JP2014140909A - Electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric tool in which a holding structure, which is formed by being extended from a motor housing towards an output side gear case, can be stably disposed near the output side gear case without use of a bearing member such as a screw stop or the like.SOLUTION: A gear case 140 is slid relatively to a motor housing 120 from a front side to a rear side. During sliding, gripping parts 97, 98 on both of left and right sides are brought into slide contact with end edges 931, 941 on both of left and right sides, whereby both the gripping parts 97, 98 are disposed with respect to both the end edges 931, 941. Both the gripping parts 97, 98 with respect to both the end edges 931, 941 support a left unit storage holding part 851 and a right unit storage holding part 852 which are in an integration state. The gripping parts 97, 98 of the gear case 140 maintain the integration state of the left unit storage holding part 851 and the right unit storage holding part 852.

Description

  The present invention relates to an electric tool in which a motor is incorporated as a drive source.

For example, an electric power tool in which a motor is incorporated as a drive source, such as an impact driver, is known. In this type of electric tool, the motor is housed in a motor housing that forms the exterior. The motor housing is integrated so that the resin molded members that are divided in half are combined. Here, the combined state of the motor housing is held by screwing. In the screwing of the resin-made molded members that are divided in half, the screws are arranged along the facing direction of the half-shaped molded members that are joined together and screwed together. That is, the screwing of the motor housing is screwed by arranging the screws along the direction orthogonal to the length direction of the motor housing.
On the other hand, a power transmission mechanism that converts an operation mode of rotational drive may be provided in the front portion of the electric tool described above. Examples of the power transmission mechanism include a hammer mechanism that operates and converts to a rotational drive to which a striking force is applied, and a speed reduction mechanism that converts the rotational drive to an improved torque. The power transmission mechanism is attached to the motor housing so as to extend from the front end of the motor housing to the front side.
On the other hand, in the above-described electric power tool, a lighting device may be provided to illuminate the construction object. This type of lighting device includes a lighting member such as an LED (light emitting diode) configured to be lit. Since such a lighting device illuminates the construction control, it is desirable to arrange it under the power transmission mechanism described above.

Japanese Utility Model Publication No. 7-007876

  Incidentally, the holding structure for holding the lighting device is preferably formed in a part of the motor housing from the viewpoint of assembling the lighting device. Moreover, in the lighting device described above, it is desirable that the lighting device is arranged as close to the front end of the electric tool as possible because of the ease of illuminating the construction control. From this point of view, the holding structure for holding this type of lighting device must be formed so that a part of the front end of the motor housing extends to the lower portion of the power transmission mechanism described above.

  From the above viewpoint, the holding structure for holding the lighting device should be formed so that a part of the front end of the motor housing extends to the vicinity of the front end side of the lower part of the power transmission mechanism. However, since the motor housing is formed by combining the resin molded members that are divided in half, the resin molded members that are divided in half are combined in the portion thus extended. It is easy to lose the screwing force. Then, the holding structure provided in this way may be disposed away from the outer periphery of the power transmission mechanism, and this is to be solved. If the size near the front end of the power tool is increased using a support member such as a screw, the ease of handling during construction work as the power tool is impaired. For this reason, it is desirable to prevent the holding structure from being disposed away from the outer periphery of the power transmission mechanism without using a support member such as a screw.

  The present invention has been made in view of such circumstances, and the problem to be solved by the present invention is to extend from a motor housing toward a gear case on the output side in an electric tool in which a motor is incorporated as a drive source. The holding structure formed by this is to be stably arranged near the gear case on the output side without using a support member such as a screw.

In solving the above-described problems, the power tool according to the present invention takes the following means.
That is, the power tool according to the first aspect of the present invention is a power transmission mechanism in which a motor, a housing formed by combining a half-molded part and housing the motor, and a rotational driving force of the motor are transmitted. And a power case that is disposed on the motor output side of the housing, and an output drive unit that protrudes to the outside of the output side from the gear case and outputs a rotational driving force via the power transmission mechanism. And the said gear case is inserted | pinched in the direction which unites the said half-molded parts, and supports the united state of these united molded parts.
According to the electric tool according to the first aspect of the invention, the gear case sandwiches the half-molded parts in the direction in which the half-molded parts are united to support the united half-molded parts. The separation between the half-shaped molded members at the sandwiched portion can be regulated without using a support member such as a screw stopper by the support force of. Further, since the gear case is sandwiched in the direction in which the half-molded parts are joined together and supports the joined state of the joined half-molded parts, the gear case is stably placed near the gear case by the sandwiching support force of the sandwiched portion. be able to.

According to a second aspect of the present invention, there is provided a power tool including a motor and a housing formed by combining a half-molded part and housing the motor, a gear to which a rotational driving force of the motor is transmitted, and the An electric tool comprising: a gear case disposed on a motor output side of a housing; and a rotating shaft that protrudes to the outside of the output side from the gear case and rotates by a rotational driving force via the power transmission mechanism. Accommodates the lighting device that illuminates the outside of the output side in a direction in which the half-molded parts are united together, and the gear case houses the lighting device among the combined half-molded parts. At least a part of the united state of the part is sandwiched in the direction in which the half-molded parts are united with each other to accommodate the lighting device. The body state support, characterized in that.
According to a third aspect of the present invention, there is provided a power tool that includes a motor, a housing that is formed by combining a half-molded component and that houses the motor, a gear that transmits the rotational driving force of the motor, and the An electric tool comprising: a gear case disposed on a motor output side of a housing; and a rotating shaft that protrudes to the outside of the output side from the gear case and rotates by a rotational driving force via the power transmission mechanism. Accommodates the lighting device that illuminates the outside of the output side in a direction in which the half-molded parts are united together, and the gear case houses the lighting device among the combined half-molded parts. The location where the lighting device is accommodated by sandwiching at least a part of the combined state of the locations in the direction in which the half-formed parts are united Brought close towards Yakesu, characterized in that.
According to a fourth aspect of the present invention, there is provided the electric power tool according to any one of the first to third aspects, wherein the electric power tool is extended from the housing toward the output side and receives and holds the lighting device. The portion extends from the housing to the outer peripheral range of the gear case toward the output-side tip of the gear case.

It is an external appearance perspective view which shows the external appearance of the upper right perspective view of an impact driver. It is a right view which shows the side view appearance of the right side of an impact driver. It is a top view which shows the upper surface appearance of an impact driver. It is a front view which shows the front view external appearance of an impact driver. It is a rear view which shows the rear view external appearance of an impact driver. It is an external appearance perspective view which shows the external appearance of the impact driver which removed the cover. It is sectional drawing which shows the cross section of the impact driver divided into right and left. FIG. 8 is an enlarged view illustrating the motor driving unit in the cross-sectional view of FIG. 7. It is an enlarged view which expands and shows a drive conversion mechanism part among sectional drawings of FIG. It is sectional drawing which shows the (X)-(X) cross-section arrow of FIG. It is a perspective view which removes a gear case and shows an LED irradiation apparatus as a perspective view. It is sectional drawing which shows the (XII)-(XII) cross-section arrow of FIG. It is an expanded sectional view which expands and shows the round-out (XIII) part in FIG. It is sectional drawing which shows the 1st modification of FIG. It is sectional drawing which shows the 2nd modification of FIG.

Hereinafter, the form for implementing the electric tool concerning the present invention is explained. The impact driver 10 shown in FIGS. 1 to 9 corresponds to the power tool according to the present invention. The impact driver 10 corresponds to an electric rotary tool according to the present invention, and further corresponds to an electric impact tool (impact tool) according to the present invention. 1 to 5 show the appearance of the impact driver 10. Specifically, FIG. 1 shows an upper right perspective view of the impact driver 10. FIG. 2 shows the right side appearance of the impact driver 10. FIG. 3 shows an external view of the impact driver 10 when viewed from above. FIG. 4 shows the front view appearance of the impact driver 10. FIG. 5 shows a rear view appearance of the impact driver 10. FIG. 6 shows an appearance of the impact driver 10 shown in FIG. 1 with the cover 15 removed. FIG. 7 shows a cross section of the impact driver 10 along the left and right halves when showing the internal structure of the impact driver 10. FIG. 8 is an enlarged view showing the motor driving unit 13 in the sectional view of FIG. FIG. 9 is an enlarged view showing the drive conversion mechanism 14 in the cross-sectional view of FIG. FIG. 10 shows an (X)-(X) section arrow view of FIG. 2 in showing the internal structure of the impact driver 10.
In the following description, the front / rear, up / down, left / right directions of the impact driver 10 are defined in the directions as shown in all the drawings. Specifically, the direction toward the workpiece of the impact driver 10 is defined as the front side that is the output side of the impact driver 10. Further, in view of such a normal usage mode of the impact driver 10, the vertical and horizontal orientations are defined for the impact driver 10 in a state where the user normally grips the pistol as if holding the pistol.

As shown in FIGS. 1 to 6, the impact driver 10 roughly includes a tool body 11, an electric cord 18, and a hooking hook 19. The tool body 11 generally includes a drive structure 12 and a grip 16. The drive structure 12 and the grip 16 are arranged such that the tool body 11 has a configuration simulating a pistol. As shown in FIG. 7, the drive structure 12 roughly includes a motor drive unit 13 and a drive conversion mechanism unit 14. The motor drive unit 13 is provided with an electric motor 21 serving as a drive source so as to generate a rotational drive force. The grip 16 corresponds to the handle according to the present invention. The drive conversion mechanism unit 14 corresponds to the drive conversion mechanism according to the present invention. The electric motor 21 also corresponds to the motor according to the present invention.
The electric motor 21 generates driving force by converting electric power into rotational driving force. The electric power to be converted into the driving force is supplied from an AC power source (AC power source) such as a household power source via the electric cord 18. As will be described later, the electric cord 18 is provided so as to extend from the lower end of the grip end portion 60 to the outside. As described above, the impact driver 10 functions as an electric tool by converting the electric power supplied from the AC power source into the rotational driving force by the electric motor 21.

