Rotor, motor, water pump and vehicle

Abstract

The utility model provides a rotor, a motor, a water pump and a vehicle. The rotor comprises a rotor iron core and magnetic steel elements, the rotor iron core is provided with a plurality of mounting grooves distributed along the circumferential direction of the rotor iron core, each mounting groove is correspondingly provided with one magnetic steel element, and at least part of each magnetic steel element is accommodated in the corresponding mounting groove; and each magnetic steel element is provided with a first chamfered surface and a second chamfered surface on two opposite sides in the circumferential direction of the rotor core. Wherein in any two adjacent magnetic steel elements, the first chamfered surface of one magnetic steel element is correspondingly attached to the second chamfered surface of the other magnetic steel element. The two adjacent magnetic steel elements are attached to each other to eliminate the magnetic gap, so that magnetic leakage of the rotor can be reduced or even avoided, the iron loss of the rotor is reduced, and the output efficiency of the motor and the output efficiency of the water pump comprising the motor are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a rotor, a motor, a water pump and a vehicle. Background Art

[0002] In the related art, a water pump mainly includes a housing, a motor, an impeller and other components, wherein the motor includes a stator and a rotor rotatably matched with the stator. However, in the motor of the existing water pump, due to the serious problem of magnetic leakage in the rotor, the output efficiency of the motor is low, which in turn causes the output power of the water pump to be insufficient and cannot meet the output demand of a large flow rate. Utility Model Content

[0003] The utility model provides a rotor, a motor, a water pump and a vehicle. The rotor can reduce or even avoid magnetic leakage, thereby reducing the iron loss of the rotor and effectively improving the output efficiency of the motor and the water pump including the motor.

[0004] In order to achieve the above objectives, in a first aspect, the utility model provides a rotor, comprising:

[0005] The rotor core is provided with a plurality of mounting grooves, wherein the plurality of mounting grooves are distributed along the circumference of the rotor core;

[0006] A magnetic steel element, wherein each of the mounting grooves corresponds to a magnetic steel element, at least a portion of each of the magnetic steel elements is received in the corresponding mounting groove, and each of the magnetic steel elements is provided with a first chamfered surface and a second chamfered surface on two opposite sides in the circumferential direction of the rotor core;

[0007] Among any two adjacent magnetic steel elements, the first chamfered surface of one of the magnetic steel elements corresponds to and fits with the second chamfered surface of the other magnetic steel element.

[0008] In one embodiment, an angle between a perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and a plane where the first chamfered surface is located is a first angle, an angle between a perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and a plane where the second chamfered surface is located is a second angle, angles of the first angle and the second angle are A and B respectively, and the number of the magnetic steel elements is N, where N is an even number greater than or equal to 4;

[0009] Among them, A, B, and N satisfy the relationship: (A+B)*N=360.

[0010] In one embodiment, the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the first chamfered surface is located is a first angle, and the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the second chamfered surface is located is a second angle, and the first angle and the second angle are the same.

[0011] In one embodiment, the number of the mounting slots and the number of the magnetic steel elements are both 4, the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the first chamfered surface is located is a first angle, and the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the second chamfered surface is located is a second angle, and the angles of the first angle and the second angle are both 45 degrees.

[0012] In one embodiment, both the first chamfered surface and the second chamfered surface extend in the axial direction of the rotor core, and the extension length of the first chamfered surface is equal to the extension length of the second chamfered surface.

[0013] In one embodiment, any two adjacent mounting grooves are connected at adjacent sides thereof, and each magnetic steel element is entirely received in the corresponding mounting groove;

[0014] Alternatively, the multiple mounting grooves are spaced apart along the circumference of the rotor core, a portion of each magnetic steel element is accommodated in the corresponding mounting groove, and another portion is located outside the mounting groove, and the first chamfered surface and the second chamfered surface are provided on the portion of the magnetic steel element located outside the mounting groove.

[0015] In one embodiment, each of the magnetic steel elements is entirely received in the corresponding mounting groove, and each of the mounting grooves includes a first groove portion and a second groove portion and a third groove portion located at opposite ends of the first groove portion, the first groove portion, the second groove portion and the third groove portion are connected to each other, and the second groove portion of one of any two adjacent mounting grooves is connected to the third groove portion of the other mounting groove;

[0016] Each of the magnetic steel elements comprises a first magnetic portion and a second magnetic portion and a third magnetic portion located at opposite ends of the first magnetic portion, the first chamfered surface is provided at one end of the second magnetic portion away from the first magnetic portion, and the second chamfered surface is provided at one end of the second magnetic portion away from the first magnetic portion;

[0017] Among them, the first magnet part is adapted to be installed in the first slot part of the corresponding mounting slot, the second magnet part is adapted to be installed in the second slot part of the corresponding mounting slot, and the third magnet part is adapted to be installed in the third slot part of the corresponding mounting slot, and the second magnet part and the third magnet part are symmetrical about the perpendicular midline of the first magnet part.

[0018] In one embodiment, the outer contour of the second magnet portion on the side away from the central axis of the rotor core is a first circular arc protruding toward the outside of the rotor core, and the outer contour of the third magnet portion on the side away from the central axis of the rotor core is a second circular arc protruding toward the outside of the rotor core, and the radius of the first circular arc is equal to the radius of the second circular arc.

[0019] In one embodiment, the magnetic steel element includes one or more permanent magnets, and the plurality of permanent magnets are distributed along the circumference of the rotor core.

[0020] In one embodiment, the rotor further comprises:

[0021] A rotating shaft is inserted into the rotor core;

[0022] A sealing sleeve covers the rotor core and the magnetic steel element.

[0023] In a second aspect, the utility model provides a motor, comprising a stator and a rotor as described in any of the above embodiments, wherein the stator is sleeved on the outer side of the rotor.

