Linear motor and vehicle

Abstract

The application provides a linear motor and a vehicle. The linear motor comprises a stator and a mover, and the mover can move relative to the stator. The stator is provided with a first cooling flow channel, and the mover is provided with a second cooling flow channel. The first cooling flow channel is arranged in the stator, and the second cooling flow channel is arranged in the mover. The first cooling flow channel is used for filling a first cooling medium, and the second cooling flow channel is used for filling a second cooling medium. When the linear motor performs reciprocating motion, the first cooling medium and the second cooling medium can simultaneously cool the motor, and the heat dissipation performance of the motor can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power technology, and in particular to a linear motor and a vehicle. BACKGROUND

[0002] The motor generates waste heat when working, and the heat generation of a large thrust motor is particularly serious.

[0003] At present, the elements inside the motor are in a closed environment. When the motor is working, the elements inside the motor generate heat. The elements are in a closed environment and often cannot be effectively cooled, which can easily cause the motor to overheat and damage the internal elements of the motor. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide a linear motor and a vehicle that can improve the heat dissipation performance.

[0005] In a first aspect, the present application provides a linear motor, comprising:

[0006] a stator;

[0007] a mover capable of moving relative to the stator;

[0008] the stator is provided with a first cooling flow channel, and the mover is provided with a second cooling flow channel.

[0009] In combination with the first aspect, in a possible implementation manner, the first cooling flow channel and the second cooling flow channel are mutually isolated.

[0010] In combination with the first aspect, in a possible implementation manner, the stator further comprises a center rod, the center rod is provided with a coil, a projection of the first cooling flow channel in the radial direction of the center rod at least partially overlaps the coil, and a projection of the second cooling flow channel in the radial direction of the center rod at least partially overlaps the coil.

[0011] In combination with the first aspect, in a possible implementation manner, the stator further comprises a center rod, the center rod is provided with a coil, a projection of the first cooling flow channel in the radial direction of the center rod at least partially overlaps the first part of the coil, and a projection of the second cooling flow channel in the radial direction of the center rod at least partially overlaps the second part of the coil, at least part of the first part of the coil constitutes at least part of the second part of the coil.

[0012] In combination with the first aspect, in a possible implementation manner, the center rod is provided with the first cooling flow channel.

[0013] With reference to the first aspect, in a possible implementation manner, the motor is provided with a guide structure, the guide structure comprises a stator guide portion arranged on the stator and a rotor guide portion arranged on the rotor, at least part of the first cooling flow channel is arranged on the stator guide portion, and at least part of the second cooling flow channel is arranged on the rotor guide portion.

[0014] With reference to the first aspect, in a possible implementation manner, the stator guide portion comprises a first stator guide portion, the rotor guide portion comprises a first rotor guide portion, the stator further comprises a center rod, the center rod is provided with the first stator guide portion, and the first stator guide portion forms a cavity, the cavity is matched with the first rotor guide portion.

[0015] With reference to the first aspect, in a possible implementation manner, the rotor further comprises a shell, the shell is provided with a guide rod, and the guide rod is formed as the first rotor guide portion.

[0016] With reference to the first aspect, in a possible implementation manner, the stator guide portion further comprises a second stator guide portion, the rotor guide portion further comprises a second rotor guide portion, the shell is provided with a receiving cavity, at least part of the stator is arranged in the receiving cavity, the shell is provided with an opening, the center rod passes through the opening and matches with the opening, so that the opening forms the second rotor guide portion, and the center rod is formed as the second stator guide portion.

[0017] With reference to the first aspect, in a possible implementation manner, the second stator guide portion can extend out of the opening.

[0018] With reference to the first aspect, in a possible implementation manner, the shell is provided with a first end and a second end which are axially opposite to each other, the opening is formed in the first end, the first rotor guide portion is formed in the second end and extends from the second end to the first end.

[0019] With reference to the first aspect, in a possible implementation manner, the first cooling flow channel is arranged in the first stator guide portion and the second stator guide portion.

[0020] With reference to the first aspect, in a possible implementation manner, the second cooling flow channel is arranged in the first rotor guide portion.

[0021] With reference to the first aspect, in a possible implementation manner, the first cooling flow channel comprises a first liquid collecting ring, a second liquid collecting ring and a plurality of through holes, the first liquid collecting ring and the second liquid collecting ring are arranged in an axial direction of the center rod, and the plurality of through holes are distributed in a circumferential direction of the center rod, each of the through holes is in communication with the first liquid collecting ring and the second liquid collecting ring.

[0022] With reference to the first aspect, in a possible implementation manner, the second cooling flow channel extends along an axial direction of the mover guide portion.

