CN110680229B - Electric fan and electric dust collector equipped with same - Google Patents
Electric fan and electric dust collector equipped with same Download PDFInfo
- Publication number
- CN110680229B CN110680229B CN201910160379.5A CN201910160379A CN110680229B CN 110680229 B CN110680229 B CN 110680229B CN 201910160379 A CN201910160379 A CN 201910160379A CN 110680229 B CN110680229 B CN 110680229B
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- fitting portion
- core
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- stator
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
Abstract
The invention provides an electric fan and an electric dust collector which reduce noise caused by vibration of a stator. The electric blower of the present invention includes: a motor having a rotor core and a stator core; a rotating shaft provided to be rotatable; the rotor core integrally formed in the vicinity of one end of the rotating shaft; a rotor mounted near the other end of the rotating shaft; a pair of bearings mounted on the rotating shaft between the rotor core and the rotor; a housing holding the pair of bearings; and a fan case covering the rotor, wherein the stator core is configured by connecting a plurality of divided cores having the same shape, and the divided cores are provided with bobbins as insulating members covering the respective divided cores, and have connecting portions for connecting gaps between the adjacent bobbins.
Description
Technical Field
The present invention relates to an electric blower and an electric cleaner equipped with the same.
Background
In recent years, in a wireless vacuum cleaner and an autonomous electric vacuum cleaner, which are in rapid demand, an electric blower using a DC brushless motor is used in order to obtain a sufficient output even when driven by a low-voltage battery and reduce vibration and noise.
In addition, in order to achieve the miniaturization of the electric vacuum cleaner, the miniaturization of the electric blower is also required. In the miniaturization of the electric blower, the outer diameter of the fan can be reduced by increasing the speed of the electric blower. Therefore, there is an example in which the rotation speed of the brushless motor is set to about 8 ten thousand revolutions per minute or more.
As a conventional electric blower for an electric vacuum cleaner, there is one disclosed in japanese patent application laid-open No. 2016 and 153636 (patent document 1), for example.
The electric blower disclosed in patent document 1 describes "including: a rotating shaft rotatably provided; a bearing portion provided substantially at the center in the axial direction of the rotary shaft; a centrifugal impeller provided at one end of the rotary shaft; a rotor core provided on the opposite side of the centrifugal impeller with the bearing portion of the rotating shaft interposed therebetween; a stator core disposed to face a periphery of the rotor core; and a ring member provided at the other end of the rotary shaft, the ring member being made of a non-magnetic material having a specific gravity greater than that of the rotor core. ".
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-153636
Disclosure of Invention
Problems to be solved by the invention
The electric fan of patent document 1 can reduce the unbalance amount of the rotating body (rotor assembly) and reduce the vibration of the rotating body, and can rotate at a high speed of 8 ten thousand or more revolutions per minute to miniaturize the electric fan, in order to perform balance adjustment using the ring member and the centrifugal impeller provided at the shaft end. In addition, the operation sound of the electric vacuum cleaner is also reduced by reducing the rotational vibration.
Here, when the electric fan is operated, the electromagnetic force generated between the rotor core and the stator core periodically changes with the rotation of the rotor core. By this periodically varying electromagnetic force, the stator core sometimes vibrates, and noise may be generated.
In order to solve the above problems, an object of the present invention is to provide an electric blower and an electric vacuum cleaner capable of reducing noise, particularly harmonic noise of a rotational frequency (integral multiple of the rotational frequency), by suppressing vibration generated from a stator unit with a simple configuration.
Means for solving the problems
In order to solve the above problem, one of the electric fans of the present invention is typically achieved by: a motor having a rotor core and a stator core; a rotating shaft provided to be rotatable; a rotor core integrally formed near one end of the rotating shaft; a rotor mounted near the other end of the rotating shaft; a pair of bearings mounted on the rotating shaft between the rotor core and the rotor; a housing holding a pair of bearings; and a fan case covering the rotor, wherein the stator core is configured by connecting a plurality of split cores having the same shape, each split core includes an annular yoke portion, a magnetic pole portion protruding from the yoke portion to the inner diameter side, and a tooth portion formed at the tip end portion of the magnetic pole portion, a bobbin as an insulating member covering each split core is disposed in each split core, and the split cores include a connecting portion connecting the tooth portions by adjacent bobbins.
