Rotor and motor

Abstract

The utility model discloses a rotor, comprising a motor shaft; the plurality of rotor laminations are stacked along the axial direction and penetrate through the motor shaft, each rotor lamination is provided with a plurality of accommodating grooves, the plurality of accommodating grooves penetrate through the corresponding rotor laminations along the axial direction, and the plurality of accommodating grooves of the adjacent rotor laminations are in one-to-one correspondence along the axial direction; wherein each accommodating groove of each rotor lamination is internally provided with magnetic steel, the magnetic steel and the groove wall of the corresponding accommodating groove define an accommodating channel, all the accommodating channels are communicated in the axial direction to form an injection molding cavity, and the plurality of rotor laminations are connected by filling plastic in the injection molding cavity. According to the utility model, filling and fixing of the magnetic steel and axial connection of the rotor laminations can be realized at the same time with low production cost. The utility model also provides a motor.

Description

Technical Field

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

[0002] A permanent magnet synchronous motor is a motor that works based on the interaction between the constant magnetic field generated by the permanent magnet and the magnetic field generated by the alternating current in the coil. The rotor of a permanent magnet synchronous motor is equipped with magnets, which are usually divided into embedded magnets and surface-mounted magnets.

[0003] For the layout of embedded magnets, it is necessary to open a magnet slot on each rotor, fill the magnet into the corresponding magnet slot, and then bond and seal the inside of the magnet slot by gluing. Then, use ultraviolet light to irradiate each glued rotor for a long time to accelerate the curing of the glue. Subsequently, each rotor needs to be placed in a curing oven for additional heating to achieve thorough curing of the glue. This process is relatively complicated and increases time and production costs.

[0004] Furthermore, after the multi-piece rotor produced by the above method is inserted into the motor shaft in sequence, end covers need to be installed at both ends, and multiple long bolts (for example, four or eight) are used to pass through the end covers and the multi-piece rotor in the axial direction to achieve axial fixation of the multi-piece rotor between the two end covers. The manufacturing cost of the end cover and the multiple long bolts is high, and bolt holes need to be opened on the end cover and each rotor. This fixing method increases the manufacturing cost of the entire motor.

[0005] Furthermore, the rotor of the permanent magnet synchronous motor needs to meet the dynamic balance to achieve the normal operation of the motor. The weight removal method (i.e., drilling holes on the two end covers) is usually used for dynamic balance correction. In other words, the two end covers are not only used as a part of the rotor axial fixation, but also as a counterweight for dynamic balance correction. Therefore, there are high requirements for the design, size, and strength of the end covers. For example: during the design process, it is necessary to reserve appropriate bolt holes and dynamic balance holes; the size of the end cover needs to match the rotor; due to the need to open bolt holes and dynamic balance holes, the end cover needs to withstand a certain mechanical load to ensure high strength, etc. Utility Model Content

[0006] The utility model aims to solve the problem that the magnet steel filling and fixing process of the existing permanent magnet synchronous motor is complicated and the end cover for axial connection is expensive. The utility model provides a rotor that can realize the filling of magnet steel and the axial connection of rotor laminations at a lower production cost.

[0007] In order to solve the above technical problems, the embodiment of the utility model discloses a rotor, comprising:

[0008] Motor shaft;

[0009] A plurality of rotor laminations, wherein the plurality of rotor laminations are stacked along the axial direction of the motor shaft, each of the rotor laminations is provided with a plurality of receiving slots, and along the axial direction, the plurality of receiving slots penetrate the corresponding rotor laminations, and along the axial direction, the plurality of receiving slots of adjacent rotor laminations correspond to each other one by one; wherein,

[0010] A magnetic steel is provided in each of the receiving grooves of each of the rotor laminations. The magnetic steel and the groove wall of the corresponding receiving groove form a receiving channel. Along the axial direction, all the receiving channels are connected to form an injection cavity. The multiple rotor laminations are connected by filling plastic in the injection cavity.

[0011] In the existing scheme, it is necessary to glue the magnetic steel slots of each rotor lamination, cure it with UV lamp and high temperature after gluing, and then insert it into the motor shaft, add two end covers at both ends, and configure multiple long bolts to bolt the multiple rotor laminations and end covers. Therefore, the whole production process is complicated, and the time cost and production cost are high. For example, it is necessary to equip equipment such as light curing machine and curing furnace, and the cost of end covers and long bolts (with nuts) is also high.

