JP6536054B2 - Electric blower and electric vacuum cleaner provided with the electric blower - Google Patents

Description

  The present invention relates to an electric blower, and to an electric vacuum cleaner provided with the electric blower.

  2. Description of the Related Art Conventionally, there is known an electric blower in which a centrifugal fan is fixed to a rotating shaft of an electric motor by nut fastening (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 60-252191 (page 3, FIG. 1)

  Since the electric blower rotates the centrifugal fan at high speed, vibrations occur if the rotating shaft of the motor does not rotate in a well-balanced manner, which causes noise and leads to a decrease in the performance of the electric blower.

  As a factor which worsens the balance of rotation of an electric blower, having carried out the nut stop of the metal centrifugal fan to the metal rotating shaft of an electric motor like the electric blower of patent document 1 is mentioned. The rotating shaft of the motor and the centrifugal fan are combined and fixed by nut stop while checking the levelness of the fan etc. However, the variation in assembly inevitably occurs, and the balance of the rotation of the electric blower is bad. There is a problem of becoming

  In addition, with regard to the motor blower with poor balance of rotation, post-processing such as removing or scraping is performed to achieve balance, but the frequency of post-processing is high and the workability of assembly is not good There is also a problem called.

  According to the present invention, in order to solve the problem, the rotary shaft of the motor and the centrifugal fan are integrally formed, so that variations in assembly of the rotary shaft of the separate motor and the centrifugal fan do not occur. An object of the present invention is to provide an electric blower that can be easily balanced in rotation.

An electric blower according to the present invention, which solves the problem, has a stator formed by winding a field winding around a stator core, and a rotating shaft, and an armature core and a commutator are provided on the rotating shaft. A motor comprising an armature winding and a armature connected to a commutator, and a centrifugal fan provided on a rotary shaft of the motor armature, the rotary shaft and the centrifugal fan being fiber reinforced A shroud integrally formed of a resin and formed of a fiber reinforced resin is bonded and fixed to the centrifugal fan by bonding or welding so as to cover the centrifugal fan .

  According to the present invention, since the rotational shaft of the motor and the centrifugal fan are integrally formed, there is no variation in assembly of the rotational shaft of the separate motor and the centrifugal fan, so that the rotation of the electric blower can be balanced easily. Become.

In addition, since the rotation of the electric blower can be easily balanced, the frequency of post-processing for balancing can be suppressed, and the time taken for post-processing can be shortened, so that the assembling workability of the electric blower is also improved.

It is a perspective view which shows schematic structure of the electric blower which concerns on Embodiment 1 of this invention. It is sectional drawing seen from the side direction in the position which passes along the rotation center of a centrifugal fan which shows the internal structure of the electrically-driven blower which concerns on Embodiment 1 of this invention. It is a perspective view which shows the outline of the stator of the electric blower which concerns on Embodiment 1 of this invention. (A) A perspective view showing an outline of a state in which the armature winding of the armature of the electric blower according to Embodiment 1 of the present invention is not wound; (b) Electric machine of the electric blower according to Embodiment 1 of the present invention It is a perspective view which shows the outline of a child. (A) A view of a centrifugal fan of the electric blower according to Embodiment 1 of the present invention viewed from the side direction of a member integrally formed with a rotary shaft, (b) The centrifugal fan and rotary shaft shown in FIG. (C) A member formed integrally with the centrifugal fan and the rotation shaft in FIG. 5 (a) is a side view at a position passing the rotation center of the centrifugal fan. It is sectional drawing seen from the direction. (A) The member which integrally formed the centrifugal fan and rotating shaft of the electric blower which concerns on Embodiment 1 of this invention, and the figure which looked at the shroud attached to it from the side direction, (b) The electric blower to which the shroud was attached The centrifugal fan and the member which integrally formed the rotating shaft are sectional views seen from the side direction in the position which passes along the rotation center of a centrifugal fan. (A) A schematic view showing an example of a split direction of a mold when molding a member in which a centrifugal fan and a rotary shaft are integrally formed according to Embodiment 1 of the present invention, (b) Implementation of the present invention It is a schematic diagram which shows the other example of the split direction of a metal mold | die when shape | molding the centrifugal fan of the electric blower which concerns on aspect 1, and the member which integrally formed the rotating shaft. (A) A cross-sectional view of another embodiment 1 of a member integrally formed with the centrifugal fan and the rotary shaft of the electric blower according to Embodiment 1 of the present invention, viewed from the side direction at a position passing through the rotational center of the centrifugal fan (B) A sectional view of another embodiment 2 of a member integrally formed with the centrifugal fan and the rotary shaft of the electric blower according to the first embodiment of the present invention, viewed from the side direction at a position passing through the rotational center of the centrifugal fan FIG. (A) A perspective view of a member in which a centrifugal fan and a rotary shaft are integrally formed by insert molding the electric fan according to Embodiment 2 of the present invention as viewed from the centrifugal fan (upper side), (b) FIG. 9 (a) It is sectional drawing which looked at the member which integrated the centrifugal fan and rotating shaft by insert molding from the side direction in the position which passes along the rotation center of a centrifugal fan. It is sectional drawing seen from the side direction which shows schematic structure of the vacuum cleaner of one Example equipped with the electric blower which concerns on Embodiment 1 of this invention or Embodiment 2 of this invention.

