CN213243659U - Vibration reduction rotor assembly and motor with same - Google Patents

Abstract

The utility model discloses a vibration damping rotor component and a motor with the same, the vibration damping rotor component comprises a rotor iron core with a magnet groove and a rotating shaft hole, a rotating shaft arranged in the rotating shaft hole, and a permanent magnet arranged in the magnet groove, establish on rotor core's first terminal surface and the first tip damping piece that links to each other with rotor core, establish the first driving medium in first tip damping piece, establish on rotor core's second terminal surface and the second end damping piece that links to each other with rotor core and establish the second driving medium in second end damping piece, the upper portion of the first end of permanent magnet has first portion of stretching out, first portion of stretching out stretches into and cooperates in second end damping piece, the first end and the second end of pivot are stretched out from the pivot is downthehole, rotor core loops through first tip damping piece and first driving medium and loops through second tip damping piece and second driving medium drive pivot. The utility model discloses a damping rotor subassembly, the material volume of damping piece is big, falls to make an uproar and the damping is effectual, and the reliability is high.

Description

Vibration reduction rotor assembly and motor with same

Technical Field

The utility model relates to the technical field of electric machines, specifically, relate to a damping rotor subassembly and motor that has this damping rotor subassembly.

Background

With the increase of the power density of the motor, the energy density of the motor is increased, the magnetic field of the motor tends to be deeply saturated, and the electromagnetic noise is increased. In the related art, in order to reduce electromagnetic vibration and noise caused by torque fluctuation in the operation process of a motor, a damping material is filled between a rotor core and a rotating shaft or a shaft sleeve to absorb electromagnetic force waves, so that the noise of the motor is reduced, and vibration damping is realized. In the related art, the vibration damping material is filled between the rotor core and the rotating shaft or the shaft sleeve, so that the noise reduction and vibration damping effects are poor and need to be improved.

SUMMERY OF THE UTILITY MODEL

The present invention is made based on the discovery and recognition by the inventors of the following facts and problems:

in the related technology, the vibration damping rotor assembly comprises a permanent magnet, an outer iron core, a rotating shaft, an injection molding body and a vibration damping ring, the injection molding body comprises an upper end plate, a lower end plate and a plastic packaging connecting part for connecting the upper end plate and the lower end plate, an annular boss axially protrudes from the upper end plate and/or the lower end plate, an inner iron core is installed on the rotating shaft and embedded into a groove of the annular boss, and the vibration damping ring is arranged between the inner iron core and the inner wall of the groove. On the one hand, since the gap between the inner core and the inner wall of the recess is limited, the amount of material of the damper is limited, and the noise and vibration reduction effects are poor. On the other hand, the injection molding and the damping ring are made of different materials, the damping ring at the end part of the outer iron core is not connected, a gap is easy to appear on the boundary surface of the injection molding and the damping ring, and the reliability problem caused by different coefficients of thermal expansion and the like is easy to appear in the operation process. On the other hand, the vibration reduction rotor assembly needs to perform two steps of injection molding and placing of vibration reduction rings in the production process, the process is complex, and the reject ratio is high during mass production.

The utility model discloses aim at solving one of the technical problem in the correlation technique to a certain extent at least, under the prerequisite that does not influence the electromagnetic field magnetic circuit, can improve the material volume of damping piece to it makes an uproar, damping effect and reliability to improve.

Therefore, the embodiment of one aspect of the present invention provides a vibration damping rotor assembly capable of improving the material amount of a vibration damping member, reducing noise, having good vibration damping effect and high reliability.

An embodiment of another aspect of the present invention further provides a motor having the vibration reduction rotor assembly.

According to the utility model discloses a damping rotor subassembly of embodiment of first aspect includes: a rotor core having a magnet slot and a rotating shaft hole; the permanent magnet is arranged in the magnet groove, and the upper part of the first end of the permanent magnet is provided with a first extending part so as to form a first notch at the first end; the rotating shaft is arranged in the rotating shaft hole, a first end and a second end of the rotating shaft extend out of the rotating shaft hole, and a gap is formed between the rotating shaft and the rotor iron core; the first end part vibration damping piece is arranged on the first end surface of the rotor core and is connected with the rotor core; the first transmission piece is arranged in the first end part vibration damping piece and matched with the rotating shaft; the second end vibration damping part is arranged on the second end face of the rotor core and connected with the rotor core, and the first extending part extends into and is matched with the second end vibration damping part; and the rotor core sequentially passes through the first end vibration reduction piece, the first transmission piece and the second end vibration reduction piece and sequentially passes through the second end vibration reduction piece and the second transmission piece to drive the rotating shaft.

According to the utility model discloses damping rotor subassembly, through set up the first end damping piece that directly cooperates with pivot part at the first terminal surface of rotor core, and first end damping piece cooperates through first driving medium and pivot, through set up the second end damping piece that directly cooperates with pivot part at the second terminal surface of rotor core, and second end damping piece cooperates through second driving medium and pivot, avoided pivot and rotor core rigid connection, and the material volume of damping piece is big, it is effectual to reduce noise and damp; the problem of different thermal expansion coefficients does not exist, the reliability of the rotor assembly is improved, only the vibration damping piece needs to be arranged in the production process, the preparation process is simple, and the reject ratio of mass production is reduced.

In some embodiments, the second end of the permanent magnet has a second protrusion to form a second gap at the second end, the second protrusion protruding into the first end vibration damper.

In some embodiments, a portion of the first end vibration dampener is also directly engaged with the shaft and a portion of the second end vibration dampener is also directly engaged with the shaft.

In some embodiments, the thickness of the portion of the first end vibration damper and the portion of the second end vibration damper in the axial direction of the rotating shaft is L ≧ 0.5 mm.

In some embodiments, at least one of the first transmission member and the second transmission member includes a base body and a boss protruding from the base body toward the rotor core, and the rotary shaft penetrates the base body and the boss.

In some embodiments, the minimum distance between the boss and the rotor core in the axial direction of the rotor core is L1, and L1 > 0.5 mm.

In some embodiments, a minimum gap between the boss and the permanent magnet in a radial direction of the rotor core is L2, and L2 > 0.5 mm.

In some embodiments, a minimum gap between the base and the permanent magnet in the axial direction of the rotor core is L3, and L3 > 0.5 mm.

In some embodiments, the vibration damping rotor assembly further includes an outer connection vibration damping member and an inner connection vibration damping member, the rotor core has an axial through hole between adjacent magnet slots, the outer connection vibration damping member is disposed in the axial through hole, a first end of the outer connection vibration damping member is connected to the first end vibration damping member, a second end of the outer connection vibration damping member is connected to the second end vibration damping member, the inner connection vibration damping member is disposed in a gap between the rotating shaft and the rotor core, a first end of the inner connection vibration damping member is connected to the first end vibration damping member, and a second end of the inner connection vibration damping member is connected to the second end vibration damping member.

