Working machine

Abstract

To provide a highly convenient working machine in which clogging of a filter is suppressed.SOLUTION: In one embodiment, the working machine includes a filter device 30 covering an exhaust port of the dust collecting chamber. The filter device 30 includes a bag-shaped filter 31 capable of collecting dust contained in the passing air flow, and a holder 32 located inside the filter 31 and supporting the filter 31. The holder 32 has a cylindrical base portion 40, a columnar support portion 50 extending in the direction of the axis X of the base portion 40, and an annular support portion 60 extending in the circumferential direction around the axis X. One longitudinal end of the columnar support portion 50 is connected to the base portion 40. The annular support portion 60 is located outside the columnar support portion 50 in the radial direction around the axis X.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a work machine. [Background technology]

[0002] Patent Document 1 discloses a dust collecting device (cleaner) that is an example of a work machine. The cleaner described in Patent Document 1 includes a filter device that collects dust, and the filter device includes a bag-shaped filter and a filter housing that supports the filter. The filter housing includes multiple arms that support the filter from the inside. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-68726 Summary of the Invention [Problem to be solved by the invention]

[0004] Filter devices are required to prevent clogging of the filter. However, if the arms of the filter housing described in Patent Document 1 are thinned to reduce the contact area between the filter and the filter housing in order to meet this requirement, the strength of the filter housing may be reduced. In other words, there is a risk that the filter may not be supported sufficiently. [Means for solving the problem]

[0005] In one embodiment, a work machine includes a motor, a fan that rotates by receiving driving force from the motor, a case that supports the motor and the fan and defines a dust collection chamber therein, and a filter device disposed inside the case and covering an exhaust port of the dust collection chamber. The filter device includes a bag-shaped filter that can capture dust contained in a passing airflow, and a holder that is attached to the case and is positioned inside the filter to support the filter. The holder includes a cylindrical base, a first support portion that extends in the direction of the axis of the base, and a second support portion that extends in a circumferential direction about the axis. One longitudinal end of the first support portion is connected to the base, and the second support portion is positioned outside the first support portion in a radial direction about the axis. [Effects of the Invention]

[0006] According to the present invention, a highly convenient work machine in which clogging of the filter is suppressed can be realized. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a side view showing the appearance of a cleaner according to a first embodiment. FIG. [Figure 2] 1 is a cross-sectional view showing the structure of a cleaner according to a first embodiment. [Figure 3] 1 is an exploded perspective view of a filter device according to a first embodiment. FIG. [Figure 4] FIG. 4 is a plan view of the holder shown in FIG. 3. [Figure 5] FIG. 4 is a side view of the holder shown in FIG. 3. [Figure 6] FIG. 3 is a perspective view showing the inside of the dust case shown in FIGS. [Figure 7] 2 is a side view showing a procedure for attaching the dust case shown in FIG. 1 to the main case shown in FIG. [Figure 8] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Figure 9] FIG. 8 is a cross-sectional view taken along line BB in FIG. [Figure 10]FIG. 6 is a cross-sectional view showing the structure of a cleaner according to a second embodiment. [Figure 11] FIG. 10 is an exploded perspective view of a filter device according to a second embodiment. [Figure 12] 11 is a perspective view showing the inside of the dust case shown in FIG. 10. FIG. [Figure 13] FIG. 10 is a cross-sectional view showing the structure of a cleaner according to a third embodiment. [Figure 14] FIG. 10 is a perspective view showing a modified example of a holder included in the filter device. [Figure 15] FIG. 10 is a perspective view showing another modified example of the holder of the filter device. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all drawings used to describe the embodiments, the same or substantially the same configurations and elements will be designated by the same reference numerals. Furthermore, as a general rule, once a configuration or element has been described, it will not be described again.

[0009] (First embodiment) The work machine according to this embodiment is a cleaner suitable for dust collection work, and more particularly, the work machine according to this embodiment is a portable (cordless) cleaner.

