CN118106926A

CN118106926A - Impact tool

Info

Publication number: CN118106926A
Application number: CN202311562164.9A
Authority: CN
Inventors: 力石真; 山中功二; 塚本功儿
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2022-11-30
Filing date: 2023-11-22
Publication date: 2024-05-31

Abstract

The invention provides an impact tool capable of inhibiting: it is difficult for the operator to visually recognize the work object. The impact tool is provided with: a motor; a hammer rotated by a motor; an anvil that is struck in a rotational direction by a hammer; a hammer housing that houses a hammer; and a lamp that irradiates light toward a front end side of the anvil. A slot is provided in the hammer housing. The lamp is disposed in the slot.

Description

Impact tool

Technical Field

The technology disclosed in this specification relates to an impact tool.

Background

In the art to which impact tools relate, there are known: a lighting system for a power tool as disclosed in patent document 1. In patent document 1, an illumination system for a power tool includes: chip On Board (COB) LEDs (chip on board LIGHT EMITTING diodes) as the lamp unit.

Prior art literature

Patent literature

Patent document 1: U.S. patent application publication 2016/0354889 specification

Disclosure of Invention

The brightness of the light emitted from the COB lamp is high. If at least a part of the light emitted from the COB lamp enters the eyes of the operator, the operator may become blinded, and as a result, it may be difficult to visually recognize the work object. In addition, in the case where the impact tool is provided with the COB lamp, if an impact is applied to the COB lamp due to, for example, dropping of the impact tool, there is a possibility that the light emission performance of the COB lamp is lowered.

The purpose of the technology disclosed in this specification is to: the situation that an operator is difficult to visually recognize the operation object is suppressed. In addition, the technology disclosed in the present specification aims to: the lamp is protected, thereby suppressing a decrease in the light emission performance of the lamp.

The present specification discloses an impact tool. The impact tool may be provided with: a motor; a hammer rotated by a motor; an anvil that is struck in a rotational direction by a hammer; a hammer housing that houses a hammer; and a lamp that irradiates light toward a front end side of the anvil. A slot may be provided in the hammer housing. The lamp may be disposed in the slot. In addition, the light may be retained to the hammer housing. The hammer housing may have: a protrusion arranged at the outer peripheral side of the lamp.

Effects of the invention

According to the above configuration, it is possible to suppress: it is difficult for the operator to visually recognize the work object. In addition, in the above configuration, the lamp is protected, and thus, suppression can be achieved: the light emission performance of the lamp is reduced.

Drawings

Fig. 1 is a perspective view showing an impact tool according to an embodiment as seen from the front.

Fig. 2 is a side view showing an upper portion of the impact tool according to the embodiment.

Fig. 3 is a longitudinal sectional view showing an upper portion of the impact tool according to the embodiment.

Fig. 4 is a transverse cross-sectional view showing an upper portion of the impact tool according to the embodiment.

Fig. 5 is a cross-sectional view showing a part of a lamp unit according to the embodiment.

Fig. 6 is a cross-sectional view showing a part of a lamp unit according to the embodiment.

Fig. 7 is an exploded perspective view showing an upper part of the impact tool according to the embodiment as viewed from the front.

Fig. 8 is a perspective view showing a lamp unit according to the embodiment as viewed from the front.

Fig. 9 is a perspective view showing a lamp unit according to the embodiment as seen from the rear side.

Fig. 10 is an exploded perspective view showing an impact tool according to the embodiment as viewed from the front.

Fig. 11 is a view showing a lamp unit according to the embodiment as seen from the front.

Fig. 12 is a perspective view showing an upper portion of the impact tool according to the embodiment as viewed from the front.

Fig. 13 is a perspective view showing an upper portion of the impact tool according to the embodiment as viewed from the rear.

Fig. 14 is a side view showing an upper portion of the impact tool according to the embodiment.

Fig. 15 is a longitudinal sectional view showing a part of the impact tool according to the embodiment.

Fig. 16 is an enlarged longitudinal sectional view of a part of the impact tool according to the embodiment.

Fig. 17 is a transverse cross-sectional view showing an upper portion of the impact tool according to the embodiment.

Fig. 18 is a transverse cross-sectional view showing an upper portion of the impact tool according to the embodiment.

Fig. 19 is an exploded perspective view showing an upper part of the impact tool according to the embodiment as viewed from the front.

Fig. 20 is an exploded perspective view showing a damper and a lamp unit according to the embodiment as seen from the rear side.

Fig. 21 is an exploded view showing an upper part of the impact tool according to the embodiment as viewed from the front.

Fig. 22 is a longitudinal sectional view showing an enlarged part of the impact tool according to the modification.

Description of the reference numerals

1 … Impact tool; 1B … impact tool; 2 … housings; the upper end of 2A …;2B … front end portion; 2C … openings; 2H … threaded boss portion; 2L … left shell; 2R … right housing; 2S … screws; 3 … rear cover; 3S … screws; 4 … hammer housing; 4A … rear side barrel portion; 4B … front side barrel portion; 4C … ring portion; 4D … projections; 4E … slots; 4F … snap ring groove; 4H … screw boss portion; 4Ha … screw boss portion; 4Hb … threaded boss portion; 4J … opposing faces; 4K … convex; 4L … buffer slots; 4M … spring ring groove; 4N … convex; 5 … screws; 6 … motors; 7 … speed reduction mechanisms; 8 … spindle; 8a … flange portion; 8B … spindle shaft portion; 8C … ring portion; 8D … spindle grooves; 8E … convex portions; 8F … grease grooves; 9 … striking mechanisms; 10 … anvil (output); 10B … recess; 10C … anvil shaft portion; 10D … anvil projections; 11 … balls; 12 … fans; 12a … liner; 13 … battery mounting portions; 14 … trigger shift; 15 … forward and reverse rotation shift gear; 16 … snap rings; 17 … seal members; 18 … lamp units; 19 … air inlets; 20 … exhaust ports; 21 … motor housing parts; 21C … cover portion; the upper surface of 21D …; 22 … grip; 23 … battery holding parts; 24 … bearing housing; 25 … battery packs; 26 … stators; 27 … rotors; 28 … stator cores; 29 … front insulators; 29S … screws; 30 … post insulators; 31 … coils; 32 … rotor core; 33 … rotor shaft portions; 34 … rotor magnets; 35 … sensor magnets; 37 … sensor substrates; 38 … blow out the terminal; 39 … rotor bearings; 40 … rotor bearings; 41 … pinion gear; 42 … planetary gears; 42P … pin; 43 … inner gear; 44 … spindle bearings; 45 … washers; 46 … anvil bearings; 46a … outer sleeve; 46B … inner sleeve; 46C … flange portion; 47 … hammers; 47a … hammer slot; 47B … hammer projections; 47C … recess; 47D … body portion; 47E … rear outer cylinder; 47F … front outer cylinder; 47G … inner cylinder; 47H … ball grooves; 48 … balls; 49 … coil springs; 49A … 1 st coil spring; 49B … nd coil spring; 50 … on-board chip light emitting diodes (COB); a 51 … substrate; 51a … ring portion; 51B … support; 52 … LED chips (light emitting elements); 54 … banks (banks); 55 … phosphor; 57 … optical components; 57a … outer barrel portion; 57B … inner cylinder; 57C … light transmitting portions; 57D … male part; 57E … entrance face; 57F … exit face; 57G … inner peripheral side projections; 57H … stops; 57J … recess; 80 … cushioning components; 81 … bushing; 81a … cartridge; 81B … flange portion; 81C … recess; a 90 … buffer; 91 … cylinder parts; 92 … ring portion; 93 … convex portions; 94 … projections; 104 … hammer housing; 105 … slots; 116 … circlips; 146 … anvil bearings; 180 … leads; AX … axis of rotation.

Detailed Description

In 1 or more embodiments, the impact tool may include: a motor; a hammer rotated by a motor; an anvil that is struck in a rotational direction by a hammer; a hammer housing that houses a hammer; and a lamp that irradiates light toward a front end side of the anvil. A slot may be provided in the hammer housing. The lamp may be disposed in the slot.

In the above configuration, since the lamp is disposed in the groove, light emitted from the lamp toward the front side is irradiated to the work object, and light emitted from the lamp toward the outer peripheral side is blocked by the hammer case. Accordingly, suppression of: the light emitted from the lamp is incident on the eyes of the operator. Thus, it is possible to suppress: the operator is dazzled. Therefore, it is possible to suppress: it is difficult for the operator to visually recognize the work object.

In 1 or more embodiments, the slots may be provided as: recessed rearward from the front end of the hammer housing.

In the above configuration, the light emitted from the lamp toward the front side is irradiated with: a work object on the front side of the hammer housing.

In 1 or more embodiments, the slots may be provided as: surrounding the anvil.

In the above configuration, the grooves are provided in a ring shape.

In1 or more embodiments, the impact tool may include an optical member having: a light transmission part arranged at a position more forward than the lamp. At least a portion of the optical component may be disposed in the slot.

In the above configuration, the light emitted from the lamp toward the front side is irradiated to the work object on the front side of the hammer case via the light transmitting portion of the optical member. Since the optical member is disposed in the groove, light emitted from the optical member toward the front side is irradiated to the work object, and light emitted from the optical member toward the outer peripheral side is blocked by the hammer case.

In 1 or more embodiments, the light transmitting portion may be disposed in the groove.

In the above configuration, the light transmitting portion is disposed at the inner position of the groove, so that the light emitted from the optical member toward the front side is irradiated to the work object, and the light emitted from the optical member toward the outer peripheral side is blocked by the hammer case.

In 1 or more embodiments, the optical member may have: an outer tube portion disposed at an outer peripheral side of the lamp, and an inner tube portion disposed at an inner peripheral side of the lamp. The outer tube portion and the inner tube portion may be disposed in the groove, respectively.

In the above configuration, the optical member is configured to: surrounding the lamp.

In 1 or more embodiments, the impact tool may include: a motor; a hammer rotated by a motor; an anvil that is struck in a rotational direction by a hammer; a hammer housing that houses a hammer; and a lamp that irradiates light toward a front end side of the anvil. The light may be retained to the hammer housing. The hammer housing may have: a protrusion disposed at an outer peripheral side position of the lamp.

In the above configuration, for example, even if the impact tool falls down, the lamp is protected by the projection of the hammer case. Accordingly, suppression of: breakage of the lamp can be suppressed: the light emission performance of the lamp is reduced.

In 1 or more embodiments, the protruding portion may protrude forward more than the lamp.

In the above configuration, the lamp can be sufficiently protected by the protruding portion.

In 1 or more embodiments, the protrusion may be provided as: surrounding the anvil.

In the above configuration, the protruding portion is provided in a ring shape.