[0023] With reference to the first aspect, in a possible implementation manner, a second cooling medium is filled in the second cooling flow channel, and a volume of the second cooling medium is less than a volume of the second cooling flow channel.

[0024] With reference to the first aspect, in a possible implementation manner, the mover further includes a shell, and a receiving cavity is arranged in the shell, and the coil is arranged in the receiving cavity.

[0025] With reference to the first aspect, in a possible implementation manner, the motor is provided with a first guide structure and a second guide structure, and the first guide structure and the second guide structure are arranged on the mover.

[0026] With reference to the first aspect, in a possible implementation manner, the motor further includes a heat dissipation assembly, and the heat dissipation assembly is in contact with a portion of the center rod that extends out of the shell.

[0027] With reference to the first aspect, in a possible implementation manner, the heat dissipation assembly includes a fan, a heat dissipation fin and a vapor chamber, the vapor chamber is in contact with a portion of the heat conduction member that extends out of the shell, the heat dissipation fin is connected to the vapor chamber, and the fan is configured to blow air to the heat dissipation fin.

[0028] In a second aspect, the present application provides a vehicle, and the vehicle includes the linear motor according to the first aspect.

[0029] In the present application, the first cooling flow channel is arranged in the stator, and the second cooling flow channel is arranged in the mover. The first cooling flow channel is filled with a first cooling medium, and the second cooling flow channel is filled with a second cooling medium. When the linear motor performs reciprocating motion, the first cooling medium and the second cooling medium can simultaneously cool the motor, and the heat dissipation performance of the motor can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments of the present application or the prior art will be described below.

[0031] Figure 1 FIG. 1 is a structural schematic diagram of a motor according to an embodiment of the present application;

[0032] Figure 2 FIG. 2 is a structural schematic diagram of a center rod according to an embodiment of the present application;

[0033] Figure 3 FIG. 3 is a sectional view of B-B in FIG. 1; Figure 2

[0034] ​Figure 4 A structural schematic diagram of a motor omitting a shell and a stator is provided for an embodiment of the present application.

[0035] Figure 5 A structural schematic diagram of a motor omitting a shell, a stator and an end cover is provided for an embodiment of the present application.

[0036] Figure 6 A structural schematic diagram of an end cover cooperating with a center rod is provided for an embodiment of the present application.

[0037] Explanation of reference signs:

[0038] 1000, motor; 100, shell; 110, accommodating cavity; 120, opening; 130, through port; 200, stator; 211, first stator guide part; 212, second stator guide part; 220, coil; 300, mover; 311, first mover guide part; 312, second mover guide part; 400, center rod; 410, first cooling flow channel; 411, first liquid collecting ring; 412, second liquid collecting ring; 413, through hole; 420, limiting groove; 430, sliding bearing; 500, heat dissipation assembly; 510, fan; 520, heat dissipation fin; 530, uniform temperature plate; 600, end cover; 610, body part; 620, guide rod; 621, second cooling flow channel; 630, heat dissipation part. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0040] The present application discloses a vehicle, which comprises a motor capable of providing power for the vehicle. The vehicle can be a fuel automobile, an electric automobile, an electric motorcycle, an electric moped, etc., and the type of the vehicle is not specifically limited in the present application.

[0041] Please refer to Figure 1The motor 1000 includes a stator 200 and a rotor 300, the housing 100 encloses a receiving cavity 110, the rotor 300 and the stator 200 are both arranged in the receiving cavity 110, the rotor 300 can generate a magnetic field, and the stator 200 can also generate a magnetic field. The stator 200 is composed of a magnetic material, when an electric current is applied through the stator 200, the magnetic material will be activated and generate a magnetic field. The magnetic field formed around the stator 200 is a static magnetic field. The rotor 300 contains a magnetic material, when an electric current is applied through the rotor 300, the magnetic material will respond to the electric current and form a magnetic field. This magnetic field can be relatively moving. When the magnetic field generated by the rotor 300 and the magnetic field generated by the stator 200 interact, an acting force acting on the rotor 300 is generated, which can make the rotor 300 move. When the magnetic field generated by the rotor 300 and the magnetic field generated by the stator 200 interact, the interaction of the magnetic fields will generate a Lorentz force. Its direction and size are affected by the relative position, strength and direction between the two magnetic fields. This Lorentz force will act on the rotor 300, prompting it to move, realizing the conversion of electric energy into mechanical energy.

[0042] In some embodiments, by controlling the change of the magnetic field of one of the rotor 300 or the stator 200, the size or direction of the acting force acting on the rotor 300 due to the change of the magnetic field can be controlled, and thus the movement of the rotor 300 can be controlled. The movement of the rotor 300 can be a rotational movement or a linear reciprocating movement. The current intensity, direction or mode in the energized coil can be changed to control the change of the magnetic field; adjusting the current intensity directly affects the strength of the magnetic field, changing the direction of the current can change the direction of the magnetic field, and controlling the current mode can affect the rate and mode of the change of the magnetic field.

