JP2022045844A - Filter device and working machine - Google Patents

Abstract

To provide a filter device capable of suppressing deformation of a holder.SOLUTION: A holder 42 has a first cylinder part 43, a first pillar part 44, a second pillar part 45, bridge parts 46 to 48, a second cylinder part 49, a tapered part 50, and a bridge part 51. The first pillar part 44 and the second pillar part 45 each extend forward from the first cylinder part 43. The first pillar part 44 has a base part 44a and a rib 44b. Height in the radial direction of the rib 44b is greater than thickness in the radial direction of the base part 44a at least in one part. Height in the radial direction of the rib 44b varies depending on positions in an axial direction. To be specific, the rib 44b is higher in the radial direction toward the front side within a range at a prescribed length from a rear end.SELECTED DRAWING: Figure 4

Description

The present invention relates to a filter device that can be used for a working machine such as a cleaner, and a working machine provided with the filter device.

In a working machine such as a cleaner, a filter device is provided as disclosed in Patent Document 1. The filter device comprises a breathable filter and a rigid holder that supports the filter. When the fan of the cleaner is driven, air flows from the outside of the filter to the inside so as to pass through the filter. At this time, the holder supports the filter so that the filter does not deform inward. The rear end of the holder is formed in an annular shape that abuts around the intake port of the cleaner main body, and prevents air from flowing toward the intake port without passing through the filter.

Japanese Unexamined Patent Publication No. 2016-67664

If the suction force of the cleaner is increased, the holder cannot withstand the force that the filter tries to deform inward, and there is a risk that the holder will be deformed. Specifically, when the side surface portion of the holder is deformed inward, there is a possibility that the rear end portion of the holder is deformed so as to be uneven in the axial direction. When such deformation occurs, a gap is created between the periphery of the intake port of the cleaner main body and the rear end of the holder, and an air flow toward the intake port without passing through the filter is generated.

An object of the present invention is to provide a filter device capable of suppressing deformation of a holder. Another object of the present invention is to provide a working machine capable of suppressing the intrusion of dust into the working machine main body by suppressing the deformation of the holder of the filter device.

One aspect of the present invention is a filter device attached to a working machine that collects dust from an air stream.
Breathable bag-shaped filter and
With a holder that supports the filter,
The holder is
A cylinder extending in the axial direction and
It has a plurality of pillar portions that are formed so as to extend from the tubular portion to one side in the axial direction and that abut with the filter to suppress deformation of the filter.
At least one of the plurality of pillars has a base and ribs erected from the base in the radial direction about the axis.
The height of the rib in the radial direction is larger than the thickness of the base.

The height of the rib in the radial direction may differ depending on the position in the axial direction.

The height of the rib in the radial direction may be higher on one side in the axial direction than on the other side in the axial direction.

The plurality of pillars may include a first pillar in which the rib is provided and a second pillar in which a ridge having a height lower than the rib is provided.

It has a plurality of bridges extending in a direction intersecting the axial direction and passing between the plurality of pillars.
The number of the bridge portions connected to the central portion of the first pillar portion in the axial direction may be smaller than the number of the bridge portions connected to the central portion of the second pillar portion in the axial direction. ..

The radial height of the ribs may be higher than the width of the base at least in part.

Another aspect of the present invention is a working machine. This work machine
A motor with a drive shaft and
A fan that rotates by the driving force of the drive shaft,
A main body housing that houses the motor and the fan inside,
An intake port provided in the main body housing and allowing an air flow generated by the fan to flow into the main body housing.
The filter device is attached to the main body housing so that the cylinder portion abuts around the intake port.

It has a frame provided inside the filter device and has a frame.
The frame may have a plurality of bone portions inclined with respect to the axial direction, and may have a shape in which the outer dimensions gradually decrease toward the one side in the axial direction.

The filter device is attached to the main body housing by being rotated relative to the axis.
The bone portion of the frame may be located on the inner peripheral side of the rib of the holder in the radial direction about the axis.

It should be noted that any combination of the above components and a conversion of the expression of the present invention between methods, systems and the like are also effective as aspects of the present invention.