In some embodiments, the damped rotor assembly further includes an intermediate link damper, a gap is formed between the inner surface of the permanent magnet and the inner bottom surface of the magnet slot, the intermediate link damper is disposed in the gap, a first end of the intermediate link damper is connected to the first end damper, and a second end of the intermediate link damper is connected to the second end damper.

In some embodiments, the rotor core is formed by stacking a plurality of rotor sheets in an axial direction of the rotor core, the rotor sheet includes a full bridge sheet and a half bridge sheet, the rotor core has a first end portion, a second end portion and a middle section located between the first end portion and the second end portion, the first end portion and the second end portion are formed by stacking a plurality of full bridge sheets, the middle section is formed by stacking a plurality of half bridge sheets, a part of inner magnetic bridges of a plurality of inner magnetic bridges of the half bridge sheet are provided with magnetic bridge holes penetrating through the inner magnetic bridges in a circumferential direction of the rotor core, the inner magnetic bridges of one half bridge sheet are provided with the magnetic bridge holes, the inner magnetic bridges of the other half bridge sheet are not provided with the magnetic bridge holes, and the magnetic bridge holes are provided with circumferential connection vibration dampers, adjacent intermediate connection damping members are connected to each other by the circumferential connection damping members.

In some embodiments, the first end vibration damper, the second end vibration damper, the inner connecting vibration damper, the outer connecting vibration damper, the intermediate connecting vibration damper, and the circumferential connecting vibration damper are integrally injection molded from a viscoelastic material.

In some embodiments, each of the first and second end dampers is provided with an opening for exposing a portion of the rotor core.

In some embodiments, be equipped with first transmission radial outward protrusion on the periphery wall of first transmission piece and be located first transmission radial outward opening groove between the first transmission radial outward protrusion, be equipped with first damping radial inward protrusion on the internal perisporium of first end damping piece and be located first damping radial inward opening groove between the first damping radial inward protrusion, first transmission radial outward protrusion cooperation is in the first damping radial inward opening groove, first damping radial inward protrusion cooperation is in the first transmission radial outward opening groove.

An electric machine according to an embodiment of the second aspect of the present invention comprises a damped rotor assembly as described in any of the above embodiments.

According to the utility model discloses the motor, through the first terminal surface setting at rotor core and the first end damping piece of pivot part direct complex in the damping rotor subassembly, and first end damping piece is through first driving medium and pivot cooperation, through the second terminal surface setting at rotor core and the second end damping piece of pivot part direct complex, and second end damping piece passes through second driving medium and pivot cooperation, pivot and rotor core rigid connection have been avoided, and the material volume of damping piece is big, it makes an uproar and the damping is effectual to fall, high reliability.

Drawings

Fig. 1 is a perspective, disassembled view of a damped rotor assembly in accordance with an embodiment of the present invention.

Fig. 2 is another schematic view of an assembled state of the vibration damping rotor assembly shown in fig. 1.

FIG. 3 is an axial partial cross-sectional view of the vibration dampening rotor assembly shown in FIG. 1.

Figure 4 is an enlarged schematic view of Α in figure 3.

Fig. 5 is a cross-sectional view of the damped rotor shown in fig. 2.

Fig. 6 is a schematic view of one permanent magnet of a damped rotor assembly in accordance with an embodiment of the present invention.

Fig. 7 is a schematic view of one permanent magnet of a damped rotor assembly in accordance with an embodiment of the present invention.

Fig. 8 is a perspective view of a rotor core of a damped rotor assembly in accordance with an embodiment of the present invention.

Fig. 9 is a perspective view of a transmission of a damped rotor assembly according to an embodiment of the present invention.

Fig. 10 is a plan view of a transmission member of a damped rotor assembly in accordance with an embodiment of the present invention.

Fig. 11 is a schematic diagram of a semi-bridged punching sheet of a damped rotor assembly in accordance with an embodiment of the present invention.

Fig. 12 is a schematic diagram of a full bridge lamination of a damped rotor assembly in accordance with an embodiment of the present invention.

Figure 13 is a comparison of the damping ratio of a damped rotor assembly according to an embodiment of the present invention with the prior art.

Fig. 14 is another perspective view of a transmission of a rotor assembly according to an embodiment of the present invention.

Fig. 15 is a cross-sectional view of the rotor assembly shown in fig. 1.

Fig. 16 is a side view of the rotor assembly shown in fig. 1.

Reference numerals:

the vibration-damped rotor assembly 100 is,

a rotor core 10, a rotation shaft hole 101, a magnet groove 102, an axial through hole 103, a magnetic bridge hole 104, a gap 105,

a full bridge punching sheet 110, a half bridge punching sheet 120, a punching sheet body part 111, an outer magnetic bridge 112, an inner magnetic bridge 113, a magnetic pole 114, a protrusion 115,

a permanent magnet 20, a first extension 21, a first notch 22, a second extension 23, a second notch 24,

a damping member 60, a first end damping member 61, a plate portion 610, a boss portion 611, a recess 612, a first damping radially inner open groove 615, a first damping radially inner protrusion 616, a first center hole 617, a second end damping member 62, an outer connecting damping member 63, an intermediate connecting damping member 64, an inner connecting damping member 65, a circumferential connecting damping member 66,

the transmission piece 50, the first transmission piece 51, the first transmission radial protrusion 510, the first transmission radial opening groove 511, the first base 513, the first boss 514, the second transmission piece 52, the second transmission radial protrusion 520, the second transmission radial opening groove 521, the second base 523 and the second boss 524.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 11, a vibration damping rotor assembly 100 according to an embodiment of the present invention includes a rotor core 10, a permanent magnet 20, a rotation shaft 30, a vibration damping member 60, and a transmission member 50.

The rotor core 10 has a magnet groove 102 and a rotating shaft hole 101. As shown in fig. 1 and 8, the rotating shaft hole 101 is provided at a substantially central position of the rotor core 10 and penetrates the rotor core 10 in the axial direction (the left-right direction in fig. 1 and 8) of the rotor core 10. The magnet grooves 102 are provided in plural, and the plural magnet grooves 102 are arranged at regular intervals around the rotation shaft hole 101 in the circumferential direction of the rotor core 10.

The permanent magnets 20 are disposed in the magnet slots 102. As shown in fig. 1, 6 and 7, the permanent magnet 20 is plural, one permanent magnet 20 is installed in each magnet slot 102 so that the plural permanent magnets 20 are arranged at intervals in the circumferential direction of the rotor core 10, and a first end of the permanent magnet 20 (a right end of the permanent magnet 20 as shown in fig. 1 and 6) has a first protrusion 21 to form a first notch 22 at the first end. For example, as shown in fig. 6, the first notch 22 is provided at the right end of the permanent magnet 20 and is opened downward and rightward. This first breach can be under the prerequisite of guaranteeing that electromagnetic efficiency and damping mobility can not descend, the axial dimensions design space of fully increasing damping piece, be favorable to arranging the damping piece in a flexible way and promote the ability that the rotor subassembly bore bigger moment of torsion, furtherly, make damping piece take place more crisscross spaces with the permanent magnet in the axial, its axial dimensions that can reduce the damping rotor subassembly is favorable to reducing the holistic axial structure size of motor that has this damping rotor subassembly.