[0043] When the magnetic field generated by the rotor 300 and the magnetic field generated by the stator 200 interact, waste heat will be generated. When running, the magnetic field interaction causes some energy to be converted into heat and lost, thereby generating waste heat. These energy losses can come from the change of the magnetic field, the resistance generated when the current passes through the coil, the conversion of magnetic energy into mechanical energy.

[0044] In the present application, the stator 200 and the mover 300 are both in the accommodation cavity 110, in order to facilitate the waste heat of the accommodation cavity 110 to dissipate, the shell 100 is provided with an opening 120, the opening 120 is communicated with the accommodation cavity 110. The stator includes a center rod 400, part of the center rod 400 extends into the shell 100, specifically, the center rod 400 is provided in the opening 120, part of the center rod 400 extends out of the accommodation cavity 110, part of the center rod 400 extends into the accommodation cavity 110, the part of the center rod 400 extending into the accommodation cavity 110 is connected with the stator 200, the center rod 400 can transmit the heat of the stator 200 and the accommodation cavity 110 to the outside of the accommodation cavity 110, so as to reduce the temperature of the stator 200 and the accommodation cavity 110. It should be noted that the temperature of the accommodation cavity 110 is reduced, and the temperature of the mover 300 in the accommodation cavity 110 is also reduced. The material of the center rod 400 can be copper, aluminum, high thermal conductivity alloy, so as to have good heat conduction performance, so as to efficiently conduct heat; have sufficient mechanical strength and stability, so as to support the structure of the stator and bear the pressure and vibration in operation; have good high temperature resistance, not easy to be deformed or damaged by high temperature.

[0045] In the embodiments provided in the present application, see Figures 2-3The central rod 400 has a first cooling flow channel 410, which includes a first collecting ring 411, a second collecting ring 412, and a plurality of through holes 413 each connecting the first collecting ring 411 and the second collecting ring 412. The first collecting ring 411 is located outside the shell 100, and the second collecting ring 412 is located inside the shell 100. It can be understood that the first collecting ring 411 is located outside the accommodating cavity 110, and the second collecting ring 412 is located inside the accommodating cavity 110. The second collecting ring 412 is provided with a heat-absorbing first cooling medium capable of gasification. The first cooling medium is at least one of water, ammonia water, diethyl ether, and formaldehyde. It should be noted that when the temperature inside the stator 200 or the accommodating cavity 110 is relatively high, the first cooling medium in the second collecting ring 412 can change from a liquid state to a gaseous state, and the first cooling medium absorbs heat from the stator 200 or the accommodating cavity 110 during the change from the liquid state to the gaseous state. The first cooling medium in the gaseous state moves to the first collecting ring 411. Since the first collecting ring 411 is located outside the accommodating cavity 110, the first cooling medium in the first collecting ring 411 is easily liquefied by cooling. It can be understood that the first cooling medium can transfer heat from the stator 200 or the accommodating cavity 110 to the outside of the accommodating cavity 110, thereby improving the heat conduction performance of the central rod 400 and accelerating the heat dissipation performance inside the stator 200 or the accommodating cavity 110. The gas working medium moving to the first collecting ring 411 is outside the accommodating cavity 110, and the first cooling medium in the first collecting ring 411 is liquefied by cooling and returns to the second collecting ring 412. In this way, the first cooling medium can be reused. In actual application of the motor 1000, the second collecting ring 412 is below the first collecting ring 411, and the first cooling medium in the second collecting ring 412 rises to the first collecting ring 411 after gasification, and the first cooling medium in the first collecting ring 411 liquefies and falls back to the second collecting ring 412. In this case, when the first cooling medium in the second collecting ring 412 is heated, its temperature rises and begins to absorb heat. When the temperature reaches a certain level, the liquid begins to change phase and changes from a liquid state to a gaseous state. This change requires a large amount of latent heat, which is heat absorbed or released without causing a temperature change during phase change. During the phase change of the liquid to the gas, the interaction between the molecules is overcome, and the molecules gradually separate and exist in the gaseous state, which requires a large amount of energy to absorb heat from the surroundings. Therefore, the process of changing the first cooling medium in the second collecting ring 412 from a liquid state to a gaseous state is essentially providing the energy required for phase change by absorbing heat from the high-temperature region of the stator 200 or the accommodating cavity 110. This phase change mechanism allows the cooling medium to absorb and carry away heat while changing state, thereby facilitating heat dissipation and temperature reduction.In contrast, during the phase change, the liquid to gas transition requires the absorption of a large amount of heat, while the liquefaction of gas releases the same amount of heat. This process of latent heat absorption and release absorbs heat when the liquid becomes gas, and releases heat when the gas becomes liquid again.