According to the present invention, it is possible to provide a filter device capable of suppressing deformation of the holder. Further, according to the present invention, it is possible to provide a working machine capable of suppressing the intrusion of dust into the working machine main body by suppressing the deformation of the holder of the filter device.

A side sectional view of the working machine 1 according to the first embodiment of the present invention. Top sectional view of the fan motor unit 6 of the working machine 1. FIG. 1 is a sectional view taken along line III-III. The perspective view of the holder 42 of the filter apparatus 40 of the work machine 1. Side view of the holder 42. FIG. 5 is a sectional view taken along line VI-VI of FIG. FIG. 6 is a sectional view taken along line VII-VII of FIG. FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. FIG. 6 is a cross-sectional view taken along the line IX-IX in FIG. FIG. 3 is a cross-sectional view showing that the rib 44b of the holder 42 does not interfere with the bone portion 62 of the frame 60 in the process of assembling the holder 42 to the main body housing 2 of the working machine 1. 2 is a side sectional view of the holder 42A according to the second embodiment of the present invention. FIG. 3 is a side sectional view of the holder 42B according to the third embodiment of the present invention. A side sectional view of the holder 42B when deformed.

In the following, the same or equivalent components, members, etc. shown in the drawings are designated by the same reference numerals, and duplicate description thereof will be omitted as appropriate. The embodiment is not limited to the invention but is an example. Not all features and combinations thereof described in embodiments are essential to the invention.

(Embodiment 1)
The first embodiment of the present invention will be described with reference to FIGS. 1 to 10. The present embodiment relates to the working machine 1. The working machine 1 is a cordless and portable non-cyclone type cleaner (electric vacuum cleaner). FIGS. 1 and 3 define front-back, up-down, and left-right directions orthogonal to each other in the working machine 1. The left-right direction is defined based on the case where the work machine 1 is viewed from the front.

The outer shell of the working machine 1 is composed of a main body housing 2 and a dust case 3. Both the main body housing 2 and the dust case 3 are, for example, resin molded bodies. The dust case 3 is detachably connected and fixed to the front of the main body housing 2. A dust case intake port 3a is provided at the front end of the dust case 3. An extension pipe or a flexible hose (not shown) can be attached to the dust case intake port 3a.

A filter device 40 is provided inside the dust case 3. The filter device 40 covers the main body intake port 2d that opens at the front end portion of the main body housing 2. The main body intake port 2d is a through hole inside the flange portion 2i of the main body housing 2. The front end portion of the fan motor unit 6 and the seal member 30 extend within the main body intake port 2d. A frame 60 is provided inside the filter device 40. The frame 60 is a support that supports a non-woven fabric filter (not shown) from the inside, but here, it is assumed that the non-woven fabric filter is not provided. When a non-woven fabric filter is provided, the filter device 40 is unnecessary.

As shown in FIG. 3, the main body housing 2 has a left-right split structure. That is, the main body housing 2 is formed by fixing and integrating the left housing 2f and the right housing 2g, which are separate parts from each other, with each other by screwing or the like. The main body housing 2 has an accommodating portion 2a, a handle portion 2b, and a battery pack mounting portion 2c.

The accommodating portion 2a is a portion corresponding to the front portion of the main body housing 2. The accommodating portion 2a accommodates the fan motor unit 6 and the like. The handle portion 2b is a portion extending rearward from the upper end portion of the accommodating portion 2a. The operator grips the handle portion 2b and handles the work machine 1. An operation panel (switch portion) 5 is provided on the upper surface of the handle portion 2b. Various switches provided on the operation panel 5 can start and stop the work machine 1 and switch the air volume of the work machine 1. The battery pack mounting portion 2c is a portion corresponding to the rear lower portion of the main body housing 2. A battery pack 4 that serves as a power source for the working machine 1 is detachably mounted on the battery pack mounting portion 2c. Exhaust ports 2e are provided on both left and right sides of the rear end of the main body housing 2.

