JP2008207360A - Power tool with dust collection mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drilling tool having a dust collection mechanism which can minimize a product without reducing a dust collection capacity and hold a firm dust collection case. <P>SOLUTION: The drilling tool has a front edge tool, a motor, a rotation transmission mechanism which transmits the rotational power of the motor to the front edge tool, and the dust collection case for storing dust generated by drilling on the rotational movement of the front edge tool. The dust collection case is attachable/detachable to/from the drilling tool and has at least two holding parts which hold the drilling tool and the dust collection case. The holding parts are installed approximately on the diagonals of the dust collection case. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drilling tool driven by an electric motor or an engine for mainly drilling a hole in a stone material such as concrete or brick. The present invention relates to a drilling tool having a dust collecting mechanism that can improve the environment.

  Conventionally, a drill tool, a hammer drill for rotating and hitting a tip tool, a vibration drill, a hammer and the like are generally used as a drilling tool for drilling a hole in a stone material such as concrete or brick. Since dust is generated when a drilling operation is performed using a drilling tool, an operator wears a dust mask or protective glasses.

  In order to suppress the generation of dust during drilling work and improve the working environment, a drilling tool with a built-in dust collecting fan and a dust collecting mechanism for sucking up dust is used.

The conventional hammer drill described above is
An object of the present invention is to provide a drilling tool having a dust collecting case that is detachable from a drilling tool or a dust collector that is a part of the drilling tool, and the dust collecting case is a part of the drilling tool or the drilling tool. For example, vibration is suppressed and held firmly.

  It is another object of the present invention to provide a drilling tool in which the dust collecting case does not come off unexpectedly. Moreover, it can suppress that dust comes out of a dust collection case.

  The object is to provide a tip tool, a motor, a motion conversion mechanism that converts the rotation of the motor into a rotational motion of the tip tool, a motion conversion mechanism that converts the rotation of the motor into a striking motion of the tip tool, A drilling tool having a dust collection device for collecting dust generated by drilling by rotating motion, striking motion, or both rotational motion and striking motion of a tip tool, wherein the dust collecting case includes the drilling tool and It has at least two holding parts for holding the dust collecting case, and the holding parts are provided on a substantially diagonal line of the dust collecting case and can be achieved by a drilling tool.

  According to the present invention, in the hammer drill of this embodiment, the dust collection case is detachable from the drilling tool, and the dust collection case is held on the substantially diagonal line of the dust collection case to the drilling tool. The center of gravity of the dust collecting case is positioned on the diagonal line. Therefore, when the drilling tool vibrates during drilling, since the center of gravity of the dust collecting case is on the holding axis, it is possible to suppress the dust collecting case from vibrating. Thereby, it is possible to suppress the dust collecting case from vibrating and dust from coming out of the dust collecting case. Further, it is possible to provide a drilling tool in which the dust collecting case does not come off unexpectedly due to vibration.

  An embodiment of the drilling tool of the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a cross-sectional view of a main part of a hammer drill which is an example of the drilling tool of the present invention.

  As shown in FIG. 1, the hammer drill according to the present invention includes a gear housing 1, a motor housing 2, a handle 3, a tip tool holding portion 4 to which a tip tool 26 can be attached and detached, and a dust collecting mechanism. Yes.

  The hammer drill of this embodiment can be switched between at least three operation modes: a rotation / striking mode for transmitting the rotational force and the striking force to the tip tool 26, a rotation mode for imparting only the rotational force, and a striking mode for imparting only the striking force By configuring and rotating the switching member 6 provided on the side portion of the gear housing 1, the internal switching mechanism operates and the operation mode is switched. A hammer drill cuts and drills a workpiece by striking or rotating or striking and rotating. At that time, the hammer drill generates vibration. At this time, the striking motion is caused by the reciprocating motion of the tip tool 26.

  The handle 3 has a configuration in which one end is connected to the gear housing 1 and the other end is connected to the motor housing 2 and includes a power switch 3a and an electric cord 5 for feeding.

