Work equipment

Abstract

To provide a working machine that improves workability.SOLUTION: A working machine 1 comprises a motor 92, a fan 93 to be operated by receiving a driving force of the motor 92, a main body part comprising the motor 92 and the fan 93, a duct collection case 30 covering at least a portion of a surface of the main body part, and a drawing part 40 detachably fitted between the main body part and the dust collection case 30. The main body part comprises a claw part 23 engaged with the drawing part 40. The drawing part 40 comprises a latch engagement part 48 engaged with the claw part 23, and a claw part 47 engaged with the duct collection case 30. The duct collection case 30 comprises a latch engagement part 35 engaged with the claw part 47.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] The following Patent Document 1 discloses a work machine having a structure in which a dust collection case is attached to a main body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 106493 Summary of the Invention [Problem to be solved by the invention]

[0004] In a work machine such as that described in Patent Document 1, there is a demand for providing separate components such as a scraping member that scrapes out dust inside the dust collection case and a dust removal mechanism that removes dust from a filter provided in the main body. If the number of engaging parts on the main body and dust collection case increases in order to lock the separate components, the product will become larger in size to ensure installation space for the engaging parts, which could impair workability.

[0005] An object of the present invention is to provide a work machine with improved workability. [Means for solving the problem]

[0006] One aspect of the present invention is a work machine. A motor; an operating unit that operates by receiving the driving force of the motor; a main body having the motor and the operating unit; a cover portion that covers at least a portion of the surface of the main body portion; a separate member detachably attached between the main body and the cover, the main body portion has a first engagement portion that engages with the separate member, the separate member has a second engaging portion that engages with the first engaging portion and a third engaging portion that engages with the cover portion, The cover portion has a fourth engagement portion that engages with the third engagement portion.

[0007] The present invention may be expressed as an "electric working machine," "electric tool," "electrical equipment," etc., and such expressions are also valid aspects of the present invention. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a work machine with improved workability. [Brief explanation of the drawings]

[0009] [Figure 1] 1A is a left side view of a working machine 1 according to a first embodiment of the present invention, and FIG. 1B is a bottom view of the working machine 1. FIG. [Figure 2] (A) is a cross-sectional view taken along the line AA in Figure 1(B). (B) is an enlarged view of part B in Figure 2(A). (C) is an enlarged view of part C in Figure 2(A). [Figure 3] 3A is an enlarged view of the front part of FIG. 2A, and FIG. 3B is a view of FIG. 3A in a state where the cover part 51 is deformed and the inlet 31 is open. [Figure 4] FIG. [Figure 5] 1 is an exploded perspective view of the work machine 1, showing a state in which the dust collection case 30 and the drawer section 40 are separated from the main body housing 10. FIG. [Figure 6] FIG. 3 is a perspective view of the dust collection case 30 and the drawer portion 40 in a separated state. [Figure 7] FIG. 2 is an exploded perspective view of a filter device 60 of the work machine 1. [Figure 8] FIG. 6 is an exploded perspective view of a main part of a work machine 2 according to a second embodiment of the present invention. [Figure 9] 9A is a cross-sectional view of a main part of the work machine 2. FIG. 9B is an enlarged view of part B1 in FIG. 9A. FIG. 9C is an enlarged view of part C1 in FIG. 9A. [Figure 10] FIG. 11 is an exploded perspective view of a main part of a work machine 3 according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] (Embodiment 1) 1 to 7 relate to a work machine 1 according to a first embodiment of the present invention. The work machine 1 is a cordless cleaner (dust collecting device) that operates on power from a battery pack 19.

[0011] 1(A) and (B) define the mutually orthogonal front-rear, up-down, and left-right directions of the work machine 1. The front-rear direction is a direction parallel to the drive shaft 92a of the motor 92. The front-rear direction corresponds to the first direction. The front side corresponds to one side of the first direction. The rear side corresponds to the other side of the first direction. The left-right direction is a direction perpendicular to an imaginary plane on which the drive shaft 92a and the central axis of the handle portion 12 exist.

[0012] The work machine 1 has a main body housing 10. The main body housing 10 is formed by, for example, two separate resin molded bodies, left and right, which are fixed together and integrated by screws or the like. The main body housing 10 includes a motor accommodating section 11, a handle section 12, and a battery pack mounting section 13.

[0013] The motor housing 11 has a tubular shape, for example, a substantially cylindrical shape, with a central axis parallel to the front-rear direction. As shown in Fig. 2(A), the motor housing 11 houses therein a motor 92 as a drive unit and a fan 93 as an operating unit.

[0014] As shown in Fig. 3(A), the motor housing 11 has an air intake 14 in front of the fan 93. The air intake 14 serves as an entrance for the airflow generated by the fan 93. As shown in Figs. 1(A) and 1(B), the motor housing 11 has a plurality of exhaust ports 15 on each of its left and right side surfaces. The exhaust ports 15 serve as exit ports for the airflow generated by the fan 93.

[0015] The handle portion 12 extends rearward from the center in the left-right direction of the upper rear end of the motor housing portion 11, substantially parallel to the front-rear direction.

