Dust collection attachment for power tools and power tools

Abstract

To enable attachment to a power tool in a simple manner.SOLUTION: A dust collection attachment 1 for a power tool includes: an attachment part 3 to be attached to a grinder 50 to which an auxiliary handle 62 can be attached; and a dust collection part 2 connected to the attachment part 3. The attachment part 3 is made attachable by utilizing a screw hole 61 provided in the grinder 50 in order to attach the auxiliary handle 62.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a dust collection attachment for a power tool that is attached to a power tool such as a grinder, and to a power tool to which the dust collection attachment is attached. [Background technology]

[0002] When performing metalworking using a grinding tool such as a grinder, measures are taken to prevent chips and cuttings generated during work from scattering. For example, Patent Document 1 discloses an invention in which a hood connected to a dust collection hose is attached to a grinding wheel guard that covers the grinding wheel of the grinder, and a permanent magnet or electromagnet is provided on the surface of the hood to collect magnetic chips and other dust. Also, Patent Document 2 discloses an invention in which a protective hood (grinding wheel guard) that covers a cutting tool such as a grinding wheel is provided with a shielding member that prevents chips and other dust generated during work from scattering. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-210078 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-196010 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned conventional hoods and shielding members are both attached to the grindstone guard, which requires additional processing to attach the hood etc. to the grindstone guard, leading to increased costs.

[0005] SUMMARY OF THE INVENTION Accordingly, an object of the present disclosure is to provide a dust collection attachment for a power tool that can be easily attached to the power tool, and the power tool. [Means for solving the problem]

[0006] In order to achieve the above object, the present disclosure provides a dust collection attachment for a power tool, the dust collection attachment having a mounting portion for mounting an auxiliary handle to a power tool to which the auxiliary handle can be attached, and a dust collection portion connected to the mounting portion, the power tool has a tool bit and a handle attachment portion for attaching the auxiliary handle, The mounting portion is When the auxiliary handle is attached to the handle attachment portion, the auxiliary handle is attached to the power tool by being sandwiched between the auxiliary handle and the power tool. The position of the dust collecting unit relative to the tool bit can be changed on a circle concentric with the center of the tool bit. It is characterized by: Another configuration of the present disclosure for achieving the above object is a dust collection attachment for a power tool, the dust collection attachment having a mounting portion for mounting an auxiliary handle to a power tool to which the auxiliary handle can be attached, and a dust collection portion connected to the mounting portion, The power tool includes a tool bit, a cover that partially covers the outside of the tool bit, and a handle attachment portion for attaching the auxiliary handle. the attachment portion is attached to the power tool by being sandwiched between the auxiliary handle and the power tool when the auxiliary handle is attached to the handle attachment portion, and is positioned in the axial direction of the tool bit by engaging with the cover; The dust collecting unit is characterized in that its position relative to the tool bit is changeable. Another configuration of the present disclosure for achieving the above object is a dust collection attachment for a power tool, the dust collection attachment having a mounting portion for mounting an auxiliary handle to a power tool to which the auxiliary handle can be attached, and a dust collection portion connected to the mounting portion, the power tool has a handle attachment portion for attaching the auxiliary handle; The attachment portion is attached directly to the handle attachment portion to which the auxiliary handle is not attached, The attachment portion and the dust collecting portion are connected via an arm, and the arm is connected to the attachment portion by a ball joint so as to be rotatable in all directions. [Effects of the Invention]