[0012] By adopting the above technical solution, multiple receiving grooves for loading magnetic steel are opened on each rotor lamination, and the receiving grooves of multiple rotor laminations correspond to each other in the axial direction. When the magnetic steel is set in the receiving groove, it can form a receiving channel with the groove wall of the corresponding receiving groove. These receiving channels are interconnected in the axial direction to form multiple injection cavities. That is to say, for example, when the rotor laminations of the embodiment of the present application are assembled on the motor shaft, all the rotor laminations can be inserted into the motor shaft at the same time. At this time, the above multiple injection cavities are interconnected in the axial direction, and then the multiple injection cavities are injected at the same time. Then, the multiple injection cavities after injection can fix the multiple rotor laminations.

[0013] Based on this, for example, when the rotor of the embodiment of the present application is applied to a motor, the rotor does not need to use two end covers to fix the multiple rotor laminations, thereby reducing production costs and design difficulties; at the same time, when the rotor of the embodiment of the present application is loaded with magnetic steel, it only needs to be directly integrally injected to fix the magnetic steel in the corresponding receiving groove, without repeatedly performing gluing and curing operations on each rotor lamination, thereby effectively reducing time and production costs; in addition, the overall strength of the multiple rotor laminations in the embodiment of the present application is enhanced, and dynamic balancing holes can be directly punched on the rotor laminations at both ends without further adding counterweights (i.e., end covers), thereby simplifying the motor structure and reducing the design difficulty of the original end covers that still need to reserve holes.

[0014] According to another specific embodiment of the present utility model, the multiple accommodating slots include multiple first slot groups, each of the first slot groups includes multiple first accommodating slots, and along the circumferential direction of the rotor lamination, the multiple first slot groups are distributed at first spacing; each of the first accommodating slots is provided with the magnetic steel, and the slot wall of the first accommodating slot and the magnetic steel form a first accommodating channel; along the circumferential direction, the multiple first accommodating slots of each first slot group are arranged at second spacing, and are symmetrically arranged along the radial direction of the rotor lamination; the first spacing is greater than the second spacing.

[0015] By adopting the above technical solution, along the circumference of the rotor laminations, a first slot group including a plurality of first accommodating slots is evenly spaced at a first pitch, and a plurality of first accommodating slots in each first slot group are evenly spaced at a second pitch, so that the rotor laminations can generate a uniform magnetic field. For example, when the rotor is applied to a motor, the motor efficiency and stability can be improved.

[0016] According to another specific embodiment of the present utility model, the first accommodating channel includes a first channel and a second channel; the first accommodating groove includes a first part, a second part and a third part which are connected in sequence, the first part and the third part are arc-shaped, the second part is rectangular, the second part is provided with the magnetic steel, two of the surfaces of the magnetic steel are respectively fitted with the inner wall of the second part, and the other two surfaces of the magnetic steel are respectively spaced apart from the arc inner walls of the first part and the third part to respectively enclose the first channel and the second channel.

[0017] According to another specific embodiment of the utility model, the multiple accommodating grooves also include multiple second groove groups, each of the second groove groups includes multiple second accommodating grooves, and along the circumferential direction, the multiple second groove groups are distributed at intervals, and a portion of each of the second groove groups is located between adjacent first groove groups.

[0018] According to another specific embodiment of the utility model, the magnetic steel is provided in each of the second accommodating grooves, and the groove wall of the second accommodating groove and the magnetic steel form a second accommodating channel; along the circumferential direction, the multiple second accommodating grooves are arranged at intervals and symmetrically along the radial direction.

[0019] According to another specific embodiment of the present invention, each of the second slot groups includes two second accommodating slots, and the two second accommodating slots are in an eight-shaped shape.

[0020] By adopting the above technical solution, a plurality of second slot groups distributed at intervals are added to each rotor lamination, and a part of the second slot group is sandwiched between adjacent first slot groups. After the magnetic steel is filled in, the magnetic field strength of the rotor and the structural strength of the rotor lamination are effectively enhanced, the eddy current loss is reduced, and the noise, vibration and acoustic roughness are improved. For example, when the rotor is applied to a motor, the motor efficiency can be effectively improved.

[0021] According to another specific embodiment of the present utility model, the second accommodating channel includes a third channel and a fourth channel; the second accommodating groove includes a fourth part, a fifth part and a sixth part which are connected in sequence, the fourth part extends along the radial direction, the sixth part is arc-shaped, the fifth part is rectangular and extends along the first direction, the first direction intersects with the radial direction, and the fifth part is provided with the magnetic steel; two of the faces of the magnetic steel are respectively fitted with the inner wall of the fifth part, and the other two faces of the magnetic steel are respectively spaced apart from the arc inner walls of the fourth part and the sixth part to respectively enclose the third channel and the fourth channel.

[0022] According to another specific embodiment of the present utility model, the plurality of rotor laminations include eight, the plurality of first slot groups and the plurality of second slot groups include eight groups respectively, and the plurality of first accommodating slots and the plurality of second accommodating slots include two respectively.

