Dust collection accessory for electric tool and electric tool

Abstract

Provided is a dust collection attachment for an electric tool. Provided is a dust collection attachment which can be mechanically coupled to and electrically connected to a plurality of electric tools, even in a self-suction manner having a dust collection motor and a fan. A dust collection attachment (60) attachable to a first electric tool (1) is provided with: a housing (61); a suction unit (80); a dust collection unit (65) that captures dust sucked by the suction unit; a fan (94) for generating a suction force in the suction unit; a dust collection motor (92) that rotates the fan; and an adapter (200) that can be attached to at least a second electric tool (1A) and that can be detached from the housing, the adapter having: mechanical coupling parts (14A, 66A) that can be coupled to the housing and the second electric tool, and mechanical coupling parts (14A, 66A) that can be coupled to the mechanical coupling parts (14A, 66A); and an electrical connection part (205) which is coupled to the second electric tool and which electrically connects the dust collection attachment to the second electric tool.

Description

Technical Field

[0001] The present disclosure relates to a dust collection attachment mounted on an electric power tool in order to collect dust generated when the electric power tool is used, and to the electric power tool having the dust collection attachment mounted thereon. Background Art

[0002] When using an electric tool such as a hammer drill to process a workpiece such as concrete or stone, a dust collecting accessory is installed on the electric tool to prevent dust generated from the workpiece from scattering. The dust collecting accessory, as disclosed in Japanese Patent Gazette No. 2022-40593 (hereinafter referred to as Patent Document 1), has a suction section for sucking dust and a dust collecting section for storing the sucked dust. In the system of Patent Document 1, if a dust collecting device is installed on the electric tool, the dust collecting path in the dust collecting device is connected to the interior of the electric tool having a fan. Therefore, if the fan rotates along with the driving of the electric tool, the suction section of the dust collecting device generates a suction force, and the dust sucked in is collected by the dust collecting section.

[0003] In the system of Patent Document 1, the position and shape of the mounting portion of the dust collector differ for each power tool, so the dust collector needs to be manufactured for each power tool, which reduces the versatility of the dust collector. In view of this, a coupling connecting the dust collector and the power tool is inserted between them. The coupling allows a common dust collector to be installed for a plurality of power tools.

[0004] In the existing system, the power tool and the dust collection attachment are limited to mechanical connection. Therefore, when the dust collection attachment itself is a self-suction type with a dust collection motor and a fan, there is a problem that the signal transmission and power supply from the power tool to the dust collection attachment are not performed, and the adapter cannot be used. Summary of the invention

[0005] An object of the present disclosure is to provide a dust collecting attachment and an electric tool that can be mechanically coupled to and electrically connected to a plurality of electric tools even if the dust collecting attachment is a self-suction type having a dust collecting motor and a fan.

[0006] The first aspect of the present disclosure is a dust collection accessory for an electric tool, which can be installed on a first electric tool and comprises: a housing; a suction portion; a dust collection portion that captures dust sucked from the suction portion; a fan that generates a suction force in the suction portion; a dust collection motor that rotates the fan; and a connector that can be installed on at least a second electric tool and can be removed from the housing, and the connector comprises: a mechanical coupling portion that can be combined with the housing and the second electric tool; and an electrical connection portion that is combined with the second electric tool and electrically connects the dust collection accessory to the second electric tool.

[0007] A second aspect of the present disclosure is an electric tool (1) comprising: the electric tool dust collection attachment (60); and the adapter (200) to which the electric tool dust collection attachment (60) can be mounted.

[0008] According to the present disclosure, even if the dust collecting attachment is of a self-suction type having a dust collecting motor and a fan, it can be mechanically coupled to the electric power tool and the second electric power tool respectively, and can also be electrically connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a central longitudinal sectional view of a power tool dust collection system in which a power tool dust collection attachment is directly mounted on a hammer drill.

[0010] Figure 2 yes Figure 1 Enlarged cross-sectional view of line AA.

[0011] Figure 3 yes Figure 1 Enlarged view of the left half of the BB line.

[0012] Figure 4 This is a central longitudinal sectional view of a power tool dust collection system in which a power tool dust collection attachment with a connector is mounted on another hammer drill.

[0013] Figure 5 yes Figure 4 Enlarged cross-sectional view of line CC.

[0014] Figure 6 This is a central longitudinal sectional view of a dust collection system for an electric tool in which the dust collection attachment for an electric tool with a connector of Example 2 is mounted on another hammer drill.

[0015] Figure 7 yes Figure 6 Enlarged cross-sectional view of line DD.

[0016] Figure 8 This is a central longitudinal sectional view of a dust collection system for an electric tool in which the dust collection attachment for an electric tool with a connector of Example 3 is mounted on another hammer drill.

[0017] Description of Reference Numerals

[0018] 1. 1A-1C... hammer drill; 2... inner housing; 3... motor housing; 4... upper outer housing; 5... lower outer housing; 6... impact mechanism; 7... motor; 8... rotating shaft; 11... front barrel; 12... handle; 13... host side controller; 14... host side joint; 15... locking groove; 19... locking recess; 20... power cord; 21... main switch; 22... auxiliary switch; 24... main wire; 27... auxiliary wire; 29... female connector; 30... switch rod; 35... tool holder; 44... piston; 48... striker; 49... impact bolt; 51... lower housing; 52... host side battery assembly; 5 3...battery pack on the main machine side; 60...dust collection accessory; 61...housing; 62...main body; 65...dust collection box; 66...dust collection side joint; 71...hook plate; 78...male connector; 83...filter; 92...dust collection motor; 94...dust collection fan; 96...dust collection side controller; 97...signal wire; 101...battery pack; 103...power wire; 200, 200A, 200B...adapter; 201...vertical plate; 202...horizontal plate; 14A...front side joint; 15A...locking groove; 66A...rear side joint; 208...converter; B...drill; R...dust collection path; S...dust collection system for electric tools. DETAILED DESCRIPTION

[0019] Example 1

[0020] Hereinafter, embodiments of the present disclosure will be described based on the drawings.

[0021] Figure 1 The central longitudinal sectional view shows an example in which a dust collection system S for an electric power tool (hereinafter simply referred to as a “dust collection system”) is formed by directly attaching a dust collection attachment 60 to the hammer drill 1 without interposing an adapter described later.

