electric machine

Abstract

The utility model belongs to motor technical field discloses a kind of motor, including stator assembly and shell, main cavity and air channel of being mutually communicated are equipped in shell, stator assembly is fixed in main cavity, air channel is provided with flow guide rib, flow guide rib is separated and forms multiple air channel of guiding wind in air channel, the import of air channel is communicated in air inlet, the export is communicated in main cavity, each air channel of guiding wind corresponds a winding slot, the projection of the export of air channel of guiding wind at its air outlet direction at least partially covers its corresponding winding slot.The utility model in which, multiple air channel of guiding wind correspond multiple winding slot respectively, the projection of the export of air channel of guiding wind at its air outlet direction at least partially covers its corresponding winding slot, so that the airflow entering from air inlet can be smoothly flowed into winding slot by the guidance of air channel of guiding wind, increase the contact area of airflow and stator assembly, so that ventilation path is more unobstructed, the flow area of airflow is larger, enhanced heat dissipation air pressure, improve heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor. Background Technology

[0002] When an electric motor is running, it generates a lot of heat, which causes the motor temperature to rise. Excessive temperature may lead to problems such as burnt motor windings, decreased magnetic permeability of silicon steel sheets, and demagnetization of permanent magnets. Therefore, reliable heat dissipation plays a crucial role in the stable operation of the motor.

[0003] In the relevant motors, the cooling airflow can only pass through the gap between the stator assembly and the rotor assembly. The contact area with the stator assembly is limited, the ventilation path is tortuous and narrow, and the airflow area is small, resulting in low cooling air pressure and poor cooling efficiency of the motor. Utility Model Content

[0004] The purpose of this invention is to provide a motor that can effectively improve heat dissipation efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Electric motor, including:

[0007] A stator assembly, wherein a plurality of winding slots are arranged circumferentially at intervals;

[0008] The housing has an interconnected main cavity and an air intake channel. The outer wall of the housing has an air inlet, and the air intake channel is connected to the outside through the air inlet. The stator assembly is fixed in the main cavity. The air intake channel has guide ribs that divide the air intake channel into multiple air intake channels. The inlet of each air intake channel is connected to the air inlet, and the outlet is connected to the main cavity. Each air intake channel corresponds to a winding groove, and the projection of the outlet of each air intake channel along its air outlet direction at least partially covers its corresponding winding groove.

[0009] Preferably, the guide ribs include at least two first guide ribs, and an airflow channel is formed between two adjacent first guide ribs.

[0010] Preferably, the guide rib includes a second guide rib, one end of which is connected to the first guide rib, and an airflow channel is formed between the second guide rib and the inner wall of the airflow channel.

[0011] Preferably, there are two first guide ribs, and each of the two first guide ribs is connected to a second guide rib on the opposite side.

[0012] Preferably, the air intake channel is further provided with an air guide plate, the air guide plate and the guide rib are located on the inner walls of opposite sides of the air intake channel, the air guide plate extends along the extension direction of the adjacent air intake channel and extends into the main body cavity.

[0013] Preferably, the housing includes a front shell and a rear shell that are assembled together, a portion of the front shell and a portion of the rear shell are assembled to form the air intake channel, the air inlet is disposed in the front shell, and the guide rib is disposed in the rear shell.

[0014] Preferably, the housing includes a main body and a side arm connected to each other, the main body cavity is disposed in the main body, the air duct is partially disposed in the side arm and partially disposed in the main body, and the air inlet is disposed in the side arm.

[0015] Preferably, the system also includes a controller, which is disposed in the main body cavity, and the terminals of the stator assembly pass through the controller and are electrically connected to the controller.

[0016] Preferably, the system also includes a terminal block disposed in the main body cavity, wherein the terminal block's connection terminals pass through the controller and are electrically connected to the controller.

[0017] Preferably, the through hole on the controller corresponding to the wiring terminal is a first through hole, and the through hole corresponding to the connection terminal is a second through hole, and the diameter of the first through hole and the second through hole are the same.

[0018] Preferably, the system also includes a heat sink, which is fixedly mounted in the main body cavity. The controller is installed on the side of the heat sink away from the stator assembly, and the airflow entering from the air inlet can flow to the side of the heat sink away from the controller.

[0019] Preferably, the housing includes a rear shell, a rear cover, and an intermediate ring. The rear shell is connected to the rear cover via the intermediate ring. The intermediate ring is sleeved on the outer periphery of the heat sink. The rear cover, the heat sink, and the intermediate ring form an isolation cavity, and the controller is disposed in the isolation cavity.

[0020] Preferably, the device also includes a vibration damping component, which is fixedly connected to the rear shell, and the heat sink is mounted on the vibration damping component.

[0021] Preferably, the device also includes a retainer, which is clamped between the controller and the heat sink. The retainer is provided with a positioning post and a retaining hole. The controller is provided with a positioning hole, the positioning post is inserted into the positioning hole, and the retaining hole is sleeved on the terminal block.

[0022] Preferably, the system also includes a rotor assembly, which includes a support shell and a plurality of magnets connected to the support shell. The outer wall of the shell is provided with an outlet, and the main cavity is connected to the outside through the outlet. The support shell is located at the outlet, and the airflow entering from the air inlet can flow out of the shell through the support shell.

[0023] Preferably, a plurality of magnets are evenly distributed in a ring around the outer periphery of the stator assembly, and an air passage is formed between the inner peripheral surface of the rotor assembly and the outer peripheral surface of the stator assembly. An air outlet is provided on the support shell, and the airflow entering from the air inlet can flow sequentially through the heat sink, the air passage and the air outlet.

[0024] Preferably, the rotor assembly further includes a rotor shaft, which is rotatably connected to the housing and / or heat sink, and the support housing is fixedly connected to the rotor shaft.

[0025] Preferably, the heat sink is provided with a support platform, and the rotor shaft is rotatably connected to the support platform.

[0026] Preferably, the assembly also includes an impeller located outside the housing and fixedly connected to the rotor assembly.