[0010] <Cleaner Overview> Fig. 1 is a side view showing the appearance of a cleaner 1A according to this embodiment. Fig. 2 is a cross-sectional view showing the structure of the cleaner 1A according to this embodiment. The cleaner 1A has a case 2 that forms an outer shell. The case 2 is composed of a main case 3 and a dust case 4.

[0011] The main case 3 and the dust case 4 have a two-piece structure. More specifically, the main case 3 is made up of two resin members that are butted together and fixed. Similarly, the dust case 4 is made up of two resin members that are butted together and fixed.

[0012] The main case 3 houses a fan unit 10 including a motor 11 and a fan 12. The main case 3 also has a handle 13 that is gripped by an operator. Furthermore, a battery pack 14 is detachably attached to the lower rear part of the main case 3.

[0013] The illustrated battery pack 14 is a lithium-ion battery. However, the battery pack 14 is not limited to a lithium-ion battery. When an operation panel 15 provided on the handle portion 13 is operated, power is supplied from the battery pack 14 to the motor 11 under the control of the controller 16. Then, the fan 12 receives the driving force output from the motor 11 and rotates.

[0014] The dust case 4 is detachably attached to one end (front side) of the main case 3. The dust case 4 attached to the main case 3 defines a dust collection chamber 20 therein. From another perspective, when the dust case 4 is attached to the main case 3, the dust collection chamber 20 is formed in front of the main case 3.

[0015] The dust case 4 has an intake port 21 which is the entrance to the dust collection chamber 20, and an exhaust port 22 which is the exit of the dust collection chamber 20. The exhaust port 22 is connected to the main case 3. More specifically, the exhaust port 22 is connected to the fan unit 10.

[0016] Therefore, when fan 12 rotates, air flows into dust collection chamber 20 through intake port 21. The air that flows into dust collection chamber 20 passes through filter 31, which will be described later, and then flows out of dust collection chamber 20 through exhaust port 22. At this time, dust contained in the air that has flowed into dust collection chamber 20 is captured by filter 31.

[0017] That is, the air from which dust has been removed flows out of the dust case 4 (dust collection chamber 20). The air that flows out of the dust case 4 flows into the main case 3. The air that flows into the main case 3 passes through the fan unit 10, and then flows out of the main case 3 through the exhaust hole 17.

[0018] <Filter device> The cleaner 1A includes a filter device 30 disposed inside the case 2. The filter device 30 is disposed inside the dust case 4 (inside the dust collection chamber 20) and covers the exhaust port 22.

[0019] More specifically, the filter device 30 is attached to the front surface of the main case 3. When the dust case 4 is attached to the main case 3 to which the filter device 30 is attached, the dust collection chamber 20 is defined, the filter device 30 is disposed in the defined dust collection chamber 20, and the exhaust port 22 is covered by the filter device 30.

[0020] Fig. 3 is an exploded perspective view of filter device 30. Fig. 4 is a plan view of holder 32, and Fig. 5 is a side view of holder 32. Filter device 30 includes a bag-shaped filter 31 and holder 32 located inside filter 31.

[0021] <filter> The filter 31 is breathable. More specifically, the filter 31 is formed in a bag shape from a breathable material such as a nonwoven fabric or a filter cloth. In other words, the filter 31 has a cylindrical shape with one end open.

[0022] The filter 31 is capable of capturing dust contained in the airflow passing through the filter 31. Air that has flowed into the dust collection chamber 20 shown in Fig. 2 flows from the outside to the inside of the filter 31. At this time, dust contained in the airflow passing through the filter 31 is captured by the filter 31. In short, the filter 31 allows air to pass through but does not allow dust to pass through.

[0023] <Holder> 3 to 5 again. Holder 32 is made of synthetic resin. Holder 32 is disposed inside filter 31 and supports filter 31 from the inside. From another perspective, holder 32 is a resin frame that maintains the shape of filter 31.

