Linear motor, suspension assembly and vehicle

Abstract

The utility model relates to a linear motor, a suspension assembly and a vehicle, the linear motor comprises a casing and heat dissipation fins, and the heat dissipation fins are arranged on the outer side of the casing for heat dissipation. According to the linear motor, the contact area between the shell and the external environment is increased through the heat dissipation fins, the heat exchange efficiency is improved, the use of a complex liquid cooling system is avoided, and the system complexity and cost are reduced while the heat dissipation requirement is met.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more particularly to a linear motor, a suspension assembly, and a vehicle. Background Technology

[0002] Linear motors generate heat during operation, primarily from winding copper losses, core iron losses, and mechanical friction. If this heat cannot be dissipated in time, it will lead to aging of the insulation material, increased winding resistance, and decreased mechanical performance, severely impacting the reliability and performance of the linear motor, and even shortening its lifespan and causing malfunctions. Therefore, controlling the temperature of linear motors is crucial.

[0003] Some linear motors rely on natural cooling through heat exchange between the housing and the external environment. However, the heat dissipation capacity of these linear motors is limited, making them suitable only for low-power linear motors or applications where temperature rise is not significant. As the power of linear motors increases, natural cooling becomes insufficient to meet the heat dissipation requirements. In such cases, a liquid cooling system is typically installed inside the housing to improve the heat dissipation capacity of the linear motor. However, liquid cooling systems have complex structures, occupy a significant amount of space within the housing, and affect the design space of components such as windings. They also require coolant circulation devices and sealing structures, further increasing complexity and cost. Utility Model Content

[0004] This application provides a linear motor, suspension assembly, and vehicle that reduces system complexity and cost while meeting heat dissipation requirements, thereby at least partially solving the aforementioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a linear motor is provided, comprising:

[0006] The casing; and,

[0007] Heat dissipation fins are provided on the outside of the housing for heat dissipation.

[0008] Optionally, the heat dissipation fins extend circumferentially along the housing.

[0009] Optionally, the heat dissipation fins are arranged around the housing along the circumference of the housing.

[0010] Optionally, the heat dissipation fins are provided in multiples, and the multiple heat dissipation fins are arranged at intervals along the axial direction of the housing.

[0011] Optionally, the heat dissipation fins have two surfaces disposed opposite each other in the axial direction of the housing, and at least one surface of the heat dissipation fins has an angle with the radial cross section of the housing.

[0012] Optionally, the included angle is between 15° and 45°.

[0013] Optionally, the housing and the heat dissipation fins are integrally formed.

[0014] Optionally, the linear motor further includes a first magnetic field element, a second magnetic field element, and a central rod. One of the first magnetic field element and the second magnetic field element includes a winding, and the other includes a magnet. The central rod is movably inserted into the housing. The first magnetic field element is connected to the outer periphery of the central rod, and the second magnetic field element is connected to the inner periphery of the housing. The first magnetic field element and the second magnetic field element are spaced apart in the radial direction of the housing to form a first air zone.

[0015] Along the axial direction of the housing, the two ends of the first magnetic field element are respectively spaced apart from the housing to form two second gas domains. The two second gas domains are respectively used to communicate with the outside world, and the first gas domain is connected to the two second gas domains.

[0016] Optionally, the housing is provided with a vent hole for connecting to the outside and at least one of the second air zones.

[0017] Optionally, the vent includes a first vent and a second vent, which are spaced apart along the axial direction of the housing. The first vent is used to connect to the outside and a second air zone, and the second vent is used to connect to the outside and another second air zone.

[0018] Optionally, multiple first vent holes are provided, and the multiple first vent holes are arranged circumferentially along the housing; and / or,

[0019] The second vent is provided in multiple ways, and the multiple second vents are arranged circumferentially along the housing.

[0020] Optionally, the center rod has a first end extending out of the housing, and the center rod also has a first inner cavity and a first ventilation hole opened at the first end. The first ventilation hole communicates with the first inner cavity, and the first inner cavity also communicates with a second air zone. The ventilation hole is used to communicate with the outside and another second air zone.

[0021] Optionally, the central rod also has a second end located inside the housing, the second end having a first opening communicating with the first inner cavity;

[0022] The linear motor also includes a guide rod, which is coaxially arranged with the center rod. The guide rod has a second inner cavity. One end of the guide rod passes through the first opening into the first inner cavity and has a second opening that connects the first inner cavity and the second inner cavity. The other end of the guide rod is connected to the inner side of the housing and has a second ventilation hole that connects the second inner cavity and a second air zone.

