JP2010213789A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner which can reduce the rotation vibration and noise of a motor fan. <P>SOLUTION: The motor fan 31 equipped with a fan 48 and an electric motor part 32 is supported by first and second support means 11 and 21 within a cleaner body 2. The fan 48 has a larger diameter than the maximum diameter of a rotor 39, which the electric motor part 32 has, and this fan 48 is attached to one end part of a rotor axis 40. The first support means 11 supports a bearing housing part 34 on the cleaner body 2. The second support means 21 is prepared so as to divide the electric motor part 32 and the fan 48 and supports a bearing housing part 35 on the cleaner body 2. The second support means 21 has a cover mounting part 27, which has a larger diameter than the fan 48, and a ventilation part 28 through which air cooling the electric motor part 32 passes. A fan cover 51, which covers the fan 48 and holds the fan 48 between it and the second support means 21, is supported by the cover mounting part 27. A gap G is formed between the outer periphery of the fan cover 51 and the inside of the cleaner body 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner designed to reduce noise.

  Support rubber was attached to both front and rear ends of the electric blower having an impeller larger in diameter than the maximum diameter of the rotor, and the electric blower was fixed to the electric blower chamber of the vacuum cleaner body through these support rubbers. A vacuum cleaner is known as a prior art (for example, refer patent document 1).

  In this conventional vacuum cleaner, the front support rubber is fitted on the outer periphery of a casing containing an impeller positioned in front of the front bearing. The rear support rubber is fitted on the outer periphery of the rear bearing housing part that protrudes rearward from the rear center part of the electric motor case of the electric blower, and the rear bearing is supported in the rear bearing housing part. . Therefore, in the conventional vacuum cleaner, the rotating body having the rotor and the impeller is rotated along with the operation of the electric blower, and the vibration generated due to the rotational imbalance of the rotating body (this vibration is hereinafter referred to as the vibration). Can be damped by the front and rear support rubbers.

Japanese Patent Laying-Open No. 2007-185413 (paragraphs 0021-0022, FIGS. 1-2)

  As a result of earnest research on the rotational vibration, the present inventor has found that the rotational vibration in the configuration where the impeller is larger than the maximum diameter of the roller is dominated by the rotational unbalance of the impeller. I found out that it shook.

  Because of this phenomenon, the entire electric blower sways in the same manner as the rotating body. Therefore, in the conventional vacuum cleaner, the rotational vibration of the casing having a larger diameter than the impeller disposed farthest from the rear bearing housing portion is larger. . Due to this rotational vibration, the conventional vacuum cleaner tends to generate a harsh treble. By the way, in the test results on the relationship between the driving sound (noise) and the frequency (number of rotations) conducted by the present inventor, a phenomenon in which the peak value of noise occurs at a frequency of 500 Hz as shown in FIG. 3 is recognized. It was.

  As described above, the conventional vacuum cleaner has a problem that the rotational vibration of the electric blower and the accompanying noise are large.

  In order to solve the above-mentioned problems, the present invention comprises a motor part having a rotor and a fan having a diameter larger than the maximum diameter of the rotor and attached to one end of the rotor shaft. The first and second support means for supporting the electric blower that is air-cooled in the cleaner body, and the bearing housing portion of the motor portion that is located farther from the fan by the first support means. The second support means is provided so as to partition the motor part and the fan, and is positioned closer to the fan by the second support means. The cover housing portion is supported by the vacuum cleaner main body, and a cover mounting portion having a diameter larger than that of the fan is provided in the second support means. The cover mounting portion covers the fan and is between the second support means. Fan cover to accommodate fans Supporting the is characterized in that a gap between the inner surface of the outer periphery and the vacuum cleaner body of the fan cover. In the present invention, a commutator motor, an inverter motor, or the like can be used for the motor unit.

  In the present invention, the second support means includes a base portion integrally formed on the inner surface of the cleaner body, and an elastic body disposed between the base portion and the second bearing housing portion. It is preferable. In this case, rubber or a coil spring can be used as the elastic body.

  In the present invention, the motor portion has a ventilation inlet in a wall portion facing the second support means, and the ventilation portion is provided in a portion of the second support means facing the wall portion. It is preferable that a guide for guiding the air that has passed through the ventilation portion to the ventilation inlet is provided between the wall portion and the portion. In this case, the guide may protrude from the portion toward the wall portion, or conversely, may protrude from the wall portion toward the portion. Alternatively, by using a guide composed of a ring sandwiched between the wall and the part, air can be prevented from leaking outside the motor part without passing through the ventilation inlet between the wall and the part. There is no problem even if the air passing through the section is guided to the ventilation inlet.

