Surface-mounted rotor magnetic steel protection structure and motor thereof

Abstract

The utility model relates to a surface-mounted rotor magnetic steel protection structure and a motor thereof, belongs to the field of motor manufacturing, and mainly solves the technical problems that magnetic steel on a rotor is easy to loosen, deviate, unstable and the like when an existing surface-mounted motor rotor rotates. According to the technical scheme, the protection structure comprises a rotor, a magnetic steel assembly and a protection piece, the magnetic steel assembly is arranged on the surface of the rotor, the protection piece is arranged on the rotor and the magnetic steel assembly, the magnetic steel assembly comprises a plurality of magnetic steel sets, the magnetic steel sets are evenly arranged in the axial direction, and the magnetic steel sets are evenly arranged around the circumference of the surface of the rotor. One end of the protection piece is arranged at one end of the rotor, and the other end of the protection piece surrounds the rotor and the magnetic steel assembly to the other end of the rotor; the method is mainly applied to the permanent magnet motor, ensures stable operation of the motor, and reduces maintenance time and maintenance cost of the motor.

Description

Technical Field

[0001] This utility model relates to a rotor protection structure, and more particularly to a surface-mounted motor rotor magnet protection structure. Background Technology

[0002] Existing surface-mount rotor magnet protection structures sometimes use adhesives directly on the rotor to fix the magnets. However, frequent switching between start-stop and overload conditions during long-term operation can cause the protection structure to fail, leading to magnet detachment. Other methods involve adding a sleeve to the rotor, which can cause the rotor to overheat and impair heat dissipation, affecting magnet performance and potentially causing demagnetization. Still other methods involve directly wrapping multiple layers or overlapping sheaths on the rotor. These sheaths are complex to manufacture, have poor elasticity, and can easily compress the magnets during installation, causing damage and breakage. Furthermore, national standards... With the vigorous promotion of new energy applications and energy conservation and emission reduction, the motor and related industries are booming, and the number of enterprises has also shown explosive growth. However, with more and more enterprises, each enterprise has different standards for its products and is subject to different processing techniques. This can easily cause the arc surface of the motor magnet to mismatch with the surface of the motor rotor, resulting in gaps between the magnet and the rotor, which can lead to the magnet separating from the rotor and damaging the motor. Existing methods do not meet the requirements of the new generation of permanent magnet motors for performance improvement in all directions. At present, there is a need for a protective structure that can protect the rotor well during installation and operation to solve the various problems that arise from traditional methods. Summary of the Invention

[0003] The purpose of this utility model is to provide a surface-mount motor rotor protection structure that is easy to install, does not easily damage the magnets during installation, has a stable structure, and can effectively dissipate heat from the rotor, as well as a motor with a surface-mount motor rotor protection structure.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a surface-mounted rotor magnet protection structure, the protection structure including a rotor, a magnet assembly and a protection assembly, the magnet assembly being disposed on the rotor surface, the protection assembly being disposed on the rotor and the magnet assembly, the rotor surface being provided with magnet slots, the magnet assembly being disposed in the magnet slots; the magnet assembly including multiple magnet groups, the multiple magnet groups being evenly distributed in the magnet slots, the multiple magnet groups being evenly arranged axially and evenly arranged around the circumference of the rotor surface; the protection assembly including a protective element and a closing buckle, the closing buckle fixing the two ends of the protective element; one end of the protective element being disposed on the outer surface of one end of the rotor, the other end of the protective element extending around the rotor and the magnet assembly to the other end of the rotor; the closing buckle including a fixing part connecting the rotor, a positioning part connecting the magnet, and a connecting part between the fixing part and the positioning part, the distance between the fixing part and the positioning part being greater than or slightly greater than the thickness of the rotor.

[0005] The multiple magnet groups of this utility model include a first magnet group to an Nth magnet group, which are uniformly arranged along the axial direction to one end; the first magnet group includes a first magnet to an Mth magnet, which are uniformly arranged around the circumference of the rotor surface; the other magnet groups are also provided with magnets corresponding to the first magnet to the Mth magnet; N>2; M>2.

[0006] The protective component of this invention is disposed at one end of the rotor, and the other end of the protective component extends spirally around the rotor and the magnet assembly to the other end of the rotor.

