Rotor and motor

Abstract

The utility model relates to the technical field of rotors, and discloses a rotor and a motor, the rotor comprises a rotating shaft, a rotor iron core, a fixing member and magnetic steel, the rotor iron core is provided with a through hole penetrating through the rotor iron core, the rotating shaft penetrates through the through hole and is fixed on the rotor iron core, and the rotor iron core is formed by laminating a plurality of silicon steel sheets. The outer side face of the rotor core is recessed inwards to form a plurality of clamping grooves penetrating through the thickness direction of the rotor core, the number of the fixing pieces is the same as that of the clamping grooves, each fixing piece comprises a clamping part clamped to the corresponding clamping groove and a fixing part extending and protruding out of the outer side face of the rotor core along the clamping part, and the magnetic steel is arranged between the fixing parts of every two adjacent fixing pieces in a clamped mode. The outer side face of the rotor core is recessed inwards to form the clamping groove, the clamping groove and the fixing piece are in tight concave-convex fit, and when the fixing piece is heated, the two ends of the fixing piece can extend to the outer portion of the upper surface and the outer portion of the lower surface of the rotor core towards the two ends of the clamping groove along the thickness of the rotor core. Therefore, the fixing piece is prevented from loosening due to axial force applied to the silicon steel sheets at two ends of the rotor core when heated.

Description

Technical Field

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

[0002] An electric motor consists of a rotor and a stator, which convert electrical energy into mechanical energy through their interaction. The rotor consists of a rotor core and magnets. The rotor core is made up of multiple stacked steel sheets, with multiple grooves distributed along its circumference. Each groove contains a corresponding magnet fixing component, with the magnet positioned between two adjacent magnet fixing components.

[0003] In related technologies, a retaining ring is provided at one end of the rotor core along the thickness direction to connect with multiple magnet fixing components, thereby improving the firmness of the connection between the magnet fixing components and the rotor core. However, the retaining ring restricts the magnets to be installed only from the side of the rotor core away from the retaining ring, reducing the flexibility of magnet installation. Furthermore, the plastic retaining ring is not conducive to axial heat dissipation of the magnets, reducing the heat resistance of the motor. In other related technologies, cover steel plates without grooves are provided at both ends of the rotor core along the thickness direction to prevent the magnet fixing components located between the cover steel plates at both ends of the rotor core from detaching from the ends of the rotor core. However, when the magnet fixing components expand axially along the rotor core due to heat, the ends of the magnet fixing components will apply axial force to the cover magnets, which may cause the cover steel plates to loosen, affecting the normal use of the rotor core.

[0004] Therefore, there is a need to provide a rotor to solve the above problems. Utility Model Content

[0005] To address the aforementioned problems, the main objective of this utility model is to provide a rotor and motor that can achieve the design requirements of improving the flexibility of magnet installation and preventing the steel plates at both ends of the rotor core from loosening.

[0006] In a first aspect, the present invention provides a rotor, the rotor comprising:

[0007] Shaft;

[0008] The rotor core has a through hole therethrough. The rotor core is formed by stacking multiple silicon steel sheets. The rotating shaft passes through the through hole and is fixed to the rotor core. The outer side of the rotor core is recessed inward to form multiple spaced grooves that penetrate the thickness of the rotor core.

[0009] The fastener includes a snap-fit ​​portion that snaps into the slot and a fixing portion that extends along the snap-fit ​​portion and protrudes from the outer side of the rotor core. The number of fasteners is the same as the number of slots, and the snap-fit ​​portion and the slots correspond one-to-one to form a tight convex-concave fit. When the fastener is heated, both ends of the fastener can extend to the outside of the slot along the thickness direction of the rotor core.

[0010] A magnet, which is clamped between the fixing portions of two adjacent fixing members.

