JP2018099742A - Portable processing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability of a handle part projecting further backward than the rear end of a base, by solving a problem of a portable processing machine assumed to be generally used in a standing position of a user, in that a portion, gripped by the user, of a handle part is disposed apart from a rotary cutter serving as a processing part and in a position projecting further backward from the rear end of the base and this type of portable processing machine is often handled relatively roughly, requiring a measure to prevent the handle part from striking, for example, the ground, resulting in damage to it.SOLUTION: A damper 43 is provided in a lower part of a handle part 40. The entire portion of the handle part 40 is located higher than a plane disposed in contact with the rear part of a base 3 and the lower part of the damper 43. By virtue of this, when the portable processor 1 is placed on, for example, the ground, the damper 43 first comes into contact with, for example, the ground, thus making it possible to reduce impact on the handle part 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a portable processing machine that performs cutting or grooving of a workpiece by rotating a rotary blade using an electric motor as a drive source.

  This type of portable processing machine is provided with a portable processing machine suitable for the processing work on the assumption that a user processes a workpiece in a standing posture or a middle-waist posture. Patent Document 1 below discloses a portable processing machine that is assumed to be used mainly for standing work. In the portable processing machine disclosed in Patent Document 1, the portion of the handle portion that the user grips is a position away from the rotary blade that is the processing portion, and a position that protrudes further rearward from the rear end of the base. Is arranged.

  Further, Patent Document 2 below discloses a battery-type portable processing machine provided with a hook for hanging on a support frame or the like as a base. In the portable processing machine disclosed in Patent Document 2, the hook is movable between the use position and the storage position. Patent Document 2 discloses a configuration in which the hook contacts the battery at the storage position.

JP 2003-89101 A JP2015-178154A

  This type of portable processing machine is often handled relatively rough. Therefore, in the structure of the handle portion as disclosed in Patent Document 1, it is necessary to be careful that the handle portion does not collide with the ground or the like and be damaged.

  An object of the present invention is to enhance the durability of a handle portion that is provided to protrude rearward from the rear end of a base.

  Said subject is solved by each following invention.

  1st invention is a portable processing machine provided with the tool main-body part provided with the rotary blade which uses an electric motor as a drive source, and the base which supports a tool main-body part on the upper surface side. In the first invention, the workpiece can be processed by the rotary blade protruding from the lower surface side of the base. In the first invention, the tool main body includes a handle that is gripped by a user, and the grip of the handle is disposed behind the rear end of the base. In the first invention, a shock absorbing damper is provided at the lower portion of the handle portion.

  According to the first aspect, when the user places the portable processing machine on the ground or the like, the handle portion extending rearward from the rear end of the base can be protected from collision by the damper.

  A second invention is the portable processing machine according to the first invention, wherein the damper has an annular shape in which a through hole is opened in the horizontal direction.

  According to the second invention, since the shape of the damper is easily deformed when it collides with the ground or the like, the damper has a high buffering effect.

  A third invention is the portable processing machine according to the second invention, wherein the damper has a chevron shape with the connecting portion with the handle portion as a hem side.

  According to the third invention, the strength of the connecting portion between the damper and the handle portion can be increased. As a result, in the third aspect of the invention, it is possible to make the portion that is damaged with respect to the entire damper as small as possible (for example, only the vicinity of the collision portion is damaged).

  A fourth invention is a portable processing machine according to any one of the first to third inventions, wherein the damper is formed integrally with the handle portion.

  According to the fourth aspect of the invention, the number of parts can be reduced, thereby reducing the cost of the portable processing machine. According to the fourth invention, the strength of the connecting portion between the damper and the handle portion can be increased.

  5th invention is a battery-type portable processing machine provided with the tool main-body part provided with the rotary blade which uses an electric motor as a drive source, and the base which supports a tool main-body part on the upper surface side. In the fifth aspect of the invention, the workpiece can be processed with the rotary blade protruding from the lower surface side of the base. In a fifth aspect of the invention, the tool body is provided with a handle that is gripped by a user, and the grip of the handle is disposed behind the rear end of the base. In the fifth invention, the battery can be attached to and detached from the tool body. In the fifth invention, the tool body is provided with a hanging hook, and the hook is movable between a use position and a storage position. Furthermore, in the fifth invention, the hook at the storage position is arranged so as to protect the battery.