[0027] Preferably, the impeller is provided with a guide vane on the side facing the housing. When the impeller rotates, the guide vane can drive the airflow from the support shell to flow out through the gap between the impeller and the housing.

[0028] The beneficial effects of this utility model are:

[0029] The housing includes an interconnected main body cavity and an air intake channel. After the external airflow enters the air intake channel through the air inlet, it can enter the main body cavity under the guidance of the air intake channel and blow towards the stator assembly. On this basis, the guide ribs divide the air intake channel into multiple air intake channels, which correspond to multiple winding slots of the stator assembly. The projection of the outlet of the air intake channel along its air outlet direction at least partially covers its corresponding winding slot, so that the airflow entering from the air inlet can flow smoothly into the winding slot through the guidance of the air intake channel. This increases the contact area between the airflow and the stator assembly 1, making the ventilation path smoother, the airflow area larger, enhancing the heat dissipation air pressure, and improving the heat dissipation efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the motor in one orientation according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the motor structure omitting the impeller according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the motor structure described in this embodiment of the invention, omitting the impeller and front housing.

[0033] Figure 4 This is a top view of the motor described in this embodiment of the present invention, omitting the impeller, front housing, and rotor assembly;

[0034] Figure 5 This is a schematic diagram of the motor structure described in this embodiment of the present invention, omitting the impeller, front housing, rotor assembly, and stator assembly.

[0035] Figure 6 This is a structural schematic diagram of the motor in another orientation according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the motor without the rear cover according to an embodiment of the present utility model;

[0037] Figure 8 This is a schematic diagram of the structure of the motor without the rear cover and controller described in this embodiment of the utility model;

[0038] Figure 9 This is a schematic diagram of the stator assembly described in an embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the structure of the matching stator core and terminals in one orientation according to an embodiment of the present invention;

[0040] Figure 11 This is a schematic diagram of another orientation of the cooperating stator core and terminals described in this embodiment of the utility model;

[0041] Figure 12 This is a schematic diagram of the winding principle of the stator assembly described in this embodiment of the present invention;

[0042] Figure 13 This is a schematic diagram of the stator winding on the stator core according to an embodiment of the present invention;

[0043] Figure 14 This is a schematic diagram of the structure of the elastic pad described in an embodiment of the present invention;

[0044] Figure 15 This is a cross-sectional view of the elastic pad described in an embodiment of the present invention;

[0045] Figure 16 This is a schematic diagram of the rotor assembly described in an embodiment of the present invention;

[0046] Figure 17 This is a schematic diagram of the front shell structure according to an embodiment of the present invention;

[0047] Figure 18 This is a schematic diagram of the structure of the rear shell according to an embodiment of the present utility model;

[0048] Figure 19 This is a schematic diagram of the structure of the cooperating controller, wiring terminal and connection terminal in one orientation according to an embodiment of the present utility model;

[0049] Figure 20 This is a schematic diagram of the structure of the controller, wiring terminal and connection terminal in another orientation as described in an embodiment of this utility model;

[0050] Figure 21 This is a schematic diagram of the heat sink in one orientation according to an embodiment of the present invention;

[0051] Figure 22 This is a schematic diagram of the heat sink in another orientation according to an embodiment of the present invention;

[0052] Figure 23 This is a schematic diagram of the cage structure according to an embodiment of the present invention;

[0053] Figure 24 This is a schematic diagram of the impeller structure according to an embodiment of the present invention.

[0054] In the picture:

[0055] 1. Stator assembly;

[0056] 11. Stator core; 100. Wiring slot; 101. First winding tooth; 102. Second winding tooth; 103. Third winding tooth; 104. Fourth winding tooth; 105. Fifth winding tooth; 106. Sixth winding tooth; 107. Seventh winding tooth; 108. Eighth winding tooth; 109. Ninth winding tooth; 110. Tenth winding tooth; 111. Eleventh winding tooth; 112. Twelfth winding tooth; 201. First wire stop block; 202. Second wire stop block; 203. Third wire stop block; 301. First winding block; 302. Second winding block;

[0057] 12. Stator winding;

[0058] 13. U-phase terminal block;

[0059] 14. V-phase terminal block;

[0060] 15. W-phase terminal block;

[0061] 16. Elastic pad; 161. Ring protrusion; 162. Inlet section; 163. Annular groove; 164. Barrier platform; 165. Ring sleeve;

[0062] 2. Rotor assembly;

[0063] 21. Support shell; 211. Air outlet;

[0064] 22. Magnet;

[0065] 23. Rotor shaft;

[0066] 3. Shell;

[0067] 31. Front casing; 311. Air inlet; 312. Air guide plate;

[0068] 32. Rear shell; 321. First guide rib; 322. Second guide rib;

[0069] 33. Back cover;

[0070] 34. Intermediate ring;

[0071] 4. Controller;

[0072] 41. Circuit board; 42. Protruding component;

[0073] 5. Terminal block;

[0074] 51. Connecting terminals;

[0075] 6. Heat sink;

[0076] 61. Convex hull;

[0077] 62. Clearance groove;

[0078] 63. Settling trough;

[0079] 64. Connecting ribs;

[0080] 65. Reinforce the protruding column;

[0081] 66. Connecting block;

[0082] 67. Support platform; 671. Alignment groove;

[0083] 68. A raised section;

[0084] 7. Vibration damping components;

[0085] 8. Cage;

[0086] 81. Positioning pin; 82. Retaining hole;

[0087] 9. Impeller;

[0088] 91. Air guide vanes. Detailed Implementation

[0089] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0090] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0091] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0092] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0093] like Figures 1 to 24 As shown, this utility model provides a motor, including a stator assembly 1 and a housing 3. The stator assembly 1 has multiple winding slots spaced apart circumferentially. The housing 3 has a main body cavity and an air intake channel that are interconnected. An air inlet 311 is provided on the outer wall of the housing 3, and the air intake channel is connected to the outside through the air inlet 311. The stator assembly 1 is fixedly mounted in the main body cavity. Guide ribs are provided in the air intake channel, dividing the air intake channel into multiple air intake channels. The inlet of each air intake channel is connected to the air inlet 311, and the outlet is connected to the main body cavity. Each air intake channel corresponds to one winding slot. The projection of the outlet of the air intake channel along its air outlet direction at least partially covers its corresponding winding slot. Airflow entering from the air inlet 311 can be guided into the winding slot through the air intake channel.