[0024] In a third aspect, the utility model provides a water pump, comprising a housing, an impeller and the motor as described above;

[0025] The shell is provided with a water pump cavity, a motor cavity, and an inlet and an outlet connected to the water pump cavity. The motor is arranged in the motor cavity. The impeller is arranged in the water pump cavity and is transmission-connected to the rotating shaft of the rotor.

[0026] In a fourth aspect, the utility model provides a vehicle, comprising a vehicle body and the water pump as described above, wherein the water pump is installed in the vehicle body.

[0027] In the rotor, motor, water pump and vehicle provided in the embodiments of the utility model, the rotor includes a rotor core and a magnetic steel element, the rotor core is provided with a plurality of mounting grooves distributed along the circumference of the rotor core, each mounting groove corresponds to the installation of a magnetic steel element, at least a portion of each magnetic steel element is accommodated in the corresponding mounting groove, and each magnetic steel element is provided with a first chamfered surface and a second chamfered surface on opposite sides of the circumference of the rotor core, and the first chamfered surface of one of any two adjacent magnetic steel elements is correspondingly fitted with the second chamfered surface of the other magnetic steel element so that the adjacent magnetic steel elements are fitted with each other to eliminate the magnetic gap, thereby reducing or even avoiding magnetic leakage, thereby reducing the iron loss of the rotor, and effectively improving the output efficiency of the motor and the water pump including the motor.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the embodiments of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is an exploded view of a water pump according to an embodiment of the utility model.

[0031] Figure 2 It is a cross-sectional view of a water pump according to an embodiment of the utility model.

[0032] Figure 3 It is a schematic structural diagram of the waterproof housing of the water pump according to different viewing angles of the embodiment of the utility model.

[0033] Figure 4 It is a schematic structural diagram of a stator inner core and a stator outer core of a water pump according to an embodiment of the utility model.

[0034] Figure 5A It is a schematic structural diagram of a rotor of a water pump according to an embodiment of the utility model.

[0035] Figure 5B It is a schematic diagram of the internal structure of the rotor of the water pump according to an embodiment of the utility model.

[0036] Figure 6 It is a top view of the rotor of the water pump without the sealing sleeve according to the embodiment of the utility model.

[0037] Figure 7 It is a schematic structural diagram of a motor housing of a water pump according to an embodiment of the utility model.

[0038] Figure 8 It is a cross-sectional view of a volute of a water pump according to an embodiment of the utility model.

[0039] Fig. 9 It is a schematic structural diagram of a sealing end cover and a motor housing of a water pump according to an embodiment of the utility model.

[0040] Fig.10 It is a schematic structural diagram of an elastic retaining ring of a water pump according to an embodiment of the utility model.

[0041] Fig.11 It is a schematic structural diagram of a stator of a water pump according to an embodiment of the utility model.

[0042] Fig.12 It is a schematic structural diagram of a volute of a water pump according to an embodiment of the utility model.

[0043] Description of main reference numerals:

[0044] 1. Water pump; 100. Housing; 200. Stator; 300. Rotor; 400. Impeller; 500. Controller; 10. Waterproof housing; 11. Circulation hole; 12. Waterproof sealing ring; 13. Undercut; 14. Stator outlet hole; 15. Angle positioning protrusion; 20. Angle positioning groove; 101. Limiting protrusion; 102. Ring edge; 110. Pump water cavity; 120. Motor cavity; 121. First bearing; 122. Second bearing; 130. Inlet; 140. Outlet; 150. Electric control cavity; 160. Motor housing; 161. Mounting protrusion; 162. Electric control sealing ring; 163. Glue groove; 170. Volute; 171. Card slot; 172. Elastic retaining ring; 173. Volute sealing ring; 174. Disassembly hole; 175. Limiting notch; 180. Motor end cover; 190 , sealing cover; 191, flange; 201, yoke; 202, tooth; 203, tooth shoulder; 204, assembly groove; 205, notch; 206, through hole; 208, limit groove; 209, buckle groove; 211, stator inner core; 212, stator outer core; 220, winding; 310, rotor core; 311, magnetic isolation bridge; 312, installation groove; 3121, first groove; 3122, second groove portion; 3123, third groove portion; 320, rotating shaft; 330, magnetic steel element; 331, first magnet portion; 332, second magnet portion; 3321, first chamfered surface; 333, third magnet portion; 3331, second chamfered surface; 340, sealing sleeve; 321, adjusting ring; 322, thrust block; 510, connector; A, first angle; B, second angle. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0046] Please also read Figure 1 and Figure 2 The embodiment of the utility model provides a water pump 1, comprising a housing 100 and a motor and an impeller 400 mounted on the housing 100. The motor comprises a stator 200 and a rotor 300.

[0047] Specifically, Figure 1 and Figure 2 As shown, in the embodiment of the utility model, a pump water chamber 110 and a motor chamber 120 are defined in the housing 100, and the housing 100 is provided with an inlet 130 and an outlet 140 communicated with the pump water chamber 110. The stator 200 is arranged in the motor chamber 120, and the stator 200 includes a stator inner core 211, a stator outer core 212 and a winding 220, the winding 220 is wound around the stator inner core 211, and the stator outer core 212 is assembled on the outer side of the stator inner core 211. The rotor 300 is arranged in the motor chamber 120 and rotatably matched with the stator 200, and the stator 200 is sleeved on the outer side of the rotor 300. The impeller 400 is arranged in the pump water chamber 110 and is drivingly connected with the rotating shaft 320 of the rotor 300.

[0048] For example, Figure 1 As shown, the housing 100 can be in the shape of a rotating body, the inlet 130 and the outlet 140 are arranged at the same end of the housing 100, and the impeller 400 is located between the inlet 130 and the outlet 140. The impeller 400 rotates under the drive of the rotor 300 to draw water or other fluids out from the inlet 130 and send them out from the outlet 140.