As shown in FIG. 2, the fan motor unit 6 is a well-known unit having a motor 6a, a fan 6b, a unit case 6e, and a control board 8 integrally. The fan motor unit 6 operates with the power supplied from the battery pack 4. The motor 6a is a brushless electric motor. The axial direction of the rotation shaft (drive shaft) 6c of the motor 6a is parallel to the front-rear direction. The fan 6b is a centrifugal fan provided on the rotating shaft 6c, and rotates integrally with the rotating shaft 6c to generate an air flow for collecting dust. The unit case 6e has a unit intake port 6d at the front end portion. The unit intake port 6d is located in front of the fan 6b and opens facing forward. The unit intake port 6d is located inside the main body intake port 2d. The control board 8 functions as a control unit that controls the drive of the motor 6.

The main body housing 2 has a tubular portion 2h and a flange portion 2i protruding inward from the tubular portion 2h at the front end portion. The tubular portion 2h is a cylindrical portion whose axial direction is parallel to the front-rear direction. The flange portion 2i is a plate-shaped portion perpendicular to the front-rear direction. The flange portion 2i is provided so as to go around the extension line of the rotation shaft 6a of the fan motor unit 6. Hereinafter, the entire axis including the axis of the rotating shaft 6a and its extension is also referred to as a “central axis”. The inner edge of the flange portion 2i is the opening edge of the main body intake port 2d. The main body intake port 2d is a circular through hole centered on the central axis and penetrating in the extending direction of the rotating shaft 6a. The main body intake port 2d is formed so as to straddle the left main body housing 2f and the right main body housing 2g. The main body intake port 2d communicates with the space inside the dust case 3. The front of the main body intake port 2d is covered with the filter device 40.

The seal member 30 is an annular elastic body such as rubber formed in an annular shape about the central axis, and seals (airtightly closes) between the main body housing 2 and the fan motor unit 6. Specifically, the seal member 30 abuts on the opening edge (inner edge of the flange portion 2i) of the main body intake port 2d and the outer peripheral surface of the front end portion of the unit case 6e (outer peripheral surface around the unit intake port 6d). This seals the space between the main body intake port 2d and the unit intake port 6d so that air cannot pass through. This prevents the airflow from circulating inside and outside the fan motor unit 6. As a result, the suction efficiency from the dust case intake port 3a is enhanced.

When the operator operates the switch on the operation panel 5 to drive the fan motor unit 6, the fan 6b rotates due to the rotation of the motor 6a. The airflow generated by the fan 6b is taken into the dust case 3 from the dust case intake port 3a. The airflow passes through the filter device 40 and is taken into the fan motor unit 6 from the main body intake port 2d and the unit intake port 6d. The airflow is guided by the unit case 6e and is exhausted rearward from the inside of the fan motor unit 6. The airflow is finally exhausted from the exhaust port 2e to the outside of the main body housing 2. Dust that has entered with the air flow from the dust case intake port 3a is collected by the filter device 40 and collected inside the dust case 3 and outside the filter device 40.

Hereinafter, the filter device 40 attached to the working machine 1 will be described. The filter device 40 has a filter 41 and a holder 42. The filter 41 has a breathable bag shape and is held in the holder 42 and is sewn with a thread or the like. The holder 42 is made of a material that is harder than the filter 41. The holder 42 is, for example, a resin molded body. The holder 42 supports the filter 41 from the inside and suppresses the deformation of the filter 41 inward. As shown in FIGS. 4 to 10, the holder 42 is tapered with the first cylinder portion 43, the first pillar portion 44, the second pillar portion 45, the bridge portions 46 to 48, the second cylinder portion 49, and the like. It has a section 50 and a bridge section 51.

The first tubular portion 43 is a cylindrical portion whose axial direction is parallel to the front-rear direction. The axis of the first cylinder portion 43 is the axis of the holder 42 and coincides with the central axis. Hereinafter, the axis of the holder 42 is simply referred to as “axis”, and the direction intersecting with the axis and perpendicular to the axis is defined as “diameter”. A seal member 53 is provided at the rear end of the first cylinder 43.

