Frameless torque motor

Abstract

The utility model relates to motor technical field, propose a kind of frameless torque motor, the frameless torque motor includes stator iron ring, rotor iron core and winding;The stator iron ring is enclosed by several single cores and its cross section is annular, the single core is the similar I-shaped structure consisting of first flange, second flange and web, the web is used to connect first flange and second flange, the outer ring of stator iron ring is enclosed by first flange, coil surrounds the web and forms the winding;The cross section of the rotor iron core is annular, the rotor iron core is located the inner ring of stator iron ring, the outer circumferential surface of the rotor iron core is equipped with magnetic tile, the rotor iron core can rotate relative to stator iron ring.The utility model eliminates redundant framework, optimizes the integrated design of stator and rotor, supports the quick installation and disassembly of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a frameless torque motor. Background Technology

[0002] As a core component of high-precision direct-drive equipment, the structural design of torque motors directly affects system integration and dynamic performance. Traditional torque motors often adopt a frame structure, where the stator core and rotor assembly are fixedly connected by an external metal frame (such as a cast iron or aluminum alloy shell). These are often designed as closed shells or cylindrical structures with heat dissipation fins. Therefore, the external frame increases the axial and radial dimensions of the motor, making it difficult to increase power density and meet the lightweight requirements of compact devices (such as collaborative robot joints). The heat generated by the windings must be conducted sequentially through the stator core teeth → the inner wall of the frame → the external heat dissipation structure. This multi-layered interfacial thermal resistance leads to significant temperature rise, limiting the motor's continuous output capability. Furthermore, the rigid connection between the frame and the stator core requires complete disassembly when the stator is damaged, resulting in high repair costs. The stringent precision requirements for frame machining also increase manufacturing costs. Utility Model Content

[0003] To address the aforementioned shortcomings, the purpose of this invention is to propose a frameless torque motor, which aims to support rapid installation and disassembly of the motor by eliminating redundant frames and optimizing the integrated design of the stator and rotor.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A frameless torque motor includes a stator ring, a rotor core, and windings;

[0006] 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.

[0007] 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.

[0008] Preferably, each web plate is provided with two skeletons, which are respectively located on both sides of the winding.

[0009] Preferably, the length of the second flange is less than that of the first flange, and a gap is left between each second flange.

[0010] Preferably, the magnetic tile is adhered to the outer peripheral surface of the rotor core by an adhesive.

[0011] Preferably, the web is arranged along the radial direction of the stator ring.

[0012] Preferably, the magnetic tile is connected to the rotor core via a magnetic tile sleeve.

[0013] Preferably, a motor PCB board is provided on one side of the stator core, and the motor PCB board is attached to the frame.

[0014] One of the above technical solutions has the following advantages or beneficial effects:

[0015] This invention eliminates redundant frames through the structural design of the stator ring and rotor core, thereby increasing power density and meeting the lightweight requirements of compact equipment. Heat generated by the windings is directly conducted to the outside through the frame, effectively reducing temperature rise and improving the motor's continuous output capability. Using adhesives or magnetic sleeves to fix the magnetic tiles enhances their stability and prevents loosening and detachment during high-speed operation. The design of the motor PCB board fitting snugly against the frame shortens the distance between power lines and signal transmission, reduces electromagnetic interference, achieves efficient heat dissipation, and makes the overall structure more compact, suitable for scenarios requiring high-precision control and high efficiency. Furthermore, the radial arrangement of the web allows for radial installation of the windings, optimizing magnetic field distribution and improving magnetic flux density and uniformity. The second flange is shorter than the first flange and has a gap, facilitating winding installation and maintenance while enhancing mechanical stability and heat dissipation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first structure of a frameless torque motor provided in one embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Cross-sectional view;

[0018] Figure 3 This is a schematic diagram of the second structure of a frameless torque motor provided in one embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of a single iron core and coil of a frameless torque motor provided in one embodiment of this utility model;

[0020] 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. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] A frameless torque motor, such as Figure 1-4 As shown, a preferred embodiment of the present invention includes a stator ring 1, a rotor core 2, and a winding 3;

[0026] 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.

[0027] 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.

[0028] A 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 composed of several individual iron cores 11, forming 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 equipped 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. This type of motor is designed 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.

[0029] 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 each individual iron core 11 has 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.

[0030] 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.

[0031] Preferably, each of the web plates 112 is provided with two skeletons 5, which are respectively located on both sides of the winding 3.

[0032] 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 1 or other heat dissipation components, thereby improving the motor's heat dissipation efficiency and extending the service life of the winding 3.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Preferably, the magnetic tile 4 is adhered to the outer peripheral surface of the rotor core 2 by an adhesive.

[0038] Specifically, the adhesive provides strong bonding force, ensuring that the magnet 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 magnet 4 to shift or fall off. The use of adhesive can effectively prevent this from happening and ensure the stable operation of the motor.

[0039] Using adhesive to fix the magnetic tiles 4 can simplify the installation process. Compared with mechanical fixing methods (such as screws, non-woven tape binding, etc.), the use of adhesive can reduce complex assembly steps and reduce production costs.

[0040] Preferably, the web plate 112 is arranged along the radial direction of the stator ring 1.

[0041] 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.

[0042] Preferably, the magnetic tile 4 is connected to the rotor core 2 via a magnetic tile sleeve.

[0043] 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.

[0044] 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.

[0045] The motor PCB board 6 has a ring structure. The internal wiring of the motor PCB board 6 is connected to the output terminal of the winding 3, making the winding 3 connected. The motor PCB board 6 is directly attached to the stator iron ring 1, which shortens the power line and signal transmission distance, reduces electromagnetic interference, and realizes closed-loop detection of rotor position through Hall element. The motor PCB board 6 can be made of a high thermal conductivity substrate, and the heat of the winding 3 is transferred to the heat dissipation coating on the PCB surface or an external heat sink through the frame 5, forming a direct heat dissipation path.

[0046] 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.

[0047] 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 frameless torque motor, characterized in that, Includes stator rings, rotor core, and 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.

2. The frameless torque motor according to claim 1, characterized in that, Each web plate is provided with two skeletons, which are respectively located on both sides of the winding.

3. The frameless torque motor according to claim 1, 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.

4. The frameless torque motor according to claim 1, characterized in that, The magnetic tiles are bonded to the outer circumferential surface of the rotor core using an adhesive.

5. The frameless torque motor according to claim 1, characterized in that, The web is arranged along the radial direction of the stator ring.

6. The frameless torque motor according to claim 1, characterized in that, The magnetic tile is connected to the rotor core via a magnetic tile sleeve.

7. The frameless torque motor according to claim 1, 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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