Effects of the invention
According to the present invention, it is possible to provide an electric blower capable of reducing noise, particularly harmonic noise of a rotational frequency, while suppressing vibration of a motor stator portion, and an electric cleaner including the electric blower.
Problems, structures, and effects other than those described above will become apparent from the following description of the embodiments.
Drawings
Fig. 1(a) is an external view of an electric blower according to an embodiment of the present invention.
Fig. 1(b) is a longitudinal sectional view of an electric blower according to an embodiment of the present invention.
Fig. 2(a) is a plan view of a stator core according to an embodiment of the present invention.
Fig. 2(b) is a perspective view of a divided core constituting a stator core according to an embodiment of the present invention.
Fig. 3(a) is an exploded perspective view of a core segment and a bobbin that constitute a stator according to an embodiment of the present invention.
Fig. 3(b) is a perspective view of a stator according to an embodiment of the present invention, in which a divided core and a bobbin are fitted to each other.
Fig. 3(c) is an external perspective view of a stator according to an embodiment of the present invention in which a bobbin is fitted to a divided core and a field winding is wound.
Fig. 4(a) is an external perspective view of the stator according to the embodiment of the present invention, as viewed from the fan case side.
Fig. 4(b) is a sectional view of a stator according to an embodiment of the present invention.
Fig. 4(c) is an external perspective view of the stator according to the embodiment of the present invention, as viewed from the side opposite to the fan casing.
Fig. 5 is a plan view of the bobbin 10 according to the embodiment of the present invention as viewed from the stator side.
Fig. 6(a) is an external view of two split cores fitted together.
Fig. 6(b) is an enlarged sectional view of the tooth portion.
Fig. 7 is an external view of the divided cores fitted with the bobbin.
Fig. 8 is a frequency analysis result illustrating a noise reduction effect of the tooth constraint of the stator.
Fig. 9(a) is a perspective view showing a vacuum cleaner on which an electric blower according to an embodiment of the present invention is mounted, and when the vacuum cleaner is used in a stick type.
Fig. 9(b) is a side view showing a portable electric vacuum cleaner on which an electric blower according to an embodiment of the present invention is mounted.
Fig. 10 is a longitudinal sectional view of a cleaner body on which the electric blower of the present embodiment is mounted.
Detailed Description
An embodiment of the present invention is described below with reference to the drawings. In the present embodiment, the rotor is described using a centrifugal impeller.
Example 1
The electric blower 200 will be described with reference to an external view of the electric blower shown in fig. 1(a) and a longitudinal sectional view of the electric blower shown in fig. 1 (b). The electric blower 200 is roughly divided into a blower part 201 and a motor part 202. The fan unit 201 includes a centrifugal impeller 1 as a rotor, a fan case 2 housing the centrifugal impeller 1, and a guide vane 3, and the guide vane 3 includes a plurality of diffuser blades 3a and a plurality of return guide blades 3b provided on the back surface of the diffuser blades 3 a. The fan housing 2 is provided with an air inlet 2 a. An airtight holding member 2b using an elastic body is integrally formed on the inner surface of the fan casing 2 with the fan casing 2. In the present embodiment, the airtight holding member 2b and the fan case 2 are integrally formed by insert molding.
The centrifugal impeller 1 is made of thermoplastic resin and is directly connected to the rotating shaft 4. In the present embodiment, the centrifugal impeller 1 as a rotor is press-fitted and fixed to the rotary shaft 4, but the centrifugal impeller 1 may be fixed by using a fixing nut by providing a screw thread at an end portion of the rotary shaft 4.
The motor unit 202 is composed of a rotor core 6 fixed to the rotating shaft 4 housed in the housing 5, and a stator 7 fixed to the housing 5.
The rotor core 6 is formed on the end portion side of the rotary shaft 4 opposite to the end portion to which the centrifugal impeller 1 is fixed, and is made of a rare-earth bond magnet. The rare-earth bonded magnet is produced by mixing rare-earth magnetic powder with an organic binder. As the rare-earth-based bonded magnet, for example, a samarium-iron-nitrogen magnet, a neodymium magnet, or the like can be used. The rotor core 6 is integrally formed with the rotary shaft 4. In the present embodiment, the rotor core 6 uses a permanent magnet, but is not limited to this, and a reluctance motor or the like, which is one type of reluctance motor capable of rotating at high speed of, for example, 80000 rpm or more, may be used.