[0049] According to the water pump 1 provided by the embodiment of the utility model, the stator core is set as the stator inner core 211 and the stator outer core 212, and the two are set separately, so that the winding 220 can be wound on the stator inner core 211 first. Since the stator outer core 212 is installed outside at this time, the winding space of the winding 220 is large, which can meet the winding of the large diameter winding 220. After the winding 220 is wound, the stator outer core 212 is assembled to form a complete stator core. In this way, the motor using the stator core has a greater output power, thereby effectively improving the driving force of the impeller 400 and improving the pumping capacity. Therefore, the water pump 1 according to the embodiment of the utility model has the advantages of high power and large output flow.

[0050] like FIG. 5A to FIG. 6As shown, in the embodiment of the present invention, the rotor 300 includes a rotor core 310 having a plurality of mounting slots 312, and a plurality of magnetic steel elements 330 mounted in the plurality of mounting slots 312 in a one-to-one correspondence. Figure 5A and Figure 6 As shown, a plurality of mounting grooves 312 are distributed along the circumference of the rotor core 310; each magnetic steel element 330 is provided with a first chamfered surface 3321 and a second chamfered surface 3331 on two opposite sides of the circumference of the rotor core 310. Figure 6 As shown, in the embodiment of the present invention, at least a portion of each magnetic steel element 330 is accommodated in the corresponding mounting groove 312, so as to be distributed along the circumference of the rotor core 310. It should be emphasized that, among any two adjacent magnetic steel elements 330, the first chamfered surface 3321 of one magnetic steel element 330 is correspondingly fitted with the second chamfered surface 3331 of the other magnetic steel element 330, so that the adjacent magnetic steel elements 330 can fit each other to eliminate the magnetic gap, so that the rotor 300 can reduce or even avoid magnetic leakage, reduce the iron loss of the rotor 300, and effectively improve the output efficiency of the motor including the rotor 300 and the water pump 1 including the motor.

[0051] In the embodiments of the present invention, the magnetic steel element 330 may be composed of one or more permanent magnets. When the magnetic steel element 330 is composed of multiple permanent magnets, the multiple permanent magnets are arranged to be distributed along the circumference of the rotor core 310. The permanent magnet may be an existing permanent magnet such as a neodymium iron boron permanent magnet or a ferrite permanent magnet, and this is not limited. In some specific embodiments of the present invention, for example FIG. 5A to FIG. 6 As shown, the magnetic steel element 330 is preferably composed of a permanent magnet, which is convenient for installation and low in cost.

[0052] In some specific embodiments of the present invention, FIG. 5A to FIG. 6 As shown, the adjacent sides of any two adjacent mounting slots 312 are connected, and each magnetic steel element 330 is entirely accommodated in the corresponding mounting slot 312. By improving the structure of the plurality of mounting slots 312, the adjacent sides of two of the plurality of mounting slots 312 are correspondingly connected, so that each magnetic steel element 330 is entirely accommodated in the corresponding mounting slot 312, which can not only ensure that the two adjacent magnetic steel elements 330 can fit each other to eliminate the gap, but also improve the convenience and structural stability of the magnetic steel element 330 installed on the rotor core 310.

[0053] Of course, in other embodiments of the present invention, the plurality of mounting slots 312 may also be configured to be distributed at intervals along the circumference of the rotor core 310, that is, the mounting slots 312 adjacent to each other are not connected to each other, a portion of each magnetic steel element 330 is accommodated in the corresponding mounting slot 312, and the other portion is located outside the mounting slot 312, and the first chamfered surface 3321 and the second chamfered surface 3331 are both provided at the portion of the magnetic steel element 330 located outside the mounting slot 312. By providing the chamfered surface at the exposed portion of the magnetic steel element 330, the purpose of two adjacent magnetic steel elements 330 fitting each other to eliminate the gap can also be achieved.

[0054] Furthermore, in some specific embodiments of the present invention, Figure 5A and Figure 6 As shown, each mounting groove 312 includes a first groove portion 3121, and a second groove portion 3122 and a third groove portion 3123 located at opposite ends of the first groove portion 3121. The first groove portion 3121, the second groove portion 3122 and the third groove portion 3123 are connected to each other, and the second groove portion 3122 of one mounting groove 312 of any two adjacent mounting grooves 312 is connected to the third groove portion 3123 of the other mounting groove 312. Each magnetic steel element 330 includes a first magnet portion 331, and a second magnet portion 332 and a third magnet portion 333 located at opposite ends of the first magnet portion 331. The end of the second magnet portion 332 away from the first magnet portion 331 is provided with a first chamfered surface 3321, and the end of the third magnet portion 333 away from the first magnet portion 331 is provided with a second chamfered surface 3331. As shown Figure 6 As shown, the first magnet portion 331 is adapted to be installed in the first slot portion 3121 of the corresponding mounting slot 312, the second magnet portion 332 is adapted to be installed in the second slot portion 3122 of the corresponding mounting slot 312, and the third magnet portion 333 is adapted to be installed in the third slot portion 3123 of the corresponding mounting slot 312. In any two adjacent magnetic steel elements 330, the first chamfered surface 3321 of the second magnet portion 332 of one magnetic steel element 330 corresponds to the second chamfered surface 3331 of the third magnet portion 333 of the other magnetic steel element 330. That is, in the water pump 1 according to the embodiment of the utility model, by improving the magnetic steel element 330 from the rectangular block structure commonly used in the prior art into a structure with chamfered surfaces on both sides, and connecting the corresponding mounting grooves 312, adjacent magnetic steel elements 330 can fit together to eliminate the magnetic gap, thereby reducing or even avoiding magnetic leakage, reducing the iron loss of the rotor 300, and effectively improving the output efficiency of the motor including the rotor 300 and the water pump 1 including the motor.