[0011] Preferably, the rotor core is formed by stacking multiple first silicon steel sheets and at least one second silicon steel sheet. The outer side of the first silicon steel sheet is recessed inward to form multiple spaced first notches, and the outer side of the second silicon steel sheet is recessed inward to form multiple spaced second notches. The number of first notches and the number of second notches are the same and are arranged in a one-to-one correspondence to form the locking slot. The locking part is in concave-convex fit with the first notch and the locking part is in concave-convex fit with the second notch.

[0012] Preferably, the depth of the first notch is greater than the depth of the second notch.

[0013] Preferably, the width of the first notch is greater than the width of the second notch.

[0014] Preferably, the first notch has a bottom end and an opening end that are disposed opposite to each other, and the width of the bottom end of the first notch is greater than the width of the opening end of the first notch.

[0015] Preferably, the first notch includes a tapered portion and a rectangular portion, the width of the tapered portion gradually decreases along the direction away from the center of the rotor core, and the rectangular portion communicates with the end of the tapered portion away from the center of the rotor core and extends to the edge of the first silicon steel sheet to form an open end.

[0016] Preferably, the outer side of the snap-fit ​​portion is recessed inward to form a groove, and the groove engages with the second notch.

[0017] Preferably, the groove is formed by recessing inward from the outer side of the latching portion along the direction from the center of the rotor core to the edge of the rotor core, and / or, the groove is formed by recessing inward from the outer side of the latching portion along the circumferential direction of the rotor core.

[0018] Preferably, the second silicon steel sheet is sandwiched between two adjacent first silicon steel sheets.

[0019] Secondly, this utility model provides an electric motor, which includes the rotor described above.

[0020] The rotor and motor of this utility model embodiment include a rotor comprising a shaft, a rotor core, a fixing member, and a magnet. The rotor core has a through hole, through which the shaft passes and is fixed. Multiple silicon steel sheets are stacked, and the rotor core has multiple slots extending through its thickness direction on its periphery. The fixing member includes a snap-fit ​​portion that snaps into the slot and a fixing portion that extends along the snap-fit ​​portion and protrudes from the outer surface of the rotor core. Each slot and the snap-fit ​​portion of a fixing member form a convex-concave fit, ensuring the fixing member is securely connected within the slot of the rotor core and guaranteeing the reliability of the connection between the fixing member and the slot. The magnet is sandwiched between the fixing portions of two adjacent fixing members. The reliable connection between the snap-fit ​​portion and the slot ensures the reliability of the connection between the magnet and the fixing member. The rotor core includes an upper surface and a lower surface, which are spaced apart along the thickness direction of the rotor core. The two ends of the fixing member along the thickness direction of the rotor core are flush with the upper and lower surfaces, respectively. When the fixing component is heated, both ends of the fixing component extend along the thickness of the rotor core towards both ends of the slot to the upper and lower surfaces of the rotor core. This prevents the heated fixing component from exerting axial force on the silicon steel sheets at both ends of the rotor core, preventing the silicon steel sheets at both ends of the rotor core from loosening, improving the robustness and reliability of the rotor core, and ensuring the normal operation of the rotor core. Compared with the prior art, in this embodiment of the utility model, one end of the rotor core is not provided with a plastic retaining ring. The magnet can be installed from either end of the rotor core between two adjacent fixing components, thereby improving the flexibility of magnet installation. In addition, the absence of a retaining ring can also improve the axial heat dissipation of the magnet and improve the heat resistance of the rotor and motor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an isometric view of the overall structure assembly of the rotor according to an embodiment of this utility model;

[0023] Figure 2 yes Figure 1 A partial structural schematic diagram of the rotor is shown;

[0024] Figure 3 yes Figure 2 A partial cross-sectional view of the rotor shown.

[0025] Figure 4 yes Figure 1 The isometric view of the rotor core and the fixing components shown.

[0026] Figure 5 yes Figure 1 The image shows an isometric view of the overall structure of the rotor core.

[0027] Figure 6 yes Figure 5 A partial isometric view of the rotor core shown.