[0046] In the embodiments provided in the present application, please refer to Figure 3 The plurality of through holes 413 are distributed circumferentially along the center rod 400, and each through hole 413 communicates the first liquid collecting ring 411 and the second liquid collecting ring 412. The through hole 413 can guide the gaseous first cooling medium to rise from the second liquid collecting ring 412 to the first liquid collecting ring 411, and the through hole 413 can also guide the liquefied first cooling medium to fall from the first liquid collecting ring 411 to the second liquid collecting ring 412. The plurality of through holes 413 are distributed circumferentially along the center rod 400, which can make the stator 200 more uniform in heat dissipation. The plurality of through holes 413 are uniformly distributed circumferentially along the center rod 400, which further improves the uniformity of heat dissipation of the stator 200. The distribution in the circumferential direction can ensure that the liquid or gas flows more uniformly around the stator 200 during the heat dissipation process. This helps to eliminate heat concentration or dead angles and improve the overall heat dissipation efficiency. It can cover a wider area around the center rod 400, which can ensure that the heat dissipation liquid or gas can fully cover each part of the stator 200, thereby uniformly cooling the entire system. By being distributed in the circumferential direction, it can promote more extensive heat conduction. This distribution can ensure that the liquid and gaseous media flow and transfer heat uniformly throughout the heat dissipation system, making the heat dissipation process more efficient. It should be noted that when the motor 1000 is working, the gaseous process of the first cooling medium in the second liquid collecting ring 412 and the liquefaction process of the first cooling medium in the first liquid collecting ring 411 can occur at the same time, and the center rod 400 is provided with a plurality of through holes 413. Some of the through holes 413 can mainly guide the gaseous first cooling medium to rise to the first liquid collecting ring 411, and the other part of the through holes 413 can mainly guide the liquefied first cooling medium to fall to the second liquid collecting ring 412, which reduces the possibility of congestion of the through holes 413 and improves the efficiency of the first cooling medium in conducting heat through phase change.

[0047] Please refer to Figure 4The mover 300 includes a housing 100, within which a guide rod 620 is provided. The guide rod 620 has a sealed second cooling channel 621, which is isolated from the first cooling channel 410. The second cooling channel 621 contains a liquid second cooling medium, which is at least one of water, ammonia, ether, and formaldehyde. Generally, the volume of the second cooling medium is smaller than the volume of the second cooling channel 621, occupying 1 / 3 to 2 / 3 of the cavity's volume. When the second cooling medium occupies 1 / 3 to 2 / 3 of the cavity's volume, the efficiency of the cooling system can be improved, effectively absorbing heat and maximizing the cooling effect within a given space. When the second cooling medium occupies less than 1 / 3 of the cavity's volume, there is insufficient second cooling medium, which cannot effectively absorb and conduct the generated heat, reducing the efficiency of the cooling system. When the second cooling medium occupies more than 2 / 3 of the cavity's volume, the excess cooling medium leads to hydrodynamic instability within the cavity. This can cause turbulence in fluid flow, liquid oscillation, or irregular movement, affecting cooling efficiency. When the end cap 600 moves relative to the center rod 400, the guide rod 620 reciprocates relative to the center rod 400. The second cooling medium in the second cooling channel 621 can oscillate, and the second cooling medium will continuously splash onto the inner surface of the second cooling channel 621. As the second cooling medium splashed onto the inner surface of the second cooling channel 621 falls back, it continuously absorbs heat from the center rod 400, and finally conducts the heat to the outside of the receiving cavity 110 through the heat dissipation part 630 in the end cap 600. Based on the principle of heat conduction, heat will be conducted from a high-temperature area to a low-temperature area. The center rod 400 is a high-temperature area, while the second cooling medium is a low-temperature area, and heat is conducted through the heat absorption of the medium. When the guide rod 620 reciprocates, the liquid medium in the second cooling channel 621 is disturbed, causing the liquid to continuously splash onto the inner surface of the channel. The oscillation and splashing of the liquid cause frequent contact between the liquid and the inner surface of the flow channel, increasing the surface area for heat transfer and accelerating the heat absorption process. The second cooling medium, having absorbed heat, undergoes a liquid return process, transferring the absorbed heat to the outside of the receiving cavity 110 through the heat dissipation part 630 in the end cover 600. Utilizing the flow and contact surface characteristics of the liquid medium, combined with the principle of heat conduction, heat transfer and dissipation are achieved through the oscillation and heat absorption capacity of the fluid. During the oscillation process, the second cooling medium can effectively absorb heat conducted from the stator 200 to the center rod 400 and transfer the heat to the end cover 600, thereby reducing the temperature of the stator 200 inside the receiving cavity 110. Water has a good specific heat capacity and high thermal conductivity; using water as the second cooling medium can improve the heat dissipation performance of the motor 1000. The aforementioned oscillation can be periodic or non-periodic, regular or irregular back-and-forth vibration or oscillation.

