JP2018114567A - Dust collector for electric tool and electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a slide part with a configuration that prevents an increase in the size of a housing and is compact.SOLUTION: A dust collector 20 for electric tool includes a body case 21 attachable to an electric tool, a cylindrical slide part 23 which is provided on the body case 21 and has a nozzle 24 having a suction port 43 on the front end, and a dust box 22 storing power dust sucked from the nozzle 24, where the slide part 43 has a telescope structure formed of a plurality of cylindrical bodies (front cylinder 35, middle cylinder 36 and rear cylinder 37), diameters of which are gradually increased toward the front side.SELECTED DRAWING: Figure 1

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 may be 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. Here, at the front end of the housing to be mounted on the housing of the electric power tool, a support part that protrudes forward and can slide in the front-rear direction and is provided with a dust collecting adapter (suction port) at the front end is sucked from the suction port. The air is passed through a filter in the housing from the dust collecting adapter through the dust collecting hose, thereby capturing dust in the air. Moreover, the support part has a telescope structure composed of a plurality of cylindrical members.

JP 2008-207258 A

  In the conventional dust collecting apparatus for electric tools, when the dust collecting adapter is retracted, the cylindrical member in the front stage is inserted into the cylindrical member in the subsequent stage in order and is stored in the housing. Therefore, the housing becomes large in size to accommodate the rearmost tubular member. In particular, when the slide stroke increases and the number of cylindrical members increases, the problem of enlargement becomes significant.

  Accordingly, an object of the present invention is to provide a dust collector for an electric tool and an electric tool that can form a slide portion with a compact structure that does not increase the size of the housing.

In order to achieve the above object, the invention described in claim 1 includes a main body case that can be attached to an electric tool, a cylindrical slide portion that is provided in the main body case and has a nozzle having a suction port at a front end; A dust collection device for storing a dust sucked from a nozzle, and a dust collection device for an electric tool comprising:
The slide portion has a telescope structure including a plurality of cylindrical bodies having a diameter that gradually increases toward the front side.
According to a second aspect of the present invention, in the configuration of the first aspect, a slide bar that is supported by the main body case so as to be slidable in the front-rear direction is connected in parallel with the cylindrical body. It is characterized by.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the slide portion includes three cylindrical bodies and slides in two stages.
According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the slide portion is shifted to either the right or left from directly below the tip tool of the electric tool in a state where the main body case is mounted on the electric tool. It is arrange | positioned at a main body case so that it may become.
In order to achieve the above object, the invention described in claim 5 is an electric tool, and is provided with the electric power tool dust collector according to any one of claims 1 to 4. .

According to the first and fifth aspects of the invention, the slide portion has a telescope structure having a large diameter on the front side, so that the cylinder at the rearmost position has a minimum diameter and is compact without increasing the size of the main body case. A slide part can be formed with a structure.
According to the second aspect of the invention, in addition to the above-described effect, the slide bar that is supported in parallel with the main body case so as to be slidable in the front-rear direction is connected to the foremost cylinder so that the front side is large. Even with a telescopic structure having a diameter, the foremost cylindrical body can be smoothly slid using a single slide bar. In addition, since the slide bar does not interfere with the main body case or the power tool, the required slide stroke can be secured even in a small model.
According to the third aspect of the invention, in addition to the above-described effect, the slide portion includes three cylindrical bodies and slides in two stages, so that the maximum stroke can be increased and a so-called long bit having a long overall length. Can also be supported.
According to the fourth aspect of the invention, in addition to the above-described effect, the slide portion is offset from right under the tip tool to either the left or right side, so that the slide portion can be moved without interference with the main body case without using a slide bar. Can be expanded and contracted.

It is a perspective view from the side of a dust collection system. It is a side view of a dust collection system. It is a front view of a dust collection system. It is a top view of a dust collection system. It is a bottom view of a dust collection system. FIG. 3 is a partial cross-sectional view taken along line AA in FIG. 2. FIG. 3 is a partial sectional view taken along line B-B in FIG. 2. It is a perspective view of a guide metal fitting. It is CC sectional view taken on the line of FIG. It is a side view of a dust collection system in the state where a slide part extended (only a slide part is shown with a longitudinal section). It is a side view of a dust collection system in the state where a slide part contracted. It is a side view of a dust collection system in the state where a slide part contracted (only a slide part is shown with a longitudinal section). It is the DD sectional view taken on the line of FIG. It is a side view which shows the example of a change of a dust collection system. It is a perspective view which shows the example of a change of a dust collection system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 to 3 show 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 an electric tool. 2 is a side view, FIG. 3 is a front view, FIG. 4 is a plan view, and FIG. 5 is a bottom view.

