WO2017110229A1 - Rotary tool - Google Patents
Rotary tool Download PDFInfo
- Publication number
- WO2017110229A1 WO2017110229A1 PCT/JP2016/081309 JP2016081309W WO2017110229A1 WO 2017110229 A1 WO2017110229 A1 WO 2017110229A1 JP 2016081309 W JP2016081309 W JP 2016081309W WO 2017110229 A1 WO2017110229 A1 WO 2017110229A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- case
- rotary tool
- motor
- power transmission
- hammer
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
Definitions
- the present invention relates to a rotary tool that rotates an output shaft.
- a rotary tool represented by an impact driver is known (see Japanese Patent Application Laid-Open No. 2014-140909).
- This type of rotary tool incorporates a motor as a drive source.
- the motor rotates the motor shaft.
- the motor shaft inputs rotational driving force to the striking mechanism via the speed reduction mechanism.
- the input striking mechanism includes a hammer that rotates by receiving a rotational drive, and an anvil that rotates by receiving the rotational drive of the hammer.
- a torque of a predetermined value or more is applied from the outside to the rotation operation of the output shaft, the hammering mechanism is disengaged from the anvil and idles.
- the spinning hammer strikes the anvil in the rotational direction, and the striking force is applied to the rotation operation of the output shaft.
- Such a striking mechanism is housed in the hammer case.
- the hammer case is screwed to the housing that houses the motor via a male screw.
- the male screw is disposed in the axial direction (front-rear direction) in which the output shaft extends on the outer peripheral side, and the hammer case is screwed to the housing.
- several screwing points for screwing are provided on the outer periphery of the hammer case.
- Such a screwing portion has a structure in which at least the length of the screw protrudes outward from the outer periphery of the hammer case, and the outer periphery of the hammer case becomes larger due to the protrusion. If it does so, there exists a point out that handling when this rotary tool is used in a narrow place will worsen.
- the present invention has been made in view of such circumstances, and the problem to be solved by the present invention is to rotate the output shaft and apply a torque of a predetermined value or more to the rotation operation from the outside.
- a rotating tool that applies a striking force in the direction of rotation is to improve the handling efficiency even when used in a narrow place.
- the rotary tool according to the present invention takes the following means.
- a rotary tool is a rotary tool that rotates an output shaft, and includes a motor, a motor housing that houses the motor, and power that transmits a driving force of the motor to the output shaft.
- the case that includes the transmission mechanism and includes the power transmission mechanism is provided with a holding portion that holds an insertion member that is inserted in a direction intersecting the axial direction of the output shaft.
- the insertion member that allows the insertion member to be inserted is provided, and the insertion member held by the holding portion while being inserted into the insertion portion is moved relative to the case with respect to the case. It is the structure of regulating.
- the insertion member held by the holding portion while being inserted into the insertion portion can regulate the relative movement of the motor housing with respect to the case.
- a member for restricting the relative movement such as a male screw in the axial direction in which the output shaft extends as in the prior art. It is possible to reduce the thickness of the parts that have been used. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
- a rotary tool according to a second aspect of the present invention is the rotary tool according to the first aspect, wherein the case has a front case and a rear case separated in an output direction, and the holding portion is the rear portion. It is the structure of being provided in a case.
- the holding part is provided in the rear case separated in the output direction, the holding part can be provided while slimming the front part of the case. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
- a rotary tool is a rotary tool that rotates an output shaft, and includes a motor, a motor housing that houses the motor, and power that transmits the driving force of the motor to the output shaft.
- a case that includes the transmission mechanism and includes the power transmission mechanism includes a front case and a rear case that are separated in an output direction, and one of the front case and the rear case includes the front case and the rear case.
- a holding portion that holds an insertion member that is inserted in a direction intersecting the axial direction of the output shaft is provided, and the insertion member can be inserted into one of the front case and the rear case. And the insertion member held by the holding portion while being inserted into the insertion portion regulates relative movement of the other case with respect to the one case. is there
- the insertion member held by the holding portion while being inserted into the insertion portion can regulate the relative movement of the other case with respect to the one case.
- a member that restricts relative movement such as a male screw in the axial direction in which the output shaft extends, It is possible to reduce the thickness of the arranged member portions. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
- the rotary tool according to a fourth aspect of the present invention is the rotary tool according to the third aspect, wherein the power transmission mechanism has a power transmission member for transmitting power, and the rear case supports the power transmission member. It is the structure of having the support part to do.
- the rear case has the support portion that supports the power transmission member that transmits power, so that the front case can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
- a rotary tool according to a fifth aspect of the present invention is the rotary tool according to the third or fourth aspect, wherein the power transmission mechanism has a speed reduction mechanism, and the speed reduction mechanism is incorporated in the rear case. This is a configuration.
- the speed reduction mechanism is built in the rear case, the front case can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
- a rotary tool according to a sixth invention of the present invention is the rotary tool according to any one of the third to fifth inventions, wherein the power transmission mechanism has a striking mechanism that applies a striking force to a rotating operation,
- the front case is configured such that the striking mechanism is internally provided.
- the rotary tool according to the sixth aspect of the present invention since the front case is equipped with a striking mechanism that applies striking force to the rotating operation, the striking force can be efficiently transmitted to the output shaft. As a result, the mechanism can be simplified and the entire tool can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
- a rotary tool according to a seventh aspect of the present invention is the rotary tool according to any one of the third to sixth aspects, wherein the motor housing is fastened together with the holding portion via the insertion member. This is the configuration.
- the motor housing since the motor housing is fastened together with the holding portion via the insertion member, the motor housing can be assembled at the same time. As a result, when assembling the motor housing, it can also be used as an insertion member when assembling the case, reducing the number of assembling members, making the product slim, and improving the handling efficiency. Can do.
- a rotary tool according to an eighth invention of the present invention is the rotary tool according to any one of the first to seventh inventions, wherein the holding portion is formed by a female screw, and the insertion member is connected to the female screw. This is a male screw that can be screwed together.
- the holding portion is formed by a female screw and the insertion member is a male screw that can be screwed with the female screw, the holding of the insertion member with respect to the holding portion is performed by screwing. Will be made.
- the holding of the insertion member with respect to the holding portion is ensured by screwing, and the screw fastening member can be abolished, the number of members to be assembled is reduced, the product is slimmed, and the handling is further performed. The goodness of the can be improved.
- a rotary tool is a rotary tool that rotates an output shaft, and includes a motor, a motor housing that houses the motor, and power that transmits the driving force of the motor to the output shaft.
- a case that includes the transmission mechanism and that includes the power transmission mechanism includes a front case and a rear case that are separated in an output direction, and each of the front case and the rear case includes the output shaft. It is the structure that the fitting structure fitted together by making concave or convex in the rotation diameter direction is provided.
- each of the front case and the rear case is provided with a fitting structure that is fitted to each other by forming a concave or convex shape in the rotational radial direction of the output shaft.
- a rotary tool according to a tenth aspect of the present invention is the rotary tool according to the ninth aspect, wherein one of the front case and the rear case has a direction intersecting the axial direction of the output shaft.
- a female screw to be screwed is provided, and one of the front case and the rear case is screwed to the female screw via a male screw.
- the female screw is a shaft of the output shaft. It is the structure of being provided in the said fitting structure so that a screw stop is possible in the direction which cross
- the screw of the tenth invention when either the front case or the rear case is screwed to the female screw via the male screw, the screw is screwed in the direction intersecting the axial direction of the output shaft.
- the male screw is not disposed in the axial direction in which the output shaft extends as in the conventional case, and the portion where the output shaft is disposed can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
- FIG. 5 is a rear perspective view illustrating a state in which the bearing box and the hammer case are assembled in FIG. 4.
- FIG. 6 is a front perspective view illustrating a state before assembling a bearing box and a hammer case different from those in FIG. 5.
- FIGS. 1 to 3 an impact driver 10 is illustrated.
- the right split housing 16 is removed.
- the cross-sectional view of the impact driver 10 in FIG. A cross-sectional view of the impact driver 10 in FIG. 3 is indicated by (III)-(III) cross-sectional arrows in FIG.
- the front perspective view of FIG. 4 illustrates the housing 14, the bearing box 50, and the hammer case 70 before assembly.
- the rear perspective view of FIG. 5 illustrates a state in which the bearing box 50 and the hammer case 70 are assembled in FIG.
- the impact driver 10 shown in FIGS. 1 to 4 is a pistol-type tool for rotating an anvil 66 as an output shaft, and corresponds to the rotary tool according to the present invention. More specifically, the impact driver 10 corresponds to a rotary impact tool.
- the impact driver 10 will be described based on the “front / rear / up / down / left / right” directions as shown in the drawings.
- the lower side of the impact driver 10 is defined based on the arrangement side of the grip portion 20.
- the front side of the impact driver 10 is defined based on the arrangement side of the anvil 66.
- the anvil 66 corresponds to the output shaft according to the present invention. That is, this front side corresponds to the output side according to the present invention.
- the impact driver 10 shown in FIGS. 1 to 3 shows only the tool body 11. That is, when used as the impact driver 10, an electric tool battery (not shown) is mounted on the battery mounting portion 13 set at the lower portion of the tool body 11.
- the battery for the power tool serves as a power source for the impact driver 10.
- this battery for electric tools BL1450 made from Makita Corporation is mentioned, for example.
- the power tool battery is mounted by sliding the battery mounting portion 13 from front to back.
- the power tool battery is removed by sliding the battery mounting portion 13 from the rear to the front while pressing the lock release button of the power tool battery.
- a screw tightening bit B as a tip tool is attached to the anvil 66 set at the front portion of the tool body 11.
- the impact driver 10 shown in FIGS. 1 to 4 functions as a rotary impact tool. That is, the impact driver 10 rotates the anvil 66 and applies a striking force in the rotation direction when a torque greater than a predetermined value is applied from the outside to the rotation operation.
- the illustrated tool body 11 generally includes a battery mounting portion 13, a grip portion 20, a motor portion 30, and a hammer portion 40.
- the battery mounting unit 13 is mounted with a power tool battery (not shown) as described above.
- 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 which are divided in the left-right direction intersecting the axial direction (front-rear direction) of the anvil 66.
- the Incidentally, the housing 14 also serves as a grip housing portion 21 and a motor housing portion 31 which will be described in detail later.
- the battery mounting portion 13 has a rail structure 131 and a locking structure 132 that can be attached and detached by sliding a power tool battery (not shown). Further, the battery mounting part 13 has a terminal (not shown) supported at the lower part of the housing 14. The terminal can be electrically connected to the attached power tool battery.
- the front end of the battery mounting portion 13 is formed so that the front end and the front end of a hammer portion 40, which will be described later, substantially coincide with each other. Further, the rear end of the battery mounting portion 13 is formed so that the front and rear positions of the rear end of the motor portion 30 described later substantially coincide.
- a controller (not shown) is housed inside the housing 14 immediately above the battery mounting portion 13.
- an operation display unit 17 is provided on the upper side of the battery mounting unit 13 protruding to the front side.
- a grip portion 20 is provided on the upper side of the battery mounting portion 13.
- the grip part 20 is formed as a part gripped by the user's hand.
- the grip portion 20 is formed by a grip housing portion 21 that is a part of the housing 14.
- the grip part 20 is formed by extending the grip housing part 21 in the vertical direction intersecting the axial direction (front-rear direction) of the anvil 66. Therefore, the impact driver 10 has a pistol shape that is excellent in handling from the position of the grip portion 20 and the anvil 66.
- the shape of the grip housing portion 21 is selected so that the finger grip is improved when the user grips it with the hand.
- An operation switch 22 is provided on the upper portion of the grip housing portion 21.
- the operation switch 22 includes a switch main body 23 housed in the grip housing portion 21, a trigger member 24 that is pushed into the switch main body 23, and a switching knob 25 that switches the forward / reverse rotation direction of the anvil 66.
- the operation signal input to the operation switch 22 is transmitted to a controller (not shown).
- the shape of the grip housing part 21 located on the rear side of the operation switch 22 has a concave shape that facilitates the insertion between the thumb and the index finger when grasped by the user's hand.
- an LED irradiation device 26 capable of irradiating the front of the impact driver 10 is provided above the trigger member 24.
- the motor unit 30 is configured by incorporating a brushless motor 33 serving as a drive source in a motor housing unit 31 serving as 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 70 which will be described in detail later.
- the brushless motor 33 is configured in the same manner as a normal brushless motor. That is, the brushless motor 33 includes a rotor that rotates integrally with the motor shaft 35, a stator that rotates the rotor, and a sensor substrate that detects the rotational position of the rotor, although not shown. A permanent magnet is attached to the rotor.
- the stator generates a magnetic force when a coil is wound and a current flows.
- the sensor substrate is disposed on the front side of the rotor and detects the rotational position of the rotor.
- the motor shaft 35 is disposed so as to extend in the front-rear direction.
- the front side of the motor shaft 35 is supported by a front bearing 351 supported by the motor housing portion 31, and the rear side is supported by a rear bearing 352 supported by the cap member 32.