The stator 7 is disposed on the outer peripheral side of the rotor core 6 and is fixed to the housing 5 by a fixing screw 8. The stator 7 is provided with a stator core 9 (fig. 2) formed by laminating electromagnetic steel plates in the direction of the rotation axis, two bobbins 10 and 11 are arranged around the stator core 9, and a field winding 12 is wound around the bobbins 10 and 11. The field winding 12 is electrically connected to a circuit portion, not shown, of the electric blower 200.
A positioning sleeve 18 for the bearing 14 is disposed between the rotor core 6 and the bearing 14. The housing 5 is made of a synthetic resin material and has a support portion 19 for fixing a bearing cap 16 enclosing the bearings 13 and 14. The bearing cap 16 is made of a nonmagnetic metal material and is integrated with the resin case 5 by insert molding. The bearing cover 16 is preferably made of a material having high thermal conductivity, such as aluminum alloy.
A screw hole 20 extending in the rotation axis direction is formed at an end of the support portion 19 of the resin case 5. The fixing screws 21 are screwed into the screw holes 20, and the guide vane 3 is fixed to the resin case 5 by screwing the fixing screws 21. In the casing 5, an opening 22 and an exhaust port 23 for discharging air to the outside of the electric blower 200 are provided so that air flows into the casing 5. The stator core 9 and the bobbin 11 of the stator 7 disposed at the end of the housing 5 are fixed to the housing 5 by fixing screws 8.
Next, the air flow in electric fan 200 will be described. When the motor unit 202 is driven to rotate the centrifugal impeller 1 as a rotor, air flows in from the air inlet 2a of the fan housing 2 and flows into the centrifugal impeller 1. The air flowing in is pressurized and accelerated in the centrifugal impeller 1, and flows out from the outer periphery of the centrifugal impeller 1. The air flow flowing out of the centrifugal impeller 1 is guided by the guide vanes 3.
The guide vane 3 is provided with a plurality of diffuser blades 3a, and the air flow is decelerated between the blades of the diffuser blades 3a, whereby the kinetic energy of the air flow is converted into pressure energy, and the pressure rises. The air flow flowing out from between the diffuser blades 3a flows into the return guide blade 3b from the flow path formed by the inner surface of the fan housing 2 and the guide vane 3.
The diffusion blade 3a protrudes into the airtight holding member 2b of the fan casing 2, thereby maintaining the airtightness between the fan casing 2 and the diffusion blade 3 a. This can prevent leakage of the guide vane 3 between the diffuser blades 3a, and can improve fan efficiency. In the present embodiment, a vaned diffuser is used, but a vaneless diffuser may be used.
The air flow passing through the return guide vane 3b flows into the casing 5 from the opening 22 of the casing 5, cools the cooling fin 24 of the bearing cap 16, and cools the bearings 13 and 14 via the bearing cap 16. The rotor core 6, the stator core 9, the field winding 12, and the like are cooled and discharged to the outside. This cools each part in the housing 5. A part of the air flow passing through the return guide vane 3b is discharged to the outside from the exhaust port 23 of the casing 5.
The stator 7 of the motor section 202 according to one embodiment of the present invention will be described with reference to fig. 2 to 7. Fig. 2(a) is a plan view of a stator core 9 according to an embodiment of the present invention, fig. 2(b) is a perspective view of a divided core 25 constituting the stator core 9, FIG. 3(a) is an exploded perspective view of a divided core 25, a bobbin 10 and a bobbin 11 constituting a stator 7, FIG. 3(b) is a perspective view showing the split core 25 fitted to the bobbin 10 and the bobbin 11, FIG. 3(c) is an external perspective view of the divided core 25 fitted with the bobbin 10, the bobbin 11 and the wound field winding 12, fig. 4(a) is an external perspective view of the stator 7 as viewed from the fan housing 2 side, fig. 4(b) is a sectional view of the stator 7, FIG. 4(c) is an external perspective view of the stator 7 viewed from the opposite side of the fan housing 2, fig. 5 is a plan view of the bobbin 10 viewed from the stator 7 side, and fig. 6(a) and 6(b) are enlarged sectional views of the stator teeth. Fig. 6(a) is an external view of two split cores fitted together, and fig. 6(b) is an enlarged sectional view of a tooth portion. Fig. 7 is an external view of the bobbin 10 wound around the divided core 25.