  According to the fifth invention, the hook has not only a hanging function but also a function of protecting the battery attached to the portable processing machine from collision with the ground or the like. In the portable processing machine as disclosed in Patent Document 2, when the cutting depth is shallow, particularly the rear portion of the tool main body portion is positioned relatively upward from the base. Thereby, in the portable processing machine as disclosed in Patent Document 2, the hook provided on the base and the battery attached to the rear portion of the tool main body are separated from each other. For this reason, the hook does not function as a battery guard. In this respect, in the fifth aspect, since the tool body is provided with the hook, the hook can function as a battery guard regardless of the adjustment of the cutting depth.

  In a sixth aspect based on the fifth aspect, the hook in the storage position is a portable processing machine disposed outside the operation portion of the battery.

  According to the sixth aspect, since the hook is located outside the battery operation unit, it is possible to prevent a collision between the battery operation unit and the ground or the like. As a result, in the sixth aspect of the invention, it is possible to prevent the operating portion of the battery from being damaged and failing.

  A seventh invention is the portable processing machine according to the fifth invention, wherein the hook is supported by a hook mounting portion provided in the motor housing of the electric motor. In the seventh invention, the motor housing, the hook mounting portion, and the fixed cover coupled to the motor housing and covering the rotary blade are each made of metal parts, and the hook is rigidly supported by the fixed cover; It has become.

  According to the seventh invention, the motor housing, the hook mounting portion, and the fixed cover have high strength. Thereby, in 7th invention, the support strength of a hook can be raised.

1 is an overall left side view of a portable processing machine according to an embodiment of the present invention. It is the top view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (II) direction in FIG. In this figure, the inside of the electric motor and the support part of the handle part are shown broken away. It is the right view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (III) direction in FIG. This figure shows a state in which the hook is in the storage position. It is a right view of the portable processing machine which concerns on embodiment of this invention. This figure shows a state in which the right half of the handle portion has been removed and a state in which two batteries have been removed. It is the rear view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (V) direction in FIG. It is the bottom view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (VI) direction in FIG. It is a right view of the portable processing machine which concerns on embodiment of this invention. This figure shows a state where the hook is positioned at the first use position. It is the rear view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (VIII) direction in FIG. It is the bottom view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (IX) direction in FIG. It is a right view of the portable processing machine which concerns on embodiment of this invention. This figure shows a state where the hook is located at the second use position. It is the rear view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (XI) direction in FIG. It is the bottom view which looked at the portable processing machine which concerns on embodiment of this invention from the arrow (XII) direction in FIG. It is a side view of the hook of another form provided with the engaging part. In this figure, only the tip of the hook portion is shown enlarged.

  Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, in the present embodiment, the portable processing machine 1 in which the handle portion 40 is disposed at a position that protrudes further rearward from the rear end of the base 3 on the assumption that the user mainly uses it for standing work. Is illustrated. This portable processing machine 1 includes a rotary blade 2 having a circular saw blade that rotates using an electric motor 20 as a drive source, a tool main body portion 10 provided with the rotary blade 2, and a base that supports the tool main body portion 10 on the upper surface side. 3 is provided. As shown in FIGS. 6, 9, and 12, the base 3 is provided with a generally rectangular window 3 a that is open in the vertical direction. The lower side of the rotary blade 2 protrudes from the lower surface side of the base 3 through the window 3a. The workpiece W is cut by cutting the rotary blade 2 protruding to the lower surface side of the base 3.

  A handle 40 that is gripped by the user is provided at the rear of the tool body 10. The user can proceed with the cutting process by holding the handle 40 at the right side of the portable processing machine 1 in FIG. 1 and moving the portable processing machine 1 to the left side in FIG. In the following description, regarding the front and rear, left and right directions of the members and the configuration, the direction in which cutting proceeds is the front side, and the user side is the rear side. Moreover, about the left-right direction of a member and a structure, it uses on the basis of a user.

