Dust collection device and work machine

Abstract

To improve workability.SOLUTION: In a dust collection device 70, a nozzle 72 includes a tool insertion part 77 through which a bit 60 (bit 160) is inserted, and a suction part 76 which is connected to the tool insertion part 77. The tool insertion part 77 includes a nozzle mounting portion 78 connected to the suction part 76, and a spacer 80 detachably attached to the nozzle mounting portion 78. Here, the tool insertion part 77 is connected to the suction part 76 so that the relative angle of the suction part 76 with respect to an axis line AL1 of the bit 60 (bit 160), as viewed from above, can be changed. Specifically, depending on the bit 60 and the bit 160 with the different thickness, the form of the tool insertion part 77 is changed by attaching or detaching the spacer 80 to or from the nozzle mounting portion 78, thereby changing the relative angle of the suction part 76 with respect to the axis line AL1. As a result, the posture with respect to a processing surface SF can be adjusted according to the work form.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a dust collecting device and a working machine.

Background Art

[0002] In the working machine described in Patent Document 1 below, the cover portion (suction portion) of the dust collecting device is supported by the tip tool, and dust generated during processing is sucked by the cover portion. Further, in this working machine, the mounting position of the cover portion with respect to the tip tool in the circumferential direction of the tip tool can be changed. Thereby, the extending direction of the hose extending from the cover portion can be changed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above dust collecting device, although the mounting position of the cover portion with respect to the tip tool in the circumferential direction of the tip tool can be changed, the posture of the cover portion with respect to the processing surface (the surface orthogonal to the axis of the tip tool) is always constant. In other words, the cover portion is attached to the tip tool so that the opening end surface of the cover portion is always parallel to the processing surface. On the other hand, in a dust collecting device used in a working machine, for example, by changing the posture of the cover portion according to the working mode, the workability of the working machine can be improved. Therefore, there is room for improvement in the above dust collecting device in terms of improving workability.

[0005] In view of the above facts, an object of the present invention is to provide a dust collecting device and a working machine capable of improving workability.

Means for Solving the Problems

[0006] One or more embodiments of the present invention are a dust collection device that is attached to a work machine main body and sucks dust around a tip tool that extends from the work machine main body to one side in a first direction, the dust collection device including: a cylindrical tool insertion portion through which the tip tool is inserted; and a suction portion that is connected to the tool insertion portion, covers the tip tool, and is open to one side in the first direction. When viewed from a second direction orthogonal to the first direction, the tool insertion portion connects the suction portion such that a relative angle of the suction portion with respect to an axis of the tip tool can be changed.

[0007] One or more embodiments of the present invention are such that the tool insertion portion includes an outer cylinder to which the suction portion is connected, and an inner cylinder that is detachably mounted inside the outer cylinder and is attached to the tip tool. Depending on the thickness of the tip tool, the tip tool is inserted into the tool insertion portion with the inner cylinder removed from the outer cylinder or the tool insertion portion with the inner cylinder mounted on the outer cylinder, so that a relative angle of the suction portion with respect to the axis as viewed from the second direction is changed.

[0008] One or more embodiments of the present invention are such that an inside of the inner cylinder is an inner mounting hole attached to the tip tool, an inside of the outer cylinder is an outer mounting hole attached to the tip tool, and an axis of the outer mounting hole and an axis of the inner mounting hole intersect when viewed from the second direction.

[0009] One or more embodiments of the present invention are such that, when the tool insertion portion with the inner cylinder mounted on the outer cylinder is attached to the tip tool rather than the tool insertion portion with the inner cylinder removed from the outer cylinder being attached to the tip tool, a relative angle of the suction portion with respect to the axis is changed such that an angle of an opening end surface of the suction portion with respect to an orthogonal plane orthogonal to the first direction increases when viewed from the second direction.

[0010] One or more embodiments of the present invention are such that the tool insertion portion includes an outer cylinder to which the suction portion is connected, and an inner cylinder that is detachably mounted inside the outer cylinder and is attached to the tip tool. By replacing the inner cylinder with an inner cylinder of a different form, the relative angle of the suction portion with respect to the axis as viewed from the second direction is changed in the dust collector.

[0011] One or more embodiments of the present invention are such that the inside of the inner cylinder is an inner mounting hole attached to the tip tool, and the tool insertion portion has a plurality of the inner cylinders in which the through direction of the inner mounting hole is different in the dust collector.

[0012] One or more embodiments of the present invention are such that the tool insertion portion includes an outer cylinder connected to the suction portion, and an inner cylinder provided inside the outer cylinder and attached to the tip tool. The inner cylinder is connected to the outer cylinder so as to be able to change the relative angle with respect to the outer cylinder in the dust collector.

[0013] One or more embodiments of the present invention are such that the suction portion is connected to the tool insertion portion so as to be able to change the relative angle with respect to the tool insertion portion inside the tool insertion portion in the dust collector.

[0014] One or more embodiments of the present invention are such that an engaging portion is provided on the outer cylinder, an engaged portion is provided on the inner cylinder, and the engaged portion is engaged with the engaging portion in the circumferential direction of the outer cylinder in the dust collector.

[0015] One or more embodiments of the present invention are such that a regulating portion for regulating the movement of the inner cylinder to one side in the first direction is formed on the outer cylinder in the dust collector.

[0016] One or more embodiments of the present invention include a hose extending from the suction portion, a holder attached to the working machine body and having a hose holding groove in which the hose is disposed, and a band fixed to the holder and winding the hose around the holder. The hose holding groove is formed in a groove shape that is open to the side opposite to the working machine body when viewed from the longitudinal direction of the hose, and the hose holding groove is configured to be able to accommodate hoses of different thicknesses. It is a dust collector.

[0017] One or more embodiments of the present invention are dust collectors in which the bottom surface of the hose holding groove is formed in a V shape that is open to the opening side of the hose holding groove when viewed from the longitudinal direction of the hose, and is composed of a pair of inclined bottom surfaces, and the hose holding groove is in contact with the pair of inclined bottom surfaces.

[0018] One or more embodiments of the present invention are dust collectors in which, in a state before the hose is wound by the band, the hose protrudes from the opening of the hose holding groove and does not contact a pair of side surfaces of the hose holding groove.

