JP7202929B2 - dust collector - Google Patents

Description

The present invention relates to a dust collector.

In cleaning work, a dust collector as disclosed in Patent Document 1 is used.

JP 2016-073554 A

When the housing of the dust collector vibrates due to the rotation of the motor and blower fan, noise is generated due to the vibration, which makes the user of the dust collector feel uncomfortable.

An object of an aspect of the present invention is to suppress transmission of vibration and reduce noise caused by the vibration.

According to an aspect of the present invention, there are provided: a motor, a blower fan connected to the motor, a motor casing arranged around the motor, a motor base supporting the motor casing, and a housing accommodating the motor base. and a seal member connected to each of the motor base and the housing.

ADVANTAGE OF THE INVENTION According to the aspect of this invention, transmission of vibration can be suppressed and the noise resulting from vibration can be reduced.

FIG. 1 is a front perspective view of a dust collector according to an embodiment. FIG. 2 is a rear perspective view of the dust collector according to the embodiment. FIG. 3 is a front view showing the dust collector according to the embodiment. FIG. 4 is a side view showing the dust collector according to the embodiment. FIG. 5 is a cross-sectional view showing the dust collector according to the embodiment. FIG. 6 is a perspective view showing a drive unit according to the embodiment; FIG. 7 is a side view showing the drive unit according to the embodiment; FIG. 8 is a cross-sectional view showing the drive unit according to the embodiment. FIG. 9 is a top plan view of the drive unit according to the embodiment. FIG. 10 is a perspective view showing a support member according to the embodiment; FIG. 11 is a side view showing a support member according to the embodiment;

Hereinafter, embodiments according to the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiments.

In this embodiment, the terms "left", "right", "front", "rear", "upper", and "lower" are used to describe the positional relationship of each part. These terms indicate relative positions or directions with respect to the center of the dust collector 1 .

[Overview of dust collector]
FIG. 1 is a front perspective view of a dust collector 1 according to an embodiment. FIG. 2 is a rear perspective view of the dust collector 1 according to the embodiment. FIG. 3 is a front view showing the dust collector 1 according to the embodiment. FIG. 4 is a side view showing the dust collector 1 according to the embodiment. FIG. 5 is a cross-sectional view showing the dust collector 1 according to the embodiment, and corresponds to the cross-sectional view taken along line AA in FIG.

The dust collector 1 is a wet and dry dust collector capable of sucking not only air but also liquid. As shown in FIGS. 1 , 2 , 3 , 4 and 5 , the dust collector 1 includes a tank portion 2 and a body portion 3 arranged above the tank portion 2 . A latch 4 is provided on each of the left side and the right side of the tank portion 2 . The tank portion 2 and the body portion 3 are fixed by a latch 4 .

The tank part 2 has a suction port 5 to which a hose is connected. The suction port 5 is provided on the front surface of the tank portion 2 . The tank part 2 is supported by casters 6 . The casters 6 allow the dust collector 1 to move on the surface to be cleaned.

The body portion 3 has a housing 7 and a drive unit 100 housed in the housing 7 . Drive unit 100 includes motor 11 and blower fan 12 .

Housing 7 includes a lower housing 8 , an upper housing 9 and a middle housing 10 . A lower housing 8 is connected to the tank portion 2 . An opening is provided in the upper portion of the tank portion 2 . The lower housing 8 is connected to the tank portion 2 so as to cover the opening of the tank portion 2 . The upper housing 9 is arranged above the lower housing 8 . The middle housing 10 is arranged between the lower housing 8 and the upper housing 9 . The lower housing 8, upper housing 9 and middle housing 10 are connected. As shown in FIG. 5, the lower housing 8, the upper housing 9 and the middle housing 10 are fixed by screws 7C.

Motor 11 generates power for rotating blower fan 12 . The body portion 3 has a battery mounting portion to which a battery for the power tool is mounted. The motor 11 is driven by power supplied from a battery.

The body portion 3 has an operation panel 15 , an operation plate 16 , a handle 17 and a cover member 19 . The operation panel 15 is provided on the front surface of the main body portion 3 . The operation panel 15 includes a main power switch 15A, a suction power adjustment switch 15B, and a display section 15C that displays the remaining battery capacity.

