Damping rotor assembly and electric machine

Abstract

The application discloses a damping rotor assembly and a motor. The damping rotor assembly comprises a rotor core, a permanent magnet, a rotating shaft, a structural member, a first end damping member and a second end damping member. The rotor core has a magnet slot and a rotating shaft hole. The permanent magnet is arranged in the magnet slot. The rotating shaft is arranged in the rotating shaft hole and has a gap between the rotating shaft and the rotor core. The first end and the second end of the rotating shaft extend out of the rotating shaft hole. The first end damping member is arranged on the first end surface of the rotor core and connected with the rotor core. The first end damping member is directly matched with the rotating shaft or matched with the rotating shaft through a first transmission member arranged in the first end damping member. The structural member comprises an end plate and a connecting strip. The end plate is arranged on the second end surface of the permanent magnet. The first end of the connecting strip is connected with the first end damping member through the rotor core. The second end of the connecting strip is connected with the end plate. The damping rotor assembly can increase the filling amount of the damping member, sufficiently improve the damping performance, reduce the vibration noise and has high reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular, to a rotor assembly and an electric machine with the rotor. BACKGROUND

[0002] With the increase of power density of electric machines, the energy density of electric machines is improved, and the magnetic field of electric machines tends to be deeply saturated, resulting in the increase of electromagnetic noise. In the related art, in order to reduce electromagnetic vibration and noise caused by torque fluctuation during operation of the electric machine, a damping material is usually filled between the rotor core and the shaft or the shaft sleeve to absorb electromagnetic force waves, so as to reduce the noise of the electric machine and achieve damping. However, by filling the damping material between the rotor core and the shaft or the shaft sleeve, the effect of noise reduction and damping is not good, and needs to be improved. SUMMARY

[0003] The present application is based on the fact and problem discovered and realized by the inventors:

[0004] In the related art, the damping rotor assembly includes a permanent magnet, an outer core, a shaft, an injection molding body and a damping ring. The injection molding body includes an upper end plate, a lower end plate and a plastic encapsulation connecting part connecting the upper end plate and the lower end plate. An annular boss is axially protruded on the upper end plate and / or the lower end plate. The inner core is installed on the shaft and embedded in the groove of the annular boss. The damping ring is arranged between the inner core and the inner wall of the groove. On the one hand, due to the limited gap between the inner core and the inner wall of the groove, the material amount of the damping part is limited, and the noise reduction and damping effect is poor. On the other hand, the injection molding part and the damping ring are made of different materials, the damping ring at the end of the outer core has no connection, the boundary surface of the injection molding part and the damping ring is easy to have a gap, the reliability is low, and the damping of the injection molding part is small, and the suppression effect of electromagnetic vibration noise is not obvious.

[0005] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0006] To this end, the embodiments of the present application propose a rotor assembly capable of improving the material amount of the damping part and the noise reduction and damping effect.

[0007] The embodiments of the present application also propose an electric machine.

[0008] The damping rotor assembly according to the first aspect of the embodiments of the present application comprises a rotor core, a permanent magnet, a shaft, a structure, a first end damping member and a second end damping member. The rotor core has a magnet slot and a shaft hole; the permanent magnet is arranged in the magnet slot; the shaft is arranged in the shaft hole and has a gap with the rotor core, the first end and the second end of the shaft protrude from the shaft hole; the first end damping member is arranged on the first end surface of the rotor core and connected with the rotor core, the first end damping member directly cooperates with the shaft or cooperates with the shaft through a first transmission member arranged in the first end damping member; the structure comprises an end plate and a connecting strip, the end plate is arranged on the second end surface of the rotor core, the first end of the connecting strip protrudes into the rotor core towards the first end damping member, and the second end of the connecting strip is connected with the end plate; the second end damping member is arranged in the end plate, and the second end damping member directly cooperates with the shaft or cooperates with the shaft through a second transmission member arranged in the second end damping member.

[0009] The damping rotor assembly according to the embodiments of the present application can increase the filling amount of the damping members by arranging the structure connected with the rotor core and having the end plate and the connecting strip, arranging the second end damping member in the end plate arranged on the second end surface of the rotor core, and arranging the first end damping member on the first end surface of the rotor core. For example, the first end damping member can be consistent with the outer diameter of the rotor core, and the thickness can be increased without limitation, thereby sufficiently improving the damping performance and reducing the vibration noise. In addition, the structure can protect the rotor core and improve the reliability of the connection between the first end damping member and the rotor core.

[0010] In some embodiments, when the first end damping member cooperates with the shaft through the first transmission member, a part of the first end damping member also directly cooperates with the shaft.

[0011] In some embodiments, when the first end damping member cooperates with the shaft through the first transmission member, the minimum gap between the first transmission member and the rotor core in the axial direction of the rotor core is greater than or equal to 0.3 mm.

[0012] In some embodiments, when the second end damping member cooperates with the shaft through the second transmission member, a part of the second end damping member also directly cooperates with the shaft.

[0013] In some embodiments, the material of at least one of the first end damping member and the second end damping member is a viscoelastic material.

[0014] In some embodiments, the viscoelastic material has a loss factor of 0.15 or greater, and a Shore hardness of 20 degrees to 80 degrees.