[0016] The battery pack attachment section 13 is connected to the rear end of the handle section 12. A battery pack 19 is detachably attached to the battery pack attachment section 13. The battery pack 19 can be attached to the battery pack attachment section 13 by sliding it diagonally from the upper rear to the lower front. The motor 92 is driven by the power of the battery pack 19 attached to the battery pack attachment section 13.

[0017] The work machine 1 has latch members 21 at the top and bottom of the motor accommodating section 11. The latch members 21 are members for locking the dust collection case 30 and the drawer section 40 to the main housing 10. As shown in Figures 2(B) and 2(C), the latch members 21 are biased by springs 24 in a direction that causes them to protrude radially outward from the motor accommodating section 11.

[0018] As shown in FIGS. 2B and 2C, the latch member 21 has a pressing portion 22 and a claw portion 23. The pressing portion 22 is a portion that an operator presses to release the latch member 21 from engagement. As shown in FIG. 2B, the claw portion 23 of the upper latch member 21 is a protrusion erected upward (radially outward from the dust collection case 30) and is an example of a fifth engagement portion. It hooks onto and engages with the latch engagement portion 36 (sixth engagement portion) of the dust collection case 30, thereby locking the dust collection case 30. The claw portion 23 (protrusion) of the lower latch member 21 is a protrusion erected downward (radially outward from the dust collection case 30) and is an example of a first engagement portion. It hooks onto (is inserted into) the latch engagement portion 48 (second engagement portion) of the drawer portion 40, thereby engaging with the latch engagement portion 48, thereby locking the drawer portion 40.

[0019] As shown in Figures 1 and 2(A), the work machine 1 has a switch unit 25 on the top of the handle unit 12. As shown in Figure 2(A), the switch unit 25 is provided with a power button 26, a power increase button 27, and a power decrease button 28. Each time the power button 26 is pressed, the motor 92 is switched between being driven and being stopped. Each time the power increase button 27 is pressed, the rotation speed of the motor 92 increases in stages. Each time the power decrease button 28 is pressed, the rotation speed of the motor 92 decreases in stages. The number of stages for the rotation speed of the motor 92 is, for example, three, but may be two or four or more.

[0020] The work machine 1 has a dust collection case 30 as a cover. The dust collection case 30 is, for example, a single resin molded body. The dust collection case 30 covers the front of the main body housing 10 and also covers the periphery and front of the filter device 60. The dust collection case 30 is also referred to as a dust case. As shown in FIG. 3(A), the dust collection case 30 has an inlet 31, a dust collection chamber 32, and an outlet 34.

[0021] The inlet 31 is a nozzle part having a cylindrical shape with a central axis parallel to the front-rear direction, and is provided at the front end (front side) of the dust collection case 30. The inlet 31 may also be referred to as an intake port or intake part. The inlet 31 is an entrance through which the airflow generated by the fan 93 flows from the outside into the dust collection chamber 32. The inlet 31 is located forward of the outlet 34.

[0022] The dust collection chamber 32 is formed inside the dust collection case 30. The dust collection chamber 32 has a cylindrical shape and is connected to the rear of the inlet 31. The sides and upper parts of the outer and inner surfaces of the dust collection chamber 32 are tapered (having a shape that becomes smaller in diameter as it goes forward). In other words, the dust collection chamber 32 has a cylindrical shape that tapers toward the front. The dust collection chamber 32 has a larger diameter than the inlet 31. The dust collection chamber 32 has larger internal dimensions than the inlet 31 when viewed from the front. The dust collection chamber 32 is located between the inlet 31 and the outlet 34. The dust collection chamber 32 collects (stores) dust that flows in from the inlet 31 together with the airflow.

[0023] The outlet 34 is provided at the rear (rear side) of the dust collection case 30 and is connected (communicates) with the intake port 14 of the main body housing 10. The outlet 34 is a passage through which the airflow generated by the fan 93 flows from inside the dust collection chamber 32 into the main body housing 10 (is sucked into the fan 93).

[0024] The dust collection case 30 has an extension 33 that extends the outer wall of the dust collection chamber 32 rearward. The extension 33 is cylindrical. As shown in FIGS. 2(B) and 2(C), the dust collection case 30 has latch engagement portions 35, 36 at the bottom and top of the extension 33. The latch engagement portion 35 is an example of a fourth engagement portion, and is a portion that hooks onto (is inserted into) the claw portion 47 (third engagement portion) of the drawer portion 40. The latch engagement portion 36 is a portion that hooks onto the claw portion 23 of the upper latch member 21. The latch engagement portion 35 is a through-hole (opening) that penetrates the extension 33 of the dust collection case 30 in the radial direction of the dust collection case 30, and the latch engagement portion 36 is a recess (groove) on the inner surface of the extension 33.

[0025] In the process of sliding the dust collection case 30 with the attached drawer portion 40 backward relative to the main housing 10 (the process of transitioning from the state of Figure 5 to the state of Figure 4), the claw portion 47 of the drawer portion 40 hooks (engages) with the latch engagement portion 35, and the claw portion 23 of the upper latch member 21 hooks (engages) with the latch engagement portion 36, so that the dust collection case 30 and the drawer portion 40 are locked (fixed) to the main housing 10.