The operation plate 16 is rotatably supported by the upper housing 9 . An operation switch is arranged on the back surface of the operation plate 16 . A switch display portion 16A is provided on the surface of the operation plate 16 .

The handle 17 is rotatably supported by the upper housing 9 . The handle 17 is arranged behind the operation plate 16 . A user of the dust collector 1 can carry the dust collector 1 while holding the handle 17. - 特許庁

The cover member 19 is rotatably supported by the upper housing 9 . The cover member 19 is fixed to the housing 7 by hooks 19F. The cover member 19 is arranged behind the handle 17 . A battery mounting portion is provided on the outer surface of the rear portion of the upper housing 9 . The cover member 19 forms an accommodation space with the upper housing 9 in which the battery mounting portion is accommodated.

The housing 7 has an exhaust port 62 through which air from the drive unit 100 is exhausted, a cooling intake port 64 through which air for cooling the motor 11 is taken in, and a cooling exhaust port through which air after cooling the motor 11 is exhausted. 65.

The exhaust ports 62 are provided on both side surfaces of the upper housing 9 . A cooling intake port 64 is provided on the left side surface of the upper housing 9 . The cooling exhaust port 65 is provided on the right side surface of the upper housing 9 .

The motor 11 has a stator, a rotor, and an output shaft 11S connected to the rotor. The output shaft 11S is rotatably supported by bearings 11A and 11B. The bearing 11A rotatably supports the lower portion of the output shaft 11S. The bearing 11B rotatably supports the upper portion of the output shaft 11S. A blower fan 12 is fixed to the lower end of the output shaft 11S. A cooling fan is fixed to the upper end of the output shaft 11S. When the motor 11 is driven, each of the blower fan 12 and the cooling fan rotates.

A suction force is generated in the suction port 5 by rotating the blower fan 12 . The air sucked into the internal space of the tank portion 2 through the suction port 5 flows through the internal space of the tank portion 2 and then flows into the blower fan 12 . The blower fan 12 is a centrifugal fan. The air that has flowed into the blower fan 12 is discharged to an exhaust passage 61 provided around the blower fan 12 . In addition, as shown in FIG. 5 , a sound absorbing member 63 such as a sponge is arranged in the exhaust flow path 61 . The exhaust channel 61 is connected to the exhaust port 62 . The air that has passed through the blower fan 12 and flowed through the exhaust passage 61 is discharged to the external space of the housing 7 via the exhaust port 62 .

Rotation of the cooling fan causes the air in the outer space of the housing 7 to flow into the inner space of the housing 7 via the cooling intake port 64 . The air that has flowed into the internal space of the housing 7 from the cooling air intake port 64 is supplied to the motor 11 after passing through a cooling supply channel provided in the internal space of the housing 7 . The air supplied to the motor 11 cools the motor 11 . After cooling the motor 11 , the air flows through the cooling exhaust passage provided in the inner space of the housing 7 . The cooling exhaust channel is connected to the cooling exhaust port 65 . The air that has flowed through the cooling exhaust passage is discharged to the external space of the housing 7 via the cooling exhaust port 65 .

[Base member and sealing member]
FIG. 6 is a perspective view showing the drive unit 100 according to the embodiment. FIG. 7 is a side view showing the drive unit 100 according to the embodiment. FIG. 8 is a cross-sectional view showing the drive unit 100 according to the embodiment. FIG. 9 is a top plan view of the drive unit 100 according to the embodiment.

As shown in FIGS. 5, 6, 7, 8, and 9, the drive unit 100 includes a motor 11, a blower fan 12 connected to the motor 11, and a motor casing disposed around the motor 11. 13, a fan cover 14 arranged around the blower fan 12, a motor base 20 supporting the motor casing 13, a sealing member 30 connected to each of the motor base 20 and the housing 7, and supporting the fan cover 14. and a support member 40 for Housing 7 has an internal space in which drive unit 100 is arranged. Drive unit 100 is housed in housing 7 .