  According to the present invention, the bearing housing part positioned closer to the fan of the motor part is supported by the cleaner body, and the outer periphery of the fan cover is not supported by the cleaner body. There is an effect that it is possible to suppress the rotational vibration of the electric blower having the bearing housing portion positioned at a far side as a fulcrum and to operate with low noise.

It is a schematic sectional drawing which shows a part of vacuum cleaner which concerns on the 1st Embodiment of this invention. It is sectional drawing shown along the arrow F2-F2 line | wire in FIG. 1 in the state which abbreviate | omitted the fan and the fan cover. The graph which compares and shows the relationship between the frequency and driving | running | working sound in the vacuum cleaner of FIG. 1, and the conventional vacuum cleaner. It is a schematic sectional drawing which shows a part of vacuum cleaner which concerns on the 2nd Embodiment of this invention. It is a schematic sectional drawing which shows a part of vacuum cleaner which concerns on the 3rd Embodiment of this invention. FIG. 6 is a cross-sectional view taken along line F6-F6 in FIG. 5 with the fan and fan cover omitted. It is a schematic sectional drawing which shows a part of vacuum cleaner which concerns on the 4th Embodiment of this invention. It is sectional drawing shown along the arrow F8-F8 line | wire in FIG. 7 in the state which abbreviate | omitted the fan and the fan cover.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.

  Reference numeral 1 in FIG. 1 indicates a vacuum cleaner. A vacuum cleaner main body 2 provided in the electric vacuum cleaner 1 has a pair of main body cases, for example, an upper main body case 3 and a lower main body case 4. The upper main body case 3 and the lower main body case 4 are combined in the vertical direction and connected by screws (not shown).

  A partition 5 is provided at an intermediate portion in the front-rear direction in the cleaner body 2, and a first support means 11 is provided at a rear end portion in the cleaner body 2. The vacuum cleaner body 2 has a dust collector arrangement chamber 2a, an electric blower chamber 2b, and an exhaust chamber 2c.

  The dust collector arrangement chamber 2 a is formed on the front side of the partition 5. A dust suction port (not shown) is provided at the front end of the cleaner body 2 so as to communicate with the dust collector arrangement chamber 2a. A dust suction hose (not shown) is connected to the dust suction port, and a floor suction port body is connected to the dust suction hose via an extension tube. Dust-containing air is sucked into the dust suction port through these dust suction parts. . The dust collector 6 is detachably accommodated in the dust collector arrangement chamber 2a from above. The dust collector 6 may be a dust collection bag or a dust collection unit that performs cyclone-type dust separation and accumulates the separated dust.

  The electric blower chamber 2b is a downstream chamber with respect to the dust collector arrangement chamber 2a, and is formed on the rear side of the partition 5 and between the partition 5 and first support means 11 described later. The electric blower chamber 2 b is communicated with the dust collector arrangement chamber 2 a through a plurality of vent holes 5 a formed in substantially the entire area of the partition 5.

  The exhaust chamber 2c is a downstream chamber with respect to the electric blower chamber 2b, and is formed between the electric blower chamber 2b and the main body rear wall 2d of the cleaner body 2. The exhaust chamber 2 c communicates with the electric blower chamber 2 b through an air circulation hole 7 provided in the first support means 11. The air circulation hole 7 is opened in, for example, a lower portion of the first support means 11, specifically, a lower support wall 13 described later. The exhaust chamber 2 c communicates with the outside of the cleaner body 2 through the exhaust hole 8. For example, a plurality of exhaust holes 8 are provided in the upper portion of the main body rear wall 2d.

  The first support means 11 is, for example, an upper support wall 12 forming one support wall integrally projecting on the inner surface of the upper main body case 3, and correspondingly projecting integrally on the inner surface of the lower main body case 4. And the lower support wall 13 forming the other support wall. The top ends of the upper support wall 12 and the lower support wall 13 are abutted in the vertical direction. Thereby, the 1st support means 11 has partitioned off the electric blower chamber 2b and the exhaust chamber 2c. Each of the upper support wall 12 and the lower support wall 13 has semicircular clamping edges 12a and 13a. These sandwiching edge portions 12a are continuous in a circle when the first support means 11 is viewed from the front or the rear. The first support means 11 includes a support wall having a semicircular clamping edge portion 13a and a clamping member used in place of the upper support wall, that is, a semicircular clamping portion and a clamping edge portion 13a. It can also be formed with a clamping member that is screwed to the head.

  The second support means 21 is provided in the electric blower chamber 2b. The second support means 21 includes a pair, for example, a pair of upper and lower base portions 22, 23, an elastic body, for example, a vibration isolation ring 24 made of rubber, and a support member 25.

