CN118199317B - Gear tooth type rotor and motor capable of reducing axial structure resonance - Google Patents
Gear tooth type rotor and motor capable of reducing axial structure resonance Download PDFInfo
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- CN118199317B CN118199317B CN202410605923.3A CN202410605923A CN118199317B CN 118199317 B CN118199317 B CN 118199317B CN 202410605923 A CN202410605923 A CN 202410605923A CN 118199317 B CN118199317 B CN 118199317B
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- 238000004804 winding Methods 0.000 claims description 10
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- 238000010521 absorption reaction Methods 0.000 description 4
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Abstract
The invention discloses a gear tooth type rotor for reducing axial structure resonance and a motor, which are composed of a rotor core, magnetic steel, a gear shaft core and a retainer ring, wherein the magnetic steel is arranged on the rotor core to form a permanent magnet rotor assembly, an inner ring is arranged in the middle of the rotor core, a plurality of inner teeth are arranged on the inner wall of the inner ring along the circumferential direction, a shaft hole for installing a rotating shaft is formed in the middle of the gear shaft core, a plurality of outer teeth are arranged on the outer side wall of the gear shaft core along the circumferential direction, the gear shaft core is sleeved in the inner ring, and the inner teeth are meshed with the outer teeth; and the two end surfaces of the gear shaft core are respectively provided with a check ring, the outer edge of the check ring protrudes out of the gear shaft core, and when the gear shaft core and the rotor core perform relative axial movement, the check ring is matched with the end surface of the inner ring to realize the limit of axial movement. It avoids axial low-frequency resonance and reduces noise; the design scheme is low in cost, convenient for mass production, high in production efficiency and applicable to motors with overlarge torsion.
Description
Technical Field
The invention relates to a gear tooth type rotor for reducing axial structure resonance and a motor.
Background
With the popularization of household appliances, the noise of the appliances is more and more valued by users, and the noise quality requirements of the users on the appliances are higher. Such as the air conditioner of the common household appliances, the air conditioner is generally divided into wall hanging machine, wind coil machine, ceiling machine and the like. The motor of the air conditioner is an important noise source of the air conditioning system, particularly in the indoor unit of the air conditioner, and the motor occupies a larger proportion in the noise of the indoor unit due to the lower noise of the indoor unit.
The load of the air conditioner outside machine seen daily mainly comprises a box body (comprising a compressor and the like), a bracket, a motor, fan blades and the like. The motor is arranged on a bracket in the box body, the fan blades are arranged at the shaft extension end of the motor (the axial displacement of the wind wheel is limited by the split ring and the fastening nut), the mode array shape is mainly axial movement determined by the structural shape and the mass distribution of the fan blades, the front several-order mode array shape of the shaft flow fan of the air conditioner external machine is mainly the axial movement of the outer contour of the fan blades, and the inherent frequencies are all in the common frequency conversion or frequency multiplication range of the external machine.
The fan coil is an important end component of an air conditioning system and is a common cold and heat supply end device. It consists of small blower, motor, coil pipe (air heat exchanger) and other parts. The existing wind coil motor structural design has poor axial damping effect and is easy to generate resonance noise. The wind coil motor shaft is generally longer, wind wheels are arranged at two ends of the rotating shaft, and because of the existence of a low-frequency axial movement mode of the wind wheels, the exciting force of the motor is slightly large, and the axial low-frequency resonance is easily caused, so that 'buzzing' abnormal sound sensitive to human ears is generated, and people are bored.
Such as a fan coiler (as shown in fig. 1) manufactured by a manufacturer, the end user feeds back that a buzzing abnormal sound exists in a certain gear. Through test analysis, the abnormal sound of the load is obvious at 740rpm-780rpm, the motor has strong resonance near the axial direction 315Hz, then the motor with wind wheel mode test (shown in figure 2) is arranged, the motor with wind wheel is in an axial movement mode array form near 319Hz, and the result shows that the abnormal sound of the load is mainly caused by the axial movement mode array form of the wind wheel, and damping vibration absorption needs to be added in the axial direction of the motor, so that the abnormal sound is weakened or even eliminated.