[0094] In this invention, the housing 3 includes an interconnected main body cavity and an air-guiding channel. After the external airflow enters the air-guiding channel through the air inlet 311, it can enter the main body cavity under the guidance of the air-guiding channel and blow towards the stator assembly 1. On this basis, the guide ribs divide the air-guiding channel into multiple air-guiding channels. The multiple air-guiding channels correspond to multiple winding slots of the stator assembly 1. The projection of the outlet of the air-guiding channel along its air outlet direction at least partially covers its corresponding winding slot, so that the airflow entering from the air inlet 311 can flow smoothly into the winding slot through the guidance of the air-guiding channel. This increases the contact area between the airflow and the stator assembly 1, making the ventilation path smoother, the airflow area larger, enhancing the heat dissipation pressure, and improving the heat dissipation efficiency.

[0095] The motor of this utility model will be described in detail below:

[0096] The motor of this utility model includes a stator assembly 1, a rotor assembly 2, a housing 3, a controller 4, a terminal block 5, a heat sink 6, a vibration damper 7, a cage 8, and an impeller 9. The stator assembly 1, rotor assembly 2, controller 4, terminal block 5, heat sink 6, vibration damper 7, and cage 8 are disposed in the housing 3, and the impeller 9 is disposed on the outside of the housing 3.

[0097] Specifically, the stator assembly 1 includes a stator core 11, stator windings 12, U-phase terminals 13, V-phase terminals 14, W-phase terminals 15, and an elastic pad 16; the rotor assembly 2 includes a support shell 21, a magnet 22, and a rotor shaft 23; the housing 3 includes a front shell 31, a rear shell 32, a rear cover 33, and an intermediate ring 34; and the controller 4 includes a circuit board 41 and protruding elements 42.

[0098] More specifically, the stator assembly 1 includes a stator core 11 and stator windings 12. The stator core 11 is provided with winding teeth and wire-blocking blocks. Multiple winding teeth are arranged sequentially and spaced apart along the circumference of the stator core 11. A winding groove is formed between two adjacent winding teeth. The outer peripheral wall of the winding teeth is provided with a spiral wiring groove 100. In the radial direction of the stator core 11, the wire-blocking block is arranged on one side of the winding teeth. The winding tooth closest to the wire-blocking block is the adjacent winding tooth. The stator winding 12 is laid in the wiring groove 100 and is wound sequentially on multiple winding teeth to form a three-phase winding connected end to end. Each phase winding includes a starting part and a ending part. The starting part and ending part of each phase winding are arranged opposite each other in the radial direction of the stator core 11. The starting part and ending part of each phase winding and the adjacent winding are connected by a bridging wire. The bridging wire is wound along the circumference of the stator core 11 and is wound on the side of the wire-blocking block away from the adjacent winding tooth.

[0099] In this invention, by setting a spiral wiring groove 100 on the outer peripheral wall of the winding teeth, the stator winding 12 is wound on the winding teeth with a stable and reliable inter-turn spacing, making the resistance of the three-phase windings more uniform and the inductance more even, ensuring tight wiring and reducing inter-turn wear. On this basis, by setting a wire-blocking block, when the bridging wire passes by the adjacent winding teeth in the winding path, it is wound on the side of the wire-blocking block away from the adjacent winding teeth, ensuring the spacing between the bridging wire and the windings passed in the winding path. The wire-blocking block separates the parts where the wires may overlap locally, ensuring the performance of the motor.

[0100] Specifically, such as Figures 9-13 As shown, the stator core 11 is provided with twelve winding teeth. Two adjacent winding teeth form a pair. The stator winding 12 wound on a pair of winding teeth forms the starting or ending part of a phase winding. Two pairs of winding teeth arranged opposite each other along the radial direction of the stator core 11 form a group. The stator winding 12 wound on a group of winding teeth forms a phase winding.

[0101] More specifically, the stator assembly 1 also includes three-phase terminals, namely U-phase terminal 13, V-phase terminal 14, and W-phase terminal 15. The twelve winding teeth, along the circumference of the stator core 11, are respectively the first winding tooth 101, the second winding tooth 102, the third winding tooth 103, the fourth winding tooth 104, the fifth winding tooth 105, the sixth winding tooth 106, the seventh winding tooth 107, the eighth winding tooth 108, the ninth winding tooth 109, the tenth winding tooth 110, the eleventh winding tooth 111, and the twelfth winding tooth 112. Figure 12 As shown, the stator winding 12 is sequentially wound around the W-phase terminal 15, the first winding tooth 101, the second winding tooth 102, the seventh winding tooth 107, the eighth winding tooth 108, the U-phase terminal 13, the fourth winding tooth 104, the third winding tooth 103, the ninth winding tooth 109, the tenth winding tooth 110, the V-phase terminal 14, the eleventh winding tooth 111, the twelfth winding tooth 112, the fifth winding tooth 105, the sixth winding tooth 106, and the W-phase terminal 15. This arrangement allows the stator winding 12 to be wound in a triangular configuration, enabling the winding to be completed in one pass. The connections of the two-phase windings connected to the V-phase terminal 14 are led out from a single winding slot, simplifying the winding path.