The seal member 53 is an annular elastic body such as rubber formed in an annular shape centered on the axis, and is in contact with the front surface around the main body intake port 2d of the main body housing 2 and is in contact with the rear end portion of the holder 42. Seal between the front surface of the main body housing 2 (close airtightly). As a result, it is suppressed that the air does not pass through the filter 41 and goes to the main body intake port 2d.

Two engaging portions 43a are provided at the rear end portion of the first cylinder portion 43. The engaging portion 43a is a portion that protrudes radially outward from the first tubular portion 43. The two engaging portions 43a are located at positions different from each other by 180 degrees around the axis. A protrusion 43b is provided at the center of the engaging portion 43a in the axial direction. The protrusion 43b projects radially outward from the engagement portion 43a. The engaging portion 43a is located in the groove portion 2k (FIG. 1) of the main body housing 2. The protrusion 43b fits into the recess 2j (FIG. 3) provided in the groove 2k. The fitting of the protrusion 43b and the recess 2j prevents the holder 42 from rotating with respect to the main body housing 2.

The first pillar portion 44 and the second pillar portion 45 are formed so as to extend forward (one side in the axial direction) from the first cylinder portion 43, respectively, and come into contact with the filter 41 to suppress deformation of the filter 41. .. Two pillars 44 and two pillars 45 are provided, and the first pillars 44 and the second pillars 45 are arranged alternately around the axis, preferably at equal angular intervals. The first pillar portion 44 and the second pillar portion 45 are parallel to the axial direction.

The first pillar portion 44 has a base portion 44a and a rib 44b. The base portion 44a is a planar portion perpendicular to the radial direction. The thickness of the base portion 44a is, for example, 1.5 mm. The width of the base 44a is, for example, 5 mm. The rib 44b is erected radially from the base 44a. Specifically, the rib 44b rises radially inward from the widthwise central portion of the radial inner surface of the base 44a. The thickness of the rib 44b is, for example, 2 mm. The height of the rib 44b in the radial direction is preferably 2 mm or more and 6 mm or less at the highest portion, and is, for example, 4.3 mm. As shown in FIG. 6, the radial height of the rib 44b is, at least in part, larger than the radial thickness of the base 44a. In the illustrated example, the rib 44b has a height in the radial direction larger than the thickness in the radial direction of the base portion 44a except for a range of about 1/4 of the front-rear length of the first pillar portion 44 from the rear end. The radial height of the ribs 44b may be higher than the width of the base 44a, at least in part.

The rib 44b is provided so as to extend from the rear end portion of the first pillar portion 44 to the inner surface of the second cylinder portion 49 and the tapered portion 50 in the front-rear direction. As shown in FIG. 6, in the range where the position in the axial direction overlaps with the first pillar portion 44, the height in the radial direction of the rib 44b differs depending on the position in the axial direction. Specifically, the rib 44b has a higher radial height toward the front in a range of a predetermined length from the rear end. This is to prevent the rib 44b from interfering with the bone portion 62 of the frame 60 in the process of attaching the filter device 40 to the main body housing 2, as shown in FIG.

The second pillar portion 45 has a base portion 45a and a ridge portion 45b. The base portion 45a is a planar portion perpendicular to the radial direction. The radial thickness of the base 45a is the same as the radial thickness of the base 44a. The ridge portion 45b projects radially from the base portion 45a. Specifically, the ridge portion 45b projects radially inward from the widthwise central portion of the radial inner surface of the base portion 45a. The radial height of the ridge 45b is lower than the radial height of the rib 44b and smaller than the radial thickness of the base 45a as shown in FIG. The ridge portion 45b is provided so as to extend from the rear end portion of the second pillar portion 45 to the inner surface of the second cylinder portion 49 and the tapered portion 50 in the front-rear direction. The height of the ridge portion 45b is, for example, 1 mm.

