Dust collecting attachment for electric power tool and electric power tool

Abstract

To provide a dust collecting attachment for an electric power tool which can be mechanically connected with multiple types of electric power tools and can be electrically connected therewith even when the electric power tool with a dust collecting motor and a fan is a self-sucking type one.SOLUTION: A dust collecting attachment 60 whose casing 61 can be attached to a hammer drill 1 includes an adapter 200 where the casing 61 can be attached to a hammer drill 1A. The adapter 200 includes: a front side connection part 14A and a rear side connection part 66A which can be connected with the casing 61 and the hammer drill 1A; and a connection metal fitting 205 which enables connection with the hammer drill 1A and electrical connection between the dust collecting attachment 60 and the hammer drill 1A.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a dust collection attachment that is attached to a power tool to collect dust generated when the power tool is in use, and to a power tool to which the dust collection attachment is attached. [Background technology]

[0002] When a workpiece such as concrete or stone is machined using a power tool such as a hammer drill, a dust collection attachment is attached to the power tool to prevent dust generated from the workpiece from scattering. As disclosed in Patent Document 1, this dust collection attachment includes a suction section that sucks in dust and a dust collection section that stores the sucked dust. In the system of Patent Document 1, when a dust collection device is attached to a power tool, a dust collection path in the dust collection device communicates with the inside of the power tool having a fan. Therefore, when the fan rotates as the power tool is driven, a suction force is generated in the suction section of the dust collection device, and the sucked dust is collected by the dust collection section. In addition, in the system of Patent Document 1, since the position and shape of the attachment part of the dust collector differs for each power tool, it is necessary to manufacture a dust collector for each power tool, which reduces the versatility of the dust collector. In consideration of this, an adapter is provided to connect the dust collector to the power tool. This adapter makes it possible to attach a common dust collector to multiple types of power tools. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-40593 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned conventional system merely mechanically connects the power tool and the dust collection attachment, so if the dust collection attachment itself is a self-suction type having a dust collection motor and a fan, there is a problem that the power tool cannot transmit signals or supply power to the dust collection attachment, and an adapter cannot be used.

[0005] Therefore, the present disclosure aims to provide a dust collection attachment and a power tool that can be mechanically coupled to multiple types of power tools and can also be electrically connected, even if the dust collection attachment and the power tool are of a self-suction type having a dust collection motor and fan. [Means for solving the problem]

[0006] In order to achieve the above object, a first configuration of the present disclosure is a dust collection attachment including a casing, a suction unit, a dust collection unit that captures dust sucked through the suction unit, a fan that generates suction force in the suction unit, and a dust collection motor that rotates the fan, the casing being attachable to a first power tool, The casing is provided with an adapter that is detachably attachable to at least a second electric power tool, the adapter comprising: It is characterized by comprising a mechanical connecting portion that can be connected to the casing and the second power tool, and an electrical connection portion that electrically connects the dust collection attachment to the second power tool in addition to connecting to the second power tool. In order to achieve the above object, a second configuration of the present disclosure is a power tool, characterized in that the power tool dust collection attachment of the first configuration is attached via an adapter. Effect of the Invention

[0007] According to the present disclosure, even if the tool is of a self-suction type having a dust collection motor and a fan, it is possible to mechanically couple the tool to the power tool and the second power tool, and also to electrically connect the tool to the power tool. [Brief description of the drawings]

[0008] [Figure 1]1 is a central vertical cross-sectional view of a dust collection system for a power tool in which a dust collection attachment for a power tool is directly attached to a hammer drill. [Diagram 2] FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. [Diagram 3] FIG. 2 is an enlarged view of the left half of the portion of line BB in FIG. [Figure 4] 13 is a central vertical cross-sectional view of a dust collection system for a power tool in which the dust collection attachment with an adapter is attached to another hammer drill. FIG. [Diagram 5] 5 is an enlarged cross-sectional view taken along the line CC in FIG. 4. [Figure 6] 11 is a central vertical cross-sectional view of a dust collection system for a power tool in which the adapter-equipped power tool dust collection attachment of the second embodiment is attached to another hammer drill. FIG. [Figure 7] FIG. 7 is an enlarged cross-sectional view taken along the line DD in FIG. 6. [Figure 8] 13 is a central vertical cross-sectional view of a dust collecting system for a power tool in which the dust collecting attachment for a power tool with an adapter of the third embodiment is attached to another hammer drill. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In one embodiment of the present disclosure, the electrical connection portion may electrically connect a switch provided on the second power tool and a dust collection side controller provided within the casing and controlling the dust collection motor. According to this configuration, the dust collection motor can be driven in conjunction with the ON / OFF operation of the switch of the second power tool. In one embodiment of the present disclosure, the electrical connection may be capable of receiving power from a second power tool. According to this configuration, even when the adapter is used, the power source of the second power tool can be used to power the dust collection attachment, improving usability. In one embodiment of the present disclosure, the second electric tool is provided with a main unit battery that serves as a power source, and the casing is provided with a dust collection side battery having the same rated voltage as the main unit battery, and the dust collection side controller may be capable of operating with either the main unit battery or the dust collection side battery to control the dust collection motor. According to this configuration, even if the remaining capacity of the dust-collection side battery runs out, the dust-collection motor can be driven using the main unit side battery as a power source. In one embodiment of the present disclosure, the second power tool is provided with a main unit battery that serves as a power source, the casing is provided with a dust collection side battery having a different rated voltage from the main unit battery, and the adapter may be provided with a converter that converts the rated voltage of the main unit side battery to the rated voltage of the dust collection side battery. With this configuration, even if the second power tool has a main battery with a different rated voltage, the power source can be used by the dust collection attachment.