[0048] In the embodiments provided in the present application, on one hand, the first cooling medium is arranged in the first cooling flow channel 410 of the center rod 400, and the first cooling medium can be vaporized when absorbing heat to transfer heat to the outside of the accommodation cavity 110. On the other hand, the guide rod 620 in the end cover 600 has a second cooling flow channel 621, and the second cooling flow channel 621 is arranged with a liquid second cooling medium. When the end cover 600 moves relative to the center rod 400, the second cooling medium can be shaken to absorb the heat transferred to the center rod 400 by the stator 200, so as to reduce the temperature of the stator 200 and the center rod 400, and further improve the heat dissipation performance inside the motor 1000.

[0049] In the embodiments provided in the present application, the vacuum degree of the first cooling flow channel 410 is between -99kpa and -89kpa. Taking water as the first cooling medium, when the temperature of the stator 200 reaches 30℃, the water can be boiled, and the boiled water in the second liquid collecting ring 412 can be vaporized to absorb the heat of the stator 200, so as to greatly improve the heat dissipation performance of the stator 200. By controlling the vacuum degree of the sealed space, the boiling point of the first cooling medium can be controlled. Boiling is the process of changing liquid into gas at a certain temperature. When the liquid reaches its boiling point, under a given pressure, part of the molecules inside the liquid will obtain enough energy to overcome the surface tension and change into gas. This process absorbs a large amount of heat, because at the same time when the liquid changes into gas, it needs to absorb heat to overcome the energy required for phase change. Controlling the boiling point of the liquid can be realized by controlling the pressure of the liquid. Generally, with the decrease of the pressure, the boiling point of the liquid also decreases; the increase of the pressure can increase the boiling point of the liquid. By adjusting the vacuum degree of the first cooling flow channel 410, the boiling point of the water can be reduced, so that the water starts to boil at a lower temperature, effectively improving the heat dissipation performance.

[0050] In the embodiments provided in the present application, please refer to Figures 5-6The stator 200 includes coils 220 wound around the central rod. Permanent magnets can be arranged in the housing. When the coils 220 are energized, the magnetic field generated by the coils 220 in the stator 200 interacts with the magnetic field generated by the permanent magnets in the mover 300 to generate an acting force that pushes the mover 300 to move. The coils in the stator 200 also generate waste heat when energized. The central rod 400 is in direct contact with the stator 200, which can accelerate the cooling of the stator 200 and improve the heat dissipation performance of the stator 200, further improving the heat dissipation performance of the motor 1000. The coils 220 can be wound directly on the central rod in a direct winding method or a layered winding method. The permanent magnets can be neodymium iron boron permanent magnets, cobalt iron permanent magnets, barium ferrite permanent magnets, or samarium cobalt permanent magnets. The acting force is the magnetic force effect caused by the interaction of the magnetic field generated by the current passing through the coils and the magnetic field generated by the permanent magnets. The direct contact between the central rod 400 and the stator 200 can make them have no gap, the heat conduction path is shorter, and the heat conduction is faster. This helps to quickly conduct the heat generated by the stator to the central rod, improving the overall heat conduction efficiency.

[0051] In the embodiments provided in the present application, the coils 220 include first part coils and second part coils, the first part coils are wound on the central rod 400 and surround the first cooling flow channel 410, and the second part coils are wound on the central rod 400 and surround the second cooling flow channel 621. The projection of the first cooling flow channel 410 in the radial direction of the central rod 400 coincides with the first part coils, and the projection of the second cooling flow channel 621 in the radial direction of the central rod 400 coincides with the second part coils. At least part of the first part coils constitutes at least part of the second part coils. It can be understood that in the projection in the radial direction of the central rod 400, the first cooling flow channel and the second cooling flow channel overlap, the first cooling medium in the first cooling flow channel can cool the second part coils in addition to cooling the first part coils, and the second cooling medium in the second cooling flow channel can cool the first part coils in addition to cooling the second part coils. In the process of phase change of the first cooling medium in the first cooling flow channel 410, the first cooling medium can also exchange heat with the second part coils. In the process of oscillation of the second cooling medium in the second cooling flow channel 621, the second cooling medium in the second cooling flow channel 621 can exchange heat with the first part coils. The first cooling medium and the second cooling medium can also exchange heat.

