CN104271318B - Power tool - Google Patents
Power tool Download PDFInfo
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- CN104271318B CN104271318B CN201380022750.2A CN201380022750A CN104271318B CN 104271318 B CN104271318 B CN 104271318B CN 201380022750 A CN201380022750 A CN 201380022750A CN 104271318 B CN104271318 B CN 104271318B
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- Prior art keywords
- anvil
- hammer
- output shaft
- protuberance
- locking ring
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Abstract
The invention provides a kind of power tool, it has by hammer 22 rotation and is accommodated in outer housing and makes the anvil 20 that output shaft 18 rotates.Anvil 20 and output shaft 18 are integrally formed as a unit, and are provided with the carrier 33 relative to the most rotatable predetermined angular of anvil 20.A part of the external peripheral surface of anvil 20 is formed relief surface 20a.Removal surface 33b is formed at and as to be mutually facing place with carrier 33, and by allowing joint pin 37 to be inserted into wherein, has prepared to limit the locking mechanism rotated against between anvil 20 and locking ring 38.When manual rotation tool body is stopped with hour hammer 22, engages pin 37 and limit rotating against between anvil 20 and locking ring 38.When the rotation of motor 4 is activated, the lock-out state between anvil 20 and locking ring 38 is released.
Description
Technical field
The present invention relates to a kind of power tool, when the output shaft of power tool is driven by the driving source of such as electro-motor etc
Driven time dynamic, and fastened the fastening member of such as screw, bolt or the like, and particularly related to such a power work
Tool, in this power tool, when the source of driving stops, manually can tightening fastening member by using tightening tool.
Background technology
As the power tool for trip bolt, bolt etc., it is known that percussion tool, the wherein revolving force quilt of motor
It is transferred to the hammer rotated, in order to power is converted into impulsive force by making hammering beat anvil.As such percussion tool, patent literary composition
Offer 1 and propose a kind of instrument, in this instrument, by steel ball, the rotary motion of hammer is converted into the cam of setback on axial
Being respectively formed on main shaft and hammer, in order to when having reached predetermined tightening torque, this hammer retreats with the pawl of release anvil with hammer
Engagement between portion, and stored by spring, the energy accumulated and the rotation that is applied with hammer when hammer retreats
Energy is to allow hammering to beat anvil, thus tightens or loosens bolt.
Reference listing
Patent documentation
Patent documentation 1: Japanese Patent Application Laid-Open 2011-73087 publication
Summary of the invention
Technical problem
The fastening force of the percussion tool according to patent documentation 1 comes from the energy of accumulation in spring, and this energy makes
Anvil is beaten in hammering.But, in the example of small impingement instrument, its tightening torque is not enough, and in some cases, workman wants
Perform extra to tighten operation.In this case, when using another manual tightening tool of such as screwdriver etc, need
Exchange instrument to be caught, thus cause the most troublesome work.Therefore, it is known to by power operated by making recruitment
Have the power tool self realizing extra rundown process, but, in this case, by using power tool to carry out tightly
Gu after Gong Zuo, need to operate output shaft locking press button, and after manually fastening work, it is also desirable to release output shaft lock
Fixed, thus result in troublesome switch operating.
In view of situation mentioned above, devise the present invention, and its main purpose is to provide a kind of power tool, when
When the driving source of such as motor etc is stopped, the main body of this power tool can be used as tightening tool.
The solution of problem
Include according to power tool on the one hand: outer housing, it accommodates driving source；Hammer, it is by driving source in direction of rotation
Upper driving；Anvil, when engaging with hammer, it is driven in a rotational direction；And locking mechanism, its switching is about whether locking anvil
Relative to the pattern of the rotation of outer housing, and this structure is characterised by, locking release component is attached pivotally to anvil, and
When hammer rotate time, hammer engage with anvil before, hammer into shape with lock release component engage with release locking mechanism lock-out state, and
When hammer engages with anvil, locking release component is pivotable between hammer and anvil.
Include according to power tool on the other hand: outer housing, it accommodates driving source；Hammer, it is by driving source in rotation side
It is driven up, and it has the first protuberance extended on axis；Axle portion, it can rotate relative to outer housing；Anvil, its tool
There is outward extending second protuberance from axle portion diametrically, to engage with the first protuberance；And locking mechanism, it switches pass
In whether locking the anvil pattern relative to the rotation of outer housing, and this structure is characterised by, locking release component is pivotally
It is attached to anvil, and when hammer rotates, before the first protuberance and the second protuberance engage, the first protuberance and locking release
Component engages to discharge the lock-out state of locking mechanism, and forms one of receiving locking release component on the first protuberance
The recess divided.