The rotating shaft 30 is disposed in the rotating shaft hole 101, and there is a gap between the rotating shaft 30 and the rotor core 10, in other words, as shown in fig. 4, the diameter D1 of the inner circular hole of the rotor core 10 is larger than the diameter D2 of the rotating shaft, i.e., D1 > D2. The first end (the left end of the rotating shaft 30 in fig. 1 to 3) and the second end (the right end of the rotating shaft 30 in fig. 1 to 3) of the rotating shaft 30 protrude from the rotating shaft hole 101. As shown in fig. 1 to 3, the axial direction of the rotary shaft 30 is substantially coincident with the axial direction of the rotor core 10 and is inserted into the rotor core 10 through the rotary shaft hole 101.

The damper 60 includes a first end damper 61, and the first end damper 61 is provided on a first end surface (a left end surface of the rotor core 10 in fig. 1 to 3) of the rotor core 10 and connected to the rotor core 10.

The transmission member 50 includes a first transmission member 51, the first transmission member 51 is disposed in the first end vibration damping member 61, the first transmission member 51 is engaged with the rotating shaft 30, and the rotor core 10 drives the rotating shaft at least sequentially through the first end vibration damping member 61 and the first transmission member 51. In other words, since the rotor core 10 has a gap between the inner peripheral wall of the rotation shaft hole 101 and the rotation shaft 30, the rotor core 10 does not directly drive the rotation shaft 30 but drives the rotation shaft 30 to rotate at least through the first end vibration damper 61 and the first transmission member 51.

The damper 60 further includes a second end damper 62, and the second end damper 62 is provided on a second end surface (a right end surface of the rotor core 10 in fig. 1 to 3) of the rotor core 10 and connected to the rotor core 10.

The transmission member 50 further includes a second transmission member 52, the second transmission member 52 is disposed in the second end damping member 62, the second transmission member 52 is engaged with the rotating shaft 30, and the rotor core 10 drives the rotating shaft at least sequentially through the second end damping member 62 and the second transmission member 52. In other words, since the rotor core 10 has a gap between the inner peripheral wall of the rotating shaft hole 101 and the rotating shaft 30, the rotor core 10 does not directly drive the rotating shaft 30, but drives the rotating shaft 30 to rotate at least by the second end vibration reducing member 62 and the second transmission member 52.

As shown in fig. 1, 2 and 3, the first end damper 61 is attached to the left end surface of the rotor core 10, the outer circumference of the first end damper 61 may be substantially circular, and the outer diameter of the first end damper 61 may substantially coincide with the outer diameter of the rotor core 10. The first transmission member 51 is disposed in the first end vibration reducing member 61, the rotating shaft 30 penetrates the rotor core 10 and the first transmission member 51 at least in the left-right direction, and the first transmission member 51 is directly engaged with the rotating shaft 30, whereby the rotor core 10 drives the rotating shaft 30 at least sequentially through the first end vibration reducing member 61 and the first transmission member 51. The first transmission member 51 and the rotating shaft 30 can be engaged with each other in various ways capable of transmitting torque, for example, a section of the rotating shaft 30 engaged with the first transmission member 51 has a non-circular cross section, and can also be engaged with a key. Thus, when the rotor core 10 rotates, the first end vibration damping member 61 and the first transmission member 51 disposed in the first end vibration damping member 61 are driven to rotate, and the rotation shaft 30 is driven to rotate.

As shown in fig. 1, 2 and 3, a second end damper 62 is attached to the right end surface of the rotor core 10, and the general contour and size of the second end damper 62 and the first end damper 61 may be identical. The second transmission member 52 is disposed in the second end vibration damping member 61, the rotating shaft 30 penetrates the rotor core 10 and the second transmission member 52 at least in the left-right direction, and the second transmission member 52 is directly engaged with the rotating shaft 30, so that the rotor core 10 can also drive the rotating shaft 30 sequentially through the second end vibration damping member 62 and the second transmission member 52. The second transmission member 52 can be engaged with the rotating shaft 30 in various ways for transmitting torque, for example, the section of the rotating shaft 30 engaged with the second transmission member 52 is non-circular in cross section, and can also be engaged by a key. Therefore, when the rotor core 10 rotates, the second end vibration damping member 62 and the second transmission member 52 disposed in the second end vibration damping member 62 are driven to rotate, and the rotating shaft 30 is driven to rotate.

According to the utility model discloses damping rotor subassembly, through set up the first end damping piece that directly cooperates with pivot part at the first terminal surface of rotor core, and first end damping piece cooperates through first driving medium and pivot, through set up the second end damping piece that directly cooperates with pivot part at the second terminal surface of rotor core, and second end damping piece cooperates through second driving medium and pivot, avoided pivot and rotor core rigid connection, and the material volume of damping piece is big, it is effectual to reduce noise and damp; the problem of different thermal expansion coefficients does not exist, the reliability of the rotor assembly is improved, only the vibration damping piece needs to be arranged in the production process, the preparation process is simple, and the reject ratio of mass production is reduced.

In some embodiments, the material of the first end vibration dampening member 61 and the second end vibration dampening member are both viscoelastic materials, such as rubber or thermoplastic materials. The vibration damping device can greatly absorb energy generated due to resonance by adopting the viscoelastic material, and achieves a vibration damping effect.

As shown in FIG. 13, the damping ratio of the rotor can be greatly improved by designing the rotor core end face to be a full-viscoelastic material, and compared with the end structure of a common rotor (rigidly connected) and an injection molding part (end plate) and a vibration damping ring, the damping ratio of the end structure adopting the full-viscoelastic material is larger.

In some embodiments, the loss factor of the viscoelastic material is greater than or equal to 0.15, thereby ensuring effective absorption and attenuation of electromagnetic waves during operation of the motor rotor.

Further, the shore hardness of the viscoelastic material is 20 degrees to 80 degrees, thereby improving the manufacturability of the motor. For example, shore hardness is 30 degrees, 40 degrees, 50 degrees.

In some embodiments, a second end of the permanent magnet 20 (e.g., the left end of the permanent magnet 20 in fig. 7) has a second protrusion 23 to form a second notch 24 at the second end, and the second protrusion 23 protrudes into the first end vibration damper 61. In other words, both ends at the permanent magnet all set up the breach, can balance the crisscross space of damping piece and permanent magnet at the both ends of permanent magnet, further increase the axial dimensions design space of damping piece, more do benefit to and arrange the ability that damping piece bore a bigger moment of torsion in order to promote the rotor subassembly in a flexible way.