  Specifically, as shown in FIGS. 1 and 2, the upper base portion 22 projects integrally with the inner surface of the upper body case 3, and the lower base portion 23 projects integrally with the inner surface of the lower body case 4. . These base portions 22 and 23 have semicircular grooves (not shown) that are continuous in a circular shape when the second support means 21 is viewed from the front or the rear, and the tips that continue to the grooves are in the vertical direction. It has been matched. Thereby, the 2nd support means 21 has divided electric fan room 2b into electric part room 2e and fan room 2f.

  The anti-vibration ring 24 has an outer peripheral groove 24a opened on the outer periphery and an inner peripheral groove 24b opened on the inner periphery. The anti-vibration ring 24 is attached between the base portions 22 and 23 by fitting the outer peripheral groove 24 a to the edge of the circular hole formed by the semicircular grooves of the base portions 22 and 23.

  The support member 25 is circular when the second support means 21 is viewed from the front or rear. The support member 25 is attached in the vibration isolation ring 24 by fitting the outer peripheral portion thereof to the inner peripheral groove 24 b of the vibration isolation ring 24. In other words, the anti-vibration ring 24 having elasticity is sandwiched between the upper and lower base portions 22 and 23 and the support member 25, and accordingly, between the upper and lower base portions 22 and 23 via the anti-vibration ring 24. A support member 25 is attached to the head.

  The support member 25 has a fitting portion 26, a cover attachment portion 27, and a ventilation portion 28.

  The fitting part 26 is formed in the center part of the support member 25. The fitting portion 26 has a cylindrical shape, but may be a circular hole. The cover attaching portion 27 is provided close to the outer periphery of the support member 25, has a circular shape as shown in FIG. 2, and protrudes toward the partition 5 as shown in FIG. 1, for example. The circular cover mounting portion 27 has a larger diameter than the fan 48 described later. The ventilation part 28 consists of a through-hole opened in the site | part 25a between the fitting part 26 and the cover attachment part 27, and is provided with two or more as shown in FIG.

  As shown in FIG. 1, the electric blower 31 is supported by the first support means 11 and the second support means 21 and is built in the electric blower chamber 2 b of the cleaner body 2. The electric blower 31 includes an electric motor unit 32 made of, for example, a commutator electric motor, a centrifugal fan 48, and a fan cover 51, for example.

  The electric motor unit 32 includes an electric motor case 33, a stator 36, a pair of bearings 37 and 38, a rotor 39, a commutator 41, a pair of brush devices 42, and the like.

  The motor case 33 is formed by combining a pair of case members having the first bearing housing portion 34 or the second bearing housing portion 35. The electric motor case 33 has a pair of wall portions 33a and 33b. A first bearing housing portion 34 is formed at the center portion of one wall portion 33a so as to protrude outside the motor case 33, and similarly, a second bearing housing is protruded outside the motor case 33 at the center portion of the other wall portion 33b. A portion 35 is formed. The protruding directions of the first bearing housing part 34 and the second bearing housing part 35 are opposite to each other.

  A stator 36 is fixed to the inner peripheral surface of the motor case 33. Bearings 37 and 38 such as ball bearings are supported in the pair of bearing housing portions 34 and 35, respectively.

  The rotor 39 has a rotor shaft 40 at the center thereof. The rotor shaft 40 is rotatably supported by bearings 37 and 38, whereby a rotor 39 is disposed inside the stator 36. One end of the rotor shaft 40 penetrates the bearing 38 and protrudes out of the motor case 33.

  The commutator 41 is fixed to the rotor shaft 40 while moving toward the bearing 37. The pair of brush devices 42 are attached to the electric motor case 33, and the carbon brushes 42 a that they have are pressed against the outer periphery of the commutator 41 by a spring (not shown).

  The motor case 33 has a ventilation inlet 43 and a ventilation outlet 44 for circulating the wind sent from the fan. That is, a plurality of ventilation inlets 43 are opened in the wall 33b from which the second bearing housing part 35 is projected, and a plurality of ventilation outlets 44 are opened in the wall 33a from which the first bearing housing part 34 is projected. ing. The ventilation outlet 44 can be provided close to the wall 33a in the peripheral wall of the motor case 33, or may be provided on both the peripheral wall and the wall 33a.

  A fan receiving plate 46 is fixed to one end portion of the rotor shaft 40 protruding outside the motor case 33 so as not to move in the axial direction of the rotor shaft 40, and is screwed to one end portion of the rotor shaft 40. A fan 48 is attached by the nut 47 formed. The fan receiving plate 46 has a smaller diameter than the second bearing housing portion 35. The base plate 48 a of the fan 48 is sandwiched between the fan receiving plate 46 and the nut 47. The diameter of the fan 48 is smaller than that of the cover mounting portion 27.

