Motor rotor magnet correcting device

Abstract

The utility model provides a kind of motor rotor magnet correcting device, including bottom plate, apron, multiple radial pressing block, pressure column and pressing block reset component;The bottom plate has limit board;The apron is fixed with the limit board, and the apron is pressed in magnet top end when magnet is corrected;Each radial pressing block has pressing surface and pressure receiving surface, the pressing surface is used to tightly press magnet from side, the pressure receiving surface is inclined downward along the direction from pressing surface to pressure receiving surface, the pressure column is installed in the apron and is used to receive external pressure and synchronously press on the pressure receiving surface of each radial pressing block to make radial pressing block radial expansion, and the pressure column is pressed in the bottom plate when descending to make apron synchronous press magnet;The pressing block reset component is used to reset each radial pressing block after the pressure of pressure column disappears, improve the qualified rate of motor rotor and magnet correcting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of drone motor assembly technology, and more specifically, to a motor rotor magnet correction device. Background Technology

[0002] In motor assembly, the rotor magnets often need to be aligned. In the assembly process of permanent magnet brushless motor rotors, traditional alignment devices generally employ a simple vertical unidirectional pressure structure. Position correction is achieved by pressing the arc-shaped working surface of the magnet from top to bottom using a cylindrical pressure head of fixed diameter. This technical solution has three major drawbacks: First, the unidirectional pressure method cannot generate effective radial tension force. When the pressure head is removed, the magnet is prone to positional displacement due to magnetic attraction caused by the lack of lateral constraint, resulting in a low product qualification rate. Second, during long-term use, the working surface of the cylindrical pressure head of the alignment device is prone to plastic deformation and surface wear, causing the alignment accuracy to continuously decrease with the number of uses, seriously affecting the magnet assembly qualification rate. Third, traditional alignment devices use cylindrical pressure heads of fixed diameter, meaning one alignment device corresponds to one motor. Utility Model Content

[0003] The purpose of this utility model is to provide a motor rotor magnet straightening device that improves the magnet assembly qualification rate and straightening work efficiency, so as to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a motor rotor magnet straightening device, comprising: a base plate, a cover plate, multiple radial pressure blocks, pressure columns, and a pressure block reset assembly; the base plate has a limiting plate; the cover plate is fixed to the limiting plate, and the cover plate presses against the top of the magnet during magnet straightening; each radial pressure block has an outer pressing surface and an inner bearing surface, the pressing surface is used to contact the magnet and press against the magnet from the side, and the bearing surface is inclined downward along the direction from the pressing surface to the bearing surface; the multiple radial pressure blocks are distributed in the circumferential direction and all press against the limiting plate; the pressure columns are vertically mounted on the cover plate, used to receive external pressure and synchronously press downward onto the bearing surfaces of each radial pressure block to cause the radial pressure blocks to expand radially, and the pressure columns press against the base plate when descending, causing the cover plate to synchronously press down on the magnet; the pressure block reset assembly is connected to each radial pressure block and is used to reset each radial pressure block after the pressure of the pressure column disappears.

[0005] In one embodiment, the correction device further includes a pressure column reset spring; a spring mounting column is provided at the position corresponding to the pressure column on the base plate; a spring mounting cavity is provided at one end of the pressure column near the limiting plate; one end of the pressure column reset spring is sleeved on the spring mounting column, and the other end is housed in the spring mounting cavity.

[0006] In one embodiment, the base plate further has a partition that stands upright on the limiting plate, is disposed between adjacent radial pressure blocks and extends toward the cover plate protruding from the radial pressure blocks.

[0007] In one embodiment, the base plate is provided with a nut post, and the cover plate is provided with a screw hole corresponding to the nut post, so as to fix the base plate and the cover plate by means of screws passing through the screw holes and being threaded to the nut post.

[0008] In one embodiment, a bearing is connected to the lower end of the pressure column; the bearing rolls along the bearing surface of the radial pressure block during the downward pressing of the pressure column.

[0009] In one embodiment, the radial pressure block has a fixing hole at one end away from the pressure-bearing surface; the pressure block reset assembly includes a rubber band, a rubber band mounting plate, and a rubber band post; the rubber band mounting plate has a pressure post clearance hole and a rubber band post hole, the pressure post clearance hole is located in the middle of the rubber band mounting plate, the pressure post passes through the pressure post clearance hole, and the rubber band post hole is an oblong hole; one end of the rubber band post has a rubber band mounting hole, and the other end of the rubber band post passes through the rubber band mounting plate and is inserted into the fixing hole; the rubber band passes through the rubber band mounting hole and has a tendency to reset the radial pressure block.