Power tool according to another aspect includes: drive source；Hammer, it rotates by driving source；Anvil, it is by hammer continuously
Ground or be rotated intermittently；And outer housing, its receiving driving source, hammer and anvil, power tool makes the output shaft being connected to anvil rotate, should
Power tool is characterised by, anvil and output shaft are integrally formed, and is mounted with cylinder in this power tool further
Carrier component, it is formed on the circumferencial direction centered by the axis of output shaft, can be relative in predetermined angle
Rotate in anvil, during wherein output shaft is inserted into carrier component；Locking ring, it limits carrier component in the direction along axis
Upper movement；The relief surface of flat shape, relief surface in a part for its external peripheral surface being formed on anvil；First cuts out
Portion, it is carrier component and is formed on the position relative with relief surface；And engagement member, it is formed on first and cuts
Go out in portion and limit rotating against between anvil and locking ring.
Power tool according to another aspect includes: drive member, and it rotates by driving source；Output shaft, it is by driving
Dynamic component rotates；And first engagement member and the second engagement member, it can move between latched position and locking off-position
Dynamic, wherein at latched position, it carries out being coupled so that output shaft is non-rotatable with output shaft, makes at locking off-position
Output shaft is rotatable, and in such an embodiment, separately installed engages respectively with the first engagement member and the second engagement member
The first carrier component and the second carrier component, in order to when drive member is rotated relative to output shaft by driving source,
Drive member is coupled so that the first engagement member and the second engagement member with the first carrier component and the second carrier component
Move to lock off-position from latched position.
Power tool according to another aspect includes: drive source；Hammer, it rotates by driving source；Anvil, it is by hammer continuously
Ground or be rotated intermittently；And shell, it accommodates driving source, hammer and anvil, and makes the output shaft being connected to anvil rotate, and this moves
Power instrument is characterised by, anvil and output shaft are integrally formed, and is mounted with holding of cylinder in this power tool further
Carrier component, it is attached to can rotate tiny angle on the same axis relative to anvil, and wherein output shaft is inserted into and holds
Carrier component；Locking ring, the external peripheral surface of its supporting carrier component；The relief surface of flat shape, it is formed on anvil
External peripheral surface on；First cut-out portion, it is formed on carrier component in the position relative with relief surface；And
Junction surface, it is formed in the first cut-out portion, and limits rotating against between anvil and locking ring；Further, carrier component
It is organized on the circumferencial direction centered by the axis of output shaft two components divided.
Including according to otherwise power tool: drive member, the driving force in transmission driving source is passed to this driving
Component；Output shaft, it is rotated by drive member；First engagement member and the second engagement member, it can be at latched position and lock
Determining to move between off-position, wherein at latched position, with output shaft, it is coupled so that output shaft is non-rotatable, in locking
Make output shaft rotatable at off-position；And outer housing, it accommodates drive member and the first engagement member and second and engages
Component, and this power tool is characterised by, it is possible to the locking component contacted with the first engagement member and the second engagement member
It is formed on the periphery of output shaft, so that it can move on the circumferencial direction of output shaft, and when shell is along with fixing
When output shaft rotates, locking component and the first engagement member and the second engagement member contact, in order to by the first engagement member and the
Two engagement members move to latched position.
The advantageous effects of invention
According to the present invention, arranged, in order to when hammer rotates, before the hammer joint with anvil, hammer into shape and lock release
Component engages to discharge the locking of locking mechanism, and along with hammer engages with anvil so that locking release component is between hammer and anvil
Pivot；Therefore, when hammer rotates, the locking of locking mechanism is first discharged, in order to make anvil rotatable.Additionally, due to that hammers into shape rushes
The power of hitting be not passed through lock release component but be communicated directly to anvil, even if so when lock release component rigidity relatively low time,
The impulsive force of hammer is still delivered effectively.
Accompanying drawing explanation
Fig. 1 is the integrally-built longitudinal sectional view representing percussion tool according to the first embodiment of the invention.
Fig. 2 is the exploded perspective view of the vicinity of the impact portion representing Fig. 1.
Fig. 3 is the expansion sectional view of the vicinity of the impact portion representing Fig. 1.
Fig. 4 is the assembling stereogram of the vicinity of the impact portion representing Fig. 1.
Fig. 5 is the local wide figure of the shape representing hammer, carrier and anvil according to the embodiment of the present invention.
Fig. 6 A is to represent when by driving percussion tool according to the first embodiment of the invention to perform to fasten work
Time the view of state.
Fig. 6 B is to represent when by driving percussion tool according to the embodiment of the present invention to perform to fasten work
The view of state.
