JP2023000391A - Electric tool - Google Patents

Abstract

To provide a technology of preventing poor appearance of an electric tool in order to solve a problem in a housing of an electric tool which is manufactured often by injection molding and in which when sink is generated, poor appearance of the electric tool may occur.SOLUTION: An electric tool includes a motor, an output unit that is driven by the motor, a housing made of a synthetic resin and including a motor accommodation part that accommodates the motor; a recess provided in a label area defined in a part of an outer surface of the housing; and a label attached to the label area. By providing the recess in the outer surface of the housing, mold shrinkage of the housing is improved, and sink generation is suppressed. The label is attached to the label area so as to hide the recess. As a result, poor appearance of the electric tool is prevented.SELECTED DRAWING: Figure 2

Description

The technology disclosed in this specification relates to power tools.

Products made of synthetic resin are often manufactured by injection molding. In injection molding, heat-melted synthetic resin is injected into a mold. Due to molding shrinkage, the surface of the product may be dented or distorted. Such a phenomenon is called sink marks. Patent Literature 1 discloses an example of technology for suppressing the occurrence of sink marks.

JP-A-8-72588

Power tool housings are often manufactured by injection molding. If sink marks occur on the housing, there is a possibility that the appearance of the power tool will be poor.

An object of the technique disclosed in this specification is to suppress appearance defects of a power tool.

This specification discloses a power tool. The power tool may include a motor, an output section driven by the motor, and a synthetic resin housing including a motor housing section for housing the motor. The power tool may comprise a recess provided in a label area defined in part of the outer surface of the housing. The power tool may have a label applied to the label area.

According to the technique disclosed in this specification, the appearance defect of the power tool is suppressed.

FIG. 1 is a perspective view showing the power tool according to the first embodiment. FIG. 2 is a side view showing the power tool according to the first embodiment. FIG. 3 is a front view showing the upper portion of the power tool according to the first embodiment. FIG. 4 is a plan view showing the upper portion of the power tool according to the first embodiment. FIG. 5 is a longitudinal sectional view showing the power tool according to the first embodiment. FIG. 6 is a longitudinal sectional view showing the upper portion of the power tool according to the first embodiment. FIG. 7 is a cross-sectional view showing the upper portion of the power tool according to the first embodiment. FIG. 8 is a partially exploded perspective view of the power tool according to the first embodiment. 9 is a perspective view showing part of the outer surface of the right housing according to the first embodiment. FIG. 10 is a perspective view showing part of the inner surface of the right housing according to the first embodiment; FIG. FIG. 11 is a cross-sectional view showing part of the right housing according to the first embodiment. 12 is a perspective view showing a recess according to the first embodiment; FIG. 13 is a perspective view showing a recess according to a modification of the first embodiment; FIG. 14 is a perspective view showing a recess according to a modification of the first embodiment; FIG. 15 is a perspective view showing a recess according to a modification of the first embodiment; FIG. FIG. 16 is a cross-sectional view schematically showing part of the right housing according to a modification of the first embodiment; FIG. 17 is a perspective view showing the power tool according to the second embodiment. FIG. 18 is a longitudinal sectional view showing the power tool according to the second embodiment. FIG. 19 is a cross-sectional view showing the power tool according to the second embodiment. FIG. 20 is a perspective view showing label areas and labels according to the second embodiment. FIG. 21 is a perspective view showing the vicinity of the label area according to the second embodiment. FIG. 22 is a perspective view showing the power tool according to the third embodiment. FIG. 23 is a longitudinal sectional view showing the power tool according to the third embodiment. FIG. 24 is a cross-sectional view showing the power tool according to the third embodiment. FIG. 25 is a perspective view showing label areas and labels according to the third embodiment. FIG. 26 is a perspective view showing the vicinity of the label area according to the third embodiment. FIG. 27 is a perspective view showing the power tool according to the fourth embodiment. FIG. 28 is a longitudinal sectional view showing the power tool according to the fourth embodiment. FIG. 29 is a cross-sectional view showing the power tool according to the fourth embodiment. FIG. 30 is a perspective view showing label areas and labels according to the fourth embodiment. FIG. 31 is a perspective view showing the vicinity of the label area according to the fourth embodiment. FIG. 32 is a perspective view showing the power tool according to the fifth embodiment. FIG. 33 is a cross-sectional view showing the power tool according to the fifth embodiment. FIG. 34 is a perspective view showing label areas and labels according to the fifth embodiment. FIG. 35 is a perspective view showing the vicinity of the label area according to the fifth embodiment. FIG. 36 is a perspective view showing the power tool according to the sixth embodiment. FIG. 37 is a cross-sectional view showing the power tool according to the sixth embodiment. FIG. 38 is a perspective view showing label areas and labels according to the sixth embodiment. FIG. 39 is a perspective view showing the vicinity of the label area according to the sixth embodiment. FIG. 40 is a perspective view showing the power tool according to the seventh embodiment. FIG. 41 is a cross-sectional view showing the power tool according to the seventh embodiment. FIG. 42 is a perspective view showing label areas and labels according to the seventh embodiment. FIG. 43 is a perspective view showing the vicinity of the label area according to the seventh embodiment. FIG. 44 is a perspective view showing the power tool according to the eighth embodiment. FIG. 45 is a longitudinal sectional view showing the power tool according to the eighth embodiment. FIG. 46 is a cross-sectional view showing the power tool according to the eighth embodiment. FIG. 47 is a perspective view showing label areas and labels according to the eighth embodiment. FIG. 48 is a perspective view showing the vicinity of the label area according to the eighth embodiment.

In one or more embodiments, a power tool may include a motor, an output driven by the motor, and a synthetic resin housing including a motor housing for housing the motor. The power tool may comprise a recess provided in a label area defined in part of the outer surface of the housing. The power tool may have a label applied to the label area.

In the above configuration, since the concave portion is provided on the outer surface of the housing, molding shrinkage of the housing is improved and the occurrence of sink marks is suppressed. Since the concave portion is provided in the label area, the occurrence of sink marks in the label area is suppressed. Since the label is affixed to the label area in which the occurrence of sink marks is suppressed, the distortion of the label is suppressed. Therefore, poor appearance of the label is suppressed, and the operator can correctly read the data printed on the label. Also, the label is affixed to the label area so as to hide the recess. Therefore, poor appearance of the power tool is suppressed.

In one or more embodiments, the recesses may be spaced apart in the label area.

The above configuration effectively suppresses the occurrence of sink marks. In addition, since the size of the opening of each recess can be reduced, when a label is pasted on the label area, the label is prevented from falling inside the recess. The label is applied to the label area with reduced distortion.

In one or more embodiments, the housing may include a thinned portion and a thickened portion having a thickness greater than the thickness of the thinned portion. The label area may be defined to include the outer surface of the thinner portion and the outer surface of the thicker portion.

With the above arrangement, the label area can be defined on any area of the outer surface of the housing.

In one or more embodiments, the recess may be provided in the outer surface of the thickened portion.

The above configuration effectively suppresses the occurrence of sink marks.

In one or more embodiments, a recess may be formed in each of the outer surface of the thin portion and the outer surface of the thick portion. The number of recesses formed in the outer surface of the thick portion may be greater than the number of recesses formed in the outer surface of the thin portion.

In the above configuration, since the number of recesses formed on the outer surface of the thick-walled portion is greater than the number of recesses formed on the outer surface of the thin-walled portion, the molding shrinkage of the housing is effectively improved, and the occurrence of sink marks is suppressed. be done.

In one or more embodiments, a recess may be formed in each of the outer surface of the thin portion and the outer surface of the thick portion. The depth of the recess formed in the outer surface of the thick portion may be deeper than the depth of the recess formed in the outer surface of the thin portion.

In the above configuration, since the depth of the recess formed in the outer surface of the thick portion is deeper than the depth of the recess formed in the outer surface of the thin portion, molding shrinkage of the housing is effectively improved, and sink marks are prevented. Suppressed.

In one or more embodiments, a recess may be formed in each of the outer surface of the thin portion and the outer surface of the thick portion. The area of the opening of the recess formed on the outer surface of the thick portion may be larger than the area of the opening of the recess formed on the outer surface of the thin portion.

In the above configuration, since the area of the opening of the recess formed on the outer surface of the thick portion is larger than the area of the opening of the recess formed on the outer surface of the thin portion, molding shrinkage of the housing is effectively improved, and sink marks are formed. is suppressed.

In one or more embodiments, the housing may have protrusions that protrude from the inner surface of the housing. The protrusion may include a first portion and a second portion protruding from the first portion. The thinned portion may include the first portion. The thickened portion may include a second portion.

With the above configuration, the occurrence of sink marks is effectively suppressed when the convex portion itself has a plurality of portions with different thicknesses.

In one or more embodiments, the housing may have protrusions that protrude from the inner surface of the housing. The thick portion may include protrusions.

With the above configuration, the occurrence of sink marks is effectively suppressed when the housing has a plurality of portions with different thicknesses.

In one or more embodiments, the protrusion may be provided to extend in the first direction. A plurality of recesses may be provided at intervals in the first direction.

In the above configuration, when the convex portion is provided so as to extend in the first direction, the occurrence of sink marks is effectively suppressed by providing a plurality of concave portions at intervals in the first direction.

In one or more embodiments, a plurality of protrusions may be provided in a second direction orthogonal to the first direction. A plurality of recesses may be provided at intervals in the second direction.

In the above configuration, when a plurality of protrusions are provided in the second direction, the occurrence of sink marks is effectively suppressed by providing a plurality of recesses at intervals in the second direction.

In one or more embodiments, the protrusion may support an internal member contained within the housing.

In the above configuration, the internal member is stably supported by the projection.

In one or more embodiments, the internal member may include a motor.

In the above configuration, the motor is stably supported by the projection.

In one or more embodiments, the internal member may include a controller that controls the motor.

In the above configuration, the controller is stably supported by the protrusions.

In one or more embodiments, the internal member may include a metal case that houses the power transmission mechanism.

In the above configuration, the case is stably supported by the projection.

In one or more embodiments, a label area may be defined on the outer surface of the motor housing.

In the above configuration, the label is applied to the outer surface of the motor housing in a strain-reduced state. The operator can visually recognize the label with reduced distortion.

In one or more embodiments, the motor housing may have a protrusion protruding from the inner surface of the motor housing. The protrusion may support the motor.

In the above configuration, the motor is stably supported by the projection.

In one or more embodiments, the power tool may include a controller that controls the motor. The housing may include a controller housing that houses the controller. A label area may be defined on the outer surface of the controller housing.

In the above configuration, the label is attached to the outer surface of the controller housing in a state in which distortion is reduced. The operator can visually recognize the label with reduced distortion.

In one or more embodiments, the controller housing may have protrusions that protrude from the inner surface of the controller housing. The protrusion may support the controller.

In the above configuration, the controller is stably supported by the protrusions.

In one or more embodiments, the power tool may be an impact driver, hammer drill, hedge trimmer, cutter, circular saw, mower, or grinder.

With the above configuration, the impact driver, hammer drill, hedge trimmer, cutter, circular saw, lawn mower, or grinder are prevented from having poor appearance.