[0019] One or more embodiments of the present invention are dust collectors that are attached to a working machine body and suck dust around a tip tool that extends from the working machine body to one side in a first direction. The dust collector includes a cylindrical tool insertion portion through which the tip tool is inserted, and a suction portion connected to the tool insertion portion, covering the tip tool, and opening to one side in the first direction. When viewed from a second direction orthogonal to the first direction, the tip tool can be selected to have a first insertion angle and a second insertion angle different from the first insertion angle with respect to the suction portion.

[0020] One or more embodiments of the present invention are a working machine including a working machine body having a tip tool and a dust collector having the above configuration.

Advantages of the Invention

[0021] According to one or more embodiments of the present invention, workability can be improved.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0023] Hereinafter, with reference to the drawings, the hammer 1 and the hammer 100 as working machines according to the present embodiment will be described. The arrows UP, FR, and RH appropriately shown in the drawings indicate the upper side, the front side, and the right side of the hammer 1 and the hammer 100. In the following description, when the up-down, front-back, and left-right directions are used for explanation, unless otherwise specified, they indicate the up-down direction, the front-back direction, and the left-right direction of the hammer 1 and the hammer 100. The front-back direction corresponds to the first direction of the present invention, and the up-down direction corresponds to the second direction of the present invention.

[0024] As shown in FIGS. 1 and 3, the hammer 1 and the hammer 100 are power tools for performing chipping work or the like on a workpiece. The hammer 1 includes a hammer body 10 as a working machine main body and a dust collector 70, and the hammer 100 includes a hammer body 110 as a working machine main body and a dust collector 70. That is, the dust collector 70 is a common device used for the hammer 1 and the hammer 100. The dust collector 70 is attached to the hammer body 10 (hammer body 110), and dust generated during chipping work is sucked by the dust collector 70. Hereinafter, the hammer body 10 and the hammer body 110 will be described first, and then the dust collector 70 will be described.

[0025] (Regarding the hammer body 10) As shown in FIGS. 1 and 2, the hammer body 10 includes a housing 20, a motor 30, and a transmission mechanism 40 that transmits the driving force of the motor 30 to a bit 60 as a tip tool.

[0026] (Regarding the housing 20) The housing 20 constitutes the outer shell of the hammer body 10. The housing 20 includes a main body housing 21 that constitutes the front part of the housing 20 and a handle housing 22 that constitutes the rear part of the housing 20. The main body housing 21 and the handle housing 22 are each constituted by a plurality of housing members.

[0027] The main body housing 21 is formed in a substantially reverse L shape when viewed from the right side. The handle housing 22 extends in the vertical direction, and the upper and lower end portions of the handle housing 22 are bent forward and connected to the rear end portion of the main body housing 21. Specifically, the front end portion at the upper end of the handle housing 22 is connected to the upper end portion of the main body housing 21 by an upper connecting mechanism 23 so as to be relatively movable in the front-rear direction. Also, the lower end portion of the handle housing 22 is connected by a lower connecting mechanism 24 so as to be rotatable about the left-right direction as the axial direction.

[0028] The vertically extending portion of the handle housing 22 is a grip portion 22A that an operator grips. A trigger 25 is provided at the upper end of the grip portion 22A. The trigger 25 protrudes forward from the handle housing 22 and is configured to be operable to be pulled rearward. A switch 26 is provided on the rear side of the trigger 25 in the grip portion 22A. The switch 26 is electrically connected to a controller 27 provided at the lower end of the main body housing 21 and outputs an output signal corresponding to the operation state of the trigger 25 to the controller 27. A battery pack 28 is attached to the lower end portion of the handle housing 22, and power is supplied from the battery pack 28 to a motor 30 and a controller 27 described later.

[0029] (Regarding the motor 30) The motor 30 is a brushless motor and is housed inside the lower part of the rear portion of the main body housing 21. The motor 30 is electrically connected to the controller 27. The motor 30 has an output shaft 30A with the vertical direction as the axial direction. The lower end portion of the output shaft 30A is rotatably supported by a motor bearing 31 fixed to the main body housing 21, and the upper end side portion of the output shaft 30A is rotatably supported by a motor bearing 32 held at the lower end portion of an inner case 41 in a transmission mechanism 40 described later. A pinion gear 30B is formed at the upper end portion of the output shaft 30A.

[0030] (Regarding the transmission mechanism 40) The transmission mechanism 40 includes an inner case 41, a crank mechanism 42, and a transmission portion 46, and is housed inside the upper portion of the main body housing 21.

[0031] The inner case 41 is formed in a substantially bottomed elliptical cylinder shape that is open to the front side. The inner case 41 is disposed above the motor 30 so as to partition the rear end portion of the upper portion of the main body housing 21 in the front - rear direction. A motor bearing 32 is held at the lower end portion of the inner case 41, and the pinion gear 30B of the motor 30 supported by the motor bearing 32 is disposed inside the inner case 41.

[0032] The crank mechanism 42 includes a gear 43, a crankshaft 44 that is integrally rotatable with the center portion of the gear 43, and a connecting rod 45. The gear 43 meshes with the pinion gear 30B of the motor 30 on the rear side of the pinion gear 30B, and the crankshaft 44 is rotatably supported by the inner case 41. A large - diameter portion that projects radially outward is formed at the upper end portion of the crankshaft 44, and a crank pin 44A is provided on the large - diameter portion. The crank pin 44A is disposed at a position eccentric with respect to the rotation axis of the crankshaft 44. The connecting rod 45 extends in the front - rear direction, and the rear end portion of the connecting rod 45 is rotatably connected to the crank pin 44A with the vertical direction as the axial direction.

[0033] The transmission unit 46 includes a cylinder 47, a piston 48, a striker 49, an intermediate member 50, and a tool attachment portion 51. The cylinder 47 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction. The piston 48 is disposed inside the rear portion of the cylinder 47, and the front end portion of the connecting rod 45 is rotatably connected to the piston 48 with the vertical direction as the axial direction. The striker 49 is accommodated in the cylinder 47 on the front side of the piston 48, and the intermediate member 50 is accommodated inside the cylinder 47 on the front side of the striker 49. The piston 48, the striker 49, and the intermediate member 50 are configured to be movable back and forth in the cylinder 47. Further, an air chamber 52 is formed between the piston 48 and the striker 49 in the cylinder 47. A bit 60 is attached to the tool attachment portion 51, and the bit 60 extends forward from the tool attachment portion 51.

