Stator structure and brushless motor

Abstract

The present application relates to the field of motor technology, and in particular to a stator structure and a brushless motor, wherein the stator structure includes a stator core, a cooling assembly, and a plurality of flap assemblies; a plurality of stator windings are provided in the stator core; the cooling assembly includes a sleeve, a guide plate, and heat dissipation fins; a cooling chamber filled with a heat-conducting medium is formed between the sleeve and the stator core; the guide plate is spirally shaped to divide the cooling chamber into a spiral path, and the connecting channel in the heat dissipation fins realizes a circulation connection between the two ends of the cooling chamber; the flap assembly includes a first flip plate, a second flip plate, an elastic member, and a magnetic member; the repulsive force generated by the magnetic field generated by the stator winding and the magnetic member controls the deflection of the first flip plate and the second flip plate, so that the heat-conducting medium circulates in the cooling chamber. The present application has the effect of reducing the complexity and cost of the liquid cooling heat dissipation system, and improving the heat dissipation efficiency and the scope of application.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a stator structure and a brushless motor. Background Art

[0002] As efficient, low-noise power devices, electric motors are widely used in modern industry and daily life. With technological advancements, the performance of electric motors continues to improve, particularly in terms of high power density and reliability. An efficient heat dissipation system is a key factor in ensuring the long-term and stable operation of electric motors. It not only extends the lifespan of the motor but also improves its efficiency and stability. Therefore, further optimizing the heat dissipation performance of electric motors has become a research focus.

[0003] In the prior art, the heat dissipation methods of the motor stator mainly include natural cooling, forced air cooling, liquid cooling and other forms. Natural cooling mainly relies on natural convection heat dissipation between the motor housing and the stator core, but the efficiency is low, especially in high power density applications. Forced air cooling increases air flow by setting a fan inside or outside the motor to take away the heat generated by the stator winding and core. This heat dissipation method is more efficient, but may be affected by factors such as dust accumulation. Liquid cooling technology sets a coolant circulation system inside or outside the motor, and uses the high specific heat capacity and good thermal conductivity of the liquid to quickly transfer heat to the radiator and dissipate it into the environment.

[0004] However, although existing liquid cooling systems have efficient heat dissipation capabilities, they require additional liquid cooling equipment and coolant circulation equipment, such as cooling towers and circulation pumps. These devices require more space for layout and installation, and some equipment also requires additional power supply, which greatly increases the complexity and cost of the entire system. Especially in some compact application scenarios, traditional liquid cooling systems are difficult to meet the needs. Summary of the Invention

[0005] In order to reduce the complexity and cost of liquid cooling systems and improve heat dissipation efficiency and scope of application, the present application provides a stator structure and a brushless motor.

[0006] A stator structure provided in this application adopts the following technical solution:

[0007] A stator structure, comprising:

[0008] A stator core, wherein a plurality of stator windings are provided in the stator core and are capable of generating a magnetic field when energized;

[0009] A cooling assembly, comprising a sleeve, a guide plate, and a plurality of heat dissipation fins. The sleeve is sleeved on the outside of the stator core, a cooling cavity is formed between the sleeve and the stator core, and a heat-conducting medium is contained in the cooling cavity. The guide plate is disposed in the cooling cavity for connecting the sleeve and the stator core, and the guide plate is spirally shaped to divide the cooling cavity into a spiral shape. The plurality of heat dissipation fins are disposed on the outside of the sleeve, and a communication channel is formed in the heat dissipation fins, through which the two ends of the cooling cavity are circulated and connected.

[0010] A plurality of flap assemblies, wherein the plurality of flap assemblies are arranged in the cooling chamber and are all located within the magnetic field range of the stator winding; the flap assembly comprises a first flip plate, a first elastic member, a second flip plate, a second elastic member and a magnetic member; the first flip plate is rotatably connected to the inner wall of the sleeve; a flow hole for heat-conducting medium to flow through is provided on the first flip plate; the first elastic member is used to deflect the first flip plate toward the direction close to the stator core; the second flip plate is rotatably connected to the side of the first flip plate close to the stator core; the second elastic member is used to deflect the second flip plate toward the direction close to the stator core; the magnetic member is arranged on the second flip plate; when the stator winding is close to the side of the magnetic member When the magnetic pole is the same as the magnetic pole on the side of the magnetic part close to the stator winding, the magnetic part repels the stator winding and can drive the second flip plate to deflect in the direction away from the stator core, and then fold with the first flip plate and block the flow hole. The second flip plate can drive the first flip plate to deflect in the direction away from the stator core, and the heat-conducting medium flows in the cooling chamber under the action of the deflection of the first flip plate and / or the second flip plate; when the stator winding does not generate a magnetic field or the magnetic pole on the side of the stator winding close to the magnetic part is different from the magnetic pole on the side of the magnetic part close to the stator winding, the first flip plate and the second flip plate can be deflected and reset in the direction close to the stator core, and the second flip plate can be unfolded relative to the first flip plate and open the flow hole.