  The tool main body 10 includes a metal fixed cover 11 that covers a substantially half-circumferential range on the upper side of the rotary blade 2. The tool body 10 is supported on the upper surface of the base 3 so as to be swingable up and down via a vertically swinging support shaft 12 provided at the front portion of the fixed cover 11. The amount of protrusion of the rotary blade 2 to the lower surface side of the base 3 can be changed by swinging the tool body portion 10 left and right about the vertical swing support shaft 12. The depth of cut for the workpiece W can be adjusted.

  The tool main body 10 is coupled to the front inclined support 4 provided on the upper surface of the base 3 via the vertical swing support shaft 12. As shown in FIG. 2, the front inclined portion 4 can be tilted to the left and right via an angular plate 4 a fixed in an upright state on the upper surface of the base 3, and a front left and right inclined support shaft 5 on the rear surface side of the angular plate 4 a. And an inclined bracket 4b supported. The above-described vertical swing support shaft 12 is supported on the inclined bracket 4b. The tilting position of the tilt bracket 4b with respect to the angular plate 4a is fixed by tightening the fixing lever 4c.

  A rear inclined support portion 6 is provided between the rear portion of the fixed cover 11 and the upper surface of the base 3. As shown in FIG. 1, the rear inclined support portion 6 includes a base bracket 6 a that is supported to be tiltable left and right with respect to the base 3 via a rear left and right inclined support shaft 7, and a forward and backward rotation with respect to the base bracket 6 a. And a depth guide 6b supported so as to be able to swing back and forth via a moving shaft 6c. The rear left / right inclined support shaft 7 is arranged coaxially with the front left / right inclined support shaft 5. By inclining the tool body 10 left and right via the front left and right inclined support shafts 5 and the rear left and right inclined support shafts 7, the cutting angle of the rotary blade 2 with respect to the workpiece W can be adjusted.

  The depth guide 6 b is an arcuate guide member that guides the vertical swing operation of the tool body 10 around the vertical swing support shaft 12, and the fixing screw 8 is fastened to the handle support portion 13. Thereby, the vertical rocking | fluctuation position with respect to the base 3 of the tool main-body part 10 can be fixed, and, thereby, the cutting depth of the rotary blade 2 can be fixed. A depth scale 6d indicating the cutting depth of the rotary blade 2 is displayed on the edge of the depth guide 6b. The fixing screw 8 can be tightened or loosened by swinging the lever 9 up and down. As shown in FIG. 1, a white arrow 11 a indicating the rotation direction of the rotary blade 2 is displayed on the front surface of the fixed cover 11.

  The lower half of the rotary blade 2 is covered with a movable cover 14. The movable cover 14 is supported so as to be openable and closable around the vicinity of the rotation center of the rotary blade 2. When the movable cover 14 is opened, the periphery (blade edge) of the rotary blade 2 is exposed. The movable cover 14 is spring-biased in the closing direction. When the movable cover is closed by the spring biasing force, the lower half of the rotating blade 2 is covered with the movable cover 14. An opening / closing lever 14 a is provided at the rear of the movable cover 14. The user can grasp the opening / closing lever 14a to forcibly open and close the movable cover 14 by manual operation. In a normal processing operation, as shown in FIG. 1, the front end of the movable cover 14 is brought into contact with the end portion of the workpiece W, and the portable processing machine 1 is moved to the front side in the contact state. The movable cover 14 is gradually opened against the spring biasing force.

  An electric motor 20 is attached to the back side of the fixed cover 11 via a reduction gear unit 15. The electric motor 20 is attached in a lateral orientation in which the motor axis is orthogonal to the surface direction of the rotary blade 2. The reduction gear unit 15 has a configuration in which a reduction gear train is accommodated in a gear housing 15 a provided integrally with the back surface of the fixed cover 11. The fixed cover 11 and the gear housing 15a are integrally formed of a metal material (magnesium die cast) as a material. A metal (aluminum die cast) motor housing 21 is coupled to the gear housing 15a.