  First, the hammer drill 1 is formed with a motor housing 3 for housing a motor at the front lower portion of the main body housing 2, a handle 4 is connected to the rear upper portion, and a battery pack 6 serving as a power source is connected to the lower portion of the handle 4. A battery mounting portion 5 is formed in which two 6 can be mounted side by side. A front housing 7 is assembled to the front portion of the main body housing 2, and a tip tool (in FIG. 1 and the like, a maximum drilling depth of 120 mm or more can be accommodated by an operation sleeve 8 at the tip of a tool holder (not shown) provided inside. A drill bit (hereinafter referred to as “long bit LB”) can be mounted. Reference numeral 9 denotes a switch lever provided on a switch built in the handle 4, and reference numeral 10 denotes a side handle.

A change lever 11 for switching the operation mode is provided on the side surface of the front housing 7, and the change lever 11 operates the hammer mode for operating the impact mechanism to apply impact to the tip tool, and the rotation mechanism. A drill mode in which the tip tool is rotated together with the tool holder and a hammer drill mode in which the striking mechanism and the rotation mechanism are simultaneously operated to strike and rotate the tip tool can be selected.
Here, the motor housing 3 serves as a mounting portion for the dust collector, and a female connector (not shown) having a power supply female terminal on the front side of the motor housing 3 is coupled to the dust collector on both lower sides. A coupling groove (not shown) is provided.

Next, the dust collector 20 includes an L-shaped main body case 21 attached to the motor housing 3 of the hammer drill 1, a dust box 22 detachably attached from the front side of the main body case 21, and the main body case 21. And a slide part 23 provided with a nozzle 24 at the tip.
First, the body case 21 is formed by assembling left and right half cases, and a fitting recess 25 that fits the motor housing 3 of the hammer drill 1 is formed on the upper rear surface. A motor 26 with the output shaft directed forward is housed behind the main body case 21, and a controller 27 is provided behind the motor 26. Further, a dust collection fan 28 is fixed to the output shaft of the motor 26, and exhaust ports 29, 29,... Are formed on the lower surface of the intake chamber that houses the dust collection fan 28. The front of the intake chamber is a connecting portion of the dust box 22, and the dust box 22 containing the filter 30 is detachable from the front.

Further, in the fitting recess 25 of the main body case 21, three plate-shaped male terminals 31, 31,... For power supply and communication projecting rearward are arranged in parallel in the left-right direction at a predetermined interval. . These male terminals 31 are electrically connected to the controller 27 by lead wires (not shown).
A pair of guide ribs 32 and 32 are erected in the front-rear direction on the left and right sides of the rear upper surface of the main body case 21. A not-shown ridge provided on the inner side of the upper end of each guide rib 32 can be fitted into a coupling groove provided on the side surface of the motor housing 3.

Above the coupling portion of the dust box 22, a guide passage 33 is formed with a receiving portion 34 protruding from the upper surface of the main body case 21 at the upper end, and a lower end connected to the inlet on the upper rear surface of the dust box 22 in the main body case 21. ing.
Therefore, the main body case 21 is configured such that the motor housing 3 is slid in the front-rear direction by fitting the ridges in the coupling grooves between the guide ribs 32 and 32 in the fitting recess 25 on the upper rear surface, and sliding relatively. 3 is made. At the same time, the male terminal 31 is electrically connected to the female connector, and power is supplied from the hammer drill 1 to the motor 26 and the controller 27.

  On the other hand, the slide portion 23 is a hollow cylindrical body made of resin, and has a telescope structure including three cylinders including a front cylinder 35, an intermediate cylinder 36, and a rear cylinder 37. However, here, the rear cylinder 37 has the smallest diameter, the middle cylinder 36 has a larger diameter than the rear cylinder 37 and is fitted on the rear cylinder 37 from the front, and the front cylinder 35 has a larger diameter than the middle cylinder 36. The tube 36 is externally fitted from the front. That is, the telescope structure is a reverse telescope structure in which the diameter of the cylinder gradually increases toward the front, and the rear end of the rear cylinder 37 is connected to the receiving portion 34 and communicates with the dust box 22 via the guide passage 33. doing.