In some embodiments, as shown in fig. 3, a portion of the first end vibration damper 61 is directly engaged with the rotary shaft 30, the rotor core 10 drives the rotary shaft 30 through a portion of the first end vibration damper 61 and sequentially through the first end vibration damper 61 and the first transmission member 51, a portion of the second end vibration damper 62 is directly engaged with the rotary shaft 30, and the rotor core 10 drives the rotary shaft 30 through a portion of the second end vibration damper 62 and sequentially through the second end vibration damper 62 and the second transmission member 52.

As shown in fig. 1, 2 and 3, the first transmission member 51 is located on the left side of a portion of the first end portion vibration damping member 61, the left end of the rotating shaft 30 sequentially penetrates through the rotor core 10, a portion of the first end portion vibration damping member 61 and the first transmission member 51 and extends out, and the first transmission member 51 and a portion of the first end portion vibration damping member 61 are directly engaged with the rotating shaft 30, so that the rotor core 10 rotates to drive the first end portion vibration damping member 61 to rotate, and further, the rotating shaft 30 is driven to rotate by the portion of the first end portion vibration damping member 61 and the first transmission member 51. And the second transmission piece 52 is located on the left side of a part of the second end vibration damping piece 62, the right end of the rotating shaft 30 sequentially penetrates through the rotor core 10, a part of the second end vibration damping piece 62 and the second transmission piece 52 and extends out, and the second transmission piece 52 and a part of the second end vibration damping piece 62 are directly matched with the rotating shaft 30, so that when the rotor core 10 rotates, the second end vibration damping piece 62 is driven to rotate, and the rotating shaft 30 is driven to rotate by a part of the second end vibration damping piece 62 and the second transmission piece 52.

Corresponding damping parts are arranged at the two end parts of the rotor core, so that when the material quantity of the damping parts is further increased, the balance damping at the two ends of the rotor core can be realized, the stability of the whole damping of the damping rotor assembly is improved, the noise reduction capability and the damping effect are improved, and the transmission reliability of the damping parts is improved.

In some embodiments, as shown in FIGS. 3 and 4, a portion of the first end damper piece 61 and a portion of the second end damper piece 62 have a thickness L in the axial direction of the rotating shaft 30, where L ≧ 0.5 mm. Thereby, the connection of the damper to the rotor core is made more reliable while the amount of material of the damper is increased.

In some embodiments, at least one of the first transmission piece 51 and the second transmission piece 52 includes a base body and a boss protruding from the base body toward the rotor core 10, and the rotating shaft 30 penetrates the base body and the boss.

As shown in fig. 14, the first transmission member 51 includes a first base 513 and a first boss 514, the first boss 514 faces the left end face of the rotor core 10, the first base 513 is fitted into the first center hole 617 of the first end damper 61, and the first boss 514 is fitted inside the first end damper 61. The first base 513 and the first boss 514 are provided with first through holes, and the rotating shaft 30 penetrates through the first base 513 and the first boss 514 through the corresponding first through holes.

As shown in fig. 14, the second transmission member 52 includes a second base 523 and a second boss 524, the second boss 524 faces the right end face of the rotor core 20, the second base 523 engages with a second center hole (not shown) of the second end damper 62, and the second boss 524 engages inside the second end damper 62. The second base 523 and the second boss 524 are provided with second through holes, and the rotating shaft 30 penetrates through the second base 523 and the second boss 524 through the corresponding second through holes.

In some embodiments, as shown in fig. 15, the minimum distance between the boss and the rotor core 10 in the axial direction of the rotor core 10 is L1, and L1 > 0.5 mm. Thereby, the connection of the damper to the rotor core is made more reliable while the amount of material of the damper is increased.

In some embodiments, as shown in fig. 16, the minimum gap between the boss and the permanent magnet in the radial direction of the rotor core is L2, and L2 > 0.5 mm. Thereby, the connection of the damper to the rotor core is made more reliable while the amount of material of the damper is increased.

In some embodiments, as shown in fig. 15, the minimum gap between the base and the permanent magnet 20 in the axial direction of the rotor core 10 is L3, and L3 > 0.5 mm. Thereby, the connection of the damper to the rotor core is made more reliable while the amount of material of the damper is increased.

In some embodiments, as shown in fig. 1, 2, 3 and 7, the vibration damping rotor assembly 100 further includes an outer connection vibration damping member 63 and an inner connection vibration damping member 62, the rotor core 10 has an axial through hole 103 between the adjacent magnet slots 102, the outer connection vibration damping member 63 is disposed in the axial through hole 103, a first end of the outer connection vibration damping member 63 (a left end of the outer connection vibration damping member 63 in fig. 1) is connected to the first end vibration damping member 61, and a second end of the outer connection vibration damping member 63 (a right end of the outer connection vibration damping member 63 in fig. 1) is connected to the second end vibration damping member 62. The inner connection damper 65 is provided in the gap between the rotation shaft 30 and the rotor core 10, a first end of the inner connection damper 65 (left end of the inner connection damper 65 in fig. 3) is connected to the first end damper 61, and a second end of the inner connection damper 65 (right end of the inner connection damper 65 in fig. 3) is connected to the second end damper 62.

As shown in fig. 1, 2, 3 and 7, the outer connection damper 63 is plural, and the plural outer connection dampers 63 are arranged at intervals in the circumferential direction of the rotor core 10, thereby further increasing the amount of material of the dampers, improving the noise reduction capability and the damping effect, and also making the connection of the first and second end dampers to the rotor core more reliable. The inner connection damper 65 is connected between the first and second end dampers 61 and 62, and the plurality of outer connection dampers 63 surround the outside of the inner connection damper 65. The inner connection damper 65 surrounds the rotation shaft 30 and is directly engaged with the rotation shaft 30. Therefore, the material quantity of the vibration damper is further increased, the noise reduction capability and the vibration damping effect are improved, the internal connection vibration damper is directly matched with the rotating shaft, and the transmission reliability of the vibration damper is further improved.

In some embodiments, as shown in fig. 1, the damping member 60 further includes a middle connection damping member 64, a gap 105 is formed between the inner surface of the permanent magnet 20 and the inner bottom surface of the magnet slot 102, the middle connection damping member 64 is disposed in the gap 105, a first end of the middle connection damping member 64 (a left end of the middle connection damping member 64 in fig. 1) is connected to the first end damping member 61, and a second end of the middle connection damping member 64 (a right end of the middle connection damping member 64 in fig. 1) is connected to the second end damping member 62.