[0023] Optionally, the guide rod includes a rod body and a connecting seat connected to one end of the rod body. The connecting seat is connected to the inner side of the housing. The second inner cavity is located in the rod body, and the second ventilation hole is located in the connecting seat.

[0024] Optionally, the linear motor further includes a first venting element, which blocks the vent hole; and / or,

[0025] The linear motor also includes a second ventilator, which is configured to block the first ventilation hole.

[0026] According to a second aspect of this application, a suspension assembly is provided, including a linear motor as described in any of the above claims.

[0027] According to a third aspect of this application, a vehicle is provided, including a linear motor as described in any of the above claims or a suspension assembly as described above.

[0028] In the linear motor of this application embodiment, by setting heat dissipation fins on the outer side of the housing, the contact area between the housing and the external environment is significantly increased, thereby improving heat exchange efficiency. This design allows the linear motor to more effectively transfer internally generated heat to the external environment even under high-power operating conditions, avoiding excessive temperature rise. Since the heat dissipation fin design does not require complex coolant circulation devices and sealing structures, it reduces the overall complexity and cost of the system, while also reducing the space required inside the housing, providing greater flexibility for the design of components such as windings. In addition, since there are no leakage or corrosion problems that may exist in liquid cooling systems, the use of heat dissipation fins reduces maintenance workload and makes the maintenance process simpler and easier. This design can be applied to a wider range of linear motor power levels without significantly increasing cost and complexity, especially for those applications that require good heat dissipation but are not suitable for installing liquid cooling systems. In summary, the linear motor of this application embodiment increases the contact area between the housing and the external environment by using heat dissipation fins, improves heat exchange efficiency, avoids the use of complex liquid cooling systems, and reduces system complexity and cost while meeting heat dissipation requirements.

[0029] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0032] Figure 1 This is a front view schematic diagram of a first structure of a linear motor provided in an exemplary embodiment of this disclosure;

[0033] Figure 2 yes Figure 1 A cross-sectional view of point AA in the diagram;

[0034] Figure 3 yes Figure 2 A magnified view of part B in the diagram;

[0035] Figure 4 This is a cross-sectional schematic diagram of a second structure of a linear motor provided in an exemplary embodiment of this disclosure;

[0036] Figure 5 yes Figure 4 A magnified view of a portion of C in the diagram;

[0037] Figure 6 yes Figure 4 A magnified view of a portion of the D area;

[0038] Figure 7 yes Figure 4 A magnified diagram of part E in the image;

[0039] Figure 8 yes Figure 4 A magnified schematic diagram of a portion of F in the diagram;

[0040] Figure 9 This is a cross-sectional schematic diagram of a third structure of a linear motor provided in an exemplary embodiment of this disclosure;

[0041] Figure 10 yes Figure 9 A magnified schematic diagram of a portion of G in the image;

[0042] Figure 11 yes Figure 9 A magnified schematic diagram of a portion of H in the image.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Linear motor; 1. Housing; 11. Vent hole; 111. First vent hole; 112. Second vent hole; 2. Heat dissipation fins; 21. Surface; 3. First magnetic field element; 31. Winding; 32. Iron core; 4. Second magnetic field element; 41. Magnet; 5. Center rod; 51. First inner cavity; 52. First ventilation hole; 53. First opening; 6. Second air zone; 7. First air zone; 8. Guide rod; 81. Second inner cavity; 82. Second ventilation hole; 83. Second opening; 84. Rod body; 85. Connecting seat; 9. First vent; 10. Second vent; 12. Mounting arm; 13. Tray. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0046] This application provides a linear motor. Figures 1 to 11 A schematic diagram of the structure of a linear motor provided in an embodiment of this application.

[0047] See Figures 1 to 3 The linear motor 100 includes a housing 1 and heat dissipation fins 2, which are located on the outside of the housing 1 for heat dissipation.

[0048] In the embodiments of this application, by providing heat dissipation fins 2 on the outer side of the housing 1, the contact area between the housing 1 and the external environment is significantly increased, thereby improving heat exchange efficiency. This design allows the linear motor 100 to more effectively transfer the internally generated heat to the external environment even under high-power operating conditions, avoiding excessive temperature rise. Since the design of the heat dissipation fins 2 does not require a complex coolant circulation device and sealing structure, the overall complexity and cost of the system are reduced, while also reducing the space required inside the housing 1, providing greater flexibility for the design of components such as the winding 31. In addition, since there are no leakage, corrosion, or other problems that may exist in liquid cooling systems, the use of heat dissipation fins 2 reduces maintenance workload and makes the maintenance process simpler and easier. This design can be applied to a wider range of power levels of the linear motor 100 without significantly increasing cost and complexity, especially for those applications that require good heat dissipation but are not suitable for installing liquid cooling systems. In summary, the linear motor 100 of the embodiments of this application increases the contact area between the housing 1 and the external environment by using heat dissipation fins 2, improves heat exchange efficiency, avoids the use of complex liquid cooling systems, and reduces system complexity and cost while meeting heat dissipation requirements.

