A rotor structure of anti-falling magnetic tile and a frameless torque motor applying the same

Abstract

The utility model relates to motor technical field, propose a kind of anti-falling magnetic shoe's rotor structure and the frameless torque motor of application thereof, the rotor structure includes rotor core and several magnetic shoes, the cross section of rotor core is annular, and the outer periphery of rotor core is equipped with several magnetic shoes;First fixed position is equipped between the outer side wall and the inner side wall of rotor core, the number of first fixed position is same with the number of magnetic shoe, second fixed position is equipped on the magnetic shoe, and first fixed position and second fixed position are all along the axial arrangement of rotor core;First connecting piece and second connecting piece fixedly connected by each first fixed position are equipped, and first connecting piece and second connecting piece are respectively fixedly installed on the second fixed position of two different adjacent magnetic shoe.The utility model aims at by optimizing the connecting structure of magnetic shoe and rotor core, the fixed strength of magnetic shoe is enhanced, and the stability of motor when high-speed operation is ensured.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor structure for preventing the falling off of magnetic tiles and a frameless torque motor using the same. Background Technology

[0002] Reliable fixing of the magnet to the rotor core is one of the key technical challenges in improving the operational stability and service life of the motor. Traditional magnet fixing methods mostly use adhesive bonding: after applying an adhesive such as epoxy resin to the surface of the rotor core, the magnet is attached to the predetermined position, and then pressure is applied by a fixing clamp until it cures. This process depends on the mechanical strength and curing quality of the adhesive, and requires strict control of parameters such as adhesive layer thickness and curing temperature, making the process quite complex.

[0003] The above method has a significant risk of magnet detachment: the adhesive is easily affected by centrifugal force, thermal expansion and mechanical vibration when the motor is running at high speed, which can lead to stress concentration or interface peeling of the adhesive layer. Especially under high speed and heavy load conditions, the physical connection strength between the magnet and the rotor core is insufficient, which can easily cause the magnet to shift or detach in whole, leading to problems such as uneven air gap and magnetic field distortion, which seriously affect the motor performance and operation safety. Utility Model Content

[0004] To address the aforementioned deficiencies, the purpose of this invention is to propose a rotor structure with anti-detachment magnetic tiles and a frameless torque motor using the same structure. The aim is to enhance the fixing strength of the magnetic tiles by optimizing the connection structure between the magnetic tiles and the rotor core, thereby ensuring the stability of the motor during high-speed operation.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A rotor structure for preventing the falling off of magnetic tiles includes a rotor core and a plurality of magnetic tiles. The rotor core has an annular cross-section, and the outer circumferential surface of the rotor core is provided with a plurality of magnetic tiles.

[0007] A first fixing position is provided between the outer side wall and the inner side wall of the rotor core. The number of the first fixing positions is the same as the number of magnetic tiles. A second fixing position is provided on the magnetic tiles. Both the first fixing position and the second fixing position are arranged along the axial direction of the rotor core.

[0008] Each first fixing position is provided with a first connector and a second connector that are fixedly connected thereto. The first connector and the second connector are respectively fixedly installed on the second fixing positions on two different adjacent magnetic tiles.

[0009] Preferably, the second fixing position is located at the midpoint of the width direction of the magnetic tile.

[0010] Preferably, the magnetic tile is provided with two second fixing positions, which are respectively located on both sides of the width direction of the magnetic tile.

[0011] Preferably, the first connector and the second connector are made of non-magnetic materials.

[0012] Preferably, a frameless torque motor with a rotor structure employing anti-fall-off magnets is provided, wherein the frameless torque motor employs the rotor structure described above, and the frameless torque motor further includes a plurality of windings;

[0013] The stator ring is formed by several individual iron cores and its cross-section is annular. Each individual iron core is an I-shaped structure composed of a first flange, a second flange, and a web. The web is used to connect the first flange and the second flange. The outer ring of the stator ring is surrounded by the first flange, and the coils form the winding around the web.

[0014] The rotor core has an annular cross-section and is located in the inner ring of the stator ring. The outer circumferential surface of the rotor core is provided with magnetic tiles, and the rotor core can rotate relative to the stator ring.

[0015] Preferably, each web plate is provided with two skeletons, which are respectively located on both sides of the winding.