[0015] In some embodiments, the rotor core has axial through holes between adjacent magnet slots, and the connecting bars include intermediate connecting bars in the axial through holes.

[0016] In some embodiments, the rotor core has axial through holes between adjacent magnet slots, and the connecting bars include intermediate connecting bars in the axial through holes.

[0017] In some embodiments, the rotor core has axial through holes between adjacent magnet slots, and the connecting bars include intermediate connecting bars in the axial through holes.

[0018] In some embodiments, the end plate has radial protrusions and radial grooves between the radial protrusions on an inner circumferential surface thereof, the second end damping member has second damping radial outer protrusions and second damping radial outer open grooves between the second damping radial outer protrusions on an outer circumferential wall thereof, the radial protrusions of the end plate are fitted into the second damping radial outer open grooves, and the second damping radial outer protrusions are fitted into the radial grooves of the end plate.

[0019] In some embodiments, the first transmission member has first transmission radial protrusions and first transmission radial open grooves formed between the first transmission radial protrusions on an outer circumferential surface thereof, the first end damping member has first damping radial inner protrusions and first damping radial inner open grooves between the first damping radial inner protrusions on an inner circumferential wall thereof, the first damping radial inner protrusions are fitted into the first transmission radial open grooves, and the first transmission radial protrusions are fitted into the first damping radial inner open grooves.

[0020] In some embodiments, the second transmission member has second transmission radial protrusions and second transmission radial open grooves formed between the second transmission radial protrusions on an outer circumferential surface thereof, the second end damping member has second damping radial inner protrusions and second damping radial inner open grooves between the second damping radial inner protrusions on an inner circumferential wall thereof, the second damping radial inner protrusions are fitted into the second transmission radial open grooves, and the second transmission radial protrusions are fitted into the second damping radial inner open grooves.

[0021] In some embodiments, the rotor core is formed by stacking a plurality of half-continuous bridge stamping pieces in an axial direction of the rotor core, and in adjacent half-continuous bridge stamping pieces, one half-continuous bridge stamping piece is rotated by one magnetic pole in a circumferential direction of the rotor core relative to another half-continuous bridge stamping piece.

[0022] In some embodiments, the first transmission member and the second transmission member and the structural member are made of metal, resin or plastic.

[0023] The motor according to the embodiment of the second aspect of the present application includes the damping rotor assembly according to any one of the above embodiments, and by using the damping rotor assembly, the motor has small operation vibration and low noise. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective view of a damping rotor assembly according to an embodiment of the present application.

[0025] Figure 2 is Figure 1 is a partial structural view of the damping rotor assembly shown in

[0026] Figure 3 is Figure 1 is a partial structural view of the damping rotor assembly shown in

[0027] Figure 4 is a structural schematic view of a first transmission member of a damping rotor assembly according to an embodiment of the present application.

[0028] Figure 5 is a structural schematic view of a second transmission member of a damping rotor assembly according to an embodiment of the present application.

[0029] Figure 6 is a perspective view of a damping rotor assembly according to another embodiment of the present application.

[0030] Figure 7 is Figure 6 is a partial structural view of the damping rotor assembly shown in

[0031] Figure 8 is Figure 6 is a partial structural view of the damping rotor assembly shown in

[0032] Figure 9 is a schematic view of a half-continuous bridge lamination of a damping rotor assembly according to an embodiment of the present application.

[0033] REFERENCE NUMERALS:

[0034] Damping rotor assembly 100;

[0035] Rotor core 10; shaft hole 101; magnet slot 102; axial through hole 103; half-continuous bridge lamination 120; lamination body portion 111; outer magnetic bridge 112; inner magnetic bridge 113; magnetic pole 114; protrusion 115;

[0036] Permanent magnet 20;

[0037] Shaft 30;

[0038] Structural component 40; end plate 42; radial protrusion 421; connecting strip 43; outer connecting strip 430; intermediate connecting strip 431; inner connecting strip 432; central connecting cylinder 433;

[0039] First transmission component 51; First transmission radial protrusion 510; First transmission radial opening groove 511;

[0040] Second transmission component 52; Second transmission radial protrusion 520; Second transmission radial opening groove 521;

[0041] First end damping element 61; first damping radial inner opening groove 615; first damping radial inner protrusion 616.

[0042] Second end damping element 62; second damping radial outer opening groove 623; second damping radial outer protrusion 624; second damping radial inner opening groove 625; second damping radial inner protrusion 626. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] like Figures 1-9 As shown, the vibration damping rotor assembly 100 according to an embodiment of the present invention includes a rotor core 10, a permanent magnet 20, a rotating shaft 30, a structural component 40, a first end damping component 61, and a second end damping component 62.

[0045] Specifically, the rotor core 10 has a shaft hole 101 and a magnet slot 102. For example... Figure 1 and Figure 6 As shown, the shaft hole 101 is located at approximately the center of the rotor core 10 and along the axial direction of the rotor core 10. Figure 1 and Figure 2 The rotor core 10 is oriented horizontally (left to right). Multiple magnet slots 102 are provided, and the multiple magnet slots 102 are evenly spaced along the circumference of the rotor core 10.

[0046] The permanent magnet 20 is disposed within the magnet slot 102. For example... Figure 1 and Figure 2 As shown, there are multiple permanent magnets 20, which are installed in the magnet slots 102.