[0024] The holder 32 has an integrally molded base portion 40, a first support portion 50, and a second support portion 60. The base portion 40 is tubular. More specifically, the base portion 40 is cylindrical.

[0025] The first support portion 50 extends in the direction of the axis X of the base portion 40. On the other hand, the second support portion 60 extends in the circumferential direction centered on the axis X of the base portion 40. More specifically, the second support portion 60 extends in the circumferential direction of a circle centered on a point on the axis X.

[0026] In the following description, unless otherwise specified, the "axial direction" refers to the direction of the axis X of the base 40. Furthermore, the "circumferential direction" refers to the circumferential direction of a circle centered on a point on the axis X. Furthermore, the "radial direction" refers to the radial direction of a circle centered on a point on the axis X.

[0027] <Base> The filter 31 is fixed to the base 40 of the holder 32. As shown in Fig. 3 , the filter 31 is placed over the holder 32 so that the periphery 33 of the opening overlaps the peripheral wall 41 of the base 40. Thereafter, the periphery 33 of the opening that overlaps the peripheral wall 41 is sewn to the peripheral wall 41.

[0028] However, the method of fixing the filter 31 and the holder 32 is not limited to suturing. For example, the periphery 33 of the opening of the filter 31 may be glued or welded to the peripheral wall 41 of the base 40.

[0029] Here, the side surface area of ​​the filter 31 excluding the periphery 33 is about 15,000 mm 2 In the following description, the side surface of the filter 31 excluding the peripheral edge 33 may be referred to as the "effective side surface" to distinguish it from other portions.

[0030] 3, a dot pattern is applied to the effective side surface. However, the dot pattern is applied to clarify the effective side surface, and the dot pattern is not applied to the side surface of the actual filter 31.

[0031] Two protrusions 42a, 42b are provided at the rear end (lower end) of the base 40. Each of the protrusions 42a, 42b is a convex portion that protrudes in the radial direction and extends in the circumferential direction. The protrusions 42a and 42b are provided at positions that are 180 degrees apart in the circumferential direction.

[0032] 2, the protrusions 42a, 42b engage with grooves 18a, 18b provided on the front surface of the main case 3. More specifically, the protrusions 42a, 42b are inserted into the grooves 18a, 18b by a rotational operation. As a result, the filter device 30 is attached to the front surface of the main case 3.

[0033] Thereafter, when the dust case 4 is attached to the main case 3, the filter device 30 is disposed in the dust collection chamber 20, and the exhaust port 22 is covered by the filter device 30, as described above.

[0034] <1st support part> The first support portion 50 is columnar and extends from the base portion 40 in the axial direction. Therefore, in the following description, the first support portion 50 may be referred to as the "columnar support portion 50." There is no particular limit to the number of columnar support portions 50, but in this embodiment, four columnar support portions 50 are provided at intervals (a) along the circumferential direction. Note that the interval (a) in this embodiment shown in FIG. 4 is approximately 23 mm. However, in order to sufficiently reduce the contact area between the filter 31 and the holder 32 and prevent the filter 31 from getting between the columnar support portions 50 and losing contact with the dust removal blade 70 (described later), it is preferable that the interval (a) be 5 mm or more and 40 mm or less.

[0035] One longitudinal end (rear end / lower end) of each of the columnar supports 50 is connected to the base 40. More specifically, one longitudinal end (rear end / lower end) of each of the columnar supports 50 is connected to the inner circumferential surface of the peripheral wall 41. From another perspective, each of the columnar supports 50 is located inside the base 40 in the radial direction.

