An assembly method for permanent magnet motor rotor magnets

Abstract

The application provides an assembling method for permanent magnet motor rotor magnets, and relates to an assembling device, which comprises an assembling jig, a support provided with a clamping groove, a flexible track and a plurality of fool-proof magnets; the assembling method comprises the following steps: S1, a plurality of assembling magnets coated with an accelerant are respectively fixed on corresponding fool-proof magnets of the flexible track in a manner that opposite magnetic poles are opposite to each other, and the flexible track is pushed into the clamping groove simultaneously when one assembling magnet is fixed on a fool-proof magnet; S2, a stator iron ring coated with glue is fixed in the assembling jig; S3, the flexible track is pulled out of the clamping groove, and the assembling magnets move along the flexible track and are fixed under the adsorption of the fool-proof magnets; S4, the flexible track is wound on the outer periphery of the stator iron ring simultaneously when the flexible track is pulled out, so that the assembling magnets are aligned with preset installation positions on the stator iron ring; and S5, the assembling magnets are pressed into the stator iron ring, and the adhesive assembling is completed. The application can improve the efficiency and precision of magnet assembling.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet motor rotor processing technology, and in particular to an assembly method for permanent magnet motor rotor magnets. Background Technology

[0002] In the production process of permanent magnet motors, multiple magnets need to be tightly and neatly glued to the outer surface of the rotor ring along the circumference. Traditional assembly methods primarily involve operators manually picking up and placing the magnets one by one. The specific steps are as follows: first, place the individual magnet with its inner arc surface facing upwards and apply an accelerator to it; then, flip the magnet over, use a loading jig to pick up its outer arc surface, and then push it towards the rotor ring, which has been coated with glue, so that the inner arc surface of the magnet adheres to the glue, thus attaching it to the outer surface of the rotor ring.

[0003] However, this method has the following significant drawbacks: 1. Low efficiency: Assembly requires individual operations, including flipping, brushing, picking up and placing, and alignment, resulting in low production efficiency and failing to meet the needs of mass production.

[0004] 2. Poor precision and consistency, and prone to errors: Relying entirely on manual operation, it is difficult to maintain a high degree of consistency in the spacing and placement of magnets, affecting rotor dynamic balance and motor performance. Furthermore, the magnets themselves are highly magnetic, and during manual flipping and handling, they are easily attracted to each other or misaligned due to operational errors, resulting in reversed magnet polarity or inaccurate positioning, affecting assembly efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a method for assembling rotor magnets for permanent magnet motors, which can improve the efficiency and accuracy of magnet assembly.

[0006] To achieve the above objectives, the solution of the present invention is as follows: An assembly method for a permanent magnet motor rotor magnet, relating to an assembly device for a permanent magnet motor rotor magnet, the assembly device comprising: an assembly fixture, a bracket with a slot, a flexible track slidably disposed on the slot and capable of being straightened and wound, and a plurality of foolproof magnets fixed on the flexible track at preset intervals. The assembly method includes the following steps: S1: Multiple assembled magnets coated with accelerator are respectively attached and fixed to the corresponding anti-fool magnet of the flexible track in such a way that opposite magnetic poles are opposite each other, and the flexible track is pushed into the slot simultaneously when each assembled magnet is attached to the anti-fool magnet. S2: Fix the stator iron ring coated with glue into the assembly fixture; S3: Pull the flexible track out of the slot, and the assembly magnet moves with the flexible track and remains fixed under the attraction of the foolproof magnet; S4: While the flexible track is being pulled out, it is simultaneously wound around the outer circumference of the stator ring so that the assembly magnet is aligned with the preset installation position on the stator ring. S5: Press the assembled magnet into the stator iron ring to complete the adhesive assembly.

[0007] In a preferred embodiment, the assembly fixture includes an upper fixture and a lower fixture. The upper fixture includes an upper positioning plate, and multiple positioning ribs are axially extended along the edge of the upper positioning plate. The space between adjacent positioning ribs matches the size of the assembled magnet. The lower fixture includes a lower positioning plate, and a positioning boss that axially protrudes from the lower positioning plate and matches the inner diameter of the stator iron ring.

[0008] In a preferred embodiment, the positioning boss has a positioning post protruding along its axis, and the upper positioning plate has a positioning hole along its axis that matches the positioning post.

[0009] In a preferred embodiment, the bracket is in the shape of a long plate, with a slot provided along the length of the bracket. Stepped surfaces are provided on both sides of the bottom of the slot along the length of the bracket, so that the slot forms a double-layer receiving structure. A stop bar is provided at the opening of the slot along the length of the bracket, and the end of the assembled magnet is located between the stop bar and the stepped surface.

[0010] After adopting the above solution, the beneficial effects of the present invention are as follows: 1. Significantly improves efficiency: This invention fixes multiple anti-foolproof magnets at preset intervals on a flexible track, which can complete the loading, positioning and transfer of multiple assembly magnets at one time, avoiding the actions of flipping and picking up one by one in the traditional method, and effectively improving assembly efficiency.

