Linear motor, electromagnetic suspension and vehicle

Abstract

The invention discloses a linear motor, an electromagnetic suspension and a vehicle. The linear motor comprises a primary assembly, a secondary assembly and a separator. The primary assembly is provided with an accommodating cavity; the secondary assembly is provided with a guide rod arranged in the axial direction. The partition piece is arranged in the containing cavity and divides the containing cavity into a first cavity body and a second cavity body, and the guide rod extends into the second cavity body; the separator comprises a first plate, a cylindrical side wall and a second plate, the first plate and the second plate are arranged at an interval in the axial direction, the first plate is arranged far away from the guide rod, and the cylindrical side wall is connected with the first plate and the second plate.

Description

Technical Field

[0001] The present application relates to the technical field of drive equipment, and more specifically, to a linear motor, an electromagnetic suspension and a vehicle. Background Art

[0002] A linear motor is a motor that converts electrical energy directly into mechanical energy of linear motion without any intermediate conversion device. It can save the intermediate conversion mechanism, reduce the space occupied by the equipment, and improve the system efficiency. As a structural form of linear motor, cylindrical linear motors are more advantageous; for example, cylindrical linear motors have high operating efficiency, high power and force density, and good servo performance.

[0003] In the prior art, when linear motors are running for a long time or bearing a large load, problems such as heat concentration and increased wear are prone to occur, which affect the service life and performance of the motor. In addition, in high-precision applications such as electromagnetic suspension, higher requirements are placed on the stability and response speed of the motor. However, setting up a heat dissipation structure in a linear motor requires a large space, and the assembly environment has strict requirements on the space occupied by the linear motor. Therefore, it is particularly important to develop a linear motor with a reasonable structure, excellent heat dissipation performance, and stable operation. Summary of the invention

[0004] One object of the present application is to provide a new technical solution for a linear motor, an electromagnetic suspension and a vehicle.

[0005] According to a first aspect of the present application, a linear motor is provided, the linear motor comprising:

[0006] A primary assembly, the primary assembly comprising a receiving chamber;

[0007] A secondary assembly, the secondary assembly comprising a guide rod arranged in an axial direction;

[0008] A separator, which is arranged in the aforementioned accommodating cavity, and the separator divides the accommodating cavity into a first cavity and a second cavity, and the aforementioned guide rod extends into the second cavity;

[0009] The partition comprises a first plate, a cylindrical side wall and a second plate. The first plate and the second plate are spaced apart in the axial direction and the first plate is far away from the guide rod. The cylindrical side wall connects the first plate and the second plate.

[0010] After the partition separates the accommodating cavity into a first cavity and a second cavity, the first cavity can be used as a cavity for the flow of cooling medium, and the second cavity is a moving space reserved for the guide rod. However, if the partition is set as a flat plate, the first cavity and the second cavity require a certain space, resulting in a larger space in the axial direction for the entire accommodating cavity. The present invention applies to set the partition as a first plate, a cylindrical side wall and a second plate, and the first plate and the second plate are spaced apart in the axial direction and the first plate is away from the guide rod, so that the first cavity and the second cavity are crossed in the axial direction, thereby ensuring the full utilization of the space of the intersection part, and on the basis of ensuring the space requirements of the first cavity and the second cavity, the space occupied by the entire linear motor assembly is reduced.

[0011] Optionally, the secondary component is sleeved on the outside of the primary component, the primary component and the secondary component can move relative to each other in the axial direction, and the guide rod can move axially in the second cavity; there is a first state in the process of relative movement of the primary component and the secondary component, and when in the first state, the guide rod is arranged in the cavity surrounded by the cylindrical side wall.

[0012] Optionally, a second plate is connected to the primary assembly to retain the partition within the receiving cavity.

[0013] Optionally, the plane where the first plate is located is perpendicular to the axis of the primary component; and / or the plane where the second plate is located is perpendicular to the axis of the primary component; and / or the axis of the cylindrical side wall coincides with the axis of the primary component.

[0014] Optionally, the outer diameter of the first plate is smaller than the outer diameter of the second plate.

[0015] Optionally, the first plate is disc-shaped, and a diameter of the first plate is greater than 1 / 2 of an inner diameter of the accommodating cavity.