  A fan cover 51 that covers the fan 48 is supported on the outer periphery of the cover mounting portion 27 and is sized to accommodate the fan 48 between the second support means 21.

  The electric blower 31 having the above-described configuration is supported in the cleaner body 2 through the first support means 11 and the second support means 21 as follows.

  Of the pair of bearing housing portions 34 and 35, the first bearing housing portion 34 that is far from the fan 48 is fitted with a vibration-proof rubber 52 that forms a cap-shaped support rubber that covers the outer periphery and the end surface. . By sandwiching the first bearing housing portion 34 between the sandwiching edge portion 12a of the upper support wall 12 and the sandwiching edge portion 13a of the lower support wall 13 with the vibration isolating rubber 52 interposed therebetween, the electric blower 31 The rear end portion is supported by the first support means 11 in a vibration-proof manner.

  Of the pair of bearing housing portions 34, 35, the second bearing housing portion 35 closer to the fan 48 is fitted inside the fitting portion 26 of the support member 25, whereby the second support means 21. It is supported by. Therefore, the second support means 21 is provided so as to partition the motor unit 32 and the fan 48.

  Thus, the electric motor part 32 is supported at both ends by the first support means 11 and the second support means 21 and is accommodated in the electric part chamber 2 e of the cleaner body 2. The wall portion 33b of the accommodated electric motor portion 32 and the portion 25a where the ventilation portion 28 of the support member 25 is formed are opposed to each other with a distance shorter than the protruding width of the second bearing housing portion 35, and the wall portion 33b. The ventilation inlet 43 and the ventilation portion 28 of the support member 25 face each other and communicate with each other.

  A sealing ring 54 (see FIG. 1) that also serves as a guide is provided between the wall 33b and the portion 25a. The sealing ring 54 is made of a flexible material such as rubber and has a diameter larger than that of the second bearing housing portion 35. The sealing ring 54 is bonded to the wall portion 33b and is fixed to the wall portion 33b and the portion 25a. The gap formed between them is closed. The inner diameter of the sealing ring 54 is such a size that the ventilation portion 28 and the ventilation inlet 43 are located inside. As a more preferred example, the inner peripheral surface 54 a of the sealing ring 54 has a tapered shape so as to smoothly guide the air that has passed through the ventilation portion 28 to the ventilation inlet 43. The sealing ring 54 may be bonded to the support member 25, and the inner peripheral surface 54a may be parallel to the outer peripheral surface of the sealing ring 54.

  A fan 48 attached to the rotor shaft 40 is accommodated in a fan chamber 2 f in the cleaner body 2. The outer periphery where the discharge port of the fan 48 is formed in this accommodated state faces the inner peripheral surface of the cover mounting portion 27 of the support member 25 and is surrounded by this inner peripheral surface. In addition, it is preferable that the discharge port of the fan 48 is opposed to the inner peripheral surface of the cover mounting portion 27 in that the flow of air from the discharge port to the ventilation portion 28 is less resistant and the flow is smooth. It can also be done as follows. That is, the front end position of the cover mounting portion 27 is moved closer to the motor portion 32 side than the base plate 48a of the fan 48, and the inner peripheral surface of a fan cover 51 to be described later that is supported by being fitted to the outer periphery of the cover mounting portion 27. And the discharge port of the fan 48 may be opposed to each other.

  A fan cover 51 that covers the fan 48 is fitted to the cover mounting portion 27. In order to ensure airtightness at the fitting portion, a ring-shaped seal 56 (see FIG. 1) is sandwiched between the outer periphery of the cover mounting portion 27 and the inner periphery of the fan cover 51. The seal 56 is made of rubber, and is fixed to either the outer periphery of the cover mounting portion 27 or the inner periphery of the fan cover 51. The seal 56 may be omitted, and the inner periphery of the fan cover 51 may be closely fitted to the outer periphery of the cover mounting portion 27.

  A ring-shaped seal member 58 (see FIG. 1) is attached to the inner surface of the central portion of the fan cover 51 and in the vicinity of the air inlet 51a provided in the fan cover 51. The seal member 58 is in contact with the edge of the suction port of the fan 48, so that air discharged from the outer periphery of the fan 48 is not sucked into the suction port. The air inlet 51 a of the fan cover 51 faces the partition 5.

  The outer periphery of the fan cover 51 is not in contact with the inner surface of the cleaner body 2, more specifically, the inner periphery of the electric blower chamber 2 b where the electric blower 31 is installed. Is provided with a gap G (see FIG. 1).

