Single-piece assembled stator core structure and frameless torque motor applying same

Abstract

This utility model relates to the field of stator core technology, and more particularly to a single-unit assembled stator core structure and a frameless torque motor using the same. It includes a ring-shaped stator core formed by connecting multiple single stator cores end-to-end. A connecting assembly is fitted into two adjacent mating slots between two single stator cores. The connecting assembly includes a connecting housing with a transmission tensioning component installed inside. The transmission tensioning component has a transmission end and two tensioning ends connected to it respectively. The transmission end controls the synchronous expansion or contraction of the two tensioning ends connected to locking blocks. When the two locking blocks expand synchronously on both sides of the connecting housing, the outer surfaces of the two locking blocks abut against the inner groove surface of the mating slot. This utility model solves the problem that in the actual assembly process of existing stator core structures, due to the lack of an effective connecting assembly, the assembled stator core structure is easily scattered if an assembly error occurs.

Description

Technical Field

[0001] This utility model relates to the field of stator core structure technology, and in particular to a single-unit assembled stator core structure and a frameless torque motor using the same. Background Technology

[0002] In an electric motor, the stator refers to the stationary component. Its structure mainly consists of three parts: the stator core, the stator windings, and the frame. The core function of the stator is to generate a rotating magnetic field. The rotor, in turn, is cut by magnetic lines of force under the influence of this rotating magnetic field, thereby generating (output) current.

[0003] However, the existing assembled stator core structure has significant shortcomings in the installation process. During installation, the simple connection between the grooves and protrusions on both sides of each individual stator core provides insufficient clamping force. In practice, loosening easily occurs between the individual stator cores, causing deviations in the overall shape of the assembled stator core structure. Rework and repair not only consume substantial manpower and material resources but also delay production, leading to numerous adverse effects on production.

[0004] In view of the above problems, it is necessary to conduct in-depth research on the existing structure and its defects, and to carry out targeted improvements. Utility Model Content

[0005] One objective of this invention is to propose a single-unit assembled stator core structure to solve the problem mentioned in the background art that, in the actual assembly process of the stator core, due to the lack of an effective fixing mechanism, the assembled stator core is very easy to fall apart once an assembly error occurs.

[0006] Another objective of this utility model is to provide a frameless torque motor, including a stator and a rotor installed inside the stator; the stator adopts a single-unit assembled stator core structure as described above.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A single-unit assembled stator core structure includes multiple single stator cores. Each single stator core has symmetrically formed mating slots on both sides. The multiple single stator cores are connected end to end to form an annular stator core. A connecting component is fitted into two adjacent mating slots between two single stator cores.

[0009] The connecting assembly includes a connecting housing, inside which a transmission tensioning assembly is installed. The transmission tensioning assembly has a transmission end and two tensioning ends. The transmission end is located at one end of the connecting housing, and the two tensioning ends are symmetrically and movably arranged on both sides of the outer surface of the connecting housing, and each of the two tensioning ends is connected to a locking block.

[0010] The transmission end is used to control the synchronous expansion or contraction of the two tensioning ends, thereby driving the two locking blocks to expand or contract synchronously on both sides of the connecting housing. When the two locking blocks expand synchronously on both sides of the connecting housing, the outer surfaces of the two locking blocks abut against the inner groove surface of the mating groove.

[0011] Preferably, the docking groove includes a connecting sub-groove and a locking sub-groove that are interconnected, and the cross-sectional shape of the connecting sub-groove and the locking sub-groove is T-shaped;

[0012] The connecting housing and the locking blocks located on both sides have an H-shaped cross-section. The connecting housing is fitted into the connecting sub-groove, and the locking blocks are fitted into the locking sub-groove.

[0013] Preferably, the transmission tensioning assembly includes a screw;

[0014] A slider is threadedly connected to the shaft of the screw;

[0015] The slider and the two locking blocks are all hinged together by a connecting rod through a hinge seat, and the end of the connecting rod away from the slider is the tensioning end;

[0016] The two connecting rods are symmetrically arranged on both sides of the slider with the screw as the axis of symmetry.