[0034] Thus, when the motor 30 is driven, the rotational motion of the gear 43 is converted into the reciprocating motion in the front-rear direction of the piston 48 by the crank mechanism 42, and the impact force in the front-rear direction by the transmission unit 46 is applied to the bit 60.

[0035] (Regarding the hammer body 110) As shown in Fig. 3, the hammer body 110 extends in the front-rear direction as a whole, and the size of the hammer body 110 is larger than that of the hammer body 10. The hammer body 110 is configured in the same manner as the hammer body 10. That is, the hammer body 110 has a housing 120 that constitutes the outer contour of the hammer body 110. The housing 120 includes a main body housing 121 that constitutes the front portion of the housing 120 and a handle housing 122 that constitutes the rear end portion of the housing 120. A trigger 125 is provided on the handle housing 122 so that it can be pulled. The internal mechanism of the hammer body 110 is configured in the same manner as that of the hammer body 10. Therefore, the description of the internal mechanism of the hammer body 110 is omitted. Also, in the hammer body 110, instead of the battery pack 28, a cord 152 extends downward from the lower end portion of the handle housing 122, and electric power is supplied from a commercial power source to the controller through the cord 152. And a bit 160 as a tip tool extends forward from the front end portion of the main body housing 121. Also, the thickness of the bit 160 is thicker than that of the bit 60 of the hammer 1. Thus, according to the work form, the operator can select the hammer 1 or the hammer 100.

[0036] (Regarding the dust collector 70) As shown in Figs. 1 and 3, the dust collector 70 has a nozzle 72 and a hose 90, and the nozzle 72 is connected to a dust collector (not shown) by the hose 90. Also, the nozzle 72 is attached to the bit 60 (bit 160) of the hammer body 10 (hammer body 110), sucks the dust generated around the bit 60 (bit 160) during chiseling, and sends the dust to the dust collector through the hose 90. Also, the dust collector 70 has a hose holder 84, and the hose 90 is attached to the hammer body 10 (hammer body 110) by the hose holder 84. Hereinafter, each component of the dust collector 70 will be described.

[0037] (Regarding the nozzle 72) As shown in FIGS. 4 and 5, the nozzle 72 is composed of a nozzle body 74 and a spacer 80 as an inner cylinder. The nozzle body 74 has a suction portion 76 and a nozzle mounting portion 78 as an outer cylinder, and the spacer 80 is detachably mounted on the nozzle mounting portion 78. The spacer 80 and the nozzle mounting portion 78 correspond to the tool insertion portion 77 of the present invention.

[0038] As described above, the nozzle 72 is attached to the bit 60 (bit 160) of the hammer body 10 (hammer body 110). Specifically, as shown in FIG. 7(A), in the hammer 1, the tool insertion portion 77 of the nozzle 72 with the spacer 80 mounted on the nozzle mounting portion 78 is attached to the bit 60. On the other hand, as shown in FIG. 7(B), in the hammer 100, the tool insertion portion 77 of the nozzle 72 with the spacer 80 removed from the nozzle mounting portion 78 is attached to the bit 160. That is, the spacer 80 is attached and detached to / from the nozzle mounting portion 78 according to the thickness of the bit. Hereinafter, the nozzle 72 will be described with reference to FIGS. 4 and 5. In FIG. 5(B), the axis AL1 of the bit 160 in the hammer 100 is illustrated.

[0039] The nozzle body 74 is made of an elastic material such as rubber. The suction portion 76 is generally formed in a substantially bottomed cylindrical shape open to the front side. The rear wall 76A of the suction portion 76 is inclined forward as it goes to the left when viewed from above, and the rear part of the peripheral wall of the suction portion 76 is inclined inward of the suction portion 76 and connected to the edge of the rear wall 76A. The front opening end face 76B of the suction portion 76 is inclined forward as it goes to the left when viewed from above, similar to the rear wall 76A. As a result, when viewed from above, the opening end face 76B of the suction portion 76 is inclined with respect to the machining surface SF as an orthogonal plane orthogonal to the axis AL1. Also, when the front end 76C of the suction portion 76 (opening end face 76B) abuts against the machining surface SF, a gap G is formed between the opening end face 76B and the machining surface SF (see FIG. 5(B)).

[0040] At the right end of the rear wall 76A in the suction part 76, a hose attachment part 76D is provided. The hose attachment part 76D is formed in a substantially cylindrical shape and extends obliquely rearward to the right from the suction part 76. The inside of the hose attachment part 76D communicates with the inside of the suction part 76. At the hose attachment part 76D, the front end part of a substantially cylindrical adapter 82 (see FIGS. 1 and 3) is attached. And the front end part of the hose 90 is attached to the rear end part of the adapter 82, and the hose 90 extends rearward from the adapter 82.

[0041] The nozzle attachment part 78 is formed in a cylindrical shape with the front-rear direction as the axial direction and extends rearward from the rear wall 76A of the nozzle body 74. The inside of the nozzle attachment part 78 is an outer attachment hole 78A, and the axis AL2 of the outer attachment hole 78A extends along the front-rear direction and coincides with the axis AL1 of the bit 160. The front end part of the nozzle attachment part 78 protrudes forward from the rear wall 76A of the suction part 76 and is disposed inside the suction part 76.

[0042] At the front end part of the outer attachment hole 78A, a stopper part 78B as a regulating part protruding radially inward is formed. The stopper part 78B extends along the circumferential direction of the outer attachment hole 78A. The rear surface of the stopper part 78B extends along a plane orthogonal to the axis AL2. And the space behind the stopper part 78B in the outer attachment hole 78A is a spacer accommodating part 78C for accommodating a spacer 80 described later.