[0022] First, the hammer drill 1 is described. The hammer drill (first electric tool) 1 has an inner housing 2, a motor housing 3, an upper outer housing 4, and a lower outer housing 5 as housings. The inner housing 2 accommodates an impact mechanism 6 extending in the front-rear direction. The motor housing 3 is connected to the lower side of the inner housing 2. The motor housing 3 accommodates a motor 7. The motor 7 is held in the motor housing 3 in a posture with the rotating shaft 8 facing upward. The upper part of the rotating shaft 8 is supported by a bearing 9 held by the inner housing 2. A pinion 10 provided at the upper end of the rotating shaft 8 protrudes into the inner housing 2.

[0023] The upper outer case 4 covers the outer side of the inner case 2 at the upper side of the motor case 3 .

[0024] The lower outer housing 5 has a front tube 11 and a handle 12. The front tube 11 covers the outer side of the motor housing 3 from below. On the rear side of the motor housing 3 and in the front tube 11, a host side controller 13 having a control circuit board (not shown) is accommodated in the up-down direction.

[0025] A main unit side joint portion 14 is formed on the front surface of the front cylinder portion 11 and in the center in the left-right direction. Figure 2 As shown, the main unit side coupling portion 14 is a protrusion that is T-shaped in cross section in the front, rear, left and right directions and extends in the up and down directions. A pair of retaining grooves 15 are formed on the left and right sides of the main unit side coupling portion 14. Each retaining groove 15 extends upward from the lower end of the front tube portion 11. A bottomed hole 16 with a front opening is formed in the main unit side coupling portion 14 and in the center in the left and right directions. The bottomed hole 16 extends in the front and rear directions. A ball portion 17 is accommodated in the bottomed hole 16. The opening diameter of the bottomed hole 16 is slightly smaller than the diameter of the ball portion 17. A coil spring 18 is accommodated behind the ball portion 17 and in the bottomed hole 16. The coil spring 18 applies force to the ball portion 17 so that the ball portion 17 is in a protruding position where it partially protrudes from the opening of the bottomed hole 16.

[0026] like Figure 3 As shown, locking recesses 19 for mounting the dust collecting attachment 60 are formed on the left and right side surfaces of the front cylinder portion 11. The locking recesses 19 extend in the front-rear direction.

[0027] The handle portion 12 extends rearward from the lower portion of the front tube portion 11 , and then extends upward to be connected to the rear end of the upper outer housing 4 .

[0028] A power cord 20 is connected to the lower part of the handle 12. The power cord 20 is electrically connected to the host controller 13. A main switch 21 and a sub-switch 22 are provided above the power cord 20 and in the handle 12. The main switch 21 causes the plunger 23 to protrude forward. A main wire 24 is connected to the main switch 21. The main wire 24 is electrically connected to the host controller 13. The main wire 24 inputs an on signal generated by the downward pressure of the plunger 23 to the host controller 13.

[0029] The sub switch 22 makes the plunger 25 protrude forward. The sub switch 22 has a rod 26 at the front. The sub lead 27 is connected to the sub switch 22. The sub lead 27 passes between the main switch 21 and the inner surface of the handle 12, and then is led downward in the handle 12.

[0030] A connection port 28 opening downward is provided on the lower surface of the front tube portion 11 of the lower outer case 5 and below the host controller 13. A female connector 29 is provided downward at the connection port 28. The sub-lead 27 is connected to the female connector 29.

[0031] A switch lever 30 is provided in front of the main switch 21 and the sub-switch 22. The switch lever 30 is provided on the handle 12 so as to be able to swing forward and backward with the lower end as the center. In a normal state, the plunger 23 of the main switch 21 abuts against the switch lever 30, and the switch lever 30 is in a protruding posture protruding forward from the handle 12. A pressing portion 31 is provided on the switch lever 30 above the abutting portion of the plunger 23 and located in front of the rod 26 of the sub-switch 22.

[0032] Therefore, when the switch lever 30 is pushed backward from the protruding position, the plunger 23 is pushed down to turn on the main switch 21, and the pressing portion 31 pushes down the plunger 25 via the rod 26 to turn on the sub-switch 22. However, by setting the length of the pressing portion 31, the sub-switch 22 is turned on earlier than the main switch 21.

[0033] The impact mechanism 6 has a tool holder 35. The tool holder 35 is held rotatably on the front side of the inner housing 2 and is in a cylindrical shape extending in the front-rear direction. An intermediate shaft 36 is supported in the inner housing 2 and on the front side of the rotating shaft 8. A crankshaft 37 is supported on the rear side of the rotating shaft 8. The intermediate shaft 36 and the crankshaft 37 extend in the up-down direction, respectively. A gear 38 is provided on the intermediate shaft 36. A gear 39 is provided on the crankshaft 37. The gear 38 and the gear 39 mesh with the pinion 10 of the rotating shaft 8. The intermediate shaft 36 has a first bevel gear 40 at the upper end.

[0034] A switching sleeve 41 is spline-coupled to the tool holder 35. A second bevel gear 42 is rotatably mounted behind the switching sleeve 41 and at the rear end of the tool holder 35. The second bevel gear 42 meshes with the first bevel gear 40 of the intermediate shaft 36. The switching sleeve 41 is engaged at the retracted position, so that the second bevel gear 42 transmits the rotation of the first bevel gear 40 to the tool holder 35. The front and rear positions of the switching sleeve 41 can be switched by a switching knob 56 provided on the rear surface of the upper outer housing 4.

[0035] A cylinder 43 is held in the rear portion of the inner housing 2. The cylinder 43 is coaxially inserted into the rear portion of the tool holder 35. A piston 44 is housed in the cylinder 43 so as to be movable forward and backward. An eccentric pin 45 is protrudingly provided on the upper portion of the crankshaft 37. The piston 44 and the eccentric pin 45 are connected by a connecting rod 46. A striker 48 is housed in the cylinder 43 and in front of the piston 44 via an air chamber 47 so as to be movable forward and backward. An impact bolt 49 is provided in front of the impactor 48 and in the tool holder 35. The impact bolt 49 is abutted against the drill bit B inserted into the front end of the tool holder 35. An operating sleeve 50 for performing a disassembly operation on the drill bit B is mounted on the front portion of the tool holder 35.