- a fan 36 that rotates integrally with the motor shaft 35 is attached to the rear portion of the motor shaft 35.
- the fan 36 is attached to the motor shaft 35 on the rear side of the rotor and on the front side of the rear bearing 352.
- the fan 36 is a centrifugal fan.
- the fan 36 rotates integrally with the motor shaft 35 to exhaust the cooling air that has cooled the stator through the exhaust slit 361 to the outside.
- an input gear 37 is attached to the front end of the motor shaft 35.
- the input gear 37 meshes with a planetary gear 42 of a speed reduction mechanism 41 of the hammer portion 40 described below.
- the rear end of the motor housing portion 31 formed by combining the left divided housing 15 and the right divided housing 16 is opened (reference numeral 311 in FIG. 4), and the opening is a cap member 32. (See FIGS. 1 and 2).
- the cap member 32 is integrated with the motor housing portion 31 by being locked to the rear portions of the left divided housing 15 and the right divided housing 16.
- the cap member 32 holds the rear bearing 352 at a substantially central location.
- the cap member 32 is provided with an exhaust slit 361 that allows communication between the outside and the inside.
- a large number of exhaust slits 361 are provided in the cap member 32 so as to be lined up over the facing range of the outer periphery of the fan 36.
- the left split housing 15 and the right split housing 16 are held together at eight screwing points (indicated by reference numeral 18).
- the battery mounting part 13 is provided with two screwing points (indicated by reference numeral 18)
- the grip part 20 is provided with two screwing points (indicated by reference numeral 18)
- the motor part 30 is provided with one screwing point (reference numeral 18).
- a hammer part 40 is arranged on the front side of the motor part 30.
- the hammer part 40 is supported by the motor housing part 31.
- the hammer part 40 generally includes a speed reduction mechanism 41 and a striking mechanism 61.
- the speed reduction mechanism 41 decelerates the rotational drive of the motor shaft 35 and inputs it to the striking mechanism 61.
- the speed reduction mechanism 41 is supported by the bearing box 50, and the striking mechanism 61 is supported by the hammer case 70.
- the speed reduction mechanism 41 corresponds to the first power transmission mechanism according to the present invention.
- the striking mechanism 61 corresponds to the second power transmission mechanism according to the present invention. Further, the speed reduction mechanism 41 and the striking mechanism 61 correspond to a power transmission mechanism according to the present invention. That is, the speed reduction mechanism 41 and the striking mechanism 61 are disposed on the output side of the motor housing portion 31.
- the deceleration mechanism 41 is composed of a widely used planetary gear mechanism. As shown in FIG. 3, the speed reduction mechanism 41 has three planetary gears 42 that mesh with the input gear 37 described above.
- 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 integrally rotates the drive shaft 62 that is integrated.
- the carrier 47 is rotatably supported by a rear bearing 48 and an accommodation recess 669 provided in the anvil 66.
- the bearing 48 is supported by the bearing box 50, and the internal gear 45 is fixed and held in the bearing box 50 so as not to be relatively rotatable. That is, the carrier 47 corresponds to the power transmission member according to the present invention, and the bearing 48 corresponds to the support portion according to the present invention.
- 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 61 generally includes a drive shaft 62, a steel ball 63, a hammer 64, a compression spring 65, and an anvil 66.
- the drive shaft 62, the steel ball 63, the hammer 64, the compression spring 65, and the anvil 66 are housed and supported in the hammer case 70.
- the drive shaft 62 is rotationally driven together with the integrated carrier 47.
- a steel ball holding recess 621 is provided on the peripheral surface of the drive shaft 62.
- the steel ball holding recess 621 is formed in a concave shape capable of accommodating half of the super hard sphere steel ball 63.
- the concave shape of the steel ball holding concave portion 621 is a concave shape extending in the front-rear direction. That is, the steel ball 63 can roll in the steel ball holding recess 621 extending in the tilt direction.
- a hammer 64 having an appropriate weight is also provided with a guide groove 641 on which the steel ball 63 rolls.
- the guide groove 641 is provided at a location where it can face the steel ball holding recess 621 by relative rotation.
- the guide groove 641 is also formed in a concave shape that can accommodate half of the superhard steel ball 63.
- the concave shape of the guide groove 641 is a concave shape extending in the front-rear direction. That is, the steel ball 63 can roll in the guide groove 641 extending in the front-rear direction.
- the hammer 64 is provided with a housing recess 643 for housing the compression spring 65.
- the housing recess 643 has a concave shape that is bent in the front-rear direction.
- the front end of the compression spring 65 contacts the inner end on the front side of the housing recess 643.
- the compression spring 65 is formed by compressing a coil spring.
- the compression spring 65 has a rear end in contact with and supported by the carrier 47 and a front end in contact with and supported in the housing recess 643 to constantly urge the hammer 64 forward.
- a striking piece 645 is provided on the front surface of the hammer 64 so as to protrude forward.
- the striking piece 645 has a protruding shape that hits a striking arm 665 provided at the rear end of the anvil 66.
- Two hitting piece portions 645 are provided on the front surface of the hammer 64 at intervals of 180 degrees in the circumferential direction.
- Two striking arm portions 665 are also provided at the rear end of the anvil 66 at intervals of 180 degrees in the circumferential direction.
- the striking arm portion 665 extends in an arm shape radially outward from the rear end of the anvil body 661 to a position facing the striking piece portion 645.
- the anvil 66 has an anvil body 661 and the hitting arm portion 665 described above.
- the anvil body 661 is formed in a substantially cylindrical shape that extends in the front-rear direction.
- the outer periphery of the anvil body 661 is in contact with the needle bearing 663.
- the needle bearing 663 is held at the front portion of the hammer case 70 and rotatably supports the anvil 66.
- a bit holding mechanism 67 for holding the bit B is provided at the front end of the anvil body 661.
- the bit holding mechanism 67 holds the bit B accommodated in the interior 662 of the anvil body 661 extending in the axial direction.
- the striking mechanism 61 operates as follows. That is, when a torque of a predetermined value or more is applied to the rotation operation of the anvil 66, a relative displacement is generated between the drive shaft 62 and the hammer 64 in the rotation direction. This relative displacement has the effect of moving the steel ball 63 against the urging force of the compression spring 65 inside both the steel ball holding recess 621 and the guide groove 641. As a result, the hammer 64 moves backward relative to the drive shaft 62, and the hitting piece portion 645 that has been in contact with the hitting arm portion 665 until then is detached from the hitting arm portion 665.
- the hammer 64 When the striking piece portion 645 is detached from the striking arm portion 665 as described above, the hammer 64 is idled instantaneously, and receives the urging force of the compression spring 65 and again strikes the striking arm portion 665. This hit is the striking force applied to the rotating motion of the anvil 66.
- the bearing box 50 corresponds to the rear case according to the present invention and the first case according to the present invention.
- the hammer case 70 corresponds to the front case according to the present invention and the second case according to the present invention.
- the bearing box 50 and the hammer case 70 correspond to the case according to the present invention. That is, both the bearing box 50 and the hammer case 70 have a case shape in which they are integrated with each other. In other words, the bearing box 50 and the hammer case 70 that can be integrated with each other are formed to be separable in the front-rear direction.
- the bearing box 50 corresponds to one of the front case and the rear case according to the present invention, and corresponds to either the first case or the second case according to the present invention.
- the hammer case 70 corresponds to the other of the front case and the rear case according to the present invention, and corresponds to the other of the first case and the second case according to the present invention.
- the bearing box 50 and the hammer case 70 are both formed of metal.
- the bearing box 50 has an annular peripheral wall body 51.
- a rear wall 52 formed in an inner flange shape is connected to the rear end edge of the peripheral wall main body 51.
- an opening portion 521 that allows the input gear 37 to be inserted into the bearing box 50 is provided.
- a bearing accommodating support 522 that accommodates and supports the bearing 48 is provided.
- the front end edge of the peripheral wall body 51 does not have an inner flange shape like the rear wall portion 52, and opens toward the inside of the hammer case 70.
- a left overhang portion 55 and a right overhang portion 56 are provided in pairs on the left and right sides.
- the left projecting portion 55 and the right projecting portion 56 are provided so as to protrude from the peripheral surface of the peripheral wall body 51 so as to protrude outward in the rotational radial direction of the anvil 66.
- the left overhang 55 and the right overhang 56 are provided symmetrically with respect to the axis of the anvil 66 (output shaft).
- the left overhang 55 and the right overhang 56 are provided on the peripheral wall main body 51 below the upper vertex 511 of the peripheral wall main body 51.
- the left overhanging portion 55 and the right overhanging portion 56 are provided on the peripheral wall main body 51 above the left and right side apexes 513 and 514 of the peripheral wall main body 51.
- the left overhang 55 is located on the right side of the left apex 513
- the right overhang 56 is located on the left side of the right apex 514.
- the left overhang 55 and the right overhang 56 are provided with upper surface portions 551 and 561 that both face upward.
- the left overhanging portion 55 and the right overhanging portion 56 are provided with side surface portions 552 and 562 that face the sides (left and right sides).
- the upper surface portions 551 and 561 are formed to have a surface shape extending in the horizontal direction.
- the side surface portions 552 and 562 are formed to have a surface shape extending in the vertical direction.
- the left overhanging portion 55 and the right overhanging portion 56 are provided so that substantially rectangular corners protrude outward in the rotational radial direction due to the surface shape facing upward and laterally.
- These side portions 552 and 562 are provided with female screw portions 57 and 58, respectively.
- the female screw portions 57 and 58 are formed by being cut into female screws in the horizontal direction facing each other with respect to the left overhang portion 55 and the right overhang portion 56.
- a male screw member 80 is screwed to these screw portions 57 and 58 in a direction crossing the axial direction of the anvil 66 as an output shaft. That is, these female screw portions 57 and 58 are female screws that can be screwed in the left-right direction orthogonal to the axial direction of the anvil 66.
- the male screw member 80 is a female screw that is screwed to the female screw portions 57 and 58, and is similarly screwed in the left-right direction orthogonal to the axial direction of the anvil 66.
- the female screw portions 57 and 58 correspond to the female screw and the holding portion according to the present invention
- the male screw member 80 corresponds to the male screw and the insertion member according to the present invention.
- the hammer case 70 has a left side fitting part 75 and a right side fitting part 76 corresponding to the left side extension part 55 and the right side extension part 56 provided on the peripheral wall body 51 of the bearing box 50. Is provided.
- the left fitting portion 75 and the right fitting portion 76 are also provided so as to protrude in pairs on the left and right sides.
- the left side fitting part 75 and the right side fitting part 76 are provided so that the left overhanging part 55 and the right overhanging part 56 can be fitted inside at the same time by assembling the hammer case 70 to the bearing box 50 in the front-rear direction. ing. That is, the left fitting portion 75 is formed to have an internal shape corresponding to the external shape of the left overhang portion 55.
- the right fitting portion 76 has an internal shape corresponding to the external shape of the right overhang portion 56.
- the left fitting portion 75 and the right fitting portion 76 are formed with an appropriate space shape into which the left protruding portion 55 and the right protruding portion 56 can be fitted.
- the fitting protruding outward in the rotational radial direction is the hammer case 70.
- the fitting of the left overhanging portion 55 and the right overhanging portion 56 of the left fitting portion 75 and the right fitting portion 76 is fitted by projecting outwardly in the rotation radial direction of the anvil 66. Is set as
- the left fitting portion 75 and the right fitting portion 76 are also provided with upper surface portions 751 and 761 that both face upward, and both have side surface portions 752 and 762 that face sideways (left and right sides). It has been.
- the side surface portions 752 and 762 are provided with insertion holes 77 and 78 penetrating in the left-right direction.
- the insertion holes 77 and 78 are through holes that allow the male screw member 80 as an insertion member to be inserted.
- the insertion holes 77 and 78 correspond to the insertion portion according to the present invention.
- the male screw member 80 is inserted into the insertion hole 77. , 78 can be screwed to the female screw portions 57, 58.
- the motor housing portion 31 also has a left outer peripheral portion 85 and a right outer peripheral portion 86 corresponding to the left projecting portion 55 and the right projecting portion 56 provided on the peripheral wall body 51 of the bearing box 50. Is provided.
- the left outer peripheral portion 85 and the right outer peripheral portion 86 are also provided so as to protrude in pairs on the left and right sides of the motor housing portion 31.
- the left outer peripheral portion 85 is provided so that a left fitting portion 75 fitted with the left overhang portion 55 can be fitted therein when the left divided housing 15 is assembled to the hammer case 70 assembled to the bearing box 50.
- the right outer peripheral portion 86 is provided so that a right fitting portion 76 fitted with a right overhang portion 56 can be fitted therein when the right divided housing 16 is assembled to the hammer case 70 assembled to the bearing box 50. Yes.
- the left outer peripheral portion 85 is formed to have an internal shape corresponding to the external shape of the left fitting portion 75.
- the right outer peripheral portion 86 is formed having an internal shape corresponding to the external shape of the right fitting portion 76.