[0055] Optionally, in some specific embodiments of the present invention, Figure 6As shown, in each magnetic steel element 330, the outer contour of the side of the second magnetic part 332 away from the central axis of the rotor core 310 is a first arc protruding to the outside of the rotor core 310, and the outer contour of the side of the third magnetic part 333 away from the central axis of the rotor core 310 is a second arc protruding to the outside of the rotor core 310. The radius of the first arc and the radius of the second arc are preferably equal. In this way, in any two adjacent magnetic steel elements 330, the first arc of the second magnetic part 332 of one magnetic steel element 330 can smoothly transition with the second arc of the third magnetic part 333 of the other magnetic steel element 330 and form the same arc surface, which is in contact with the magnetic isolation bridge 311 of the rotor core 310 (see Figure 5A ) is adapted to the profile of the rotor 300, which helps to improve the structural stability of the rotor 300. Among them, the arc radii of the first arc, the second arc and the magnetic isolation bridge 311 can be set according to the actual size of the rotor 300, and there is no limitation on this.

[0056] Of course, in other embodiments, the outer contour of the second magnet portion 332 on the side away from the central axis of the rotor core 310 and the outer contour of the third magnet portion 333 on the side away from the central axis of the rotor core 310 may also be other structural designs, such as but not limited to a contour extending in a straight line along the extension direction of the first magnet portion 331, and there is no limitation on this.

[0057] In some specific embodiments of the present invention, Figure 6As shown, for each magnetic steel element 330, the angle between the perpendicular bisector of the first magnetic portion 331 (i.e., the perpendicular bisector of the magnetic steel element 330 along the radial direction of the rotor core 310) and the plane where the first chamfered surface 3321 is located is defined as the first angle, and the angle between the perpendicular bisector of the first magnetic portion 331 and the plane where the second chamfered surface 3331 is located is defined as the second angle, the angles of the first angle and the second angle are A and B respectively, the number of magnetic steel elements 330 is N, N is an even number greater than or equal to 4, and the relationship between A, B, and N is satisfied: (A+B)*N=360. For example, in some embodiments, when the value of N is 4, that is, the number of mounting slots 312 and magnetic steel elements 330 are both 2 pairs, and the sum of the first angle and the second angle is 90 degrees; in other embodiments, when the value of N is 6, that is, the number of mounting slots 312 and magnetic steel elements 330 are both 3 pairs, and the sum of the first angle and the second angle is 60 degrees; in still other embodiments, when the value of N is 8, that is, the number of mounting slots 312 and magnetic steel elements 330 are both 4 pairs, and the sum of the first angle and the second angle is 45 degrees. That is to say, in the water pump 1 according to the embodiment of the utility model, based on the principle of pairing the magnetic polarity of each magnetic steel element 330, when the rotor core 310 is provided with different numbers of pairs of mounting slots 312 and correspondingly installed with different numbers of pairs of magnetic steel elements 330, the sum of the first angle and the second angle between the first chamfered surface 3321 and the second chamfered surface 3331 of each magnetic steel element 330 and the perpendicular bisector of the magnetic steel element 330 are different, and the sum of the first angle and the second angle decreases as the number of mounting slots 312 increases.

[0058] Preferably, in some specific embodiments of the present invention, Figure 6 As shown, in each magnetic steel element 330, the second magnetic part 332 and the third magnetic part 333 are symmetrical about the perpendicular midline of the first magnetic part 331, and the angle of the first angle between the perpendicular midline of the first magnetic part 331 and the plane where the first chamfered surface 3321 is located is the same as the angle of the second angle between the perpendicular midline of the first magnetic part 331 and the plane where the second chamfered surface 3331 is located. By setting the second magnetic part 332 and the third magnetic part 333 to be symmetrical about the perpendicular midline of the first magnetic part 331, and setting the first angle and the second angle to be the same, the first chamfered surface 3321 and the second chamfered surface 3331 of each magnetic steel element 330 are symmetrically arranged about the perpendicular midline of the first magnetic part 331, so that the shapes of all magnetic steel elements 330 can be consistent, which is conducive to saving the types of tools for manufacturing the magnetic steel elements 330 and reducing costs.

[0059] More preferably, in some specific embodiments of the present invention, Figure 6As shown, the number of the mounting slots 312 and the number of the magnetic steel elements 330 are both 4, and the angles of the first angle and the second angle are both 45 degrees. In this embodiment, the number of the mounting slots 312 and the number of the magnetic steel elements 330 are both the minimum number required to meet the normal operation of the rotor 300, which is conducive to further reducing costs.

[0060] Further preferably, in some specific embodiments of the present invention, the first chamfered surface 3321 and the second chamfered surface 3331 of each magnetic steel element 330 extend along the axial direction of the rotor core 310, and the extension length of the first chamfered surface 3321 is equal to the extension length of the second chamfered surface 3331. In this way, when any two adjacent magnetic steel elements 330 are fitted together, the first chamfered surface 3321 of one magnetic steel element 330 and the second chamfered surface 3331 of the other magnetic steel element 330 can be completely fitted, which is beneficial to further reduce or even completely avoid magnetic leakage, thereby minimizing the iron loss of the rotor 300 and improving the output efficiency of the motor and the water pump 1.

[0061] Of course, in other embodiments, the extension length of the first chamfered surface 3321 of each magnetic steel element 330 may not be equal to the extension length of the second chamfered surface 3331. When any two adjacent magnetic steel elements 330 are bonded to each other, the first chamfered surface 3321 of one magnetic steel element 330 is at least partially bonded to the second chamfered surface 3331 of the other magnetic steel element 330. This is not limited to this.

[0062] In some specific embodiments of the present invention, Figure 4 As shown, the stator outer core 212 is interference fit with the stator inner core 211. The stator outer core 212 and the stator inner core 211 are more stably connected and will not move relative to each other, which is more conducive to the stable operation of the stator 200. At the same time, the volume of the stator 200 is reduced, ensuring that the water pump 1 is miniaturized while being able to output a high power of 400W.