  As shown in FIG. 2, the electric motor 20 uses a brushless motor in which a rotor 23 is rotatably supported on the inner peripheral side of a cylindrical stator 22. The electric motor 20 is made compact in the axial direction (left-right direction), for example, so that the rotor 23 does not require the arrangement of the commutator and the brush. The motor shaft 24 that supports the rotor 23 is rotatably supported around the axis via bearings 25 and 26 in the axial direction. The front bearing 25 is held by the gear housing 15 a, and the rear bearing 26 is held by the rear surface of the motor housing 21. A cooling fan 27 is attached to the motor shaft 24 between the front bearing 25 and the rotor 23.

  When the cooling fan 27 is rotated by starting the electric motor 20, outside air is introduced into the motor housing 21 through a plurality of intake holes 21 a provided on the right side surface of the motor housing 21, as shown in FIG. 3. As indicated by the white arrow in FIG. 2, the outside air introduced from the intake hole 21a flows to the motor axial direction output side (lower side in FIG. 2) as indicated by the black arrow in FIG. The child 22 and the rotor 23 are cooled.

  A driving gear portion 24 a is provided at the left end portion of the motor shaft 24. The driven gear 16 is meshed with the drive gear portion 24a. The meshing of the driving gear portion 24a on the driving side and the driven gear 16 on the driven side constitutes a reduction gear train for reducing the rotational output of the electric motor 20. The driven gear 16 is integrally coupled to the spindle 17. The spindle 17 is rotatably supported by the gear housing 15a. The spindle 17 is arranged in parallel to the motor shaft 24.

  The tip end side of the spindle 17 protrudes into the fixed cover 11, and the rotary blade 2 is attached to the protruding portion. The rotary blade 2 is sandwiched between the outer flange 2a and the inner flange (not visible in the figure) in the perpendicular direction. When the sandwiched state is locked by a fixing bolt 2c fastened to the tip surface of the spindle 17, the rotary blade 2 is fixed to the spindle 17 so that it cannot be displaced in the axial direction and cannot rotate about the axis.

  As shown in FIG. 3, a battery attachment portion 30 is provided on the back side of the fixed cover 11 and behind the electric motor 20. The battery mounting portion 30 has a generally flat plate shape, and two battery packs 31 can be mounted side by side in the front-rear direction on the lower surface side thereof. As the battery pack 31, a highly versatile 18V output lithium ion battery that can be attached as a power source to other electric tools such as a screw tightener can be used. The battery pack 31 can be repeatedly used as a power source by being removed from the battery mounting portion 30 and charged with a separately prepared charger. The two battery packs 31 are electrically connected in series, and can supply a total of 36 V of power to the electric motor 20.

  The battery pack 31 is provided with an operation portion 31a spring-biased on the lock side (upper side in FIG. 3). By pushing the operation portion 31a to the unlock side (lower side in FIG. 3), the attachment claw provided on the upper surface of the battery pack 31 is retracted downward. In a state where the attachment claw is retracted to the unlock side, the battery pack 31 can be removed from the battery attachment portion 30. The battery pack 31 can be removed from the battery mounting portion 30 by sliding it toward the front side (right side as viewed from the user) in FIG. When the pushing operation of the operation portion 31a is stopped, the operation portion 31a returns to the original state by the spring biasing force, and the attachment claw protrudes to the upper surface side of the battery pack 31 (lock position). The battery pack 31 is attached to the battery attachment portion 30 by sliding leftward as viewed from the user. By this sliding operation, the claw is automatically engaged with the battery attachment portion 30, and the battery pack 31 is fixed so as not to be detached from the battery attachment portion 30.

