A magnetic circuit optimization heat dissipation structure of a voice coil motor

Abstract

The application relates to the technical field of voice coil motors, in particular to a magnetic circuit optimization heat dissipation structure of a voice coil motor. The voice coil motor body is provided with a support frame at the bottom, the support frame is provided with an inclined plate in an inclined mode, the inclined plate is provided with heat dissipation through holes, the heat dissipation through holes are provided with placing racks fixedly connected to the inclined plate, the placing racks are provided with fan blades in a rotating mode, the placing racks are provided with micro motors in a fixed mode, and the output end of the micro motor is fixedly connected with the central shaft of the fan blade. In the traditional vertically-installed fan, part of the airflow may be blocked by the motor shell or structure to form a short circuit (that is, the airflow returns to the fan inlet without fully contacting the heat source). The inclined design can reduce such phenomenon, so that the airflow flows through the heat dissipation surface more smoothly, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of voice coil motor technology, and in particular to a magnetic circuit optimization heat dissipation structure for a voice coil motor. Background Technology

[0002] A voice coil motor (VCM) is a linear drive motor based on the Lorentz force principle. Due to its simple structure, fast response speed, and high control precision, it is widely used in scenarios that require fast and precise linear motion.

[0003] Most voice coil motor heat dissipation structures only dissipate heat from the bottom of the voice coil motor, failing to achieve adequate heat dissipation for the side walls. Therefore, this application proposes a magnetic circuit optimization heat dissipation structure for voice coil motors to improve heat dissipation performance. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide an optimized heat dissipation structure for the magnetic circuit of a voice coil motor, thereby solving the technical problems mentioned in the background art.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: a magnetic circuit optimization heat dissipation structure for a voice coil motor, comprising a voice coil motor body, a support frame at the bottom of the voice coil motor body, an inclined plate inclinedly arranged on the support frame, a heat dissipation through hole on the inclined plate, a placement frame fixedly connected to the inclined plate in the heat dissipation through hole, a fan blade rotatably arranged on the placement frame, a micro motor fixedly arranged on the placement frame, and the output end of the micro motor fixedly connected to the central shaft of the fan blade.

[0006] By adopting the above technical solution, in traditional vertically mounted fans, some airflow may be short-circuited due to obstructions from the motor housing or structure (i.e., airflow returns to the fan inlet without fully contacting the heat source). The tilted design can reduce this phenomenon, allowing airflow to flow more smoothly over the heat dissipation surface and improving heat exchange efficiency.

[0007] Furthermore, the support frame is provided with multiple sets of inclined plates, and each set of inclined plates is provided with fan blades.

[0008] By adopting the above technical solution, multiple sets of fan blades can work independently or operate in coordination to form parallel heat dissipation channels.

[0009] Furthermore, a streamlined channel is provided on the outer side of the voice coil motor body, and multiple sets of streamlined channels are arranged in a ring array on the outer side of the voice coil motor body.

[0010] By adopting the above technical solutions, the traditional motor housing surface is mostly flat or right-angled, which easily causes separation and turbulence when airflow passes through, resulting in energy loss and noise. The streamlined channel adopts a biomimetic design, which can guide airflow to smoothly adhere to the motor surface and reduce separation.

[0011] Furthermore, reinforcing components are provided between the inclined plates to improve stability.

[0012] Furthermore, the reinforcing component includes a first reinforcing rib and a second reinforcing rib fixedly connected to the inclined plate.

[0013] By adopting the above technical solution, the first and second reinforcing ribs are fixed between the inclined plates in a cross or parallel manner to form a triangular or truss-type support structure, which significantly improves the overall bending and torsional stiffness.

[0014] Furthermore, the first and second reinforcing ribs are directly fixed with support rods.

[0015] By adopting the above technical solution, the support rod and double reinforcing ribs form a spatial truss structure, which extends the planar bending resistance of traditional two-dimensional reinforcing ribs to three-dimensional space, significantly improving the overall torsional and shear stiffness.