In 1 or more embodiments, the lamp may have: a substrate, and an LED chip mounted on the front surface of the substrate. The substrate may be provided with: surrounding the anvil.

In the above configuration, the ring-shaped lamp is provided to the impact tool.

In1 or more embodiments, the impact tool includes an optical member having: a light transmission part arranged at a position more forward than the lamp. The protrusion may be disposed at an outer peripheral side position of the optical member.

In the above configuration, the lamp and the optical member are protected by the protruding portions, respectively.

In 1 or more embodiments, the light-transmitting portion may have an emission surface disposed on: the same position as the front end surface of the protrusion or a position further to the rear than the front end surface of the protrusion.

In the above configuration, the optical member can be sufficiently protected by the protruding portion.

In 1 or more embodiments, the anvil may have: an anvil shaft portion disposed at an inner peripheral side of the optical member. The hammer housing may have: a front cylinder part arranged at the surrounding position of the anvil shaft part. The impact tool may be provided with: a snap ring disposed in a snap ring groove provided in the front cylinder portion. The snap ring may support the optical component from the front side.

In the above configuration, it is possible to suppress: the optical member and the lamp are separated from the hammer case toward the front. The clip ring functions as a drop-preventing member that prevents the optical member and the lamp from dropping forward.

In one embodiment of 1 or more embodiments, the optical member may have an inner peripheral convex portion disposed at an inner peripheral side position with respect to the light transmitting portion and disposed at a front side position with respect to the light emitting surface of the light transmitting portion. The retainer ring may support the inner peripheral side protruding portion.

In the above configuration, the optical component can be stably supported from the front side by the snap ring disposed in the snap ring groove.

In 1 or more embodiments, the optical member may have: a stop part for supporting the end part of the clamping ring.

In the above configuration, it is possible to suppress: and the clasp rotates relative to the hammer housing and the optical component. The stopper functions as a rotation stopping member that suppresses rotation of the snap ring.

In 1 or more embodiments, the impact tool may include: and a buffer member disposed between the rear surface of the lamp and the hammer housing.

In the above configuration, it is possible to alleviate: such as the impact applied to the lamp when the impact tool falls. Since the lamp is held by the buffer member and the retainer ring in the front-rear direction, it is possible to suppress: the relative position between the lamp and the hammer housing changes.

In 1 or more embodiments, the optical member may have: a convex portion disposed at a position lower than the light transmitting portion. The impact tool may be provided with: and a housing fixed to the rear of the hammer case and accommodating the motor. The housing may have: a cover part covering the convex part from the front side.

In the above configuration, the lead wire connected to the lamp is supported by the convex portion. The convex portion is protected by the cover portion. In addition, even if at least a part of the light emitted from the lamp enters the convex portion, the light emitted from the convex portion is blocked by the cover portion.

In 1 or more embodiments, the hammer housing may have: an opposing surface opposing the upper surface of the cover. The opposing face may be provided as: extending in the left-right direction.

In the above configuration, when the case is a so-called half-divided case composed of the left case and the right case, the left case and the right case can be smoothly fixed by the facing surfaces.

In 1 or more embodiments, the impact tool may include: and a housing which is fixed to the rear position of the hammer case by a screw and accommodates the motor. The hammer housing may have: a threaded boss portion coupled to the screw. At least a portion of the housing may be configured to: the threaded boss portion is covered.

In the above configuration, the screw boss portion of the hammer case is protected by the housing. In addition, inhibition can be achieved: the hand of the operator holding the holding portion of the housing is in direct contact with the hammer housing.

In 1 or more embodiments, the anvil may have: an anvil shaft portion disposed at an inner peripheral side of the optical member. The impact tool may be provided with: an anvil bearing which is held by the hammer housing and rotatably supports the anvil shaft. The front end portion of the hammer may be configured to: and a position further toward the front side than the rear end portion of the anvil bearing.

In the above configuration, since the hammer case overlaps the anvil bearing, it is possible to suppress: the size of the impact tool is increased. Can shorten: the length of the upper portion of the impact tool in the front-rear direction (so-called the overall length).

In 1 or more embodiments, the lamp may be a COB lamp.

In the above configuration, light with high brightness can be emitted from the lamp.

Hereinafter, embodiments will be described with reference to the drawings. In the embodiment, the positional relationship of each part will be described using terms such as front, rear, left, right, upper, and lower. The above expression means: relative position or orientation with respect to the center of the impact tool.

[ Embodiment 1]

Embodiment 1 will be described.

< Impact tool >

Fig. 1 is a perspective view showing an impact tool 1 according to the embodiment as seen from the front. Fig. 2 is a side view showing an upper portion of the impact tool 1 according to the embodiment. Fig. 3 is a longitudinal sectional view showing an upper portion of the impact tool 1 according to the embodiment. Fig. 4 is a transverse cross-sectional view showing an upper portion of the impact tool 1 according to the embodiment.

In the embodiment, the impact tool 1 is: an electric tool having an electric motor 6 as a power source. In the embodiment, the direction parallel to the rotation axis AX of the motor 6 is appropriately referred to as: the axial direction, the direction around the circumference of the rotation axis AX, is appropriately referred to as: the radial direction of the rotation axis AX is appropriately referred to as the circumferential direction or rotation direction: radial direction. In the radial direction, the position closer to the rotation axis AX or the direction closer to the rotation axis AX is appropriately referred to as: the radially inner side or the inner peripheral side, a position farther from the rotation axis AX or a direction away from the rotation axis AX is appropriately referred to as: radially outer or peripheral side. In the embodiment, the rotation axis AX extends in the front-rear direction. One axial side is the front side (front), and the other axial side is the rear side (rear).

In an embodiment, the impact tool 1 is an impact wrench. The impact tool 1 includes: the housing 2, the rear cover 3, the hammer case 4, the screw 5, the motor 6, the reduction mechanism 7, the spindle 8, the striking mechanism 9, the anvil 10, the fan 12, the battery mounting portion 13, the trigger shift 14, the forward and reverse shift 15, the snap ring 16, the seal member 17, and the lamp unit 18.

The housing 2 is made of synthetic resin. In an embodiment, the housing 2 is made of nylon. The housing 2 includes: a left housing 2L, and a right housing 2R disposed at a right position of the left housing 2L. The left case 2L and the right case 2R are fixed by a plurality of screws 2S. The housing 2 is constituted by a pair of half-divided housings.

The housing 2 has: a motor housing portion 21, a grip portion 22, and a battery holding portion 23.

The motor housing portion 21 has a cylindrical shape. The motor housing 21 houses the motor 6, a part of the bearing housing 24, and the rear portion of the hammer case 4. The motor housing portion 21 is provided with a screw boss portion 2H.

The grip 22 protrudes downward from the motor housing 21. The trigger gear 14 is provided to: an upper portion of the grip 22. The grip 22 is gripped by the operator.

The battery holding portion 23 is connected to the lower end portion of the grip portion 22. The external dimensions of the battery holding portion 23 are larger than the external dimensions of the grip portion 22 in the front-rear direction and the left-right direction, respectively.

The rear cover 3 is made of synthetic resin. The rear cover 3 is disposed: the rear position of the motor housing portion 21. The rear cover 3 accommodates at least a part of the fan 12. The fan 12 is configured to: the inner peripheral side position of the rear cover 3. The rear cover 3 is configured to: the opening of the rear end portion of the motor housing portion 21 is covered. The rear cover 3 is fixed to the rear end portion of the motor housing portion 21 by a screw 3S.

The motor housing portion 21 has an air inlet 19. The 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 air inlet 19. The air in the inner space of the housing 2 flows out to the outer space of the housing 2 through the exhaust port 20.

The hammer case 4 functions as a gear case for housing the reduction mechanism 7. The hammer case 4 houses the reduction mechanism 7. The hammer housing 4 accommodates the spindle 8. The hammer housing 4 houses the striking mechanism 9. The hammer housing 4 accommodates a part of the anvil 10. The hammer housing 4 is made of metal. In an embodiment, the hammer housing 4 is made of aluminum. The hammer housing 4 is cylindrical.

The hammer housing 4 includes: a rear tubular portion 4A, a front tubular portion 4B, an annular portion 4C, and a screw boss portion 4H. The front side tube portion 4B is disposed: and is located further forward than the rear side tube portion 4A. The rear cylinder portion 4A has an outer diameter larger than that of the front cylinder portion 4B. The inner diameter of the rear cylinder portion 4A is larger than the inner diameter of the front cylinder portion 4B. The annular portion 4C is configured to: the front end of the rear cylinder 4A is connected to the rear end of the front cylinder 4B.

The hammer housing 4 is connected to the front of the motor housing 21. The motor housing 21 is fixed to the rear of the hammer case 4 by a screw 5. The screw 5 is inserted into an opening provided in the screw boss portion 2H from the rear of the screw boss portion 2H, and then inserted into a screw hole provided in the screw boss portion 4H. The number of screw boss portions 2H and 4H is 4 in the circumferential direction. The screws 5 are provided with 4 in the circumferential direction. As shown in fig. 2, the screw 2S overlaps with the screw 5 in the front-rear direction and the up-down direction. Therefore, the screw 2S cannot be detached before the screw 5 is detached. After the screw 5 is detached, the screw 2S can be detached. After the left housing 2L and the right housing 2R are fixed by the screws 2S, the hammer case 4 and the motor housing 21 are fixed by the screws 5.

A bearing housing 24 is fixed to the rear portion of the rear cylinder portion 4A. At least a part of the speed reducing mechanism 7 is disposed in: the bearing housing 24 is located at an inboard position. The hammer case 4 is sandwiched by the left casing 2L and the right casing 2R. A part of the bearing housing 24 and the rear part of the rear cylinder 4A are accommodated in the motor accommodating portion 21. The bearing housings 24 are fixed to the motor housing 21 and the hammer case 4, respectively.

The motor 6 is: the power source of the impact tool 1. The motor 6 generates a rotational force. The motor 6 is an electric motor. The motor 6 is: an inner rotor type brushless motor. The motor 6 includes: a stator 26 and a rotor 27. The stator 26 is supported by the motor housing 21. At least a portion of the rotor 27 is configured to: the inside position of the stator 26. The rotor 27 rotates with respect to the stator 26. The rotor 27 rotates about a rotation axis AX extending in the front-rear direction.

The stator 26 has: stator core 28, front insulator 29, rear insulator 30, and coil 31.

The stator core 28 is disposed: is located radially outward of the rotor 27. The stator core 28 includes: a plurality of steel sheets laminated. The steel plate is as follows: a metal plate containing iron as a main component. The stator core 28 has a cylindrical shape. The stator core 28 includes: a plurality of teeth for supporting the coil 31.