Embodiment 1
(Configuration of electric blower)
FIG. 1 is a perspective view showing a schematic configuration of the electric blower according to Embodiment 1 of the present invention, and FIG. 2 shows an internal configuration of the electric blower according to Embodiment 1 of the present invention. 3 is a perspective view schematically showing the stator of the electric blower according to Embodiment 1 of the present invention, and FIG. 4 (a) is an electric blower according to Embodiment 1 of the present invention. 4 (b) is a perspective view schematically showing the armature of the electric blower according to the first embodiment of the present invention, FIG. Fig. 5 (a) is a side view of the centrifugal fan and the member integrally formed with the rotary shaft of the electric blower according to Embodiment 1 of the present invention. Fig. 5 (b) is a centrifugal fan and the rotary shown in Fig. 5 (a). FIG. 5 (c) is a perspective view of a member in which the shaft is integrally formed, viewed from the side of the centrifugal fan (upper side), and FIG. 6 is a cross-sectional view of a member in which a core fan and a rotary shaft are integrally formed, viewed from the side direction at a position passing through the rotation center of the centrifugal fan; FIG. 6 (a) is a centrifugal fan of the electric blower according to the first embodiment of the present invention Figure 6 (b) shows a member integrally formed with a centrifugal fan and a rotating shaft of the electric blower to which the shroud is attached. It is sectional drawing seen from the side direction in the position which passes through the rotation center of a centrifugal fan.

Hereinafter, the configuration of the electric blower according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6.
In each of the drawings, the same or corresponding parts are denoted by the same reference numerals, and a part of the description may be omitted.

  Reference numeral 100 in FIG. 1 denotes an electric blower according to the first embodiment of the present invention, and the outer shell is constituted by a frame 1 and a fan cover 2. The frame 1 has a cylindrical shape and one end face is open and the other end face has a bottomed shape, and a fan cover 2 is attached so as to cover the opening.

The frame 1 and the fan cover 2 are made of metal or resin. When the frame 1 and the fan cover 2 are formed of a metal material, they are formed by drawing with a die. When the frame 1 and the fan cover 2 are formed of a resin material, they are formed by injection molding using a mold.

  The fan cover 2 is provided with a circular air inlet 2a for taking in air when the electric blower 100 is operated. The frame 1 is provided with exhaust ports 1a and 1b for discharging the intake air. In addition, the exhaust port which is not shown in figure other than 1a and 1b is provided.

  Inside the frame 1 and the fan cover 2, a stator 3 and an armature 6 for operating the electric blower 100 are disposed. As shown in FIG. 3, the stator 3 mainly includes a stator core 4 and a field winding 5, and the field winding 5 is wound around the stator core 4. The stator 3 is fixed to the frame 1 in a state in which the field winding 5 is wound around the stator core 4.