As shown in fig. 1, the intermediate connection damper 64 is plural, the plural intermediate connection dampers 64 are arranged at intervals in the circumferential direction of the rotor core 10, and the intermediate connection damper 64 is provided between the outer connection damper 63 and the inner connection damper 65. Thereby, the connection of the damper to the rotor core is made more reliable while the amount of material of the damper is increased.

In some embodiments, as shown in fig. 8, the rotor core 10 is formed by stacking a plurality of rotor sheets along an axial direction of the rotor core, the rotor sheet includes a full bridge sheet 110 and a half bridge sheet 120, the rotor core 10 has a first end portion, a second end portion, and an intermediate portion located between the first end portion and the second end portion, the first end portion and the second end portion are formed by stacking a plurality of full bridge sheets 110, the intermediate portion is formed by stacking a plurality of half bridge sheets 120, a part of inner magnetic bridges 113 of a plurality of inner magnetic bridges 113 of the half bridge sheet 120 is provided with magnetic bridge holes 104 penetrating through the inner magnetic bridges 113 along a circumferential direction of the rotor core 10, among the inner magnetic bridges 113 of the half bridge sheets 120 adjacent to each other in the axial direction of the rotor core 10, the inner magnetic bridges of one half bridge sheet 120 are provided with magnetic bridge holes 104, the inner magnetic bridges of the other half bridge sheet 120 are not provided with magnetic bridge holes 104, the magnetic bridge holes 104 are provided with a circumferential connecting damping member 66, adjacent intermediate link damper members 64 are connected to each other by a circumferential link damper member 66.

As shown in fig. 8, 11 and 12, the rotor punching sheet includes a punching sheet main body portion 111, an outer magnetic bridge 112, an inner magnetic bridge 113 and magnetic poles 114, the magnetic poles 114 are arranged at intervals along the circumferential direction of the rotor core 10, and at least part of the magnetic poles 114 are connected with the punching sheet main body portion 111 through the inner magnetic bridge 113. The multiple rotor laminations forming the rotor core 10 include the full bridge laminations 110 and the half bridge laminations 120, the full bridge laminations 110 are located at two end portions of the rotor core 10, and the half bridge laminations 120 are located in the middle of the rotor core 10.

As shown in fig. 11, of the plurality of magnetic poles 114 of the half-bridge lamination sheet 120, a part of the magnetic poles 114 is connected to the lamination sheet main body portion 111 through the inner magnetic bridge 113, and another part of the magnetic poles 114 is spaced apart from the lamination sheet main body portion 111 in the radial direction of the rotor core 10, wherein the part of the magnetic poles 114 and the another part of the magnetic poles 114 are alternately arranged along the circumferential direction of the rotor core 10. The outer magnetic bridges 112 of the half-bridge laminations 120 are broken between adjacent magnetic poles 114.

As shown in fig. 12, in a plurality of magnetic poles 114 of the full bridge stamped sheet 110, each magnetic pole 114 is connected to the stamped sheet body portion 111 through an inner magnetic bridge 113, and the outer magnetic bridge 112 of the half bridge stamped sheet 110 is closed.

In this embodiment, through setting up the full bridge punching piece at rotor core's tip, not only be favorable to the mould of injection moulding technology to seal the material, prevent that the liquid of moulding plastics from oozing and leading to the product after the shaping to have burr and overlap, can also promote rotor core's rigidity and intensity.

As shown in fig. 8, the inner magnetic bridge 113 of one half bridge punch 120 is provided with magnetic bridge holes 104, the inner magnetic bridge 113 of the other half bridge punch 120 is not provided with magnetic bridge holes 104, and the half bridge punch 120 provided with magnetic bridge holes 104 and the half bridge punch 120 without magnetic bridge holes 104 are alternately arranged. The circumferential connection dampers 66 are arranged in a plurality of rows arranged at intervals in the axial direction of the rotor core 10, each row including a plurality of circumferential connection dampers 66 arranged at intervals in the circumferential direction of the rotor core 10, wherein the plurality of circumferential connection dampers 66 of each row connect adjacent intermediate connection dampers 64.

As shown in fig. 1, the damper 6 further includes circumferential connection dampers 66, the circumferential connection dampers 66 being arranged in a plurality of rows arranged at intervals in the axial direction of the rotor core 10, each row including a plurality of circumferential connection dampers 66 arranged at intervals in the circumferential direction of the rotor core 10, wherein the plurality of circumferential connection dampers 66 of each row connects adjacent intermediate connection dampers 64.

In some embodiments, the first end damping member 61, the second end damping member 62, the inner connection damping member 65, the outer connection damping member 63, the intermediate connection damping member 64, and the circumferential connection damping member 66 are integrally injection-molded from a viscoelastic material. Therefore, the vibration reduction piece is tightly and reliably connected with the rotor core and is not easy to separate, and the stability is improved.

Further, the first end vibration damper 61, the second end vibration damper 62, the intermediate connection vibration damper 64, and the circumferential connection vibration damper 66 are made of a thermoplastic material. Therefore, the vibration damping piece has low hardness and rigidity and good vibration damping effect. Meanwhile, the manufacturing can be realized through injection molding, and the manufacturing process is particularly good.

Specifically, the materials of the first end vibration damper 61, the second end vibration damper 62, the inner connection vibration damper 65, the outer connection vibration damper 63, the intermediate connection vibration damper 64, and the circumferential connection vibration damper 66 are all viscoelastic materials. This application is through filling viscoelastic material in the magnetic bridge hole with rotor core inside, tip and rotor core, can promote rotor core's damping characteristic, further improves and falls to make an uproar and damping performance.

Moreover, the viscoelastic materials (the first end vibration damping piece 61 and the second end vibration damping piece 62) on the two sides of the end face of the rotor core are connected, and in the actual manufacturing process, the damping materials can be filled in the two side ends through integral molding by utilizing a mold, so that the manufacturability of the motor is improved.

In some embodiments, the first end vibration damper 61 and the second end vibration damper 62 are each provided with an opening 612 for exposing a portion of the rotor core 10.

As shown in fig. 1, each of the first end vibration damping member 61 and the second end vibration damping member 62 includes a plate portion 610 and a boss portion 611, an opening 612 is provided on an outer circumferential surface of the plate portion 610, the openings 612 may be multiple, and the openings 612 are arranged along a circumferential direction of the plate portion 610 at intervals, so that a left end portion of the rotor core is exposed, thereby solving a problem that a structural rigidity of the rotor assembly is insufficient when the rotor assembly is integrally magnetized, ensuring that the rotor assembly is not significantly deformed or loosened when the rotor assembly is integrally magnetized, thereby realizing the integral magnetization of the rotor assembly, and improving the magnetizing efficiency.

The first end vibration damper 61 is provided with a plurality of openings 612, the second end vibration damper 62 is provided with a plurality of openings 612, projections formed by the openings 612 arranged on the first end vibration damper 61 and the second end vibration damper 62 on the end surface of the rotor core 10 are overlapped, and the positioning piece installed through the openings 612 can be abutted against the rotor core 10, so that the rotor core 10 is fixed between the first end vibration damper 61 and the second end vibration damper 62.