[0023] By adopting the above technical solution, since the multiple rotor laminations of the rotor in the embodiment of the present application do not need to be axially fixed by cover plates and bolts, therefore, for example, eight rotor laminations can be stacked, which has a simple structure and effectively improves the output torque and reduces the load on the motor shaft.

[0024] According to another specific embodiment of the present invention, along the axial direction, the rotor laminations located at both ends of the plurality of rotor laminations are provided with a plurality of dynamic balancing holes.

[0025] By adopting the above technical solution, illustratively, the rotor of the embodiment of the present application is applied to the motor. After the rotor is assembled as a whole, there is no need to assemble additional counterweights (i.e., end covers) for subsequent dynamic balancing test correction. Since multiple rotor laminations are axially fixed by filling plastic in multiple injection molding cavities, and the gaps in the receiving grooves are filled, the overall strength of the rotor laminations is enhanced, and dynamic balancing holes can be punched directly on the rotor laminations at both ends, which simplifies the motor rotor structure and reduces the design difficulty of the original end cover that still needs to reserve holes.

[0026] The embodiment of the utility model further discloses a motor, comprising the above-mentioned rotor, wherein the multiple rotor laminations of the rotor are penetrated through the motor shaft.

[0027] By adopting the above technical scheme, the motor of the embodiment of the present application does not need to use two end covers to fix the multiple rotor laminations, thereby reducing the production cost and design difficulty; at the same time, when the motor of the embodiment of the present application is loaded with magnetic steel, it only needs to be directly integrally injected to fix the magnetic steel in the corresponding receiving groove, without repeatedly performing gluing and curing operations on each rotor lamination, effectively reducing time and production costs; in addition, the overall strength of the multiple rotor laminations in the embodiment of the present application is enhanced, and dynamic balancing holes can be directly punched on the rotor laminations at both ends without further adding counterweights (i.e., end covers), thereby simplifying the motor structure and reducing the design difficulty of the original end covers that still need to reserve holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1a A three-dimensional diagram showing a motor in some embodiments of the present invention.

[0029] Figure 1b An exploded view of a motor in some embodiments of the present invention is shown; wherein the figure shows two end covers and a plurality of bolts.

[0030] Figure 1c Showing the explosion of the motor in some embodiments of the present invention Figure 2 ; Among them, multiple magnetic steels are shown in the figure.

[0031] Figure 2 A three-dimensional diagram of a rotor according to an embodiment of the utility model is shown; wherein, the rotor laminations according to the embodiment of the application are penetrated through the motor shaft.

[0032] Figure 3 A front view of a rotor lamination in an embodiment of the utility model is shown; wherein, the figure shows a plurality of first accommodating slots and a plurality of second accommodating slots, and the corresponding magnetic steels are omitted.

[0033] Figure 4 An exploded view of two rotor laminations in an embodiment of the utility model is shown; wherein the figure shows a plurality of first accommodating slots, a plurality of second accommodating slots and corresponding magnetic steels.

[0034] Figure 5 A three-dimensional schematic diagram of the receiving groove in the embodiment of the utility model is shown; wherein, in order to facilitate the display of the receiving channel formed by the magnetic steel and the groove wall of the receiving groove, the receiving channel shown in the figure is in the form of a solid after injection molding.

[0035] Figure 6 A partial enlarged schematic diagram between the corresponding receiving grooves of two rotor laminations in an embodiment of the utility model is shown; wherein, for the convenience of display, one rotor lamination is omitted in the figure, the magnetic steel and the receiving groove form a receiving channel, and the receiving channels of the two rotor laminations are connected to form an injection cavity.

[0036] Figure 7A three-dimensional diagram of a rotor according to an embodiment of the utility model is shown; wherein the motor shaft and rotor laminations are omitted in the diagram, and a plurality of injection molding cavities are shown.

[0037] Figure 8 A partial enlarged view of a rotor lamination in an embodiment of the utility model is shown; wherein the figure shows a first accommodating groove and a second accommodating groove, and the corresponding magnetic steel is omitted.

[0038] Fig. 9 A partial enlargement of a rotor lamination in an embodiment of the utility model is shown. Figure 2 ; Among them, the figure shows the first accommodating groove and the second accommodating groove, and the corresponding magnetic steel.

[0039] Fig.10 A schematic diagram of the positions of the dynamic balancing holes of a rotor according to an embodiment of the utility model is shown; wherein six dynamic balancing holes are shown by way of example in the figure. DETAILED DESCRIPTION

[0040] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0041] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0042] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0043] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0044] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0045] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] See also Figure 1a to Figure 1c , Figure 1a and Figure 1b An electric machine 100 is shown as an example, wherein Figure 1a A perspective view of the electric machine 100 is shown. Figure 1b An exploded view of the motor 100 is shown. Figure 1c An exploded view of a portion of electric machine 100 is shown.