[0047] The rotating shaft 30 is disposed within the rotating shaft hole 101 and there is a gap between the rotating shaft 30 and the rotor core 10. The first end of the rotating shaft 30 ( Figure 2 The left end of the central shaft 30) and the second end ( Figure 2 The right end of the central shaft 30 extends from the shaft hole 101. For example... Figure 1 andFigure 2 As shown, the axial direction of the rotating shaft 30 is roughly consistent with the axial direction of the rotor core 10.

[0048] The first end damping member 61 is provided on the first end face of the rotor core 10. Figure 1 The first end damping member 61 is located on the left end face of the rotor core 10 and connected to the rotor core 10. It directly engages with the rotating shaft 30 or engages with the rotating shaft 30 via a first transmission member 51 located within the first end damping member 61. In other words, because there is a gap between the inner circumferential wall of the rotating shaft hole 101 of the rotor core 10 and the rotating shaft 30, the rotor core 10 does not directly drive the rotating shaft 30, but rather drives the rotating shaft 30 through the first end damping member 61. Specifically, the first end damping member 61 can directly drive the rotating shaft 30 or drive the rotating shaft 30 through the first transmission member 51.

[0049] like Figure 1 and Figure 6 As shown, the first end damping member 61 is connected to the left end face of the rotor core 10, and the rotating shaft 30 passes through the rotor core 10 and the first end damping member 61 in a left-right direction. The first end damping member 61 directly cooperates with the rotating shaft 30, as shown... Figure 6 As shown in the figure. Therefore, when the rotor core 10 rotates, it drives the first end damping member 61 to rotate, and the first end damping member 61 then drives the rotating shaft 30 to rotate. Alternatively, as shown in the figure... Figure 1 As shown, the first transmission member 51 is disposed within the first end damping member 61, and the first transmission member 51 cooperates with the rotating shaft 30. In other words, the first end damping member 61 cooperates with the rotating shaft 30 through the first transmission member 51. Thus, when the rotor core 10 rotates, it drives the first end damping member 61 to rotate, and the first transmission member 51 rotates together with the first end damping member 61, thereby driving the rotating shaft 30 to rotate.

[0050] Structural component 40 includes an end plate 42 and a connecting strip 43, the end plate 42 being disposed on the second end face of the rotor core 10. Figure 1 On the right end face of the rotor core 10, the first end of the connecting bar 43 ( Figure 1 The left end of the connecting strip 43 extends into the rotor core 10 towards the first end damping member 61, and the second end of the connecting strip 43 is connected to the end plate 42. Thus, the connecting strip improves the reliability of the connection between the first end damping member and the first end face of the rotor core, and the end plate 42, connected to the end of the rotor core 10, forms sufficient space between the end plate 42 and the rotor core 10 to fill the damping member, thereby improving vibration damping performance.

[0051] The second end component vibration damper 62 is located inside the end plate 42, and the second end vibration damper 62 directly engages with the rotating shaft 30. For example... Figure 7As shown, the connecting strip 43 passes through the rotor core 10 to connect the rotor core 10 with the structural member 40, the second end damping member 62 is sleeved on the rotating shaft 30, the rotor core 10 can drive the structural member 40 to rotate, and the structural member 40 can directly drive the rotating shaft 30 to rotate through the second end damping member 62.

[0052] Alternatively, the second transmission member 52 is arranged in the second end damping member 62, and the second transmission member 52 cooperates with the rotating shaft 30. In other words, the second end damping member 62 cooperates with the rotating shaft 30 through the second transmission member 52. As shown in FIG. 2, the second end damping member 62 is arranged in the first inner hole of the end plate 42, and the second transmission member 52 is arranged in the second inner hole of the second end damping member 62. Figure 1 and Figure 2 As shown, the connecting strip 43 extends into the rotor core 10, the end plate 42 has a first inner hole, the second end damping member 62 is arranged in the first inner hole, the second end damping member 62 has a second inner hole, the second transmission member 52 is arranged in the second inner hole, the second transmission member 52 is sleeved on the rotating shaft 30, the rotor core 10 drives the structural member 40 to rotate, the structural member 40 drives the second end damping member 62 to rotate, and the second end damping member 62 drives the rotating shaft 30 to rotate through the second transmission member 52.

[0053] According to the damping rotor assembly of the embodiment of the present application, the structural member connected with the rotor core and having the end plate and the connecting strip is arranged, the second end damping member is arranged in the end plate connected with the second end surface of the rotor core, the first end damping member is arranged on the first end surface of the rotor core, the filling amount of the damping member can be increased, for example, the first end damping member can be consistent with the outer diameter of the rotor core, and the thickness can be increased without limitation, thereby sufficiently improving the damping performance and reducing the vibration noise. In addition, the structural member can protect the rotor core and improve the reliability of the connection between the first end damping member and the rotor core; there is no problem of different thermal expansion coefficients, the reliability of the rotor assembly is improved, and only the damping member needs to be arranged in the production process, the preparation process is simple, and the failure rate of mass production is reduced.

[0054] In some embodiments, at least one of the first end damping member 61 and the second end damping member 62 is made of a viscoelastic material. Specifically, both the first end damping member 61 and the second end damping member 62 are made of a viscoelastic material. By designing a viscoelastic material on the end surface of the rotor core, the rotor damping ratio can be greatly improved.

