JP2018012169A - Dust collector for power tool and power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the risk of damage to wiring due to an air flow for cooling a motor. A dust collector 50 for an electric tool has an exhaust port and can be mounted on a hammer drill 1. A main body case 51 in which a DC motor 88 and a dust collector fan 92 are installed and a filter 147 are installed internally. The dust box 52 and the connection port 68 provided in the main body case 51 are connected to the base end, and the front end is provided with a suction port 130 and has a tubular slide portion 53 that can slide in the front-rear direction. Due to the rotation of the dust fan 92, after passing through the filter 147 from the suction port 130, it passes through the accommodation chamber 61a of the DC motor 88 in the main body case 51 to form a dust collection path to the exhaust port, and the main body case 51 is formed. Inside, the flow path of the air flow passing through the accommodation chamber 61a of the DC motor 88 and the wiring (lead wires 75a, 88a, 98a) in the main body case 51 are partitioned to prevent the air flow from coming into contact with the wiring. A partition portion (inner rib 102, etc.) was provided. [Selection diagram] Fig. 2

Description

  The present invention relates to a dust collector for an electric tool that is attached to an electric tool such as an electric drill or a hammer drill, and an electric tool equipped with the dust collector.

  An electric power tool such as an electric drill or a hammer drill is equipped with a dust collecting device that collects and collects dust generated from a workpiece during a drilling operation or the like. As this dust collector for electric tools, the thing disclosed by patent document 1 is known. The dust collecting attachment (dust collecting device) disclosed herein has a dust box attached to the front, a dust collecting fan, motor, and controller at the lower rear part, and a suction port at the front end. It is equipped with a sliding part that extends and retracts forward and backward. Then, between the front surface of the power tool such as a hammer drill and the rear surface of the casing, a terminal that is electrically connected to each other in the mounted state is provided, and the power supply of the motor is obtained from the hammer drill simultaneously with the mounting of the dust collection attachment. I am doing so.

JP 2011-212833 A

  In the conventional dust collection attachment, since the lead wire wired from the electrically connected terminal to the rear controller is routed to the rear through the motor housing chamber, an air flow is used to cool the motor. When passing through the motor housing chamber, the air flow comes into contact with the lead wire. In this case, if fine dust that has passed through the filter on the upstream side is mixed, the dust may come into contact with the lead wire and be damaged.

  Accordingly, an object of the present invention is to provide a dust collector for an electric tool and an electric tool that can reduce the risk of damage to wiring due to an air flow that cools a motor.

In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a main body case that has an exhaust port and can be attached to an electric tool, and has a motor and a dust collecting fan, and a dust box that has a filter. The base end is connected to the connection port provided in the main body case, and the front end is provided with a suction port and a cylindrical slide part that is slidable in the front-rear direction. A dust collecting device for an electric tool in which a dust collecting path is formed which passes through the motor storage chamber in the main body case and then reaches the exhaust port after passing through the filter from
The main body case is provided with a partition portion for partitioning between a flow path of the air flow passing through the motor housing chamber and the wiring in the main body case to prevent contact between the air flow and the wiring. To do.
According to a second aspect of the present invention, in the configuration of the first aspect, the motor is housed in the main body case in a posture in which the output shaft is in the front-rear direction.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the dust box is disposed on the lower side of the main body case, and the motor is accommodated on the upper side of the dust box.
According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the main body case is formed by assembling a pair of left and right halved cases, and the partitioning portion stands on the inner surface of each of the halved cases. It is characterized by being formed by butting the provided ribs together.
According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a controller for controlling the motor is disposed in a rear portion of the motor housing chamber in the main body case.
In order to achieve the above object, the invention described in claim 6 is an electric tool, and is provided with the dust collecting device for an electric tool according to any one of claims 1 to 5. .

According to the first and sixth aspects of the present invention, by providing the partition portion for preventing contact between the airflow and the wiring in the main body case, the possibility of damage to the wiring due to the airflow for cooling the motor is reduced. be able to.
According to the second aspect of the invention, in addition to the effect of the first aspect, since the motor is accommodated in the front-rear direction, the air flow path and the wiring are easily partitioned in the motor accommodation chamber. can do.
According to the third aspect of the present invention, in addition to the effect of the first or second aspect, the dust box is disposed on the lower side and the motor is disposed on the upper side. It becomes a compact shape.
According to the invention of claim 4, in addition to the effect of any one of claims 1 to 3, the partition portion is formed by abutment of ribs erected on the inner surface of each half case, It becomes the rational structure in which a partition part is formed with the assembly of a half case.
According to the fifth aspect of the present invention, in addition to the effect of any one of the first to fourth aspects, the controller is disposed at the rear of the motor housing chamber, so that wiring with the motor is performed in the shortest distance. be able to.

It is a perspective view from the front of a dust collection system. It is a center longitudinal cross-sectional view of a dust collection system. It is an AA line expanded sectional view of only the main body housing in FIG. It is a perspective view from the front upper side of the dust collector for electric tools. It is a perspective view from the front lower side of the dust collector for electric tools. It is a front view of the dust collector for electric tools. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is a perspective view which shows attachment operation | movement of the dust box to a main body case. It is a perspective view which shows attachment operation | movement of the dust box to a main body case. It is side explanatory drawing which shows mounting | wearing operation | movement of the dust collector for electric tools to a hammer drill. It is side surface explanatory drawing of the dust collection system which provided the shielding board in the female connector of the hammer drill (the dust collector for electric tools is in the middle of attachment). It is side surface explanatory drawing of the dust collection system which provided the shielding board in the female connector of a hammer drill (the dust collector for electric tools is a mounting state).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front perspective view showing an example of a dust collection system S in which a power tool dust collector (hereinafter simply referred to as “dust collector”) is mounted on a hammer drill, which is a power tool, and FIG. FIG. 3 is an enlarged sectional view taken along line AA of only the main body housing.
(Explanation of hammer drill)
The hammer drill 1 is formed by screwing the left and right half housings 2a, 2b, and a tool holder 6 that is rotatable and can be moved back and forth at the front upper portion of the main body housing 2 that houses the brushless motor 3 and the like. A tapered front housing 5 that is arranged in parallel under 6 and accommodates a rotatable intermediate shaft 7 projects forward, and a switch 9 having a trigger 10 is provided on the upper rear side of the body housing 2. A handle 8 is provided. Reference numeral 11 denotes a battery pack that is slidably mounted on the rear lower portion of the main body housing 2 from the rear side to serve as a power source. The machine-side controller 12 is accommodated above the battery pack.