[0007] The protective component of this utility model is strip-shaped and surrounds the rotor and the magnet assembly. The protective component surrounds and fixes all the magnets of multiple magnet groups in the magnet assembly.

[0008] The protective component of this utility model includes a strip with a cross-section of triangle, quadrilateral, trapezoid, etc. The protective component is spirally fixed around the rotor and the magnet assembly. When the motor is working, the rotor rotates, which drives the protective component to rotate. This causes the air or coolant on the surface of the rotor to move with the rotation of the protective component, and at the same time, it carries away the heat generated when the rotor is working, preventing the magnet from losing its magnetism due to excessive temperature, and ensuring that the motor can run for a long time.

[0009] The protective component of this utility model spirally surrounds and fixes all the magnets in the magnet assembly. During the production process, each component will have tolerances when it is produced. The rotor of the motor will be equipped with multiple magnets. The large number of magnets will cause some magnets to be incompatible with the rotor of the motor. In order to ensure that the magnets on the rotor are stably connected, the protective component of this utility model will surround and fix all the magnets in the magnet assembly, ensuring that all the magnets on the rotor are stably connected, and at the same time protecting the magnets on the rotor from being stripped off by the centrifugal force of the rotor when the rotor is rotating.

[0010] The fixing part of the snap fastener of this utility model is provided with a fixing through hole and a fixing member. The fixing member cooperates with and passes through the fixing through hole to connect and fix to the inner surface of the rotor.

[0011] The fixing part of the snap fastener of this utility model extends from one end of the inner surface of the rotor to the other end of the rotor. The fixing part is provided with multiple fixing through holes and multiple fixing members. The multiple fixing members respectively cooperate and pass through the multiple fixing through holes to connect and fix to the inner surface of the rotor.

[0012] The closing buckle of this utility model is connected to the inner surface of the rotor at one end, and to the magnet of the magnet assembly at the other end. The closing buckle presses the protective component to connect to the magnet assembly.

[0013] Preferably, one end of the snap fastener of this utility model presses against the magnet assembly connected to the outer surface of the rotor by the protective component, and the other end of the snap fastener is connected to the inner surface of the rotor.

[0014] The positioning part of the snap fastener of this utility model has an inwardly protruding part, which is fixed in contact with the magnetic steel assembly.

[0015] The positioning part of this utility model has a recess on the protrusion. The length of the end face of the protrusion is slightly smaller than the distance between the two magnets in the magnet assembly. The recess is connected and fixed to the magnet to restrict the movement of the magnet.

[0016] The positioning part of this utility model has two recesses on its protrusion. The distance between the two recesses is slightly smaller than the distance between the two magnets in the magnet assembly. The two recesses cooperate with the two adjacent magnets and fix the two adjacent magnets at the same time.

[0017] The protective component of this utility model includes a first protective component and a second protective component. The first protective component and the second protective component are arranged in parallel. The first protective component and the second protective component together surround and fix all the magnets of the multiple magnet groups in the magnet assembly, and fix the magnets in a double helix.

[0018] The snap fastener of this utility model has one end connected to the magnet assembly on the outer surface of the rotor, and the other end extends along the inner surface of the rotor to the other end of the rotor and is connected to the magnet assembly at the other end of the rotor.

[0019] Preferably, one end of the snap fastener of this utility model presses against the magnet assembly connected to the outer surface of the rotor of the protective component, and the other end of the snap fastener extends along the inner surface of the rotor to the other end of the rotor to press against the other end of the protective component and connect to the magnet assembly at this end of the rotor.

[0020] The end of the snap fastener near the rotor of this utility model is provided with a fixing member, and the snap fastener is fixedly connected to the rotor through the fixing member. The end of the snap fastener near the magnet assembly is also provided with a fixing wing, and the snap fastener is fixedly connected to the magnet assembly through the fixing wing.

[0021] The snap fastener of this utility model is provided with a fixing hole that cooperates with the fixing component. The fixing component fixes the snap fastener to the rotor through the fixing hole.

[0022] The multiple magnet assembly of this utility model includes multiple magnets and multiple magnetic isolation strips. The magnetic isolation strips are disposed between adjacent magnets to isolate the magnets and prevent them from affecting each other.

