JP5159378B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner in which an electric blower is elastically supported in an electric blower case.

  Generally, an electric vacuum cleaner is composed of a vacuum cleaner body in which an electric blower is housed, a dust collection hose communicated with the vacuum cleaner body, a hand control pipe communicated with the dust collection hose, and an extension pipe communicated with the hand control pipe. And a suction port communicated with the extension pipe. A suction opening facing the surface to be cleaned is formed in the suction port body.

  When the electric vacuum cleaner is operated, negative pressure is generated in the main body of the vacuum cleaner by the operation of the electric blower. This negative pressure acts on the suction port body through the dust collecting hose, the hand control pipe, and the extension pipe. If it does so, a vacuum cleaner will inhale the dust collected on the to-be-cleaned surfaces, such as a floor, with air from the suction opening of a suction mouth, and will clean the to-be-cleaned surface. The dust-containing air sucked into the suction port body is collected by separating dust by a high-speed separation type dust removing means or a filter built in the vacuum cleaner body.

  On the other hand, the clean air from which the dust has been separated is sucked into the electric blower, pressurized, and discharged from the exhaust port of the cleaner body.

  Here, since the electric blower has a finite number of moving blades and stationary blades, an unnecessary pressure pulsation is always caused in the air as the working fluid. This pressure pulsation is transmitted to the surroundings and becomes noise. In addition, fluid vibration such as surging and mechanical vibration due to unbalance of the rotating body are generated in the electric blower.

  As for the condition of the vibration-proof support portion for preventing the vibration of the electric blower, it is desirable to support a position having a small amplitude sufficiently softly. On the other hand, it is necessary to support the weight of the electric blower in the radial direction and the suction force generated by the operation of the electric blower in the axial direction.

  Therefore, Patent Document 1 discloses a spring member installed between the vicinity of the center of gravity of the electric blower and the cleaner body, and a rear elastic body for shock absorption provided with a gap between the motor and the cleaner body. And a vacuum cleaner that elastically supports the electric blower on the cleaner body using a shock absorbing front elastic body that is installed with a gap between the outer periphery of the fan part and the cleaner body.

  FIG. 9 is a partial cross-sectional view of a vacuum cleaner main body that houses an electric blower of a conventional vacuum cleaner.

  As shown in FIG. 9, the conventional electric vacuum cleaner 110 described in Patent Document 1 includes a vacuum cleaner body 2, an electric fan housing chamber 111 formed in the cleaner body 2, and an electric fan housing chamber 111. And the electric blower 10 elastically supported by the tensile elastic support 112.

  The tension elastic support 112 includes an outer peripheral ring 113 provided in the cleaner body 2, and an inner peripheral ring provided between the end surface 114 of the fan unit 14 formed near the center of gravity of the electric blower 10 and the mounting rib 115. 116 and a coil spring 117, which is a spring material with one end fixed to the outer ring 113 and the other end fixed to the inner ring 116, and a tensile force is urged. The axial direction and the radial direction of the electric blower 10 are elastically supported by the tensile elastic support body 112.

  The fan part 14 of the electric blower 10 is attached with a rubber-like, substantially cylindrical front elastic body 118 for shock absorption. On the inner wall of the cleaner body 2, a fixed annular front rib 119 and an end rib 120 projecting in the axial direction of the electric blower 10 are formed. The front rib 119 and the end rib 120 are separated from the front elastic body 118 by a gap 121.

  A rubber-like, cylindrical impact-absorbing rear elastic body 125 is attached to the bearing housing portion 60 of the motor portion 15 of the electric blower 10. A rear rib 126 protrudes from the inner wall of the cleaner body 2 around the rear elastic body 125. The rear rib 126 and the rear elastic body 125 are separated by a gap 127.

  A disc-shaped seal 130 having a hole communicating with the air inlet 17 of the electric blower 10 is provided on the partition plate 129 between the dust collecting portion 128 and the electric blower housing chamber 111 formed in the cleaner body 2. . A cylindrical flange 131 is formed at the edge of the hole formed in the seal 130 and is in contact with the peripheral edge of the air inlet 17 of the electric blower 10.

  FIG. 10 is a diagram illustrating characteristics in the axial direction of an electric blower of an elastic support that elastically supports an electric blower of a conventional vacuum cleaner.

As shown in FIG. 10, the electric blower 10 elastically supported by the coil spring 117 of the tensile elastic support 112 has a non-linear characteristic in the relationship between the force applied in the axial direction and the displacement. That is, the minute vibration applied in the axial direction of the electric blower 10 is flexibly supported by the coil spring 117, and a large force due to a static force generated by the suction force of the electric blower 10 or a drop impact on the cleaner body 2. Strong support for power.
Japanese Patent Laid-Open No. 5-84194

  The electric blower of the conventional vacuum cleaner described in Patent Document 1 is elastically supported in the vacuum cleaner main body by a coil spring biased by a tensile force, and the force acting in the radial direction is flexibly supported. The force acting in the direction is strongly supported as the axial displacement increases. Therefore, it is possible to prevent vibration generated by the operation of the electric blower from being transmitted to the cleaner body.

  Here, from the viewpoint of vibration isolation, it is preferable that the spring constant of the coil spring constituting the vibration isolation support portion is small.