The motor 11 generates power to rotate the blower fan 12 . The motor 11 is arranged inside the motor casing 13 . Motor 11 is supported by motor casing 13 . In the embodiment, the motor 11 is supported by the motor casing 13 so that the rotation axis AX of the output shaft 11S of the motor 11 extends vertically. The direction parallel to the rotation axis AX of the motor 11 is the vertical direction.

The blower fan 12 is rotated by power generated by the motor 11 . The blower fan 12 rotates around the rotation axis AX. The blower fan 12 is arranged below the motor 11 . The blower fan 12 is fixed to the lower end of the output shaft 11S. The blower fan 12 is a centrifugal fan. When the blower fan 12 rotates, air flows into the blower fan 12 from below the blower fan 12 . The air that has passed through the blower fan 12 is discharged from the blower fan 12 to the outside in the radial direction of the rotation axis AX.

Motor casing 13 houses motor 11 . Motor casing 13 is arranged to surround motor 11 . The motor casing 13 is a cylindrical member arranged around the motor 11 . The upper end of the motor casing 13 is arranged above the upper end of the motor 11 and the bearing 11B. The motor casing 13 is made of synthetic resin such as polycarbonate resin.

The fan cover 14 is arranged around the blower fan 12 . Fan cover 14 is supported by motor base 20 . The fan cover 14 is detachable from the motor base 20 . The fan cover 14 includes a bottom plate portion 14A arranged below the blower fan 12 and a side plate portion 14B arranged radially outward of the rotation axis AX from the blower fan 12 . The fan cover 14 has an inlet 14L through which the air flowing into the blower fan 12 passes, and an outlet 14M through which the air discharged from the blower fan 12 flows. 14 L of inflow ports are provided in the center part of the baseplate part 14A. The outflow port 14M is provided in the side plate portion 14B. A plurality of outflow ports 14M are provided in the circumferential direction of the rotation axis AX.

Motor base 20 supports motor casing 13 . At least part of the motor base 20 is arranged around the motor casing 13 . The motor base 20 is made of synthetic resin such as polycarbonate resin.

Motor base 20 includes a plate portion 21 that supports fan cover 14 and a tubular portion 22 that is arranged around motor casing 13 . The plate portion 21 is connected to the fan cover 14 . The inner surface of the cylindrical portion 22 and the outer surface of the motor casing 13 face each other with a gap therebetween.

The plate portion 21 is connected to the lower end portion of the tubular portion 22 . The plate portion 21 is annular. An opening 21M is provided in the central portion of the plate portion 21 . A lower end portion of the motor casing 13 is arranged in an opening portion 21</b>M of the plate portion 21 . The plate portion 21 supports the motor casing 13 . Also, the output shaft 11S of the motor 11 is arranged in the opening 21M. A lower end portion of the output shaft 11S is arranged below the lower surface of the plate portion 21 .

The plate portion 21 extends radially outward from the rotation axis AX from the lower end portion of the cylindrical portion 22 . A peripheral wall portion 23 is connected to the outer edge portion of the plate portion 21 . The peripheral wall portion 23 protrudes upward from the outer edge portion of the plate portion 21 . The peripheral wall portion 23 is connected to the inner surface of the side plate portion 14B of the fan cover 14 .

The tubular portion 22 protrudes upward from the plate portion 21 . The cylindrical portion 22 is arranged so as to surround the motor casing 13 . The upper end of the cylindrical portion 22 is arranged above the upper end of the motor 11 and the bearing 11B. In the vertical direction, the position of the upper end of the cylindrical portion 22 and the position of the upper end of the motor casing 13 are substantially the same. Note that the upper end portion of the cylindrical portion 22 may be arranged above the upper end portion of the motor casing 13 . The upper end of the cylindrical portion 22 may be arranged below the upper end of the motor casing 13 .

The outer shape of the cylindrical portion 22 is smaller than the outer shape of the plate portion 21 in a plane perpendicular to the rotation axis AX. That is, the distance between the rotation axis AX and the outer edge of the cylindrical portion 22 is shorter than the distance between the rotation axis AX and the outer edge of the plate portion 21 in the plane orthogonal to the rotation axis AX.