[0016] Preferably, the length of the second flange is less than that of the first flange, and a gap is left between each second flange.

[0017] Preferably, the web is arranged along the radial direction of the stator ring.

[0018] Preferably, the magnetic tile is connected to the rotor core via a magnetic tile sleeve.

[0019] Preferably, a motor PCB board is provided on one side of the stator core, and the motor PCB board is attached to the frame.

[0020] One of the above technical solutions has the following advantages or beneficial effects:

[0021] This invention provides a first fixing position between the outer and inner walls of the rotor core and a second fixing position on the magnetic tile. The adjacent magnetic tiles are fixedly connected by the first and second connecting parts, which effectively prevents the magnetic tiles from falling off under high-speed rotation or vibration conditions, thereby improving the reliability and service life of the rotor. Compared to traditional adhesives or welding, the structure between the rotor and the magnet in this invention is more reliable, making it particularly suitable for high-speed, high-load motor applications. The mechanical connectors effectively resist stress caused by centrifugal force, vibration, and thermal expansion, preventing the magnets from detaching due to adhesive aging, cracking, or failure, as is common in traditional methods. Especially under harsh conditions of high temperature, high humidity, or high vibration, the stability of the mechanical connection is superior to that of adhesives. Unlike adhesives, which require curing time and are difficult to disassemble after curing, the mechanical connection method, through designs such as threaded holes and slots, makes the installation and replacement of the magnets simple and quick, significantly reducing maintenance and time costs. Furthermore, the mechanical connection method is almost unaffected by environmental factors, adapting to a wider range of operating conditions, including extreme temperature variations within the motor. By rationally setting the positions and structures of the first and second fixing positions, magnetic flux leakage and eddy current losses can be reduced, optimizing the motor's magnetic circuit design and improving operating efficiency. The mechanical connectors typically possess good corrosion resistance and chemical stability, maintaining performance even in harsh environments, thereby extending the service life of the connectors and the entire rotor structure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first structure of a frameless torque motor with a rotor structure that uses anti-falling magnets, provided in one embodiment of this utility model.

[0023] Figure 2 This is a schematic diagram of the second structure of a frameless torque motor with a rotor structure that uses anti-falling magnets, provided in one embodiment of this utility model.

[0024] Figure 3 This is a side view of a frameless torque motor with a rotor structure that incorporates anti-falling magnets, provided in one embodiment of this utility model.

[0025] Figure 4 This is a schematic diagram of the stator iron ring of a frameless torque motor with a rotor structure that uses anti-fall-off magnetic tiles, provided in one embodiment of this utility model.

[0026] Among them: stator iron ring 1, rotor iron core 2, winding 3, single iron core 11, first flange 111, web 112, second flange 113, magnet 4, frame 5, motor PCB board 6, first fixing position 71, second fixing position 72, first connector 81, second connector 82. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] A rotor structure for preventing the magnetic tiles from falling off, such as Figure 1 As shown, a preferred embodiment of the present invention includes a rotor core 2 and a plurality of magnetic tiles 4. The rotor core 2 has an annular cross-section, and the outer circumferential surface of the rotor core 2 is provided with a plurality of magnetic tiles 4.

[0032] A first fixing position 71 is provided between the outer side wall and the inner side wall of the rotor core 2. The number of the first fixing positions 71 is the same as the number of magnetic tiles 4. A second fixing position 72 is provided on the magnetic tiles 4. Both the first fixing position 71 and the second fixing position 72 are arranged along the axial direction of the rotor core 2.

[0033] Each first fixing position 71 is provided with a first connector 81 and a second connector 82 that are fixedly connected thereto. The first connector 81 and the second connector 82 are respectively fixedly installed on the second fixing positions 72 on two different adjacent magnetic tiles 4.

[0034] The rotor structure of the anti-detachment magnetic tile 4 is achieved by setting a first fixing position 71 between the outer and inner side walls of the rotor core 2 and a second fixing position 72 on the magnetic tile 4. Adjacent magnetic tiles 4 are fixedly connected by the first connector 81 and the second connector 82, thereby achieving stable fixation of the magnetic tile 4 under high-speed rotation or vibration conditions. Its design aims to solve the problem of magnetic tiles 4 falling off due to centrifugal force or mechanical vibration in traditional rotor structures, ensuring a tight fit between the magnetic tile 4 and the rotor core 2, improving the reliability and service life of the rotor. By replacing traditional adhesives or welding with mechanical connection, it not only enhances the fixing strength of the magnetic tile 4, but also facilitates the installation and replacement of the magnetic tile 4, making it suitable for high-speed and high-load motor applications.