[0007] According to the present disclosure, the handle attachment portion can also be used to attach the power tool dust collection attachment, which allows the power tool dust collection attachment to be attached to the power tool with a simple structure, and also allows the external space of the power tool to be effectively utilized for the power tool dust collection attachment. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of a dust collecting attachment for a power tool according to a first embodiment. [Figure 2] 1 is a front view of a dust collecting attachment for a power tool according to a first embodiment. [Figure 3] 1 is a side view of a dust collecting attachment for a power tool according to a first embodiment. [Figure 4] 1 is a perspective view of a grinder to which a dust collecting attachment for a power tool according to a first embodiment is attached, viewed from below; [Figure 5] 1 is a front view of a grinder to which a dust collecting attachment for a power tool according to a first embodiment is attached. [Figure 6]1 is a side view of a grinder to which a dust collecting attachment for a power tool according to a first embodiment is attached. [Figure 7] 1 is a bottom view of a grinder to which a dust collecting attachment for a power tool according to a first embodiment is attached. FIG. [Figure 8] FIG. 7 is an enlarged cross-sectional view taken along the line AA in FIG. 6. [Figure 9] FIG. 8 is an enlarged cross-sectional view taken along the line BB in FIG. 7. [Figure 10] FIG. 10 is a perspective view of a dust collecting attachment for a power tool according to a second embodiment, seen from above. [Figure 11] FIG. 10 is a front perspective view of a dust collecting attachment for a power tool according to a second embodiment. [Figure 12] FIG. 10 is a perspective view of a grinder to which a dust collecting attachment for a power tool according to a second embodiment is attached, as viewed from above. [Figure 13] FIG. 10 is a front view of a grinder to which a dust collecting attachment for a power tool according to a second embodiment is attached. [Figure 14] FIG. 10 is a plan view of a grinder to which a dust collecting attachment for a power tool according to a second embodiment is attached. [Figure 15] FIG. 10 is a side view of a grinder to which a dust collecting attachment for a power tool according to a second embodiment is attached. DETAILED DESCRIPTION OF THE INVENTION

[0009] In one embodiment of the present disclosure, the attachment portion may be attachable to the handle attachment portion by attaching an auxiliary handle. With this configuration, the dust collection attachment for a power tool can be attached simultaneously with the attachment operation of the auxiliary handle, thereby simplifying the attachment work. In one embodiment of the present disclosure, the attachment portion may be attached by being sandwiched between the auxiliary handle attached to the handle attachment portion and the power tool, whereby the dust collection attachment for the power tool can be clamped and fixed simultaneously with the attachment operation of the auxiliary handle. In one embodiment of the present disclosure, the auxiliary handle may have a threaded portion at a tip thereof, and the handle attachment portion may be a threaded hole into which the threaded portion is threaded. With this configuration, the dust collection attachment for a power tool can be securely fixed. In one embodiment of the present disclosure, the power tool may be provided with a plurality of handle attachment portions, and the attachment portion may be attachable to any of the handle attachment portions. With this configuration, the dust collection attachment for the power tool can be attached at an appropriate position selected according to the type of work. In one embodiment of the present disclosure, the dust collecting unit may be attached in a different manner to each of the handle attachment parts. With this configuration, the handle attachment part can be selected according to the working style.

[0010] In one embodiment of the present disclosure, the power tool may have a tool accessory, and the dust collecting unit may be changeable in position relative to the tool accessory. With this configuration, the position of the dust collecting unit can be adjusted to suit the type of work being performed. In one embodiment of the present disclosure, the position of the dust collection unit may be changeable on a concentric circle with the center of the tool bit. With this configuration, even if the position of the dust collection unit is changed, the dust collection unit will not be too far away from or too close to the tool bit. In one embodiment of the present disclosure, the dust collection unit may have a dust collection port, and the orientation of the dust collection port relative to the tool bit may be changeable. With this configuration, the orientation of the dust collection unit can be changed to suit the type of work so that cutting chips can be efficiently collected. In one embodiment of the present disclosure, the dust collection unit may have an inner surface made of metal and at least a portion of an outer surface made of resin. With this configuration, metal chips generated during metalworking can be collected without any problems. In one embodiment of the present disclosure, the power tool may have a cover that partially covers the outside of the tool bit, and the attachment portion may be positioned in the axial direction of the tool bit by engaging with the cover. With this configuration, the attachment portion can be attached using the cover without rattle. [Example]