  The brushless motor 3 is housed in the main body housing 2 in an inclined posture with the rotary shaft 4 facing upward and obliquely rearward, and causes the first gear 13 provided at the tip of the rotary shaft 4 to protrude into the front housing 5. And meshed with a second gear 14 provided on the intermediate shaft 7. Reference numeral 15 denotes a centrifugal fan fixed to the rotating shaft 4. As the fan rotates, the outside air is sucked from the machine-side intake ports 16, 16... Formed on the left and right side surfaces of the main body housing 2 below the brushless motor 3. By exhausting from the machine side exhaust ports 17, 17... (FIG. 13) formed on the left and right side surfaces of the main body housing 2 outside the fan 15, an air flow for cooling the brushless motor 3 is generated.

  In front of the second gear 14, the intermediate shaft 7 has a boss sleeve 18 that can rotate separately from the intermediate shaft 7, a clutch 19 that rotates integrally with the intermediate shaft 7 and can slide back and forth, and can slide forward and backward. A third gear 20 is provided, which is disengaged from the intermediate shaft 7 at the position, and rotates integrally with the intermediate shaft 7 at the retracted position. The clutch 19 moves back and forth in cooperation with the tool holder 6 via a locking plate 21 provided on the tool holder 6, and meshes with the boss sleeve 18 in the rearward sliding position.

An inner housing 22 that supports the rear ends of the tool holder 6 and the intermediate shaft 7 is held inside the front housing 5, and the tool holder 6 is moved to a forward position by a coil spring 23 provided between the inner housing 22. Protrusively biased. A fourth gear 24 that meshes with the third gear 20 of the intermediate shaft 7 is provided on the outer periphery of the tool holder 6.
A piston cylinder 25 is accommodated in the rear side inside the tool holder 6 so as to be movable back and forth, and a rear end is connected to an arm 26 provided on the boss sleeve 18. A striker 28 is accommodated in the piston cylinder 25 via an air chamber 27 so as to be able to reciprocate back and forth. An impact bolt 29 is accommodated in front of the striker 28 and can come into contact with the rear end of a bit (not shown) inserted into the front end of the tool holder 6. An operation sleeve 30 for attaching and detaching the bit is provided at the front end of the tool holder 6, and a side handle 31 is provided at the front end of the front housing 5 behind the bit.

  A mode switching lever 32 is provided on the left side surface of the front housing 5. By rotating the mode switching lever 32, the tool holder 6 is restrained from retreating and the clutch 19 is maintained at the forward position away from the boss sleeve 18. A drill mode in which the third gear 20 is coupled to the intermediate shaft 7, a hammer drill mode in which the retraction of the tool holder 6 is not restricted and can be moved together with the clutch 19 to the retreat position, and the moved clutch 19 meshes with the boss sleeve 18; Retraction of the holder 6 is not restricted, and it is possible to select a hammer mode that can move to the retreat position together with the clutch 19 and that the third gear 20 moves forward and the rotation of the intermediate shaft 7 is not transmitted. That is, in the drill mode, only the tool holder 6 is rotated by driving the brushless motor 3, and in the hammer drill mode, in addition to the rotation of the tool holder 6, the boss sleeve 18 is rotated to reciprocate the piston cylinder 25. Hits the impact bolt 29. In the hammer mode, only the boss sleeve 18 rotates and strikes the impact bolt 29.

The front lower portion of the main body housing 2 in front of the battery pack 11 is a connecting portion 33 to which the dust collecting device 50 is connected. Inside the connecting portion 33, three female terminals for power supply and communication are used. A female connector 34 having 35, 35,... Arranged side by side in the left-right direction is provided with the opening facing downward, and a rectangular insertion port 36 is formed below the female connector 34 on the lower surface of the connecting portion 33. ing. As shown in FIG. 3, a support pin 37 is integrally connected to the upper left side of the female connector 34, and a cylindrical portion 38 coaxial with the support pin 37 is formed on the upper right side.
The support pin 37 is rotatably supported by a receiving recess 39 formed on the inner surface of the half housing 2a, and a boss 40 protruding from the half housing 2b is inserted into the cylindrical portion 38. Therefore, the female connector 34 is centered on the support pin 37 and the boss 40, and has a downward position where the opening is directly above the insertion port 36, and the opening is spaced backward from the insertion port 36 so as to be a stopper in the connecting portion 33. It can be swung between a tilting position that tilts until it abuts on 41. A torsion spring 42 is wound around the support pin 37, and one end is locked to the inner surface of the half housing 2a and the other end is locked to the female connector 34, and the female connector 34 is biased to the tilted position.

