A U-shaped integrated heat dissipation structure and a linear motor actuator

Abstract

The application relates to the technical field of heat dissipation structures, in particular to a U-shaped integrated heat dissipation structure and a linear motor actuator. The U-shaped integrated heat dissipation structure comprises a U-shaped shell, the cross section of the U-shaped shell is continuously closed U-shaped, a T-shaped partition plate is integrally arranged in an inner cavity, the T-shaped partition plate divides the inner cavity into a motor area, a screw rod area and a weak current area, the weak current area is arranged on the outer sides of the U-shaped shell, the screw rod area and the weak current area are arranged in the inner part of the U-shaped shell, and the screw rod area and the weak current area are arranged on the upper and lower sides of the T-shaped partition plate. The U-shaped integrated heat dissipation structure can be once extrusion formed, has no welding seam, can simultaneously bear, dissipate heat and shield, and solves the contradiction among the envelope, weight, heat dissipation and reliability.

Description

Technical Field

[0001] This application relates to the field of heat dissipation structure technology, and in particular to a U-shaped integrated heat dissipation structure and a linear motor actuator. Background Technology

[0002] Existing linear motor actuators mostly employ a cylindrical shell structure with external heat sinks, resulting in numerous parts, welds, and heavy weight. Furthermore, within an extreme envelope of Φ36mm×232mm, they struggle to simultaneously meet requirements such as thrust ≥3500N, time ≤1.5s, mechanical stroke ≥140.5mm, temperature rise ≤25K, and IP65 sealing. Therefore, a lightweight structural design that integrates structural load-bearing, thermal management, and electromagnetic shielding is needed. Utility Model Content

[0003] This application provides a U-shaped integrated heat dissipation structure and a linear motor actuator, which features lightweight design that combines structural load-bearing, heat management, and electromagnetic shielding functions.

[0004] To achieve the above and other related objectives, this utility model provides a U-shaped integrated heat dissipation structure, comprising: a U-shaped shell, wherein the cross-section of the U-shaped shell is a continuous closed U-shape, and a T-shaped partition is integrally provided in the inner cavity. The T-shaped partition divides the inner cavity into a motor area, a lead screw area, and a low-voltage area. The low-voltage area is located on both sides of the outer surface of the U-shaped shell, and the lead screw area and the low-voltage area are both located inside the U-shaped shell, and the lead screw area and the low-voltage area are located on the upper and lower sides of the T-shaped partition.

[0005] In one embodiment of this utility model, the U-shaped shell is used simultaneously as a structural support, a heat dissipation channel, and an electromagnetic shield.

[0006] In one embodiment of this utility model, the U-shaped shell is formed by a single AL7075-T6 aluminum alloy extruded profile through a five-axis single clamping process to form an integral shell without welds.

[0007] In one embodiment of this utility model, the outer contour envelope size of the U-shaped shell is no greater than Φ36mm×232mm.

[0008] In one embodiment of this utility model, the U-shaped opening end of the U-shaped housing is provided with a flange edge for connecting to external equipment.

[0009] In one embodiment of this utility model, the flange edge and the U-shaped shell are integrally extruded.

[0010] In one embodiment of the present invention, the outer surface of the U-shaped shell has a hard anodized layer.

[0011] In one embodiment of this invention, the thickness of the anodic oxide layer is 15–25 μm.

[0012] In one embodiment of the present invention, a heat dissipation vent is further included, which is disposed at the bottom of the U-shaped housing.

[0013] This utility model also includes a linear motor actuator, comprising the aforementioned U-shaped integrated heat dissipation structure, a stator installed in the motor area, a ball screw pair installed in the lead screw area, and a position feedback board installed in the low-voltage area.

[0014] As described above, the U-shaped integrated heat dissipation structure and linear motor actuator of this utility model have the following beneficial effects:

[0015] (1) The U-shaped integrated heat dissipation structure of this utility model is formed by a single AL7075-T6 extruded profile through a five-axis one-time clamping process. The cross section is a continuous U-shape without weld seams, forming a closed bending section. The inner cavity is integrated with a T-shaped partition, which divides the space into a motor area, a lead screw area, and a weak current area. This utility model can be extruded in one piece, without weld seams, and can simultaneously bear load, dissipate heat, and shield, thus solving the contradiction between envelope, weight, heat dissipation, and reliability.

[0016] (2) The U-shaped integrated heat dissipation structure of this utility model can improve the reliability and production efficiency of the structure by reducing the number of parts and welds, while reducing costs, adapting to the trend of sustainable development, and providing technical support for future aerospace missions.