[0011] By adopting the above technical solution, the stator structure can significantly reduce the complexity and cost of the liquid cooling system and improve the scope of application while ensuring efficient heat dissipation, and can also make the heat-conducting medium flow along a certain path without adding additional driving equipment; specifically, the sleeve can directly serve as the outer shell of the motor, and the spiral guide plate design makes the heat-conducting medium in the cooling chamber flow along the spiral path, which increases the heat exchange area and time between the heat-conducting medium and the stator core; the design of the flap assembly cleverly uses the change of the magnetic field of the stator winding to control the flow direction of the heat-conducting medium; when the stator winding repels the magnetic attraction part, the magnetic part will drive the first flip plate and the second flip plate to deflect, The flow hole is closed and the heat-conducting medium is pushed to the side where the first flip plate and the second flip plate are deflected; when the stator winding is attracted to the magnetic attraction part or the stator winding does not generate a magnetic field, the first flip plate and the second flip plate will be reset under the action of the first elastic part and the second elastic part; this reciprocating movement allows the heat-conducting medium to form a dynamic circulation in the cooling chamber and dissipate heat to the outside through the heat dissipation fins; this design avoids the occurrence of local overheating of the stator, helps to maintain the stability of the stator working temperature, and extends its service life without the need to add additional drive equipment; in summary, this solution effectively solves the problems of high complexity and high cost of traditional liquid cooling systems, and is suitable for various compact application scenarios.

[0012] Optionally, the moment of the first elastic member resisting the first flip plate from deflecting and folding toward the stator core is smaller than the moment of the second elastic member resisting the second flip plate from deflecting toward the stator core.

[0013] By adopting the above technical solution, when the magnetic part and the stator winding repel each other, the second flip plate will first be deflected in the direction of one end away from the first flip plate toward the first flip plate, and the second flip plate will push the heat-conducting medium into the flow hole, and the heat-conducting medium will flow toward the side where the first flip plate is deflected; after the first flip plate and the second flip plate are folded, the flow hole is blocked by the first flip plate, and at this time, the end of the second flip plate close to the stator core begins to deflect in the direction away from the stator core under the action of repulsive force, and the first flip plate and the second flip plate further push the heat-conducting medium in its flow direction, thereby accelerating the flow speed of the heat-conducting medium, further enhancing the flow effect of the heat-conducting medium in the cooling chamber, and improving the heat dissipation efficiency.

[0014] Optionally, when the second flip plate is unfolded relative to the first flip plate, the position of the second flip plate is always in a state that has the least impact on the flow of the heat-conducting medium in the cooling cavity.

[0015] By adopting the above technical solution, the influence of the second flip plate on the fluidity of the heat-conducting medium during the resetting process can be effectively reduced, and the heat-conducting medium can be avoided from being pushed in the opposite direction of its normal flow direction during flipping, thereby ensuring the smooth flow of the heat-conducting medium in the cooling chamber and further improving the heat dissipation efficiency.

[0016] Optionally, a filter element for filtering impurities in the heat-conducting medium is provided in the communicating channel, and the filter element is detachably connected to the heat dissipation fins.

[0017] By adopting the above technical solution, the filter element can effectively filter impurities such as iron powder in the heat-conducting medium, preventing impurities from clogging the connecting channels and the cooling cavity, thereby ensuring the smooth flow of the heat-conducting medium and the heat dissipation efficiency.

[0018] Optionally, a snap-fit block is provided on the heat dissipation fin, and a snap-fit groove matching the snap-fit block is provided on the outer wall of the sleeve. The heat dissipation fin is detachably connected to the sleeve through the snap-fit cooperation between the snap-fit block and the snap-fit groove; after disassembling the heat dissipation fin, the filter element can be taken out from the connecting channel.