The stator core 4 is not shown but a thin magnetic steel sheet (for example, about 0.1 to 1.0 mm thick) is punched into the same shape with a mold and laminated in a plurality until a predetermined thickness is achieved. It is formed by The field winding 5 is a wire of a predetermined wire diameter having conductivity, such as a copper wire, for example.

  Next, as shown in FIG. 4, the armature 6 mainly includes a rotating shaft 7 a, an armature core 8, a commutator 9, and an armature winding 10. As shown in FIG. 4 (a), the armature winding 10 is wound around a circular armature core 8 to form the shape shown in FIG. 4 (b).

  Similarly to the stator core 4, the armature core 8 is punched out of thin electromagnetic steel plates (for example, about 0.1 to 1.0 mm thick) with the mold into the same shape, until a predetermined thickness is reached. It is formed by laminating one on another.

  The armature core 8 is fixed to the rotating shaft 7a. The armature winding 10 is wound around an armature core 8 with an insulating member (not shown) interposed therebetween, and is connected to a commutator 9 fixed to the rotation shaft 7 a in the same manner as the armature core 8. The armature winding 10 is also a wire of a predetermined wire diameter having conductivity such as a copper wire as the field winding 5 although the wire diameter is different.

  As shown in FIG. 2, the rotary shaft 7a of the armature 6 is rotatably supported by bearings 14a and 14b. The bearing 14a is attached to the bearing holding portion 12a of the fixing member 12 that fixes the armature 6 to the frame 1 via the bearing 14a. By fixing the fixing member 12 to the frame 1, the position above the rotation shaft 7 a of the armature 2 is determined.

  The rotating shaft 7a is integrally formed with the centrifugal fan 7b, and constitutes an integrally formed member 7 of the rotating shaft and the centrifugal fan. A shroud 15 is attached to the centrifugal fan 7b. The rotating shaft 7a and the centrifugal fan 7b will be described in detail later.

  A fan cover 2 is attached to the frame 1 so as to surround the centrifugal fan 7b to which the shroud 15 is attached. The fan cover 2 is provided with a seal member groove 2b around the entire circumference of the circular air inlet 2a.

  A seal member 16 is provided in the seal member groove 2b as shown in FIG. Although the seal member 16 is not shown, it is provided over the entire periphery of the seal member groove 2b. The sealing member 16 is made of, for example, an ultraviolet curable silicone resin that can be cured by irradiation with ultraviolet light. Since this resin is a silicone as a main component, it is excellent in heat resistance and heat cycle property, and becomes a cured product having rubber elasticity after curing.

The seal member 16 fills the space between the upper end 15 a (see FIG. 6) of the shroud 15 and the fan cover 2. It is desirable that the upper end 15a of the shroud 15 and the fan cover 2 be in contact without any gap.

In order to ensure the performance of the electric blower 100, all the air sucked from the air inlet 2a is originally introduced into the centrifugal fan 7b from the shroud opening 15b (see FIG. 6) of the shroud 15. When there is a gap between the upper end 15a and the fan cover 2, a part of the air sucked from the air inlet 2a flows into the gap between the fan cover 2 and the upper surface of the shroud 15 to reduce the efficiency of the electric blower 100. I will.

In addition, the air sent out by the centrifugal fan 7b flows into the gap between the fan cover 2 and the upper surface of the shroud 15 and is cut off, so that the efficiency of the electric blower 100 also decreases.

When the upper end 15a of the shroud 15 and the fan cover 2 are brought into close contact with each other, when the two are brought into direct contact, the fan cover 2 is fixed and the centrifugal fan 7b to which the shroud 15 is attached rotates at high speed. May occur and cause noise. In addition, wear of the shroud 15 may be promoted by the friction, which may cause a problem in the electric blower 100.

Therefore, the upper end 15a of the shroud 15 is brought into contact with the fan cover 2 via the elastic seal member 16 to ensure the efficiency of the electric blower 100 and to suppress the occurrence of a defect.