[0043] On the inner peripheral surface of the rear end portion in the spacer housing portion 78C, a retaining portion 78D protruding radially inward is formed. The retaining portion 78D extends along the circumferential direction of the nozzle mounting portion 78. At the lower part of the inner peripheral portion of the retaining portion 78D, an inclined surface 78E is formed. The inclined surface 78E is inclined radially outward of the nozzle mounting portion 78 as it goes toward the front side, and the front end of the inclined surface 78E is connected to the inner peripheral surface of the outer mounting hole 78A. In the retaining portion 78D, positioning grooves 78F1 and 78F2 serving as a pair of engaging portions penetrating in the vertical direction are formed. The positioning groove 78F1 is formed at the right end portion of the retaining portion 78D, and the positioning groove 78F2 is arranged at a position 90 degrees counterclockwise away from the positioning groove 78F1 when viewed from the rear side. Also, the groove width of the positioning groove 78F2 is set wider than the groove width of the positioning groove 78F1.

[0044] The spacer 80 is made of resin. The spacer 80 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction as a whole. And the spacer 80 is housed in the spacer housing portion 78C of the nozzle mounting portion 78 from above and is mounted on the nozzle mounting portion 78. In the state where the spacer 80 is mounted on the nozzle mounting portion 78, the spacer 80 is disposed adjacent to the front side of the stopper portion 78B, and the movement of the spacer 80 toward the front side is restricted by the stopper portion 78B. Also, at the rear end portion of the outer peripheral portion of the spacer 80, a chamfered portion 80A corresponding to the inclined surface 78E of the retaining portion 78D is formed, and the chamfered portion 80A and the retaining portion 78D are engaged in the front-rear direction, and the housing state of the spacer 80 in the spacer housing portion 78C is maintained. On the other hand, when removing the spacer 80 from the nozzle mounting portion 78, the rear end portion of the nozzle mounting portion 78 is elastically deformed radially outward to release the engagement state between the retaining portion 78D and the chamfered portion 80A, so that the spacer 80 can be removed from the nozzle mounting portion 78 toward the rear side.

[0045] The interior of the spacer 80 is provided with an inner mounting hole 80B. When viewed from above, the penetrating direction of the inner mounting hole 80B is inclined with respect to the front-rear direction. Specifically, when viewed from above, the axis AL3 of the inner mounting hole 80B extends along a direction that inclines to the left as it goes forward with respect to the axis AL2 of the outer mounting hole 78A of the nozzle mounting portion 78, and the axis AL2 and the axis AL3 intersect at the middle portion in the front-rear direction of the inner mounting hole 80B (see Fig. 5(B)).

[0046] On the inner peripheral surface of the inner mounting hole 80B of the spacer 80, a plurality of inner peripheral grooves 80C extending in the penetrating direction of the inner mounting hole 80B are formed, and the inner peripheral grooves 80C are arranged at equal intervals in the circumferential direction of the spacer 80. Thereby, in a state where the bit 60 is inserted into the inner mounting hole 80B, the contact area between the bit 60 and the inner mounting hole 80B is set to be small.

[0047] Also, on the outer peripheral portion of the spacer 80, positioning ribs 80D1 and 80D2 as a pair of engaged portions extending in the front-rear direction are formed, and the pair of positioning ribs 80D1 and 80D2 correspond to the positioning grooves 78F1 and 78F2 of the nozzle mounting portion 78. That is, the positioning rib 80D1 is formed at the right end portion of the outer peripheral portion of the spacer 80, and the positioning rib 80D2 is arranged at a position 90 degrees counterclockwise away from the positioning rib 80D1 when viewed from the rear side. Also, the width dimension of the positioning rib 80D2 is set to be larger than the groove dimension of the positioning rib 80D1. In a state where the spacer 80 is attached to the nozzle mounting portion 78, the positioning rib 80D1 is inserted into the positioning groove 78F1, and the positioning rib 80D1 and the positioning groove 78F1 are engaged in the circumferential direction of the nozzle mounting portion 78. Also, the positioning rib 80D2 is inserted into the positioning groove 78F2, and the positioning rib 80D2 and the positioning groove 78F2 are engaged in the circumferential direction of the nozzle mounting portion 78. Thereby, a configuration is provided in which relative rotation about the front-rear direction as the axial direction with respect to the nozzle body 74 of the spacer 80 is restricted.

[0048] (Regarding the hose holder 84) As shown in FIGS. 6(A) and 6(B), the hose holder 84 is configured as a holder that attaches the hose 90 to the hammer body 10 (hammer body 110) and holds the hose 90 on the right side of the hammer body 10 (hammer body 110). FIGS. 6(A) and 6(B) illustrate an example in which the hose 90 is attached to the hammer body 10. Further, the holder member 86 is configured to be able to hold hoses 90 having different thicknesses in the hose holding groove 87. Hereinafter, for the purpose of distinguishing hoses having different thicknesses, the thin hose 90 is described as hose 90-1, and the thick hose 90 is described as hose 90-2.

[0049] The hose holder 84 includes a holder member 86 as a holder and a band 88. The holder member 86 is formed in a substantially inverted L-shaped block shape with the front-rear direction as the thickness direction when viewed from the front side. A main body mounting groove 86A is formed on the left side surface of the holder member 86, and the main body mounting groove 86A is formed in a substantially V-shaped groove shape that is open to the left when viewed from the front side.

[0050] A hose holding groove 87 is formed on the right side surface of the holder member 86, and the hose holding groove 87 is formed in a substantially U-shaped shape that is open to the right when viewed from the front side. Specifically, the hose holding groove 87 has a pair of upper and lower side surfaces 87A, an upper inclined bottom surface 87B1 as an inclined bottom surface extending obliquely downward to the left from the left end of the upper side surface 87A, and a lower inclined bottom surface 87B2 as an inclined bottom surface extending obliquely upward to the left from the left end of the lower side surface 87A, and the lower end of the upper inclined bottom surface 87B1 and the upper end of the lower inclined bottom surface 87B2 are connected. That is, the bottom surface 87B of the hose holding groove 87 is constituted by the upper inclined bottom surface 87B1 and the lower inclined bottom surface 87B2, and is formed in a substantially V-shaped shape that is open to the right when viewed from the front side. Further, the angle between the upper inclined bottom surface 87B1 and the lower inclined bottom surface 87B2 is set to an obtuse angle. Furthermore, the side surfaces 87A are inclined in a direction away from each other as they go in the opening direction of the hose holding groove 87.