  As shown in FIG. 2, a controller 32 including a control circuit for controlling the operation of the electric motor 20 and a power supply circuit is accommodated in the battery mounting portion 30. A sensor board 28 provided with a magnetic sensor for detecting the rotational position of the rotor 23 is attached to the stator 22 on the side of the intake hole 21a in the motor axial direction. The controller 32 receives a current of the electric motor 20 based on a control circuit composed of a microcomputer that transmits a control signal based on the position information of the rotor 23 detected by the sensor substrate 28 and a control signal received from the control circuit. A drive circuit composed of FETs to be switched and an auto-stop circuit that cuts off the power supply to the electric motor 20 are mounted so as not to be overdischarged or overcurrent according to the detection result of the state of the battery pack 31.

  As shown by the black arrows in FIGS. 2 and 4, motor cooling air is introduced into the battery mounting portion 30. As shown in FIG. 4, a partition wall 30 a that extends downward from the front end of the controller 32 is provided inside the battery mounting portion 30. By this partition wall portion 30a, the inside of the battery mounting portion 30 is partitioned forward and backward. Of the interior of the battery mounting portion 30, electrical wiring mainly related to the controller 32 is collectively stored in the wiring portion 30b in front of the partition wall 30a. Of the interior of the battery mounting portion 30, the ventilation portion 30c on the rear side of the partition wall 30a is a ventilation path where no wiring or other components are arranged. The interior of the motor housing 21 and the ventilation portion 30c are communicated with each other via a vent hole that is not visible in the drawing. The motor cooling air in the motor housing 21 flows to the ventilation portion 30c as it is through this ventilation hole. The motor cooling air introduced into the ventilation portion 30 c is exhausted to the outside through a plurality of exhaust holes 33 provided on the left side surface of the tool main body portion 10 while mainly cooling the lower surface of the controller 32. As described above, the space from the air vent of the motor housing 21 to the front portion of the controller 32 is divided into the wiring portion 30b for wiring and the ventilation portion 30c for ventilation by the partition wall 30a. The flow of the air (motor cooling air) discharged from the mouth flows smoothly toward the controller 32 without being obstructed by the wiring or the like, thereby improving the cooling efficiency of the controller 32.

  A loop-shaped handle portion 40 is provided at the rear portion of the battery attachment portion 30. The handle portion 40 extends substantially in parallel along the surface direction of the rotary blade 2. The handle portion 40 is provided so as to protrude rearward from the rear portion of the battery attachment portion 30 and to protrude further rearward than the rear end edge of the base 3. A rear portion of the handle portion 40 that extends vertically is a grip portion 41 held by the user. The surface of the grip portion 41 is covered with an elastomer resin layer 40a for preventing slipping. A trigger-type switch lever 42 is provided on the upper portion of the grip portion 41. When the switch lever 42 is pulled by the fingertip of the hand holding the grip portion 41, the electric motor 20 is activated and the rotary blade 2 rotates.

  A front handle 44 is provided above the electric motor 20. As shown in FIG. 4, the front handle 44 has a gate shape straddling between the upper portion of the electric motor 20 and the back surface of the fixed cover 11. A portion of the upper portion of the front handle 44 that extends substantially in the left-right direction is a front grip portion 44a. The user can move the portable processing machine 1 by holding the front grip portion 44a with one hand and the grip portion 41 of the handle portion 40 with the other hand.

  A shock absorbing damper 43 is provided below the handle portion 40. As shown in FIG. 1, the damper 43 has an annular shape in which a through hole 43 b is opened horizontally in the left-right direction (in the direction orthogonal to the paper surface). Further, the damper 43 has a mountain shape with the connecting portion 43a with the handle portion 40 as a hem side. The damper 43 is connected to the handle portion 40 by two connecting portions 43 a and is formed integrally with the handle portion 40. With the above configuration, the entire portion of the handle portion 40 is located above the plane that is in contact with the rear portion of the base 3 and the lower portion of the damper 43. Thereby, when the portable processing machine 1 of the present embodiment is placed on the ground or the like, the entire portion of the handle portion 40 is positioned above the base 3 and the damper 43, and the lower portion of the handle portion 40 is placed on the ground first. So that it does not collide with Further, as shown in FIG. 4, the dampers 43 are provided on both the left and right sides of the half structure of the handle portion 40.