[0036] <Second support part> The second support portion 60 is annular and extends in the circumferential direction. Therefore, in the following description, the second support portion 60 may be referred to as the "annular support portion 60." There is no particular limit to the number of annular support portions 60, but in this embodiment, three annular support portions 60 are provided at intervals (b) along the axial direction. Note that the interval (b) in this embodiment shown in FIG. 5 is approximately 32 mm. However, in order to sufficiently reduce the contact area between the filter 31 and the holder 32 and prevent the filter 31 from getting caught between the columnar support portions 50 and losing contact with the dust removal blade 70 (described later), it is preferable that the interval (a) be 5 mm or more and 40 mm or less.

[0037] Each annular support portion 60 is located radially outward of the columnar support portion 50. Therefore, the filter 31 placed on the holder 32 is supported by the annular support portions 60, not by the columnar support portions 50. More specifically, the filter 31 is supported from the inside by the outer peripheral surfaces 60a of the three annular support portions 60 that face the inner peripheral surface 31b of the filter 31 (see FIG. 2).

[0038] Here, the width dimension along the radial direction of each annular support part 60 is greater than the thickness dimension along the axial direction. That is, each annular support part 60 has a flat plate shape with a thickness (T) shown in Fig. 5 that is thinner than the width (W) shown in Fig. 4. From another perspective, the outer peripheral surface 60a of each annular support part 60 that contacts the inner peripheral surface 31b of the filter 31 to support the filter 31 is a narrow, band-like surface with an extremely small area.

[0039] In this embodiment, the thickness (T) is 6.4 times the width (W), but in order to sufficiently reduce the contact area between the filter 31 and the holder 32 while ensuring that the annular support portion 60 has sufficient strength to prevent the annular support portion 60 from deforming inward due to the force that the filter 31 receives from the air flow, it is preferable that the thickness (T) be 1.5 to 20 times the width (W).

[0040] Specifically, the total area of ​​the outer peripheral surfaces 60a of the three annular support portions 60 in this embodiment is approximately 960 mm 2 On the other hand, the effective side area of ​​the filter 31 is about 15,000 mm 2 In other words, the area of ​​the portion supported by the annular support portion 60 is less than 10.0% (approximately 6.4%) of the total area of ​​the effective side surface.

[0041] From another perspective, the area of ​​the portion that may be blocked by the outer peripheral surface 60a of the annular support portion 60 is less than 10% of the total area of ​​the effective side surface.

[0042] On the other hand, each annular support portion 60 has the above-described flat plate shape and is supported from the radially inner side by a plurality of columnar support portions 50, so it is not easily deformed. In particular, the annular support portion 60 is not easily deformed radially inward. In other words, the annular support portion 60 is not easily crushed.

[0043] As described above, in this embodiment, the combination of two support parts (first support part 50 and second support part 60) located at different radial positions reduces the contact area between filter 31 and holder 32 and ensures the strength of holder 32. In other words, the opening area of ​​filter 31 is increased without reducing the strength of holder 32.

[0044] <1st area, 2nd area> 3 and 4, the outer circumferential surface 60a of each annular support portion 60 includes a first region 61 having a relatively high height and a second region 62 having a relatively low height. Furthermore, the first region 61 and the second region 62 are alternately provided along the circumferential direction of the annular support portion 60.

[0045] From another perspective, the first region 61 is located between the two second regions 62 and is a region that protrudes radially outward from the two second regions 62. The second region 62 is located between the two first regions 61 and is a region that is recessed radially inward from the two first regions 61.

[0046] As described above, the outer peripheral surface 60a of the annular support part 60 faces the inner peripheral surface 31b of the filter 31. However, since the first regions 61 and second regions 62 having different heights are alternately present on the outer peripheral surface 60a as described above, the distance (opposing distance) between the outer peripheral surface 60a of the annular support part 60 and the inner peripheral surface 31b of the filter 31 is not constant around the entire circumference.

[0047] More specifically, at least when no wind pressure is acting on the filter 31, the second region 62 is spaced radially inward from the inner circumferential surface 31b of the filter 31 more than the first region 61. In other words, when the fan 12 is not rotating, the second region 62 is located radially inward from the inner circumferential surface 31b of the filter 31 more than the first region 61.