[0036] If the switch lever 30 is pressed down, the main switch 21 is turned on. If the main controller 13 receives the on signal of the main switch 21 via the main conductor 24, the main controller 13 supplies power to the motor 7 to rotate the rotating shaft 8. Then, the crankshaft 37 rotates, and the piston 44 moves forward and backward via the connecting rod 46. Therefore, the linked impactor 48 impacts the drill bit B via the impact bolt 49. If the switching sleeve 41 is switched to the retracted position by operating the switching knob 56, it becomes a hammer drill mode. In the hammer drill mode, rotation is transmitted from the intermediate shaft 36 to the tool holder 35 via the second bevel gear 42. If the switching sleeve 41 is switched to the forward position, it becomes an electric hammer mode. In the electric hammer mode, the tool holder 35 does not rotate but only impacts.

[0037] Next, the dust collecting attachment 60 will be described.

[0038] The dust collecting attachment 60 has a box-shaped housing 61. The housing 61 has a main body 62, a front protrusion 63, and a rear protrusion 64. The main body 62 extends in the up-down direction. The front protrusion 63 extends forward from the upper part of the main body 62. The dust collecting box 65 can be detached from the front side of the main body 62 and the lower side of the front protrusion 63. The rear protrusion 64 extends rearward from the lower part of the main body 62. The main body 62 and the rear protrusion 64 can be mounted on the hammer drill 1.

[0039] A pair of dust collecting side joints 66 are provided on the rear surface of the main body 62 and in the center in the left-right direction. The dust collecting side joints 66 are guide rails extending upward from the upper surface of the rear protrusion 64 and having an L-shaped cross section. Figure 2 As shown, the dust collecting side joint part 66 is locked with the locking groove 15 of the main unit side joint part 14 from below. In this locked state, the part of the main unit side joint part 14 that is closer to the front side than the locking groove 15 is located between the dust collecting side joint parts 66, and the front cylinder part 11 and the housing 61 are integrated in the front-to-back direction. A fitting recess 67 is formed on the rear surface of the main body 62. At the installation position of the dust collecting attachment 60, the ball part 17 is fitted with the fitting recess 67.

[0040] A pair of side plates 68 are provided on both sides from the rear surface of the main body 62 to the upper surface of the rear protruding portion 64. The front cylinder portion 11 of the hammer drill 1 can be fitted between the pair of side plates 68 from above.

[0041] A recess 70 extending in the vertical direction is formed on the outer surface of each side plate 68. The recess 70 accommodates a hook plate 71. The hook plate 71 is a strip plate that fits into the recess 70 and extends in the vertical direction. Figure 3As shown in FIG. 1 , the inner side of the middle portion of the hook plate 71 is coupled to the recess 70 in a manner that allows rotation about a shaft 72 extending in the front-rear direction. The lower portion of the hook plate 71 is pressed toward the left and right sides by a coil spring 73 provided between the hook plate 71 and the inner surface of the recess 70. Figure 3 As shown by the solid line in the middle, the upper portion is forced to the left and right inner sides, which is the locked position. A locking claw 74 protruding inward is provided at the upper end of the hook plate 71. In the locked position, the locking claw 74 passes through the through hole 75 provided in the recess 70 and protrudes inwardly toward the side plate 68. At the installation position of the dust collecting attachment 60 to the hammer drill 1, the locking claw 74 can be locked with the locking recess 19 of the front cylinder 11. If the lower portion of the hook plate 71 is pressed toward the recess 70, as shown in FIG. Figure 3 As shown by the two-dot chain line, the hook plate 71 tilts toward the lock release position. At the lock release position, the locking claw 74 is separated from the locking recess 19.

[0042] A receiving portion 76 is provided on the upper surface of the rear protrusion 64. At the installation position of the dust collecting accessory 60, the receiving portion 76 abuts against the lower surface of the front tube portion 11. A connecting tube 77 is provided behind the receiving portion 76 and on the upper surface of the rear protrusion 64 so as to protrude upward. The connecting tube 77 is located at the center of the left-right direction of the rear protrusion 64 and keeps the male connector 78 facing upward. At the installation position of the dust collecting accessory 60, the connecting tube 77 is connected to the connecting port 28 on the lower surface of the front tube portion 11. Then, the male connector 78 is connected to the female connector 29 of the connecting port 28.

[0043] The front protrusion 63 is provided with a duct 80. The front end (suction portion) of the duct 80 opens forward at the front surface of the front protrusion 63. The duct 80 is led backward in the front protrusion 63 and turns around in the main body 62. The lower end of the duct 80 opens at the front surface of the main body 62 below the front protrusion 63.

[0044] The dust box (dust collecting part) 65 is a box-shaped body that is mounted on the housing 61 from the front under the front protrusion 63. The dust box 65 is hingedly coupled to each other at the lower end by a cover 81 and a box body 82. The cover 81 has a filter 83 on the front inner surface. The box body 82 covers the filter 83 from the front.

[0045] A locking shaft 84 extending in the left-right direction is provided at the lower end of the front surface of the main body 62. A receiving recess 85 extending in the left-right direction is formed on the lower surface of the box body 82. The receiving recess 85 is engaged with the locking shaft 84, and the elastic piece 86 provided at the upper end of the cover body 81 is locked to the lower surface of the front protrusion 63, thereby, the dust box 65 is detachably assembled with respect to the housing 61. The cover body 81 has an inlet 87 on the upper side and an outlet 88 on the lower side. The inlet 87 is connected to the lower end of the pipeline 80. The outlet 88 is provided at the rear side of the filter 83.

[0046] A motor housing chamber 90 is partitioned and formed in the main body 62 behind the outlet 88. When the dust box 65 is installed, the outlet 88 contacts an opening 91 provided in front of the motor housing chamber 90 and is connected to the motor housing chamber 90.

[0047] A dust collecting motor 92 is housed in the motor housing chamber 90. The dust collecting motor 92 is held in a posture with the rotating shaft 93 facing downward. A dust collecting fan (fan) 94 is fixed to the rotating shaft 93. Exhaust ports (not shown) are formed on the left and right side surfaces of the main body 62, which are radially outward of the dust collecting fan 94.

[0048] The positive and negative wires 95 connected to the dust collecting motor 92 pass through the partition between the main body 62 and the rear protrusion 64 and are led out into the rear protrusion 64. A dust collecting side controller 96 having a control circuit substrate (not shown) is provided in the rear protrusion 64. The wires 95 are electrically connected to the dust collecting side controller 96. The dust collecting side controller 96 is electrically connected to the male connector 78 via a signal wire 97.