[0023] The present invention comprises multiple magnet groups, including a first magnet group to an Nth magnet group. The first magnet group includes a first magnet, a second magnet to an Mth magnet. The first magnet and the second magnet of the first magnet group are connected and in contact. The other magnets of the first magnet group are arranged evenly and at intervals around the circumference of the rotor surface. The gap between the first magnet and the Mth magnet of the first magnet group is larger than the gap between any two other magnets in the first magnet group. The recess of the closing buckle is located at the gap between the first magnet and the Mth magnet of the first magnet group. The fixing wing of the closing buckle is located at the end of the first magnet and the Mth magnet, and simultaneously connects the first magnet and the Mth magnet of the first magnet group. The recess and the fixing wing, together with two adjacent magnets, form a stable structure.

[0024] The Nth magnet group of this utility model includes a first magnet to a (M-1)th magnet and an Mth magnet. The (M-1)th magnet of the Nth magnet group is connected to the Mth magnet. The other magnets of the Nth magnet group are arranged evenly at intervals around the circumference of the rotor surface. The gap between the first magnet and the Mth magnet of the Nth magnet group is larger than the gap between any two other magnets in the Nth magnet group. The recess of the closing buckle is located in the gap between the first magnet and the Mth magnet of the Nth magnet group. The fixing wing of the closing buckle is located at the end of the first magnet and the Mth magnet and simultaneously connects the first magnet and the Mth magnet of the Nth magnet group. The recess and the fixing wing, together with two adjacent magnets, form a stable structure.

[0025] The electric motor of this utility model includes a stator, a rotor, a magnet assembly, the aforementioned protective components, and a housing. The stator, rotor, magnet assembly, and the aforementioned protective components are disposed inside the housing. The rotor is disposed inside the stator. The magnet assembly and the protective components are disposed on the surface of the rotor. The protective components surround and fix the magnet assembly.

[0026] The electric motor of this utility model includes a stator, a rotor, a magnet assembly, the aforementioned protective assembly, and a housing. The stator, rotor, magnet assembly, and the aforementioned protective assembly are disposed inside the housing. The stator is disposed inside the rotor. The magnet assembly and the protective assembly are disposed on the surface of the rotor. The protective assembly surrounds and fixes the magnet assembly.

[0027] The beneficial effects of this utility model are: this structure has high tensile and compressive strength, effectively overcoming the centrifugal force when the rotor rotates; at the same time, because it is spirally wrapped around the magnet, the rotor can drive the air between the rotor and the stator when the rotor rotates, effectively cooling and dissipating heat from the motor rotor and stator assemblies; the installation process is simple during production and assembly; this structure further restricts the movement of the magnet to prevent the magnet from falling off, ensuring the stability, reliability, continuity and long-term operation of the motor; in addition, the overall cost of the protective structure is low while significantly improving the performance of the motor, and it has a wide range of applications and a good market prospect. Attached Figure Description

[0028] Figure 1 This is a perspective view of the present invention;

[0029] Figure 2 This is a perspective view of the non-closing buckle of this utility model;

[0030] Figure 3 This is a perspective view of the rotor and magnet combination of this utility model;

[0031] Figure 4 This is a perspective view of the rotor of this utility model;

[0032] Figure 5 This is a perspective view of the protective component of this utility model;

[0033] Figure 6 This is a perspective view of the closing buckle of this utility model from one direction;

[0034] Figure 7 This is a perspective view of the closing buckle of this utility model from another direction;

[0035] Figure 8 This is a perspective view of one structure of the closing buckle of this utility model;

[0036] Figure 9 This is a perspective view of the dual protective component combination of this utility model;

[0037] Figure 10 This is a view of the magnet arrangement of the first magnet group of this utility model;

[0038] Figure 11 This is a view of the magnet arrangement in the 10th magnet group of this utility model.