  As shown in FIG. 6, outer stopper portions 38 and 39 are respectively provided on the outer periphery of the front portion of the middle tube 36 and the rear tube 37, and an inner stopper portion 40 is formed on the inner periphery of the rear end of the middle tube 36. ing. Therefore, when the rear cylinder 37 is inserted from the front side of the middle cylinder 36, the outer stopper portion 39 is locked to the inner stopper portion 40, and the middle cylinder 36 and the rear cylinder 37 are prevented from coming off from each other. By inserting the middle cylinder 36 from the front side of the front cylinder 35 and attaching a stopper ring 41 to the rear end of the front cylinder 35, the outer stopper portion 38 is locked to the stopper ring 41 and the front cylinder 35 and the middle cylinder 36 are mutually prevented.

The base end of the nozzle 24 is connected to the front end of the front cylinder 35 and protrudes upward from the front cylinder 35. A flexible hose 42 is connected between the base end of the nozzle 24 and the receiving portion 34 in the slide portion 23.
Further, a ring-shaped suction port 43 through which a drill bit passes is formed at the upper end of the nozzle 24, and a rubber having a plurality of cuts radially formed from the central through hole in the rear opening of the suction port 43. A cap 44 is fitted, and a rubber closure ring 45 that occupies the work surface in a contact state with the work surface is detachably fitted to the front opening.

Slide (extension / contraction) before and after the slide part 23 is performed on a support arm 46 protruding from the upper part of the main body case 21 to the left side, and a slide bar 47 provided integrally with the front cylinder 35 and a guide provided on the support arm 46. This is performed using the metal fitting 48.
First, the slide bar 47 is made of a metal such as aluminum, and is connected in parallel to the front cylinder 35 at a predetermined interval via a connection plate 49 connected in parallel to the left side surface of the front cylinder 35. On the left side of the slide bar 47, two upper and lower rails 50, 50 are provided in parallel over the entire length, and can be slid along the rails 50, 50 by engaging the rails 50, 50 from above and below. A front stopper 51 and a rear stopper 52 are provided on the front and rear sides of a stopper 53 projecting in an arc from the support arm 46 to the left outside of the slide bar 47. A rack 54 composed of a plurality of teeth is provided between the rails 50, 50, and a lock button 55 is provided on each of the front and rear stoppers 51, 52 that protrudes and is urged upward while being engaged with the rack 54. It has been.

Therefore, when the lock button 55 is pushed in and the meshing with the rack 54 is released, the front and rear stoppers 51 and 52 can slide along the rails 50 and 50, and when the lock button 55 is released, the lock button 55 is moved upward. Returning to the projecting position, the gear engages with the rack 54, and the sliding of the front and rear stoppers 51 and 52 is restricted.
Further, as shown in FIG. 7, the lower right portion of the slide bar 47 includes a horizontal plate portion 57 that protrudes toward the slide portion 23 side, and a vertical plate portion 58 that is connected to the horizontal plate portion 57 in an orthogonal manner. An inverted T-shaped guide rail 56 is integrally formed.

  Next, the guide metal fitting 48 is a metal plate-like body, and as shown in FIGS. 8 and 9, a mounting plate 59 formed vertically in the support arm 46 between the slide portion 23 and the slide bar 47. The left side surface is screwed vertically through attachment pieces 60, 60 provided downward in the front-rear position. The upper edge of the guide bracket 48 and the lower edge excluding the mounting pieces 60, 60 are folded up and down from the upper and lower raised portions 61, 61 projecting to the left side and from the leading ends of the raised portions 61, 61. The bent cover portions 62 and 62 are formed, and the vertical plate portion 58 of the guide rail 56 is fitted therein, so that the upper, lower, left, and right surfaces of the vertical plate portion 58 are supported by the guide metal fitting 48. It has become.

As shown in FIG. 7, the guide fitting 48 and the guide rail 56 here are on the left half side of the vertical section line L passing through the center O of the slide portion 23 and are higher than the vertical height H of the slide portion 23. It is arranged within a small height (in a region where the portion including the upper and lower rising portions 61 and 61 and the guide rail 56 do not protrude from the slide portion 23 when viewed from the right side of the slide portion 23).
Therefore, the slide part 23 can be guided through the slide bar 47 only by the guide fitting 48, and the guide structure becomes compact. In addition, since the guide rail 56 positioned between the slide portion 23 and the slide bar 47 is guided, there is less risk of damage and the narrow portion is less likely to be twisted, and the slide portion 23 can be accurately Can guide well. Furthermore, since the guide fitting 48 and the guide rail 56 are not exposed from the slide portion 23 in a side view from the right, it is difficult to receive damage from the outside (particularly from the side).