[0063] In some specific embodiments of the present invention, the wire diameter of the winding 220 is 1.5mm to 2.12mm, that is, the diameter of the enameled wire of the winding 220 is 1.5mm to 2.12mm. A winding 220 with a larger diameter is selected to meet the requirement that the winding 220 can pass a larger current under high power output, thereby outputting a greater power. For example, the winding 220 in the embodiment of the present invention can be applied to a 12V system, and can output a maximum power of 300W to 400W. By adopting a winding 220 with a diameter of 1.5mm to 2.12mm, the output power of the water pump 1 is increased. In some specific embodiments of the present invention, such as Figure 4 As shown, the stator inner core 211 includes a yoke 201 , a plurality of tooth portions 202 and a plurality of tooth shoulders 203 .

[0064] The cross section of the yoke 201 is annular. A plurality of teeth 202 are connected to the outer peripheral surface of the yoke 201 and are arranged at equal intervals along the circumference of the yoke 201. A plurality of tooth shoulders 203 are connected to the ends of the plurality of teeth 202 away from the yoke 201 in a one-to-one correspondence. Among them, the winding 220 is wound around the plurality of teeth 202. As a result, the stator inner core 211 can be wound with more windings 220, and thus can output higher power. By winding the winding 220 around the teeth 202, the plurality of teeth 202 are arranged corresponding to the plurality of tooth shoulders 203. The yoke 201 and the tooth shoulders 203 stoppers provide positioning for the winding 220, so that the winding 220 will not separate from the stator inner core 211.

[0065] Furthermore, the cross section of the stator outer core 212 is annular, such as Figure 4 As shown, the stator outer core 212 surrounds the outer side of a plurality of tooth shoulders 203, and the inner circumferential surface of the stator outer core 212 is provided with a plurality of assembly slots 204 arranged at equal intervals along the circumference thereof, and the plurality of tooth shoulders 203 are matched with the plurality of assembly slots 204 one by one. The stator inner core 211 can be assembled inside the stator outer core 212, and the corresponding arrangement of the tooth shoulders 203 and the assembly slots 204 prevents the stator inner core 211 and the stator outer core 212 from rotating relative to each other, thereby improving the assembly stability of the stator 200. In addition, the stator inner core 211 and the rotor inner core are detachable, which is convenient for winding the winding 220. In addition, when assembling the stator outer core 212, the adjacent teeth 202 of the stator inner core 211 pass through the gaps between the tooth shoulders 203 to form a relatively open structure, so as to facilitate winding the winding 220 with a larger diameter. After the winding 220 is wound, the stator outer core 212 closes the relatively open structure to a certain extent to ensure the stability of the winding 220 .

[0066] In some specific embodiments of the present invention, Figure 4 As shown, the outer peripheral surface of the yoke 201 is provided with a plurality of notches 205, each of which extends along the axial direction of the yoke 201 and is located between two adjacent teeth 202. In each notch 205, a plurality of through holes 206 are arranged at intervals along the axial direction of the yoke 201, and each through hole 206 penetrates the yoke 201 along the thickness direction of the yoke 201. In this way, the performance and efficiency of the motor are guaranteed, and the structural strength is guaranteed when the manufacturing process is feasible. In particular, the width of the notch 205 is less than 0.6 mm.

[0067] In some specific embodiments of the present invention, Figure 4As shown, the stator inner core 211 is formed by stacking and plastic-coating a plurality of punching sheets, and some of the punching sheets are disconnected in the circumferential direction of the stator inner core 211 to form a through hole 206. Specifically, the stator inner core 211 includes two types of punching sheets, one is an integral ring, and the other is disconnected in the circumferential direction. The two types of punching sheets are alternately arranged, and the disconnected punching sheets form the through hole 206. After that, a plurality of punching sheets are riveted together, and finally plastic-coated by injection molding. On the one hand, it can be used as an insulating coating layer of the winding 220, and on the other hand, it increases the mechanical strength and ensures that no deformation occurs. For example, the stator inner core 211 may include 6 punching sheets, and each through hole 206 is formed by 5 disconnected punching sheets. The outer diameter of the stator 200 can be 78 mm, the inner diameter can be 39 mm, and the axial height can be 30.5 mm. The motor has an output power of 400 W.

[0068] In some specific embodiments of the present invention, Figure 5A and Figure 5B As shown, the rotor 300 includes a rotor core 310, a rotating shaft 320, a plurality of magnetic steel elements 330 and a sealing sleeve 340. The rotating shaft 320 is disposed through the rotor core 310 and is in transmission connection with the impeller 400. The plurality of magnetic steel elements 330 are disposed on the rotor core 310 and arranged along the circumference of the rotor core 310.

[0069] Specifically, the outer diameter of the rotor core 310 can be 35.4 mm, and the axial height can be 30.5 mm. The rotor core 310 and the magnetic steel element 330 can be fitted by interference fit to ensure that the magnetic steel element 330 will not be separated from the rotor core 310 due to the rotation of the rotor 300. There can be four magnetic steel elements 330 and they are evenly arranged in the circumferential direction of the rotor core 310. The sealing sleeve 340 covers the rotor core 310 and the magnetic steel element 330. The sealing sleeve 340 can be made of stainless steel, and is welded on the outer periphery of the rotor core 310 by laser welding to seal the rotor core 310 and the magnetic steel element 330 to prevent the medium from entering the rotor core 310 and the magnetic steel element 330, protect the rotor core 310 and the magnetic steel element 330 from rust, and ensure that the magnetic properties of the rotor 300 meet the requirements.

[0070] For ease of assembly, the sealing sleeve 340 is a split structure, for example, including a portion covering the rotor core 310 along the circumferential direction and portions covering both end surfaces of the rotor core 310 .