[0028] Figure 7 yes Figure 5 The front view of the rotor core is shown.

[0029] Figure 8 yes Figure 7 The front view of the first silicon steel sheet is shown below;

[0030] Figure 9 yes Figure 1 The isometric view of the fastener shown. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed by this utility model can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0032] Reference Appendix Figure 1 To be continued Figure 9 The present invention provides a rotor 100, which includes a rotor core 10, a fixing member 20, a magnet 30, and a rotating shaft 40. Specifically, the rotor core 10 has a through hole 101, and the rotating shaft 40 passes through the through hole 101 and is fixed to the rotor core 10. The rotor core 10 is formed by stacking multiple silicon steel sheets 11. The outer surface of the rotor core 10 is recessed inward to form multiple spaced slots 12 that penetrate the thickness direction of the rotor core 10. The fixing member 20 includes a snap-fit ​​part 21 that snaps into the slot 12 and a fixing part 22 that extends along the snap-fit ​​part 21 and protrudes from the outer surface of the rotor core 10. The number of fixing members 20 is the same as the number of slots 12. The rotor core 10 includes an upper surface and a lower surface that are spaced apart relative to each other in the thickness direction. The two ends of the fixing member 20 along the thickness direction are flush with the upper surface and the lower surface, respectively. The magnet 30 is sandwiched between the fixing parts 22 of two adjacent fixing members 20.

[0033] The rotor 100 of this embodiment includes a rotor core 10, a fixing member 20, a magnet 30, and a rotating shaft 40. The rotor core 10 has a through hole 101 extending through it. The rotating shaft 40 passes through the through hole 101 and is fixed to the rotor core 10. The rotor core 10, formed by stacking multiple silicon steel sheets 11, has multiple slots 12 extending through the thickness direction of the rotor core 10 on its periphery. The fixing member 20 includes a snap-fit ​​portion 21 that snaps into the slot 12 and a fixing portion 22 that extends along the snap-fit ​​portion 21 and protrudes from the outer surface of the rotor core 10. Each slot 12 forms a concave-convex fit with the snap-fit ​​portion 21 of a fixing member 20, so that the fixing member 20 is firmly connected to the slot 12 of the rotor core 10, ensuring the reliability of the connection between the fixing member 20 and the slot 12. The magnet 30 is clamped between the fixing parts 22 of two adjacent fixing members 20. The reliable connection between the snap-fit ​​part 21 and the slot 12 ensures the reliability of the connection between the magnet 30 and the fixing member 20. The rotor core 10 includes an upper surface and a lower surface, which are spaced apart along the thickness direction of the rotor core 10. The fixing members 20 are flush with the upper and lower surfaces at both ends along the thickness direction of the rotor core 10, respectively. When the fixing members 20 are heated, both ends of the fixing members 20 extend along the thickness of the rotor core 10 towards both ends of the slot 12 to the outside of the upper and lower surfaces of the rotor core 10. This prevents the fixing members 20 from applying axial force to the silicon steel sheets 11 at both ends of the rotor core 10 when heated, preventing the silicon steel sheets 11 at both ends of the rotor core 10 from loosening, improving the firmness and reliability of the rotor core 10, and ensuring the normal operation of the rotor core 10. Compared with the prior art, in this embodiment of the utility model, one end of the rotor core 10 is not provided with a plastic retaining ring, and the magnet 30 can be installed from either end of the rotor core 10 between two adjacent fixing parts 20, thereby improving the installation flexibility of the magnet 30. In addition, the absence of a retaining ring can also improve the axial heat dissipation of the magnet 30 and improve the heat resistance of the rotor 100 and the motor.