Further, at the lower end of the female connector 34, the female connector 34 is located at a position just above the insertion port 36 at the tilting position and closes the insertion port 36 from the inside. A shutter member 43 serving as an open position for retracting from directly above 36 is integrally provided. A pair of guide grooves 44, 44 are recessed in the vertical direction in front of the support pin 37 on the left and right side surfaces of the connecting portion 33, and from a through hole 45 formed on the rear inner surface of the left guide groove 44, An interlocking piece 46 protruding in a radial direction from the support pin 37 protrudes at a tilt position of the female connector 34 (closed position of the shutter member 43).
Further, a locking recess 47 that opens downward is formed behind the insertion port 36, and an engaging claw 48 is provided forward on the lower end of the rear inner surface of the locking recess 47. A leaf spring 49 having a U-shape when viewed from the side is housed behind the engaging claw 48 so as to wind the screw boss from below, and the rear end protrudes from the rear surface of the connecting portion 33. The leaf spring 49 elastically presses the front surface of the mounted battery pack 11 to prevent rattling during mounting.

(Description of dust collector)
As shown in FIGS. 4 to 7, the dust collector 50 is formed by screwing the left and right half cases 51 a and 51 b, and is attachable to and detachable from the main body case 51 attached to the hammer drill 1. And a cylindrical slide portion 53 that is connected to the main body case 51 and guides the dust sucked from the processing position to the dust box 52.
First, the main body case 51 is a box-shaped body having a front plate portion 54, a rear plate portion 55, an upper plate portion 56, a lower plate portion 57, and left and right side plate portions 58, 58. In the lower part, an accommodation recess 59 for accommodating the dust box 52 is formed by being recessed backward leaving the side plate portions 58 and 58. Further, at the lower part of the main body case 51, there is formed a coupling convex portion 60 that protrudes rearward together with the side plate portions 58, 58 and to which the coupling portion 33 of the hammer drill 1 is coupled.

The housing recess 59 is bent rearward from the lower end of the front plate portion 54, partitions between the body case 51 and the housing recess 59, and forms a housing chamber 61a of the DC motor 88 on the upper side, and a partition It is a space surrounded by the bottom plate 62 that is bent downward from the rear end of the plate 61 and connected to the lower plate portion 57 and the left and right side plate portions 58 and 58. The partition plate 61 is formed with a concave portion 63 having a dust collection side intake port 64 at the center. A resin ring 65 and a mesh 67 are formed in the center hole in the recess 63 below the dust collection side intake port 64. The stretched resin-made upper ring 66 is coaxially held, and the upper ring 66 projects downward from the lower surface of the partition plate 61.
Further, as shown in FIG. 8, the left side plate portion 58 is formed with a connection port 68 having a ring-shaped rising portion 69 around the outer surface side. The connection port 68 is made of resin from the inside. A lateral ring 70 is fitted. In the center of the front plate portion 54 at the front end of the partition plate 61, a relief portion 71 having a lower end protruding below the partition plate 61 is recessed. The lower plate portion 57 projects forward from the bottom plate 62, and a support shaft 72 using a screw boss is formed in the left-right direction at the front end.

  A fitting recess 73 into which the connecting portion 33 of the hammer drill 1 can be fitted is formed between the left and right side plate portions 58 and 58 above the coupling protrusion 60. A male connector 74 in which three male terminals 75, 75,... Corresponding to the female terminals 35, 35,. Projecting upward. In the coupling convex part 60, the lower end is rotatably supported by a left and right axis 77, and a rearward hook part 78 provided at the upper end is fitted through the through hole 79 provided in the rear plate part 55. A hook plate 76 protruding into the mating recess 73 is provided. The hook plate 76 can be swung back and forth by the front-rear width of the through-hole 79, but a release button 80 provided on the upper side of the shaft 77 and exposed from the window 81 provided on the rear plate portion 55 is coupled. By being pushed backward by a coil spring 82 provided in the convex portion 60, it is urged to a swinging position to the rear side. A cover 83 covers the through-hole 79, and a plate spring 84 that is curved upward is held behind the hook plate 76.

Further, on the inner surfaces of the left and right side plate portions 58 and 58 in front of the male connector 74, upward facing rail portions 85 and 85 are formed. The rail portions 85, 85 are provided at positions where the rail portions 85, 85 are fitted into the guide grooves 44, 44 provided on the side surfaces of the hammer drill 1 in the coupled state of the connecting portion 33.
Further, a concave surface portion 86 is formed on the upper surface of the upper plate portion 56 so as to match the shape of the lower surface of the front housing 5 of the hammer drill 1. An abutting piece 87 that abuts the front end surface 5a in the direction protrudes upward.

  On the other hand, at the center in the left-right direction in the main body case 51 above the partition plate 61, as shown in FIG. 8, a DC motor 88 is provided to project from the inner surfaces of the left and right half cases 51a, 51b. The pair of upper and lower holding ribs 90 and 90 are accommodated in a forward-facing posture with the output shaft 89 facing forward via rubber pins 91 and 91 held at the tips thereof. A dust collecting fan 92, which is a centrifugal fan, is fixed to the output shaft 89, and a plurality of dust collecting side exhaust ports 93, 93,... Are formed on the right side plate portion 58 outside the dust collecting fan 92. Yes. 94 is a baffle plate that is provided between the DC motor 88 and the dust collecting fan 92 and guides air from the center side to the outer peripheral side, and 95 is provided so as to protrude inside the front plate portion 54 and is a bearing 96 of the output shaft 89. It is a circular rib which holds.

  Further, an LED 97 is provided above the circular rib 95 and in the center in the left-right direction of the front plate portion 54. The LED 97 is mounted on the board 98 and is housed forward together with the board 98 in a holding cylinder 99 projecting obliquely upward from the front plate portion 54 as shown in FIGS. A lens 100 is provided in front of the LED 97 and at the front end of the holding cylinder 99 so that the light from the LED 97 can be irradiated obliquely upward.