[0010] In one embodiment of the present disclosure, the adapter may be attachable to the casing and the second power tool, respectively, for relative movement in the same direction. According to this configuration, even if the adapter is used, the casing can be attached to the second power tool smoothly and quickly. In one embodiment of the present disclosure, an attachment surface for attachment to the second electric tool may be provided on the adapter opposite to the attachment surface for attachment to the casing in a direction intersecting the same direction. With this configuration, the two mounting surfaces can be easily distinguished, and mounting of the adapter to the casing and mounting of the adapter to the second power tool can be performed in the correct order without error. In an embodiment of the present disclosure, the mechanical coupling portion and the electrical connection portion of the adapter may be provided on different surfaces. According to this configuration, the mechanical coupling portion and the electrical connection portion to the casing and the second power tool can be arranged without interfering with each other. In one embodiment of the present disclosure, the casing has a shape spanning from the front to the bottom of the second power tool, the mechanical connection portion of the adapter is provided between the rear surface of the casing and the front surface of the second power tool, and the electrical connection portion is provided between the top surface of the casing and the bottom surface of the second power tool. According to this configuration, the mechanical coupling and electrical connection to the casing and the second power tool can be easily achieved in a space-saving manner by utilizing the shape of the casing. EXAMPLES

[0011] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a central vertical cross-sectional view showing an example of a dust collection system for a power tool (hereinafter simply referred to as a "dust collection system") S formed by directly attaching a dust collection attachment 60 to a hammer drill 1 without using an adapter described later. First, a description will be given of the hammer drill 1. The hammer drill 1 is an example of a first power tool of the present disclosure. The hammer drill 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 houses a striking mechanism 6 extending in the front-rear direction. The motor housing 3 is connected to the lower side of the inner housing 2 and houses a motor 7. The motor 7 is held in the motor housing 3 with a rotating shaft 8 facing upward. An upper part of the rotating shaft 8 is supported by a bearing 9 held in the inner housing 2, and a pinion 10 provided at the upper end thereof protrudes into the inner housing 2. The upper outer housing 4 covers the outside of the inner housing 2 above the motor housing 3 .

[0012] The lower outer housing 5 has a front tubular portion 11 and a handle portion 12. The front tubular portion 11 covers the outside of the motor housing 3 from below. A main unit controller 13 equipped with a control circuit board (not shown) is housed in the front tubular portion 11 at the rear of the motor housing 3 in the vertical direction. The main unit side coupling part 14 is provided at the center in the left-right direction on the front surface of the front tube part 11. As shown in FIG. 2, the main unit side coupling part 14 is a protrusion extending in the up-down direction with a T-shaped cross section in the front-rear-left-right direction. A pair of locking grooves 15, 15 extending upward from the lower end of the front tube part 11 are formed on the left and right sides of the main unit side coupling part 14. A bottomed hole 16 that opens to the front is formed in the front-rear direction at the center in the left-right direction in the main unit side coupling part 14. A ball 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 17. A coil spring 18 is accommodated in the bottomed hole 16 behind the ball 17. Thus, the ball 17 is biased by the coil spring 18 to a protruding position where it partially protrudes from the opening of the bottomed hole 16. As shown in FIG. 3, locking recesses 19 for mounting a dust collection attachment 60 are formed in the left and right side surfaces of the front cylindrical portion 11 in the front-rear direction.

[0013] The handle portion 12 is connected to the lower portion of the front tubular portion 11 and extends rearward, and then extends upward to be connected to the rear end of the upper outer housing 4 . A power cord 20 is connected to the bottom of the handle portion 12. The power cord 20 is electrically connected to the machine-side controller 13. A main switch 21 and a sub-switch 22 are provided above the power cord 20 within the handle portion 12. The main switch 21 has a plunger 23 protruding forward. A main lead wire 24 is connected to the main switch 21. The main lead wire 24 is electrically connected to the machine-side controller 13, and can input an ON signal to the machine-side controller 13 when the plunger 23 is pressed. The sub-switch 22 also has a plunger 25 protruding forward and a lever 26 in front of it. A sub-lead wire 27 is connected to the sub-switch 22. The sub-lead wire 27 passes between the main switch 21 and the inner surface of the handle portion 12 and is drawn downward inside the handle portion 12. A connection port 28 that opens downward is provided below the main controller 13 on the lower surface of the front cylindrical portion 11 of the lower outer housing 5. A female connector 29 is provided facing downward in the connection port 28. The sub-lead wire 27 is connected to the female connector 29.

[0014] 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 portion 12 so as to be swingable back and forth around its lower end. In a normal state, the switch lever 30 is in a protruding position in which it is in contact with the plunger 23 of the main switch 21 and protrudes forward from the handle portion 12. A pressing portion 31 is provided on the switch lever 30 above the contact portion of the plunger 23, and is located in front of the lever 26 of the sub-switch 22. Therefore, when the switch lever 30 is pushed backward from the protruding position, the plunger 23 is pushed in to turn on the main switch 21, and the pressing portion 31 pushes the plunger 25 via the lever 26 to also turn on the sub-switch 22. However, due to the setting of the length of the pressing portion 31, the timing at which the sub-switch 22 turns on is earlier than the timing at which the main switch 21 turns on.

[0015] The striking mechanism 6 has a tool holder 35. The tool holder 35 is rotatably held at the front side of the inner housing 2 and is cylindrical extending in the front-rear direction. Within the inner housing 2, an intermediate shaft 36 is supported at the front side of the rotating shaft 8, and a crankshaft 37 is supported at the rear side in the vertical direction. A gear 38 and a gear 39 are provided on the intermediate shaft 36 and the crankshaft 37, respectively. The gear 38 and the gear 39 are engaged with the pinion 10 of the rotating shaft 8. The intermediate shaft 36 has a first bevel gear 40 at its upper end. A switching sleeve 41 is splined to the tool holder 35. A second bevel gear 42 is rotatably mounted on the rear end of the tool holder 35 behind the switching sleeve 41. The second bevel gear 42 meshes with the first bevel gear 40 of the intermediate shaft 36. The second bevel gear 42 transmits the rotation of the first bevel gear 40 to the tool holder 35 by engaging with the switching sleeve 41 in the retracted position. The forward / rearward position of the switching sleeve 41 can be switched by a switching knob 56 provided on the rear surface of the upper outer housing 4.

[0016] A cylinder 43 is held in the rear of the inner housing 2. The cylinder 43 is inserted coaxially into the rear of the tool holder 35. A piston 44 is housed in the cylinder 43 so as to be movable back and forth. An eccentric pin 45 protrudes from the upper part 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 in front of the piston 44 via an air chamber 47 so as to be movable back and forth. An impact bolt 49 is provided in the tool holder 35 in front of the striker 48. A bit B inserted into the front end of the tool holder 35 abuts against the impact bolt 49. An operation sleeve 50 for attaching and detaching the bit B is fitted to the front of the tool holder 35.