Specifically, the motor drive unit 13 generally includes a housing 20, an electric motor 21, and a cooling fan 29. The housing 20 constituting the motor drive unit 13 has an outer shape of the tool body 11 excluding the drive conversion mechanism unit 14. That is, the housing 20 is configured to have a housing structure in which the electric motor 21 and the cooling fan 29 can be housed, and a grip structure for the grip 16 described later. For this reason, the housing 20 includes a motor housing 120 that forms the housing of the motor drive unit 13 and a grip housing 160 that forms a grip structure of the grip 16. The housing 20 is a molded product of a resin with a left and right halved structure. As shown in FIG. 1 and the like, the housing 20 is formed by combining housing parts divided into a left housing 201 and a right housing 202 on the right and left sides. Therefore, each of the motor housing 120 and the grip housing 160 is also configured by combining the left housing 201 and the right housing 202 which are divided into left and right parts. The motor housing 120 and the grip housing 160 have a hollow structure in which appropriate electrical components can be installed. That is, the housing 20 is formed by combining half-molded parts so that the electric motor can be accommodated. The housing 20 corresponds to a combined housing according to the present invention, and the electric motor 21 accommodated corresponds to the motor according to the present invention.
The motor housing 120 has a hollow, substantially bottomed cylindrical structure that extends in the front-rear direction. As shown in FIG. 7, the motor housing 120 includes an electric motor 21 and a cooling fan 29. The motor housing 120 is provided with vent holes 121 and 122 for sucking and exhausting motor cooling air into and out of the motor housing 120 by a cooling fan 29. That is, the intake-side vent 121 is a vent that sucks outside air into the motor housing 120 by the cooling fan 29. The exhaust-side vent 122 is a vent that exhausts the motor cooling air to the outside of the motor housing 120 by the cooling fan 29.

The electric motor 21 is a so-called brush motor. Specifically, the electric motor 21 generally includes a motor shaft 22, a rotor 23, a commutator (commutator) 24, a brush 25, and a stator 26. The motor shaft 22 is rotatably supported by a rear bearing 56 disposed at the rear end position of the electric motor 21 and a front bearing 55 disposed at the front end position of the electric motor 21. As will be described later, the front bearing 55 is housed in the bearing box 51 supported by the gear case 140. The rear bearing 56 is fixed to the motor housing 120 in the same manner as the stator 26 described below. A rotor 23 is disposed on the outer periphery of the motor shaft 22. The rotor 23 has a plurality of teeth 231 on which a conductive wire is appropriately wound. The rotor 23 is rotated by being supported by the motor shaft 22 with the motor shaft 22 as a rotation axis. For this reason, the rotor 23 rotates integrally with the motor shaft 22 while being supported by the motor shaft 22. The rotation of the rotor 23 is relative to the stator 26 described later. Moreover, the commutator 24 is provided in the rear part of the rotor 23 similarly to a normal brush motor. Further, a brush 25 that is in contact with the commutator 24 is disposed at a vertical position on the outer peripheral side of the commutator 24.
A stator 26 is provided around the rotor 23 described above. The stator 26 is fixed to the motor housing 120 similarly to the bearings 55 and 56 described above. The stator 26 functions as an electromagnet that generates a magnetic flux necessary for the rotation of the rotor 23, like a stator of a normal brush motor. The stator 26 includes a stator core 27 and a field coil 28. The stator core 27 corresponds to the iron core according to the present invention. The stator core 27 is excited by a field coil 28 described below to generate a magnetic flux in the same manner as a normal field core. The stator core 27 is fixed to the motor housing 120. Thus, the electric motor 21 rotates the rotor 23 arranged on the inner peripheral side of the stator core 27 relative to the stator core 27.

Incidentally, as shown in FIG. 8, an upper outer peripheral plane 271 that is chamfered in a planar shape is provided on the top of the stator core 27. Similarly, a lower outer peripheral plane 272 that is chamfered in a planar shape is provided at the lower portion of the stator core 27. The stator core 27 is restrained from being bulky in the vertical direction by the upper outer peripheral plane 271 and the lower outer peripheral plane 272. A first projecting contact portion 123 projecting sideways is provided on the inner peripheral surface of the motor housing 120 facing the upper outer peripheral flat surface 271 side. The first protruding contact portion 123 is formed with a flat surface extending in the front-rear and left-right directions. The first projecting contact portion 123 acts to abut and support the upper outer peripheral flat surface 271 with a surface. Further, a second projecting contact portion 124 projecting sideways is also provided on the inner peripheral surface of the motor housing 120 facing the lower outer peripheral flat surface 272 side. The second protruding contact portion 124 is also formed with a flat surface extending in the front-rear and left-right directions. The second protruding contact portion 124 also acts to support and support the lower outer peripheral flat surface 272 with a surface. In this way, the first protruding contact portion 123 and the second protruding contact portion 124 act to prevent the stator core 27 from rotating with respect to the motor housing 120.
The field coil 28 corresponds to a coil according to the present invention. The field coil 28 excites the stator core 27 in the same manner as a normal field coil. The field coil 28 is disposed on the inner peripheral side of the stator core 27 and is fixed to the motor housing 120. The field coil 28 is formed by winding a conductive wire, and is fixed so as to be integrated with the stator core 27. The field coil 28 arranged in this manner excites the stator core 27 by generating a magnetic field by the electric power supplied from the AC power source, like a normal field coil.

The field coil 28 is configured by winding a conducting wire. Here, the field coil 28 excites the stator core 27 so that magnetic poles are formed at the upper and lower positions. That is, the field coils 28 are distributed and arranged so that magnetic poles are formed at the upper and lower positions. Specifically, the field coil 28 is arranged so that magnetic poles are formed with respect to the upper outer peripheral plane 271 and the lower outer peripheral plane 272 of the stator core 27.
Here, the winding range of the field coil 28 is set so as to cover the range protruding outward from both the front and rear sides of the stator core 27. As shown in FIG. 8, the front end portion of the field coil 28 disposed on the front side of the stator core 27 extends as a front projecting coil portion 281 to a range protruding outward from the front side of the stator core 27. Is set. The front protruding coil portion 281 protrudes forward of the stator core 27 and protrudes further outward in the rotational radial direction than the stator core 27. Further, the rear end portion of the field coil 28 arranged on the rear side of the stator core 27 is also set as the rear projecting coil portion 282 so as to cover a range protruding outward from the rear side of the stator core 27. Has been. The rear protruding coil portion 282 protrudes to the rear side of the stator core 27, and further protrudes to the outer side in the rotational radial direction of the stator core 27. Here, the rear protruding coil portion 282 is formed larger than the front protruding coil portion 281. That is, the amount of protrusion of the rear protruding coil portion 282 outward from the stator core 27 is set to be larger than the amount of protrusion of the front protruding coil portion 281 outward from the stator core 27.
Here, a cooling fan 29 is attached to the front end of the motor shaft 22 of the electric motor 21. The cooling fan 29 is composed of a sirocco fan (centrifugal fan). The cooling fan 29 sucks air from the axial direction of the motor shaft 22 and exhausts it in the centrifugal direction of the motor shaft 22. As a result, the cooling fan 29 draws outside air as cooling air into the housing 20 from the intake-side vent 121 and exhausts the cooled cooling air from the exhaust-side vent 122. At this time, the cooling air flows from the rear part of the housing 20 toward the front part, and at this time, the electric motor 21 is heat-exchanged. The exhaust vent 122 is provided at a position along the exhaust of the cooling fan 29 with respect to the housing 20.

By the way, the left housing 201 and the right housing 202, which are divided into left and right parts, are held in a combined state by nine screwing. That is, in the motor housing 120, the combined state of the left housing 201 and the right housing 202 is maintained by screwing of six points. As will be described in detail later, the left housing 201 is connected to the gear case 140 via male screws 710 and 720 by an upper left screwing portion 71 and a lower left screwing portion 72. The right housing 202 is connected to the gear case 140 via male screws 730 and 740 with an upper right screw fixing portion 73 and a lower right screw fixing portion 74.
The arrangement setting of the six points screwed in the motor housing 120 is as follows. That is, the rear part of the motor housing 120 is screwed by using male screws 410 and 420 at two points of the rear screwing parts 41 and 42. The rear screwing portions 41 and 42 are provided with respect to the motor housing 120 in the vicinity that supports the rear bearing 56. The rear screwing portions 41 and 42 are arranged at positions that are symmetric with respect to the rotational axis of the motor shaft 22 as the central axis. Further, the front portion of the motor housing 120 is screwed using male screws 430 and 440 at two points of the front screwing portions 43 and 44. The front screwing portions 43 and 44 are provided with respect to the motor housing 120 in the vicinity that supports the front bearing 55. The front screwing portions 43 and 44 are also arranged at positions symmetrical to each other with the rotation axis of the motor shaft 22 as the central axis.
Further, the intermediate portion of the motor housing 120 is screwed by using male screws 450 and 460 at two points of the intermediate screw fixing portions 45 and 46. The two intermediate screwing portions 45 and 46 are disposed between the front protruding coil portion 281 and the rear protruding coil portion 282 described above. That is, the two intermediate screw fixing portions 45 and 46 are disposed on the outer peripheral side of the stator core 27 described above.