[0052] In some embodiments, the coil surrounds the center rod 400 and is in contact with the outer peripheral surface of the center rod 400, increasing the contact area of the coil 220 with the center rod 400, which can further improve the heat dissipation performance of the stator 200. Direct contact can eliminate the gap between the coil and the center rod surface, increasing the contact area. A larger contact surface helps to conduct heat more effectively and improves heat dissipation efficiency. It can accelerate the conduction of heat from the coil to the center rod. This helps to quickly transfer the heat generated by the coil to the center rod and dissipate it through the center rod.

[0053] In some embodiments, the mover 300 surrounds the stator 200, and there is an air gap between the mover 300 and the stator 200, which can enhance the interaction of the magnetic field of the stator 200 and the magnetic field of the mover 300, improving the performance of the motor 1000. The air gap is an obstacle to the conduction of the magnetic field. When current passes through the stator 200, the generated magnetic field will conduct to the air gap. Due to the low magnetic conductivity in the air gap, the magnetic resistance is large, and the magnetic field will concentrate in the air gap. In this way, the magnetic field in the air gap is higher, enhancing the effect of the magnetic field. The air gap can increase the density of the magnetic flux. The magnetic flux is the density of the magnetic field lines per unit area, and the air gap makes the magnetic field concentrate in a smaller space, resulting in an increase in the density of the magnetic field lines per unit area, thereby enhancing the effect of the magnetic field. The air gap design helps to optimize the coupling effect of the magnetic field. The air gap between the stator and the mover can adjust the conduction and distribution of the magnetic field, making the magnetic field coupling between the two more closely. Thus, the interaction of the magnetic field of the stator 200 and the magnetic field of the mover 300 is enhanced, improving the performance of the motor 1000.

[0054] In the embodiments provided in the present application, the linear motor 1000 is provided with a guide structure, the guide structure comprises a stator guide portion arranged on the stator and a mover guide portion arranged on the mover, at least part of the first cooling flow channel 410 is arranged on the stator guide portion, and at least part of the second cooling flow channel 621 is arranged on the mover guide portion. The stator guide portion further comprises a second stator guide portion 212, the mover guide portion further comprises a second mover guide portion 312, the shell 100 is provided with a receiving cavity 110, at least part of the stator 200 is arranged in the receiving cavity 110, the shell 100 is provided with an opening 120, the center rod 400 is arranged in the opening 120 and cooperates with the opening 120, so that the opening 120 forms the second mover guide portion 312, and the center rod 400 forms the second stator guide portion 212. The mover guide portion and the stator guide portion can slide relative to each other, and during the relative sliding of the mover guide portion and the stator guide portion, the mover 300 moves linearly relative to the stator 200. The first cooling flow channel 410 is arranged in the first stator guide portion 211 and the second stator guide portion 212. The second cooling flow channel 621 is arranged in the first mover guide portion 311. It should be noted that the first mover guide portion 311 and the first stator guide portion 211 are in sliding cooperation, and the second mover guide portion 312 and the second stator guide portion 212 are in sliding cooperation, the first mover guide portion 311, the first stator guide portion 211, the second mover guide portion 312 and the second stator guide portion 212 all extend along the axial direction of the center rod 400, which can improve the stability of the mover 300 and the stator 200 during the reciprocating motion, and the mover 300 is not easy to deviate during the motion. In the embodiments provided in the present application, the shell 100 has a first end and a second end arranged in the axial direction, the opening 120 is formed in the first end, and the first mover guide portion 311 is formed in the second end and extends from the second end to the first end.

[0055] In the embodiments provided in the present application, the motor 1000 is provided with a first guide structure and a second guide structure, and the relative motion of the stator and the mover can be more smooth through the first guide structure and the second guide structure.

[0056] In the embodiments provided in the present application, when the mover 300 moves, the shell 100 and the center rod 400 slide relative to each other. The center rod 400 is substantially cylindrical. The cylindrical design makes the surface of the center rod 400 more uniform, which is conducive to sliding between the shell 100 and the center rod 400, reduces possible friction and instability, and has good axial stability, so that the relative sliding motion can be maintained during the motion of the mover 300.

[0057] In the embodiments provided in the present application, please refer to Figure 4 and Figure 5The motor 1000 further comprises a heat dissipation assembly 500, the heat dissipation assembly 500 is in contact with the part of the center rod 400 extending out of the accommodating cavity 110, the heat dissipation assembly 500 can dissipate heat for the part of the center rod 400 extending out of the accommodating cavity 110, and the heat dissipation efficiency of the motor 1000 is improved. When the heat dissipation assembly 500 dissipates heat for the part of the center rod 400 extending out of the accommodating cavity 110, the condensation efficiency of the first cooling medium in the first liquid ring 411 can be accelerated, and the heat dissipation efficiency inside the accommodating cavity 110 and the stator 200 is further improved.