[0010] In one embodiment, four radial pressure blocks are provided, each radial pressure block having two fixing holes; the pressure block reset assembly has four rubber band post groups, each rubber band post group including two rubber band posts respectively disposed in the fixing holes of two opposite radial pressure blocks and connected by a rubber band; the rubber band mounting plate has four sets of rubber band post holes around the pressure post clearance hole, each rubber band post being inserted into the rubber band post hole.

[0011] In one embodiment, a support block is provided between the holes of each set of rubber band posts. The support block is integrally formed with the rubber band mounting plate. The support block is located between the two rubber bands of the two rubber band posts and protrudes from the rubber bands in the height direction.

[0012] In one embodiment, each rubber band post has two rubber band mounting holes along its height, and the rubber bands are connected to the rubber band mounting holes at the same height within the rubber band post group; two intersecting rubber bands are respectively connected to rubber band mounting holes at different heights.

[0013] In one embodiment, the correction device further includes a servo press for applying downward pressure to the pressure column.

[0014] The beneficial effects of the technical solution provided by this utility model are: 1. The correction device of this utility model applies pressure to the radial pressure block by the pressure column, causing the radial pressure block to expand radially and press against the rotor magnet from the side to achieve radial correction; the pressure column presses down on the base plate, causing the cover plate fixed to the base plate to move downward, thereby acting on the top surface of the magnet to achieve axial correction, thus achieving bidirectional correction, improving the pass rate of the rotor, and also improving the efficiency of magnet correction.

[0015] 2. The correction device of this utility model can use a servo press to provide pressure, and can accurately control the position and pressure during the correction process, thereby realizing automated production and further improving the product qualification rate.

[0016] 3. The correction device of this utility model has radial and axial elastic reset, which facilitates the separation of the correction device from the rotor.

[0017] 4. Different radial pressure blocks of different specifications can be used to adapt to various motor models.

[0018] 5. The rolling friction between the bearing of the pressure column and the radial pressure block increases the service life of the straightening device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of a motor rotor magnet correction device provided in one embodiment of the present invention; Figure 2 for Figure 1 An exploded view of the motor rotor magnet correction device shown. Figure 3 A three-dimensional structural diagram of the base plate provided in one embodiment of the present utility model; Figure 4 A three-dimensional structural diagram of a cover plate provided in one embodiment of the present utility model; Figure 5 A three-dimensional structural diagram of a radial pressure block provided in one embodiment of the present utility model; Figure 6 This is a three-dimensional structural diagram of a pressure column provided in one embodiment of the present utility model; Figure 7 A three-dimensional structural schematic diagram of a rubber band mounting plate provided in one embodiment of the present utility model; Figure 8 A three-dimensional structural schematic diagram of a rubber band post provided in one embodiment of this utility model; Figure 9 for Figure 1 The diagram shows an exploded view of the motor rotor magnet correction device and the motor rotor. Figure 10 for Figure 8 The diagram shows a cross-sectional view of the motor rotor magnet straightening device in the working state of straightening the motor rotor. Figure 11 This is a schematic diagram of the motor rotor structure after the magnets have been corrected. Detailed Implementation

[0021] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0022] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0023] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0024] It should be noted that the concepts of "first" and "second" mentioned in this utility model are only used to distinguish between devices, modules or units, and are not used to limit these devices, modules or units to necessarily be different devices, modules or units, nor are they used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] See Figures 1 to 8 and combined Figures 9 to 11 This utility model relates to a motor rotor magnet straightening device (hereinafter referred to as "straightening device") 100, which is used to straighten the magnet 210 during the assembly of the rotor 200. It can apply radial pressure (pressure along the radial direction of the motor) and axial pressure (pressure along the axial direction of the motor) to the magnet to achieve radial expansion positioning and axial synchronous pressing of the magnet, complete bidirectional straightening, and improve the magnet straightening efficiency.

[0026] The correction device 100 includes a base plate 10, a cover plate 20, a plurality of radial pressure blocks 30, pressure columns 40, and a pressure block reset assembly. The cover plate 20 is fixed to the base plate 10 and is used to press against the top of the magnet during magnet correction and to apply downward pressure to the magnet when it descends. The radial pressure blocks 30 are supported on the base plate 10 and are used to apply radial pressure to the magnet. The pressure columns 40 are used to cause the radial pressure blocks 30 to expand radially (i.e., the radial pressure blocks 30 slide outwards radially), causing the cover plate 20 to move downwards. The pressure block reset assembly is used to reset the radial pressure blocks 30.