[0017] In the hammer drill 1, when the switch lever 30 is pressed, the main switch 21 is turned ON. When the machine-side controller 13 receives an ON signal from the main switch 21 via the main lead wire 24, it supplies power to the motor 7 to rotate the rotating shaft 8. This rotates the crankshaft 37, which moves the piston 44 back and forth via the connecting rod 46. As a result, the linked striker 48 strikes the bit B via the impact bolt 49. When the switching sleeve 41 is switched to the backward position by operating the switching knob 56, the hammer drill mode is set in which rotation is transmitted from the intermediate shaft 36 to the tool holder 35 via the second bevel gear 42. When the switching sleeve 41 is switched to the forward position, the hammer mode is set in which only impact is performed without the tool holder 35 rotating.

[0018] Next, the dust collecting attachment 60 will be described. The dust collection attachment 60 has a box-shaped casing 61. The casing 61 includes a main body 62, a front protruding portion 63, and a rear protruding portion 64. The main body 62 extends in the vertical direction, and the front protruding portion 63 extends forward from an upper portion of the main body 62. A dust box 65 is detachably attached to the front side of the main body 62 and the lower side of the front protruding portion 63. The rear protruding portion 64 extends rearward from a lower portion of the main body 62. The main body 62 and the rear protruding portion 64 are attachable to the hammer drill 1. A pair of dust-collection side coupling parts 66, 66 are provided at the center in the left-right direction on the rear surface of the main body part 62. The dust-collection side coupling parts 66, 66 are rail-shaped with an L-shaped cross section extending upward from the upper surface of the rear protruding part 64, and as shown in Fig. 2, are respectively engaged from below with the locking grooves 15, 15 of the main body side coupling part 14. In this engaged state, the part of the main body side coupling part 14 forward of the locking grooves 15, 15 is located between the dust-collection side coupling parts 66, 66, and the front tube part 11 and the casing 61 are integrated in the front-rear direction. A fitting recess 67 into which the ball 17 fits is formed on the rear surface of the main body part 62 at the attachment position of the dust-collection attachment 60.

[0019] A pair of side plates 68, 68 are provided on both the left and right sides from the rear surface of the main body 62 to the upper surface of the rear protruding portion 64. The front cylindrical portion 11 of the hammer drill 1 can be fitted between the side plates 68, 68 from above. A vertically extending recess 70 is formed on the outer surface of each side plate 68. A hook plate 71 is housed in the recess 70. The hook plate 71 is a strip-shaped plate that fits into the recess 70 and extends vertically. As shown in FIG. 3, the inside of the middle part is connected to the recess 70 so as to be rotatable around a shaft 72 in the front-rear direction. The lower part of the hook plate 71 is pressed outward to the left and right by a coil spring 73 provided between the hook plate 71 and the inner surface of the recess 70. Thus, the hook plate 71 is in a locked position in which the upper part is biased inward to the left and right as shown by the solid line in FIG. 3. A locking claw 74 that protrudes inward is provided on the upper end of the hook plate 71. In the locked position, the locking claw 74 protrudes inward of the side plate 68 through a through hole 75 provided in the recess 70. The locking claw 74 can be locked to the locking recess 19 of the front tube part 11 at the attachment position of the dust collection attachment 60 to the hammer drill 1. When the lower portion of the hook plate 71 is pressed toward the recess 70, the hook plate 71 tilts to an unlocked position in which the locking claws 74 are separated from the locking recesses 19 as shown by the two-dot chain lines in FIG.

[0020] A receiving portion 76 is provided on the upper surface of the rear protruding portion 64. The receiving portion 76 abuts against the lower surface of the front tubular portion 11 at the attachment position of the dust collection attachment 60. A connecting tube 77 is provided on the upper surface of the rear protruding portion 64 behind the receiving portion 76 and protrudes upward. The connecting tube 77 is located in the center of the rear protruding portion 64 in the left-right direction and holds a male connector 78 facing upward. The connecting tube 77 is connected to the connecting port 28 on the lower surface of the front tubular portion 11 at the attachment position of the dust collection attachment 60, and connects the male connector 78 to the female connector 29 of the connecting port 28.

[0021] A duct 80 is provided in the front protruding portion 63. The front end of the duct 80 opens forward at the front surface of the front protruding portion 63. The duct 80 is routed rearward within the front protruding portion 63 and makes a U-turn within the main body portion 62, with the lower end opening at the front surface of the main body portion 62 below the front protruding portion 63. The front end of the duct 80 is an example of a suction portion of the present disclosure. The dust box 65 is a box-shaped body that is attached to the casing 61 from the front below the front protrusion 63. The dust box 65 is formed by hingedly connecting a lid 81 and a box body 82 at their lower ends. The lid 81 has a filter 83 on its front inner surface, and the box body 82 covers the filter 83 from the front. The dust box 65 is an example of a dust collection section of the present disclosure. A locking shaft 84 is provided in the left-right direction at the lower end of the front surface of the main body 62. A receiving recess 85 is formed in the left-right direction on the lower surface of the box main body 82. The dust box 65 is detachably attached to the casing 61 by engaging the receiving recess 85 with the locking shaft 84 and locking an elastic piece 86 provided on the upper end of the lid 81 to the lower surface of the front protrusion 63. The lid 81 is provided with 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 duct 80. The outlet 88 is provided on the rear side of the filter 83.

[0022] A motor housing chamber 90 is formed as a partition within the main body 62 behind the outlet 88. When the dust box 65 is attached, the outlet 88 abuts against an opening 91 provided on the front side of the motor housing chamber 90 and is connected to the motor housing chamber 90. A dust collection motor 92 is housed in the motor housing chamber 90. The dust collection motor 92 is held in a position with a rotating shaft 93 facing downward. A dust collection 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 that are radially outward of the dust collection fan 94. The dust collection fan 94 is an example of a fan of the present disclosure. Positive and negative lead wires 95, 95 connected to the dust collection motor 92 pass through the partition between the main body 62 and the rear protruding portion 64 and are drawn into the rear protruding portion 64. A dust collection side controller 96 equipped with a control circuit board (not shown) is provided inside the rear protruding portion 64. The lead wires 95, 95 are electrically connected to the dust collection side controller 96. The dust collection side controller 96 is electrically connected to the male connector 78 via a signal lead wire 97.