  The bearing 14 b is fixed to the rotating shaft 7 a in the same manner as the armature core 8. By inserting and fixing the bearing 14 b in the bearing holding portion 1 c provided at the bottom of the frame 1, the lower position of the rotary shaft 7 a of the armature 2 is determined.

  The armature 6 thus mounted is rotatably disposed inside the armature core 4 by bearings 14 a and 14 b.

  Further, brushes 11a and 11b are attached to the frame 1 and abut on the commutator 9 by a biasing member such as a spring (not shown). A current is supplied from the brush 3 to the commutator 9 to rotate the armature 2 to generate a rotational force of the electric blower 100.

  Then, the straightening vane 13 is attached to the lower space of the centrifugal fan 7b. The straightening vanes 13 are guide vanes for guiding the air taken by the centrifugal fan 7 b into the inside of the frame 1.

(Configuration of rotary shaft and centrifugal fan)
As shown in FIG. 5, the centrifugal fan 7b and the rotary shaft 7a are an integrally formed member 7 of the rotary shaft and the centrifugal fan which are integrally formed. The integrally formed member 7 of the rotary shaft and the centrifugal fan uses a fiber reinforced resin as a main material, and is integrally formed by injection molding using a mold. By integrally molding, as compared with a conventional centrifugal fan and rotary shaft assembly in which the centrifugal fan is nut-fixed to the rotary shaft, imbalance in rotation of the centrifugal fan due to variations during assembly can be suppressed, and the centrifugal fan Makes it easy to balance the rotation of the

A fiber reinforced resin is, for example, a resin material containing fibers such as carbon (carbon) fibers. By containing fibers, it becomes high in strength, and has excellent properties against abrasion etc. From this point of view, it is possible to replace the part molded with the fiber reinforced resin with a part formed with a metal material. Thus, when it substitutes with the components formed with a metal material, since specific gravity becomes lighter than a metal, weight reduction can be achieved.

  The centrifugal fan 7b has a fan bottom surface 7c and a blade shape of 21a to 21h. The blade shapes 21a to 21h have the same shape, and are provided so as to spiral upward from the horizontal fan bottom surface 7c upward, at equal intervals, from the inside to the outside, and to gradually decrease in height. ing.

  Since the centrifugal fan 7b does not function as a fan to suck in air as it is, parts for covering the blade shapes 21a to 21h and sandwiching the fan bottom surface 7c and the blade shapes 21a to 21h are required to function as fans. . Therefore, as shown in FIG. 6, the shroud 15 is attached. The shroud 15 is also formed by injection molding of fiber reinforced resin.

The shroud 15 is like an umbrella whose height gradually decreases from the inside to the outside so as to follow the blade shapes 21a to 21h provided so that the height gradually decreases from the inside to the outside. It is shaped and configured to contact the upper ends of the respective full lengths of the vane shapes 21a to 21h.

The centrifugal fan 7b and the shroud 15 are joined and fixed by a bonding method such as adhesion or welding at a point where the centrifugal fan 7b and the shroud 15 are in contact with the upper ends of the full lengths of the blade shapes 21a to 21h.

Further, on the side of the fan bottom surface 7c on which the blade shapes 21a to 21h are formed, a protrusion shape 7d is provided at a central portion including the rotation center of the centrifugal fan 7b. The protrusion shape 7d protrudes at a lower height than the highest position of the blade shapes 21a to 21h.

The projection shape 7d is formed so as to expand gradually from the highest position toward the fan bottom surface 7c. In the present embodiment, the curve is expanded while gradually decreasing. However, the curve may be expanded while gradually decreasing.

By forming in this way, the air taken in from the intake port 2a is shown in FIG. 6 (b),
The air is sucked through the shroud opening 15b of the shroud 15 into the centrifugal fan 7b to which the shroud 15 is attached, and the sucked air smoothly flows in the centrifugal direction, and pressure loss and the like can be suppressed.

  Next, on the back side of the horizontal fan bottom surface 7c on which the blade shapes 21a to 21h are provided, the rotation shaft 7a has the same center of rotation from the horizontal fan bottom surface 7c to the rotation shaft 7a. It is vertically formed at a position on the line.