[0017] (3) The U-shaped integrated heat dissipation structure of this utility model uses AL7075-T6 aluminum alloy. This material has high strength, light weight and good thermal conductivity, and is suitable for structures that require lightweighting and heat dissipation. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a U-shaped integrated heat dissipation structure according to an embodiment of the present invention;

[0019] Figure 2 This is a structural diagram of a U-shaped integrated heat dissipation structure according to another embodiment of the present utility model;

[0020] Figure 3 This is a structural diagram of a U-shaped integrated heat dissipation structure according to another embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of a U-shaped integrated heat dissipation structure according to an embodiment of the present invention.

[0022] Component designation explanation

[0023] 10. U-shaped housing; 20. T-shaped partition; 21. Motor area; 22. Lead screw area; 23. Low voltage area; 11. Flange edge. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] Please see Figure 1 , Figure 2 , Figure 3 , Figure 1 This is a structural diagram of a U-shaped integrated heat dissipation structure according to an embodiment of the present invention; Figure 2 This is a structural diagram of a U-shaped integrated heat dissipation structure according to another embodiment of the present utility model; Figure 3 This is a structural diagram of a U-shaped integrated heat dissipation structure according to another embodiment of the present invention. This U-shaped integrated heat dissipation structure can be used in the actuators of aerospace optical cabin motors. The development background of the U-shaped integrated heat dissipation shell structure design stems from the urgent need in the aerospace electromechanical servo field for small-volume, high-thrust, and highly reliable linear drive devices, especially for spacecraft components operating in extreme environments, such as space optical cabins and solar panels. Existing technologies with cylindrical shells and external heat sinks suffer from problems such as numerous parts, welds, and heavy weight, making it difficult to meet performance requirements under extreme size constraints, including thrust, time, mechanical travel, temperature rise, and sealing level. Therefore, developing a lightweight design scheme that integrates structural load-bearing, heat management, and electromagnetic shielding functions is particularly important. This not only overcomes the limitations of existing technologies but also improves structural reliability and production efficiency by reducing the number of parts and welds, while simultaneously reducing costs, adapting to the trend of sustainable development, and providing technical support for future aerospace missions.

[0027] This utility model discloses a U-shaped integrated heat dissipation structure, comprising: a U-shaped housing 10, the cross-section of which is a continuous closed U-shape, and an integrally provided T-shaped partition 20 in the inner cavity. The T-shaped partition 20 divides the inner cavity into a motor area 21, a lead screw area 22, and a low-voltage area 23. The low-voltage area 23 is located on both sides of the outer surface of the U-shaped housing 10, and both the lead screw area 22 and the low-voltage area 23 are located inside the U-shaped housing 10, and are located on the upper and lower sides of the T-shaped partition 20.

[0028] Specifically, the U-shaped shell 10 serves as a structural support, a heat dissipation channel, and an electromagnetic shield.

[0029] Specifically, the U-shaped shell 10 is formed by a single AL7075-T6 aluminum alloy extruded profile through a five-axis single clamping process to create an integral shell without welds.

[0030] In one embodiment of this utility model, the U-shaped integrated heat dissipation structure of this utility model uses AL7075-T6 aluminum alloy as the shell material. This material has high strength, light weight and good thermal conductivity, making it suitable for structures that require lightweighting and heat dissipation.

[0031] In one embodiment of this utility model, a U-shaped integrated heat dissipation structure is manufactured using a five-axis machining center in a single clamping process to ensure high precision and achieve complex shapes while reducing processing time and costs.

[0032] Specifically, the outer contour envelope size of the U-shaped shell 10 is no greater than Φ36mm×232mm.

[0033] Specifically, the U-shaped opening end of the U-shaped housing 10 is provided with a flange edge 11 for connecting to external equipment.

[0034] Specifically, the flange edge 11 and the U-shaped shell 10 are integrally extruded.

[0035] Specifically, the outer surface of the U-shaped housing 10 has a hard anodized layer.

[0036] Specifically, the thickness of the anodic oxide layer is 15 to 25 μm, and the thickness of the anodic oxide layer may be, but is not limited to, 15 μm, 18 μm, 20 μm, 22 μm, or 25 μm.

[0037] Specifically, it also includes a heat dissipation vent 30, which is located at the bottom of the U-shaped housing 10.

[0038] In one embodiment of this utility model, a U-shaped integrated heat dissipation structure is provided:

[0039] The structural design adopts:

[0040] The U-shaped cross-section design of the U-shaped shell 10 provides good bending resistance and increases the stability of the structure.

[0041] The T-shaped partition 20 in the inner cavity helps to isolate different functional areas, such as the motor area 21, the lead screw area 22, and the low-voltage area 23, which helps to improve the overall electromagnetic compatibility and heat dissipation efficiency.

[0042] Connection method:

[0043] Since the U-shaped integrated heat dissipation structure of this utility model is formed in one piece, the internal partition and the external structure are connected by the continuity of the material itself, without the need for additional welding or bolt connection, which simplifies the assembly process.