[0023] A battery mounting section 100 is provided on the rear protruding section 64. A battery pack 101, which serves as the power source for the dust collection attachment 60, can be slidably mounted from the rear into the battery mounting section 100. A terminal block 102 that electrically connects to the mounted battery pack 101 is provided inside the battery mounting section 100. The terminal block 102 is electrically connected to the dust collection side controller 96 via a power supply lead wire 103. The dust collection side controller 96 is provided with a notification lamp 98 exposed on the side surface of the rear protrusion 64. For example, an LED is used for the notification lamp 98. When the battery pack 101 is attached to the battery attachment section 100, the dust collection side controller 96 monitors the voltage of the battery pack 101. When the voltage value of the battery pack 101 falls below a predetermined value, the dust collection side controller 96 lights or blinks the notification lamp 98 to notify of a voltage drop.

[0024] In the dust collection system S configured as described above, the dust collection attachment 60, with the rear protruding portion 64 positioned below the front tube portion 11 of the hammer drill 1, vertically aligns the locking grooves 15, 15 of the main machine side coupling portion 14 with the dust collection side coupling portions 66, 66, and moves vertically relative to the hammer drill 1. Then, the dust collection side coupling portions 66, 66 fit into the locking grooves 15, 15 from below. At this time, the hook plates 71, 71 of the side plates 68, 68 interfere with the front tubular portion 11 moving downward relatively, and swing from the locked position to the unlocked position, allowing the dust collection attachment 60 to move relatively. Then, when the dust collection attachment 60 is at the attachment position, the locking claws 74 of the hook plates 71, which have returned to the locked position, respectively lock into the locking recesses 19 of the front tubular portion 11. This restricts the dust collection attachment 60 from moving downward relative to the hammer drill 1, and the attachment of the dust collection attachment 60 is completed. At this time, the ball 17 of the machine-side coupling portion 14 engages with the fitting recess 67 of the main body portion 62 at the attachment position of the dust collection attachment 60, generating a clicking action and pressing the main body portion 62 to suppress rattling in the coupled state. At the same time as this attachment is completed, the connection tube 77 of the rear protrusion 64 is connected to the connection port 28 of the front tube portion 11, and the male connector 78 is connected to the female connector 29. Thus, the sub-switch 22 is electrically connected to the dust-collection side controller 96 via the sub-lead wire 27 and the signal lead wire 97.

[0025] The bit B attached to the hammer drill 1 is a dust-suction bit having a dust-suction passage with a suction port opening at the front end at its axis and a hose attachment part (not shown) attached to its outer periphery. Therefore, a flexible hose 105 is connected between the front end of the duct 80 where suction force is generated in the dust collection attachment 60 and the hose attachment part. By connecting the flexible hose 105, a dust collection path R is formed through which air flows across the bit B and the dust collection attachment 60. As shown by the dotted arrow in Fig. 1, this dust collection path R is a path that leads from the bit B through the flexible hose 105, the duct 80, the dust box 65, and the motor housing chamber 90 to the exhaust port.

[0026] When working using the dust collection system S, the switch lever 30 of the hammer drill 1 is pressed while the tip of the bit B is pressed against the surface of the workpiece. Then, as described above, the sub-switch 22 is turned ON first. This ON signal is input to the dust collection side controller 96 via the sub-lead wire 27 and the signal lead wire 97. When the dust collection side controller 96 receives the ON signal, it supplies the power of the battery pack 101 obtained from the terminal block 102 via the power supply lead wire 103 to the dust collection motor 92 via the leads 95, 95. This drives the dust collection motor 92 to rotate the rotating shaft 93, which rotates the dust collection fan 94. Then, the dust collection path R becomes negative pressure, and a suction force is generated at the tip opening of the bit B.

[0027] Following the sub-switch 22, the main switch 21 is turned ON. This ON signal is input to the machine-side controller 13 via the main lead wire 24. When the machine-side controller 13 receives the ON signal, it supplies operating power to the motor 7 from the commercial power source obtained from the power cord 20. This drives the motor 7 to rotate the rotating shaft 8, which in turn rotates the intermediate shaft 36 and the crankshaft 37. Here, regardless of whether the hammer drill mode or the hammer mode is selected, the piston 44 always reciprocates, so that the bit B is struck by the linked striker 48 via the impact bolt 49. Here, the power supply path from the power cord 20 to the motor 7 via the main unit controller 13 is electrically separated from the power supply path from the battery pack 101 to the dust collection motor 92 via the dust collection controller 96. Also, interlocking means (sub-switch 22, sub-lead 27, signal lead 97) is provided for driving / stopping the dust collection motor 92 in conjunction with the ON / OFF operation of the main switch 21 while being electrically separated from the signal path of the main switch 21. Therefore, even if noise is generated in the dust collection motor 92, it is possible to prevent the generated noise from propagating to the power supply path of the hammer drill 1. As a result, the EMI standard test can be cleared, and noise countermeasures are not required.

[0028] Dust generated from the workpiece is sucked into the dust suction passage in the bit B and enters the duct 80 via the flexible hose 105. The dust then passes through the dust collection path R into the dust box 65, where it is captured by the filter 83 and stored in the box body 82. When the work is completed, the pushing operation of the switch lever 30 is released and the main switch 21 is turned OFF. When the machine side controller 13 confirms that the main switch 21 is turned OFF, it stops the power supply to the motor 7 and stops the operation of the hammer drill 1. On the other hand, when the sub-switch 22 is turned OFF as a result of the release of the pressing operation of the switch lever 30, the dust-collection side controller 96 confirms that the sub-switch 22 is OFF, and then waits for a preset delay time of several seconds to elapse before stopping the supply of power to the dust collection motor 92. Thus, the dust remaining in the dust collection path R when the hammer drill 1 stops operating can be stored in the dust box 65.