Because the projections formed by the openings 612 on the first end vibration damping part 61 and the second end vibration damping part 62 on the end surface of the rotor core 10 are overlapped, the stress points of the first end surface and the second end surface of the rotor core 10 are the same, and the stress is more uniform.

The position of the opening 612 is not limited to the outer peripheral surface of the end vibration damper, and for example, in other embodiments, the opening 612 may be provided on the plate portion 610 or the boss portion 611 of the first end vibration damper 61 and the second end vibration damper 62, as long as a part of the rotor core 10 is exposed to facilitate the positioning member to abut against the rotor core 10. In some embodiments, as shown in fig. 1 and 7, the damper 60 further includes an outer connection damper 63, the rotor core 10 has an axial through hole 103 between the adjacent magnet slots 102, the outer connection damper 63 is disposed in the axial through hole 103, a first end of the outer connection damper 63 (a left end of the outer connection damper 63 in fig. 1) is connected to the first end damper 61, and a second end of the outer connection damper 63 (a right end of the outer connection damper 63 in fig. 1) is connected to the second end damper 62.

In some embodiments, the outer peripheral wall of the first transmission member 51 is provided with first transmission radial protrusions 510 and first transmission radial opening grooves 511, and the first transmission radial opening grooves 511 are located between adjacent first transmission radial protrusions 510. As shown in fig. 1, 2 and 5, the outer peripheral wall of the first transmission member 51 is provided with a plurality of first transmission radial protrusions 510 and a plurality of first transmission radial opening grooves 511, the taper angle of the first transmission radial opening grooves 511 is α ≥ 5 °, and the first transmission radial opening grooves 511 taper radially outward, the plurality of first transmission radial protrusions 510 are arranged at intervals along the circumferential direction of the rotor core 10, and one first transmission radial opening groove 511 is formed between every two adjacent first transmission radial protrusions 510.

The outer peripheral wall of the second transmission member 52 is provided with a second transmission radial protrusion 520 and a second transmission radial opening groove 521, and the second transmission radial opening groove 521 is located between adjacent second transmission radial protrusions 520. As shown in fig. 1, 2 and 5, the outer peripheral wall of the second transmission piece 52 is provided with a plurality of second transmission radial protrusions 520 and a plurality of second transmission radial opening grooves 521, the taper angle of the second transmission radial opening grooves 521 is α ≥ 5 °, and the second transmission radial opening grooves are tapered radially outward, the plurality of second transmission radial protrusions 520 are arranged at intervals along the circumferential direction of the rotor core 10, and one second transmission radial opening groove 521 is formed between every two adjacent second transmission radial protrusions 520.

The first end damping part 61 has a first center hole 617, and a first damping radial protrusion 616 and a first radially damping inward opening groove 615 are provided on a circumferential wall of the first center hole 617, and the first radially damping inward opening groove 615 is located between adjacent first damping radial protrusions 616. As shown in fig. 1, 2 and 5, the circumferential wall of the first central hole 617 of the first end vibration damping member 61 is provided with a plurality of first vibration damping radial protrusions 616 and a plurality of first radially vibration damping inward opening grooves 615, the plurality of first vibration damping radial protrusions 616 are arranged at intervals in the circumferential direction of the rotor core 10, and one first radially vibration damping inward opening groove 615 is formed between every two adjacent first vibration damping radial protrusions 616.

The second end damping member 62 has a second central bore (not shown) with a peripheral wall provided with second damping radial projections (not shown) and second radial damping open grooves (not shown) located between adjacent second damping radial projections. The specific structure of the second end vibration damping member 62 may be the same as or similar to that of the first end vibration damping member 61, and will not be described in detail here.

The first drive radial projection 510 fits within the first radially damping inward opening groove 615 and the first damping radial projection 616 fits within the first drive radial opening groove 511. As shown in fig. 1, 2 and 5, the first transmission member 51 is disposed within the first end damping member 61 with the first transmission radial projection 510 fitted within the first radially damping inward opening groove 615 and the first damping radial projection 616 fitted within the first transmission radial opening groove 511.

The second drive radial projection 520 fits within the second vibration dampening radial opening groove, and the second vibration dampening radial projection fits within the second drive radial opening groove 521. Specifically, the manner of engaging the second transmission member 52 with the second end vibration damping member 62 may refer to the manner of engaging the first transmission member 51 with the first end vibration damping member 61.

Some specific exemplary damped rotor assemblies in accordance with the present invention are described below with reference to fig. 1-11.

As shown in fig. 1 to 3, a vibration damping rotor assembly 100 according to an embodiment of the present invention includes a rotor core 10, a plurality of permanent magnets 20, a rotating shaft 30, a transmission member 50, and a vibration damping member 60.

The rotor core 10 has a rotation shaft hole 101, a plurality of magnet grooves 102, a plurality of axial through holes 103, and a plurality of bridge holes 104. The rotating shaft hole 101 is provided at a substantially central position of the rotor core 10 and penetrates the rotor core 10 in the axial direction of the rotor core 10. The plurality of magnet slots 102 are arranged at regular intervals around the rotation shaft hole 101 in the circumferential direction of the rotor core 10. An axial through hole 103 is provided between any adjacent magnet slots 102.

The rotor core 10 is formed by stacking a plurality of rotor laminations in the axial direction of the rotor core 10, wherein the full bridge laminations 110 are located at the left end portion and the right end portion of the plurality of rotor laminations, and the half bridge laminations 120 are located at the middle portion of the plurality of rotor laminations.

The rotor punching sheet comprises a punching sheet body part 111, an outer magnetic bridge 112, an inner magnetic bridge 113 and a magnetic pole 114. In a plurality of magnetic poles 114 of the full bridge stamped sheet 120, each magnetic pole 114 is connected with the stamped sheet main body 111 through an inner magnetic bridge 113, a plurality of protrusions 115 arranged at intervals are arranged on the periphery of the stamped sheet main body 111, a protrusion 115 is arranged between adjacent inner magnetic bridges 113, and the outer magnetic bridge 112 of the half bridge stamped sheet 110 is closed.

The outer magnetic bridges 112 of the half-bridge laminations 120 are broken between adjacent magnetic poles 114. Among the plurality of magnetic poles 114 of the half-bridge lamination sheet 120, a part of the magnetic poles 114 are connected with the lamination sheet main body portion 111 through the inner magnetic bridge 113, the other part of the magnetic poles 114 are spaced from the lamination sheet main body portion 111 in the radial direction of the rotor core 10, and the part of the magnetic poles 114 and the other part of the magnetic poles 114 are alternately arranged along the circumferential direction of the rotor core 10. In the adjacent half-bridge stamped sheets 110 in the middle, one half-bridge stamped sheet 110 rotates by one magnetic pole 114 relative to the other half-bridge stamped sheet 110 along the circumferential direction of the rotor core 10. Therefore, the inner magnetic bridge of the rotor core forms a structure of alternate connection and disconnection in the axial direction, the electromagnetic performance of the motor can be improved, and the energy consumption is reduced.