[0044] Heat dissipation performance:

[0045] The U-shaped structure and internal cavity design of the U-shaped housing 10 facilitate airflow and improve heat dissipation efficiency. Under 800W stall conditions, the temperature rise is ≤25K, meeting the requirements for high-performance heat dissipation.

[0046] Electromagnetic shielding:

[0047] The closed U-shaped structure of the U-shaped housing 10 and the T-shaped partition 20 of the inner cavity design help to improve the electromagnetic shielding effect and protect the internal electronic components from external electromagnetic interference.

[0048] This utility model also provides a linear motor actuator, including the above-mentioned U-shaped integrated heat dissipation structure, a stator installed in the motor area 21, a ball screw pair installed in the lead screw area 22, and a position feedback board installed in the weak current area 23.

[0049] In one embodiment of this utility model, a U-shaped integrated heat dissipation structure of this utility model is experimentally verified as follows:

[0050] a) Thermal vacuum cycling: 100 cycles at -70℃ to +120℃, with no cracks in the shell and no leaks in the seal;

[0051] b) 800W stalled rotor for 15s: winding peak temperature 180.2℃, outer wall temperature 95℃, temperature rise 25K (target <110K);

[0052] c) 14g random vibration (20–2000Hz, 120s): Maximum stress of shell 210MPa < material yield 505MPa, structure intact;

[0053] d) Thrust test: After 100,000 consecutive cycles under a load of 3500N, the shell showed no permanent deformation and the perpendicularity of the mounting surface remained at 2.1′.

[0054] In one embodiment of this utility model, the results of a U-shaped integrated heat dissipation structure are as follows:

[0055] Casing weight: 178g (57g less than the original design, -24%);

[0056] Number of parts: 9 (-25%);

[0057] Assembly time: reduced from 45 minutes to 29 minutes.

[0058] In one embodiment of this utility model, the U-shaped integrated heat dissipation structure of this utility model is applied and extended as follows:

[0059] The present invention relates to a U-shaped integrated heat dissipation structure, the structural design of which has been completed along with the K233115 motor actuator.

[0060] In summary, this utility model presents a U-shaped integrated heat dissipation structure, which is formed by a single AL7075-T6 extruded profile through a five-axis one-time clamping process. The cross-section is a continuous U-shape without weld seams, forming a closed bending-resistant section. The inner cavity is integrally equipped with a T-shaped partition, which divides the space into a motor area, a lead screw area, and a low-voltage area. This utility model can be extruded in one step, without weld seams, and can simultaneously bear loads, dissipate heat, and shield, thus solving the contradiction between envelope, weight, heat dissipation, and reliability.

[0061] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not 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 application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. 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.

[0066] Although embodiments of this application have been shown and described above, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A U-shaped integrated heat dissipation structure, characterized in that, include: A U-shaped housing (10) has a continuous closed U-shaped cross-section and an integrally provided T-shaped partition (20) in the inner cavity. The T-shaped partition (20) divides the inner cavity into a motor area (21), a lead screw area (22), and a low-voltage area (23). The low-voltage area (23) is located on the outer sides of the U-shaped housing (10). The lead screw area (22) and the low-voltage area (23) are both located inside the U-shaped housing (10), and the lead screw area (22) and the low-voltage area (23) are located on the upper and lower sides of the T-shaped partition (20).

2. The U-shaped integrated heat dissipation structure according to claim 1, characterized in that: The U-shaped shell (10) is used as a structural support, a heat dissipation channel, and an electromagnetic shield.

3. The U-shaped integrated heat dissipation structure according to claim 1, characterized in that: The U-shaped shell (10) is formed by a single AL7075-T6 aluminum alloy extruded profile through a five-axis one-time clamping process to form an integral shell without welds.

4. The U-shaped integrated heat dissipation structure according to claim 3, characterized in that: The outer contour envelope size of the U-shaped shell (10) is no greater than Φ36mm×232mm.

5. The U-shaped integrated heat dissipation structure according to any one of claims 1 to 4, characterized in that: The U-shaped opening end of the U-shaped housing (10) is provided with a flange edge (11) for connecting to external equipment.

6. The U-shaped integrated heat dissipation structure according to claim 5, characterized in that: The flange edge (11) and the U-shaped shell (10) are integrally extruded.

7. The U-shaped integrated heat dissipation structure according to claim 1, characterized in that: The outer surface of the U-shaped shell (10) has a hard anodized layer.

8. The U-shaped integrated heat dissipation structure according to claim 7, characterized in that: The thickness of the anodic oxide layer is 15–25 μm.

9. The U-shaped integrated heat dissipation structure according to claim 1, characterized in that: It also includes a heat dissipation vent (30), which is located at the bottom of the U-shaped housing (10).

10. A linear motor actuator, characterized in that, It includes the U-shaped integrated heat dissipation structure as described in any one of claims 1-9, a stator installed in the motor area (21), a ball screw pair installed in the lead screw area (22), and a position feedback board installed in the weak current area (23).

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