The low-order mode matrix type of the load fan blade or the wind wheel is mainly axial movement, because the load fan blade is arranged on the motor rotor, namely the motor rotor and the fan blade can be regarded as a whole, and because of tiny axial displacement variation of the fan blade, the motor rotor moves forwards and backwards in the motor, namely the stator iron core and the rotor iron core are centered, at present, because of tiny axial displacement, fluctuation is generated by the electromagnetic force of the motor, exciting force harmonic waves are abundant, axial resonance is rapidly increased, and at the moment, the natural frequency (mainly the load fan blade) of certain parts is excited, and resonance noise is generated.
As shown in fig. 3, the fan blade is mounted at the extending end of the motor shaft, and the axial displacement of the fan blade is restrained by the split retaining ring and the fastening nut. The motor starts to drive the fan blades to rotate, the fan blades push air to flow in the same direction as the shaft, namely wind is discharged after passing through the motor and the fan blades in sequence, the working principle of the fan blades of the external machine is that fluid flows into the blade channels along the axial direction, when the impeller rotates under the driving of the motor, the rotating fan blades give axial thrust to the flowing fluid (when the fluid in the fan blades flows around the fan blades, according to the fluid mechanics principle, the fluid acts on the fan blades to have a lifting force, and meanwhile, the fan blades also act on the fluid to have a force with the same magnitude and opposite direction as the lifting force, namely the thrust), the thrust of the fan blades does work on the fluid, so that the energy of the fluid is increased and is discharged along the axial direction.
As shown in the general rotor structure diagram of the motor in fig. 4, the rotating shaft is integrated with the rotor core, the rotor at present comprises a rotor core 1a and a plurality of magnetic steels 2a, the plurality of magnetic steels 2a are installed on the rotor core 1a, after the shaft hole in the middle of the rotor core 1a is inserted into the rotating shaft 3a, the rotor core 1a, the plurality of magnetic steels 2a and the rotating shaft 3a are molded into a whole by injection molding after winding, the injection molding body 4a is used for installing the fan blades on the rotating shaft, namely, the fan blades move, and the whole motor rotor moves along with the movement. The rotary fan blade has larger swing amplitude caused by uneven design and technological defects of blade profile, blade number and mass distribution, larger axial force is generated to act on the motor rotor through the split retaining ring, and the whole rotor moves along with the displacement variation of the fan blade, so that the electromagnetic force is influenced by the fluctuation generated by the electromagnetic force size negligence of the motor, the axial vibration of the motor is aggravated, and resonance noise is generated.
To attenuate this resonance noise, a rubber vibration isolation gasket is typically added between the fan blade and the circlip. The rubber damping is larger, so that the vibration amplitude during resonance is reduced, and the vibration energy is greatly prevented from being transmitted along the axial direction, so that the axial resonance amplitude is rapidly reduced or even eliminated, and the problem of vibration noise is well solved. As shown in fig. 5 and 6, after the rubber vibration isolator is added between the fan blade and the split ring, the resonance rotation speed interval is between 650rpm and 830rpm, the vibration is reduced by 0.12gRMS, the noise is reduced by approximately 8dB (a) RMS, the subjective noise evaluation of the aural hearing is performed, and the noise is obviously improved. In fig. 7, the black line is the vibration curve of the original motor at the air conditioner fan, and the light gray is the vibration curve of the motor with the rubber vibration isolator at the air conditioner fan. In fig. 8, the black line is the vibration curve of the original motor, and the light gray is the vibration curve of the motor with the rubber vibration isolator.
However, most air conditioner manufacturers cannot accept adding a rubber vibration isolation gasket between the split ring and the fan blade due to the influences of the rubber materials on oil resistance, heat resistance, ageing resistance, corrosion resistance and the like, the air conditioner outer machine runs for a long time and the outdoor environment is severe, and the rubber ring is easy to age, crack and fall off to finally cause load noise reproduction. Therefore, part of motor manufacturers adopt damping rotors to solve the axial resonance problem, but the design scheme has high cost and low production efficiency, cannot meet the requirement of mass production, and the motor with overlarge torsion is not applicable, so that the two existing solutions cannot be good, and a solution which can effectively solve the resonance noise and also can give consideration to safety and reliability is required to be sought.
Disclosure of Invention
The invention aims to provide a gear tooth type rotor and a motor for reducing axial structure resonance, which solve the technical problems that in the prior art, a rubber vibration isolator is added between a fan blade and a split ring of an air conditioner to eliminate axial vibration and noise, the rubber ring is easy to age, crack and fall off to finally cause load noise reproduction due to long-term operation of an air conditioner external machine and severe outdoor environment, the design scheme is high in cost, the production efficiency is low, mass production cannot be met, and the motor with overlarge torsion is not applicable.