[0049] A battery assembly portion 100 is provided at the rear protruding portion 64. A battery pack 101 serving as a power source for the dust collection attachment 60 can be slidably assembled in the battery assembly portion 100 from the rear. A terminal block 102 is provided in the battery assembly portion 100. The terminal block 102 is electrically connected to the assembled battery pack 101. The terminal block 102 is electrically connected to the dust collection side controller 96 via a power source lead wire 103.

[0050] The dust collection side controller 96 is provided with a notification light 98. The notification light 98 is exposed on the side of the rear protrusion 64. The notification light 98 is, for example, an LED. If the battery pack 101 is mounted on the battery mounting portion 100, the dust collection side controller 96 monitors the voltage of the battery pack 101. If the voltage value of the battery pack 101 becomes less than a predetermined value, the dust collection side controller 96 lights or flashes the notification light 98 to notify that the voltage is low.

[0051] With the rear protrusion 64 positioned below the front barrel 11 of the hammer drill 1, the dust collection attachment 60 is moved vertically relative to the hammer drill 1 in such a manner that the retaining groove 15 of the main unit side coupling portion 14 and the dust collection side coupling portion 66 are vertically matched. In this way, the dust collection side coupling portion 66 is engaged with the retaining groove 15 from below.

[0052] At this time, the hook plate 71 of the side plate 68 interferes with the front cylinder 11 that moves relatively downward, and the hook plate 71 swings from the locked position to the unlocked position to allow the relative movement of the dust collecting accessory 60. Then, at the installation position of the dust collecting accessory 60, the locking claws 74 of each hook plate 71 that returns to the locked position are respectively locked in the locking recesses 19 of the front cylinder 11. Therefore, the downward movement of the dust collecting accessory 60 relative to the hammer drill 1 is restricted, and the installation of the dust collecting accessory 60 is completed. At this time, the ball portion 17 of the main unit side coupling portion 14 is engaged with the engaging recess 67 of the main body 62 at the installation position of the dust collecting accessory 60 to generate a click-giving effect, and presses the main body 62 to suppress the shaking of the coupled state.

[0053] At the same time as the dust collection attachment 60 is installed, the connection tube 77 of the rear protrusion 64 is connected to the connection port 28 of the front tube 11. As a result, the male connector 78 is connected to the female connector 29. Therefore, the sub-switch 22 is electrically connected to the dust collection side controller 96 via the sub-conductor 27 and the signal conductor 97.

[0054] The drill bit B mounted on the hammer drill 1 is a dust suction drill bit having a dust suction path with a suction port opened at the front end of the axis and a hose mounting portion (not shown) mounted on the outer periphery. Therefore, a flexible hose 105 is connected between the front end of the pipe 80 generating suction force in the dust collecting attachment 60 and the hose mounting portion.

[0055] Thus, a dust collection path R is formed for air to flow across the drill bit B and the dust collection attachment 60. Figure 1 As indicated by the dotted arrow, the dust collection path R extends from the drill bit B through the flexible hose 105, the pipe 80, the dust collection box 65, the motor housing chamber 90 to the exhaust port.

[0056] When the dust collection system S is used for operation, the switch lever 30 is pressed down while the end of the drill bit B is pressed against the workpiece surface. Then, the auxiliary switch 22 is turned on first. The on signal of the auxiliary switch 22 is input to the dust collection side controller 96 via the auxiliary wire 27 and the signal wire 97. If the dust collection side controller 96 receives the on signal, the power of the battery pack 101 obtained from the terminal block 102 via the power wire 103 is supplied to the dust collection motor 92 via the wire 95. Therefore, the dust collection motor 92 is driven to rotate the rotating shaft 93 and rotate the dust collection fan 94. In this way, the dust collection path R becomes negative pressure, and suction force is generated at the end opening of the drill bit B.

[0057] The main switch 21 is turned on after the sub-switch 22 is turned on. The on signal of the main switch 21 is input to the main controller 13 via the main line 24. If the main controller 13 receives the on signal, the industrial power source obtained from the power line 20 supplies the working power to the motor 7. Therefore, the motor 7 drives the rotating shaft 8 to rotate, and the intermediate shaft 36 and the crank shaft 37 rotate. Here, no matter which mode is selected between the hammer drill mode and the electric hammer mode, the piston 44 always reciprocates. Therefore, the drill bit B is impacted via the impact bolt 49 through the linked impactor 48.

[0058] The power path from the power cord 20 to the motor 7 via the main controller 13 is electrically separated from the power path from the battery pack 101 to the dust collecting motor 92 via the dust collecting controller 96. In addition, a linkage unit (sub-switch 22, sub-conductor 27, signal conductor 97) is provided, which drives / stops the dust collecting motor 92 in conjunction with the operation of the main switch 21 while being electrically separated from the signal path of the main switch 21.

[0059] Therefore, even if noise is generated in the dust collecting motor 92, it is possible to prevent the generated noise from propagating to the power supply path of the hammer drill 1. Therefore, it is possible to pass the EMI standard test, and noise countermeasures are not required.

[0060] Dust generated from the workpiece is sucked into the dust suction path in the drill B and enters the duct 80 via the flexible hose 105. The dust then passes through the dust collection path R and enters the dust collection box 65, is captured by the filter 83, and is stored in the box body 82.

[0061] When the operation is completed and the switch lever 30 is released from the pressing operation, the main switch 21 is turned off. Then, the main machine controller 13 stops the power supply to the motor 7, and the operation of the hammer drill 1 is stopped.

[0062] When the auxiliary switch 22 is turned off with the release of the pressing operation of the switch lever 30, the dust collection side controller 96 stops supplying power to the dust collection motor 92 after confirming that the auxiliary switch 22 is turned off after a preset delay time of several seconds. Therefore, the dust remaining in the dust collection path R when the hammer drill 1 stops working can be stored in the dust collection box 65.

[0063] When removing the dust collecting attachment 60 from the hammer drill 1, the lower parts of the left and right hook plates 71 are pressed down to move the hook plates 71 to the unlocked position. Then, the locking claws 74 are disengaged from the locking recesses 19 of the front cylinder 11, allowing the relative movement of the dust collecting attachment 60. Then, the dust collecting attachment 60 is relatively moved in the separation direction away from the hammer drill 1 in the opposite direction to the installation. Then, the dust collecting side coupling part 66 is disengaged from the locking groove 15 of the main unit side coupling part 14 and separated downward. In this way, the removal of the dust collecting attachment 60 is completed.