[0016] Optionally, the primary component also includes:

[0017] a liquid inlet pipe, wherein the liquid inlet pipe is provided with a liquid supply port; and / or,

[0018] A liquid outlet pipe is provided with a liquid discharge port.

[0019] Optionally, the liquid inlet pipe and the accommodating chamber are coaxially arranged, and the outer diameter of the liquid inlet pipe is smaller than the inner diameter of the accommodating chamber;

[0020] The liquid outlet pipe is arranged on the side of the liquid inlet pipe in the radial direction.

[0021] Optionally, along the axial direction of the primary assembly, a length D of the liquid outlet pipe in the first cavity is less than 10 mm.

[0022] Optionally, a minimum distance A between the liquid supply port and the partition along the axial direction of the core is in a range of 5-10 mm.

[0023] Optionally, along the axial direction of the primary component, the cylindrical side wall has a first length, and the liquid inlet pipe has a second length in the first cavity; the first length is smaller than the second length.

[0024] Optionally, the primary component further comprises an end cover and an opening portion which are arranged opposite to each other along its axial direction, and the partition is arranged close to the end cover; the end cover is provided with a guide hole which is connected to the accommodating cavity and is coaxial with the accommodating cavity, and the guide hole is used for the guide rod to extend into the second cavity.

[0025] According to a second aspect of the present application, an electromagnetic suspension is provided, wherein the electromagnetic suspension comprises the linear motor as described in the first aspect.

[0026] According to a third aspect of the present application, a vehicle is provided, the vehicle comprising the electromagnetic suspension as described in the second aspect.

[0027] The technical solution adopted in this application can achieve the following beneficial effects:

[0028] In the linear motor provided in the embodiment of the present application, the coolant is fed into the interior of the primary component, and the primary component is cooled by cooling the coolant; specifically, the partition divides the accommodating cavity of the primary component into a first cavity for liquid cooling and a second cavity for moving the guide rod. The present invention application sets the partition as a first plate, a cylindrical side wall and a second plate, and the first plate and the second plate are spaced apart in the axial direction and the first plate is set away from the guide rod, so that the first cavity and the second cavity are crossed in the axial direction, thereby ensuring full utilization of the space of the crossing part, and reducing the space occupied by the entire linear motor assembly on the basis of ensuring the space requirements of the first cavity and the second cavity.

[0029] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0031] Figure 1 This is a schematic diagram of the structure of the primary component according to an embodiment of the present application. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the structure of the primary component according to an embodiment of the present application. Figure 2 ;

[0033] Figure 3 It is a schematic diagram of the structure of a linear motor according to an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Primary assembly; 10. Primary mandrel; 100. Accommodating chamber; 1001. First chamber; 1002. Second chamber; 13. Partitioning member; 131. First plate; 132. Cylindrical side wall; 133. Second plate; 16. Liquid inlet pipe; 161. Liquid supply port; 162. First liquid inlet; 17. Liquid outlet pipe; 171. Liquid discharge port; 172. Second liquid inlet;

[0036] 2. Secondary components; 21. Shell; 22. Magnet; 3. Sensor; 31. Sensor reader; 32. Magnetic grid strips; 4. Guide rod. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0038] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0039] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0040] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0041] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] In the related art, both oil cooling and water cooling are used for linear motors. When water cooling is used, it is necessary to pay attention to the problem that the water cooling chamber needs to occupy a large space and the guide rod movement requires a large space, resulting in the linear motor occupying a large space as a whole.

[0043] like Figure 1-Figure 2As shown, according to one embodiment of the present application, a linear motor is provided. The linear motor includes a primary assembly 1, the primary assembly 1 has a housing chamber 100, and further includes a partition 13, a liquid supply port 161, and a liquid discharge port 172. The partition 13 is arranged in the housing chamber 100, and the partition 13 divides the housing chamber 100 along its axial direction to form a first cavity 1001 and a second cavity 1002, wherein the first cavity 1001 is arranged close to the opening of the housing chamber 100, and the second cavity 1002 is arranged away from the opening of the housing chamber 100.