[0019] By adopting the above technical solution, the detachable connection design between the cooling fins and the sleeve not only facilitates the replacement and maintenance of the filter element, but also improves the flexibility of the cooling fin installation and the convenience of maintenance; this design makes it easy to remove the cooling fins without disassembling other components, which is convenient for cleaning and inspection of the filter element in the connecting channel, thereby ensuring the cleanliness of the heat transfer medium, which can further improve the heat dissipation efficiency of the stator and the operating stability of the motor.

[0020] Optionally, the sleeve is provided with a first connecting hole and a second connecting hole, respectively connecting the two ends of the cooling chamber, and the end of the first connecting hole facing away from the cooling chamber and the end of the second connecting hole facing away from the cooling chamber both extend into the snap-fit groove; when the heat dissipating fins are snap-fitted to the sleeve, the heat dissipating fins are sealed and abutted against the sleeve, and the connecting channel circulates and connects the two ends of the cooling chamber through the first connecting hole and the second connecting hole.

[0021] By adopting the above technical solution, the connecting channel connects the two ends of the cooling cavity through the first connecting hole and the second connecting hole, so that the heat-conducting medium flows into the connecting channel from one end of the cooling cavity, dissipates heat through the heat dissipation fins, and then flows into the cooling cavity from the other end of the cooling cavity, so that the heat-conducting medium can circulate in the cooling cavity, effectively enhancing the heat transfer effect of the heat-conducting medium and further improving the heat dissipation performance of the entire stator structure.

[0022] Optionally, the sleeve may also be connected to a blocking block for replacing the heat dissipation fins and blocking the first communicating hole and the second communicating hole through a snap-in groove.

[0023] By adopting the above technical solution, the position and number of the heat dissipation fins can be selected according to actual needs in different application scenarios of the motor, thereby optimizing the heat dissipation effect and ensuring that the installation space of the motor is effectively utilized; specifically, when there is sufficient installation space, all the heat dissipation fins can be installed to achieve the best heat dissipation effect; and in some compact installation occasions, the heat dissipation fins can be installed at appropriate positions on the sleeve, and at certain positions on the sleeve that are not suitable for installing heat dissipation fins, the first connecting hole and the second connecting hole can be effectively closed by installing a blocking block, thereby reducing the overall size of the motor and making it more suitable for limited space environments.

[0024] Optionally, a sealing gasket is provided at the opening of the first communicating hole at one end in the snap-fit groove and the opening of the second communicating hole at one end in the snap-fit groove.

[0025] By adopting the above technical solution, the provision of the sealing gasket can effectively prevent the heat-conducting medium from leaking from the connection between the sleeve and the heat dissipation fins or the blocking block, thereby improving the sealing performance of the cooling cavity and the communicating channel.

[0026] Optionally, the sleeve is provided with an input nozzle and an output nozzle connected to the cooling cavity.

[0027] By adopting the above technical solution, the provision of the input nozzle and the output nozzle facilitates the injection and discharge of the heat transfer medium, simplifies maintenance operations, and improves the flexibility and usability of the system.

[0028] As another aspect of the present invention, a brushless motor having the stator structure is provided.

[0029] In summary, this application has the following beneficial technical effects:

[0030] 1. The stator structure can significantly reduce the complexity and cost of the liquid cooling system and improve the scope of application while ensuring efficient heat dissipation. It can also ensure that the heat-conducting medium flows along a certain path without adding additional driving equipment. Specifically, the sleeve can directly serve as the outer shell of the motor, and the spiral guide plate design allows the heat-conducting medium in the cooling chamber to flow along a spiral path. This design increases the heat exchange area and time between the heat-conducting medium and the stator core. The design of the flap assembly cleverly utilizes the change of the magnetic field of the stator winding to control the flow direction of the heat-conducting medium. When the stator winding repels the magnetic attraction component, the magnetic component will drive the first flip plate and the second flip plate to deflect to close the flow. The hole pushes the heat-conducting medium toward the side where the first flip plate and the second flip plate are deflected; when the stator winding is attracted to the magnetic attraction member or the stator winding does not generate a magnetic field, the first flip plate and the second flip plate will be reset under the action of the first elastic member and the second elastic member; this reciprocating movement allows the heat-conducting medium to form a dynamic circulation in the cooling chamber and dissipate heat to the outside through the heat dissipation fins; this design avoids the occurrence of local overheating of the stator, helps to maintain the stability of the stator operating temperature, and prolongs its service life without the need for additional drive equipment; in summary, this solution effectively solves the problems of high complexity and high cost of traditional liquid cooling systems and is suitable for various compact application scenarios;