  A motor 18 is provided inside the motor housing 2, and a cooling fan 17 is provided on a rotating shaft 19 of the motor 18 so as to be rotatable integrally with the rotating shaft 19. When the motor 18 rotates and the cooling fan 17 rotates, cooling air flows into the motor housing 2 through a cooling air inlet (not shown) of the tail cover 16 attached to the lower end of the motor housing 2 (lower side in FIG. 1). Then, the motor 18 is cooled. The cooling air that has passed around the motor 18 is discharged to the outside through a discharge port (not shown).

  The tip tool 26 has a tip portion 26a and a spiral portion 26b. In response to the rotation of the motor 18, the tip tool 26 rotates to cut and drill a workpiece.

  The dust collection mechanism is located between the gear housing 1 and the motor housing 2 and has a portion to be sandwiched and a portion (a left side portion in FIG. 1) that protrudes between the motor housing 2 and the tip tool 26. The housing 8 is provided. As shown in FIG. 2, the dust collection housing 8 has a first opening 8a, a second opening 8b, a third opening 8c, and a recess 8d.

  Inside the dust collection housing 8 and on the rotating shaft 19 of the motor 18, a dust collecting fan 14 that can rotate integrally with the rotating shaft 19 is provided. When the motor 18 rotates and the dust collecting fan 14 rotates. The air flows into the dust collecting housing 8 through the third opening 8c, and the air is discharged to the outside through a discharge port (not shown).

  The dust collection case 12 has a latch portion 12 b that can be engaged with a recess 8 d of the dust collection housing 8 and a latch portion 12 b that is a part of the tail cover 16 provided in the motor housing 2. Has a configuration.

  On the diagonal line of the dust collecting case 12, a concave portion 8d and a concave portion 16a, and a convex portion 12a and a latch portion 12b are provided.

Concave portions 8d, 16a, 12a and 12b in which the dust collection case 12 is the above-described engaging portion
It is connected to the main body via.

  Thus, the dust collection case 12 has the convex part 12a and the latch part 12b on the substantially diagonal line of a dust collection case.

  The convex portion 12 a provided in the dust collection case 12 can be engaged with the opening 8 d of the dust collection housing 8. Further, the latch portion 12b of the dust collecting case can be engaged with the concave portion 16a. Moreover, by removing these engagements, the dust collecting case 12 can be detached from the hammer drill.

  The second opening 8b of the dust collecting housing 8 and the first opening 12c of the dust collecting case 12 are connected, and the third opening 8c of the dust collecting housing 8 and the second opening 12d of the dust collecting case 12 are connected. And are connected. A seal member 20 is provided in the dust collection housing 8. The upper end of the dust collecting case 12 is in contact with the dust collecting case 12 so that it can expand and contract in the insertion direction of the dust collecting case 12.

  The seal member 20 shown in FIG. 4 fills the gap between the second opening 8b of the dust collecting housing 8 and the joint portion on the outer periphery of the first opening 12c of the dust collecting case 12, and the dust collecting housing 8 The gap between the third opening 8c and the second opening 12d of the dust collecting case 12 is filled. Here, the first opening 12 c of the dust collection case 12 is an inflow port through which air and dust flow into the dust collection case 12. The second opening 12 d of the dust collection case 12 is an outlet that allows air to flow out of the dust collection case 12. The seal member 20 can prevent air and dust from coming out from the joint between the dust collecting housing 8 and the dust collecting case 12 in the vicinity of the inlet and the outlet.

  Here, the lower outer periphery of the second opening 8 b and the lower outer periphery of the third opening 8 c of the dust collecting housing 8, which are the portions in contact with the seal member 20, and the first opening 12 c of the dust collecting case 12. The upper outer periphery and the upper outer periphery of the second opening 12d, and the portion in contact with the seal member 20 is a joint portion.

  The connection between the second opening 8b of the dust collecting housing 8 and the first opening 12c of the dust collecting case 12, and the third opening 8c of the dust collecting housing 8 and the second opening 12d of the dust collecting case 12. As described above, the connection is made by engaging the latch portion 12b of the dust collecting case with the concave portion 16a of the tail cover.

  Further, the first opening 12 c of the dust collection case 12 is provided in the upper part of the dust collection case 12.