[0016] In summary, this application includes the following beneficial technical effects: Reducing airflow short-circuiting: Traditional vertical fans, due to the vertical impact of airflow on the motor housing or structure, are prone to forming localized vortices or directly returning to the inlet (short-circuiting phenomenon), resulting in uneven airflow distribution on the heat dissipation surface. The inclined plate design allows airflow to flow at a specific angle, guiding the airflow around structural obstructions, extending the contact time between the airflow and the heat dissipation surface, and ensuring that heat is fully dissipated.

[0017] The heat dissipation holes on the inclined plate work in conjunction with the fan blades to form a localized enhanced heat dissipation area. For example, near high heat sources such as coils, the fan blades can rotate faster to create a localized high-pressure airflow, specifically enhancing heat dissipation and avoiding the localized overheating problem caused by heat concentration in traditional solutions.

[0018] The tilted plate angle mimics the streamlined structure of bird wings or fish bodies, reducing airflow separation points and decreasing turbulence and wind resistance. Compared to traditional right-angle structures, airflow resistance is significantly reduced, motor operation is smoother, and noise is lower, meeting the low-noise requirements of precision equipment (such as medical imaging and aerospace).

[0019] The micro motor can drive the fan blades to adjust the speed independently. When the load is low, the speed is reduced to reduce the noise generated by the airflow impact; when the load is high, the rotation is accelerated to balance heat dissipation needs and noise control, achieving compatibility between quiet operation and efficient heat dissipation.

[0020] Three-dimensional spatial truss structure: The support frame and the inclined plate form a truss structure, which offsets thermal stress through coordinated deformation when the motor temperature rises, avoiding structural deformation or fan blade collision caused by thermal expansion. For example, the inclined plate can be finely adjusted at high temperatures to maintain a stable airflow path, while improving overall bending stiffness and adapting to high-speed vibration or impact load environments.

[0021] The reinforcing components (such as support rods) are designed to break under overload conditions. When the stress exceeds the safety threshold, they automatically break, prioritizing the protection of the motor body from damage and reducing maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure in the embodiment; Figure 2 This is a schematic diagram of the inclined plate structure in the embodiment.

[0023] Reference numerals: 1. Voice coil motor body; 11. Streamlined channel; 2. Support frame; 21. Inclined plate; 22. Placement frame; 23. Fan blade; 24. Micro motor; 3. First reinforcing rib; 31. Second reinforcing rib; 32. Support rod. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings.

[0025] Example, refer to Figure 1 as well as Figure 2 A magnetic circuit optimization heat dissipation structure for a voice coil motor includes a voice coil motor body 1, a support frame 2 at the bottom of the voice coil motor body 1, an inclined plate 21 inclinedly mounted on the support frame 2, heat dissipation holes on the inclined plate 21, a mounting bracket 22 fixedly connected to the inclined plate 22 within the heat dissipation holes, a fan blade 23 rotatably mounted on the mounting bracket 22, and a micro motor 24 fixedly mounted on the mounting bracket 22. The output end of the micro motor 24 is fixedly connected to the central shaft of the fan blade 23. In traditional vertically mounted fans, some airflow may be short-circuited due to obstruction by the motor housing or structure (i.e., airflow returns to the fan inlet without sufficient contact with the heat source). The inclined design reduces this phenomenon, allowing airflow to flow more smoothly across the heat dissipation surface and improving heat exchange efficiency.

[0026] In this application, a fan can also be installed at the bottom of the support frame 2 (not shown in the figure).

[0027] In this embodiment, the support frame 2 has multiple sets of inclined plates 21, and each set of inclined plates 21 is equipped with fan blades 23. The multiple sets of fan blades 23 can work independently or work together to form parallel heat dissipation channels.

[0028] In this embodiment, a streamlined channel 11 is provided on the outer side of the voice coil motor body 1. Multiple sets of streamlined channels 11 are arranged in a circular array on the outer side of the voice coil motor body 1. Traditional motor housings are mostly planar or right-angled structures, which easily cause separation and turbulence when airflow passes through, leading to energy loss and noise. The streamlined channel 11 adopts a biomimetic design, which can guide airflow to smoothly adhere to the motor surface, reducing separation.