[0102] More specifically, three wire-blocking blocks are provided: a first wire-blocking block 201, a second wire-blocking block 202, and a third wire-blocking block 203. In the circumferential direction of the stator core 11, the first wire-blocking block 201 is located between the second winding tooth 102 and the third winding tooth 103; the second wire-blocking block 202 is located between the sixth winding tooth 106 and the seventh winding tooth 107; and the third wire-blocking block 203 is located between the third winding tooth 103 and the fourth winding tooth 104. The third winding tooth 103 is adjacent to the first wire-blocking block 201 and the third wire-blocking block 203, and the sixth winding tooth 106 is adjacent to the second wire-blocking block 202. Therefore, the winding path of the stator winding 12 is: W-phase connection. Terminal 15, first winding tooth 101, second winding tooth 102, first wire stop block 201, second wire stop block 202, seventh winding tooth 107, eighth winding tooth 108, U-phase terminal 13, third wire stop block 203, fourth winding tooth 104, third winding tooth 103, ninth winding tooth 109, tenth winding tooth 110, V-phase terminal 14, eleventh winding tooth 111, twelfth winding tooth 112, third wire stop block 203, fifth winding tooth 105, sixth winding tooth 106, and W-phase terminal 15. This configuration allows the three wire stop blocks to isolate the bridging wires at three different locations, resulting in greater efficiency and reliability.

[0103] In other embodiments, the wire blocking blocks may be provided in other quantities as needed and placed in the required positions.

[0104] Specifically, a winding block is provided on the stator core 11. Along the axial direction of the stator core 11, the winding block is located between the winding teeth and the winding portion of the terminal block, and the bridging wire is wound on the side of the winding block away from the winding portion. This arrangement ensures that the bridging wire is reliably gathered on the winding teeth before it reaches the winding portion leading to the terminal block, thus guaranteeing the winding quality.

[0105] More specifically, there are two winding blocks: a first winding block 301 and a second winding block 302. In the circumferential direction of the stator core 11, the first winding block 301 is located between the eleventh winding tooth 111 and the twelfth winding tooth 112, and the second winding block 302 is located between the eighth winding tooth 108 and the ninth winding tooth 109. A bridging wire is wound on the first winding block 301 between the W-phase terminal 15 and the first winding tooth 101, and a bridging wire is wound on the second winding block 302 between the eighth winding tooth 108 and the U-phase terminal 13, thus... Figure 13As shown, the winding path of the stator winding 12 is as follows: W-phase terminal 15, first winding block 301, first winding tooth 101, second winding tooth 102, first wire stop block 201, second wire stop block 202, seventh winding tooth 107, eighth winding tooth 108, second winding block 302, U-phase terminal 13, third wire stop block 203, fourth winding tooth 104, third winding tooth 103, ninth winding tooth 109, tenth winding tooth 110, V-phase terminal 14, eleventh winding tooth 111, twelfth winding tooth 112, third wire stop block 203, fifth winding tooth 105, sixth winding tooth 106, and W-phase terminal 15. This arrangement allows the two winding blocks to target the two phase terminals respectively, resulting in greater efficiency and reliability.

[0106] In other embodiments, the winding blocks may be configured in other quantities as needed, and in the required settings.

[0107] Specifically, the stator winding 12 is wound in two layers on each winding tooth. On the winding tooth, the first layer of stator winding 12 is confined within the wiring groove 100, and the second layer of stator winding 12 is wound outside the first layer of stator winding 12, confined between two adjacent turns of the first layer of stator winding 12. This arrangement, while ensuring reliable positioning, makes the stator winding 12 on the winding teeth more concentrated.

[0108] More specifically, the stator core 11 includes an upper cover, a lower cover, and a core body, with the core body sandwiched between the upper and lower covers. The winding teeth, the wire blocking block, the wiring groove 100, and the winding block are all disposed on the upper and lower covers.

[0109] In this embodiment, the stator winding 12 has 15 turns on each winding tooth, with 8 turns in the first layer and 7 turns in the second layer. The outer diameter of the stator winding 12 is 1.147±0.013mm, and the width of the wiring slot 100 is 1.2±0.1mm, which enables tight wiring. The wiring slot 100 is designed with an angle according to the winding method to make the wiring more uniform and ensure that the resistance of the three-phase winding is more uniform and the inductance is more even.

[0110] In this embodiment, the winding path of the stator winding 12 is as follows: first, it is hooked onto the winding portion of the W-phase terminal 15, then wound around the first winding block 301, then wound 15 turns on the first winding tooth 101, then wound 15 turns on the second winding tooth 102, then wound sequentially on the first and second guide blocks 201 and 202, then wound 15 turns on the seventh winding tooth 107, then wound 15 turns on the eighth winding tooth 108, then wound around the second winding block 302, then wound around the winding portion of the U-phase terminal 13, then passed between the ninth and tenth winding teeth 109 to the opposite side of the stator core 11, then wound around the third guide block 203, then wound 15 turns on the fourth winding tooth 104, then wound 15 turns on the third winding tooth 103, then wound 15 turns on the ninth winding tooth 109, and so on. Then, it is wound 15 turns on the tenth winding tooth 110, and then hooked onto the winding part of the V phase terminal 14. After that, it is wound 15 turns on the eleventh winding tooth 111, then 15 turns on the twelfth winding tooth 112, then wound onto the third wire stop block 203, then 15 turns on the fifth winding tooth 105, then 15 turns on the sixth winding tooth 106, and finally hooked onto the winding part of the W phase terminal 15. Among them, the stator winding 12 is wound clockwise on the first winding tooth 101, the eighth winding tooth 108, the fourth winding tooth 104, the ninth winding tooth 109, the twelfth winding tooth 112 and the fifth winding tooth 105, and counterclockwise on the second winding tooth 102, the seventh winding tooth 107, the third winding tooth 103, the tenth winding tooth 110, the eleventh winding tooth 111 and the sixth winding tooth 106.