[0031] 2. When the magnetic element and the stator winding repel each other, the end of the second flip plate away from the first flip plate will first deflect toward the first flip plate. The second flip plate will push the heat-conducting medium into the flow hole, and the heat-conducting medium will flow toward the side where the first flip plate is deflected. After the first flip plate and the second flip plate are folded, the flow hole is blocked by the first flip plate. At this time, the end of the second flip plate close to the stator core begins to deflect away from the stator core under the action of repulsive force. The first and second flip plates further push the heat-conducting medium in the direction of its flow, accelerating the flow speed of the heat-conducting medium, further enhancing the flow effect of the heat-conducting medium in the cooling chamber, and improving heat dissipation efficiency.

[0032] 3. The position and number of the heat dissipation fins can be selected according to actual needs in different application scenarios of the motor, thereby optimizing the heat dissipation effect and ensuring that the installation space of the motor is effectively utilized; specifically, when there is sufficient installation space, all the heat dissipation fins can be installed to achieve the best heat dissipation effect; and in some compact installation occasions, the heat dissipation fins can be installed at appropriate positions on the sleeve, and at certain positions on the sleeve that are not suitable for installing heat dissipation fins, the first connecting hole and the second connecting hole can be effectively closed by installing a blocking block, thereby reducing the overall size of the motor and making it more suitable for limited space environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0034] Figure 2 It is a schematic diagram of the internal structure of Example 1 of the present application.

[0035] Figure 3 This is a top sectional view of Example 1 of the present application.

[0036] Figure 4 This is a schematic diagram of the motion trajectory of the flip assembly of Example 1 of the present application.

[0037] Explanation of the accompanying drawings: 1. Stator core; 2. Stator winding; 3. Cooling assembly; 31. Sleeve; 311. Snap-fit groove; 312. First connecting hole; 313. Second connecting hole; 32. Guide plate; 33. Heat dissipation fin; 34. Cooling chamber; 35. Connecting channel; 4. Flip plate assembly; 41. First flip plate; 411. Circulation hole; 42. First elastic member; 43. Second flip plate; 44. Second elastic member; 45. Magnetic member; 5. Filter element; 6. Snap-fit block; 7. Sealing block; 8. Sealing gasket; 9. Input nozzle; 10. Output nozzle. DETAILED DESCRIPTION

[0038] The following combination Figures 1-4 This application is described in further detail.

[0039] An embodiment of the present application discloses a stator structure.

[0040] Example 1

[0041] Reference Figure 1 and Figure 2 In this embodiment, the stator structure includes a stator core 1, a cooling assembly 3, and multiple flap assemblies 4. Specifically, the stator core 1 is composed of multiple layers of laminated silicon steel sheets, exhibiting good magnetic permeability and low eddy current losses. The stator core 1 is cylindrical in shape and internally houses multiple stator windings 2. These stator windings 2 are wound with enameled copper wire, exhibiting excellent electrical conductivity and high-temperature resistance. When energized, these stator windings 2 generate a magnetic field.

[0042] The cooling assembly 3 includes a sleeve 31, a guide plate 32 and a plurality of heat dissipation fins 33; the sleeve 31 is made of aluminum alloy material, has high thermal conductivity and is lightweight, and the surface of the sleeve 31 is anodized to enhance wear resistance and corrosion resistance; the sleeve 31 is sleeved on the outside of the stator core 1 to act as the outer shell of the motor, and the inner diameter of the sleeve 31 is slightly larger than the outer diameter of the stator core 1, and a cooling chamber 34 is formed between the two; the length of the sleeve 31 matches the length of the stator core 1, and both ends of the sleeve 31 are provided with a convex ring structure protruding into the inner cavity of the sleeve 31, and the inner wall of the convex ring structure is sealed against the outer wall of the stator core 1 to fix the sleeve 31 to the stator and seal the two ends of the cooling chamber 34, so that the cooling chamber 34 is a closed chamber; the cooling chamber 34 is filled with a heat-conducting medium, and the heat-conducting medium can be synthetic heat-conducting oil, which has excellent thermal conductivity and non-conductivity. In other embodiments, the sleeve 31 may also be made of other materials with good thermal conductivity and high strength, such as stainless steel, magnesium-aluminum alloy, etc., and the heat-conducting medium may also be other non-conductive cooling liquids or gases.