  On the other hand, in the support arm 46, below the slide bar 47, a spiral spring 63 is rotatably supported by a support pin 64 in the left-right direction, as shown in FIG. An end portion 65 on the outer peripheral side of the spiral spring 63 is pulled out rearward along the lower surface of the slide bar 47 and is screwed to the rear end of the slide bar 47 to restrict the retracted position of the rear stopper 52. It is connected to. Accordingly, the slide bar 47 in the normal state is urged together with the front cylinder 35 to the forward movement position of FIGS. 1 and 2 where the rear stopper 52 abuts against the stopper 53 by the tensile force of the spiral spring 63. In this state, as shown in FIG. 10, the front cylinder 35, the middle cylinder 36, and the rear cylinder 37 are positioned at the foremost positions, and the slide portion 23 is extended.

  In the dust collection system S configured as described above, the rail of the slide portion 23 is arranged such that the tip of the bit (long bit or short bit) is positioned at the suction port 43 of the nozzle 24 that is projected and urged together with the slide portion 23. The initial position of the rear stopper 52 on 50, 50 is adjusted, and the position of the front stopper 51 is adjusted according to the drilling depth. Thereafter, when the suction port 43 is brought into contact with the surface to be drilled and the switch lever 9 of the hammer drill 1 is pushed in to turn on the switch, the motor is driven to rotate the output shaft. At this time, if the drill mode or the hammer drill mode is selected by the change lever 11, the bit rotates to enable drilling on the drilled surface.

When the bit (here, the long bit LB) passes through the suction port 43 as drilling proceeds, the slide portion 23 first retracts against the bias of the spiral spring 63. When the base end of the nozzle 24 comes into contact with the outer stopper portion 38 of the middle cylinder 36, the middle cylinder 36 also moves backward together with the front cylinder 35.
Here, the front cylinder 35 slides in a state in which the guide rail 56 provided on the integral slide bar 47 is guided by the guide fitting 48 on the support arm 46. The guide rail 56 that is a part of the slide bar 47 is directly supported, but the vertical plate portion 58 of the guide rail 56 is supported by the guide metal fittings 48 on the four sides of the top, bottom, left, and right as described above. The guide rail 56 can slide smoothly without rattling.

  When the set depth is reached and the front cylinder 35 is retracted, as shown in FIGS. 11 to 13, the rear cylinder 37, the middle cylinder 36, and the front cylinder 35 are overlapped on the outside in this order, and the slide portion 23 contracts in two stages. Will do. At this time, the flexible hose 42 also contracts between the base end of the nozzle 24 and the receiving portion 34. Therefore, the slide bar 47 integrated with the front cylinder 35 moves backward beyond the receiving portion 34, but is in a position protruding to the left side from the main body case 21, so that the main body case 21 and the hammer drill 1 behind it. There will be no interference.

  On the other hand, when the motor 26 in the main body case 21 is driven by the power supply from the hammer drill 1 and the dust collecting fan 28 rotates, a suction force is generated at the suction port 43, and air is sucked together with dust generated at the time of drilling. It is sucked from the mouth 43, passes through the flexible hose 42 through the nozzle 24, and reaches the dust box 22 from the receiving portion 34 through the guide passage 33. Then, the air passes through the filter 30 in the dust box 22, reaches the intake chamber, and is discharged from the exhaust port 29 of the main body case 21. Thereby, dust in the air is captured by the filter 30 and stored in the dust box 22.

Thus, according to the dust collector 20 and the hammer drill 1 of the said form, the slide part 23 is made into several cylinders (a front cylinder 35, the middle cylinder 36, a rear cylinder which become a diameter gradually as it goes to the front side. 37), the slide part 23 can be formed with a compact structure that does not increase the size of the main body case 21.
In particular, here, a slide bar 47 supported so as to be slidable in the front-rear direction on the main body case 21 is connected to the front cylinder 35 in the foremost position in parallel with the front cylinder 35, so that the telescope having a large diameter on the front side Even in the structure, the front cylinder 35 can be smoothly slid using one slide bar 47. Further, since the slide bar 47 does not interfere with the main body case 21 and the hammer drill 1, a necessary slide stroke can be secured even in a small model.
Furthermore, since the slide part 23 is provided with three cylindrical bodies and slides in two stages, the maximum stroke can be increased and the long bit LB can be supported.