- the left outer peripheral portion 85 and the right outer peripheral portion 86 are formed with appropriate space shapes into which the left fitting portion 75 and the right fitting portion 76 can be fitted.
- the left outer peripheral portion 85 and the right outer peripheral portion 86 are both provided with upper surface portions 851 and 861 facing upward, and both are provided with side surface portions 852 and 862 facing laterally (left and right sides). Yes.
- the side surface portions 852 and 862 are also provided with insertion holes 87 and 88 penetrating in the left-right direction.
- the insertion holes 87 and 88 are also through holes that allow the male screw member 80 to be inserted.
- the right outer peripheral portion 86 covers the right fitting portion 76 outside the right overhang portion 56. Then, the left male screw member 80 can be screwed to the female screw portion 57 through the insertion holes 77 and 87, and the right male screw member 80 can be screwed to the female screw portion 58 through the insertion holes 78 and 88. It becomes. That is, the motor housing portion 31 is fastened together with the hammer case 70 to the female screw portions 57 and 58 via the male screw member 80.
- the motor housing portion 31 when the motor housing portion 31 is screwed to the female screw portions 57 and 58 via the male screw member 80, the motor housing portion 31 is screwed in a direction orthogonal to the axial direction of the anvil 66.
- the male screw member 80 screwed into the female screw portions 57 and 58 while being inserted into the insertion holes 77 and 78 can restrict the relative movement of the motor housing portion 31 with respect to the bearing box 50.
- the relative movement of the motor housing portion 31 with respect to the bearing box 50 is restricted, there is no need to place a male screw member in the axial direction in which the anvil 66 extends as in the prior art, and the place where it is placed can be made slim. Can be planned. Therefore, it is possible to improve the handling efficiency when used as the impact driver 10.
- the hammer case 70 and the bearing box 50 have the fitting structures 55, 56, 75, and 76 that are fitted to each other by projecting in the rotational radial direction of the anvil 66. Is provided. Accordingly, the relative rotation of the hammer case 70 with respect to the bearing box 50 can be exerted. Therefore, the relative position of the hammer case 70 with respect to the bearing box 50 can be fixed, and the stability of the product that makes it difficult for the bearing box 50 and the hammer case 70 to come off can be enhanced.
- the female screw portion 57 via the male screw member 80 with respect to the place (illustrated reference numerals 55 (56), 75 (76), 85 (86)) forming this fitting structure. , 58 are screwed.
- an overhanging structure having a plurality of functions can be provided, and an anti-rotation effect can be efficiently achieved while achieving slimming.
- the front perspective view of FIG. 6 illustrates a state before the bearing box 50A and the hammer case 70A, which are different from those in FIG. 5, are assembled.
- the power transmission mechanism 40A is housed in the hammer case 70A and the bearing box 50A.
- the hammer case 70 ⁇ / b> A and the bearing box 50 ⁇ / b> A are configured so as to be integrated with each other by a male screw 54 and a female screw 74. That is, a male screw 54 is formed on the outer periphery of the front portion of the peripheral wall body 51 of the bearing box 50A.
- a female screw 74 is formed on the inner periphery of the rear part of the hammer case 70.
- the portion having the above-described fitting structure is not set in the hammer case 70 ⁇ / b> A, and the left outer peripheral portion 85 and the right outer peripheral portion 86 are directly connected to the left overhang portion 55 and the right overhang portion 56. It is to be covered.
- the screw tightening direction of the male screw 54 with respect to the female screw 74 coincides with the striking action direction of the striking mechanism 61 (the rotation direction of the anvil 66). That is, the hammer case 70 is subjected to the striking reaction of the striking mechanism 61, and the male screw 54 rotates in the screw tightening direction with respect to the female screw 74 due to this striking reaction. As a result, the male screw 54 does not come off even when subjected to a striking reaction against the female screw 74, and the relative position of the hammer case 70 with respect to the bearing box 50 can be fixed without loosening.
- rotary tool according to the present invention is not limited to the above-described embodiment, and can be configured with appropriate modifications.
- the impact driver 10 is cited as an example of the rotary tool, and this will be described.
- 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.
- the power transmission mechanism is not limited to the above-described embodiment, and an appropriate mechanism can be adopted.
- the power transmission mechanism may be configured by having a plurality of mechanisms, and may be configured by being divided into a plurality of cases as well.
- the holding portion according to the present invention is formed by the female screw portions 57 and 58, and the insertion member according to the present invention is formed by the male screw member 80.
- maintenance part which concerns on this invention should just be formed so that the insertion member can be hold
- the insertion member in such a case is formed of a pin-shaped member that can be inserted into the hole as the holding portion.
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Abstract
According to the present invention, a left-side split housing (15) is fitted to a hammer case (70). A left-side peripheral section (85) is disposed so as to cover a left-side engagement section (75) situated on the outer side of a left-side protruding section (55). A right-side split housing (16) is fitted to the hammer case (70). A right-side peripheral section (86) is disposed so as to cover a right-side engagement section (76) situated on the outer side of a right-side protruding section (56). A left-side male thread member (80) can be screwed and locked with a female thread section through an insertion hole, while a right-side male thread member (80) can be screwed and locked with a female thread section (58) through insertion holes (78, 88). Thus, a motor housing section (31) is screwed and locked with the female thread section (58) via the male screw members (80). This screwing and locking is performed in a direction that orthogonally intersects with the axial direction of an anvil.
Description
本発明は、出力軸を回転動作させる回転工具に関する。
The present invention relates to a rotary tool that rotates an output shaft.
従来、インパクトドライバに代表される回転工具が知られている(特開2014-140909号公報参照)。この種の回転工具は、駆動源としてモータが内蔵される。モータは、モータ軸を回転駆動させる。モータ軸は、減速機構を介して打撃機構に回転駆動力を入力する。入力された打撃機構は、回転駆動を受けて回転するハンマと、ハンマの回転駆動を受けて回転するアンビルとを有する。この打撃機構は、出力軸の回転動作に対して所定値以上のトルクが外部から加わると、アンビルからハンマが外れて空転する。空転するハンマは、アンビルを回転方向で打撃し、出力軸の回転動作に打撃力が加わるものとなっている。このような打撃機構はハンマケースに内装される。
Conventionally, a rotary tool represented by an impact driver is known (see Japanese Patent Application Laid-Open No. 2014-140909). This type of rotary tool incorporates a motor as a drive source. The motor rotates the motor shaft. The motor shaft inputs rotational driving force to the striking mechanism via the speed reduction mechanism. The input striking mechanism includes a hammer that rotates by receiving a rotational drive, and an anvil that rotates by receiving the rotational drive of the hammer. When a torque of a predetermined value or more is applied from the outside to the rotation operation of the output shaft, the hammering mechanism is disengaged from the anvil and idles. The spinning hammer strikes the anvil in the rotational direction, and the striking force is applied to the rotation operation of the output shaft. Such a striking mechanism is housed in the hammer case.
ハンマケースは、モータを内装するハウジングに雄螺子を介して螺子止めされる。この際、雄螺子は、外周側において出力軸が延びる軸方向(前後方向)に配置されて、ハンマケースをハウジングに螺子止めしている。このため、ハンマケースの外周には、螺子止めするための螺子止め箇所が数箇所設けられている。このような螺子止め箇所は、ハンマケースの外周から外側に少なくとも螺子の長さ分を張り出させてしまう構造であり、この張出しによりハンマケースの外周が大きくなってしまう。そうすると、この回転工具を狭い場所で使用する場合の取回しが悪くなってしまうという指摘がある。
The hammer case is screwed to the housing that houses the motor via a male screw. At this time, the male screw is disposed in the axial direction (front-rear direction) in which the output shaft extends on the outer peripheral side, and the hammer case is screwed to the housing. For this reason, several screwing points for screwing are provided on the outer periphery of the hammer case. Such a screwing portion has a structure in which at least the length of the screw protrudes outward from the outer periphery of the hammer case, and the outer periphery of the hammer case becomes larger due to the protrusion. If it does so, there exists a point out that handling when this rotary tool is used in a narrow place will worsen.
本発明は、このような事情に鑑みなされたものであって、本発明が解決しようとする課題は、出力軸を回転動作させ、該回転動作に対して所定値以上のトルクが外部から加わると回転方向で打撃力を加える回転工具において、狭い場所で使用する場合でも取回しの良さを向上させることにある。
The present invention has been made in view of such circumstances, and the problem to be solved by the present invention is to rotate the output shaft and apply a torque of a predetermined value or more to the rotation operation from the outside. A rotating tool that applies a striking force in the direction of rotation is to improve the handling efficiency even when used in a narrow place.
上記した課題を解決するにあたって、本発明に係る回転工具は、次の手段をとる。
In solving the above-described problems, the rotary tool according to the present invention takes the following means.
本発明の第1の発明に係る回転工具は、出力軸を回転動作させる回転工具であって、モータと、該モータを収容するモータハウジングと、該モータの駆動力を前記出力軸に伝達する動力伝達機構とを有し、前記動力伝達機構を内装するケースには、前記出力軸の軸方向と交差する方向に差し込まれる差込部材を保持する保持部が設けられており、前記モータハウジングには、前記差込部材を差込可能とする差込部が設けられており、前記差込部に差し込まれながら前記保持部に保持された前記差込部材は、前記ケースに対する前記モータハウジングの相対移動を規制する、という構成である。
A rotary tool according to a first aspect of the present invention is a rotary tool that rotates an output shaft, and includes a motor, a motor housing that houses the motor, and power that transmits a driving force of the motor to the output shaft. The case that includes the transmission mechanism and includes the power transmission mechanism is provided with a holding portion that holds an insertion member that is inserted in a direction intersecting the axial direction of the output shaft. The insertion member that allows the insertion member to be inserted is provided, and the insertion member held by the holding portion while being inserted into the insertion portion is moved relative to the case with respect to the case. It is the structure of regulating.
第1の発明に係る回転工具によれば、差込部に差し込まれながら保持部に保持された差込部材は、ケースに対するモータハウジングの相対移動を規制することができる。これによって、ケースに対するモータハウジングの相対移動を規制するにあたって、従来のような出力軸が延びる軸方向に雄螺子のような相対移動を規制する部材を配置することを止めることができ、この配置されていた部材箇所のスリム化を図ることができる。したがって、回転工具として使用する場合の取回しの良さを向上させることができる。
According to the rotary tool according to the first aspect of the invention, the insertion member held by the holding portion while being inserted into the insertion portion can regulate the relative movement of the motor housing with respect to the case. As a result, when restricting the relative movement of the motor housing with respect to the case, it is possible to stop placing a member for restricting the relative movement such as a male screw in the axial direction in which the output shaft extends as in the prior art. It is possible to reduce the thickness of the parts that have been used. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
本発明の第2の発明に係る回転工具は、前記第1の発明に係る回転工具において、前記ケースは出力方向で分離される前部ケースと後部ケースとを有し、前記保持部は前記後部ケースに設けられる、という構成である。
A rotary tool according to a second aspect of the present invention is the rotary tool according to the first aspect, wherein the case has a front case and a rear case separated in an output direction, and the holding portion is the rear portion. It is the structure of being provided in a case.
第2の発明に係る回転工具によれば、出力方向に分離した後部ケースに保持部が設けられているので、ケース前部のスリム化を図りながら保持部を設けることができる。したがって、回転工具として使用する場合の取回しの良さを向上させることができる。
According to the rotary tool according to the second aspect of the invention, since the holding part is provided in the rear case separated in the output direction, the holding part can be provided while slimming the front part of the case. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
本発明の第3の発明に係る回転工具は、出力軸を回転動作させる回転工具であって、モータと、該モータを収容するモータハウジングと、該モータの駆動力を前記出力軸に伝達する動力伝達機構とを有し、前記動力伝達機構を内装するケースは、出力方向で分離される前部ケースと後部ケースとを有し、前記前部ケースおよび前記後部ケースのいずれか一方には、前記出力軸の軸方向と交差する方向に差し込まれる差込部材を保持する保持部が設けられており、前記前部ケースおよび前記後部ケースのいずれか他方には、前記差込部材を差込可能とする差込部が設けられており、前記差込部に差し込まれながら前記保持部に保持された前記差込部材は、前記一方のケースに対する前記他方のケースの相対移動を規制する、という構成である。
A rotary tool according to a third aspect of the present invention is a rotary tool that rotates an output shaft, and includes a motor, a motor housing that houses the motor, and power that transmits the driving force of the motor to the output shaft. A case that includes the transmission mechanism and includes the power transmission mechanism includes a front case and a rear case that are separated in an output direction, and one of the front case and the rear case includes the front case and the rear case. A holding portion that holds an insertion member that is inserted in a direction intersecting the axial direction of the output shaft is provided, and the insertion member can be inserted into one of the front case and the rear case. And the insertion member held by the holding portion while being inserted into the insertion portion regulates relative movement of the other case with respect to the one case. is there
第3の発明に係る回転工具によれば、差込部に差し込まれながら保持部に保持された差込部材は、一方のケースに対する他方のケースの相対移動を規制することができる。これによって、一方のケースに対する他方のケースの相対移動を規制するにあたって、従来のような出力軸が延びる軸方向に雄螺子のような相対移動を規制する部材を配置することを止めることができ、この配置されていた部材箇所のスリム化を図ることができる。したがって、回転工具として使用する場合の取回しの良さを向上させることができる。
According to the rotary tool according to the third aspect of the invention, the insertion member held by the holding portion while being inserted into the insertion portion can regulate the relative movement of the other case with respect to the one case. Thereby, in restricting relative movement of the other case with respect to one case, it is possible to stop disposing a member that restricts relative movement such as a male screw in the axial direction in which the output shaft extends, It is possible to reduce the thickness of the arranged member portions. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
本発明の第4の発明に係る回転工具は、前記第3の発明に係る回転工具において、前記動力伝達機構は動力を伝達する動力伝達部材を有し、前記後部ケースは前記動力伝達部材を支持する支持部を有する、という構成である。
The rotary tool according to a fourth aspect of the present invention is the rotary tool according to the third aspect, wherein the power transmission mechanism has a power transmission member for transmitting power, and the rear case supports the power transmission member. It is the structure of having the support part to do.