In one or more embodiments, the opening of the recess may be circular.

With the above configuration, the recess is easily formed.

Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The constituent elements of the embodiments described below can be combined as appropriate. Also, some components may not be used.

In the embodiments, the terms "left", "right", "front", "rear", "upper", and "lower" are used to describe the positional relationship of each part. These terms refer to relative position or orientation with respect to the center of the power tool. The left-right direction and the front-rear direction are perpendicular to each other. The front-rear direction and the up-down direction are perpendicular to each other. The vertical direction and the horizontal direction are orthogonal to each other.

A power tool has a motor. In the embodiments, the direction parallel to the rotation axis AX of the motor is appropriately referred to as the axial direction. A radial direction of the rotation axis AX of the motor is appropriately referred to as a radial direction. A direction in which the motor revolves around the rotation axis AX is appropriately referred to as a circumferential direction or a rotation direction.

The position on one side in the axial direction or the direction on one side is appropriately referred to as the one side in the axial direction, and the position on the other side in the axial direction or the direction on the other side is appropriately referred to as the other side in the axial direction. In the radial direction, a position close to or approaching the rotation axis AX of the motor is appropriately referred to as radial inner side, and a position farther from or away from the rotation axis AX of the motor is referred to as radial outer side. The position on one side in the circumferential direction or the direction on one side is appropriately referred to as the one side in the circumferential direction, and the position on the other side in the circumferential direction or the direction on the other side is appropriately referred to as the other side in the circumferential direction.

[First embodiment]
A first embodiment will be described.

<Electric tools>
FIG. 1 is a perspective view showing a power tool 1A according to this embodiment. FIG. 2 is a side view showing the power tool 1A according to this embodiment. FIG. 3 is a front view showing the upper portion of the power tool 1A according to this embodiment. FIG. 4 is a plan view showing the upper portion of the power tool 1A according to this embodiment. FIG. 5 is a longitudinal sectional view showing the power tool 1A according to this embodiment. FIG. 6 is a longitudinal sectional view showing the upper portion of the power tool 1A according to this embodiment. FIG. 7 is a cross-sectional view showing the upper portion of the power tool 1A according to this embodiment.

In this embodiment, the power tool 1A is an impact driver. The power tool 1A includes a housing 2, a rear cover 3, a hammer case 4, a battery mounting portion 5, a motor 6, a reduction mechanism 7, a spindle 8, a striking mechanism 9, an anvil 10, and a chuck sleeve 11. , a fan 12 , a controller 13 , a trigger switch 14 , a normal/reverse switching lever 15 , an operation panel 16 , a mode switching switch 17 and a light 18 .

The housing 2 is made of synthetic resin. In this embodiment, housing 2 is made of nylon. The housing 2 includes a left housing 2L and a right housing 2R arranged to the right of the left housing 2L. As shown in FIG. 2, the left housing 2L and the right housing 2R are fixed by a plurality of screws 2S. The housing 2 is composed of a pair of half-split housings.

The housing 2 includes a motor housing portion 21 , a grip portion 22 and a controller housing portion 23 .

The motor housing portion 21 houses the motor 6 . The motor housing portion 21 is cylindrical.

The grip part 22 is gripped by an operator. The grip portion 22 protrudes downward from the motor housing portion 21 . The trigger switch 14 is provided above the grip portion 22 .

The controller housing portion 23 houses the controller 13 . The controller housing portion 23 is connected to the lower end portion of the grip portion 22 . The outer dimensions of the controller accommodating portion 23 are larger than the outer dimensions of the grip portion 22 in each of the front-rear direction and the left-right direction.

The rear cover 3 is made of synthetic resin. The rear cover 3 is arranged behind the motor accommodating portion 21 . The rear cover 3 accommodates at least part of the fan 12 . The fan 12 is arranged inside the rear cover 3 . The rear cover 3 is arranged to cover the opening at the rear end of the motor housing portion 21 . The outer diameter of the rear cover 3 gradually decreases toward the rear.

The motor housing portion 21 has an intake port 19 . Rear cover 3 has an exhaust port 20 . Air in the outer space of the housing 2 flows into the inner space of the housing 2 through the intake port 19 . Air in the internal space of the housing 2 flows out to the external space of the housing 2 through the exhaust port 20 .

The hammer case 4 is made of metal. In this embodiment, the hammer case 4 is made of aluminum. The hammer case 4 is arranged in front of the motor housing portion 21 . The hammer case 4 is connected to the front portion of the motor housing portion 21 . The hammer case 4 is tubular. The inner diameter of the front portion 4</b>F of the hammer case 4 is smaller than the inner diameter of the rear portion 4</b>R of the hammer case 4 . The rear portion of the hammer case 4 is fitted inside the front portion of the motor housing portion 21 . inserted. The rear portion of the hammer case 4 is fitted inside the front portion of the motor housing portion 21 . A bearing box 24 is arranged inside the rear part of the hammer case 4 . The bearing box 24 is fixed to each of the motor housing portion 21 and the hammer case 4 .

The hammer case 4 houses at least part of the speed reduction mechanism 7 , spindle 8 , striking mechanism 9 and anvil 10 . At least part of the speed reduction mechanism 7 is arranged inside the bearing box 24 .

At least part of the hammer case 4 is covered with a hammer case cover 4A. A bumper 4</b>B is arranged on the front portion 4</b>F of the hammer case 4 . The bumper 4B has an annular shape.

The battery mounting portion 5 is arranged below the controller housing portion 23 . The battery pack 25 is attached to the battery attachment portion 5 . The battery pack 25 is a power source for the power tool 1A. The battery pack 25 is attachable to and detachable from the battery mounting portion 5 . Battery pack 25 includes a secondary battery. In this embodiment, battery pack 25 includes a rechargeable lithium-ion battery. By being attached to the battery attachment portion 5, the battery pack 25 can supply electric power to the power tool 1A. The motor 6 is driven based on power supplied from the battery pack 25 . The controller 13 and operation panel 16 operate based on power supplied from the battery pack 25 .

The motor 6 is the power source of the power tool 1A. The motor 6 is an inner rotor type brushless motor. The motor 6 has a stator 26 and a rotor 27 . At least part of the rotor 27 is arranged inside the stator 26 . Rotor 27 rotates relative to stator 26 . A rotation axis AX of the motor 6 extends in the front-rear direction. The rotor 27 rotates around the rotation axis AX. Rotor 27 is rotatable inside stator 26 .

The stator 26 has a stator core 28 , a front insulator 29 , a rear insulator 30 and coils 31 .

The stator core 28 is arranged radially outside the rotor 27 . Stator core 28 includes a plurality of laminated steel plates. A steel plate is a metal plate whose main component is iron. The stator core 28 is tubular. Stator core 28 has a plurality of teeth that support coils 31 .

The front insulator 29 is provided in front of the stator core 28 . A rear insulator 30 is provided at the rear portion of the stator core 28 . Each of the front insulator 29 and the rear insulator 30 is an electrical insulating member made of synthetic resin. The front insulator 29 is arranged so as to partially cover the surface of the tooth. The rear insulator 30 is arranged so as to partially cover the surfaces of the teeth.

The coil 31 is attached to the stator core 28 via the front insulator 29 and the rear insulator 30 . A plurality of coils 31 are arranged. The coil 31 is arranged around the teeth of the stator core 28 via the front insulator 29 and the rear insulator 30 . Coil 31 and stator core 28 are electrically insulated by front insulator 29 and rear insulator 30 . A plurality of coils 31 are connected via fusing terminals 38 . The coil 31 is connected to the controller 13 via lead wires (not shown).

The rotor 27 rotates around the rotation axis AX. The rotor 27 has a core portion 32 , a shaft portion 33 , a rotor magnet 34 and a sensor magnet 35 . The core portion 32 functions as a rotor core of the rotor 27 . The shaft portion 33 functions as a rotor shaft of the rotor 27 .

Each of the core portion 32 and the shaft portion 33 is made of steel. The shaft portion 33 protrudes in the front-rear direction from the end surface of the core portion 32 . The shaft portion 33 includes a front shaft portion 33</b>F projecting forward from the front end surface of the core portion 32 and a rear shaft portion 33</b>R projecting rearward from the rear end surface of the core portion 32 .

A rotor magnet 34 is fixed to the core portion 32 . The rotor magnet 34 is cylindrical. A rotor magnet 34 is arranged around the core portion 32 .

The sensor magnet 35 is fixed to the core portion 32 . The sensor magnet 35 has an annular shape. The sensor magnet 35 is arranged on the front end surface of the core portion 32 and the front end surface of the rotor magnet 34 .

A sensor substrate 37 is attached to the front insulator 29 . The sensor substrate 37 is fixed to the front insulator 29 with screws 29S. The sensor board 37 has a disc-shaped circuit board with a hole in the center, and a rotation detection element 37S supported by the circuit board. At least part of the sensor substrate 37 faces the sensor magnet 35 . The rotation detection element detects the position of the rotor 27 in the rotational direction by detecting the position of the sensor magnet 35 of the rotor 27 .

The shaft portion 33 is rotatably supported by a rotor bearing 39 . The rotor bearing 39 includes a front rotor bearing 39F that rotatably supports the front shaft portion 33F and a rear rotor bearing 39R that rotatably supports the rear shaft portion 33R.

The front rotor bearing 39F is held by the bearing box 24. As shown in FIG. The bearing box 24 has a recess 24A recessed forward from the rear surface of the bearing box 24 . The front rotor bearing 39F is arranged in the recess 24A. The rear rotor bearing 39R is held by the rear cover 3. As shown in FIG. A front end portion of the front shaft portion 33</b>F is arranged in the internal space of the hammer case 4 via an opening of the bearing box 24 .

A pinion gear 41 is formed at the front end of the front shaft portion 33F. The pinion gear 41 is connected to at least part of the speed reduction mechanism 7 . The front shaft portion 33</b>F is connected to the speed reduction mechanism 7 via a pinion gear 41 .

The speed reduction mechanism 7 is arranged forward of the motor 6 . The reduction mechanism 7 connects the front shaft portion 33</b>F and the spindle 8 . The speed reduction mechanism 7 transmits rotation of the rotor 27 to the spindle 8 . The deceleration mechanism 7 rotates the spindle 8 at a rotational speed lower than that of the front shaft portion 33F. The speed reduction mechanism 7 includes a planetary gear mechanism.

The reduction mechanism 7 has a plurality of gears. Gears of the reduction mechanism 7 are driven by the rotor 27 .

The reduction mechanism 7 has a plurality of planetary gears 42 arranged around the pinion gear 41 and an internal gear 43 arranged around the plurality of planetary gears 42 . Pinion gear 41 , planetary gear 42 , and internal gear 43 are each housed in hammer case 4 . Each of the planetary gears 42 meshes with the pinion gear 41 . Planetary gear 42 is rotatably supported by spindle 8 via pin 42P. Spindle 8 is rotated by planetary gear 42 . The internal gear 43 has internal teeth that mesh with the planetary gear 42 . The internal gear 43 is fixed to the bearing box 24 . The internal gear 43 does not rotate with respect to the bearing box 24.