  The vacuum cleaner 1 is assembled in the following procedure.

  First, the support member 25 is attached to the electric motor part 32. In this attachment, the fitting portion 26 of the support member 25 is fitted to the outer periphery of the second bearing housing portion 35 of the electric motor case 33 to which the sealing ring 54 is previously bonded, and the portion 25a of the support member 25 is sealed. This is done by contacting the retaining ring 54. Thereby, the one end part of the rotor shaft 40 and the fan receiving plate 46 are arranged in the center part inside the cover attaching part 27.

  Next, the fan part is assembled. That is, as a first stage, the fan 48 is accommodated inside the cover mounting portion 27 and the fan 48 is fixed to one end portion of the rotor shaft 40 protruding into the cover mounting portion 27 by using the nut 47. . As a second stage, the fan cover 51 on which the seal member 58 has been previously mounted is fitted on the cover mounting portion 27. In this case, a seal 56 is sandwiched between the fan cover 51 and the cover mounting portion 27. Further, the seal member 58 contacts the edge of the suction port 51 a of the fan 48.

  Further, the vibration isolation ring 24 is fitted and attached to the outer periphery of the support member 25, and the vibration isolation rubber 52 is fitted on the first bearing housing portion 34. Thereby, the blower unit is assembled. As described above, the vibration isolation ring 24 may be attached to the support member 25 when the support member 25 is attached to the motor unit 32, or may be attached to the support member 25 in advance before that. Similarly, the anti-vibration rubber 52 may be attached to the first bearing housing portion 34 when the support member 25 is attached to the motor portion 32 as described above, or the first bearing housing portion may be previously provided before that. 34 may be attached.

  Thereafter, the blower unit is incorporated into the lower body case 4 from above. In this incorporation, the lower part of the vibration isolating ring 24 is fitted into a semicircular groove provided in the base part 23 of the lower body case 4 so that the front part of the blower unit is supported by the base part 23, and the vibration isolating ring is supported. The lower part of the first bearing housing part 34 to which the rubber 52 is attached is fitted into a semicircular groove-shaped sandwiching edge part 13 a provided in the lower support wall 13 of the lower main body case 4, and The rear end portion is supported by the lower support wall 13.

  Finally, the upper body case 3 is put on the lower body case 4. At this time, the holding edge portion 12a having a semicircular groove shape which the base portion 22 of the upper body case 3 has is fitted into the upper portion of the vibration isolation ring 24, and the front portion of the blower unit is connected to the base portion 22, 23 to support. At the same time, a semicircular groove provided on the upper support wall 12 of the upper main body case 3 is fitted to the upper portion of the first bearing housing portion 34 to which the anti-vibration rubber 52 is attached, and the rear end of the blower unit. The portion is sandwiched and supported by the upper and lower support walls 12 and 13. And in order to hold | maintain this state, the upper main body case 3 and the lower main body case 4 are screwed, and the cleaner main body 2 is assembled.

  The vacuum cleaner 1 having the above-described configuration is operated by energizing the electric blower 31. With the rotation of the fan 48 by this operation, the air and dust sucked into the cleaner body 2 are separated by the dust collector 6, and the dust is stored in the dust collector 6.

  At the same time, the air passing through the dust collector 6 flows from the vent hole 5a of the partition 5 into the fan chamber 2f of the electric blower chamber 2b and is sucked into the fan 48, and is then discharged from the outer periphery of the fan 48 and supported. After being guided to the back side of the fan 48 by the member 25, it flows out from the ventilation portion 28 and flows into the electric motor portion 32 through the ventilation inlet 43. Further, this air flows through the electric motor unit 32 to cool the stator 36, the rotor 39, the commutator 41, and the like, and then passes through the ventilation outlet 44 of the electric motor unit 32 to drive the electric motor in the electric blower chamber 2b. It flows out into the room 2e. Thereafter, the air flows into the exhaust chamber 2 c through the air circulation hole 7, and then is released to the outside of the cleaner body 2 through the exhaust hole 8.

  Since the electric blower 31 is air-cooled by such an exhaust flow, the input to the electric blower 31 increases as dust in the dust collector 6 accumulates, and the amount of heat generated by the stator 36 and the like increases. Moreover, the temperature rise of the electric blower 31 can be suppressed by the air cooling action.