[0039] In the diagram: 1-rotor, 2-magnet assembly, 3-protective component, 11-magnet slot, 211-first magnet group, 2110-tenth magnet group, 221-first magnet, 222-second magnet, 2296-96th magnet, first magnet of the tenth magnet group - 22101, 95th magnet of the tenth magnet group - 221095, 96th magnet of the tenth magnet group - 221096, 4-closing buckle, 41-fixing part, 42-connecting part, 43-positioning part, 411-fixing through hole, 412-fixing component, 431-protrusion, 432-recess, 433-fixing wing. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0041] Example 1, see Figure 1 This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 is disposed on the surface of the rotor 1, and the protective element 3 is disposed on the rotor 1 and the magnet assembly 2. A magnet groove 11 is provided on the surface of the rotor 1, and the magnet assembly 2 can be placed in the magnet groove 11. The magnet assembly 2 includes multiple magnet groups, which are evenly distributed in the magnet groove 11. The multiple magnet groups are evenly arranged axially and evenly arranged around the circumference of the rotor surface. One end of the protective element 3 is disposed at one end of the rotor 1, and the other end of the protective element 3 is arranged around the circumference of the rotor 1. The rotor 1 and the magnet assembly 2 are connected to the other end of the rotor 1; multiple magnet groups include a first magnet group 211 to a tenth magnet group 2110, which are evenly arranged along the axial direction to one end; the first magnet group includes a first magnet 221 to a 96th magnet 2296, which are evenly arranged around the circumference of the rotor surface, and the other magnet groups are also provided with magnets corresponding to the first magnet 221 to the 96th magnet 2296; one end of the closing buckle 4 presses the protective member 3 connected to the magnet assembly 2 on the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1.