The aim of the invention is achieved by the following technical scheme.
A tooth rotor for reducing axial structural resonance, characterized in that: the permanent magnet rotor assembly comprises a rotor core, magnetic steel, a gear shaft core and a retainer ring, wherein the magnetic steel is arranged on the rotor core to form a permanent magnet rotor assembly, an inner ring is arranged in the middle of the rotor core, a plurality of inner teeth are arranged on the inner wall of the inner ring along the circumferential direction, a shaft hole for installing a rotating shaft is formed in the middle of the gear shaft core, a plurality of outer teeth are arranged on the outer side wall of the gear shaft core along the circumferential direction, the gear shaft core is sleeved in the inner ring, and the inner teeth are meshed with the outer teeth; the axial height H2 of the gear shaft core is larger than the axial height H1 of the rotor core, two end faces of the gear shaft core are respectively provided with a check ring, the outer edges of the check rings protrude out of the gear shaft core, and when the gear shaft core and the rotor core perform relative axial movement, the check rings are matched with the end faces of the inner rings to realize limiting of axial movement.
The check ring is a rubber check ring or a metal baffle plate with certain elasticity.
The check ring is welded or glued on the end face of the gear shaft core.
The tooth top of the inner teeth of the rotor iron core is cut into point contact with the tooth groove of the outer teeth of the gear shaft core, gaps exist between the tooth groove of the inner teeth of the rotor iron core and the tooth top of the outer teeth of the gear shaft core, lubricating grease is fully stored in the gaps, and friction force of the gear tooth type rotor moving forwards and backwards is reduced.
The rotor core is formed by overlapping a plurality of punching sheets, and the end face of the gear shaft core protrudes out of the end face of the inner ring within the range of 1mm-3 mm.
The outer side surface of the inner ring of the rotor core is provided with a plurality of magnetic conduction blocks at intervals along the circumferential direction, a magnetic steel groove is formed between two adjacent magnetic conduction blocks, and a plurality of magnetic steels are respectively embedded into the magnetic steel groove.
The axial height H3 of the magnetic steel is greater than the axial height H1 of the rotor core.
The utility model provides a motor, includes stator, rotor and pivot, and rotor suit is in the pivot outside, stator and rotor magnetic coupling, its characterized in that: the rotor is the gear tooth type rotor for reducing the axial structure resonance, and the rotating shaft is sleeved in the shaft hole in the middle of the gear shaft core.
The stator is a plastic-sealed stator and comprises a stator core, a coil winding, end insulation and a plastic-sealed body, wherein the coil winding is wound on the stator core, and the stator core, the coil winding and the end insulation are integrally molded by the plastic-sealed body through injection molding.
Compared with the prior art, the invention has the following effects:
Effect 1: when the fan runs, the gear shaft core, the rotating shaft and the fan blades can move forwards and backwards together for a certain displacement, and the rotor core is unchanged relative to the stator core due to the magnetic attraction of the magnetic steel of the rotor and the centrifugal force generated by rotation, namely, the gear shaft core, the rotating shaft and the fan blades have a certain movable displacement in the axial direction, so that the tiny axial displacement of the fan blades is changed, the front and back movement of the rotor core of the motor in the motor is not caused, the electromagnetic force of the motor is not changed in size, the fluctuation is avoided, the axial low-frequency resonance is avoided, and the noise is reduced; the problems that the traditional scheme uses the rubber vibration isolation gasket to carry out axial vibration isolation and vibration absorption, the air conditioner external unit runs for a long time and the outdoor environment is severe, and the rubber retainer ring is easy to age, crack and fall off to finally cause load noise reproduction are avoided.
Effect 2: the gear tooth type rotor with the axial resonance structure is formed by the rotor core, the magnetic steel, the gear shaft core and the check ring, the design scheme is low in cost, mass production is convenient, production efficiency is high, and the motor with overlarge torque force is also applicable.
Effect 3: the retainer ring is a rubber retainer ring or a metal baffle plate with certain elasticity, so that vibration isolation and vibration absorption are better, and noise reduction is facilitated.