The inner magnetic bridge 112 of the rotor core 10 is provided with a plurality of magnetic bridge holes 104, each magnetic bridge hole 104 penetrates through the inner magnetic bridge 112 along the circumferential direction of the rotor core 10, and the plurality of magnetic bridge holes 104 are distributed at intervals along the axial direction of the rotor core 10.

The plurality of permanent magnets 20 are respectively provided in the plurality of magnet slots 102 correspondingly such that the plurality of permanent magnets 20 are arranged at intervals in the circumferential direction of the rotor core 10. A gap 105 is provided between the inner surface of each permanent magnet 20 and the inner bottom surface of the corresponding magnet slot 102.

The axial direction of the rotating shaft 30 is substantially the same as the axial direction of the rotor core 10, and the rotating shaft hole 101 is formed in the rotor core 10, and a gap is formed between the rotating shaft 30 and the rotor core 10.

The damping member 60 includes a first end damping member 61, a second end damping member 62, an outer connecting damping member 63, an intermediate connecting damping member 64, an inner connecting damping member 65, and a circumferential connecting damping member 66.

First end damping piece 61 is connected at the left end face of rotor core 10, and second end damping piece 62 is connected at the right-hand member face of rotor core 10, and first end damping piece 61, rotor core 10 and second end damping piece 62 are run through in proper order to pivot 30 along the direction from a left side to the right side, and the direct cooperation in the periphery of first end damping piece 61 and pivot 30 is just interior circumference and the direct cooperation in the periphery of pivot 30 of second end damping piece 62.

The first end vibration damping member 61 and the second end vibration damping member 62 each include a plate portion 610 and a boss portion 611. The outer peripheral surface of the plate portion 610 is provided with a plurality of notches 612, and the plurality of notches 612 are arranged at intervals in the circumferential direction of the plate portion 610. The boss portion 611 of the first end vibration damper 61 protrudes leftward from the left end surface of the first end vibration damper 61, and the boss portion 621 of the second end vibration damper 62 protrudes rightward from the right end surface of the second end vibration damper 62.

The first end damping part 61 has a plurality of first damping radial protrusions 616 and a plurality of first radially damping inward opening grooves 615 on a circumferential wall of a first center hole 617, the plurality of first damping radial protrusions 616 are arranged at intervals in the circumferential direction of the rotor core 10, and one first radially damping inward opening groove 615 is formed between every two adjacent first damping radial protrusions 616.

The second end vibration damping member 62 has a second center hole, a plurality of second vibration damping radial protrusions and a plurality of second radial vibration damping open slots are provided on a circumferential wall of the second center hole, the plurality of second vibration damping radial protrusions are arranged at intervals along the circumferential direction of the rotor core 10, and one second radial vibration damping open slot is formed between every two adjacent second vibration damping radial protrusions.

The inner connection damper 65 is provided in the gap between the rotary shaft 30 and the rotor core 10, and the left end of the inner connection damper 65 is connected to the first end damper 61, and the right end of the inner connection damper 65 is connected to the second end damper 62.

The outer connecting damper 63 is disposed in the axial through hole 103, and the left end of the outer connecting damper 63 is connected to the first end damper 61, and the right end of the outer connecting damper 63 is connected to the second end damper 62. Since the outer connection damper 63 is plural, the plural outer connection dampers 63 are arranged at intervals in the circumferential direction of the rotor core 10 and surround the outside of the inner connection damper 65.

The intermediate connection damper 64 is disposed in the gap 105, the left end of the intermediate connection damper 64 is connected to the first end damper 61, and the right end of the intermediate connection damper 64 is connected to the second end damper 62. The intermediate connection damper 64 is thus plural, the plural intermediate connection dampers 64 are arranged at intervals in the circumferential direction of the rotor core 10, and the intermediate connection damper 64 is provided between the outer connection damper 63 and the inner connection damper 65.

The circumferential connection dampers 66 are arranged in a plurality of rows arranged at intervals in the axial direction of the rotor core 10, each row including a plurality of circumferential connection dampers 66 arranged at intervals in the circumferential direction of the rotor core 10, wherein the plurality of circumferential connection dampers 66 of each row connect adjacent intermediate connection dampers 64.

The first end vibration damper 61, the second end vibration damper 62, the intermediate connection vibration damper 64, the outer connection vibration damper 63, the inner connection vibration damper 65 and the circumferential connection vibration damper 66 are integrally formed by injection molding, and are made of rubber or thermoplastic material. Therefore, the vibration damping piece has lower hardness and rigidity, a good vibration damping effect, close and reliable connection with the rotor core, difficulty in separation and improved stability.

The transmission member 50 includes a first transmission member 51 and a second transmission member 52. The outer peripheral wall of the first transmission member 51 is provided with a plurality of first transmission radial protrusions 510 and a plurality of first transmission radial opening grooves 511, the plurality of first transmission radial protrusions 510 are arranged at intervals along the circumferential direction of the rotor core 10, and one first transmission radial opening groove 511 is formed between every two adjacent first transmission radial protrusions 510. The first transmission member 51 is disposed within the first end damping member 61 with the first transmission radial projection 510 engaged within the first radially damping inwardly opening groove 615 and the first damping radial projection 616 engaged within the first transmission radial opening groove 511.

The outer peripheral wall of the second transmission member 52 is provided with a plurality of second transmission radial protrusions 520 and a plurality of second transmission radial opening grooves 521, the plurality of second transmission radial protrusions 520 are arranged at intervals along the circumferential direction of the rotor core 10, and one second transmission radial opening groove 521 is formed between every two adjacent second transmission radial protrusions 520. The second transmission member 52 is disposed within the second end damping member 62 with the second transmission radial projection 520 engaged within the second damping radial opening groove 521.

The rotating shaft 30 sequentially penetrates through the first transmission piece 51, a part of the first end vibration damping piece 61, the rotor core 10, a part of the second end vibration damping piece 62 and the second transmission piece 52 along a left-to-right direction, and the first transmission piece 51, a part of the first end vibration damping piece 61, the rotor core 10, a part of the second end vibration damping piece 62 and the second transmission piece 52 are directly matched with the rotating shaft 30, so that the first end vibration damping piece 61 and the second end vibration damping piece 62 are driven to rotate when the rotor core 10 rotates, and the rotating shaft 30 is driven to rotate through the part of the first end vibration damping piece 61, the part of the first transmission piece 51, the part of the second end vibration damping piece 62 and the second transmission piece 52.