The bridge portions 46 to 48 extend in the axial direction and pass between the first pillar portion 44 and the second pillar portion 45, respectively. The bridge portion 46 is axially passed between one front end portion and the other rear end portion of the first pillar portion 44 facing each other via the central portion 45c in the axial direction of the second pillar portion 45. Go around. The bridge portion 47 has an axis so as to pass between the rear end portion of one of the first pillar portions 44 facing each other and the front end portion of the other via the central portion 45c in the axial direction of the second pillar portion 45. Go around. The bridge portions 46 and 47 intersect with each other and intersect with the second pillar portion 45 at the central portion 45c in the axial direction of the second pillar portion 45. The bridge portion 48 goes around the axis so as to pass between the central portion 44c in the axial direction of the first pillar portion 44 and the central portion 45c in the axial direction of the second pillar portion 45. The bridge portion 48 intersects the bridge portions 46, 47 and the second pillar portion 45 at the central portion 45c in the axial direction of the second pillar portion 45. The number of bridge portions connected to the central portion 45c in the axial direction of the second pillar portion 45 is three (bridge portions 46 to 48). The number of bridge portions connected to the central portion 44c in the axial direction of the first pillar portion 44 is one (bridge portion 48), and the number of bridge portions connected to the central portion 45c in the axial direction of the second pillar portion 45. Less than.

The second tubular portion 49 is a cylindrical portion centered on the axis. The second cylinder portion 49 connects the front end portions of the first pillar portion 44 and the second pillar portion 45 to each other. The tapered portion 50 extends forward from the front end portion of the second tubular portion 49. The tapered portion 50 has a truncated cone side surface shape in which the diameter becomes smaller toward the front. An opening 50a is provided at the front end of the tapered portion 50. The opening 50a is a circular through hole centered in the axial direction. Three bridge portions 51 are provided at intervals of 120 degrees so as to divide the opening 50a around the axis, and here to divide the opening 50a into three equally. The bridge portion 51 has a flat plate shape parallel to the axial direction.

A frame 60 is provided inside the filter device 40. The frame 60 is attached to the main body housing 2. As shown in FIG. 10, the frame 60 has a first annular portion 61, a plurality of bone portions 62, and a second annular portion 63. The first annular portion 61 forms the rear end portion of the frame 60. The second annular portion 63 forms the front end portion of the frame 60. The plurality of bone portions 62 pass between the first annular portion 61 and the second annular portion 63. Each of the plurality of bone portions 62 is inclined and extends in the axial direction, and has a shape in which the outer dimensions gradually decrease toward the front side (one side in the axial direction) as a whole.

The filter device 40 is attached to the main body housing 2 by being rotated relative to the axis. In the process of relative rotation, the engaging portion 43a of the holder 42 enters the groove portion 2k of the main body housing 2, and the protruding portion 43b of the engaging portion 43a fits into the recess 2j in the groove portion 2k. FIG. 10 shows the holder 42 and the frame 60 in a state where the rib 44b of the holder 42 and the bone portion 62 of the frame 60 are at the same position in the axial direction in the process of rotating the holder 42 with respect to the main body housing 2. It is a cross-sectional view. As shown in FIG. 10, since the rib 44b is inclined so as to avoid the bone portion 62, the bone portion 62 is located on the inner peripheral side of the rib portion 44b in the radial direction, and is a filter for the main body housing 2. In the process of attaching the device 40, a gap of 1 mm or more is provided between the rib 44b and the bone portion 62 so that they do not interfere with each other. Note that FIG. 10 shows a state in which the holder 42 is in the process of rotating with respect to the main body housing 2. When the holder 42 is rotated to the end with respect to the main body housing 2, the state shown in FIG. 1 is obtained, and the axes of the rib 44b and the bone portion 62 are aligned. The position in the turning direction is different. However, in a state where the holder 42 is rotated to the end with respect to the main body housing 2, the positions of the rib 44b and the bone portion 62 in the axial direction may be the same as shown in FIG.

According to this embodiment, the following effects can be obtained.