  However, in the electric blower of the conventional vacuum cleaner described in Patent Document 1, it is necessary to extend the coil spring sufficiently more than the free length in order to bias the coil spring with a tensile force. Therefore, it is necessary to sufficiently separate the space between the wall surface of the electric blower housing chamber and the electric blower, and the vacuum cleaner cannot be reduced in size.

  On the other hand, air is discharged into the electric fan housing chamber by the operation of the electric fan. If an obstacle such as a coil spring is present in the flow of exhaust from the electric blower, a change in air pressure occurs around the obstacle, resulting in noise. Further, when vibration is excited in the coil spring due to the change in air pressure, the electric vacuum cleaner may be vibrated by the coil spring serving as the vibration isolating support portion.

  Here, for example, the electric blower may be housed in an electric blower case, and the electric blower case may be housed in the main body of the vacuum cleaner to prevent noise and vibration due to the operation of the electric blower. However, it has the same problem as the electric blower housing chamber.

  The present invention provides an electric vacuum cleaner that elastically supports an electric blower accommodated in a main body of a vacuum cleaner, can suppress noise and vibration due to the operation of the electric blower, and can downsize a space in which the electric blower is accommodated. suggest.

In order to solve the above problems, in the present invention, a vacuum cleaner main body, an electric blower case accommodated in the vacuum cleaner main body, a motor portion accommodated in the electric blower case, and a fan portion and an exhaust port are formed. comprising an electric blower having bets, and a plurality of coil springs to the electric blower elastic support before Symbol electric blower case, the coil spring is provided by spaced apart in a circumferential direction of the electric blower case, the diameter of the electric blower The electric blower case is biased by a compressive force in the direction, and the electric blower case has one case member that restrains radial displacement of the coil spring , and a discharge port that discharges air exhausted from the exhaust port from the electric blower case there is composed of a formed other case member, the coil spring is a space between the electric blower and the electric blower case, the exhaust Wherein the mainstream flow line of the exhaust gas flowing out of the electric blower case from the mouth through the discharge port is disposed in the second space side other than the first space encompassed.

Moreover, in this invention, the electric blower which has a vacuum cleaner main body, the electric blower case accommodated in the said vacuum cleaner main body, and the motor part in which the fan part and the exhaust port were formed while being accommodated in the said electric blower case. When, a plurality of coil springs to pre Symbol electric blower elastically supporting the electric blower case, the coil spring is provided by spaced apart in a circumferential direction of the electric blower case, the compressive force in the radial direction of the electric blower is energized, said longitudinally of the electric blower provided the coil spring is moved away from one another of the plurality of rows, the electric blower case is to restrain the displacement in the radial direction of the coil spring, and the coil spring adjacent to each other One case member in which a discharge port for discharging air exhausted from the exhaust port from the inside of the electric blower case is formed between the rows and the other case. Is composed of a member, said coil spring, said a space between the electric blower and the electric blower case, the main flow line of the exhaust gas flowing out of the electric blower case via the discharge port from the exhaust port It is arranged on the second space side other than the included first space .

  According to the present invention, the electric blower housed in the vacuum cleaner body is elastically supported, the noise and vibration caused by the operation of the electric blower can be soundproofed and vibration-proof, and the space in which the electric blower is housed can be reduced in size. A machine can be proposed.

  Hereinafter, embodiments of a vacuum cleaner according to the present invention will be described with reference to the drawings.

[First Embodiment]
1st Embodiment of the vacuum cleaner which concerns on this invention is described with reference to FIGS.

  FIG. 1 is an external view of the electric vacuum cleaner according to the first embodiment of the present invention.

  As shown in FIG. 1, a vacuum cleaner 1 according to this embodiment includes a vacuum cleaner main body 2, a dust collection hose 3 having one end connected to a connecting port 2 a provided in the vacuum cleaner main body 2, and a detachable white background. The hand operation tube 4 having one end provided at the other end of the dust collecting hose 3, the extension tube 5 having one end detachably connected to the other end of the hand operation tube 4, and the other end of the extension tube 5 are detachable And a suction port body 6 connected to.

  The hand operating tube 4 is provided with an operation unit 4a. The operation unit 4a includes a turn-off switch 4b for stopping the operation of the electric vacuum cleaner 1, an activation switch 4c for starting the operation of the electric vacuum cleaner 1, and the like.

  A suction opening (not shown) facing the surface to be cleaned is formed on the lower surface of the suction port body 6. The suction opening communicates with a suction chamber (not shown) formed in the suction port body 6. This suction opening is communicated with the inside of the cleaner body 2 from the connection port 2a through the extension pipe 5, the hand operation pipe 4, and the dust collecting hose 3.

  The vacuum cleaner main body 2 accommodates a dust separation dust collection unit (not shown) communicated with the connection port 2a and an electric blower 10 that applies a negative pressure to the suction port body 6 through the dust separation dust collection unit. The The vacuum cleaner body 2 is formed with a main body exhaust port (not shown) through which the exhaust from the electric blower 10 is discharged.