Specifically, the first intermediate screwing portion 45 is disposed on the upper side of the stator core 27. The first intermediate portion screwing portion 45 is disposed so as to face the upper outer peripheral plane 271 of the chamfered stator core 27. More specifically, the first intermediate screwing portion 45 is disposed on the upper side of the first protruding contact portion 123 described above. The position of the first intermediate screwing portion 45 in the front-rear direction with respect to the stator core 27 is arranged at a substantially intermediate position of the stator core 27. The first intermediate screw fixing portion 45 is disposed on the upper side appropriately separated from the first protruding contact portion 123. For this reason, an appropriate space portion is interposed between the first protruding contact portion 123 and the first intermediate portion screwing portion 45.
Further, a second intermediate screwing portion 46 is disposed below the stator core 27. The second intermediate screwing portion 46 is disposed to face the lower outer peripheral plane 272 of the chamfered stator core 27. More specifically, the second intermediate screwing portion 46 is disposed below the second protruding contact portion 124 described above. The position of the second intermediate screwing portion 46 in the front-rear direction with respect to the stator core 27 is biased toward the rear end side of the stator core 27. The rear end of the grip end 60 is disposed at substantially the same position as the position in the front-rear direction. That is, these two intermediate screw fixing portions 45 and 46 are arranged on the rear side of the front protruding coil portion 281. At the same time, the two intermediate screw fixing portions 45 and 46 are disposed in front of the rear protruding coil portion 282. The second intermediate screwing portion 46 is disposed on the lower side appropriately separated from the second protruding contact portion 124. For this reason, an appropriate space portion is interposed between the second projecting contact portion 124 and the second intermediate screwing portion 46.

In the grip housing 160, the combined state of the left housing 201 and the right housing 202 is maintained by screwing at three points. The arrangement setting of the three points screwed in the grip housing 160 is as follows. That is, the upper screwing portion 47 is disposed near the operation trigger 77 in the grip 16 that is gripped by the user. The upper screwing portion 47 is screwed using a male screw 470. The intermediate screwing portion 48 is disposed on the grip end portion 60. The intermediate screwing portion 48 is screwed using a male screw 480. The lower screwing portion 49 is disposed below the grip end portion 60. The lower screwing portion 49 is screwed using a male screw 490.
In addition, the arrangement | positioning of the male screws 410-490 in each above-mentioned screwing | fastening part 41-49 is arrange | positioned along the direction which unites the left housing 201 and the right housing 202. FIG. In this manner, the motor housing 120 is screw-fixed by the six points of the rear screwing portions 41 and 42, the front screwing portions 43 and 44, and the intermediate screwing portions 45 and 46. Further, the grip housing 160 is screw-fixed by three points of an upper screw fixing portion 47, an intermediate screw fixing portion 48 and a lower screw fixing portion 49. Accordingly, the left housing 201 and the right housing 202 are combined to form the housing 20.
As shown in FIG. 9, the drive conversion mechanism unit 14 includes a mechanism that converts the rotational driving force of the motor shaft 22 of the electric motor 21. Specifically, the drive conversion mechanism unit 14 roughly includes a gear case 140 and a power transmission mechanism unit 31. The gear case 140 forms an exterior of the drive conversion mechanism unit 14. The gear case 140 is disposed on the front side of the motor housing 120 that is the motor output side of the motor housing 120. The gear case 140 is made of metal having excellent rigidity. Inside the gear case 140, a power transmission mechanism 31 is housed. The power transmission mechanism 31 corresponds to the power transmission mechanism according to the present invention, and is configured to have a gear to which the rotational driving force of the electric motor 21 is transmitted. The gear case 140 is integrated with the housing 20 on the front side of the motor housing 120. Further, from the front end of the gear case 140, an anvil 37 serving as an output shaft from the power transmission mechanism portion 31 protrudes toward the front side. The gear case 140 corresponds to a front case according to the present invention and also corresponds to a hammer case according to the present invention. The drive output shaft 39 including the anvil 37 and a hitting piece (to be described later) corresponds to the output shaft according to the present invention. The drive output shaft 39 corresponds to an output drive unit that outputs a rotational drive force according to the present invention and a rotary shaft that rotates by the rotational drive force according to the present invention. That is, the drive output shaft 39 protrudes from the gear case 140 to the outside on the output side, and rotates and outputs the rotational driving force via the power transmission mechanism 31.

As can be seen by comparing FIG. 1 and FIG. 6, a resin cover 15 is attached to the outer peripheral surface of the gear case 140. The cover 15 is disposed so as to cover the outer peripheral surface 141 of the gear case 140 and prevents the gear case 140 from being exposed to the outside. That is, as shown in FIG. 6, the cover 15 is provided over a range covering the outer peripheral surface 141 of the gear case 140 and also provided over a range covering an externally exposed portion 511 of the bearing box 51 described later. Yes. When the cover 15 is removed, the screw fastening portions 71, 72, 73, 74 (not visible at the blind spot shown) of the gear case 140 are exposed to the outside. Male screws 710, 720, 730, and 740 (not visible at the blind spot in the drawing) are arranged on these screw fastening portions 71, 72, 73, and 74. Note that a notch 142 for screwing is provided on the outer peripheral surface 141 of the gear case 140 on the front side of these screwing portions 71, 72, 73, 74. This screwing notch groove 142 secures a space for the screwdriver to be screwed when the male screws 710, 720, 730, 740 are screwed to the screwing portions 71, 72, 73, 74. .
The resin cover 15 is provided with a shape that matches the protruding shape of the screw fastening portions 71, 72, 73, 74 of the gear case 140. Specifically, the screwing portions 71, 72, 73, and 74 are provided so as to protrude in the rotational radial direction of the anvil 37. Therefore, as shown in FIG. 1, the resin cover 15 has a bulge shape 151 that covers the screw stoppers 71, 72, 73, and 74 that are protruded in this manner. Here, the front surface 152 of the bulging shape 151 of the resin cover 15 is formed by a plane extending in the up, down, left, and right directions that can face the processing material. As a result, even when such a bulging shape 151 is applied to a work material, for example, the impact can be efficiently absorbed by the front surface 152 to protect the screw stoppers 71, 72, 73, 74. It will be advantageous.

  The power transmission mechanism 31 built in the gear case 140 receives a rotational driving force from the electric motor 21. The power transmission mechanism 31 that has received the rotational driving force transmits the rotational driving force to the anvil 37 protruding forward from the front end of the gear case 140 by transmitting power. That is, the power transmission mechanism 31 includes a planetary gear mechanism 32, a striking mechanism 33, and an anvil 37. The planetary gear mechanism 32 is configured by a gear train that reduces the rotational drive of the electric motor 21. The planetary gear mechanism 32 is configured by incorporating a planetary gear train 321 in an internal gear 320. The striking mechanism 33 includes an intermediate shaft 34, an urging spring 35, and a hammer 36. The intermediate shaft 34 is rotatably supported by an intermediate shaft bearing 57. The intermediate shaft 34 rotates upon receiving the rotational drive transmitted through the planetary gear mechanism 32. The urging spring 35 urges the hammer 36 toward the front side. The hammer 36 strikes a striking piece 38 that is integrated with the anvil 37. The anvil 37 is configured to have a chuck mechanism to which a screwdriver screw B for screwing can be attached. The driver bit B corresponds to the tip tool according to the present invention. When the hitting mechanism 33 configured in this manner receives an external torque (screw tightening resistance) equal to or higher than the set torque on the anvil 37 via the driver bit B during the screw tightening rotation, the hammer 36 moves against the intermediate shaft 34. It rotates forward and backward in the axial direction. Then, the hammer 36 strikes the striking piece 38 in the rotation direction, and outputs a large screw tightening torque to the anvil 37 integrated with the striking piece 38.

Incidentally, a bearing box 51 is disposed at the rear of the drive conversion mechanism section 14 described above. The bearing box 51 is provided so as to be connected to the rear portion of the gear case 140. That is, the bearing box 51 includes a support case 52, a front bearing 55, and an intermediate shaft bearing 57. The support case 52 generally includes a support extension portion 53 and a bearing holding portion 54. The support extension portion 53 is sandwiched and supported by the internal gear 320 of the planetary gear mechanism 32 and the gear case 140 of the drive conversion mechanism portion 14 described above. That is, the support projecting portion 53 is disposed on the inner peripheral side of the gear case 140 while being disposed on the outer peripheral side of the internal gear 320, and is supported so as to be sandwiched between the both. An O-ring 541 is engaged between the support projecting portion 53 and the gear case 140.
The bearing holding portion 54 is provided integrally with the support protrusion portion 53 so as to protrude rearward from the above-described support protrusion portion 53. For this reason, the bearing holding part 54 protrudes from the rear part of the gear case 140 to the rear side in a state where the support projecting part 53 is supported by the gear case 140. The bearing holding portion 54 holds the front bearing 55 and the intermediate shaft bearing 57 described above. Specifically, a first support recess 531 into which the front bearing 55 can be fitted is provided on the rear side of the bearing holding portion 54 so that the front bearing 55 can be supported. The front bearing 55 is supported by the first support recess 531 and supports the motor shaft 22 described above. Note that an O-ring 542 is engaged between the first support recess 531 and the front bearing 55. Further, a second support recess 532 into which the intermediate shaft bearing 57 can be fitted is provided on the front side of the bearing holding portion 54 so that the intermediate shaft bearing 57 can be supported. The second support recess 532 is disposed adjacent to the front side of the first support recess 531 described above. The intermediate shaft bearing 57 is supported by the second support recess 532 and supports the intermediate shaft 34 described above. The outer peripheral surface of the bearing box 51 is provided with an external exposed portion 511 that is exposed to the outside on the rear side of the gear case 140 together with the outer peripheral surface of the gear case 140.