[0111] Specifically, such as Figure 14 and Figure 15 As shown, the stator assembly 1 also includes an elastic pad 16. The elastic pad 16 has three through holes, and the three-phase terminals are inserted one-to-one into the three through holes and abut against the inner peripheral wall of the through holes. The heat sink 6 has through holes. The stator assembly 1 is located on one side of the heat sink 6. The three-phase terminals pass through the through holes and extend into the other side of the heat sink 6. The elastic pad 16 is snapped into the through holes. By setting the elastic pad 16 to seal the through holes on the heat sink 6 and to cover and seal the three-phase terminals inserted through the through holes, the safety of the components on the side of the heat sink 6 away from the stator assembly 1 is ensured. Since the controller 4 is located on the side of the heat sink 6 away from the stator assembly 1, the sealing of the elastic pad 16 improves the protection level of the controller 4 and ensures the lifespan of the controller 4.

[0112] More specifically, the through hole is provided with multiple annular protrusions 161, which are arranged sequentially at intervals along the axial direction of the through hole. The annular protrusions 161 are sleeved on the terminal block and abut against the outer peripheral wall of the terminal block. The multiple annular protrusions 161 cooperate with each other, and the gap between two adjacent annular protrusions 161 provides space for deformation, making the seal of the elastic pad 16 on the three-phase terminal block more reliable.

[0113] More specifically, an inlet section 162 is provided at the end of the stator core 11 facing the stator assembly 1, and the cross-sectional area of ​​the inlet section 162 gradually decreases along the direction away from the stator assembly 1. The above arrangement facilitates the insertion of the wiring terminals into the through hole.

[0114] In this embodiment, the elastic pad 16 is made of rubber and can be elastically deformed. The insertion hole also includes a sealing section connected to the inlet section 162, and multiple annular protrusions 161 are protruding from the inner wall of the sealing section.

[0115] Specifically, the elastic pad 16 has an annular groove 163 on its outer periphery, and the heat sink 6 is fitted into the annular groove 163. The annular groove 163 limits and fixes the elastic pad 16 to the heat sink 6, making the seal of the elastic pad 16 on the heat sink 6 more reliable.

[0116] More specifically, the elastic pad 16 is provided with two isolation platforms 164 on the side facing the stator core 11 of the stator assembly 1, and an isolation platform 164 is provided between two adjacent phase terminals. The above arrangement avoids short circuits between the three phase terminals.

[0117] In this embodiment, the head of the barrier platform 164 is conical and extends into the part where the spacing between two adjacent phase terminals is the smallest.

[0118] More specifically, the elastic pad 16 is provided with three rings 165, which are connected to the three through holes one by one. The retainer 8 has a compression section at the end of the retaining hole 82 of the terminal block facing the heat sink 6. The cross-sectional area of ​​the compression section gradually decreases along the direction away from the heat sink 6. The three compression sections are fitted onto the outside of the three rings 165 one by one. The rings 165 elastically deform and abut against the terminal block. The above arrangement makes the alignment between the elastic pad 16 and the retainer 8 more accurate, and allows the rings 165 to seal and wrap around the terminal block.

[0119] Specifically, in Figures 1-8 Based on, refer to Figure 16 The motor also includes a rotor assembly 2, which includes a support shell 21 and a plurality of magnets 22 connected to the support shell 21. The support shell 21 is located at the outlet of the housing 3, and airflow entering from the air inlet 311 of the housing 3 can flow out of the housing 3 through the rotor assembly 2. The above arrangement allows the cooling airflow to be blown out from the rotor assembly 2.

[0120] More specifically, multiple magnets 22 are evenly distributed around the outer periphery of the stator assembly 1, and an air passage is formed between the inner circumferential surface of the rotor assembly 2 and the outer circumferential surface of the stator assembly 1. An air outlet 211 is provided on the support shell 21, and the airflow entering from the air inlet 311 can flow sequentially through the heat sink 6, the air passage, and the air outlet 211. The above arrangement ensures that the airflow can be smoothly blown out of the rotor assembly 2 after flowing through the heat sink 6.

[0121] More specifically, the rotor assembly 2 also includes a rotor shaft 23, which is rotatably connected to the housing 3 and / or the heat sink 6, and the rotor assembly 2 is fixedly connected to the rotor shaft 23. This configuration enables the rotor assembly 2 to rotate stably and reliably.

[0122] More specifically, the rotor shaft 23 is rotatably connected to the support platform 67 of the heat sink 6. This arrangement allows the rotor shaft 23 to rotate stably relative to the heat sink 6.

[0123] In this embodiment, the support shell 21 is upside down at the output port of the shell 3. Ten magnets 22 are provided, and the ten magnets 22 are evenly distributed on the inner peripheral wall of the support shell 21. The top of the support platform 67 is provided with a transfer groove, and at least two bearings are fixed in the transfer groove. The rotor shaft 23 is rotatably connected to the support platform 67 through the bearings.

[0124] Specifically, in Figures 1-8 Based on, refer to Figures 17-18 The motor also includes a housing 3, which contains a cavity. The outer wall of the housing 3 has an air inlet 311 and an outlet. The cavity is connected to the outside via the air inlet 311 and the outlet. The stator assembly 1 is fixedly disposed within the cavity, and the heat sink 6 is also fixedly mounted within the cavity. The controller 4 is installed on the side of the heat sink 6 facing away from the stator assembly 1. Airflow entering through the air inlet 311 can flow towards the side of the heat sink 6 facing away from the controller 4. This arrangement allows the cooling airflow to efficiently remove heat from the heat sink 6, ensuring the safe and reliable operation of the controller 4.

[0125] More specifically, the accommodating cavity includes an interconnected main body cavity and an air duct. The housing 3 includes an interconnected main body and side arms. The main body cavity is disposed in the main body, and the air duct is partially disposed in the side arms and partially disposed in the main body. The heat sink 6 is fixedly mounted in the main body cavity of the main body. One end of the air duct is connected to the air inlet 311, and the other end is connected to the main body cavity. The main body cavity is connected to the outside through an outlet. This arrangement allows the cooling airflow to change direction within the air duct after entering the air duct from the air inlet 311 of the side arms, blowing towards the heat sink 6 and carrying away the heat from the heat sink 6, thereby improving the temperature rise of the controller 4.