(1) Since the first pillar portion 44 of the holder 42 has the rib 44b and the height of the rib 44b is larger than the thickness of the base portion 44a at least in part, the structure of the first pillar portion 44 is strengthened and the first pillar portion 44 is first. The inward deformation of the pillar portion 44 is suppressed. As a result, it is suppressed that the first cylinder portion 43 is deformed so as to be uneven in the axial direction due to the inward deformation of the first pillar portion 44, and a gap is formed between the seal member 53 and the front surface of the main body housing 2. .. Therefore, the generation of an air flow toward the main body intake port 2d without passing through the filter device 40 is suppressed, and the ingress of dust into the main body housing 2 is suppressed.

(2) The number of bridges connected to the central portion 44c in the axial direction of the first pillar portion 44 is one (bridge portion 48), and the bridge portion connected to the central portion 45c in the axial direction of the second pillar portion 45. It is less than the number of (three of bridges 46 to 48). In this respect, the first pillar portion 44 is more easily deformed than the second pillar portion 45. However, the structure of the first pillar portion 44 is strengthened by having the ribs 44b as described above, and the deformation is suppressed. On the other hand, the second pillar portion 45 is less likely to be deformed than the first pillar portion 44 in that the number of bridge portions connected to the central portion 45c is large. Therefore, even if the height of the ridge portion 45b of the second pillar portion 45 is lower than that of the rib 44b in the radial direction, the inward deformation of the second pillar portion 45 is suppressed.

(3) As described above, since the holder 42 has a structure in which deformation is suppressed, the filter 41 will deform inward even if the suction force of the working machine 1 increases due to the performance improvement of the fan motor unit 6 and the battery pack 4. Can withstand the force of In other words, by strengthening the structure of the holder 42, it becomes possible to cope with a larger suction force, and the performance of the working machine 1 can be improved.

(4) The rib 44b has an inclined portion whose height increases in the radial direction toward the front. Therefore, when the filter device 40 is attached to the main body housing 2, the rib 44b is prevented from interfering with the bone portion 62 of the frame 60. Therefore, even when the working machine 1 to which the filter device 40 is attached has the frame 60, the filter device 40 can be attached without removing the frame 60, which is highly convenient.

(Embodiment 2)
FIG. 11 is a side sectional view of the holder 42A according to the second embodiment of the present invention. The holder 42A of the present embodiment is obtained by removing the inclined portion of the rib 44b of the holder 42 of the first embodiment whose height gradually changes in the radial direction. That is, in the holder 42A, the rib 44bA of the first pillar portion 44A is provided so as to be limited to the front of a predetermined position in the axial direction of the first pillar portion 44A. In addition, a rib having a height lower than that of the rib 44bA may be connected and extended in a stepped manner behind the rib 44bA. Other points of the present embodiment are the same as those of the first embodiment.

(Embodiment 3)
FIG. 12 is a side sectional view of the holder 42B according to the third embodiment of the present invention. FIG. 13 is a side sectional view of the holder 42B when it is deformed. The holder 42 of the first embodiment is curved so that the first cylinder portion 43, the first pillar portion 44 and the second pillar portion 45, and the second cylinder portion 49 are radially outward so as to have a barrel shape as a whole. What is made is the basic structure of the holder 42B. That is, the holder 42B has a first cylinder portion 43B, a first pillar portion 44B, a second pillar portion 45B, and a second cylinder portion 49B curved outward in the radial direction so as to have a barrel shape as a whole. .. The first pillar portion 44B has a rib 44bB. The second pillar portion 45B has a base portion 45aB and a ridge portion 45bB. The bridge portions 46 to 48 of the holder 42 are replaced with the bridge portions 48A and 48B in the holder 42B. The bridge portions 48A and 48B form a grid shape curved outward in the radial direction between the first pillar portion 44B and the second pillar portion 45B. Other points of the present embodiment are the same as those of the first embodiment.

According to the present embodiment, by forming the side surface of the holder 42B into a barrel shape that is convex outward, further increase in strength is realized. Further, even if the side surface of the holder 42B is deformed inward, the deformation acts to press the rear end portion of the first cylinder portion 43B, that is, the seal member 53 against the front surface side of the main body housing 2, so that the first cylinder The airtightness between the portion 43B and the front surface of the main body housing 2 is maintained.