[0042] Example 2: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 is disposed on the surface of the rotor 1, and the protective element 3 is disposed on the rotor 1 and the magnet assembly 2. A magnet groove 11 is provided on the surface of the rotor 1, and the magnet assembly 2 can be placed in the magnet groove 11. The magnet assembly 2 includes multiple magnet groups, which are evenly distributed in the magnet groove 11. The multiple magnet groups are evenly arranged axially and evenly arranged around the circumference of the rotor surface. One end of the protective element 3 is disposed at one end of the rotor 1. The other end surrounds the rotor 1 and the magnet assembly 2 to the other end of the rotor 1; multiple magnet groups include a first magnet group to a sixth magnet group, which are uniformly arranged axially towards one end; the first magnet group includes a first magnet to a 96th magnet, which are uniformly arranged around the circumference of the rotor surface, and the other magnet groups are also provided with magnets corresponding to the first magnet to the 96th magnet; one end of the closing buckle 4 presses the protective member 3 to the magnet assembly 2 connected to the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1; the rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0043] Example 3: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 includes multiple magnet groups, including a first magnet group to a tenth magnet group, which are uniformly arranged axially towards one end. The first magnet group includes a first magnet to a sixth magnet, which are uniformly arranged around the circumference of the rotor surface. The other magnet groups are also provided with magnets corresponding to the first magnet to the sixth magnet. One end of the closing buckle 4 presses against the protective element 3 connected to the magnet assembly 2 on the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0044] Example 4: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 includes multiple magnet groups, including a first magnet group to a tenth magnet group, which are uniformly arranged axially towards one end. The first magnet group includes a first magnet to a thirty-second magnet, which are uniformly arranged around the circumference of the rotor surface. The other magnet groups are also provided with magnets corresponding to the first magnet to the thirty-second magnet. One end of the closing buckle 4 presses against the protective element 3 connected to the magnet assembly 2 on the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0045] Example 5: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 includes multiple magnet groups, including a first magnet group to a tenth magnet group, which are uniformly arranged axially towards one end. The first magnet group includes a first magnet to a sixteenth magnet, which are uniformly arranged around the circumference of the rotor surface. The other magnet groups are also provided with magnets corresponding to the first magnet to the sixteenth magnet. One end of the closing buckle 4 presses against the protective element 3 connected to the magnet assembly 2 on the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0046] Example 6: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 includes multiple magnet groups, including a first magnet group to a tenth magnet group, which are uniformly arranged axially towards one end. The first magnet group includes a first magnet to a twelfth magnet, which are uniformly arranged around the circumference of the rotor surface. The other magnet groups are also provided with magnets corresponding to the first magnet to the twelfth magnet. One end of the closing buckle 4 presses against the protective element 3 connected to the magnet assembly 2 on the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0047] Example 7: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 includes multiple magnet groups, which are divided into 1st to 10th magnet groups. The 1st to 10th magnet groups are evenly arranged along one end of the axial direction. The 1st magnet group includes 1st to 10th magnets, which are evenly arranged around the circumference of the rotor surface. The other magnet groups are also provided with magnets corresponding to the 1st to 10th magnets. One end of the closing buckle 4 presses against the protective element 3 connected to the magnet assembly 2 on the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0048] Example 8: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, a protective element 3, and a closing buckle 4. The magnet assembly 2 includes multiple magnet groups, which are divided into 1st to 10th magnet groups, and these groups are evenly arranged axially towards one end. The 1st magnet group includes 1st to 8th magnets, which are evenly arranged around the circumference of the rotor surface. The other magnet groups also have magnets corresponding to the 1st to 8th magnets. One end of the closing buckle 4 presses against the protective element 3 connected to the magnet assembly 2 on the outer surface of the rotor, and the other end of the closing buckle 4 is connected to the inner surface of the rotor 1. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0049] Example 9, see Figure 2 This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1, a magnet assembly 2, and a protective element 3. The magnet assembly 2 is disposed on the surface of the rotor 1, and the protective element 3 is disposed on the rotor 1 and the magnet assembly 2. The magnet assembly 2 includes multiple magnet groups, which are uniformly arranged axially and uniformly arranged around the circumference of the rotor surface. One end of the protective element 3 is disposed at one end of the rotor 1, and the other end of the protective element 3 surrounds the rotor 1 and the magnet assembly 2. At the other end of rotor 1; multiple magnet groups, including a first magnet group to a tenth magnet group, are uniformly arranged along the axial direction to one end; the first magnet group includes a first magnet 221 to a 96th magnet 2296, which are uniformly arranged around the circumference of the rotor surface; the other magnet groups are also provided with magnets corresponding to the first magnet 221 to the 96th magnet 2296; the rest are the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0050] Example 10: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor 1 and a magnet assembly 2, which is disposed on the surface of the rotor 1. The magnet assembly 2 includes multiple magnet groups, which are uniformly arranged axially and uniformly arranged around the circumference of the rotor surface. The multiple magnet groups include a first magnet group to a tenth magnet group, which are uniformly arranged axially towards one end. The first magnet group includes a first magnet to a thirty-fourth magnet, which are uniformly arranged around the circumference of the rotor surface. The other magnet groups are also provided with magnets corresponding to the first to the thirty-fourth magnets. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0051] Example 11, see Figure 6 and Figure 7 This utility model discloses a surface-mount rotor magnet protection structure. The protection structure includes a snap-fit ​​4, which includes a fixing part 41 for connecting the rotor, a positioning part 43 for connecting the magnet, and a connecting part 42 between the fixing part and the positioning part. The fixing part 41 of the snap-fit ​​is provided with a fixing through hole 411 and a fixing member 412. The fixing member 412 cooperates with and passes through the fixing through hole 411 to connect and fix to the inner surface of the rotor. A thread can be provided in the fixing through hole 411 to cooperate with the fixing member 412. The positioning part 43 of the snap-fit ​​4 has an inwardly provided protrusion 431, a concave part 432 on the protrusion 431, and a fixing wing 433 on the protrusion 431. When the snap-fit ​​4 is installed on the rotor, the concave part 432 prevents the magnet from moving laterally, and the fixing wing 433 prevents the magnet from moving vertically. The rest is the same as any other embodiment or combination of two or more embodiments of this utility model.