As shown in FIG. 6, the left housing 201 and the right housing 202 are screwed to the gear case 140. That is, the left housing 201 is screwed to the gear case 140 by the upper left screwing portion 71 and the lower left screwing portion 72 that are spaced apart from each other in the vertical direction. The upper left screwing portion 71 and the lower left screwing portion 72 are formed by disposing male screws 710 and 720 along the extending direction of the gear case 140 and screwing the left housing 201 and the gear case 140 together. That is, the upper left screwing portion 71 and the lower left screwing portion 72 connect the gear case 140 and the motor housing 120 by the male screws 710 and 720. Therefore, the motor housing 120 is provided with female screw portions 711 and 721 for screwing the male screws 710 and 720 as shown in FIG.
Similarly, the right housing 202 is also screwed to the gear case 140 by an upper right screwing portion 73 and a lower right screwing portion 74 that are spaced apart from each other in the vertical direction. The upper right screwing portion 73 and the lower right screwing portion 74 are formed by disposing male screws 730 and 740 along the extending direction of the gear case 140 and screwing the right housing 202 and the gear case 140 together. That is, the upper right screwing portion 73 and the lower right screwing portion 74 connect the gear case 140 and the motor housing 120 by the male screws 730 and 740. Therefore, the motor housing 120 is provided with female screw portions 731 and 741 for screwing the male screws 730 and 740 as shown in FIG.

As shown in FIG. 10, the two male screws 430 and 440 arranged at the two front screw fastening portions 43 and 44 correspond to the first combined screw and the second combined screw according to the present invention. That is, the first front screwing portion 43 corresponding to the first combined screw is set to be disposed above the position where the bearing box 51 is disposed. The first front screwing portion 43 is set to be disposed below the arrangement position of the upper left screwing portion 71 (male screw 710) and the upper right screwing portion 73 (male screw 730). It should be noted that the male screw 430 of the first front screwing portion 43 screw-fastens the female screw 431 of the left housing 201 and the female screw 432 of the right housing 202.
On the other hand, the second front screwing portion 44 corresponding to the second combined screw is set to be disposed below the position where the bearing box 51 is disposed. The second front screwing portion 44 is set to be arranged above the arrangement position of the lower left screwing portion 72 (male screw 720) and the lower right screwing portion 74 (male screw 740). It should be noted that the male screw 440 of the second front screwing portion 44 fastens the female screw 441 of the right housing 202 and the female screw 442 of the right housing 202 to each other.
Thus, as shown in FIGS. 8 and 9, the buffer space 50 is provided on the rear side of the bearing box 51 and on the outer peripheral side of the two front screw fastening portions 43 and 44. ing. The buffer space 50 has an effect of buffering the vibration transmitted through the space when the vibration generated in the power transmission mechanism 31 is transmitted to the grip 16. That is, even when the user holds the impact driver 10 with the grip 16, the vibration transmitted to the grip 16 can be buffered, and the ease of handling as the impact driver 10 is improved.

  Incidentally, a grip 16 is provided on the lower side of the drive structure 12 described above. The grip 16 is formed by a grip housing 160 that is formed integrally with the motor housing 120. The grip housing 160 is also referred to as a handle housing, and is formed to imitate a pistol grip that can be gripped by a user. Specifically, the grip housing 160 is formed so as to extend further downward from the lower portion of the motor housing 120. A grip end portion 60 that is inflated like a grip end of a baseball bat is provided below the grip 16. The grip end portion 60 is formed as a part of the grip housing 160 so as to constitute a lower portion of the grip housing 160. The grip end portion 60 has a substantially box shape so that the area of the front and rear left and right cross sections of the grip end portion 60 is larger than the area of the front and rear left and right cross sections of the grip housing 160 at the grip 16 portion. Is formed. An electric cord 18 extending from the lower portion of the grip end portion 60 to the outside is provided at the lower portion of the grip end portion 60. A reference numeral 181 is a guide member for covering the electric cord 18. A hook 19 for hooking is attached to the left side surface of the grip end portion 60 by screwing 191. The hook 19 can be removed from the tool body 11 by unscrewing the screw stopper 191.

  As shown in FIG. 7, a drive switch 75 is provided on the upper portion of the grip 16. The drive switch 75 generally includes a switch body 76, an operation trigger 77, and a left / right rotation direction switching button 78. The switch body 76 is housed in the grip housing 160 together with the controller 79. The switch body 76 is configured to transmit an input signal to the controller 79 in response to operation inputs from the operation trigger 77 and the left / right rotation direction switching button 78. The controller 79 supplies electric power to the electric motor 21 based on an input signal from the switch body 76 and also taking into account an input signal from a speed mode switch 61 described later. The operation trigger 77 is configured such that the user can perform a pulling operation with a finger while holding the grip 16. Specifically, the operation trigger 77 is provided to be slidable in the front-rear direction with respect to the grip 16. The left / right rotation direction switching button 78 is provided so as to be slidable in the left / right direction with respect to the grip 16. When the left / right rotation direction switching button 78 is pressed from the right side, it performs forward (right rotation) operation input, and is pressed from the left side. The operation input for reverse rotation (left rotation) is performed.

As shown in FIG. 5, a speed mode switch 61 and an LED (light emitting diode) display device 65 are provided on the rear surface of the grip end portion 60 constituting the lower portion of the grip housing 160. The LED display device 65 corresponds to a display unit according to the present invention. The speed mode switch 61 and the LED display device 65 are arranged vertically on the same surface as the rear surface of the grip end portion 60.
The speed mode switch 61 is configured to perform an operation input according to the user's arbitrary. This operation input is an input for switching the rotation speed mode of the electric motor 21. That is, the speed mode switch 61 is configured to be switchable between two stages of a low speed mode and a high speed mode. The low speed mode is a mode in which the rotation speed is set to a low speed, and the high speed mode is a mode in which the rotation speed is set to a high speed. As shown in FIG. 7, the speed mode switch 61 includes a mode switch main body 62 and an operation unit 63. The mode switch main body 62 is disposed inside the grip end portion 60 and transmits information related to input according to the input of the operation portion 63 to the controller 79. The operation part 63 is provided facing the rear surface of the grip end part 60. The operation unit 63 can be switched to either the low speed mode or the high speed mode by sliding in the left-right direction.

  Specifically, an opening 64 is formed on the rear surface of the grip end portion 60 by notching a grip housing 160 forming the rear surface. The opening portion 64 exposes the operation portion 63 to the outside so that the operation can be input to the mode switch body 62 through the inside and outside of the grip housing 160. Specifically, the opening 64 is formed by cutting out the rear surface of the grip end 60 in a substantially rectangular shape. The left edge of the opening 64 is engraved with a numeral “1” indicating that the operation input is in the low speed mode. The right edge of the opening 64 is engraved with a numeral “2” indicating that the operation input is in the high speed mode. The operation part 63 exposed to the outside so as to be operable from the opening part 64 is formed to have a shape extending to the upper and lower ridges so that the finger can be hooked and slid in the left-right direction. For this reason, the user can hook the operation unit 63 with a finger and slide it to the left side to place it on the left side, or can hook the operation unit 63 with a finger and slide it to the right side to place it on the right side. . Here, when the operation unit 63 is arranged on the left side of the mark “1”, the operation is input to the mode switch main body 62 so that the electric motor 21 rotates at a low speed. Further, when the operation unit 63 is arranged on the right side of the marking “2”, the operation is input to the mode switch main body 62 so that the electric motor 21 rotates at high speed. The operation input made to the mode switch body 62 transmits an input signal to the controller 79 described above.

The LED display device 65 includes two LED lamps 66 and 67 as shown in FIG. The two LED lamps 66 and 67 are configured to correspond to the speed mode switch 61 that can be switched to the above-described two stages. That is, the two LED lamps 66 and 67 display the two-stage rotation speeds of the low speed and the high speed switched by the speed mode switch 61. The two LED lamps 66 and 67 display in a two-stage speed mode of low speed and high speed by lighting. That is, the two LED lamps 66 and 67 correspond to a plurality of light emitters according to the present invention. The emission colors of the two LED lamps 66 and 67 are set to different emission colors. Specifically, the emission color of the left LED lamp 66 is set to red, and the emission color of the right LED lamp 67 is set to blue. Here, the lighting display of the LED display device 65 is controlled by the controller 79 according to the operation input by the speed mode switch 61. That is, when a low-speed operation input is made from the speed mode switch 61 described above, the controller 79 turns on the left LED lamp 66 of the LED display device 65. In addition, when a high-speed operation input is made from the speed mode switch 61 described above, the controller 79 lights the right LED lamp 67 of the LED display device 65.
Here, the two LED lamps 66 and 67 are configured to light up so as to be able to determine whether or not the impact driver 10 is in a power supply state. That is, regardless of whether the operation trigger 77 is pulled or not, when the electric cord 18 is connected to an AC power source, one of the two LED lamps 66 and 67 is always set. It is turned on. When the electrical cord 18 is not connected to an AC power source, neither of the LED lamps 66 and 67 is turned off.

By the way, the above-described lighting of the LED display device 65 may be modified as follows. That is, of the two LED lamps 66 and 67 described above, the left LED lamp 66 emits red light, and the right LED lamp 67 emits blue light. However, the color (light emission color) when the two LED lamps 66 and 67 emit light is not limited to the setting of the light emission colors different from each other, and the light emission colors (the same color) ( (Monochromatic light emission) may be set. Further, the light emission (lighting) of the two LED lamps 66 and 67 described above causes the LED lamps 66 and 67 on the left and right sides to emit light (light on) in response to an operation input from the speed mode switch 61. However, either one of the left and right LED lamps 66 and 67 emits light (lights up) in response to an operation input from the speed mode switch 61, or both the left and right LED lamps in response to an operation input from the speed mode switch 61. Alternatively, both sides of 66 and 67 may emit light (light on).
In such a case, the brightness (luminance) when the LED lamps 66 and 67 emit light may be changed. That is, when the rotational speed of the electric motor 21 changes stepwise according to the operation input from the speed mode switch 61, one or both of the LED lamps 66 and 67 are changed according to the step change. The brightness (luminance) of light emission may be changed stepwise. In addition, the number of light emitted by the LED lamps 66 and 67 may be changed in accordance with the rotational speed of the electric motor 21 in a stepwise manner. In addition, the color emitted from the LED lamps 66 and 67 may be changed stepwise according to the stepwise change in the rotation speed of the electric motor 21. In addition, according to the stepwise change in the rotational speed of the electric motor 21, the colors emitted by the LED lamps 66 and 67 are set to different colors or combined and changed. Good. That is, for the lighting control of the LED display device 65, an appropriate display mode that can be visually recognized can be selected, and various display modes that have been used in the past are used for such a display mode. It may be.