第4の発明に係る回転工具によれば、後部ケースは動力を伝達する動力伝達部材を支持する支持部を有するので、前部ケースのスリム化を図ることができる。したがって、回転工具として使用する場合の取回しの良さを向上させることができる。
According to the rotary tool according to the fourth aspect of the invention, the rear case has the support portion that supports the power transmission member that transmits power, so that the front case can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
本発明の第5の発明に係る回転工具は、前記第3または前記第4の発明に係る回転工具において、前記動力伝達機構は減速機構を有し、前記後部ケースには前記減速機構が内装される、という構成である。
A rotary tool according to a fifth aspect of the present invention is the rotary tool according to the third or fourth aspect, wherein the power transmission mechanism has a speed reduction mechanism, and the speed reduction mechanism is incorporated in the rear case. This is a configuration.
第5の発明に係る回転工具によれば、後部ケースには減速機構が内装されるので、前部ケースのスリム化を図ることができる。したがって、回転工具として使用する場合の取回しの良さを向上させることができる。
According to the rotary tool according to the fifth aspect of the invention, since the speed reduction mechanism is built in the rear case, the front case can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
本発明の第6の発明に係る回転工具は、前記第3から前記第5のいずれかの発明に係る回転工具において、前記動力伝達機構は回転動作に打撃力を加える打撃機構を有し、前記前部ケースには前記打撃機構が内装される、という構成である。
A rotary tool according to a sixth invention of the present invention is the rotary tool according to any one of the third to fifth inventions, wherein the power transmission mechanism has a striking mechanism that applies a striking force to a rotating operation, The front case is configured such that the striking mechanism is internally provided.
第6の発明に係る回転工具によれば、前部ケースには回転動作に打撃力を加える打撃機構が内装されるので、打撃力を効率良く出力軸に伝達することができる。これによって、機構の単純化を図ることができて工具全体のスリム化を図ることができる。したがって、回転工具として使用する場合の取回しの良さを向上させることができる。
According to the rotary tool according to the sixth aspect of the present invention, since the front case is equipped with a striking mechanism that applies striking force to the rotating operation, the striking force can be efficiently transmitted to the output shaft. As a result, the mechanism can be simplified and the entire tool can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
本発明の第7の発明に係る回転工具は、前記第3から前記第6のいずれかの発明に係る回転工具において、前記モータハウジングは前記差込部材を介して前記保持部に共締めされる、という構成である。
A rotary tool according to a seventh aspect of the present invention is the rotary tool according to any one of the third to sixth aspects, wherein the motor housing is fastened together with the holding portion via the insertion member. This is the configuration.
第7の発明に係る回転工具によれば、モータハウジングは差込部材を介して保持部に共締めされるので、モータハウジングの組付けも同時に行うことができる。これによって、モータハウジングを組み付けるにあたって、ケースを組み付ける際の差込部材を兼用することができて、組み付ける部材点数を少なくして製品としてのスリム化を図り、より取回しの良さを向上させることができる。
According to the rotary tool according to the seventh aspect of the invention, since the motor housing is fastened together with the holding portion via the insertion member, the motor housing can be assembled at the same time. As a result, when assembling the motor housing, it can also be used as an insertion member when assembling the case, reducing the number of assembling members, making the product slim, and improving the handling efficiency. Can do.
本発明の第8の発明に係る回転工具は、前記第1から前記第7のいずれかの発明に係る回転工具において、前記保持部は雌螺子で形成され、前記差込部材は該雌螺子と螺合可能な雄螺子である、という構成である。
A rotary tool according to an eighth invention of the present invention is the rotary tool according to any one of the first to seventh inventions, wherein the holding portion is formed by a female screw, and the insertion member is connected to the female screw. This is a male screw that can be screwed together.
第8の発明に係る回転工具によれば、保持部は雌螺子で形成され、差込部材は雌螺子と螺合可能な雄螺子であるので、保持部に対する差込部材の保持は螺合によりなされることとなる。これによって、保持部に対する差込部材の保持は螺合によって確かなものとなり、螺子締結する部材を廃止することができ、組み付ける部材点数を少なくして製品としてのスリム化を図り、より取回しの良さを向上させることができる。
According to the rotary tool of the eighth invention, since the holding portion is formed by a female screw and the insertion member is a male screw that can be screwed with the female screw, the holding of the insertion member with respect to the holding portion is performed by screwing. Will be made. As a result, the holding of the insertion member with respect to the holding portion is ensured by screwing, and the screw fastening member can be abolished, the number of members to be assembled is reduced, the product is slimmed, and the handling is further performed. The goodness of the can be improved.
本発明の第9の発明に係る回転工具は、出力軸を回転動作させる回転工具であって、モータと、該モータを収容するモータハウジングと、該モータの駆動力を前記出力軸に伝達する動力伝達機構とを有し、前記動力伝達機構を内装するケースは、出力方向で分離される前部ケースと後部ケースとを有し、前記前部ケースおよび前記後部ケースのそれぞれには、前記出力軸の回転径方向に凹または凸をなすことにより互いに嵌め合わされる嵌合構造が設けられている、という構成である。
A rotary tool according to a ninth aspect of the present invention is a rotary tool that rotates an output shaft, and includes a motor, a motor housing that houses the motor, and power that transmits the driving force of the motor to the output shaft. A case that includes the transmission mechanism and that includes the power transmission mechanism includes a front case and a rear case that are separated in an output direction, and each of the front case and the rear case includes the output shaft. It is the structure that the fitting structure fitted together by making concave or convex in the rotation diameter direction is provided.
第9の発明に係る回転工具によれば、前部ケースおよび後部ケースのそれぞれには、出力軸の回転径方向に凹または凸をなすことにより互いに嵌め合わされる嵌合構造が設けられている。これによって、後部ケースに対する前部ケースの相対的な回り止め作用を奏することができる。したがって、後部ケースに対する前部ケースの相対位置を固定させておくことができ、後部ケースと前部ケースとが外れ難いものとした製品としての安定性を高めることができる。
According to the rotary tool according to the ninth aspect of the present invention, each of the front case and the rear case is provided with a fitting structure that is fitted to each other by forming a concave or convex shape in the rotational radial direction of the output shaft. As a result, the relative rotation of the front case with respect to the rear case can be exerted. Therefore, the relative position of the front case with respect to the rear case can be fixed, and the stability of the product that makes it difficult for the rear case and the front case to come off can be enhanced.
本発明の第10の発明に係る回転工具は、前記第9の発明に係る回転工具において、前記前部ケースおよび前記後部ケースのいずれか一方には、前記出力軸の軸方向と交差する方向で螺子止めされる雌螺子が設けられており、前記前部ケースおよび前記後部ケースのいずれか他方は、雄螺子を介して前記雌螺子に螺子止めされる、前記雌螺子は、前記出力軸の軸方向と交差する方向で螺子止め可能に前記嵌合構造に設けられている、という構成である。
A rotary tool according to a tenth aspect of the present invention is the rotary tool according to the ninth aspect, wherein one of the front case and the rear case has a direction intersecting the axial direction of the output shaft. A female screw to be screwed is provided, and one of the front case and the rear case is screwed to the female screw via a male screw. The female screw is a shaft of the output shaft. It is the structure of being provided in the said fitting structure so that a screw stop is possible in the direction which cross | intersects a direction.
第10の発明に係る回転工具によれば、前部ケースおよび後部ケースのいずれか他方が雄螺子を介して雌螺子に螺子止めされるにあたり、出力軸の軸方向と交差する方向で螺子止めされる。これによって、従来のような出力軸が延びる軸方向に雄螺子を配置することが無くなり、この配置されていた箇所のスリム化を図ることができる。したがって、回転工具として使用する場合の取回しの良さを向上させることができる。
According to the rotary tool of the tenth invention, when either the front case or the rear case is screwed to the female screw via the male screw, the screw is screwed in the direction intersecting the axial direction of the output shaft. The As a result, the male screw is not disposed in the axial direction in which the output shaft extends as in the conventional case, and the portion where the output shaft is disposed can be slimmed. Accordingly, it is possible to improve the handling efficiency when used as a rotary tool.
以下、本発明に係る回転工具を実施するための実施の形態について図1~図5を参照しながら説明する。図1~図3では、インパクトドライバ10を図示している。図1のインパクトドライバ10の側面図は、右側分割ハウジング16が取り外されている。図2のインパクトドライバ10の断面図は、左右半割り断面視にて示している。図3のインパクトドライバ10の断面図は、図1の(III)-(III)断面矢視にて示している。図4の前側斜視図は、組み付ける前のハウジング14,ベアリングボックス50,ハンマケース70を図示する。図5の後側斜視図は、図4においてベアリングボックス50とハンマケース70を組み付けた状態を図示する。
Hereinafter, an embodiment for carrying out the rotary tool according to the present invention will be described with reference to FIGS. 1 to 3, an impact driver 10 is illustrated. In the side view of the impact driver 10 of FIG. 1, the right split housing 16 is removed. The cross-sectional view of the impact driver 10 in FIG. A cross-sectional view of the impact driver 10 in FIG. 3 is indicated by (III)-(III) cross-sectional arrows in FIG. The front perspective view of FIG. 4 illustrates the housing 14, the bearing box 50, and the hammer case 70 before assembly. The rear perspective view of FIG. 5 illustrates a state in which the bearing box 50 and the hammer case 70 are assembled in FIG.
図1~図4に示すインパクトドライバ10は、出力軸としてのアンビル66を回転動作させるピストル形工具の工具であり、本発明に係る回転工具に相当する。より詳しく言えば、このインパクトドライバ10は回転打撃工具に相当する。以下、このインパクトドライバ10を説明するにあたっては、図面に記載のとおりの『前後上下左右』の方向に基づいて説明する。ちなみに、このインパクトドライバ10の下側は、グリップ部20の配置側に基づいて規定している。また、このインパクトドライバ10の前側は、アンビル66の配置側に基づいて規定している。このアンビル66は、本願発明に係る出力軸に相当する。つまり、この前側が本発明に係る出力側に相当する。なお、図1~図3に示すインパクトドライバ10は、工具本体11のみが図示されている。つまり、インパクトドライバ10として使用する際は、工具本体11の下部に設定されるバッテリ装着部13に電動工具用バッテリ(図示省略)が装着される。
The impact driver 10 shown in FIGS. 1 to 4 is a pistol-type tool for rotating an anvil 66 as an output shaft, and corresponds to the rotary tool according to the present invention. More specifically, the impact driver 10 corresponds to a rotary impact tool. Hereinafter, the impact driver 10 will be described based on the “front / rear / up / down / left / right” directions as shown in the drawings. Incidentally, the lower side of the impact driver 10 is defined based on the arrangement side of the grip portion 20. Further, the front side of the impact driver 10 is defined based on the arrangement side of the anvil 66. The anvil 66 corresponds to the output shaft according to the present invention. That is, this front side corresponds to the output side according to the present invention. The impact driver 10 shown in FIGS. 1 to 3 shows only the tool body 11. That is, when used as the impact driver 10, an electric tool battery (not shown) is mounted on the battery mounting portion 13 set at the lower portion of the tool body 11.
電動工具用バッテリは、インパクトドライバ10の電源をなす。この電動工具用バッテリとしては、例えば株式会社マキタ製のBL1450が挙げられる。電動工具用バッテリは、バッテリ装着部13に対して前から後に向けてスライドさせることにより装着される。また、電動工具用バッテリは、電動工具用バッテリのロック解除ボタンを押しながら、バッテリ装着部13に対して後から前に向けてスライドさせることにより取り外される。また、インパクトドライバ10として使用する際は、工具本体11の前部に設定されるアンビル66に、先端工具としての螺子締め用のビットBが取り付けられる。
電動 The battery for the power tool serves as a power source for the impact driver 10. As this battery for electric tools, BL1450 made from Makita Corporation is mentioned, for example. The power tool battery is mounted by sliding the battery mounting portion 13 from front to back. The power tool battery is removed by sliding the battery mounting portion 13 from the rear to the front while pressing the lock release button of the power tool battery. When used as the impact driver 10, a screw tightening bit B as a tip tool is attached to the anvil 66 set at the front portion of the tool body 11.