According to the utility model discloses damping rotor subassembly's specific technology process can be for:

respectively manufacturing a rotor iron core, a permanent magnet, a rotating shaft and a transmission part;

sleeving the rotor iron core on the rotating shaft through the rotating shaft hole;

putting the assembled rotor iron core, the rotating shaft and the transmission piece into a mold, positioning, and respectively and correspondingly inserting a plurality of permanent magnets into a plurality of magnet grooves of the rotor iron core;

the rotor core, the permanent magnet, the rotating shaft and the transmission piece are molded into an integrated plastic-coated structure by using rubber or thermoplastic materials through an injection molding process, wherein the structure formed by the rubber or thermoplastic materials is the vibration damping piece.

An electric machine according to embodiments of the present invention includes the vibration damped rotor assembly 100 of any of the above embodiments.

According to the utility model discloses motor through the structure to damping rotor subassembly improves, can set up damping piece and driving medium at rotor core's at least tip, and damping piece at least part can directly cooperate with the pivot, and other part accessible driving mediums and the pivot cooperation of damping piece have avoided the rigid connection of pivot with rotor core, and simultaneously, increased the material volume of damping piece, improve the whole motor fall make an uproar and damping effect.

Further, set up jaggedly at the one end or both ends of permanent magnet, this breach structure can be guaranteeing under the prerequisite that electromagnetic efficiency and damping nature can not descend, fully increase the axial dimensions design space of damping piece, be favorable to arranging the ability that damping piece promoted the rotor subassembly and bear more moment of torsion in a flexible way, make damping piece take place more crisscross spaces with the permanent magnet in the axial, its axial dimensions that can reduce the damping rotor subassembly, be favorable to reducing the holistic axial structure size of motor that has this damping rotor subassembly.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do 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, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (15)

1. A damped rotor assembly, comprising:

a rotor core having a magnet slot and a rotating shaft hole;

the permanent magnet is arranged in the magnet groove, and the upper part of the first end of the permanent magnet is provided with a first extending part so as to form a first notch at the first end;

the rotating shaft is arranged in the rotating shaft hole, a first end and a second end of the rotating shaft extend out of the rotating shaft hole, and a gap is formed between the rotating shaft and the rotor iron core;

the first end part vibration damping piece is arranged on the first end surface of the rotor core and is connected with the rotor core;

the first transmission piece is arranged in the first end part vibration damping piece and matched with the rotating shaft;

the second end vibration damping part is arranged on the second end face of the rotor core and connected with the rotor core, and the first extending part extends into and is matched with the second end vibration damping part;

and the rotor core sequentially passes through the first end vibration reduction piece, the first transmission piece and the second end vibration reduction piece and sequentially passes through the second end vibration reduction piece and the second transmission piece to drive the rotating shaft.

2. The damped rotor assembly of claim 1 wherein the second end of the permanent magnet has a second protrusion to form a second notch at the second end, the second protrusion extending into the first end damper.

3. The damped rotor assembly of claim 1, wherein a portion of the first end damping member is further directly engaged with the rotating shaft and a portion of the second end damping member is further directly engaged with the rotating shaft.

4. The damped rotor assembly of claim 3 wherein the thickness of the portion of the first end damping member and the portion of the second end damping member in the axial direction of the shaft is L ≧ 0.5 mm.

5. The damped rotor assembly according to claim 1 wherein at least one of the first transmission member and the second transmission member includes a base and a boss projecting from the base toward the rotor core, the shaft extending through the base and the boss.

6. The vibration damping rotor assembly according to claim 5 wherein the minimum distance between the boss and the rotor core in the axial direction of the rotor core is L1, and L1 > 0.5 mm.

7. The vibration damping rotor assembly according to claim 5 wherein a minimum gap between the boss and the permanent magnet in a radial direction of the rotor core is L2, and L2 > 0.5 mm.

8. The vibration damping rotor assembly according to claim 5 wherein a minimum gap between the base body and the permanent magnet in the axial direction of the rotor core is L3, and L3 > 0.5 mm.

9. The damped rotor assembly of any one of claims 1-8 further comprising an outer link damper member and an inner link damper member, the rotor core having an axial through bore between adjacent magnet slots, the outer link damper member disposed within the axial through bore, a first end of the outer link damper member coupled to the first end damper member, a second end of the outer link damper member coupled to the second end damper member, the inner link damper member disposed within a gap between the shaft and the rotor core, the first end of the inner link damper member coupled to the first end damper member, and the second end of the inner link damper member coupled to the second end damper member.

10. The damped rotor assembly of claim 9 further comprising an intermediate link damper, the permanent magnet having a gap between the inner surface and the inner bottom surface of the magnet slot, the intermediate link damper being disposed within the gap, the intermediate link damper having a first end coupled to the first end damper and a second end coupled to the second end damper.

11. The vibration damping rotor assembly according to claim 10, wherein the rotor core is formed by stacking a plurality of rotor laminations in an axial direction of the rotor core, the rotor laminations include full bridge laminations and half bridge laminations, the rotor core has a first end portion, a second end portion and a middle portion between the first end portion and the second end portion, the first end portion and the second end portion are formed by stacking a plurality of full bridge laminations, the middle portion is formed by stacking a plurality of half bridge laminations, a part of the inner magnetic bridges of the plurality of inner magnetic bridges of the half bridge laminations are provided with magnetic bridge holes penetrating through the inner magnetic bridges in a circumferential direction of the rotor core, the magnetic bridge holes are provided in the inner magnetic bridges of one half bridge lamination, and the inner magnetic bridges of the other half bridge lamination are not provided with magnetic bridge holes, and circumferential connection damping pieces are arranged in the magnetic bridge holes, and adjacent intermediate connection damping pieces are connected with each other through the circumferential connection damping pieces.

12. The damped rotor assembly of claim 11 wherein the first end damping member, the second end damping member, the inner connecting damping member, the outer connecting damping member, the intermediate connecting damping member and the circumferential connecting damping member are integrally injection molded of a viscoelastic material.

13. The damped rotor assembly according to any one of claims 1-8, wherein each of the first and second end dampers is provided with an opening for exposing a portion of the rotor core.

14. The vibration damping rotor assembly according to claim 1, wherein a first transmission radially outward protrusion and a first transmission radially outward opening groove located between the first transmission radially outward protrusions are formed in the outer peripheral wall of the first transmission member, a first vibration damping radially inward protrusion and a first vibration damping radially inward opening groove located between the first vibration damping radially inward protrusions are formed in the inner peripheral wall of the first end vibration damping member, the first transmission radially outward protrusion is matched in the first vibration damping radially inward opening groove, and the first vibration damping radially inward protrusion is matched in the first transmission radially outward opening groove.

15. An electrical machine comprising a damped rotor assembly according to any one of claims 1 to 14.

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