[0043] Reference Figure 2 and Figure 3 In this embodiment, the guide plate 32 is also made of aluminum alloy material. The guide plate 32 is arranged in the cooling chamber 34. The guide plate 32 and the sleeve 31 are an integrated structure. One side of the guide plate 32 is connected to the inner wall of the sleeve 31, and the other side is abutted against the outer wall of the stator core 1. The guide plate 32 is arranged in a spiral upward shape as a whole, thereby dividing the cooling chamber 34 into a spiral shape. This design not only enhances the connection strength between the sleeve 31 and the stator core 1, but also reduces the turbulence of the heat-conducting medium in the cooling chamber 34, thereby improving the heat exchange efficiency. In other embodiments, the guide plate 32 and the sleeve 31 can be a split structure, and the guide plate 32 is fixed to the inner wall of the sleeve 31; the material of the guide plate 32 can also be stainless steel, magnesium-aluminum alloy, or other materials with good thermal conductivity and high strength.

[0044] The heat dissipation fins 33 are also made of aluminum alloy material, which has good thermal conductivity and corrosion resistance. The heat dissipation fins 33 are long strips, and multiple heat dissipation fins 33 are equidistantly arranged on the outer wall of the sleeve 31 along the central axis of the sleeve 31. A clamping block 6 is provided on one side of the length direction of the heat dissipation fin 33. The clamping block 6 is a raised structure on the heat dissipation fin 33. The clamping block 6 extends from one end of the heat dissipation fin 33 to the other end along the length direction of the heat dissipation fin 33. The outer wall of the sleeve 31 is provided with a plurality of heat dissipation fins 33. A clamping groove 311 matching the clamping block 6 is provided on the top, and the clamping groove 311 passes through the two end surfaces of the sleeve 31 along the length direction of the sleeve 31; aligning the clamping block 6 with the clamping groove 311 and pushing the heat dissipation fins 33 to slide along the extension direction of the clamping groove 311 can make the heat dissipation fins 33 seal against the sleeve 31 and clamped in the clamping groove 311 to be fixed to the sleeve 31; in this way, the heat dissipation fins 33 can be detachably connected to the sleeve 31, so as to facilitate the disassembly and maintenance of the heat dissipation fins 33.

[0045] A connecting channel 35 is defined within the heat dissipation fin 33. Specifically, the connecting channel 35 is a long slot formed on the narrow side of the heat dissipation fin 33 along its length, where it seals against the sleeve 31. A first connecting hole 312 and a second connecting hole 313 are defined at each end of the sleeve 31, connecting to the cooling chamber 34. The first connecting hole 312, facing away from the cooling chamber 34, extends into the engaging groove 311 and connects to one end of the connecting channel 35. The second connecting hole 313, facing away from the cooling chamber 34, extends into the engaging groove 311 and connects to the end of the connecting channel 35 facing away from the first connecting hole 312. This connects the two ends of the cooling chamber 34 through the connecting channel 35, allowing heat transfer medium to enter the connecting channel 35 and dissipate heat to the outside through the heat dissipation fins 33, thereby improving cooling performance. In other embodiments, the heat dissipation fins 33 can be secured to the sleeve 31 using other commonly used detachable connections, such as screws. The heat dissipation fins 33 can also be made of other materials with good thermal conductivity and strength, such as stainless steel or a magnesium-aluminum alloy.

[0046] Reference Figure 2 and Figure 3 In this embodiment, an input nozzle 9 and an output nozzle 10 connected to the cooling chamber 34 are provided on the outer wall of the sleeve 31; the heat-conducting medium can be added to the cooling chamber 34 through the input nozzle 9, and the heat-conducting medium in the cooling chamber 34 can be discharged through the output nozzle 10; this makes it easier and faster to replace the heat-conducting medium; the sleeve 31 can also be connected to the blocking block 7 for replacing the heat dissipation fins 33 and blocking the first connecting hole 312 and the second connecting hole 313 through the snap-in groove 311, so that the position and number of the heat dissipation fins 33 can be selected according to actual needs in different application scenarios of the motor, thereby optimizing the heat dissipation effect and reducing the overall size of the motor, making it more suitable for limited space environments.