[0027] Please combine Figure 3 In one embodiment, the base plate 10 has a limiting plate 11, which is circular and has a nut post 12 on it.

[0028] Please combine Figure 4 The cover plate 20 has a screw hole 21 corresponding to the nut column 12 for threading screws to connect with the nut column 12 to fix the cover plate 20 to the limiting plate 11. The lower end of the cover plate 20 is provided with a step 22, which presses against the top of the magnet when the magnet is being corrected.

[0029] The radial pressure blocks 30 are generally fan-shaped and movable radially. The plurality of radial pressure blocks 30 are distributed circumferentially and all abut against the limiting plate 11. Each radial pressure block 30 has an outer pressing surface 31 and an inner bearing surface 32. The pressing surface 31 is an arc surface used to contact the magnet and press against it from the side, so that it fits against the rotor housing 220 (see...). Figure 11 The bearing surface 32 is an inclined surface, and it slopes downwards along the direction from the pressure surface 31 to the bearing surface 32. Correspondingly, the radial pressure block 30 has a nut post clearance hole 34 at the position corresponding to the nut post 12. The nut post clearance hole 34 is a straight groove hole, so that the radial pressure block 30 can slide along the nut post clearance hole 34.

[0030] Please combine Figure 6 The pressure column 40 has a stepped column 41, which is vertically mounted on the cover plate 20 with a preset pressure column mounting hole 23. It is used to receive external pressure and apply pressure downward synchronously to the bearing surface 32 of each radial pressure block 30 to make the radial pressure block 30 expand radially. When the pressure column 40 descends, it presses against the bottom plate 10 to make the bottom plate 10 move downward. Since the cover plate 20 is fixed to the bottom plate 10, the cover plate 20 moves downward synchronously to press down the magnet.

[0031] The pressure block reset assembly is connected to each radial pressure block 30 and is used to reset each radial pressure block 30 after the pressure of the pressure column 40 is removed.

[0032] During correction, the motor rotor containing the magnet to be corrected is placed below the correction device 100, with the base plate 10 and radial pressure blocks 30 positioned inside the rotor. As the pressure column 40 presses down, over time, it simultaneously contacts the inclined surfaces of each radial pressure block 30, causing the radial pressure blocks 30 to expand radially. This radial pressure blocks 30 then radially compress the sides of the rotor magnet, achieving radial correction. The pressure column 40 also compresses the base plate 10 as it presses down. Since the base plate 10 and the cover plate 20 are connected by screws, the cover plate 20 can compress the arc surface at the top of the magnet, achieving axial correction and thus bidirectional correction.

[0033] Please combine Figure 2 , Figure 3 and Figure 6 In one embodiment, the correction device 100 further includes a pressure post return spring 60, which is preferably a compression spring. A spring mounting post 14 is provided at a position corresponding to the pressure post 40 on the base plate 10; a spring mounting cavity 43 is provided at one end of the pressure post 40 near the limiting plate 11; one end of the pressure post return spring 60 is sleeved on the spring mounting post 14, and the other end is housed within the spring mounting cavity 43.

[0034] In this embodiment, the spring mounting post 14 is disposed in the middle of the limiting plate 11, and multiple nut posts 12 are arranged around the spring mounting post 14. When the pressure post 40 is pressed down into place, the spring mounting cavity 43 can accommodate the spring mounting post 14 therein, and the spring mounting post 14 plays a certain guiding role during the pressing process of the pressure post 40.

[0035] Please combine Figure 3 In one embodiment, the base plate 10 further has a partition 13, which is erected on the limiting plate 11, disposed between adjacent radial pressure blocks 30 and extending outward from the radial pressure blocks 30 toward the cover plate 20.

[0036] Please combine Figure 9 Preferably, the partition 13 is higher than the radial pressure block 305mm to prevent the cover plate 20 from contacting the radial pressure block 30 and to ensure the freedom of movement of the radial pressure block 30.

[0037] Please combine Figure 6 In one embodiment, the lower end of the pressure column 40 is connected to a bearing 42. The bearing 42 rolls along the bearing surface 32 of the radial pressure block 30 during the pressing process of the pressure column 40. The rolling friction design increases the service life of the correction device 100.

[0038] Please combine Figure 5 In one embodiment, the radial pressure block 30 has a fixing hole 33 at the end away from the pressure bearing surface 32.