[0071] Furthermore, if Figure 5AAs shown, the outer peripheral surface of the rotor core 310 is constructed with a plurality of magnetic isolation bridges 311, each of which extends along the axial direction of the rotor core 310 and corresponds to a partial position between two adjacent magnetic steel elements 330, and the outer contour of the cross section of the magnetic isolation bridge 311 is an arc shape protruding toward the outside of the rotor core 310. For example, the outer contour of the cross section of the magnetic isolation bridge 311 is a 1 / 4 semicircular structure. Therefore, the width of the magnetic isolation bridge 311 has a smaller size while meeting the process production conditions, which can reduce the leakage magnetic field of the rotor 300 and improve the utilization rate of the magnetic steel element 330, thereby improving the magnetic properties of the rotor 300.

[0072] In some specific embodiments of the present invention, Figure 2 As shown, a first bearing chamber (not shown in the figure) and a second bearing chamber (not shown in the figure) are constructed in the motor cavity 120, a first bearing 121 is interference fit in the first bearing chamber, a second bearing 122 is interference fit in the second bearing chamber, a central axis of the first bearing 121 coincides with a central axis of the second bearing 122, and both ends of the rotating shaft 320 are supported on the housing 100 by the first bearing 121 and the second bearing 122 respectively.

[0073] The first bearing 121 and the second bearing 122 may be graphite bearings. The specific assembly process of the first bearing 121 and the second bearing 122 is as follows: the housing 100 is heated and baked, and the first bearing 121 and the second bearing 122 are assembled to the first bearing chamber and the second bearing chamber accordingly using the principle of thermal expansion and contraction. Through interference fit with the housing 100, the concentricity of the first bearing 121 and the second bearing 122 at both ends of the rotating shaft 320 is fully guaranteed, so that the rotor 300 is completely centered. The first bearing 121 and the second bearing 122 provide a smoother and more stable rotation for the rotating shaft 320.

[0074] Furthermore, if Figure 2As shown, the first bearing 121 is arranged adjacent to the impeller 400, and an adjusting ring 321 and a thrust block 322 are sleeved on one end of the rotating shaft 320 facing the impeller 400. The adjusting ring 321 and the thrust block 322 are stopped between the sealing sleeve 340 and the first bearing 121 along the axial direction of the rotating shaft 320, and the outer surface of the thrust block 322 is a smooth surface. For example, the thrust block 322 can be made of ceramic with a smooth surface, and is embedded and assembled in the adjusting ring 321, so that the friction is smaller. The thrust block 322 contacts the end surface of the first bearing 121. Since the thrust block 322 is a smooth ceramic plane, when the rotor 300 rotates, the friction between the thrust block 322 and the first bearing 121 will not generate noise. The adjusting ring 321 can be made of silicone rubber material, and is interference-fitted on the end surface of the rotor 300, and rotates with the rotor 300. Therefore, there is no gap between the rotor 300 , the adjustment ring 321 , the thrust block 322 and the first bearing 121 , thereby ensuring the rotation stability of the rotor 300 and preventing the rotor 300 from axial movement.

[0075] In some specific embodiments of the present invention, Figure 7 As shown, the water pump 1 further includes a controller 500 and a connector 510. An electric control chamber 150 is further defined in the housing 100, and the controller 500 is installed in the electric control chamber 150 to control the normal operation of the water pump 1. The connector 510 is electrically connected to the controller 500. For example, the connector 510 can be connected to the terminals of the controller 500 by resistance welding, which ensures good welding strength of the connector 510. The connector 510 is exposed from the housing 100, thereby facilitating external line connection.

[0076] Furthermore, if Figure 2 , Figure 8 and Fig. 9 As shown, the housing 100 includes a motor housing 160, a volute 170, a motor end cover 180 and a sealing cover 190. The volute 170 is installed at one end of the motor housing 160 and defines a pump water chamber 110 together with the motor housing 160, and the inlet 130 and the outlet 140 are arranged in the volute 170. The motor end cover 180 is arranged in the motor housing 160 and separates the motor chamber 120 and the electric control chamber 150 in the motor housing 160. Thus, different chambers are formed in the housing 100 to install corresponding functional components, avoid mutual interference between the components, and ensure that fluids such as water will not flow into the electric control chamber 150, avoid short circuit, and improve the safety of the water pump 1. The sealing cover 190 is installed at the other end of the motor housing 160 and covers the electric control chamber 150. The electric control chamber 150 has a space for accommodating and installing the controller 500, ensuring that the controller 500 is stably kept inside the electric control chamber 150, thereby maintaining a stable electrical connection.

[0077] Furthermore, if Figure 2 and Fig.10As shown, the inner circumference of the volute 170 is provided with a slot 171 extending along the circumference thereof, and an elastic circlip 172 is provided in the slot 171, and the volute 170 is installed on one end of the motor housing 160 through the elastic circlip 172. The slot 171 provides an installation space for the elastic circlip 172, and the elastic circlip 172 stops at one end of the motor housing 160 to achieve the installation of the motor housing 160 and the volute 170, and the circlip 172 is used for assembly and fixing. Compared with the prior art using bolt connection, the screw hole structure design of the motor housing 160 and the volute 170 is reduced, thereby also reducing the volume of the water pump 1, which is conducive to the installation of the water pump 1 in a small space. Among them, a volute sealing ring 173 is provided between the inner circumference of the volute 170 and the outer circumference of the motor housing 160 to strengthen the sealing between the motor housing 160 and the volute 170 to prevent leakage of fluids such as water.

[0078] In some specific embodiments of the present invention, Fig.10 As shown, both ends of the circlip 172 are respectively provided with disassembly holes 174. In this way, the volute 170 can be disassembled and assembled by clamping the circlip 172 with tools such as snap ring pliers, and disassembly is more convenient.

[0079] In some specific embodiments of the present invention, Figure 2 , Figure 7 and Fig.12 As shown, at least one limiting protrusion 101 is provided on the outer circumferential surface of the motor housing 160, and a limiting notch 175 is provided on the end surface of the volute 170 facing the motor housing 160, and the limiting protrusion 101 is matched with the limiting notch 175. Thus, by matching and assembling the limiting protrusion 101 and the limiting notch 175, the motor housing 160 and the volute 170 can be circumferentially limited to avoid relative rotation between the two.