[0047] The motor 100 includes a shaft 110, a rotor 120 and two end covers 130. Figure 1a and Figure 1b Six rotors 120 are shown as an example, but the present invention is not limited thereto. Each rotor 120 is provided with a plurality of magnetic steel slots (not shown in the figure), and a magnetic steel 140 (such as Figure 1c shown).

[0048] In the actual production process, for the assembly of the above motor 100, the magnets 140 are usually loaded separately for each rotor 120, that is, multiple magnets 140 are inserted into the corresponding magnet slots of a rotor 120, and then glue is applied in each magnet slot to seal and fill each magnet slot. For example, glue (such as acrylic adhesive) is filled into each magnet slot of the rotor 120 in turn using a glue gun, and then the rotor 120 is placed in a light curing machine for UV pre-curing, and finally the pre-cured rotor 120 is placed in a curing furnace for heating to achieve complete curing of the glue.

[0049] Then, the above operation is performed on the second rotor 120. When all the rotors 120 are loaded with the magnets 140, the shaft 110 is cold-inserted into all the rotors 120. At this time, the shaft 110 is rotated in the axial direction (such as Figure 1bIn the direction A shown in the figure, the six rotors 120 are stacked together but not relatively fixed; at the same time, since the motor 100 needs to be dynamically balanced after assembly, it is usually necessary to add a counterweight to the motor, and during the test, the counterweight is punched using a deweighting method. Therefore, the motor 100 also includes the above-mentioned two end covers 130.

[0050] like Figure 1b As shown, along the axial direction, an end cover 130 is respectively provided at both ends of the six-piece rotor 120, and four long bolts 150 are used in conjunction with nuts to fix the two end covers 130 and the six-piece rotor 120 along the axial direction. After the assembly is completed, in the dynamic balancing test, holes are punched on the circumferential surfaces 131 of the two end covers 130 according to the test results.

[0051] In summary, the process of loading the magnetic steel 140 into the motor 100 is relatively complicated, and the production time and production cost are relatively high. At the same time, in order to achieve the axial fixation and dynamic balance requirements of the rotor, the manufacturing cost of the end cover 130 and the long bolts 150 is relatively high, and the design difficulty and requirements of the end cover 130 are relatively high.

[0052] Based on this, see Figure 2 The embodiment of the present application provides a rotor 2 and a motor 1 using the rotor 2. The rotor 2 of the embodiment of the present application can load and fix the magnetic steel 30 at a relatively low cost, and simultaneously realize the axial fixation of multiple rotor laminations 20 in the rotor 2. When assembling the motor 1 using the rotor 2 of the embodiment of the present application, there is no need to use an end cover, and dynamic balancing holes can be directly performed on the rotor laminations 20.

[0053] The rotor 2 of the embodiment of the present application includes eight rotor laminations 20, and the eight rotor laminations 20 are axially (eg Figure 2 The rotor 2 is stacked in the Z direction shown in the figure, and is used to pass through the motor shaft 10. Figure 2 Eight rotor laminations 20 are shown as an example, but the embodiment of the present application does not limit the number of rotor laminations 20. For example, three, five, six, nine, etc. rotor laminations 20 may also be provided.

[0054] See also Figure 2 and Figure 3 , Figure 2 The three-dimensional diagram of the motor 1 according to the embodiment of the present application is shown as an example. Figure 3 A front view of one of the rotor laminations 20 is shown as an example.

[0055] Each rotor lamination 20 is provided with thirty-two receiving slots 201. Exemplarily, a portion of the receiving slots 201 is in the shape of a shorter irregular ellipse, and another portion of the receiving slots 201 is in the shape of an irregular broken line. However, the embodiment of the present application does not limit the number and shape of the receiving slots 201. For example, six, nine, twelve, forty-one, etc. receiving slots 201 may be provided, or receiving slots 201 in the shape of a straight line, a rectangle, a trapezoid, etc. may be provided. As long as the magnet 30 can be accommodated and the rotor lamination 20 generates torque through an alternating magnetic field, they are within the protection scope of the embodiment of the present application.

[0056] See also Figure 3 and Figure 4 , Figure 4 An exploded view of two rotor laminations 20 is shown as an example. Figure 4 Each receiving groove 201 penetrates the rotor lamination 20, and along the axial direction, the receiving grooves 201 between adjacent rotor laminations 20 correspond one to one.