[0044] The drain port 172 is connected to the first cavity 1001 and is arranged away from the partition 13 ; the coolant enters the first cavity 1001 through the liquid supply port 161 arranged close to the partition 13 and is discharged from the accommodating cavity 100 through the drain port 172 .

[0045] The second cavity 1002 is used to provide a space for the guide rod to move.

[0046] In the linear motor provided in the embodiment of the present application, the partition 13 divides the accommodating cavity 100 into a first cavity 1001 for cooling and a second cavity 1002 for providing a moving space for the guide rod 4. In order to fully ensure the cooling effect, the first cavity 1001 has a minimum space requirement. At the same time, in order to ensure the stroke of the linear motor, the second cavity 1002 also has a minimum space requirement. Due to space limitations, the radial dimension of the linear motor is often limited to a fixed value. In order to meet the space dimension, the axial dimension of the linear motor can only be adjusted, but the harsh assembly environment also has large requirements on the axial dimension.

[0047] In the linear motor provided in the embodiment, the partition 13 includes a first plate 131 , a cylindrical side wall 132 and a second plate 133 . The first plate 131 and the second plate 133 are spaced apart in the axial direction, and the cylindrical side wall 132 connects the first plate 131 and the second plate 132 .

[0048] Specifically, a cylindrical side wall 132 is arranged around the first plate 131, the cylindrical side wall 132 extends along the axial direction of the accommodating cavity 100, one end of the cylindrical side wall 132 close to the liquid supply port 161 is connected to the first plate 131, and the cylindrical side wall 132 and the first plate 131 form part of the second cavity 1002; and

[0049] A second plate 133 is arranged around the cylindrical side wall 132, and one side of the second plate 133 is connected to an end of the cylindrical side wall 132 away from the liquid supply port 161, and the other side is connected to the iron core; the connection can be a direct connection or an indirect connection.

[0050] Under this arrangement, the first plate 131 and the cylindrical side wall 132 enclose a space for the guide rod 4 to move, and the cylindrical side wall 132 and the second plate 133 enclose a cooling space, thereby realizing the intersection of part of the axial space between the first cavity 1001 and the second cavity 1002. While ensuring the cooling space requirements of the first cavity 1001 and the guide rod movement space requirements of the second cavity 1002, the overall axial size of the linear motor is reduced to meet strict installation space requirements.

[0051] In the embodiment of the present application, the secondary component 2 is sleeved on the outside of the primary component 1, and the primary component 1 and the secondary component 2 can perform relative motion, and the relative motion is a translational motion along the axial direction of the primary core shaft 10. For example, the primary component 1 is a stator, that is, the primary component 1 is fixed; and the secondary component 2 is a mover, that is, the secondary component 2 performs translational motion relative to the primary component 1. When the primary component 1 and the secondary component 2 perform relative motion, the guide rod 4 will also move in the second cavity 1002.

[0052] During the relative movement of the primary component 1 and the secondary component 2, there is a first state. In the first state, the guide rod 4 is arranged in the cavity surrounded by the cylindrical side wall 132, that is, the partition 13 can avoid the guide rod 4. In the first state, the end of the guide rod 4 extends into the cavity surrounded by the above-mentioned cylindrical side wall 132 to ensure that avoidance space can be provided for the movement of the guide rod 4.

[0053] Furthermore, the cylindrical side wall 132 extends axially along the accommodating cavity 100, and the end of the cylindrical side wall 132 close to the liquid supply port 161 is connected to the first plate 131, and the cylindrical side wall 132 and the first plate 131 form part of the second cavity 1002; one side of the second plate 133 is connected to the end of the cylindrical side wall 132 away from the liquid supply port 161, and the other side is connected to the iron core of the primary component 1.

[0054] like Figure 3 As shown, according to the embodiment of the present application, the plane where the first plate 131 is located is perpendicular to the axis of the primary component 1; and / or the plane where the second plate 133 is located is perpendicular to the axis of the primary component 1; and / or the axis of the cylindrical side wall 132 coincides with the axis of the primary component 1. The plane where the first plate 131 is located is arranged perpendicular to the axis of the primary component 1, ensuring that the cooling effect will not be affected by the tilt when the cooling medium flows in the first cavity 1001; similarly, the plane where the second plate 133 is located is arranged perpendicular to the primary component 1, ensuring that the cooling medium in the first cavity 1001 near the second plate 133 flows smoothly, and the cooling effect will not be affected by the tilt; the axis of the cylindrical side wall 132 coincides with the axis of the primary component 1, ensuring that the overall operation of the linear motor will not be affected by the axis offset and the stable operation and life of the linear motor.