When the motor 6 is driven to rotate the front shaft portion 33</b>F, the pinion gear 41 rotates and the planetary gear 42 revolves around the pinion gear 41 . The planetary gear 42 revolves while meshing with the inner teeth of the internal gear 43 . Due to the revolution of the planetary gear 42 , the spindle 8 connected to the planetary gear 42 via the pin 42</b>P rotates at a rotational speed lower than that of the shaft portion 33 .

The spindle 8 is arranged forward of at least part of the motor 6 . The spindle 8 is arranged forward of the stator 26 . At least part of the spindle 8 is arranged forward of the rotor 27 . At least part of the spindle 8 is arranged in front of the reduction mechanism 7 . The spindle 8 rotates due to the rotation of the rotor 27 transmitted by the speed reduction mechanism 7 .

The spindle 8 has a flange portion 44 and a rod portion 45 projecting forward from the flange portion 44 . Planetary gear 42 is rotatably supported by flange portion 44 via pin 42P. The rotation axis of the spindle 8 and the rotation axis AX of the motor 6 coincide. The spindle 8 rotates around the rotation axis AX. The spindle 8 is rotatably supported by spindle bearings 46 . A peripheral wall portion 8</b>A is provided at the rear end portion of the spindle 8 so as to surround the spindle bearing 46 . A spindle bearing 46 supports the peripheral wall portion 8A of the spindle 8 .

A bearing box 24 is arranged at least partially around the spindle 8 . A spindle bearing 46 is held in the bearing box 24 . The bearing box 24 has a recess 24B recessed rearward from the front surface of the bearing box 24 . A spindle bearing 46 is positioned in the recess 24B.

The spindle 8 has a supply port 8B for supplying lubricating oil. Lubricants include grease. The supply port 8B is provided on the rod portion 45 . The spindle 8 has an internal space 8C in which lubricating oil is accommodated. The supply port 8B is connected to the internal space 8C. The centrifugal force of the spindle 8 supplies the lubricating oil to at least part of the periphery of the spindle 8 from the supply port 8B.

The striking mechanism 9 strikes the anvil 10 in the rotational direction based on the rotation of the spindle 8 . The striking mechanism 9 has a hammer 47 , a ball 48 and a coil spring 49 . A striking mechanism 9 including a hammer 47 is housed in the hammer case 4 .

The hammer 47 is arranged forward of the speed reduction mechanism 7 . A hammer 47 is arranged around the spindle 8 . A hammer 47 is held on the spindle 8 . A ball 48 is arranged between the spindle 8 and the hammer 47 . A coil spring 49 is supported by each of the spindle 8 and the hammer 47 .

The hammer 47 is cylindrical. A hammer 47 is arranged around the rod portion 45 . Hammer 47 has a hole 57 in which rod portion 45 is arranged. Hammer 47 is rotatable together with spindle 8 . The rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 are aligned. The hammer 47 rotates around the rotation axis AX.

Ball 48 is made of metal such as steel. Ball 48 is arranged between rod portion 45 and hammer 47 . The spindle 8 has a spindle groove 50 in which at least part of the balls 48 are arranged. The spindle groove 50 is provided on part of the outer surface of the rod portion 45 . Hammer 47 has a hammer groove 51 in which at least part of ball 48 is arranged. A hammer groove 51 is provided in a portion of the inner surface of the hammer 47 . Ball 48 is positioned between spindle groove 50 and hammer groove 51 . The ball 48 can roll inside the spindle groove 50 and inside the hammer groove 51 respectively. Hammer 47 is movable with ball 48 . The spindle 8 and the hammer 47 can move relative to each other in the axial direction and the rotational direction within a movable range defined by the spindle groove 50 and the hammer groove 51 .

The coil spring 49 generates an elastic force that moves the hammer 47 forward. A coil spring 49 is arranged between the flange portion 44 and the hammer 47 . A ring-shaped recess 53 is provided on the rear surface of the hammer 47 . The recess 53 is recessed forward from the rear surface of the hammer 47 . A washer 54 is provided inside the recess 53 . A rear end portion of the coil spring 49 is supported by the flange portion 44 . A front end portion of the coil spring 49 is arranged inside the recess 53 and supported by the washer 54 .

At least part of the anvil 10 is arranged forward of the hammer 47 . The anvil 10 has an insertion hole 55 into which a tip tool is inserted. An insertion hole 55 is provided at the front end of the anvil 10 . The tip tool is attached to the anvil 10. - 特許庁The anvil 10 also has a hole 58 in which the front end of the rod portion 45 is arranged. A hole 58 is provided at the rearward end of the anvil 10 . The front end of rod portion 45 is positioned in hole 58 .

Anvil 10 is rotatable together with hammer 47 . The rotation axis of the anvil 10, the rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 coincide. The anvil 10 rotates around the rotation axis AX. Anvil 10 is rotatably supported by a pair of anvil bearings 56 . A pair of anvil bearings 56 are held by the hammer case 4 .

The hammer 47 has a tubular hammer body 47A and a hammer protrusion 47B. The recess 53 is provided on the rear surface of the hammer body 47A. The hammer protrusion 47B is provided on the front portion of the hammer body 47A. Two hammer protrusions 47B are provided. The hammer protrusion 47B protrudes forward from the front portion of the hammer body 47A.

The anvil 10 has a rod-shaped anvil body 10A and an anvil protrusion 10B. The insertion hole 55 is provided at the front end of the anvil body 10A. The tip tool is attached to the anvil body 10A. Anvil protrusion 10B is provided at the rear end of anvil 10 . Two anvil protrusions 10B are provided. The anvil protrusion 10B protrudes radially outward from the rear end of the anvil body 10A.

The hammer protrusion 47B and the anvil protrusion 10B are contactable. The anvil 10 rotates together with the hammer 47 and the spindle 8 by driving the motor 6 while the hammer projection 47B and the anvil projection 10B are in contact with each other.

Anvil 10 is an output portion of power tool 1A driven by motor 6 . Anvil 10 is rotated by motor 6 via spindle 8 . The anvil 10 is struck by a hammer 47 in the rotational direction. For example, when the load acting on the anvil 10 increases during a screw tightening operation, a situation may occur in which the anvil 10 cannot be rotated only by the power generated by the motor 6 . When the power generated by the motor 6 alone cannot rotate the anvil 10, the anvil 10 and the hammer 47 stop rotating. The spindle 8 and the hammer 47 are relatively movable in the axial and circumferential directions via the balls 48 . Even if the rotation of the hammer 47 stops, the rotation of the spindle 8 is continued by the power generated by the motor 6 . When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the balls 48 move backward while being guided by the spindle groove 50 and the hammer groove 51, respectively. The hammer 47 receives force from the ball 48 and moves backward along with the ball 48 . That is, the hammer 47 is moved rearward by the rotation of the spindle 8 while the rotation of the anvil 10 is stopped. By moving the hammer 47 rearward, the contact between the hammer protrusion 47B and the anvil protrusion 10B is released.

The coil spring 49 generates an elastic force that moves the hammer 47 forward. The hammer 47 that has moved backward moves forward due to the elastic force of the coil spring 49 . Hammer 47 receives a rotational force from ball 48 as it moves forward. That is, the hammer 47 moves forward while rotating. When the hammer 47 rotates and moves forward, the hammer protrusion 47B contacts the anvil protrusion 10B while rotating. As a result, the anvil protrusion 10B is struck in the rotational direction by the hammer protrusion 47B. Both the power of the motor 6 and the inertial force of the hammer 47 act on the anvil 10 . Therefore, the anvil 10 can rotate around the rotation axis AX with high torque.

A chuck sleeve 11 is arranged around the front of the anvil 10 . The chuck sleeve 11 holds the tip tool inserted into the insertion hole 55 .

The fan 12 is arranged behind the stator 26 of the motor 6 . Fan 12 generates airflow for cooling motor 6 . The fan 12 has a smaller diameter than the stator core 28 . Since the outer diameter of the fan 12 is smaller than the outer diameter of the stator core 28, the size of the rear cover 3 accommodating the fan 12 is reduced.

Fan 12 is fixed to at least a portion of rotor 27 . The fan 12 is fixed to the rear portion of the rear shaft portion 33R via a bush 61. As shown in FIG. Fan 12 is arranged between rear rotor bearing 39R and stator 26 . The fan 12 rotates as the rotor 27 rotates. As the rear shaft portion 33R rotates, the fan 12 rotates together with the rear shaft portion 33R. As the fan 12 rotates, the air in the outer space of the housing 2 flows into the inner space of the housing 2 through the intake port 19 . The air that has flowed into the internal space of the housing 2 cools the motor 6 by circulating through the internal space of the housing 2 . The air that has flowed through the internal space of the housing 2 flows out to the external space of the housing 2 through the exhaust port 20 as the fan 12 rotates.

The controller 13 is housed in the controller housing portion 23 . A controller 13 controls the motor 6 . The controller 13 outputs control signals for controlling the motor 6 . The controller 13 includes a printed circuit board (PCB). A printed wiring board includes a printed wiring board (PWB) and a plurality of electronic components mounted on the printed wiring board. Electronic components mounted on a printed wiring board include a processor such as a CPU (Central Processing Unit), a non-volatile memory such as ROM (Read Only Memory) or storage, a volatile memory such as RAM (Random Access Memory), A transistor and a resistor are exemplified.

The controller 13 switches the control mode of the motor 6 based on the work content of the power tool 1A. A control mode of the motor 6 refers to a control method or control pattern of the motor 6 .

The trigger switch 14 is provided on the grip portion 22 . A trigger switch 14 is operated by an operator to start the motor 6 . The trigger switch 14 includes a trigger member 14A and a switch body 14B. The switch body 14B is housed in the grip portion 22. As shown in FIG. The trigger member 14A protrudes forward from the upper front portion of the grip portion 22 . The trigger member 14A is operated by an operator. By operating the trigger member 14A, the motor 6 is switched between driving and stopping.

The forward/reverse switching lever 15 is provided above the grip portion 22 . The forward/reverse switching lever 15 is operated by an operator. By operating the forward/reverse switching lever 15, the rotation direction of the motor 6 is switched from one of the forward rotation direction and the reverse rotation direction to the other. By switching the rotation direction of the motor 6, the rotation direction of the spindle 8 is switched.

The operation panel 16 is provided in the controller housing portion 23 . The operation panel 16 is operated by an operator to switch control modes of the motor 6 . The operation panel 16 has a plate shape. The controller housing portion 23 has an opening 63 in which the operation panel 16 is arranged. The opening 63 is provided on the upper surface of the controller housing portion 23 in front of the grip portion 22 . At least part of the operation panel 16 is arranged in the opening 63 .

The operation panel 16 has an impact force switch 64 and a dedicated switch 65 . Each of the impact force switch 64 and the dedicated switch 65 is operated by the operator. The control mode of the motor 6 is switched by operating at least one of the striking force switch 64 and the dedicated switch 65 .