[0011] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a perspective view showing an example of a dust collection attachment for a power tool (hereinafter simply referred to as "attachment"). Fig. 2 is a front view of the attachment, and Fig. 3 is a side view of the attachment. In the description of the attachment alone, the surface on which the dust collection port of the dust collection unit is provided is referred to as the front (front). The attachment 1 includes a dust collecting section 2, a mounting section 3, and a thumb screw 4 that connects the dust collecting section 2 and the mounting section 3 together. The dust collection unit 2 has a band-shaped bottom plate 5 that extends in the front-to-rear direction. As shown in FIG. 9 , a box-shaped storage chamber 6 that is narrower in width than the bottom plate 5 is provided on the upper surface of the bottom plate 5. The upper part of the storage chamber 6 is formed in a semicircular shape when viewed from the side. A rectangular dust collection port 7 that extends in the up-down direction is formed in the lower front part of the storage chamber 6. The bottom plate 5 extends forward beyond the dust collection port 7. A pair of receiving plates 8, 8 are provided on the front surface of the storage chamber 6, with the distance between them increasing from the left and right sides of the dust collection port 7 toward the front. The lower ends of the receiving plates 8, 8 are connected to the bottom plate 5. Here, the bottom plate 5, the storage chamber 6, and the receiving plates 8, 8 are made of metal. As shown in Fig. 9, a resin cover 9 is placed over the storage chamber 6 from above and screwed in place. Above the receiving plates 8, 8 and behind the front surface of the storage chamber 6, a pair of through holes 10, 10 are formed that penetrate the storage chamber 6 in the left-right direction, including the cover 9.

[0012] The mounting portion 3 includes a pair of left and right side plates 15, 15 and an upper plate 16 connecting the upper ends of the side plates 15, 15. The side plates 15, 15 are located on the left and right outer sides of the cover 9 in the front of the storage chamber 6. The side plates 15, 15 are formed in an arc shape when viewed from the side. The side plates 15, 15 have arc-shaped elongated holes 17, 17 formed therein. The arc centers of the side plate 15 and the elongated holes 17 are located in front of the dust collecting portion 2. The left side plate 15 has an upper portion formed with a protruding piece 18 of the same arc shape that protrudes further forward than the lower portion. The upper plate 16 extends in the left-right direction, covering the upper front portion of the dust collecting unit 2. An attachment piece 19 is integrally formed on the right side of the upper plate 16. The attachment piece 19 protrudes further to the right than the right side plate 15 and further forward than the upper plate 16. A circular recess 20 is formed in the front right corner of the attachment piece 19. A through-hole 21 is formed in the center of the circular recess 20, penetrating the attachment piece 19 in the thickness direction. At the front end of the upper plate 16, a fitting recess 22 is formed by a protruding piece 18 and a mounting piece 19.

[0013] The knob screw 4 has a knob portion 26 integrally formed on the head of a bolt 25. The bolt 25 penetrates the elongated holes 17 and the through holes 10 from the left side of the mounting portion 3, with the elongated holes 17 of the side plates 15 positioned outside the through holes 10 of the storage chamber 6 and the cover 9. A nut 28 is screwed onto the tip of the bolt 25 that has penetrated the mounting portion 3 via a washer 27. Therefore, when the bolt 25 is tightened into the nut 28 by screwing in the knob 26, the left and right side plates 15, 15 are pressed against both sides of the cover 9, and the mounting part 3 is fixed to the dust collection part 2. When the knob 26 is turned in the reverse direction to loosen the bolt 25, the pressure on the side plates 15, 15 is released, and the relative position of the knob screw 4 can be changed within the range of the elongated holes 17, 17. This makes it possible to change the relative position of the dust collection part 2 and the mounting part 3, i.e., the angle of the dust collection port 7 with respect to the mounting piece 19.

[0014] 4 to 7 show an example in which the attachment 1 is attached to a grinder 50, which is an example of a power tool. Note that, in the attached state of the attachment 1, the front, back, left, right, and up and down directions will be described with reference to the grinder 50. The grinder 50 has a main body housing 51 that extends in the front-to-rear direction and houses a motor 52 (FIG. 8). A gear housing 53 with a spindle 54 protruding downward is attached to the front side of the main body housing 51. A battery pack 55, which serves as a power source, is attached to the rear side of the main body housing 51. A small-diameter grip portion 56 is formed at the rear of the main body housing 51. A disk-shaped tool bit (e.g., a grinding wheel) 57 is attached perpendicularly to the lower end of the spindle 54. A wheel cover 58 is attached to the gear housing 53. The wheel cover 58 has an upper surface portion 59 that is fan-shaped in a plan view and covers part of the upper surface of the tool bit 57 from above, and a peripheral surface portion 60 that is band-shaped in a side view and covers part of the peripheral surface of the tool bit 57 from the radially outer side.