The front insulator 29 is provided with: the front portion of the stator core 28. The rear insulator 30 is provided with: the rear portion of the stator core 28. The front insulator 29 and the rear insulator 30 are respectively: an electrical insulating member made of synthetic resin. The front insulator 29 is configured to: covering a portion of the surface of the tooth. The rear insulator 30 is configured to: covering a portion of the surface of the tooth.

The coil 31 is mounted on the stator core 28 via the front insulator 29 and the rear insulator 30. The coil 31 is provided in plurality. The coil 31 is disposed around the teeth of the stator core 28 via the front insulator 29 and the rear insulator 30. The coil 31 and the stator core 28 are electrically insulated by the front insulator 29 and the rear insulator 30. The plurality of coils 31 are connected by means of the fuse terminals 38.

The rotor 27 rotates about the rotation axis AX. The rotor 27 has: a rotor core 32, a rotor shaft 33, a rotor magnet 34, and a sensor magnet 35.

The rotor core 32 and the rotor shaft 33 are each made of steel. In the embodiment, the rotor core portion 32 is integrated with the rotor shaft portion 33. The front portion of the rotor shaft portion 33 protrudes forward from the front end surface of the rotor core portion 32. The rear portion of the rotor shaft portion 33 protrudes rearward from the rear end surface of the rotor core portion 32.

The rotor magnet 34 is fixed to the rotor core 32. The rotor magnet 34 has a cylindrical shape. The rotor magnet 34 is disposed: around the rotor core 32.

The sensor magnet 35 is fixed to the rotor core 32. The sensor magnet 35 is annular. The sensor magnet 35 is disposed: the front end surface of the rotor core 32 and the front end surface of the rotor magnet 34.

A sensor substrate 37 is mounted on the front insulator 29. The sensor substrate 37 is fixed to the front insulator 29 by screws 29S. The sensor substrate 37 includes: an annular circuit board and a magnetic sensor supported by the circuit board. At least a part of the sensor substrate 37 faces the sensor magnet 35. The magnetic sensor detects the position of the sensor magnet 35, thereby detecting the position of the rotor 27 in the rotation direction.

The rear portion of the rotor shaft 33 is rotatably supported by a rotor bearing 39. The front portion of the rotor bearing 39 is rotatably supported by the rotor bearing 40. The rotor bearing 39 is held by the rear cover 3. The rotor bearing 40 is held in the bearing housing 24. The front end portion of the rotor shaft portion 33 is disposed in the internal space of the hammer case 4 through the opening of the bearing housing 24.

A pinion gear 41 is formed at the front end portion of the rotor shaft portion 33. The pinion 41 is coupled to at least a part of the reduction mechanism 7. The rotor shaft 33 is coupled to the reduction mechanism 7 via a pinion 41.

The reduction mechanism 7 transmits the rotational force of the motor 6 to the main shaft 8 and the anvil 10. The speed reducing mechanism 7 is accommodated in: a rear barrel portion 4A of the hammer housing 4. The reduction mechanism 7 has a plurality of gears. The speed reducing mechanism 7 is disposed in: the motor 6 is located further forward. The speed reducing mechanism 7 connects the rotor shaft 33 and the main shaft 8. The gear of the reduction mechanism 7 is driven by the rotor 27. The reduction mechanism 7 transmits the rotation of the rotor 27 to the spindle 8. The speed reducing mechanism 7 rotates the main shaft 8 at a rotation speed lower than the rotation speed of the rotor shaft portion 33. The reduction mechanism 7 includes a planetary gear mechanism.

The speed reducing mechanism 7 includes: a plurality of planetary gears 42 disposed around the pinion gear 41; and an internal gear 43 disposed around the plurality of planetary gears 42. The pinion gear 41, the planetary gear 42, and the internal gear 43 are respectively accommodated in: the hammer housing 4 and the bearing housing 24. A plurality of planetary gears 42 are respectively meshed with the pinion gears 41. The planetary gear 42 is rotatably supported by the main shaft 8 via a pin 42P. The spindle 8 rotates via the planetary gear 42. The internal gear 43 has: internal teeth meshed with the planetary gears 42. The internal gear 43 is fixed to the bearing housing 24. The internal gear 43 cannot always rotate relative to the bearing housing 24.

When the rotor shaft 33 is rotated by the driving of the motor 6, the pinion 41 rotates, and the planetary gear 42 revolves around the pinion 41. The planetary gear 42 revolves while meshing with the internal teeth of the internal gear 43. The spindle 8 connected to the planetary gear 42 via the pin 42P is rotated at a rotation speed lower than that of the rotor shaft 33 by the revolution of the planetary gear 42.

The spindle 8 is rotated by the rotational force of the motor 6. The spindle 8 is disposed: and is positioned further forward than at least a portion of the motor 6. The spindle 8 is disposed: and is positioned further forward than the stator 26. At least a portion of the spindle 8 is configured to: and is positioned further forward than the rotor 27. At least a portion of the spindle 8 is configured to: the front position of the speed reducing mechanism 7. The spindle 8 is rotated by a rotor 27. The spindle 8 rotates by the rotational force of the rotor 27 transmitted from the reduction mechanism 7.

The spindle 8 has: a flange portion 8A, and a spindle shaft portion 8B protruding forward from the flange portion 8A. The planetary gear 42 is rotatably supported by the flange portion 8A via a pin 42P. The rotation axis of the spindle 8 coincides with the rotation axis AX of the motor 6. The spindle 8 rotates about the rotation axis AX.

The spindle 8 is rotatably supported by a spindle bearing 44. The spindle bearing 44 is held in the bearing housing 24. The spindle 8 has: and an annular portion 8C protruding rearward from the rear portion of the flange portion 8A. The spindle bearing 44 is configured to: the inner side of the annular portion 8C. In the embodiment, the outer ring of the main shaft bearing 44 is connected to the annular portion 8C, and the inner ring of the main shaft bearing 44 is supported by the bearing housing 24.

The striking mechanism 9 is driven by the motor 6. The rotational force of the motor 6 is transmitted to the striking mechanism 9 via the reduction mechanism 7 and the main shaft 8. The striking mechanism 9 strikes the anvil 10 in the rotation direction based on the rotation force of the main shaft 8 rotated by the motor 6. The striking mechanism 9 has: a hammer 47, balls 48, and a coil spring 49. The striking mechanism 9 including the hammer 47 is housed in the hammer case 4.

The hammer 47 is configured to: and is located further forward than the speed reducing mechanism 7. The hammer 47 is accommodated in the rear barrel 4A. The hammer 47 is configured to: around the spindle shaft 8B. The hammer 47 is held on the spindle shaft 8B. The balls 48 are arranged: a position between the spindle shaft 8B and the hammer 47. The coil springs 49 are supported by the flange portion 8A and the hammer 47, respectively.

The hammer 47 has: an annular main body portion 47D, a rear outer tube portion 47E protruding rearward from an outer peripheral portion of the main body portion 47D, a front outer tube portion 47F protruding forward from an outer peripheral portion of the main body portion 47D, an inner tube portion 47G protruding rearward from an inner peripheral portion of the main body portion 47D, a hammer groove 47A, and a hammer projection portion 47B. The main body 47D is disposed: around the spindle shaft 8B. The main body 47D is annular. The rear outer tube portion 47E and the inner tube portion 47G protrude rearward from the main body portion 47D. The recess 47C is defined by the rear surface of the main body 47D, the inner peripheral surface of the rear outer tube 47E, and the outer peripheral surface of the inner tube 47G. The concave portion 47C is provided as: recessed forward from the rear end of the hammer 47. The recess 47C is annular. The hammer projection 47B projects toward the front side from the main body 47D. The hammer projection 47B projects radially inward from the inner peripheral surface of the front outer tube 47F. The hammer projections 47B are provided in 2 numbers. Since the rear outer tube portion 47E and the front outer tube portion 47F are provided, the inertial force in the rotation direction of the hammer 47 increases.

The hammer 47 is rotated by the motor 6. The rotational force of the motor 6 is transmitted to the hammer 47 via the reduction mechanism 7 and the spindle 8. The hammer 47 is rotatable together with the spindle 8 based on the rotational force of the spindle 8 rotated by the motor 6. 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 hammer 47 rotates about the rotation axis AX.

The balls 48 are made of metal such as steel. The balls 48 are arranged: a position between the spindle shaft 8B and the hammer 47. The spindle 8 has: a spindle groove 8D for disposing at least a part of the ball 48. The spindle groove 8D is provided in: a part of the outer peripheral surface of the spindle shaft 8B. The hammer 47 has: a hammer groove 47A for disposing at least a portion of the ball 48. The hammer groove 47A is provided in: a part of the inner surface of the inner tube portion 47G. The balls 48 are arranged: a position between the spindle groove 8D and the hammer groove 47A. The balls 48 can roll inside the spindle groove 8D and inside the hammer groove 47A, respectively. The hammer 47 can move along with the ball 48. The spindle 8 and the hammer 47 are relatively movable in the axial direction and the rotational direction within a movable range defined by the spindle groove 8D and the hammer groove 47A, respectively.

The coil spring 49 generates: and an elastic force for moving the hammer 47 forward. In an embodiment, the coil spring 49 includes: a1 st coil spring 49A, and a 2 nd coil spring 49B arranged in parallel with the 1 st coil spring 49A. The coil spring 49 is disposed: a position between the flange portion 8A and the hammer 47. An annular recess 47C is provided on the rear surface of the hammer 47. The recess 47C is recessed from the rear surface of the hammer 47 toward the front. A gasket 45 is provided inside the recess 47C. The washer 45 is supported by the body 47D via the balls 11. The ball 11 is disposed: a ball groove 47H provided on the rear surface of the main body 47D. The rear end portion of the coil spring 49 is supported by the flange portion 8A. The distal end portion of the coil spring 49 is disposed at an inner position of the recess 47C and is supported by the washer 45.

The anvil 10 is: an output part of the impact tool 1 operated by the rotational force of the motor 6. The anvil 10 is rotated by the rotation of the motor 6. At least a portion of the anvil 10 is configured to: and is positioned further forward than the hammer 47.

The anvil 10 has: a rod-shaped anvil shaft portion 10C, and an anvil protrusion portion 10D. The anvil shaft portion 10C orthogonal to the rotation axis AX has a substantially quadrangular outer shape. A socket (socket) as a tip tool is fitted to the anvil shaft portion 10C. Further, a recess 10B is provided at the rear end portion of the anvil 10. A convex portion is provided at the front end portion of the spindle shaft portion 8B. The protruding portion 8E of the front end portion of the spindle shaft portion 8B is inserted into: a recess 10B provided at the rear end portion of the anvil 10. The anvil protrusion 10D is provided at the rear end portion of the anvil 10. The anvil protruding portion 10D protrudes radially outward from the rear end portion of the anvil shaft portion 10C. The convex portion 8E is provided with 2 grease grooves 8F.