[0026] The work machine 1 has a drawer section 40. The drawer section 40 is disposed inside the dust collection chamber 32. The drawer section 40 is a separate member that moves rearward relative to the dust collection case 30 to draw out (scrape out) dust inside the dust collection chamber 32. The drawer section 40 is also referred to as a scraper. The drawer section 40 extends forward of the filter device 60. The front end of the drawer section 40 abuts against the periphery of the rear opening of the inlet 31.

[0027] As shown in FIG. 6, the drawer 40 has a base 41, a pillar 42, an intermediate connecting portion 43, and a front end connecting portion 44 as a frame portion made of, for example, a resin molded body.

[0028] The base 41 is an annular portion, and its outer edge follows the inner circumferential surface of the dust collection case 30. The front surface of the base 41 forms the inner surface of the dust collection chamber 32, which faces forward. That is, the base 41, together with the dust collection case 30, constitutes a dust collection unit. As shown in FIG. 3(A), the lower part of the base 41 is disposed so as to overlap with the inlet 31 in a front-to-rear view (their ranges of existence in the up-down and left-to-right directions overlap each other), and forms a wall portion extending in a direction intersecting the front-to-rear direction. The back surface of the base 41 engages (abuts) with the front end of the main housing 10 as shown in FIG. 2(A) and is pressed forward. That is, the rear end of the drawer 40 abuts the main housing 10 and is pressed forward toward the dust collection chamber 32.

[0029] The two pillars 42 each extend forward from the base 41. No pillars 42 are present within a range of approximately 120 degrees centered directly below the central axis of the dust collection chamber 32. One of the pillars 42 is located directly above the central axis of the dust collection chamber 32 and has a wide portion 42a at its front. The wide portion 42a is a flat portion perpendicular to the left-right direction and is wider in the up-down direction than the rear portion of the wide portion 42. The wide portion 42a has a first abutment portion 42b, a second abutment portion 42c, and a third abutment portion 42d.

[0030] The first abutment portion 42b is the upper edge (upper end) of the wide portion 42a and slopes downward as it moves forward. At a position separated from the latch engagement portion 48, the first abutment portion 42b abuts against a portion of the inner surface (inner wall) of the dust collection chamber 32 that slopes inward as it moves forward. This restricts the forward movement of the drawer portion 40.

[0031] The second contact portion 42c is an end portion facing rearward of the wide portion 42, and contacts the front end portion of the filter 61 supported by the frame member 62. This restricts the filter 61 and the frame member 62 from moving forward.

[0032] The third contact portion 42d is a portion extending downward from the front end of the wide portion 42, and contacts the upper part of the rear surface of the cover portion 51 of the restricting portion 50.

[0033] The intermediate connector 43 connects the longitudinal middle portions of the two pillars 42 in a substantially arc shape around the central axis of the dust collection chamber 32, and also connects the longitudinal middle portion of the upper pillar 42 to the base 41. The intermediate connector 43 does not exist within a range of approximately 120 degrees centered directly below the central axis of the dust collection chamber 32.

[0034] The front-end connecting portion 44 is a planar portion perpendicular to the front-to-rear direction, and connects the front ends of the two pillar portions 42 in a substantially circular shape around the central axis of the inlet 31. The drawer 40 has a holding portion 45 connected to the front-end connecting portion 44. The holding portion 45 is located directly above the central axis of the dust collection chamber 32. The holding portion 45 has a cylindrical shape with a central axis parallel to the left-to-right direction. The holding portion 45 is a portion that holds the mounting portion 52 of the restriction portion 50.

[0035] The drawer 40 has a restricting portion 50. The restricting portion 50 is made of an elastic material such as rubber. The restricting portion 50 is disposed adjacent to and rear of the rear end of the inlet 31. That is, the front end of the drawer 40 contacts the rear end of the inlet 31.

[0036] The restricting portion 50 is a valve for preventing backflow of dust. The restricting portion 50 allows air to flow from the outside of the dust collection case 30 to the inside of the dust collection case 30 (inside the dust collection chamber 32) through the inlet 31, and restricts the outflow of dust from the inside of the dust collection case 30 (inside the dust collection chamber 32) to the outside of the dust collection case 30 through the inlet 31.

[0037] The restriction part 50 has a cover part 51 and an attachment part 52. The cover part 51 is a plate-shaped part that abuts against the inlet 31 from the inside (abuts against the rear end part of the inlet 31) so as to close the inlet 31. This abutting force is applied when the back surface of the base part 41 is pressed forward by the main body housing 10, as described above. The attachment part 52 is connected to the upper end part of the cover part 51 and is held inside the holding part 45. The restriction part 50 can be attached to the holding part 45 by fitting the attachment part 52 into the holding part 45 from the right.

[0038] 3(B) about the contact point with the lower end of the third abutment portion 42d as a fulcrum due to the airflow flowing from the outside of the dust collection case 30 to the inside of the dust collection case 30 (inside the dust collection chamber 32) through the inlet 31. Because the front surface of the cover portion 51 contacts the periphery of the inlet 31, the cover portion 51 does not swing forward (is unable to swing).