図1~図4に示すインパクトドライバ10は、回転打撃工具として機能する。すなわち、インパクトドライバ10は、アンビル66を回転動作させ、回転動作に対して所定値以上のトルクが外部から加わると回転方向で打撃力を加える。図示される工具本体11は、概略、バッテリ装着部13と、グリップ部20と、モータ部30と、ハンマ部40とを有する。バッテリ装着部13は、上記したとおりの電動工具用バッテリ(図示省略)が装着される。バッテリ装着部13はハウジング14の下部に設けられている。
The impact driver 10 shown in FIGS. 1 to 4 functions as a rotary impact tool. That is, the impact driver 10 rotates the anvil 66 and applies a striking force in the rotation direction when a torque greater than a predetermined value is applied from the outside to the rotation operation. The illustrated tool body 11 generally includes a battery mounting portion 13, a grip portion 20, a motor portion 30, and a hammer portion 40. The battery mounting unit 13 is mounted with a power tool battery (not shown) as described above. The battery mounting part 13 is provided in the lower part of the housing 14.
図3および図4にも示すように、ハウジング14は、アンビル66の軸方向(前後方向)と交差する左右方向で分けられた左側分割ハウジング15と右側分割ハウジング16とを合体させることにより形成される。ちなみに、このハウジング14は、後に詳述するグリップハウジング部21およびモータハウジング部31も兼ねている。
As shown in FIGS. 3 and 4, the housing 14 is formed by combining the left divided housing 15 and the right divided housing 16 which are divided in the left-right direction intersecting the axial direction (front-rear direction) of the anvil 66. The Incidentally, the housing 14 also serves as a grip housing portion 21 and a motor housing portion 31 which will be described in detail later.
図1および図2に示すように、バッテリ装着部13は、電動工具用バッテリ(図示省略)がスライドさせることにより着脱可能とするレール構造131および係止構造132を有する。また、バッテリ装着部13は、ハウジング14の下部にて支持されるターミナル(図示省略)を有する。ターミナルは、装着された電動工具用バッテリと電気的に接続可能とする。なお、このバッテリ装着部13の前端は、後に説明するハンマ部40の前端と前後位置が略一致するように形成されている。また、バッテリ装着部13の後端は、後に説明するモータ部30の後端と前後位置が略一致するように形成されている。なお、ターミナルと同様に図示省略したが、バッテリ装着部13の直ぐ上側のハウジング14の内部にはコントローラ(図示省略)が内装される。また、前側に張り出されたバッテリ装着部13の上側には、操作表示部17が設けられている。
As shown in FIGS. 1 and 2, the battery mounting portion 13 has a rail structure 131 and a locking structure 132 that can be attached and detached by sliding a power tool battery (not shown). Further, the battery mounting part 13 has a terminal (not shown) supported at the lower part of the housing 14. The terminal can be electrically connected to the attached power tool battery. The front end of the battery mounting portion 13 is formed so that the front end and the front end of a hammer portion 40, which will be described later, substantially coincide with each other. Further, the rear end of the battery mounting portion 13 is formed so that the front and rear positions of the rear end of the motor portion 30 described later substantially coincide. Although not shown like the terminal, a controller (not shown) is housed inside 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.
図1~図4に示すように、バッテリ装着部13の上側にはグリップ部20が設けられる。グリップ部20は、ユーザの手で握られる部分として形成される。このグリップ部20は、ハウジング14の一部となるグリップハウジング部21により形成されている。グリップ部20は、アンビル66の軸方向(前後方向)に交差する上下方向にグリップハウジング部21を延ばして形成される。このため、インパクトドライバ10は、グリップ部20とアンビル66との位置から取り扱いに優れるピストル形をなしている。このグリップハウジング部21の形状は、ユーザが手で握った場合に指掛かりが良くなる形状が選択されている。
As shown in FIGS. 1 to 4, a grip portion 20 is provided on the upper side of the battery mounting portion 13. The grip part 20 is formed as a part gripped by the user's hand. The grip portion 20 is formed by a grip housing portion 21 that is a part of the housing 14. The grip part 20 is formed by extending the grip housing part 21 in the vertical direction intersecting the axial direction (front-rear direction) of the anvil 66. Therefore, the impact driver 10 has a pistol shape that is excellent in handling from the position of the grip portion 20 and the anvil 66. The shape of the grip housing portion 21 is selected so that the finger grip is improved when the user grips it with the hand.
グリップハウジング部21の上部には、操作スイッチ22が設けられている。操作スイッチ22は、グリップハウジング部21の内部に収容されるスイッチ本体23と、スイッチ本体23に押込み入力するトリガ部材24と、アンビル66の正転逆転の回転方向を切替える切替ノブ25とを有する。操作スイッチ22に入力された操作信号は、図示省略のコントローラに送信される。なお、この操作スイッチ22の後側に位置するグリップハウジング部21の形状は、ユーザの手で握った場合の親指と人差し指との間が入り易くなる凹形をなしている。また、トリガ部材24の上側には、インパクトドライバ10の前方を照射可能なLED照射装置26が設けられている。
An operation switch 22 is provided on the upper portion of the grip housing portion 21. The operation switch 22 includes a switch main body 23 housed in the grip housing portion 21, a trigger member 24 that is pushed into the switch main body 23, and a switching knob 25 that switches the forward / reverse rotation direction of the anvil 66. The operation signal input to the operation switch 22 is transmitted to a controller (not shown). In addition, the shape of the grip housing part 21 located on the rear side of the operation switch 22 has a concave shape that facilitates the insertion between the thumb and the index finger when grasped by the user's hand. Further, an LED irradiation device 26 capable of irradiating the front of the impact driver 10 is provided above the trigger member 24.
図1および図2に示すようにグリップ部20の上側には、モータ部30とハンマ部40とが、後と前の順で並んで配置されている。モータ部30は、ハウジング14の一部となるモータハウジング部31に、駆動源となるブラシレスモータ33を内装して構成される。なお、モータハウジング部31は、ブラシレスモータ33を支持すると共に、後に詳述するベアリングボックス50およびハンマケース70も支持する。ブラシレスモータ33は、通常のブラシレスモータと同様に構成される。すなわち、ブラシレスモータ33は、図示省略するが、モータ軸35と一体回転するロータと、ロータを回転作用するステータと、ロータの回転位置を検出するセンサ基板とを有する。ロータは、永久磁石が取り付けられている。ステータは、コイルが巻回されて電流が流れると磁力を発生する。センサ基板は、ロータの前側に配置されてロータの回転位置を検出する。
As shown in FIGS. 1 and 2, on the upper side of the grip portion 20, a motor portion 30 and a hammer portion 40 are arranged in the order of rear and front. The motor unit 30 is configured by incorporating a brushless motor 33 serving as a drive source in a motor housing unit 31 serving as 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 70 which will be described in detail later. The brushless motor 33 is configured in the same manner as a normal brushless motor. That is, the brushless motor 33 includes a rotor that rotates integrally with the motor shaft 35, a stator that rotates the rotor, and a sensor substrate that detects the rotational position of the rotor, although not shown. A permanent magnet is attached to the rotor. The stator generates a magnetic force when a coil is wound and a current flows. The sensor substrate is disposed on the front side of the rotor and detects the rotational position of the rotor.
モータ軸35は、前後方向に延びるように配置される。モータ軸35は、前側がモータハウジング部31に支持される前側ベアリング351に支持されており、後側がキャップ部材32に支持される後側ベアリング352に支持されている。モータ軸35の後部には、モータ軸35と一体に回転するファン36が取り付けられている。ファン36は、ロータの後側であり且つ後側ベアリング352の前側のモータ軸35に取り付けられている。ファン36は遠心式ファンにより構成される。ファン36は、モータ軸35と一体回転することにより、排気スリット361を通じてステータを冷却した冷却風を外部に排気する。これに対し、モータ軸35の前端には入力ギヤ37が取り付けられる。入力ギヤ37は、次に説明するハンマ部40の減速機構41の遊星歯車42と噛合している。
The motor shaft 35 is disposed so as to extend in the front-rear direction. The front side of the motor shaft 35 is supported by a front bearing 351 supported by the motor housing portion 31, and the rear side is supported by a rear bearing 352 supported by the cap member 32. A fan 36 that rotates integrally with the motor shaft 35 is attached to the rear portion of the motor shaft 35. The fan 36 is attached to the motor shaft 35 on the rear side of the rotor and on the front side of the rear bearing 352. The fan 36 is a centrifugal fan. The fan 36 rotates integrally with the motor shaft 35 to exhaust the cooling air that has cooled the stator through the exhaust slit 361 to the outside. On the other hand, an input gear 37 is attached to the front end of the motor shaft 35. The input gear 37 meshes with a planetary gear 42 of a speed reduction mechanism 41 of the hammer portion 40 described below.
図3および図4に示すように、左側分割ハウジング15と右側分割ハウジング16とが合体してなるモータハウジング部31の後端は開口(図4の図示符号311)され、該開口はキャップ部材32(図1および図2参照)により閉塞されている。キャップ部材32は、左側分割ハウジング15および右側分割ハウジング16の後部に係止してモータハウジング部31と一体となっている。キャップ部材32は、略中央箇所で後側ベアリング352を保持する。
As shown in FIGS. 3 and 4, the rear end of the motor housing portion 31 formed by combining the left divided housing 15 and the right divided housing 16 is opened (reference numeral 311 in FIG. 4), and the opening is a cap member 32. (See FIGS. 1 and 2). The cap member 32 is integrated with the motor housing portion 31 by being locked to the rear portions of the left divided housing 15 and the right divided housing 16. The cap member 32 holds the rear bearing 352 at a substantially central location.
図1に示すように、キャップ部材32には、外部と内部とを連通する排気スリット361が設けられている。排気スリット361は、ファン36の外周の対面範囲に亘って多数並んでキャップ部材32に設けられている。
As shown in FIG. 1, the cap member 32 is provided with an exhaust slit 361 that allows communication between the outside and the inside. A large number of exhaust slits 361 are provided in the cap member 32 so as to be lined up over the facing range of the outer periphery of the fan 36.
なお、図4に良く示されるように、左側分割ハウジング15と右側分割ハウジング16との間では、8つの螺子止め箇所(図示符号18)で合体保持がされている。具体的には、バッテリ装着部13で螺子止め箇所(図示符号18)を2つ設けており、グリップ部20で螺子止め箇所(図示符号18)を2つ設けており、モータ部30およびハンマ部40のそれぞれで螺子止め箇所(図示符号18)を1つずつ設けている。
Note that, as well shown in FIG. 4, the left split housing 15 and the right split housing 16 are held together at eight screwing points (indicated by reference numeral 18). Specifically, the battery mounting part 13 is provided with two screwing points (indicated by reference numeral 18), the grip part 20 is provided with two screwing points (indicated by reference numeral 18), the motor part 30 and the hammer part. Each of 40 is provided with one screwing point (reference numeral 18).
図1および図2に示すように、モータ部30の前側にはハンマ部40が配置されている。ハンマ部40は、モータハウジング部31に支持される。ハンマ部40は、概略、減速機構41と打撃機構61とを有する。減速機構41は、モータ軸35の回転駆動を減速して打撃機構61に入力する。減速機構41はベアリングボックス50に支持され、打撃機構61はハンマケース70に支持される。これらベアリングボックス50およびハンマケース70を説明する前に、これらに内装支持される減速機構41および打撃機構61を説明する。なお、減速機構41が、本発明に係る第1動力伝達機構に相当する。また、打撃機構61が、本発明に係る本発明に係る第2動力伝達機構に相当する。また、減速機構41および打撃機構61が、本発明に係る動力伝達機構に相当する。つまり、減速機構41および打撃機構61は、モータハウジング部31の出力側に配置される。
As shown in FIG. 1 and FIG. 2, a hammer part 40 is arranged on the front side of the motor part 30. The hammer part 40 is supported by the motor housing part 31. The hammer part 40 generally includes a speed reduction mechanism 41 and a striking mechanism 61. The speed reduction mechanism 41 decelerates the rotational drive of the motor shaft 35 and inputs it to the striking mechanism 61. The speed reduction mechanism 41 is supported by the bearing box 50, and the striking mechanism 61 is supported by the hammer case 70. Before describing the bearing box 50 and the hammer case 70, the reduction mechanism 41 and the striking mechanism 61 that are internally supported by the bearing box 50 and the hammer case 70 will be described. The speed reduction mechanism 41 corresponds to the first power transmission mechanism according to the present invention. The striking mechanism 61 corresponds to the second power transmission mechanism according to the present invention. Further, the speed reduction mechanism 41 and the striking mechanism 61 correspond to a power transmission mechanism according to the present invention. That is, the speed reduction mechanism 41 and the striking mechanism 61 are disposed on the output side of the motor housing portion 31.