The mode changeover switch 17 is provided above the trigger member 14A. The mode changeover switch 17 is operated by an operator. The control mode of the motor 6 is switched by operating the mode switch 17 .

A light 18 illuminates the front of the anvil 10 . The light 18 emits illumination light that illuminates the front of the power tool 1A. Light 18 is held at the front end of motor housing 21 . The light 18 includes, for example, a light emitting diode (LED).

The light 18 includes a first light 18L arranged on the left side of the hammer case 4 and a second light 18R arranged on the right side of the hammer case 4. The first light 18L is arranged on the left side of the anvil 10. As shown in FIG. A second light 18R is arranged on the right side of the anvil 10 .

<Operation of the power tool>
Next, operation of the power tool 1A will be described. For example, when a screw tightening operation is performed on an object to be processed, a tip tool (driver bit) used for the screw tightening operation is inserted into the insertion hole 55 of the anvil 10 . The tip tool inserted into the insertion hole 55 is held by the chuck sleeve 11 . After the tip tool is attached to the anvil 10, the operator grasps the grip portion 22 and operates the trigger switch 14. - 特許庁When the trigger switch 14 is operated, power is supplied from the battery pack 25 to the motor 6 and the motor 6 is activated. At the same time when the motor 6 is started, the light 18 is turned on. When the motor 6 is started, the shaft portion 33 of the rotor 27 rotates. When the shaft portion 33 rotates, the rotational force of the shaft portion 33 is transmitted to the planetary gear 42 via the pinion gear 41 . The planetary gear 42 revolves around the pinion gear 41 while rotating while meshing with the internal teeth of the internal gear 43 . Planetary gear 42 is rotatably supported by spindle 8 via pin 42P. The revolution of the planetary gear 42 causes the spindle 8 to rotate at a rotational speed lower than that of the shaft portion 33 .

When spindle 8 rotates while hammer projection 47B and anvil projection 10B are in contact, anvil 10 rotates together with hammer 47 and spindle 8 . As the anvil 10 rotates, the screw tightening work progresses.

When a load exceeding a predetermined value acts on the anvil 10 as the screw tightening operation progresses, the anvil 10 and the hammer 47 stop rotating. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the hammer 47 moves backward. By moving the hammer 47 rearward, the contact between the hammer protrusion 47B and the anvil protrusion 10B is released. The hammer 47 that has moved backward moves forward while rotating due to the elastic force of the coil spring 49 . As the hammer 47 rotates and moves forward, the anvil 10 is hit in the rotational direction by the hammer 47 . As a result, the anvil 10 rotates around the rotation axis AX with high torque. Therefore, the screw is tightened to the workpiece with a high torque.

<label>
FIG. 8 is a partially exploded perspective view of the power tool 1A according to this embodiment. As shown in FIGS. 2, 7, and 8, the power tool 1A includes a concave portion 81 provided in a label area 71 defined on a portion of the outer surface of the housing 2, and a label 91 affixed to the label area 71. Prepare.

In this embodiment, the label area 71 is defined on the outer surface of the motor housing portion 21 . A label area 71 is defined on a portion of the outer surface on the right side of the motor housing portion 21 . A label area 71 is defined on a portion of the outer surface of the right housing 2R. In this embodiment, the outer shape of the label area 71 is elongated in the front-rear direction. The outer shape of the label area 71 is substantially octagonal.

A plurality of recesses 81 are provided at intervals in the label area 71 .

The label 91 is a sheet-shaped member on which data relating to the power tool 1A is printed. A label 91 is attached to the label area 71 with an adhesive. The label 91 has a joint surface 91A facing the label area 71 and a printing surface 91B on which data relating to the power tool 1A is printed. The bonding surface 91A of the label 91 and the label area 71 are bonded with an adhesive. With the bonding surface 91A of the label 91 and the label area 71 bonded together, the printing surface 91B of the label 91 faces outward.

The outer shape of the label 91 and the outer shape of the label area 71 are substantially the same. The label 91 is attached to the label area 71 so that the peripheral edge of the label 91 and the peripheral edge of the label area 71 are aligned. A label 91 is attached to the label area 71 so as to cover the recess 81 . A label 91 is attached to the label area 71 so as to hide each of the recesses 81 . When the label 91 is attached to the label area 71, the operator cannot visually recognize the recess 81. FIG.

The label 91 is made of synthetic resin. As a synthetic resin forming the label 91, polyethylene terephthalate resin (PET: Poly Ethylene Terephthalate) is exemplified. The thickness of the sheet member of the label 91 is, for example, 10 μm or more and 50 μm or less.

Data relating to the power tool 1A is printed on the printing surface 91B of the label 91 with ink. Examples of data related to the electric power tool 1A include the product name of the electric power tool 1A, specifications of the electric power tool 1A, and precautions when using the electric power tool 1A. Characters, numbers, or symbols are printed as data related to the power tool 1A.

FIG. 9 is a perspective view showing part of the outer surface of the right housing 2R according to this embodiment. FIG. 10 is a perspective view showing part of the inner surface of the right housing 2R according to this embodiment. FIG. 11 is a cross-sectional view showing part of the right housing 2R according to this embodiment. 11 corresponds to a cross-sectional view taken along the line AA of FIG. 9. FIG. FIG. 12 is a perspective view showing the recess 81 according to this embodiment.

The right housing 2R will be exclusively described below. The structure of the left housing 2L is substantially the same as that of the right housing 2R. Note that the recess 81 is not provided in the left housing 2L.

As shown in FIG. 9, a plurality of recesses 81 are provided at intervals in the vertical direction. Further, a plurality of recesses 81 are provided at intervals in the front-rear direction.

In the following description, of the plurality of recesses 81 provided in the front-rear direction, the plurality of recesses 81 provided furthest forward will be referred to as recesses 81A. , recessed portions 81B, the plurality of recessed portions 81 provided forwardly next to the recessed portions 81B are appropriately referred to as recessed portions 81C, and the plurality of recessed portions 81 provided forwardly next to the recessed portions 81C are appropriately referred to as recessed portions 81D. A plurality of recesses 81 provided on the rear side are appropriately referred to as recesses 81E.

Four concave portions 81A are provided at intervals in the vertical direction. The positions of the four concave portions 81A in the front-rear direction are substantially equal.

Five concave portions 81B are provided at intervals in the vertical direction. The positions of the five concave portions 81B in the front-rear direction are substantially equal.

Four recesses 81C are provided at intervals in the vertical direction. The positions of the four concave portions 81C in the front-rear direction are substantially equal.

Five concave portions 81D are provided at intervals in the vertical direction. The positions of the five recesses 81D in the front-rear direction are substantially equal.

Four recesses 81E are provided at intervals in the vertical direction. The positions of the four concave portions 81E in the front-rear direction are substantially equal.

As shown in FIGS. 7 and 10, the right housing 2R has a protrusion 101 protruding radially inward from the inner surface of the right housing 2R. The convex portion 101 is provided on the inner surface of the motor housing portion 21 . The convex portion 101 protrudes radially inward from the inner surface of the motor housing portion 21 . A plurality of protrusions 101 are provided at intervals in the front-rear direction.

In the following description, of the plurality of protrusions 101 provided in the front-rear direction, the protrusion 101 provided most forward is appropriately referred to as a protrusion 101A, and the protrusion 101 provided next to the protrusion 101A is referred to as the protrusion 101A. Protruding portion 101B is arbitrarily referred to as convex portion 101B, the protruding portion 101 provided forwardly next to protruding portion 101B is arbitrarily referred to as protruding portion 101C, and the protruding portion 101 provided forwardly next to protruding portion 101C is arbitrarily referred to as protruding portion 101D, , and the rearmost convex portion 101 is appropriately referred to as a convex portion 101E.

The convex portion 101A is provided to extend vertically on the inner surface of the right housing 2R. The convex portion 101B is provided to extend vertically on the inner surface of the right housing 2R. The convex portion 101C is provided to extend vertically on the inner surface of the right housing 2R. The convex portion 101D is provided to extend vertically on the inner surface of the right housing 2R. The convex portion 101E is provided to extend vertically on the inner surface of the right housing 2R.

The convex portion 101 supports internal members housed in the housing 2 . In this embodiment, the convex portion 101 supports the internal member housed in the motor housing portion 21 . Internal members housed in the motor housing portion 21 include the motor 6 , the bearing box 24 and the hammer case 4 . Each of the bearing box 24 and the hammer case 4 accommodates a power transmission mechanism that transmits power of the motor 6 to the anvil 10 . Each of the bearing box 24 and the hammer case 4 is made of metal. The bearing box 24 accommodates at least part of the speed reduction mechanism 7 as a power transmission mechanism. The hammer case 4 accommodates a speed reduction mechanism 7, a spindle 8, and a striking mechanism 9 as power transmission mechanisms. The impact mechanism 9 can be regarded as a power conversion mechanism that converts the rotational force of the motor 6 into impact force.

Each of the protrusions 101A and 101B supports the hammer case 4 . At least part of the convex portion 101A contacts the hammer case 4 . At least part of the convex portion 101B contacts the hammer case 4 .

Each of the protrusions 101C and 101D supports the bearing box 24 . At least part of the protrusion 101C contacts the bearing box 24 . At least part of the protrusion 101D contacts the bearing box 24 .

The convex portion 101E supports the motor 6. As shown in FIG. At least part of the convex portion 101E contacts the stator 26 .

The right housing 2</b>R includes a thin portion 40 and a thick portion 60 that is thicker than the thin portion 40 . Thin portion 40 and thick portion 60 are adjacent to each other. Thin portion 40 does not include protrusion 101 . Thick portion 60 includes convex portion 101 .

Label area 71 is defined to include the outer surface of thin portion 40 and the outer surface of thick portion 60 .

In this embodiment, the recess 81 is provided on the outer surface of the thick portion 60 . The convex portion 101 is provided right behind the concave portion 81 . The position of the concave portion 81 and the position of at least a portion of the convex portion 101 are aligned in each of the front-back direction and the up-down direction.

The convex portion 101A is provided directly behind the concave portion 81A. A plurality of recesses 81A are provided at intervals in the vertical direction on the outer surface of the thick portion 60 including the protrusions 101A along the extending direction of the protrusions 101A.

The convex portion 101B is provided right behind the concave portion 81B. A plurality of recesses 81B are provided at intervals in the vertical direction on the outer surface of the thick portion 60 including the protrusions 101B along the extending direction of the protrusions 101B.

The convex portion 101C is provided directly behind the concave portion 81C. A plurality of recesses 81C are provided at intervals in the vertical direction on the outer surface of the thick portion 60 including the protrusion 101C along the extending direction of the protrusion 101C.

The convex portion 101D is provided directly behind the concave portion 81D. A plurality of recesses 81D are provided in the outer surface of the thick portion 60 including the protrusions 101D at intervals in the vertical direction along the extending direction of the protrusions 101D.

The convex portion 101E is provided directly behind the concave portion 81E. A plurality of recesses 81E are provided in the outer surface of the thick portion 60 including the protrusions 101E at intervals in the vertical direction along the extending direction of the protrusions 101E.