[0039] 6, the drawer 40 has an extension 46 extending rearward from the lower portion of the base 41. A portion of the extension 46 forward of the handle 49 is sandwiched (clamped) from above and below between the outer surface of the motor accommodating portion 11 of the main body housing 10 and the inner surface of the extension 33 of the dust collection case 30. The extension 46 has a claw 47 (protrusion) as a third engagement portion, a latch engagement portion 48 as a second engagement portion, and the handle 49 as an extension.

[0040] The claw portion 47 is a protrusion that stands downward (radially outward from the dust collection case 30) from the underside of the extension portion 46, and is hooked onto (inserted into) the latch engagement portion 35 of the extension portion 33 of the dust collection case 30, thereby engaging with the latch engagement portion 35. This restricts rearward movement of the drawer portion 40 relative to the dust collection case 30.

[0041] The latch engagement portion 48 is a through-hole that passes through the extension portion 46 in the radial direction (vertical direction) of the dust collection case 30, and the claw portion 23 of the lower latch member 21 is caught in the latch engagement portion 48. This restricts the forward movement of the dust collection case 30 and the drawer portion 40 relative to the main body housing 10. When the drawer portion 40 is attached to the dust collection case 30, the through-hole 48 is covered by the extension portion 33 of the dust collection case 30 and cannot be seen.

[0042] The handle 49 extends rearward from the rear end of the dust collection case 30. The operator presses the handle 49 to release the engagement between the claw 47 and the latch engagement portion 35. By moving the drawer 40 rearward relative to the dust collection case 30 while pressing the handle 49, the drawer 40 can be removed from the dust collection case 30 as shown in FIG. 6.

[0043] As shown in FIG. 6 , the drawer 40 has dust removal blades 56 as a dust removal unit. The dust removal blades 56 are attached to the base 41 by, for example, integral molding, and extend radially inward from the base 41. Here, nine dust removal blades 56 are arranged in a segmented circle along the outer shape of the filter 61 when viewed from the front. A "segmented circle" is a figure obtained by cutting out a portion of a circle and is composed of an arc and a chord connecting both ends of the arc. When the dust collection case 30 and the drawer 40 are removed forward from the main housing 10, the dust removal blades 56 slide forward along the outer circumferential surface of the filter 61, thereby removing dust accumulated on (adhering to) the outer circumferential surface of the filter 61.

[0044] The work machine 1 has a filter device 60. The filter device 60 is disposed inside the dust collection chamber 32 so as to be located between the inlet 31 and the outlet 34, and captures dust contained in the air flowing from the inlet 31 to the outlet 34. The filter device 60 is attached to the main body housing 10. The main body housing 10 and its internal configuration, as well as the filter device 60, constitute the main body of the work machine 1.

[0045] The filter device 60 has a filter 61. The filter 61 is cylindrical (bag-shaped) with a closed front end and an opening at the rear end. The opening at the rear end of the filter 61 is connected to the outlet 34 of the dust collection case 30. The filter 61 separates (collects) dust from the airflow passing from the outside to the inside.

[0046] As shown in FIG. 7, the filter device 60 has a frame member 62. The frame member 62 is, for example, a resin molded body. The frame member 62 supports the filter 61 in a partially cut-out cylindrical shape with a closed front end and an opening at the rear end, with the cross section of the filter 61 being circular and having a notch cut out at the lower side when viewed in the front-to-rear direction. A "partial cut-out cylinder" is a tube with a partially cut-out circular cross section. As a result, the upper side of the filter 61 has a curved shape with an arc-shaped cross section when viewed in the front-to-rear direction, and the lower side of the filter 61 has a flat plate shape.

[0047] The filter 61 and the frame member 62 constitute a filter unit. The filter unit is formed in a columnar shape extending in the front-to-rear direction. The second abutment portion 42c described above extends to a position below the central axis X of the filter unit shown in FIG. 2(A) and abuts against the filter unit in a range including above the central axis X. The main body of the work machine 1, including the filter unit, penetrates the base 41.

[0048] The frame member 62 includes a base 63. The base 63 includes a notched cylindrical portion 63a and an inclined cylindrical portion 63b. The notched cylindrical portion 63a has a circular cross-sectional shape with the lower side cut out when viewed in the front-to-rear direction. The notched cylindrical portion 63a is parallel to the front-to-rear direction. The inclined cylindrical portion 63b continues in front of the notched cylindrical portion 63a. The inclined cylindrical portion 63b has a circular cross-sectional shape with the lower side cut out when viewed in the front-to-rear direction, and is an inclined cylindrical portion that widens overall as it goes forward.

[0049] A notch 63c is provided at the rear of the base 63, and a tongue portion 63d that forms a snap fit is provided in the notch 63c. The notch 63c and the tongue portion 63d are provided at the top and bottom of the base 63, respectively, but only the one at the top is visible in Figure 7.

[0050] The frame member 62 includes pillars 64. The pillars 64 extend forward from the base 63 (the front end of the inclined cylindrical portion 63b). Here, seven pillars 64 are arranged in the shape of a partial circle. Specifically, of the seven pillars 64, the three pillars 64 located on the upper side are arranged in an arc shape. Furthermore, of the seven pillars 64, the four pillars 64 located on the lower side are arranged in a straight line, and the positions of the lower ends of the four pillars 64 in the up-down direction are approximately equal. The seven pillars 64 are connected to each other at their front ends.