A seal member 30 is connected to each of the motor base 20 and the housing 7 . The seal member 30 seals the boundary between the upper end of the motor base 20 and the inner surface of the housing 7 . The sealing member 30 is made of synthetic rubber such as nitrile rubber (NBR) or silicone rubber.

The seal member 30 is also connected to the motor casing 13 . The seal member 30 seals the boundary between the upper end of the motor casing 13 and the inner surface of the housing 7 .

The seal member 30 prevents foreign matter around the seal member 30 from entering the inside of the motor base 20 and the inside of the motor casing 13 . Foreign matter includes dust and liquids.

The seal member 30 is connected to the upper end portion of the cylindrical portion 22 of the motor base 20 and the upper end portion of the motor casing 13 .

The seal member 30 includes a first ring portion 30A connected to the motor base 20, a second ring portion 30B arranged inside the first ring portion 30A and connected to the motor casing 13, and a first ring portion 30A and the second ring portion 30B. and a connection portion 30C that connects a part of the two ring portions 30B.

The first ring portion 30A has an inner surface facing the outer surface of the second ring portion 30B. The inner surface of the first ring portion 30A and the outer surface of the second ring portion 30B face each other with a gap therebetween. A concave portion 32R is provided in a portion of the inner surface of the first ring portion 30A. The recessed portion 32R is provided so as to be recessed outward in the radial direction of the rotation axis AX in a partial region of the inner surface on the front side of the first ring portion 30A.

The connecting portion 30C connects a partial region of the rear inner surface of the first ring portion 30A and a partial region of the rear outer surface of the second ring portion 30B. Seal member 30 is a unitary member. Since the first ring portion 30A and the second ring portion 30B are not separated, the user can handle the sealing member 30 smoothly.

The space 31 inside the second ring portion 30</b>B is connected to the space inside the motor casing 13 while the seal member 30 is connected to the motor base 20 and the motor casing 13 . Also, the space 32 between the outer surface of the second ring portion 30B and the inner surface of the first ring portion 30A is connected to the space 39 between the outer surface of the motor casing 13 and the inner surface of the cylinder portion 22 .

As shown in FIG. 8, the first ring portion 30A has a groove 33 in which the upper end portion of the cylindrical portion 22 is arranged. The groove 33 is provided on the lower surface of the first ring portion 30A. The second ring portion 30B has a groove 34 in which the upper end of the motor casing 13 is arranged. The groove 34 is provided on the lower surface of the second ring portion 30B.

As shown in FIG. 5, the first ring portion 30A is connected to a first rib 9A provided on the inner surface of the upper housing 9. As shown in FIG. The second ring portion 30B is connected to a second rib 9B provided on the inner surface of the upper housing 9 . Each of the first rib 9A and the second rib 9B protrudes downward from at least a portion of the inner surface of the upper housing 9 .

The first ring portion 30A has a groove 36 in which the first rib 9A is arranged. The groove 36 is provided on the upper surface of the first ring portion 30A. The second ring portion 30B has grooves 37 in which the second ribs 9B are arranged. The groove 37 is provided on the upper surface of the second ring portion 30B.

As described above, air for cooling the motor 11 flows into the motor casing 13 . As indicated by the arrows in FIG. 8, the air that has flowed into the internal space of the housing 7 through the cooling air intake port 64 flows through the cooling supply flow path provided in the internal space of the housing 7, and then flows through the second ring portion. It flows into the space 31 inside 30B. Air enters the space 31 from the upper end of the space 31 . The air that has flowed through the space 31 flows into the motor casing 13 . Motor 11 is cooled by circulating air inside motor casing 13 . An opening connecting the inside of the motor casing 13 and the space 39 is provided in the lower portion of the motor casing 13 . The air that has circulated inside the motor casing 13 flows into the space 39 through an opening provided in the lower portion of the motor casing 13 . The air that has flowed into the space 39 flows upward in the space 39 and then flows into the space 32 between the second ring portion 30B and the first ring portion 30A. The air that has flowed through the space 32 is discharged from the upper end of the space 32 . The air discharged from the space 32 is discharged to the external space of the housing 7 through the cooling exhaust port 65 after flowing through the cooling exhaust passage provided in the internal space of the housing 7 .