As shown in FIG. 11, the concave portion 81D is provided on the outer surface of the thick portion 60 including the convex portion 101D. The convex portion 101D is arranged right behind the concave portion 81D. The position of the concave portion 81D and the position of at least a portion of the convex portion 101D match in each of the front-rear direction and the vertical direction.

The convex portion 101D includes a first portion 67 and a second portion 68 protruding radially inward from the first portion 67 . The first portion 67 is provided to extend vertically on the inner surface of the right housing 2R. Two second portions 68 are provided with an interval therebetween in the vertical direction. The convex portion 101D supports the bearing box 24 as described above. The first portion 67 contacts the outer surface of the bearing box 24 . The second portion 68 fits into a recess provided in the outer surface of the bearing box 24 .

The housing 2 has a thin portion 60A including a first portion 67 and a thick portion 60B including a second portion 68. As shown in FIG. That is, in the present embodiment, the thick portion 60 including the convex portion 101D has a thin portion 60A and a thick portion 60B. The thickness Tb of the thick portion 60B is thicker than the thickness Ta of the thin portion 60A.

Five concave portions 81D are provided at intervals in the vertical direction along the direction in which the first portion 67 extends. In the following description, of the plurality of recesses 81D provided in the vertical direction, the uppermost recess 81D will be referred to as a recess 81D1, and the recess 81D located next to the recess 81D1 will be referred to as a recess 81D. 81D2, and the recess 81D arranged below the recess 81D2 is appropriately called a recess 81D3, and the recess 81D arranged below the recess 81D3 is appropriately called a recess 81D4, and is arranged at the lowest position. The recessed portion 81D is appropriately referred to as a recessed portion 81D5.

The recess 81D is formed in each of the outer surface of the thin portion 60A and the outer surface of the thick portion 60B. The concave portion 81D1 and the concave portion 81D2 are arranged on the outer surface of the upper thick portion 60B of the two thick portions 60B arranged in the vertical direction. The concave portion 81D4 and the concave portion 81D5 are arranged on the outer surface of the lower thick portion 60B of the two thick portions 60B arranged in the vertical direction. The recess 81D3 is arranged on the outer surface of the thin portion 60A between the upper thick portion 60B and the lower thick portion 60B.

The number of recesses 81D formed on the outer surface of the thick portion 60B is greater than the number of recesses 81D formed on the outer surface of the thin portion 60A. In the example shown in FIG. 11, two recesses 81D (81D1, 81D2) are formed on the outer surface of the upper thick portion 60B. Two recesses 81D (81D4, 81D5) are formed on the outer surface of the lower thick portion 60B. One recess 81D (81D3) is formed in the outer surface of the thin portion 60A.

Depth Db of recess 81D formed in the outer surface of thick portion 60B is deeper than depth Da of recess 81D formed in the outer surface of thin portion 60A.

The area Ab of the opening of the recess 81D formed on the outer surface of the thick portion 60B is larger than the area Aa of the opening of the recess 81D formed on the outer surface of the thin portion 60A.

At least one of the convex portions 101A, 101B, 101C, and 101E may have the first portion 67 and the second portion 68 as well as the convex portion 101D.

As shown in FIG. 12, in this embodiment, the opening of the recess 81 is circular. The inner surface of the recess 81 is substantially cylindrical. The depth D of the concave portion 81 is 1 mm or more and 3 mm or less. In this embodiment, the average value of the depth D of the plurality of recesses 81 is approximately 1.5 mm. The diameter R of the opening of the recess 81 is 1 mm or more and 3 mm or less. In this embodiment, the average value of the diameter R of the openings of the plurality of recesses 81 is approximately 1.5 mm. A gap G between the recesses 81 adjacent to each other is larger than the diameter R. In this embodiment, the gap G is 2 mm or more and 6 mm or less.

<effect>
As described above, according to the present embodiment, the electric power tool 1A includes the motor 6, the anvil 10 that is the output portion driven by the motor 6, and the motor housing portion 21 that houses the motor 6. and a housing 2 of The power tool 1</b>A includes a recess 81 provided in a label area 71 defined on a portion of the outer surface of the housing 2 . The power tool 1</b>A has a label 91 attached to the label area 71 .

In the above configuration, the concave portion 81 is provided on the outer surface of the housing 2, thereby improving molding shrinkage of the housing 2 and suppressing the occurrence of sink marks. Since the concave portion 81 is provided in the label area 71, the generation of sink marks in the label area 71 is suppressed. Since the label 91 is attached to the label area 71 in which the occurrence of sink marks is suppressed, the distortion of the label 91 is suppressed. Therefore, poor appearance of the label is suppressed, and the operator can correctly read the data printed on the label 91 . Also, the label 91 is attached to the label area 71 so as to hide the concave portion 81 . Therefore, the appearance defect of the power tool 1A is suppressed.

In this embodiment, a plurality of recesses 81 are provided in the label area 71 at intervals.

The above configuration effectively suppresses the occurrence of sink marks. In addition, since the size of the opening of each recess 81 can be reduced, when the label 91 is stuck on the label area 71 , the label 91 is prevented from falling inside the recess 81 . The label 91 is affixed to the label area 71 with the distortion reduced.

In this embodiment, the housing 2 includes a thin portion 40 and a thick portion 60 that is thicker than the thin portion 40 . Label area 71 is defined to include the outer surface of thin portion 40 and the outer surface of thick portion 60 .

In the configuration described above, the label area 71 can be defined in any area of the outer surface of the housing 2 .

In this embodiment, the recess 81 is provided on the outer surface of the thick portion 60 .

The above configuration effectively suppresses the occurrence of sink marks.

In this embodiment, the recesses 81 are formed on the outer surface of the thin portion 60A and the outer surface of the thick portion 60B. The number of recesses 81 formed on the outer surface of the thick portion 60B is greater than the number of recesses 81 formed on the outer surface of the thin portion 60A.

In the above configuration, since the number of recesses 81 formed on the outer surface of the thick portion 60B is greater than the number of recesses 81 formed on the outer surface of the thin portion 60A, molding shrinkage of the housing 2 is effectively improved. The occurrence of sink marks is suppressed.

In this embodiment, the recesses 81 are formed on the outer surface of the thin portion 60A and the outer surface of the thick portion 60B. Depth Db of recess 81 formed in the outer surface of thick portion 60B is deeper than depth Da of recess 81 formed in the outer surface of thin portion 60A.

In the above configuration, since the depth Db of the recess 81 formed on the outer surface of the thick portion 60B is greater than the depth Da of the recess 81 formed on the outer surface of the thin portion 60A, the molding shrinkage of the housing 2 is effective. and suppresses the occurrence of sink marks.

In this embodiment, the recesses 81 are formed on the outer surface of the thin portion 60A and the outer surface of the thick portion 60B. The area Ab of the opening of the recess 81 formed on the outer surface of the thick portion 60B is larger than the area Aa of the opening of the recess 81 formed on the outer surface of the thin portion 60A.

In the above configuration, since the area Ab of the opening of the recess 81 formed on the outer surface of the thick portion 60B is larger than the area Aa of the opening of the recess 81 formed on the outer surface of the thin portion 60A, molding shrinkage of the housing 2 occurs. It is effectively improved and the occurrence of sink marks is suppressed.

In this embodiment, the housing 2 has a protrusion 101 protruding from the inner surface of the housing 2 . The convex portion 101 includes a first portion 67 and a second portion 68 protruding from the first portion 67 . Thin portion 60A includes a first portion 67 . Thick portion 60B includes second portion 68 .

In the above configuration, when the protrusion 101 itself has a plurality of portions with different thicknesses, the occurrence of sink marks is effectively suppressed.

In this embodiment, the convex portion 101 is provided so as to extend in the vertical direction. A plurality of recesses 81 are provided at intervals in the vertical direction.

In the above configuration, when the convex portion 101 is provided to extend in the vertical direction, the occurrence of sink marks is effectively suppressed by providing a plurality of the concave portions 81 at intervals in the vertical direction.

In this embodiment, a plurality of protrusions 101 are provided in the front-rear direction orthogonal to the up-down direction. A plurality of recesses 81 are provided at intervals in the front-rear direction.

In the above configuration, when a plurality of protrusions 101 are provided in the front-rear direction, the occurrence of sink marks is effectively suppressed by providing a plurality of recesses 81 spaced apart in the front-rear direction.

In this embodiment, the convex portion 101 supports internal members housed in the housing 2 .

In the above configuration, the internal member is stably supported by the convex portion 101 .

In embodiments, the internal member includes a motor 6 .

In the above configuration, the motor 6 is stably supported by the convex portion 101 .

In this embodiment, the internal members include a metal bearing box 24 and hammer case 4 that house the speed reduction mechanism 7 , spindle 8 and striking mechanism 9 .

In the above configuration, the bearing box 24 and the hammer case 4 are stably supported by the convex portion 101 .

In this embodiment, the label area 71 is defined on the outer surface of the motor housing portion 21 .

In the above configuration, the label 91 is affixed to the outer surface of the motor accommodating portion 21 with reduced strain. The operator can visually recognize the label 91 with reduced distortion.

In this embodiment, the motor housing portion 21 has a convex portion 101 protruding from the inner surface of the motor housing portion 21 . The convex portion 101 supports the motor 6 .

In the above configuration, the motor 6 is stably supported by the convex portion 101 .

In this embodiment, the opening of the recess 81 is circular.

With the above configuration, the recess 81 is easily formed.

<Modification>
13, 14, and 15 are perspective views showing a recessed portion 81 according to a modified example of this embodiment. As shown in FIG. 13, the opening of the recess 81 may be circular and the inner surface of the recess 81 may be hemispherical. As shown in FIGS. 14 and 15, the opening of the recess 81 may be polygonal. In the example shown in FIG. 14, the opening of the recess 81 is square. The opening of the recess 81 shown in FIG. 15 is hexagonal.

FIG. 16 is a cross-sectional view schematically showing part of the right housing 2R according to a modification of this embodiment. As described above, the right housing 2</b>R includes the thin portion 40 and the thick portion 60 that is thicker than the thin portion 40 . Thin portion 40 does not include protrusion 101 . Thick portion 60 includes convex portion 101 . Thickness T2 of thick portion 60 is thicker than thickness T1 of thin portion 40 .

The recess 81 may be formed not only on the outer surface of the thick portion 60 but also on the outer surface of the thin portion 40 . That is, as shown in FIG. 16, the recesses 81 may be formed on the outer surface of the thin portion 40 and the outer surface of the thick portion 60, respectively.

In the example shown in FIG. 16, two thick portions 60 are arranged with an interval in the front-rear direction. The thin portion 40 is arranged between the thick portion 60 on the front side and the thick portion 60 on the rear side.

The number of recesses 81 formed on the outer surface of thick portion 60 is greater than the number of recesses 81 formed on the outer surface of thin portion 40 . In the example shown in FIG. 16, two recesses 81 are formed in the outer surface of one thick portion 60 . One recess 81 is formed in the outer surface of one thin portion 40 .

Depth D2 of recess 81 formed in the outer surface of thick portion 60 is deeper than depth D1 of recess 81 formed in the outer surface of thin portion 40 .