  As shown in FIG. 4, the seal member 20 is provided on one plane. As a result, the seal member is formed as an integral part. As shown in FIG. 2, the first opening 12c of the dust collecting case 12 and the second opening 12d of the dust collecting case 12 are both provided in the same direction with respect to the dust collecting case. The first opening 12c of the dust collection case 12 and the second opening 12d of the dust collection case 12 are provided on substantially the same plane.

  The plane of the connecting portion between the second opening 8b of the dust collecting housing 8 and the first opening 12c of the dust collecting case 12, and the third opening 8c of the dust collecting housing 8 and the second opening of the dust collecting case 12. This is because the plane of the connecting portion of the portion 12d is on the same plane.

  A filter 13 that can be fixed to the dust collection case 12 is provided inside the dust collection case 12. In addition, the dust collection case 12 includes a dust storage unit 21 and an air passage 15. The filter 13 is located between the dust storage unit 21 and the air passage 15, and air can flow into the air passage 15 via the filter 13, but the dust is captured by the filter and the dust storage unit 21. It stays inside and is collected.

  As shown in FIG. 1, the support member 31 is disposed between the tip tool 26 and the motor 18 in a state where the axial extension line of the rotating shaft 19 of the motor 18 is orthogonal to the axial extension line of the tip tool 26. Is provided.

  The support member 31 includes cylindrical members 31a, 31b, and 31c. That is, it has the 1st slider 31a which is a cylindrical member, and the 2nd slider 31b which is a cylindrical member. The cylindrical member 31 c is fixed to the gear housing 1 and the dust collecting housing 8. The cylindrical member 31c has an opening, and the second slider 31b is slidably supported inside the cylindrical member 31c, and is provided so as to protrude from the opening of the cylindrical member 31c. In other words, the diameters of the plurality of cylindrical members become smaller as they approach the dust collection adapter 10. It is possible to change the relative positional relationship between the first slider 31a and the second slider 31b. That is, since the first slider 31a and the second slider 31b are both cylindrical, it is possible to change the sum of the lengths of the first slider 31a and the second slider 31b in the direction of the tip tool 26. is there.

  Similarly, the relative positional relationship between the second slider 31b and the cylindrical member 31c can be changed. That is, the second slider 31b and the cylindrical member 31c are both cylindrical, and the second slider 31b slides inside the cylindrical member 31c, so that the tip tool of the second slider 31b and the cylindrical member 31c. It is possible to change the sum of the lengths for the 26 directions. The second slider 31b is slidably supported by the inner wall of the cylindrical member 31c.

  Thereby, the length of the support member 31 with respect to the direction of the tip tool 26 can be changed. This is because the length of the support member 31 in the direction of the tip tool 26 depends on the sum of the lengths of the first slider 31a, the second slider 31b, and the cylindrical member 31c in the direction of the tip tool 26.

  A dust collection adapter 10 is provided on the side of the first slider 31a opposite to the second slider 31b, and the first slider 31a and the dust collection adapter 10 are fixedly attached.

  The second slider 31b has an opening, and the first slider 31a is slidably supported inside the second slider 31b and is provided so as to protrude from the opening of the second slider 31b. . The insides of the first slider 31a, the second slider 31b, and the cylindrical member 31c are in communication with each other. From the cylindrical member 31c to the first slider 31a, the opening of the cylindrical member 31c and the opening of the second slider 31b The cylindrical member 31c communicates with the first slider 31a via the portion. A spring 32 is provided in the communicating internal space, and one end of the spring 32 is in contact with the bottom of the cylindrical member 31c on the side opposite to the opening, and the other end is on the anti-second slider of the first slider 31a. It is in contact with the 31b side. The first slider 31a is biased from the tubular member 31c toward the dust collecting adapter 10 and away from the tip tool. Therefore, the dust collection adapter 10 fixed to the first slider 31a is urged in a direction away from the tip tool.

  One end of the dust collection hose 11 is connected to the dust collection adapter 10. The other end of the dust collection hose 11 is connected to the first opening 8 a of the dust collection housing 8.