[0055] In some embodiments, the loss factor of the viscoelastic material is greater than or equal to 0.15, thereby ensuring that the electromagnetic force wave is effectively absorbed and attenuated when the motor rotor is running.

[0056] Further, the Shore hardness of the viscoelastic material is 20 degrees to 80 degrees, thereby improving the manufacturability of the motor. For example, the Shore hardness is 30 degrees, 40 degrees, or 50 degrees.

[0057] In some embodiments, when the first end damper 61 is engaged with the rotating shaft 30 through the first transmission member 51, a portion of the first end damper 61 is also directly engaged with the rotating shaft 30. In other words, while the first transmission member 51 is engaged with the rotating shaft 30, a portion of the first end damper 61 fills the gap between the first transmission member 51 and the rotor core 10, and this portion is directly engaged with the rotating shaft 30. In this way, the filling amount of the first end damper can be increased, and the damping performance can be improved.

[0058] The rotating shaft 30 penetrates a portion of the first end damper 61 and the first transmission member 51 in the left-right direction, and the rotating shaft 30 is directly engaged with the portion of the first end damper 61 and the first transmission member 51. When the rotor core 10 drives the structure 40 to rotate, the structure 40 drives the first end damper 61 to rotate, and thus the rotating shaft 30 is driven to rotate by the portion of the first end damper 61 directly engaged with the rotating shaft 30 and the first transmission member 51.

[0059] In some embodiments, when the first end damper 61 is engaged with the rotating shaft 30 through the first transmission member 51, the minimum gap between the first transmission member 51 and the rotor core 10 in the axial direction of the rotor core 10 is greater than or equal to 0.3 mm. As shown in FIG. 6, the hole in the first end damper 61 in which the first transmission member 51 is installed does not penetrate the first end damper 61. It can be understood that the present application is not limited thereto. Figure 1

[0060] In some embodiments, when the second end damper 62 is engaged with the rotating shaft 30 through the second transmission member 52, a portion of the second end damper 62 is also directly engaged with the rotating shaft 30. In other words, while the second transmission member 52 is engaged with the rotating shaft 30, a portion of the second end damper 62 fills the gap between the second transmission member 52 and the rotor core 10, and this portion is directly engaged with the rotating shaft 30. In this way, the filling amount of the second end damper can be increased, and the damping performance can be improved.

[0061] The rotating shaft 30 penetrates a portion of the second end damper 62 and the second transmission member 52 in the left-right direction, and the rotating shaft 30 is directly engaged with the portion of the second end damper 62 and the second transmission member 52. When the rotor core 10 drives the structure 40 to rotate, the structure 40 drives the second end damper 62 to rotate, and thus the rotating shaft 30 is driven to rotate by the portion of the second end damper 62 directly engaged with the rotating shaft 30 and the second transmission member 52.

[0062] In some embodiments, when the second end damper 62 is engaged with the rotating shaft 30 through the second transmission member 52, the minimum gap between the second transmission member 52 and the rotor core 10 in the axial direction of the rotor core 10 is greater than or equal to 0.3 mm. As shown in FIG. 10, the hole in the second end damper 62 in which the second transmission member 52 is installed does not penetrate the second end damper 62. It can be understood that the present application is not limited thereto. Figure 1 ​As shown, the hole for mounting the second transmission member 52 on the second end damper 62 does not penetrate the second end damper 62. It can be understood that the present application is not limited thereto, and the hole for mounting the second transmission member 52 on the second end damper 62 can penetrate the second end damper 62, as shown in Figure 6 As shown.

[0063] In some embodiments, the material of at least one of the first end damper 61 and the second end damper 62 is a viscoelastic material. The viscoelastic material can be rubber, thermoplastic material, etc. The application can greatly absorb the energy generated by resonance by using the viscoelastic material, achieving the damping effect.

[0064] In some embodiments, the loss factor of the viscoelastic material is greater than or equal to 0.15, so as to ensure that the electromagnetic force wave is effectively absorbed and attenuated when the motor rotor is running.

[0065] Further, the Shore hardness of the viscoelastic material is 20 degrees-80 degrees, so as to improve the manufacturability of the motor. For example, the Shore hardness is 30 degrees, 40 degrees, 50 degrees.

[0066] In some embodiments, as shown in Figure 1 The rotor core 10 has an axial through hole 103 between adjacent magnet slots 102, and the connecting strip 43 includes a middle connecting strip 431 passing through the axial through hole 103. In other words, the middle connecting strip 431 can pass through the axial through hole 103 to connect the rotor core 10 and the structural member 40. In this way, the reliability of the connection between the rotor core and the structural member can be improved by using the middle connecting strip.

[0067] Specifically, as shown in Figure 1 The axial through hole 103 is a plurality of axial through holes 103 arranged along the circumference of the rotor core 10. The middle connecting strip 431 is a plurality of middle connecting strips 431 corresponding to the plurality of axial through holes 103. In this way, the reliability of the connection between the rotor core and the structural member is further improved.