[0029] When removing the dust collection attachment 60 from the hammer drill 1, the lower parts of the left and right hook plates 71, 71 are pushed in to move each hook plate 71 to the unlocked position. This disengages each locking claw 74 from the locking recess 19 of the front tubular portion 11, allowing relative movement of the dust collection attachment 60. Thus, the dust collection attachment 60 is moved relatively away from the hammer drill 1 in the opposite direction to when it was attached. This causes the dust collection side coupling parts 66, 66 to disengage from the locking grooves 15, 15 of the main body side coupling part 14 and move away downward. In this manner, removal of the dust collection attachment 60 is completed. When disposing of the dust stored in the dust box 65, the elastic piece 86 is pushed down to release the engagement with the front protrusion 63. Then, the dust box 65 can be removed from the casing 61 by simply tipping the dust box 65 forward about the engagement shaft 84. When the lid 81 is opened, the dust stored inside the box body 82 can be disposed of.

[0030] Next, a case where the dust collecting attachment 60 is attached to a hammer drill of a different shape using an adapter will be described. The hammer drill 1A shown in Fig. 4 has a main body side coupling portion 14, which is the same as that of the hammer drill 1 described above, on the front surface of the front tube portion 11. The hammer drill 1A is an example of the second power tool in the first configuration of the present disclosure, and is an example of the power tool related to the second configuration. The hammer drill 1A has a shorter vertical dimension of the front tubular portion 11 than the hammer drill 1, and when the receiving portion 76 provided on the upper surface of the rear protruding portion 64 of the dust collection attachment 60 abuts against the lower surface of the front tubular portion 11, the positions of the locking claw 74 of the hook plate 71 and the locking recess 19 of the front tubular portion 11 are shifted vertically, and the locking recess 19 is located below the locking claw 74. Furthermore, when the main machine side coupling portion 14 is engaged with the dust collection side coupling portion 66, the positions of the locking claw 74 and the locking recess 19 are shifted forward and backward, and the locking recess 19 is located forward of the locking claw 74.

[0031] Therefore, an adapter 200 is used here. 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. As shown in FIG. 5, the vertical plate portion 201 has a front joint portion 14A and rear joint portions 66A, 66A. The front joint portion 14A has the same shape as the main-machine-side joint portion 14 of the hammer drill 1, and has locking grooves 15A, 15A on the left and right sides, which are the same as the locking grooves 15, 15. The rear joint portions 66A, 66A have the same shape as the dust-collection-side joint portions 66, 66. A fitting recess 67A into which the ball 17 of the main-machine-side joint portion 14 fits is formed on the rear surface of the vertical plate portion 201. The front-rear distance between the locking groove 15A of the front joint portion 14A and the rear joint portion 66A is the same as the front-rear distance at which the locking claw 74 shifts rearward from the locking recess 19 when the main-machine-side joint portion 14 and the dust-collection-side joint portion 66 are directly joined without using the adapter 200.

[0032] The horizontal plate portion 202 has, on its upper surface, an upper receiving portion 203 having the same shape as the receiving portion 76. The vertical distance from the lower surface of the horizontal plate portion 202 to the upper surface of the upper receiving portion 203 matches the vertical distance at which the locking claw 74 shifts upward beyond the locking recess 19 when the main unit side coupling portion 14 and the dust collection side coupling portion 66 are directly coupled without using the adapter 200. An intermediate cylinder 204 is provided in the vertical direction at the rear of the upper receiving portion 203 and in the left-right center of the horizontal plate portion 202. The upper end of the intermediate cylinder 204 can be fitted into the connection port 28 of the hammer drill 1A. The lower end of the intermediate cylinder 204 can be fitted into the connection cylinder 77 of the dust collection attachment 60. A connecting fitting 205 is held in the intermediate tube 204. The connecting fitting 205 has a male portion 206 at its upper end and a female portion 207 at its lower end. The male portion 206 can be inserted into and connected to the female connector 29 of the connection port 28. The male connector 78 of the connecting tube 77 can be inserted into and connected to the female portion 207.

[0033] When the dust collection attachment 60 is attached to the hammer drill 1A using this adapter 200, first, the adapter 200 is attached to the dust collection attachment 60. The front joint portion 14A of the vertical plate portion 201 of the adapter 200 is moved relatively downward from above the dust collection side joint portions 66, 66 and slid until the receiving portion 76 of the rear protrusion portion 64 abuts against the lower surface of the horizontal plate portion 202. Then, the dust collection side joint portions 66, 66 are engaged with the engaging grooves 15A, 15A of the front joint portion 14A to connect the vertical plate portion 201 to the main body portion 62, and the connecting tube 77 is inserted into the intermediate tube 204, and the male connector 78 is inserted into and connected to the female portion 207 of the connecting fitting 205.

[0034] Next, the machine-side coupling part 14 of the hammer drill 1A is moved relatively downward from above the rear coupling parts 66A, 66A of the adapter 200 until the upper receiving part 203 of the horizontal plate part 202 abuts against the underside of the front tube part 11. Then, the rear coupling parts 66A, 66A engage with the locking grooves 15, 15 of the machine-side coupling part 14 to couple the vertical plate part 201 to the front tube part 11, and the locking claws 74 of the hook plate 71 engage with the locking recesses 19 to attach the dust collection attachment 60 to the hammer drill 1A. At the same time, the intermediate tube 204 is inserted into the connection port 28, and the male part 206 of the connection fitting 205 is inserted into the female connector 29 to connect. In this way, the hammer drill 1A and the dust collection attachment 60 are coupled 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-lead wire 27, the connecting fitting 205, and the signal lead wire 97. The front coupling portion 14A and the rear coupling portion 66A of the adapter 200 are an example of a mechanical coupling portion of the present disclosure. The connecting fitting 205 of the adapter 200 is an example of an electrical connection portion of the present disclosure.

[0035] In the dust collection attachment 60 and dust collection system S of the above-mentioned Example 1, a casing 61 is provided with a detachable adapter 200 which can be attached to the hammer drill 1A, and the adapter 200 includes a front connecting portion 14A and a rear connecting portion 66A which can be connected to the casing 61 and the hammer drill 1A, and a connecting fitting 205 which connects to the hammer drill 1A and electrically connects the dust collection attachment 60 and the hammer drill 1A. According to this configuration, even if the self-suction type has the dust collection motor 92 and the dust collection fan 94, it is possible to mechanically couple to the hammer drill 1 and the hammer drill 1A, respectively, and also to electrically connect them.