Effect 4: the tooth top of the inner tooth of the rotor iron core is cut into point contact with the tooth socket of the outer tooth of the gear shaft core, gaps exist between the tooth socket of the inner tooth of the rotor iron core and the tooth top of the outer tooth of the gear shaft core, lubricating grease is fully stored in the gaps, and the friction force of the gear tooth type rotor moving forwards and backwards is reduced.
Drawings
FIG. 1 is a schematic diagram of a prior art fan-coil machine;
FIG. 2 is a plot of the frequency response of a prior art stroke coil motor + rotor at 319 Hz;
FIG. 3 is a schematic diagram of a motor and fan blade mounting structure in the prior art;
Fig. 4 is a perspective view of a rotor of a prior art motor;
FIG. 5 is a graph showing the 30-order slice contrast of noise of an outdoor unit of an air conditioner according to the prior art;
FIG. 6 is a comparative plot of 30-order slices of motor axial vibration in the prior art;
Fig. 7 is a perspective view of a cogged rotor according to an embodiment of the present invention;
FIG. 8 is an exploded view of a cogged rotor according to one embodiment of the invention;
fig. 9 is an exploded view of a cogged rotor according to an embodiment of the present invention with a rotating shaft omitted;
fig. 10 is a front view of a cogged rotor according to the first embodiment of the present invention;
FIG. 11 is a cross-sectional view A-A of FIG. 10;
FIG. 12 is a B-B cross-sectional view of FIG. 10;
fig. 13 is a perspective view of a cogged rotor according to an embodiment of the present invention with a rotating shaft omitted;
fig. 14 is a front view of a gear tooth rotor according to the first embodiment of the present invention with a rotary shaft omitted;
FIG. 15 is a C-C cross-sectional view of FIG. 14;
FIG. 16 is an assembled schematic view of a cogged rotor according to one embodiment of the invention;
FIG. 17 is a partial enlarged view of portion D of FIG. 11;
fig. 18 is a perspective view of a motor according to a second embodiment of the present invention;
fig. 19 is a structural cross-sectional view of a motor according to a second embodiment of the present invention.
Detailed Description
The invention is described in further detail below by means of specific embodiments in connection with the accompanying drawings.
Embodiment one:
As shown in fig. 7 to 17, the gear tooth type rotor for reducing resonance of an axial structure provided in this embodiment is composed of a rotor core 1, a magnetic steel 2, a gear shaft core 3 and a retainer ring 4, wherein the magnetic steel 2 is mounted on the rotor core 1 to form a permanent magnet rotor assembly, an inner ring 11 is arranged in the middle of the rotor core 1, a plurality of inner teeth 110 are circumferentially arranged on the inner wall of the inner ring 11, a shaft hole 30 for mounting a rotating shaft is formed in the middle of the gear shaft core 3, a plurality of outer teeth 31 are circumferentially arranged on the outer side wall of the gear shaft core 3, the gear shaft core 3 is sleeved in the inner ring 11, and the inner teeth 110 are meshed with the outer teeth 31; the axial height H2 of the gear shaft core 3 is larger than the axial height H1 of the rotor core 1, two end faces of the gear shaft core 3 are respectively provided with a check ring 4, the outer edges of the check rings 4 protrude out of the gear shaft core 3, and when the gear shaft core 3 and the rotor core 1 perform relative axial movement, the check rings 4 are matched with the end faces of the inner ring 11 to realize limiting of axial movement.
The retainer ring 4 is a rubber retainer ring or a metal baffle plate with certain elasticity, and has a simple structure.
The retainer ring 4 is welded or glued on the end face of the gear shaft core 3, and is convenient to install.
The tooth tops of the inner teeth 110 of the rotor core 1 are cut into point contact with tooth grooves of the outer teeth 31 of the gear shaft core 3, gaps exist between the tooth grooves of the inner teeth 110 of the rotor core 1 and the tooth tops of the outer teeth 31 of the gear shaft core 3, lubricating grease 5 is fully stored in the gaps, and friction force of the gear tooth type rotor moving forwards and backwards is reduced.
The rotor core 1 is formed by overlapping a plurality of punching sheets, the end face of the gear shaft core 3 protrudes out of the end face of the inner ring 11 by 1mm-3mm, and the design is reasonable.
The outer side surface of the inner ring 11 of the rotor core 1 is provided with a plurality of magnetic conducting blocks 12 at intervals along the circumferential direction, a magnetic steel groove 13 is formed between two adjacent magnetic conducting blocks 12, and a plurality of magnetic steels 2 are respectively embedded into the magnetic steel groove 13.