[0051] As described above, in the holder member 86, the hose holding grooves 87 are configured to be able to hold hoses 90 having different thicknesses. Before being wound by the band 88 described later, the groove depth of the hose holding groove 87 is set so that the hoses 90-1 and 90-2 protrude outward (right side) from the opening of the hose holding groove 87. More specifically, approximately half of the hose 90-2 is set to protrude outside the hose holding groove 87. Further, before being wound by the band 88, the groove width and groove depth of the hose holding groove 87 are set so that the outer peripheral portions of the hoses 90-1 and 90-2 are in contact with the upper inclined bottom surface 87B1 and the lower inclined bottom surface 87B2 and not in contact with the side surface 87A.

[0052] On the left part of the lower surface of the holder member 86, a stepped surface 86B that rises one step upward is formed. Further, in the holder member 86, a pair of upper and lower band pins 86C are formed. The upper band pin 86C protrudes upward from the upper surface of the holder member 86, and the lower band pin 86C protrudes downward from the stepped surface 86B.

[0053] As also shown in FIGS. 1 and 3, the band 88 is formed in a substantially long strip shape. A plurality of fixing holes 88A are formed in the band 88, and the fixing holes 88A are arranged at predetermined intervals along the longitudinal direction of the band 88. The lower band pin 86C is inserted into the fixing hole 88A formed at one end of the band 88, and one end of the band 88 is fixed to the holder member 86 below the stepped surface 86B.

[0054] Then, the holder member 86 is disposed on the right side of the front portion of the main body housing 21 (main body housing 121) of the hammer main body 10 (hammer main body 110). The band 88 is wound around the front portion of the main body housing 21 (main body housing 121), and the upper band pin 86C is inserted into the fixing hole 88A of the band 88. Thereby, the main body housing 21 (main body housing 121) is tightened by the holder member 86 and the band 88, and the holder member 86 is attached to the hammer main body 10 (hammer main body 110). Further, the hose 90-1 (hose 90-2) is disposed in the hose holding groove 87. The band 88 is wound around the hose 90-1 (hose 90-2), and the lower band pin 86C is inserted into the fixing hole 88A of the band 88. Thereby, the hose 90-1 (hose 90-2) is tightened by the holder member 86 and the band 88 and is held by the hose holder 84.

[0055] (Function and Effect) As shown in FIG. 7(B), when the dust collecting device 70 is used for the hammer 100, the spacer 80 is removed from the nozzle mounting portion 78 at the nozzle 72. That is, the tool insertion portion 77 is constituted only by the nozzle mounting portion 78. Then, the nozzle 72 from which the spacer 80 has been removed is attached to the bit 160. Specifically, the bit 160 is inserted into the outer mounting hole 78A of the nozzle mounting portion 78 from the rear side. Thereby, the nozzle 72 is attached to the bit 160 so that the nozzle mounting portion 78 is disposed coaxially with the bit 160. Then, the front end 76C of the suction portion 76 in the nozzle 72 is brought into contact with the machining surface SF of the workpiece, and the chipping process is performed on the workpiece by the bit 160 to which the impact force is applied. Further, during the chipping process, by operating the dust collector, air is sucked into the suction portion 76 from the gap G between the machining surface SF and the opening end surface 76B of the suction portion 76, and the dust generated around the bit 160 is sucked into the suction portion 76 together with the air.

[0056] On the one hand, as shown in FIG. 7(A), when the dust collector 70 is used as the hammer 1, the spacer 80 is attached to the nozzle attachment portion 78 at the nozzle 72. That is, the tool insertion portion 77 is composed of the nozzle attachment portion 78 and the spacer 80. Then, the nozzle 72 with the spacer 80 attached is attached to the bit 60. Specifically, the bit 60 is inserted into the inner attachment hole 80B of the spacer 80 from the rear side. Thereby, the nozzle 72 is attached to the bit 60 so that the axis AL1 of the bit 60 coincides with the axis AL3 of the inner attachment hole 80B.

[0057] Here, when viewed from above, the axis AL2 of the outer attachment hole 78A intersects the axis AL3 of the inner attachment hole 80B. Specifically, when the axis AL2 is along the front-rear direction, the axis AL3 is inclined to the left as it goes forward with respect to the axis AL2 (see FIG. 5(B)). For this reason, in the hammer 1, compared with the hammer 100, the front end 76C of the nozzle body 74 is displaced in the direction approaching the bit 60 (axis AL1 thereof), and the relative angle of the suction portion 76 with respect to the axis AL1 is changed. That is, the posture of the suction portion 76 as viewed from above is changed so that the suction portion 76 tilts toward the axis AL1 side. In other words, the dimension of the gap G in the front-rear direction becomes larger. Then, in the same manner as above, the front end 76C of the suction portion 76 in the nozzle 72 is brought into contact with the machining surface SF of the workpiece, and the workpiece is chipped by the bit 160 to which the impact force is applied.

[0058] As described above, in the dust collector 70, the nozzle 72 has a tool insertion portion 77 through which the bit 60 (bit 160) is inserted, and a suction portion 76 connected to the tool insertion portion 77. Further, the tool insertion portion 77 includes a nozzle attachment portion 78 connected to the suction portion 76, and a spacer 80 detachably attached to the nozzle attachment portion 78. Here, the tool insertion portion 77 is connected to the suction portion 76 so that the relative angle of the suction portion 76 with respect to the axis AL1 of the bit 60 (bit 160) as viewed from above can be changed. Specifically, according to the bits 60 and 160 having different thicknesses, the spacer 80 is detached from and attached to the nozzle attachment portion 78 to change the form of the tool insertion portion 77, thereby changing the relative angle of the suction portion 76 with respect to the axes AL1 of the bits 60 and 160 as viewed from above. More specifically, as described above, in the hammer 100 using the thick bit 160, the tool insertion portion 77 in a state where the spacer 80 is removed is attached to the bit 160, and in the hammer 1 using the thin bit 60, the tool insertion portion 77 in a state where the spacer 80 is attached is attached to the bit 60, whereby the relative angle of the suction portion 76 with respect to the axis AL1 as viewed from above is changed. In other words, in the hammer 1 and the hammer 100, the angles of the opening end surface 76B of the suction portion 76 with respect to the processing surface SF are different angles. Therefore, in the hammer 1 and the hammer 100, by appropriately setting the relative angle of the suction portion 76 with respect to the axis AL1, the posture of the suction portion 76 can be made into a posture suitable for each hammer. For this reason, by selecting either the hammer 1 or the hammer 100 according to the working mode, dust can be sucked using the suction portion 76 arranged in a posture suitable for the processing surface SF. As described above, the workability in the dust collector 70 can be improved.