Anvil 10 is rotatably supported by anvil bearing 46. 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 about the rotation axis AX. Anvil bearing 46 is configured to: the inner side position of the front side tube portion 4B. Anvil bearing 46 is held in: the front side barrel portion 4B of the hammer housing 4. The front side tube portion 4B is disposed: around the anvil shaft portion 10C. Anvil bearing 46 rotatably supports anvil shaft portion 10C. In an embodiment, anvil bearing 46 comprises: an outer sleeve 46A, and an inner sleeve 46B disposed at an inner circumferential side of the outer sleeve 46A.

The hammer protrusion 47B can be in contact with the anvil protrusion 10D. In a state where the hammer protrusion 47B is in contact with the anvil protrusion 10D, the anvil 10 is rotated together with the hammer 47 and the spindle 8 by driving the motor 6.

The anvil 10 is struck in the direction of rotation by a hammer 47. In, for example, a screw tightening operation, when the load acting on the anvil 10 becomes high, it sometimes occurs that: a situation in which the anvil 10 cannot be rotated by only the power generated by the motor 6. When the anvil 10 cannot be rotated by only the power generated by the motor 6, the rotation of the anvil 10 and the hammer 47 is stopped. The spindle 8 and the hammer 47 are relatively movable in the axial direction and the circumferential direction by means of balls 48, respectively. Even if the rotation of the hammer 47 is stopped, 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 rearward while being guided by the spindle groove 8D and the hammer groove 47A, respectively. The hammer 47 receives force from the ball 48, and moves rearward with the ball 48. That is, in a state where the rotation of the anvil 10 is stopped, the spindle 8 rotates, and the hammer 47 moves rearward. By the hammer 47 moving rearward, the contact between the hammer projection 47B and the anvil projection 10D is released.

The coil spring 49 generates: and an elastic force for moving the hammer 47 forward. The hammer 47 moved rearward is moved forward by the elastic force of the coil spring 49. When the hammer 47 moves forward, a force in the rotational direction is received from the ball 48. That is, the hammer 47 moves forward while rotating. When the hammer 47 moves forward while rotating, the hammer protrusion 47B contacts the anvil protrusion 10D while rotating. Accordingly, the anvil protruding portion 10D is struck in the rotational direction by the hammer protruding portion 47B. Acting on the anvil 10: both the power of the motor 6 and the inertial force of the hammer 47. Accordingly, the anvil 10 can rotate about the rotation axis AX with a high torque.

The fan 12 is rotated by the rotation of the motor 6. The fan 12 is configured to: and is positioned further rearward than the stator 26 of the motor 6. The fan 12 generates: for cooling the motor 6. The fan 12 is fixed to: at least a portion of the rotor 27. The fan 12 is fixed to the rear portion of the rotor shaft 33 via a bush 12A. The fan 12 is configured to: a position between the rotor bearing 39 and the stator 26. The fan 12 rotates by the rotation of the rotor 27. The rotation of the rotor shaft 33 causes the fan 12 to rotate together with the rotor shaft 33. The fan 12 rotates, so that air in the external space of the casing 2 flows into the internal space of the casing 2 through the air inlet 19. The air flowing into the inner space of the casing 2 circulates through the inner space of the casing 2 to cool the motor 6. The air flowing through the inner space of the casing 2 is rotated by the fan 12, and flows out to the outer space of the casing 2 through the exhaust port 20.

The battery mounting portion 13 is disposed: a lower portion of the battery holding portion 23. The battery pack 25 is mounted to the battery mounting portion 13. The battery pack 25 is detachable from the battery mounting portion 13. The battery pack 25 functions as a power source of the impact tool 1. The battery pack 25 includes a secondary battery. In an embodiment, the battery pack 25 includes: a rechargeable lithium ion battery. The battery pack 25 is mounted on the battery mounting portion 13, and thereby can supply power to the impact tool 1. The motor 6 and the lamp unit 18 are driven based on the electric power supplied from the battery pack 25.

The trigger shifter 14 is provided to the grip 22. The trigger shift 14 is operated by the operator to start the motor 6. By operating the trigger shift 14, the driving and stopping of the motor 6 are switched.

The forward/reverse rotation shift lever 15 is provided in: an upper portion of the grip 22. The forward/reverse shift lever 15 is operated by the operator. By operating the forward/reverse rotation switching dial 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. The rotation direction of the motor 6 is switched, whereby the rotation direction of the spindle 8 is switched.

< Lamp Unit >)

Fig. 5 and 6 are cross-sectional views each showing a part of the lamp unit 18 according to the embodiment. Fig. 5 is a sectional view of an upper portion of the lamp unit 18. Fig. 6 is a cross-sectional view of the lower portion of the lamp unit 18. Fig. 7 is an exploded perspective view showing an upper portion of the impact tool 1 according to the embodiment as viewed from the front. Fig. 8 is a perspective view showing the lamp unit 18 according to the embodiment as viewed from the front. Fig. 9 is a perspective view showing the lamp unit 18 according to the embodiment as viewed from the rear. Fig. 10 is an exploded perspective view showing the impact tool 1 according to the embodiment as viewed from the front. Fig. 11 is a view of the lamp unit 18 according to the embodiment from the front.

The lamp unit 18 emits illumination light. The lamp unit 18 illuminates the anvil 10 and the periphery of the anvil 10 with illumination light. The lamp unit 18 illuminates the front end side of the anvil 10 with illumination light.

The lamp unit 18 is configured to: the front of the hammer housing 4. The lamp unit 18 is configured to: around the front side tube portion 4B. The lamp unit 18 is disposed around the anvil shaft portion 10C via the front side tube portion 4B.

The lamp unit 18 includes a lamp 50. In an embodiment, the lamp 50 includes: chip on board light emitting diodes (COB LEDs). In the following description, the lamp 50 is appropriately referred to as: COB lamps 50. The COB lamp 50 irradiates light toward the front end side of the anvil 10.

The COB lamp 50 has: a substrate 51, an LED chip 52 as a light emitting element, a bank 54, and a phosphor 55. As the substrate 51, there can be exemplified: an aluminum substrate, a glass cloth substrate epoxy substrate (FR-4 substrate), or a composite substrate epoxy substrate (CEM-3 substrate). The LED chip 52 is mounted on: the surface of the substrate 51. The LED chip 52 and the substrate 51 are connected by metal wires (not shown). The metal wires interconnect the plurality of LED chips 52. The bank 54 is provided with: the surface of the substrate 51. The banks 54 are arranged: around the LED chip 52. The banks 54 are respectively arranged: is located radially inward and radially outward of the LED chip 52. The bank 54 defines: a partition space for disposing the fluorescent material 55. The phosphor 55 is disposed inside the bank 54 as follows: the LED chip 52 is covered. A pair of electrodes (not shown) are disposed on the surface (front surface) of the substrate 51 outside the banks 54. Furthermore, the electrode may be configured to: the back surface (rear surface) of the substrate 51. One electrode of the pair of electrodes is a positive electrode, and the other electrode is a negative electrode. The electric power output from the battery pack 25 is supplied to the electrodes. The power supplied to the electrodes is supplied to the LED chip 52 via the substrate 51 and the metal wires. The LED chip 52 emits light based on the electric power supplied from the battery pack 25. The voltage of the battery pack 25 is applied to the LED chip 52 in a state of being reduced to 5V by a controller (not shown). The controller is accommodated in the battery holding unit 23. The lamp unit 18 and the controller are connected by means of a lead 180.

The lamp unit 18 has: COB lamp 50 and optical member 57. The on-board chip light emitting diode 50 has: a substrate 51, a plurality of LED chips 52, banks 54, and a phosphor 55.

The substrate 51 has a ring shape. The base plate 51 is disposed around the anvil shaft portion 10C via the front side tube portion 4B. The substrate 51 has: the annular portion 51A, and a support portion 51B protruding downward from a lower portion of the annular portion 51A. The substrate 51 is provided with: surrounding the anvil shaft portion 10C.

The LED chip 52 is mounted on: the front surface of the annular portion 51A of the substrate 51. The LED chip 52 is disposed around at least a part of the anvil shaft portion 10C via the front side tube portion 4B. The LED chips 52 are arranged in plural at intervals in the circumferential direction of the annular portion 51A. In the embodiment, 24 LED chips 52 are arranged at equal intervals in the circumferential direction of the annular portion 51A.

The bank 54 is provided with: the front surface of the annular portion 51A of the substrate 51. The bank 54 protrudes forward from the front surface of the annular portion 51A. The bank 54 defines: a partition space for disposing the fluorescent material 55. The bank 54 has a circular shape. In an embodiment, the bank 54 is provided as: is in a double circular shape. That is, in the embodiment, the bank 54 includes: an annular 1 st bank 54 provided on the front surface of the annular portion 51A; and an annular 2 nd bank 54 provided on the front surface of the annular portion 51A at a position radially outward of the 1 st bank 54. The 1 st bank 54 is arranged in: is located radially inward of the LED chip 52. The 2 nd bank 54 is disposed: is located radially outward of the LED chip 52. The plurality of LED chips 52 are arranged in: a position between the 1 st bank 54 and the 2 nd bank 54.

The phosphor 55 is disposed: the front surface of the annular portion 51A of the substrate 51. The phosphor 55 has a circular ring shape. The phosphor 55 is configured to: the plurality of LED chips 52 are respectively covered between the 1 st bank 54 and the 2 nd bank 54.

A pair of leads, not shown, are connected to the substrate 51. The electrode is connected to a lead. A pair of leads are supported by: the rear surface of the support portion 51B. Further, the lead may be supported by: the front surface of the support portion 51B.

The current outputted from the battery pack 25 is supplied to the electrodes via (not shown) and the lead 180. The voltage of the battery pack 25 is reduced by a controller (not shown) and then applied to the electrodes. The current supplied to the electrode is supplied to the LED chip 52 via the substrate 51 and the metal wire. The LED chip 52 emits light based on the current supplied from the battery pack 25.

The optical member 57 is connected to the COB lamp 50. The optical member 57 is fixed to the substrate 51. The optical member 57 is made of polycarbonate resin. In the embodiment, the optical member 57 is made of a polycarbonate resin containing a white diffusion material. The optical member 57 is milky white. The optical member 57 has a light transmittance of 40% to 70%. Since the optical member 57 is milky white, it is difficult to visually recognize the outer shape of the LED chip 52 from the outside of the impact tool 1. Since the outer shape of the LED chip 52 is difficult to visually see, the appearance of the impact tool 1 is optimized.