[0035] The rotor core 2 has an annular cross-section, which provides a mounting base for the magnetic tiles 4. The magnetic tiles 4 are magnetic components of the rotor, installed on the outer circumference of the rotor core 2, and are used to generate a magnetic field. The first fixing position 71 is located between the outer and inner side walls of the rotor core 2 and extends axially, for installing the first connector 81 and the second connector 82. The second fixing position 72 is located on the magnetic tiles 4 and is used to install the connectors. The first connector 81 and the second connector 82 are respectively fixedly installed on the second fixing position 72 on the adjacent magnetic tiles 4, and the magnetic tiles 4 are fixed to the rotor core 2 by mechanical connection to prevent the magnetic tiles 4 from falling off during high-speed rotation or vibration.

[0036] Furthermore, the first fixing position 71 and the second fixing position 72 can be designed as threaded holes or slots, and the magnet 4 can be fixed by bolts or snap-fit ​​connectors. For example, a threaded hole can be machined between the outer and inner sidewalls of the rotor core 2 as the first fixing position 71, and a corresponding threaded hole can be machined on the magnet 4 as the second fixing position 72. The threaded connection provides high mechanical strength, effectively resisting centrifugal force and vibration, ensuring a stable connection of the magnet 4. The design of the threaded hole allows the use of standard bolts, facilitating installation and replacement. The size of the threaded hole can be optimized according to actual needs, reducing material usage. To reduce rotor weight, the threaded holes themselves do not increase the magnetic conduction path, and the magnetic influence can be further reduced by selecting low magnetic permeability materials (such as stainless steel bolts). A slot is machined between the outer and inner walls of the rotor core 2 as the first fixing position 71, and a corresponding slot is machined on the magnetic tile 4 as the second fixing position 72. The slot design allows for quick fixing using snap-fit ​​or wedge blocks, suitable for scenarios requiring frequent disassembly and assembly. The mechanical engagement of the slots effectively prevents displacement of the magnetic tile 4. The depth and width of the slots can be designed to be shallow to reduce material usage while maintaining structural strength. The slots themselves do not increase the magnetic conduction path, and the snap-fit ​​or wedge blocks can be made of non-magnetic materials (such as plastic or composite materials) to further reduce the magnetic influence. The first connector 81 and the second connector 82 can be fixed to the first fixing position 71 and the second fixing position 72 by welding or riveting, suitable for different working conditions. For example, the first connector 81 and the second connector 82 can be made into a single molded part to reduce the space occupied.

[0037] This invention uses mechanical connectors (such as bolts, clips, or welding) to fix the magnet 4 to the rotor core 2, rather than relying on the chemical adhesive force of an adhesive. This mechanical connection effectively resists stress caused by centrifugal force, vibration, and thermal expansion, preventing the magnet 4 from detaching due to adhesive aging, cracking, or failure. Especially under harsh conditions of high temperature, high humidity, or high vibration, the stability of the mechanical connection is superior to that of an adhesive. Furthermore, adhesives require curing time and are difficult to remove after curing, making the installation and replacement of the magnet 4 complex and time-consuming. This structure, however, uses mechanical connectors to fix the magnet 4. During installation, simply align the connectors with the fixing positions and tighten or snap them together; during disassembly, simply loosen the connectors, and the magnet 4 can be easily removed, significantly reducing maintenance and time costs. The performance of adhesives is greatly affected by environmental factors (such as temperature, humidity, and chemical corrosion), which may lead to a decrease in bonding strength. In contrast, the mechanical connection method of this structure is almost unaffected by environmental factors and can adapt to a wider range of operating conditions, including extreme temperature changes in the motor.

[0038] Preferably, such as Figure 1 As shown, the second fixing position 72 is located at the midpoint of the width direction of the magnetic tile 4.