[0058] In some embodiments, the heat dissipation assembly 500 comprises a fan 510, heat dissipation fins 520 and a uniform heat plate 530, the uniform heat plate 530 is in contact with the part of the center rod 400 extending out of the accommodating cavity 110, the heat dissipation fins are connected with the uniform heat plate 530, and the fan 510 is used for air cooling the heat dissipation fins 520. The uniform heat plate 530 can conduct heat for the center rod 400 and dissipate heat, the heat dissipation fins 520 are in contact with the uniform heat plate 530, and the purpose of the uniform heat plate 530 is to uniformly distribute the heat of the center rod 400 to the heat dissipation fins. The heat dissipation fins have a large outer surface and can dissipate heat for the uniform heat plate 530. The fan 510 can accelerate the flow of air, and the flowing air can accelerate the dissipation of heat of the heat dissipation fins 520. The fan 510 can be an axial fan, a centrifugal fan or a mixed flow fan. The heat dissipation fins 520 and the uniform heat plate 530 can be made of a metal with high heat conduction performance, such as aluminum or copper, which can transfer heat faster. The surface texture is processed by grooving and scalation to increase the heat dissipation surface area and thus increase the heat transfer.

[0059] In the embodiments provided in the present application, the shell 100 is also provided with an opening 130 in communication with the accommodating cavity 110. The opening 120 and the opening 130 are respectively arranged at two ends of the shell 100. Specifically, the opening 120 and the opening 130 are arranged along the axial direction of the center rod 400, and the opening 130 is arranged below the opening 120. The motor 1000 is also provided with an end cover 600. The end cover 600 is fixedly connected with the shell 100 and seals the opening 130. The end cover 600 has a heat dissipation effect to reduce the temperature in the shell 100 and the accommodating cavity 110. When the magnetic field generated by the rotor 300 interacts with the magnetic field generated by the stator 200, the heat generated by the rotor 300 can be transmitted to the end cover 600 through the shell 100, and the end cover 600 can dissipate the heat of the shell 100. The heat of the accommodating cavity 110 can also be transmitted to the end cover 600, and the end cover 600 improves the heat dissipation efficiency in the accommodating cavity 110. The opening 130 is arranged below the opening 120 along the axial direction of the center rod 400, forming a continuous heat transfer channel, optimizing the heat transfer path, enhancing the heat transfer effect inside the shell, ensuring that the temperature inside the entire motor can be effectively controlled and dissipated, promoting more efficient heat dissipation, and making the heat more smoothly transferred from the inside of the motor to the surface of the shell. The end cover 600 is a medium for heat transfer, which transmits heat from the inside of the motor to the surface of the end cover, making it easier to dissipate heat.

[0060] In the embodiments provided in the present application, the end cover 600 includes a body portion 610 and a guide rod 620. The guide rod 620 is protruded from the inner surface of the body portion 610. The inner surface of the body portion 610 is a surface facing the accommodating cavity 110. The center rod 400 is provided with a limiting groove 420 along the axial direction thereof. The limiting groove 420 is fixedly provided with a sliding bearing 430, and the guide rod 620 extends into the sliding bearing 430. The guide rod 620 and the center rod 400 can move relative to each other. The guide rod 620 is protruded from the inner surface of the body portion 610 and extends into the sliding bearing 430, which can limit the movement range of the center rod 400. This ensures that the center rod moves stably and avoids swinging and moving beyond the designed range.

[0061] In the embodiments provided in the present application, the coil 220 can generate a magnetic field when energized. The interaction between the magnetic field generated by the stator 200 and the magnetic field generated by the permanent magnet can make the permanent magnet and the shell 100 move along the axial direction of the center rod 400, and the center rod 400 guides the shell 100. According to the Ampere loop law, a magnetic field is generated around the energized coil 220. The direction and size of the magnetic field are related to the direction and size of the current. This magnetic field interacts with the magnetic field generated by the permanent magnet. The interaction generates a force that makes the permanent magnet and the shell 100 move along the axial direction of the center rod 400. This interaction is caused by the mutual attraction or repulsion between the magnetic fields.

[0062] The shell 100 can drive the end cover 600 to move when moving along the axis of the center rod 400, so that the guide rod 620 moves relative to the center rod 400, and the center rod 400 can guide the movement of the guide rod 620. The guide rod 620 is substantially cylindrical and can move linearly relative to the center rod 400. When the shell 100 moves along the axis of the center rod 400, the movement is also transmitted to the end cover 600, and the end cover 600 moves accordingly. The center rod 400 provides guidance and limiting action for the movement of the guide rod 620, and the guide rod 620 can move linearly under the movement of the shell and the end cover. The cylindrical shape ensures relatively stable linear movement.