Fig. 6 C is to represent when by driving percussion tool according to the embodiment of the present invention to perform to fasten work
The view of state.
Fig. 6 D is to represent when by driving percussion tool according to the embodiment of the present invention to perform to fasten work
The view of state.
Fig. 7 A is for regarding of position relationship that intercept along the A-A section view position of Fig. 4, between anvil and joint pin is described
Figure.
Fig. 7 B is for regarding of position relationship that intercept along the A-A section view position of Fig. 4, between anvil and joint pin is described
Figure.
Fig. 8 A is to represent to perform manually fastening work when percussion tool according to the embodiment of the present invention is stopped
The view of state.
Fig. 8 B is to represent to perform manually fastening work when percussion tool according to the embodiment of the present invention is stopped
The view of state.
Fig. 8 C is to represent to perform manually fastening work when percussion tool according to the embodiment of the present invention is stopped
The view of state.
Fig. 9 is the expansion sectional view of the vicinity representing impact portion second embodiment of the invention.
Figure 10 is the side view representing the outward appearance when percussion tool is straightened according to third embodiment of the present invention.
Figure 11 is the side view representing the outward appearance when percussion tool is bent according to the embodiment of the present invention.
Figure 12 is the view of the internal structure of the percussion tool representing Figure 10, and is from motor and trigger unit just to represent
The longitudinal sectional view that face intercepts.
Figure 13 is the exploded perspective view of the vicinity of the impact portion representing Figure 10.
Figure 14 is the partial sectional view of the amplification representing the mounting structure near the locking ring of Figure 12.
Figure 15 is the partial sectional view of the vicinity representing the hammer of Figure 14, carrier and anvil.
Figure 16 A be for explanation hammer, position relationship between carrier and anvil, along A-A section view position and B-B section view
The sectional view that position intercepts.
Figure 16 B be for explanation hammer, position relationship between carrier and anvil, along A-A section view position and B-B section view
The sectional view that position intercepts.
Figure 16 C be for explanation hammer, position relationship between carrier and anvil, along A-A section view position and B-B section view
The sectional view that position intercepts.
Figure 16 D be for explanation hammer, position relationship between carrier and anvil, along A-A section view position and B-B section view
The sectional view that position intercepts.
Figure 17 A is the axonometric chart of the shape of the carrier representing Figure 13.
Figure 17 B is the sectional view of the A-A portion intercepts along Figure 14.
Figure 18 A is the axonometric chart of the shape of the individual unit of the carrier representing Figure 13.
Figure 18 B is the axonometric chart of the shape of the individual unit of the carrier representing Figure 13.
Figure 19 A be along Figure 14 A-A section view position intercept, for explanation anvil and engage pin between position relationship
View.
Figure 19 B be along Figure 14 A-A section view position intercept, for explanation anvil and engage pin between position relationship
View.
Figure 20 A is the axonometric chart of the shape representing carrier.
Figure 20 B is to represent at carrier, the sectional view of position relationship that engages between pin and locking ring.
Figure 21 A is for explanation regarding at the position relationship hammered into shape between anvil when using the carrier of Figure 20 A to 20B
Figure, and be the sectional view of the part corresponding with the B-B section view position of Figure 14.
Figure 21 B is for explanation regarding at the position relationship hammered into shape between anvil when using the carrier of Figure 20 A to 20B
Figure, and be the sectional view of the part corresponding with the A-A section view position of Figure 14.
Figure 22 is the side view of the outward appearance when percussion tool is straightened representing the 4th embodiment according to the present invention.
Figure 23 is the side view of the outward appearance when percussion tool is bent representing the 4th embodiment according to the present invention.
Figure 24 is the view of the internal structure of the percussion tool representing Figure 22, and is from motor and trigger unit just to represent
The longitudinal sectional view that face intercepts.
Figure 25 is the exploded perspective view of the vicinity of the impact portion representing Figure 22.
Figure 26 is the partial sectional view of the amplification of the vicinity of the locking ring representing Figure 24.
Figure 27 is the sectional view of the A-A portion intercepts along Figure 26.
Figure 28 is the axonometric chart of the shape of the component of the separation representing Figure 25.
Figure 29 A is the axonometric chart of the individual unit of the component of the separation representing Figure 25.
Figure 29 B is the axonometric chart of the individual unit of the component of the separation representing Figure 25.
Figure 30 be represent according to the embodiment of the present invention percussion tool stop after, when perform manually fasten work
Time the view of state, and be the sectional view of the position corresponding with the A-A part of Figure 26.
Figure 31 A be along Figure 26 A-A section view position intercept, for explanation anvil and engage pin between position relationship
View.