[0034] Preferably, as shown in the appendix Figure 5 To be continued Figure 7As shown, the rotor core 10 is formed by stacking multiple first silicon steel sheets 111 and at least one second silicon steel sheet 112. The outer side of the first silicon steel sheet 111 is recessed inward to form multiple spaced first notches 1111, and the outer side of the second silicon steel sheet 112 is recessed inward to form multiple spaced second notches 1121. The number of first notches 1111 is the same as the number of second notches 1121, and the first notches 1111 and the second notches 1121 are arranged in a one-to-one correspondence to form a slot 12 that penetrates the thickness direction of the rotor core 10. That is, the number of slots 12 is the same as the number of first notches 1111 and the number of second notches 1121. When the fastener 20 is tightly engaged with the corresponding slot 12, the snap-fit ​​portion 21 of the fastener 20 inserted into the first notch 1111 conforms to the shape of the first notch 1111. That is, the fastener 20 engages with the first notch 1111 through the snap-fit ​​portion 21, and the snap-fit ​​portion 21 of the fastener 20 engages with the second notch 1121. The first notch 1111 and the second notch 1121 achieve the engagement between the fastener 20 and the slot 12, thereby preventing the fastener 20 from coming out of the slot 12 and improving the firmness and reliability of the connection between the fastener 20 and the slot 12.

[0035] Preferably, the depth of the first notch 1111 is greater than the depth of the second notch 1121. When the fixing member 20 mates with the slot 12, a portion of the fixing member 20 is located within the first notch 1111 and matches the shape and size of the first notch 1111, forming a concave-convex fit between the fixing member 20 and the first notch 1111. Since the depth of the second notch 1121 is less than the depth of the first notch 1121, the second notch 1121 abuts against the fixing member 20 radially along the rotor core 10, thereby ensuring a tight fit between the fixing member 20 and the slot 12. In this embodiment, the preferred solution is that the depth of the first notch 1111 is greater than the depth of the second notch 1121.

[0036] In other embodiments, the width of the first notch 1111 is greater than the width of the second notch 1121. When the fastener 20 engages with the slot 12, a portion of the fastener 20 fits within the first notch 1111 and matches its shape and size, forming a convex-concave fit. Since the width of the second notch 1121 is smaller than the width of the first notch 1111, the second notch 1121 abuts against the fastener 20 along the circumference of the rotor core 10, thereby ensuring a tight fit between the fastener 20 and the slot 12.

[0037] Preferably, the first notch 1111 has a bottom end and an opening end that are oppositely disposed, and the width of the bottom end of the first notch 1111 is greater than the width of the opening end of the first notch 1111. The bottom end of the first notch 1111 is close to the center of the rotor core 10, and the opening end of the first notch 1111 is far from the center of the rotor core 10, that is, the width of the bottom end of the first notch 1111 close to the rotor core 10 is greater than the width of the opening end of the first notch 1111 far from the rotor core 10. Correspondingly, the shape of the part of the fixing member 20 inserted into the first notch 1111 is the same as the shape of the first notch 1111, and the size of the part of the fixing member 20 inserted into the first notch 1111 is the same as the size of the first notch 1111. The bottom width of the first notch 1111 is greater than the width of its opening end, which can prevent the fixing member 20 from coming out of the first notch 1111 along the radial direction of the rotor core 10, realize the concave-convex fit between the fixing member 20 and the first notch 1111, and ensure the reliability of the connection between the first notch 1111 and the fixing member 20.

[0038] Preferably, as shown in the appendix Figure 8 The first notch 1111 shown includes a conical portion a and a rectangular portion b. The width of the conical portion a gradually decreases along the direction away from the center of the rotor core 10. The rectangular portion b is connected to the end of the conical portion a away from the center of the rotor core 10, that is, the rectangular portion b is connected to the end of the conical portion a with a smaller width, and extends to the edge of the first silicon steel sheet 111 to form an open end. The width of the rectangular portion b is less than or equal to the width of the end of the rectangular portion b away from the center of the rotor core 10, so as to ensure that the width of the bottom end of the first notch 1111 is greater than the width of the open end of the first notch 1111.