The space 31 inside the second ring portion 30B functions as a supply passage through which the air flowing into the motor casing 13 flows. A space 32 between the second ring portion 30B and the first ring portion 30A functions as a discharge passage through which the air discharged from the inside of the motor casing 13 flows. A space 39 between the motor casing 13 and the cylindrical portion 22 functions as an air flow path through which the air discharged from the inside of the motor casing 13 flows.

In the following description, the space 31 will be referred to as the supply channel 31, the space 32 will be referred to as the discharge channel 32, and the space 39 will be referred to as the air channel 39.

The discharge channel 32 is slit-shaped in a plane perpendicular to the rotation axis AX. In addition, the discharge channel 32 is substantially arcuate in a plane perpendicular to the rotation axis AX. In the concave portion 32R, the dimension of the discharge passage 32 in the radial direction of the rotation axis AX is large. For example, a cable connected to the motor 11 is arranged in the recess 32R.

[Buffer member]
As shown in FIG. 8, a cushioning member 50 is arranged around the bearing 11B. A buffer member 50 is arranged between the bearing 11B and the motor casing 13 . The cushioning member 50 is made of synthetic rubber such as nitrile rubber (NBR) or silicone rubber. The damping member 50 suppresses transmission of vibration generated by the motor 11 to the motor casing 13 .

[Support member]
FIG. 10 is a perspective view showing the support member 40 according to the embodiment. FIG. 11 is a side view showing the support member 40 according to the embodiment.

As shown in FIGS. 5, 10, and 11, the support member 40 has a flange portion 41, a cylinder portion 42, and a rib portion 43. As shown in FIGS. Support member 40 is made of synthetic rubber such as nitrile rubber (NBR) or silicone rubber.

The support member 40 also has a blow passage 44 through which the air flowing into the blow fan 12 flows, and a sealing surface 45 arranged around the upper end of the blow passage 44 and in contact with the fan cover 14 .

The flange portion 41 has a sealing surface 45 . The sealing surface 45 faces upward so as to contact the bottom surface of the bottom plate portion 14A of the fan cover 14 . The flange portion 41 also has a back surface 46 facing away from the sealing surface 45 . The back surface 46 faces downward. An opening is provided in the central portion of the flange portion 41 . A part of the ventilation passage 44 is defined by the opening of the flange portion 41 .

The cylinder portion 42 is provided below the flange portion 41 . The cylinder portion 42 has at least a portion of the ventilation passage 44 . A space inside the cylinder portion 42 defines a part of the ventilation passage 44 .

The rib portion 43 is connected to the rear surface 46 of the flange portion 41 and the outer surface of the cylinder portion 42 respectively. A plurality of rib portions 43 are provided in the circumferential direction of the rotation axis AX.

The support member 40 supports the fan cover 14 so that the air passage 44 and the inlet 14L of the fan cover 14 are connected. The seal surface 45 is in close contact with the lower surface of the bottom plate portion 14A.

[motion]
The operation of the dust collector 1 will be described. When the motor 11 is driven, each of the blower fan 12 and the cooling fan rotates.

A suction force is generated in the suction port 5 by rotating the blower fan 12 . The air sucked into the internal space of the tank portion 2 from the suction port 5 flows through the internal space of the tank portion 2 and then flows into the ventilation passage 44 of the support member 40 . Air flows into the air passage 44 from below the air passage 44 . The air that has flowed through the blowing passage 44 flows into the blowing fan 12 via the inlet 14L of the fan cover 14 . A seal surface 45 of the support member 40 is in close contact with the lower surface of the bottom plate portion 14A of the fan cover 14 . A boundary between the support member 40 and the fan cover 14 is sealed by a sealing surface 45 . That is, the support member 40 is a sealing member that seals the boundary between the support member 40 and the fan cover 14 . As a result, the air that has flowed through the blowing passage 44 is prevented from leaking through the boundary between the support member 40 and the fan cover 14 . The air that has flowed through the blowing passage 44 flows into the blowing fan 12 via the inlet 14L.