[0048] From another perspective, the second regions 62 are notches provided on the outer peripheral surface 60a of the annular support part 60. In other words, on the outer peripheral surface 60a of each annular support part 60, there are multiple notches lined up in the circumferential direction.

[0049] <Dust removal material> 6 is a perspective view showing the inside of the dust case 4. A dust removal blade 70, which is an example of a dust removal member, is provided inside the dust case 4. More specifically, three dust removal blades 70a, 70b, and 70c are provided at equal intervals inside the dust case 4.

[0050] Each dust removal blade 70 is a rubber or plastic plate extending in the longitudinal direction of the dust case 4, and is integrated with a blade holder 71 extending in the same direction. The bottom surface of the blade holder 71 is provided with a groove into which a protrusion provided on the inner surface of the dust case 4 can be fitted.

[0051] When the protrusion of the dust case 4 is fitted into the groove of the blade holder 71 , the blade holder 71 is fixed to the dust case 4 , and as a result, the dust removal blade 70 is disposed inside the dust case 4 .

[0052] 7 is a side view showing the procedure for attaching the dust case 4 to the main case 3. When attaching the dust case 4 to the main case 3, the rear surface of the dust case 4 is brought close to the front surface of the main case 3 and the two are butted together.

[0053] Next, the dust case 4 is rotated circumferentially by a predetermined angle relative to the main case 3. This causes an engagement groove 6 (Fig. 2) provided on the front surface of the main case 3 to engage with an engagement protrusion 7 (Fig. 6) provided on the rear surface of the dust case 4.

[0054] In this embodiment, when the dust case 4 shown in Fig. 7 is abutted against the main case 3 and then rotated approximately 120 degrees in one circumferential direction, the engagement grooves 6 and the engagement protrusions 7 engage with each other, and the dust case 4 is fixed to the main case 3. On the other hand, when the dust case 4 shown in Fig. 1 is rotated approximately 120 degrees in the other circumferential direction, the engagement between the engagement grooves 6 and the engagement protrusions 7 is released, and the fixation between the dust case 4 and the main case 3 is also released.

[0055] Fig. 8 is a cross-sectional view taken along line AA in Fig. 1. From another perspective, Fig. 8 shows the state inside the dust collection chamber 20 when the dust case 4 is attached to the main case 3.

[0056] When the dust case 4 is attached to the main case 3, the three dust removal blades 70 provided inside the dust case 4 are arranged around the filter device 30 in the dust collection chamber 20. More specifically, the dust removal blades 70a, 70b, and 70c are arranged at 120-degree intervals around the filter 31. Furthermore, the tips of the respective dust removal blades 70 are in contact with the outer peripheral surface 31a of the filter 31.

[0057] 8 is rotated, the dust removal blade 70 scrapes off the dust adhering to the outer peripheral surface 31a of the filter 31. In other words, the filter 31 is cleaned. At this time, if the rotation angle of the dust case 4 is limited to less than ±120 degrees, the dust case 4 will not come off the main case 3.

[0058] On the other hand, the dust removal blade 70 provides resistance when attaching the dust case 4 to the main case 3 or when removing the dust case 4 from the main case 3. For example, when attaching the dust case 4 to the main case 3, the dust case 4 is brought close to the front surface of the main case 3 and placed over the filter device 30 protruding from the front surface of the main case 3.

[0059] At this time, there is a risk that smooth movement of the dust case 4 may be hindered due to contact resistance between the dust removal blade 70 and the filter 31. Therefore, in this embodiment, in order to improve the ease of attachment and detachment of the dust case 4, a second region 62 is provided on the outer circumferential surface 60a of the annular support portion 60 of the holder 32.