The rotating shaft 7a is rotatably supported by the bearings 14a and 14b. Therefore, in order to obtain stable rotation, at least from the starting point of the shaft starting from the fan bottom surface 7c to the position where the bearing 14b is fixed There is a need to.

Therefore, the rotation shaft 7a is directed from the starting point of the rotation shaft 7a to the tip of the rotation shaft 7a of the fan bottom surface 7c (rear surface) on which the rotation shaft 7a is provided, and its outer periphery is against the fan bottom surface 7c (rear surface) It is formed not to be inclined.

As shown in FIG. 7A when injection molding of the integrally formed member 7 of the rotary shaft and the centrifugal fan is performed so that the outer periphery of the rotary shaft 7a is not inclined with respect to the fan bottom surface 7c. The mold for injection molding is divided into directions of A, B and C respectively.

The B direction and the C direction are such that the mold alignment position is the same as the center line of the rotation shaft 7a. Since the diameter of the rotary shaft 7a can be made the same and dimensional accuracy can be ensured by dividing the mold in this manner, the outer periphery of the rotary shaft 7a is formed so as not to be inclined with respect to the fan bottom surface 7c (rear surface). it can.

  There is also a method of dividing the mold in the D direction and the E direction shown in FIG. 7B, but in order to form the outer periphery of the rotating shaft 7a not to be inclined with respect to the fan bottom surface 7c (rear surface) 7a can not be drafted.

If the rotating shaft 7a is removed from the mold without any problem with this configuration, this may be as it is. However, in the case of poor removal, it is necessary to remove the end of the rotary shaft 7a from the mold by pushing it with a pipe-like ejector pin. However, since there is a possibility that the rotary shaft 7a may be deformed when protruding with a pin in this manner, it is necessary to put a core metal in the center of the rotary shaft 7a to prevent the deformation.

Therefore, when the tip of the rotary shaft 7a is to be removed from the mold by pushing the end of the rotary shaft 7a with a pipe-like ejector pin by the method of dividing the mold in the D direction and the E direction shown in FIG. Since the cored bar fixed to the mold is placed at the center of the mold, as shown in FIGS. 8A and 8B, a hollow cored core is formed at the center of the rotating shaft 7a. For example, if the diameter of the rotating shaft 7a is φ8 mm, a cored bar that can make a cavity with a diameter of around 3 mm is inserted.

For example, in FIG. 8A, the cavity 22 is formed at the center of the rotation axis 7a. The cavity 22 extends from the rotation shaft 7a to the inside of the protrusion 7d, and a bag 23 having a part of the resin is formed at the tip of the protrusion 7d.

Moreover, in FIG.8 (b), the cavity 24 is formed in the center of the rotating shaft 7a. The cavity 24 extends from the rotation shaft 7a to the tip of the projection 7d and penetrates.

As described above, when the end of the rotary shaft 7a is removed from the mold by pushing it with a pipe-like push-out pin, the cored bar is put in the center of the rotary shaft 7a, so the cored bar is centered on the rotary shaft 7a. Although the hollowed out can be made, the deformation of the rotary shaft 7a can be suppressed by this, and the diameter of the rotary shaft 7a can be made the same to secure the dimensional accuracy.

  To explain the outline of the assembling procedure of the electric fan 100 described so far, first, the stator 3 is attached and fixed to the frame 1. The attachment to the frame 1 side is temporarily finished here, and then the bearing 14 a is attached to the bearing holding portion 12 a of the fixing member 12. Thereafter, the fixing member 12 and the straightening vanes 13 are fixed by fixing means such as screws not shown.

Next, the rotating shaft 7a integrally formed with the centrifugal fan 7b to which the shroud 15 is attached is inserted from the straightening vane 13 side to the bearing 14a. Thereafter, the armature core 8 and the commutator 9 are inserted into and fixed to the rotary shaft 7a, the armature winding 10 is wound around the armature core 8, and the armature winding 10 is connected to the commutator 9. Further, after that, the bearing 14b is inserted and fixed near the tip of the rotary shaft 7a.