[0064] When the dust accumulated in the dust box 65 is discarded, the elastic piece 86 is pressed to release the locking between the elastic piece 86 and the front protrusion 63. Then, if the dust box 65 is tilted forward around the locking shaft 84, the dust box 65 can be removed from the housing 61. If the cover 81 is opened, the dust accumulated inside the box body 82 can be discarded.

[0065] Next, a description will be given of a case where the dust collecting attachment 60 is mounted on a hammer drill having a different form using an adapter.

[0066] Figure 4 The hammer drill (second electric tool, electric tool) 1A shown has a main unit side coupling portion 14 similar to the hammer drill 1 described above, on the front surface of the front cylinder portion 11 .

[0067] The upper and lower dimensions of the front barrel 11 of the hammer drill 1A are shorter than those of the hammer drill 1. When the receiving portion 76 provided on the upper surface of the rear protrusion 64 of the dust collecting attachment 60 is in contact with the lower surface of the front barrel 11, the locking claw 74 of the hook plate 71 and the locking recess 19 of the front barrel 11 are offset in the upper and lower directions, and the locking recess 19 is located below the locking claw 74. In addition, when the main unit side coupling portion 14 is locked to the dust collecting side coupling portion 66, the locking claw 74 and the locking recess 19 are offset in the front and rear directions, and the locking recess 19 is located in the front of the locking claw 74.

[0068] Therefore, the adapter 200 is used. The adapter 200 includes a vertical plate portion 201 and a horizontal plate portion 202. The vertical plate portion 201 is located between the front tube portion 11 and the main body portion 62. The horizontal plate portion 202 is located between the front tube portion 11 and the rear protruding portion 64.

[0069] like Figure 5 As shown, the longitudinal plate portion 201 has a front side joint portion 14A and a rear side joint portion 66A. The front side joint portion 14A is of the same form as the main unit side joint portion 14 of the hammer drill 1. A retaining groove 15A identical to the retaining groove 15 is formed on the left and right of the front side joint portion 14A. The rear side joint portion 66A is of the same form as the dust collecting side joint portion 66. An engaging recess 67A for engaging the ball portion 17 of the main unit side joint portion 14 is formed on the rear surface of the longitudinal plate portion 201. The spacing in the front-to-back direction between the retaining groove 15A and the rear side joint portion 66A is consistent with the spacing in the front-to-back direction when the retaining claw 74 is offset to the rear of the retaining recess 19 when the main unit side joint portion 14 and the dust collecting side joint portion 66 are directly coupled without using the adapter 200.

[0070] The transverse plate portion 202 has an upper receiving portion 203 on the upper surface. The upper receiving portion 203 has the same shape as the receiving portion 76. The interval in the vertical direction from the lower surface of the transverse plate portion 202 to the upper surface of the upper receiving portion 203 is consistent with the interval in the vertical direction when the locking claw 74 is offset upward from the locking recess 19 in a state where the main unit side coupling portion 14 and the dust collection side coupling portion 66 are directly coupled without using the adapter 200.

[0071] An intermediate tube 204 is provided at the rear side of the upper receiving portion 203 and at the center of the horizontal plate portion 202 in the left-right direction. The intermediate tube 204 extends in the vertical direction. The upper end of the intermediate tube 204 can be fitted into the connection port 28 of the hammer drill 1A. The connection tube 77 of the dust collection attachment 60 can be fitted into the lower end of the intermediate tube 204.

[0072] The intermediate tube 204 holds a connection metal fitting 205. The connection metal fitting 205 has a male connector 206 at the upper end and a female connector 207 at the lower end. The male connector 206 can be inserted into and connected to the female connector 29 of the connection port 28. The male connector 78 of the connection tube 77 can be inserted into and connected to the female connector 207.

[0073] When the dust collecting attachment 60 is installed on the hammer drill 1A using the adapter 200, first, the adapter 200 is installed on the dust collecting attachment 60. The front side coupling portion (mechanical coupling portion) 14A of the longitudinal plate portion 201 of the adapter 200 is relatively moved downward from the top of the dust collecting side coupling portion 66 and slid until the receiving portion 76 of the rear protrusion 64 abuts against the lower surface of the transverse plate portion 202. Then, the dust collecting side coupling portion 66 is locked in the locking groove 15A of the front side coupling portion 14A, and the longitudinal plate portion 201 is connected to the main body 62. In addition, the connecting tube 77 is inserted into the intermediate tube 204, and the male connector 78 is inserted into the female connector portion 207 of the connecting metal member 205 and connected thereto.

[0074] Next, the main unit side coupling part 14 of the hammer drill 1A is relatively moved downward from above the rear side coupling part (mechanical coupling part) 66A of the adapter 200 and slid until the upper receiving part 203 of the horizontal plate part 202 abuts against the lower surface of the front cylinder part 11. Then, the rear side coupling part 66A is locked with the locking groove 15 of the main unit side coupling part 14, and the vertical plate part 201 is connected with the front cylinder part 11. In addition, the locking claw 74 of the hook plate 71 is locked with the locking recess 19, and the dust collection attachment 60 is installed on the hammer drill 1A. At the same time, the intermediate cylinder 204 is inserted into the connection port 28, and the male connector part 206 of the connecting metal part (electrical connection part) 205 is inserted into the female connector 29 and connected thereto.

[0075] In this way, the hammer drill 1A and the dust collection attachment 60 are connected via the adapter 200. At the same time, the sub-switch 22 of the hammer drill 1A and the dust collection-side controller 96 are electrically connected via the sub-conducting wire 27, the connecting metal fitting 205, and the signaling wire 97.

[0076] The dust collection attachment 60 and the dust collection system S of the first embodiment include an adapter 200 that can be mounted on the hammer drill 1A and can be detached from the housing 61. The adapter 200 includes: a front coupling portion 14A and a rear coupling portion 66A that can be coupled to the housing 61 and the hammer drill 1A; and a connection metal member 205 that is coupled to the hammer drill 1A and electrically connects the dust collection attachment 60 to the hammer drill 1A.

[0077] According to this configuration, even the self-suction type dust collecting attachment 60 having the dust collecting motor 92 and the dust collecting fan 94 can be mechanically coupled to the hammer drill 1 and the hammer drill 1A, respectively, and can also be electrically connected.