Further, the dust collecting controller 101 is accommodated vertically in the left-right direction behind the DC motor 88 in the accommodation chamber 61a, and leads from the male terminal 75 and the positive and negative terminals of the DC motor 88 are accommodated. The wires 88a and 88a and the lead wire 98a from the substrate 98 are connected to the dust collecting side controller 101, respectively.
Here, the left half case 51a rises at a predetermined interval from the partition plate 61 inside the front plate portion 54, rises along the front plate portion 54 except for the circular rib 95, and then the upper plate portion. An inside of the inverted U-shape that is retracted along the upper plate portion 56 at a predetermined interval inside 56 and descends through the rear end of the DC motor 88 in front of the dust collecting side controller 101 and is connected to the partition plate 61. Ribs 102 are erected. As shown in FIGS. 8 and 9, a semicircular cutout 103 is formed in the inner rib 102 at the position where the DC motor 88 passes.

On the other hand, in the right half case 51b, the circular rib 95 rises at a position facing the front side of the inner rib 102 at a predetermined interval from the partition plate 61 inside the front plate portion 54 as shown in FIG. A front vertical rib 104 that rises along the front plate portion 54 and is connected to the upper plate portion 56 is provided upright.
Further, a rear vertical rib 105 rising from the partition plate 61 and passing through the rear end of the DC motor 88 and connecting to the upper plate portion 56 is provided upright at a position facing the rear side of the inner rib 102. A semicircular cutout 106 is also formed in the rear vertical rib 105 at a position where the DC motor 88 passes.

By the inner rib 102 and the front and rear longitudinal ribs 104 and 105, an intake chamber 107 in which the DC motor 88 and the dust collection fan 92 are surrounded in front of the dust collection side controller 101 is partitioned and formed in the accommodation chamber 61 a. The DC motor 88 is fitted into the notches 103 and 106 provided in the inner rib 102 and the rear vertical rib 105, and only the rear end having a terminal protrudes rearward of the intake chamber 107, and lead wires 88a and 88a. Is connected to the dust collecting controller 101 as it is.
The lead wire 98 a of the substrate 98 is routed inside the half case 51 a along the inner rib 102 outside the intake chamber 107 and connected to the dust collecting controller 101. The lead wire 75 a of the male terminal 75 passes between the rear plate portion 55 and the bottom plate 62 and is drawn upward to be connected to the dust collecting side controller 101.

  As shown in FIGS. 8 to 10, the slide portion 53 includes an outer pipe 109 that is slidably supported in the front-rear direction on a cylindrical holder 108 that protrudes from the upper left portion of the main body case 51, and an outer pipe 109. The inner pipe 110 is coaxially inserted from the front, the nozzle pipe 111 is connected to the front end of the inner pipe 110 at a right angle, and the flexible hose 112 is connected between the inner pipe 110 and the main body case 51. An L-shaped cylindrical elbow 113 that communicates with the connection port 68 and opens rearward is provided on the left side plate portion 58 of the main body case 51 below the holder 108, and the upper end of the flexible hose 112 is connected to the inner pipe 110. The lower end is connected to the elbow 113 through the joint 114 from the rear.

  In the outer pipe 109, a plurality of protrusions 115, 115,... Are arranged in parallel on the side surface of the main body case 51 in parallel with the axial direction at equal intervals, as shown in FIG. In the main body case 51, as shown in FIG. 8, an upward piece 117 having locking teeth 118 that can be locked to the protrusions 115 at the upper end, and projecting outward below the holder 108 to protrude below the main body case 51. An L-shaped lock member 116 including a lateral piece 119 exposed from the window 120 is provided. The lock member 116 is supported by a coupling portion 121 between the upward piece 117 and the lateral piece 119 so as to be swingable left and right by a coupling shaft 121 in the front-rear direction supported below the holder 108, and with a locking tooth. The locking teeth 118 are urged to a locking position where the locking teeth 118 are locked to the protrusions 115 by a coil spring 122 provided between 118 and a receiving portion 123 provided in the main body case 51 on the right side thereof.

  When the horizontal piece 119 is pushed upward from this locked position, the locking member 116 is rotated to separate the locking teeth 118 from the projections 115, and the outer pipe 109 is attached to the front stopper 124 provided on the outer periphery of the front end and the rear end. After inserting and mounting, the stopper 125 can be slid in the front-rear direction as long as the stopper 125 abuts the front-rear end of the holder 108. If the pushing of the lateral piece 119 is released at an arbitrary slide position, the locking teeth 118 of the upward piece 117 returned to the lock position are locked to the protrusion 115, and the slide of the outer pipe 109 is locked.

  On the front end side of the outer pipe 109, a thick portion 126 is formed which becomes a fitting hole 127 having an inner diameter smaller than the rear side and having an inner diameter of two faces, and the inner pipe 110 is formed in the fitting hole 127. The thick part 126 is slidably penetrated in the front-rear direction in a state in which the outer shape is fitted and the rotation is restricted. A ring-shaped stopper portion 128 is provided on the outer periphery of the rear end of the inner pipe 110, and a coil spring 129 is externally provided between the outer stopper 109 and the rear stopper 125. Therefore, the inner pipe 110 is normally urged to project to a forward position where the stopper portion 128 contacts the thick portion 126 of the outer pipe 109.

The nozzle pipe 111 is provided with a cylindrical suction port 130 that opens in the front-rear direction at an upper end, and is obliquely connected to the inner pipe 110 so that the suction port 130 is located in the center in the left-right direction on the upper front side of the body case 51. Yes. A ring-shaped rubber seal 131 is provided at the front opening of the suction port 130, and a rubber cap 132 having a bit through hole 133 is provided at the rear opening.
The flexible hose 112 is connected to the rear end of the inner pipe 110 in the outer pipe 109 and is pulled out rearward, and then U-turns and extends forward, and the rear opening of the elbow 113 is connected to the rear opening of the elbow 113 via the joint 114 from the rear. Connected. The elbow 113 is fitted into a rising portion 69 of a connection port 68 formed in the side plate portion 58 of the main body case 51, and an O-ring 134 is interposed between the elbow 113 and the lateral ring 70. As shown in FIG. 10, the connection port 68 is located on the upper half side of the dust box 52 and at the center in the front-rear direction.