[0039] Specifically, by setting a second fixing position 72 at the midpoint of the width direction of the magnetic tile 4, and using the first connector 81 and the second connector 82 to fix adjacent magnetic tiles 4, the magnetic tiles 4 are stably fixed under high-speed rotation or vibration conditions. This ensures that the magnetic tiles 4 are subjected to uniform force in the width direction, effectively resisting centrifugal force and vibration, and preventing the magnetic tiles 4 from shifting or falling off. The purpose is to solve the problem of the magnetic tiles 4 falling off due to uneven force in traditional structures, ensuring a tight fit between the magnetic tiles 4 and the rotor core 2, improving the reliability and service life of the rotor. By replacing traditional adhesives or welding with mechanical connections, the fixing strength of the magnetic tiles 4 is not only enhanced, but also the installation and replacement of the magnetic tiles 4 are facilitated. This method is suitable for high-speed and high-load motor applications.

[0040] Preferably, such as Figure 2 As shown, the magnetic tile 4 is provided with two second fixing positions 72, which are respectively located on both sides of the width direction of the magnetic tile 4.

[0041] Specifically, the design of setting the second fixing position 72 on both sides of the width direction of the magnetic tile 4, compared with the design of setting it at the midpoint, is based on the principle of achieving a more uniform stress distribution through fixing on both sides: fixing on both sides can effectively resist the displacement and rotation of the magnetic tile 4 in the width direction, especially under high speed and high vibration conditions, ensuring a tight fit between the magnetic tile 4 and the rotor core 2. The stability of the magnetic tile 4 is enhanced by fixing at multiple points, preventing stress concentration and magnetic tile 4 detachment caused by fixing at a single point, thereby improving the reliability and service life of the rotor. Especially when the magnetic tile 4 is wide, the implementation of fixing on both sides is suitable for scenarios that require higher stability and vibration resistance, while fixing at the midpoint is suitable for environments where the magnetic tile 4 is narrow or the vibration is small.

[0042] Preferably, the first connector 81 and the second connector 82 are made of non-magnetic materials.

[0043] The first connector 81 and the second connector 82 are designed as non-magnetic materials. This reduces interference from the connectors to the motor's magnetic field, optimizes the magnetic circuit design, and improves the motor's efficiency and performance. The non-magnetic materials do not form additional magnetic paths, thus avoiding magnetic flux leakage and eddy current losses between the magnetic tile 4 and the rotor core 2 caused by the magnetic permeability of the connectors. By reducing the magnetic permeability of the connectors, energy loss is reduced, and the motor's operating efficiency is improved. Furthermore, non-magnetic materials typically have good corrosion resistance and chemical stability, enabling them to adapt to harsh working environments and extend the service life of the connectors. This makes them suitable for high-efficiency, high-reliability motor applications.

[0044] A frameless torque motor with a rotor structure employing anti-fall-off magnets is characterized in that the frameless torque motor employs the rotor structure described above, and the frameless torque motor further includes a plurality of windings 3;

[0045] The stator ring 1 is formed by several individual iron cores 11 and has an annular cross-section. Each individual iron core 11 is an I-shaped structure composed of a first flange 111, a second flange 113, and a web 112. The web 112 is used to connect the first flange 111 and the second flange 113. The outer ring of the stator ring 1 is formed by the first flange 111. The coil surrounds the web 112 to form the winding 3.

[0046] The rotor core 2 has an annular cross-section and is located in the inner ring of the stator ring 1. The outer circumferential surface of the rotor core 2 is provided with magnetic tiles 4, and the rotor core 2 can rotate relative to the stator ring 1.

[0047] like Figure 1-4 As shown, the frameless torque motor is a direct drive motor. Its core principle is to generate torque through electromagnetic induction, thereby achieving relative rotation between the rotor and stator. The stator ring 1 is formed by several individual iron cores 11, creating a ring structure. The windings 3 are arranged around the web 112 of the individual iron cores 11, generating a magnetic field through current input. The rotor core 2 is located in the inner ring of the stator ring 1, and its outer circumference is provided with magnetic tiles 4, which provide a stable magnetic field. When the windings 3 are energized, the magnetic field generated by the stator ring 1 interacts with the magnetic field of the rotor core 2, forming an electromagnetic force that drives the rotor core 2 to rotate. Its design aims to achieve high torque density, high response speed, and low maintenance costs, making it suitable for scenarios requiring precise control and high efficiency, such as industrial robots, precision machining equipment, and automated production lines.