[0060] At least when the fan 12 is not rotating, the second region 62 is radially farther from the filter 31 than the first region 61. Therefore, by passing the dust removal blade 70 above (radially outward from) the second region 62 rather than above (radially outward from) the first region 61, the contact resistance between the dust removal blade 70 and the filter 31 is reduced. In other words, the dust case 4 can be smoothly brought close to the main case 3. In other words, the dust case 4 can be smoothly placed over the filter device 30.

[0061] Fig. 9 is a cross-sectional view taken along line BB in Fig. 7. From another perspective, Fig. 9 shows the state inside the dust collection chamber 20 while the dust case 4 is being placed over the filter device 30.

[0062] 9, when the dust case 4 is placed over the filter device 30, the dust removal blade 70 moves in the axial direction above (radially outward from) the second region 62 of the annular support part 60. From another perspective, the positional relationship between the dust removal blade 70 and the second region 62 of the annular support part 60 is adjusted in advance so that the positions of the dust removal blade 70 and the second region 62 of the annular support part 60 coincide with each other when the rotation angle of the dust case 4 relative to the main case 3 is set to the angle shown in FIG.

[0063] For the same reasons as above, smooth movement of the dust case 4 is ensured when removing the dust case 4 from the main case 3. Also, the main case 3 and the dust case 4 are provided with marks that serve as guides for adjusting the rotation angle of the dust case 4 relative to the main case 3 to the angle shown in Fig. 7.

[0064] (Second embodiment) The work machine according to this embodiment is a cleaner having the same basic configuration as the cleaner 1A according to the first embodiment. Therefore, a description of the configuration that is the same as or substantially the same as the cleaner 1A according to the first embodiment will be omitted, and the main differences will be described.

[0065] Fig. 10 is a cross-sectional view showing the structure of a cleaner 1B according to this embodiment. Fig. 11 is an exploded perspective view of a filter device 130 included in the cleaner 1B. Fig. 12 is a perspective view showing the inside of a dust case 104 of the cleaner 1B.

[0066] <Filter device> As shown in FIGS. 10 and 11, the filter device 130 included in the cleaner 1B has a bag-shaped filter 131 and a holder 132 that supports the filter 131 from the inside, similar to the filter device 30 included in the cleaner 1A.

[0067] Furthermore, similar to the holder 32 of the filter device 30, the holder 132 of the filter device 130 has a plurality of first support portions 150 and second support portions 160. However, the holder 132 differs from the holder 32 mainly in the following points.

[0068] The second support portion 160 of the holder 132 includes a plurality of small diameter annular support portions 165 and a plurality of large diameter annular support portions 166. The small diameter annular support portions 165 and the large diameter annular support portions 166 will be described later.

[0069] <Dust removal material> 12, dust removal blades 170, which are another example of dust removal members, are provided inside the dust case 104. More specifically, three blade assemblies 175, each consisting of a plurality of dust removal blades 170 arranged at predetermined intervals along the axial direction, are provided inside the dust case 104.

[0070] From another perspective, each blade assembly 175 is made up of a plurality of dust removal blades 170 that are independent of one another. Each dust removal blade 170 is smaller than the dust removal blade 70 and has greater flexibility and pliability than the dust removal blade 70. As a result, the blade assembly 175 as a whole has excellent ability to follow deformations of the filter 131.

[0071] Each blade assembly 175 includes five (five) dust removal blades 170. The five dust removal blades 170 belonging to each blade assembly 175 are integrated by a blade holder 171.

[0072] Moreover, the five dust removal blades 170 belonging to each blade assembly 175 have different overall lengths. From another perspective, the five dust removal blades 170 belonging to each blade assembly 175 have different protruding lengths from the blade holder 171.

[0073] More specifically, in each blade assembly 175, the dust removal blades 170 that are farther away from the exhaust port 122 in the axial direction have a longer overall length. From another perspective, in each blade assembly 175, the dust removal blades 170 that are farther away from the exhaust port 122 in the axial direction have a longer protruding length from the blade holder 171.