[0036] The connecting fitting 205 electrically connects the main switch 21 provided in the hammer drill 1A to a dust-collection side controller 96 provided in the casing 61 for controlling the dust-collection motor 92. Therefore, the dust collection motor 92 can be driven in conjunction with the ON / OFF operation of the main switch 21 of the hammer drill 1A. The adapter 200 can be attached to the casing 61 and the hammer drill 1A by relative movement in the same direction, that is, the up-down direction. Therefore, even when the adapter 200 is used, the casing 61 can be attached to the hammer drill 1A smoothly and in a short time.

[0037] In the front-rear direction, an attachment surface for the hammer drill 1A is provided on the side of the adapter 200 opposite to the attachment surface for the casing 61. In this embodiment, the attachment surface for the hammer drill 1A is provided on the rear side of the attachment surface for the casing 61, which is the front side. Therefore, the two mounting surfaces can be easily distinguished, and the mounting of the adapter 200 to the casing 61 and the mounting of the adapter 200 to the hammer drill 1A can be performed in the correct order without error. The front coupling portion 14A and the rear coupling portion 66A of the adapter 200 and the connecting fitting 205 are provided on different surfaces. Therefore, the mechanical coupling parts and the electrical connection parts to the casing 61 and the hammer drill 1A can be arranged without interfering with each other. The casing 61 has a shape that spans from the front to the bottom of the hammer drill 1A, and the front connecting portion 14A and the rear connecting portion 66A of the adapter 200 are provided between the rear surface of the casing 61 and the front surface of the hammer drill 1A, and the connecting fitting 205 is provided between the upper surface of the casing 61 and the lower surface of the hammer drill 1A. Therefore, the mechanical joints and electrical connections to the casing 61 and the hammer drill 1A can be easily made in a space-saving manner by utilizing the shape of the casing 61. EXAMPLES

[0038] In the above embodiment 1, the hammer drill is an AC machine, but the adapter of the present disclosure can also be applied to a hammer drill that is a DC machine that uses a battery pack as a power source. The hammer drill 1B shown in FIG. 6 has a lower housing 51 integral with the handle portion 12 below the motor housing 3. A main-machine-side battery mounting portion 52 is provided at the rear of the lower housing 51. Two main-machine-side battery packs 53, 53 are slid from the left side into the main-machine-side battery mounting portion 52. The rated voltage (e.g., 40 V) of each main-machine-side battery pack 53 is higher than the rated voltage (e.g., 18 V) of the battery pack 101 of the dust collection attachment 60. The main-machine-side controller 13 is provided in front of the main-machine-side battery mounting portion 52 in the lower housing 51. The hammer drill 1B is another example of the second electric power tool in the first configuration of the present disclosure, and is another example of the electric power tool according to the second configuration. The main-machine-side battery pack 53 is an example of the main-machine-side battery of the present disclosure. The battery pack 101 is an example of the dust collection-side battery of the present disclosure.

[0039] No sub-switch is provided in the handle section 12, and only the main switch 21 is provided. The main switch 21 and the main unit controller 13 are electrically connected via a main lead wire 24. The main unit battery mounting section 52 is provided with terminal blocks (not shown) at the front and rear to which the two mounted main unit battery packs 53, 53 are electrically connected. These terminal blocks are electrically connected to the main unit controller 13 via the main unit second lead wires 54, 54, respectively. 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 device-side controller 13 via a device-side third lead wire 55.

[0040] The vertical plate portion 201 of the adapter 200A has the same structure as the adapter 200 of the first embodiment. The horizontal plate portion 202 accommodates a converter 208 therein. A connection recess 209 is formed in the center in the left-right direction on the rear lower surface of the horizontal plate portion 202. The connection recess 209 is capable of receiving the connection tube 77 of the rear protrusion 64. The connection recess 209 is provided with a female terminal 210 into which the male connector 78 of the connection tube 77 is inserted for connection. A connection protrusion 211 is formed in the left-right center of the front upper surface of the horizontal plate portion 202. The connection protrusion 211 is capable of fitting into the connection port 28 of the front cylindrical portion 11. The connection protrusion 211 is provided with a male terminal 212 that 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 by internal lead wires 213, 213, respectively.

[0041] When the dust collection attachment 60 is attached to the hammer drill 1B using this adapter 200A, first, the adapter 200A is attached to the dust collection attachment 60. As in the first embodiment, the front joint 14A of the vertical plate portion 201 of the adapter 200A is moved relatively downward from above the dust collection side joints 66, 66 until the receiving portion 76 of the rear protrusion 64 abuts against the lower surface of the horizontal plate portion 202. Then, as shown in Fig. 7, the dust collection side joints 66, 66 are engaged with the engaging grooves 15A, 15A of the front joint portion 14A, and the vertical plate portion 201 is joined to the main body portion 62. At the same time, the connecting tube 77 fits into the connecting recess 209, and the male connector 78 is inserted into the female terminal 210 for connection. Next, the machine-side coupling part 14 of the hammer drill 1B is moved relatively downward from above the rear coupling parts 66A, 66A of the adapter 200A until the upper surface of the horizontal plate part 202 abuts against the lower surface of the front tubular part 11. Then, the rear coupling parts 66A, 66A engage with the locking grooves 15, 15 of the machine-side coupling part 14, and the vertical plate part 201 is coupled to the front tubular part 11. At the same time, the locking claws 74 of the hook plate 71 engage with the locking recesses 19, and the dust collection attachment 60 is attached to 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 for connection.

[0042] Thus, the hammer drill 1B and the dust collection attachment 60 are coupled via the adapter 200A. At the same time, the main machine side controller 13 and the dust collection side controller 96 are electrically connected via the main machine side third lead wire 55, the internal lead wire 213, the converter 208, the internal lead wire 213, and the signal lead wire 97. In this second embodiment, when the remaining capacity of the battery pack 101 on the dust collection attachment 60 side decreases and a voltage sufficient to drive the dust collection motor 92 cannot be obtained, the main unit controller 13, which has received information from the dust collection side controller 96, supplies power from the main unit side battery pack 53 to the dust collection motor 92. At this time, the power supply voltage of the main unit side battery pack 53 is stepped down by the converter 208 and applied to the dust collection motor 92 at a power supply voltage suitable for the dust collection motor 92.