  The tool body 10 is provided with a hanging hook 50 via a hook mounting portion 51. As shown in FIG. 3, the hook 50 has a so-called U-shape. The hook 50 is supported by the hook attachment portion 51 and extends forward, an arm portion 50b that is substantially orthogonal to the support portion 50a, and a substantially orthogonal portion to the arm portion 50b. And a hook portion 50c extending rearward. The support part 50a, the arm part 50b, and the hook part 50c are formed by bending a single bar, and are formed integrally with each other. As shown in FIGS. 5 and 6, the arm portion 50 b has a shape that swells outward (right side in FIG. 5) from the support portion 50 a and the hook portion 50 c in the storage position described later. As shown in FIG. 9, the hook portion 50c is provided with anti-slip projections 50f at two locations on the side facing the support portion 50a.

  The support portion 50a is supported by the hook attachment portion 51 so as to be rotatable around its axis. When the contact portion between the support portion 50a and the hook attachment portion 51 is viewed in a cross section perpendicular to the axis of the support portion 50a, it is generally circular, but is partially provided with unevenness. Thereby, the hook 50 is provided so that it may be hold | maintained at three positions, a storage position, a 1st use position, and a 2nd use position. As shown in FIG. 3, the front portion of the support portion 50 a is inserted through the support hole 51 a of the hook attachment portion 51. An engagement pin 50d is attached to the tip of the support portion 50a protruding from the support hole 51a. The engagement pin 50d protrudes in the radial direction of the support portion 50a. On the other hand, three V-shaped engagement recesses 51 b are provided on the front end surface of the hook attachment portion 51. The three engaging recesses 51b are arranged at intervals of 90 ° around the support hole 50a. When the engagement pin 50d is fitted into any of the three engagement recesses 51b, the support portion 50a is held at three positions around the axis thereof, so that the hook 50 is in the storage position, the first use position described above. Alternatively, the position is held at one of the second use positions.

  As shown in FIGS. 3 and 5 to 12, when the hook 50 is in the storage position, the hook portion 50 c is located almost directly below the support portion 50 a. When the hook 50 is in the first use position, the hook portion 50c is located on the substantially horizontal right side of the support portion 50a when viewed from the rear. When the hook 50 is in the second use position, the hooking portion 50c is located almost directly above the support portion 50a. As described above, the hook 50 rotates approximately 90 ° around the axis of the support portion 50a during the transition from the storage position to the first use position (rotates counterclockwise when viewed from the rear). Further, the hook 50 rotates approximately 90 ° around the axis of the support portion 50a during the transition from the first use position to the second use position (rotates counterclockwise when viewed from the rear).

  As shown in FIGS. 3, 5, and 6, the hook 50 in the storage position is located outside the battery pack 31 attached to the battery attachment portion 30 and is arranged to protect the battery pack 31. ing. Specifically, the support portion 50 a is disposed close to the upper portion of the operation portion 31 a of the front battery pack 31. The arm portion 50b is positioned approximately in the middle of the two battery packs 31 when viewed in the front-rear direction, and is disposed at a position covering the right side of the battery pack 31 when viewed in the left-right direction. The hook 50c is disposed below the front battery pack 31.

  The fixed cover 11, the motor housing 21, and the hook attachment portion 51 are each made of metal as a material. In the present embodiment, the fixed cover 11 is made of magnesium die cast, the motor housing 21 is made of aluminum die cast, and the hook mounting portion 51 is made of iron (sintered). A metal motor housing 21 is also coupled to the right side of the metal fixed cover 11, and a hook 50 is supported via a metal hook mounting portion 51 attached to the metal motor housing 21. The hook attaching portion 51 is sandwiched between the front handle 44 and the motor housing 21 and is fixed by screws. As described above, the hook 50 is supported by the same metal hook mounting portion 51 rigidly coupled to the metal fixing cover 11 and the motor housing 21, and is supported with high strength. As a result, the hook 50 has high durability against external forces such as bending.