[0029] In this embodiment, a reinforcing assembly for improving stability is provided between the inclined plates 21. The reinforcing assembly includes a first reinforcing rib 3 and a second reinforcing rib 31 fixedly connected directly between the inclined plates 21. The first reinforcing rib 3 and the second reinforcing rib 31 are fixed between the inclined plates 21 in a cross or parallel manner, forming a triangular or truss-like support structure, which significantly improves the overall bending and torsional stiffness. A support rod 32 is directly fixed to the first reinforcing rib 3 and the second reinforcing rib 31. The support rod 32 and the double reinforcing ribs form a spatial truss structure, extending the planar bending resistance of traditional two-dimensional reinforcing ribs to three-dimensional space, which significantly improves the overall torsional and shear stiffness.

[0030] Specific implementation process: When the voice coil motor starts, the coil generates a Lorentz force in the magnetic field, driving the motor to move. The Joule heat generated by the current passing through the coil, as well as mechanical friction and hysteresis loss, cause the internal temperature of the motor to rise rapidly. At this time, the heat dissipation system is activated simultaneously: the micro motor 24 mounted at an angle on the support frame 2 drives the fan blades 23 to rotate at high speed. The inclined plate 21 is designed at a specific angle to make the airflow flow along the inclined direction, avoiding the airflow short-circuit problem of traditional vertical fans, extending the contact time between the airflow and the motor surface, and improving the heat exchange efficiency. The fan blades 23 on multiple sets of inclined plates 21 can work independently or in concert. The speed is dynamically adjusted according to the temperature distribution in different areas of the motor by speed regulation. When running at high speed, the fan blades 23 in the heat source area near the coil accelerate and enhance local heat dissipation. When the load is low, some fan blades 23 stop rotating to reduce energy consumption. The parallel heat dissipation channel design reduces airflow interference and makes the surface temperature of the motor evenly distributed.

[0031] Meanwhile, the annular streamlined channel 11 on the outer side of the voice coil motor body 1 adopts a biomimetic teardrop or airfoil cross-section to simulate the airflow adhesion effect of bird wings or fish bodies, thereby shifting the airflow separation point backward, reducing the drag coefficient, minimizing turbulence and energy loss, and reducing operating noise to meet the low-noise requirements of precision equipment. The reinforcing ribs on the support frame 2 and the support rod 32 form a three-dimensional spatial truss structure, which offsets thermal stress through synergistic deformation when the motor temperature rises, preventing the fan blades 23 from colliding with the mounting frame 22, while also improving the overall bending stiffness to ensure stable operation of the heat dissipation system under high-speed vibration or impact loads.

[0032] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A magnetic circuit optimized heat dissipation structure for a voice coil motor, characterized in that, The device includes a voice coil motor body (1), a support frame (2) at the bottom of the voice coil motor body (1), an inclined plate (21) on the support frame (2) at an angle, a heat dissipation hole on the inclined plate (21), a placement frame (22) fixedly connected to the inclined plate in the heat dissipation hole, a fan blade (23) rotatably mounted on the placement frame (22), and a micro motor (24) fixedly mounted on the placement frame (22). The output end of the micro motor (24) is fixedly connected to the central axis of the fan blade (23).

2. The optimized heat dissipation structure for a voice coil motor according to claim 1, characterized in that, The support frame (2) has multiple sets of inclined plates (21), and each set of inclined plates (21) is provided with fan blades (23).

3. The optimized heat dissipation structure for a voice coil motor according to claim 2, characterized in that, The voice coil motor body (1) has a streamlined channel (11) on its outer side, and the streamlined channel (11) is arranged in multiple sets in a ring array on the outer side of the voice coil motor body (1).

4. The optimized heat dissipation structure for a voice coil motor according to claim 1, characterized in that, Reinforcing components for improving stability are provided between the inclined plates (21).

5. The optimized heat dissipation structure for a voice coil motor according to claim 4, characterized in that, The reinforcing assembly includes a first reinforcing rib (3) and a second reinforcing rib (31) that are fixedly connected to the inclined plate (21).

6. The optimized heat dissipation structure for a voice coil motor according to claim 5, characterized in that, The first reinforcing rib (3) and the second reinforcing rib (31) are directly fixed with support rods (32).

Images