After that, on the frame 1 to which the stator 3 is attached, the rotating shaft 7a integrally formed with the fixing member 12, the straightening vanes 13, the bearing 14a, and the centrifugal fan 7b to which the shroud 15 is attached; The assembly of the armature core 8, the commutator 9 and the bearing 14b connected by the wire 10 is assembled such that the bearing 14b is inserted into the bearing holding portion 1c provided at the bottom of the frame 1.

  Next, the frame 1 and the fixing member 12 are fixed by a not-shown fastening member such as a screw. At this time, the screw is tightened from the frame 1 side toward the fixing member 12 side. Thereafter, the brushes 11a and 11b are attached to the frame 1 so as to abut on the commutator 9 with an urging member (not shown).

And finally, the fan cover 2 is attached so that the centrifugal fan 7b to which the shroud 15 was attached may be covered, and the electric blower 100 is completed.

In the electric fan assembled as described above, since the rotating shaft of the electric fan and the centrifugal fan are integrally formed using a fiber reinforced resin, unbalance in the rotation of the centrifugal fan due to variations during assembly can be suppressed, and the centrifugal fan Makes it easy to balance the rotation of the

Therefore, it is possible to shorten the time required for post-processing to correct the unbalance of the rotation of the centrifugal fan, and to reduce the time required for assembling the electric blower, thereby suppressing the assembly cost. Assemblability can be improved.

Furthermore, since the rotary shaft of the electric blower and the centrifugal fan are integrally formed of fiber reinforced resin, the weight is reduced compared to the rotary shaft and the centrifugal fan formed of metal material, so the weight of the electric blower as a whole is reduced. Can be implemented.

Second Embodiment
(Configuration of rotary shaft and centrifugal fan)
The electric blower according to the second embodiment of the present invention differs from the electric blower according to the first embodiment of the present invention in the configuration of the rotary shaft and the centrifugal fan, except for the electric blower according to the first embodiment of the present invention and It is the same composition. Therefore, the difference from the electric blower according to the first embodiment of the present invention will be described here, and the description other than that will be omitted.

Fig.9 (a) is the perspective view which looked at the member which united the centrifugal fan and rotating shaft by insert molding of the electric blower concerning Embodiment 2 of this invention from the centrifugal fan (upper) side, FIG.9 (b) FIG. 9 is a cross-sectional view of a member in which the centrifugal fan and the rotational shaft are integrated by insert molding in FIG. 9A as viewed from the side at a position passing through the rotational center of the centrifugal fan.
Hereinafter, the configuration of the rotary shaft and the centrifugal fan of the electric blower according to Embodiment 2 of the present invention will be described with reference to FIGS. 9 (a) and 9 (b).

  Reference numeral 31 denotes an insert-formed integral member of a metal rotary shaft and a centrifugal fan. The centrifugal fan 31b is formed by resin molding, and the metal rotating shaft 31a is formed by metal processing. When injection molding is performed on a centrifugal fan 31b which is a resin, the metal rotating shaft 31a is inserted into a mold, and the resin is fixed to the metal rotating shaft 31a, and the centrifugal fan integrated with the metal rotating shaft 31a 31b is being molded. For the main material of the centrifugal fan 31b, for example, a fiber reinforced resin containing fibers such as carbon (carbon) fibers is used.

  As shown to Fig.9 (a), the centrifugal fan 31b is comprised by the fan bottom face 31c, and the blade | wing shape of 41a to 41h. The blade shapes 41a to 41h have the same shape, and are provided so as to spiral upward from the horizontal fan bottom surface 31c upward, at equal intervals, from the inside to the outside, and to gradually decrease in height. ing.

  Further, on the side of the fan bottom surface 31c on which the blade shapes 41a to 41h are formed, a projection shape 31d is provided at a central portion including the rotation center of the centrifugal fan 31b. Further, as shown in FIG. 9 (b), the metal rotary shaft 31a penetrates to the same height as the projection shape 31d, on the side where the blade shapes 41a to 41h are formed, and constitutes a part of the projection shape 31d. doing.