The dust box 52 has a box body 135 having a square box shape with an upper surface and a rear surface opened. The upper surface of the box body 135 is closed by a cap 136. On the upper surface of the cap 136, a circular convex portion 137 having an outlet 138 formed at the center is formed. On the rear side of the left and right side surfaces of the box body 135, thin wall portions 139 and 139 are formed to which the left and right side plate portions 58 and 58 of the main body case 51 are fitted, and the left thin wall portion 139 corresponds to the connection port 68. An inlet 140 is formed.
Further, the rear surface of the box main body 135 is closed by a lid body 141 having a lower end hinged, and a pair of left and right engagement pieces 142 and 142 that elastically engage the upper surface of the cap 136 at the upper end of the lid body 141. The lid 141 can be opened and closed by engaging and disengaging the locking pieces 142 and 142.

  Further, as shown in FIGS. 11 and 12, the back end of the bifurcated portion is held on the cap 136 in the front surface of the circular convex portion 137 on the upper surface of the cap 136, and the front end floats upward from the cap 136. An operation piece 143 to be a protruding knob portion 144 is provided. On the upper surface of the knob portion 144, a locking projection 145 that protrudes from the inside to the lower end of the escape portion 71 of the main body case 51 in a state of being housed in the housing recess 59 protrudes upward. Reference numeral 146 denotes a concave groove that is recessed in the left-right direction on the rear side of the lower surface of the box main body 135 and fits into the support shaft 72 of the main body case 51 in the storage state in the storage recess 59.

A filter 147 is provided in the box body 135. The filter 147 is made of paper, and is folded in the left-right direction and fixed at its upper end to a rectangular frame 148 as shown in FIGS. 8 and 9. The filter 147 is sandwiched from the left and right sides of the frame 148. Wall bodies 149 and 149 are provided. Both front and rear ends of each wall body 149 are bent inward so as to surround the corner portion of the filter 147.
The filter 147 is configured such that the wall 149 and the frame 148 are locked from above to a receiving step 150 provided when the upper surface of the box body 135 is opened, and a cap 136 is attached, so that the filter 147 and the wall 149 are attached to the box body. 135 is suspended. In this state, the left wall 149 faces away from the inlet 140, and the right and left walls 149 and the front and rear surfaces of the filter 147 are also separated from the inner surface of the box body 135 and the inner surface of the lid 141. Thus, a cylindrical continuous space is formed around the filter 147. Below this filter 147 is a dust collection chamber D.

When the dust box 52 formed in this way is attached to the main body case 51, as shown in FIG. 11, the dust box is inclined from the lower side of the housing recess 59 of the main body case 51 with the lid 141 facing rearward and the hinge side facing up. 52 is inserted, and the concave groove 146 is fitted into the support shaft 72 as shown in FIG.
Next, when the front side of the dust box 52 is lifted upward as it is rotated around the support shaft 72 and pushed into the housing recess 59, the locking projection 145 provided on the knob portion 144 of the operation piece 143 causes the relief portion 145 of the main body case 51 to escape. The mounting is completed by locking to the lower end of 71. In this mounted state, the circular convex portion 137 provided on the upper surface of the cap 136 abuts on the upper ring 66 of the partition plate 61 of the main body case 51 so that the outlet 138 and the dust collecting side intake port 64 communicate with each other. At the same time, the inlet 140 provided on the side surface contacts the lateral ring 70 of the side plate portion 58 of the main body case 51 and communicates with the connection port 68.

Thereby, in the dust collector 50, the air sucked from the suction port 130 of the nozzle pipe 111 passes through the flexible hose 112 from the inner pipe 110 and enters the dust box 52 from the connection port 68 and the inlet 140 via the elbow 113. After passing through the filter 147, a dust collection path is formed that enters the intake chamber 107 through the outlet 138 and the dust collection side intake port 64 and is discharged from the dust collection side exhaust port 93.
When removing the dust box 52, in reverse to the above procedure, when the knob portion 144 of the operation piece 143 is pushed down, the locking projection 145 is released from the lower end of the escape portion 71 of the main body case 51. The groove 146 may be removed from the support shaft 72 and taken out to the front side by rotating the support shaft 72 about the front side so as to push down the front side.

(Mounting the dust collector to the hammer drill)
In the hammer drill 1 and the dust collector 50 configured as described above, when the dust collector 50 having the dust box 52 attached is first attached to the hammer drill 1, as shown in FIG. The main body case 51 is slid upward (or the hammer drill 1 is slid downward) in a state where the main body case 51 is in contact with the rear plate portion 55 in the fitting recess 73 of the main body case 51. Then, as described above, the rail portions 85, 85 provided inside the side plate portions 58, 58 are relatively inserted into the guide grooves 44, 44 provided on the left and right sides of the connecting portion 33. When the left rail portion 85 comes into contact with the interlocking piece 46 and pushes it up, the female connector 34 rotates downward through the support pin 37, and the shutter member 43 is in an open position in which it is retracted from the insertion port 36. Thereafter, the male connector 74 of the main body case 51 enters from the opening of the female connector 34, and the male terminal 75 and the female terminal 35 are electrically connected.