[0043] In the dust collection attachment 60 and dust collection system S of the above-mentioned Example 2, the casing 61 also has a detachable adapter 200A that can be attached to the hammer drill 1B, and the adapter 200A includes a front connecting portion 14A and a rear connecting portion 66A that can be connected to the casing 61 and the hammer drill 1B, and electrical connection portions (female terminal 210, internal lead wire 213, converter 208, internal lead wire 213, male terminal 212) that electrically connect the dust collection attachment 60 and the hammer drill 1B in addition to being connected to the hammer drill 1B. According to this configuration, even if the self-suction type has the dust collection motor 92 and the dust collection fan 94, it is possible to mechanically couple to the hammer drill 1 and the hammer drill 1B, respectively, and also to electrically connect them.

[0044] In particular, the electrical connection portion (female terminal 210, internal lead wire 213, converter 208, internal lead wire 213, male terminal 212) enables power to be supplied from the hammer drill 1B. Therefore, even if the adapter 200A is used, the power source of the hammer drill 1B can be used as the power source of the dust collection attachment 60, improving usability. The hammer drill 1B is provided with a main body side battery pack 53 which serves as a power source, the casing 61 is provided with a battery pack 101 having a rated voltage different from that of the main body side battery pack 53, and the adapter 200A is provided with a converter 208 which converts the rated voltage of the main body side battery pack 53 into the rated voltage of the battery pack 101. Therefore, even if the hammer drill 1B has a main battery pack 53 with a different rated voltage, the dust collection attachment 60 can utilize the power source of the main battery pack 53. EXAMPLES

[0045] 8 has one main-machine-side battery pack 53 slidably mounted from the rear into main-machine-side battery mounting section 52 of lower housing 51. The rated voltage of main-machine-side battery pack 53 is the same as that of battery pack 101 on the dust collection attachment 60 side. The hammer drill 1C is another example of the second power tool in the first configuration of the present disclosure, and another example of a power tool related to the second configuration. The vertical plate portion 201 of the adapter 200B is the same as that of the second embodiment. However, the horizontal plate portion 202 is not provided with a converter, and the female terminal 210 and the male terminal 212 are directly electrically connected by an internal lead wire 213. The main unit controller 13 is accommodated in the upper front portion of the lower housing 51 in a position extending in the front-rear direction. When the dust collection attachment 60 is attached to the hammer drill 1C using this adapter 200B, first, the adapter 200B is attached to the dust collection attachment 60. As in the second embodiment, the front joint 14A of the vertical plate portion 201 of the adapter 200B is moved relatively downward from above the dust collection side joints 66, 66, and slid until the receiving portion 76 of the rear protrusion 64 abuts against the lower surface of the horizontal plate portion 202. Then, as in FIG. 7, the front joint 14A and the dust collection side joints 66, 66 engage with each other to join the vertical plate portion 201 to the main body portion 62, and the connecting tube 77 is inserted into the connecting recess 209, and the male connector 78 is inserted into and connected to the female terminal 210.

[0046] Next, the machine-side coupling portion 14 of the hammer drill 1C is moved relatively downward from above the rear coupling portions 66A, 66A of the adapter 200B until the upper surface of the horizontal plate portion 202 abuts against the lower surface of the front tubular portion 11. Then, the rear coupling portions 66A, 66A and the machine-side coupling portion 14 are engaged with each other to couple the vertical plate portion 201 to the front tubular portion 11, and the locking claws 74 of the hook plate 71 are engaged with the locking recesses 19 to attach the dust collection attachment 60 to 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 for connection. Thus, the hammer drill 1C and the dust collection attachment 60 are coupled via the adapter 200B. At the same time, the main unit controller 13 and the dust collection controller 96 are electrically connected via the main unit third lead wire 55, the internal lead wire 213, and the signal lead wire 97. In this embodiment 3, when the remaining capacity of the battery pack 101 on the dust collection attachment 60 side decreases and a voltage sufficient to drive the dust collection motor 92 can no longer be obtained, the main unit side controller 13 receives information from the dust collection side controller 96 and supplies power from the main unit side battery pack 53 to the dust collection motor 92.

[0047] In the dust collection attachment 60 and dust collection system S of Example 3 described above, the casing 61 also has a detachable adapter 200B which can be attached to the hammer drill 1C, and the adapter 200B includes a front connecting portion 14A and a rear connecting portion 66A which can be connected to the casing 61 and the hammer drill 1C, and electrical connecting portions (female terminal 210, internal lead wire 213, male terminal 212) which electrically connect the dust collection attachment 60 and the hammer drill 1C in addition to being connected to the hammer drill 1C. According to this configuration, even if the self-suction type has the dust collection motor 92 and the dust collection fan 94, it is possible to mechanically couple to the hammer drill 1 and the hammer drill 1C, respectively, and also to electrically connect them. In particular, the hammer drill 1C is provided with a main body side battery pack 53 which serves as a power source, and the casing 61 is provided with a battery pack 101 having the same rated voltage as the main body side battery pack 53, and the dust collection side controller 96 can be operated by either the main body side battery pack 53 or the battery pack 101 to control the dust collection motor 92. Therefore, even if the remaining capacity of the battery pack 101 runs out, the dust collection motor 92 can be driven using the main battery pack 53 as a power source.

[0048] Modifications of the present disclosure will be described below. In the above embodiments, the main body side joint is a ridge and the dust collection side joint is a pair of rails, but this may be reversed. In this case, the front joint of the adapter is also a pair of rails and the rear joint is a ridge. However, the ridges may also be a pair of rails, and the mechanical joint may be performed between the pair of rail-shaped joints. In the above embodiments, the hammer drill and the dust collection attachment are connected by the main body side connecting part and the dust collection side connecting part provided in the center in the left-right direction, but the main body side connecting part and the dust collection side connecting part may be provided on both the left and right sides, respectively. Similarly, the mechanical connecting part of the adapter may be provided on both the left and right sides. The main body side joint portion and the dust collection side joint portion are not limited to extending in the vertical direction. The joint portions separated into upper and lower parts may be engaged with each other. The front joint portion and the rear joint portion of the adapter may also be separated into upper and lower parts.