[0039] Correspondingly, the second notch 1121 is rectangular in shape, and the size of the second notch 1121 is the same as the size of the rectangular portion b of the first notch 1111, and the position of the second notch 1121 corresponds to the position of the rectangular portion b of the first notch 1111.

[0040] Preferably, at least one second silicon steel sheet 112 is located between multiple first silicon steel sheets 111, that is, the second silicon steel sheet 112 is not located at both ends of the rotor core 10, so as to reduce the installation difficulty of the fastener 20.

[0041] Preferably, at least one second silicon steel sheet 112 is located in the middle of the rotor core 10. When the fixing member 20 is installed in the slot 12, at least one second silicon steel sheet 112 abuts against the middle of the fixing member 20 so that the middle of the fixing member 20 is subjected to force, thereby ensuring that the distance between the two ends of the fixing member 20 and the outer wall of the rotor core 10 is equivalent, which facilitates the installation of the magnet 30.

[0042] Preferably, at least two second silicon steel sheets 112 are arranged adjacently, that is, at least two second notches 1121 are correspondingly adjacent. The contact between the fastener 20 and at least two adjacent second notches 1121 can prevent the fastener 20 from being subjected to concentrated stress. At the same time, the bottoms of at least two adjacent second notches 1121 can share the force applied by the fastener 20, avoiding damage to a single second silicon steel sheet 112 due to excessive stress. In this embodiment, the two second silicon steel sheets 112 are arranged adjacently, that is, the two second notches 1121 are correspondingly adjacent. The two adjacent second silicon steel sheets 112 can prevent the fastener 20 from being subjected to concentrated stress, and at the same time, reduce the stress on a single silicon steel sheet 11.

[0043] Preferably, such as Figure 3 and Figure 9 As shown, the outer side of the snap-fit ​​part 21 is recessed inward to form a groove 211. The groove 211 and the second notch 1121 are in concave-convex fit. The concave-convex fit between the fastener 20 and the slot 12 is achieved by the outer side of the snap-fit ​​part 21 fitting with the first notch 1111 and the groove 211 of the snap-fit ​​part 21 fitting with the second notch 1121.

[0044] Preferably, the groove 211 can be formed by recessing inward from the outer side of the latching portion 21 along the direction from the center of the rotor core 10 to the edge of the rotor core 10, or the groove 211 can be formed by recessing inward from the outer side of the latching portion 21 along the circumferential direction of the rotor core 10, or the groove 211 can be formed by recessing inward from the outer side of the latching portion 21 along both the direction from the center to the edge of the rotor core 10 and the circumferential direction.

[0045] Secondly, this utility model provides an electric motor, which includes the rotor 100 as described above.

[0046] The motor of this embodiment includes a rotor 100, which comprises a rotor core 10, a fixing member 20, a magnet 30, and a rotating shaft 40. The rotor core 10 has a through hole 101 extending through it, and the rotating shaft 40 passes through the through hole 101 and is fixed to the rotor core 10. The rotor core 10, formed by stacking multiple silicon steel sheets 11, has multiple slots 12 extending through the thickness direction of the rotor core 10 on its periphery. The fixing member 20 includes a snap-fit ​​portion 21 that snaps into the slot 12 and a fixing portion 22 that extends along the snap-fit ​​portion 21 and protrudes from the outer surface of the rotor core 10. Each slot 12 forms a tight convex-concave fit with a fixing member 20, so that the fixing member 20 is firmly connected to the slot 12 of the rotor core 10, ensuring the reliability of the connection between the fixing member 20 and the slot 12. The magnet 30 is clamped between the fixing parts 22 of two adjacent fixing members 20. The reliable connection between the snap-fit ​​part 21 and the slot 12 ensures the reliability of the connection between the magnet 30 and the fixing member 20. The rotor core 10 includes an upper surface and a lower surface, which are spaced apart along the thickness direction of the rotor core 10. The fixing members are flush with the upper and lower surfaces at both ends along the thickness direction of the rotor core 10, respectively. When the fixing member 20 is heated, both ends of the fixing member 20 extend along the thickness of the rotor core 10 towards both ends of the slot 12 to the outside of the upper and lower surfaces of the rotor core 10. This prevents the fixing member 20 from applying axial force to the silicon steel sheets 11 at both ends of the rotor core 10 when heated, preventing the silicon steel sheets 11 at both ends of the rotor core 10 from loosening, improving the firmness and reliability of the rotor core 10, and ensuring the normal operation of the rotor core 10. Compared with the prior art, in this embodiment of the utility model, one end of the rotor core 10 is not provided with a plastic retaining ring, and the magnet 30 can be installed from either end of the rotor core 10 between two adjacent fixing parts 20, thereby improving the installation flexibility of the magnet 30. In addition, the absence of a retaining ring can also improve the axial heat dissipation of the magnet 30 and improve the heat resistance of the rotor 100 and the motor.