[0055] Furthermore, the outer diameter of the first plate 131 is smaller than the outer diameter of the second plate 133 , so as to ensure that the cooling medium can flow into the area close to the third plate 133 in the first cavity 1001 , so as to ensure normal cooling of this area.

[0056] Further, the cylindrical side wall 132 is a cylindrical structure coaxially arranged with the accommodating cavity 100. The first plate 131 is disc-shaped, and the diameter of the first plate 131 is greater than 1 / 2 of the inner diameter of the accommodating cavity 100.

[0057] In the linear motor provided in the embodiment of the present application, the liquid inlet pipe 16 for conveying the coolant is at least partially arranged in the hollow structure of the primary core shaft 10, and the coolant plays a cooling role inside the primary core shaft 10, so that a better cooling and heat dissipation effect can be achieved; and, the liquid inlet pipe 16 is at least partially arranged in the hollow structure of the primary core shaft 10, which can save space outside the primary core shaft 10, thereby facilitating the miniaturization design of the linear motor used in the primary component.

[0058] like Figure 1 As shown, in one embodiment, the core comprises:

[0059] A plurality of core bodies, wherein the plurality of core bodies are stacked and arranged along the axial direction of the core, each of the core bodies is provided with at least one annular receiving groove, and a coil is provided in the receiving groove; and

[0060] The primary core shaft 10 is coaxial with the core body and fixedly connected thereto. The primary core shaft 10 is a hollow shaft, and the central hole of the primary core shaft 10 forms the accommodating cavity 100 .

[0061] In this specific example, when cooling water is used as the cooling medium, the cooling water and the coil need to be separated. The setting of the primary mandrel 10 can completely isolate the cooling water and the coil, thereby improving the safety of the linear motor. In addition, the coolant is sent into the hollow structure of the primary mandrel 10, and the coolant plays a cooling role inside the primary mandrel 10, so that a better cooling and heat dissipation effect can be achieved.

[0062] like Figure 3 As shown, in one embodiment, the primary assembly further includes a liquid inlet pipe 16 and / or a liquid outlet pipe 17, the liquid supply port 161 is formed in the liquid inlet pipe 16; the liquid discharge port 172 is formed in the liquid outlet pipe 17;

[0063] The liquid supply port 161 and the liquid discharge port 172 are both disposed in the accommodating chamber 100 . In addition, the liquid inlet pipe 16 has a liquid inlet 162 , and the liquid inlet 162 is disposed outside the accommodating chamber 100 .

[0064] In this specific example, the inlet pipe 16 and the outlet pipe 17 for conveying the coolant are at least partially arranged in the hollow structure of the primary mandrel 10, which can save space outside the primary mandrel 10, thereby facilitating the miniaturization design of the linear motor used in the primary component.

[0065] like Figure 1 As shown, in one embodiment, the liquid inlet pipe 16 and the accommodating chamber 100 are coaxially arranged, and the outer diameter of the liquid inlet pipe 16 is smaller than the inner diameter of the accommodating chamber 100;

[0066] The liquid outlet pipe 17 is disposed on a side surface of the liquid inlet pipe 16 in a radial direction.

[0067] In this specific example, the liquid outlet pipe 17 is arranged on the side of the liquid inlet pipe 16 in the radial direction, so that the coolant can not only flow along the axial direction of the liquid inlet pipe 16 for cooling, but also in the process of the coolant flowing out from the liquid supply port 161 of the liquid inlet pipe 16 and flowing to the liquid discharge port 172 of the liquid outlet pipe 17, the coolant will also flow in the radial direction of the liquid inlet pipe 16, thereby achieving a more sufficient cooling and heat dissipation effect.

[0068] like Figure 1 As shown, in one embodiment, at least two liquid outlet pipes 17 are provided, and at least two liquid outlet pipes 17 are evenly distributed along the circumference of the liquid inlet pipe 16 .

