the permanent magnet motor rotor with the surface of the magnetic steel in the embodiment of the present invention is as follows:

[0035] First, see Figure 4 In step (a), two spacers 3 are stacked, and then the motor rotor 4 is placed on the uppermost spacer 3 . The magnetic sleeve 2 is then placed outside the motor rotor 4 and ensures that the spacer 3 is inserted into the notch 22 .

[0036] Then, see Figure 4 In step (b), apply special magnetic glue to one side of the magnetic steel sheet 5 and insert it into the guide slot 21 in the magnetic steel sleeve 2 as required.

[0037] Then, see Figure 4 In (c) and (d), after a circle of magnetic steel sheets 5 is inserted, the pressure ring 1 is quickly manually inserted onto the motor rotor 4 and the magnetic steel sheets 5 are pressed into place. At this time, the first level of magnetic steel sheet pasting is completed.

[0038] Then, see Figure 4In step (e), a spacer 3 is taken out to lower the position of the magnetic sleeve 2, and then special magnetic glue is applied to one side of the magnetic steel sheet 5. A circle of magnetic steel sheets 5 is inserted into the guide slot 21, and then the pressure ring 1 is used to press the magnetic steel sheet 5 into place, thus completing the second-level magnetic steel sheet pasting.

[0039] Then, see Figure 4 In step (f), continue to remove the spacer 3 to lower the magnetic sleeve 2. Then, apply the special magnetic glue to one side of the magnetic steel sheet 5. Insert a circle of magnetic steel sheet 5 into the guide slot 21. Then, use the pressure ring 1 to press the magnetic steel sheet 5 into place. This completes the third level of magnetic steel sheet attachment. After pressing, remove the pressure ring 1.

[0040] Afterwards, see Figure 4 In step (g), remove the magnetic sleeve 2 and secure the magnetic pressure ring 6 to the motor rotor 4 using four screws 7, compressing the magnetic sheets. Finally, fill all gaps between the magnetic sheets 5 with epoxy resin, forming a structure filled with epoxy resin 8, providing secondary protection for the magnetic sheets.

[0041] The permanent magnet motor rotor with surface-mounted magnetic steel and the processing tool thereof of the embodiment of the utility model solve the problem of bonding magnetic steel to the outer circumference of the motor rotor, improve the bonding efficiency, and effectively reduce the production cost.

[0042] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A permanent magnet motor rotor with magnetic steel attached to the surface, characterized in that: include: The motor rotor has a smooth cylindrical outer wall, a first end of the motor rotor is provided with an annular boss, and a second end surface of the motor rotor is provided with a plurality of screw holes; The magnetic steel sheet comprises a plurality of magnetic steel sheets attached to the outer wall of the smooth cylinder of the motor rotor from bottom to top, wherein each magnetic steel sheet is formed into a circular ring by a plurality of magnetic steel sheets; A magnetic steel pressing ring is pressed onto the second end surface of the motor rotor, and a plurality of screw holes are formed on the magnetic steel pressing ring; A fixing screw is inserted into the screw hole of the magnetic steel pressure ring and the screw hole of the motor rotor and is threadedly connected and fixed; The gap filling epoxy resin is used to fill the gaps formed between the magnetic steel sheets.

2. The permanent magnet motor rotor with surface-mounted magnetic steel according to claim 1, characterized in that: in, The magnetic steel sheet includes three levels of magnetic steel sheets bonded from bottom to top.

3. The permanent magnet motor rotor with surface-mounted magnetic steel according to claim 1, characterized in that: in, The magnetic steel sheet is a rectangular magnetic steel sheet.

4. The permanent magnet motor rotor with surface-mounted magnetic steel according to claim 1, characterized in that: in, The second end surface of the motor rotor is provided with four screw holes, which are evenly distributed in a circular array; The magnetic steel pressure ring is provided with four corresponding screw holes; The number of the fixing screws is four.

5. The permanent magnet motor rotor with surface-mounted magnetic steel according to claim 1, characterized in that: in, The inner diameter of the magnetic steel pressing ring is the same as the inner diameter of the motor rotor, and the outer diameter of the magnetic steel pressing ring is the same as the outer diameter of the annular boss.

6. A processing tool for processing a permanent magnet motor rotor with a surface-mounted magnetic steel as claimed in any one of claims 1 to 5, characterized in that: include: Magnetic steel sleeve, pressure ring, spacer, The inner wall of the magnetic steel sleeve is provided with a vertically extending guide slot, the width of which matches the width of the magnetic steel sheet. The overall height of the magnetic steel sleeve is the sum of the vertical heights of the multi-level magnetic steel sheets. The magnetic steel sleeve is also provided with a notch groove running through both sides. The inner diameter of the pressure ring is equal to the outer diameter of the motor rotor, and the outer diameter of the pressure ring is greater than the outer diameter of the magnetic steel sleeve; The thickness of the pad is equal to the height of the magnetic steel sheet, the width of the pad matches the width of the notch groove, and the length of the pad is greater than the outer diameter of the magnetic steel sleeve.

7. The processing tool for processing a permanent magnet motor rotor with a surface-mounted magnetic steel according to claim 6, characterized in that: in, The overall height of the magnetic steel sleeve is the sum of the heights of the three-level magnetic steel sheets.

8. The processing tool for processing a permanent magnet motor rotor with a surface-mounted magnetic steel according to claim 7, characterized in that: in, The height of the notch groove is the sum of the heights of the secondary magnetic steel sheets; The number of the cushion blocks is two.

9. The processing tool for processing a permanent magnet motor rotor with a surface-mounted magnetic steel according to claim 6, characterized in that: in, A pull ring is provided at one end of the cushion block.

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