[0126] Specifically, the air intake channel is equipped with guide ribs, which divide the air intake channel into multiple air intake channels. The inlet of each air intake channel is connected to the air inlet 311, and the outlet is connected to the main body cavity. Each air intake channel corresponds to a winding groove, and the projection of the outlet of the air intake channel along its air outlet direction at least partially covers its corresponding winding groove. This arrangement allows the airflow entering from the air inlet 311 to flow smoothly into the winding groove through the guide of the air intake channels, resulting in a smoother ventilation path, a larger flow area, enhanced heat dissipation pressure, and improved heat dissipation efficiency.

[0127] More specifically, the guide ribs include at least two first guide ribs 321. The first guide ribs 321 and the air inlet 311 are located on opposite inner walls of the air intake channel, and an air intake channel is formed between two adjacent first guide ribs 321. By setting the first guide ribs 321, an air intake channel can be easily and conveniently formed, ensuring that the airflow flows towards the winding groove.

[0128] More specifically, the guide ribs include a second guide rib 322, which and the air inlet 311 are located on opposite inner walls of the air intake channel. One end of the second guide rib 322 is connected to the first guide rib 321, and an air intake channel is formed between the second guide rib 322 and the inner wall of the air intake channel. By setting the second guide rib 322, the inner wall of the air intake channel can be fully utilized to form an air intake channel, resulting in a simple structure and low cost.

[0129] In this embodiment, two first guide ribs 321 are provided, and a second guide rib 322 is connected to each of the two first guide ribs 321 on opposite sides. An airflow channel is formed between the two first guide ribs 321. Each second guide rib 322 cooperates with the inner wall of the airflow channel to form an airflow channel. The two first guide ribs 321 and the two second guide ribs 322 cooperate to form three airflow channels in the airflow channel. Figure 4 and Figure 18 The direction indicated by the middle arrow is the airflow direction in the three air intake channels. The three air intake channels correspond one-to-one with the three adjacent winding slots.

[0130] Specifically, an air guide plate 312 is also provided in the air intake channel. The air guide plate 312 and the air inlet 311 are located on the same inner wall of the air intake channel. The air guide plate 312 and the guide ribs are located on opposite inner walls of the air intake channel. The air guide plate 312 extends along the extension direction of its adjacent air intake channel and extends into the main cavity. By providing the air guide plate 312, the airflow can be guided into the main cavity more smoothly.

[0131] In this embodiment, a guide plate 312 is provided for each first guide rib 321 and a guide plate 312 is provided for each second guide rib 322. In the axial direction of the stator assembly 1, the guide plate 312 is positioned opposite to the first guide rib 321 or the second guide rib 322.

[0132] Specifically, the housing 3 includes a front housing 31 and a rear housing 32 that are assembled together. A portion of the front housing 31 and a portion of the rear housing 32 are assembled to form an air intake channel. An air inlet 311 and a guide plate 312 are disposed on the front housing 31, and guide ribs are disposed on the rear housing 32. The above configuration reduces the manufacturing cost of the housing 3.

[0133] More specifically, the housing 3 also includes a rear cover 33 and an intermediate ring 34. The rear cover 32 is connected to the rear cover 33 via the intermediate ring 34, which is fitted around the outer periphery of the heat sink 6. The heat sink 6 is fixed to the rear cover 33. The rear cover 33, the heat sink 6, and the intermediate ring 34 form an isolation cavity. The controller 4 is disposed in the isolation cavity, with the heat dissipation surface located on the side of the heat sink 6 away from the isolation cavity. Airflow entering from the air inlet 311 can flow towards the heat dissipation surface. This arrangement ensures that the controller 4 is safer within the housing 3.

[0134] In this embodiment, the intermediate ring 34 is made of rubber and has a vibration damping effect. A part of the front shell 31, a part of the rear shell 32, the rear cover 33 and the intermediate ring 34 are assembled to form the main body. The main body cavity is set in the main body. The front shell 31 and the rear shell 32 are assembled to form a side support arm. The air intake channel and the air inlet 311 are set in the side support arm. The air intake channel and the air inlet 311 are independently set on one side of the main body, making the air intake airflow safer. The air inlet 311 and the air guide plate 312 are set in the front shell 31. The first guide rib 321 or the second guide rib 322 is set in the rear shell 32.

[0135] Specifically, in Figures 1-8 Based on, refer to Figures 19-20 The motor also includes a controller 4, which is located in the main body cavity and mounted on the side of the heat sink 6 away from the stator assembly 1. The terminals of the stator assembly 1 pass through the controller 4 and are electrically connected to the controller 4. By setting the controller 4, the three-phase windings can be electrically controlled.

[0136] More specifically, the controller 4 includes a circuit board 41 and a protruding element 42 disposed on one side of the circuit board 41, the protruding element 42 including an inductor and a capacitor.

[0137] In this embodiment, the controller 4 is a conventional device in the art, and its specific structure and working principle are existing technologies, which will not be described in detail here. It adopts a double-sided control structure, which doubles the heat dissipation area, not only reducing the cost but also achieving the effect of strengthening heat dissipation. The protruding element 42 is set according to the requirements. In addition to the protruding element 42, the components on the circuit board 41 also include MOS integrated circuits, chips, sampling resistors, etc. The heat generated by the components is transferred to the heat sink through the thermal conductive mud. The side closer to the air inlet 311 is more likely to dissipate the heat through the airflow.

[0138] Specifically, the motor also includes a terminal block 5, which is located in the main body cavity. The connection terminals 51 of the terminal block 5 pass through the controller 4 and are electrically connected to the controller 4. The above arrangement allows the three-phase windings to be connected to an external power source more safely.