[0049] In some embodiments, see Figures 1 to 3 The heat dissipation fins 2 extend circumferentially along the housing 1. In these embodiments, the heat dissipation fins 2 extend circumferentially along the housing 1, forming a heat dissipation band around the housing 1, which can more evenly transfer heat from various parts of the linear motor 100. This not only helps reduce local overheating but also maintains the uniformity of the internal temperature of the linear motor 100, thereby significantly improving operational stability and reliability. Simultaneously, since the linear motor 100 typically generates axial airflow during operation, the circumferentially arranged heat dissipation fins 2, by increasing the contact area intersecting with the airflow direction, can more efficiently exchange heat with the flowing air. This design fully utilizes the airflow generated by the linear motor 100 itself, further improving heat dissipation efficiency. It should be noted that the circumferential extension of the heat dissipation fins 2 along the housing 1 does not limit whether the heat dissipation fins 2 form a complete heat dissipation ring. The heat dissipation fins 2 may partially surround the housing 1, or their arrangement may be discontinuous; the specific design depends on the heat dissipation requirements and structural constraints.

[0050] In some embodiments, heat dissipation fins 2 are arranged around the housing 1 circumferentially. In these embodiments, the heat dissipation fins 2 are arranged around the housing 1 circumferentially to form a complete heat dissipation ring. This design, by maximizing the contact area with the external environment, can more evenly dissipate the heat generated inside the linear motor 100, ensuring that heat is effectively transferred from all directions of the housing 1, thereby further improving heat exchange efficiency. The surrounding heat dissipation fins 2 can more evenly distribute heat and avoid the occurrence of local hot spots, which is crucial for maintaining the consistency of the internal temperature of the linear motor 100. This helps to reduce mechanical stress and material aging problems caused by temperature differences, thereby improving the overall stability and service life of the linear motor 100. In addition, the surrounding heat dissipation fins 2 can also enhance the overall structural strength of the housing 1 to a certain extent, making the housing 1 more stable during operation and better able to resist external impacts and vibrations, thereby improving the reliability and service life of the linear motor 100. At the same time, the surrounding heat dissipation fins 2 usually have a relatively regular shape, which facilitates alignment and fixation during standardized production and installation processes, and their simple and direct design facilitates subsequent inspection and maintenance.

[0051] In some embodiments, multiple heat dissipation fins 2 are provided, and the multiple heat dissipation fins 2 are arranged at intervals along the axial direction of the housing 1. In these embodiments, for linear motors 100 that are long or have high power, the heat dissipation fins 2 may not be able to meet the heat dissipation requirements of the entire housing 1. However, the multiple heat dissipation fins 2 arranged at intervals along the axial direction can flexibly adjust their spacing and number according to actual needs to adapt to different power levels and heat dissipation requirements. By arranging multiple heat dissipation fins 2 at intervals along the axial direction, heat can be distributed more evenly within the axial range of the housing 1, ensuring that heat is effectively dissipated from different parts of the linear motor 100, which helps to improve the overall heat dissipation efficiency, prevents heat from concentrating in certain areas, thereby reducing the risk of local overheating and further improving heat exchange efficiency.

[0052] In some embodiments, see Figure 3 The heat dissipation fins 2 have two surfaces 21 arranged opposite each other along the axial direction of the housing 1, and at least one surface 21 of the heat dissipation fins 2 forms an angle with the radial cross-section of the housing 1. In these embodiments, the angle between one or both surfaces 21 of the heat dissipation fins 2 and the radial cross-section of the housing 1 makes one or both surfaces 21 of the heat dissipation fins 2 not completely perpendicular to the axial direction, but rather inclined or angled. This inclined design can significantly increase the contact area between the airflow and the surface 21 of the heat dissipation fins 2, thereby improving the heat dissipation effect. At the same time, by making the surface 21 of the heat dissipation fins 2 form an angle with the radial cross-section of the housing 1, the complexity of the airflow path can be increased, better disrupting the airflow and promoting more efficient heat transfer. In addition, the inclined fin design not only improves the heat transfer efficiency, but also reduces the pressure drop during airflow, thereby reducing the energy consumption of the system. In summary, the angled design of the heat dissipation fins 2 is an effective heat dissipation optimization scheme, which can significantly improve heat dissipation efficiency by increasing the airflow contact area, optimizing airflow disturbance, and reducing pressure drop, thus better meeting the heat dissipation requirements. In some examples, the two surfaces 21 of the heat dissipation fins 2 are arranged in parallel, and both surfaces 21 form an angle with the radial cross-section of the housing 1. This ensures that the thickness of the heat dissipation fins 2 is uniform, guaranteeing even heat distribution across the entire fin and preventing localized overheating, thus improving overall heat dissipation efficiency. The uniform thickness of the fin structure is relatively simple, easy to manufacture and process, and helps reduce production costs. Furthermore, since both surfaces 21 form an angle with the radial cross-section of the housing 1, during the operation of the linear motor 100, a reciprocating airflow is typically formed around the housing 1. The surfaces 21, as the windward side, can better disrupt the passing airflow, increasing turbulence and thereby improving heat transfer efficiency.