[0015] As shown in FIG. 8 , screw holes 61, 61 are formed on the left and right side surfaces of the gear housing 53. An auxiliary handle 62 can be attached to the screw holes 61, 61. The auxiliary handle 62 has a linear auxiliary grip portion 63. The auxiliary grip portion 63 has a flange portion 64 at the end on the gear housing 53 side. An axial protrusion 65 that protrudes toward the gear housing 53 is formed at the center of the flange portion 64. A threaded portion 66 of a bolt provided at the axis of the auxiliary grip portion 63 protrudes from the protrusion 65. By screwing this threaded portion 66 into either of the screw holes 61, 61, the auxiliary handle 62 can be attached in a state where it protrudes diagonally forward from the side surface of the gear housing 53.

[0016] The attachment 1 can be attached to the screw holes 61, 61 together with the auxiliary handle 62. Here, as shown in FIG. 8, the screw portion 66 is passed through the through-hole 21 of the mounting piece 19 and then screwed into the screw hole 61 (here, the left side). At this time, as shown in FIGS. 4 and 6, the fitting recess 22 of the upper plate 16 is fitted into the peripheral surface portion 60 of the wheel cover 58. Then, the protrusion 65 of the auxiliary handle 62 fits into the circular recess 20 and presses the mounting piece 19 from the outside. Therefore, the mounting piece 19 is sandwiched between the protrusion 65 and the side surface of the gear housing 53 and fixed perpendicular to the screw portion 66. In this state, the fitting recess 22 of the mounting part 3 engages with the wheel cover 58, and the side plates 15, 15 are positioned above and below the peripheral surface part 60. At this time, the protruding piece 18 located on the lower side of the wheel cover 58 abuts along the lower surface of the peripheral surface part 60, as shown in Figure 7. Therefore, the mounting part 3 is positioned in the vertical direction (axial direction of the spindle 54) and fixed without rattle. When the mounting part 3 is fixed in this manner, the dust collection part 2 is supported laterally behind the tool bit 57. The dust collection port 7 of the storage chamber 6 faces the outer peripheral surface of the tool bit 57 from the rear and extends parallel to the outer peripheral surface. Parts of the receiving plates 8, 8 overlap the tool bit 57 in the vertical direction.

[0017] The operator holds the grip portion 56 of the main body housing 51 with one hand and the auxiliary grip portion 63 of the auxiliary handle 62 with the other hand to support the grinder 50. The operator then performs grinding work using the tool bit 57, which rotates in the direction of the solid arrow in Figure 7. At this time, chips scattered in the tangential direction indicated by the dotted arrow enter the storage chamber 6 through the dust collection port 7 and are stored there. The receiving plates 8, 8 are configured to open upward and downward toward the tool bit 57, so that the receiving plates 8, 8 can capture the chips and guide them to the dust collection port 7. If the direction of chip scattering changes depending on the grinding angle, etc., the knob portion 26 of the thumbscrew 4 can be loosened to move the dust collection unit 2 to any position along the elongated holes 17, 17, as shown by the two-dot chain line in FIG. 7 . When the attachment 1 is attached, the center of the arc of the elongated hole 17 coincides with the axis of the spindle 54 (the rotation center O of the tool tip 57). Therefore, the dust collection unit 2 can rotate about the rotation center O without changing the engagement state of the fitting recess 22 with the peripheral surface portion 60 or the abutment state of the protruding piece 18 with the underside of the peripheral surface portion 60. In other words, even when the position of the dust collection unit 2 is adjusted, the orientation of the dust collection port 7 can be changed without moving away from the tool tip 57, and the dust collection port 7 can capture the chips and store them in the storage chamber 6.

[0018] In this way, in the attachment 1 and grinder 50 of Example 1, the mounting portion 3 of the attachment 1 can be attached using a screw hole 61 (handle mounting portion) provided in the grinder 50 (power tool) to attach the auxiliary handle 62. That is, the screw hole 61 for attaching the auxiliary handle 62 can also be used for attaching the attachment 1. Therefore, the attachment 1 can be attached to the grinder 50 with a simple structure. Also, the external space of the grinder 50 can be effectively used for the attachment 1.