[0080] In some specific embodiments of the present invention, Figure 2 and Fig. 9 As shown, the outer peripheral surface of the other end of the motor housing 160 is provided with a ring edge 102 extending along the circumferential direction thereof, and the outer peripheral edge of the sealing cover 190 is configured with a flange 191, and the flange 191 covers the ring edge 102. By assembling the flange 191 and the ring edge 102, the motor housing 160 and the sealing cover 190 can be assembled without setting screws, thereby reducing the spatial structural design of the screw holes of the components and reducing the volume of the water pump 1.

[0081] Furthermore, a sealant, such as sealing silica gel, is filled between the sealing cover 190 and the motor housing 160, so that the sealing cover 190 and the motor housing 160 are completely sealed to prevent external dust and liquid from entering and contacting the controller 500, thereby ensuring the safe and reliable operation of the entire water pump 1.

[0082] In some specific embodiments of the present invention, Figure 7As shown, the controller 500 is installed on the motor end cover 180 by means of threaded fasteners and / or thermal conductive adhesive, a mounting protrusion 161 is provided on the side wall of the motor housing 160, the connector 510 is installed on the surface of the mounting protrusion 161 facing away from the motor housing 160, and is electrically connected to the controller 500 through the mounting protrusion 161, and an electric control sealing ring 162 is provided between the connector 510 and the mounting protrusion 161.

[0083] For example, the motor end cover 180 and the motor housing 160 can be sealed by a sealing ring, the controller 500 can be installed on the motor end cover 180 by using threaded fasteners, and the controller 500 can be fixed to the motor end cover 180 by using thermal conductive glue, thereby ensuring a stable connection between the controller 500 and the motor end cover 180 and forming effective heat dissipation. The mounting protrusion 161 provides a mounting carrier for the plug-in connector 510, so that the controller 500 is electrically connected to the plug-in connector 510. It is also beneficial for operators to operate the plug-in connector 510, thereby improving the stability of the plug-in connector 510. The electric control sealing ring 162 ensures the seal between the plug-in connector 510 and the mounting protrusion 161, preventing external liquid from entering the electric control cavity 150.

[0084] In some specific embodiments of the present invention, the inner circumferential surface of the motor housing 160 is provided with a glue groove 163 extending along the circumferential direction thereof, and the glue groove 163 is filled with a fixing glue bonded to the stator outer core 212. The motor housing 160 is bonded and fixed to the stator outer core 212, which helps to securely fix the stator 200 and ensure that the stator 200 meets certain vibration resistance requirements.

[0085] In some specific embodiments of the present invention, Figure 2 As shown, the stator outer core 212 and the motor housing 160 are interference fit, so that the stator outer core 212 and the motor housing 160 do not rotate, and the axis is ensured to be the same. Among them, the outer peripheral surface of the stator outer core 212 is provided with at least one limit groove 208, and the limit groove 208 extends along the axis of the stator outer core 212. The stator 200 is circumferentially positioned with the motor housing 160 by the cooperation between the limit groove 208 and the protrusion on the tooling sleeve. For example, the stator 200 can be provided with two limit grooves 208. First, a tooling sleeve with a protrusion is installed on the motor housing 160, and then the stator 200 is set in the sleeve. The limit groove 208 corresponds to the protrusion. The stator 200 is installed to the motor housing 160 using the tooling sleeve, so that the installation direction of the stator 200 in the circumferential direction of the motor housing 160 is unique. The housing 100 is heated and baked, and the stator 200 is easily press-fitted through the thermal expansion and contraction of the housing 100. After the press-fitting is completed, the tooling sleeve can be pulled out.

[0086] In some specific embodiments of the present invention, Figure 2 and Figure 3As shown, the water pump 1 also includes a waterproof shell 10. The motor shell 160 is provided with at least one circulation hole 11, and the circulation hole 11 connects the pump water cavity 110 with the rotor 300 in the motor cavity 120. The waterproof shell 10 is arranged between the rotor 300 and the stator 200, and the two ends of the waterproof shell 10 are respectively sealed and connected with the motor shell 160 through a waterproof sealing ring 12. Specifically, the motor shell 160 can have three circulation holes 11, and the circulation holes 11 correspond to the positions of the rotor 300, so that the water or other fluid in the pump water cavity 110 can be driven by the impeller 400 to contact and exchange heat with the rotor 300, and the heat generated by the controller 500 can also be transferred to the water or other fluid at the rotor 300 through the motor end cover 180, and then the heat is transferred out through the continuous circulation of the water or other fluid, so that the water pump can be fully cooled. In addition, the waterproof shell 10 and the waterproof sealing ring 12 are sealed to prevent the water or other medium from contacting the stator 200.

[0087] Furthermore, if Figure 3 and Figure 4 As shown, the waterproof housing 10 is provided with an undercut 13, and the stator 200 is provided with a buckle groove 209. The buckle groove 209 can be provided on the plastic coating material of the stator 200. For example, the undercut 13 is provided at intervals along the circumference of the waterproof housing 10, and the buckle groove 209 is provided at intervals along the circumference of the stator 200. The multiple undercuts 13 are correspondingly engaged with the multiple buckle grooves 209. In this way, it is ensured that the waterproof housing 10 will not be bounced in the axial direction due to the elastic force of the waterproof sealing ring 12, thereby ensuring the sealing performance and installation reliability of the waterproof housing 10.

[0088] In some specific embodiments of the present invention, Figure 3 As shown, the waterproof housing 10 is provided with a stator outlet hole 14, and the cross-sectional area of ​​the stator outlet hole 14 gradually increases toward the stator 200. For example, there may be three stator outlet holes 14, corresponding to the lead-out of the three-phase wire harness, and the stator outlet hole 14 is configured as a large chamfered structure with a cross-sectional area gradually increasing toward the stator 200. In the case that the three-phase wire harness is not neat, the three-phase wire harness can be corrected so that the wire harness can pass through the stator outlet hole 14 more easily.