[0053] In some embodiments, the included angle is between 15° and 45°. In these embodiments, setting the included angle between the surface 21 of the heat dissipation fin 2 and the radial plane to 15° to 45° allows the heat dissipation fin 2 to effectively increase the contact area with the airflow, while simultaneously enhancing the convective heat transfer effect through turbulence, thereby significantly improving heat dissipation efficiency. Furthermore, this angle design optimizes heat dissipation performance without significantly increasing airflow resistance. If the included angle is too small (e.g., less than 15°, nearly perpendicular to the airflow), the increase in the contact area between the heat dissipation fin 2 and the airflow is limited, the improvement in convective heat transfer is not significant, and the optimization effect of heat dissipation performance will be greatly reduced. Conversely, if the included angle is too large (e.g., close to 85°), although airflow resistance will decrease, the airflow path becomes too straight, failing to effectively turbulent the airflow, resulting in reduced heat transfer efficiency. Therefore, selecting an included angle range of 15° to 45° not only effectively increases the contact area between the airflow and the fin surface 21 but also enhances heat transfer efficiency through appropriate turbulence effects, thereby achieving a highly efficient heat dissipation effect. Specifically, the included angle can be 15°, 20°, 25°, 30°, 35°, 40°, etc.

[0054] This application does not specify the manufacturing method of the housing 1 and the heat sink fins 2. For example, the housing 1 and the heat sink fins 2 can be manufactured independently and then fixed together by welding, snap-fitting, or other methods. This method provides high design flexibility and ease of maintenance, allowing the selection of optimal materials and manufacturing processes according to the needs of different components.

[0055] In some embodiments, the housing 1 and the heat dissipation fins 2 are integrally formed. In these embodiments, the integral forming design of the housing 1 and the heat dissipation fins 2 can significantly improve the overall integrity and stability of the structure, avoid reduced structural strength or increased thermal resistance due to connection points, and optimize heat conduction performance. Furthermore, integral forming can reduce processing steps and assembly errors, improve production efficiency, and ensure a tight fit between the heat dissipation fins 2 and the housing 1, resulting in a more aesthetically pleasing and compact structure. In some examples, the heat dissipation fins 2 and the housing 1 are manufactured integrally using 3D printing technology, enabling precise manufacturing of complex shapes while optimizing heat dissipation performance. In other examples, the heat dissipation fins 2 and the housing 1 are manufactured integrally using a die-forming process, suitable for mass production, ensuring a tight fit between the fins and the housing 1 while reducing production costs. In still other examples, the heat dissipation fins 2 and the housing 1 are integrally formed using casting or extrusion processes, ensuring a seamless connection between the fins and the housing 1, reducing thermal resistance, and improving structural strength. For example, aluminum alloy material can be used to manufacture the heat dissipation fins 2 and the housing 1 through an extrusion molding process.