At least a portion of the optical member 57 is configured to: and is positioned further forward than COB lamp 50. The optical member 57 has: an outer tube 57A, an inner tube 57B, a light transmitting portion 57C, a convex portion 57D, an inner peripheral side convex portion 57G, a stopper portion 57H, and a concave portion 57J.

The outer tube 57A is disposed: further radially outward than the inner tube 57B. The outer tube 57A is disposed: the COB lamp 50 is located at the outer peripheral side. The outer tube 57A is disposed: is located radially outward of the LED chip 52. In the radial direction, the COB lamp 50 is arranged: a position between the outer tube 57A and the inner tube 57B. The outer tube 57A is disposed: is located radially outward of the annular portion 51A of the base plate 51. The inner tube 57B is disposed: the COB lamp 50 is positioned at the inner peripheral side. The inner tube 57B is disposed: is located radially inward of the annular portion 51A of the base plate 51. The inner tube 57B is disposed: is located radially inward of the LED chip 52.

The light transmitting portion 57C is arranged: and is located further to the front side than the COB lamp 50. The light transmitting portion 57C is annular. The light transmitting portion 57C is arranged: and is positioned further forward than the LED chip 52. The light transmitting portion 57C is configured to: the distal end of the outer tube 57A is connected to the distal end of the inner tube 57B. The light transmitting portion 57C is opposed to the front surface of the annular portion 51A. The light transmitting portion 57C faces the LED chip 52. The light emitted from the LED chip 52 passes through the light transmitting portion 57C and is irradiated to the front of the lamp unit 18.

The light transmitting portion 57C includes: an incident surface 57E on which light from the LED chip 52 is incident, and an exit surface 57F from which light passing through the light transmitting portion 57C is emitted. The front surface of the annular portion 51A faces the incident surface 57E of the light transmitting portion 57C. The incident surface 57E faces the LED chip 52. The incident surface 57E is substantially directed rearward. The emission surface 57F is substantially forward facing.

The protruding portion is arranged in: and is located further downward than the light transmitting portion 57C. The convex portion 57D is provided as: protruding downward from the lower portion of the outer tube 57A. An accommodating space is formed in an upper portion of the rear surface of the protruding portion 57D. The support portion 51B of the substrate 51 is arranged: a housing section is formed at an upper portion of the rear surface of the protruding portion 57D. The convex portion 57D can support the lead 180 extending from the substrate 51.

The inner peripheral side convex portion 57G is arranged: the inner peripheral side is located closer to the light transmitting portion 57C. The inner peripheral side convex portion 57G projects forward from the inner peripheral side of the light transmitting portion 57C. The inner peripheral side convex portion 57G is arranged: the light transmitting portion 57C is positioned further toward the front side than the light emitting surface 57F. The inner peripheral side projection 57G is annular.

The stopper 57H protrudes forward from the lower portion of the inner peripheral side projection 57G. The stopper portions 57H are provided 2 at the lower portion of the inner peripheral side convex portion 57G. The 2 stoppers 57H are arranged at intervals in the left-right direction. The support portion 51B of the substrate 51 is arranged: a concave portion 57J provided at the rear of the optical member 57. By fitting the support portion 51B into the recess 57J and positioning the substrate 51 to the optical member 57, suppression of: relative rotation between the substrate 51 and the optical member 57.

The rear surface of the substrate 51 is arranged: the rear end of the outer tube 57A and the rear end of the inner tube 57B are located further forward. At least a part of the inner peripheral surface of the outer tube 57A and the rear surface of the substrate 51 are fixed by an adhesive. At least a part of the outer peripheral surface of the inner tube 57B and the rear surface of the substrate 51 are fixed by an adhesive. The COB lamp 50 and the optical member 57 are fixed.

The hammer housing 4 has: a protrusion 4D disposed at the outer peripheral side of the COB lamp 50. The protruding portion 4D protrudes forward from the COB lamp 50. The protruding portion 4D is substantially annular. The protruding portion 4D is provided as: surrounding the anvil shaft portion 10C. The protruding portion 4D is arranged in: the outer peripheral side position of the optical member 57. The light emitting surface 57F of the light transmitting portion 57C is arranged in the front-rear direction: the same position as the front end face of the protrusion 4D. That is, the emission surface 57F is coplanar with the front end surface of the protrusion 4D. In the front-rear direction, the emission surface 57F of the light transmitting portion 57C may be arranged to: the projection 4D is located further rearward than the front end surface thereof.

A groove 4E is provided in the hammer housing 4 on the inner peripheral side of the protruding portion 4D. The groove 4E is provided as: recessed rearward from the front end of the hammer housing 4. In the radial direction, the groove 4E is provided in: a position between the front tubular portion 4B and the protruding portion 4D. The groove 4E is provided as: surrounding the anvil shaft portion 10C.

COB lamp 50 is configured to: the inside position of the groove 4E. At least a portion of the optical member 57 is configured to: the inside position of the groove 4E. The light transmitting portion 57C is arranged: the inside position of the groove 4E. The outer tube 57A and the inner tube 57B are respectively arranged: the inside position of the groove 4E. The inner peripheral side convex portion 57G is arranged: the front end of the groove 4E is located further toward the front side.

The snap ring 16 is arranged: a snap ring groove 4F provided in the front side tube portion 4B. Snap ring groove 4F is provided in: the front side of the emission surface 57F of the light transmitting portion 57C is positioned farther than the front end surface of the protruding portion 4D. The retainer ring 16 supports the optical member 57 from the front side. In the embodiment, the snap ring 16 supports the inner peripheral side convex portion 57G from the front side.

The stopper 57H supports an end of the snap ring 16. The snap ring 16 has 2 ends. The left end of the snap ring 16 is supported by: the left stopper 57H of the 2 stoppers 57H. The right end of the snap ring 16 is supported by: the right-hand stopper 57H of the 2 stoppers 57H. The left end of the snap ring 16 contacts the left surface of the left stopper 57H. The right end of the snap ring 16 contacts the right surface of the right stopper 57H. The stopper 57H suppresses: the snap ring 16 is rotated relative to the optical member 57.

A buffer member 80 is disposed behind the COB lamp 50. In an embodiment, the cushioning member 80 is a sponge ring. The buffer member 80 is configured to: a position between the rear surface of the COB lamp 50 and the hammer housing 4. The rear surface of the buffer member 80 is in contact with the front surface of the annular portion 4C of the hammer housing 4. The front surface of the buffer member 80 contacts the rear surface of the substrate 51 of the COB lamp 50. The buffer member 80 is disposed in a compressed state: a position between the rear surface of the COB lamp 50 and the hammer housing 4. As described above, the substrate 51 and the optical member 57 are fixed by the adhesive. The retainer ring 16 supports the optical member 57 and the COB lamp 50 from the front side so that the buffer member 80 is compressed. The optical member 57 and the COB lamp 50 are held by the buffer member 80 and the retainer ring 16 from the front-rear direction. In an embodiment, the optical component 57 is separate from the hammer housing 4. The COB light 50 is separated from the hammer housing 4. The COB lamp 50 and the optical member 57 are held by the hammer case 4 via the buffer member 80 and the retainer ring 16, respectively.

< Hammer case and housing >)

The anvil shaft portion 10C is configured to: is located further toward the inner peripheral side than the optical member 57. The anvil bearing 46 is held by the hammer case 4, and rotatably supports the anvil shaft portion 10C. Anvil bearing 46 is insert molded to hammer housing 4. In the embodiment, the front end portion of the front outer cylinder portion 47F of the hammer 47 is disposed at: and is located further to the front side than the rear end portion of the anvil bearing 46. That is, at least a portion of the hammer 47 overlaps the anvil bearing 46 in the front-rear direction. The seal member 17 is prevented from coming off by the front side tube portion 4B.

As shown in fig. 5, the hammer housing 4 has: a convex portion 4K protruding rearward from the rear surface of the annular portion 4C. The outer sleeve 46A has: a flange portion 46C extending radially outward from a rear end portion of the outer sleeve 46A. The front end portion of the front outer tube portion 47F is disposed at: the rear end of the projection 4K is located further toward the front side. The front end portion of the front outer tube portion 47F is disposed at: a position further toward the front side than the rear end portion of the flange portion 46C. That is, the front end portion of the front outer tube portion 47F overlaps the protruding portion 4K and the flange portion 46C in the front-rear direction. Accordingly, the inertial force of the hammer 47 becomes large. Further, since the flange portion 46C abuts against the anvil protruding portion 10D, it is possible to suppress: the convex portion 4K is shaved off by the anvil protruding portion 10D. The retainer ring 16 overlaps the seal member 17 in the front-rear direction. Since the sealing member 17 is disposed at the rear position, it is possible to suppress: the dimension of the impact tool 1 in the front-rear direction becomes longer.

The motor housing portion 21 is configured to: the lower 2 screw boss portions 4H out of the 4 screw boss portions 4H are covered. The housing 2 has: a cover 21C covering the convex portion 57D of the optical member 57 from the front side. Even if at least a part of the light emitted from the COB lamp 50 enters the convex portion 57D, the light emitted from the convex portion 57D is blocked by the cover portion 21C. That is, the cover portion 21C can suppress: leakage of light from the convex portion 57D.

As shown in fig. 11, the hammer housing 4 has: an opposing surface 4J opposing the upper surface 21D of the cover 21C. The facing surface 4J includes: a left facing surface 4J facing the upper surface 21D of the cover portion 21C of the left housing 2L, and a right facing surface 4J facing the upper surface 21D of the cover portion 21C of the right housing 2R. In the plane orthogonal to the rotation axis AX, the facing surface 4J is provided as: extending in the left-right direction. The facing surface 4J is linear in a plane orthogonal to the rotation axis AX. As shown in fig. 10, the housing 2 includes: left housing 2L and right housing 2R. When the left case 2L and the right case 2R are coupled, the upper surface 21D is brought into contact with the facing surface 4J, whereby the left case 2L and the right case 2R can be aligned. Accordingly, the left case 2L and the right case 2R can be smoothly fixed by the facing surface 4J.

< Method of use >)

When the operator operates the trigger lever 14, the motor 6 is started, and light is emitted from the LED chip 52 of the COB lamp 50. The light emitted from the COB lamp 50 has a high brightness, and thus the work object can be brightly illuminated.

On the other hand, if at least a part of the light emitted from the LED chip 52 passes through the outer tube 57A, if the light emitted from the outer peripheral surface of the outer tube 57A enters the eyes of the operator, the operator may feel blindness, and as a result, it may be difficult to visually recognize the operation object. In the embodiment, the light emitted from the outer peripheral surface of the outer tube 57A is blocked by the protrusion 4D. The protrusion 4D can suppress: the operator is dazzled.