[0048] Specifically, the stator ring 1 is the fixed part of the motor, composed of several individual iron cores 11. The stator ring 1 has an annular cross-section, and the individual iron cores 11 have an I-shaped structure, consisting of a first flange 111, a second flange 113, and a web 112. The first flange 111 forms the outer ring of the stator ring 1, used to fix and support the entire structure. The web 112 connects the first flange 111 and the second flange 113, providing winding space for the windings 3. The second flange 113 is located in the inner ring, forming a magnetic circuit with the rotor core 2. The windings 3 are arranged around the web 112, generating a magnetic field through current input, and are a key component for generating torque in the motor. The rotor core 2 is the rotating part of the motor, with an annular cross-section and magnetic tiles 4 on its outer circumference. The magnetic tiles 4 provide a stable magnetic field, ensuring the electromagnetic force between the rotor and the stator.

[0049] The implementation of the frameless torque motor can be adjusted according to different application scenarios. For example, the number of individual iron cores 11 can be optimized according to the required torque density; the more cores, the higher the magnetic flux density and the stronger the torque output. The number of turns and wire diameter of winding 3 can be designed according to current requirements; the more turns, the stronger the magnetic field, but the resistance will also increase. Therefore, it is necessary to balance efficiency and torque based on experimental data. The material and number of magnetic tiles 4 can be selected according to the magnetic field strength requirements. High magnetic permeability materials can improve magnetic field uniformity, and increasing the number can enhance magnetic field strength. Different combinations of the above implementation methods can achieve various technical effects. For example, by increasing the number of individual iron cores 11 and optimizing the design of winding 3, the torque density can be significantly improved; by selecting magnetic tiles 4 made of high magnetic permeability materials, magnetic field uniformity and heat dissipation efficiency can be improved. In addition, this embodiment omits structures such as the outer shell and bearings, requiring users to install support components (such as bearings and couplings) to achieve direct coupling with the load. In practical applications, the rotor is directly connected to the load without the need for intermediate transmission links such as reducers, reducing energy loss and mechanical lag. Users can customize the installation method according to their needs, saving space.

[0050] Preferably, each of the web plates 112 is provided with two skeletons 5, which are respectively located on both sides of the winding 3.

[0051] Specifically, the frame 5 is installed on the web 112 of the stator ring 1 and located on both sides of the winding 3. Its main function is to fix the winding 3, ensuring its stability during motor operation and preventing deformation or displacement due to electromagnetic force or mechanical vibration. The structural design of the frame 5 enables it to withstand the electromagnetic force and mechanical stress generated during motor operation. By setting two frames 5 on the web 112, located on both sides of the winding 3, stress can be effectively distributed, enhancing the mechanical stability of the entire stator ring 1. This is suitable for high torque output and high frequency operation scenarios, ensuring the reliability of the motor during long-term operation. In addition, the frame 5 can be made of a material with good thermal conductivity (such as aluminum or copper), which can effectively conduct the heat generated by the winding 3 and help dissipate heat. The winding 3 generates heat when energized. If the heat cannot be dissipated in time, it will cause the winding 3 to overheat, affecting motor performance or even damaging the winding 3. The frame 5, through its good thermal conductivity, conducts heat to the stator ring 11 or other heat dissipation components, thereby improving the motor's heat dissipation efficiency and extending the service life of the winding 3.

[0052] Preferably, the length of the second flange 113 is less than that of the first flange 111, and a gap is left between each second flange 113.

[0053] Specifically, the second flange 113 is shorter than the first flange 111 and has a gap, which facilitates the installation and maintenance of the winding 3. The shorter second flange 113 and the gap make the winding 3 easier to wind and fix, and also make it easier to disassemble and inspect the winding 3 during maintenance, which can reduce the complexity of installation and maintenance and improve the convenience of operation.

[0054] Although the second flange 113 is relatively short, its structural design can still provide sufficient mechanical support. The gap between each second flange 113 will not affect the stability of the overall structure. On the contrary, it can enhance the mechanical stability of the entire stator ring 1 by dispersing stress. It is suitable for high torque output and high frequency operation scenarios, ensuring the reliability of the motor during long-term operation.