[0056] In some embodiments, see Figure 2The linear motor 100 also includes a first magnetic field element 3, a second magnetic field element 4, and a central rod 5. One of the first magnetic field element 3 and the second magnetic field element 4 includes a winding 31, and the other includes a magnet 41. The central rod 5 is movably inserted into the housing 1. The first magnetic field element 3 is connected to the outer periphery of the central rod 5, and the second magnetic field element 4 is connected to the inner periphery of the housing 1. Figure 4 (To more clearly illustrate the relevant structure, Figure 4(The second magnetic field element 4 and heat dissipation fins 2 are not shown.) In the radial direction of the housing 1, the first magnetic field element 3 and the second magnetic field element 4 are spaced apart to form a first air zone 7. In the axial direction of the housing 1, the two ends of the first magnetic field element 3 are spaced apart from the housing 1 to form two second air zones 6. The two second air zones 6 are respectively used to communicate with the outside, and the first air zone 7 connects the two second air zones 6. In these embodiments, one of the first magnetic field element 3 and the second magnetic field element 4 includes a winding 31, and the other includes a magnet 41. This configuration enables the magnetic field interaction required for electromagnetic drive. The central rod 5 is movably inserted into the housing 1, and the first magnetic field element 3 is connected to the outer periphery of the central rod 5, while the second magnetic field element 4 is connected to the inner periphery of the housing 1. This allows for mutual movement between the central rod 5 and the housing 1. The first air zone 7 is used to accommodate the air gap between the magnetic field elements (first magnetic field element 3 and second magnetic field element 4), ensuring an appropriate gap between them to avoid friction and allow for effective transmission of the magnetic field. Along the axial direction of the housing 1, the two ends of the first magnetic field element 3 are also spaced apart from the housing 1, forming two second air zones 6. These two second air zones 6 are used to communicate with the outside, ensuring that cold air from the outside can enter the housing 1, helping to efficiently dissipate heat and reduce thermal resistance. The first air zone 7 connects the two second air zones 6, forming an airflow path inside the housing 1, which helps guide the cooling air to flow inside the linear motor 100, directly contacting the first magnetic field element 3 and the second magnetic field element 4 for heat exchange, thereby improving heat dissipation efficiency. Specifically, when the linear motor 100 is running, the first magnetic field element 3 and the second magnetic field element 4 move relative to each other along the axial direction, causing the first magnetic field element 3 and the housing 1 to move relative to each other along the axial direction, and the space of the two second air zones 6 located at both ends of the first magnetic field element 3 changes. The space of one second air zone 6 increases and the air pressure decreases, while the space of the other second air zone 6 decreases and the air pressure increases. The second air zone 6 with increased space will draw in cold air from the outside, while some gas in the second air zone 6 with decreased space will flow through the first air zone 7 to the second air zone 6 with increased space, while some gas will be discharged to the outside. In this way, air exchange between the inside and outside of the housing 1 is achieved. When the linear motor 100 changes its direction of motion, the space of the second air zone 6, which was previously enlarged, decreases, the air pressure increases, and gas is expelled; conversely, the space of the second air zone 6, which was previously reduced, increases, the air pressure decreases, and cool outside air is drawn in. Through this reciprocating motion, the air inside the linear motor 100 is constantly renewed, with cool air being drawn in and hot air being expelled, thus achieving a highly efficient heat dissipation effect. This design not only optimizes heat dissipation performance but also reduces the performance degradation of the linear motor 100 caused by temperature increases, improving the operating efficiency and reliability of the linear motor 100. Understandably, by using the airflow driven by the linear motor 100 itself, the dependence of the motor on additional cooling equipment (such as fans) can be reduced, thereby reducing system complexity and cost, while also reducing energy consumption.In some examples, the central rod 5 is connected to the housing 1 via a sliding bearing, enabling smoother and more reliable relative motion while reducing wear, lowering maintenance costs, and adapting to complex operating conditions. In some examples, the first magnetic field element 3 includes a winding 31 and an iron core 32. The iron core 32 has a yoke surrounding the central rod 5 and multiple teeth connected to the yoke. The winding 31 is wound around the teeth. The iron core 32 significantly enhances the magnetic field strength and uniformity of distribution, thereby improving the efficiency and performance of the linear motor 100.

[0057] In some embodiments, see Figures 4 to 8 ,or Figures 9 to 11 (To more clearly illustrate the relevant structure, Figure 9 (The second magnetic field element 4 and heat dissipation fins 2 are not shown.) The housing 1 has a vent 11 for connecting to the outside and at least one second air zone 6. In these embodiments, the vent 11 provides a direct channel for air exchange between the inside and outside of the housing 1. When the linear motor 100 is running, the relative movement between the first magnetic field element 3 and the second magnetic field element 4 causes a change in the volume of the second air zone 6. By providing the vent 11 on the housing 1, the air pressure in the second air zone 6 can be effectively balanced, ensuring smooth airflow into and out of the housing 1. When the volume of the second air zone 6 increases, cold air from the outside is drawn in through the vent 11; and when the volume of the second air zone 6 decreases, hot air inside is discharged to the outside through the vent 11. This design not only enhances heat dissipation but also reduces mechanical stress caused by air pressure changes, improving the stability and reliability of motor operation. In addition, the vent 11 can prevent vacuum or overpressure phenomena from occurring inside the housing 1 due to air pressure changes, thereby avoiding adverse effects on the structure and performance of the motor. In summary, the vent 11 on the housing 1 provides a highly efficient airflow management solution for the linear motor 100. Through its connection with the second air zone 6, it enables smooth air exchange between the inside and outside of the housing 1, thereby improving heat dissipation efficiency and enhancing the motor's operational stability. In some examples, the inner wall of the vent 11 has internal threads, which can be sealed using threaded fasteners (not shown in the figure). This allows for either connection or isolation between the second air zone 6 and the outside environment, depending on actual needs. For example, in high humidity or dusty environments, the vent 11 can be sealed to prevent contaminants from entering; while in situations with high heat dissipation requirements, the vent 11 can be opened to enhance heat dissipation.