[0047] Reference Figure 1 and Figure 2 In this embodiment, multiple flap assemblies 4 are arranged at equal intervals in the cooling chamber 34 along the spiral path of the guide plate 32, each flap assembly 4 is located within the magnetic field range of the stator winding 2, and a single flap assembly 4 will only be affected by the magnetic field of one stator winding 2.

[0048] The flip plate assembly 4 includes a first flip plate 41, a first elastic member 42, a second flip plate 43, a second elastic member 44 and a magnetic member 45; the first flip plate 41 is made of stainless steel, has good strength and corrosion resistance and is non-magnetic; the first flip plate 41 is perpendicular to the horizontal plane and is rotatably connected to the inner wall of the sleeve 31 through a first hinge, the first elastic member 42 is a torsion spring, and the first elastic member 42 is arranged at the first hinge to deflect the first flip plate 41 with the first hinge as the rotating axis toward the stator core 1; the first flip plate 41 is provided with a flow hole 411 for allowing a heat-conducting medium to flow from one side of the first flip plate 41 to the other side of the first flip plate 41.

[0049] The second flip plate 43 is also made of stainless steel, which has good strength and corrosion resistance and is non-magnetic. The second flip plate 43 is perpendicular to the horizontal plane and is rotatably connected to the side of the first flip plate 41 close to the stator core 1 through a second hinge. The second flip plate 43 is arranged at an acute angle relative to the first flip plate 41. The second elastic member 44 is a torsion spring. The second elastic member 44 is arranged at the second hinge to make the second flip plate 43 deflect with the second hinge as the rotation axis, away from the stator core 1 and in the opposite direction to the rotation of the first flip plate 41 by the first elastic member 42. The magnetic member 45 is arranged on the side of the second flip plate 43 close to the stator core 1. The magnetic member 45 is a permanent magnet. When the first flip plate 41 and the second flip plate 43 are in the initial state without external interference, the first flip plate 41, the second flip plate 43 and the inner wall of the sleeve 31 form a "Z shape".

[0050] Reference Figure 3 and Figure 4 When the magnetic pole of the stator winding 2 close to the magnetic member 45 is the same as the magnetic pole of the magnetic member 45 close to the stator winding 2, the magnetic member 45 and the stator winding 2 generate a repulsive force to repel each other; the magnetic member 45 causes the second flip plate 43 to deflect away from the stator core 1 with the second hinge as the rotation axis and fold with the first flip plate 41 to block the flow hole 411; then the second flip plate 43 drives the first flip plate 41 to deflect away from the stator core 1 with the first hinge as the rotation axis; at this time, the heat-conducting medium in the cooling chamber 34 is Under the action of deflection, the rotating plate 43 pushes toward one end of the cooling chamber 34, so that the heat-conducting medium flows in the cooling chamber 34 and the connecting channel 35; when the stator winding 2 does not generate a magnetic field or the magnetic pole of the stator winding 2 close to the magnetic part 45 is different from the magnetic pole of the magnetic part 45 close to the stator winding 2, the first flip plate 41 and the second flip plate 43 are respectively deflected and reset in the direction close to the stator core 1 under the action of the first elastic part 42 and the second elastic part 44, and in this process, the second flip plate 43 is expanded relative to the first flip plate 41 and the flow hole 411 is opened.

[0051] Reference Figure 2 and Figure 3 Preferably, the torque of the first elastic member 42 against the magnetic member 45 to deflect the first flip plate 41 toward the stator core 1 is smaller than the torque of the second elastic member 44 against the second flip plate 43 to deflect the second flip plate 43 toward the stator core 1; in this way, when the magnetic member 45 repels the stator winding 2, the second flip plate 43 will first be deflected in the direction away from the stator core 1 until it is folded with the second flip plate 43, and then the second flip plate 43 will begin to deflect in the direction away from the stator core 1. During this process, the heat-conducting medium will first be pushed by the second flip plate 43 and then flow from the side of the flow hole 411 close to the second flip plate 43 to the side of the flow hole 411 away from the second flip plate 43. Subsequently, after the first flip plate 41 and the second flip plate 43 fold the flow hole 411, the heat-conducting medium is pushed again in its flow direction by the first flip plate 41 and the second flip plate 43, thereby accelerating the flow speed of the heat-conducting medium and further enhancing the heat dissipation efficiency.