First, a stator core 9 constituting a stator 7 according to an embodiment of the present invention will be described with reference to fig. 2. The stator core 9 according to one embodiment of the present invention is configured by connecting the divided cores 25 having the same shape. The split core 25 is formed by laminating electromagnetic steel sheets in the direction of the rotation axis and fixing the electromagnetic steel sheets to each other by a caulking portion 26. The divided core 25 includes a yoke 27, magnetic pole portions 28, and tooth portions 29. A slit portion 30 for inserting the field winding 12 is formed by a space surrounded by the yoke portion 27, the magnetic pole portion 28, and the tooth portion 29 of each of the divided cores 25.
A substantially rectangular groove 31 for connecting the divided cores 25 to each other is provided at an end portion in the circumferential direction of the yoke 27, and a substantially rectangular protrusion 32 is provided at the other end portion. Stator core 9 is integrally formed by fitting each of divided cores 25. In the stator 7, the bobbins 10 and 11 are disposed on the respective divided cores 25 (see fig. 3 b), the field winding 12 is wound around the magnetic pole portions 28 of the respective divided cores 25 via the bobbins 10 and 11 (see fig. 3 c), and the respective divided cores 25 are connected and integrally formed. A through hole 33 for fixing to the housing 5 is provided on the outer diameter side of the circumferential center of the yoke portion 27 of the divided core 25, and is fixed to the housing 5 together with the bobbin 11 by a fixing screw 8.
By providing the stator core 9 as the split core 25, the material utilization rate of the electromagnetic steel sheet can be improved and the material cost can be reduced as compared with the case of providing the integrated core. Further, since the magnetic pole portion 28 around which the field winding 12 is wound is open, the winding process is easy to perform, and productivity can be improved. Further, since the field winding 12 is easily wound in order, the length of the field winding 12 can be shortened, and the efficiency of the electric fan 200 can be improved.
Further, by providing the caulking portions 26 of the respective divided cores 25 at 3 positions of the magnetic pole portions 28 and both end sides of the yoke portion 27, the rigidity of the divided cores 25 alone is improved. The substantially rectangular groove portions 31 and the substantially rectangular protrusion portions 32 at the circumferential end portions of the respective divided cores 25 can firmly connect the divided cores 25 to each other, and welding or the like is not required, whereby the rigidity of the integrated stator core 9 can be improved. Here, in the present embodiment, the circumferential end portions of the divided cores 25 are connected by the substantially rectangular groove portions 31 and the substantially rectangular protrusion portions 32, but may be formed in a substantially trapezoidal shape, a substantially triangular shape, a substantially elliptical shape, or the like as long as the divided cores 25 can be firmly connected to each other.
Next, a stator 7 according to an embodiment of the present invention will be described with reference to fig. 3 to 7. Two bobbins 10 and 11 are arranged around the divided core 25 according to an embodiment of the present invention. The bobbin 10 and the bobbin 11 are made of an insulating synthetic resin material, and are fitted so as to prevent the field winding 12 from directly contacting the divided cores 25. The divided core 25 shown in fig. 3(a) is a core in which stacked magnetic steel sheets are integrated and displayed.
The bobbin 10 and the bobbin 11 are preferably formed easily and have both electrical insulation and a certain degree of heat resistance and rigidity, and for example, polybutylene terephthalate resin (PBT), polyethylene terephthalate resin (PET), and a resin containing glass fibers among these resins are preferable.