[0058] In some embodiments, see Figures 4 to 8The vent 11 includes a first vent 111 and a second vent 112 spaced apart along the axial direction of the housing 1. The first vent 111 connects to the outside and a second air zone 6, and the second vent 112 connects to the outside and another second air zone 6. In these embodiments, when the linear motor 100 is running, the relative motion between the first magnetic field element 3 and the second magnetic field element 4 causes the volumes of the two second air zones 6 to change alternately. Specifically, when the volume of one second air zone 6 increases, cold air from the outside enters the air zone through the first vent 111 connected to it; at the same time, the volume of the other second air zone 6 decreases, and hot air inside is discharged through the second vent 112 connected to it. Subsequently, when the direction of motion of the linear motor 100 changes, the volume changes of the two air zones also reverse: the second air zone 6 that was originally increasing in volume begins to decrease, and the hot air inside is discharged through the first vent 111; while the second air zone 6 that was originally decreasing in volume begins to increase, and cold air from the outside enters through the second vent 112. Through this alternating change, the functions of the first vent 111 and the second vent 112 are also switched, realizing the intake of cold air and the exhaust of hot air, thereby forming a dynamic airflow exchange system, effectively promoting air exchange between the inside and outside of the housing 1, improving heat dissipation efficiency and maintaining the stability of the internal temperature of the linear motor 100.

[0059] In some embodiments, see Figures 4 to 8 Multiple first vents 111 are provided, arranged circumferentially along the housing 1; and / or multiple second vents 112 are provided, arranged circumferentially along the housing 1. In these embodiments, by increasing the number and distribution range of the vents 11, the heat dissipation efficiency and airflow management capability of the linear motor 100 can be significantly improved. Specifically, the multiple vents 11 (first vents 111 and / or second vents 112) arranged circumferentially along the housing 1 can achieve a more uniform airflow distribution, ensuring that cold air can enter the housing 1 from multiple directions, while hot air can also be discharged from multiple directions. This design with multiple vents 11 not only improves heat dissipation efficiency but also reduces the problem of uneven heat dissipation caused by local airflow obstruction, enabling more efficient heat dissipation and airflow management.

[0060] In some embodiments, see Figures 9 to 11The central rod 5 has a first end (upper end in the figure) extending out of the housing 1. The central rod 5 also has a first inner cavity 51 and a first ventilation hole 52 at the first end. The first ventilation hole 52 connects to the first inner cavity 51, which in turn connects to a second air zone 6. A vent 11 connects the central rod to the outside and another second air zone 6. In these embodiments, one second air zone 6 connects to the outside through the vent 11 on the housing 1, while the other second air zone 6 connects to the outside through the first ventilation hole 52 on the central rod 5. This reduces the number of vents 11 on the housing 1, simplifying its structure and effectively ensuring its overall strength. Air enters and exits the housing 1 through the vent 11 and the first ventilation hole 52, flowing through the first inner cavity 51 of the central rod 5. This allows for direct contact cooling of the central rod 5 and also cools the interior of the first magnetic field element 3 connected to the outside of the central rod 5, thus achieving better cooling of the first magnetic field unit. Specifically, when the linear motor 100 is running, the space of the second air zone 6 connected to the outside through the vent 11 of the housing 1 increases and the pressure decreases, drawing in cold air from the outside. Conversely, the space of another second air zone 6 decreases and the pressure increases, with some gas flowing to the second air zone 6 connected to the outside through the vent 11 of the housing 1, and some gas being discharged through the first inner cavity 51 and the first ventilation hole 52. When the direction of motion of the linear motor 100 changes, the space of the second air zone 6 connected to the first ventilation hole 52 increases and the pressure decreases, drawing in cold air from the outside. The space of the second air zone 6 connected to the outside through the vent 11 of the housing 1 decreases and the pressure increases, expelling the gas. This process repeats. By utilizing the internal structure of the central rod 5 to achieve the ventilation function, the number of holes in the housing 1 is reduced, ensuring the strength of the housing 1, while also expanding the cooling range and optimizing the airflow path, thereby improving the heat dissipation efficiency and overall performance of the linear motor 100.

