JP2017144523A - Rotary tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily visually recognize display content such as a manufacturer and product information, which are described on an external surface of a rotary tool, by a user while reducing the size of a motor housing.SOLUTION: An impact driver 10 has a brushless motor to be a driving source and a motor housing section 31 for storing the brushless motor and performs a rotation operation of an anvil 56. A rear cover member 60 which is different from the motor housing section 31 is assembled to a rear section of the motor housing section 31. The rear cover member 60 has a left side peripheral wall section 65 and a right side peripheral wall section 75, which are different from the motor housing section 31. In this case, a left side outer peripheral surface 66 of the left side peripheral wall section 65 extends up to a radial direction outside range exceeding an outer peripheral range of the motor housing section 31, thereby enabling providing of a logo display section 67 which can be discriminated up to a range exceeding the outer peripheral range of the motor housing section 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotary tool that rotates an output shaft.

  Conventionally, rotary tools represented by impact drivers are known (see Non-Patent Document 1). In such a rotary tool, a motor serving as a drive source is built in a motor housing. A grip housing that can be grasped by hand is provided below the motor housing. In such a rotary tool, a name plate on which a manufacturer's logo or product information is written may be provided on the outer peripheral surface of the motor housing so as to be visible to the user. The logo and name plate provided in this way are visible from the outside even when the user holds the grip housing by hand.

April 2015 Makita General Catalog, page 16 “Rechargeable Impact Driver”

  By the way, in the above-described rotary tool, the motor housing is miniaturized to enhance the ease of handling as a tool. On the other hand, when the motor housing is small, the above-described logo and name plate are disposed in a narrow range. If it does so, the size of the character described in a logo or a nameplate must be made small, and it will become difficult to visually recognize for a user.

  The present invention has been made in view of such circumstances, and the problem to be solved by the present invention is to provide a rotary tool for rotating the output shaft, while reducing the size of the motor housing, while reducing the size of the motor housing. It is to make it easy for the user to visually recognize the display contents of the manufacturer and product information described on the outer surface.

  In solving the above-described problems, the rotary tool according to the present invention takes the following means. That is, the rotary tool according to the first aspect of the present invention includes a resin motor housing that houses a motor, a grip housing that is integrally provided with the motor housing and below the motor housing, and is driven by the motor. And an output portion disposed in front of the motor, and an outer peripheral portion different from the motor housing is disposed on a side portion of the motor housing.

  According to the rotary tool according to the first aspect of the present invention, since the outer peripheral portion different from the motor housing is arranged on the side portion of the motor housing, the display can be visually recognized even beyond the outer peripheral range of the motor housing. Can be provided. Thus, even when the motor housing is downsized and the outer peripheral range of the motor housing is narrowed, the display portion can be provided at a location different from the outer periphery of the motor housing. Therefore, even in a rotary tool whose motor housing has been reduced in size, the displayed content is easily visible to the user.

  The rotary tool according to a second aspect of the present invention is configured such that, in the rotary tool according to the first aspect, the outer peripheral portion is disposed so as to cover the outer peripheral surface of the motor housing. According to the rotary tool according to the second aspect of the invention, since the outer peripheral portion is arranged so as to cover the outer peripheral surface of the motor housing, the outer peripheral portion can be provided without changing the housing configuration including the motor housing.

  The rotary tool according to a third aspect of the present invention is the rotary tool according to the first aspect, wherein the motor housing is provided with a notch part of which the outer peripheral range of the motor housing is partially cut out. The said outer peripheral part is the structure of being penetrated and arrange | positioned at the said notch part. According to the rotary tool according to the third aspect of the invention, since the outer peripheral portion is disposed so as to enter the notch portion provided in the motor housing, the outer peripheral dimension when the outer peripheral portion is disposed can be suppressed.

  A rotary tool according to a fourth aspect of the present invention is the rotary tool according to the second or third aspect, wherein the outer peripheral portion is formed integrally with another housing member assembled to the motor housing. This is the configuration. According to the rotary tool according to the fourth aspect of the invention, since the outer peripheral portion is formed integrally with the other housing member assembled to the motor housing, the number of parts can be reduced, which is advantageous for manufacturing.

  A rotary tool according to a fifth aspect of the present invention is the rotary tool according to the fourth aspect, wherein the housing member is a cover body assembled to a rear portion of the motor housing. According to the rotary tool according to the fifth aspect of the invention, since the housing member is a cover body that is assembled to the rear portion of the motor housing, the outer peripheral portion can be assembled simultaneously with the assembly of the cover body.

  A rotary tool according to a sixth aspect of the present invention is the rotary tool according to the fourth aspect, wherein the housing member is a mechanism case assembled to the front portion of the motor housing. According to the rotary tool according to the sixth aspect of the invention, since the housing member is a mechanism case that is assembled to the front portion of the motor housing, the outer peripheral portion can be assembled simultaneously with the assembly of the mechanism case.

  A rotary tool according to a seventh aspect of the present invention is the rotary tool according to the fourth aspect, wherein the housing member is a case cover of a mechanism case assembled to the front portion of the motor housing. . According to the rotary tool of the seventh invention, since the housing member is a case cover of a mechanism case that is assembled to the front portion of the motor housing, the outer peripheral portion can be easily assembled simultaneously with the assembly of the case cover.

  A rotary tool according to an eighth aspect of the present invention is the rotary tool according to any one of the first to seventh aspects, wherein the motor housing is provided with a vent hole that communicates the inside and the outside. The outer peripheral portion is arranged so as to cover the vent hole so as to allow ventilation. According to the rotary tool according to the eighth aspect of the invention, since the outer peripheral portion is disposed so as to cover the vent hole so that the vent hole can be ventilated, the vent hole can communicate with the inside and the outside of the motor housing. The outer peripheral surface can be formed up to the range, and the range of the outer peripheral surface can be expanded.

  A rotary tool according to a ninth aspect of the present invention is the rotary tool according to any one of the first to eighth aspects, wherein a logo display portion is provided on an outer peripheral surface of the outer peripheral portion. It is. According to the rotary tool according to the ninth aspect of the present invention, since the logo display portion is provided on the outer peripheral surface of the outer peripheral portion, the user can visually recognize the logo.

  The rotary tool according to a tenth aspect of the present invention is the rotary tool according to any one of the first to eighth aspects, wherein a product information display portion is provided on an outer peripheral surface of the outer peripheral portion. It is a configuration. According to the rotary tool according to the tenth aspect, since the product information display section is provided on the outer peripheral surface of the outer peripheral section, the user can visually recognize the product information.

  According to an eleventh aspect of the present invention, there is provided a rotary tool for housing a motor, a grip housing disposed integrally with the motor housing and below the motor housing, and the motor housing. A metal case that is fixed and disposed in front of the motor housing, and an output unit that is driven by the motor and supported by the case, and that a logo display unit is formed on the case. It is. According to the rotary tool of the eleventh aspect of the present invention, since the logo display portion is formed on the metal case disposed in front of the motor housing, the motor housing can be reduced in size and the outer peripheral range of the motor housing. The logo display portion can be visually recognized even when the size of the screen becomes narrow. Therefore, even if the rotary tool is downsized, the displayed content is easily visible to the user.