[0063] The end cover 600 further comprises a heat dissipation portion 630 protruding from the outer surface of the body portion 610, which can dissipate heat from the inside of the shell 100 and the accommodating cavity 110. The outer surface of the body portion 610 is the surface of the body portion 610 facing away from the accommodating cavity 110. The heat dissipation portion 630 can be made of metal or other heat dissipation materials to increase the surface area and improve the heat transfer efficiency. The protruding design can enable the heat to be conducted from the inside of the device to the surface of the end cover 600 more quickly, and then released to the surrounding environment through the heat dissipation effect of the surface of the end cover 600.

[0064] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0065] The first, second and various numerical numbers referred to herein are only for the convenience of differentiation in description, and do not limit the scope of the present application.

[0066] It should be understood that in various embodiments of the present application, the size of the sequence number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0067] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A linear motor, characterized in that, include: Stator; the stator includes a center rod, on which a first cooling channel is provided, and on which a coil is provided; The mover is capable of moving relative to the stator, and the mover is provided with a sealed second cooling channel; The first cooling channel includes a first liquid collecting ring, a second liquid collecting ring, and a plurality of through holes. The first liquid collecting ring and the second liquid collecting ring are spaced apart along the axial direction of the central rod. The plurality of through holes are distributed along the circumferential direction of the central rod. Each through hole connects the first liquid collecting ring and the second liquid collecting ring. The second liquid collecting ring is provided with a first cooling medium that can absorb energy and vaporize. The motor is provided with a guide structure, which includes a stator guide portion disposed on the stator and a mover guide portion disposed on the mover. At least a portion of the first cooling channel is disposed on the stator guide portion, and at least a portion of the second cooling channel is disposed on the mover guide portion. The stator guide portion includes a first stator guide portion, the mover guide portion includes a first mover guide portion, the first stator guide portion is provided on the center rod, the first stator guide portion forms a cavity, and the cavity cooperates with the first mover guide portion; The mover also includes a housing, on which a guide rod is provided, the guide rod being formed as the guide portion of the first mover; The second cooling channel is disposed within the first mover guide section; The second cooling channel extends axially along the mover guide portion; The second cooling channel is used to fill the second cooling medium, the volume of which is smaller than the volume of the second cooling channel.

2. The linear motor as described in claim 1, characterized in that, The first cooling channel and the second cooling channel are isolated from each other.

3. The linear motor as described in claim 1, characterized in that, The projection of the first cooling channel in the radial direction of the central rod at least partially coincides with the coil, and the projection of the second cooling channel in the radial direction of the central rod at least partially coincides with the coil.

4. The linear motor as described in claim 1, characterized in that, The projection of the first cooling channel in the radial direction of the central rod coincides with the projection of the first portion of the coil, and the projection of the second cooling channel in the radial direction of the central rod coincides with the projection of the second portion of the coil. At least a portion of the first portion of the coil is configured as at least a portion of the second portion of the coil.

5. The linear motor as described in claim 1, characterized in that, The stator guide portion further includes a second stator guide portion, and the mover guide portion further includes a second mover guide portion. The housing is provided with a receiving cavity, and at least a portion of the stator is disposed in the receiving cavity. The housing is provided with an opening, and the central rod passes through the opening and cooperates with the opening so that the opening forms a second mover guide portion, and the central rod forms a second stator guide portion.

6. The linear motor as described in claim 5, characterized in that, The second stator guide portion can extend out of the opening.

7. The linear motor as described in claim 5, characterized in that, The housing has a first end and a second end arranged axially opposite to each other. The opening is formed at the first end, and the first moving part is formed at the second end and extends from the second end to the first end.

8. The linear motor as described in claim 5, characterized in that, The first cooling channel is disposed within the first stator guide portion and the second stator guide portion.

9. The linear motor as described in claim 1, characterized in that, The mover also includes a housing, inside which is a receiving cavity, and the coil is located inside the receiving cavity.

10. The linear motor as described in claim 1, characterized in that, The motor is equipped with a first guide structure and a second guide structure, which are mounted on the mover.

11. The linear motor as described in claim 5, characterized in that, The motor also includes a heat dissipation component, which contacts the portion of the central rod that extends out of the housing.

12. The linear motor as described in claim 11, characterized in that, The heat dissipation assembly includes a fan, heat dissipation fins, and a heat spreader. The heat spreader contacts the portion of the central rod that extends out of the housing. The heat dissipation fins are connected to the heat spreader. The fan is used to blow air onto the heat dissipation fins.

13. A vehicle, characterized in that, The vehicle includes a linear motor as described in any one of claims 1-12.

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