[0061] In some embodiments, see Figures 9 to 11The center rod 5 also has a second end (lower end in the figure) located inside the housing 1. The second end has a first opening 53 communicating with the first inner cavity 51. The linear motor 100 also includes a guide rod 8. The guide rod 8 is coaxially arranged with the center rod 5. The guide rod 8 has a second inner cavity 81. One end of the guide rod 8 (upper end in the figure) passes through the first opening 53 into the first inner cavity 51 and has a second opening 83 communicating with the first inner cavity 51 and the second inner cavity 81. The other end of the guide rod 8 (lower end in the figure) is connected to the inner side of the housing 1 and has a second ventilation hole 82 communicating with the second inner cavity 81 and a second air zone 6. In these embodiments, by being coaxially arranged with the central rod 5, one end of the guide rod 8 passes through the first opening 53 into the first inner cavity 51 of the central rod 5, achieving coaxial sleeve between the central rod 5 and the guide rod 8. This ensures that the central rod 5 maintains precise guidance during movement, guaranteeing a large coaxiality between the first magnetic field element 3 connected to the central rod 5 and the second magnetic field element 4 connected to the guide rod 8 through the housing 1. The second inner cavity 81 of the guide rod 8 communicates with the first inner cavity 51 of the central rod 5 through the second opening 83. The second inner cavity 81 of the guide rod 8 also communicates with a second air zone 6 through a second ventilation hole 82, thereby achieving communication between the first inner cavity 51 and a second air zone 6, ultimately connecting the second air zone 6 to the outside environment. This optimizes the airflow path, allowing cold air to cool the guide rod 8, the central rod 5, and the first magnetic field element 3 more directly, expanding the cooling range and improving heat dissipation efficiency. In some examples, the guide rod 8 and the central rod 5 are connected by a sliding bearing, enabling smoother and more reliable relative movement, while reducing wear, lowering maintenance costs, and adapting to complex working environments.

[0062] In some embodiments, see Figure 9 The guide rod 8 includes a rod body 84 and a connecting seat 85 connected to one end of the rod body 84. The connecting seat 85 is connected to the inner side of the housing 1. A second inner cavity 81 is provided in the rod body 84, and a second ventilation hole 82 is provided in the connecting seat 85. In these embodiments, the guide rod 8 consists of a rod body 84 and a connecting seat 85. The connecting seat 85 is fixed to the inner side of the housing 1. Compared with a simple rod structure, this design can better withstand high loads and impact loads, significantly enhancing the connection stability between the guide rod 8 and the housing 1, thereby improving the reliability of the linear motor 100. The second ventilation hole 82 is provided on the connecting seat 85 instead of on the rod body 84, making the second ventilation hole 82 closer to the axial end of the housing 1. This design allows the airflow to cover a larger area within the second air zone 6, improving heat dissipation efficiency. In addition, by providing the second ventilation hole 82 on the connecting seat 85 instead of directly opening a hole in the housing 1, this design reduces the structural complexity of the housing 1, reduces the machining steps on the housing 1 and the potential risk of structural weakening, while facilitating subsequent maintenance and repair.

[0063] In some embodiments, the linear motor 100 further includes a first vent 9, which blocks the vent 11; and / or, the linear motor 100 further includes a second vent 10, which blocks the first ventilation hole 52. In these embodiments, by providing vents (first vent 9 and / or second vent 10) on the vent 11 and / or the first ventilation hole 52, dust, impurities, and possible liquids can be effectively prevented from entering the linear motor 100, thereby protecting critical components such as the winding 31 and magnet 41 inside the linear motor 100, reducing malfunctions caused by foreign objects, and improving the reliability and service life of the motor. The design of the vents allows free airflow while preventing moisture and dust from entering the linear motor 100. This design not only optimizes heat dissipation efficiency but also reduces uneven heat dissipation caused by blocked ventilation holes. Furthermore, the use of vents reduces the accumulation of dust and impurities, lowering the frequency of cleaning and maintenance inside the linear motor 100, thereby reducing maintenance costs. In some cases, the breathable components are made of breathable membrane materials, which have a microporous structure that allows air to pass through while preventing moisture and dust from entering.

[0064] Understandable, see Figure 1 and Figure 2 The linear motor 100 may also include a mounting arm 12 connected to the outside of the housing 1. The mounting arm 12 is used to connect the housing 1 to a first external structure (not shown in the figure). The end of the central rod 5 extending out of the housing 1 is provided with an external thread, which can be threadedly connected to a second external structure (not shown in the figure), thereby enabling the linear motor 100 to be better integrated into external devices. In some examples, a tray 13 is also connected to the outside of the housing 1 of the linear motor 100, providing a mounting surface for a spring (not shown in the figure) disposed between the linear motor 100 and the second external structure, facilitating the installation and fixation of the spring, which can provide cushioning for the housing 1.