[0019] The mounting portion 3 can be mounted to the screw hole 61 by attaching the auxiliary handle 62. Therefore, the attachment 1 can be mounted at the same time as the operation of attaching the auxiliary handle 62, which simplifies the mounting work. The mounting portion 3 is mounted by being sandwiched between the auxiliary handle 62 attached to the screw hole 61 and the grinder 50. Therefore, the attachment 1 can be clamped and fixed at the same time as the auxiliary handle 62 is attached. The auxiliary handle 62 has a threaded portion 66 at its tip, and the handle attachment portion is a screw hole 61 into which the threaded portion 66 is screwed. Therefore, the attachment 1 can be reliably fixed. The grinder 50 is provided with two (plural) screw holes 61, and the mounting part 3 can be mounted to either of the screw holes 61. Therefore, the attachment 1 can be mounted by selecting an appropriate position according to the type of work. The dust collecting unit 2 has a different mounting manner for each screw hole 61. Therefore, the screw hole 61 can be selected according to the working mode.

[0020] The grinder 50 has a tool tip 57, and the position of the dust collecting unit 2 is changeable relative to the tool tip 57. Therefore, the position of the dust collecting unit 2 can be adjusted to suit the type of work. The position of the dust collection unit 2 can be changed on a concentric circle with the rotation center O of the tool bit 57. Therefore, even if the position of the dust collection unit 2 is changed, the dust collection unit 2 will not become too close or too far away from the tool bit 57. The dust collection unit 2 has a dust collection port 7, and the orientation of the dust collection port 7 relative to the tool bit 57 can be changed. Therefore, the orientation of the dust collection unit 2 can be changed to one that allows efficient collection of chips according to the type of work. The dust collection unit 2 has an inner surface made of metal and a part of its outer surface made of resin, so that metal chips generated during metalworking can be collected without any problems. The grinder 50 has a wheel cover 58 (cover) that partially covers the outside of the tool bit 57, and the attachment part 3 is positioned in the axial direction of the tool bit 57 by engaging with the wheel cover 58. Therefore, the attachment part 3 can be attached without rattle by using the wheel cover 58.

[0021] Next, a modification of the first embodiment will be described. The shape of the dust collection unit can be changed as appropriate. For example, it may be an arc-shaped box with a dust collection port opening along the outer periphery of the tool bit. The dust collection unit may also be moved relative to the attachment unit by fitting a convex portion on one side of the dust collection unit or the attachment unit into an arc-shaped concave portion on the other side, without passing the thumb screw through. However, the dust collection unit is not limited to moving concentrically with the center of the tool bit, and may also move linearly. The dust collecting portion may have an outer surface entirely made of resin. The dust collecting portion is not limited to such a double structure, and may be made of only metal or only resin. In the above embodiment, the attachment is attached to the left screw hole, but the attachment together with the auxiliary handle may be attached to the right screw hole. In this case, the orientation of the dust collection unit and the attachment unit may or may not be symmetrical with respect to the attachment to the left screw hole. [Example]

[0022] In the first embodiment, the attachment is attached to the handle mounting portion by attaching the auxiliary handle, but the attachment may be attached to the handle mounting portion alone without the auxiliary handle. The following describes such an embodiment. The power tool is the same grinder as in the first embodiment. The attachment 1A shown in FIGS. 10 and 11 includes a dust collecting section 30, an attachment section 31, and an arm 32 that connects the dust collecting section 30 and the attachment section 31 together. The dust collection unit 30 is provided with a frame 34 at the tip of a linearly extending support arm 33. The support arm 33 and frame 34 are made of metal or fire-resistant resin. The frame 34 extends in an extension of the support arm 33 and is curved in an arc shape as a whole. The tip of the frame 34 is tapered. A wire mesh 35 is stretched on the inner surface surrounded by the frame 34. A pair of connecting pieces 36, 36 protrude from the end of the support arm 33 opposite the frame 34.

[0023] The arm 32 is made of resin. One end of the arm 32 is inserted between the connecting pieces 36, 36 and connected by a bolt 37 and a nut 38. The bolt 37 is provided parallel to the short width direction of the frame body 34. A hemispherically expanding cup 39 is integrally formed at the other end of the arm 32. Multiple notches 40, 40... are formed in the cup 39 from the expanding end toward the center, allowing the cup 39 to elastically deform in the expanding and contracting directions. A screw 41 is threaded into the cup 39 from the outside. The mounting part 31 includes a resin sphere 45 and a threaded part 46 protruding from the sphere 45. The threaded part 46 can be threaded into screw holes 61, 61 of the grinder 50. A ball joint 47 is formed by fitting the cup 39 of the arm 32 onto the sphere 45. This ball joint 47 connects the arm 32 to the mounting part 31 so that the arm 32 can rotate in all directions. When the screw 41 is screwed in at a selected angle, the screw 41 presses against the sphere 45, and the arm 32 can be fixed via the cup 39. Thus, attachment 1A has, between dust collecting part 2 and mounting part 3, joint part 48A that is rotatable around bolt 37, and joint part 48B that is rotatable in all directions by ball joint 47.