[0068] In some embodiments, as shown in Figure 1 and Figure 9 The outer magnetic bridge 112 of the rotor core 10 has an opening, and the inner surface of the permanent magnet 20 and the inner bottom surface of the magnet slot 102 have a gap (not shown), and the connecting strip 43 includes an outer connecting strip 430 located in the opening and an inner connecting strip 432 located in the gap.

[0069] As shown in Figure 1 and Figure 9 The outer magnetic bridge 112 of the rotor core 10 has a plurality of openings spaced along the circumference, and the plurality of outer connecting strips 430 correspond to the plurality of openings one by one, and any one outer connecting strip 430 is adapted to close the corresponding opening. In this way, the reliability of the connection between the structural member and the rotor core can be improved by using the outer connecting strip, and the opening can be closed by the outer connecting strip, so that the permanent magnet is stable and not easy to slip off.

[0070] As shown in Figure 1 , a plurality of magnet grooves 102 are uniformly spaced along the circumference of the rotor core 10, and a plurality of permanent magnets 20 are correspondingly fitted in the plurality of magnet grooves 102. A gap is formed between the inner surface of any one of the permanent magnets 20 and the inner bottom surface of the corresponding magnet groove 102, and a plurality of inner connecting strips 432 are correspondingly filled in the plurality of gaps.

[0071] Thus, the plurality of inner connecting strips can not only increase the connecting structure between the structural member and the rotor core to improve the connecting reliability, but also fill the gap between the inner surface of the permanent magnet and the inner bottom surface of the magnet groove with the inner connecting strips to avoid the permanent magnet being suspended and improve the stability of the permanent magnet assembly.

[0072] In some embodiments, as shown in Figure 1 , the structural member 40 further comprises a central connecting cylinder portion 433 fitted between the inner wall of the shaft hole 101 and the shaft 30. As shown in Figure 1 , the central connecting cylinder portion 433 is consistent with the direction of the shaft 30, and the central connecting cylinder portion 433 is adapted to be accommodated in the shaft hole 101 and surround the outer circumference of the shaft 30. Thus, the cooperation between the structural member and the rotor core can be guided by the central connecting cylinder portion, which facilitates the accurate positioning of the cooperation position, and the gap between the inner wall of the central connecting cylinder portion and the shaft can be filled with a damping member to further improve the damping performance of the damping rotor assembly.

[0073] In some embodiments, as shown in Figure 2 , the inner circumferential surface of the end plate 42 is provided with radial protrusions 421 and radial recesses (not shown) located between the radial protrusions 421. As shown in Figure 2 , the end plate 42 has a first inner hole passing through left and right, and the inner circumferential surface of the first inner hole is provided with a plurality of radial protrusions 421 spaced along the circumference of the end plate 42, and a radial recess is formed between any two adjacent radial protrusions 421.

[0074] The outer circumferential surface of the first transmission member 51 is provided with first transmission radial protrusions 510 and first transmission radial open grooves 511 formed between the first transmission radial protrusions 510.

[0075] The inner circumferential wall of the first end damping member 61 is provided with first damping radial inner protrusions 616 and first damping radial inner open grooves 615 located between the first damping radial inner protrusions 616, the first damping radial inner protrusions 616 are fitted in the first transmission radial open grooves 511, and the first transmission radial protrusions 510 are fitted in the first damping radial inner open grooves 615.

[0076] As shown in Figure 1 , Figure 3 , and Figure 4As shown, the outer circumferential surface of the first transmission member 51 is provided with a plurality of first transmission radial protrusions 510 arranged circumferentially at intervals, and a first transmission radial opening slot 511 is formed between any two adjacent first transmission radial protrusions 510.

[0077] The first end damping member 61 has an inner hole penetrating in the left-right direction, and the first transmission member 51 is located in the space defined by the inner hole. A plurality of first damping radial inner protrusions 616 are arranged circumferentially at intervals on the inner circumferential wall of the inner hole, and a first damping radial inner opening slot 615 is formed between any two adjacent first damping radial inner protrusions 616.

[0078] Specifically, as shown, Figure 3 when the first transmission member 51 is fitted with the first end damping member 61, the plurality of first transmission radial protrusions 510 and the plurality of first damping radial inner opening slots 615 are one-to-one matched, any one of the first transmission radial protrusions 510 is embedded in the corresponding first damping radial inner opening slot 615, and the plurality of first transmission radial opening slots 511 and the plurality of first damping radial inner protrusions 616 are one-to-one matched, any one of the first damping radial inner protrusions 616 is embedded in the corresponding first transmission radial opening slot 511.

[0079] Therefore, by using the cooperation of the plurality of first damping radial inner protrusions and the plurality of first transmission radial opening slots, the cooperation of the plurality of first transmission radial protrusions and the plurality of first damping radial inner opening slots, the first transmission member and the first end damping member can be tightly matched, and the relative rotation of the first transmission member and the first end damping member can be prevented. There is no extra connection structure between the first transmission member and the first end damping member, which is convenient to disassemble and assemble and has high assembly efficiency.

[0080] As shown, Figure 1 , Figure 2 and Figure 5 the outer circumferential surface of the second transmission member 52 is provided with a second transmission radial protrusion 520 and a second transmission radial opening slot 521 formed between the second transmission radial protrusions 520.

[0081] The inner circumferential wall of the second end damping member 62 is provided with a second damping radial inner protrusion 626 and a second damping radial inner opening slot 625 located between the second damping radial inner protrusions 626.