[0059] Also, as described above, in the nozzle 72, by attaching and detaching the spacer 80 to and from the nozzle attachment portion 78 according to the bits 60 and 160 having different thicknesses, the relative angle of the suction portion 76 with respect to the axis AL1 of the bits 60 and 160, as viewed from above, is changed. Therefore, it is not necessary to prepare two types of nozzles 72 according to the bits 60 and 160 having different thicknesses. As a result, the nozzle 72 can be made a common component for the hammer 1 and the hammer 100. Therefore, the convenience of the dust collecting device 70 can be improved.

[0060] Also, as viewed from above, the axis AL2 of the outer attachment hole 78A in the nozzle attachment portion 78 and the axis AL3 of the inner attachment hole 80B in the spacer 80 intersect. Therefore, by attaching and detaching the spacer 80 to and from the nozzle attachment portion 78, the nozzle 72 can be easily changed to the hammer 1 specification or the hammer 100 specification. Further, by appropriately setting the inclination angle of the axis AL3 with respect to the axis AL2, the posture of the suction portion 76 can be easily optimized in the hammer 1.

[0061] Also, when viewed from above, in a state where the axis AL2 of the outer mounting hole 78A extends along the front-rear direction, the axis AL3 of the inner mounting hole 80B inclines leftward as it goes forward with respect to the axis AL2. For this reason, when the nozzle 72 is attached to the bit 60 of the hammer 1, the front end 76C of the nozzle body 74 is displaced in a direction approaching the bit 60 as compared with when the nozzle 72 is attached to the bit 160 of the hammer 100. In other words, the angle of the opening end surface 76B of the suction portion 76 with respect to the processing surface SF increases. Thereby, during the chipping process of the hammer 1, the field of view on the tip side of the bit 60 becomes wider as compared with the chipping process of the hammer 100. As a result, the contact position of the tip of the bit 60 with the workpiece can be confirmed well. Therefore, for example, it is effective for chipping operations where the hammer 1 chips a wall surface over a relatively wide range. Also, in the hammer 1, since the front end 76C of the nozzle body 74 is displaced in a direction approaching the bit 60 as compared with the hammer 100, the hose attachment portion 76D is also displaced toward the hammer body 10 side. For this reason, the hose 90 attached to the hose attachment portion 76D via the adapter 82 can be arranged closer to the hammer body 10 side. From this point as well, the workability of the hammer 1 can be improved.

[0062] Also, a pair of positioning grooves 78F1 and 78F2 are formed in the retaining portion 78D in the nozzle attachment portion 78, and a pair of positioning ribs 80D1 and 80D2 are provided on the outer peripheral portion of the spacer 80. Then, the positioning rib 80D1 is inserted into the positioning groove 78F1, and the positioning rib 80D2 is inserted into the positioning groove 78F2, and the positioning ribs 80D1 and 80D2 and the positioning grooves 78F1 and 78F2 are engaged in the circumferential direction of the nozzle attachment portion 78. Thereby, the relative rotation of the spacer 80 around the axis AL2 with respect to the nozzle attachment portion 78 can be restricted. Therefore, the mounting state of the spacer 80 to the nozzle attachment portion 78 can be maintained well.

[0063] In addition, at the front end of the outer mounting hole 78A of the nozzle mounting portion 78, a stopper portion 78B that protrudes radially outward is formed, and the stopper portion 78B extends along the circumferential direction of the nozzle mounting portion 78. In the state where the spacer 80 is accommodated in the spacer accommodating portion 78C of the nozzle mounting portion 78, the stopper portion 78B is disposed adjacent to the front side of the spacer 80, and the movement of the spacer 80 toward the front side is restricted by the stopper portion 78B. Thereby, the mounting state of the spacer 80 to the nozzle mounting portion 78 can be maintained favorably.

[0064] In addition, in the dust collector 70, a hose holding groove 87 is formed in the holder member 86 of the hose holder 84. The hose holding groove 87 is formed in a groove shape that is open to the right side and penetrates in the front-rear direction. The hose holding groove 87 is configured to be able to accommodate hoses 90-1 and 90-2 having different thicknesses. Specifically, the groove width of the hose holding groove 87 is set to be larger than the diameter of the hose 90-2. Further, the bottom surface 87B of the hose holding groove 87 is formed in a V shape that is open to the right side when viewed from the front side, and the outer peripheral portions of the hose 90-1 (hose 90-2) are in contact with the upper inclined bottom surface 87B1 and the lower inclined bottom surface 87B2 of the bottom surface 87B. For this reason, by winding the band 88 around the hose 90-1 (hose 90-2), the hose 90-1 (hose 90-2) disposed in the hose holding groove 87 is supported by the hose holder 84 and the band 88 at at least three points. Thereby, the hoses 90-1 and 90-2 having different thicknesses can be attached to the hammer body 10 (hammer body 110). Therefore, it is not necessary to prepare a hose holder for each hose having a different thickness. That is, the hose holder 84 can be made a common component of the hammer 1 and the hammer 100. Therefore, the convenience of the hose holder 84 can be improved.

[0065] Also, before the band 88 is wound around the hose 90-1 (hose 90-2), the hose 90-1 (hose 90-2) protrudes from the opening of the hose holding groove 87 and does not contact the pair of side surfaces 87A of the hose holding groove 87. Thereby, even when a relatively high winding force is applied from the band 88 to the hose 90-1 (hose 90-2), excessive crushing deformation of the hose 90-1 and the hose 90-2 can be suppressed.

[0066] That is, as shown in Fig. 8(A), when the hose 90-1 is wound with a relatively high winding force, the band 88 is in a state of being pulled at the pair of opening ends of the hose holding groove 87 so as to linearly close the opening of the hose holding groove 87. At this time, the portion of the hose 90-1 protruding from the hose holding groove 87 is crushed and deformed, but since the band 88 is supported by the pair of opening ends of the hose holding groove 87, the intrusion of the band 88 into the hose holding groove 87 is suppressed. Therefore, excessive crushing of the hose 90-1 can be suppressed.