[0051] The central axis of the arc-shaped portion of the filter 61 supported in a cylindrical shape by the frame member 62 is approximately coaxial with the central axis of the dust collection case 30 .

[0052] The filter device 60 has a holder 67. The holder 67 is, for example, a resin molded body. The holder 67 is a member that supports the rear end of the frame member 62 and holds the rear end of the filter 61 between the holder 67 and the base 63 of the frame member 62.

[0053] As shown in FIG. 7, the outer peripheral surface of the holder 67 forms a notched cylindrical shape with a central axis parallel to the front-to-rear direction. The inner peripheral surface of the holder 67 includes a notched cylindrical inner surface portion 73a and an inclined cylindrical inner surface portion 73b. The notched cylindrical inner surface portion 73a has a circular cross-sectional shape with the lower side cut out when viewed in the front-to-rear direction. The notched cylindrical inner surface portion 73a is parallel to the front-to-rear direction. The inclined cylindrical inner surface portion 73b continues in front of the notched cylindrical inner surface portion 73a. The inclined cylindrical inner surface portion 73b has a circular cross-sectional shape with the lower side cut out when viewed in the front-to-rear direction, and is an inclined cylindrical inner surface portion that widens overall as it extends forward.

[0054] By assembling the frame member 62 supporting the filter 61 to the holder 67 from the front, the rear end of the filter 61 can be held (clamped) between the outer surface of the base 63 (the outer surfaces of the notched cylindrical portion 63a and the inclined cylindrical portion 63b) and the inner surface of the holder 67 (the notched cylindrical inner surface portion 73a and the inclined cylindrical inner surface portion 73b).

[0055] The holder 67 has two hook portions 68 at the top and bottom that engage with the tongue portion 63d of the frame member 62. The tongue portion 63d hooks onto the hook portions 68, thereby locking the holder 67 to the frame member 62.

[0056] The filter device 60 has a ring-shaped elastic member 75 attached to the rear end of the holder 67. The elastic member 75 airtightly seals the gap between the rear end of the holder 67 and the front surface of the main housing 10 around the entire periphery of the intake port 14.

[0057] When filter device 60 is aligned with the front end of main body housing 10 and rotated clockwise by a predetermined angle as viewed from the front, a pair of rotational fitting protrusions 69 of holder 67 and a pair of rotational fitting recesses (not shown) of main body housing 10 rotate and fit together, and filter device 60 is attached to the front end of main body housing 10. In this state, the opening at the rear end of filter 61 is connected (communicates) with air intake 14 so that air flows through filter 61 from the outside to the inside.

[0058] As shown in Fig. 2(A), the work machine 1 has a motor 92 and a fan 93 inside the motor housing 11. The motor 92 and the fan 93 are a fan motor unit integrated into the case 91, and may be commercially available products.

[0059] The motor 92 is, for example, an inner rotor type brushless motor, and has a drive shaft 92a, a rotor 92b, and a stator 92c. The fan 93 is directly connected to the drive shaft 92a at the front of the main body of the motor 92 (the portion of the motor 92 excluding the drive shaft 92a), and rotates together with the motor 92. The fan 93 is a fan unit that rotates by the driving force of the motor 92 to generate an airflow.

[0060] The operation of the work machine 1 will now be described.

[0061] When the power button 26 is pressed, the motor 92 starts. The motor 92 rotates at the same speed as when it was last driven. The fan 93 rotates together with the motor 92, generating an airflow. This airflow enters the dust collection chamber 32 through the inlet 31, passes through the filter 61, and is drawn into the fan 93 through the outlet 34 and the intake 14. After cooling the motor 92, the airflow is exhausted to the outside of the main housing 10 through the outlet 15. Dust enters the dust collection chamber 32 through the inlet 31 along with the airflow, but is unable to pass through the filter 61. Instead, it is captured by the filter 61 and accumulates in the dust collection chamber 32. At this time, as shown in FIG. 3(B), the cover 51 swings rearward about the contact point with the lower part of the third contact portion 42d as a fulcrum. As a result, the dust is guided diagonally downward and rearward within the dust collection chamber 32 and tends to accumulate in the space below the filter 61.

[0062] Dust accumulated in the dust collection chamber 32 is discharged (removed) as follows.

[0063] First, the upper and lower latch members 21 of the main body housing 10 are operated to release the latch members 21, while the dust collection case 30 is moved forward relative to the main body housing 10 (FIGS. 4 and 5). Because the claws 47 of the drawer 40 are hooked onto the latch engagement portions 35 of the dust collection case 30, the drawer 40 and the dust collection case 30 also move forward relative to the main body housing 10. At this time, the dust removal blade 56 of the drawer 40 slides forward on the outer peripheral surface of the filter 61, removing dust accumulated on the outer peripheral surface of the filter 61. The removed dust falls into the dust collection case 30.