[0082] The second damping radial inner protrusion 626 is fitted in the second transmission radial opening slot 521, and the second transmission radial protrusion 520 is fitted in the second damping radial inner opening slot 625. It can be understood that the cooperation of the second transmission member 52 and the second end damping member 62 is the same as the cooperation of the first end damping member 61 and the first transmission member 51, which will not be described here.

[0083] The outer circumferential wall of the second end damping member 62 is provided with a second damping radial outer protrusion 624 and a second damping radial outer open slot 623 between the second damping radial outer protrusions 624, and the radial protrusion 421 of the end plate 42 is matched in the second damping radial outer open slot 623, and the second damping radial outer protrusion 624 is matched in the radial recess of the end plate 42.

[0084] As shown in Figure 1 and Figure 2 , the outer circumferential wall of the second end damping member 62 is provided with a plurality of second damping radial outer protrusions 624 arranged in a circumferential direction of the second end damping member 62, and a second damping radial outer open slot 623 is formed between any two adjacent second damping radial outer protrusions 624.

[0085] Specifically, as shown in Figure 2 , when the second end damping member 62 is matched with the end plate 42, the second end damping member 62 is arranged in the hole inner space of the first inner hole, a plurality of radial protrusions 421 are matched with a plurality of second damping radial outer open slots 623 one by one, and any one radial protrusion 421 is embedded in the corresponding second damping radial outer open slot 623, a plurality of second damping radial outer protrusions 624 are matched with a plurality of radial recesses one by one, and any one second damping radial outer protrusion 624 is embedded in the corresponding radial recess.

[0086] Therefore, the second end damping member and the end plate are stable in assembly, convenient in disassembly, and the second end damping member and the structural member will not rotate relative to each other, and the damping rotor assembly has high operation reliability.

[0087] In some embodiments, as shown in Figure 1 and Figure 9 , the rotor core 10 is at least stacked by a plurality of half-bridge punched sheets 120 along the axial direction of the rotor core 10. Among the adjacent half-bridge punched sheets 120, one half-bridge punched sheet 120 is rotated by one magnetic pole 114 relative to the other half-bridge punched sheet 120 along the circumferential direction of the rotor core 10. Therefore, the inner magnetic bridge 113 of the rotor core 10 forms an alternating connection and disconnection structure in the axial direction, which improves the electromagnetic performance of the motor, thereby reducing energy consumption.

[0088] Specifically, as shown in Figure 1 and Figure 9 , the rotor punched sheet includes a punched sheet body part 111, an outer magnetic bridge, an inner magnetic bridge 113, and a magnetic pole 114, a plurality of magnetic poles 114 are arranged in a circumferential direction of the rotor core 10, and at least part of the magnetic poles 114 are connected with the punched sheet body part 111 through the inner magnetic bridge 113. A plurality of protrusions 115 are arranged in the outer circumferential direction of the punched sheet body part 111, one protrusion 115 is arranged between adjacent inner magnetic bridges 113, and the outer magnetic bridge of the half-bridge punched sheet 110 is open.

[0089] As shown in Figure 9As shown, among the multiple magnetic poles 114 of the semi-bridge lamination 120, a portion of the magnetic poles 114 are connected to the lamination body portion 111 via an inner magnetic bridge 113, while another portion of the magnetic poles 114 are radially spaced from the lamination body portion 111 in the rotor core 10. The magnetic poles 114 and the other portion of the magnetic poles 114 are arranged alternately along the circumference of the rotor core 10. In adjacent semi-bridge laminations 120 in the middle portion, one semi-bridge lamination 120 rotates relative to the other semi-bridge lamination 120 by one magnetic pole 114 along the circumference of the rotor core 10.

[0090] In some embodiments, the first transmission member 51, the second transmission member 52, and the structural member 40 are made of metal, resin, or plastic. The transmission members and structural members have high rigidity, ensuring the reliability and sensitivity of the transmission and improving the structural strength of the vibration-damping rotor assembly.

[0091] The following is a reference appendix. Figures 1-9 The present invention describes a vibration damping rotor assembly 100 according to some specific exemplary embodiments.

[0092] like Figures 1-9 As shown, the vibration damping rotor assembly 100 includes a rotor core 10, multiple permanent magnets 20, a rotating shaft 30, a structural component 40, a first transmission component 51, a second transmission component 52, a first end damping component 61, and a second end damping component 62.

[0093] The rotor core 10 has a shaft hole 101, multiple magnet slots 102, and multiple axial through holes 103. The shaft hole 101 is located at approximately the center of the rotor core 10 and extends through the rotor core 10 axially. The multiple magnet slots 102 are evenly spaced around the shaft hole 101 along the circumference of the rotor core 10. An axial through hole 103 is provided between adjacent magnet slots 102.