[0078] The connection fitting 205 electrically connects the main switch 21 provided in the hammer drill 1A and the dust collection-side controller 96 which is provided in the housing 61 and controls the dust collection motor 92 .

[0079] Therefore, the dust collecting motor 92 can be driven in conjunction with the operation of the main switch 21 of the hammer drill 1A.

[0080] The adapter 200 can be attached to the housing 61 and the hammer drill 1A respectively by relatively moving in the same direction, that is, in the up-down direction, with respect to the housing 61 and the hammer drill 1A.

[0081] Therefore, even when the adapter 200 is used, the housing 61 can be smoothly attached to the hammer drill 1A in a short time.

[0082] The adapter 200 has a mounting surface for mounting to the hammer drill 1A on the opposite side of the mounting surface for mounting to the housing 61 on the adapter 200 in the front-rear direction. In this embodiment, the adapter 200 has a mounting surface for mounting to the hammer drill 1A on the rear side of the mounting surface for mounting to the housing 61 which is the front side.

[0083] Therefore, the two mounting surfaces can be easily distinguished, and the adapter 200 can be mounted to the housing 61 and the adapter 200 can be mounted to the hammer drill 1A in order without error.

[0084] The adapter 200 has the front-side coupling portion 14A, the rear-side coupling portion 66A, and the connection fitting 205 on different surfaces.

[0085] Therefore, the mechanical coupling parts and the electrical connection parts to the housing 61 and the hammer drill 1A can be arranged without interfering with each other.

[0086] The housing 61 has a shape extending from the front side to the bottom side of the hammer drill 1A. The front side joint portion 14A and the rear side joint portion 66A are provided between the rear surface of the housing 61 and the front surface of the hammer drill 1A. The connection metal member 205 is provided between the upper surface of the housing 61 and the lower surface of the hammer drill 1A.

[0087] Therefore, the mechanical connection portion and the electrical connection portion that mechanically connect the housing 61 and the hammer drill 1A can be easily space-saving by utilizing the shape of the housing 61 .

[0088] Example 2

[0089] In the first embodiment, the hammer drill is an AC machine, but the adapter of the present disclosure can also be applied to a DC machine that uses a battery pack as a power source for the hammer drill.

[0090] Figure 6 The hammer drill (second electric tool, electric tool) 1B shown has a lower housing 51 integrated with the handle portion 12 on the lower side of the motor housing 3. A host-side battery assembly portion 52 is provided at the rear portion of the lower housing 51. Two host-side battery packs (host-side batteries) 53 are slidably assembled in the host-side battery assembly portion 52 from the left side. The rated voltage (e.g., 40V) of each host-side battery pack 53 is greater than the rated voltage (e.g., 18V) of the battery pack (dust-collecting side battery) 101 of the dust collection attachment 60. The host-side controller 13 is provided in the lower housing 51 at the front side of the host-side battery assembly portion 52.

[0091] In the handle portion 12, there is no sub-switch, but only the main switch 21. The main switch 21 is electrically connected to the host-side controller 13 via the main lead 24. Terminal blocks (not shown) are provided at the front and rear of the host-side battery assembly portion 52. The two assembled host-side battery packs 53 are electrically connected to the terminal blocks. Each terminal block is electrically connected to the host-side controller 13 via the host-side second lead 54.

[0092] The connection port 28 is provided on the lower front side of the lower housing 51. The female connector 29 of the connection port 28 is electrically connected to the host-side controller 13 via the host-side third lead wire 55.

[0093] The longitudinal plate portion 201 of the adapter 200A has the same structure as the longitudinal plate portion 201 of the first embodiment. The transverse plate portion 202 accommodates the converter 208 inside. A connection recess 209 is formed on the rear lower surface of the transverse plate portion 202 and in the center in the left-right direction. The connection recess 209 can fit the connection tube 77 of the rear protrusion 64. The female terminal 210 is provided in the connection recess 209. The male connector 78 of the connection tube 77 is inserted and connected to the female terminal 210.

[0094] A connection protrusion 211 is formed on the front upper surface of the horizontal plate portion 202 and in the center portion in the left-right direction. The connection protrusion 211 can be fitted with the connection port 28 of the front tube portion 11. A male terminal 212 is provided on the connection protrusion 211. The male terminal 212 is inserted into and connected to the female connector 29 of the connection port 28. The female terminal 210 and the male terminal 212 are electrically connected to the converter 208 through internal wires 213, respectively.

[0095] When the dust collecting attachment 60 is mounted on the hammer drill 1B using the adapter 200A, first, the adapter 200A is mounted on the dust collecting attachment 60. As in the first embodiment, the front side coupling portion 14A of the vertical plate portion 201 is relatively moved downward from above the dust collecting side coupling portion 66 and slid until the receiving portion 76 of the rear protrusion 64 abuts against the lower surface of the horizontal plate portion 202. Figure 7 As shown, the dust collecting side joint part 66 is locked with the locking groove 15A of the front side joint part 14A, and the vertical plate part 201 is connected with the main body 62. At the same time, the connecting cylinder 77 is engaged with the connecting recess 209, and the male connector 78 is inserted into the female terminal 210 and connected thereto.

[0096] Next, the main unit side coupling part 14 of the hammer drill 1B is relatively moved downward from above the rear side coupling part 66A of the adapter 200A and slid until the upper surface of the horizontal plate part 202 abuts against the lower surface of the front cylinder part 11. Then, the rear side coupling part 66A is locked with the locking groove 15 of the main unit side coupling part 14, and the vertical plate part 201 is connected with the front cylinder part 11. At the same time, the locking claw 74 of the hook plate 71 is locked with the locking recess 19, and the dust collection attachment 60 is installed on the hammer drill 1B. At the same time, the connection protrusion 211 is inserted into the connection port 28, and the male terminal 212 is inserted into the female connector 29 and connected thereto.

[0097] Therefore, the hammer drill 1B and the dust collection attachment 60 are connected via the adapter 200A. At the same time, the host controller 13 and the dust collection controller 96 are electrically connected via the host third wire 55, the internal wire 213, the converter 208, the internal wire 213, and the signal wire 97.

[0098] In the second embodiment, if the remaining capacity of the battery pack 101 on the dust collection attachment 60 side decreases and the voltage that enables the dust collection motor 92 to be driven cannot be obtained, the host side controller 13 that obtains the information from the dust collection side controller 96 supplies the power from the host side battery pack 53 to the dust collection motor 92. At this time, the power supply voltage of the host side battery pack 53 is stepped down by the converter 208 and applied as a power supply voltage suitable for the dust collection motor 92.