The area A2 of the opening of the recess 81 formed on the outer surface of the thick portion 60 is larger than the area A1 of the opening of the recess 81 formed on the outer surface of the thin portion 40 .

As described above, the housing 2 has the convex portion 101 that protrudes from the inner surface of the housing 2 . Thin portion 40 does not include protrusion 101 , and thick portion 60 includes protrusion 101 .

With the above configuration, the occurrence of sink marks is effectively suppressed when the housing 2 has a plurality of portions with different thicknesses.

[Second embodiment]
A second embodiment will be described. Descriptions of components that are the same as or equivalent to those of the above-described embodiments will be simplified or omitted.

FIG. 17 is a perspective view showing a power tool 1B according to this embodiment. FIG. 18 is a longitudinal sectional view showing the power tool 1B according to this embodiment. FIG. 19 is a cross-sectional view showing a power tool 1B according to this embodiment. FIG. 19 corresponds to a cross-sectional view taken along line BB of FIG. FIG. 20 is a perspective view showing the label area 72 and the label 92 according to this embodiment. FIG. 21 is a perspective view showing the vicinity of the label area 72 according to this embodiment.

In this embodiment, the power tool 1B is a hammer drill. The power tool 1B includes a housing 202, a case 402, a battery mounting portion 502, a motor 602, a striking mechanism 902, a chuck sleeve 1102, a controller 1302, and a trigger switch 1402.

Housing 202 includes a motor housing portion 2102 , a grip portion 2202 , a controller housing portion 2302 and a body housing portion 2402 .

The motor housing portion 2102 houses the motor 602 .

The grip portion 2202 is gripped by the operator. The upper part of the grip part 2202 is connected to the main housing part 2402 . A lower portion of the grip portion 2202 is connected to the motor housing portion 2102 . Trigger switch 1402 is located on grip portion 2202 .

The controller housing section 2302 houses the controller 1302 . The controller housing portion 2302 is connected to the lower portion of the motor housing portion 2102 and the lower portion of the grip portion 2202 respectively. The battery mounting portion 502 is arranged below the controller housing portion 2302 . Two battery packs 25 are attached to the battery attachment portion 502 .

The body accommodating portion 2402 accommodates the case 402 . Case 402 is made of metal. Case 402 accommodates striking mechanism 902 . The main housing portion 2402 is connected to the upper portion of the motor housing portion 2102 and the front portion of the grip portion 2202 respectively.

Motor 602 has a rotor shaft 300 . An upper portion of the rotor shaft 300 is arranged inside the main housing portion 2402 .

The striking mechanism 902 has a tubular tool holder 301 and a cylinder 302 . The tool holder 301 is held in the front portion of the main housing portion 2402 . The cylinder 302 is held in the rear portion of the main housing portion 2402 . A crankshaft 303 is arranged behind the cylinder 302 . A gear 304 is provided below the crankshaft 303 . Gear 304 meshes with a pinion gear provided at the upper end of rotor shaft 300 .

A piston 305 is housed in the cylinder 302 . Piston 305 is movable in the front-rear direction. Piston 305 is connected to crankshaft 303 via connecting rod 306 . A striker 308 is arranged in front of the piston 305 via an air chamber 307 . The striker 308 is movable in the front-rear direction. In front of the striker 308, an impact bolt 309 with which the tip tool abuts is arranged. A chuck sleeve 1102 is provided at the front end of the tool holder 301 .

The grip portion 2202 can move relative to the motor housing portion 2102 and the body housing portion 2402 in the front-rear direction. A sensor unit 310 that detects movement of the grip unit 2202 is provided behind the motor 602 . A rotational speed adjustment dial 311 is provided below the sensor section 310 . The controller 1302 drives the motor 602 at the rotation speed set by operating the rotation speed adjustment dial 311 .

When the tip tool attached to the tool holder 301 is not pressed against the workpiece, the grip part 2202 is arranged at the retracted position. When the trigger switch 1402 is operated, the controller 1302 rotates the motor 602 at a preset low rotation speed. When the motor 602 is driven and the rotor shaft 300 rotates, the crankshaft 303 rotates through the gear 304 and the piston 305 moves forward and backward through the connecting rod 306 . As a result, the striker 308 moves forward and backward through the air chamber 307 .

When the tip tool is pressed against the workpiece, the grip part 2202 moves forward. As the grip portion 2202 advances, the sensor portion 310 detects movement of the grip portion 2202 . The controller 1302 drives the motor 602 at a high rotation speed set by the rotation speed adjustment dial 311 based on the detection signal from the sensor section 310 .

A label area 72 is defined on a portion of the outer surface of the body housing portion 2402 . A label area 72 is defined on the upper surface of the main housing portion 2402 . A plurality of recesses 82 are provided in the label area 72 . A label 92 is applied to the label area 72 so as to cover the recess 82 .

As shown in FIG. 19, the main housing portion 2402 has a convex portion 102 protruding from the inner surface of the main housing portion 2402 . The convex portion 102 protrudes downward from the upper portion of the inner surface of the main housing portion 2402 . Two protrusions 102 are provided in the left-right direction. The concave portion 82 is provided on the outer surface of the thick portion of the main housing portion 2402 including the convex portion 102 . The convex portion 102 is provided directly behind the concave portion 82 . The convex portion 102 supports the case 402 .

[Third embodiment]
A third embodiment will be described. Descriptions of components that are the same as or equivalent to those of the above-described embodiments will be simplified or omitted.

FIG. 22 is a perspective view showing a power tool 1C according to this embodiment. FIG. 23 is a vertical cross-sectional view showing a power tool 1C according to this embodiment. FIG. 24 is a cross-sectional view showing a power tool 1C according to this embodiment. FIG. 24 corresponds to a cross-sectional view taken along line CC of FIG. FIG. 25 is a perspective view showing the label area 73 and the label 93 according to this embodiment. FIG. 26 is a perspective view showing the vicinity of the label area 73 according to this embodiment.

In this embodiment, the power tool 1C is a hammer drill. The power tool 1</b>C includes a housing 203 , a case 403 , a battery mounting portion 503 , a motor 603 , a controller 1303 and a trigger switch 1403 .

Housing 203 includes a gear housing portion 2403 , a motor housing portion 2103 , a grip portion 2203 and a controller housing portion 2303 .

The gear housing portion 2403 houses the power transmission mechanism 312 and the tool holder 313 . An auxiliary handle 329 is attached to the gear housing portion 2403 . A front end portion of the gear housing portion 2403 is a cylindrical barrel portion 314 . A tip tool is attached to the tool holder 313 . The tool holder 313 is arranged inside the barrel portion 314 . The tool holder 313 supports the tip tool movably in the front-rear direction. The tool holder 313 holds the tip tool so that it does not rotate. The power transmission mechanism 312 includes a motion conversion mechanism 315 , a striking element 316 and a rotation transmission mechanism 317 . The power transmission mechanism 312 is housed in the case 403 . Case 403 is made of metal. Gear housing portion 2403 supports case 403 .

The motion conversion mechanism 315 converts the rotary motion of the motor 603 into linear motion and transmits it to the striking element 316 . Motion conversion mechanism 315 includes an intermediate shaft 318 , a rotating body 319 , a swinging member 320 and a piston cylinder 321 . Intermediate shaft 318 is arranged parallel to rotor shaft 322 of motor 603 . The rotating body 319 is attached to the outer circumference of the intermediate shaft 318 . The swinging member 320 is attached to the outer peripheral portion of the rotating body 319 and swings back and forth as the rotating body 319 rotates. The piston cylinder 321 reciprocates in the front-rear direction as the swing member 320 swings.

A cylinder 323 is connected to the rear portion of the tool holder 313 . The tool holder 313 and cylinder 323 are rotatably supported by bearings held in the gear housing portion 2403 .

Striking element 316 moves linearly to strike the tip tool forward. The striking element 316 has a striker 324 as a striker and an impact bolt 325 arranged in front of the striker 324 . The striker 324 is arranged inside the piston cylinder 321 . The striker 324 is movable in the front-rear direction. An air chamber 326 that functions as an air spring is provided behind the striker 324 .

When the motor 603 is driven and the piston cylinder 321 moves forward, the pressure in the air chamber 326 increases. The striker 324 is pushed forward to collide with the impact bolt 325 and transmit kinetic energy to the tip tool. As a result, the tip tool is linearly driven forward and strikes the object to be machined. As the piston cylinder 321 moves rearward, the pressure in the air chamber 326 drops. The striker 324 moves rearward. The tip tool is pushed back by the object to be machined. The motion conversion mechanism 315 and the striking element 316 perform hammering action by repeating the above-described actions.

A rotation transmission mechanism 317 transmits the rotational force of the rotor shaft 322 to the tool holder 313 . The rotation transmission mechanism 317 is a gear reduction mechanism including a gear 327 provided on the front end of the rotor shaft 322 and a gear 328 provided on the outer circumference of the cylinder 323 and meshing with the gear 327 . When the motor 603 is driven, the cylinder 323 and the tool holder 313 connected to the cylinder 323 are integrally rotated via the rotation transmission mechanism 317 . As a result, the tip tool held by the tool holder 313 rotates. The rotation transmission mechanism 317 performs the drill operation by the operation described above.

The motor housing portion 2103 houses the motor 603 . The motor housing portion 2103 is connected to the rear portion of the gear housing portion 2403 .

The grip portion 2203 is gripped by the operator. The grip portion 2203 is arranged to extend downward from the rear portion of the motor housing portion 2103 . Trigger switch 1403 is provided on grip portion 2203 .

The controller housing section 2303 houses the controller 1303 . The controller housing portion 2303 is arranged below the grip portion 2203 . The battery mounting portion 503 is arranged below the controller housing portion 2303 .

A label area 73 is defined on a portion of the outer surface of the motor housing portion 2103 . A label area 73 is defined on the right side of the motor housing portion 2103 . A plurality of recesses 83 are provided in the label area 73 . A label 93 is attached to the label area 73 so as to cover the recess 83 .

As shown in FIG. 24 , the motor housing portion 2103 has a convex portion 103 protruding from the inner surface of the motor housing portion 2103 . The convex portion 103 protrudes leftward from the right portion of the inner surface of the motor accommodating portion 2103 . The concave portion 83 is provided on the outer surface of the thick portion of the motor housing portion 2103 including the convex portion 103 . The convex portion 103 is provided right behind the concave portion 83 . Protrusions 103 support stator core 2803 of motor 603 .

[Fourth embodiment]
A fourth embodiment will be described. Descriptions of components that are the same as or equivalent to those of the above-described embodiments will be simplified or omitted.

FIG. 27 is a perspective view showing a power tool 1D according to this embodiment. FIG. 28 is a vertical cross-sectional view showing a power tool 1D according to this embodiment. FIG. 29 is a cross-sectional view showing a power tool 1D according to this embodiment. FIG. 29 corresponds to a cross-sectional view taken along line DD of FIG. FIG. 30 is a perspective view showing the label area 74 and the label 94 according to this embodiment. FIG. 31 is a perspective view showing the vicinity of the label area 74 according to this embodiment.