Even when the LED lamps 66 and 67 emit light as described above, the LED lamps 66 and 67 are configured to be lit so that it can be determined whether or not the impact driver 10 is in a power supply state. ing. That is, when the electric cord 18 is not connected to the AC power source, both of the LED lamps 66 and 67 are turned off and are not turned on at all. On the other hand, the operation trigger 77 is pulled. When the electric cord 18 is connected to an AC power source regardless of whether it is operated or not, at least one of the two LED lamps 66 and 67 described above can be recognized by the user. It lights up as appropriate. Further, the above LED display device 65 is turned on (light emission of the LED lamps 66 and 67) under the control of the controller 79. That is, the controller 79 considers the input signal from the drive switch 75, the input signal from the speed mode switch 61, the electrical connection of the AC power supply of the electric cord 18, and the like, and the LED lamps 66, 67 is controlled independently.
By the way, although the speed mode switch 61 and the LED display device 65 described above are separately divided components, the speed mode switch 61 and the LED display device 65 are the same on the circuit board. It may be configured. Further, the LED display device 65 is controlled by a controller 79 which is a separate component from the LED display device 65, but is configured to be directly controlled from the speed mode switch 61. It may be a thing. Further, such a circuit board may be mounted with a capacitor or a diode bridge, and may further be mounted with a capacitor or a diode bridge in the controller 79. Furthermore, a circuit functioning as the controller 79 may be mounted on a circuit board that connects the speed mode switch 61 and the LED display device 65.

  Moreover, the code | symbol 80 shown in FIG. 1 and FIG. 2 is an LED irradiation apparatus. The LED irradiation device 80 corresponds to a lighting device according to the present invention. The LED irradiation device 80 is an irradiation device that illuminates the tip of the driver bit B mounted on the anvil 37 described above. As shown in FIG. 9, the LED irradiation device 80 generally includes an LED main body 81 and a holding body 83 that holds the LED main body 81. The LED main body 81 illuminates the front outside of the impact driver 10 on the output side of the impact driver 10 by being energized and lit. For this reason, the front of the holding body 83 that holds the LED main body 81 is formed to have an opening shape that allows front irradiation. The LED irradiation device 80 configured as described above is housed and held in the device housing / holding portion 85 as shown in FIG. The device housing / holding portion 85 is provided at a front end portion of the motor housing 120 that forms a part of the housing 20. The front end portion of the motor housing 120 provided with the device housing / holding portion 85 corresponds to the output side end portion of the housing according to the present invention. Further, the device housing / holding portion 85 extends so that a part of the motor housing 120 extends over the outer peripheral range of the gear case 140 toward the tip of the driver bit B (anvil 37). The tip of the driver bit B corresponds to the tip of the gear case 140 on the output side.

Specifically, the device housing / holding portion 85 is formed to extend so as to project a part of the motor housing 120 disposed on the front side of the left / right rotation direction switching button 78 to the front side. The device housing / holding portion 85 protruding in this way is disposed close to the lower side of the middle portion of the gear case 140. The device housing / holding portion 85 is formed to extend so as to project a part of the motor housing 120 disposed on the front side of the left / right rotation direction switching button 78 to the front side. The device housing / holding portion 85 protruding in this way is formed by combining the left device housing / holding portion 851 and the right device housing / holding portion 852 that have a symmetrical structure. That is, the left device housing holding portion 851 is formed to protrude from the left housing 201 to the front side and extend. Further, the right device accommodating / holding portion 852 is formed so as to protrude and extend from the right housing 202 to the front side.
FIG. 11 is a perspective view showing the LED irradiation device 80 in a perspective view with the gear case 140 removed. FIG. 12 is a cross-sectional view showing the (XII)-(XII) cross-sectional view of FIG. FIG. 13 is an enlarged cross-sectional view showing an enlarged (XIII) portion in FIG. 11 to 13 are easy to understand the structural relationship between the device housing / holding portion 85 and the gear case 140, which will be described in detail below, the illustration of the structure excluding these structural relationships is omitted. doing.

As shown in FIG. 11, the device housing / holding portion 85 is formed by combining the half-molded parts of the housing 20 constituting the motor housing 120 described above. That is, the housing 20 is formed by combining the left and right molded parts divided by the left housing 201 and the right housing 202. For this reason, even in the device housing / holding portion 85, the left housing 201 and the right housing 202 form a housing space structure that is divided into left and right. That is, each of the left housing 201 and the right housing 202 is provided with a housing recess that is divided in half when the housing space of the device housing holder 85 is formed. As shown in FIGS. 12 and 13, the left housing 201 is provided with a left housing recess 853 that divides the housing space of the device housing holder 85 into half. Further, the right housing 202 is provided with a right accommodation recess 854 that divides the accommodation space of the apparatus accommodation holding portion 85 in half. In this way, by combining the left housing 201 and the right housing 202, which are divided into left and right parts, the left and right receiving recesses 853 and 854 are combined to hold the LED irradiation device 80. It is formed. That is, the LED irradiation device 80 is housed in the device housing holding portion 85 by the sandwiching force between the left housing 201 and the right housing 202 by combining the half-molded parts of the left housing 201 and the right housing 202 together. Being held.
As shown in FIG. 9, the LED irradiation device 80 configured as described above is disposed below the outer peripheral range of the gear case 140. That is, the device housing / holding portion 85 extends from the motor housing 120 so as to be adjacent to the lower side of the outer peripheral range of the gear case 140. Specifically, as shown in FIG. 9, the device housing / holding portion 85 has an outer peripheral range from the motor housing 120 to the gear case 140 such that the irradiation side end is arranged and set at a substantially middle portion in the front-rear direction of the gear case 140. It extends so as to cover the lower side.

Incidentally, as shown in FIG. 11, a connecting flange portion 205 is provided at the front end portion of the left housing 201. The connecting flange portion 205 is provided with an upper left screwing portion 71 and a lower left screwing portion 72. A holding flange portion 207 is provided between the upper left screwing portion 71 and the lower left screwing portion 72 so as to protrude to the front side. The holding flange portion 207 is arranged and set so as to face the left outer peripheral surface of the gear case 140.
Similarly, a connecting flange portion 206 is also provided at the front end portion of the right housing 202. The connecting flange portion 206 is also provided with an upper right screwing portion 73 and a lower right screwing portion 74. Further, a holding flange portion 208 is provided between the upper right screwing portion 73 and the lower right screwing portion 74 so as to protrude to the front side. The holding flange portion 207 is arranged and set so as to face the right outer peripheral surface of the gear case 140.
Further, in the gear case 140, screw insertion holes 146 to 149 are provided corresponding to the screw fixing portions 71 to 74 described above. Specifically, the screw insertion holes 146 to 149 are provided so as to protrude radially outward from the outer peripheral surface 141 of the gear case 140.
These screw insertion holes 146 to 149 are provided at symmetrical positions corresponding to the screw fixing portions 71 to 74 described above. Reference numeral 144 denotes a base end opening that forms the drive source side end of the gear case 140, and illustrated numeral 145 denotes a tip opening that forms the output side end of the gear case 140. That is, the device housing / holding portion 85 is formed so as to protrude toward the front end opening portion 145 of the gear case 140.
In addition, the device housing / holding portion 85 provided in the motor housing 120 is supported by the device housing / holding portion 85 in a combined state by a sandwiching structure 90 described below. That is, the sandwiching structure 90 includes a sandwiched portion 91 provided on the apparatus housing holding portion 85 side and a sandwiching portion 95 provided on the gear case 140 side.

The sandwiched portion 91 is formed so as to protrude upward in the device housing and holding portion 85. Specifically, the sandwiched portion 91 is formed by combining a left sandwiched portion 93 and a right sandwiched portion 94 that form a symmetrical structure. That is, the left sandwiched portion 93 is provided so as to protrude upward from the left device housing holding portion 851. Further, the right sandwiched portion 94 is provided so as to protrude upward from the right device housing holding portion 852. The sandwiched portion 91 formed by combining the left sandwiched portion 93 and the right sandwiched portion 94 is provided with an upper peripheral surface 92 that protrudes upward from the upper surface 86 of the device housing holding portion 85. . The upper peripheral surface 92 is formed to have a curved shape facing the sliding contact surface 99 of the sandwiching portion 95 of the gear case 140.
The upper peripheral surface 92 of the sandwiched portion 91 has a curved shape that protrudes smoothly upward toward the left and right end edges 931 and 941. That is, the left sandwiched portion 93 has a shape that smoothly protrudes upward toward the end edge 931. The right sandwiched portion 94 also has a shape that smoothly protrudes upward toward the end edge 941. Further, the left and right intervals between the left and right end edges 931 and 941 of the sandwiched portion 91 are set to become narrower toward the front end. For this reason, the upward protrusion amount of the sandwiched portion 91 shown in FIG. 11 gradually decreases from the base end toward the front end. That is, the left sandwiched portion 93 is set such that the left front end portion 933 is positioned on the right side (the center side of the sandwiched portion 91) as compared with the left base end portion 932. Thereby, the left base end portion 932 is formed to protrude upward as compared with the left front end portion 933. Further, the right sandwiched portion 94 is set so that the right front end portion 943 is positioned on the left side (center side of the sandwiched portion 91) as compared to the right base end portion 942. Accordingly, the right base end portion 942 is formed so as to protrude upward as compared with the right front end portion 943.