[0094] The rotor core 10 is formed by stacking multiple half-bridge laminations 120 along the axial direction of the rotor core 10. The outer magnetic bridges 112 of the half-bridge laminations 120 are disconnected between adjacent magnetic poles 114. Among the multiple magnetic poles 114 of the half-bridge laminations 120, a portion of the magnetic poles 114 are connected to the lamination body portion 111 through an inner magnetic bridge 113, while another portion of the magnetic poles 114 are radially spaced from the lamination body portion 111 of the rotor core 10. A portion of the magnetic poles 114 and the other portion of the magnetic poles 114 are arranged alternately along the circumference of the rotor core 10. In the middle portion of adjacent half-bridge laminations 120, one half-bridge lamination 120 rotates relative to the other half-bridge lamination 120 by one magnetic pole 114 along the circumference of the rotor core 10.

[0095] Multiple permanent magnets 20 are respectively disposed in multiple magnet slots 102, so that the multiple permanent magnets 20 are arranged at intervals along the circumference of the rotor core 10. There is a gap between the inner surface of each permanent magnet 20 and the inner bottom surface of the corresponding magnet slot 102.

[0096] The rotation shaft 30 is arranged in the rotation shaft hole 101 of the rotor core 10 in the axial direction, and has a gap between the rotation shaft 30 and the rotor core 10.

[0097] The structure 40 includes a center connecting cylinder 433, an end plate 42, and connecting strips 43 arranged on the end plate 42. The center connecting cylinder 433 is arranged in the axial direction of the rotation shaft 30 and is adapted to be accommodated in the rotation shaft hole 101 and surround the outer periphery of the rotation shaft 30. The end plate 42 is connected to the right end surface of the rotor core 10, and the connecting strips 43 include a plurality of inner connecting strips 432, a plurality of middle connecting strips 431, and a plurality of outer connecting strips 430. The plurality of inner connecting strips 432 correspond to the gaps between the inner surfaces of the plurality of permanent magnets 20 and the bottom surfaces of the plurality of corresponding magnet grooves 102.

[0098] The plurality of middle connecting strips 431 correspond to the plurality of axial through holes 103, and the plurality of outer connecting strips 430 correspond to the openings of the plurality of magnet grooves 102 and close the openings. The first end damping member 61 is connected to the left end surface of the rotor core 10, and the left ends of the plurality of inner connecting strips 432, the plurality of middle connecting strips 431, and the plurality of outer connecting strips 430 are all connected to the first end damping member 61 after passing through the rotor core 10.

[0099] The first end damping member 61 is connected to the left end surface of the rotor core 10, and has an inner hole. The first transmission member 51 is arranged in the inner hole space, and the inner circumferential surface of the inner hole is provided with a plurality of first damping radial inner protrusions 616 arranged at intervals along the circumferential direction of the first end damping member 61. Between any two adjacent first damping radial inner protrusions 616, a first damping radial inner opening groove 615 is formed.

[0100] The first transmission member 51 is sleeved on the rotation shaft 30, and the outer wall surface of the first transmission member 51 is provided with a plurality of first transmission radial protrusions 510 arranged at intervals along the circumferential direction of the first transmission member 51. Between any two adjacent first transmission radial protrusions 510, a first transmission radial opening groove 511 is formed.

[0101] When the first transmission member 51 is fitted with the first end damping member 61, the plurality of first transmission radial protrusions 510 and the plurality of first damping radial inner opening grooves 615 are one-to-one corresponding and matched, and any one of the first transmission radial protrusions 510 is embedded in the corresponding first damping radial inner opening groove 615. The plurality of first damping radial inner protrusions 616 and the plurality of first transmission radial opening grooves 511 are one-to-one corresponding and matched, and any one of the first damping radial inner protrusions 616 is embedded in the corresponding first transmission radial opening groove 511.

[0102] The end plate 42 has a first inner hole, and an inner circumferential surface of the first inner hole is provided with a plurality of radial protrusions 421 arranged at intervals in a circumferential direction of the end plate 42, and a radial groove is formed between any two adjacent radial protrusions 421. The second end damping member 62 is arranged in the first inner hole, and an outer wall surface of the second end damping member 62 is provided with a plurality of damping radial outer protrusions arranged at intervals in a circumferential direction of the first end damping member 61, and a second damping radial outer opening groove 623 is formed between any two adjacent second damping radial outer protrusions 624.

[0103] When the second end damping member 62 is matched with the end plate 42, the second end damping member 62 is arranged in a hole space of the first inner hole, the plurality of radial protrusions 421 and the plurality of second damping radial outer opening grooves 623 are matched one by one, and any one radial protrusion 421 is embedded in the corresponding second damping radial outer opening groove 623, the plurality of second damping radial outer protrusions 624 and the plurality of radial grooves are matched one by one, and any one second damping radial outer protrusion 624 is embedded in the corresponding radial groove.

[0104] The second transmission member 52 is sleeved on the rotating shaft 30, the second end damping member 62 has a second inner hole, and an inner circumferential surface of the second inner hole is provided with a plurality of second damping radial inner protrusions 626 arranged at intervals in a circumferential direction of the second end damping member 62, and a second damping radial inner opening groove 625 is formed between any two adjacent second damping radial inner protrusions 626. The second transmission member 52 is arranged in a hole space of the second inner hole, and an outer wall surface of the second transmission member 52 is provided with a plurality of second transmission radial protrusions 520 arranged at intervals in a circumferential direction of the second transmission member 52, and a second transmission radial opening groove 521 is formed between any two second transmission radial protrusions 520.