In addition, even if the impact tool 1 falls, for example, the COB lamp 50 is protected by the projection 4D of the hammer case 4. Accordingly, suppression of: breakage of the COB lamp 50 can be suppressed: the light emitting performance of the COB lamp 50 is lowered.

< Effect >

As described above, in the embodiment, the impact tool 1 includes: a motor 6; a hammer 47 rotated by the motor 6; an anvil 10 that is struck in a rotational direction by a hammer 47; a hammer housing 4 that houses a hammer 47; and a COB lamp 50 that irradiates the front end side of the anvil 10. A groove 4E is provided in the hammer housing 4. COB lamps 50 are disposed in the groove 4E.

In the above configuration, since the COB lamp 50 is disposed in the groove 4E, light emitted from the COB lamp 50 toward the front side is irradiated to the work object, and light emitted from the COB lamp 50 toward the outer peripheral side is blocked by the hammer case 4. Accordingly, suppression of: when light emitted from the COB lamp 50 enters the eyes of the operator. Thus, it is possible to suppress: the operator is dazzled. Therefore, it is possible to suppress: it is difficult for the operator to visually recognize the work object.

In an embodiment, the groove 4E is provided as: recessed rearward from the front end of the hammer housing 4.

In the above configuration, light emitted from the COB lamp 50 toward the front side is irradiated with: the front side of the hammer housing 4.

In an embodiment, the groove 4E is provided as: surrounding the anvil 10.

In the above configuration, the groove 4E is provided in a ring shape.

In the embodiment, the impact tool 1 includes an optical member 57, and the optical member 57 includes: a light transmitting portion 57C disposed at a position further forward than the COB lamp 50. At least a part of the optical member 57 is disposed in the groove 4E.

In the above configuration, the light emitted from the COB lamp 50 toward the front side is irradiated to the work object on the front side of the hammer case 4 through the light transmitting portion 57C of the optical member 57. Since the optical member 57 is disposed in the groove 4E, light emitted from the optical member 57 toward the front side is irradiated to the work object, and light emitted from the optical member 57 toward the outer peripheral side is blocked by the hammer case 4.

In the embodiment, the light transmitting portion 57C is disposed in the groove 4E.

In the above configuration, since the light transmitting portion 57C is disposed at the inner position of the groove 4E, the light emitted from the optical member 57 toward the front side is irradiated to the work object, and the light emitted from the optical member 57 toward the outer peripheral side is blocked by the hammer case 4.

In an embodiment, the optical member 57 has: an outer tube 57A disposed at an outer peripheral side of the COB lamp 50, and an inner tube 57B disposed at an inner peripheral side of the COB lamp 50. The outer tube 57A and the inner tube 57B are disposed in the groove 4E, respectively.

In the above configuration, the optical member 57 is configured to: surrounding COB lamp 50.

In the embodiment, the impact tool 1 includes: a motor 6; a hammer 47 rotated by the motor 6; an anvil 10 that is struck in a rotational direction by a hammer 47; a hammer housing 4 that houses a hammer 47; and a COB lamp 50 that irradiates the front end side of the anvil 10. The COB lamp 50 is held to the hammer housing 4. The hammer housing 4 has: a protrusion 4D disposed at the outer peripheral side of the COB lamp 50.

In the above configuration, even if the impact tool 1 falls, for example, the COB lamp 50 is protected by the projection 4D of the hammer case 4. Accordingly, suppression of: breakage of the COB lamp 50 can be suppressed: the light emitting performance of the COB lamp 50 is lowered.

In the embodiment, the protruding portion 4D protrudes forward from the COB lamp 50.

In the above configuration, the COB lamp 50 can be sufficiently protected by the protruding portion 4D.

In the embodiment, the protruding portion 4D is provided as: surrounding the anvil 10.

In the above configuration, the protruding portion 4D is provided in a ring shape.

In an embodiment, COB lamp 50 has: a substrate 51, and an LED chip 52 mounted on the front surface of the substrate 51. The substrate 51 is provided with: surrounding the anvil 10.

In the above configuration, the annular COB lamp 50 is provided in the impact tool 1.

In the embodiment, the impact tool 1 includes an optical member 57, and the optical member 57 includes: a light transmitting portion 57C disposed at a position further forward than the COB lamp 50. The protrusion 4D is disposed at an outer peripheral position of the optical member 57.

In the above configuration, the COB lamp 50 and the optical member 57 are protected by the protruding portion 4D.

In the embodiment, the emission surface 57F of the light transmitting portion 57C is arranged in: the same position as the front end surface of the protrusion 4D or a position further to the rear than the front end surface of the protrusion 4D.

In the above configuration, the optical member 57 can be sufficiently protected by the protruding portion 4D.

In an embodiment, the anvil 10 has: an anvil shaft portion 10C disposed at an inner peripheral side of the optical member 57. The hammer housing 4 has: a front cylinder portion 4B disposed at a position around the anvil shaft portion 10C. The impact tool 1 includes: a snap ring 16 disposed in a snap ring groove 4F provided in the front cylinder portion 4B. The retainer ring 16 supports the optical member 57 from the front side.

In the above configuration, it is possible to suppress: the optical member 57 and the COB lamp 50 are separated from the hammer case 4 toward the front. The clip 16 functions as a drop preventing member that prevents the optical member 57 and the COB lamp 50 from dropping forward.

In the embodiment, the optical member 57 has an inner peripheral convex portion 57G disposed at an inner peripheral side of the light transmitting portion 57C and at a front side of the light emitting surface 57F of the light transmitting portion 57C. The retainer ring 16 supports the inner peripheral side projection 57G.

In the above configuration, the optical member 57 can be stably supported from the front side by the snap ring 16 disposed in the snap ring groove 4F.

In an embodiment, the optical member 57 may have: a stopper 57H for supporting an end of the snap ring 16.

In the above configuration, it is possible to suppress: the clasp 16 rotates relative to the hammer case 4 and the optical member 57. The stopper 57H functions as a rotation stopper for suppressing rotation of the snap ring 16.

In the embodiment, the impact tool 1 includes: and a buffer member 80 disposed between the rear surface of the COB lamp 50 and the hammer case 4.

In the above configuration, it is possible to alleviate: such as the impact applied to COB lamp 50 when impact tool 1 falls down. The COB lamp 50 is held by the buffer member 80 and the snap ring 16 from the front-rear direction, so that it is possible to suppress: the relative position between the COB light 50 and the hammer housing 4 changes.

In an embodiment, the optical member 57 has: a convex portion 57D disposed below the light transmitting portion 57C. The impact tool 1 includes: a housing 2 fixed to the rear of the hammer case 4 and accommodating the motor 6. The housing 2 has: a cover portion 21C covering the convex portion 57D from the front side.

In the above configuration, the lead wire connected to the COB lamp 50 is supported by the convex portion 57D. The convex portion 57D is protected by the cover portion 21C. In addition, even if at least a part of the light emitted from the COB lamp 50 enters the convex portion 57D, the light emitted from the convex portion 57D is blocked by the cover portion 21C.

In an embodiment, the hammer housing 4 has: an opposing surface 4J opposing the upper surface 21D of the cover 21C. The facing surface 4J is provided with: extending in the left-right direction.

In the above configuration, when the case 2 is a so-called half-divided case composed of the left case 2L and the right case 2R, the left case 2L and the right case 2R can be smoothly fixed by the facing surface 4J.

In the embodiment, the impact tool 1 includes: the housing 2 is fixed to the rear position of the hammer case 4 by a screw 5, and accommodates a motor 6. The hammer housing 4 has: a threaded boss portion 4H coupled to the screw 5. At least a portion of the housing 2 is configured to: the screw boss portion 4H is covered.

In the above configuration, the screw boss portion 4H of the hammer case 4 is protected by the housing 2. In addition, inhibition can be achieved: the hand of the operator holding the grip 22 of the housing 2 directly contacts the hammer case 4.

In an embodiment, the anvil 10 has: an anvil shaft portion 10C disposed at an inner peripheral side of the optical member 57. The impact tool 1 includes: anvil bearing 46 which is held by hammer case 4 and rotatably supports anvil shaft portion 10C. The front end portion of the hammer 47 is disposed: and is located further to the front side than the rear end portion of the anvil bearing 46.

In the above configuration, since the hammer case 4 overlaps the anvil bearing 46, it is possible to suppress: the impact tool 1 is enlarged. Can shorten: the length (so-called the overall length) of the upper portion of the impact tool 1 in the front-rear direction.

[ Embodiment 2]

Embodiment 2 will be described. In the following description, the same or equivalent components as those in the above-described embodiment are given the same reference numerals, and the description of the components is simplified or omitted.

Fig. 12 is a perspective view showing an upper portion of the impact tool 1B according to the embodiment as viewed from the front. Fig. 13 is a perspective view showing an upper portion of the impact tool 1B according to the embodiment as viewed from the rear. Fig. 14 is a side view showing an upper portion of the impact tool 1B according to the embodiment. Fig. 15 is a longitudinal sectional view showing a part of the impact tool 1B according to the embodiment. Fig. 16 is an enlarged longitudinal sectional view of a part of the impact tool 1B according to the embodiment. Fig. 17 is a transverse cross-sectional view showing an upper portion of the impact tool 1B according to the embodiment, which corresponds to a sectional view taken along line A-A in fig. 14. Fig. 18 is a transverse cross-sectional view showing an upper portion of the impact tool 1B according to the embodiment, and corresponds to a cross-sectional view taken along line B-B in fig. 14. Fig. 19 is an exploded perspective view showing an upper portion of the impact tool 1B according to the embodiment as viewed from the front. Fig. 20 is an exploded perspective view showing the damper 90 and the lamp unit 18 according to the embodiment as viewed from the rear. Fig. 21 is an exploded view showing an upper portion of the impact tool 1B according to the embodiment as viewed from the front.

As in the above embodiment, the impact tool 1B is an impact wrench. The impact tool 1B includes: the housing 2, the rear cover 3, the hammer case 104, the screw 5, the spindle 8, the striking mechanism 9, the anvil 10, the trigger gear 14, the reverse-rotation switching gear 15, the circlip 116, the sealing member 17, the lamp unit 18, and the damper 90.

The hammer housing 104 accommodates the main shaft 8. The hammer case 104 houses the striking mechanism 9. As in the above embodiment, the striking mechanism 9 is disposed: the motor 6 is located further to the front side. The striking mechanism 9 is driven by the motor 6. The hammer housing 104 houses a portion of the anvil 10. The hammer housing 104 is made of metal. In an embodiment, the hammer housing 104 is made of aluminum. The hammer housing 104 is cylindrical.