[0047] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A rotor characterized by, The rotor comprises: a rotating shaft; a rotor core having a through hole therethrough, the rotor core being formed by laminating a plurality of silicon steel sheets, the rotating shaft being disposed in the through hole and fixed to the rotor core, an outer side of the rotor core being inwardly recessed to form a plurality of clamping grooves which are spaced apart and extend through the rotor core along a thickness direction of the rotor core; a fixing member comprising a clamping portion clamped in the clamping grooves and a fixing portion extending from the clamping portion and protruding outwardly from the outer side of the rotor core, the fixing member being the same in number as the clamping grooves, the rotor core comprising an upper surface and a lower surface which are oppositely arranged along the thickness direction, the fixing member being flush with the upper surface and the lower surface at both ends along the thickness direction, respectively; a magnetic steel clamped between the fixing portions of two adjacent fixing members.

2. The rotor of claim 1, wherein The rotor core is formed by laminating a plurality of first silicon steel sheets and at least one second silicon steel sheet, an outer side of the first silicon steel sheet being inwardly recessed to form a plurality of first recessed grooves which are spaced apart, an outer side of the second silicon steel sheet being inwardly recessed to form a plurality of second recessed grooves which are spaced apart, the first recessed grooves being the same in number as the second recessed grooves and arranged one by one along the thickness direction to form the clamping grooves, the clamping portion being in concave-convex cooperation with the first recessed grooves and the clamping portion being in concave-convex cooperation with the second recessed grooves.

3. The rotor of claim 2, wherein The first recessed grooves have a depth greater than that of the second recessed grooves.

4. The rotor of claim 2, wherein The first recessed grooves have a width greater than that of the second recessed grooves.

5. The rotor of claim 2, wherein The first recessed grooves have oppositely arranged bottom ends and opening ends, the width of the bottom ends of the first recessed grooves being greater than that of the opening ends of the first recessed grooves.

6. The rotor of claim 5, wherein The first recessed grooves comprise a tapered portion and a rectangular portion, the tapered portion gradually decreasing in width along a direction away from the center of the rotor core, the rectangular portion being in communication with one end of the tapered portion away from the center of the rotor core and extending to the edge of the first silicon steel sheet to form the opening end.

7. The rotor of claim 2, wherein An outer side of the clamping portion is inwardly recessed to form a recess, the recess being in concave-convex cooperation with the second recessed grooves.

8. The rotor of claim 7, wherein The recess is formed by inwardly recessing an outer side of the clamping portion along a direction from the center of the rotor core to the edge of the rotor core, and / or the recess is formed by inwardly recessing an outer side of the clamping portion along a circumferential direction of the rotor core.

9. The rotor of claim 2, wherein The second silicon steel sheet is clamped between two adjacent first silicon steel sheets.

10. An electric machine characterized by The motor comprises the rotor according to claim 1.

Images