  A rotary tool according to a twelfth aspect of the present invention is the rotary tool according to the eleventh aspect, wherein a bumper holding portion for supporting a bumper is formed at a front portion of the case, and the shaft of the motor A bearing box for supporting the bearing, and a rear portion of the case has a bearing box support portion for supporting the bearing box, and the logo display portion is located behind the bumper holding portion, and It is the structure of arrange | positioning ahead of a bearing box support part. According to the rotary tool of the twelfth aspect of the present invention, since the logo display portion is disposed behind the bumper holding portion and in front of the bearing box support portion, the logo display portion is disposed on the front side while being located at a position that is not easily damaged from the outside. It will be excellent in visibility.

  A rotary tool according to a thirteenth aspect of the present invention is the rotary tool according to the eleventh aspect, wherein the logo display portion is fitted in the rotation restricting direction with respect to the motor housing. . According to the rotary tool according to the thirteenth aspect of the invention, the logo display portion is fitted in the rotation restricting direction with respect to the motor housing, so that the logo display portion can also serve as a case anti-rotation action for the motor housing. .

It is an external appearance perspective view which shows the impact driver of 1st Embodiment. It is the side view which looked at the impact driver of FIG. 1 on the right side. It is sectional drawing which shows the illustration (III)-(III) section arrow of FIG. It is sectional drawing which shows the impact driver of FIG. 1 by right-and-left half sectional view. It is a right perspective view showing a rear cover member as a single item. It is a right perspective view which shows the rear cover member from which the name label was removed as a single item. It is a left perspective view showing a rear cover member as a single item. It is a rear perspective view showing a rear cover member as a single item. It is a front perspective view which shows a hammer case cover by a single item. It is a rear side perspective view which shows a hammer case cover by a single item. It is an external appearance perspective view which shows the impact driver of 2nd Embodiment. FIG. 12 is a side view of the impact driver of FIG. 11 viewed from the right side. It is sectional drawing which shows the illustration (XIII)-(XIII) sectional arrow of FIG. It is a right perspective view showing a peripheral wall cover removed. It is an external appearance perspective view which shows the impact driver of 3rd Embodiment. FIG. 16 is a side view of the impact driver of FIG. 15 viewed from the left side. It is an external appearance perspective view which shows a hammer case by a single item. It is the side view which looked at the hammer case of FIG. 17 on the left side.

[First Embodiment]
Hereinafter, a first embodiment for carrying out a rotary tool according to the present invention will be described with reference to FIGS. 1 to 4 show an impact driver 10 as a rotary tool according to the present invention. The external perspective view of FIG. 1 shows the impact driver 10 of the first embodiment. The side view of FIG. 2 shows a right side view of the impact driver 10 of FIG. The cross-sectional view of FIG. 3 shows the (III)-(III) cross-sectional view of FIG. The cross-sectional view of FIG. 4 shows the impact driver 10 of FIG. The right perspective view of FIG. 5 shows the rear cover member 60 as a single item. The right perspective view of FIG. 6 shows the rear cover member 60 from which the name label 77 has been removed as a single item. The left perspective view of FIG. 7 shows the rear cover member 60 as a single item. The rear perspective view of FIG. 8 shows the rear cover member 60 as a single item. The front perspective view of FIG. 9 shows the hammer case cover 70 as a single item. The rear perspective view of FIG. 10 shows the hammer case cover 70 as a single item.

  Hereinafter, the impact driver 10 will be described based on the “front / rear / up / down / left / right” directions shown in the drawings. Incidentally, the downward direction in the impact driver 10 is defined based on the arrangement direction of the grip part 20. Further, the forward direction of the impact driver 10 is defined based on the arrangement direction of the anvil 56. The anvil 56 corresponds to the output shaft according to the present invention. That is, the forward direction specified in the figure corresponds to the output direction according to the present invention. A battery 100 for an electric tool as a power source is mounted on the tool body 11 of the impact driver 10 shown in FIGS. The battery 100 is mounted on a battery mounting portion 13 set at the lower part of the tool body 11.

  The impact driver 10 is a pistol tool that rotates the anvil 56. Specifically, the impact driver 10 is configured as a rotary impact tool. Incidentally, when the impact driver 10 is used, a bit B for screw fastening as a tip tool is attached to the anvil 56 set at the front portion of the tool body 11. When a torque of a predetermined value or more is applied from the outside to the rotating operation of the anvil 56, a striking force in the rotating direction is applied to the rotating operation. In addition, as for the battery 100 with which the battery mounting part 13 is mounted | worn, BL1450 made from Makita Corporation is mentioned, for example. The battery 100 is mounted by sliding relative to the battery mounting portion 13 from the front to the rear. When removing the battery 100 from the battery mounting portion 13, the battery 100 is slid relative to the battery mounting portion 13 from the rear to the front while pressing the unlock button 101 provided on the battery 100. It is designed to be removed.

  As shown in FIG. 4 and the like, the tool body 11 roughly includes a battery mounting portion 13, a grip portion 20, a motor portion 30, and a hammer portion 40. The battery mounting part 13 is provided in the lower part of the housing 14. The housing 14 is formed by combining the left divided housing 15 and the right divided housing 16. The left split housing 15 and the right split housing 16 are configured to be split in the left-right direction, which is an intersecting direction, with respect to the axial direction (front-rear direction) of the anvil 56. The left split housing 15 and the right split housing 16 are held in a combined state at eight screw fastening locations (12 in the figure). Specifically, the battery mounting portion 13 is provided with two screw fastening locations (indicated by reference numeral 12), and the grip portion 20 is provided with two screw fastening locations (indicated by reference number 12). The hammer portion 40 is provided with four screw fastening locations (indicated by reference numeral 12).

  The housing 14 also serves as a grip housing portion 21 that is gripped by the user's hand and a motor housing portion 31 that houses the illustrated brushless motor 33. The grip housing part 21 is disposed below the motor housing part 31. The battery mounting portion 13 set at the lower portion of the tool body 11 is configured to be detachable by sliding the battery 100. For this reason, the battery mounting portion 13 is provided with a rail structure (not shown) and a locking structure 132 corresponding to the battery 100. The battery mounting portion 13 is provided with a terminal 131 supported by the housing 14 as shown in FIG. The front end position of the battery mounting portion 13 is set to a position that substantially matches the front end position of the hammer portion 40 described later in the front-rear direction. Further, the rear end position of the battery mounting part 13 is set so as to substantially coincide with the rear end position of the motor part 30 described later in the front-rear direction.

  A controller 133 is housed in the housing 14 immediately above the battery mounting portion 13. In addition, an operation display unit 17 is provided on the upper side of the battery mounting unit 13 protruding to the front side. Further, a strap member 18 and a hook member 19 are attached to the housing 14 as shown in FIG. Further, on the upper side of the battery mounting portion 13, a grip portion 20 that is grasped by the user's hand is provided. The grip portion 20 is formed by a grip housing portion 21 that is a part of the housing 14. The grip portion 20 is formed to extend in the vertical direction intersecting the axial direction (front-rear direction) of the anvil 56. Note that the grip housing portion 21 that forms the grip portion 20 is selected to have a shape that can be easily gripped by the user when the user grips the grip housing portion 21 with a hand.

  An operation switch 22 is provided on the upper portion of the grip housing portion 21. As shown in FIG. 4, the operation switch 22 switches the rotation direction of the forward / reverse rotation of the anvil 56 and the switch main body 23 housed in the grip housing portion 21, the trigger member 24 pushed into the switch main body 23 and input. And a switching knob 25. The operation switch 22 transmits an operation signal to the above-described controller 133 in response to an input by pushing the trigger member 24. The trigger member 24 is disposed on the front surface, and the rear portion of the grip housing portion 21 opposite to the trigger member 24 has a concave shape that is recessed toward the front side. A switching knob 25 is disposed on the upper side of the switch body 23, and an LED irradiation device 26 is provided on the upper side of the trigger member 24. The LED irradiation device 26 is configured to be able to irradiate the front of the impact driver 10.