[0105] When the second end damping member 62 is matched with the second transmission member 52, the plurality of second damping radial inner protrusions 626 and the plurality of second transmission radial opening grooves 521 are matched one by one, and any one second damping radial inner protrusion 626 is embedded in the corresponding second transmission radial opening groove 521. The plurality of second transmission radial protrusions 520 and the plurality of second damping radial inner opening grooves 625 are matched one by one, and any one second transmission radial protrusion 520 is embedded in the corresponding second damping radial inner opening groove 625.

[0106] When the damping rotor assembly 100 is running, the rotating rotor iron core 10 can drive the structural member 40 and the first end damping member 61 to rotate, the first end damping member 61 drives the first transmission member 51 to rotate, the structural member 40 drives the second end damping member 62 to rotate, the second end damping member 62 drives the second transmission member 52 to rotate, and the first transmission member 51 and the second transmission member 52 simultaneously drive the rotating shaft 30 to rotate, thereby completing the power output process.

[0107] The motor according to the embodiment of the application comprises the damping rotor assembly 100 according to the embodiment of the application, and by adopting the damping rotor assembly, the motor has small vibration and low noise during operation.

[0108] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0109] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0110] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0111] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0112] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0113] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled person in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A vibration-reducing rotor assembly characterized by, The rotor core has a magnet slot and a shaft hole; A permanent magnet is arranged in the magnet slot; A shaft is arranged in the shaft hole and has a gap with the rotor core, the first end and the second end of the shaft protrude from the shaft hole; A first end damping member is arranged on the first end surface of the rotor core and connected with the rotor core, the first end damping member directly cooperates with the shaft or cooperates with the shaft through a first transmission member arranged in the first end damping member; A structure member includes an end plate arranged on the second end surface of the rotor core and a connecting strip, the first end of the connecting strip protrudes into the rotor core towards the first end damping member, and the second end of the connecting strip is connected with the end plate; A second end damping member is arranged in the end plate, the second end damping member directly cooperates with the shaft or cooperates with the shaft through a second transmission member arranged in the second end damping member; The rotor core is at least stacked by a plurality of half-continuous bridge stampings along the axial direction of the rotor core, the rotor stamping includes a body part, an outer magnetic bridge, an inner magnetic bridge and a magnetic pole, a part of the magnetic poles of the half-continuous bridge stamping are connected with the stamping body part through the inner magnetic bridge, and the other part of the magnetic poles are spaced apart from the stamping body part in the radial direction of the rotor core, and the part of the magnetic poles and the other part of the magnetic poles are alternately arranged along the circumferential direction of the rotor core; The outer magnetic bridge of the rotor core has an opening, the inner surface of the permanent magnet and the inner bottom surface of the magnet slot have a gap, and the connecting strip includes an outer connecting strip located in the opening and an inner connecting strip located in the gap; The structure member further includes a central connecting cylinder part cooperated between the inner wall of the shaft hole and the shaft. When the first end damping member cooperates with the shaft through the first transmission member, a part of the first end damping member also directly cooperates with the shaft.

2. The vibration-reducing rotor assembly of claim 1, wherein When the first end damping member cooperates with the shaft through the first transmission member, the minimum gap between the first transmission member and the rotor core in the axial direction of the rotor core is greater than or equal to 0.3 mm.

3. The vibration-reducing rotor assembly of claim 1, wherein At least one of the first end damping member and the second end damping member is made of a viscoelastic material.

4. The vibration-reducing rotor assembly of claim 1, wherein The loss factor of the viscoelastic material is greater than or equal to 0.15, and the Shore hardness of the viscoelastic material is 20 degrees-80 degrees.

5. The vibration-reducing rotor assembly of claim 4, wherein The rotor core has an axial through hole between adjacent magnet slots, and the connecting strip includes a middle connecting strip located in the axial through hole.

6. The vibration-reducing rotor assembly of any one of claims 1-5, wherein, The inner circumferential surface of the end plate is provided with radial protrusions and radial grooves located between the radial protrusions, the outer circumferential wall of the second end damping member is provided with second damping radial outer protrusions and second damping radial outer open grooves located between the second damping radial outer protrusions, the radial protrusions of the end plate are cooperated in the second damping radial outer open grooves, and the second damping radial outer protrusions are cooperated in the radial grooves of the end plate.

7. The vibration-reducing rotor assembly of claim 1, wherein ​ 8. The vibration-reducing rotor assembly of claim 1, wherein The outer circumferential surface of the first transmission member is provided with first transmission radial protrusions and first transmission radial open grooves formed between the first transmission radial protrusions, and the inner circumferential wall of the first end damping member is provided with first damping radial inner protrusions and first damping radial inner open grooves between the first damping radial inner protrusions, the first damping radial inner protrusions being fitted in the first transmission radial open grooves, and the first transmission radial protrusions being fitted in the first damping radial inner open grooves.

9. The vibration-reducing rotor assembly of claim 1, wherein In adjacent half-bridge stampings, one half-bridge stamping is rotated relative to another half-bridge stamping by one magnetic pole in the circumferential direction of the rotor core.

10. The vibration-reducing rotor assembly of claim 1, wherein The first transmission member, the second transmission member, and the structural member are made of metal, resin, or plastic.

11. An electric machine characterized by A damping rotor assembly comprising any one of claims 1-10.

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