[0057] In a possible implementation manner, the one-to-one correspondence of the receiving grooves 201 includes: during the assembly process, there is no deflection angle between adjacent rotor laminations 20 , and at this time, the corresponding receiving grooves 201 correspond one-to-one along the axial direction.

[0058] In another possible implementation, the one-to-one correspondence of the receiving slots 201 includes: during the assembly process, adjacent rotor laminations 20 are deflected at a fixed angle, that is, adjacent rotor laminations 20 are radially staggered at a fixed angle, for example, after the adjacent rotor laminations 20 are deflected by 0.5°, 1.3°, 2°, and 2.3°, a portion of the corresponding receiving slots 201 still remain axially corresponding. In this implementation, the noise, vibration, and acoustic roughness of the rotor can be further improved, but the embodiments of the present application are not limited to this.

[0059] It can be seen that each receiving slot 201 of each rotor lamination 20 is provided with a magnetic steel 30, and the magnetic steel 30 and the slot wall of the corresponding receiving slot 201 form a receiving channel 2010. Figure 4 As shown, each receiving groove 201 includes two receiving channels 2010, that is, the magnetic steel 30 is arranged in the middle of the receiving groove and is spaced apart from the groove walls on both sides of the receiving groove 201 (described in detail later). However, the embodiment of the present application does not limit the number and shape of the receiving channels 2010, that is, the magnetic steel 30 can also fit with one of the groove walls of the receiving groove 201 without being spaced apart, and in this case, a receiving channel 2010 is formed between the magnetic steel 30 and the receiving groove 201.

[0060] See also Figure 4 and Figure 5 , Figure 5As an example, a perspective view of four receiving grooves 201 in the same rotor core 20 is shown. Figure 5 Four dotted line areas m are shown in the figure. The dotted line areas m are used to set the magnetic steel. The remaining part is the accommodating channel 2010. For the convenience of display, Figure 5 The receiving channel 2010 is in a solid form (to be explained later).

[0061] Further, see Figure 4 and Figure 6 , along the axial direction, the corresponding accommodating channels 2010 are connected to each other, so as to form an injection cavity 200, the length of which depends on the number of the rotor laminations 20, for example, Figure 6 As shown, Figure 6 The injection molding cavity 200 formed by the receiving channel 2010 between two rotor laminations 20 is shown as an example, wherein, for the convenience of illustration, Figure 6 One rotor lamination 20 is omitted.

[0062] As you can see, Figure 6 The dotted line area m is two magnetic steels 30 located in the corresponding receiving grooves 201, and the portion outside the dotted line area m is the physical form of the injection cavity 200 after the plastic is filled (injection molding) inside. That is, the injection cavity 200 is the two receiving grooves 201 along the axial direction (such as Figure 6 The volume space of the cavity connected in the Z direction (shown in FIG. 1 ) minus the volume space of the two magnetic steels 30 is Figure 6 Four receiving channels 2010 are shown.

[0063] It should be noted that, since the accommodating channel 2010 is surrounded by the magnetic steel 30 and the groove wall of the corresponding accommodating groove 201, the accommodating channel 2010 includes some gaps 2000. Figure 6 The gaps 2000 shown as dashed lines are part of the accommodating channel 2010 and also part of the injection cavity 200 .

[0064] Thus, the six rotor laminations 20 are molded in the injection cavity 200 to achieve axial (eg Figure 6 At the same time, the magnetic steel 30 is fixed in the corresponding receiving groove 201.

[0065] Further reading Figure 7 , Figure 7 As an example, the three-dimensional view of the rotor 2 omitting six rotor laminations shows that: Figure 7 32 injection cavities 200 are shown as an example, each of which is provided with six magnetic steels 30, and the six rotor laminations are axially connected (such as Figure 7 connection in the Z direction shown in FIG.

[0066] See also Figures 2 to 7 By adopting the above technical solution, a plurality of receiving grooves 201 for loading the magnetic steel 30 are opened on each rotor lamination 20, and the receiving grooves 201 of the plurality of rotor laminations 20 correspond to each other in the axial direction. When the magnetic steel 30 is arranged in the receiving groove 201, it can form a receiving channel 2010 with the groove wall of the corresponding receiving groove 201. These receiving channels 2010 are interconnected in the axial direction to form a plurality of injection cavities 200.

[0067] That is to say, when the rotor 2 of the embodiment of the present application is assembled in the motor 1, all the rotor laminations 20 can be inserted into the motor shaft 10 at the same time. At this time, the above-mentioned multiple injection molding cavities 200 are interconnected along the axial direction, and then the multiple injection molding cavities 200 are injected at the same time. Then, the multiple injection molding cavities 200 after injection can fix the multiple rotor laminations 20.