The air that has flowed into the blower fan 12 is discharged to an exhaust passage 61 provided around the blower fan 12 . The air that has flowed through the exhaust passage 61 is discharged to the external space of the housing 7 via the exhaust port 62 .

Vibration may occur due to the rotation of the motor 11 and the blower fan 12 . The motor base 20 and the motor casing 13 and the upper housing 9 are connected via a seal member 30 . The seal member 30 is made of synthetic rubber and can suppress transmission of vibration. That is, the sealing member 30 is a vibration isolating member having a vibration isolating function. Therefore, the seal member 30 suppresses transmission of vibration generated in the motor 11 and the blower fan 12 to the housing 7 . Since transmission of vibrations to the housing 7 is suppressed, generation of noise caused by the vibrations is suppressed.

Moreover, the support member 40 is also made of synthetic rubber, and can suppress the transmission of vibration. That is, the support member 40 is a vibration isolation member having a vibration isolation function. Therefore, the support member 40 suppresses transmission of vibration generated in the motor 11 and the blower fan 12 to the housing 7 . Since transmission of vibrations to the housing 7 is suppressed, generation of noise caused by the vibrations is suppressed.

The dust collector 1 is a wet and dry dust collector. When liquid is sucked through the suction port 5 , the seal member 30 prevents the liquid from entering the motor casing 13 . That is, the sealing member 30 is a waterproof member having a waterproof function. This suppresses contact between the motor 11 and the liquid.

[effect]
As explained above, the seal member 30 is arranged between the motor base 20 and the housing 7 . Motor base 20 supports motor casing 13 . Fan cover 14 is supported by motor base 20 . Rotation of the motor 11 and the blower fan 12 may cause the motor base 20 to vibrate. Since the seal member 30 is arranged between the motor base 20 and the housing 7 , transmission of vibration generated in the motor 11 and the blower fan 12 to the housing 7 is suppressed. Therefore, noise caused by vibration is reduced. Therefore, giving discomfort to the user of the dust collector 1 is suppressed.

Further, when liquid is sucked from the suction port 5 , the seal member 30 prevents the liquid from entering the motor casing 13 . This suppresses contact between the motor 11 and the liquid.

Thus, the sealing member 30 can function as a vibration isolating member and a waterproof member.

The seal member 30 is connected not only to the motor base 20 but also to the motor casing 13 . Thereby, it is possible to effectively suppress transmission of vibration generated in the motor 11 and the blower fan 12 to the housing 7 . Therefore, noise caused by vibration can be effectively reduced. In addition, it is possible to effectively prevent the liquid from entering the motor casing 13 .

In the vertical direction, the position of the upper end of the motor base 20 connected to the seal member 30 and the position of the upper end of the motor casing 13 are substantially the same. Therefore, the seal member 30 can be connected to each of the motor base 20 and the motor casing 13 .

The seal member 30 connects a first ring portion 30A connected to the motor base 20, a second ring portion 30B connected to the motor casing 13, and a part of the first ring portion 30A and the second ring portion 30B. and a connecting portion 30C. Seal member 30 is a unitary member. As a result, the user can smoothly handle the sealing member 30 while ensuring the anti-vibration function and waterproof function of the sealing member 30 .

The first ring portion 30A is connected to a first rib 9A provided on the inner surface of the housing 7. As shown in FIG. The second ring portion 30B is connected to a second rib 9B provided on the inner surface of the housing 7. As shown in FIG. Thereby, the boundary between the seal member 30 and the housing 7 is sufficiently sealed.

The sealing member 30 has a supply passage 31 through which air flowing into the motor casing 13 flows, and a discharge passage 32 through which air discharged from the motor casing 13 flows. As a result, the air for cooling the motor 11 is smoothly supplied to the motor 11, and the air after cooling the motor 11 is smoothly discharged.