[0139] More specifically, the through hole on the controller 4 corresponding to the wiring terminal of the stator assembly 1 is the first through hole, and the through hole corresponding to the connection terminal 51 of the terminal block 5 is the second through hole. The first through hole and the second through hole have the same diameter. After the wiring terminal and the connection terminal 51 are installed on the controller 4, they are connected by welding. The first through hole and the second through hole have the same diameter, so that welding heads of the same size can be used at the welding joint, ensuring the efficiency and quality of welding.

[0140] In this embodiment, the first through hole and the second through hole are provided on the circuit board 41. The circuit board 41 is also provided with a pin hole corresponding to the pin on the terminal block 5. The terminal block 5 is positioned and installed on the circuit board 41 by the snap-fit ​​of the pin hole.

[0141] Specifically, in Figures 1-8 Based on, refer to Figures 21-22 The motor also includes a heat sink 6, which is located in the main body cavity. The two sides of the heat sink 6 are a heat dissipation surface and a mounting surface, respectively. The heat sink 6 has a clearance area. The clearance area forms a protrusion 61 on the heat dissipation surface and a clearance groove 62 on the mounting surface. The circuit board 41 is fixed to the mounting surface, and the protruding element 42 extends into the clearance groove 62. The protrusion 61 and the corresponding clearance groove 62 cooperate to ensure the uniform wall thickness of the heat sink 6. By setting the protrusion 61, the heat dissipation area of ​​the heat sink 6 is increased, and the structural strength of the heat sink 6 is improved, thereby reducing vibration and noise during motor operation. By setting the clearance groove 62 to accommodate the protruding element 42, the circuit board 41 can fit more closely to the heat sink 6, improving heat transfer efficiency.

[0142] Specifically, the heat sink 6 has a recessed area, which forms a recessed groove 63 on the heat dissipation surface and a protruding abutment surface on the mounting surface. A protrusion 61 is disposed in the recessed groove 63, and the circuit board 41 abuts against the abutment surface. The recessed groove 63 and the protrusion 61 cooperate to further increase the heat dissipation area of ​​the heat sink 6 and improve the structural strength of the heat sink 6. Furthermore, the protrusion 61 is disposed in the recessed groove 63, which reduces its protrusion height on the heat dissipation surface and avoids interference of the protrusion 61 with components on one side of the heat dissipation surface. The abutment surface of the circuit board 41 improves the heat transfer efficiency.

[0143] More specifically, the heat dissipation surface is provided with a connecting rib 64, one end of which is connected to the protrusion 61. This arrangement improves the structural strength of the protrusion 61.

[0144] More specifically, the heat dissipation surface is provided with reinforcing protrusions 65. The above-mentioned features improve the structural strength of the heat dissipation plate 6.

[0145] More specifically, a connecting block 66 is provided on the outer periphery of the heat sink 6, and the connecting block 66 is provided with a locking hole. The rear cover 33 is provided with a positioning pin, which passes through the locking hole. The above configuration allows the heat sink 6 to be positioned and connected to the rear cover 33.

[0146] In this embodiment, multiple connecting ribs 64 and reinforcing protrusions 65 are provided, and some reinforcing protrusions 65 protrude from the connecting ribs 64.

[0147] Specifically, a support platform 67 is provided on the heat dissipation surface, and the stator assembly 1 is ring-fixed to the support platform 67. The above configuration ensures the reliable installation of the stator assembly 1.

[0148] More specifically, the outer peripheral wall of the support platform 67 and the inner peripheral wall of the stator assembly 1 are each provided with an alignment groove 671 and an alignment buckle, respectively, which is engaged with the alignment groove 671. This arrangement makes the correspondence between the stator assembly 1 and the support platform 67 more precise.

[0149] In this embodiment, the outer peripheral wall of the support platform 67 is provided with three evenly distributed alignment grooves 671, and the inner peripheral wall of the iron core is provided with three evenly distributed alignment buckles, which are correspondingly fitted into the three alignment grooves 671.

[0150] In this embodiment, the heat sink 6 is also provided with a pin hole corresponding to the pin on the terminal block 5. By engaging the pin hole, the terminal block 5 is positioned and installed on the heat sink 6. After the cooling airflow enters the air duct from the air inlet 311 of the side support arm, it can change the airflow direction in the air duct and blow towards the heat dissipation surface of the heat sink 6, carrying away the heat from the heat sink 6, thereby improving the temperature rise of the controller 4.

[0151] Specifically, the motor also includes a vibration damper 7, which is located in the main body cavity and fixed to the housing 3. The heat sink 6 is clipped onto the vibration damper 7. The above arrangement ensures that the installation of the heat sink 6 in the housing 3 is safer and more reliable.

[0152] More specifically, both the vibration damper 7 and the heat sink 6 have a slot and a protrusion 68, respectively, which is engaged with the slot. This arrangement makes the connection between the heat sink 6 and the vibration damper 7 simpler and more reliable.

[0153] In this embodiment, the vibration damper 7 is made of rubber, and three vibration dampers 7 are provided. The three vibration dampers 7 are evenly distributed along the circumference of the heat sink 6 and extend radially along the heat sink 6. One end of the vibration damper 7 is fixed to the rear shell 32, and the other end is provided with a slot. The depth direction of the slot is parallel to the radial direction of the stator assembly 1. The heat sink 6 is engaged in the slot by the protrusion 68 on its outer peripheral wall. Along the circumference of the heat sink 6, a connecting block 66 is provided on both sides of each protrusion 68, and each connecting block 66 is equipped with a positioning pin.

[0154] Specifically, in Figures 1-8 Based on, refer to Figure 23 The motor also includes a cage 8, which is sandwiched between the controller 4 and the heat sink 6. The cage 8 is provided with a positioning post 81 and a retaining hole 82. The controller 4 is provided with a positioning hole, the positioning post 81 is inserted into the positioning hole, and the retaining hole 82 is sleeved on the terminal block. The above configuration makes the positioning between the terminal block and the controller 4 more accurate.

[0155] In this embodiment, the retaining hole 82 also includes a limiting section connected to the extrusion section, and the wiring terminal extends out from the limiting section and is electrically connected to the controller 4.