[0024] The attachment 1A can be attached to the screw holes 61, 61 to which the auxiliary handle 62 is not attached. Here, as shown in Figures 12 and 13, the screw portion 46 of the attachment part 31 is screwed into the screw hole 61 (on the right side in this case). Then, the attachment part 31 is fixed to the right side surface of the gear housing 53. Once the mounting part 31 is fixed in this manner, the dust collection part 30 can be adjusted to any position and angle using two joints 48A and 48B, as shown by the two-dot chain lines in Figures 14 and 15. That is, the support arm 33 is rotated around the bolt 37 using joint 48A, and the arm 32 is rotated to a desired angle around the sphere 45 using joint 48B. This allows the wire mesh 35 of the frame 34 to be oriented in the tangential direction of the tool bit 57, from which chips are scattered. If necessary, the operator attaches an auxiliary handle 62 to the left screw hole 61 to which the attachment 1A is not attached. Then, the operator supports the grinder 50 and performs grinding work with the tip tool 57. At this time, chips scattered in the tangential direction indicated by the dotted arrow in FIG. 14 come into contact with the wire mesh 35 of the frame 34 and are collected by the wire mesh 35. Chips that are not collected fall below the frame 34.

[0025] In this way, in the attachment 1A and grinder 50 of Example 2, the mounting portion 31 of the attachment 1A can be mounted using a screw hole 61 (handle mounting portion) provided in the grinder 50 (power tool) to mount the auxiliary handle 62. That is, the screw hole 61 for attaching the auxiliary handle 62 can also be used for attaching the attachment 1A. Therefore, the attachment 1A can be attached to the grinder 50 with a simple structure. Also, the space on the side of the grinder 50 can be effectively used for the attachment 1A.

[0026] The grinder 50 is provided with two (plural) screw holes 61, and the mounting portion 31 can be mounted to either of the screw holes 61. Therefore, the attachment 1A can be mounted by selecting an appropriate position according to the type of work. The dust collecting unit 30 has a different mounting manner for each screw hole 61. Therefore, the screw hole 61 can be selected according to the working mode. The position of the dust collecting unit 30 relative to the tool bit 57 can be changed. Therefore, the position of the dust collecting unit 30 can be adjusted to suit the type of work. The orientation of the dust collection unit 30 relative to the tool bit 57 can be changed. Therefore, the orientation of the dust collection unit 30 can be changed to suit the type of work so that cutting chips can be efficiently collected.

[0027] Next, a modification of the second embodiment will be described. The shape and size of the frame are not limited to those in the above embodiment. For example, the width and depth of the frame may be increased. The wire mesh may also be formed into a basket shape and be deep. The joint between the mounting part and the arm can also be changed as needed. In the above embodiment, the mounting part is a sphere and the arm is a cup, but the opposite can be true, with the mounting part being a cup and the arm being a sphere. Universal joints other than ball joints can also be used. A uniaxial joint using a bolt or the like is also acceptable. The joint between the arm and the dust collecting unit is not limited to the above embodiment. For example, a ball joint similar to that used on the mounting unit side can also be used. The dust collecting unit and the mounting unit may be connected not only by one arm but also by multiple arms, providing three or more joints. Each joint can be selected. Flexible arms can also be used. However, the arm can be omitted, and the dust collecting unit can be directly connected to the mounting unit.