The outer shape of the cylindrical portion 22 is smaller than the outer shape of the plate portion 21 in a plane perpendicular to the rotation axis AX. The seal member 30 is connected to the tubular portion 22 . As a result, even if the angle of the rotating shaft of the blower fan 12 fluctuates during the rotation of the blower fan 12, the vibration of the housing 7 is suppressed. That is, since the outer shape of the cylindrical portion 22 is small and the height of the cylindrical portion 22 is sufficiently high, even when the blower fan 12 swings, the amplitude of vibration at the upper end portion of the cylindrical portion 22 can be reduced. As a result, the vibration of the housing 7 can be effectively suppressed, and the noise caused by the vibration can be effectively reduced.

The outer surface of the motor casing 13 and the inner surface of the cylindrical portion 22 of the motor base 20 face each other with a gap therebetween. An air flow path 39 is provided between the motor casing 13 and the tubular portion 22, through which the air discharged from the inside of the motor casing 13 flows. As a result, the air after cooling the motor 11 is smoothly discharged.

A buffer member 50 is arranged between the bearing 11B and the motor casing 13 . The damping member 50 suppresses transmission of vibration generated by the motor 11 to the motor casing 13 .

A support member 40 for supporting the fan cover 14 includes a ventilation passage 44 connected to the inlet 14L of the fan cover 14 and a seal disposed around the upper end portion of the ventilation passage 44 and in close contact with the lower surface of the bottom plate portion 14A of the fan cover 14. It has a face 45 . Air can smoothly flow into the blower fan 12 through the blower passage 44 . The sealing surface 45 suppresses leakage of the air that has flowed through the ventilation passage 44 through the boundary between the support member 40 and the fan cover 14 . The air that has flowed through the blowing passage 44 can flow into the blowing fan 12 via the inlet 14L. Further, the support member 40 suppresses transmission of vibration generated in the motor 11 and the blower fan 12 to the housing 7 .

Thus, the support member 40 can function as a sealing member and a vibration isolating member.

The support member 40 includes rib portions 43 that are connected to the rear surface 46 of the flange portion 41 and the outer surface of the cylinder portion 42 respectively. Thereby, the shape and strength of the support member 40 are maintained.

[Other embodiments]
In the above-described embodiment, at least part of the motor base 20 is arranged around the motor casing 13 . For example, the upper end of the cylindrical portion 22 may be arranged below the upper end of the motor 11 . Also, the cylindrical portion 22 may be omitted. By sufficiently increasing the vertical dimension of the first rib 9A and the second rib 9B, and sufficiently increasing the vertical dimension of the seal member 30, the motor base 20 is positioned around the motor casing 13. The seal member 30 can be connected to each of the motor base 20 and the housing 7 even if it is not arranged in the housing 7 .

In the above-described embodiment, the first ring portion 30A and the second ring portion 30B are connected via the connection portion 30C. The connecting portion 30C may be omitted. The seal member 30 may be composed of two members, a first ring portion 30A and a second ring portion 30B.

In the above-described embodiment, the dust collector 1 is movable on the surface to be cleaned by the casters 6 . Casters 6 may be omitted. The dust collector 1 may be a so-called box type dust collector that is held by the user or supported on the user's shoulder via a shoulder belt.

In the above-described embodiment, the dust collector 1 is a wet and dry dust collector. The dust collector 1 may be a dry dust collector.

DESCRIPTION OF SYMBOLS 1... Dust collector, 2... Tank part, 3... Main part, 4... Latch, 5... Suction port, 6... Caster, 7... Housing, 7C... Screw, 8... Lower housing, 9... Upper housing, 9A... Third DESCRIPTION OF SYMBOLS 1 rib 9B... 2nd rib 10... Middle housing 11... Motor 11A... Bearing 11B... Bearing 11S... Output shaft 12... Blower fan 13... Motor casing 14... Fan cover 14A... Bottom plate part , 14B... Side plate part 14L... Inlet 14M... Outlet 15... Operation panel 15A... Main power switch 15B... Suction power adjustment switch 15C... Display part 16... Operation plate 16A... Switch display part DESCRIPTION OF SYMBOLS 17... Handle 19... Cover member 19F... Hook 20... Motor base 21... Plate part 21M... Opening part 22... Cylindrical part 23... Peripheral wall part 30... Seal member 30A... First ring part, 30B... second ring portion, 30C... connection portion, 31... space (supply channel), 32... space (discharge channel), 32R... concave portion, 33... groove, 34... groove, 36... groove, 37... groove, 39... Space (air flow path) 40... Support member 41... Flange part 42... Cylinder part 43... Rib part 44... Ventilation passage 45... Seal surface 50... Buffer member 61... Exhaust flow path 62... exhaust port, 63... sound absorbing member, 64... cooling intake port, 65... cooling exhaust port, 100... drive unit, AX... rotating shaft.