  When the electric vacuum cleaner 1 is operated, a negative pressure acts in the cleaner main body 2 by the operation of the electric blower 10. The negative pressure acts on the suction port body 6 through the dust collection hose 3, the hand operation tube 4, and the extension tube 5 from the connection port 2 a. If it does so, the vacuum cleaner 1 will inhale the dust which collected on the to-be-cleaned surfaces, such as a floor, with air from the suction opening of the suction inlet body 6, and will clean a to-be-cleaned surface. The dust-containing air sucked into the suction port body 6 is separated and collected by the dust separation / collection unit housed in the cleaner body 2.

  On the other hand, clean air from which dust has been separated is sucked into the electric blower 10 to be pressurized and discharged from the main body exhaust port of the cleaner body 2.

  FIG. 2 is a perspective view of the electric blower case that houses the electric blower of the electric vacuum cleaner according to the first embodiment of the present invention, partially cut away.

  As shown in FIG. 2, the electric blower 10 of the electric vacuum cleaner 1 is compression-elastically supported by an elastic support body 13 in an electric blower case 12 accommodated in the cleaner main body 2.

  The electric blower 10 includes a fan unit 14 that houses a centrifugal fan (not shown) that generates negative pressure, and a motor unit 15 that houses a motor (not shown) that drives the centrifugal fan.

  The fan unit 14 is covered with a bottomed cylindrical fan cover 18 having an intake port 17. The air inlet 17 is disposed substantially at the center of the bottom plate portion 19 of the fan cover 18 and is formed so as to face a suction port (not shown) of a centrifugal fan housed in the fan cover 18. The air inlet 17 is provided with a rectifying member 21 having a hole communicating with the fan portion 14.

  For ease of explanation, the following description will be given with the posture shown in FIG. 2 as the basic posture, with the solid arrow X being forward, the solid arrow Y being left, and the solid arrow Z being upward. .

  The electric blower case 12 is made of a resin such as ABS, and includes a bottomed cylindrical intake side case member 22 and a bottomed cylindrical exhaust side case member 23.

  The intake port side wall portion 24 corresponding to the bottom plate portion of the intake side case member 22 has a seal member mounting hole 25. The seal member mounting hole 25 is fitted with a seal member 27 having a hole for allowing the cleaner body 2 and the air inlet 17 of the electric blower 10 to communicate with each other.

  Fitting grooves 30 and 31 are formed and fitted in the opening side end portion 28 of the intake side case member 22 and the opening side end portion 29 of the exhaust side case member 23, respectively, and the opening side of the intake side case member 22 is fitted. An exhaust side case coupling portion 33 formed on the opening side end portion 29 of the exhaust side case member 23 is screwed to the intake side case coupling portion 32 formed on the end portion 28, so that the intake side case member 22 and the exhaust side case are connected. The member 23 is integrally coupled.

  An elastic support fitting recess 39 having an annular step surface 38 is formed on the inner wall 34 of the intake case member 22 so as to face the fitting groove 31 of the exhaust case member 23. The elastic support 13 is fitted in the elastic support fitting recess 39 and is sandwiched between the step surface 38 of the intake side case member 22 and the fitting groove 31 of the exhaust side case member 23.

  Therefore, the radial displacement of the elastic support 13 is constrained by the elastic support fitting recess 39 formed on the peripheral surface 40 of the intake side case member 22, and the stepped surface 38 of the intake side case member 22 and the exhaust side case member 23. The axial displacement of the elastic support 13 is constrained by the fitting groove 31.

  The seal member 27 is an axial vibration isolating support portion that elastically supports the axial displacement of the electric blower 10 to insulate vibration. That is, the seal member 27 supports the axial displacement of the electric blower 10 against the suction force generated by the operation of the electric blower 10, and prevents vibrations in the axial direction caused by the operation of the electric blower 10. The seal member 27 includes a first truncated conical hollow body portion 42 having a large-diameter opening 41 on the upstream side of the electric blower 10, a cylindrical portion 43 in which the rectifying member 21 is fitted, and an intake side case member 22. It is comprised from the fitting part 44 inserted by the sealing member attachment hole 25, and the 2nd truncated cone hollow body part 46 which has the large diameter opening part 45 contact | abutted to the fan cover of the electric blower 10. FIG.

  The large-diameter opening 41 of the first truncated conical hollow body 42 is brought into contact with the peripheral edge of the communication passage (not shown) of the cleaner body 2 communicated with the dust separating and collecting unit.

  An annular ring body 48 having a hole communicating with the air inlet 17 of the electric blower 10 is formed in the small diameter portion 47 of the first truncated conical hollow body portion 42. Further, a substantially cylindrical cylindrical body portion 43 extends toward the inside of the electric blower case 12 along the edge of the small diameter portion 47 of the first truncated conical hollow body portion 42.

  A fitting portion 44 extends from the side wall portion 49 of the first truncated conical hollow body portion 42. In the fitting portion 44, a circumferential fitting groove portion 50 fitted in the seal member mounting hole 25 of the inlet side wall portion 24 and the periphery of the seal member mounting hole 25 are extended toward the inside of the electric blower case 12. An axial fitting groove 52 fitted into the seal member mounting rib 51 is formed. A small diameter portion 53 of the second truncated conical hollow body portion 46 is continuously formed in the fitting portion 44.

  That is, the seal member 27 constitutes a case portion suction port 54 through which the communication passage of the cleaner body 2 and the intake port 17 of the electric blower 10 communicate with each other, and the communication passage of the cleaner body 2 and the intake air of the electric blower 10. The contact portions with the mouth 17 are sealed.