[0052] Preferably, when the first flip plate 41 is deflected to the extreme position under the action of the first elastic member 42, the extension direction of the first flip plate 41 on the horizontal plane does not point to the central axis of the sleeve 31, so that the first flip plate 41 has a certain initial deflection angle, preventing the first flip plate 41 from deflecting in the opposite direction of the flow direction of the heat transfer medium, ensuring that the deflection direction of the first flip plate 41 is consistent each time.

[0053] Preferably, when the second flip plate 43 is unfolded relative to the first flip plate 41, the position of the second flip plate 43 is always in a state that has the least impact on the flow of the heat-conducting medium in the cooling chamber 34, that is, the flow direction of the second flip plate 43 and the liquid are close to being parallel; in this way, when the second flip plate 43 is reset, the interference with the flow direction of the heat-conducting medium can be minimized, and the pushing of the second flip plate 43 on the heat-conducting medium in the opposite direction of its flow direction can be reduced.

[0054] Reference Figure 2 In this embodiment, a filter element 5 for filtering impurities in the heat-conducting medium is provided in the connecting channel 35. After the heat dissipation fins 33 are disassembled, the filter element 5 can be taken out of the connecting channel 35 and replaced. This not only facilitates the replacement and maintenance of the filter element 5, but also improves the installation flexibility and maintenance convenience of the heat dissipation fins 33.

[0055] The implementation principle of Example 1 is as follows: when the motor is running, the stator windings 2 in the stator will be energized in a certain order to generate a magnetic field to drive the rotor to rotate; when the magnetic pole of a single stator winding 2 close to the magnetic part 45 is the same as the magnetic pole of the magnetic part 45 close to the stator winding 2, the magnetic part 45 and the stator winding 2 generate a repulsive force to repel each other; the magnetic part 45 causes the second flip plate 43 to deflect away from the stator core 1 with the second hinge as the rotation axis and fold with the first flip plate 41 to block the flow hole 411; then the second flip plate 43 drives the first flip plate 41 to deflect away from the stator core 1 with the first hinge as the rotation axis; at this time, the heat-conducting medium in the cooling chamber 34 is deflected by the first flip plate 41 and / or the second flip plate 43 Under the action of the magnetic element, the magnetic element pushes toward one end of the cooling cavity 34, causing the heat-conducting medium to flow in the cooling cavity 34 and the connecting channel 35. When a single stator winding 2 does not generate a magnetic field or the magnetic pole of the single stator winding 2 close to the magnetic part 45 is different from the magnetic pole of the magnetic part 45 close to the stator winding 2, the first flip plate 41 and the second flip plate 43 are respectively deflected and reset in the direction close to the stator core 1 under the action of the first elastic member 42 and the second elastic member 44. In this process, the second flip plate 43 is unfolded relative to the first flip plate 41 and the flow hole 411 is opened, and the heat-conducting medium flows through the flow hole 411. This process realizes the active flow of the heat-conducting medium through physical action, without the need for additional pumping equipment, reducing the complexity and cost of the system. At the same time, when the heat-conducting medium flows through the connecting channel 35, it exchanges heat with the heat dissipation fins 33 for cooling, thereby improving the heat dissipation performance of the stator. The detachable design of the heat dissipation fins 33 and the design of the custom installation position and number make the application scenarios of the motor more extensive. In summary, the stator structure of this embodiment significantly improves heat dissipation efficiency, simplifies system structure, and reduces costs through clever design and optimization. It is particularly suitable for various compact application scenarios and has wide practical application value.

[0056] Example 2

[0057] A motor according to embodiment 2 of the present application includes the stator structure as described above.