[0028] In addition, in common with each embodiment, the positions and number of screw holes provided in the grinder can be changed as appropriate. The handle attachment portion is not limited to screw holes. The power tool may be an AC tool rather than a DC tool. The power tool is not limited to a grinder. The attachment of the present disclosure can be attached to other grinding and polishing tools such as sanders and polishers, and cutting tools such as circular saws and cutters, as long as they have a handle attachment portion. Therefore, the power tool is not limited to an electric tool. The attachment of the present disclosure can also be used with air tools, engine tools, etc. The attachment of the present disclosure can be used for work other than metalworking. [Explanation of symbols]

[0029] 1, 1A·· dust collection attachment for power tool, 2, 30·· dust collection part, 3, 31·· mounting part, 4·· thumb screw, 5·· bottom plate, 6·· storage chamber, 7·· dust collection port, 8·· receiving plate, 9·· cover, 15·· side plate, 16·· upper plate, 17·· elongated hole, 18·· protruding piece, 19·· mounting piece, 21·· through hole, 22·· fitting recess, 25, 37·· bolt, 32·· arm, 33· ·Support arm, 34··Frame body, 35··Wire mesh, 39··Cup, 45··Sphere, 46··Threaded portion, 50··Grinder, 51··Main body housing, 52··Motor, 53··Gear housing, 54··Spindle, 57··Tip tool, 58··Wheel cover, 60··Peripheral portion, 61··Threaded portion, 62··Auxiliary handle, 66··Threaded portion, O··Center of rotation.

Claims

1. A dust collection attachment for a power tool, comprising: a mounting portion for mounting an auxiliary handle to a power tool to which the auxiliary handle can be attached; and a dust collection portion connected to the mounting portion, the power tool has a tool bit and a handle attachment portion for attaching the auxiliary handle, The attachment portion is attached to the power tool by being sandwiched between the auxiliary handle and the power tool when the auxiliary handle is attached to the handle attachment portion; 10. A dust collection attachment for a power tool, wherein the dust collection unit is changeable in position relative to the tool bit on a circle concentric with the center of the tool bit.

2. A dust collection attachment for a power tool, comprising: a mounting portion for mounting an auxiliary handle to a power tool to which the auxiliary handle can be attached; and a dust collection portion connected to the mounting portion, The power tool includes a tool bit, a cover that partially covers the outside of the tool bit, and a handle attachment portion for attaching the auxiliary handle. the attachment portion is attached to the power tool by being sandwiched between the auxiliary handle and the power tool when the auxiliary handle is attached to the handle attachment portion, and is positioned in the axial direction of the tool bit by engaging with the cover; 10. A dust collection attachment for a power tool, wherein the dust collection unit is changeable in position relative to the tool bit.

3. A dust collection attachment for a power tool, comprising: a mounting portion for mounting an auxiliary handle to a power tool to which the auxiliary handle can be attached; and a dust collection portion connected to the mounting portion, the power tool has a handle attachment portion for attaching the auxiliary handle; The attachment portion is attached directly to the handle attachment portion to which the auxiliary handle is not attached, A dust collection attachment for a power tool, characterized in that the mounting portion and the dust collection portion are connected via an arm, and the arm is connected to the mounting portion by a ball joint so that it can rotate in all directions.

4. 4. The dust collection attachment for a power tool according to claim 3, wherein the dust collection portion and the end of the arm opposite the ball joint are connected by a bolt so as to be rotatable with each other around the bolt.

5. 5. The dust collecting attachment for a power tool according to claim 1, wherein the auxiliary handle has a threaded portion at a tip thereof, and the handle attachment portion is a threaded hole into which the threaded portion is screwed.

6. 6. A dust collection attachment for a power tool according to claim 1, wherein the power tool has a plurality of handle mounting portions, and the mounting portion can be attached to any of the handle mounting portions.

7. 3. The dust collection attachment for a power tool according to claim 2, wherein the position of the dust collection part is changeable on a circle concentric with the center of the tool bit.

8. 3. The dust collection attachment for a power tool according to claim 1, wherein the dust collection unit has a dust collection port, and the orientation of the dust collection port relative to the tool bit is changeable.

9. 9. The dust collecting attachment for a power tool according to claim 1, wherein the dust collecting portion has an inner surface made of metal and at least a part of an outer surface made of resin.

10. 2. The dust collection attachment for a power tool according to claim 1, wherein the power tool has a cover that partially covers the outside of the tool bit, and the mounting portion is positioned in the axial direction of the tool bit by engaging with the cover.

11. A power tool comprising: a handle attachment portion to which an auxiliary handle can be attached; and a dust collecting attachment for a power tool according to any one of claims 1 to 10 attached to the handle attachment portion.

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