  FIG. 3 is a perspective view of the electric blower case that houses the electric blower of the electric vacuum cleaner according to the first embodiment of the present invention, partially cut away.

  As shown in FIG. 3, the motor unit 15 of the electric blower 10 is covered with a bottomed cylindrical motor cover 57 having an exhaust port 55. The exhaust port 55 is disposed at the rear end portion of the peripheral surface 58 of the motor cover 57, that is, the rear end portion of the electric blower 10. A bearing housing portion 60 that accommodates a bearing (not shown) that rotatably supports a rotor (not shown) of the motor is formed in the center of the bottom plate portion 59 of the motor cover 57. The center of gravity of the electric blower 10 is located on the front end side of the motor cover 57.

  A bearing housing insertion convex portion 63 projects from the exhaust port side wall portion 62 corresponding to the bottom plate portion of the exhaust side case member 23. A bearing housing portion 60 of the motor portion 15 of the electric blower 10 is inserted into the bearing housing insertion convex portion 63 while being separated. The bearing housing insertion convex portion 63 is covered with an elastic shock absorbing member 64. The shock absorbing member 64 is an impact generated between the inner wall (not shown) of the cleaner main body 2 and the electric blower case 12 when an excessive impact force due to the dropping of the cleaner main body 2 acts on the electric blower case 12. Buffer power.

  The elastic support 13 is a vibration-proof support that insulates vibration generated by the electric blower 10, and is provided near the outer ring 65 provided on the inner wall 34 of the electric blower case 12 and the center of gravity of the electric blower 10. And an inner ring 66, and a coil spring 67, which is an elastic support member having one end fixed to the outer ring 65 and the other end fixed to the inner ring 66 and urged by a compressive force. The axial direction and the radial direction of the electric blower 10 are elastically supported in the electric blower case 12 by the elastic support 13.

  The outer peripheral ring 65 is an annular body having a substantially L-shaped cross section formed using a resin such as ABS. The outer ring 65 includes a ring portion 69 provided around the inner circumference of the elastic support fitting recess 39 of the intake side case member 22 and a reinforcing rib portion protruding radially inward from the end of the ring portion 69. 70. On the inner peripheral surface of the ring portion 69, a convex portion 71 projects from the radially inner side. The reinforcing rib portion 70 is disposed at the end of the ring portion 69 that is in contact with the stepped surface 38 of the intake side case member 22.

  The inner ring 66 is a belt-like body formed using a resin such as ABS. The ring unit 73 is provided around the outer periphery of the motor unit 15 of the electric blower 10. On the outer peripheral surface of the ring portion 73, a convex portion 74 is provided so as to project outward in the radial direction.

  The ring part 73 is formed with a split part 75 when the inner peripheral ring 66 is fitted into the outer periphery of the motor part 15, and the split part 75 is formed with a flange part 76 for fastening the ring part 73. The ring portion 73 is formed with a locking recess 78 that is locked by the brush mechanism 77 of the electric blower 10 to restrain the circumferential displacement of the inner peripheral ring 66.

  The convex portion 71 provided on the outer peripheral ring 65 and the convex portion 74 provided on the inner peripheral ring 66 are opposed to each other while being separated from each other.

  A compression force is applied to the coil spring 67, and one end thereof is fitted into the convex portion 71 of the outer peripheral ring 65, and the other end is fitted into the convex portion 74 of the inner peripheral ring 66. It is built between. The required number of coil springs 67 is two or more, preferably three or more. In this embodiment, for example, three coil springs 67 are spaced apart at substantially equal intervals in the circumferential direction of the electric blower case 12 and are provided radially. It is done. The central axes of the coil springs 67 are arranged so as to intersect near the center of gravity of the electric blower 10.

  In other words, the electric blower 10 is elastically supported in the electric blower case 12 via the inner ring 66 and the outer ring 65 by the coil spring 67 urged in the radial direction of the electric blower 10. Instead of the coil spring 67, the elastic support 13 is configured by using another type of spring or elastic body such as a plate spring or a torsion bar that can bias a compressive force between the outer ring 65 and the inner ring 66. May be.

  The elastic support 13 elastically supports the electric blower 10 by applying a tensile force to the coil spring having the same wire diameter, outer diameter, and number of turns to elastically support the electric blower 10 by applying a compressive force to the coil spring 67. Compared with the case where it does, the separation distance of the outer periphery ring 65 and the inner periphery ring 66 can be comprised narrowly. That is, since the distance between the electric blower 10 and the electric blower case 12 is made as narrow as possible and the outer diameter of the electric blower case 12 can be reduced, the electric blower case 12 can be reduced in size and weight.

  A case portion discharge port 79 is formed in the electric blower case 12. The air exhausted from the exhaust port 55 of the electric blower 10 into the electric blower case 12 is exhausted out of the electric blower case 12 through the case portion discharge port 79.

  The case portion discharge port 79 includes an exhaust side case recess 82 formed in the peripheral surface 80 of the exhaust side case member 23 and an opening side end portion 28 of the intake side case member 22. That is, the case portion discharge port 79 is formed in the exhaust side case member 23.