The bobbin 10 is integrally formed so as to cover the inner circumferential surface 27a and a part of the inner circumferential surface 27b on the inner diameter side of the yoke portion 27, the side surfaces 28a and the upper surfaces 28b of the magnetic pole portions 28, and the side surfaces 29a and the upper surfaces 29b of the tooth portions 29 of the divided core 25 from the direction indicated by the arrow a shown in fig. 3 (a). In addition, the winding guide 34 is formed in the bobbin 10 when the field winding 12 is wound. At circumferential end portions of the bobbin 10 covering the teeth 29, fitting portions 35 and 36 are provided to connect the bobbins 10 to each other as shown in fig. 5. When the divided cores 25 are coupled, the fitting portions 35 and 36 are connected and restrained in the circumferential and radial directions. This can improve the rigidity of the integrated stator 7.
The bobbin 11 is integrally formed so as to cover a part of the outer peripheral surface 27c of the yoke portion 27 of the divided core 25 on the outer diameter side, the lower surface 27d, the lower surface (not shown) of the magnetic pole portion 28, and the lower surface 29c of the tooth portion 29 from the direction indicated by the arrow B shown in fig. 3 (a). The winding guide 37 for winding the field winding 12 is formed on the bobbin 11, and the housing 5 is formed with a mounting hole 38 for fixing the stator 7 (see fig. 4 c).
As shown in fig. 3(b) and 3(c), since the bobbin 10 and the bobbin 11 are fitted to the divided cores 25 and the slit portions 30 are covered with the insulating bobbin 10 and the insulating bobbin 11, the field winding 12 and the divided cores 25 do not directly contact each other and can be electrically insulated. As a result, the field winding 12 can be wound around the divided cores 25 with strong tension, and therefore the divided cores 25 can be integrated with the bobbin 10 and the bobbin 11 in close contact with each other strongly.
The winding guides 34 and 37 are formed on the bobbins 10 and 11, respectively, and serve as guides for winding the magnetic pole portions 28 around the field winding 12, thereby preventing the field winding 12 from being exposed to the tooth portions 29 and winding the field winding 12 with strong tension.
The stator 7 (fig. 5) is formed by fitting the bobbins 10 and 11 to the divided cores 25, winding the field winding 12, and then inserting and fitting the divided cores 25 (fig. 3(c)) into each other from the rotation axis direction. At this time, since the fitting portions 35 and 36 of the bobbin 10 are also coupled together, the rigidity of the integrated stator 7 (fig. 4(c)) can be improved.
As shown in fig. 5, the fitting portions 35 and 36 of the bobbin 10 have fitting portions 35a and 35b on the fitting portion 35 side and fitting portions 36a and 36b on the fitting portion 36 side. As shown in fig. 6, the fitting portions 35a and 36a are connected to each other to connect the circumferential direction, and the fitting portions 35b and 36b are connected to each other to connect the radial direction. This integrates the teeth 29, and the rigidity of the teeth 29 can be improved.
The fitting portions 35 and 36 of the bobbin 10 are not limited to the shape shown in fig. 5, and the divided cores 25 may be inserted from the rotation axis direction, and the fitting portions 35 and 36 may firmly connect the circumferential direction and the radial direction. For example, the shape of the groove may be substantially rectangular, the shape of the protrusion may be substantially rectangular, the shape may be substantially trapezoidal, the shape may be substantially triangular, the shape may be substantially elliptical, or the like.
As shown in fig. 7, one end portions in the rotation axis direction of the fitting portions 35, 36 of the bobbin 10 are chamfered 39. Assuming that the intersection point between the fitting portions 35 and 36 and the chamfer 39 is D, the length from the other end to the intersection point D with the chamfer 39 is L1, and the thickness of the stator core 9 is L2, L1 < L2 is obtained. That is, the length in the rotation axis direction of the portion where the fitting portions 35, 36 of the bobbin 10 are connected is shorter than the thickness L2 of the stator core 9 (L1).
Thus, since the stator 7 inserts and couples the respective divided cores 25 from the rotation axis direction, the groove portions 31 and the protrusion portions 32 coupling the divided cores 25 are connected to each other before the fitting portions 35 and 36 of the bobbin 10. Further, since the end face of the bobbin 10 is formed with the chamfer 39, the fitting portions 35 and 36 of the bobbin 10 can be smoothly connected to connect the bobbins 10 to each other. Therefore, the manufacturing process of the stator 7 can be easily performed, and the productivity can be improved.