  On the upper side of the grip part 20, the motor part 30 and the hammer part 40 are arranged side by side from the rear to the front. The motor unit 30 includes a brushless motor 33 serving as a drive source. The brushless motor 33 is housed and supported by a motor housing portion 31 that is a part of the housing 14. The motor housing portion 31 supports the brushless motor 33 and also supports a bearing box 50 and a hammer case 58 which will be described later. The brushless motor 33 includes a rotor 331 that rotates integrally with the motor shaft 35, a stator 333 that rotates the rotor 331, and a sensor substrate 335 that detects the rotational position of the rotor 331. A permanent magnet 332 is attached to the rotor 331. A coil 334 is wound around the stator 333. The coil 334 generates a magnetic field when a current flows. The sensor substrate 335 is disposed on the front side of the rotor 331 and detects the rotational position of the rotor 331.

  The motor shaft 35 is disposed so that the axial direction extends in the front-rear direction. The motor shaft 35 is rotatably supported by a front bearing 351 whose front side is supported by the motor housing portion 31. The motor shaft 35 is rotatably supported by a rear bearing 352 whose rear side is supported by the cap body 61 of the rear cover member 60. A fan 36 having the motor shaft 35 as a rotation shaft is integrally attached to the rear portion of the motor shaft 35. The fan 36 is disposed on the rear side of the rotor 331 and on the front side of the rear bearing 352. The fan 36 is constituted by a centrifugal fan that rotates integrally with the motor shaft 35. The rotating fan 36 sucks air from the front side while ventilating the inside of the stator 333, and exhausts it to the outside in the rotational radial direction through the exhaust opening 381 of the cap body 61 shown in FIG. An input gear 37 is attached to the front end of the motor shaft 35. The input gear 37 inputs a rotational driving force to the planetary gear 42 of the reduction mechanism 41 that meshes therewith.

  The rear end of the motor housing portion 31 is set as an open end 311 as shown in FIG. The opening of the open end 311 is closed by the cap body 61 of the rear cover member 60. The cap body 61 is screwed to the rear portions of the left divided housing 15 and the right divided housing 16 by male screws (not shown). The cap body 61, which will be described in detail later, forms a housing structure integrally with the motor housing portion 31. A rear bearing 352 is disposed and held substantially at the center of the rear end wall 62 of the cap body 61. The outer ring portion 63 of the cap body 61 is provided with an exhaust opening 381 as shown in FIG. The exhaust opening 381 is positioned outside the fan 36 in the rotational radial direction, and communicates between the outside and the inside in the rotational radial direction. As indicated by phantom lines in FIG. 1, the motor housing portion 31 is provided with a plurality of intake openings 382. The intake opening 382 serves as a vent for intake from outside. The outside air taken in from the intake opening 382 is cooled to the brushless motor 33 and then exhausted from the exhaust opening 381 to the outside. The intake opening 382 corresponds to a vent hole according to the present invention, and communicates the outside and the inside of the motor housing portion 31.

  The hammer portion 40 is disposed on the front side of the motor portion 30 and is supported by the motor housing portion 31. The hammer part 40 generally includes a speed reduction mechanism 41 and a striking mechanism 51. The speed reduction mechanism 41 and the striking mechanism 51 are configured as an output unit according to the present invention. The speed reduction mechanism 41 transmits the rotational drive of the motor shaft 35 to the striking mechanism 51 by decelerating it. The speed reduction mechanism 41 is supported by the bearing box 50. The striking mechanism 51 is supported by the hammer case 58. The bearing box 50 and the hammer case 58 are arranged in order from the rear to the front, and house both the speed reduction mechanism 41 and the striking mechanism 51. Both the bearing box 50 and the hammer case 58 are formed of metal. The bearing box 50 and the hammer case 58 correspond to a mechanism case according to the present invention. The speed reduction mechanism 41 and the striking mechanism 51 are disposed on the output side of the motor housing portion 31 and correspond to the power transmission mechanism according to the present invention. The speed reduction mechanism 41 and the striking mechanism 51 transmit the driving force of the brushless motor 33 to the anvil 56.

  A hammer case cover 70 is assembled on the outer periphery of the hammer case 58. The hammer case cover 70 is made of a transparent resin different from the metal hammer case 58. The hammer case cover 70 is formed so as to cover the outer periphery of the hammer case 58. The hammer case cover 70 protects the hammer case 58 from being exposed to the outside. A locking member 64 is disposed on the front side of the hammer case cover 70. The locking member 64 is locked to the locked portion 59 near the front end of the hammer case 58 while pressing the front end portion 71 of the hammer case cover 70. In this way, the hammer case cover 70 is supported by the hammer case 58. As shown in FIGS. 9 and 10, the hammer case cover 70 is formed by integrally forming a cover main body 72, a left locking side portion 73, and a right locking side portion 74.

  As shown in FIG. 4, the lowermost part of the hammer case 58 is covered by the housing 14, and the uppermost part is covered by the cover body 72. Further, the front end portion 71 of the hammer case 58 is pressed by a locking member 64. The left locking side portion 73 is provided so as to protrude from the left portion of the cover main body 72 to the left side. The right locking side portion 74 is provided so as to protrude from the right portion of the cover main body 72 to the right side. The left locking side portion 73 has a shape that covers the front end of the left peripheral wall portion 65 protruding to the left side. The right locking side portion 74 has a shape that covers the front end of the right peripheral wall portion 75 that protrudes to the right side. Locking recesses 733 and 743 are provided on the rear surfaces of the left lock side portion 73 and the right lock side portion 74, respectively. These locking recesses 733 and 743 are formed in a concave shape recessed forward so that the locking front portions 657 and 757 protruding forward can be locked. The outer peripheral surface 735 of the left locking side portion 73 is formed so as to be smoothly connected to the left outer peripheral surface 66 of the left peripheral wall portion 65, and the outer peripheral surface 745 of the right locking side portion 74 is the right peripheral wall portion 75. It is formed so as to be smoothly connected to the right outer peripheral surface 76 of the.

  The speed reduction mechanism 41 is configured by a widely used planetary gear mechanism. The speed reduction mechanism 41 has three planetary gears 42 that mesh with the input gear 37. The planetary gear 42 is rotatably supported by a carrier 47 disposed on the output side via a support shaft 46. The planetary gear 42 meshes with an internal gear 45 disposed on the outer peripheral side. That is, the planetary gear 42 rotates when a rotational driving force is transmitted from the meshing input gear 37 and revolves in the meshing internal gear 45. The revolution of the planetary gear 42 becomes the rotation of the carrier 47. The carrier 47 rotates the drive shaft 52 integrally. The carrier 47 is rotationally supported by the bearing 48 on the rear side, and is rotationally supported by the needle bearing 563 together with the anvil 56 on the front side through the housing recess 569. That is, the bearing 48 supports the motor shaft 35. The bearing 48 is supported by the bearing box 50. The internal gear 45 is fixed and held in the bearing box 50 so as not to be relatively rotatable. The internal gear 45 is restricted from coming out of the bearing box 50 by a retaining ring 49 that is locked in the bearing box 50.