The axial height H3 of the magnetic steel 2 is greater than the axial height H1 of the rotor core 1.
The working principle of the invention is as follows: the gear tooth type rotor mainly comprises a rotor core 1, magnetic steel 2, a gear shaft core 3, a check ring 4 and the like. The structure mainly has the following design points:
1. the rotor core 1 is meshed with the gear shaft core 3, torque is transmitted through line contact, and the rotor core 1 rotates to drive the gear shaft core 3, the rotating shaft 300 and fan blades of the fan to rotate;
2. The gear shaft core 3 (the rotating shaft and the fan blades of the fan) moves forwards and backwards for a certain displacement, and the rotor core 1 is unchanged relative to the stator core due to the magnetic attraction of the magnetic steel 2 of the rotor and the centrifugal force generated by rotation, namely, the gear shaft core 3 (the rotating shaft and the fan blades of the fan) has a certain movable displacement in the axial direction, so that the tiny axial displacement of the fan blades changes, the rotor core 1 of the motor cannot move forwards and backwards in the motor, the electromagnetic force of the motor cannot be changed in a size or a fluctuation, and the axial resonance is avoided;
3. the tooth top of the rotor iron core 1 is cut into point contact with the tooth top of the gear shaft core 3, a gap exists between the tooth top of the gear shaft core 3 and the tooth top of the rotor iron core 1, and lubricating grease 5 is fully stored in the gap, so that the friction force of the gear rotor moving forwards and backwards is reduced;
4. the check rings 4 are respectively added in front of and behind the gear shaft core 3, the distance is about 1 punching thickness (about 1mm-3mm range), namely the movable distance is 2 punching thicknesses, so that the enough moving distance can be ensured, the limiting effect can be achieved, and the motor can be assembled vertically conveniently.
When the fan runs, the gear shaft core, the rotating shaft and the fan blades can move forwards and backwards together for a certain displacement, and the rotor core is unchanged relative to the stator core due to the magnetic attraction of the magnetic steel of the rotor and the centrifugal force generated by rotation, namely, the gear shaft core, the rotating shaft and the fan blades have a certain movable displacement in the axial direction, so that the tiny axial displacement of the fan blades is changed, the front and back movement of the rotor core of the motor in the motor is not caused, the electromagnetic force of the motor is not changed in size, the fluctuation is avoided, the axial low-frequency resonance is avoided, and the noise is reduced; the problems that the traditional scheme uses the rubber vibration isolation gasket to carry out axial vibration isolation and vibration absorption, the air conditioner external unit runs for a long time and the outdoor environment is severe, and the rubber retainer ring is easy to age, crack and fall off to finally cause load noise reproduction are avoided. The gear tooth type rotor with the axial resonance structure is formed by the rotor core, the magnetic steel, the gear shaft core and the check ring, the design scheme is low in cost, mass production is convenient, production efficiency is high, and the motor with overlarge torque force is also applicable.
Embodiment two:
As shown in fig. 18 and 19, a motor includes a stator 200, a rotor 100 and a rotating shaft 300, wherein the rotor 100 is sleeved outside the rotating shaft 300, and the stator 200 is magnetically coupled with the rotor 100, and is characterized in that: the rotor 100 is a gear tooth type rotor for reducing resonance of an axial structure according to the first embodiment, and the rotating shaft 300 is sleeved in the shaft hole 30 in the middle of the gear shaft core 3.
The stator 200 is a plastic-sealed stator, and includes a stator core 201, a coil winding 202, an end insulation 203, and a plastic-sealed body 204, wherein the coil winding 202 is wound on the stator core 201, and the plastic-sealed body 204 is used for injection-molding the stator core 201, the coil winding 202, and the end insulation 203 into a whole.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention are included in the scope of the present invention.