As shown in FIG. 13, the sandwiched portion 91 has a male engagement shape protruding upward so that it can be engaged with a sandwiched portion 95 described below. On the other hand, the sandwiching portion 95 has a female engagement shape that is recessed upward. The sandwiching portion 95 is engaged with the sandwiched portion 91 by sliding the gear case 140 relative to the motor housing 120 from the front side to the rear side relative to the sandwiched portion 91. In addition, the sandwiched portion 91 engaged with the sandwiching portion 95 in this way is not released from the engaged state except for the relative sliding of the gear case 140 with respect to the motor housing 120 described above. ing. That is, the left and right end edges 931 and 941 of the sandwiched portion 91 are set so that the left and right intervals are increased toward the gear case 140 side. That is, as shown in FIG. 13, the left and right end edges 931 and 941 of the sandwiched portion 91 are formed in a shape that is inverted in a cross-section.
On the other hand, the sandwiching portion 95 is formed as follows. That is, as shown in FIG. 11, the sandwiching portion 95 is provided with left and right engaging ridges 97 and 98 that are in sliding contact with the left and right end edges 931 and 941 of the sandwiched portion 91. . It should be noted that the engaging ridges 97 and 98 on both the left and right sides also have a line-symmetric structure in the front-rear direction, like the sandwiched portion 91. For this reason, a slidable contact surface 99 having a recessed female engagement shape is provided between the engagement protrusions 97 and 98. Specifically, on the outer peripheral surface 141 of the gear case 140, engagement protrusions 97 and 98 corresponding to the left and right edges 931 and 941 of the sandwiched portion 91 are provided. For this reason, the engaging ridges 97 and 98 are formed so as to be slidable on the left and right edges 931 and 941 of the sandwiched portion 91.

  Specifically, the left engaging convex strip portion 97 is formed so as to be slidable on the end edge 931 of the left sandwiched portion 93. Further, the right engaging protrusion 98 is formed so as to be slidable on the end edge 941 of the right sandwiched portion 94. For this reason, as shown in FIG. 13, the sandwiched portions 97 and 98 on both the left and right sides are also formed in a shape that forms a reverse letter C in cross section. In other words, the sandwiching portions 97 and 98 on both the left and right sides are also set so that the left and right intervals become narrower toward the device housing and holding portion 85 side. More specifically, the distal end portion 972 of the left sandwiching portion 97 is inclined in the sandwiching direction with respect to the proximal end portion 971 close to the gear case 140. Further, the distal end portion 982 of the right engaging ridge portion 98 is also inclined in the sandwiching direction with respect to the proximal end portion 981 close to the gear case 140. For this reason, as shown in FIG. 13, the sandwiched portions 97 and 98 on both the left and right sides of the gear case 140 are faced while receiving a load from the lower side to the upper side with respect to the left and right end edges 931 and 941 of the sandwiched portion 91. It has the inclined surface contact structure which contacts. In this inclined surface contact structure, the device housing and holding portion 85 for housing the LED irradiation device 80 is held in the gear case 140 by sandwiching the left device housing and holding portion 851 and the right device housing and holding portion 852 in a combined state. It works to make it approach. Further, the left-right distance between the left and right sandwiched portions 97, 98 is also set to be narrower toward the front end. Further, the protruding amount of the sandwiched portions 97 and 98 on the left and right sides gradually increases from the base end toward the front end.

According to the sandwiching structure 90, the gear case 140 is slid relative to the motor housing 120 from the front side to the rear side, and the sandwiching portions 97 and 98 on both the left and right sides are slid with respect to the left and right end edges 931 and 941. As shown in FIG. 13, the left and right sandwiched portions 97 and 98 can be arranged with respect to the left and right end edges 931 and 941 as shown in FIG. The left and right sandwiched portions 97 and 98 with respect to the left and right side edges 931 and 941 thus arranged support the left device housing and holding portion 851 and the right device housing and holding portion 852 that are in the combined state. That is, the sandwiching portions 97 and 98 of the gear case 140 are sandwiched in a direction in which the left housing 201 and the right housing 202 that form a half-molded part are combined. The gear case 140 is made of metal having excellent rigidity. For this reason, the sandwiching portions 97 and 98 forming a part of the gear case 140 can exhibit very excellent sandwiching support force. Further, the sandwiching portions 97 and 98 of the gear case 140 support the combined state of the combined left device housing and holding portion 851 and right device housing and holding portion 852. Further, the left device housing and holding portion 851 and the right device housing and holding portion 852 supported by the sandwiching portions 97 and 98 hold the LED irradiation device 80 by the support of the sandwiching portions 97 and 98.
In this way, due to the pinching support force of the pinching portions 97 and 98 of the gear case 140, the left device housing holding portion 851 and the right device housing holding portion 852 serving as the pinching locations can be used without using a support member such as a screw. Separation of coalescence can be regulated. Further, the gear case 140 is sandwiched in the direction in which the left device housing / holding portion 851 and the right device housing / holding portion 852 are merged, and supports the combined state of the combined left device housing / holding portion 851 and right device housing / holding portion 852. . In addition, the inclined surface contact structure sandwiches the left device housing and holding portion 851 and the right device housing and holding portion 852 in a combined state in the direction in which the left device housing and holding portion 852 is united, whereby the device housing and holding portion 85 that houses the LED irradiation device 80 is geared. It acts so that it may approach toward 140. As a result, the sandwiched portion between the left device housing and holding portion 851 and the right device housing and holding portion 852 can be stably disposed near the gear case 140.

  By the way, the above-described sandwiching structure 90 may be configured by the following modified structure. That is, FIG. 14 is a cross-sectional view showing a sandwiching structure 90A as a first modification of FIG. FIG. 15 is a cross-sectional view showing a sandwiching structure 90B as a second modification of FIG. That is, in the sandwiching structure 90 described above, the sandwiching portions 97 and 98 on both the left and right sides are in contact with the left sandwiched portion 93 and the right sandwiched portion 94 while being in surface contact while receiving a load from the lower side to the upper side. It was configured with a surface contact structure. According to such an inclined surface contact structure, the device housing holding portion 85 for housing the LED irradiation device 80 is attached to the gear case 140 by sandwiching the left device housing holding portion 851 and the right device housing holding portion 852 in the direction in which they are united. It was made to act so as to be close. However, such a sandwiching structure 90 may be configured as a sandwiching structure 90A shown in FIG. 14 or a sandwiching structure 90B shown in FIG. 14 and 15, only the configuration of the sandwiching structures 90A and 90B is different from the configuration described above. For this reason, about the structure other than the structure of this clamping structure 90A, 90B, the code | symbol same as the above-mentioned code | symbol is attached | subjected and description is abbreviate | omitted.

That is, the sandwiching structure 90A shown in FIG. 14 is an example in which the state of surface contact in the tilt direction is changed to the state of surface contact in the vertical direction. In this sandwiching structure 90A, the left sandwiched portion 93A and the right sandwiched portion 94A are formed in a flange shape that protrudes outward and projects. Further, the sandwiching portions 97A and 98A on both the left and right sides of the gear case 140 are formed in a flange shape that protrudes inward and projects. The left sandwiched portion 93A and the right sandwiched portion 94A are engaged and held by sandwiched portions 97A and 98A on the left and right sides of the gear case 140. Even when the sandwiching structure 90A is configured in this way, the sandwiching portions 97A and 98A on both the left and right sides of the gear case 140 are vertical while receiving a load from the lower side to the upper side with respect to the left sandwiched portion 93A and the right sandwiched portion 94A. It has a vertical surface contact structure that makes surface contact in the direction. For this reason, in such a vertical surface contact structure, the device housing holding portion 85 that houses the LED irradiation device 80 is caused to act toward the gear case 140.
Further, the sandwiching structure 90B shown in FIG. 15 is an example having a pattern opposite to that of the sandwiching structure 90A shown in FIG. That is, in this sandwiching structure 90B, the left sandwiched portion 93B and the right sandwiched portion 94B are formed in a flat plate shape that protrudes inward and projects. Further, the sandwiching portions 97B and 98B on the left and right sides of the gear case 140 are formed in a flange shape that protrudes outward. The left sandwiched portion 93B and the right sandwiched portion 94B are engaged and held by sandwiched portions 97B and 98B on the left and right sides of the gear case 140. Even when the sandwiching structure 90B is configured as described above, the sandwiching portions 97B and 98B on both the left and right sides of the gear case 140 are perpendicular to the left sandwiched portion 93B and the right sandwiched portion 94B while receiving a load from the lower side to the upper side. It has a vertical surface contact structure that makes surface contact in the direction. For this reason, even with such a vertical surface contact structure, the device housing holding portion 85 that houses the LED irradiation device 80 is caused to act toward the gear case 140.