  In the air cooling of the electric blower 31 as described above, the air discharged from the fan 48 is prevented from flowing back into the suction port of the fan 48 and sucked by the seal member 58, and the fan cover 51 and the support member 25 are attached to the cover. The seal 56 prevents air from leaking into the fan chamber 2 f from the space between the portion 27. Furthermore, the sealing ring 54 prevents air from leaking into the electric part chamber 2 e from the gap between the vent part 28 of the support member 25 and the vent inlet 43 of the electric motor part 32. In addition, air can be smoothly guided from the ventilation portion 28 to the ventilation inlet 43 by the inner peripheral surface 54 a of the sealing ring 54. Therefore, the entire amount of air discharged from the fan 48 can be smoothly guided into the motor case 33, and the stator 36 and the like can be air-cooled.

  During such operation, the electric blower 31 is attached to the first support means 11 based on the rotational unbalance of the rotating body including the rotor 39, the commutator 41, the fan 48, etc. With the first bearing housing portion 34 supported for vibration isolation as a fulcrum, the fan side tends to swing greatly.

  However, the electric blower 31 is supported by the second support means 21 disposed at a position closer to the first support means 11 than the fan 48. Specifically, the second bearing housing portion 35 of the motor case 33 having a diameter much smaller than the fan cover 51 is disposed between the fan-side wall portion 33 b of the motor case 33 and the fan 48. It is supported by the support means 21.

  As a result, the fan-side swing caused mainly by the rotation unbalance of the fan 48 is suppressed, and the driving sound can be reduced. Incidentally, the solid line in FIG. 3 showing the relationship between the operation sound and the frequency (number of revolutions) of the electric vacuum cleaner is the characteristic of the electric vacuum cleaner 1 according to the first embodiment, and the two-dot chain line is the electric vacuum cleaner according to the prior art. It is a characteristic of the machine. As is clear from these comparisons, it was confirmed that the peak value of the driving sound was lowered and the entire driving sound could be reduced. In addition, the frequency when the rotor 39 of the electric blower 31 is 30,000 revolutions per minute in a state where dust is not collected in the dust collector 6 is 500 Hz. The higher the value, the harsher.

  As described above, the fan-side swing of the electric blower 31 is reduced, but the support member 25 of the second support means 21 is vibrated along with the swing. However, since the vibration isolation ring 24 interposed between the support member 25 and the base portions 22 and 23 of the cleaner body 2 supporting the support member 25 is made of an elastic body such as rubber, the vibration of the support member 25 is It is damped by elastic deformation in the vibration isolating ring 24. Therefore, the vibration which spreads to the cleaner main body 2 via the base parts 22 and 23 can be suppressed.

  Further, a gap G is formed between the outer periphery of the fan cover 51 having a larger diameter than the fan 48 and the inner surface of the cleaner body 2, and the fan cover 51 and the inner surface of the cleaner body 2 are not in contact with each other. For this reason, the rotational vibration of the fan cover 51 is not transmitted to the cleaner body 2 even though the fan cover 51 rotates and vibrates together with the support member 25.

  As described above, since the electric vacuum cleaner 1 of the first embodiment can reduce the rotational vibration and noise of the electric blower 31, it is suitable for use in a quiet environment such as at night.

  FIG. 4 shows a second embodiment of the present invention. The second embodiment is the same as the first embodiment, including the configuration not shown, except that the sealing ring and the guide are separately provided as will be described below. Therefore, about the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, the sealing ring 54 is sandwiched between the wall portion 33b of the electric motor case 33 and the portion 25a of the support member 25, and the inner peripheral surface and the outer peripheral surface thereof are parallel to each other. The guide 61 protrudes integrally with the support member 25 made of, for example, synthetic resin inside the sealing ring. The guide 61 is provided obliquely from the ventilation portion 28 toward the ventilation inlet 43 so that the air that has passed through the ventilation portion 28 can be guided to the ventilation inlet 43. In this case, the guide 61 may be provided for each ventilation portion 28 or may be provided in an annular shape that gradually decreases in diameter as it approaches the wall portion 33b as shown in FIG. In the latter case, the sealing ring 54 can be omitted. In contrast to the example of FIG. 4, a guide 61 is integrally projected from the wall portion 33 b of the electric motor case 33, and the guide 61 is formed in a trumpet shape, that is, an annular ring whose diameter increases as it approaches the support member 25. The shape may be provided.

  Except for the matters described above, the second embodiment is the same as the first embodiment. Therefore, as with the vacuum cleaner 1 of the first embodiment, the second bearing housing portion 35 positioned closer to the fan 48 of the motor portion 32 is supported by the cleaner body 2 and the outer periphery of the fan cover 51 is Since the vacuum cleaner main body 2 is not supported, the rotational vibration of the electric blower 31 with the first bearing housing portion 34 positioned far from the fan 48 of the electric motor portion 32 as a fulcrum can be suppressed. Can drive with noise.