[0011] 2. Ensure positioning accuracy and correct polarity: The positions of the foolproof magnets on the flexible track are preset and fixed, ensuring that the assembled magnets can be attracted in the correct direction, fundamentally eliminating the possibility of reversed polarity. At the same time, the spacing between the assembled magnets is guaranteed by the spacing of the foolproof magnets on the flexible track, ensuring high consistency and reducing the assembly difficulty and training costs for operators. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the assembly process in an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly process from another angle in an embodiment of the present invention; Figure 3 This is a schematic diagram of removing the stator iron ring from the assembly fixture in an embodiment of the present invention; Figure 4 This is a schematic diagram of the assembly of the magnets adsorbed and fixed onto the foolproof magnets of the flexible track in an embodiment of the present invention; Figure 5 This is a schematic diagram of the flexible track, along with the assembly magnet and the foolproof magnet, placed in the slot of the bracket in an embodiment of the present invention; Figure 6 This is a schematic diagram of two types of assembled magnets attached to the outer periphery of the stator iron ring in an embodiment of the present invention.

[0013] Label Explanation: 1. Bracket; 11. Slot; 12. Stepped surface; 13. Stop bar; 2. Flexible tracks; 3. Upper positioning plate; 31. Positioning ribs; 32. Positioning holes; 4. Lower positioning plate; 41. Positioning boss; 42. Positioning post; 5. Assemble the magnets; 6. Foolproof magnets; 7. Stator iron ring. Detailed Implementation

[0014] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0015] This embodiment provides a method for assembling rotor magnets for permanent magnet motors, and relates to an assembly device for rotor magnets of permanent magnet motors, such as... Figures 1 to 6 As shown, the assembly equipment includes: an assembly fixture, a bracket 1 with a slot 11, a flexible track 2 that is slidably disposed on the slot 11 and can be straightened and wound, and a plurality of foolproof magnets 6 fixed on the flexible track 2 at preset intervals.

[0016] The assembled magnet 5 in this embodiment has two types: one type has an N pole on one side of the outer arc surface and an S pole on one side of the inner arc surface; the other type has an S pole on the outer arc surface and an N pole on the inner arc surface.

[0017] To ensure ease and accuracy of assembly and loading, multiple foolproof magnets 6, which are fixed at preset intervals according to the distribution pattern of the rotor magnetic poles to be assembled, are also divided into two groups.

[0018] The first group consists of: the N pole side of each foolproof magnet 6 is fixedly attached to the flexible track 2, so that its S pole side can attract and fix the assembled magnet 5 whose outer arc surface side is the N pole.

[0019] The second group consists of: the S pole side of each foolproof magnet 6 is fixedly attached to the flexible track 2, so that its N pole side can attract and fix the assembled magnet 5 whose outer arc surface side is the S pole.

[0020] Of course, such as Figure 4 As shown, the side of the anti-fool magnet 6 that is fixedly attached to the flexible track 2 can be set as a flat surface, while the side used to adsorb and fix the assembly magnet 5 can be set as an arc surface that matches the outer arc surface of the assembly magnet 5.

[0021] The assembled permanent magnet motor rotor is as follows Figure 6As shown, two types of assembled ferromagnets are alternately arranged on the outer periphery of the stator iron ring 7, and the polarity directions of adjacent assembled magnets 5 are opposite.

[0022] like Figure 1 , Figure 2 and Figure 5 As shown, the bracket 1 is in the shape of a long plate, and the slot 11 is arranged along the length direction of the bracket 1. The bottom of the slot 11 has stepped surfaces 12 on both sides along the length direction of the bracket 1, so that the slot 11 forms a double-layer receiving structure. The opening of the slot 11 has a baffle 13 along the length direction of the bracket 1. The end of the assembly magnet 5 is located between the baffle 13 and the stepped surface 12, which can prevent the assembly magnet 5 from falling out of the slot 11 during the pulling process of the flexible track 2, and ensure the smooth progress of the assembly process.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, to further ensure the accuracy of assembly, the assembly fixture in this embodiment includes an upper fixture and a lower fixture for fixing the stator ring 7 to be assembled. The upper fixture includes an upper positioning plate 3, with multiple positioning ribs 31 extending axially from its edge. The space between adjacent positioning ribs 31 matches the size of the assembly magnet 5, allowing the assembly magnet 5 to be embedded. The lower fixture includes a lower positioning plate 4, with a positioning boss 41 axially protruding from the lower positioning plate 4, matching the inner diameter of the stator ring 7. The positioning boss 41 has a positioning post 42 protruding along its axis, and the upper positioning plate 3 has a positioning hole 32 along its axis that matches the positioning post 42.

[0024] Specifically, the stator ring 7 is fitted onto the positioning boss 41 of the lower positioning plate 4, and the upper positioning plate 3 is fitted onto the positioning post 42 of the positioning boss 41 through the positioning hole 32, thereby realizing the internal and external positioning of the stator ring 7. The structure is simple and easy to set up.