  The dust collection adapter 10 has a hole through which the tip tool 26 is inserted. Further, although not shown in the figure, a brush is provided in the hole to close the gap between the tip tool 26 and the hole. Thereby, it is suppressed that dust leaks from tip tool 26 and a hole.

  The structure of the dust collection case 12 will be described.

  5 is a cross-sectional view taken along the line AA in FIG. The dust collection case 12 includes a first dust collection case housing 12x and a second dust collection case housing 12y. The filter fixing portion 22 is sandwiched between the first dust collection case housing 12x and the second dust collection case housing 12y. As shown in FIG. 5, the filter 13 includes a large number of filter ridge portions 13 a having a shape extending in the axial direction of the tip tool 26. A space 13v in the filter fold 13a communicates with the air passage 15. In addition, a part of the filter 13 is fixed to the filter fixing portion 22 at the side end portion of the filter 13. Although not shown, the filter fixing portion 22 is located substantially on the periphery of the joint between the dust storage portion 21 and the air passage 15, and dust does not move to the air passage 15 from the vicinity of the filter fixing portion 22. So that it is firmly attached.

  The inside of the dust collection case 12 is divided into two parts by the filter 13. One is the dust collection storage unit 21, and the other is the air passage 15.

  6 is a cross-sectional view taken along the line BB of FIG. As shown in FIG. 6, the filter fold portion 13a has a filter fold portion upper surface 13x and a filter fold portion lower surface 13y at the upper and lower portions thereof. The filter fold part 13a has a filter fold part side face 13z.

  The filter ridge portion side surface 13z has an upper end that is one end connected to the filter fold portion upper surface 13x and a lower end that is the other end connected to the filter fold portion lower surface 13y. The connection is made with an adhesive, and air cannot enter the air passage from the upper surface, the lower surface, and the bonded portion. In FIG. 6, the space 13 v inside the filter fold 13 a communicates with the air passage 15. Further, a slight gap 13w is provided between the adjacent filter fold part side faces 13z. That is, a slight gap 13w is provided between adjacent filter folds 13a.

  Thus, since the filter 13 has the filter ridge part 13a and the slight gap 13w is provided between the adjacent filter fold parts 13a, the surface area of the filter 13 on the dust storage part 21 side is large. Thus, the air can be moved to the air passage 15 in a large area, and the air can be moved smoothly. Further, since the space 13v inside the filter fold 13a communicates with the air passage 15, the surface area on the side of the air passage 15 inside the filter 13 increases, and air is supplied to the air passage 15 in a large area. It becomes movable and can move air smoothly. Therefore, the dust collection efficiency can be increased.

  The operation of the hammer drill of the present invention will be described with reference to FIGS.

  The hammer drill of the present invention is supplied with power through the electric cord 5. The hammer drills by the electricity. When the operator operates the power switch 3 a provided on the handle 3, the motor 18 is driven to rotate, and the drilling operation is started by the tip tool 26. Further, when the motor 18 is rotated, the dust collecting fan 14 is rotated, and dust generated by drilling with the tip tool 26 together with the air is collected with the dust collecting adapter 10, the dust collecting hose 11, and the dust collecting as shown by the arrows in FIG. Flows into the dust collecting case 12 through the housing 8.

  Due to the rotation of the motor 18, the dust collection fan 14 provided on the rotating shaft 19 of the motor 18 so as to rotate integrally is rotated. When the rotation of the dust collecting fan 14 is rotated, air accompanied by dust moves from the dust collecting adapter 10 in the direction of the arrow shown in FIG. The air with the dust flows from the dust collection adapter 10 to the dust collection hose 11 as shown by the arrow in FIG. Thereafter, the air with the dust flows from the first opening 8a of the dust collection housing 8 shown in FIG. 2 into the dust collection housing 8 as shown by the arrow in FIG. Thereafter, the air flows from the second opening 8b of the dust collecting housing 8 shown in FIG. 2 to the first opening 12c of the dust collecting case 12 shown in FIG. 2 as shown by the arrow in FIG. Inflowed air with dust is separated into air and dust by the filter 13. At that time, the air with dust may collide with the filter upper surface 13x or the filter lower surface 13y of FIG. The dust stays in the dust storage unit 21, and the air passes through the filter 13 and flows into the air passage 15, and the dust collection housing 8 shown in FIG. 2 from the second opening 12 d of the dust collection case 12 shown in FIG. 2. Into the third opening 8c as shown by the arrow in FIG. The air flowing into the dust collection housing 8 is discharged to the outside through a discharge port provided in the dust collection housing 8 (not shown).