Claims (9)
1. A tooth rotor for reducing axial structural resonance, characterized in that: the permanent magnet rotor assembly comprises a rotor core (1), magnetic steel (2), a gear shaft core (3) and a retainer ring (4), wherein the magnetic steel (2) is arranged on the rotor core (1) to form a permanent magnet rotor assembly, an inner ring (11) is arranged in the middle of the rotor core (1), a plurality of inner teeth (110) are arranged on the inner wall of the inner ring (11) along the circumferential direction, a shaft hole (30) for installing a rotating shaft is formed in the middle of the gear shaft core (3), a plurality of outer teeth (31) are arranged on the outer side wall of the gear shaft core (3) along the circumferential direction, the gear shaft core (3) is sleeved in the inner ring (11), and the inner teeth (110) are meshed with the outer teeth (31); the axial height H2 of the gear shaft core (3) is larger than the axial height H1 of the rotor core (1), two end faces of the gear shaft core (3) are respectively provided with a check ring (4), the outer edges of the check rings (4) protrude out of the gear shaft core (3), and when the gear shaft core (3) and the rotor core (1) perform relative axial movement, the check rings (4) are matched with the end faces of the inner ring (11) to realize limiting of axial movement.
2. A cogging rotor for reducing axial structural resonance as defined in claim 1, wherein: the retainer ring (4) is a rubber retainer ring or a metal retainer plate with elasticity.
3. A cogged rotor for reducing axial structural resonance as defined in claim 2, wherein: the retainer ring (4) is welded or glued on the end face of the gear shaft core (3).
4. A cogged rotor according to claim 1,2 or 3, characterised in that it reduces resonance of the axial structure: the tooth tops of the inner teeth (110) of the rotor iron core (1) are cut into point contact with tooth grooves of the outer teeth (31) of the gear shaft core (3), gaps exist between the tooth grooves of the inner teeth (110) of the rotor iron core (1) and the tooth tops of the outer teeth (31) of the gear shaft core (3), lubricating grease (5) is fully stored in the gaps, and friction force of the gear tooth type rotor moving forwards and backwards is reduced.
5. A cogged rotor for reducing resonance in an axial structure according to claim 4, wherein: the rotor core (1) is formed by overlapping a plurality of punching sheets, and the end face of the gear shaft core (3) protrudes out of the end face of the inner ring (11) by a range of 1mm-3 mm.
6. A cogged rotor for reducing resonance in an axial structure according to claim 4, wherein: the outer side surface of an inner ring (11) of the rotor core (1) is provided with a plurality of magnetic conduction blocks (12) at intervals along the circumferential direction, a magnetic steel groove (13) is formed between two adjacent magnetic conduction blocks (12), and a plurality of magnetic steels (2) are respectively embedded into the magnetic steel groove (13).
7. A cogged rotor for reducing resonance in an axial structure according to claim 6, wherein: the axial height H3 of the magnetic steel (2) is larger than the axial height H1 of the rotor core (1).
8. The utility model provides a motor, includes stator (200), rotor (100) and pivot (300), and rotor (100) suit is in pivot (300) outside, and stator (200) and rotor (100) magnetic coupling, its characterized in that: the rotor (100) is a gear tooth type rotor for reducing axial structural resonance according to any one of claims 1 to 7, and the rotating shaft (300) is sleeved in the shaft hole (30) in the middle of the gear shaft core (3).
9. An electric machine as claimed in claim 8, characterized in that: the stator (200) is a plastic-packaged stator, and comprises a stator core (201), a coil winding (202), end insulation (203) and a plastic package body (204), wherein the coil winding (202) is wound on the stator core (201), and the plastic package body (204) is used for integrally injection-molding the stator core (201), the coil winding (202) and the end insulation (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410605923.3A CN118199317B (en) | 2024-05-16 | Gear tooth type rotor and motor capable of reducing axial structure resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410605923.3A CN118199317B (en) | 2024-05-16 | Gear tooth type rotor and motor capable of reducing axial structure resonance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118199317A CN118199317A (en) | 2024-06-14 |
| CN118199317B true CN118199317B (en) | 2024-08-02 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035290A (en) * | 2010-12-31 | 2011-04-27 | 东莞国亮电机有限公司 | Vibration absorption and de-noising improved structure of motor rotor |
| CN109980821A (en) * | 2019-05-21 | 2019-07-05 | 中山大洋电机股份有限公司 | A kind of damping rotor assembly and its motor of application |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035290A (en) * | 2010-12-31 | 2011-04-27 | 东莞国亮电机有限公司 | Vibration absorption and de-noising improved structure of motor rotor |
| CN109980821A (en) * | 2019-05-21 | 2019-07-05 | 中山大洋电机股份有限公司 | A kind of damping rotor assembly and its motor of application |
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