Figure 31 B be along Figure 26 A-A section view position intercept, for explanation anvil and engage pin between position relationship
View.
Figure 32 A is the sectional view representing the structure in the case of when utilizing screw that locking ring is fixed to outer housing, and
And be the sectional view of the part corresponding with the A-A part of Figure 26.
Figure 32 B is the sectional view representing the structure in the case of when utilizing screw that locking ring is fixed to outer housing, and
And be the sectional view of the part corresponding with the B-B part of Figure 26.
Figure 33 is the local of the internal structure of the main outer housing of the driver brill representing the 5th embodiment according to the present invention
Sectional view.
Figure 34 is the sectional view of the G-G part representing Figure 33.
Detailed description of the invention
Embodiment 1
Hereinafter, first embodiment of the present invention will be described with reference to the drawings.Additionally, in accompanying drawing subsequently, use
Identical reference indicates identical part, and will omit repeated description.In this manual, will be at vertical and horizontal
Explanation is given on the premise of corresponding with indicated in the accompanying drawings direction.Fig. 1 is to be denoted as the first reality according to the present invention
Execute the sectional view of the integral part of the percussion tool 1 of an example of the power tool of mode.Percussion tool 1 includes motor 4, subtracts
Su Qi mechanism 10, output shaft 18, anvil 20, hammer 22 and main shaft 28.Motor 4, reducing gear 10, output shaft 18, anvil 20, hammer 22 and
Main shaft 28 is set centered by axis X in coaxial fashion.
In these components, output shaft 18 is being arranged on forefront along the direction of axis X, and motor 4 is along axle
It is arranged on rearmost part on the direction of line X.In the present invention, axis X is corresponding with the axis of output shaft 18.Gear reducer mechanism
10, anvil 20, hammer 22 and main shaft 28 are being arranged between motor 4 and output shaft 18 along the direction of axis X.In this specification
In, term " forward " refers to the direction along axis X, relative with the direction close to output shaft 18 or the part near output shaft 18
Should.In this manual, term " backwards " refers to the direction along axis X, with direction close to motor 4 or near motor 4
Part is corresponding.
Percussion tool 1 utilizes the power supply from set of cells 50 supply, and makes the motor 4 serving as driving source rotate.Set of cells 50
Having cylinder substantially, the opening 3a of its end that can be passed through battery enclosure 3 is attached to inner space or from interior
Space, portion is dismantled, and it is designed to form so-called magazine.Two plug pin portion 51 are formed in set of cells 50.Additionally,
Recess is formed on the inwall of battery enclosure 3.Plug pin portion 51a and recess are engaged with each other with support pack 50.
In order to dismantle set of cells 50, through opening 3a, set of cells 50 is pulled out while latch 51 is depressed.Three lithiums
Within ion battery cell is accommodated in set of cells 50, and its rated voltage is configured to 10.8V DC voltage.Set of cells 50
Rearward end, i.e. the downside of Fig. 1, there is the shape of opening 3a covering battery enclosure 3.Substrate 54 is formed at and is extended to opening
The other end in the attachment space of the set of cells 50 of 3a, and it is mounted with the multiple terminals 52 extended from substrate 54 to opening 3a.Many
Individual terminal 53 is formed on the leading section of set of cells 50.The leading section of set of cells 50 refers to triggering switch 7 in set of cells 50
The end of side.By set of cells 50 is attached in battery enclosure 3 so that terminal 53 and the terminal 52 being formed at substrate 54 side connect
Touch.
The reducing gear 10 that is rotated through of motor 4 is decelerated, and is passed to main shaft 28 so that main shaft 28 is driven into
Rotate at a predetermined rate.The outer housing of percussion tool 1 is organized into motor housing 2 and battery enclosure 3.Motor housing 2 and battery
Each in outer housing 3 can pivot about 70 degree centered by pivot axis 8, and Fig. 1 illustrates them and pivoted
State.In the case of the main body by using percussion tool 1 is manually tightened and unclamped fastening member, by retouching after a while
That states makes output shaft locking mechanism action, as shown in Figure 1, after battery case 3 is pivoted, preferably holds
Row operation.
Although additionally, do not represent in the accompanying drawings, but battery case 3 can be pivoted to the rotation with main shaft 28 and motor
Axle 4a is coaxially disposed.Motor housing 2 is formed, so that it is divided by the moulding process of the synthetic resin of such as plastics etc
Become two separate parts of right and left, and right part and left part are fixed by the screw being had been not shown by use.This embodiment party
In the power tool of formula, beater mechanism 19 and reducing gear 10 be received directly in the motor housing 2 be made up of synthetic resin it
In.Furthermore it is possible to install generally cup-shaped housing, such as, hammering housing into shape, it is formed by integral forming process.In the structure shown here,
Beater mechanism 19 and reducing gear 10 are accommodated in hammer housing, and hammer housing into shape and be subsequently attached to motor housing.