In this embodiment, the power tool 1D is a hedge trimmer. The power tool 1D includes a housing 204, a battery mounting portion 504, a motor 604, a conversion mechanism 330, a guide bar 331, a first blade 332, a second blade 333, a controller 1304, a trigger switch 1404, An unlock lever 334 is provided.

The housing 204 has a motor housing portion 2104 , a grip portion 2204 and a controller housing portion 2304 . The motor housing portion 2104 houses the motor 604 . The grip portion 2204 is connected to each of the motor housing portion 2104 and the controller housing portion 2304 . A front grip portion 335 is arranged in front of the motor housing portion 2104 . Controller 1304 houses controller 1304 . The battery mounting portion 504 is arranged below the grip portion 2204 . Trigger switch 1404 and unlock lever 334 are each located on grip portion 2204 . The unlock lever 334 blocks operation of the trigger switch 1404 . Operation of the trigger switch 1404 is permitted by operating the unlock lever 334 .

A guide bar 331 is fixed to the front of the housing 204 . A guide bar 331 supports a first blade 332 and a second blade 333 .

The conversion mechanism 330 has a crank cam 336 , a first connecting rod 337 and a second connecting rod 338 . Crank cam 336 rotates as rotor shaft 339 of motor 604 rotates. Each of the first connecting rod 337 and the second connecting rod 338 is connected to the crank cam 336 . A first connecting rod 337 is connected to the first blade 332 . A second connecting rod 338 is connected to the second blade 333 . The first connecting rod 337 converts the rotational motion of the crank cam 336 into reciprocating motion of the first blade 332 in the longitudinal direction. The second connecting rod 338 converts the rotational motion of the crank cam 336 into reciprocating motion of the second blade 333 in the longitudinal direction.

The first blade 332 and the second blade 333 vertically overlap the guide bar 331 . The first blade 332 and the second blade 333 overlap vertically.

When the trigger switch 1404 is operated, the motor 604 is driven to reciprocate the first blade 332 and the second blade 333 in opposite phases. As a result, the cutting edge of the first blade 332 and the cutting edge of the second blade 333 repeatedly intersect to cut the object to be cut. As an object to be cut, branches and leaves of a hedge are exemplified.

A label area 74 is defined on a portion of the outer surface of motor housing 2104 . A label area 74 is defined on the right side of the motor housing portion 2104 . A plurality of recesses 84 are provided in the label area 74 . A label 94 is applied to the label area 74 . A label 94 is applied to the label area 74 so as to cover the recess 84 .

As shown in FIG. 29, the motor housing portion 2104 has a protrusion 104 protruding from the inner surface of the motor housing portion 2104 . The convex portion 104 protrudes leftward from the right portion of the inner surface of the motor accommodating portion 2104 . The concave portion 84 is provided on the outer surface of the thick portion of the motor housing portion 2104 including the convex portion 104 . The convex portion 104 is provided right behind the concave portion 84 . The convex portion 104 supports the electronic component 340 housed in the motor housing portion 2104 . A capacitor is exemplified as the electronic component 340 .

[Fifth embodiment]
A fifth embodiment will be described. Descriptions of components that are the same as or equivalent to those of the above-described embodiments will be simplified or omitted.

FIG. 32 is a perspective view showing a power tool 1E according to this embodiment. FIG. 33 is a cross-sectional view showing a power tool 1E according to this embodiment. FIG. 33 corresponds to a cross-sectional view taken along line EE of FIG. FIG. 34 is a perspective view showing the label area 75 and the label 95 according to this embodiment. FIG. 35 is a perspective view showing the vicinity of the label area 75 according to this embodiment.

In this embodiment, the power tool 1E is a cutter. The power tool 1E includes a housing 205, a battery mounting portion 505, a motor 606, a controller 1305, and a trigger switch 1405.

The housing 205 has a motor housing portion 2105 , a grip portion 2205 and a controller housing portion 2305 . The motor housing portion 2105 houses the motor 605 . The grip portion 2205 is arranged above the motor housing portion 2105 and the controller housing portion 2303 . The controller housing section 2305 houses the controller 1305 . Controller 1305 controls motor 605 . The battery mounting portion 505 is arranged at the rear portion of the grip portion 2205 . Trigger switch 1405 is located on grip portion 2205 .

The power tool 1</b>E also includes a base 341 that contacts the upper surface of the object to be cut, a front tilt support portion 342 and a rear tilt support portion 343 that connect the housing 205 and the base 341 , and a fixed cover 344 that is fixed to the housing 205 . and a rotating blade 345 that rotates inside the fixed cover 344 . By driving the motor 605, the rotary blade 345 is rotated.

A label area 75 is defined on a portion of the outer surface of the controller housing portion 2305 . A label area 75 is defined on the top surface of the controller housing portion 2305 . A plurality of recesses 85 are provided in the label area 75 . A label 95 is applied to the label area 75 . A label 95 is attached to the label area 75 so as to cover the recess 85 .

As shown in FIG. 33 , the controller housing portion 2305 has a convex portion 105 protruding from the inner surface of the controller housing portion 2305 . The convex portion 105 protrudes downward from the upper portion of the inner surface of the controller accommodating portion 2305 . The concave portion 85 is provided on the outer surface of the thick portion of the controller housing portion 2305 including the convex portion 105 . The convex portion 105 is provided right behind the concave portion 85 . The convex portion 105 supports the controller 1305 housed in the controller housing portion 2305 .

In this embodiment, the controller 1305 is stably supported by the convex portion 105 . The label 95 is affixed to the outer surface of the controller housing portion 2305 in a state in which distortion is reduced. The operator can visually recognize the label 95 with reduced distortion.

[Sixth embodiment]
A sixth embodiment will be described. Descriptions of components that are the same as or equivalent to those of the above-described embodiments will be simplified or omitted.

FIG. 36 is a perspective view showing a power tool 1F according to this embodiment. FIG. 37 is a cross-sectional view showing the power tool 1F according to this embodiment. FIG. 37 corresponds to a cross-sectional view taken along line FF of FIG. FIG. 38 is a perspective view showing the label area 76 and the label 96 according to this embodiment. FIG. 39 is a perspective view showing the vicinity of the label area 76 according to this embodiment.

In this embodiment, the power tool 1F is a circular saw. The power tool 1F includes a housing 206, a battery mounting portion 506, a motor 606, a controller 1306, and a trigger switch 1406.

Housing 206 has a motor housing portion 2106 , a grip portion 2206 and a controller housing portion 2306 . The motor housing portion 2106 houses the motor 606 . The grip portion 2206 is arranged above the motor housing portion 2106 and the controller housing portion 2306 . The controller housing section 2306 houses the controller 1306 . Controller 1306 controls motor 606 . The battery mounting portion 506 is arranged at the rear portion of the grip portion 2206 . Trigger switch 1406 is located on grip portion 2206 .

The electric power tool 1F also includes a base 346 that contacts the upper surface of the object to be cut, a front side support portion 347 and a rear side support portion 348 that connect the housing 206 and the base 346, a fixed cover 349 that is fixed to the housing 206, and a rotating blade 350 that rotates inside the fixed cover 349 . By driving the motor 606, the rotary blade 350 is rotated.

A label area 76 is defined on a portion of the outer surface of motor housing 2106 . A label area 76 is defined on the front of the motor housing 2106 . A plurality of recesses 86 are provided in the label area 76 . A label 96 is applied to the label area 76 . A label 96 is attached to the label area 75 so as to cover the recess 86 .

As shown in FIG. 37 , the motor housing portion 2106 has a convex portion 106 protruding from the inner surface of the motor housing portion 2106 . The concave portion 86 is provided on the outer surface of the thick portion of the motor housing portion 2106 including the convex portion 106 . The convex portion 106 is provided directly behind the concave portion 86 . The convex portion 106 supports the motor 606 housed in the motor housing portion 2106 . Protrusions 106 support stator core 2806 of motor 606 .

[Seventh Embodiment]
A seventh embodiment will be described. Descriptions of components that are the same as or equivalent to those of the above-described embodiments will be simplified or omitted.

FIG. 40 is a perspective view showing a power tool 1G according to this embodiment. FIG. 41 is a cross-sectional view showing a power tool 1F according to this embodiment. FIG. 41 corresponds to a cross-sectional view taken along line GG of FIG. FIG. 42 is a perspective view showing the label area 77 and the label 97 according to this embodiment. FIG. 43 is a perspective view showing the vicinity of the label area 77 according to this embodiment.

In this embodiment, the power tool 1G is a lawn mower. The power tool 1G includes a main pipe 351, a motor housing portion 2107, a grip portion 2207, a controller housing portion 2307, a cover 352, a front grip portion 353, a battery mounting portion 507, a motor 607, and a controller 1307. , and a trigger switch 1407 .

The motor housing portion 2107 is connected to the front end portion of the main pipe 351 . The controller housing portion 2307 is connected to the rear end portion of the main pipe 351 . The grip portion 2207 is connected to the rear portion of the controller housing portion 2307 . The front grip portion 353 is provided on the front portion of the controller housing portion 2307 .

The motor housing portion 2107 houses the motor 607 . Each of the grip portion 2207 and the front grip portion 353 is gripped by the operator. The controller housing section 2307 houses the controller 1307 . The battery mounting portion 507 is arranged below the controller housing portion 2307 . Trigger switch 1407 is arranged on grip portion 2207 .

The cover 352 is arranged at least partially around the cutting blade (not shown). The cutting blade is rotated by driving the motor 607 .

A label area 77 is defined on a portion of the outer surface of the motor housing portion 2107 . A label area 77 is defined on the right side of the motor housing portion 2107 . A plurality of recesses 87 are provided in the label area 77 . A label 97 is affixed to the label area 77 . A label 97 is attached to the label area 77 so as to cover the recess 87 .

The motor housing portion 2107 has a convex portion 107 protruding from the inner surface of the motor housing portion 2107 . The concave portion 87 is provided on the outer surface of the thick portion of the motor housing portion 2107 including the convex portion 107 . The convex portion 107 is provided right behind the concave portion 87 . The convex portion 107 supports the motor 607 housed in the motor housing portion 2107 . Protrusions 107 support stator core 2807 of motor 607 .

[Eighth Embodiment]
An eighth embodiment will be described. Descriptions of components that are the same as or equivalent to those of the above-described embodiments will be simplified or omitted.

FIG. 44 is a perspective view showing a power tool 1H according to this embodiment. FIG. 45 is a longitudinal sectional view showing the power tool 1H according to this embodiment. FIG. 46 is a cross-sectional view showing a power tool 1H according to this embodiment. FIG. 46 corresponds to a cross-sectional view taken along line HH in FIG. FIG. 47 is a perspective view showing the label area 78 and the label 98 according to this embodiment. FIG. 48 is a perspective view showing the vicinity of the label area 78 according to this embodiment.

In this embodiment, the power tool 1H is a hammer drill. The power tool 1H includes a housing 208, a case 408, a battery mounting portion 508, a motor 608, a controller 1308, and a trigger switch 1408.