The projection shape 31d protrudes at a lower height than the highest position of the blade shapes 41a to 41h. The projection shape 31 d is formed to expand from the highest position toward the fan bottom surface 31 c while gradually lowering. In the same manner as in the first embodiment of the present invention, the curve is made to spread gradually while being lowered, but it may be made to spread while being gradually lowered by a straight line.

By forming in this manner, as in the first embodiment of the present invention, the air smoothly flows in the centrifugal fan 31b to which the shroud 15 is attached, and a pressure loss and the like can be suppressed.

In the electric blower assembled as described above, the metal rotating shaft and the centrifugal fan of the electric blower are formed as an integral member by insert molding the metal rotating shaft using a fiber reinforced resin in the centrifugal fan, so the embodiment of the present invention As in the first aspect, it is possible to suppress the imbalance in the rotation of the centrifugal fan due to the dispersion at the time of assembly, and it becomes easy to balance the rotation of the centrifugal fan.

Therefore, as in the first embodiment of the present invention, it is possible to shorten the working time for post-processing to correct the imbalance in rotation of the centrifugal fan, and to reduce the time required for assembling the electric blower. As a result, the assembly workability can be improved while suppressing the assembly cost.

Furthermore, since the centrifugal fan of the electric blower is formed using a fiber reinforced resin, the weight is reduced as compared with the centrifugal fan formed of a metal material, so that the weight of the electric blower as a whole can be reduced.

(Configuration of vacuum cleaner)
FIG. 10 is a cross-sectional view showing a schematic configuration of an electric vacuum cleaner of an embodiment equipped with the electric blower according to Embodiment 1 of the present invention or Embodiment 2 of the present invention as viewed from the side.
The schematic configuration of an electric vacuum cleaner according to one embodiment equipped with the electric fan according to the first embodiment of the present invention or the second embodiment of the present invention will be described below with reference to FIG.

  As shown in FIG. 10, reference numeral 200 denotes an electric vacuum cleaner according to the embodiment mounted with the electric blower according to Embodiment 1 of the present invention or Embodiment 2 of the present invention. The control board 52 has the electric blower 100 according to the first embodiment of the present invention or the second embodiment of the present invention, and a cord reel of a power cord (not shown).

Further, although not shown, a hose body for suctioning dust, which is constituted by a suction tool, a soft pipe portion and a hard pipe portion, is inserted into the hose body insertion port 56.

  The dust collection container 51 is for collecting suctioned dust, and there are a type using a dust collection bag and a type not using a dust collection bag such as a cyclone type, and the vacuum cleaner 200 of the present invention The electric vacuum cleaner according to the first embodiment or the electric blower according to the second embodiment of the present invention is mounted, so either may be used, and the present invention is not limited to the type of the dust collection container. The electric blower according to the first embodiment of the present invention or the second embodiment of the present invention can be mounted.

  The control board 52 controls the drive of the electric blower 100 in order to suction dust by the operation of an operation unit (not shown).

  A wheel 53 is provided on the side surface of the main body 50, and a caster 54 is provided on the lower surface. The wheels 53 and the casters 54 allow the main unit 50 to be routed. The handle 55 is for carrying the main body 50.

As a matter of course, the electric vacuum cleaner 200 can be equipped with the electric blower 100 according to Embodiment 1 of the present invention or Embodiment 2 of the present invention even if, for example, a handy type does not use a hose body. The installation is not limited by the form of the machine.

(Operation of vacuum cleaner)
When the electric blower 100 contained in the electric vacuum cleaner 100 as described above is driven, air is sucked by the electric blower 100, and air containing dust can be suctioned by a not-shown hose body. The suctioned air containing dust is separated into dust and air in the dust collection container 51, dust is accumulated, and the dust-removed air is discharged to the outside of the main body 50 through the electric blower 100.

  As described above, the electric vacuum cleaner is integrally provided with the rotary shaft and the centrifugal fan by using the fiber reinforced resin, or the centrifugal fan is formed by using the fiber reinforced resin. The weight of the entire vacuum cleaner can be reduced, and the burden on carrying and handling the vacuum cleaner can be reduced.