In the present embodiment, the chamfer 39 of the bobbin 10 is an R-shaped chamfer, but may be a straight chamfer or the like, as long as L1 < L2 can be set.
When the electric fan 200 is operated, an attractive force and a repulsive force are generated in the teeth 29 of the stator 7 by an electromagnetic force generated between the rotor core 6 and the teeth 29 of the stator 7, and a force that changes periodically is applied to the teeth 29 as the rotor core 6 rotates. Due to the periodically changing force, the stator core 9 vibrates, and harmonic noise (integral multiple of the rotation frequency) of the rotation frequency is likely to be generated.
In the present embodiment, the bobbins 10 and 11 are formed by strongly adhering to the stator core 9, and the fitting portions 35 and 36 can restrict the circumferential direction and the radial direction of the tooth portions 29, suppress vibration of the stator 7, and reduce harmonic noise of the rotational frequency.
Further, since the length L1 of the bobbin 10 and the thickness L2 of the stator core 9 are set to L1 < L2, and the chamfer 39 is formed on the end face of the bobbin 10, the divided cores 25 are connected first and then the bobbin 10 is connected, and therefore, the assembling property is good. Therefore, vibration generated from the stator portion 29 can be suppressed with a simple structure, and noise reduction can be achieved.
Fig. 8 is a graph of the noise reduction effect of the tooth 29 of the bobbin 10 of the present invention, which is restrained in the circumferential direction and the radial direction, and is a frequency analysis result of the operating sound. The horizontal axis represents frequency, the vertical axis represents sound pressure level, the solid line represents the result of constraining the teeth of the present embodiment, and the broken line represents the result of eliminating the constraint of the teeth. It is understood that although the noise of the rotational frequency and the noise of the harmonic of the rotational frequency become high without restricting the teeth 29, the harmonic noise is greatly reduced by restricting the teeth 29 of the stator 7 by the fitting portions 35 and 36 of the bobbin 10 of the present embodiment. As the harmonic noise becomes lower, the auditory sensation becomes better.
According to the electric fan 200 of the present embodiment described above, the stator core 9 is formed as the split core 25, so that the material yield of the electromagnetic steel sheet can be improved, and the material cost can be reduced. In addition, the winding process of winding the field winding 12 can be easily performed, and productivity can be improved. Further, since the field winding 12 is easily wound in order, the length of the field winding 12 can be shortened, and the efficiency of the electric fan 200 can be improved.
Further, by providing the caulking portions 26 on the respective divided cores 25, the rigidity of the divided cores 25 alone is improved. Further, the groove portions 32 and the protrusion portions 33 at the circumferential end portions of the respective divided cores 25 can firmly connect the divided cores 26 to each other, and welding or the like is not required, whereby the rigidity of the integrated stator core 9 can be improved.
The winding guides 34 and 37 are formed on the bobbins 10 and 11, respectively, so that the field winding 12 can be wound with strong tension while preventing the field winding 12 from being exposed to the tooth portions 29, and the divided cores 25 can be strongly adhered to and integrated with the bobbins 10 and 11.
Further, the fitting portions 35 and 36 of the bobbin 10 are connected to each other, whereby the teeth 29 can be connected in the circumferential direction and the radial direction, and the teeth 29 can be integrated. This can improve the rigidity of the tooth portion 29, suppress vibration generated from the stator portion 29 with a simple configuration, and reduce noise.
Further, since the length L1 of the bobbin 10 and the thickness L2 of the stator core 9 are set to L1 < L2, and the chamfer 39 is formed on the end face of the bobbin 10, the divided cores 25 are connected first and then the bobbin 10 is connected, so that the assembling property is good and the productivity can be improved.
Next, an electric vacuum cleaner 400 according to an embodiment of the present invention will be described with reference to fig. 9 and 10.
In the following, the case of applying the present invention to the rechargeable electric vacuum cleaner 400 that can be used by appropriately switching the stick type and the handy type will be described, but the present invention can be applied to various types of electric vacuum cleaners such as a stick-only type, a handy type, and the like.