[0017] Preferably, the screw is a bidirectional screw;

[0018] The bidirectional screw has a forward thread and a reverse thread respectively with the center as the dividing line;

[0019] The slider is threadedly connected to the forward thread and the reverse thread respectively;

[0020] The connecting rods are hinged to both sides of the two sliders and between the two locking blocks via the hinge seats.

[0021] Preferably, the two connecting rods on the two sliders are symmetrically arranged on both sides of the slider with the center of the bidirectional screw shaft as the axis of symmetry.

[0022] Preferably, one end of the bidirectional screw is the transmission end, and the transmission end is connected to a knob.

[0023] A frameless torque motor includes a stator and a rotor mounted inside the stator;

[0024] The stator includes a single-unit assembled stator core structure as described above. Each single stator core in the single-unit assembled stator core structure is equipped with a frame and wound with metal windings. A motor PCB board is installed on one side of the single-unit assembled stator core structure.

[0025] The rotor includes an inner and outer magnetic tile sleeve and a plurality of magnetic tiles, which are installed around the outer surface of the magnetic tile sleeve.

[0026] One of the above technical solutions has the following beneficial effects:

[0027] 1. Significantly Improved Fastening Force: Compared to traditional groove-protrusion mating, the transmission tensioning assembly provides active radial locking force, which improves the fastening force. Simultaneously, the synchronously expanding locking blocks ensure that pressure is evenly applied to the inner wall of the mating groove, avoiding localized stress concentration.

[0028] 2. Easy to install and disassemble: The entire locking process can be controlled through the transmission end, without the need for complicated tools or multiple people to work together, which greatly shortens the replacement time of individual iron cores and reduces downtime maintenance costs.

[0029] 3. Enhanced structural stability: The active locking force effectively resists vibration and mechanical impact during motor operation, reducing the risk of loosening. It avoids the gradual loosening caused by thermal expansion and contraction or vibration in traditional structures, significantly extending service life. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a single-unit assembled stator core structure according to this utility model;

[0031] Figure 2 This is a schematic diagram of the splicing of adjacent single stator cores in a single-unit assembled stator core structure of this utility model;

[0032] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0033] Figure 4 This is a schematic diagram of the connecting components in a single-unit assembled stator core structure of this utility model;

[0034] Figure 5 yes Figure 4 Horizontal cross-section;

[0035] Figure 6 yes Figure 4 Vertical cross-sectional view;

[0036] Figure 7 This is a structural schematic diagram of a frameless torque motor using a single-unit assembled stator core structure according to this utility model;

[0037] In the attached diagram: 1. Ring stator core; 2. Single stator core; 3. Connecting slot; 31. Connecting sub-slot; 32. Locking sub-slot; 4. Connecting assembly; 41. Connecting housing; 5. Transmission tensioning assembly; 51. Transmission end; 52. Tensioning end; 53. Screw; 54. Slider; 55. Hinge seat; 56. Connecting rod; 531. Forward thread; 532. Reverse thread; 6. Locking block; 7. Knob; 8. Single-unit assembled stator core structure; 9. Frame; 10. Metal winding; 11. Motor PCB bare board; 12. Magnet sleeve; 13. Magnet. Detailed Implementation

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figure 1As shown, a single-unit assembled stator core structure includes multiple single stator cores 2. Each single stator core 2 has symmetrically provided docking slots 3 on both sides. The multiple single stator cores 1 are connected end to end to form an annular stator core 1. A connecting component 4 is fitted into two adjacent docking slots 3 between two single stator cores 2.

[0043] The connecting assembly 4 includes a connecting housing 41, and a transmission tensioning assembly 5 is installed inside the connecting housing 41. The transmission tensioning assembly 5 has a transmission end 51 and two tensioning ends 52. The transmission end 51 is located at one end of the connecting housing 41, and the two tensioning ends 52 are symmetrically and movably arranged on both sides of the outer surface of the connecting housing 41, and the two tensioning ends 52 are respectively connected to a locking block 6.