[0074] <Small diameter annular support part, large diameter annular support part> 10 and 11, the holder 132 has five small diameter annular support portions 165 and five large diameter annular support portions 166. Furthermore, the small diameter annular support portions 165 and the large diameter annular support portions 166 are provided alternately along the axial direction.

[0075] The five small diameter annular support portions 165 have different outer diameters. More specifically, of the five small diameter annular support portions 165, the smaller the outer diameter of the small diameter annular support portion 165 that is farther away from the base portion 140 in the axial direction.

[0076] Similarly, the five large-diameter annular support portions 166 have different outer diameters. More specifically, of the five large-diameter annular support portions 166, the larger the outer diameter of the large-diameter annular support portion 166 that is farther away from the base portion 140 in the axial direction, the smaller its outer diameter.

[0077] In other words, the holder 132 is tapered as a whole. That is, the change in the outer diameter of the holder 132 in the axial direction is opposite to the change in the overall length of the dust removal blade 170 in the same direction. As a result, further improvement in the ease of attachment and detachment of the dust case 104 can be expected.

[0078] As shown in FIG. 10, the small diameter annular support portion 165 faces the dust removal blade 170 with the filter 131 interposed therebetween, but the large diameter annular support portion 166 does not face the dust removal blade 170 .

[0079] From another perspective, the second support portion 160 facing the dust removal blade 170 is the small diameter annular support portion 165 , and the second support portion 160 not facing the dust removal blade 170 is the large diameter annular support portion 166 .

[0080] The dust removal blade 170 faces the small diameter annular support portion 165 between two axially adjacent large diameter annular support portions 166. In other words, the dust removal blade 170 facing the small diameter annular support portion 165 is inserted between the two large diameter annular support portions 166 located on both sides of the small diameter annular support portion 165.

[0081] Therefore, in this embodiment, when dust is scraped off from the filter 131 by the dust removal blade 170, the small diameter annular support portion 165 is solely responsible for preventing the filter 131 from deforming radially inward.

[0082] (Third embodiment) 13 is a cross-sectional view showing the structure of a cleaner 1C according to this embodiment. While the cleaners 1A and 1B described so far are filter types, the cleaner 1C according to this embodiment is a cyclone type.

[0083] In cleaner 1C, relatively large dust particles contained in the air that flows into dust collection chamber 220 from intake port 221 are centrifuged in dust collection chamber 220. Thereafter, the air from which the large dust particles have been separated passes through filter device 230 and moves to main case 203. At this time, dust particles (relatively small dust particles that have not been centrifuged) contained in the airflow passing through filter device 230 are captured by filter 231.

[0084] The filter device 230 included in the cleaner 1C has a smaller outer diameter than the filter device 30 included in the cleaner 1A, but the structure is substantially the same. Specifically, the filter device 230 has a bag-shaped filter 231 and a holder 232 that supports the filter 231 from the inside.

[0085] Furthermore, the holder 232 of the filter device 230 has a plurality of columnar first support portions 250 and a plurality of annular second support portions 260. Furthermore, the second support portions 260 are located radially outward of the first support portions 250.

[0086] (Variation 1) Fig. 14 is a perspective view showing a modified example of the holder 32 shown in Fig. 3 etc. The holder 332 shown in Fig. 14 has a plurality of first support portions 350 extending in the axial direction and a series of second support portions 360 extending in the circumferential direction. More specifically, the holder 332 has twelve first support portions 350.

[0087] Each of the first support portions 350 has a flat plate shape, and each of the second support portions 360 has a spiral shape. The first support portions 350 are located radially inside the base portion 340. The second support portions 360 are located radially outside the first support portions 350.

[0088] Therefore, in the filter device having the holder 332, the filter is supported by the second support portion 360. More specifically, the filter is supported by a continuous outer peripheral surface 360a of the second support portion 360.