[0065] According to a second aspect of this application, a suspension assembly (not shown in the figure) is provided, including a linear motor 100. The structure of the linear motor 100 is as described above. Since this suspension assembly adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0066] According to a third aspect of this application, a vehicle (not shown in the figure) is provided, including a linear motor 100 or a suspension assembly. The structure of the linear motor 100 or the suspension assembly is as described above. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0067] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0068] In the description of this application, 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. Therefore, a feature defined as "first" or "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.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0070] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0071] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A linear motor, characterized in that, include: chassis; as well as, Heat dissipation fins are provided on the outside of the housing for heat dissipation.

2. The linear motor according to claim 1, characterized in that, The heat dissipation fins extend circumferentially along the housing.

3. The linear motor according to claim 2, characterized in that, The heat dissipation fins are arranged around the housing along its circumference.

4. The linear motor according to claim 2, characterized in that, The heat dissipation fins are provided in multiple portions, and the multiple heat dissipation fins are arranged at intervals along the axial direction of the housing.

5. The linear motor according to claim 2, characterized in that, The heat dissipation fins have two surfaces that are arranged opposite each other in the axial direction of the housing, and at least one surface of the heat dissipation fins has an angle with the radial cross section of the housing.

6. The linear motor according to claim 5, characterized in that, The included angle is between 15° and 45°.

7. The linear motor according to claim 1, characterized in that, The casing and the heat dissipation fins are integrally formed.

8. The linear motor according to any one of claims 1 to 7, characterized in that, The linear motor further includes a first magnetic field element, a second magnetic field element, and a central rod. One of the first magnetic field element and the second magnetic field element includes a winding, and the other includes a magnet. The central rod is movably inserted into the housing. The first magnetic field element is connected to the outer periphery of the central rod, and the second magnetic field element is connected to the inner periphery of the housing. The first magnetic field element and the second magnetic field element are spaced apart in the radial direction of the housing to form a first air zone. Along the axial direction of the housing, the two ends of the first magnetic field element are respectively spaced apart from the housing to form two second gas domains. The two second gas domains are respectively used to communicate with the outside world, and the first gas domain is connected to the two second gas domains.

9. The linear motor according to claim 8, characterized in that, The casing has a vent hole for connecting to the outside and at least one of the second air zones.

10. The linear motor according to claim 9, characterized in that, The vent includes a first vent and a second vent, which are spaced apart along the axial direction of the housing. The first vent is used to connect to the outside and a second air zone, and the second vent is used to connect to the outside and another second air zone.

11. The linear motor according to claim 10, characterized in that, The first vent is provided in multiple manner, and the multiple first vents are arranged circumferentially along the housing; and / or, The second vent is provided in multiple ways, and the multiple second vents are arranged circumferentially along the housing.

12. The linear motor according to claim 9, characterized in that, The central rod has a first end extending out of the housing. The central rod also has a first inner cavity and a first ventilation hole opened at the first end. The first ventilation hole communicates with the first inner cavity. The first inner cavity also communicates with a second air zone. The ventilation hole is used to communicate with the outside and another second air zone.

13. The linear motor according to claim 12, characterized in that, The central rod also has a second end located inside the housing, and the second end has a first opening communicating with the first inner cavity; The linear motor also includes a guide rod, which is coaxially arranged with the center rod. The guide rod has a second inner cavity. One end of the guide rod passes through the first opening into the first inner cavity and has a second opening that connects the first inner cavity and the second inner cavity. The other end of the guide rod is connected to the inner side of the housing and has a second ventilation hole that connects the second inner cavity and a second air zone.

14. The linear motor according to claim 13, characterized in that, The guide rod includes a rod body and a connecting seat connected to one end of the rod body. The connecting seat is connected to the inner side of the housing. The second inner cavity is located in the rod body, and the second ventilation hole is located in the connecting seat.

15. The linear motor according to claim 12, characterized in that, The linear motor further includes a first venting element, which blocks the vent hole; and / or The linear motor also includes a second ventilator, which is configured to block the first ventilation hole.

16. A suspension assembly, characterized in that, Includes the linear motor as described in any one of claims 1 to 15.

17. A vehicle, characterized in that, Includes the linear motor as described in any one of claims 1 to 15 or the suspension assembly as described in claim 16.

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