[0049] In the above embodiments, hook plates are provided on the left and right sides of the rear projection of the dust collection attachment in addition to the machine-side joint, dust collection-side joint, and mechanical joint of the adapter to lock the sliding of the dust collection attachment, but such a locking means may be provided on the main body. For example, a locking claw may be provided that protrudes from the main body and engages with the front surface of the hammer drill, and the locking claw may be retracted by a release operation on the main body. The ball and coil spring provided in the connecting portion on the main body side may be provided in the adapter. In each of the above embodiments, an example has been described in which the dust collection attachment is attached to one type of hammer drill using an adapter, but the dust collection attachment may be attached to two or more types of hammer drills using an adapter.

[0050] In the hammer drill, the position and orientation of the motor and the position and orientation of the machine-side controller are not limited to those in the above-described embodiments. For example, the motor may be oriented so that the rotation shaft faces forward or faces diagonally forward. The structure of the striking mechanism is not limited to those in the above-mentioned embodiments. The operation mode may be one in which a drill mode can be selected. The power tool is not limited to a hammer drill, but may be another power tool such as an electric hammer. In the above embodiments, a dust-collecting bit is used as the tip tool attached to the power tool, but the tip tool does not have to be a dust-collecting bit. In this case, a separate cylindrical attachment that covers the outside of the tip tool may be attached to the tip of the power tool, and a hose attachment part provided on the attachment and the suction part of the dust-collecting attachment may be connected by a flexible hose.

[0051] The attachment direction of the dust collection attachment to the power tool is not limited to the up-down direction, but may be, for example, the front-rear direction. In the dust collection attachment, the position and orientation of the dust collection motor and the position and structure of the dust box are not limited to those in the above embodiment. For example, the dust collection motor may be housed with the rotating shaft facing upward or sideways. The dust collection motor and the fan shaft may be separate, and rotation may be transmitted from the rotating shaft of the dust collection motor to the shaft of the fan. The dust collecting section is not limited to a dust box, and may be a cyclone structure without a filter. Therefore, the dust collecting path can be changed as appropriate. The battery pack may be attached to the battery attachment portion of the dust collection attachment by sliding it from the side instead of from the rear. In the dust collection attachment, the connection part of the flexible hose may be at another position such as the top surface or side surface instead of the front surface of the casing. However, the dust collection attachment may not use a flexible hose. For example, the dust collection attachment may have a cylindrical slide part that protrudes from the casing with a dust collection path provided therein, and a suction port through which a tool tip passes is provided at the tip of the slide part. [Explanation of symbols]

[0052] 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 cylinder, 12·· handle, 13·· main body controller, 14·· main body coupling, 15·· locking groove, 19·· locking recess, 20·· power cord, 21·· main switch, 22·· sub switch, 24·· main lead wire, 27·· sub lead wire, 29·· female connector, 30·· switch lever, 35·· tool holder, 44·· piston, 48·· striker, 49·· impact bolt, 51·· lower housing, 52·· main body bolt battery attachment portion, 53··machine side battery pack, 60··dust collection attachment, 61··casing, 62··main body, 65··dust box, 66··dust collection side connection portion, 71··hook plate, 78··male connector, 83··filter, 92··dust collection motor, 94··dust collection fan, 96··dust collection side controller, 97··signal lead wire, 101··battery pack, 103··power supply lead wire, 200, 200A, 200B··adapter, 201··vertical plate portion, 202··horizontal plate portion, 14A··front connection portion, 15A··locking groove, 66A··rear connection portion, 208··converter, B··bit, R··dust collection path, S··dust collection system for power tools.

Claims

1. A dust collection attachment comprising a casing, a suction unit, a dust collection unit for capturing dust sucked from the suction unit, a fan for generating suction force in the suction unit, and a dust collection motor for rotating the fan, wherein the casing is attachable to a first power tool, The casing is detachably provided with an adapter that can be attached to at least a second power tool, and the adapter is A dust collection attachment for a power tool, characterized by comprising: a casing and a mechanical coupling portion that can be coupled to the second power tool; and an electrical coupling portion that electrically connects the dust collection attachment and the second power tool together with the coupling to the second power tool.

2. The power tool dust collection attachment according to claim 1, characterized in that the electrical connection part electrically connects a switch provided on the second power tool and a dust collection side controller provided inside the casing for controlling the dust collection motor.

3. The dust collection attachment for power tools according to claim 2, characterized in that the electrical connection part is capable of receiving power from the second power tool.

4. The second power tool is equipped with a main unit battery that serves as the power source, and the casing is equipped with a dust collection battery having the same rated voltage as the main unit battery. The dust collection controller is characterized in that it can be operated by either the main unit battery or the dust collection battery to control the dust collection motor, as described in claim 3.

5. The second power tool is equipped with a main unit battery that serves as the power source, and the casing is equipped with a dust collection battery with a different rated voltage from the main unit battery. The dust collection attachment for power tools according to claim 3, characterized in that the adapter is provided with a converter that converts the rated voltage of the main unit's battery to the rated voltage of the dust collection battery.

6. The dust collection attachment for a power tool according to any one of claims 1 to 5, characterized in that the adapter can be attached to the casing and the second power tool by relative movement in the same direction.

7. The dust collection attachment for a power tool according to claim 6, characterized in that a mounting surface for the second power tool is provided on the side of the adapter opposite to the mounting surface for the casing, in a direction intersecting the aforementioned same direction.

8. The dust collection attachment for power tools according to any one of claims 1 to 5, characterized in that the mechanical coupling portion and the electrical connection portion in the adapter are provided on different surfaces from each other.

9. The dust collection attachment for a power tool according to claim 8, characterized in that the casing has a shape that spans from the front to the bottom of the second power tool, the mechanical coupling portion of the adapter is provided between the rear surface of the casing and the front surface of the second power tool, and the electrical connection portion is provided between the upper surface of the casing and the lower surface of the second power tool.

10. A power tool to which a dust collection attachment for a power tool according to any one of claims 1 to 5 is attached via the adapter.

Images