減速機構41は、広く利用される遊星歯車機構で構成される。減速機構41は、図3に示すように上記した入力ギヤ37と噛合する3つの遊星歯車42を有する。遊星歯車42は、出力側に配置されるキャリア47に支軸46を介して回転可能に支持されている。この遊星歯車42は、さらに外周側に配置されるインターナルギヤ45と噛合している。つまり、遊星歯車42は、噛合する入力ギヤ37から回転駆動力が伝達されて自転し、噛合するインターナルギヤ45内で公転する。この遊星歯車42の公転がキャリア47の回転となり。キャリア47は、一体にされる駆動軸62を一体に回転させる。
The deceleration mechanism 41 is composed of a widely used planetary gear mechanism. As shown in FIG. 3, the speed reduction mechanism 41 has three planetary gears 42 that mesh with the input gear 37 described above. 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 integrally rotates the drive shaft 62 that is integrated.
図2に示すように、キャリア47は、後側のベアリング48とアンビル66内に設けられる収容凹部669とにより回転支持される。ベアリング48はベアリングボックス50に支持され、インターナルギヤ45はベアリングボックス50内で相対回転不可に固定保持される。つまり、キャリア47は本発明に係る動力伝達部材に相当し、ベアリング48は本発明に係る支持部に相当する。インターナルギヤ45は、ベアリングボックス50内に係止される止め輪49にて、ベアリングボックス50内からの外れが規制されている。
As shown in FIG. 2, the carrier 47 is rotatably supported by a rear bearing 48 and an accommodation recess 669 provided in the anvil 66. The bearing 48 is supported by the bearing box 50, and the internal gear 45 is fixed and held in the bearing box 50 so as not to be relatively rotatable. That is, the carrier 47 corresponds to the power transmission member according to the present invention, and the bearing 48 corresponds to the support portion according to the present invention. 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.
図2に示すように、打撃機構61は、概略、駆動軸62と鋼球63とハンマ64と圧縮ばね65とアンビル66とを有する。これらの駆動軸62と鋼球63とハンマ64と圧縮ばね65とアンビル66とは、ハンマケース70内に収容支持される。駆動軸62は、一体にされたキャリア47と共に回転駆動する。駆動軸62の周面には、鋼球保持凹部621が設けられている。この鋼球保持凹部621は、超硬球の鋼球63の半分を収容可能な凹形に形成される。この鋼球保持凹部621の凹形は、前後方向に傾斜して延びる凹形となっている。つまり、鋼球63は、傾斜方向に延びる鋼球保持凹部621内で転動可能となっている。
As shown in FIG. 2, the striking mechanism 61 generally includes a drive shaft 62, a steel ball 63, a hammer 64, a compression spring 65, and an anvil 66. The drive shaft 62, the steel ball 63, the hammer 64, the compression spring 65, and the anvil 66 are housed and supported in the hammer case 70. The drive shaft 62 is rotationally driven together with the integrated carrier 47. A steel ball holding recess 621 is provided on the peripheral surface of the drive shaft 62. The steel ball holding recess 621 is formed in a concave shape capable of accommodating half of the super hard sphere steel ball 63. The concave shape of the steel ball holding concave portion 621 is a concave shape extending in the front-rear direction. That is, the steel ball 63 can roll in the steel ball holding recess 621 extending in the tilt direction.
これに対し、適宜の重量を有するハンマ64にも、鋼球63が転動するガイド溝641が設けられている。このガイド溝641は、鋼球保持凹部621と相対回転により対面可能とされる箇所に設けられている。このガイド溝641も、超硬球の鋼球63の半分を収容可能な凹形に形成される。このガイド溝641の凹形は、前後方向に延びる凹形となっている。つまり、鋼球63は、前後方向に延びるガイド溝641内で転動可能となっている。また、ハンマ64には、圧縮ばね65を収容する収容凹部643が設けられている。この収容凹部643は、前後方向で抉られる凹形をなしている。この収容凹部643の前側の内端に圧縮ばね65の前端が当接する。
In contrast, a hammer 64 having an appropriate weight is also provided with a guide groove 641 on which the steel ball 63 rolls. The guide groove 641 is provided at a location where it can face the steel ball holding recess 621 by relative rotation. The guide groove 641 is also formed in a concave shape that can accommodate half of the superhard steel ball 63. The concave shape of the guide groove 641 is a concave shape extending in the front-rear direction. That is, the steel ball 63 can roll in the guide groove 641 extending in the front-rear direction. The hammer 64 is provided with a housing recess 643 for housing the compression spring 65. The housing recess 643 has a concave shape that is bent in the front-rear direction. The front end of the compression spring 65 contacts the inner end on the front side of the housing recess 643.
圧縮ばね65は、コイルばねを圧縮させてなる。この圧縮ばね65は、後端がキャリア47に当接支持され、前端が収容凹部643内で当接支持され、常時ハンマ64を前方に付勢している。ハンマ64の前面には、打撃片部645が前方に突出して設けられている。打撃片部645は、アンビル66の後端に設けられる打撃アーム部665に当たる突出形状をなす。なお、打撃片部645は、ハンマ64の前面にて周方向180度間隔で2つ設けられている。また、打撃アーム部665も、アンビル66の後端にて周方向180度間隔で2つ設けられている。
The compression spring 65 is formed by compressing a coil spring. The compression spring 65 has a rear end in contact with and supported by the carrier 47 and a front end in contact with and supported in the housing recess 643 to constantly urge the hammer 64 forward. A striking piece 645 is provided on the front surface of the hammer 64 so as to protrude forward. The striking piece 645 has a protruding shape that hits a striking arm 665 provided at the rear end of the anvil 66. Two hitting piece portions 645 are provided on the front surface of the hammer 64 at intervals of 180 degrees in the circumferential direction. Two striking arm portions 665 are also provided at the rear end of the anvil 66 at intervals of 180 degrees in the circumferential direction.
この打撃アーム部665は、打撃片部645と対面する位置まで、アンビル本体661の後端から径方向外側にアーム形に延びている。アンビル66は、アンビル本体661と上記した打撃アーム部665とを有する。アンビル本体661は、前後方向に延びる略円筒形状に形成される。アンビル本体661の外周は、ニードルベアリング663に当接される。ニードルベアリング663は、ハンマケース70の前部で保持されてアンビル66を回転支持する。アンビル本体661の前端には、ビットBを保持するためのビット保持機構67が設けられている。ビット保持機構67は、軸方向に延びるアンビル本体661の内部662に収容したビットBを保持する。
The striking arm portion 665 extends in an arm shape radially outward from the rear end of the anvil body 661 to a position facing the striking piece portion 645. The anvil 66 has an anvil body 661 and the hitting arm portion 665 described above. The anvil body 661 is formed in a substantially cylindrical shape that extends in the front-rear direction. The outer periphery of the anvil body 661 is in contact with the needle bearing 663. The needle bearing 663 is held at the front portion of the hammer case 70 and rotatably supports the anvil 66. A bit holding mechanism 67 for holding the bit B is provided at the front end of the anvil body 661. The bit holding mechanism 67 holds the bit B accommodated in the interior 662 of the anvil body 661 extending in the axial direction.
打撃機構61は、次のように作動する。すなわち、アンビル66の回転動作に所定値以上のトルクが加わると、駆動軸62とハンマ64との間に回転方向で相対変位が生ずることとなる。この相対変位は、鋼球保持凹部621およびガイド溝641の両者内部で、圧縮ばね65の付勢力に抗して鋼球63を移動させる作用を奏する。そうすると、ハンマ64は駆動軸62に対して相対的に後退することとなり、それまで打撃アーム部665に当接していた打撃片部645は打撃アーム部665から外れることとなる。このように打撃片部645が打撃アーム部665から外れると、ハンマ64は瞬間的に空転することとなり、圧縮ばね65の付勢力を受けて再び打撃アーム部665に当たる。この当たりこそが、アンビル66の回転動作に加えられる打撃力である。
The striking mechanism 61 operates as follows. That is, when a torque of a predetermined value or more is applied to the rotation operation of the anvil 66, a relative displacement is generated between the drive shaft 62 and the hammer 64 in the rotation direction. This relative displacement has the effect of moving the steel ball 63 against the urging force of the compression spring 65 inside both the steel ball holding recess 621 and the guide groove 641. As a result, the hammer 64 moves backward relative to the drive shaft 62, and the hitting piece portion 645 that has been in contact with the hitting arm portion 665 until then is detached from the hitting arm portion 665. When the striking piece portion 645 is detached from the striking arm portion 665 as described above, the hammer 64 is idled instantaneously, and receives the urging force of the compression spring 65 and again strikes the striking arm portion 665. This hit is the striking force applied to the rotating motion of the anvil 66.
次に、上記した減速機構41を収容保持するベアリングボックス50と、上記した打撃機構61を収容保持するハンマケース70を説明する。なお、ベアリングボックス50が、本発明に係る後部ケースおよび本発明に係る第1ケースに相当する。また、ハンマケース70が、本発明に係る前部ケースおよび本発明に係る第2ケースに相当する。また、ベアリングボックス50およびハンマケース70が、本発明に係るケースに相当する。つまり、ベアリングボックス50およびハンマケース70の両者は、互いが一体となるケース形をなしている。逆に言えば、一体可能となるベアリングボックス50とハンマケース70とは、前後方向で分離可能に形成されている。これらベアリングボックス50とハンマケース70との両者の内部には、上記した減速機構41および打撃機構61が収容保持される。また、ベアリングボックス50は、本発明に係る前部ケースおよび後部ケースのいずれか一方に相当すると共に、本発明に係る第1ケースおよび第2ケースのいずれか一方に相当する。これに対し、ハンマケース70は、本発明に係る前部ケースおよび後部ケースのいずれか他方に相当すると共に、本発明に係る第1ケースおよび第2ケースのいずれか他方に相当する。
Next, the bearing box 50 that accommodates and holds the above-described reduction mechanism 41 and the hammer case 70 that accommodates and holds the hitting mechanism 61 will be described. The bearing box 50 corresponds to the rear case according to the present invention and the first case according to the present invention. The hammer case 70 corresponds to the front case according to the present invention and the second case according to the present invention. Further, the bearing box 50 and the hammer case 70 correspond to the case according to the present invention. That is, both the bearing box 50 and the hammer case 70 have a case shape in which they are integrated with each other. In other words, the bearing box 50 and the hammer case 70 that can be integrated with each other are formed to be separable in the front-rear direction. Inside the bearing box 50 and the hammer case 70, the speed reduction mechanism 41 and the striking mechanism 61 are accommodated and held. The bearing box 50 corresponds to one of the front case and the rear case according to the present invention, and corresponds to either the first case or the second case according to the present invention. On the other hand, the hammer case 70 corresponds to the other of the front case and the rear case according to the present invention, and corresponds to the other of the first case and the second case according to the present invention.
図4および図5に示すように、ベアリングボックス50およびハンマケース70は、両者ともに金属にて成形されている。ベアリングボックス50は、円環状の周壁本体51を有する。この周壁本体51の後端縁には、内フランジ形に形成される後壁部52が連接されている。この後壁部52の中央には、入力ギヤ37をベアリングボックス50の内部に差込可能とする開口部521が設けられている。この開口部521の周縁近くには、ベアリング48を収容支持するベアリング収容支持部522が設けられている。これに対し、周壁本体51の前端縁には、後壁部52のような内フランジ形は無く、ハンマケース70の内部に向けて開口されている。ベアリングボックス50の周壁本体51の上部には、左右両側に対をなして左側張出し部55および右側張出し部56が設けられている。左側張出し部55および右側張出し部56は、周壁本体51の周面からアンビル66の回転径方向外側に凸をなすように突出して設けられている。
As shown in FIGS. 4 and 5, the bearing box 50 and the hammer case 70 are both formed of metal. The bearing box 50 has an annular peripheral wall body 51. A rear wall 52 formed in an inner flange shape is connected to the rear end edge of the peripheral wall main body 51. In the center of the rear wall portion 52, an opening portion 521 that allows the input gear 37 to be inserted into the bearing box 50 is provided. Near the periphery of the opening 521, a bearing accommodating support 522 that accommodates and supports the bearing 48 is provided. On the other hand, the front end edge of the peripheral wall body 51 does not have an inner flange shape like the rear wall portion 52, and opens toward the inside of the hammer case 70. On the upper part of the peripheral wall main body 51 of the bearing box 50, a left overhang portion 55 and a right overhang portion 56 are provided in pairs on the left and right sides. The left projecting portion 55 and the right projecting portion 56 are provided so as to protrude from the peripheral surface of the peripheral wall body 51 so as to protrude outward in the rotational radial direction of the anvil 66.