  The opening width in the longitudinal axis direction of the case portion discharge port 79 is formed from the opening side end portion 29 of the exhaust side case member 23 to the edge portion of the exhaust port side wall portion 62.

  That is, the electric blower case 12 includes an intake side case member 22 having an elastic support body fitting concave portion 39 in which a radial displacement of the elastic support body 13 is restricted, and an exhaust side case member 23 having a case portion discharge port 79. Composed.

  Therefore, in the electric blower case 12, after the elastic support 13 is fitted in the elastic support fitting recess 39 of the intake side case member 22, the exhaust side case member 23 is coupled to the intake side case member 22 and integrated. Therefore, the assembling property is good, and the exhaust side case member 23 can be made less rigid than the intake side case member 22. Then, the weight of the entire electric blower case 12 can be reduced.

  FIG. 4 is a rear view in which the electric blower of the electric vacuum cleaner and the exhaust side case member of the electric blower case according to the first embodiment of the present invention are partially cut away.

  As shown in FIG. 4, a plurality of exhaust ports 55 are formed radially on the peripheral surface 58 of the motor cover 57 of the electric blower 10. Specifically, the exhaust ports 55 are formed at equal intervals respectively in the upper right, lower right, upper left, and lower left sides of the electric blower case 12.

  The circumferential opening width of the case portion discharge port 79 of the electric blower case 12 is sandwiched between a pair of adjacent coil springs 67 among the plurality of coil springs 67 installed between the outer ring 65 and the inner ring 66. Centered about the approximate center of the arc, the coil springs 67 are spaced apart from each other approximately equally and set as required. That is, the opening area composed of the respective opening widths in the longitudinal axis direction and the circumferential direction of the case portion discharge port 79 is set as required according to the output of the electric blower 10.

  In the electric blower case 12 according to the present embodiment, for example, three coil springs 67 included in the elastic support 13 are provided at substantially equal intervals in the circumferential direction. When the coil springs 67a installed along the vertical direction are used as a reference, each of the coil springs 67 is installed spaced apart approximately every 120 degrees, and is an electric blower that is approximately the center of the arc formed by the two coil springs 67b positioned below. A case portion discharge port 79 is formed on the lower side of the side wall portion 83 of the case 12.

  FIG. 5 is a cross-sectional view of an electric blower case that houses the electric blower of the electric vacuum cleaner according to the first embodiment of the present invention.

  As shown in FIG. 5, the space between the outer surface of the electric blower 10 and the inner surface of the electric blower case 12 is exhaust air that flows out of the electric blower case 12 from the exhaust port 55 of the electric blower 10 through the case discharge port 79. It is divided into a space S in which main streamlines are included and a space So in which main exhaust streamlines are not included.

  The coil spring 67 of the elastic support 13 is always disposed on the space So side where the main stream streamlines of exhaust are not included. That is, the coil spring 67 is disposed outside the main flow of the exhaust gas that is exhausted from the exhaust port 55 of the electric blower 10 and flows into the electric blower case 12 and flows out of the electric blower case 12 from the case part discharge port 79.

  In the vacuum cleaner 1 according to the present embodiment, the air sucked from the intake port 17 by the operation of the electric blower 10 flows inside the electric blower 10, cools the motor unit 15, and cools the motor unit 15 from the exhaust port 55. The pressure in the electric blower case 12 is increased. The downstream side of the case portion discharge port 79 of the electric blower case 12 is opened to the atmosphere through a main body exhaust port formed in the cleaner body 2. Therefore, the main flow of the exhaust of the electric blower 10 that has flowed into the electric blower case 12 is surrounded by the inner surface of the electric blower case 12 and the outer surface of the electric blower 10 and includes the exhaust port 55 and the case portion discharge port 79. Formed. In particular, since the electric blower case 12 is formed in a cylindrical shape, the exhaust flows along the inner wall of the electric blower case 12 in the space S and is discharged from the case discharge port 79 (Coanda effect). On the other hand, the exhaust of the electric blower 10 hardly flows into the space So except for the space S in the electric blower case 12.

  That is, compared with the main flow of the exhaust air of the electric blower 10 that flows through the space S in the electric blower case 12, the flow of air having a high flow velocity does not occur around the coil spring 67 of the elastic support 13 included in the space So. .

  Therefore, according to the vacuum cleaner 1 which concerns on this embodiment, generation | occurrence | production of the noise resulting from the pressure change of the air around the coil spring 67 can be suppressed efficiently. Further, the vibration of the coil spring 67 is not excited by the pressure change of the air.

  Moreover, according to the vacuum cleaner 1 which concerns on this embodiment, the improvement of the assembly property of the electric blower case 12 and the weight reduction by low rigidity can be achieved.

  Therefore, according to the vacuum cleaner 1 which concerns on this embodiment, the electric blower 10 accommodated in the vacuum cleaner main body 2 can be elastically supported, and the noise and vibration by the action | operation of the electric blower 10 can be sound-proofed and vibration-proof, and it is electric. The space in which the blower 10 is accommodated can be reduced in size.

[Second Embodiment]
A second embodiment of the vacuum cleaner according to the present invention will be described with reference to FIG.

  In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 6 is a cross-sectional view of an electric blower case that houses an electric blower of a vacuum cleaner according to a second embodiment of the present invention.