As the male connector 74 enters, as shown in FIG. 2, the rear hook plate 76 also enters the locking recess 47 and locks the hook portion 78 to the engaging claw 48 to connect the coupling convex portion 60 and the connecting portion 33. And combine. At this time, the plate spring 84 of the coupling convex portion 60 elastically presses the lower surface of the connecting portion 33, thereby suppressing rattling in the vertical direction.
On the other hand, the front housing 5 is fitted into the concave surface portion 86 on the upper surface of the main body case 51 and the contact piece 87 is brought into contact with the front surface of the front housing 5 to suppress backlash in the front-rear direction.
In this mounted state, the slide portion 53 is positioned on the left side of the main body housing 2 of the hammer drill 1, the suction port 130 of the nozzle pipe 111 is positioned in front of the operation sleeve 30, and the mounted bit is the center of the suction port 130. And located on the same axis.

Then, after adjusting the slide position of the outer pipe 109 in the holder 108 so that the tip of the bit is positioned at the suction port 130 that is projected and biased together with the inner pipe 110, the suction port 130 is brought into contact with the work surface. When the trigger 9 of the hammer drill 1 is pushed in and the switch 9 is turned on, the brushless motor 3 is driven and the rotating shaft 4 rotates. At this time, if the drill mode or the hammer drill mode is selected by the mode switching lever 32, the bit rotates to allow drilling to the work surface, and the bit penetrates the suction port 130 as drilling progresses. The inner pipe 110 moves backward relative to the outer pipe 109 together with the flexible hose 112 against the bias of the coil spring 129.
However, since the inner pipe 110 and the flexible hose 112 are held in a penetrating state by the holder 108 arranged on the left side of the hammer drill 1, the retracted inner pipe 110 and the flexible hose 112 do not interfere with the hammer drill 1. Can slide without trouble on the left side of the hammer drill 1.

(Lighting and dust collection)
In accordance with the ON operation of the trigger 10, a power supply and drive command is also given to the dust collecting side controller 101 that is electrically connected to the main unit side controller 12 through the female terminal 35 and the male terminal 75. Therefore, the dust collection side controller 101 energizes the substrate 98 to light the LED 97 and also energizes the DC motor 88. When the LED 97 is turned on, the light is irradiated through the lens 100 toward the front of the suction port 130 to illuminate the processing portion. Here, the LED 97 is provided in the center of the main body case 51 in the left-right direction. Therefore, it is possible to appropriately illuminate from a position facing the processing place.

Further, when the dust collecting fan 92 rotates together with the output shaft 89 by driving the DC motor 88, a suction force is generated at the suction port 130 of the dust collector 50, and air is sucked from the suction port 130 together with dust generated during processing. . Then, air passes through the filter 147 through the dust collection path and is discharged from the dust collection side exhaust port 93 through the intake chamber 107, whereby dust is captured by the filter 147 and collected in the box body 135. Store in the dust chamber D.
At this time, since the clearance is formed in the box body 135 on the front, rear, left and right sides of the filter 147 as described above, clogging hardly occurs regardless of the direction in which dust enters the filter 147.
Further, the DC motor 88 is also cooled by the air that has passed through the filter 147 passing through the intake chamber 107. Here, since the lead wire 88a of the DC motor 88 and the lead wire 98a of the substrate 98 are partitioned by the inner rib 102 and the front and rear longitudinal ribs 104 and 105 and wired outside the intake chamber 107, the air flow is the lead wire. There is no contact with 88a, 98a.

  When the push of the trigger 10 is released and the switch 9 is turned OFF, the rotation of the rotating shaft 4 of the brushless motor 3 is stopped and a stop command is issued to the dust collecting controller 101. The power supply to the DC motor 88 and the LED 97 is continued for a predetermined time from the stop command by the delay circuit. Therefore, when the dust collecting fan 92 rotates, dust remaining on the inner pipe 110 and the flexible hose 112 can be collected in the dust box 52, and another operation such as confirmation of the next work position or clean-up can be performed by the afterglow of the LED 97. Can be used for work lighting.

(Removal of dust collector and discharge of dust)
When the dust collector 50 is removed after the work is finished, the release button 80 is pushed in, the hook plate 76 is swung forward, the engagement between the hook portion 78 and the engaging claw 48 is released, and the dust collecting is performed as it is. When the device 50 is slid downward, the male connector 74 is separated from the female connector 34 and removed from the insertion port 36. At the same time, the rail portions 85 and 85 are extracted from the guide grooves 44 and 44 to release the pressing of the interlocking piece 46, so that the female connector 34 returns to the rearward tilting position and the shutter member 43 opens the insertion port 36. Block. Therefore, the dust collector 50 can be removed from the hammer drill 1.

  As described above, the dust is discharged from the dust box 52 by removing the dust box 52 from the front of the main body case 51 and then removing the locking pieces 142 and 142 of the lid 141 from the upper surface of the cap 136 and rotating the lid 141. If the rear surface of the box body 135 is opened, the dust stored in the dust collection chamber D of the box body 135 can be discharged from the rear opening. At this time, the lid 141 can be easily opened and closed by engaging and disengaging the locking pieces 142, 142, so that dust can be easily discarded. The filter 147 can be cleaned or replaced by removing the cap 136 from the box body 135.

(Effect of the invention relating to the irradiation member)
Thus, according to the dust collector 50 and hammer drill 1 of the said form, the slide part 53 is arrange | positioned in the position shifted | deviated to the left side rather than the center of the left-right direction of the main body case 51, and the front surface of the main body case 51 is provided. Since the LED 97 for irradiating the front is provided, the work position and the bit position can be appropriately irradiated before and during work regardless of the slide portion 53.
In particular, here, since the LED 97 is disposed in the center of the front surface of the main body case 51 in the left-right direction, even one LED 97 can be reliably irradiated with facing the working position.

Further, since the power source of the LED 97 is supplied from the hammer drill 1, the battery pack 11 of the hammer drill 1 is used as a power source for the LED 97.
Further, since the LED 97 is turned on / off in conjunction with the ON / OFF operation of the trigger 10 provided on the hammer drill 1, illumination and its stop are automatically executed according to the usage state of the hammer drill 1. Workability is improved.
Since the LED 97 is turned off after a predetermined time has elapsed after the trigger 10 is turned off, the afterglow of the LED 97 can be used for other work immediately after the hammer drill 1 is used.