  The striking mechanism 51 generally includes a drive shaft 52, a steel ball 53, a hammer 54, a compression spring 55, and an anvil 56. These drive shaft 52, steel ball 53, hammer 54, compression spring 55 and anvil 56 are housed and supported in a hammer case 58. The drive shaft 52 is driven to rotate integrally with the carrier 47. A steel ball holding recess 521 is provided on the peripheral surface of the drive shaft 52. The steel ball holding recess 521 is formed in a concave shape that can accommodate half of the steel ball 53. The concave shape of the steel ball holding concave portion 521 is a concave shape extending in the front-rear direction. That is, the steel ball 53 can roll in the steel ball holding recess 521 extending in the tilt direction. On the other hand, the hammer 54 having an appropriate weight is also provided with a guide groove 541 in which the steel ball 53 rolls. The guide groove 541 is provided at a location where it can face the steel ball holding recess 521 by relative rotation. The guide groove 541 is also formed in a concave shape that can accommodate half of the steel ball 53. The concave shape of the guide groove 541 is a concave shape extending in the front-rear direction. That is, the steel ball 53 can roll in the guide groove 541 extending in the front-rear direction.

  The hammer 54 is provided with an accommodation recess 543 for accommodating the compression spring 55. The housing recess 543 has a concave shape that is bent in the front-rear direction. The front end of the compression spring 55 contacts the inner end on the front side of the housing recess 543 via the steel ball 551 and the washer 553. The compression spring 55 has a rear end abutted and supported by the carrier 47 and a front end abutted and supported in the housing recess 543, and always urges the hammer 54 forward. A striking piece 545 is provided on the front surface of the hammer 54 so as to protrude forward. The striking piece 545 has a protruding shape that hits a striking arm 565 provided at the rear end of the anvil 56. Two hitting piece portions 545 are provided at intervals of 180 degrees in the circumferential direction on the front surface of the hammer 54.

  The anvil 56 has an anvil body 561 and the hitting arm portion 565 described above. The striking arm portion 565 extends in an arm shape radially outward from the rear end of the anvil body 561 to a position facing the striking piece portion 545. Two striking arm portions 565 are also provided at intervals of 180 degrees in the circumferential direction at the rear end of the anvil 56. The anvil body 561 is formed in a substantially cylindrical shape extending in the front-rear direction. A needle bearing 563 is in contact with the outer periphery of the anvil body 561. The needle bearing 563 rotatably supports the anvil body 561 (anvil 56) that contacts the needle bearing 563 while being accommodated and held in the hammer case 58. A bit holding mechanism 57 for holding the bit B is provided at the front end of the anvil body 561. The bit holding mechanism 57 accommodates and holds the bit B in the interior 562 of the anvil body 561.

  The striking mechanism 51 operates as follows. That is, when a certain amount of rotational resistance (screw tightening resistance) is applied to the anvil 56 via the bit B at the final stage of screw tightening, the relative displacement in the rotational direction between the drive shaft 52 and the hammer 54 is reduced. Will occur. This relative displacement acts to move the steel ball 53 against the urging force of the compression spring 55 between the steel ball holding recess 521 and the guide groove 541. As a result, the hammer 54 moves backward relative to the drive shaft 52, and the hitting piece 545 that has been in contact with the hitting arm 565 so far is detached from the hitting arm 565. As described above, when the hitting piece portion 545 is detached from the hitting arm portion 565, the hammer 54 is idled instantaneously. However, the hitting piece portion 545 receives the urging force of the compression spring 55 and again hits the hitting arm portion 565. Become. The hitting of the hitting piece portion 545 against the hitting arm portion 565 acts as a hitting force in the rotation direction applied to the rotating operation of the anvil 56. By repeatedly engaging and disengaging the hammering piece 545 of the hammer 54 with respect to the hammering arm 565 of the anvil 56, a striking force in the screw tightening direction is repeatedly applied to the anvil 56 and thus the bit B, thereby tightening the screw. Can be tightened.

  The rear cover member 60 will be described with reference to FIGS. The rear cover member 60 is assembled to the rear end of the motor housing portion 31. The rear cover member 60 corresponds to a rear cover according to the present invention. The rear cover member 60 is formed by integrally connecting a cap body 61, a left peripheral wall portion 65, and a right peripheral wall portion 75. The cap body 61 is configured in the same manner as a cap member that has been conventionally used, and closes the opening end 311 of the motor housing portion 31 described above. The cap body 61 assembled to the motor housing portion 31 forms a part of the housing structure together with the motor housing portion 31. The cap body 61 is a member different from the motor housing portion 31 and corresponds to another housing member according to the present invention assembled to the motor housing portion 31. The cap body 61 corresponds to a cover body according to the present invention that is assembled to the rear portion of the motor housing portion 31.

  The cap body 61 includes a rear end wall 62 disposed as the rearmost part of the motor housing portion 31 and an outer ring portion 63 protruding slightly forward from the outer peripheral edge of the rear end wall 62. When viewed from the front, the rear end wall 62 is formed in a substantially circular shape with a lower portion partially cut away. The outer ring portion 63 has a shape protruding forward from the outer peripheral edge of the rear end wall 62. Retaining holes 621 and 622 for inserting male screws are provided on the left and right sides of the rear end wall 62. The retaining holes 621 and 622 allow a male screw (not shown) inserted through the front and rear to be inserted into a female screw (not shown) provided in the motor housing portion 31. The rear cover member 60 is integrated with the housing 14 forming the motor housing portion 31 by the screwing of the male screw.

  Six exhaust openings 381, 381, 381,... Are arranged on the left and right peripheral surfaces of the outer ring portion 63, respectively. The exhaust opening 381 communicates with the outside of the housing 14 so that exhaust can be performed. The exhaust opening 381 passes through the motor shaft 35 in the rotational radial direction and is disposed so as to face the outer peripheral portion of the fan 36. The cooling air after cooling the brushless motor 33 by the rotation of the fan 36 is smoothly exhausted to the outside through the exhaust opening 381. On the left side of the outer ring portion 63, a left peripheral wall portion 65 protruding to the front side is connected. A right peripheral wall 75 projecting forward is also connected to the right side of the outer ring portion 63. Thus, the left peripheral wall portion 65 and the right peripheral wall portion 75 that are provided in a pair on the left and right sides with respect to the cap body 61 constitute a part of the rear cover member 60. That is, the left peripheral wall portion 65 and the right peripheral wall portion 75 are formed integrally with the cap body 61 that forms another housing member with the housing 14 to form the rear cover member 60.

  The left peripheral wall portion 65 and the right peripheral wall portion 75 correspond to the outer peripheral portion according to the present invention. That is, the left peripheral wall portion 65 and the right peripheral wall portion 75 are arranged as members different from the motor housing portion 31 in the outer peripheral range of the side portion of the motor housing portion 31. The left peripheral wall portion 65 and the right peripheral wall portion 75 are disposed so as to cover the outer peripheral surface 310 of the motor housing portion 31. The outer peripheral surface 310 of the motor housing portion 31 corresponds to the outer peripheral range of the motor housing portion 31. That is, the left outer peripheral surface 66 of the left peripheral wall portion 65 is set in a range that extends radially outward from the outer peripheral surface 310 that forms the outer peripheral range of the motor housing portion 31. Further, the right outer peripheral surface 76 of the right peripheral wall portion 75 is also set to a range beyond the outer peripheral surface 310 that forms the outer peripheral range of the motor housing portion 31 to the outside in the radial direction. That is, the left outer peripheral surface 66 of the left peripheral wall portion 65 and the right outer peripheral surface 76 of the right peripheral wall portion 75 extend to a range exceeding the outer peripheral range of the outer peripheral surface 310 of the motor housing portion 31. A left peripheral wall portion 65 and a right peripheral wall portion 75 as outer peripheral portions different from the motor housing portion 31 are arranged on the side portion of the motor housing portion 31.