[0044] The transmission end 51 is used to control the synchronous expansion or synchronous contraction of the two tensioning ends 52, thereby driving the two locking blocks 6 to expand or contract synchronously on both sides of the connecting housing 41. When the two locking blocks 6 expand synchronously on both sides of the connecting housing 41, the outer surfaces of the two locking blocks 6 abut against the inner groove surface of the docking groove 3.

[0045] like Figure 1-6 As shown, this modular stator core structure achieves tight locking and stable connection through the following mechanism: First, multiple modular stator cores 2 are connected end-to-end to form an annular stator core 1. Symmetrical mating slots 3 are opened on both sides of each modular core, and connecting components 4 are fitted into the mating slots 3 of adjacent modular cores. Next, the connecting housing 41, as the main body of the connecting component, is embedded in the mating slots 3 to ensure initial alignment of adjacent modular cores. The transmission end 51 is located at one end of the connecting housing 41 and can be operated using external tools such as screwdrivers and wrenches or automated machinery. Two tensioning ends 52 are symmetrically and movably arranged on both sides of the outer surface of the connecting housing 41 and are respectively connected to locking blocks 6. Specifically, when the transmission end 51 is rotated, the transmission tensioning component 5 drives the two tensioning ends 52 to synchronously expand or contract the two locking blocks 6. When the two locking blocks 6 move outward, they press against the inner wall of the mating slot 3, generating a strong radial locking force. When the two locking blocks 6 move inward, the locking is released, facilitating the disassembly of the modular core.

[0046] In summary, this modular stator core structure has the following advantages:

[0047] 1. Significantly improved fastening force: Compared to traditional groove-protrusion mating, the transmission tensioning assembly provides active radial locking force, which improves the fastening force. At the same time, the synchronously expanding locking block 6 ensures that the pressure is evenly applied to the inner wall of the mating groove 3, avoiding local stress concentration.

[0048] 2. Easy to install and disassemble: The entire locking process can be controlled through the transmission end 51, without the need for complicated tools or multiple people to work together, which greatly shortens the replacement time of individual iron cores and reduces downtime maintenance costs.

[0049] 3. Enhanced structural stability: The active locking force effectively resists vibration and mechanical impact during motor operation, reducing the risk of loosening. It avoids the gradual loosening caused by thermal expansion and contraction or vibration in traditional structures, significantly extending service life.

[0050] To further explain, the docking groove 3 includes a connecting sub-groove 31 and a locking sub-groove 32 that are interconnected, and the cross-sectional shape of the connecting sub-groove 31 and the locking sub-groove 32 is T-shaped;

[0051] The connecting housing 41 and the locking blocks 6 located on both sides have an H-shaped cross-section. The connecting housing 41 is fitted into the connecting sub-groove 31, and the locking blocks 6 are fitted into the locking sub-groove 32.

[0052] In other embodiments, such as Figure 4-6 As shown, the surface of the locking block 6 can be designed with a bevel or an arc, and the matching design with the inner wall of the locking sub-slot 32 ensures uniform contact even under different dimensional tolerances.

[0053] To further explain, the transmission tensioning assembly 5 includes a screw 53;

[0054] A slider 54 is threadedly connected to the shaft of the screw 53;

[0055] The slider 54 and the two locking blocks 6 are all hinged together by a connecting rod 56 through a hinge seat 55. The end of the connecting rod 56 away from the slider 54 is the tensioning end 52.

[0056] The two connecting rods 56 are symmetrically arranged on both sides of the slider 54 with the screw 53 as the axis of symmetry.

[0057] Furthermore, such as Figure 5 As shown, the transmission tensioning assembly 5 achieves synchronous expansion or contraction of the locking block through the above mechanical structure: by rotating the screw 53 with external tools such as screwdrivers or wrenches, the rotation of the screw 53 drives the slider 54 to move axially; for example, rotating the screw to the right moves the slider to the right. The movement of the slider drives the two connecting rods 56 to swing synchronously through the hinge seat 55. Compared with directly manually expanding the locking block, the screw drive can increase the locking force and is easier to operate.