  5 and 6 show a third embodiment of the present invention. The third embodiment is the same as the first embodiment except for the matters described below, including a configuration not shown. Therefore, about the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  In the third embodiment, the second support means 21 includes upper and lower base portions 22 and 23, three or more elastic bodies such as a coil spring 63, and a fitting cylinder 64. The fitting cylinder 64 is provided by being fitted to the outer periphery of the second bearing housing portion 35 of the electric blower 31. Each coil spring 63 is a tension coil spring, one end of which is fixed to the fitting cylinder 64, and the other end is fixed to an arc-shaped groove of the base portions 22 and 23. With these coil springs 63, the fitting cylinder 64 is held at the center of the circular hole between the base portions 22 and 23 combined as shown in FIG. A space between the coil springs 63 adjacent to each other in the circumferential direction of the fitting cylinder 64 is used as the ventilation portion 28.

  In the third embodiment, the cover mounting portion 27 is formed by a pair of semicircular portions 27a and 27b. That is, the semicircular portion 27a is formed integrally with the upper base portion 22 and protrudes into the fan chamber 2f. Similarly, the semicircular portion 27b is formed integrally with the lower base portion 23. Projecting into the fan chamber 2f. These semicircular portions 27 a and 27 b are combined from above and below to form a circular cover attachment portion 27 as the upper main body case 3 and the lower main body case 4 are assembled. A fan cover 51 is fitted on the outer periphery of the cover mounting portion 27.

  The assembly procedure in the third embodiment is as follows. First, by assembling the upper main body case 3 and the lower main body case 4, the first bearing housing portion 34 of the electric motor portion 32 is sandwiched between the first support means 11 via the anti-vibration rubber 52. As a result, the electric motor part 32 is sandwiched between the upper and lower body cases 3 and 4 and the upper and lower base parts 22 and 23. In this state and before the partition 5 is mounted, after fitting the fitting cylinder 64 in which one end of the coil spring 63 is fixed in advance to the second bearing housing portion 35 of the motor portion 32, each coil spring 63 is extended. Then, the other ends are hooked on the upper and lower base portions 22 and 23 to assemble the second support means 21 and to support the second bearing housing portion 35 in a vibration-proof manner. Thereafter, the fan 48 is fixed to the rotor shaft 40 using the nut 47, and then the fan cover 51 covering the fan 48 is fitted on the cover mounting portion 27.

  Except for the matters described above, the second embodiment is the same as the first embodiment. Therefore, as with the vacuum cleaner 1 of the first embodiment, the second bearing housing portion 35 positioned closer to the fan 48 of the motor portion 32 is supported by the cleaner body 2 and the outer periphery of the fan cover 51 is Since the vacuum cleaner main body 2 is not supported, the rotational vibration of the electric blower 31 with the first bearing housing portion 34 positioned far from the fan 48 of the electric motor portion 32 as a fulcrum can be suppressed. Can drive with noise. In addition, since the coil spring 63 is used instead of rubber as the elastic body, it is preferable in terms of a high rotational vibration damping effect. In the third embodiment, it is preferable to form the fitting cylinder 64 with an eccentric weight in order to prevent resonance of each coil spring 63, and a damper is provided in the vicinity of each coil spring 63. Thus, resonance of each coil spring 63 can be further prevented.

  7 and 8 show a fourth embodiment of the present invention. The fourth embodiment is the same as the first embodiment except for the matters described below, including a configuration not shown. Therefore, about the same structure as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  In the fourth embodiment, the second support means 21 has upper and lower base portions 22 and 23 and a rubber elastic ring 65 as an elastic body. As shown in FIG. 8, the upper base portion 22 has a holding edge portion 67 supported by a plurality of arms 66. The elastic ring 65 for attenuating the swinging of the second bearing housing part 35 may be attached to the outer periphery of the second bearing housing part 35. The upper base portion 22, the arms 66, and the sandwiching edge portion 67 are integrally formed, and the sandwiching edge portion 67 has a semicircular shape. Similarly, the lower base portion 23 has a sandwiching edge portion 69 supported by a plurality of arms 68. The upper base 22, the arms 68, and the sandwiching edge 69 are integrally formed, and the sandwiching edge 69 has a semicircular shape. The gap between the adjacent arms 66 and the gap between the adjacent arms 68 are used as the ventilation portions 28, respectively. The sandwiching edge portions 67 and 69 form a cylindrical fitting portion 26 that vertically fits the second bearing housing portion 35.