Note that the slide bar is not limited to the left side of the foremost cylinder, and may be on the right side or the lower side as long as it does not interfere with the main body case or the power tool.
Moreover, in the said form, although the slide part is made into the telescope structure by three cylinders, the number of cylinders is not restricted to this, The telescope structure by four or more cylinders or two cylinders is also employable.
14 and 15 show a dust collector 20A having a slide portion 23A that employs a telescopic structure of two cylinders, a front cylinder 35 and a rear cylinder 37. FIG. The slide portion 23A is supported on a support arm 46 projecting obliquely forward from the upper left side of the main body case 21 at a position offset from the lower side of the long bit LB to the left side via a lateral guide fitting 48A. Has been. The nozzle 24 extends obliquely upward to the right from the front end of the front cylinder 35, and the suction port 43 is positioned in front of the long bit LB. The hammer drill 1 is an AC machine using a commercial power supply instead of a battery pack.

Here, an inverted T-shaped guide rail 56A composed of a vertical plate portion 68 and a horizontal plate portion 69 is directly formed at the lower portion of the front cylinder 35, and the horizontal plate portion 69 is connected to the rising portions 61, 61 and the covering portions 62 and 62 are guided. Further, rails 50 and 50, a rack 54, and front and rear stoppers 51 and 52 are provided on the left side surface of the front cylinder 35. The rear cylinder 37 is connected to a receiving portion 34 at the upper end of a guide passage 33 provided on the left side surface of the main body case 21 and connected to the dust box 22.
In this case, when the front cylinder 35 is retracted, it interferes with the receiving portion 34, but the right side surface of the front cylinder 35 is formed with a long hole 67 cut out from the rear end toward the front. When the front cylinder 35 is retracted, the receiving portion 34 enters the front cylinder 35 through the long hole 67 and allows the front cylinder 35 to retract.

Further, since the slide portion 23A is arranged in the main body case 21 so that the main body case 21 is attached to the hammer drill 1 so as to be shifted to the left side from directly below the tip tool, the slide bar is not used. The slide portion 23A can be expanded and contracted without interference with the main body case 21.
In this embodiment as well, a telescope structure with three or more cylinders having a large diameter on the front side may be used. Further, the offset of the slide portion may be on the right side of the bit.

And in common with each form, the length of each cylinder may differ, respectively, and you may use not only a cylinder but the cylinder of square tubes (a square tube, a hexagonal cylinder, etc.). An anti-rotation structure may be provided between adjacent cylinders (for example, a protrusion or a key is provided on the outer surface of the small-diameter cylinder, and a concave groove is provided on the inner surface of the large-diameter cylinder). However, the flexible hose may be omitted, and the inside of the cylinder may be used as a direct dust collection path.
Further, the dust collection unit is not limited to a detachable dust box, and a dust collection chamber may be provided in the main body case so that the dust collection unit can be opened and closed with a lid or the like.
In addition, the form of the hammer drill is not limited to the above form, and the present invention can be applied to other electric tools such as an electric drill as long as the dust collector can be attached.

  1 .... Hammer drill, 2 .... Body housing, 3 .... Motor housing, 7. Front housing, 20, 20A ... Power tool dust collector, 21 ... Main body case, 22 ... Dust box (dust collector) ), 23, 23A..Slide part, 24..Nozzle, 26..Motor, 27..Controller, 28..Dust collector fan, 29..Exhaust port, 30..Filter, 33..Guide passage, 34. ..Receiving part, 35 ..Front cylinder, 36 ..Medium cylinder, 37 ..Rear cylinder, 42 ..Flexible hose, 43 ..Suction port, 46 ..Support arm, 47 ..Slide bar, 48, 48A ..Guide metal fittings 49..Connecting plate 56, 56A..Guide rail 57..Horizontal plate portion 58..Vertical plate portion S..Dust collection system LB.Long bit.

Claims (5)

A main body case that can be attached to the electric tool, a cylindrical slide portion that is provided in the main body case and has a nozzle having a suction port at a front end thereof, and a dust collection portion that stores dust sucked from the nozzle. A dust collector for an electric tool comprising:
The dust collecting apparatus for an electric tool, wherein the slide portion has a telescope structure including a plurality of cylindrical bodies having a diameter that gradually increases toward the front side.   2. The electric tool according to claim 1, wherein a slide bar that is supported by the main body case so as to be slidable in the front-rear direction is coupled to the cylindrical body at the foremost position in parallel with the cylindrical body. Dust collector.   3. The dust collecting apparatus for an electric power tool according to claim 1, wherein the slide portion includes three of the cylindrical bodies and slides in two stages.   The slide portion is arranged in the main body case so as to be shifted to either the right or left from directly below the tip tool of the electric tool in a state where the main body case is mounted on the electric tool. The dust collector for electric tools in any one of Claims 1 thru | or 3.   An electric tool comprising the electric tool dust collector according to any one of claims 1 to 4.

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