[0064] Next, while pushing the handle 49 inward to release the engagement between the claw 47 and the latch engagement portion 35, the drawer 40 is moved rearward relative to the dust collection case 30 by holding the handle 49, and the drawer 40 is removed (taken out) from the dust collection case 30. At this time, the drawer 40, and in particular the front end connecting portion 44, draws out (scrapes out) the dust inside the dust collection chamber 32. The operation of removing the drawer 40 from the dust collection case 30 should be performed over a trash can or trash bag, with the rear end opening of the dust collection case 30 facing the direction of gravity.

[0065] To attach the drawer portion 40 to the dust collection case 30, the claw portion 47 of the drawer portion 40 and the latch engagement portion 35 of the dust collection case 30 are aligned with each other in the circumferential direction, the drawer portion 40 is moved relatively forward toward the inside of the dust collection case 30, and the claw portion 47 of the drawer portion 40 is hooked onto the latch engagement portion 35 of the dust collection case 30.

[0066] To attach the dust collection case 30 with the drawer portion 40 attached to the main housing 10, align the connecting portion 46 of the drawer portion 40 and the lower latch member 21 circumferentially, move the dust collection case 30 relatively backward toward the front end of the main housing 10, and hook the claw portion 23 of the lower latch member 21 onto the latch engagement portion 48 of the drawer portion 40, and hook the claw portion 23 of the upper latch member 21 onto the latch engagement portion 36 of the dust collection case 30.

[0067] According to this embodiment, the following effects can be achieved.

[0068] (1) The drawer 40 has a latch engagement portion 48 that engages with the claw portion 23 of the lower latch member 21 and a claw portion 47 that engages with the dust collection case 30. The dust collection case 30 also has a latch engagement portion 35 that engages with the claw portion 47. That is, the main body housing 10 and the dust collection case 30 are connected at their lower parts via the drawer 40. This prevents the main body of the work machine 1 and the dust collection case 30 from having an increased number of engagement portions for engaging the drawer 40, compared to, for example, a case in which locking portions for locking the drawer 40 are provided on the main body housing 10 or the dust collection case 30 in addition to the upper and lower latch members 21 and latch engagement portions 35. This prevents the product from becoming larger and impairing operability due to the need to secure installation space for the engagement portions, and also provides excellent design.

[0069] (2) Since the dust-collection case 30 cannot be reliably locked to the main body housing 10 without the drawer portion 40, it is possible to prevent forgetting to attach the drawer portion 40 to the dust-collection case 30.

[0070] (3) The first abutment portion 42b at the front of the drawer portion 40 abuts against the inner surface of the dust collection chamber 32, restricting the forward movement of the drawer portion 40, and the claw portion 47 at the rear of the drawer portion 40 engages with the latch engagement portion 35 of the dust collection case 30, restricting the backward movement of the drawer portion 40, thereby stabilizing the position of the drawer portion 40 within the dust collection chamber 32.

[0071] (4) The filter device 60 is constructed by assembling the frame member 62 supporting the filter 61 to the holder 67 from the front. Therefore, it is not necessary to pass the pillars 64 of the frame member 62 through the inside of the holder 67 during the assembly process of the filter device 60. Therefore, the outer dimensions of the filter 61 supported by the pillars 64 as viewed in the front-rear direction can be made larger than the inner dimensions of the holder 67 as viewed in the front-rear direction.

[0072] (5) The second contact portion 42c of the pillar portion 42 of the drawer portion 40 (the pillar portion 42 located directly above the central axis of the dust collection chamber 32) contacts the filter 61 from the front. This reduces the risk that the frame member 62 supporting the filter 61 will come off forward from the holder 67 due to an impact, such as when the work machine 1 is accidentally dropped. Here, the second contact portion 42c contacts the filter 61 in a range that includes the central axis X of the filter portion shown in FIG. 2(A), so that the filter portion can be effectively prevented from coming off with only one second contact portion 42c.

[0073] (6) The extension portion 46 of the drawer portion 40 is sandwiched between the outer surface of the motor accommodating portion 11 of the main housing 10 and the inner surface of the extension portion 33 of the dust collection case 30 in the vertical direction (radial direction of the dust collection case 30), so that the extension portion 46 can be stably held.

[0074] (7) Since the vertical direction (downward) of the claw portion 23 of the lower latch member 21 and the vertical direction (downward) of the claw portion 47 of the drawer portion 40 are parallel, the dust collection case 30 can be effectively prevented from coming off the main housing 10.

[0075] (8) The filter device 60 clamps the rear end of the filter 61 between the outer surface of the inclined cylindrical portion 63b of the base 63 and the inclined cylindrical inner surface 73b of the holder 67, so that the clamped portion is highly airtight and the filter 61 is less likely to turn over during assembly.

[0076] (9) Within the dust collection chamber 32, the filter 61 has a shape in which its left-to-right length is greater than its top-to-bottom length. Specifically, within the dust collection chamber 32, the filter 61 has a circular cross-sectional shape with the lower end cut out when viewed from the front-to-back direction. Furthermore, within the dust collection chamber 32, the vertical position of the lower end of the filter 61 overlaps with the vertical extent of the inlet 31. Furthermore, the lower end of the filter 61 is located above the central axis of the inlet 31. This ensures a large space between the lower part of the filter 61 and the opposing inner surface of the dust collection chamber 32. This prevents the filter 61 from becoming buried in dust and prevents premature clogging of the filter 61. This allows a high suction airflow to be maintained for a long period of time, and reduces the frequency of removing dust from the dust collection case 30 and cleaning the filter 61, improving workability. In the case of a cylindrical filter with an outer diameter that is the same length as the vertical length of filter 61, the filter surface area is small and clogs quickly, but filter 61 has a larger surface area than such a cylindrical filter, so early clogging can be suppressed. Also, if a cylindrical filter with the same diameter as the arc-shaped portion of filter 61 is used and the dust collection case 30 is configured to expand downward, the dust collection case will become larger, but this embodiment does not require such an increase in size.