[0067] Also, as shown in Fig. 8(B), when the hose 90-2 is wound with a relatively high winding force, the hose 90-2 deforms so as to expand outward in the groove width direction of the hose holding groove 87 and contacts the side surface 87A of the hose holding groove 87. Thereby, the reaction force from the holder member 86 to the hose 90-2 due to the winding force acts from the pair of side surfaces 87A, the upper inclined bottom surface 87B1, and the lower inclined bottom surface 87B2. Therefore, the reaction force acting from the holder member 86 to the hose 90-2 is dispersed. Therefore, excessive crushing of the hose 90-2 can be suppressed.

[0068] In the nozzle 72 of the present embodiment, the relative angle of the suction portion 76 with respect to the axis AL1 of the bit 60 (bit 160) is configured to be changed by changing the form of the tool insertion portion 77 according to the thicknesses of the bit 60 and the bit 160. However, the relative angle of the suction portion 76 with respect to the axis AL1 of the bit 60 may be changed by changing the form of the tool insertion portion 77 in the bit 60. Specifically, in the tool insertion portion 77, the posture of the suction portion 76 with respect to the machining surface SF may be changed by replacing the spacer 80 with a spacer 92 having a different form.

[0069] Hereinafter, the spacer 92 will be described with reference to FIG. 9. In FIG. 9, the same reference numerals are given to the portions having the same configuration as the spacer 80. In the spacer 92, the inner mounting hole 80B penetrates in the front-rear direction, and in a state where the spacer 92 is mounted in the spacer housing portion 78C of the nozzle mounting portion 78, the axis AL2 of the outer mounting hole 78A of the nozzle mounting portion 78 and the axis AL3 of the inner mounting hole 80B coincide with each other.

[0070] Thereby, in the operation using the hammer 1, by replacing the spacer 80 of the nozzle 72 with the spacer 92, the relative angle of the suction portion 76 with respect to the bit 60 can be changed when viewed from above. That is, in the hammer 1, the posture of the suction portion 76 with respect to the machining surface SF can be changed according to the operation mode. Therefore, the workability of the hammer 1 can be improved.

[0071] In the example shown in FIG. 9, in the hammer 1, the relative angle of the suction portion 76 with respect to the bit 60 is changed by attaching and detaching spacers 80 or 92 of different forms to the nozzle attachment portion 78. However, the structure for changing the relative angle of the suction portion 76 with respect to the bit 60 in the hammer 1 is not limited to this. For example, as shown in FIGS. 10(A) and 10(B), the spacer 80 is connected to the nozzle attachment portion 78 so that the relative angle can be changed by rotating it about a rotation axis 81 extending in the vertical direction, and after the relative rotation of the spacer 80 with respect to the nozzle attachment portion 78, the spacer 80 may be configured to be held. Thereby, by relatively rotating the spacer 80 with respect to the nozzle attachment portion 78, the relative angle of the suction portion 76 with respect to the bit 60 can be changed when viewed from above (see the spacer 80 shown by the two-dot chain line in FIG. 10(B)).

[0072] Furthermore, the structure for changing the relative angle of the suction portion 76 with respect to the bit 60 shown in FIGS. 10(A) and 10(B) may be applied to other dust collection devices. For example, as shown in FIG. 11, the above-described changing structure may be applied to a hammer drill 200 as a working machine. Hereinafter, the hammer drill 200 will be briefly described. In the example of the hammer drill 200 shown in FIG. 11, the front-rear direction corresponds to the first direction of the present invention, and the left-right direction corresponds to the second direction of the present invention.

[0073] The hammer drill 200 includes a hammer drill body 210 as a working machine body and a dust collection device 270. The hammer drill body 210 has a housing 220 that constitutes the outer shell of the hammer drill body 210. The front portion of the housing 220 is a main body housing 221, and the rear end portion of the housing 220 is a handle housing 222. The hammer drill body 210 has a drill 260 as a tip tool, and the drill 260 projects forward from the front end portion of the main body housing 221. When the hammer drill body 210 operates, the drill 260 rotates.

[0074] Further, the dust collector 270 is attached to the hammer drill body 210. The dust collector 270 includes a nozzle 272, a hose 290, and a cyclone section 292, and the cyclone section 292 communicates with the inside of the hammer drill body 210. The nozzle 272 has a tool insertion portion 277 through which the drill 260 is inserted, and the tool insertion portion 277 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction. A hose attachment portion 276D extends downward from the tool insertion portion 277, and the front end portion of the hose 290 is connected to the lower end portion of the hose attachment portion 276D. The tool insertion portion 277 and the cyclone section 292 are communicated with each other by the hose 290. A suction portion 280 is provided inside the tool insertion portion 277. The suction portion 280 is formed in a substantially cylindrical shape with the front-rear direction as the axial direction, and the drill 260 is inserted through the suction portion 280. The suction portion 280 is rotatably connected to the tool insertion portion 277 by a connecting pin 281 with the left-right direction as the axial direction.

[0075] When the hammer drill 200 is in operation, an air flow is generated by the fan 229 that rotates driven by the motor 230, and the air flow sucks the dust around the drill 260. Also in this hammer drill 200, the suction portion 280 is rotated with respect to the tool insertion portion 277 (see the arrow in FIG. 11), and by holding the rotated suction portion 280, the relative angle of the suction portion 280 with respect to the drill 260 as viewed from the left-right direction can be changed.

[0076] The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof. For example, in FIGS. 10(A) and (B), the spacer 80 rotates about the rotation axis 81 with respect to the nozzle attachment portion 78 as the outer cylinder, but any configuration may be used as long as the relative angle of the spacer 80 with respect to the nozzle attachment portion 78 is changed. For example, a plurality of hole portions may be formed in the nozzle attachment portion 78, and the spacer 80 may be insertable at different relative angles. Further, in the above-described embodiment, the nozzle attachment portion 78 (or the spacer 80) has a structure provided with mounting holes at a predetermined single angle, but for example, a structure in which guide grooves at a plurality of angles overlap as a tool insertion portion may be used. According to this, by changing the angle at which the tip tool is inserted, it is possible to change the angle of the suction portion with respect to the tip tool. Further, in the above-described embodiment, the dust collecting device is structured to be attached to a hammer or a hammer drill as the work machine body, but it is not limited to these as long as it is a work machine that requires dust collection.