[0099] The dust collection attachment 60 and the dust collection system S of the second embodiment include: an adapter 200A that can be mounted on the hammer drill 1B and can be detached from the housing 61. The adapter 200A includes: a front coupling portion 14A and a rear coupling portion 66A that can be coupled to the housing 61 and the hammer drill 1B; and an electrical connection portion (female terminal 210, internal wire 213, converter 208, internal wire 213, male terminal 212) that is coupled to the hammer drill 1B and electrically connects the dust collection attachment 60 to the hammer drill 1B.

[0100] According to this configuration, even the self-suction type dust collecting attachment 60 having the dust collecting motor 92 and the dust collecting fan 94 can be mechanically coupled to the hammer drill 1 and the hammer drill 1B, respectively, and can also be electrically connected.

[0101] In particular, the electrical connection portion (female terminal 210, internal conductive wire 213, converter 208, internal conductive wire 213, male terminal 212) can be supplied with power from the hammer drill 1B.

[0102] Therefore, even when the adapter 200A is used, the power source of the hammer drill 1B can be utilized as the power source of the dust collecting attachment 60 , and the usability is improved.

[0103] The hammer drill 1B has a main body battery pack 53 as a power source. The housing 61 has a battery pack 101 having a rated voltage different from that of the main body battery pack 53. The adapter 200A has a converter 208 for converting the rated voltage of the main body battery pack 53 into the rated voltage of the battery pack 101.

[0104] Therefore, even if the hammer drill 1B has the main body battery pack 53 with a different rated voltage, the power source can be utilized in the dust collecting attachment 60 .

[0105] Example 3

[0106] for Figure 8 In the hammer drill (second electric tool, electric tool) 1C shown, a main unit battery pack 53 is slidably mounted on the main unit battery mounting portion 52 of the lower housing 51 from the rear. The main unit battery pack 53 has the same rated voltage as the battery pack 101 on the dust collection attachment 60 side.

[0107] The vertical plate portion 201 of the adapter 200B is the same as that of the second embodiment. However, no converter is provided on the horizontal plate portion 202, and the female terminal 210 and the male terminal 212 are directly electrically connected via the internal wire 213. The host-side controller 13 is accommodated in the front upper portion of the lower housing 51 in a posture extending in the front-rear direction.

[0108] When the dust collecting attachment 60 is mounted on the hammer drill 1C using the adapter 200B, first, the adapter 200B is mounted on the dust collecting attachment 60. As in the second embodiment, the front side coupling portion 14A of the vertical plate portion 201 is relatively moved downward from above the dust collecting side coupling portion 66 and slid until the receiving portion 76 of the rear protrusion 64 abuts against the lower surface of the horizontal plate portion 202. Figure 7 Similarly, the front side coupling part 14A and the dust collecting side coupling part 66 are locked with each other, and the vertical plate part 201 is coupled to the main body part 62. In addition, the connecting cylinder 77 is inserted into the connecting recess 209, and the male connector 78 is inserted into the female terminal 210 and connected thereto.

[0109] Next, the main unit-side coupling portion 14 of the hammer drill 1C is relatively moved downward from above the rear-side coupling portion 66A of the adapter 200B and slid until the upper surface of the horizontal plate portion 202 abuts against the lower surface of the front tube portion 11. Then, the rear-side coupling portion 66A and the main unit-side coupling portion 14 are locked with each other, and the vertical plate portion 201 is connected to the front tube portion 11. In addition, the locking claw 74 of the hook plate 71 is locked with the locking recess 19, and the dust collection attachment 60 is installed on the hammer drill 1C. At the same time, the connection protrusion 211 is inserted into the connection port 28, and the male terminal 212 is inserted into the female connector 29 and connected thereto.

[0110] Therefore, the hammer drill 1C and the dust collection attachment 60 are connected via the adapter 200B. At the same time, the main machine controller 13 and the dust collection controller 96 are electrically connected via the main machine third lead wire 55, the internal lead wire 213, and the signal lead wire 97.

[0111] In Example 3, if the remaining capacity of the battery pack 101 on the dust collecting accessory 60 side decreases and a voltage capable of driving the dust collecting motor 92 cannot be obtained, the host side controller 13 that obtains information from the dust collecting side controller 96 supplies power from the host side battery pack 53 to the dust collecting motor 92.

[0112] The dust collection attachment 60 and the dust collection system S of the third embodiment include an adapter 200B that can be mounted on the hammer drill 1C and can be detached from the housing 61. The adapter 200B includes: a front coupling portion 14A and a rear coupling portion 66A that can be coupled to the housing 61 and the hammer drill 1C; and an electrical connection portion (female terminal 210, internal wire 213, male terminal 212) that is coupled to the hammer drill 1C and electrically connects the dust collection attachment 60 to the hammer drill 1C.

[0113] According to this configuration, even the self-suction dust collecting attachment 60 having the dust collecting motor 92 and the dust collecting fan 94 can be mechanically coupled to the hammer drill 1 and the hammer drill 1C and can be electrically connected to the hammer drill 1 and the hammer drill 1C.

[0114] The hammer drill 1C has a main body battery pack 53 as a power source. The housing 61 has a battery pack 101 having the same rated voltage as the main body battery pack 53. The dust collection controller 96 can be operated by either the main body battery pack 53 or the battery pack 101, and can control the dust collection motor 92.

[0115] Therefore, even if the remaining capacity of the battery pack 101 is exhausted, the dust collecting motor 92 can be driven using the main body battery pack 53 as a power source.

[0116] Hereinafter, modified examples of the present disclosure will be described.

[0117] In the above embodiments, the main unit side joint part is formed into a protrusion, and the dust collection side joint part is formed into a pair of guide rails, but this can also be reversed. In this case, the mechanical joint part of the adapter is also formed into: the front side joint part is formed into a pair of guide rails, and the rear side joint part is formed into a protrusion. It is also possible that the protrusion is also formed into a pair of guide rails, and the mechanical joint is performed by a pair of guide rail-shaped joint parts.

[0118] In the above embodiments, the hammer drill is connected to the dust collection accessory by the main unit side connection part and the dust collection side connection part arranged in the center in the left-right direction, but the main unit side connection part and the dust collection side connection part may be arranged on the left and right sides respectively. The mechanical connection part of the adapter is also arranged on the left and right sides.