[0068] Based on this, for example, when the rotor 2 of the embodiment of the present application is applied to the motor 1, there is no need to use two end covers to fix the multiple rotor laminations 20, which reduces the production cost and design difficulty; at the same time, when the rotor 2 of the embodiment of the present application is loaded with the magnetic steel 30, it only needs to be directly integrally injected to fix the magnetic steel 30 in the corresponding receiving groove 201, without repeatedly performing gluing and curing operations on each rotor lamination 20, which effectively reduces time and production costs.

[0069] In addition, see Figure 2 and Fig.10 , along the axial direction (such as Figure 2 In the Z direction shown in FIG, two rotor laminations located at both ends of the plurality of rotor laminations are provided with a plurality of dynamic balancing holes 202.

[0070] The embodiment of the present application does not limit the number and position of the dynamic balancing holes 202, and corresponding adjustments are made according to subsequent dynamic balancing tests, for example Fig.10 The schematic diagram of the position of the dynamic balancing holes of the rotor 2 is shown as an example. Fig.10 The dotted line Q is shown as an example in FIG. Fig.10 Six dynamic balancing holes 202 are shown as an example, but this embodiment of the present application is not limited to this.

[0071] The overall strength of the multiple rotor laminations 20 in the embodiment of the present application is enhanced, and dynamic balancing holes can be directly punched on the rotor laminations 20 at both ends without further adding counterweights (i.e., end covers). When the rotor 2 in the embodiment of the present application is applied to the motor 1, the structure of the motor 1 can be effectively simplified, reducing the design difficulty of the original end cover that still needs to reserve holes.

[0072] In one possible implementation, see Figure 3 The thirty-two receiving slots 201 include eight first slot groups E, each of which includes two first receiving slots 2011 (i.e., a portion of the receiving slots 201 in a shorter irregular elliptical shape), along the circumferential direction of the rotor lamination 20 (e.g., Figure 3 In the R direction shown in FIG, eight first groove groups E are spaced apart at a first pitch L1.

[0073] In one possible implementation, see Figure 3 Combined with Figure 2 and Figure 5 Each first receiving groove 2011 is provided with a magnetic steel 30, and the groove wall of the first receiving groove 2011 and the magnetic steel 30 form a first receiving channel 20101; along the circumferential direction (such as Figure 3 The two first receiving grooves 2011 in each first groove group E are arranged at a second spacing L2, and along the radial direction of the rotor lamination 20 (such as Figure 3 That is, the symmetry line between the two receiving slots 2011 in each first slot group E (not shown in the figure, but can be exemplarily referred to as the symmetry line N described later) extends along the radial direction of the rotor lamination 20. The first spacing L1 is greater than the second spacing L2.

[0074] The embodiment of the present application does not limit the number of first slot groups E and the number of first receiving slots 2011 in each first slot group E. For example, three, six, nine, ten, etc. first slot groups E may be provided, and each first slot group E may be provided with three, five, etc. first receiving slots 2011. As long as the magnets 30 can be accommodated and the rotor laminations 20 can generate torque through an alternating magnetic field, they are within the protection scope of the embodiment of the present application.

[0075] See also Figure 8 In a possible implementation, the first accommodating channel 20101 includes a first channel 201011 and a second channel 201012, and the first accommodating groove 2011 includes a first portion 20111, a second portion 20112 and a third portion 20113 that are sequentially connected.

[0076] It can be seen that the first part 20111 and the third part 20113 are arc-shaped, and the second part 20112 is rectangular, but the embodiment of the present application does not limit the shapes of the first part 20111, the second part 20112 and the third part 20113.

[0077] See also Figure 8 and Fig. 9The second part 20112 is provided with a magnet 30, one of the surfaces of the magnet 30 is in contact with a portion of the inner wall of the second part 20112, the other surface of the magnet is in contact with another portion of the inner wall of the second part 20112, the other side surface of the magnet 30 is in contact with the arc inner wall of the first part 20111, so as to form the above-mentioned first channel 201011, and the other side surface of the magnet 30 is in contact with the arc inner wall of the third part 20113, so as to form the above-mentioned second channel 201012.

[0078] Continue reading Figure 8 and Fig. 9 Exemplarily, the second part 20112 includes a first inner wall 201121 and a second inner wall 201122 , and the magnetic steel 30 includes a first surface 301 , a second surface 302 , a third surface 303 and a fourth surface 304 .

[0079] The first inner wall 201121 and the second inner wall 20112 are arranged radially (such as Figure 8 The Y direction shown in FIG. 1 is arranged at intervals, and along the tangential direction of the circumference (such as Figure 8 The X direction shown in FIG. 1 extends.