[0052] Example 12, see Figure 8 This utility model discloses a surface-mount rotor magnet protection structure. The protection structure includes a snap-fit ​​buckle, which includes a fixing part for connecting the rotor, an upper positioning part for connecting the magnet, a lower positioning part for connecting the magnet, an upper connecting part between the fixing part and the upper positioning part, and a lower connecting part between the fixing part and the lower positioning part. The fixing part of the snap-fit ​​buckle extends from one end of the inner surface of the rotor to the other end of the rotor. The fixing part is provided with multiple fixing through holes and multiple fixing members. The multiple fixing members respectively cooperate and pass through the multiple fixing through holes to connect and fix to the inner surface of the rotor. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0053] Example 13, see Figure 9This utility model discloses a surface-mounted rotor magnet protection structure. The protection component includes a first protection component and a second protection component. The first protection component and the second protection component are arranged in parallel. The first protection component and the second protection component together surround and fix all the magnets of multiple magnet groups in the magnet assembly. The rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0054] Example 14, see Figure 5 This utility model discloses a surface-mounted rotor magnet protection structure. The protective component can be made of silicon steel sheet. Silicon steel sheet has the characteristics of low iron loss, high magnetic induction intensity, good hardness, excellent flatness and thickness uniformity, etc., and is suitable as the protective component material of the surface-mounted rotor magnet protection structure of this utility model; the rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0055] Example 15, see Figure 10 This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor, a magnet assembly, a protective element, and a snap-fit. The magnet assembly is disposed on the rotor surface, and the protective element is disposed on the rotor and the magnet assembly. The magnet assembly includes multiple magnet groups, which are uniformly arranged axially and uniformly arranged around the circumference of the rotor surface. One end of the protective element is disposed at one end of the rotor, and the other end of the protective element surrounds the rotor and the magnet assembly to the other end of the rotor. The multiple magnet groups include a first magnet group 211 to a tenth magnet group 2110. The first magnet group 211 includes a first magnet 221 and a second magnet 222 to a ninth magnet 2296. The first magnet 221 and the second magnet 222 of the first magnet group 211 are connected and in contact. The second magnet 222 to the 96th magnet 2296 are arranged evenly around the circumference of the rotor surface. The gap between the first magnet 221 and the 96th magnet 2296 of the first magnet group 211 is larger than the gap between any two adjacent magnets of the second magnet 222 to the 96th magnet 2296. The protrusion of the closing buckle is located at the gap between the first magnet 221 and the 96th magnet 2296 of the first magnet group 211, and simultaneously connects the first magnet 221 and the 96th magnet 2296 of the first magnet group 211. One end of the closing buckle presses against the magnet assembly connected to the outer surface of the rotor by the protective member, and the other end of the closing buckle connects to the inner surface of the rotor, forming a stable structure; the rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0056] Example 16, see Figure 11This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor, a magnet assembly, a protective element, and a snap-fit. The magnet assembly is disposed on the rotor surface, and the protective element is disposed on the rotor and the magnet assembly. The magnet assembly includes multiple magnet groups, which are uniformly arranged axially and uniformly arranged around the circumference of the rotor surface. One end of the protective element is disposed at one end of the rotor, and the other end of the protective element surrounds the rotor and the magnet assembly to the other end of the rotor. The multiple magnet groups include a first magnet group 211 to a tenth magnet group 2110. The tenth magnet group 2110 includes magnets 22101 to 95th magnets 221095 and 96th magnets 221096 of the tenth magnet group. Magnets 221095 and 96th magnets 221096 of the tenth magnet group are connected and in contact. The magnets 22101 (first magnet) to 95 (95) (second magnet) of the 10th magnet group are arranged evenly at intervals around the circumference of the rotor surface. The gap between the first magnet 22101 and the 96th magnet 221096 of the 10th magnet group is larger than the gap between any two adjacent magnets in the 10th magnet group. The protrusion of the closing buckle is located on the 10th magnet group. The gap between the first magnet 22101 of the steel group and the 96th magnet 221096 of the tenth magnet group is simultaneously connected to the first magnet 22101 of the tenth magnet group and the 96th magnet 221096 of the tenth magnet group. One end of the closing buckle presses against the magnet assembly connected to the outer surface of the rotor by the protective member, and the other end of the closing buckle is connected to the inner surface of the rotor to form a stable structure; the rest is the same as any other embodiment of this utility model or a combination of two or more embodiments.

[0057] Example 17: This utility model discloses a surface-mounted rotor magnet protection structure. The protection structure includes a rotor, a magnet assembly, a protective element, and two closing buckles. The protective element is disposed on the rotor and the magnet assembly, with one end of the protective element disposed at one end of the rotor and the other end of the protective element surrounding the rotor and the magnet assembly to the other end of the rotor. The closing buckle includes a fixing part connecting the rotor, a positioning part connecting the magnet, and a connecting part between the fixing part and the positioning part. The distance between the fixing part and the positioning part is slightly greater than the thickness of the rotor. The closing buckle disposed at the lower end of the rotor has its positioning part connected and fixed to the magnet, and its fixing part is fixed to the rotor by laser welding. The closing buckle disposed at the upper end of the rotor has its positioning part connected and fixed to the magnet, and its fixing part is fixed to the rotor by bolts.