[0069] In this specific example, the coolant flows out from the liquid supply port 161 of the liquid inlet pipe 16 and flows along the radial direction of the liquid inlet pipe 16 to the liquid outlet pipe 17 evenly distributed along the circumferential direction of the liquid inlet pipe 16, so that the cooling and heat dissipation effect of the coolant is not only more sufficient but also more uniform.

[0070] like Figure 1 As shown, in one embodiment, along the axial direction of the iron core, the length D of the liquid outlet pipe 17 in the first cavity 1001 is less than 10 mm.

[0071] In this specific example, it can be understood that the accommodating chamber 100 of the primary mandrel 10 has an opening, and a portion of the liquid inlet pipe 16 and a portion of the liquid outlet pipe 17 extend out of the accommodating chamber 100 through the opening of the accommodating chamber 100;

[0072] The length D of the liquid outlet pipe 17 arranged in the first cavity 1001 is set to be less than 10 mm, that is, in the first direction, the distance between the discharge port 172 and the opening of the accommodating cavity 100 is less than 10 mm; therefore, the cooling liquid will enter the liquid outlet pipe 17 through the discharge port 172 only when it is less than 10 mm away from the opening of the accommodating cavity 100, thereby ensuring that the cooling liquid will fully flow in the first cavity 1001 of the accommodating cavity 100 to exert a cooling effect before entering the liquid outlet pipe 17 and then leaving the first cavity 1001.

[0073] like Figure 1 As shown, in one embodiment, the minimum distance A between the liquid supply port 161 and the partition 13 along the axial direction of the core is in the range of 5-10 mm.

[0074] If the liquid supply port 161 is too close to the partition 13, the coolant will encounter obvious resistance when flowing from the liquid supply port 161 to the partition 13, so that the coolant may not flow smoothly; if the liquid supply port 161 is too far away from the partition 13, the coolant needs to travel a long distance after coming out of the liquid supply port 161 to reach the partition 13, so that the liquid inlet pipe 16 cannot provide a good cooling guide path for the coolant;

[0075] Therefore, in this specific example, the minimum distance A between the liquid supply port 161 and the partition 13 in the first direction is set to 5-10 mm, which ensures smooth flow of the coolant and provides a good cooling guide path for the coolant.

[0076] like Figure 1 As shown, in one embodiment, the primary mandrel 10 includes an end cover 101 and an opening 102 which are arranged opposite to each other along its axial direction, and the partition 13 is arranged close to the end cover 101;

[0077] The end cover 101 is provided with a guide hole 1010 which is in communication with and coaxial with the accommodating cavity 100 , and the guide hole 1010 is used for a guide rod of the linear motor to pass through;

[0078] The partition 13 further divides the accommodating cavity 100 along its axial direction to form a second cavity 1002 , and the second cavity 1002 is used to provide a space for the guide rod to move.

[0079] In this specific example, the guide rod of the linear motor passes through the end cover 101 and enters the second cavity 1002. The second cavity 1002 provides a portion of the travel for the movement of the guide rod, which is beneficial to the miniaturized design of the linear motor.

[0080] like Figure 1 As shown, in one embodiment, the primary assembly further includes a liquid inlet pipe 16, and the liquid supply port 161 is formed in the liquid inlet pipe 16;

[0081] Along the axial direction of the iron core, the cylindrical side wall 132 has a first length, and the liquid inlet pipe 16 has a second length in the first cavity 1001; the first length is smaller than the second length.

[0082] In this specific example, the length of the liquid inlet pipe 16 in the first cavity 1001 is set to be greater than the length of the partition 13 along the first direction, so that the space in the first cavity 1001 in the first direction is sufficient to arrange the liquid inlet pipe 16, thereby further ensuring that the liquid inlet pipe 16 provides a good cooling guide path for the coolant.

[0083] Furthermore, the space of the first cavity 1001 in the first direction is sufficient to arrange the liquid inlet pipe 16 , which is also beneficial to reducing the space occupied by the liquid inlet pipe 16 outside the primary core shaft 10 .

[0084] According to another embodiment of the present application, a linear motor is provided. The linear motor includes the primary component 1 as described above.