  Further, according to the impact driver 10 described above, the LED display device 65 provided in the grip housing 160 is used in two stages of a low speed mode and a high speed mode corresponding to the rotation speed of the electric motor 21 switched by the speed mode switch 61. Either rotation speed can be displayed. As a result, the user can visually check the rotational speed of the electric motor 21 switched by the speed mode switch 61. Therefore, it becomes easy for the user to easily understand the rotation speed of the electric motor 21. Also, according to the impact driver 10 described above, the LED display device 65 displays whether the impact driver 10 is in a power supply state, so the user visually checks whether the impact driver 10 is in a power supply state. Can do. Therefore, it is easy for the user to know whether or not the impact driver 10 is connected to the AC power supply, which is convenient. Further, according to the impact driver 10, the LED display device 65 that displays the rotation speed of the electric motor 21 serves as the function of the power supply lamp for determining whether or not the AC power source is connected. It can be designed with one device and can be made inexpensive. Further, according to the impact driver 10 described above, the LED display device 65 displays the light by emitting the LED lamps 66 and 67, so that it is easy for the user to determine whether the LED is turned on or not, which is advantageous for visual confirmation by the user. It becomes. Further, according to the impact driver 10 described above, the LED display device 65 has two of the left LED lamp 66 and the right LED lamp 67 that display by emitting light. Here, the rotation speed of the electric motor 21 switched by the speed mode switch 61 is divided in stages, and the number of LED lamps 66 and 67 that emit light is determined according to the rotation speed of the electric motor 21 divided in stages. The display to emit light is controlled so as to be different. If it does so, it can carry out by grasping | ascertaining the number of LED lamps 66 and 67 which light-emits a user's visual emission, and it becomes easy to grasp | ascertain the rotational speed of the electric motor 21. FIG. Further, according to the impact driver 10 described above, the display by emitting light has a difference in color. Here, the rotation speed of the electric motor 21 switched by the speed mode switch 61 is divided in stages, and this light is emitted in different colors according to the rotation speed of the electric motor 21 divided in stages. Controls the display that emits light. If it does so, it can carry out by grasping | ascertaining the color of the LED lamps 66 and 67 which light-emit a user, and can grasp | ascertain the rotational speed of the electric motor 21 switched by the speed mode switch 61, and becomes convenient. Further, according to the impact driver 10 described above, the display by emitting light has a difference in brightness. Here, the rotation speed of the electric motor 21 switched by the speed mode switch 61 is divided in stages, and light is emitted with different brightness according to the rotation speed of the electric motor 21 divided in stages. This display for emitting light is controlled. Then, the user can grasp the rotation speed of the electric motor 21 switched by the speed mode switch 61 by visually confirming the brightness of the LED lamps 66 and 67 that emit light. Therefore, it becomes easy for the user to easily understand the rotation speed of the electric motor 21.

  According to the impact driver 10 described above, when the speed mode switch 61 and the LED display device 65 are connected to the same circuit board, the control of the electric motor 21 and the LED display are performed according to the input of the speed mode switch 61. Both the control of the device 65 and the control of the device 65 can be performed simultaneously. As a result, control efficiency can be improved. Further, according to the impact driver 10 described above, when a capacitor or a diode bridge is mounted, a single circuit board can be provided with a further function, and further control efficiency can be achieved. Further, according to the impact driver 10 described above, when a controller is mounted on a circuit board, a single circuit board can be provided with further functions, and further control efficiency can be achieved. Further, according to the impact driver 10 described above, at least the LED display device 65 provided in either the motor housing 120 or the grip housing 160 corresponds to at least the rotation speed of the electric motor 21 switched by the speed mode switch 61. The rotational speed can be displayed in one of two stages, a low speed mode and a high speed mode. As a result, the user can visually check the rotational speed of the electric motor 21 switched by the speed mode switch 61. Therefore, it becomes easy for the user to easily understand the rotation speed of the electric motor 21. Further, according to the impact driver 10 described above, the LED display device 65 displays whether or not the impact driver 10 is in a power supply state, so that the user visually checks whether or not the impact driver 10 is in a power supply state. be able to. Therefore, it is easy for the user to know whether or not the impact driver 10 is connected to the AC power supply, which is convenient. Moreover, according to this impact driver 10, since it serves as both the power supply lamp which discriminate | determines whether it is connected to AC power supply, and the LED display apparatus 65 which displays the rotational speed of the electric motor 21, both functions are made into one. It can be designed with equipment and can be made inexpensive. Further, according to the impact driver 10 described above, the LED display device 65 is provided on the rear surface of the grip end portion 60. Therefore, even when the user holds the impact driver 10 as in use, the electric motor 21 It is possible to visually check the LED display device 65 that displays the rotation speed. This is advantageous for visual confirmation when the impact driver 10 is used. Further, according to the impact driver 10 described above, the speed mode switch 61 is provided on the same surface as the surface on which the LED display device 65 is provided. The display can be visually confirmed. This is advantageous for visual confirmation when the speed mode switch 61 is operated.

  Further, according to the impact driver 10 described above, the positions of the intermediate screw fixing portions 45 and 46 when the left housing 201 and the right housing 202 are screwed are determined by the front protruding coil portion 281 and the rear protruding coil portion 282. Therefore, the dead space that is easily formed between the front protruding coil portion 281 and the rear protruding coil portion 282 can be effectively utilized. As a result, the size of the motor housing 120 is reduced by effectively utilizing the dead space inside the motor housing 120 while ensuring the amount of coil winding so that the rotational driving force generated by the electric motor 21 is sufficient. Thus, the impact driver 10 as a whole can be reduced in size. Further, according to the impact driver 10 described above, the projecting coil portions 281 and 282 are arranged on the front side or the rear side with respect to the positions of the intermediate screw fixing portions 45 and 46 when the left housing 201 and the right housing 202 are screwed. Therefore, the protruding coil portions 281 and 282 can be disposed in a dead space formed by the positions of the intermediate screw fixing portions 45 and 46 when the screws are fixed. As a result, the size of the motor housing 120 is reduced by effectively utilizing the dead space inside the motor housing 120 while ensuring the amount of coil winding so that the rotational driving force generated by the electric motor 21 is sufficient. Thus, the impact driver 10 as a whole can be reduced in size. Further, according to the impact driver 10 described above, the first intermediate screwing portion 45 is disposed on the upper side appropriately separated from the first protruding contact portion 123, and the second intermediate screwing portion 46 is the second intermediate screwing portion 46. It is arranged on the lower side appropriately separated from the protruding contact portion 124. As a result, even when the impact driver 10 falls and receives an impact from the ground, the collision inertia force from the stator core 27 causes the first protruding contact portion 123 and the second protruding contact portion 124 to It will be received and supported by. That is, the first protruding contact portion 123 and the second protruding contact portion 124 act to prevent the stator 26 from rotating with respect to the motor housing 120 and also support the collision inertia force of the stator 26. do. In this manner, for example, even when the impact driver 10 falls and receives an impact from the ground, the stator 26 that generates the collision inertia force is the first projecting contact portion 123 and the second projecting contact portion. 124 and no interference with the two points of the intermediate screwing portions 45 and 46. Thereby, the screwing at the two points of the intermediate screwing parts 45 and 46 can be strongly protected from damage. Further, according to the impact driver 10 described above, the rear protruding coil part 282 protruding rearward from the stator core 27 is more than the front protruding coil part 281 protruding forward from the stator core 27. Since it is formed large, the arrangement side of the front projecting coil portion 281 can be reduced while securing the amount of coil winding so that the rotational driving force generated by the electric motor 21 is sufficient. Accordingly, the configuration in which the front protruding coil portion 281 is disposed can be slimmed, and the impact driver 10 can be configured to be easy to handle with the front side slimmed.

Further, according to the impact driver 10 described above, the arrangement positions of the first front screwing portion 43 and the second front screwing portion 44 are arranged without interfering with the bearing box 51. Further, the first front screwing portion 43 and the second front screwing portion 44 that are arranged close to the bearing box 51 in this way are lower than the arrangement positions of the upper left screwing portion 71 and the upper right screwing portion 73. The lower left screwing portion 72 and the lower right screwing portion 74 are arranged so as to be on the upper side. As a result, the upper left screwing portion 71 and the upper right screwing portion 73 are disposed on the upper side in the arrangement position, and the overhang in the left-right width direction of the upper left screwing portion 71 and the upper right screwing portion 73 is reduced. be able to. Further, even if the lower left screwing portion 72 and the right lower screwing portion 74 are disposed, they are arranged on the lower side, and the left lower screwing portion 72 and the right lower screwing portion 74 are projected in the left-right width direction. Can be small. That is, according to the impact driver 10 described above, the gear case 140 including the power transmission mechanism portion 31 can be screwed to the front end side of the motor housing 120, and the power transmission mechanism portion 31 thus screwed is included. Further, the overhang in the left-right width direction of the entire impact driver 10 can be reduced. Further, according to the impact driver 10 described above, the first front screwing portion 43 and the second front screwing portion 44 are composed of the upper left screwing portion 71 and the upper right screwing portion 73, the lower left screwing portion 72 and the right screw fixing portion 72. It is arranged between the lower screwing portion 74. For this reason, the overhang | projection of the left-right width direction of the 1st front part screwing part 43 and the 2nd front part screwing part 44 can be made small. Thus, according to the impact driver 10 described above, the gear case 140 including the power transmission mechanism portion 31 can be screwed to the front end side of the motor housing 120, and the power transmission mechanism portion 31 thus screwed can be provided. The overhang in the left-right width direction of the entire impact driver 10 can be reduced. Further, according to the impact driver 10 described above, the cover 15 is provided so as to cover the outer peripheral surface 141 of the gear case 140 and the externally exposed portion 511 of the bearing box 51. For this reason, the cover 15 can cover the outer peripheral surface 141 of the gear case 140 and the externally exposed portion 511 of the bearing box 51. Thus, even when the outer peripheral surface 141 of the gear case 140 and the externally exposed portion 511 of the bearing box 51 hit the processing material, the processing material can be prevented from being damaged by the cover 15.
Further, the front side portion of the bearing box 51 protrudes from the front end of the motor housing 120 and is built in the gear case 140. As a result, the heat accumulated in the bearing box 51 is transmitted to the gear case 140 and easily dissipated. Here, the outer peripheral exposed portion 511 of the front portion of the bearing box 51 protrudes from the front end of the motor housing 120, and the outer peripheral exposed portion 511 is covered with the resin cover 15 described above. Thus, the heat accumulated in the bearing box 51 can be released to the front side of the gear case 140 without being transmitted to the exposed peripheral surface of the drive structure 12.