Explanation of Signs

[0077] 1 Hammer (Work Machine) 10 Hammer Body (Work Machine Body) 60 Bit (Tip Tool) 70 Dust Collecting Device 76 Suction Portion 76B Opening End Face 77 Tool Insertion Portion 78 Nozzle Attachment Portion (Outer Cylinder) 78A Outer Mounting Hole 78B Stopper Portion (Regulating Portion) 78F1 Positioning Groove (Engaging Portion) 78F2 Positioning Groove (Engaging Portion) 80 Spacer (Inner Cylinder) 80B Inner Mounting Hole 80D1 Positioning Rib (Engaged Portion) 80D2 Positioning Rib (Engaged Portion) 86 Holder Member (Holder) 87 Hose Holding Groove 87A Side Face 87B Bottom Face 87B1 Upper inclined bottom surface (inclined bottom surface) 87B2 Lower inclined bottom surface (inclined bottom surface) 88 Band 90 Hose 92 Spacer (inner cylinder) 100 Hammer (working tool) 110 Hammer body (working tool body) 160 Bit (tip tool) 180 Spacer (inner cylinder) 200 Hammer drill (working tool) 210 Hammer drill body (working tool body) 260 Drill (tip tool) 270 Dust collector 277 Tool insertion part 280 Suction part AL1 Axis of tip tool AL2 Axis of outer mounting hole AL3 Axis of inner mounting hole 80B SF Machined surface (orthogonal surface)

Claims

1. A dust collecting device that is attached to a work machine main body and sucks dust around a tip tool that extends from the work machine main body to one side in a first direction, comprising: a cylindrical tool insertion portion through which the tip tool is inserted; a suction portion that is connected to the tool insertion portion, covers the tip tool, and is opened to one side in the first direction; and is provided with a dust collecting device in which, when viewed from a second direction orthogonal to the first direction, the tool insertion portion connects the suction portion such that the relative angle of the suction portion with respect to the axis of the tip tool can be changed.

2. The tool insertion portion an outer cylinder to which the suction portion is connected; an inner cylinder that is detachably mounted inside the outer cylinder and is attached to the tip tool; and is configured to include The dust collecting device according to claim 1, wherein the tip tool is inserted through the tool insertion portion in a state where the inner cylinder is removed from the outer cylinder or the tool insertion portion in a state where the inner cylinder is mounted on the outer cylinder according to the thickness of the tip tool, so that the relative angle of the suction portion with respect to the axis viewed from the second direction is changed.

3. The inside of the inner cylinder is an inner mounting hole attached to the tip tool, and the inside of the outer cylinder is an outer mounting hole attached to the tip tool. The dust collecting device according to claim 2, wherein, when viewed from the second direction, the axis of the outer mounting hole and the axis of the inner mounting hole intersect.

4. In a state where the tool insertion portion with the inner cylinder mounted on the outer cylinder is attached to the tip tool rather than in a state where the tool insertion portion with the inner cylinder removed from the outer cylinder is attached to the tip tool, the relative angle of the suction portion with respect to the axis is changed such that the angle of the opening end face of the suction portion with respect to an orthogonal plane orthogonal to the first direction increases when viewed from the second direction. The dust collecting device according to claim 3.

5. The tool insertion portion an outer cylinder to which the suction portion is connected; an inner cylinder that is detachably mounted inside the outer cylinder and is attached to the tip tool; and is configured to include The dust collecting device according to claim 1, wherein the relative angle of the suction portion with respect to the axis viewed from the second direction is changed by replacing the inner cylinder with a different form of the inner cylinder.

6. The inside of the inner cylinder is an inner mounting hole attached to the tip tool. The dust collecting device according to claim 5, wherein the tool insertion portion has a plurality of the inner cylinders in which the through direction of the inner mounting hole is different.

7. The tool insertion portion an outer cylinder connected to the suction portion An inner cylinder provided inside the outer cylinder and attached to the tip tool, which is configured to include, The dust collecting device according to claim 1, wherein the inner cylinder is connected to the outer cylinder so as to be able to change the relative angle with respect to the outer cylinder.

8. The dust collecting device according to claim 1, wherein the suction part is connected to the tool insertion part inside the tool insertion part so as to be able to change the relative angle with respect to the tool insertion part.

9. The outer cylinder is provided with an engaging part, and the inner cylinder is provided with an engaged part, The dust collecting device according to claim 2 or claim 5, wherein the engaged part is engaged with the engaging part in the circumferential direction of the outer cylinder.

10. The dust collecting device according to claim 2 or claim 5, wherein a restricting part for restricting the movement of the inner cylinder to one side in the first direction is formed on the outer cylinder.

11. A hose extending from the suction part, A holder attached to the work machine main body and having a hose holding groove in which the hose is arranged, A band fixed to the holder and winding the hose around the holder, comprising, The hose holding groove is formed in a groove shape opened to the side opposite to the work machine main body when viewed from the longitudinal direction of the hose, and the hose holding groove is configured to be able to arrange hoses having different thicknesses. The dust collecting device according to claim 1.

12. The bottom surface of the hose holding groove is formed in a V shape opened to the opening side of the hose holding groove when viewed from the longitudinal direction of the hose, and is composed of a pair of inclined bottom surfaces, The dust collecting device according to claim 11, wherein the hose holding groove is in contact with the pair of inclined bottom surfaces.

13. In the state before the hose is wound by the band, the hose protrudes from the opening of the hose holding groove and does not contact the pair of side surfaces of the hose holding groove. The dust collecting device according to claim 12.

14. A dust collecting device that is attached to a work machine main body and sucks dust around a tip tool that extends from the work machine main body to one side in a first direction, A cylindrical tool insertion part through which the tip tool is inserted, A suction part connected to the tool insertion part, covering the tip tool, and opened to one side in the first direction, comprising, When viewed from a second direction orthogonal to the first direction, the tip tool can select a first insertion angle and a second insertion angle different from the first insertion angle with respect to the suction part. The dust collecting device.

15. A work machine main body having a tip tool, The dust collector according to claim 1, A work machine comprising the same.

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