Note that the position of the LED does not have to be exactly the center in the left-right direction, and may be slightly shifted left and right. The position in the vertical direction is not limited to the above form, and can be changed as appropriate. Further, the angle in the vertical direction and the horizontal direction can be adjusted.
Furthermore, there may be a plurality of LEDs, and as the irradiation member, a light emitter other than the LED, a laser pointer, or the like can be adopted.
The irradiation member afterglow function is also omitted, and the irradiation member can be turned off simultaneously with the trigger OFF operation.

(Effect of invention relating to connection of slide portion)
Thus, according to the dust collector 50 and the hammer drill 1 of the said form, while the connection port 68 is provided in the left side surface side of the dust box 52 in the main body case 51, the base end of the slide part 53 is connected, and a dust box 52 is provided with an inlet 140 communicating with the connection port 68, the slide portion 53 protrudes rearward and does not get in the way, and the shape of the main body housing 2 of the hammer drill 1 is limited. It becomes difficult. Moreover, since dust is sucked in from the side surface of the dust box 52, the filter 147 is not easily clogged.

In particular, here, since the connection port 68 is disposed on the upper half side of the dust box 52 and in the center portion in the front-rear direction, dust is not easily clogged even if the connection port 68 is provided on the side surface side.
Further, since the slide portion 53 is disposed at a position shifted to the left side where the connection port 68 is provided and the flexible hose 112 serving as the base end is connected to the connection port 68, the inner pipe 110 moves backward. Also, the slide stroke can be set longer without interfering with the hammer drill 1.
Furthermore, since the flexible hose 112 is connected to the connection port 68 from the crossing direction with the connection port 68, the amount of protrusion can be suppressed even if the slide part 53 is offset to the left side.

Further, since the connection port 68 is opened rearward by the elbow 113 and the flexible hose 112 is connected to the connection port 68 from the rear, the slide portion 53 that slides back and forth can be connected to the connection port 68 without difficulty.
Furthermore, a predetermined interval is set between the inlet 140 and the filter 147 in the dust box 52, and the wall body 149 is provided on the side surface of the filter 147 facing the inlet 140, so that dust entering from the inlet 140 is directly filtered. The clogging on the side surface of the filter 147 opposed to the inlet 140 can be prevented without contacting the side surface of the 147.

In addition, the left-right position of the slide part may be opposite to the above-described form, and the holder, the connection port, and the dust box inlet may be changed to the right side accordingly. The position of the connection port in the main body case can also be moved in the vertical direction and the front-rear direction.
Also, the direction of connection of the flexible hose is not limited to the rear, and the elbow may be opened obliquely downward or downward in the rear to connect the flexible hose from diagonally downward or downward.

(Effect of invention relating to lead wire protection)
As described above, according to the dust collector 50 and the hammer drill 1 of the above-described form, the air flow path passing through the housing chamber 61a of the DC motor 88 and the wiring (lead wire) in the main body case 51 in the main body case 51. 75a, 88a, 98a), and partition portions (inner rib 102, front longitudinal rib 104, rear longitudinal rib 105) that prevent contact between the air flow and the wiring are provided, so that DC motor 88 is provided. It is possible to reduce the risk of damage to the wiring due to the air flow that cools the air.
In particular, since the DC motor 88 is housed in the main body case 51 with the output shaft 89 in the front-rear direction, the air flow channel and the wiring can be easily partitioned in the housing chamber 61a. it can.

Further, since the dust box 52 is disposed below the main body case 51 and the DC motor 88 is accommodated above the dust box 52, the main body case 51 has a compact shape with reduced front and rear and vertical dimensions.
Further, the main body case 51 is formed by assembling a pair of left and right half cases 51a and 51b, and a partition portion is erected on the inner surface of each of the half cases 51a and 51b. Therefore, the partition portion is formed with the assembly of the half cases 51a and 51b.
And since the dust collection side controller 101 is arrange | positioned in the rear part of the storage chamber 61a of the DC motor 88 in the main body case 51, the lead wire 88a between the DC motor 88 can be wired with the shortest distance.

In addition, you may provide an inner side rib and the front-back longitudinal rib on the left-right reverse with respect to a half case. Moreover, it is also possible to partition the intake chamber by providing inner ribs in both the left and right half cases instead of the one longitudinal longitudinal rib.
Furthermore, the DC motor is not limited to the upper side of the dust box, and may be accommodated behind the dust box as long as the air flow and the wiring can be separated, or may be accommodated in the vertical direction instead of the front-rear direction.

(Effect of invention relating to dust collection system)
Thus, according to the dust collection system S of the said form, the interlocking piece 46 which protrudes in the guide groove 44 in the closed position of the insertion port 36 is integrally provided in the shutter member 43 side by the side of the hammer drill 1, When the rail portion 85 of the main body case 51 is fitted into the guide groove 44 of the main body housing 2, the rail portion 85 engages with the interlocking piece 46 of the shutter member 43 and the shutter member 43 is opened to the insertion port 36. As a result, the connecting rail portion 85 of the dust collector 50 is also used for moving the shutter member 43. Therefore, the connection and electrical connection between the hammer drill 1 and the dust collector 50 can be realized with a simple structure with a small number of parts.

Particularly, since the guide groove 44 and the rail portion 85 are formed in the vertical direction here, the dust collector 50 can be easily attached to and detached from the hammer drill 1.
Further, since the shutter member 43 is rotatably provided between the open position and the closed position of the insertion port 36 and is urged to rotate to the closed position by the torsion spring 42, the shutter member 43 is disposed in a space-saving manner. can do.
Further, the main body case 51 is attached to the upper main body housing 2 from the lower side, and the engaging claw 48 and the hook are engaged between the lower surface of the main body housing 2 and the upper surface of the main body case 51 in the attached state. By providing each of the plates 76, the upper and lower mating surfaces of the main body housing 2 and the main body case 51 can be securely coupled to each other.