The hammer housing 104 includes: rear-side tube portion 4A, front-side tube portion 4B, annular portion 4C, protruding portion 4D, groove 4E, screw boss portion 4H, damper groove 4L, and circlip groove 4M. The striking mechanism 9 is housed in the rear cylinder portion 4A. The front side tube portion 4B is disposed: a position further toward the front side than the rear side tube portion 4A. The rear cylinder portion 4A has an outer diameter larger than that of the front cylinder portion 4B. The inner diameter of the rear cylinder portion 4A is larger than the inner diameter of the front cylinder portion 4B. The annular portion 4C is configured to: the front end of the rear cylinder 4A is connected to the rear end of the front cylinder 4B. The protruding portion 4D protrudes forward from the outer edge portion of the annular portion 4C. The protrusion 4D is annular in a plane orthogonal to the rotation axis AX.

The hammer case 104 is connected to the front of the motor housing 21 of the housing 2. The motor housing 21 houses the rear portion of the hammer case 104. The motor housing 21 is fixed to the rear of the hammer case 104 by the screw 5. The screw 5 is inserted into an opening provided in the screw boss portion 2H from the rear of the screw boss portion 2H, and then inserted into a screw hole provided in the screw boss portion 4H. The number of screw boss portions 2H and 4H is 4 in the circumferential direction. The screws 5 are provided with 4 in the circumferential direction.

The screw 3S for fixing the rear cover 3 to the motor housing portion 21 is fastened from the rear of the rear cover 3. The screw 5 for fixing the motor housing 21 to the hammer case 104 is fastened from the rear of the screw boss portion 2H. Since all of the 6 screws (2 screws 3S and 4 screws 5) are fastened from the rear, the workability of assembling the impact tool 1B is optimized. The assembler who assembles the impact tool 1B can fasten all of the 6 screws (2 screws 3S and 4 screws 5) from the rear without changing the orientation of the impact tool 1B.

The screw boss portions 2H are provided respectively in: the upper left, lower left, upper right, and lower right of the rotation axis AX. The screw boss portions 4H are provided respectively in: the upper left, lower left, upper right, and lower right of the rotation axis AX. The screw boss portion 4H includes: an upper left and right screw boss portion 4Ha, and lower left and right screw boss portion 4Hb. The front of the motor housing 21 covers at least a part of the surface of the hammer case 104. The front portion of the motor housing portion 21 covers at least the surface of the lower left screw boss portion 4Hb and the surface of the lower right screw boss portion 4Hb. In the up-down direction, the upper end portion 2A of the motor housing portion 21 covering the surface of the hammer case 104 is arranged: and is located further upward than the center of the hammer case 104. The front end portion 2B of the motor housing portion 21 covering the surface of the hammer case 104 in the front-rear direction is arranged in: and is located further toward the front side than the rear end portion of the damper 90. That is, the motor housing portion 21 covers a part of the damper 90. The forward/reverse shift lever 15 is disposed: is provided at an inner side position of the opening 2C at a lower portion of the motor housing portion 21.

As shown in fig. 12, 13, 14, 17, and 18, the motor housing portion 21 does not cover the surface of the upper left screw boss portion 4Ha and the surface of the upper right screw boss portion 4 Ha. The motor housing portion 21 may cover the surface of the upper left screw boss portion 4Ha and the surface of the upper right screw boss portion 4 Ha.

For example, the hammer housing 104 may be heated due to the rotation of the main shaft 8, the operation of the striking mechanism 9, and the like. Since the surface of the lower portion of the hammer housing 104 including the surface of the lower left screw boss portion 4Hb and the surface of the lower right screw boss portion 4Hb is covered by the motor housing portion 21, when the operator operates the forward/reverse rotation switching gear 15 or the trigger gear 14, it is possible to suppress: the operator's hand is in direct contact with the hammer housing 104.

The spindle 8 is rotated by the rotation of the motor 6. The striking mechanism 9 strikes the anvil 10 in the rotational direction based on the rotational force of the main shaft 8. The anvil 10 is: an output part of the impact tool 1B operated by the rotational force of the motor 6.

The anvil shaft portion 10C of the anvil 10 is rotatably supported by an anvil bearing 146. Anvil bearing 146 is an oilless bearing that is one type of plain bearing. Anvil bearing 146 is made of iron. Anvil bearing 146 is cylindrical.

In the embodiment, the anvil bearing 146 is held to the front side barrel portion 4B of the hammer case 104 via the bushing 81. The bushing 81 is made of iron. The bushing 81 is fixed to the hammer housing 104 by insert molding.

The bushing 81 has: a tube portion 81A disposed at an inner side position of the front tube portion 4B, and a flange portion 81B extending radially outward from a rear end portion of the tube portion 81A. The tube 81A is fixed to: an inner peripheral surface of the front tubular portion 4B. The flange portion 81B is fixed to: the rear surface of the annular portion 4C. In the embodiment, the front side tube portion 4B has: a convex portion 4N protruding radially inward from the inner peripheral surface of the front side tubular portion 4B. The bush 81 and the front-side tube portion 4B are firmly fixed by the hooking effect by the convex portion 4N.

After the bushing 81 is provided to the hammer housing 104 by insert molding, the anvil bearing 146 is pressed into: the inner side position of the cylindrical portion 81A of the bushing 81. As described above, the hammer housing 104 is made of aluminum and the bushing 81 is made of iron. The hardness of the bushing 81 is higher than that of the front side tube portion 4B. Since the anvil bearing 146 is pressed into the bushing 81 having a high hardness, the anvil bearing 146 is firmly fixed to the bushing 81. Even if the size of the anvil bearing 146 in the front-rear direction is short, the anvil bearing 146 is firmly fixed to the bushing 81.

Further, the bushing 81 may also be secured to the hammer housing 104 by a different method than insert molding. The bush 81 may be fixed to the front side tube portion 4B after the surface of the bush 81 is knurled or serrated.

The flange 81B protects the rear surface of the annular portion 4C. The front surface of the anvil projection 10D is likely to contact the rear surface of the annular portion 4C. By providing the flange portion 81B on the rear surface of the annular portion 4C, the front surface of the anvil projection 10D abuts against the flange portion 81B before abutting against the rear surface of the annular portion 4C. Accordingly, suppression of: the rear surface of the annular portion 4C is worn.

The lamp unit 18 is configured to: the front of the hammer housing 104. The lamp unit 18 has a ring shape. The lamp unit 18 is configured to: around the front side tube portion 4B. The lamp unit 18 is disposed around the anvil shaft portion 10C via the front side tube portion 4B.

As in the above embodiment, the lamp unit 18 includes: COB lamp 50 and optical member 57. At least a portion of the optical member 57 is configured to: and is positioned further forward than COB lamp 50. The optical member 57 has: an outer tube 57A, an inner tube 57B, and a light transmitting portion 57C. The outer tube 57A is disposed: the COB lamp 50 is located at the outer peripheral side. The inner tube 57B is disposed: the COB lamp 50 is positioned at the inner peripheral side. The light transmitting portion 57C is arranged: and is located further to the front side than the COB lamp 50. The light emitted from the COB lamp 50 passes through the light transmitting portion 57C and is irradiated to the front of the lamp unit 18. A buffer member 80 is disposed behind the COB lamp 50.

The protrusion 4D of the hammer case 104 is arranged to: the COB lamp 50 is located at the outer peripheral side. The protruding portion 4D protrudes forward from the COB lamp 50. The protruding portion 4D is substantially annular. The protruding portion 4D is arranged in: the outer peripheral side position of the optical member 57. The front surface of the light transmitting portion 57C is disposed: the projection 4D is located further rearward than the front end surface thereof.

A groove 4E is provided in the hammer case 104 on the inner peripheral side of the protruding portion 4D. A slot 4E is provided in the front of the hammer housing 104. The groove 4E is annular in a plane orthogonal to the rotation axis AX. The groove 4E is provided as: recessed rearward from the front end of the hammer housing 104. In the radial direction, the groove 4E is provided in: a position between the front tubular portion 4B and the protruding portion 4D. The groove 4E is provided as: surrounding the anvil shaft portion 10C. The lamp unit 18 is configured to: the inside position of the groove 4E.

The circlip 116 is configured to: a circlip groove 4M provided on the front side tube portion 4B. The spring ring groove 4M is provided in: a position further toward the front side than the front surface of the light transmitting portion 57C. The circlip 116 supports the optical member 57 from the front side. The circlip 116 contacts the radially inner edge portion of the front surface of the light transmitting portion 57C.

The buffer 90 is configured to: the front end portion of the surface of the hammer case 104 is covered. The damper 90 has a ring shape. The buffer 90 is configured to: radially outward of the lamp unit 18. The buffer 90 protects the lamp unit 18. The bumper 90 protects at least a portion of the hammer housing 104.

The position of the lamp unit 18 is the same as the position of at least a part of the buffer 90 in the front-rear direction. That is, the damper 90 overlaps with the lamp unit 18 in the axial direction.

In addition, the position of the lamp unit 18 is the same as the position of at least a part of the anvil bearing 146 in the front-rear direction. That is, in the axial direction, the anvil bearing 146 overlaps the lamp unit 18.

The damper 90 is made of an elastomer. The elastomer forming the damper 90 may be a thermoplastic elastomer or a thermosetting elastomer. The rubber hardness of the damper 90 is 100Hs JIS-A or less.

The buffer 90 is configured to: the outer peripheral surface of the protruding portion 4D and the distal end surface of the protruding portion 4D are covered. The buffer 90 has: a cylindrical portion 91 covering the outer peripheral surface of the protruding portion 4D, an annular portion 92 covering the distal end surface of the protruding portion 4D, and a convex portion 93 protruding radially inward from the inner peripheral surface of the cylindrical portion 91. The convex portion 93 is annular in a plane orthogonal to the rotation axis AX.

A damper groove 4L is provided on the outer peripheral surface of the protruding portion 4D. The buffer tank 4L is provided with: surrounding the rotation axis AX. The convex portion 93 is inserted into: and a damper groove 4L provided on the outer peripheral surface of the protrusion 4D.

The rear end portion of the damper 90 is arranged in the front-rear direction: and is located further toward the front side than the front end portion of the hammer 47.

As shown in fig. 19, a slit 105 is provided in a lower portion of the front end portion of the hammer case 104. The convex portion 57D of the optical member 57 of the lamp unit 18 is fitted into the slit 105. By fitting the convex portion 57D into the slit 105, suppression can be achieved: relative rotation of the light unit 18 with respect to the hammer housing 104.

As shown in fig. 19, 20, and 21, the buffer 90 includes: a protrusion 94 protruding downward from the lower portion of the cylindrical portion 91. As shown in fig. 21, the protrusion 94 is sandwiched between the left case 2L and the right case 2R from the left-right direction. The cover portion 21C of the motor housing portion 21 covers the protruding portion 94 from the front side. Accordingly, suppression of: the damper 90 is disengaged forward from the housing 2 or rotated relative to the housing 2.