[0119] The main unit side joint part and the dust collection side joint part are not limited to the form extending in the up-down direction. The joint parts that are discontinuous up and down can also be engaged with each other. Alternatively, the front side joint part and the rear side joint part of the adapter are also formed discontinuously up and down.

[0120] In the above-mentioned embodiments, hook plates are provided on the left and right sides of the rear protrusion of the dust collection attachment separately from the main unit side coupling part, the dust collection side coupling part, and the mechanical coupling part of the adapter, and the sliding of the dust collection attachment is locked by the hook plates, but such a locking unit may also be provided on the main body. For example, a locking claw may be provided protruding from the main body and being forced to be locked on the front surface of the hammer drill, and the locking claw may be retracted by the release operation of the main body.

[0121] The ball portion and the coil spring provided at the main unit side coupling portion may also be provided at the adapter.

[0122] In the above-described embodiments, an example in which the dust collection attachment is attached to one type of hammer drill using an adapter is described. However, the dust collection attachment may be attached to two or more types of hammer drills using an adapter.

[0123] For the hammer drill, the position and orientation of the motor and the position and orientation of the host-side controller are not limited to the above-mentioned embodiments. For example, the motor may be in a posture in which the rotating axis is forward or obliquely forward.

[0124] The structure of the impact mechanism is not limited to the above-mentioned embodiments. The operation mode may be selectable as an electric drill mode.

[0125] The power tool is not limited to a hammer drill, but may also be other power tools such as an electric hammer.

[0126] In the above embodiments, a dust suction drill is used as the end tool mounted on the electric tool, but the end tool may not be a dust suction drill. In this case, another cylindrical accessory covering the outside of the end tool may be mounted on the end of the electric tool, and a hose mounting portion provided on the accessory may be connected to the suction portion of the dust collection accessory via a flexible hose.

[0127] The mounting direction of the dust collection attachment relative to the electric tool is not limited to the up-down direction. The mounting direction may be, for example, the front-back direction.

[0128] In the dust collection accessory, the position and orientation of the dust collection motor, the position and structure of the dust collection box are not limited to the above-mentioned embodiments. For example, the dust collection motor may be accommodated with the rotating shaft facing upward and sideways. Alternatively, the dust collection motor and the fan shaft may be different, and the rotation is transmitted from the rotating shaft of the dust collection motor to the shaft of the fan.

[0129] The dust collecting unit is not limited to a dust collecting box, and may be a dust separator structure without a filter. Therefore, the dust collecting path can be appropriately changed.

[0130] Alternatively, the battery pack may be mounted on the battery mounting portion of the dust collecting attachment not by sliding from the rear but by sliding from the side. A plurality of battery packs may be mounted.

[0131] Alternatively, in the dust collection accessory, the connection portion of the flexible hose is not the front surface of the housing, but other positions such as the upper surface, the side surface, etc. The dust collection accessory may not use a flexible hose. For example, the dust collection accessory may have a cylindrical sliding portion that has a dust collection path therein and protrudes from the housing, and a suction port for the end tool to pass through is provided at the end of the sliding portion.

Claims

1. A dust collecting accessory for an electric tool, the dust collecting accessory (60) being mountable on a first electric tool (1), It is characterized in that have: Housing (61); A suction portion (80); a dust collecting section (65) for capturing dust sucked from the suction section (80); a fan (94) which enables the suction portion (80) to generate a suction force; a dust collecting motor (92) for rotating the fan (94); as well as The adapter (200) is a adapter (200) that can be mounted on at least the second electric tool (1A) and can be attached to and detached from the housing (61), and the adapter (200) has: A mechanical coupling portion (14A, 66A) capable of coupling with the housing (61) and the second electric tool (1A); as well as An electrical connection portion (205) is coupled to the second electric tool (1A) and electrically connects the dust collection attachment (60) to the second electric tool (1A).

2. The dust collection accessory for an electric tool according to claim 1, It is characterized in that The electrical connection portion (205) electrically connects a switch (21) provided on the second electric power tool (1A) to a dust collection side controller (96) provided in the housing (61) and controlling the dust collection motor (92).

3. The dust collection accessory for an electric tool according to claim 2, It is characterized in that The electrical connection portion can be supplied with power from the second electric power tool (1B).

4. The dust collection accessory for an electric tool according to claim 3, It is characterized in that The second electric tool (1C) has a main body side battery (53) serving as a power source. The housing (61) has a dust collection side battery (101) having the same rated voltage as the main body side battery (53). The dust collection side controller (96) can be operated by any one of the main unit side battery (53) and the dust collection side battery (101), thereby enabling the dust collection side controller (96) to control the dust collection motor (92).

5. The dust collection accessory for an electric tool according to claim 3, It is characterized in that The second electric tool (1B) has a main body side battery (53) serving as a power source. The housing (61) has a dust collection side battery (101) having a rated voltage different from that of the host side battery (53). The adapter (200A) includes a converter (208) for converting the rated voltage of the main unit-side battery (53) into the rated voltage of the dust collection-side battery (101).

6. The dust collection accessory for an electric tool according to any one of claims 1 to 5, It is characterized in that The adapter (200) can be mounted on the housing (61) and the second electric tool (1A) respectively by relative movement in a first direction relative to the housing (61) and the second electric tool (1A).

7. The dust collection accessory for an electric tool according to claim 6, It is characterized in that The adapter (200) has a mounting surface for mounting with the second electric tool (1A) on the side opposite to the mounting surface for mounting with the housing (61) in a second direction intersecting the first direction.

8. The dust collection accessory for an electric tool according to any one of claims 1 to 7, It is characterized in that The adapter (200) has the mechanical coupling portion (14A, 66A) and the electrical connection portion (205) on different surfaces.

9. The dust collection accessory for an electric tool according to claim 8, It is characterized in that The housing (61) has a shape extending from the front side to the bottom side of the second electric tool (1A). The mechanical coupling portion (14A, 66A) is disposed between the rear surface of the housing (61) and the front surface of the second electric tool (1A). The electrical connection portion (205) is provided between the upper surface of the housing (61) and the lower surface of the second electric tool (1A).

10. An electric tool, It is characterized in that have: The dust collection accessory (60) for an electric tool according to any one of claims 1 to 9; and The adapter (200) is capable of mounting the dust collection attachment (60) for the electric tool.

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