  When performing a drilling operation using a hammer drill, it is necessary for the operator to press the hammer drill in the direction of the work material in accordance with the drilling.

  When the operator presses the hammer drill in the direction of the workpiece, the hammer drill punches the workpiece with the tip portion 26a of the tip tool 26.

  The dust collection adapter 10 in FIG. 1 is located closer to the hammer drill than the tip of the tip tool 26. Since the drilling has progressed, the dust collection adapter 10 is closer to the hammer drill than at the start of drilling. Since dust is generated from the vicinity of the surface of the work material, the dust collection adapter 10 is positioned at that position. In FIG. 1, in the state in which no drilling is performed, the first slider 31 a is biased from the tubular member 31 c toward the dust collection adapter 10, so that the dust collection adapter 10 is located near the tip portion 26 a of the tip tool 26. Is located.

  In the present invention, the dust collecting adapter 10 is urged to the anti-hammer drill side by a spring 32. As the drilling proceeds, the distance between the hammer drill and the vicinity of the surface of the workpiece is shortened. At that time, in order for the tip tool 26 to pierce the workpiece, the dust collecting adapter 10 is pushed toward the hammer drill by the workpiece.

  When the drilling is advanced, the spring 32 contracts due to the pressing force between the hammer drill and the workpiece, so that the length of the support member 31 in the direction of the tip tool 26 is shortened. Therefore, the dust collection adapter 10 is positioned at a position corresponding to the depth of the perforation by the support member 31.

Here, the spring 32 biases the first slider 31a to the anti-hammer drill side, but does not bias the second slider 31b in the practice of the present invention.
As the drilling progresses, the dust collection adapter 10 is fixed to the first slider 31a, and therefore gradually approaches the hammer drill side. In the state where the drilling progresses, the second slider 31b freely moves. It becomes slidable.

  Further, in the state in which the drilling has progressed and the drilling has been performed most deeply, the end on the side opposite to the hammer drill of the second slider 31 b comes into contact with the dust collecting adapter 10. Further, the end opposite to the hammer drill of the cylindrical member 31 c comes into contact with the dust collecting adapter 10. That is, when the drilling proceeds to the end of the spiral portion 26b on the side opposite to the distal end portion 26a, the length of the support member 31 in the direction of the drilling tool 26 is substantially the length of the cylindrical member 31c.

  As shown in FIG. 2, when removing the dust collecting case 12 from the hammer drill, the engagement between the dust collecting housing 8 and the recess 16a provided in the motor housing 2 and the latch portion 12b is released. The disengagement between the latch portion 12b of the dust collecting case 12 and the concave portion 16a means that an external force equal to or greater than the engaging force between the latch portion 12b of the dust collecting case 12 and the concave portion 16a as shown in FIG. It can be done by giving in the direction of Thereby, the dust collecting case 12 rotates around the convex portion 12a of the dust collecting case 12 engaged with the concave portion 8d of the dust collecting housing 8.

  After disengaging the latch portion 12b and the concave portion 16a of the dust collection case 12, the convex portion 12a of the dust collection case 12 can be disengaged from the concave portion 8d of the dust collecting housing 8.

  A second embodiment of the present invention will be described with reference to FIG.

  In FIG. 3, a knob 33 is provided on the support member 31. The knob 33 makes it possible to adjust the positions of the cylindrical member 31c, which is a part of the support member 31 at the start of drilling, and the dust collecting adapter 10.

  Specifically, the knob 33 can slide in a direction perpendicular to the axial direction of the cylindrical member 31. In this embodiment, the cylindrical member 31c is internally threaded, and the knob 33 is externally threaded. Further, the end portion of the knob 33 can be inserted into the cylindrical member 31c and contact the second slider 31b. By the contact of the knob 33, the second slider 31b can be fixed at a position relative to the cylindrical member 31c, and cannot slide.