  According to the portable processing machine 1 of the present embodiment configured as described above, the damper 43 is provided at the lower portion of the handle portion 40 arranged at a position that protrudes further rearward from the rear end of the base 3. By providing the damper 43, the entire handle portion 40 is positioned above the base 3 and the damper 43. Accordingly, the damper 43 can prevent the handle portion 40 from directly colliding with the ground or the like when the user places the portable processing machine 1 on the ground or the like, and can reduce the impact on the handle portion 40. it can. In addition, the shape of the damper 43 is an annular shape in which a through hole 43b is opened horizontally in the left-right direction. For this reason, when it collides with the ground etc., the shape of the damper 43 tends to deform | transform, and the damper 43 has a high buffering effect. Further, the damper 43 has a mountain shape with the connecting portion 43a with the handle portion 40 as a hem side. Thereby, the intensity | strength of the connection part 43a can be raised and the damage of the damper 43 can be suppressed to the small range near a collision part. In addition, the damper 43 and the handle portion 40 are integrally formed. As a result, the number of parts can be reduced and the cost can be reduced, and the strength of the connecting portion 43a can be further increased.

  Moreover, according to the portable processing machine 1 of this embodiment, the hook 50 functions as a suspension member mainly in the first use position. Furthermore, the hook 50 functions as a guard that protects the battery pack 31 attached to the battery attachment portion 30 from collision with the ground or the like in the storage position. In addition, both the hook 50 and the battery attachment portion 30 are provided in the tool main body portion 10. Accordingly, the hook 50 functions as a guard for the battery pack 31 even when the tool body 10 is tilted up and down or left and right by adjusting the cutting depth and the cutting angle. In addition, the support portion 50a mainly of the hook 50 is located outside the operation portion 31a of the battery pack 31 in the storage position, and functions as a guard that protects the battery pack 31 from collision with the ground or the like. Thereby, especially the damage of the operation part 31a of the battery pack 31 can be prevented. Furthermore, the hook attachment portion 51 is rigidly coupled to the motor housing 21 and has high strength because it is made of metal. Thereby, the support strength of the hook 50 can be increased.

  Various modifications can be made to the embodiment described above. For example, the mountain-shaped damper 43 having a hole horizontally opened in the left-right direction is illustrated. However, when the user places the damper 43 on the ground or the like, the shape collides with the ground or the like before the handle portion 40 to provide a buffering effect. If it is, the shape of a damper can be changed suitably. For example, the damper may be changed to a semicircular arc shape, a semi-oval shape, or an annular shape with inner sides penetrating left and right, instead of the chevron shape. Alternatively, the connecting portion of the rear damper may be provided on the rear side of the handle portion, and the shape of the damper may be changed to a so-called crescent shape in which the inner peripheral side penetrates left and right.

  The rechargeable portable processing machine 1 is illustrated in which two battery packs 31 are mounted side by side behind the motor housing 21, but the workability (use feeling) of the user is impaired with respect to the mounting position and the number of battery packs. However, as long as the hook functioning as a guard for the battery pack can be provided, it can be changed as appropriate. Moreover, although the structure which has arrange | positioned the electric motor 20 in the horizontal attitude | position was illustrated, it is good also as a structure arrange | positioned in the vertical attitude. Furthermore, the structure which provides the illustrated damper and hook is applicable also to the portable processing machine which uses a commercial 100V alternating current power supply as a power supply. In addition, although the portable processing machine 1 using the rotary blade 2 having a circular saw blade is illustrated, a diamond wheel may be used as the rotary blade.

  An engaging portion can be provided in the hook portion 50c of the hook 50 exemplified above. An example of the engaging portion is shown in FIG. An engaging portion 52 is supported at the tip of the hooking portion 50c via a support shaft 53 so as to be rotatable up and down. The engaging portion 52 can be moved to a housing position whose longitudinal direction is along the axial direction of the hooking portion 50c and a take-out position indicated by a two-dot chain line in FIG. By pulling out the engaging portion 52 to the take-out position, it is possible to more reliably maintain the hooked state of the hook portion 50c with respect to the hook target portion (such as the edge of the work table).