[0085] In one embodiment, the linear motor further comprises:

[0086] The secondary component 2 is sleeved on the outside of the primary component 1, and the secondary component 2 and the primary component 1 can move relative to each other along the axial direction of the iron core.

[0087] In the linear motor provided in the embodiment of the present application, a accommodating cavity for circulating coolant is provided on the iron core, so as to facilitate timely removal of the heat generated by the coil; and, a liquid supply port for the coolant to enter the first cavity in the accommodating cavity is arranged close to the partition, while a liquid discharge port for discharging the coolant from the accommodating cavity is arranged away from the partition, so that the dead water area in the accommodating cavity can be reduced as much as possible, the fluidity of the coolant can be improved, and it is beneficial to improve the heat dissipation effect.

[0088] like Figure 1 As shown, in one embodiment, the secondary component 2 includes a sleeve 21 and a magnetic steel 22 fixed to the inner wall of the sleeve 21; the sleeve 21 is coaxially arranged with the iron core, and the sleeve 21 is sleeved on the outer periphery of the iron core.

[0089] like Figure 1 As shown, in one embodiment, the linear motor also includes a guide rod 4, which is coaxially arranged with the accommodating cavity, one end of the guide rod 4 is connected to the end of the sleeve 21 away from the first cavity 1001, and the other end of the guide rod 4 is arranged in the second cavity 1002 and can move in the second cavity 1002.

[0090] In this specific example, a portion of the guide rod 4 extends into the second cavity 1002 and can move in the second cavity 1002, which is helpful to reduce the length of the linear motor in the axial direction.

[0091] like Figure 1 As shown, in one embodiment, the linear motor further comprises:

[0092] Sensor 3, the sensor 3 comprises:

[0093] A sensor reader 31, wherein the sensor reader 31 is connected to the iron core; and

[0094] The magnetic grating strip 32 is arranged on the guide rod 4, the sensor reading head 31 and the magnetic grating strip 32 move relative to each other, and the sensor reading head 31 and the magnetic grating strip 32 cooperate with each other to sense the position change between the two.

[0095] In this specific example, in order to detect the relative position relationship between the primary component 1 and the secondary component 2 during the translational motion, the linear motor is provided with a sensor 3 , and the sensor 3 has a sensor reading head 31 and a magnetic grating strip 32 .

[0096] Among them, the sensor reader 31 is connected to the primary core shaft 10 of the primary component 1. When the primary component 1 is a stator, the sensor reader 31 is fixed; and the magnetic grating strip 32 is connected to the secondary component 2. When the secondary component 2 is a mover, the magnetic grating strip 32 moves translationally with the secondary component 2.

[0097] Part of the structure of the liquid inlet pipe 16 and the part of the structure of the liquid outlet pipe 17 for conveying the coolant are arranged in the first cavity 1001, and part of the structure of the sensor 3 is arranged in the second cavity 1002; that is, the partition 13 separates the coolant and the sensor 3, thereby preventing the coolant from entering the sensor 3 and damaging the sensor; and the space of the entire accommodating cavity 100 is fully utilized.

[0098] In this specific example, a portion of the magnetic grating strip 32 follows the guide rod 4 and extends into the cylindrical side wall 132 of the partition 13, that is, the space inside the cylindrical side wall 132 provides a certain stroke for the translational movement of the magnetic grating strip 32 relative to the sensor reader 31 along the first direction, thereby saving the size of the linear motor along the first direction; making the overall structure of the linear motor more compact.

[0099] In addition, the space surrounding the outside of the cylindrical side wall 132 provides a flow path for the coolant; that is, after the coolant flows out from the liquid supply port 161 and reaches the first plate 131 of the partition 13, a portion of the coolant will continue to flow toward the second plate 133 of the partition 13. The space between the outside of the cylindrical side wall 132 and the inner wall of the primary core shaft 10 expands the flow path of the coolant, and the coolant further fully exerts its cooling effect between the outside of the cylindrical side wall 132 and the inner wall of the primary core shaft 10.

[0100] like Figure 3 As shown, in one embodiment, the liquid inlet pipe 16, the primary core shaft 10 and the cylindrical side wall 132 are all coaxially arranged.