  The tip tool 26 of the hammer drill in FIG. 3 is shorter than the tip tool 26 in FIGS. 1 and 2. In such a case, when the tip tool 26 having the length shown in FIGS. 1 and 2 is used, considering that there is no knob 33 in the length of the tip tool 26 shown in FIG. The adapter 10 and the support member 31 have to push the hammer drill by the short part of the drilling tool 26, and the dust collecting adapter 10 must be positioned in the vicinity of the tip end portion 26a. Therefore, perforation does not start and dust collection is not performed.

  In such a case where the tip tool 26 is short, the initial length of the support member 31 is adjusted by a knob 33, as shown in FIG. Yes.

  As shown in FIG. 3, the movement of the relative position between the second slider 31b and the cylindrical member 31c is fixed by the knob 33, and the distance of the adapter movement is shortened. That is, by providing the knob 33, the dust collection adapter 10 can be positioned in the vicinity of the distal end portion 26a of the distal end tool 26 at the start of drilling.

  According to the present invention, it is possible to obtain a large sliding amount of the dust collecting adapter, but even if the dust collecting adapter is positioned on the main body side, the support member does not protrude, and drilling with a long tip tool is possible. Even so, it is possible to provide a drilling tool having a high dust collection rate and good workability.

  As described above, by providing an urging means for urging the support member in the direction in which the dust collection adapter is separated from the main body, the dust collection adapter comes into contact with the work material during drilling work, and the dust collection adapter is Since it comes to be located near, a drilling tool with a high dust collection rate can be provided.

  Further, a plurality of stages of expansion and contraction of the support member is achieved by configuring the support member with a plurality of cylindrical members and slidingly supporting at least one cylindrical member with the inner wall of another cylindrical member. Thus, the load at the time of sliding can be supported in a wide range, and the dust collecting adapter can be smoothly slid and a drilling tool having good workability can be obtained.

  Further, by adopting a configuration in which the diameter of the cylindrical member becomes smaller as it goes to the dust collecting adapter side, the area of the sliding support is small on the dust collecting adapter side, and the area of the sliding support is large on the main body side. The structure is suitable for the load applied during movement, and a long-life drilling tool can be obtained.

  Further, by arranging the urging means inside the cylindrical member, it is possible to suppress the urging means from coming into contact with another member and being deformed.

  Further, the expansion and contraction of the support member in a plurality of stages is achieved by configuring the support member with a plurality of members and making at least two members slidable with respect to adjacent members, and sliding at least one member. By providing the restricting means for restricting, the sliding amount of the dust collecting adapter can be restricted, for example, the perforation depth can be restricted.

  Further, in addition to the above, by providing an urging means for urging the support member in a direction in which the dust collection adapter is separated from the main body, the dust collection adapter before the start of the drilling operation can be made according to the length of the tip tool. The initial position away from the main body can be changed, and workability can be improved.

  In addition, the axial extension line of the motor is perpendicular to the axial extension line of the tip tool, and the support member is arranged between the tip tool and the motor, so that the size seen in the drilling direction is small. It is possible to reduce the problems such as contact with other members during work, and improve workability.

  Further, according to the present invention, the dust collection case has an inflow port for allowing air and dust to flow into the dust collection case and an outflow port for allowing air to flow out, and the inflow port and the outflow port are in the same direction. As a result, the dust collecting case 12 can be joined only by positioning the dust collecting case 12 in one direction with respect to the dust collecting housing 8. If they are not in the same direction, positioning in the two directions is unavoidable.

  Further, since the inflow port and the outflow port are on substantially the same plane, the dust collecting case 12 is positioned in only one direction with respect to the dust collecting housing 8 and can be more easily joined. It is something that can be done.

  In addition, when the tip tool reciprocates at the time of impact, the hammer drill vibrates due to a reaction force received from the workpiece, but the direction sealed by the seal member is substantially parallel to the reciprocating direction. For this reason, even when vibrating, it is possible to prevent air with dust from coming out from the seal portion.