[0077] (10) As shown in FIG. 3(B), the cover portion 51 swings rearward around the contact point with the lower part of the third abutment portion 42d as a fulcrum, so that dust can be guided diagonally downward and rearward within the dust collection chamber 32 and collected in the large space below the filter 61 as described above.

[0078] (11) When the drawer 40 is removed from the dust collection case 30 through the outlet 34, it draws out (scrapes out) dust from the dust collection chamber 32 through the outlet 34. Therefore, even if the dust collection chamber 32 is clogged with dust and cannot be discharged simply by turning the rear end opening of the dust collection case 30 downward, removing the drawer 40 from the dust collection case 30 allows for easy removal of the dust from the dust collection chamber 32, resulting in improved workability. In particular, if the radial dimension of the dust collection case 30 is reduced for design reasons, the dust collection case 30 must be elongated in the front-to-rear direction to ensure a high dust capacity, which can easily cause clogging. In this embodiment, even if the dust collection case 30 has an elongated shape, dust can be easily removed from the dust collection chamber 32, resulting in improved workability. In other words, this embodiment allows for the dust collection case 30 to have an elongated shape, thereby enabling a reduction in the radial size.

[0079] (12) The drawer 40 has a restricting portion 50 at its front end portion that functions as a valve portion that prevents dust from flowing out from the dust collection chamber 32 toward the inlet 31. The drawer 40 also has a dust removal blade 56 for removing dust from the filter 61. In other words, the drawer 40 is not a dedicated member for drawing dust from the dust collection chamber 32. Therefore, compared to when a dedicated member for drawing dust from the dust collection chamber 32 is separately provided, it is possible to suppress an increase in the number of parts, an increase in product weight, and costs.

[0080] (13) In order for the restriction unit 50 to close the inlet 31, the drawer unit 40 needs to extend to the front end of the dust collection chamber 32. However, it is also desirable for the drawer unit 40 to extend to the front end of the dust collection chamber 32 in order to draw dust from the dust collection chamber 32. In other words, by incorporating the function of the restriction unit 50, which needs to extend to the front end of the dust collection chamber 32, into the drawer unit 40, the drawer unit 40 can effectively both close the inlet 31 and draw dust from the dust collection chamber 32.

[0081] (14) Because the drawer 40 has the restricting portion 50, there is no need to fasten the restricting portion 50 to the dust collection case 30 by screwing or the like, which improves assembly. The restricting portion 50 can be easily attached to the holding portion 45 by fitting the mounting portion 52 into the holding portion 45 from the right. The process of fastening the restricting portion 50 to the dust collection case 30 by screwing or the like would make assembly difficult, and this is particularly noticeable when the dust collection case 30 has a long and narrow shape. However, this embodiment can advantageously solve this problem.

[0082] (15) The drawer 40 has a dust removal blade 56. When the drawer 40 is removed from the main housing 10 together with the dust collection case 30, the dust removal blade 56 slides along the outer circumferential surface of the filter 61 to remove dust accumulated on the outer circumferential surface of the filter 61. Therefore, the filter 61 is also cleaned during the process of removing dust from the dust collection case 30, improving workability.

[0083] (Embodiment 2) 8 and 9 relate to a work machine 2 according to a second embodiment of the present invention. In the work machine 2, the drawer portion 40 of the work machine 1 of the first embodiment is replaced with a cleaning brush 140. The following description will focus on the differences from the first embodiment.

[0084] The cleaning brush 140 has a base 146, a claw portion 147, a latch engagement portion 148, a handle portion 149, and a brush portion 150. The base 146, the claw portion 147, the latch engagement portion 148, and the handle portion 149 correspond to the extension portion 46, the claw portion 47, the latch engagement portion 48, and the handle portion 49, respectively, of the drawer portion 40. The brush portion 150 extends forward from the front end portion of the base 146.

[0085] To prevent the cleaning brush 140 from falling off the dust collection case 30 when the dust collection case 30 is removed from the main housing 10, as shown in part B2 of Fig. 9(B), a protrusion 146a at the front lower end of the base 146 fits into a recess 33a on the inner surface of the extension 33 of the dust collection case 30, and as shown in part C2 of Fig. 9(C), a protrusion 147a at the tip of the claw 147 engages with a protrusion 33b on the extension 33 of the dust collection case 30. Such a structure may be provided in the first embodiment.