[0055] In addition, the gap between the second flanges 113 facilitates air circulation, thereby improving heat dissipation efficiency. When the winding 3 is energized, it will generate heat. If the heat cannot be dissipated in time, it will cause the winding 3 to overheat, affecting the motor performance or even damaging the winding 3. Therefore, leaving a gap between the second flanges 113 can effectively conduct and dissipate the heat generated by the winding 3, extending the service life of the winding 3.

[0056] Preferably, the web 112 is arranged along the radial direction of the stator ring 1.

[0057] The web 112 is arranged radially, allowing the winding 3 to be mounted radially on the web 112. This helps optimize the magnetic field distribution and improve the magnetic flux density and magnetic field uniformity. The radially mounted winding 3 reduces the assembly space and conductor gaps, thereby increasing the slot fill factor and enhancing the concentration of the magnetic field. This is crucial for improving the torque output efficiency of the motor, especially during high-load and high-frequency operation, ensuring the uniformity and stability of the magnetic field.

[0058] Preferably, the magnetic tile 4 is connected to the rotor core 2 via a magnetic tile sleeve.

[0059] Specifically, the magnetic tile sleeve provides strong fixing force to ensure that the magnetic tile 4 will not loosen or fall off during motor operation. It is suitable for high-speed motors because the centrifugal force generated during high-speed operation may cause the magnetic tile 4 to shift or fall off. The use of the magnetic tile sleeve can effectively prevent this from happening and ensure the stable operation of the motor.

[0060] Preferably, a motor PCB board 6 is provided on one side of the stator core, and the motor PCB board 6 is attached to the frame 5.

[0061] The motor PCB board 6 integrates the drive circuit, sensor and communication interface, and is directly attached to the stator iron ring 1 to shorten the power line and signal transmission distance and reduce electromagnetic interference. At the same time, the rotor position is closed-loop detected by Hall element. The motor PCB board 6 can use a high thermal conductivity substrate to transfer the heat of the winding 3 to the heat dissipation coating on the PCB surface or the external heat sink through the frame 5, forming a direct heat dissipation path.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotor structure for preventing the falling off of magnetic tiles, characterized in that, It includes a rotor core and several magnetic tiles. The rotor core has an annular cross-section and several magnetic tiles are provided on the outer circumferential surface of the rotor core. A first fixing position is provided between the outer side wall and the inner side wall of the rotor core. The number of the first fixing positions is the same as the number of magnetic tiles. A second fixing position is provided on the magnetic tiles. Both the first fixing position and the second fixing position are arranged along the axial direction of the rotor core. Each first fixing position is provided with a first connector and a second connector that are fixedly connected thereto. The first connector and the second connector are respectively fixedly installed on the second fixing positions on two different adjacent magnetic tiles.

2. The rotor structure according to claim 1, characterized in that, The second fixed position is located at the midpoint of the width direction of the magnetic tile.

3. The rotor structure according to claim 1, characterized in that, The magnetic tile is provided with two second fixing positions, which are respectively located on both sides of the width direction of the magnetic tile.

4. The rotor structure according to claim 1, characterized in that, The first connector and the second connector are made of non-magnetic materials.

5. A frameless torque motor with a rotor structure employing anti-detachment magnets, characterized in that, The frameless torque motor uses the rotor structure as described in any one of claims 1-4, and the frameless torque motor further includes a plurality of windings; The stator ring is formed by several individual iron cores and its cross-section is annular. Each individual iron core is an I-shaped structure composed of a first flange, a second flange, and a web. The web is used to connect the first flange and the second flange. The outer ring of the stator ring is surrounded by the first flange, and the coils form the winding around the web. The rotor core has an annular cross-section and is located in the inner ring of the stator ring. The outer circumferential surface of the rotor core is provided with magnetic tiles, and the rotor core can rotate relative to the stator ring.

6. The frameless torque motor according to claim 5, characterized in that, Each web plate is provided with two skeletons, which are respectively located on both sides of the winding.

7. The frameless torque motor according to claim 5, characterized in that, The length of the second flange is less than that of the first flange, and there is a gap between each second flange.

8. The frameless torque motor according to claim 5, characterized in that, The web is arranged along the radial direction of the stator ring.

9. The frameless torque motor according to claim 5, characterized in that, The magnetic tile is connected to the rotor core via a magnetic tile sleeve.

10. The frameless torque motor according to claim 5, characterized in that, A motor PCB board is provided on one side of the stator core, and the motor PCB board is attached to the frame.

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