Housing 208 includes a motor housing portion 2108 , a grip portion 2208 and a controller housing portion 2308 .

The motor housing portion 2108 houses the motor 608 . The grip portion 2208 is arranged behind the motor accommodating portion 2108 . The controller housing section 2308 houses the controller 1308 . The controller housing portion 2308 is arranged behind the grip portion 2208 . Trigger switch 1408 is located in motor housing 2108 . The battery mounting portion 508 is arranged in the rear portion of the controller housing portion 2308 . Case 408 houses a power transmission mechanism including a plurality of gears.

The power tool 1H also includes a bearing box 354 attached to the lower portion of the case 408, a cutting tool 355 arranged below the bearing box 354, and a wheel cover 356 arranged partly around the cutting tool 355. have. A bearing that supports the output shaft is arranged inside the bearing box 354 .

When the motor 608 is driven, the power of the motor 608 is transmitted to the cutting tool 355 through the power transmission mechanism housed in the case 408 and the output shaft inside the bearing box 354 . The cutting target is cut by rotating the cutting tool 355 .

A label area 78 is defined on a portion of the outer surface of motor housing 2108 . A label area 78 is defined on the right side of motor housing 2108 . A plurality of recesses 88 are provided in the label area 78 . A label 98 is applied to the label area 78 so as to cover the recess 88 .

As shown in FIG. 46 , the motor housing portion 2108 has a convex portion 108 protruding from the inner surface of the motor housing portion 2108 . The convex portion 108 protrudes leftward from the right portion of the inner surface of the motor accommodating portion 2108 . The concave portion 88 is provided on the outer surface of the thick portion of the motor housing portion 2108 including the convex portion 108 . The convex portion 108 is provided directly behind the concave portion 88 . Protrusions 108 support stator core 2808 of motor 608 .

[Other embodiments]
In the above-described embodiments, the power source of the power tool may not be the battery pack 25, but may be a commercial power source (AC power source).

1A...Electric tool, 1B...Electric tool, 1C...Electric tool, 1D...Electric tool, 1E...Electric tool, 1F...Electric tool, 1G...Electric tool, 1H...Electric tool, 2...Housing, 2L...Left housing, 2R Right housing 2S Screw 3 Rear cover 4 Hammer case (case) 4A Hammer case cover 4B Bumper 4F Front part 4R Rear part 5 Battery mounting part 6 Motor 7 ... reduction mechanism (power transmission mechanism), 8 ... spindle (power transmission mechanism), 8A ... peripheral wall portion, 8B ... supply port, 8C ... inner space, 9 ... impact mechanism (power transmission mechanism, power conversion mechanism), 10 ... anvil (Output Part) 10A... Anvil Body 10B... Anvil Projection Part 11... Chuck Sleeve 12... Fan 13... Controller 14... Trigger Switch 14A... Trigger Member 14B... Switch Body 15... Forward/Reverse Switching Lever 16 Operation panel 17 Mode switch 18 Light 18L First light 18R Second light 19 Intake port 20 Exhaust port 21 Motor housing portion 22 Grip portion 23 Controller accommodating portion 24 Bearing box (case) 24A Recessed portion 24B Recessed portion 25 Battery pack 26 Stator 27 Rotor 28 Stator core 29 Front insulator 29S Screw 30 Rear Insulator 31 Coil 32 Core portion 33 Shaft portion 33F Front shaft portion 33R Rear shaft portion 34 Rotor magnet 35 Sensor magnet 37 Sensor substrate 37S Rotation detecting element , 38 Fusing terminal 39 Rotor bearing 39F Front rotor bearing 39R Rear rotor bearing 40 Thin portion 41 Pinion gear 42 Planetary gear 42P Pin 43 Internal gear 44 Flange portion 45 Rod portion 46 Spindle bearing 47 Hammer 47A Hammer body 47B Hammer protrusion 48 Ball 49 Coil spring 50 Spindle groove 51 Hammer groove 53 Recess , 54... Washer 55... Insertion hole 56... Anvil bearing 57... Hole 58... Hole 60... Thick portion 60A... Thin portion 60B... Thick portion 61... Bush 63... Opening 64... Striking power switch 65 Dedicated switch 67 First part 68 Second part 71 Label area 72 Label area 73 Label area 74 Label area 75 Label area a, 76... label area, 77... label area, 78... label area, 81... recessed part, 81A... recessed part, 81B... recessed part, 81C... recessed part, 81D... recessed part, 81D1... recessed part, 81D2... recessed part, 81D3... recessed part, 81D4 ... concave portion 81D5 ... concave portion 81E ... concave portion 82 ... concave portion 83 ... concave portion 84 ... concave portion 85 ... concave portion 86 ... concave portion 87 ... concave portion 88 ... concave portion 91 ... label 91A ... bonding surface 91B ... Printing surface 92 Label 93 Label 94 Label 95 Label 96 Label 97 Label 98 Label 101 Convex portion 101A Convex portion 101B Convex portion 101C Convex portion , 101D... convex part, 101E... convex part, 102... convex part, 103... convex part, 104... convex part, 105... convex part, 106... convex part, 107... convex part, 108... convex part, 202... housing, 203...Housing, 204...Housing, 205...Housing, 206...Housing, 208...Housing, 300...Rotor shaft, 301...Tool holder, 302...Cylinder, 303...Crankshaft, 304...Gear, 305...Piston, 306...Connecting Rod 307 Air chamber 308 Striker 309 Impact bolt 310 Sensor part 311 Rotation speed adjustment dial 312 Power transmission mechanism 313 Tool holder 314 Barrel part 315 Motion conversion mechanism 316... Impact element 317... Rotation transmission mechanism 318... Intermediate shaft 319... Rotating body 320... Piston cylinder 322... Rotor shaft 323... Cylinder 324... Striker 325... Impact bolt 326 air chamber 327 gear 328 gear 329 auxiliary handle 330 conversion mechanism 331 guide bar 332 first blade 333 second blade 334 unlock lever 335 front grip Part 336... Crank cam 337... First connecting rod 338... Second connecting rod 339... Rotor shaft 340... Electronic component 341... Base 342... Front tilt support part 343... Rear tilt support part 344... Fixed cover 345... Rotary blade 346... Base 347... Front side support part 348... Rear side support part 349... Fixed cover 350... Rotary blade 351... Main pipe 352... Cover 353... Front grip Part, 354... Bearing box, 355... Cutting tool, 356... Wheel cover, 402... Case , 403... Case, 408... Case, 502... Battery attachment part, 503... Battery attachment part, 504... Battery attachment part, 505... Battery attachment part, 506... Battery attachment part, 507... Battery attachment part, 508... Battery attachment part , 602... Motor, 603... Motor, 604... Motor, 605... Motor, 606... Motor, 607... Motor, 608... Motor, 902... Impact mechanism, 1102... Chuck sleeve, 1302... Controller, 1303... Controller, 1304... Controller , 1305... Controller, 1306... Controller, 1307... Controller, 1308... Controller, 1402... Trigger switch, 1403... Trigger switch, 1404... Trigger switch, 1405... Trigger switch, 1406... Trigger switch, 1407... Trigger switch, 1408... Trigger Switch 2102 Motor housing portion 2103 Motor housing portion 2104 Motor housing portion 2105 Motor housing portion 2106 Motor housing portion 2107 Motor housing portion 2108 Motor housing portion 2202 Grip portion 2203 ... grip part 2204... grip part 2205... grip part 2206... grip part 2207... grip part 2208... grip part 2302... controller accommodating part 2303... controller accommodating part 2304... controller accommodating part 2305... controller Housing portion 2306 Controller housing portion 2307 Controller housing portion 2308 Controller housing portion 2402 Body housing portion 2403 Gear housing portion 2803 Stator core 2806 Stator core 2807 Stator core 2808 Stator core A1 ... area, A2 ... area, Aa ... area, Ab ... area, AX ... rotation axis, D ... depth, D1 ... depth, D2 ... depth, Da ... depth, Db ... depth, T1 ... thickness, T2...thickness, Ta...thickness, Tb...thickness, R...diameter, G...spacing.

Claims (20)

a motor;
an output driven by the motor;
a synthetic resin housing including a motor accommodating portion that accommodates the motor;
a recess provided in a label area defined in a portion of the outer surface of the housing;
a label affixed to the label area;
Electric tool. A plurality of the recesses are provided at intervals in the label area,
The power tool according to claim 1. the housing includes a thin portion and a thick portion that is thicker than the thin portion;
the label area is defined to include an outer surface of the thin portion and an outer surface of the thick portion;
The power tool according to claim 1 or 2. The recess is provided on the outer surface of the thick portion,
The power tool according to claim 3. The recess is formed on each of the outer surface of the thin-walled portion and the outer surface of the thick-walled portion,
the number of recesses formed on the outer surface of the thick portion is greater than the number of recesses formed on the outer surface of the thin portion;
The power tool according to claim 3. The recess is formed on each of the outer surface of the thin-walled portion and the outer surface of the thick-walled portion,
the depth of the recess formed in the outer surface of the thick portion is greater than the depth of the recess formed in the outer surface of the thin portion;
The power tool according to claim 3. The recess is formed on each of the outer surface of the thin-walled portion and the outer surface of the thick-walled portion,
The area of the opening of the recess formed on the outer surface of the thick portion is larger than the area of the opening of the recess formed on the outer surface of the thin portion.
The power tool according to claim 3. The housing has a convex portion protruding from the inner surface of the housing,
The convex portion includes a first portion and a second portion protruding from the first portion,
The thin portion includes the first portion,
The thick portion includes the second portion,
The power tool according to any one of claims 3 to 7. The housing has a convex portion protruding from the inner surface of the housing,
The thick portion includes the convex portion,
The power tool according to any one of claims 3 to 7. The convex portion is provided to extend in the first direction,
A plurality of the recesses are provided at intervals in the first direction,
The power tool according to claim 8 or 9. A plurality of the convex portions are provided in a second direction orthogonal to the first direction,
A plurality of the recesses are provided at intervals in the second direction,
The power tool according to claim 10. The convex portion supports an internal member housed in the housing,
A power tool according to any one of claims 8 to 11. wherein the internal member includes the motor;
The power tool according to claim 12. the internal member includes a controller that controls the motor;
The power tool according to claim 12. The internal member includes a metal case that houses a power transmission mechanism,
The power tool according to claim 12. wherein the label area is defined on an outer surface of the motor housing;
The power tool according to any one of claims 1 to 7. The motor housing portion has a convex portion protruding from the inner surface of the motor housing portion,
The convex portion supports the motor,
17. The power tool of claim 16. A controller that controls the motor,
the housing includes a controller accommodating portion that accommodates the controller;
The label area is defined on the outer surface of the controller housing,
The power tool according to any one of claims 1 to 7. The controller accommodating portion has a convex portion protruding from an inner surface of the controller accommodating portion,
The convex portion supports the controller,
19. The power tool of claim 18. is an impact driver, hammer drill, hedge trimmer, cutter, circular saw, mower, or grinder;
A power tool according to any one of claims 1 to 19.

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