[0080] The first surface 301 and the second surface 302 of the magnetic steel 30 are radially (eg Fig. 9 201122) are arranged at intervals. For example, along the radial direction, the first surface 301 and the first inner wall 201121 are in contact with each other, and the second surface 302 and the second inner wall 201122 are connected by surface. Surface connection means that the second surface 302 and the second inner wall 201122 can be in contact with each other, or although the two are connected, there is a gap, and the gap forms the above-mentioned gap 2000 (such as Figure 6 shown).

[0081] Continue reading Figure 8 and Fig. 9 Exemplarily, the first part 20111 includes a first arcuate wall 201111, the third part 20113 includes a second arcuate wall 201131, the third surface 303 of the magnetic steel 30 and the second arcuate wall 201131 form the above-mentioned second channel 201012, and the fourth surface 304 and the first arcuate wall 201111 form the above-mentioned first channel 201011.

[0082] In one possible implementation, see Figure 3 The thirty-two receiving grooves 201 also include eight second groove groups F, each of which includes two second receiving grooves 2012 (i.e., another part of the receiving grooves 201 in the irregular fold line shape), along the circumferential direction (such as Figure 3 The eight second slot groups F are arranged at intervals, and a portion of each second slot group F is located between the adjacent first slot groups E.

[0083] In one possible implementation, see Figure 3 Combined with Figure 2 and Figure 5 Each second receiving groove 2012 is provided with a magnetic steel 30, and the groove wall of the second receiving groove 2012 and the magnetic steel 30 form a second receiving channel 20102; along the circumferential direction (such as Figure 3 The two second receiving grooves 2012 in each second groove group F are arranged at intervals and along the radial direction (such as Figure 3 That is, the symmetry line N between the two second receiving grooves 2012 extends along the radial direction of the rotor lamination. It can be seen that, exemplarily, the two second receiving grooves 2012 in each second slot group F are in an eight-shaped shape.

[0084] The embodiment of the present application does not limit the number of second slot groups F and the number of second receiving slots 2012 in each second slot group F. For example, three, six, nine, ten, etc. second slot groups F may be provided, and each second slot group F may be provided with three, five, etc. second receiving slots 2012. As long as the magnets 30 can be accommodated and the rotor laminations 20 can generate torque through an alternating magnetic field, they are within the protection scope of the embodiment of the present application.

[0085] See also Figure 8 In a possible implementation, the second accommodating channel 20102 includes a third channel 201021 and a fourth channel 201022, and the second accommodating groove 2012 includes a fourth portion 20121, a fifth portion 20122 and a sixth portion 20123 which are connected in sequence.

[0086] It can be seen that a portion of the fourth portion 20121 is arc-shaped, the sixth portion 20123 is arc-shaped as a whole, and the fifth portion 20122 is rectangular, but the embodiment of the present application does not limit the shapes of the fourth portion 20121, the fifth portion 20122, and the sixth portion 20123. The fourth portion 20121 is radially (such as Figure 8 The fifth portion 20122 extends in the first direction (as shown in the Y direction). Figure 8 The first direction extends in the S direction or the T direction shown in the figure, and the first direction intersects the radial direction at an angle.

[0087] It should be noted that the first direction is exemplarily the extending direction of the fifth portion 20122. Figure 8In the figure, the fifth portion 20122 of the second receiving groove 2012 on the left side (i.e., the side indicated by the X1 direction) is extended in the S direction, and the fifth portion 20122 of the second receiving groove 2012 on the right side (i.e., the side indicated by the X2 direction) is extended in the T direction. When only one second receiving groove 2012 is provided in the second groove group, the first direction may be the S direction or the T direction, which is not limited in the embodiment of the present application.

[0088] See also Figure 8 and Fig. 9 The fifth part 20122 is provided with a magnetic steel 30, one of the surfaces of the magnetic steel 30 provided in the fifth part 20122 is in contact with a part of the inner wall of the fifth part 20122, another surface of the magnetic steel 30 provided in the fifth part 20122 is in contact with another part of the inner wall of the fifth part 20122, one side surface of the magnetic steel 30 and the arc inner wall of the fourth part 20121 are spaced apart to form the above-mentioned third channel 201021, and the other side surface of the magnetic steel 30 and the arc inner wall of the sixth part 20123 are spaced apart to form the above-mentioned fourth channel 201022.

[0089] Continue reading Figure 8 and Fig. 9 Exemplarily, the fifth part 20122 includes a third inner wall 201221 and a fourth inner wall 201222 , and the magnetic steel 30 disposed in the fifth part 20122 also includes a first surface 301 , a second surface 302 , a third surface 303 and a fourth surface 304 .