[0058] The technical solutions of the embodiments of this application will be clearly and completely described above with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is not intended to limit this application or its application or use in any way. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0059] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of illustrative purposes and to facilitate understanding and reading by those skilled in the art, and are not intended to limit the implementation conditions of this application. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose achieved by this application, should still fall within the scope of the technical content disclosed in this application. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0060] Furthermore, it should be noted that the use of terms such as "the first" and "the second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

Claims

1. A surface-mounted rotor magnet protection structure, characterized in that: The protective structure includes a rotor, a magnet assembly, and a protective assembly. The magnet assembly is disposed on the surface of the rotor, and the protective assembly is fixed to the rotor and the magnet assembly. The rotor surface is provided with a magnetic steel groove, and the magnetic steel assembly is disposed in the magnetic steel groove; The magnet assembly includes multiple magnet groups, which are evenly distributed in the magnet slots. The multiple magnet groups are evenly arranged along the axial direction and evenly arranged around the circumference of the rotor surface. The protective component includes a protective element and a closing buckle, wherein the closing buckle secures the two ends of the protective element. One end of the protective component is disposed on the outer surface of one end of the rotor, and the other end extends around the rotor and the magnet assembly to the other end of the rotor; The closing buckle includes a fixing part for connecting the rotor, a positioning part for connecting the magnet, and a connecting part between the fixing part and the positioning part. The distance between the fixing part and the positioning part is greater than or slightly greater than the thickness of the rotor.

2. The surface-mounted rotor magnet protection structure according to claim 1, characterized in that: The protective element is strip-shaped and surrounds the rotor and the magnet assembly. The protective element surrounds and fixes all the magnets of multiple magnet groups in the magnet assembly.

3. The surface-mounted rotor magnet protection structure according to claim 1, characterized in that: The fixing part of the closing buckle is provided with a fixing through hole and a fixing member. The fixing member cooperates with and passes through the fixing through hole to connect and fix to the inner surface of the rotor.

4. The surface-mounted rotor magnet protection structure according to claim 1, characterized in that: The fixing part of the closing buckle extends from one end of the inner surface of the rotor to the other end of the rotor. The fixing part is provided with multiple fixing through holes and multiple fixing members. The multiple fixing members respectively cooperate and pass through the multiple fixing through holes to connect and fix to the inner surface of the rotor.

5. The surface-mounted rotor magnet protection structure according to claim 1, characterized in that: The positioning part of the closing buckle has an inward protrusion, which contacts and fixes the magnetic steel assembly.

6. The surface-mounted rotor magnet protection structure according to claim 5, characterized in that: The positioning part has a recess on the protrusion, and the length of the end face of the protrusion is slightly smaller than the distance between the two magnets in the magnet assembly.

7. The surface-mounted rotor magnet protection structure according to claim 5, characterized in that: The convex part of the positioning part is provided with two concave parts, and the distance between the two concave parts is slightly smaller than the distance between the two magnets in the magnet assembly.

8. The surface-mounted rotor magnet protection structure according to claim 1, characterized in that: The protective component includes a first protective component and a second protective component. The first protective component and the second protective component are arranged in parallel, and the first protective component and the second protective component together surround and fix all the magnets of the multiple magnet groups in the magnet assembly.

9. The surface-mounted rotor magnet protection structure according to any one of claims 1-8, characterized in that: The plurality of magnet groups include a plurality of magnets and a plurality of magnetic isolation strips, wherein the magnetic isolation strips are disposed between adjacent magnets.

10. An electric motor, comprising a surface-mounted rotor magnet protection structure as described in any one of claims 1-8, characterized in that: The motor includes a stator, a rotor, a magnet assembly, the aforementioned protective components, and a housing. The stator, rotor, magnet assembly, and the aforementioned protective components are disposed inside the housing. The rotor is disposed inside the stator. The magnet assembly and the protective components are disposed on the surface of the rotor. The protective components surround and fix the magnet assembly.

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