  In the fourth embodiment, the cover mounting portion 27 is formed by a pair of semicircular portions 27a and 27b. That is, the semicircular portion 27a is formed integrally with the upper base portion 22 and protrudes into the fan chamber 2f. Similarly, the semicircular portion 27b is formed integrally with the lower base portion 23. Projecting into the fan chamber 2f. These semicircular portions 27 a and 27 b are combined from above and below to form a circular cover attachment portion 27 as the upper main body case 3 and the lower main body case 4 are assembled. A fan cover 51 is fitted on the outer periphery of the cover mounting portion 27.

  The assembly procedure in the fourth embodiment is as follows. First, the motor part 32 having the first bearing housing part 34 fitted with the anti-vibration rubber 52 and the second bearing housing part 35 fitted with the elastic ring 65 is connected to the upper body case 3 and the lower body case. 4 and the upper main body case 3 and the lower main body case 4 are assembled by screwing. As a result, the first bearing housing portion 34 of the electric motor portion 32 is supported by the first support means 11 via the anti-vibration rubber 52, and the second bearing housing portion 35 of the electric motor portion 32 has the elastic ring 65. And is supported by the second support means 21. In the latter case, the inner surfaces of the upper and lower clamping edges 67 and 69 combined in a fitting cylinder are in close contact with the outer periphery of the elastic ring 65, and the clamping edges 67 and 69 are connected via the elastic ring 65. The two bearing housing portions 35 are sandwiched from above and below. Next, in this state and before mounting the partition 5, the fan 48 is fixed to the rotor shaft 40 with the nut 47, and then the fan cover 51 covering the fan 48 is fitted on the cover mounting portion 27.

  Except for the matters described above, the second embodiment is the same as the first embodiment. Therefore, as with the vacuum cleaner 1 of the first embodiment, the second bearing housing portion 35 positioned closer to the fan 48 of the motor portion 32 is supported by the cleaner body 2 and the outer periphery of the fan cover 51 is Since the vacuum cleaner main body 2 is not supported, the rotational vibration of the electric blower 31 with the first bearing housing portion 34 positioned far from the fan 48 of the electric motor portion 32 as a fulcrum can be suppressed. Can drive with noise.

  DESCRIPTION OF SYMBOLS 1 ... Electric vacuum cleaner, 2 ... Vacuum cleaner main body, 2a ... Dust collector arrangement room, 2b ... Electric blower room, 6 ... Dust collector, 11 ... First support means, 12 ... Upper support wall, 13 ... Lower support Walls, 12a, 13a ... clamping edges, 21 ... second support means, 22, 23 ... base part, 24 ... vibration-proof ring (elastic body), 25 ... support member, 25a ... part of support member, 26 ... fitting Joint part, 27 ... Cover mounting part, 28 ... Ventilation part, 31 ... Electric blower, 32 ... Electric motor part, 33 ... Electric motor case, 33b ... Wall part, 34 ... First bearing housing part, 35 ... Second bearing housing , 37, 38 ... bearings, 39 ... rotor, 40 ... rotor shaft, 43 ... airflow inlet, 48 ... fan, 51 ... fan cover, 52 ... anti-vibration rubber, 54 ... sealing ring (guide), G ... Gap 61, guide 63, coil spring (elastic body), 64 fitting tube, 65 ... Elastic ring (elastic body), 67, 69 ... clamping edge

Claims (3)

The first and second bearing housing parts to which the bearings are attached and the motor part having a rotor rotatably supported by the pair of bearings, and the rotor formed to have a diameter larger than the maximum diameter of the rotor. An electric fan that cools the electric motor part with air sent from the fan, and a dust collector arrangement chamber through which air sucked into the electric fan flows A vacuum cleaner body including the electric blower in the downstream side of the dust collector arrangement chamber, and a vacuum cleaner comprising:
A first support means for supporting the first bearing housing part far from the fan in the both bearing housing parts on the cleaner body, and the motor part and the fan are provided to partition the motor. A second support means for supporting the second bearing housing portion closer to the fan among the two bearing housing portions to the cleaner body;
The second support means includes a cover mounting portion having a diameter larger than that of the fan and a ventilation portion through which air for cooling the electric motor portion passes. The second support means covers the fan in the cover mounting portion. A vacuum cleaner characterized in that a fan cover for housing the fan is supported between and an air gap is provided between an outer periphery of the fan cover and an inner surface of the vacuum cleaner body.   The second support means includes a base portion integrally formed on the inner surface of the cleaner body, and an elastic body disposed between the base portion and the second bearing housing portion. The electric vacuum cleaner according to claim 1, wherein   The motor portion has a vent inlet in a wall portion facing the second support means, the vent portion is provided in a portion of the second support means facing the wall portion, and the vent portion The vacuum cleaner according to claim 1 or 2, wherein a guide for guiding the air that has passed through to the ventilation inlet is provided between the wall portion and the portion.

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