[0089] (Variation 2) Fig. 15 is a perspective view showing another modified example of the holder 32 shown in Fig. 3 etc. The holder 432 shown in Fig. 15 has a plurality of first support portions 450 extending in the axial direction and a plurality of second support portions 460 extending in the circumferential direction. More specifically, the holder 432 has twelve first support portions 450 and ten second support portions 460.

[0090] Each of the first support portions 450 is flat, and each of the second support portions 460 is annular. The first support portions 450 are located outside the second support portions 460 in the radial direction.

[0091] Therefore, in the filter device having the holder 432, the filter is supported by the first support portions 450. More specifically, the filter is supported by the outer surface 450a of each of the first support portions 450.

[0092] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0093] 1A, 1B, 1C...Cleaner 2. Case 11...Motor 12...Fan 20,220…Dust collection chamber 21,221…Air intake 22,122…Exhaust port 30, 130, 230...Filter device 31,131,231…filter 31a...Outer surface 31b…Inner peripheral surface 32,132,232,332,432…Holder 40,140,340…Base 50,150,250,350,450…First support part (column support part) 60, 160, 260, 360, 460...Second support part (annular support part) 61…First area 62…Second area 70, 70a, 70b, 70c, 170...Dust removal blade 165...Small diameter annular support part 166...Large diameter annular support part

Claims

1. A motor; a fan that rotates by receiving the driving force of the motor; a case that supports the motor and the fan and defines a dust collection chamber therein; a filter device disposed inside the case and covering the exhaust port of the dust collection chamber, The filter device comprises: a bag-shaped filter capable of capturing dust contained in the passing airflow; a holder attached to the case and positioned inside the filter to support the filter, The holder is A cylindrical base; a first support portion extending in the axial direction of the base portion; a second support portion extending in a circumferential direction around the axis, One longitudinal end of the first support portion is connected to the base portion, The second support portion is located outside the first support portion in a radial direction centered on the axis.

2. A motor; a fan that rotates by receiving the driving force of the motor; a case that supports the motor and the fan and defines a dust collection chamber therein; a filter device disposed inside the case and covering the exhaust port of the dust collection chamber, The filter device comprises: a bag-shaped filter capable of capturing dust contained in the passing airflow; a holder attached to the case and positioned inside the filter to support the filter, The holder is A cylindrical base; a first support portion extending in the axial direction of the base portion; a second support portion extending in a circumferential direction around the axis, One longitudinal end of the first support portion is connected to the base portion, A work machine, wherein a width dimension of the second support portion along a radial direction centered on the axis is greater than a thickness dimension of the second support portion along the direction of the axis.

3. The work machine according to claim 1 or 2, a plurality of the first support portions are provided along a circumferential direction around the axis, A work machine, wherein a plurality of the second support portions are provided along the direction of the axis.

4. The work machine according to claim 3, Each of the first support portions is columnar, Each of the second support portions is annular.

5. The work machine according to claim 4, the case has a dust removal member that contacts an outer peripheral surface of the filter, a second support portion having an outer peripheral surface facing the inner peripheral surface of the filter, the second support portion having an outer peripheral surface facing the inner peripheral surface of the filter, the second support portion including a first region and a second region that is farther away from the inner peripheral surface of the filter than the first region in a radial direction centered on the axis;

6. The work machine according to claim 5, The first regions and the second regions are alternately provided along the circumferential direction of the second support portion.

7. The work machine according to claim 5, A plurality of the dust removal members are provided at predetermined intervals along the axial direction, the second support portions include a plurality of small-diameter annular support portions that face the dust-removing member across the filter, and a plurality of large-diameter annular support portions that do not face the dust-removing member, Among the plurality of small-diameter annular support portions, the small-diameter annular support portions that are farther away from the base portion in the axial direction have smaller outer diameters, A work machine, wherein among the plurality of large diameter annular support portions, the larger diameter annular support portions that are farther away from the base portion in the axial direction have smaller outer diameters.

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