[0039] Please combine Figure 2 , Figure 7 and Figure 8 The pressure block reset assembly 50 includes a rubber band 52, a rubber band mounting plate 51, and a rubber band post 53. The rubber band mounting plate 51 includes a flat plate 510, which is slightly smaller than the cover plate 20. It has a pressure post clearance hole 512 and a rubber band post hole 513. The pressure post clearance hole 512 is located in the middle of the flat plate 510. The pressure post 40 passes through the pressure post clearance hole 512. The rubber band post hole 513 is a straight groove hole. One end of the rubber band post 53 has a rubber band mounting hole 533. The other end of the rubber band post 53 passes through the rubber band mounting plate 51 and is inserted into the fixing hole 33. The rubber band 52 passes through the rubber band mounting hole 533 and has a tendency to reset the radial pressure block 30.

[0040] In one embodiment, four radial pressure blocks 30 are provided, each radial pressure block 30 having two fixing holes 33; the pressure block reset assembly 50 has four rubber band post groups, each rubber band post group including two rubber band posts 53 respectively disposed in the fixing holes 33 of two opposite radial pressure blocks 30 and connected by a rubber band 52. The rubber band mounting plate 51 has four sets of rubber band post holes 513 surrounding the pressure post clearance hole 512, and one rubber band post 53 is inserted into each rubber band post hole 513.

[0041] In one embodiment, a support block 514 is provided between each set of rubber band post holes 513. The support block 514 is integrally formed with the rubber band mounting plate 51. The support block 514 is located between the two rubber bands 52 of the two rubber band post groups and protrudes from the rubber bands 52 in the height direction, so as to avoid direct contact between the cover plate 20 and the rubber bands 52 and the rubber band posts 53, and ensure the degree of freedom of movement.

[0042] In one embodiment, each rubber band post 53 includes a fixed end 531 and an installation end 532. The fixed end 531 is used to insert into the fixed hole 33 of the radial pressure block 30. The installation end 532 has two rubber band installation holes 533 along the height direction. The rubber bands 52 are connected to the rubber band installation holes 533 of the same height in the rubber band post group. Two intersecting rubber bands 52 are respectively connected to the rubber band installation holes 533 of different heights. By distributing the intersecting rubber bands 52 in a staggered manner, interference between the rubber bands 52 is avoided, which would affect the operation of the pressure block reset assembly 50.

[0043] In this embodiment, the rubber band 52 is a strong rubber band. The reset component is constructed by the rubber band 52. The elasticity of the rubber band 52 can be selected and replaced by the technician as needed. Specifically, different thicknesses of rubber bands 52 can be selected according to different models of motors to have sufficient reset pulling force to pull the two opposing radial pressure blocks 30 closer to each other (the radial pressure blocks 30 move inward) and thus realize the reset of the radial pressure blocks 30.

[0044] The bearing 42 at the lower end of the pressure column 40 abuts against the bearing surface 32 of the radial pressure block 30. When the pressure column 40 is pressed down, the radial pressure block 30 expands, increasing its radial diameter, and the rubber band 52 is stretched, accumulating elastic force. When the force pressing on the pressure column 40 is released, the pressure column 40 returns to its original position due to the upward squeezing tendency of the pressure column return spring 60, completing an axial reset. Simultaneously, the force exerted by the pressure column 40 on the radial pressure block 30 is also removed, and both sets of rubber bands 52 exert force simultaneously, causing the radial pressure block 30 to begin moving inward, completing a radial reset.

[0045] In one embodiment, the correction device 100 further includes a servo press (not shown, the same below), which is used to apply downward pressure to the pressure column 40. By using the servo press for pressing, the position and pressure during the correction process can be precisely controlled through the coordinated control of the servo press and the PLC, effectively avoiding overpressure or underpressure.

[0046] Compared with the prior art, the corrective device of this utility model has the following beneficial effects: 1. The correction device of this utility model applies downward pressure to the radial pressure block by the pressure column, causing the radial pressure block to expand radially and press against the rotor magnet from the side, thereby achieving radial correction of the magnet; the pressure column presses down on the base plate, causing the cover plate fixed to the base plate to move downward, thereby acting on the top surface of the magnet to achieve axial correction of the magnet, thus achieving bidirectional correction, improving the pass rate of the rotor, and also improving the efficiency of magnet correction.

[0047] 2. The correction device of this utility model can use a servo press to provide pressure, and can accurately control the position and pressure during the correction process, thereby realizing automated production and further improving the product qualification rate.