As described above, according to the embodiment, the damper 90 made of an elastic material is fixed around the protruding portion 4D. The buffer 90 protects the lamp unit 18. For example, when the impact tool 1B collides with an object in the vicinity, the buffer 90 collides with the object, and the impact transmitted from the object to the lamp unit 18 can be alleviated by the elastic force of the buffer 90. Accordingly, suppression of: the light emission performance of the lamp unit 18 is lowered.

< Modification >

A modification of the impact tool 1B according to the present embodiment will be described below.

In the above embodiment, the buffer 90 is arranged in: further radially outward than the optical member 97. The front end portion of the damper 90 may be opposed to the outer edge portion of the front surface of the optical member 97. The damper 90 may also function as a drop-off preventing member that prevents the lamp unit 18 from moving forward from the inside of the groove 4E.

In the above embodiment, the buffer 90 is arranged in: around the protruding portion 4D. The rear end portion of the damper 90 is disposed: and is located further toward the front side than the front end portion of the hammer 47. The rear end portion of the buffer 90 may also be configured to: the front end of the hammer 47 is located further to the rear side. The bumper 90 may also cover the entire surface of the hammer housing 104.

In the above-described embodiment, the damper 90 is replaceable with respect to the hammer housing 104. In the case where there are a plurality of buffers 90 having different colors, the 1 st impact tool may be equipped with the 1 st buffer 90, and the 1 st impact tool may be equipped with the 2 nd buffer 90. The operator can recognize a plurality of impact tools by the color of the bumper 90.

In the above embodiment, at least a part of the buffer 90 may also be formed of a light storage material. At least a part of the bumper 90 is made of a light storage material, so that the operator can recognize the impact tool 1B even at night, for example.

Fig. 22 is a longitudinal sectional view of a part of the impact tool 1B according to the modification. As shown in fig. 22, in the hammer case 104, the protruding portion 4D may be omitted. The damper 90 may directly support the lamp unit 18 from the radially outer side. The bumper 90 may be in contact with the outer cylindrical portion 57A of the optical member 57 of the lamp unit 18.

As shown in fig. 22, a concave portion 81C may be provided on the rear surface of the flange portion 81B of the bushing 81. The lubricant may be accommodated in the recess 81C. By lubricating oil, it is possible to reduce: sliding resistance when the front surface of the anvil projection 10D contacts the rear surface of the flange 81B.

Further, in the example shown in fig. 22, the buffer 90 and the optical member 57 may be integrally formed.

In the above-described embodiments, the bumper 90 may be secured to the hammer housing 104 by an adhesive. The damper 90 may be fixed to the hammer case 104 by a fixing member such as a screw or a rivet.

In the above-described embodiments, the hammer housing 104 and the bumper 90 may be integrally formed. The bumper 90 may also be secured to the hammer housing 104 by insert molding.

Other embodiments

In the above embodiment, the groove 4E may not be annular, and a plurality of grooves may be provided at intervals around the anvil shaft portion 10C. A COB lamp in the form of a chip and an optical member may be disposed in each of the plurality of grooves 4E.

In the above embodiment, the lamp 50 is a COB lamp. The lamp 50 may also be other than a COB lamp. The lamp 50 has only: the substrate and the light-emitting element mounted on the substrate may be used.

In the above embodiment, the impact tool 1 is an impact wrench. The impact tool 1 may also be an impact driver.

In the above embodiment, the power source of the impact tool 1 may be not the battery pack 25 but a commercial power source (ac power source).

Claims

1. An impact tool, characterized in that,

The impact tool is provided with:

a motor;

a hammer rotated by the motor;

an anvil that is struck in a rotational direction by the hammer;

A hammer housing that houses the hammer; and

A lamp that irradiates light toward a front end side of the anvil,

A groove is provided in the hammer housing,

The lamp is disposed in the slot.

2. The impact tool of claim 1, wherein the impact tool comprises a plurality of blades,

The groove is arranged as follows: and is recessed rearward from the front end of the hammer housing.

3. The impact tool of claim 1, wherein the impact tool comprises a plurality of blades,

The groove is arranged as follows: surrounding the anvil.

4. The impact tool of claim 1, wherein the impact tool comprises a plurality of blades,

The impact tool is provided with an optical member, and the optical member is provided with: a light transmitting portion disposed at a position forward of the lamp,

At least a portion of the optical member is disposed in the groove.

5. The impact tool of claim 4, wherein the impact tool comprises a plurality of blades,

The light transmitting portion is disposed in the groove.

6. The impact tool of claim 5, wherein the impact tool comprises a plurality of blades,

The optical member has: an outer tube portion disposed at an outer peripheral side of the lamp, and an inner tube portion disposed at an inner peripheral side of the lamp,

The outer tube portion and the inner tube portion are disposed in the grooves, respectively.

7. An impact tool, characterized in that,

The impact tool is provided with:

a motor;

a hammer rotated by the motor;

an anvil that is struck in a rotational direction by the hammer;

A hammer housing that houses the hammer; and

A lamp that irradiates light toward a front end side of the anvil,

The light is held to the hammer housing,

The hammer housing has: a protrusion arranged at an outer peripheral side position of the lamp.

8. The impact tool of claim 7, wherein the impact tool comprises a plurality of blades,

The protruding portion protrudes forward than the lamp.

9. The impact tool of claim 7, wherein the impact tool comprises a plurality of blades,

The protrusion is provided with: surrounding the anvil.

10. An impact tool as claimed in claim 3 or 9, characterized in that,

The lamp has: a substrate, and an LED chip mounted on the front surface of the substrate,

The substrate is provided with: surrounding the anvil.

11. The impact tool of claim 9, wherein the impact tool comprises a plurality of blades,

The impact tool is provided with an optical member, and the optical member is provided with: an optical member disposed in the light transmitting portion at a position forward of the lamp,

The protrusion is disposed at an outer peripheral side position of the optical member.

12. The impact tool of claim 11, wherein the impact tool comprises a plurality of blades,

The light transmitting section has an emission surface arranged on: the same position as the front end surface of the protrusion or a position further to the rear than the front end surface of the protrusion.

13. The impact tool of claim 4 or 11, wherein the impact tool comprises a plurality of impact elements,

The anvil has: an anvil shaft portion disposed at an inner peripheral side of the optical member,

The hammer housing has: a front cylinder portion disposed at a position around the anvil shaft portion,

The impact tool is provided with a clasp, and the clasp is configured in: a snap ring groove arranged on the front side cylinder part,

The snap ring supports the optical member from the front side.

14. The impact tool of claim 13, wherein the impact tool comprises a plurality of blades,

The optical member has an inner peripheral convex portion disposed at an inner peripheral side of the light transmitting portion and at a front side of an emission surface of the light transmitting portion,

The snap ring supports the inner peripheral side convex portion.

15. The impact tool of claim 14, wherein the impact tool comprises a plurality of blades,

The optical member has: a stop portion for supporting an end portion of the snap ring.

16. The impact tool of claim 14, wherein the impact tool comprises a plurality of blades,

The impact tool is provided with: and a buffer member disposed between a rear surface of the lamp and the hammer housing.

17. The impact tool of claim 4 or 11, wherein the impact tool comprises a plurality of impact elements,

The optical member has: a convex portion disposed at a position lower than the light transmitting portion,

The impact tool is provided with: a housing fixed to a rear portion of the hammer housing and accommodating the motor,

The housing has: and a cover part covering the convex part from the front side.

18. The impact tool of claim 17, wherein the impact tool comprises a plurality of blades,

The hammer housing has: an opposing surface opposing the upper surface of the cover portion,

The opposing faces are arranged as follows: extending in the left-right direction.

19. The impact tool of claim 1 or 7, wherein the impact tool comprises a plurality of impact elements,

The impact tool is provided with: a housing which is fixed at the rear position of the hammer housing by a screw and accommodates the motor,

The hammer housing has: a threaded boss portion coupled to the screw,

At least a portion of the housing is configured to: and covering the threaded boss portion.

20. The impact tool of claim 4 or 11, wherein the impact tool comprises a plurality of impact elements,

The impact tool is provided with: an anvil bearing which is held by the hammer housing and rotatably supports the anvil shaft portion,

The front end portion of the hammer is configured to: and a position on the front side of the rear end portion of the anvil bearing.

21. The impact tool as claimed in any one of claims 1 to 20, wherein,

The lamp is a COB lamp.

22. An impact tool, characterized in that,

The impact tool is provided with:

a motor;

A striking mechanism that is disposed on the front side of the motor and is driven by the motor;

An anvil that is hit in a rotation direction by the hit mechanism;

a hammer housing that houses the striking mechanism;

an annular lamp unit disposed at a front portion of the hammer case; and

An annular damper made of an elastomer and disposed at a radially outer position of the lamp unit.

23. The impact tool of claim 22, wherein the impact tool comprises,

The position of the lamp unit is the same as the position of at least a part of the buffer in the front-rear direction.

24. The impact tool of claim 22, wherein the impact tool comprises,

An annular groove is provided in the front of the hammer housing,

The lamp unit is disposed in the groove.

25. The impact tool of claim 24, wherein the impact tool comprises,

The impact tool is provided with: an anvil bearing supporting the anvil to be rotatable,

The hammer housing has: a rear barrel portion for accommodating the striking mechanism; a front cylinder portion which is disposed on the front side of the rear cylinder portion and which holds the anvil bearing; an annular portion connecting a front end portion of the rear cylinder portion and a rear end portion of the front cylinder portion; and a protruding portion protruding forward from an outer edge portion of the annular portion,

The groove is provided in: a position between the front side tube portion and the protruding portion,

The buffer is configured to: the outer peripheral surface of the protruding portion is covered.

26. The impact tool of claim 25, wherein the impact tool comprises,

The buffer is configured to: the front end surface of the protruding portion is covered.

27. The impact tool of claim 25, wherein the impact tool comprises,

The buffer has: a cylindrical portion covering an outer peripheral surface of the protruding portion, and a protruding portion protruding radially inward from an inner peripheral surface of the cylindrical portion,

A buffer groove is arranged on the outer peripheral surface of the protruding part,

The convex portion is inserted into the buffer groove.

28. The impact tool of claim 25, wherein the impact tool comprises,

The position of the lamp unit is the same as the position of at least a portion of the anvil bearing in the front-rear direction.

29. The impact tool of claim 22, wherein the impact tool comprises,

The rubber hardness of the damper is 100Hs JIS-A or less.

30. The impact tool of claim 22, wherein the impact tool comprises,

The striking mechanism has: a hammer rotated by the motor,

In the front-rear direction, the buffer is arranged to: a position further to the front side than the hammer.