  As shown in FIG. 6, the electric blower case 12 </ b> A of the vacuum cleaner 1 </ b> A according to the present embodiment has a case portion discharge on the exhaust outlet side wall portion 62 corresponding to the bottom plate portion of the exhaust side case member 23 formed in a substantially bottomed cylindrical shape. It has an outlet 79A. That is, the case portion discharge port 79 </ b> A is formed in the exhaust side case member 23. The case portion discharge ports 79A are provided, for example, at four locations, and are opened at substantially equal intervals in the circumferential direction of the disc-shaped exhaust port side wall portion 62. The opening area of the case portion discharge port 79 </ b> A is set as required according to the output of the electric blower 10.

  In the vacuum cleaner 1 </ b> A according to this embodiment, the air sucked from the intake port 17 by the operation of the electric blower 10 flows inside the electric blower 10, cools the motor unit 15, and cools the motor unit 15 from the exhaust port 55. It flows out in 12A and raises the pressure in electric fan case 12A. The downstream side of the case part discharge port 79A of the electric blower case 12A is opened to the atmosphere through a main body exhaust port formed in the cleaner body 2. Therefore, the main flow of the exhaust of the electric blower 10 flowing out into the electric blower case 12A is surrounded by the inner surface of the electric blower case 12A and the outer surface of the electric blower 10, and includes the space S including the exhaust port 55 and the case portion discharge port 79A. Formed. On the other hand, the exhaust of the electric blower 10 hardly flows into the space So except for the space S in the electric blower case 12A.

  That is, compared with the main flow of the exhaust wind of the electric blower 10 that flows through the space S in the electric blower case 12A, the flow of air having a high flow velocity does not occur around the coil spring 67 of the elastic support 13 included in the space So. .

  Therefore, according to the vacuum cleaner 1A according to the present embodiment, it is possible to efficiently suppress the generation of noise due to the pressure change of the air around the coil spring 67. Further, the vibration of the coil spring 67 is not excited by the pressure change of the air.

  Moreover, according to the vacuum cleaner 1A which concerns on this embodiment, the improvement of the assembly property of the electric blower case 12A and the weight reduction by low rigidity can be achieved.

  Therefore, according to the electric vacuum cleaner 1A according to the present embodiment, the electric blower 10 accommodated in the cleaner main body 2 is elastically supported, noise and vibration due to the operation of the electric blower 10 can be soundproofed and vibration-proof, and electric The space in which the blower 10 is accommodated can be reduced in size.

[Third Embodiment]
A third embodiment of the vacuum cleaner according to the present invention will be described with reference to FIG.

  In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 7 is a cross-sectional view of an electric blower case that houses an electric blower of a vacuum cleaner according to a third embodiment of the present invention.

  As shown in FIG. 7, the electric blower case 12B of the vacuum cleaner 1B according to the present embodiment has a case portion discharge on the exhaust outlet side wall portion 62 that corresponds to the bottom plate portion of the exhaust side case member 23 formed in a substantially bottomed cylindrical shape. It has an outlet 79B. That is, the case portion discharge port 79 </ b> B is formed in the exhaust side case member 23. The case portion discharge port 79 </ b> B is opened on substantially the entire surface of the disc-shaped exhaust port side wall portion 62.

  In the vacuum cleaner 1 </ b> B according to the present embodiment, the air sucked from the intake port 17 by the operation of the electric blower 10 flows inside the electric blower 10, cools the motor unit 15, and cools the motor unit 15 from the exhaust port 55. It flows out into 12B and raises the pressure in the electric blower case 12B. The downstream side of the case portion outlet 79 </ b> B of the electric blower case 12 </ b> B is opened to the atmosphere through a main body exhaust port formed in the cleaner body 2. Therefore, the main flow of the exhaust of the electric blower 10 that has flowed into the electric blower case 12B is surrounded by the inner surface of the electric blower case 12B and the outer surface of the electric blower 10, and includes the exhaust port 55 and the case portion discharge port 79B. Formed. On the other hand, the exhaust of the electric blower 10 hardly flows into the space So except for the space S in the electric blower case 12B.

  That is, compared with the main flow of the exhaust wind of the electric blower 10 flowing through the space S in the electric blower case 12B, the air flow having a high flow velocity does not occur around the coil spring 67 of the elastic support 13 included in the space So. .

  Therefore, according to the vacuum cleaner 1 </ b> B according to the present embodiment, it is possible to efficiently suppress the generation of noise due to the pressure change of the air around the coil spring 67. Further, the vibration of the coil spring 67 is not excited by the pressure change of the air.

  Moreover, according to the vacuum cleaner 1B which concerns on this embodiment, the improvement of the assembly property of the electric blower case 12B and the weight reduction by low rigidity can be achieved.

  Therefore, according to the electric vacuum cleaner 1B according to the present embodiment, the electric blower 10 accommodated in the cleaner main body 2 is elastically supported, noise and vibration due to the operation of the electric blower 10 can be soundproofed and vibration-proof, and electric The space in which the blower 10 is accommodated can be reduced in size.

[Fourth Embodiment]
A fourth embodiment of the vacuum cleaner according to the present invention will be described with reference to FIG.

  In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 8 is a cross-sectional view of an electric blower case that houses an electric blower of a vacuum cleaner according to a fourth embodiment of the present invention.