[0101] In this specific example, the liquid inlet pipe 16, the primary core shaft 10 and the cylindrical side wall 132 of the partition 13 are all coaxially arranged, which is conducive to the coolant to fully and evenly cool and dissipate the heat of the linear motor.

[0102] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0103] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A linear motor, characterized in that: The linear motor comprises: A primary component (1), the primary component (1) comprising a receiving chamber (100); A secondary assembly (2), the secondary assembly (2) comprising a guide rod (4) arranged along the axial direction; a partition (13), the partition (13) being arranged in the accommodating cavity (100), the partition (13) dividing the accommodating cavity (100) into a first cavity (1001) and a second cavity (1002), the guide rod (4) extending into the second cavity (1002); The partition (13) comprises a first plate (131), a cylindrical side wall (132) and a second plate (133), wherein the first plate (131) and the second plate (133) are spaced apart from each other in the axial direction and the first plate (131) is arranged away from the guide rod, and the cylindrical side wall (132) connects the first plate (131) and the second plate (133).

2. The linear motor according to claim 1, characterized in that: The secondary component (2) is sleeved on the outside of the primary component (1), the primary component (1) and the secondary component (2) are capable of relative movement in the axial direction, and the guide rod (4) is capable of moving in the axial direction within the second cavity (1002); There is a first state in the process of relative movement between the primary component (1) and the secondary component (2). In the first state, the guide rod (4) is arranged in the cavity surrounded by the cylindrical side wall (132).

3. The linear motor according to claim 1, characterized in that: The second plate (133) is connected to the primary assembly (1) to hold the partition (13) in the accommodating chamber (100).

4. The linear motor according to claim 1, characterized in that: The plane in which the first plate (131) is located is perpendicular to the axis of the primary assembly (1); and / or The plane where the second plate (133) is located is perpendicular to the axis of the primary assembly (1); and / or The axis of the cylindrical side wall (132) coincides with the axis of the primary component (1).

5. The linear motor according to claim 1, characterized in that: The outer diameter of the first plate (131) is smaller than the outer diameter of the second plate (133).

6. The linear motor according to claim 1, characterized in that: The first plate (131) is disc-shaped, and the diameter of the first plate (131) is greater than 1 / 2 of the inner diameter of the accommodating cavity (100).

7. The linear motor according to claim 1, characterized in that: The primary component (1) further comprises: a liquid inlet pipe (16), wherein the liquid inlet pipe (16) is provided with a liquid supply port (161); and / or, A liquid outlet pipe (17), wherein the liquid outlet pipe (17) is provided with a liquid discharge port (172).

8. The linear motor according to claim 7, characterized in that: The liquid inlet pipe (16) and the accommodating chamber (100) are coaxially arranged, and the outer diameter of the liquid inlet pipe (16) is smaller than the inner diameter of the accommodating chamber (100); The liquid outlet pipe (17) is arranged on the side of the liquid inlet pipe (16) in the radial direction.

9. The linear motor according to claim 7, characterized in that: Along the axial direction of the primary component (1), the length D of the liquid outlet pipe (17) in the first cavity (1001) is less than 10 mm.

10. The linear motor according to claim 7, characterized in that: The minimum distance A between the liquid supply port (161) and the partition (13) along the axial direction of the iron core is in the range of 5-10 mm.

11. The linear motor according to claim 7, characterized in that: Along the axial direction of the primary component (1), the cylindrical side wall (132) has a first length, and the liquid inlet pipe (16) has a second length in the first cavity (1001); the first length is smaller than the second length.

12. The linear motor according to claim 1, characterized in that: The primary assembly (10) further comprises an end cover (101) and an opening (102) which are arranged opposite to each other along the axial direction thereof, and the partition (13) is arranged close to the end cover (101); The end cover (101) is provided with a guide hole (1010) which is in communication with and coaxial with the accommodating cavity (100), and the guide hole (1010) is used for the guide rod (4) to extend into the second cavity (1002).

13. An electromagnetic suspension, characterized in that: The electromagnetic suspension comprises a linear motor as claimed in any one of claims 1 to 12.

14. A vehicle, characterized in that: The vehicle includes the electromagnetic suspension as claimed in claim 13.

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