The hook plate 76 can be operated to the release position from the engagement claw 48 by one release button 80 provided on the main body case 51, so that the dust collector 50 can be easily removed.
In addition, since the front end surface 5a and the contact piece 87 are provided on the outer surface of the front housing 5 and the upper surface of the main body case 51 to restrict the movement in the front-rear direction by being in contact with each other when the main body case 51 is mounted. The dust collector 50 can be mounted without rattling.

In the above embodiment, the interlocking piece is provided on a separate support pin from the female connector on which the shutter member is provided. However, the interlocking piece may be provided integrally on the shutter member. Further, the female connector and the shutter member are not limited to be provided integrally, but the female connector can be fixed at the downward position so that only the separate shutter member can be moved with respect to the insertion port. The shutter member may be a linear movement instead of a rotational movement.
Further, the guide groove and the rail portion may be formed in the front-rear direction instead of the vertical direction, and the dust collector may be mounted from the front of the hammer drill. In this case, the mating surfaces provided with the engaging portions are the front surface of the main body housing and the rear surface of the main body case.

  On the other hand, as shown in FIGS. 14 and 15, in the state where the shield plate 34 a protruding backward at the downward position is integrally coupled to the rear upper end of the female connector 34 and the dust collector 50 is mounted, the shield plate 34 a is You may make it protrude backward between the upper machine side inlet 16 and the stopper 41 on the upper side. If such a shielding plate 34a is provided, the upper part of the coupling portion between the female connector 34 and the male connector 74 is covered by the shielding plate 34a, and foreign matters such as water entering from the machine-side intake port 16 enter the coupling portion. Intrusion can be prevented.

  In addition, in common with each invention, the form of the hammer drill may be a horizontal motor or an AC machine that uses a commercial power supply instead of a DC machine. Of course, the present invention is not limited to hammer drills and can be applied to other power tools such as power drills as long as a dust collector can be attached.

  1 .... hammer drill, 2 .... main body housing (housing), 3 .... brushless motor, 4 .... rotary shaft, 5 .... front housing (housing), 5a..front end surface (contact portion), 6 .. Tool holder, 8 ... Handle (housing), 9 ... Switch, 10 ... Trigger, 11 ... Battery pack, 12 ... This machine side controller, 33 ... Connection, 34 ... Female connector, 35 ... Female terminal (terminal on this machine), 36 .. Insertion port, 42. Torsion spring (biasing means), 44. Guide groove, 46 ... Interlocking piece (interlocking part), 48 ... Engaging claw ( This machine side engaging part), 50 ... Dust collector for electric tools, 51 ... Main body case, 52 ... Dust box (dust collecting part), 53 ... Sliding part, 59 ... Containing recess, 60 ... Connection Convex part, 61 ... Partition plate, 64 ... Dust collection side suction Port (inlet), 68 ... Connection port, 73 ... Mating recess, 74 ... Male connector, 75 ... Male terminal (dust collection side terminal), 75a ... Lead wire (wiring), 76 ... Hook Plate (dust collecting side engaging part), 78 ... Hook part, 80 ... Release button, 85 ... Rail part, 87 ... Contact piece (contact part), 88 ... DC motor (motor), 88a · · Lead wires (wiring), 89 · · Output shaft, 92 · · Dust collection fan, 93 · · Dust collection side exhaust port (exhaust port), 97 · · LED (irradiation member), 98 · · Substrate, 98a ·・ Lead wire (wiring) 101 ・ ・ Dust collecting side controller (controller) 102 ・ ・ Inner rib (partition) 104 ・ ・ Front longitudinal rib (partition) 105 ・ ・ Rear longitudinal rib (partition) 107 .. Intake chamber, 108 .. Holder, 109 .. Outer pipe, 110 .. Inner pipe, 111 · Nozzle pipe (nozzle), 112 · · Flexible hose (hose), 116 · · Locking member, 130 · · Suction port, 135 · · Box body, 138 · · Outlet, 140 · · Inlet, 141 · · Lid 147 ... Filter, 149 ... Wall, S ... Dust collection system, D ... Dust collection chamber.

Claims (6)

A main body case that has an exhaust port and can be attached to an electric tool, has a motor and a dust collecting fan installed therein, a dust box in which a filter is installed, and a connection port provided in the main body case. And a cylindrical slide portion that is slidable in the front-rear direction with a suction port provided therein, and after passing through the filter from the suction port by rotation of the dust collecting fan, the inside of the main body case A dust collector for an electric tool in which a dust collection path that passes through a motor storage chamber and reaches the exhaust port is formed,
A partition portion is provided in the main body case for partitioning between a flow path of the air flow passing through the motor chamber and the wiring in the main body case to prevent contact between the air flow and the wiring. A dust collector for an electric power tool.   2. The dust collecting apparatus for an electric tool according to claim 1, wherein the motor is housed in the main body case in an attitude in which an output shaft is in a front-rear direction.   The dust collector for an electric tool according to claim 1, wherein the dust box is disposed below the main body case, and the motor is accommodated above the dust box.   The main body case is formed by assembling a pair of left and right halved cases, and the partition portion is formed by abutment of ribs erected on the inner surface of each of the halved cases. The dust collector for electric tools in any one of 1 thru | or 3.   5. The power tool dust collector according to claim 1, wherein a controller for controlling the motor is disposed in a rear portion of the motor housing chamber in the main body case. 6.   A power tool comprising the power tool dust collector according to any one of claims 1 to 5.

Images