[0058] Specifically, when the screw rotates in the forward direction, the connecting rod 56 pushes the locking block 6 to expand outward and press against the inner wall of the mating groove 3.

[0059] When the screw rotates in the opposite direction, the connecting rod 56 pulls the locking block 6 inward to retract and release the lock.

[0060] Since the two connecting rods 56 are symmetrical about the screw 53, the expansion or contraction of the locking block 6 is completely synchronized, avoiding uneven force on one side.

[0061] To further clarify, the screw 53 is a bidirectional screw;

[0062] The bidirectional screw has a forward thread 531 and a reverse thread 532 respectively, with the center as the dividing line;

[0063] The slider 54 is threaded onto the forward thread 531 and the reverse thread 532, respectively.

[0064] The connecting rods 56 are hinged to both sides of the two sliders 54 and between the two locking blocks 6 via the hinge seats 55.

[0065] like Figure 6 As mentioned above, since the traditional unidirectional screw only pushes the locking block through a slider on one side, while the bidirectional screw can generate double the locking force by having two sliders move in opposite directions simultaneously.

[0066] To further explain, the two connecting rods 56 on the two sliders 54 are symmetrically arranged on both sides of the sliders 54 with the center of the bidirectional screw shaft as the axis of symmetry.

[0067] Furthermore, such as Figure 6 As described above, due to the symmetry of the threads on the bidirectional screw, the connecting rods on the two sliders 54 are arranged in a mirror-symmetrical layout with the center of the bidirectional screw as the axis of symmetry, achieving the effect of double locking force and synchronization: when the bidirectional screw is rotated, the two sliders 54 move simultaneously in opposite directions, generating double the locking force and significantly improving connection stability. At the same time, the layout with the center of the bidirectional screw as the axis of symmetry ensures that the locking block 6 expands synchronously from both sides, avoiding deformation or loosening caused by uneven force on one side.

[0068] To further explain, one end of the bidirectional screw is the transmission end 51, and the transmission end 51 is connected to the knob 7.

[0069] Furthermore, such as Figure 4 As shown, knob 7 provides a clear indication of the rotation direction, such as an arrow mark, which makes it easy for users to quickly determine the locking or unlocking direction, thereby improving the ease of operation and transmission efficiency, thus shortening the assembly time of the stator core structure and reducing labor costs.

[0070] A frameless torque motor includes a stator and a rotor mounted inside the stator;

[0071] The stator includes a single-unit assembled stator core structure 8 as described above. Each single stator core 2 on the single-unit assembled stator core structure 8 is equipped with a frame 9 and a metal winding 10. A motor PCB board 11 is installed on one side of the single-unit assembled stator core structure 8.

[0072] The rotor includes a magnetic tile sleeve 12 arranged from the inside out and a plurality of magnetic tiles 13, the plurality of magnetic tiles 13 being mounted around the outer surface of the magnetic tile sleeve 12.

[0073] As described above, the single-unit assembled stator core structure 8 is composed of multiple single stator cores 2, each with a frame 9 and a metal winding 10. This assembly design allows for flexible adjustment of stator size and pole number to meet different power requirements. Simultaneously, the motor PCB board 11 is mounted on one side of the stator structure, serving as the carrier of the electronic control system, integrating drive circuits, sensor interfaces, and communication modules to achieve current control, magnetic field regulation, and signal processing. The magnetic tile sleeve 12 provides mechanical support for the rotor, and multiple magnetic tiles 13 are installed along its outer surface, forming a uniformly distributed magnetic field polarity. The magnetic tile 13 material, such as neodymium iron boron, ensures high magnetic energy product and stability.