[0048] 3. The correction device of this utility model has elastic reset in both radial and axial directions, which facilitates the separation of the correction device from the motor rotor.

[0049] 4. Different radial pressure blocks of different specifications can be used to adapt to the assembly and correction of various motor rotor models.

[0050] 5. The service life of the straightening device is extended by the rolling friction between the bearing on the pressure column and the radial pressure block.

[0051] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of the utility model in this utility model that have similar functions.

[0052] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A motor rotor magnet correction device, characterized in that, include: Base plate, cover plate, multiple radial pressure blocks, pressure columns and pressure block reset assembly; The base plate has a limiting plate; The cover plate is fixed to the limiting plate, and the cover plate presses against the top of the magnet during magnet correction; Each of the radial pressure blocks is fan-shaped, having an outer pressing surface and an inner bearing surface. The pressing surface is an arc surface for contacting the magnet and pressing against the magnet from the side. The bearing surface is an inclined surface and slopes downward along the direction from the pressing surface to the bearing surface. The plurality of radial pressure blocks are distributed along the circumferential direction and are all pressed against the limiting plate. The pressure column is vertically mounted on the cover plate to receive external pressure and simultaneously apply downward pressure to the bearing surface of each radial pressure block, causing the radial pressure block to expand radially. When the pressure column descends, it presses against the bottom plate, causing the cover plate to press down on the magnet simultaneously. The pressure block reset assembly is connected to each radial pressure block and is used to reset each radial pressure block after the pressure of the pressure column disappears.

2. The motor rotor magnet correction device according to claim 1, characterized in that, It also includes a pressure column return spring; The base plate is provided with spring mounting columns at the positions corresponding to the pressure columns; The end of the pressure column near the limiting plate is provided with a spring mounting cavity; One end of the pressure column reset spring is sleeved on the spring mounting column, and the other end is housed in the spring mounting cavity.

3. The motor rotor magnet correction device according to claim 1, characterized in that, The base plate also has a partition plate that stands upright on the limiting plate, is disposed between adjacent radial pressure blocks and extends outward from the radial pressure blocks toward the cover plate.

4. The motor rotor magnet correction device according to claim 1, characterized in that, The base plate is provided with a nut post, and the cover plate is provided with a screw hole corresponding to the nut post, so as to fix the base plate and the cover plate by means of screws passing through the screw hole and being threaded to the nut post.

5. The motor rotor magnet straightening device according to claim 1, characterized in that, The lower end of the pressure column is connected to a bearing; the bearing rolls along the bearing surface of the radial pressure block during the downward pressing process of the pressure column.

6. The motor rotor magnet correction device according to claim 1, characterized in that, The radial pressure block has a fixing hole at the end away from the pressure bearing surface; The pressure block reset assembly includes a rubber band, a rubber band mounting plate, and a rubber band post; The rubber band mounting plate has a pressure column clearance hole and a rubber band column hole. The pressure column clearance hole is located in the middle of the rubber band mounting plate, and the pressure column passes through the pressure column clearance hole. The rubber band column hole is a waist-shaped hole. One end of the rubber band post is provided with a rubber band mounting hole, and the other end of the rubber band post passes through the rubber band mounting plate and is inserted into the fixing hole; The rubber band is inserted through the rubber band mounting hole and has a tendency to reset the radial pressure block.

7. The motor rotor magnet straightening device according to claim 6, characterized in that, The radial pressure block is provided in four parts, and each radial pressure block is provided in two fixing holes; The pressure block reset assembly is provided with four rubber band post groups. Each rubber band post group includes two rubber band posts respectively set in the fixing holes of two opposite radial pressure blocks and connected by a rubber band. The rubber band mounting plate has four sets of rubber band post holes around the pressure post clearance hole, and a rubber band post is inserted into each rubber band post hole.

8. The motor rotor magnet straightening device according to claim 7, characterized in that, A support block is provided between the holes of each set of rubber band posts. The support block is integrally formed with the rubber band mounting plate. The support block is located between the two rubber bands of the two rubber band posts and protrudes from the rubber bands in the height direction.

9. The motor rotor magnet straightening device according to claim 8, characterized in that, Each rubber band post has two rubber band mounting holes along its height, and the rubber bands are connected to the rubber band mounting holes at the same height within the rubber band post group; Two intersecting rubber bands are connected to rubber band mounting holes at different heights.

10. The motor rotor magnet correction device according to claim 1, characterized in that, It also includes a servo press, which is used to apply downward pressure to the pressure column.

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