[0058] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A stator structure, characterized in that: include: A stator core (1), wherein a plurality of stator windings (2) are provided in the stator core (1), and the stator windings (2) are capable of generating a magnetic field when energized; A cooling assembly (3), the cooling assembly (3) comprising a sleeve (31), a guide plate (32) and a plurality of heat dissipation fins (33), the sleeve (31) being sleeved on the outside of the stator core (1), a cooling cavity (34) being formed between the sleeve (31) and the stator core (1), the cooling cavity (34) being filled with a heat-conducting medium; the guide plate (32) being arranged in the cooling cavity (34) for connecting the sleeve (31) and the stator core (1), the guide plate (32) being spirally shaped so as to divide the cooling cavity (34) into a spiral shape; the plurality of heat dissipation fins (33) being arranged on the outside of the sleeve (31), a connecting channel (35) being opened in the heat dissipation fins (33), and the two ends of the cooling cavity (34) being circulated and connected through the connecting channel (35); A plurality of flap assemblies (4), wherein the plurality of flap assemblies (4) are arranged in a cooling cavity (34) and are all located within the magnetic field range of the stator winding (2); the flap assembly (4) comprises a first flip plate (41), a first elastic member (42), a second flip plate (43), a second elastic member (44) and a magnetic member (45); the first flip plate (41) is rotatably connected to the inner wall of the sleeve (31); a flow hole (411) for allowing a heat-conducting medium to flow therethrough is provided on the first flip plate (41); the first elastic member (42) is used to deflect the first flip plate (41) toward the stator core (1); the second flip plate (43) is rotatably connected to a side of the first flip plate (41) close to the stator core (1); the second elastic member (44) is used to deflect the second flip plate (43) toward the stator core (1); the magnetic member (45) is arranged on the second flip plate (43); when the stator winding (2) is close to the magnetic member (45 ) side is identical to the magnetic pole of the magnetic member (45) on the side close to the stator winding (2), the magnetic member (45) and the stator winding (2) repel each other and can drive the second flip plate (43) to deflect in a direction away from the stator core (1) and then fold with the first flip plate (41) to block the flow hole (411), the second flip plate (43) can drive the first flip plate (41) to deflect in a direction away from the stator core (1), and the heat conducting medium is heated on the first flip plate (41) and / or the second flip plate (43). The plate (43) is deflected to flow in the cooling cavity (34); when the stator winding (2) does not generate a magnetic field or the magnetic pole of the stator winding (2) close to the magnetic part (45) is different from the magnetic pole of the magnetic part (45) close to the stator winding (2), the first flip plate (41) and the second flip plate (43) can be deflected and reset in the direction close to the stator core (1), and the second flip plate (43) is unfolded relative to the first flip plate (41) and the flow hole (411) is opened.

2. A stator structure according to claim 1, characterized in that: The torque of the first elastic member (42) against the first flip plate (41) deflecting and folding in a direction close to the stator core (1) is smaller than the torque of the second elastic member (44) against the second flip plate (43) deflecting in a direction close to the stator core (1).

3. A stator structure according to claim 1, characterized in that: When the second flip plate (43) is unfolded relative to the first flip plate (41), the position of the second flip plate (43) is always in a state that minimizes the impact on the flow of the heat-conducting medium in the cooling cavity (34).

4. A stator structure according to claim 1, characterized in that: A filter element (5) for filtering impurities in the heat-conducting medium is provided in the communication channel (35).

5. A stator structure according to claim 4, characterized in that: A clamping block (6) is provided on the heat dissipation fin (33), and a clamping groove (311) matching the clamping block (6) is provided on the outer wall of the sleeve (31). The heat dissipation fin (33) is detachably connected to the sleeve (31) through the clamping fit between the clamping block (6) and the clamping groove (311); after the heat dissipation fin (33) is disassembled, the filter element (5) can be taken out of the communication channel (35).

6. A stator structure according to claim 5, characterized in that: The sleeve (31) is provided with a first connecting hole (312) and a second connecting hole (313) respectively connected to the two ends of the cooling chamber (34); the end of the first connecting hole (312) facing away from the cooling chamber (34) and the end of the second connecting hole (313) facing away from the cooling chamber (34) both extend into the clamping groove (311); when the heat dissipation fin (33) is clamped and connected to the sleeve (31), the heat dissipation fin (33) and the sleeve (31) are sealed and abutted, and the connecting channel (35) circulates and connects the two ends of the cooling chamber (34) through the first connecting hole (312) and the second connecting hole (313).

7. A stator structure according to claim 6, characterized in that: The sleeve (31) can also be connected to a blocking block (7) for replacing the heat dissipation fins (33) and blocking the first communicating hole (312) and the second communicating hole (313) through the blocking groove (311).

8. A stator structure according to claim 7, characterized in that: A sealing gasket (8) is provided at the opening of one end of the first communicating hole (312) located in the clamping groove (311) and at the opening of one end of the second communicating hole (313) located in the clamping groove (311).

9. The stator structure according to claim 1, characterized in that: The sleeve (31) is provided with an input nozzle (9) and an output nozzle (10) that are connected to the cooling cavity (34).

10. A brushless motor, characterized in that: The stator structure comprises the stator structure according to any one of claims 1 to 9.

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