Fig. 9 shows an electric vacuum cleaner having an electric blower according to the present embodiment mounted thereon, where fig. 9(a) is a perspective view when the electric vacuum cleaner is used in a stick type, and fig. 9(b) is a side view when the electric vacuum cleaner is used in a portable type.
As shown in fig. 9a, the electric vacuum cleaner 400 includes a dust collecting chamber 401 for collecting dust, a cleaner main body 410 of the electric fan 200 (fig. 1) for generating a suction airflow necessary for collection, a telescopic tube 402 provided to be freely telescopic with respect to the cleaner main body 410, a handle 403 provided at one end of the telescopic tube 402, and a switch 404 for opening and closing the electric fan 200 provided at the handle 403.
The electric vacuum cleaner 400 shown in fig. 9(a) is in a rod-like state, and is in a state in which the extension pipe 402 is extended. Further, a suction port body 405 is attached to the other end of the cleaner main body 410, and the cleaner main body 410 and the suction port body 405 are connected by a connecting portion 406.
The electric vacuum cleaner 400 shown in fig. 9(b) is in a hand-held state, and the extension tube 402 is housed in the cleaner main body 410, and the handle 403 is in a state of being close to the extension tube 402. Further, a carrying handle portion 407 serving as a handle in a carrying state is provided between the handle portion 403 near the upper surface side of the cleaner body 410 and the dust collection chamber 401. A suction port body (gap suction nozzle) 408 is attached to the other end of the cleaner main body 410, and the cleaner main body 410 and the suction port body 408 are connected by a connecting portion 406.
In the above-described electric vacuum cleaner 400, the electric blower 200 (see fig. 1) housed in the cleaner main body 410 is operated by operating the switch portion 404 of the handle portion 403, and a suction airflow is generated. Dust is sucked from suction bodies 405 and 408 and collected in dust collection chamber 401 of cleaner main body 410 through connection portion 406.
Fig. 10 is a longitudinal sectional view of a cleaner body on which the electric blower of the present embodiment is mounted. Fig. 10 shows a hand-held state, and the suction port body 408 is removed from the cleaner main body 410.
As shown in fig. 10, inside the cleaner body 410, there are provided an electric blower 200 generating suction force, a battery unit 420 supplying power to the electric blower 200, and a driving circuit 430.
Air sucked from the suction ports 405 and 408 (see fig. 9a and 9 b) is sent to the dust collection chamber 401 disposed in front of the electric blower 200 through the flow path 440 (see fig. 9 a) provided in the cleaner body 410, and is collected in the dust collection chamber 401. The air from which the dust is separated in dust collecting chamber 401 is discharged to the outside through an exhaust port (not shown) formed in cleaner body 410 by electric fan 200 and driving circuit 430.
By mounting the electric blower 200 of the present embodiment on the electric vacuum cleaner, the harmonic noise of the rotational frequency of the electric vacuum cleaner 100 can be reduced, and the electric vacuum cleaner with good auditory sensation can be obtained.
The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail to explain the present invention easily and understandably, and are not necessarily limited to having all the structures described. Further, a part of the structure of one embodiment may be replaced with the structure of another embodiment, or the structure of another embodiment may be added to the structure of one embodiment. Further, a part of the configuration of each embodiment may be added, deleted, or replaced with another configuration.
Description of the reference numerals
1 centrifugal impeller
2 Fan case
3 guide wing
4 rotating shaft
5 outer cover
6 rotor iron core
7 stator
8 set screw
9 stator core
10. 11 bobbin winder bracket
12 field winding
13. 14 bearing
15 spring
16 bearing cap
17 balance ring
18 sleeve
19 housing support
20 screw hole
21 set screw
22 housing opening
23 exhaust port of housing
24 cooling fin
25-segment iron core
26 riveted part
27 yoke
28 magnetic pole part
29 tooth system
30 slit part
31 groove part
32 projection part
33 through hole
34. 37 winding guide
35. 36 fitting part
38 mounting hole
39 chamfer angle
200 electric fan
201 blower part
202 motor unit
400 electric cleaner main body.