[0086] (Embodiment 3) 10 is an exploded perspective view of essential parts of work machine 3 according to embodiment 3 of the present invention. In this embodiment, cleaning brush 140 is provided on the upper part of work machine 3. Dust collection case 30A has latch engagement portion 35A (corresponding to latch engagement portion 35) for hooking claw portion 147 of cleaning brush 140, and also has latch engagement portion 36A corresponding to latch engagement portion 36. Latch engagement portion 148 of cleaning brush 140 engages with claw portion 23 of upper latch member 21.

[0087] Although the present invention has been described above using the embodiments as examples, the present invention is not limited to the embodiments. Various modifications can be made to the details specifically described in the embodiments within the scope of the claims.

[0088] In the first embodiment, the claw portion 23 (first engagement portion) of the lower latch member 21 may be configured to engage with the latch engagement portion 35 (fourth engagement portion).

[0089] The work machine 1 is not limited to the cleaner exemplified in the embodiment, and may be of other types. For example, a separate member such as a cleaning brush 140 may be provided between the dust collection adapter and the dust collection case of a hammer drill. In this case, the main body housing of the hammer drill and the dust collection adapter correspond to the main body.

[0090] The number of columns 42, 64 and the number of dust removal blades 56, which are given as specific numerical values ​​in the embodiments, do not limit the scope of the invention in any way and can be changed as desired to suit the required specifications. [Explanation of symbols]

[0091] 1 to 3...working machine, 10...main body housing, 11...motor housing, 12...handle portion, 13...battery pack mounting portion, 14...air intake port, 15...exhaust port, 19...battery pack, 21...latch member, 22...pressure portion, 23...claw portion, 24...spring, 25...switch portion, 26...power button, 27...power increase button, 28...power decrease button, 30...dust collection case (dust case), 31...inlet (nozzle portion), 32...dust collection chamber, 33...extension portion, 34...outlet (discharge port), 35, 36...latch engagement portion, 40...drawer portion, 41...base portion, 42...pillar portion, 43...intermediate connecting portion, 44...front end connecting portion, 45...holding portion, 46...extension portion, 47...claw portion , 48...latch engagement portion, 49...handle portion, 50...regulating portion, 51...cover portion, 52...mounting portion, 56...dust removal blade, 60...filter device, 61...filter, 62...frame member, 63...base portion, 63a...notched cylindrical portion, 63b...inclined cylindrical portion, 63c...notched portion, 63d...tongue portion, 64...pillar portion, 67...holder, 68...hook portion, 69...rotational engagement convex portion, 73a...notched cylindrical inner portion, 73b...inclined cylindrical inner portion, 75...elastic member, 92...motor (drive portion), 92a...drive shaft, 93...fan (fan portion), 140...cleaning brush, 146...base portion, 147...claw portion, 148...latch engagement portion, 149...handle portion, 150...brush portion.

Claims

1. A motor; an operating unit that operates by receiving the driving force of the motor; a main body having the motor and the operating unit; a cover portion that covers at least a portion of the surface of the main body portion; a separate member detachably attached between the main body and the cover, the main body portion has a first engaging portion that engages with the separate member, the separate member has a second engaging portion that engages with the first engaging portion and a third engaging portion that engages with the cover portion, The cover portion has a fourth engagement portion that engages with the third engagement portion.

2. The work machine according to claim 1 , wherein the separate member has a first contact portion that contacts an inner surface of the cover portion at a position spaced apart from the second engagement portion.

3. The cover portion has a cylindrical shape that tapers toward one side in the first direction, The separate member is the first abutment portion is provided on one side in the first direction, and the first abutment portion abuts against an inner surface of the cover portion, thereby restricting movement toward the one side in the first direction; The work machine according to claim 2 , further comprising the third engagement portion on the other side in the first direction, and wherein movement to the other side in the first direction is restricted by the third engagement portion engaging with the fourth engagement portion.

4. the main body portion includes a main body housing having the motor and the operating portion, and a filter portion attached to the main body housing; the filter unit is detachable from the main body housing by moving to one side in the first direction, The work machine according to claim 3 , wherein the separate member has a second contact portion that contacts the filter portion on one side in the first direction and restricts movement of the filter portion.

5. The filter portion is formed in a columnar shape extending in the first direction, The work machine according to claim 4 , wherein the second contact portion contacts the filter portion on a central axis of the filter portion.

6. The work machine according to claim 3 , wherein the separate member has an annular portion, and the main body portion passes through the annular portion.

7. The work machine according to claim 3 , wherein the separate member has an extension portion that extends to the other side in the first direction from an end portion of the cover portion on the other side in the first direction.

8. the fourth engagement portion is an opening provided in the cover portion, the third engaging portion is a protrusion that stands upright from the separate member and is inserted into the fourth engaging portion to engage with the fourth engaging portion, The work machine according to claim 1 , wherein the cover portion sandwiches the separate member between the cover portion and the main body portion in the direction in which the third engagement portion is erected.

9. the second engagement portion is an opening provided in the separate member, the first engaging portion is a protrusion that stands upright from the main body portion and is inserted into the second engaging portion to engage with the second engaging portion, The work machine according to claim 8 , wherein the first engaging portion is provided in a direction parallel to the third engaging portion.

10. the main body portion has a fifth engagement portion that engages with the cover portion, The work machine according to claim 1 , wherein the cover portion has a sixth engaging portion that engages with the fifth engaging portion.

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