Although the present invention has been described above by taking the embodiment as an example, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, a modification example will be touched upon.

The rib 44b may be changed to a shape having an inclined portion so that the height becomes higher toward the rear. Such a modification is effective when the plurality of bone portions 62 of the frame 60 have a shape in which the outer dimensions gradually decrease toward the rear side as a whole. The second pillar portion 45 may be provided with ribs in the same manner as the ribs 44b provided on the first pillar portion 44. Any or all of the bridge portions 46 to 48 may be omitted. The first pillar portion 44 and the second pillar portion 45 may be one by one, or may be three or more. The fan motor unit 6 may be replaced with a non-unitized motor and a dust collecting fan. The frame 60 may be omitted.

1 Work equipment (cleaner), 2 Main body housing, 2a housing part, 2b handle part, 2c battery pack mounting part, 2d main body intake port, 2e exhaust port, 2f left housing, 2g right housing, 2h tubular part, 2i flange part , 2j recess, 2k groove, 3 dust case, 3a dust case intake port, 4 battery pack, 5 operation panel (switch part), 6 fan motor unit, 6a motor (electric motor), 6b fan, 6c rotating shaft (drive shaft) ), 6d unit intake port, 8 control board, 30 seal member, 40 filter device, 41 filter, 42, 42A, 42B holder, 43, 43B first cylinder,
43a engaging part, 43b protrusion, 44, 44A, 44B first pillar part, 44a base,
44b, 44bA rib (reinforcing rib), 44c central part, 45, 45B second pillar part,
45a, 45aB base, 45b, 45bB ridge, 45c center, 46-48, 48A, 48B bridge, 49, 49B second cylinder, 50 taper, 50a opening, 51 bridge, 53 seal member, 60 Frame, 61 1st ring, 62 bone, 63 2nd ring.

Claims (9)

A filter device that is attached to a work machine and collects dust from the air flow.
Breathable bag-shaped filter and
With a holder that supports the filter,
The holder is
A cylinder extending in the axial direction and
It has a plurality of pillar portions that are formed so as to extend from the tubular portion to one side in the axial direction and that abut with the filter to suppress deformation of the filter.
At least one of the plurality of pillars has a base and ribs erected from the base in the radial direction about the axis.
A filter device in which the height of the rib in the radial direction is larger than the thickness of the base. The filter device according to claim 1, wherein the height of the rib in the radial direction differs depending on the position in the axial direction. The filter device according to claim 2, wherein the height of the rib in the radial direction is higher on one side in the axial direction than on the other side in the axial direction. The plurality of pillars are any of claims 1 to 3, wherein the plurality of pillars include a first pillar provided with the rib and a second pillar provided with a ridge having a height lower than that of the rib. The filter device according to one item. It has a plurality of bridges extending in a direction intersecting the axial direction and passing between the plurality of pillars.
The number of the bridge portions connected to the central portion of the first pillar portion in the axial direction is smaller than the number of the bridge portions connected to the central portion of the second pillar portion in the axial direction. 4. The filter device according to 4. The filter device according to any one of claims 1 to 5, wherein the height of the rib in the radial direction is higher than the width of the base at least in part. A motor with a drive shaft and
A fan that rotates by the driving force of the drive shaft,
A main body housing that houses the motor and the fan inside,
An intake port provided in the main body housing and allowing an air flow generated by the fan to flow into the main body housing.
A working machine comprising the filter device according to any one of claims 1 to 6, which is attached to the main body housing so that the cylinder portion abuts around the intake port. It has a frame provided inside the filter device and has a frame.
The seventh aspect of the present invention, wherein the frame has a plurality of bone portions inclined with respect to the axial direction, and has a shape in which the outer dimensions gradually decrease toward the one side in the axial direction. Working machine. The filter device is attached to the main body housing by being rotated relative to the axis.
The working machine according to claim 8, wherein the bone portion of the frame is located on the inner peripheral side of the rib of the holder in the radial direction about the axis.

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