Claims (4)
1. An electric blower, comprising:
a motor having a rotor core and a stator core;
a rotating shaft provided to be rotatable;
the rotor core integrally formed in the vicinity of one end of the rotating shaft;
a rotor mounted near the other end of the rotating shaft;
a pair of bearings mounted on the rotating shaft between the rotor core and the rotor;
a housing holding the pair of bearings; and
a fan housing covering the rotor, the fan housing,
the stator core is formed by connecting a plurality of divided cores having the same shape,
the split core has an annular yoke, a magnetic pole portion protruding from the yoke to an inner diameter side, and a tooth portion formed at a tip end portion of the magnetic pole portion,
the divided cores are provided with bobbins as insulating members covering the respective divided cores, and each of the bobbins has a connecting portion connecting the teeth portions with the adjacent bobbins,
the connecting portion is a first fitting portion and a second fitting portion that are located at circumferential end portions of the bobbin that cover the teeth and connect the bobbins to each other,
a third fitting portion and a fourth fitting portion are formed on the first fitting portion side, a fifth fitting portion and a sixth fitting portion are formed on the second fitting portion side, the third fitting portion and the fifth fitting portion are connected to each other to connect the fitting portions in the circumferential direction, and the fourth fitting portion and the sixth fitting portion are connected to each other to connect the fitting portions in the radial direction,
one end of the first fitting portion and one end of the second fitting portion in the rotation axis direction are chamfered.
2. The electric blower of claim 1,
the connecting portion has a portion that contacts the tooth portion in the circumferential direction and the radial direction.
3. The electric blower of claim 1 or 2,
the length of the connection part is smaller than the thickness of the stator core.
4. An electric vacuum cleaner, characterized in that:
an electric blower according to any one of claims 1 to 3 is mounted thereon.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018128724A JP6903036B2 (en) | 2018-07-06 | 2018-07-06 | Electric blower and vacuum cleaner equipped with it |
| JP2018-128724 | 2018-07-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110680229A CN110680229A (en) | 2020-01-14 |
| CN110680229B true CN110680229B (en) | 2021-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910160379.5A Active CN110680229B (en) | 2018-07-06 | 2019-03-04 | Electric fan and electric dust collector equipped with same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6903036B2 (en) |
| CN (1) | CN110680229B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112716396B (en) * | 2021-01-09 | 2021-11-23 | 苏州简单有为科技有限公司 | Wet type cleaning device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201708A (en) * | 2010-03-26 | 2011-09-28 | 爱信精机株式会社 | Stator for rotary electrical machine |
| CN103701289A (en) * | 2012-09-27 | 2014-04-02 | 日立汽车***株式会社 | Rotating electrical machine and electric power steering system using the same |
| JP2016153636A (en) * | 2015-02-20 | 2016-08-25 | 日立アプライアンス株式会社 | Electric blower and vacuum cleaner |
| CN107005103A (en) * | 2014-12-02 | 2017-08-01 | 三菱电机株式会社 | The manufacture method of stator for electric rotating machine iron core, electric rotating machine and electric rotating machine |
| CN108730209A (en) * | 2017-04-20 | 2018-11-02 | 日立空调·家用电器株式会社 | Electric blower and the electric dust collector for being equipped with the electric blower |
-
2018
- 2018-07-06 JP JP2018128724A patent/JP6903036B2/en active Active
-
2019
- 2019-03-04 CN CN201910160379.5A patent/CN110680229B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201708A (en) * | 2010-03-26 | 2011-09-28 | 爱信精机株式会社 | Stator for rotary electrical machine |
| CN103701289A (en) * | 2012-09-27 | 2014-04-02 | 日立汽车***株式会社 | Rotating electrical machine and electric power steering system using the same |
| CN107005103A (en) * | 2014-12-02 | 2017-08-01 | 三菱电机株式会社 | The manufacture method of stator for electric rotating machine iron core, electric rotating machine and electric rotating machine |
| JP2016153636A (en) * | 2015-02-20 | 2016-08-25 | 日立アプライアンス株式会社 | Electric blower and vacuum cleaner |
| CN108730209A (en) * | 2017-04-20 | 2018-11-02 | 日立空调·家用电器株式会社 | Electric blower and the electric dust collector for being equipped with the electric blower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110680229A (en) | 2020-01-14 |
| JP6903036B2 (en) | 2021-07-14 |
| JP2020010482A (en) | 2020-01-16 |
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