[0089] In some specific embodiments of the present invention, Figure 3 and Fig.11 As shown, the waterproof housing 10 is provided with an angle positioning protrusion 15, and the stator 200 is provided with an angle positioning groove 20, and the angle positioning protrusion 15 is matched with the angle positioning groove 20. In this way, the circumferential relative position of the waterproof housing 10 and the stator 200 is fixed, ensuring that the stator outlet hole 14 on the waterproof housing 10 corresponds to the appearance position of the three-phase line, so that the three-phase line and the controller 500 can be reliably assembled.

[0090] It is understandable that other structures and operations of the water pump 1 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0091] Furthermore, an embodiment of the utility model also provides a vehicle, comprising a vehicle body and a water pump installed in the vehicle body. The water pump can be the water pump 1 in any of the above embodiments, so it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0092] It should be noted that in the embodiments of the present utility model, the vehicle may be, but is not limited to, any vehicle equipped with a water pump, such as an electric vehicle, a fuel vehicle, a hybrid vehicle, etc., and no limitation is made to this.

[0093] In the description of the present invention, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0094] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor, characterized in that: include: The rotor core is provided with a plurality of mounting grooves, wherein the plurality of mounting grooves are distributed along the circumference of the rotor core; A magnetic steel element, wherein each of the mounting grooves corresponds to a magnetic steel element, at least a portion of each of the magnetic steel elements is received in the corresponding mounting groove, and each of the magnetic steel elements is provided with a first chamfered surface and a second chamfered surface on two opposite sides in the circumferential direction of the rotor core; Among any two adjacent magnetic steel elements, the first chamfered surface of one of the magnetic steel elements corresponds to and fits with the second chamfered surface of the other magnetic steel element.

2. The rotor according to claim 1, characterized in that The angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the first chamfered surface is located is a first angle, the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the second chamfered surface is located is a second angle, the angles of the first angle and the second angle are A and B respectively, the number of the magnetic steel elements is N, and N is an even number greater than or equal to 4; Among them, A, B, and N satisfy the relationship: (A+B)*N=360.

3. The rotor according to claim 1, characterized in that The angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the first chamfered surface is located is a first angle, and the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the second chamfered surface is located is a second angle, and the first angle and the second angle are the same.

4. The rotor according to claim 1, characterized in that The number of the mounting slots and the number of the magnetic steel elements are both 4, the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the first chamfered surface is located is a first angle, the angle between the perpendicular bisector of the magnetic steel element along the radial direction of the rotor core and the plane where the second chamfered surface is located is a second angle, and the angles of the first angle and the second angle are both 45 degrees.

5. The rotor according to claim 1, characterized in that The first chamfered surface and the second chamfered surface both extend in the axial direction of the rotor core, and an extension length of the first chamfered surface is equal to an extension length of the second chamfered surface.

6. The rotor according to claim 1, characterized in that Any two adjacent mounting grooves are connected at their adjacent sides, and each magnetic steel element is entirely accommodated in the corresponding mounting groove; Alternatively, the multiple mounting grooves are spaced apart along the circumference of the rotor core, a portion of each magnetic steel element is accommodated in the corresponding mounting groove, and another portion is located outside the mounting groove, and the first chamfered surface and the second chamfered surface are provided on the portion of the magnetic steel element located outside the mounting groove.

7. The rotor according to claim 6, characterized in that Each of the magnetic steel elements is entirely received in the corresponding mounting groove, and each of the mounting grooves includes a first groove portion and a second groove portion and a third groove portion located at opposite ends of the first groove portion, the first groove portion, the second groove portion and the third groove portion are connected to each other, and the second groove portion of one of any two adjacent mounting grooves is connected to the third groove portion of the other mounting groove; Each of the magnetic steel elements comprises a first magnetic portion and a second magnetic portion and a third magnetic portion located at opposite ends of the first magnetic portion, the first chamfered surface is provided at one end of the second magnetic portion away from the first magnetic portion, and the second chamfered surface is provided at one end of the second magnetic portion away from the first magnetic portion; Among them, the first magnet part is adapted to be installed in the first slot part of the corresponding mounting slot, the second magnet part is adapted to be installed in the second slot part of the corresponding mounting slot, and the third magnet part is adapted to be installed in the third slot part of the corresponding mounting slot, and the second magnet part and the third magnet part are symmetrical about the perpendicular midline of the first magnet part.

8. The rotor according to claim 7, characterized in that The outer contour of the second magnet portion on the side away from the central axis of the rotor core is a first arc protruding toward the outside of the rotor core, and the outer contour of the third magnet portion on the side away from the central axis of the rotor core is a second arc protruding toward the outside of the rotor core, and the radius of the first arc is equal to the radius of the second arc.

9. The rotor according to any one of claims 1 to 8, characterized in that The magnetic steel element includes one or more permanent magnets, and the plurality of permanent magnets are distributed along the circumference of the rotor core.

10. The rotor according to any one of claims 1 to 8, characterized in that Also includes: A rotating shaft is inserted into the rotor core; A sealing sleeve covers the rotor core and the magnetic steel element.

11. A motor, characterized in that: It comprises a stator and a rotor as claimed in any one of claims 1 to 10, wherein the stator is sleeved on the outer side of the rotor.

12. A water pump, characterized in that: comprising a housing, an impeller and the motor as claimed in claim 11; The shell is provided with a water pump cavity, a motor cavity, and an inlet and an outlet connected to the water pump cavity. The motor is arranged in the motor cavity. The impeller is arranged in the water pump cavity and is drivingly connected to the rotating shaft of the rotor.

13. A vehicle, characterized in that: It comprises a vehicle body and the water pump as claimed in claim 12, wherein the water pump is installed in the vehicle body.

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