[0156] Specifically, in Figures 1-8 Based on, refer to Figure 24 The motor also includes an impeller 9, which is located outside the housing 3 and fixedly connected to the rotor assembly 2. This configuration allows the motor to drive the impeller 9 to rotate, thus generating wind power.

[0157] More specifically, the impeller 9 has a guide vane 91 on the side facing the housing 3. When the impeller 9 rotates, the guide vane 91 drives the airflow at the outlet 211 to flow out through the gap between the impeller 9 and the housing 3. This arrangement allows the impeller 9 to create a negative pressure at the outlet 211 through the guide vane 91 when it rotates, causing the air inside the motor to be drawn out more quickly, thereby improving the internal heat dissipation efficiency of the motor.

[0158] In this embodiment, the impeller 9 is fixedly connected to the rotor shaft 23, and the motor is a brushless motor for automotive cooling fans. The side of the impeller 9 away from the housing 3 is provided with air delivery blades. When the motor is running, air is delivered outward through the air delivery blades.

[0159] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electric motor, characterized in that, include: A stator assembly, wherein a plurality of winding slots are arranged circumferentially at intervals; The housing has an interconnected main cavity and an air intake channel. The outer wall of the housing has an air inlet, and the air intake channel is connected to the outside through the air inlet. The stator assembly is fixed in the main cavity. The air intake channel has guide ribs that divide the air intake channel into multiple air intake channels. The inlet of each air intake channel is connected to the air inlet, and the outlet is connected to the main cavity. Each air intake channel corresponds to a winding groove, and the projection of the outlet of each air intake channel along its air outlet direction at least partially covers its corresponding winding groove.

2. The motor according to claim 1, characterized in that, The guide ribs include at least two first guide ribs, and an airflow channel is formed between two adjacent first guide ribs.

3. The motor according to claim 2, characterized in that, The guide rib includes a second guide rib, one end of which is connected to the first guide rib, and an airflow channel is formed between the second guide rib and the inner wall of the airflow channel.

4. The motor according to claim 3, characterized in that, There are two first guide ribs, and each of the two first guide ribs is connected to a second guide rib on the opposite side.

5. The motor according to claim 1, characterized in that, The air intake channel is also provided with an air guide plate. The air guide plate and the air guide rib are located on the inner walls of opposite sides of the air intake channel. The air guide plate extends along the extension direction of the adjacent air intake channel and extends into the main cavity.

6. The motor according to claim 1, characterized in that, The housing includes a front shell and a rear shell that are assembled together. A portion of the front shell and a portion of the rear shell are assembled to form the air intake channel. The air inlet is located in the front shell, and the guide ribs are located in the rear shell.

7. The motor according to claim 1, characterized in that, The housing includes a main body and a side support arm connected to each other. The main body cavity is disposed in the main body. The air intake channel is partially disposed in the side support arm and partially disposed in the main body. The air inlet is disposed in the side support arm.

8. The motor according to any one of claims 1-7, characterized in that, It also includes a controller, which is disposed in the main body cavity, and the wiring terminals of the stator assembly pass through the controller and are electrically connected to the controller.

9. The motor according to claim 8, characterized in that, It also includes a terminal block, which is disposed in the main body cavity, and the connection terminals of the terminal block pass through the controller and are electrically connected to the controller.

10. The motor according to claim 9, characterized in that, The through hole on the controller corresponding to the wiring terminal is the first through hole, and the through hole corresponding to the connection terminal is the second through hole. The diameter of the first through hole and the second through hole are the same.

11. The motor according to claim 8, characterized in that, It also includes a heat sink, which is fixed in the main body cavity. The controller is installed on the side of the heat sink away from the stator assembly, and the airflow entering from the air inlet can flow to the side of the heat sink away from the controller.

12. The motor according to claim 11, characterized in that, The housing includes a rear shell, a rear cover, and an intermediate ring. The rear shell is connected to the rear cover via the intermediate ring. The intermediate ring is sleeved on the outer periphery of the heat sink. The rear cover, the heat sink, and the intermediate ring form an isolation cavity. The controller is disposed in the isolation cavity.

13. The motor according to claim 12, characterized in that, It also includes a vibration damping component, which is fixedly connected to the rear shell, and the heat sink is clipped onto the vibration damping component.

14. The motor according to claim 11, characterized in that, It also includes a retainer, which is clamped between the controller and the heat sink. The retainer is provided with a positioning post and a retaining hole. The controller is provided with a positioning hole. The positioning post is inserted into the positioning hole, and the retaining hole is sleeved on the terminal block.

15. The motor according to claim 11, characterized in that, It also includes a rotor assembly, which includes a support shell and a plurality of magnets connected to the support shell. The outer wall of the shell is provided with an outlet, and the main cavity is connected to the outside through the outlet. The support shell is disposed at the outlet, and the airflow entering from the air inlet can flow out of the shell through the support shell.

16. The motor according to claim 15, characterized in that, Multiple magnets are evenly distributed around the outer periphery of the stator assembly, and an air passage is formed between the inner peripheral surface of the rotor assembly and the outer peripheral surface of the stator assembly. An air outlet is provided on the support shell, and the airflow entering from the air inlet can flow sequentially through the heat sink, the air passage and the air outlet.

17. The motor according to claim 15, characterized in that, The rotor assembly further includes a rotor shaft, which is rotatably connected to the housing and / or heat sink, and the support housing is fixedly connected to the rotor shaft.

18. The motor according to claim 17, characterized in that, A support platform is provided on the heat sink, and the rotor shaft is rotatably connected to the support platform.

19. The motor according to claim 15, characterized in that, It also includes an impeller, which is located outside the housing and fixed to the rotor assembly.

20. The motor according to claim 19, characterized in that, The impeller has guide vanes on the side facing the housing. When the impeller rotates, the guide vanes can drive the airflow from the support shell to flow out through the gap between the impeller and the housing.

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