[0025] The assembly method in this embodiment includes the following steps: S1: Multiple assembled magnets 5 coated with accelerator are respectively attracted and fixed to the corresponding anti-fool magnets 6 of the flexible track 2 in such a way that opposite magnetic poles are facing each other, and each time an assembled magnet 5 is attracted to the anti-fool magnet 6, the flexible track 2 is simultaneously pushed into the slot 11. S2: Fix the stator iron ring 7 coated with glue into the assembly fixture; S3: Pull the flexible track 2 out of the slot 11, and the assembly magnet 5 moves with the flexible track 2 and remains fixed under the attraction of the foolproof magnet 6; S4: While the flexible track 2 is being pulled out, it is simultaneously wound around the outer periphery of the stator ring 7 so that the assembly magnet 5 is aligned with the preset installation position on the stator ring 7. S5: Press the assembled magnet 5 into the stator iron ring 7 to complete the adhesive assembly.

[0026] During assembly, a preparation process is first performed. According to production requirements, the operator applies an accelerator to the inner arc surface of the assembly magnet 5 and attaches it to the anti-foolproof magnet 6 of the flexible track 2, corresponding to the outer arc surface of the assembly magnet 5. During this process, each time an assembly magnet 5 is attached to the anti-foolproof magnet 6, the flexible track 2 is simultaneously pushed into the slot 11 of the bracket 1. After all assembly magnets 5 are placed, their ends are located between the stop bar 13 and the step surface 12 of the slot 11, thus being constrained within the slot 11, and subsequently can only slide along the length of the bracket 1 with the flexible track 2.

[0027] Next, the stator ring 7, with glue already applied to its outer surface, is fitted onto the positioning boss 41 of the lower fixture. Then, the upper positioning plate 3 is placed onto the positioning post 42 of the positioning boss 41 through the positioning hole 32, thus achieving internal and external positioning of the stator ring 7. The operator holds the end of the flexible track 2 and pulls it smoothly out of the slot 11. During the pulling process, all the assembly magnets 5 move together with the flexible track 2 under the attraction of the foolproof magnet 6, and will not fall off the flexible track 2.

[0028] While the flexible track 2 is being pulled out, it is simultaneously wrapped around the outer circumference of the stator ring 7. Since the space between the adjacent positioning ribs 31 of the upper fixture matches the size of the assembly magnets 5, the multiple assembly magnets 5 on the flexible track 2 can be embedded one by one into the space between the adjacent positioning ribs 31 during the wrapping motion, and are attached to the outer circumference of the stator ring 7, i.e., the preset installation position formed by the adjacent positioning ribs 31.

[0029] After completing the pasting of one polarity of the assembled magnet 5, remove the flexible track 2 and replace it with a flexible track 2 that has been attached with the opposite polarity of the assembled magnet 5. Continue to wrap it around the outer circumference of the stator iron ring 7 so that the assembled magnets 5 with opposite polarities continue to be pasted in the remaining assembly space on the outer circumference of the stator iron ring 7. This completes the alternating polarity pasting of all the assembled magnets 5 of the permanent magnet motor rotor.

[0030] The directional terms used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A method for assembling rotor magnets for permanent magnet motors, characterized in that: The invention relates to an assembly apparatus for a rotor magnet of a permanent magnet motor, the assembly apparatus comprising: an assembly fixture, a bracket with slots, a flexible track slidably disposed on the slots and capable of being straightened and wound, and a plurality of foolproof magnets fixed at preset intervals on the flexible track. The assembly method includes the following steps: S1: Multiple assembled magnets coated with accelerator are respectively attached and fixed to the corresponding anti-fool magnet of the flexible track in such a way that opposite magnetic poles are opposite each other, and the flexible track is pushed into the slot simultaneously when each assembled magnet is attached to the anti-fool magnet. S2: Fix the stator iron ring coated with glue into the assembly fixture; S3: Pull the flexible track out of the slot, and the assembly magnet moves with the flexible track and remains fixed under the attraction of the foolproof magnet; S4: While the flexible track is being pulled out, it is simultaneously wound around the outer circumference of the stator ring so that the assembly magnet is aligned with the preset installation position on the stator ring. S5: Press the assembled magnet into the stator iron ring to complete the adhesive assembly.

2. The assembly method for a permanent magnet motor rotor magnet as described in claim 1, characterized in that: The assembly fixture includes an upper fixture and a lower fixture. The upper fixture includes an upper positioning plate with multiple positioning ribs extending axially along its edge. The space between adjacent positioning ribs matches the size of the assembled magnet. The lower fixture includes a lower positioning plate with a positioning boss that axially protrudes from the lower positioning plate and matches the inner diameter of the stator iron ring.

3. The assembly method for a permanent magnet motor rotor magnet as described in claim 2, characterized in that: The positioning boss has a positioning post protruding along its axis, and the upper positioning plate has a positioning hole along its axis that matches the positioning post.

4. The assembly method for a permanent magnet motor rotor magnet as described in claim 1, characterized in that: The bracket is in the shape of a long plate, with a slot set along the length of the bracket. Stepped surfaces are provided on both sides of the bottom of the slot along the length of the bracket, so that the slot forms a double-layer receiving structure. A stop bar is provided at the opening of the slot along the length of the bracket, and the end of the assembled magnet is located between the stop bar and the stepped surface.

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