In addition, in the electric tool and electric impact tool which concern on this invention, it is not limited to the structure of the impact driver 10 of above-described embodiment, Even if it changes suitably and is comprised. Good. That is, in the above-described embodiment, an electric impact tool called a so-called impact driver is described as an example of the electric tool according to the present invention. However, the electric tool and the electric impact tool according to the present invention are not limited to the example of the impact driver 10 as described above, but for an appropriate electric tool and an electric impact tool configured using an electric motor as a drive source. Can be applied.
Further, in the device housing / holding portion 85 of the above-described embodiment, the LED irradiation device 80 corresponding to the lighting device according to the present invention is housed and held. However, the device housing / holding unit according to the present invention is not limited to the LED irradiation device 80 as described above, and an appropriate lighting device may be housed and held. Further, the device housing / holding unit may house and hold a device other than the lighting device.
Further, in the above-described embodiment, the mode switched by the speed mode switch 61 (speed change switch) is a two-stage mode of the low speed mode and the high speed mode. However, the switching by the speed change switch according to the present invention may be in three stages or four stages. Furthermore, the switching by the speed change switch is not limited to stepwise switching, and includes intermittent smooth switching.
Further, in the above-described embodiment, the display unit that displays the rotation speed is configured by the LED display device 65. However, the display unit according to the present invention is not limited to such an example, and may be configured by a display device using a liquid crystal display, for example. Further, the portion where the speed mode switch 61 and the LED display device 65 are provided is not limited to the rear surface of the grip end portion 60 described above, and may be provided in any portion of the housing 20. .
Further, in the grip end portion 60 of the above-described embodiment, the area of the front / rear left / right cross section of the grip end portion 60 is larger than the area of the front / rear left / right cross section of the grip 16 portion. It was formed in a substantially box shape. However, the grip end portion according to the present invention is not limited to such an example, and may be formed to have a cross-sectional area that is not different from the grip 16 portion. However, when the grip end portion 60 is formed as in the above-described embodiment, it is possible to improve the ease of hand gripping and to make the power tool easy to handle.
Further, in the stator core 27 of the above-described embodiment, the upper outer peripheral plane 271 that is chamfered in a flat shape is provided at the upper portion, and the lower outer peripheral plane 272 that is chamfered in a flat shape is also provided in the lower portion. It was supposed to be. However, the stator core according to the present invention is not limited to such an example, and an appropriate shape may be selected instead of the shape chamfered in a planar shape. In addition, when the upper outer peripheral plane 271 and the lower outer peripheral plane 272 are provided as in the above-described embodiment, the bulkiness of the stator core 27 in the vertical direction can be suppressed. As a result, the power tool can be made compact.
Moreover, the electric motor 21 in the above-described embodiment is configured using electric power as a power source. That is, the above-described electric motor 21 uses electric power supplied from an AC power source (AC power source) such as a household power source as a power source that generates a driving force by converting it into a rotational driving force. However, the motor according to the present invention is not limited to such an example, and electric power supplied from a rechargeable battery that is appropriately mounted may be used as a power source. The supplied compressed air may be used as a power source.

By the way, in view of the above-described embodiment, the present invention can be grasped as follows.
That is, as a fifth invention,
A first housing and a second housing which are combined to form a housing;
A gear case fixed to the combined housing,
The first housing and the second housing are fixed by screws;
The gear case is configured to be engaged with the first housing and the second housing so as to suppress separation of the first housing and the second housing. The invention can be grasped.
According to the fifth invention grasped as described above, the first housing and the second housing to be combined can be prevented from being separated from each other, and the assembling property as the housing is improved, and the durability is increased. The electric tool can be made.
Furthermore, as a sixth invention,
A first housing and a second housing which are combined to form a housing;
A gear case fixed to the combined housing,
The first housing and the second housing are fixed by screws;
The gear case is configured to be associated with the first housing and the second housing so as to suppress deformation of the first housing and the second housing. The invention can be grasped.
According to the sixth invention grasped in this way, it is possible to suppress the mutual deformation of the first housing and the second housing to be combined, to improve the assemblability as the housing, and to increase the durability. The electric tool can be made.

10 Impact driver (electric tool, electric impact tool)
DESCRIPTION OF SYMBOLS 11 Tool main body 12 Drive structure 120 Motor housing 121 Intake side vent 122 Exhaust side vent 123 1st protrusion contact part 124 2nd protrusion contact part 13 Motor drive part 14 Drive conversion mechanism part 140 Gear case 141 Outer peripheral surface of gear case 142 Screw Stop Notch Groove 144 Base End Opening 145 Tip Opening 146 Screw Insertion Hole 15 Cover 151 Swelling Shape 152 Swelling Shape Front 16 Grip 160 Grip Housing 18 Electrical Cord 181 Guide Member 19 Hook 20 Housing 201 Left Housing 202 Right Housing 205 Connecting flange portion 206 Connecting flange portion 207 Holding flange portion 208 Holding flange portion 21 Electric motor (drive motor)
22 Motor shaft 23 Rotor 231 Teeth 24 Commutator 25 Brush 26 Stator 27 Stator core 271 Upper outer peripheral plane 272 Lower outer peripheral plane 28 Field coil 281 Front projecting coil section 282 Rear projecting coil section 29 Cooling fan 31 Power transmission mechanism Part 32 planetary gear mechanism 320 internal gear 321 planetary gear train 33 striking mechanism 34 intermediate shaft 35 biasing spring 36 hammer 37 anvil 38 striking piece 39 drive output shafts 41, 42 rear screwing part 43 first front screwing part ( 1st united screw)
44 Second front screw fixing portion (second combined screw)
45 1st middle part screw stop part (screw fixed place)
46 2nd intermediate part screw stop part (screw fixed location)
47 Upper screw stop portion 48 Intermediate screw stop portion 49 Lower screw stop portion 410, 420, 430, 440, 450, 460, 470, 480, 490 Male screw 50 Buffer space 51 Bearing box 511 External exposed portion 52 Support case 53 Support receiver Overhang portion 54 Bearing holding portion 55 Front bearing 56 Rear bearing 57 Intermediate shaft bearing 60 Grip end portion 61 Speed mode switch (speed changeover switch)
62 Mode switch body 63 Operation section 64 Opening section 65 LED display device (display section)
66 Left LED lamp (light emitter)
67 Right LED lamp (light emitter)
71 Upper left screw stop (upper left screw)
72 Lower left screw stop (lower left screw)
73 Upper right screw stop (upper right screw)
74 Lower right screw stop (lower right screw)
710, 720, 730, 740 Male screw 75 Drive switch 76 Switch body 77 Operation trigger 78 Left / right rotation direction switching button 79 Controller 80 LED irradiation device (lighting device)
81 LED body 83 Holding body 85 Device housing holding portion 851 Left device housing holding portion 852 Right device housing holding portion 853 Left housing recess 854 Right housing recess 86 Top surface 90 Pinch structure 91 Pinch portion 92 Upper peripheral surface 93 Left pinch portion 931 End edge 932 Left base end portion 933 Left front end portion 94 Right sandwiched portion 941 End edge 942 Right base end portion 943 Right front end portion 95 Pinch portion 97 Left engagement protrusion 971 Base end portion 972 Tip portion 98 Right engagement protrusion Strip 981 Base end 982 Tip 99 Slide contact surface B Driver bit

Claims (4)

A motor,
A housing formed by merging half-formed parts and containing the motor;
A gear case that houses a power transmission mechanism to which the rotational driving force of the motor is transmitted and is disposed on the motor output side of the housing;
An electric power tool having an output drive unit that protrudes to the outside of the output side from the gear case and outputs a rotational driving force via the power transmission mechanism,
The power tool is characterized in that the gear case is sandwiched in a direction in which the half-formed parts are joined together and supports the joined state of the joined half-formed parts. A motor,
A housing formed by merging half-formed parts and containing the motor;
A gear case that houses a gear to which the rotational driving force of the motor is transmitted and is disposed on the motor output side of the housing;
An electric tool having a rotating shaft that protrudes to the outside of the output side from the gear case and rotates by a rotational driving force via the power transmission mechanism,
The housing is accommodated by sandwiching a lighting device that illuminates the outside of the output side in the direction in which the half-formed parts are combined,
The gear case accommodates the lighting device by sandwiching at least a part of the united state of the portion where the lighting device is accommodated among the combined half-molded components in a direction in which the half-molded components are merged. A power tool characterized by supporting the united state of a portion to be operated. A motor,
A housing formed by merging half-formed parts and containing the motor;
A gear case that houses a gear to which the rotational driving force of the motor is transmitted and is disposed on the motor output side of the housing;
An electric tool having a rotating shaft that protrudes to the outside of the output side from the gear case and rotates by a rotational driving force via the power transmission mechanism,
The housing is accommodated by sandwiching a lighting device that illuminates the outside of the output side in the direction in which the half-formed parts are combined,
The gear case accommodates the lighting device by sandwiching at least a part of the united state of the portion where the lighting device is accommodated among the combined half-molded components in a direction in which the half-molded components are merged. A power tool characterized in that a portion to be operated is brought close to the gear case. In the electric tool according to any one of claims 1 to 3,
A device housing and holding portion that extends from the housing toward the output side and that houses and holds the lighting device extends from the housing to the outer peripheral range of the gear case toward the output-side tip of the gear case. A power tool characterized by that.

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