  The left peripheral wall portion 65 and the right peripheral wall portion 75 are formed in a shape that is bilaterally symmetric with respect to the upper and lower front and rear planes including the axis of the motor shaft 35. The left peripheral wall portion 65 and the right peripheral wall portion 75 are formed in a pair shape that is point-symmetric when viewed in the axial direction of the motor shaft 35. That is, the left peripheral wall portion 65 and the right peripheral wall portion 75 are formed in symmetrical shapes although the left and right arrangement positions are different. Therefore, in describing the left peripheral wall portion 65 and the right peripheral wall portion 75, only the left peripheral wall portion 65 will be described as a representative with reference to FIG. Reference numerals similar to those in FIG. In addition, about the shape which corresponds to the left side wall part 65 in the right side wall part 75, the code | symbol which an end is the same number is attached | subjected to drawing, and description is abbreviate | omitted.

  The left peripheral wall portion 65 includes a connecting rear portion 651, a first range portion 653, a second range portion 655, and a locking front portion 657 in order from the rear to the front. The connecting rear portion 651, the first range portion 653, the second range portion 655, and the locking front portion 657 are integrally formed. The connected rear part 651 is provided adjacent to the range of the outer ring part 63 in which the exhaust openings 381 are provided side by side. The connecting rear part 651 is formed so as to expand outward in the radial direction from the outer ring part 63. For this reason, the first range portion 653 and the second range portion 655 that extend straight from the connecting rear portion 651 to the front side are disposed so as to cover the outer peripheral surface 310 of the motor housing portion 31. The first range portion 653 has a rear portion connected to the connected rear portion 651 and a front portion connected to the second range portion 655.

  The first range portion 653 is formed in a tapered shape in which the vertical width is gradually shortened from the rear to the front. As shown in FIG. 2, the first range portion 653 extends from the connected rear portion 651 to a screw fastening portion (reference numerals 121 (12) and 122 (12)) at a substantially intermediate position of the motor housing portion 31. On the other hand, the second range portion 653 extends to the front side from the screw fastening portion (illustrated reference numerals 121 (12), 122 (12)) at the substantially intermediate position. Incidentally, the first range portion 653 is selected to have a tapered shape so that the screw fastening portion (indicated by reference numerals 121 (12) and 122 (12)) at the substantially intermediate position can be exposed to the outside. The second range portion 655 is also formed in a tapered shape in which the vertical width gradually decreases gradually from the rear to the front.

  The tapered inclination angle of the second range portion 655 is gentler than the tapered inclination angle of the first range portion 653. The second range portion 655 extends from the front side of the screw fastening portion (illustrated reference numerals 121 (12), 122 (12)) at a substantially intermediate position to a range extending to the outer peripheral side of the hammer portion 40. Each of the first range portion 653 and the second range portion 655 has a tapered inclination angle that is vertically symmetrical with respect to the output axis X1 (see FIG. 2 and the like) at the upper and lower intermediate positions. A locking front portion 657 is provided at the front end of the second range portion 655. The locking front portion 657 has a locking claw portion 658. The locking claw portion 658 is provided so as to be locked in the locking recess 733 of the hammer case cover 70. When the locking claw 658 is locked to the locking recess 733, the left peripheral wall 65 is supported by the cap body 61 on the rear side and supported by the hammer case cover 70 on the front side.

  The outer peripheral surfaces of the first range portion 653 and the second range portion 655 are smoothly connected to form the left outer peripheral surface 66. The left outer peripheral surface 66 is an outer peripheral surface set on the outer side (outer peripheral side) in the radial direction than the outer peripheral surface 310 of the motor housing portion 31. This left outer peripheral surface 66 also has a curved peripheral surface shape similar to the outer peripheral surface 310. Here, the left outer peripheral surface 66 is provided with a logo display portion 67 for displaying the manufacturer of the impact driver 10 by integral molding. The logo display part 67 is formed integrally with the left peripheral wall part 65. The logo display portions 67, 67, 67 are formed integrally with the left outer peripheral surface 66 in a three-dimensional shape slightly protruding radially outward from the left outer peripheral surface 66. The logo display portion 67 is colored differently from the normal coloring of the left outer peripheral surface 66 so that it can be easily seen from the outside. For example, the normal coloring of the left outer peripheral surface 66 is green, while the coloring of the logo display portion 67 is white. If the logo display portion 67 is colored differently from the normal coloring of the left outer peripheral surface 66, the logo display portion 67 is displayed as if it is raised, and the logo display portion 67 is easily visible. Can be increased.

  Even in the right peripheral wall portion 75, it is configured in the same manner as the left peripheral wall portion 65 as described above. That is, the outer peripheral surfaces of the first range portion 753 and the second range portion 755 are also smoothly connected to form the right outer peripheral surface 76. The right outer peripheral surface 76 is also an outer peripheral surface set on the outer side in the radial direction (outer peripheral side) than the outer peripheral surface 310 of the motor housing portion 31. The right outer peripheral surface 76 also has a curved peripheral surface shape similar to the left outer peripheral surface 66. Here, as can be seen by comparing FIG. 5 and FIG. 6, a name label 77 for displaying product information of the impact driver 10 is attached to the right outer peripheral surface 76. This name label 77 is an identification seal. This name label 77 corresponds to a product information display section according to the present invention. The name label 77 includes product information such as a model name, model number, rated voltage, rated current, manufacturing date, manufacturing number, and notes. That is, the product information display part is provided on the right outer peripheral surface 76 by pasting the name label 77 on the right outer peripheral surface 76. The name label 77 has a size that fits within the right outer peripheral surface 76, and the size of characters that allow easy viewing of product information to be described is selected. The name label 77 has product information written on the front surface, and the back surface is a pasting surface. The logo display part 67 and the name label 77 correspond to the display part according to the present invention.

  In the left peripheral wall portion 65 and the right peripheral wall portion 75, when the rear cover member 60 is assembled to the motor housing portion 31, a ventilation gap S <b> 1 is generated between the motor housing portion 31 and the outer peripheral surface 310. Is formed. The gap S1 is a ventilation gap set between the outer peripheral surface 310 of the motor housing portion 31 and the inner peripheral surface 659 of the left peripheral wall portion 65 (the inner peripheral surface 759 of the right peripheral wall portion 75). This gap S1 is externally provided between the outer peripheral surface 310 of the motor housing portion 31 and the inner peripheral surface 659 of the left peripheral wall portion 65 (the inner peripheral surface 759 of the right peripheral wall portion 75) through the vertical communication portions S2 and S3. Inhalation is possible. From the gap S1 and the communication portions S2 and S3 set in this way, it is possible to preferably take outside air from the intake opening 382. That is, the left peripheral wall portion 65 and the right peripheral wall portion 75 are arranged so as to cover the intake opening 382 so as to allow ventilation.