[0074] like Figure 7 As shown, the working principle of the frameless torque motor is as follows: three-phase alternating current is supplied to the metal windings 10 through the motor PCB board 11. The current generates a time-varying magnetic field in the windings, which rotates at synchronous speed according to the law of electromagnetic induction. The rotating magnetic field interacts with the magnetic field of the rotor magnets 13, generating a Lorentz force that drives the rotor to rotate in the direction of the magnetic field. The advantage of the frameless design is that the stator and rotor have no mechanical connection, but are coupled only by electromagnetic force, reducing mechanical friction and vibration, and improving efficiency and lifespan.

[0075] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A single-unit assembled stator core structure, characterized in that, It includes multiple individual stator cores (2), each of which has symmetrically provided docking slots (3) on both sides. The multiple individual stator cores (1) are connected end to end to form an annular stator core (1). A connecting component (4) is installed in the two adjacent docking slots (3) between two individual stator cores (2). The connecting assembly (4) includes a connecting housing (41), and a transmission tensioning assembly (5) is installed inside the connecting housing (41). The transmission tensioning assembly (5) has a transmission end (51) and two tensioning ends (52). The transmission end (51) is located at one end of the connecting housing (41). The two tensioning ends (52) are symmetrically and movably arranged on both sides of the outer surface of the connecting housing (41), and the two tensioning ends (52) are respectively connected to locking blocks (6). The transmission end (51) is used to control the synchronous expansion or synchronous contraction of the two tensioning ends (52), thereby driving the two locking blocks (6) to expand or contract synchronously on both sides of the connecting housing (41). When the two locking blocks (6) expand synchronously on both sides of the connecting housing (41), the outer surfaces of the two locking blocks (6) abut against the inner groove surface of the docking groove (3).

2. The single-unit assembled stator core structure according to claim 1, characterized in that, The docking groove (3) includes a connecting sub-groove (31) and a locking sub-groove (32) that are interconnected. The cross-sectional shape of the connecting sub-groove (31) and the locking sub-groove (32) is T-shaped. The connecting housing (41) and the locking blocks (6) located on both sides have an H-shaped cross-section. The connecting housing (41) is fitted into the connecting sub-groove (31), and the locking blocks (6) are fitted into the locking sub-groove (32).

3. The single-unit assembled stator core structure according to claim 1, characterized in that, The transmission tensioning assembly (5) includes a screw (53); The screw (53) has a slider (54) threadedly connected to its shaft; The slider (54) and the two locking blocks (6) are all hinged together by a connecting rod (56) through a hinge seat (55). The end of the connecting rod (56) away from the slider (54) is the tension end (52). The two connecting rods (56) are symmetrically arranged on both sides of the slider (54) with the screw (53) as the axis of symmetry.

4. The single-unit assembled stator core structure according to claim 3, characterized in that, The screw (53) is a bidirectional screw; The bidirectional screw has a forward thread (531) and a reverse thread (532) respectively, with the center as the dividing point; The slider (54) is threadedly connected to the forward thread (531) and the reverse thread (532); The connecting rod (56) is hinged to both sides of the two sliders (54) and between the two locking blocks (6) via the hinge seat (55).

5. A single-unit assembled stator core structure according to claim 4, characterized in that, The two connecting rods (56) on the two sliders (54) are symmetrically arranged on both sides of the sliders (54) with the center of the bidirectional screw shaft as the axis of symmetry.

6. The single-unit assembled stator core structure according to claim 4, characterized in that, One end of the bidirectional screw is the transmission end (51), and the transmission end (51) is connected to a knob (7).

7. A frameless torque motor, characterized in that, Includes a stator and a rotor mounted inside the stator; The stator includes a single-unit assembled stator core structure (8) as described in any one of claims 1-6, each of the single-unit assembled stator core structures (8) having a frame (9) and a metal winding (10) installed on it, and a motor PCB board (11) being installed on one side of the single-unit assembled stator core structure (8). The rotor includes a magnetic tile sleeve (12) extending from the inside to the outside and a plurality of magnetic tiles (13), the plurality of magnetic tiles (13) being mounted around the outer surface of the magnetic tile sleeve (12).

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