W ... Work material 1 ... Portable processing machine 2 ... Rotating blade 2a ... Outer flange 2c ... Fixing bolt 3 ... Base 3a ... Window part 4 ... Front side inclined support part 4a ... Angular plate 4b ... Inclined bracket 4c ... fixed lever 5 ... front left and right inclined support shaft 6 ... rear inclined support portion 6a ... base bracket, 6b ... depth guide, 6c ... front and rear pivot shaft, 6d ... depth scale 7 ... rear left and right inclined support shaft 8 ... fixed Screw 9 ... Lever 10 ... Tool body 11 ... Fixed cover, 11a ... White arrow (indicating the direction of rotation of the rotary blade)
DESCRIPTION OF SYMBOLS 12 ... Vertical swing support shaft 13 ... Handle support part 14 ... Movable cover, 14a ... Opening / closing lever 15 ... Reduction gear part, 15a ... Gear housing 16 ... Driven gear 17 ... Spindle 20 ... Electric motor 21 ... Motor housing, 21a ... Intake Hole 22 ... Stator 23 ... Rotor 24 ... Motor shaft 24a ... Drive gear 25, 26 ... Bearing 27 ... Cooling fan 28 ... Sensor substrate 30 ... Battery mounting part 30a ... Partition, 30b ... Wiring part, 30c ... Ventilation part DESCRIPTION OF SYMBOLS 31 ... Battery pack (18V lithium ion battery), 31a ... Operation part 32 ... Controller 33 ... Exhaust hole 40 ... Handle part (main handle), 40a ... Elastomer resin layer 41 ... Grip part 42 ... Switch lever 43 ... Damper, 43a ... Connecting part, 43b ... through hole 44 ... front handle, 44a ... front grip part 50 Hook 50a ... support portion, 50b ... arm portion, 50c ... hook portion, 50d ... engagement pin, 50f ... projection portion 51 ... hook attachment portion, 51a ... support hole, 51b ... engagement recess 52 ... engagement portion 53 ... Spindle

Claims (7)

A tool main body provided with a rotary blade using an electric motor as a drive source, and a base that supports the tool main body on the upper surface side, and the rotary blade protruded from the lower surface side of the base is rotated to be processed. Portable processing machine for processing materials,
The tool body includes a handle that is gripped by a user,
The grip portion of the handle portion is disposed behind the rear end of the base,
A portable processing machine provided with a shock absorbing damper at a lower portion of the handle portion. The portable processing machine according to claim 1,
The damper is a portable processing machine in which the shape of the damper is an annular shape having a horizontal through hole. The portable processing machine according to claim 2,
The damper is a portable processing machine having a mountain shape with a connecting portion with the handle portion as a hem side. It is a portable processing machine given in any 1 paragraph of Claims 1-3,
The damper is a portable processing machine formed integrally with the handle portion. A tool main body provided with a rotary blade using an electric motor as a drive source, and a base that supports the tool main body on the upper surface side, and the rotary blade protruded from the lower surface side of the base is rotated to be processed. A battery-powered portable processing machine for processing materials,
The tool body includes a handle that is gripped by a user,
The grip portion of the handle portion is disposed behind the rear end of the base,
The battery is detachable from the tool body,
The tool body includes a hook for hanging,
The hook is movable between a use position and a storage position;
The portable processing machine is arranged such that the hook in the storage position can protect the battery. The portable processing machine according to claim 5,
The hook in the storage position is a portable processing machine arranged outside the operation part of the battery. The portable processing machine according to claim 5 or 6,
The hook is supported by a hook mounting portion provided in a motor housing of the electric motor,
The motor housing, the hook mounting portion, and the fixed cover that is coupled to the motor housing and covers the rotary blade are metal parts, and the hook is rigidly supported by the fixed cover. Portable processing machine.

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