  As shown in FIG. 8, the electric blower case 12 </ b> C of the electric vacuum cleaner 1 </ b> C according to this embodiment includes a plurality of rows of elastic supports 13 that elastically support the electric blower 10. Specifically, the electric blower case 12 </ b> C is provided with two sets of elastic supports 13 that elastically support the front end and the rear end of the motor unit 15 of the electric blower 10, respectively.

  An elastic support fitting recess 39 having an annular step surface 38 is formed on the inner wall 34 of the intake case member 22 so as to face the fitting groove 31 of the exhaust case member 23. The respective elastic supports 13 are separated by a cylindrical spacer 86 and are fitted into the elastic support fitting recesses 39, and between the step surface 38 of the intake side case member 22 and the fitting groove 31 of the exhaust side case member 23. Sandwiched between.

  Therefore, the radial displacement of the elastic support 13 is constrained by the elastic support fitting recess 39 formed on the peripheral surface 40 of the intake side case member 22, and the stepped surface 38 of the intake side case member 22 and the exhaust side case member 23. The axial displacement of the elastic support 13 is constrained by the fitting groove 31 and the cylindrical spacer 86.

  The exhaust port 55 of the electric blower 10 is opened radially at the center of the peripheral surface 58 of the motor unit 15 in the longitudinal axis direction.

  The case outlet 79C is provided between the elastic supports 13 adjacent to each other, and is formed in the cylindrical spacer opening 87 formed in the cylindrical spacer 86 and the elastic support fitting recess 39 of the intake side case member 22. And an intake side case opening 88. The case portion discharge ports 79C are provided, for example, at four locations, and are opened at substantially equal intervals in the circumferential direction while corresponding to the exhaust ports 55 of the electric blower 10. That is, it is formed so that the air exhausted from the exhaust port 55 of the electric blower 10 does not cross the elastic support 13 until it reaches the case part discharge port 79C. The opening area of the case portion discharge port 79 </ b> C is set as required according to the output of the electric blower 10.

  In the electric blower case 12 </ b> C, after the elastic support 13, the cylindrical spacer 86, and the elastic support 13 are sequentially fitted in the elastic support fitting recess 39 of the intake side case member 22, the exhaust side case member 23 is moved to the intake side. Since the case member 22 can be combined and integrated, the assemblability is good, and the exhaust side case member 23 can be made less rigid than the intake side case member 22. Then, the weight of the entire electric blower case 12 can be reduced.

  In the vacuum cleaner 1 </ b> C according to the present embodiment, the air sucked from the intake port 17 by the operation of the electric blower 10 flows inside the electric blower 10, cools the motor unit 15, and cools the motor unit 15 from the exhaust port 55. It flows out in 12C and raises the pressure in electric fan case 12C. A downstream side of the case portion discharge port 79 </ b> C of the electric blower case 12 </ b> C is opened to the atmosphere through a main body exhaust port formed in the cleaner body 2. Therefore, the main flow of the exhaust of the electric blower 10 flowing out into the electric blower case 12C is surrounded by the inner surface of the electric blower case 12C and the outer surface of the electric blower 10, and includes the space S including the exhaust port 55 and the case portion discharge port 79C. Formed. In particular, since the electric blower case 12C is formed in a cylindrical shape, the exhaust flows along the inner wall of the electric blower case 12C in the space S and is discharged from the case portion discharge port 79C (Coanda effect). On the other hand, the exhaust of the electric blower 10 hardly flows into the space So except for the space S in the electric blower case 12C.

  That is, compared with the main flow of the exhaust wind of the electric blower 10 flowing through the space S in the electric blower case 12C, the air flow having a high flow velocity does not occur around the coil spring 67 of the elastic support 13 included in the space So. .

  Therefore, according to the vacuum cleaner 1 </ b> C according to the present embodiment, it is possible to efficiently suppress the generation of noise due to the pressure change of the air around the coil spring 67. Further, the vibration of the coil spring 67 is not excited by the pressure change of the air.

  Moreover, according to the vacuum cleaner 1C which concerns on this embodiment, the weight reduction by the improvement of the assembly property of the electric blower case 12C and low rigidity can be achieved.

  Therefore, according to the electric vacuum cleaner 1C according to the present embodiment, the electric blower 10 accommodated in the cleaner main body 2 is elastically supported, noise and vibration due to the operation of the electric blower 10 can be soundproofed and vibration-proof, and electric The space in which the blower 10 is accommodated can be reduced in size.