図3に示すように、左側張出し部55および右側張出し部56は、アンビル66(出力軸)の軸線に対して左右対称に設けられている。これら左側張出し部55および右側張出し部56は、周壁本体51の上方の頂点511よりも下側の周壁本体51に対して設けられている。また、これら左側張出し部55および右側張出し部56は、周壁本体51の左方および右方の側方の頂点513,514よりも上側の周壁本体51に対して設けられている。なお、左側張出し部55は、左方の頂点513よりも右側に位置しており、右側張出し部56は右方の頂点514よりも左側に位置している。すなわち、左側張出し部55および右側張出し部56には、双方ともに上方に面する上面部551,561が設けられている。左側張出し部55および右側張出し部56には、双方ともに側方(左側、右側)に面する側面部552,562が設けられている。
As shown in FIG. 3, the left overhang 55 and the right overhang 56 are provided symmetrically with respect to the axis of the anvil 66 (output shaft). The left overhang 55 and the right overhang 56 are provided on the peripheral wall main body 51 below the upper vertex 511 of the peripheral wall main body 51. Further, the left overhanging portion 55 and the right overhanging portion 56 are provided on the peripheral wall main body 51 above the left and right side apexes 513 and 514 of the peripheral wall main body 51. The left overhang 55 is located on the right side of the left apex 513, and the right overhang 56 is located on the left side of the right apex 514. That is, the left overhang 55 and the right overhang 56 are provided with upper surface portions 551 and 561 that both face upward. The left overhanging portion 55 and the right overhanging portion 56 are provided with side surface portions 552 and 562 that face the sides (left and right sides).
図4~図6に示すように、上面部551,561は、水平方向に延びる面形状を有して形成されている。側面部552,562は鉛直方向に延びる面形状を有して形成されている。このため、左側張出し部55および右側張出し部56は、上方および側方に面する面形状により、略矩形の角が回転径方向外側に突出して設けられている。これら側面部552,562には、それぞれに雌螺子部57,58が設けられている。雌螺子部57,58は、左側張出し部55および右側張出し部56に対して、互いに向かい合う水平方向で雌螺子に切られて形成されている。これら螺子部57,58には、出力軸としてのアンビル66の軸方向と交差する方向に雄螺子部材80が螺子止めされる。つまり、これら雌螺子部57,58は、アンビル66の軸方向と直交交差する左右方向で螺子止め可能とする雌螺子である。また、雄螺子部材80は、この雌螺子部57,58に対して螺子止めする雌螺子であり、同様にアンビル66の軸方向と直交交差する左右方向で螺合する。なお、雌螺子部57,58は本発明に係る雌螺子および保持部に相当し、雄螺子部材80は本発明に係る雄螺子および差込部材に相当する。
As shown in FIGS. 4 to 6, the upper surface portions 551 and 561 are formed to have a surface shape extending in the horizontal direction. The side surface portions 552 and 562 are formed to have a surface shape extending in the vertical direction. For this reason, the left overhanging portion 55 and the right overhanging portion 56 are provided so that substantially rectangular corners protrude outward in the rotational radial direction due to the surface shape facing upward and laterally. These side portions 552 and 562 are provided with female screw portions 57 and 58, respectively. The female screw portions 57 and 58 are formed by being cut into female screws in the horizontal direction facing each other with respect to the left overhang portion 55 and the right overhang portion 56. A male screw member 80 is screwed to these screw portions 57 and 58 in a direction crossing the axial direction of the anvil 66 as an output shaft. That is, these female screw portions 57 and 58 are female screws that can be screwed in the left-right direction orthogonal to the axial direction of the anvil 66. The male screw member 80 is a female screw that is screwed to the female screw portions 57 and 58, and is similarly screwed in the left-right direction orthogonal to the axial direction of the anvil 66. The female screw portions 57 and 58 correspond to the female screw and the holding portion according to the present invention, and the male screw member 80 corresponds to the male screw and the insertion member according to the present invention.
さらに、図4に示すように、ハンマケース70には、ベアリングボックス50の周壁本体51に設けられる左側張出し部55および右側張出し部56に対応した、左側嵌合部75および右側嵌合部76が設けられている。これら左側嵌合部75および右側嵌合部76も、左右両側に対をなして突出して設けられている。左側嵌合部75および右側嵌合部76は、ベアリングボックス50に対してハンマケース70を前後方向で組み付けることにより、左側張出し部55および右側張出し部56を両者同時に内部に嵌合可能に設けられている。つまり、左側嵌合部75は、左側張出し部55の外部形状に対応した内部形状を有して形成される。また、右側嵌合部76は、右側張出し部56の外部形状に対応した内部形状を有して形成される。
Further, as shown in FIG. 4, the hammer case 70 has a left side fitting part 75 and a right side fitting part 76 corresponding to the left side extension part 55 and the right side extension part 56 provided on the peripheral wall body 51 of the bearing box 50. Is provided. The left fitting portion 75 and the right fitting portion 76 are also provided so as to protrude in pairs on the left and right sides. The left side fitting part 75 and the right side fitting part 76 are provided so that the left overhanging part 55 and the right overhanging part 56 can be fitted inside at the same time by assembling the hammer case 70 to the bearing box 50 in the front-rear direction. ing. That is, the left fitting portion 75 is formed to have an internal shape corresponding to the external shape of the left overhang portion 55. The right fitting portion 76 has an internal shape corresponding to the external shape of the right overhang portion 56.
これら左側嵌合部75および右側嵌合部76の内部には、左側張出し部55および右側張出し部56を嵌合可能な適宜の空間形状を有して形成される。図5に示すように、左側嵌合部75および右側嵌合部76が左側張出し部55および右側張出し部56に嵌合した場合には、この回転径方向外側に突出した嵌合がハンマケース70のベアリングボックス50に対する周方向の回りの規制することとなる。つまり、ベアリングボックス50とハンマケース70との間の相対回転は規制される。このように、これら左側嵌合部75および右側嵌合部76の左側張出し部55および右側張出し部56の嵌合は、アンビル66の回転径方向外側に凸をなすことにより嵌め合わされる嵌合構造として設定されている。
The left fitting portion 75 and the right fitting portion 76 are formed with an appropriate space shape into which the left protruding portion 55 and the right protruding portion 56 can be fitted. As shown in FIG. 5, when the left fitting portion 75 and the right fitting portion 76 are fitted to the left protruding portion 55 and the right protruding portion 56, the fitting protruding outward in the rotational radial direction is the hammer case 70. This restricts the circumference of the bearing box 50 in the circumferential direction. That is, the relative rotation between the bearing box 50 and the hammer case 70 is restricted. Thus, the fitting of the left overhanging portion 55 and the right overhanging portion 56 of the left fitting portion 75 and the right fitting portion 76 is fitted by projecting outwardly in the rotation radial direction of the anvil 66. Is set as
左側嵌合部75および右側嵌合部76にも、双方ともに上方に面する上面部751,761が設けられており、双方ともに側方(左側、右側)に面する側面部752,762が設けられている。これら側面部752,762には、左右方向に貫通された差込孔77,78が設けられている。この差込孔77,78は、差込部材としての雄螺子部材80を差込可能とする貫通孔である。この差込孔77,78は、本発明に係る差込部に相当する。ハンマケース70にベアリングボックス50を組み付けて、左側嵌合部75および右側嵌合部76に左側張出し部55および右側張出し部56を嵌合させた場合に、雄螺子部材80は、差込孔77,78を通じて雌螺子部57,58に螺子止め可能となる。
The left fitting portion 75 and the right fitting portion 76 are also provided with upper surface portions 751 and 761 that both face upward, and both have side surface portions 752 and 762 that face sideways (left and right sides). It has been. The side surface portions 752 and 762 are provided with insertion holes 77 and 78 penetrating in the left-right direction. The insertion holes 77 and 78 are through holes that allow the male screw member 80 as an insertion member to be inserted. The insertion holes 77 and 78 correspond to the insertion portion according to the present invention. When the bearing box 50 is assembled to the hammer case 70 and the left overhanging portion 55 and the right overhanging portion 56 are fitted into the left fitting portion 75 and the right fitting portion 76, the male screw member 80 is inserted into the insertion hole 77. , 78 can be screwed to the female screw portions 57, 58.
図3および図4に示すように、モータハウジング部31にも、ベアリングボックス50の周壁本体51に設けられる左側張出し部55および右側張出し部56に対応した、左側外周部85および右側外周部86が設けられている。これら左側外周部85および右側外周部86も、モータハウジング部31の左右両側に対をなして突出して設けられている。左側外周部85は、ベアリングボックス50に組み付けたハンマケース70に左側分割ハウジング15を組み付けた際、左側張出し部55を嵌合した左側嵌合部75を内部に嵌合可能に設けられている。また、右側外周部86は、ベアリングボックス50に組み付けたハンマケース70に右側分割ハウジング16を組み付けた際、右側張出し部56を嵌合した右側嵌合部76を内部に嵌合可能に設けられている。
As shown in FIGS. 3 and 4, the motor housing portion 31 also has a left outer peripheral portion 85 and a right outer peripheral portion 86 corresponding to the left projecting portion 55 and the right projecting portion 56 provided on the peripheral wall body 51 of the bearing box 50. Is provided. The left outer peripheral portion 85 and the right outer peripheral portion 86 are also provided so as to protrude in pairs on the left and right sides of the motor housing portion 31. The left outer peripheral portion 85 is provided so that a left fitting portion 75 fitted with the left overhang portion 55 can be fitted therein when the left divided housing 15 is assembled to the hammer case 70 assembled to the bearing box 50. The right outer peripheral portion 86 is provided so that a right fitting portion 76 fitted with a right overhang portion 56 can be fitted therein when the right divided housing 16 is assembled to the hammer case 70 assembled to the bearing box 50. Yes.
具体的には、左側外周部85は、左側嵌合部75の外部形状に対応した内部形状を有して形成される。また、右側外周部86は、右側嵌合部76の外部形状に対応した内部形状を有して形成される。これら左側外周部85および右側外周部86の内部には、左側嵌合部75および右側嵌合部76を嵌合可能な適宜の空間形状を有して形成される。左側外周部85および右側外周部86が左側嵌合部75および右側嵌合部76を嵌合した場合には、この回転径方向外側に突出した嵌合がハンマケース70のモータハウジング部31に対する周方向の回りの規制することとなる。つまり、ハンマケース70とモータハウジング部31との間の相対回転は規制される。
Specifically, the left outer peripheral portion 85 is formed to have an internal shape corresponding to the external shape of the left fitting portion 75. Further, the right outer peripheral portion 86 is formed having an internal shape corresponding to the external shape of the right fitting portion 76. The left outer peripheral portion 85 and the right outer peripheral portion 86 are formed with appropriate space shapes into which the left fitting portion 75 and the right fitting portion 76 can be fitted. When the left outer peripheral portion 85 and the right outer peripheral portion 86 are engaged with the left fitting portion 75 and the right fitting portion 76, the fitting protruding outward in the rotational radial direction is the circumference of the hammer case 70 with respect to the motor housing portion 31. It will be restricted around the direction. That is, the relative rotation between the hammer case 70 and the motor housing portion 31 is restricted.
左側外周部85および右側外周部86にも、双方ともに上方に面する上面部851,861が設けられており、双方ともに側方(左側、右側)に面する側面部852,862が設けられている。これら側面部852,862にも、左右方向に貫通された差込孔87,88が設けられている。差込孔87,88も、雄螺子部材80を差込可能とする貫通孔である。ベアリングボックス50を組み付けたハンマケース70に左側分割ハウジング15を組み付けた場合、左側外周部85は左側張出し部55の外側の左側嵌合部75に被さる。また、ベアリングボックス50を組み付けたハンマケース70に右側分割ハウジング16を組み付けた場合、右側外周部86は右側張出し部56の外側の右側嵌合部76に被さる。そうすると、左側の雄螺子部材80は、差込孔77,87を通じて雌螺子部57に螺子止め可能となり、右側の雄螺子部材80は、差込孔78,88を通じて雌螺子部58に螺子止め可能となる。つまり、モータハウジング部31は、雄螺子部材80を介して雌螺子部57,58に対してハンマケース70と共に共締めされることとなる。
The left outer peripheral portion 85 and the right outer peripheral portion 86 are both provided with upper surface portions 851 and 861 facing upward, and both are provided with side surface portions 852 and 862 facing laterally (left and right sides). Yes. The side surface portions 852 and 862 are also provided with insertion holes 87 and 88 penetrating in the left-right direction. The insertion holes 87 and 88 are also through holes that allow the male screw member 80 to be inserted. When the left split housing 15 is assembled to the hammer case 70 to which the bearing box 50 is assembled, the left outer peripheral portion 85 covers the left fitting portion 75 outside the left overhang portion 55. When the right split housing 16 is assembled to the hammer case 70 to which the bearing box 50 is assembled, the right outer peripheral portion 86 covers the right fitting portion 76 outside the right overhang portion 56. Then, the left male screw member 80 can be screwed to the female screw portion 57 through the insertion holes 77 and 87, and the right male screw member 80 can be screwed to the female screw portion 58 through the insertion holes 78 and 88. It becomes. That is, the motor housing portion 31 is fastened together with the hammer case 70 to the female screw portions 57 and 58 via the male screw member 80.
上記した実施の形態のインパクトドライバ10によれば、次の作用効果を奏する。
According to the impact driver 10 of the above-described embodiment, the following operational effects are achieved.