  A mold split direction, B mold split direction, C mold split direction, D mold split direction, E mold split direction, 1 frame, 1a exhaust port, 1b exhaust port, 1c bearing holder , 2 fan cover, 2a intake port, 2b seal member groove, 3 stator, 4 stator core, 5 field winding, 6 armature, 7 integrally formed member of rotating shaft and centrifugal fan, 7a rotating shaft, 7b Centrifugal fan, 7c fan bottom surface, 7d protrusion shape, 8 armature core, 9 commutator, 10 armature winding, 11a brush, 11b brush, 12 fixing member, 12a bearing holding portion, 13 straightening vane, 14a bearing, 14b bearing , 15 shroud, 15a shroud upper end, 15b shroud opening, 16 seal member, 21a blade shape, 21b blade shape, 21c blade shape, 21d blade shape, 21e blade shape, 1f blade shape, 21g blade shape, 21h blade shape, 22 cavity, 23 bag shape, 24 cavity, 31 insert forming integral member of metal rotating shaft and centrifugal fan, 31a metal material rotating shaft, 31b resin material centrifugal fan, 31c Fan bottom, 31d projection shape, 41a blade shape, 41b blade shape, 41c blade shape, 41d blade shape, 41e blade shape, 41f blade shape, 41g blade shape, 41h blade shape, 50 cleaner body, 51 dust collection container, 52 Control board, 53 wheels, 54 casters, 55 handles, 56 hose body insertion openings, 100 electric blowers, 200 electric vacuum cleaners.

Claims (7)

A stator comprising a field winding wound around a stator core, and a rotating shaft, and an armature core and a commutator provided on the rotating shaft, the armature winding wound around the armature core and the above A motor comprising an armature to which a commutator is connected;
A centrifugal fan provided on the rotation shaft of the armature of the motor;
The rotary shaft and the centrifugal fan are integrally formed of a fiber reinforced resin, and a shroud formed of a fiber reinforced resin is bonded and fixed to the centrifugal fan by adhesion or welding so as to cover the centrifugal fan. Electric blower with features. The centrifugal fan has a fan bottom surface having a plurality of blade shapes on one side, and the rotation center of the centrifugal fan and the axial center of the rotation axis are vertical on the back side of the fan bottom surface having the plurality of blade shapes Comprising the rotation axis at a position colinear with the direction,
The highest position of the plurality of blade shapes in the same direction as the direction in which the plurality of blade shapes extend in the central portion including the rotation center of the centrifugal fan on one surface side including the plurality of blade shapes of the fan bottom The motor-driven blower according to claim 1, further comprising: a protruding projection having a height lower than that of the fan, wherein the projection is formed to gradually expand toward one surface of the bottom surface of the fan. .   The rotary shaft is characterized in that its outer periphery is not inclined with respect to the rear surface of the fan bottom surface from the rear surface of the fan bottom surface on which the rotary shaft is provided toward the tip of the rotary shaft. The electric blower according to 2.   The motor-driven blower according to any one of claims 1 to 3, wherein the rotating shaft is formed so that the inside of the shaft is hollow. The stator has a stator formed by winding a field winding around a stator core, and a rotating shaft formed of a metal material, and an armature core and a commutator are provided on the rotating shaft, and wound around the armature core. An electric motor comprising an armature winding and an armature formed by connecting the commutator;
And a centrifugal fan formed of a fiber reinforced resin provided on the rotating shaft of the motor.
When the centrifugal fan is injection molded, the rotary shaft is inserted to integrally form the rotary shaft and the centrifugal fan, and a shroud formed of a fiber reinforced resin is bonded or welded so as to cover the centrifugal fan. A motor-driven blower characterized by being joined and fixed to the centrifugal fan .   The said fiber reinforced resin is carbon fiber reinforced resin, The electric blower in any one of the Claims 1-5 characterized by the above-mentioned.   An electric vacuum cleaner comprising the electric motor according to any one of claims 1 to 6.

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