[0090] The third inner wall 201221 and the fourth inner wall 201222 are arranged along the first direction (eg Figure 8 The S direction or T direction shown in FIG. 1 extends in a radial direction (such as Figure 8 The first surface 301 and the second surface 302 of the magnetic steel 30 provided in the fifth part 20122 are also arranged in the radial direction (as shown in the Y direction). Fig. 9 The Y direction shown in FIG. 1 is set at intervals.

[0091] For example, along the radial direction (such as Fig. 9 In the Y direction shown in FIG, the first surface 301 and the third inner wall 201221 are in contact with each other, and the second surface 302 and the fourth inner wall 201222 are in contact with each other.

[0092] Continue reading Figure 8 and Fig. 9, illustratively, the fourth part 20121 includes a third curved wall 201211, the sixth part 20123 includes a fourth curved wall 201231, the third surface 303 of the magnetic steel 30 and the fourth curved wall 201231 form the above-mentioned fourth channel 201022, and the fourth surface 304 and the third curved wall 201211 form the above-mentioned third channel 201021.

[0093] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A rotor, characterized in that: include: Motor shaft; A plurality of rotor laminations, wherein the plurality of rotor laminations are stacked along the axial direction of the motor shaft, each of the rotor laminations is provided with a plurality of receiving slots, and along the axial direction, the plurality of receiving slots penetrate the corresponding rotor laminations, and along the axial direction, the plurality of receiving slots of adjacent rotor laminations correspond to each other one by one; wherein, A magnetic steel is provided in each of the receiving grooves of each of the rotor laminations. The magnetic steel and the groove wall of the corresponding receiving groove form a receiving channel. Along the axial direction, all the receiving channels are connected to form an injection cavity. The multiple rotor laminations are connected by filling plastic in the injection cavity.

2. The rotor according to claim 1, characterized in that The multiple accommodating slots include multiple first slot groups, each of which includes multiple first accommodating slots. Along the circumferential direction of the rotor laminations, the multiple first slot groups are distributed at first spacings; each of the first accommodating slots is provided with the magnetic steel, and the slot wall of the first accommodating slot and the magnetic steel form a first accommodating channel; along the circumferential direction, the multiple first accommodating slots of each of the first slot groups are arranged at second spacings, and are symmetrically arranged along the radial direction of the rotor laminations; the first spacing is greater than the second spacing.

3. The rotor according to claim 2, characterized in that The first accommodating channel includes a first channel and a second channel; the first accommodating groove includes a first part, a second part and a third part which are connected in sequence, the first part and the third part are arc-shaped, the second part is rectangular, the second part is provided with the magnetic steel, two surfaces of the magnetic steel are respectively fitted with the inner wall of the second part, and the other two surfaces of the magnetic steel are respectively spaced apart from the arc inner walls of the first part and the third part to respectively enclose the first channel and the second channel.

4. The rotor according to claim 3, characterized in that The plurality of accommodating grooves further include a plurality of second groove groups, each of which includes a plurality of second accommodating grooves. The plurality of second groove groups are distributed at intervals along the circumferential direction, and a portion of each of the second groove groups is located between adjacent first groove groups.

5. The rotor according to claim 4, characterized in that The magnetic steel is arranged in each of the second accommodating grooves, and the groove wall of the second accommodating groove and the magnetic steel form a second accommodating channel; along the circumferential direction, the multiple second accommodating grooves are arranged at intervals and symmetrically along the radial direction.

6. The rotor according to claim 5, characterized in that Each of the second slot groups includes two second accommodating slots, and the two second accommodating slots are in an eight-shaped shape.

7. The rotor according to claim 5 or 6, characterized in that: The second accommodating channel includes a third channel and a fourth channel; the second accommodating groove includes a fourth part, a fifth part and a sixth part which are connected in sequence, the fourth part extends along the radial direction, the sixth part is arc-shaped, the fifth part is rectangular and extends along the first direction, the first direction intersects with the radial direction, and the fifth part is provided with the magnetic steel; two of the surfaces of the magnetic steel are respectively fitted with the inner wall of the fifth part, and the other two surfaces of the magnetic steel are respectively spaced apart from the arc inner walls of the fourth part and the sixth part to respectively enclose the third channel and the fourth channel.

8. The rotor according to claim 7, characterized in that The plurality of rotor laminations includes eight, the plurality of first slot groups and the plurality of second slot groups include eight groups respectively, and the plurality of first accommodating slots and the plurality of second accommodating slots include two respectively.

9. The rotor according to claim 1, characterized in that Along the axial direction, the rotor laminations located at both ends of the plurality of rotor laminations are provided with a plurality of dynamic balancing holes.

10. A motor, characterized in that: The rotor comprises the rotor of claim 1, wherein the plurality of rotor laminations of the rotor are passed through the motor shaft.

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