  In addition, by arranging the inlet at the upper part of the dust collection case, when an operator removes the dust collection case from the hammer drill, dust does not fall from the dust collection case.

  In addition, the inlet and the outlet are sealed with a seal member, and the seal member is provided at the inlet and the outlet, which are an integral part, thereby simplifying the seal member and simplifying the structure. Thus, it is possible to provide an inexpensive drilling tool with good assemblability.

  Furthermore, according to the present invention, the dust collection case is detachable from the drilling tool, and the dust collection case is held on the diagonal line of the dust collection case to the drilling tool. The center of gravity of the case will be located. Therefore, when the drilling tool vibrates during drilling, the dust collecting case rarely vibrates. Therefore, it is possible to suppress the dust collection case from vibrating and dust from coming out of the dust collection case. Further, it is possible to provide a drilling tool in which the dust collecting case is less likely to come off unexpectedly due to vibration.

  In the present embodiment, power feeding is performed by the electric cord 5, but even if power feeding is performed by a storage battery, the same effects as those of the present invention can be obtained.

  In the present embodiment, the cylindrical member 31c is fixed to the gear housing 1 and the dust collecting housing 8, but may be configured to be removable from the gear housing 1 and the dust collecting housing 8. Alternatively, the same effect can be obtained by either a configuration in which the gear housing 1 is fixed only to the dust housing 8 or a configuration in which the gear housing 1 is removable.

  In this embodiment, the second slider 31b slides inside the cylindrical member 31c, and the first slider 31a slides inside the second slider 31b, but slides in multiple stages. If so, the second slider 31b and the first slider 31a do not slide inside, and for example, the same effect can be obtained when they are provided outside in parallel and slide.

  In the present embodiment, the first opening portion 12c and the second opening portion 12d of the dust collection case 12 are both located above the dust collection case 12. Even if the first opening 21c and the second opening are provided on the side of the dust case 12, the same effect can be obtained.

  In the present embodiment, the dust collection hose 11 is provided separately from the support member 31. However, even if the dust collection hose 11 is provided inside the support member 31, the same effect can be obtained.

  Further, in this embodiment, the engagement of the dust collection case latch 12b with the recess 16a of the tail cover and the engagement of the projection 12a of the dust collection case 12 with the recess 8d of the dust collection housing. The dust collecting case 12 is configured to be held by the hammer drill, but the same effect can be obtained regardless of the type of engaging portion provided that the engaging portion is on a substantially diagonal line of the dust collecting case. It is what you play.

  Further, in this embodiment, the support member is constituted by a cylindrical member. However, the cylindrical shape is not only a cylinder, but the cross-section of the cylindrical member is not limited to a triangle, a quadrangle, a keyhole shape, or other shapes. If they are substantially the same, the same effect can be obtained.

Sectional drawing which shows the principal part which shows one Embodiment of this invention Sectional drawing which shows the principal part which shows one Embodiment of this invention Sectional drawing which shows the principal part which shows other embodiment of this invention. Sectional drawing which shows the seal part of this invention AA sectional view of FIG. BB sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gear housing 2 Motor housing 3 Handle 4 Tip tool holding part 5 Electric cord 6 Switching member 8 Dust collection housing 10 Dust collection adapter 11 Dust collection hose 12 Dust collection case 13 Filter 14 Dust collection fan 15 Air passage 16 Tail cover 17 Cooling Fan 18 Motor 19 Rotating shaft 20 Seal part 21 Dust storage part 26 Tip tool 31 Support part 32 Spring 33 Knob

Claims (2)

A tip tool,
A motor,
A rotation transmission mechanism for transmitting the rotational force of the motor to the tip tool;
A drilling tool having a dust collecting case for storing dust generated by drilling by the rotational movement of the tip tool,
The dust collection case is detachable from the drilling tool, and has at least two holding portions for holding the drilling tool and the dust collection case,
The said holding | maintenance part is provided on the substantially diagonal of the said dust collection case, The drilling tool characterized by the above-mentioned.   2. The drilling tool according to claim 1, wherein an axial extension line of the motor is orthogonal to an axial direction of the tip tool, and the support member is disposed between the tip tool and the motor.

Images