The figure which showed the external appearance of the vacuum cleaner which concerns on 1st Embodiment of this invention. The perspective view which notched and showed the electric blower case which accommodates the electric blower of the vacuum cleaner which concerns on 1st Embodiment of this invention. The perspective view which notched and showed the electric blower case which accommodates the electric blower of the vacuum cleaner which concerns on 1st Embodiment of this invention. The rear view which notched and showed the exhaust side case member of the electric blower of the electric vacuum cleaner which concerns on 1st Embodiment of this invention, and an electric blower case. Sectional drawing of the electric blower case which accommodates the electric blower of the vacuum cleaner which concerns on 1st Embodiment of this invention. Sectional drawing of the electric blower case which accommodates the electric blower of the vacuum cleaner which concerns on 2nd Embodiment of this invention. Sectional drawing of the electric blower case which accommodates the electric blower of the vacuum cleaner which concerns on 3rd Embodiment of this invention. Sectional drawing of the electric blower case which accommodates the electric blower of the vacuum cleaner which concerns on 4th Embodiment of this invention. The fragmentary sectional view of the vacuum cleaner main body which accommodates the electric blower of the conventional vacuum cleaner. The figure which shows the characteristic of the axial direction of the electric blower of the elastic support body which elastically supports the electric blower of the conventional vacuum cleaner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C Vacuum cleaner 2 Vacuum cleaner main body 2a Connection port 3 Dust collection hose 4 Hand control tube 5 Extension tube 6 Suction port 4a Operation part 4b Switch off 4c Start switch 10 Electric blower 12, 12A, 12B, 12C Electric Blower Case 13 Elastic Support Body 14 Fan Part 15 Motor Part 17 Air Intake Port 18 Fan Cover 19 Bottom Plate Part 21 Rectifying Member 22 Intake Side Case Member 23 Exhaust Side Case Member 24 Inlet Port Side Wall 25 Seal Member Mounting Hole 27 Seal Member 28 Open side end portion 29 Open side end portion 30 Fitting groove 31 Fitting groove 32 Intake side case coupling portion 33 Exhaust side case coupling portion 34 Inner wall portion 38 Stepped surface 39 Elastic support fitting concave portion 40 Peripheral surface 41 Large diameter opening portion 42 1st truncated cone hollow body part 43 cylindrical body part 44 fitting part 45 large diameter opening part 46 2nd truncated cone hollow body part 47 small diameter part 48 ring body part 49 Side wall portion 50 Circumferential fitting groove portion 51 Sealing member mounting rib 52 Axial fitting groove portion 53 Small diameter portion 54 Case portion suction port 55 Exhaust port 57 Motor cover 58 Peripheral surface 59 Bottom plate portion 60 Bearing housing portion 62 Exhaust port side wall portion 63 Bearing Housing insertion convex part 64 Impact buffer member 65 Outer ring 66 Inner ring 67 Coil spring 69 Ring part 70 Reinforcement rib part 71 Projection part 73 Ring part 74 Projection part 75 Split part 76 Flange part 77 Brush mechanism 78 Locking concave part 79, 79A 79B, 79C Case part discharge port 80 Peripheral surface 82 Exhaust side case concave part 83 Side wall part 84 Spherical seat 86 Cylindrical spacer 87 Cylindrical spacer part opening 88 Intake side case part opening 110 Vacuum cleaner 111 Electric blower accommodating chamber 112 Tensile elastic support body 113 Outer ring 114 End face 115 Mounting rib 116 Inner ring 117 Coil bar 118 before the elastic body 119 front rib 120 end ribs 121 voids 125 after the rear elastic member 126 the ribs 127 void 128 dust collecting unit 129 partition plate 130 seal 131 cylindrical collar portion

Claims (5)

The vacuum cleaner body,
An electric blower case housed in the vacuum cleaner body;
An electric blower that is housed in the electric blower case and has a fan portion and a motor portion in which an exhaust port is formed ,
Said electric blower before Symbol electric blower case and a plurality of coil springs to be elastically supported,
The coil spring is provided spaced apart in the circumferential direction of the electric blower case, and a compressive force is urged in a radial direction of the electric blower,
The electric blower case includes one case member that restrains the radial displacement of the coil spring , and the other case member that is formed with a discharge port for discharging the air exhausted from the exhaust port from the inside of the electric blower case. Consisting of
The coil spring is a space between the electric blower and the electric blower case, and includes a first flow stream that includes a main stream line of exhaust flowing out of the electric blower case from the exhaust port through the discharge port. It is arrange | positioned by the 2nd space side other than . The vacuum cleaner characterized by the above-mentioned. The discharge port is
The vacuum cleaner according to claim 1, wherein the vacuum cleaner is formed on a peripheral surface of a case member in which the discharge port is formed. The discharge port is
The vacuum cleaner according to claim 1, wherein the vacuum cleaner is formed on a bottom plate portion of the case member in which the discharge port is formed. The discharge port is
The vacuum cleaner according to claim 3, wherein the vacuum cleaner is formed on a substantially entire surface of a bottom plate portion of the case member in which the discharge port is formed. The vacuum cleaner body,
An electric blower case housed in the vacuum cleaner body;
An electric blower that is housed in the electric blower case and has a fan portion and a motor portion in which an exhaust port is formed ,
Said electric blower before Symbol electric blower case and a plurality of coil springs to be elastically supported,
The coil spring is provided spaced apart in the circumferential direction of the electric blower case, and a compressive force is urged in a radial direction of the electric blower,
In the longitudinal direction of the electric blower, a plurality of rows of the coil springs are provided apart from each other,
The electric blower case restricts displacement of the coil spring in the radial direction, and a discharge port is formed between the adjacent coil spring rows to discharge air exhausted from the exhaust port from the inside of the electric blower case. One case member and the other case member ,
The coil spring is a space between the electric blower and the electric blower case, and includes a first flow stream that includes a main stream line of exhaust flowing out of the electric blower case from the exhaust port through the discharge port. It is arrange | positioned by the 2nd space side other than . The vacuum cleaner characterized by the above-mentioned.

Images