先ず、上記したインパクトドライバ10によれば、モータハウジング部31は雄螺子部材80を介して雌螺子部57,58に螺子止めされるにあたり、アンビル66の軸方向と直交交差する方向で螺子止めされる。これによって、差込孔77,78に差し込まれながら雌螺子部57,58に螺子止めされた雄螺子部材80は、ベアリングボックス50に対するモータハウジング部31の相対移動を規制することができる。これによって、ベアリングボックス50に対するモータハウジング部31の相対移動を規制するにあたって、従来のようなアンビル66が延びる軸方向に雄螺子部材を配置することが無くなり、この配置されていた箇所のスリム化を図ることができる。したがって、インパクトドライバ10として使用する場合の取回しの良さを向上させることができる。
First, according to the impact driver 10 described above, when the motor housing portion 31 is screwed to the female screw portions 57 and 58 via the male screw member 80, the motor housing portion 31 is screwed in a direction orthogonal to the axial direction of the anvil 66. The Accordingly, the male screw member 80 screwed into the female screw portions 57 and 58 while being inserted into the insertion holes 77 and 78 can restrict the relative movement of the motor housing portion 31 with respect to the bearing box 50. As a result, when the relative movement of the motor housing portion 31 with respect to the bearing box 50 is restricted, there is no need to place a male screw member in the axial direction in which the anvil 66 extends as in the prior art, and the place where it is placed can be made slim. Can be planned. Therefore, it is possible to improve the handling efficiency when used as the impact driver 10.
また、上記したインパクトドライバ10によれば、ハンマケース70およびベアリングボックス50のそれぞれには、アンビル66の回転径方向に凸をなすことにより互いに嵌め合わされる嵌合構造55,56,75,76が設けられている。これによって、ベアリングボックス50に対するハンマケース70の相対的な回り止め作用を奏することができる。したがって、ベアリングボックス50に対するハンマケース70の相対位置を固定させておくことができ、ベアリングボックス50とハンマケース70とが外れ難いものとした製品としての安定性を高めることができる。また、上記したインパクトドライバ10によれば、この嵌合構造をなす箇所(図示符号55(56),75(76),85(86))に対して雄螺子部材80を介して雌螺子部57,58に螺子止めする構造が設けられている。これによって、機能を複数有して張り出された構造を設けることができて、スリム化を図りながら回り止め作用を効率良く奏することができる。
Further, according to the impact driver 10 described above, the hammer case 70 and the bearing box 50 have the fitting structures 55, 56, 75, and 76 that are fitted to each other by projecting in the rotational radial direction of the anvil 66. Is provided. Accordingly, the relative rotation of the hammer case 70 with respect to the bearing box 50 can be exerted. Therefore, the relative position of the hammer case 70 with respect to the bearing box 50 can be fixed, and the stability of the product that makes it difficult for the bearing box 50 and the hammer case 70 to come off can be enhanced. Further, according to the impact driver 10 described above, the female screw portion 57 via the male screw member 80 with respect to the place (illustrated reference numerals 55 (56), 75 (76), 85 (86)) forming this fitting structure. , 58 are screwed. As a result, an overhanging structure having a plurality of functions can be provided, and an anti-rotation effect can be efficiently achieved while achieving slimming.
ところで、図6の前側斜視図は図5とは相違するベアリングボックス50Aとハンマケース70Aを組み付ける前の状態を図示する。この図6の例でも、動力伝達機構40Aは、ハンマケース70Aとベアリングボックス50Aに内装されるものとなっている。ここで、ハンマケース70Aとベアリングボックス50Aとは、雄螺子54と雌螺子74とにより螺合して一体となるように構成される。すなわち、ベアリングボックス50Aの周壁本体51に前部外周には雄螺子54が形成されている。これに対し、ハンマケース70の後部内周には雌螺子74が形成されている。なお、図6の例では、上記した嵌合構造をなす箇所はハンマケース70Aには設定されず、上記した左側外周部85および右側外周部86が、左側張出し部55および右側張出し部56に直接被されるものとなっている。
Incidentally, the front perspective view of FIG. 6 illustrates a state before the bearing box 50A and the hammer case 70A, which are different from those in FIG. 5, are assembled. In the example of FIG. 6 as well, the power transmission mechanism 40A is housed in the hammer case 70A and the bearing box 50A. Here, the hammer case 70 </ b> A and the bearing box 50 </ b> A are configured so as to be integrated with each other by a male screw 54 and a female screw 74. That is, a male screw 54 is formed on the outer periphery of the front portion of the peripheral wall body 51 of the bearing box 50A. On the other hand, a female screw 74 is formed on the inner periphery of the rear part of the hammer case 70. In the example of FIG. 6, the portion having the above-described fitting structure is not set in the hammer case 70 </ b> A, and the left outer peripheral portion 85 and the right outer peripheral portion 86 are directly connected to the left overhang portion 55 and the right overhang portion 56. It is to be covered.
ここで、雄螺子54の雌螺子74に対する螺子締め方向は、打撃機構61の打撃作用方向(アンビル66の回転方向)と一致している。すなわち、ハンマケース70は、打撃機構61の打撃反作用が作用するが、この打撃反作用の作用を受けて雌螺子74に対して雄螺子54は螺子締め方向に回ることとなる。これによって、雄螺子54は雌螺子74に対して打撃反作用を受けても外れないようになって、ベアリングボックス50に対するハンマケース70の相対位置を緩ませることなく固定させておくことができる。
Here, the screw tightening direction of the male screw 54 with respect to the female screw 74 coincides with the striking action direction of the striking mechanism 61 (the rotation direction of the anvil 66). That is, the hammer case 70 is subjected to the striking reaction of the striking mechanism 61, and the male screw 54 rotates in the screw tightening direction with respect to the female screw 74 due to this striking reaction. As a result, the male screw 54 does not come off even when subjected to a striking reaction against the female screw 74, and the relative position of the hammer case 70 with respect to the bearing box 50 can be fixed without loosening.
なお、本発明に係る回転工具にあっては、上記した実施の形態に限定されるものではなく適宜に変更を加えて構成することが可能である。
Note that the rotary tool according to the present invention is not limited to the above-described embodiment, and can be configured with appropriate modifications.
例えば、上記した実施の形態では、回転工具の一例としてインパクトドライバ10を挙げ、これを説明するものとした。しかしながら、本発明に係る回転工具にあっては、インパクトレンチや、ドライバドリルや、ハンマドリルなどで構成されるものであってもよく、適宜の回転あるいは回転打撃を発生させる電動工具を選択することができる。その場合には、動力伝達機構としては、上記した実施の形態に限定されることなく、適宜の機構を採用することができる。
For example, in the above-described embodiment, the impact driver 10 is cited as an example of the rotary tool, and this will be described. 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.
また、動力伝達機構としては複数の機構を有して構成されるものであってもよく、ケースとしても複数に分割されて構成されるものであってもよい。
Further, the power transmission mechanism may be configured by having a plurality of mechanisms, and may be configured by being divided into a plurality of cases as well.
また、上記した実施の形態では、本発明に係る保持部を雌螺子部57,58で形成し、本発明に係る差込部材を雄螺子部材80で形成した。しかしながら、本発明に係る保持部は、差込部材を保持可能に形成されていればよいものとされ、例えば差込部材を保持可能な孔で形成されるものであってもよい。このような場合の差込部材は、保持部としての孔に嵌入可能なピン形の部材で形成されることとなる。
In the above-described embodiment, the holding portion according to the present invention is formed by the female screw portions 57 and 58, and the insertion member according to the present invention is formed by the male screw member 80. However, the holding | maintenance part which concerns on this invention should just be formed so that the insertion member can be hold | maintained, for example, may be formed with the hole which can hold | maintain an insertion member. The insertion member in such a case is formed of a pin-shaped member that can be inserted into the hole as the holding portion.
Claims (8)
- 出力軸を回転動作させる回転工具であって、
モータと、該モータを収容するモータハウジングと、該モータの駆動力を前記出力軸に伝達する動力伝達機構とを有し、
前記動力伝達機構を内装するケースには、前記出力軸の軸方向と交差する方向に差し込まれる差込部材を保持する保持部が設けられており、
前記モータハウジングには、前記差込部材を差込可能とする差込部が設けられており、
前記差込部に差し込まれながら前記保持部に保持された前記差込部材は、前記ケースに対する前記モータハウジングの相対移動を規制する、回転工具。 A rotary tool for rotating the output shaft,
A motor, a motor housing that houses the motor, and a power transmission mechanism that transmits the driving force of the motor to the output shaft;
The case that houses the power transmission mechanism is provided with a holding portion that holds an insertion member that is inserted in a direction intersecting the axial direction of the output shaft,
The motor housing is provided with an insertion portion that allows the insertion member to be inserted,
The insertion member held by the holding portion while being inserted into the insertion portion restricts relative movement of the motor housing with respect to the case. - 請求項1に記載の回転工具において、
前記ケースは出力方向で分離される前部ケースと後部ケースとを有し、
前記保持部は前記後部ケースに設けられる、回転工具。 The rotary tool according to claim 1, wherein
The case has a front case and a rear case separated in the output direction;
The holding part is a rotary tool provided in the rear case. - 出力軸を回転動作させる回転工具であって、
モータと、該モータを収容するモータハウジングと、該モータの駆動力を前記出力軸に伝達する動力伝達機構とを有し、
前記動力伝達機構を内装するケースは、出力方向で分離される前部ケースと後部ケースとを有し、
前記前部ケースおよび前記後部ケースのいずれか一方には、前記出力軸の軸方向と交差する方向に差し込まれる差込部材を保持する保持部が設けられており、
前記前部ケースおよび前記後部ケースのいずれか他方には、前記差込部材を差込可能とする差込部が設けられており、
前記差込部に差し込まれながら前記保持部に保持された前記差込部材は、前記一方のケースに対する前記他方のケースの相対移動を規制する、回転工具。 A rotary tool for rotating the output shaft,
A motor, a motor housing that houses the motor, and a power transmission mechanism that transmits the driving force of the motor to the output shaft;
The case that houses the power transmission mechanism has a front case and a rear case that are separated in the output direction,
Either one of the front case and the rear case is provided with a holding portion that holds an insertion member that is inserted in a direction intersecting the axial direction of the output shaft,
The other part of the front case and the rear case is provided with an insertion portion that allows the insertion member to be inserted,
The insertion member held by the holding portion while being inserted into the insertion portion restricts relative movement of the other case with respect to the one case. - 請求項3に記載の回転工具において、
前記動力伝達機構は動力を伝達する動力伝達部材を有し、
前記後部ケースは前記動力伝達部材を支持する支持部を有する、回転工具。 The rotary tool according to claim 3,
The power transmission mechanism has a power transmission member for transmitting power,
The said rear case is a rotary tool which has a support part which supports the said power transmission member. - 請求項3または請求項4に記載の回転工具において、
前記動力伝達機構は減速機構を有し、
前記後部ケースには前記減速機構が内装される、回転工具。 The rotary tool according to claim 3 or 4,
The power transmission mechanism has a speed reduction mechanism,
A rotary tool in which the speed reduction mechanism is built in the rear case. - 請求項3から請求項5のいずれかに記載の回転工具において、
前記動力伝達機構は回転動作に打撃力を加える打撃機構を有し、
前記前部ケースには前記打撃機構が内装される、回転工具。 The rotary tool according to any one of claims 3 to 5,
The power transmission mechanism has a striking mechanism that applies a striking force to the rotation operation,
A rotary tool in which the striking mechanism is housed in the front case. - 請求項3から請求項6のいずれかに記載の回転工具において、
前記モータハウジングは、前記差込部材を介して前記保持部に共締めされる、回転工具。 The rotary tool according to any one of claims 3 to 6,
The motor housing is a rotary tool that is fastened to the holding portion via the insertion member. - 請求項1から請求項7のいずれかに記載の回転工具において、
前記保持部は、雌螺子で形成され、
前記差込部材は、該雌螺子と螺合可能な雄螺子である、回転工具。 The rotary tool according to any one of claims 1 to 7,
The holding portion is formed of a female screw,
The insertion member is a rotary tool that is a male screw that can be screwed into the female screw.
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FR3075680A1 (en) * | 2017-12-26 | 2019-06-28 | Etablissements Georges Renault | OPTIMIZED INVERSE SINGING DEVICE / CUTTING DEVICE |
TWI703017B (en) * | 2019-08-14 | 2020-09-01 | 車王電子股份有限公司 | Impact wrench |
CN112643595A (en) * | 2019-10-11 | 2021-04-13 | 英格索兰工业美国公司 | Impact wrench powered by battery |
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KR102224291B1 (en) * | 2019-02-21 | 2021-03-09 | 계양전기 주식회사 | Electric Power Tool that Enables Automatic Alignment of the Concentricity of the Gearbox |
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CN112643595A (en) * | 2019-10-11 | 2021-04-13 | 英格索兰工业美国公司 | Impact wrench powered by battery |
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