  According to the impact driver 10 of the first embodiment described above, the left peripheral wall 65 and the right peripheral wall 75 different from the motor housing 31 are arranged on the left and right sides of the motor housing 31. . Thereby, the logo display part 67 and the name label 77 which can be visually recognized to the range beyond the outer periphery range of the motor housing part 31 can be provided. As a result, even when the motor housing portion 31 is downsized and the outer peripheral range of the motor housing portion 31 is narrowed, the logo display portion 67 as a display portion or the like is displayed at a location different from the outer periphery of the motor housing portion 31. A name label 77 can be provided. Therefore, even in the impact driver 10 in which the motor housing portion 31 is reduced in size, the user can easily view the display contents regarding the manufacturer and product information.

  Further, according to the impact driver 10 of the first embodiment described above, the left peripheral wall portion 65 and the right peripheral wall portion 75 are arranged so as to cover the outer peripheral surface 310 of the motor housing portion 31, so that the motor housing portion The visible logo display part 67 and the name label 77 can be provided without changing the housing configuration including 31. Further, according to the impact driver 10 of the first embodiment described above, the left peripheral wall portion 65 and the right peripheral wall portion 75 are formed integrally with the cap body 61 assembled to the motor housing portion 31, so the number of parts is reduced. This can be suppressed and is advantageous for manufacturing. Further, when the left peripheral wall portion 65 and the right peripheral wall portion 75 are provided in this manner, the left peripheral wall portion 65 and the right peripheral wall portion 75 can be assembled to the motor housing portion 31 simultaneously with the assembly of the cap body 61.

  Further, according to the impact driver 10 of the first embodiment described above, since the logo display portion 67 is provided on the outer peripheral surface 66 of the left peripheral wall portion 65, the user visually recognizes the provided logo display portion 67. can do. Further, according to the impact driver 10 of the first embodiment described above, the name label 77 is affixed to the right outer peripheral surface 76 of the right peripheral wall portion 75. The name label 77 includes product information such as model name, model number, rated voltage, rated current, manufacturing date, manufacturing number, precautions, etc., so that the user visually recognizes the product information. be able to. Further, according to the impact driver 10 of the first embodiment described above, the left peripheral wall portion 65 and the right peripheral wall portion 75 are arranged so as to cover the intake opening portion 382, so that the opening of the intake opening portion 382 is opened. The outer peripheral surfaces 66 and 76 can be formed up to the range, and the ranges of the outer peripheral surfaces 66 and 76 of the left peripheral wall portion 65 and the right peripheral wall portion 75 can be expanded.

  Further, the left peripheral wall portion 65 and the right peripheral wall portion 75 cover the outer peripheral side of the intake opening 382 so as to cover the plurality of intake openings 382 described above. That is, when the outside air is sucked from the intake opening 382, as shown in FIG. 3, the ventilation gap S1 between the outer peripheral surface 310 of the motor housing part 31 and the ventilation gap S1 are set vertically. Outside air is sucked through the communicating portions S2 and S3 that communicate with each other. That is, outside air is sucked into the intake opening 382 through the illustrated labyrinth structure (S1, S2, S3), and the dustproof and waterproof effect during intake can be enhanced. Thus, when the dustproof waterproof effect at the time of intake is enhanced, the size of the intake opening 382 can be made larger than usual and the cooling efficiency of the brushless motor 33 can be improved. .

[Second Embodiment]
Next, a second embodiment, which is a modification of the first embodiment, will be described with reference to FIGS. The external perspective view of FIG. 11 shows an impact driver 10A of the second embodiment. The side view of FIG. 12 is a right side view of the impact driver 10A of FIG. The cross-sectional view of FIG. 13 shows the (XIII)-(XIII) cross-sectional view of FIG. The right perspective view of FIG. 14 shows the peripheral wall covers 65A and 75A removed. In the second embodiment, the configuration of the outer peripheral portion (peripheral wall covers 65A and 75A) is mainly different from the first embodiment described above. For this reason, in this 2nd Embodiment, the same code | symbol as the above shall be described in drawing in the part comprised the same as 1st Embodiment, and the description shall be abbreviate | omitted.

  In the second embodiment, the left peripheral wall portion 65 and the right peripheral wall portion 75 are separated from the cap body 61 to form peripheral wall covers 65A and 75A. Further, the rear cover member 60 </ b> A has only the cap body 61 separated from the left peripheral wall portion 65 and the right peripheral wall portion 75. Further, the hammer case cover 70 has a slim structure in which the left locking side portion 73 and the right locking side portion 74 are removed. A left peripheral wall cover 65A is detachably attached to the left outer periphery of the motor housing 31. The external shape of the left peripheral wall cover 65A is substantially the same as the external shape of the left peripheral wall portion 65 described above. A right peripheral wall cover 75A is detachably attached to the right outer periphery of the motor housing portion 31. The external shape of the right peripheral wall cover 75A is substantially the same as the external shape of the right peripheral wall portion 75 described above. The left peripheral wall cover 65 </ b> A and the right peripheral wall cover 75 </ b> A are detachably attached to the outer peripheral surface 310 of the motor housing portion 31 by concavo-convex fitting.

  Specifically, three fitting pin portions 68A are provided on the back surface of the left peripheral wall cover 65A shown in FIG. The three fitting pin portions 68 </ b> A are configured to be able to fit in fitting holes (not shown) provided on the outer peripheral surface 310 of the motor housing portion 31. When the fitting pin portion 68A is fitted into the fitting hole portion, the left peripheral wall cover 65A is attached to the outer peripheral surface 310 of the motor housing portion 31. The right peripheral wall cover 75A is also provided with a fitting pin portion (not shown) similar to the left peripheral wall cover 65A, and can be attached to the outer peripheral surface 310 of the motor housing portion 31.

  Even in the left peripheral wall cover 65A and the right peripheral wall cover 75A attached in this way, the above-described gap S1 and communication portions S2 and S3 are provided. By providing the gap S1 and the communication portions S2 and S3, it is possible to preferably inhale air from the outside through the intake opening 382. Even in the left peripheral wall cover 65A and the right peripheral wall cover 75A of the second embodiment, the left outer peripheral surface 66 and the right outer peripheral surface 76 that are the same as the left peripheral wall portion 65 and the right peripheral wall portion 75 of the first embodiment. Have For this reason, the reference numerals used in describing the first embodiment are attached to the drawings, and the description thereof is omitted. That is, as in the first embodiment, the left outer peripheral surface 66 is provided with a logo display portion 67 that displays the manufacturer, and the right outer peripheral surface 76 has a name label 77 that displays appropriate product information. It is pasted.

  Even in the impact driver 10A having such a left peripheral wall cover 65A and a right peripheral wall cover 75A, the same operational effects as the impact driver 10 of the first embodiment described above can be obtained. Further, in the impact driver 10A of the second embodiment, the left peripheral wall cover 65A and the right peripheral wall cover 75A can be attached and detached. Therefore, when the impact driver 10A is desired to be used in a narrow place, the left peripheral wall cover It is possible to remove the 65A and the right peripheral wall cover 75A so that the slim shape is easy to work with. When the left peripheral wall cover 65A and the right peripheral wall cover 75A are attached, the motor housing portion 31 can be protected.