Claims (14)

a motor;
a blower fan connected to the motor;
a motor casing disposed around the motor;
a motor base supporting the motor casing;
A dust collector comprising a housing that accommodates the motor base,
a seal member connected to each of the motor base and the housing ;
A dust collector , wherein the seal member has a supply channel through which air flowing into the motor casing flows, and a discharge channel through which air discharged from the motor casing flows . 2. The dust collector according to claim 1, wherein at least part of said motor base is arranged around said motor casing. a motor;
a blower fan connected to the motor;
a motor casing disposed around the motor;
a motor base supporting the motor casing;
A dust collector comprising a housing that accommodates the motor base,
a seal member connected to each of the motor casing and the housing ;
A dust collector , wherein the seal member has a supply channel through which air flowing into the motor casing flows, and a discharge channel through which air discharged from the motor casing flows . 4. The motor according to claim 3, wherein the position of the end of the motor base connected to the seal member and the position of the end of the motor casing are substantially equal in a direction parallel to the rotation axis of the motor. Dust collector as described. The seal member includes a first ring portion connected to the motor base, a second ring portion arranged inside the first ring portion and connected to the motor casing, and a ring portion connected to the motor casing. 5. The dust collector according to claim 3 or 4, further comprising a connecting portion that connects a portion of the ring portion. The first ring portion is connected to a first rib provided on the inner surface of the housing,
6. The dust collector according to claim 5, wherein the second ring portion is connected to a second rib provided on the inner surface of the housing. a bearing that rotatably supports the output shaft of the motor;
The dust collector according to any one of claims 1 to 6 , further comprising a buffer member arranged between the bearing and the motor casing. A fan cover arranged around the blower fan,
The dust collector according to any one of claims 1 to 7 , wherein the fan cover is supported by the motor base. a motor;
a blower fan connected to the motor;
a motor casing disposed around the motor;
a motor base supporting the motor casing;
A dust collector comprising a housing that accommodates the motor base,
a seal member connected to each of the motor base and the housing ;
a fan cover arranged around the blower fan,
The fan cover is supported by the motor base,
the motor base includes a plate portion that supports the fan cover; and a tubular portion that is arranged around the motor casing,
A dust collector , wherein the sealing member is connected to the cylindrical portion . a motor;
a blower fan connected to the motor;
a motor casing disposed around the motor;
a motor base supporting the motor casing;
A dust collector comprising a housing that accommodates the motor base,
a seal member connected to each of the motor casing and the housing ;
a fan cover arranged around the blower fan,
The fan cover is supported by the motor base,
the motor base includes a plate portion that supports the fan cover; and a tubular portion that is arranged around the motor casing,
A dust collector , wherein the sealing member is connected to the cylindrical portion . 11. The dust collector according to claim 9 or 10, wherein the outer shape of the cylindrical portion is smaller than the outer shape of the plate portion in a plane orthogonal to the rotating shaft of the motor. 12. The apparatus according to any one of claims 9 to 11, wherein an air flow path through which air discharged from inside the motor casing flows is provided between the motor casing and the cylindrical portion. Dust collector. 12. A support member having a sealing surface that is arranged around an end portion of the blow passage through which air flowing into the blow fan circulates and the blow passage and comes into contact with the fan cover. The dust collector according to any one of . The support member includes a flange portion having the sealing surface and a back surface facing the opposite side of the sealing surface, a cylinder portion having at least a portion of the air passage, and a back surface of the flange portion and an outer surface of the cylinder portion. 14. A dust collector according to claim 13 , comprising a rib portion connected to the .

Images