[Third Embodiment]
Next, a third embodiment different from the first and second embodiments will be described with reference to FIGS. The external perspective view of FIG. 15 shows an impact driver 10B of the third embodiment. The side view of FIG. 16 is a left side view of the impact driver 10B of FIG. The external perspective view of FIG. 17 shows the hammer case 80 as a single item. The side view of FIG. 18 is a left side view of the hammer case 80 of FIG. The impact driver 10B of the third embodiment is different from the first and second embodiments, and is different in that an outer peripheral portion according to the present invention is provided in the hammer case 80. The illustrated impact driver 10B is configured to be different in each part as compared with the impact driver 10 of FIG. For this reason, parts that function in the same manner as in the first embodiment will be denoted by the same reference numerals as those described above, and description thereof will be omitted.

  The hammer case 80 corresponds to a housing member according to the present invention, and corresponds to a mechanism case assembled to the front portion of the motor housing portion 31. The hammer case 80 is configured as a metal case of the above-described hammer portion 40 and is assembled and fixed to the front portion of the motor housing portion 31. As shown in FIGS. 17 and 18, the hammer case 80 is formed in a substantially cup shape with the front end penetrating the anvil 56 so as to protrude. The hammer case 80 includes a bearing box support portion 81, a hammer accommodating portion 82, and an anvil support portion 83 in order from the rear. The bearing box support part 81 accommodates and supports the bearing box 50 inside. The bearing box 50 accommodates and supports the speed reduction mechanism 41 described above.

  The hammer accommodating portion 82 accommodates and supports the hitting mechanism 51 described above. The anvil support portion 83 is set at the front portion of the hammer case 80. The anvil support portion 83 rotatably supports the anvil 56 with a needle bearing 563 held therein. A bumper holding portion 84 is provided on the outer peripheral side of the anvil support portion 83. The bumper holding portion 84 has an outer peripheral shape for supporting the bumper 97 as shown in FIGS. 15 and 16. The bumper holding portion 84 is formed corresponding to the inner peripheral shape of the bumper 97. Incidentally, the bumper 97 is made of a resin made of elastically deformable rubber or the like, and relieves an impact when the front portion of the impact driver 10B collides with the outside.

  The external shape of the hammer case 80 that accommodates and supports each mechanism is roughly divided into a accommodated portion 85, an external exposed portion 87, and a rearward extending portion 90. The accommodated portion 85 has a housing structure that is accommodated inside the motor housing portion 31. The accommodated portion 85 is formed corresponding to the front shape of the motor housing portion 31. The external exposed portion 87 has an outer peripheral surface 88 that is exposed to the outside unlike the accommodated portion 85. The outer peripheral surface 88 is formed in a shape continuous with the outer peripheral surface 310 of the assembled motor housing portion 31. Although only the left side can be seen in the figure, the rear extension 90 is provided on each of the left and right sides of the hammer case 80. The rearward extending portion 90 corresponds to the outer peripheral portion according to the present invention. The rearward extending portion 90 is located at a substantially central position (left and right vertex positions) on both the left and right circumferential surfaces. The external exposed portion 87 is formed with an upper peripheral edge 891 whose upper portion extends in the circumferential direction, whereas the left and right side portions are formed with inclined peripheral edges 892 that are inclined forward as approaching the rearward extending portion 90.

  The rearward extending portion 90 has a shape protruding rearward from the external exposed portion 87. The rear extending portion 90 has a rectangular shape that extends in the front-rear direction and continues to the external exposed portion 87. The rearward extending portion 90 has a shape protruding slightly outward from the outer peripheral surface 310 of the assembled motor housing portion 31. The rear extending portion 90 also has an outer surface 91 that is exposed to the outside in the same manner as the outer exposed portion 87. The outer surface 91 is extended in the front-rear direction. The front half of the outer surface 91 is a surface that inclines toward the inner anvil 56 arrangement side toward the front side. The rear half of the outer surface 91 has a planar shape extending in the front / rear upper / lower plane.

  A logo seal 95 is pasted on the left outer surface 91 shown in the figure. The logo seal 95 corresponds to a logo display portion according to the present invention. Note that a logo display shape equivalent to the logo seal 95 may be integrally formed with the rearward extending portion 90 on the outer surface 91. The logo sticker 95 displays the logo display part of the manufacturer of the impact driver 10B substantially the same as the logo display part 67 provided on the left outer peripheral surface 66 described above. That is, the outer surface 91 of the rearward extending portion 90 can function as a display unit that displays the product manufacturer and product information of the product, like the left outer peripheral surface 66 and the right outer peripheral surface 76 described above. Incidentally, the name label 77 may be affixed instead of the logo sticker 95.

  As shown in FIG. 15, the front opening end 312 of the motor housing portion 31 is formed corresponding to the edge shape of the externally exposed portion 87 and the rearward extending portion 90 described above. Specifically, the front opening end 312 has a shape corresponding to the upper peripheral edge 891 and the inclined peripheral edge 892 of the external exposed portion 87 and a concave shape into which the rearward extending portion 90 is inserted. That is, the upper part of the front opening end 312 has an upper peripheral edge 391 with which the upper peripheral edge 891 abuts when the hammer case 80 is assembled. The left and right sides of the front opening end 312 have inclined peripheral edges 392 against which the inclined peripheral edges 892 come into contact when the hammer case 80 is assembled.

  On both the left and right sides of the front opening end 312, concave portions 393 into which the rearward extending portions 90 of the hammer case 80 are inserted when the hammer case 80 is assembled are provided. The recessed portion 393 has a shape corresponding to the rearward extending portion 90, and has a shape cut out by a rectangle extending in the front-rear direction. Further, an edge portion 395 protruding outward is provided on the periphery of the concave portion 393. The concave portion 393 corresponds to a notch according to the present invention. The concave portion 393 is provided so as to partially cut out the outer peripheral range of the motor housing portion 31. When the hammer case 80 is assembled to the motor housing portion 31, the recessed portion 393 is arranged so that the rearward extending portion 90 enters. Here, the rearward extending portion 90 of the hammer case 80 is fitted to the concave portion 393 of the motor housing portion 31 so as to slide from the front to the rear. That is, the rearward extending portion 90 is fitted to the concave portion 393 in the front-rear direction that is the rotation restricting direction. Such fitting acts to restrict relative rotation of the hammer case 80 with respect to the motor housing portion 31. That is, the rearward extending portion 90 displaying the logo also serves as an anti-rotation action of the hammer case 80 with respect to the motor housing portion 31.

  Even in the impact driver 10B having such a rearward extension 90, the same operational effects as the impact driver 10 of the first embodiment described above can be achieved. That is, according to the impact driver 10 </ b> B of the third embodiment, the rear extending portion 90 different from the motor housing portion 31 is disposed in the outer peripheral range of the motor housing portion 31. Here, since the outer surface 91 of the rear extension 90 extends to a front range that exceeds the outer peripheral range of the motor housing portion 31, a logo seal 95 that can be identified to a front range that exceeds the outer peripheral range of the motor housing portion 31. A display unit such as a name label 77 can be provided. Thereby, even when the motor housing portion 31 is downsized and the outer peripheral range of the motor housing portion 31 is narrowed, the logo seal 95 can be visually recognized. Therefore, even if the impact driver 10B is downsized, the manufacturer of the product and the product information of the product described on the outer surface of the impact driver 10B can be easily seen by the user.

  Further, according to the impact driver 10B of the third embodiment described above, the rearward extending portion 90 is provided in the hammer case 80 assembled to the front portion of the motor housing portion 31, and therefore, simultaneously with the assembly of the hammer case 80. The rear extension 90 can be assembled. Further, according to the impact driver 10B of the third embodiment described above, the rearward extending portion 90 is disposed so as to enter the recessed portion 393 provided in the motor housing portion 31, and therefore, the rearward extending portion 90. The outer periphery dimension when arrange | positioning can be suppressed. Further, according to the impact driver 10B of the above-described third embodiment, the logo sticker 95 is attached to the outer surface 91 of the left rear extension 90, so that the user can display the attached logo display. It can be visually recognized. Further, the rearward extending portion 90 displaying the logo is disposed behind the bumper holding portion 84 and in front of the bearing box support portion 81, so that the rearward extending portion 90 is disposed on the front side and visually recognized while being hardly damaged from the outside. Excellent in properties.

  Note that the rearward extension 90 of the third embodiment is provided integrally with the hammer case 80. However, the rear extension 90 may be provided integrally with the hammer case cover 70 described in the first and second embodiments. Incidentally, the impact driver 10B of the third embodiment is not provided with the hammer case cover 70, unlike the first and second embodiments described above. The hammer case cover 70 corresponds to a case cover according to the present invention. When the rear extension 90 is provided on the hammer case cover 70 as described above, the rear extension 90 can be easily assembled simultaneously with the assembly of the hammer case cover 70, and the rear extension 90 is also simple. Moreover, it can be molded at low cost.

  Further, the rotary tool according to the present invention is not limited to the above-described embodiment, and can be configured with appropriate modifications. For example, in the above-described embodiment, the impact driver 10 is described as an example of the rotary tool. However, the rotary tool according to the present invention may be configured with an impact wrench, a driver drill, a hammer drill, or the like, and can select an electric tool that generates an appropriate rotation or rotation hit. it can. In that case, the power transmission mechanism is not limited to the above-described embodiment, and an appropriate mechanism can be adopted. Further, the power transmission mechanism may be configured with a plurality of mechanisms, and may be configured as a mechanism case divided into a plurality of parts.

10, 10A, 10B Impact driver (rotary tool, rotary impact tool)
DESCRIPTION OF SYMBOLS 11 Tool main body 12 Screw fastening location 13 Battery mounting part 131 Terminal 132 Locking structure 133 Controller 14 Housing 15 Left side divided housing 16 Right side divided housing 17 Operation display part 18 Strap member 19 Hook member 20 Grip part 21 Grip housing part 22 Operation switch 23 Switch body 24 Trigger member 25 Switching knob 26 LED irradiation device 30 Motor unit 31 Motor housing unit 310 Outer peripheral surface 311 Open end 312 Front open end 33 Brushless motor 331 Rotor 332 Permanent magnet 333 Stator 334 Coil 335 Sensor substrate 35 Motor shaft 351 Front side Bearing 352 Rear bearing 36 Fan 37 Input gear 381 Exhaust opening 382 Intake opening (vent hole)
391 Upper peripheral edge 392 Inclined peripheral edge 393 Concave part (notch part)
395 Edge portion 40 Hammer portion 41 Reduction mechanism (power transmission mechanism, output portion)
42 planetary gear 45 internal gear 46 support shaft 47 carrier 48 bearing 49 retaining ring 50 bearing box 51 striking mechanism (power transmission mechanism, output part)
52 Drive shaft 521 Steel ball holding recess 53 Steel ball 54 Hammer 541 Guide groove 543 Housing recess 545 Strike piece 55 Compression spring 551 Steel ball 553 Washer 56 Anvil (output shaft)
561 Anvil body 562 Interior 563 Needle bearing 565 Strike arm portion 569 Receiving recess 57 Bit holding mechanism 58 Hammer case 59 Locked portion 60, 60A Rear cover member (rear cover)
61 Cap body (other housing member, cover body)
61A Cap member 62 Rear end walls 621, 622 Retaining hole 63 Outer ring part 64 Locking member 65 Left peripheral wall part (outer peripheral part)
65A Left side wall cover (outer part)
651 Connection rear portion 653 First range portion 655 Second range portion 657 Locking front portion 658 Locking claw portion 659 Inner peripheral surface 66 Left outer peripheral surface 67 Logo display portion 68A Fitting pin portion 70 Hammer case cover 71 Front end portion 72 Cover body 73 left locking side 74 right locking side 733, 743 locking recess 735, 745 outer peripheral surface 75 right peripheral wall (outer peripheral)
75A Right side wall cover (outer periphery)
751 Articulated rear portion 753 First range portion 755 Second range portion 757 Locking front portion 758 Locking claw portion 759 Inner peripheral surface 76 Right outer peripheral surface 77 Name label (identification seal)
80 Hammer case (other housing members, mechanism case)
81 Bearing box support portion 82 Hammer receiving portion 83 Anvil support portion 84 Bumper holding portion 85 Received portion 87 External exposed portion 88 Outer peripheral surface 891 Upper peripheral edge 892 Inclined peripheral edge 90 Rear extending portion 91 Outer surface 95 Logo seal 97 Bumper 100 Batteries 100 Battery 101 Unlock Button B Bit S1 Clearance S2, S3 Communication part X1 Output axis

Claims (13)

A resin motor housing for housing the motor;
A grip housing disposed integrally with the motor housing and below the motor housing;
An output unit driven by the motor and disposed in front of the motor;
A rotating tool in which an outer peripheral portion different from the motor housing is disposed on a side portion of the motor housing. The rotary tool according to claim 1, wherein
The rotary tool is disposed so that the outer peripheral portion covers the outer peripheral surface of the motor housing. The rotary tool according to claim 1, wherein
The motor housing is provided with a notch that partially cuts the outer peripheral range of the motor housing,
The outer peripheral part is a rotary tool arranged so as to enter the notch part. In the rotary tool according to claim 2 or claim 3,
The outer peripheral portion is a rotary tool formed integrally with another housing member assembled to the motor housing. The rotary tool according to claim 4, wherein
The housing member is a rotating tool that is a cover body assembled to a rear portion of the motor housing. The rotary tool according to claim 4, wherein
The housing member is a rotary tool which is a mechanism case assembled to a front portion of the motor housing. The rotary tool according to claim 4, wherein
The housing member is a rotary tool, which is a case cover of a mechanism case assembled to a front portion of the motor housing. The rotary tool according to any one of claims 1 to 7,
The motor housing is provided with a vent hole that communicates the inside and the outside.
The outer peripheral portion is a rotary tool arranged so as to cover the vent hole so as to allow ventilation. The rotary tool according to any one of claims 1 to 8,
A rotary tool provided with a logo display part on an outer peripheral surface of the outer peripheral part. The rotary tool according to any one of claims 1 to 8,
A rotary tool provided with a product information display part on an outer peripheral surface of the outer peripheral part. A resin motor housing for housing the motor;
A grip housing integrally with the motor housing and disposed below the motor housing;
A metal case fixed to the motor housing and disposed in front of the motor housing;
An output unit driven by the motor and supported by the case;
A rotary tool having a logo display portion formed on the case. The rotary tool according to claim 11, wherein
A bumper holding part for supporting the bumper is formed at the front part of the case,
A bearing box for supporting a bearing for supporting the shaft of the motor;
A rear part of the case has a bearing box support part for supporting the bearing box,
The logo display part is a rotary tool arranged behind the bumper holding part and in front of the bearing box support part. The rotary tool according to claim 11, wherein
The logo display unit is a rotary tool that is fitted to the motor housing in a rotation restricting direction.

Images