The triggering switch 7 being used for controlling the Open-closure of the rotation of motor 4 is attached to percussion tool 1.Opening of motor 4
The state of opening refers to motor 4 and is rotated, and the closed mode of motor 4 refers to motor 4 and is stopped.Trigger switch 7 permission work
People pulls trigger 6, to produce opening or closed mode.In the present embodiment, trigger switch 7 and serve as Open-closure
Permutator.Furthermore it is possible to install variable power switch to replace permutator, in order to can come in response to the amount of pulling of trigger 6
Adjust the revolution of motor 4.
Rotary sampling switch 9 is the switch of the direction of rotation for switching motor 4, and it makes in forwards/reverse
The direction of rotation of switching output shaft 18 is possibly realized.In this manual, will be forward rotation when the direction of rotation of output shaft 18
Screw or bolt can be tightened when turning direction and screw can be unclamped when the direction of rotation of output shaft 18 is and reversely rotates direction
Or on the premise of bolt, provide explanation.
Reducing gear 10 includes multiple planetary gear 12, and rotary shaft 4a of motor 4 is connected to too through these planetary gears
Sun gear 11, and planetary gear 12 rotate in the gap relative to the internal gear 13 being positioned at outer circumferential sides while around
Central gear 11 rotates.Main shaft 28 is the component for making hammer 22 rotate, and the rearward end of main shaft 28 is connected to multiple planet
The rotary shaft of each in gear, to produce the function as pinion frame.Therefore, the rotary motion quilt of planetary gear 12
It is converted into the rotary motion of main shaft 28.Main shaft 28 is coupled to hammer into shape 22 by cam mechanism, and this cam mechanism consists of formation
V-shaped cam path 26 on the external peripheral surface of main shaft 28, the cam path 24 being formed on the inner circumferential surface of hammer 22 and
These cam paths 24 and 26 are utilized to carry out the steel ball 25 engaged.
Hammer 22 is always pressed forward by spring 27, and when it is maintained at resting state, by steel ball 25 and cam path 24
And the joint between 26, it is arranged to there is gap with the end face of striking arm 21.Additionally, in hammer 22 and the phase the most each other of anvil 20
To Plane of rotation on two part at, the hammer pawl 23 serving as protuberance is formed with striking arm 21 with being mutually symmetrical.Work as main shaft
28 when being driven in rotation, and this is rotated through cam mechanism and is passed to hammer into shape 22, and before hammer 22 carries out half rotation, hammer 22
Hammer pawl 23 engages so that anvil is rotated with the striking arm 21 of anvil 20, and now, when by engaging repulsive force at main shaft 28 and hammer
Producing when rotating against between 22, hammer 22 starts the cam path 26 along cam mechanism towards motor 4 side while compression spring 27
Retreat.
When hammer pawl 23 is crossed striking arm 21 by the setback of hammer 22 thus released the engagement state of these two components
Time, the counteracting force of the elastic energy that hammer 22 is accumulated in by spring 27 and the counteracting force of cam mechanism and the rotation of main shaft 28
Turn moving forward by pressure by spring 27 while power is accelerated forward the most rapidly so that hammer pawl 23
Striking impact arm 21 forcefully, thus rotary 20.That is, anvil 20 is continually or intermittently rotated by hammer 22.Output shaft 18 is even
Receive anvil 20 side forward, in order to rotary impact power transmitted by being attached to the tip end tool 48 of the installing hole of output shaft 18
To screw.Thereafter, repeat identical rotation and blasting operation, and, such as, the fastening member of such as screw etc is screwed into all
In the component to be fastened of timber or the like, it has been not shown.It addition, in the present embodiment, due to by integrally becoming
Type technique produces output shaft 18 and anvil 20, is not result in rattle sound the most between the elements so that can realize
Have good rigidity and in terms of impact sound quiet percussion tool.Passing to output shaft 18 i.e., it is possible to reduce from hammer 22
The impact sound produced when passing rotary impact power.Additionally, due to simplify shape and the periphery of anvil 20 of anvil 20, therefore can reduce
The manufacturing cost of percussion tool 1.
Fig. 2 is the exploded perspective view representing the package assembly near the impact portion of Fig. 1.In the present first embodiment,
It is mounted with in mechanical percussion mechanism conventional use of anvil 20, will support by integrated output shaft 18 together with anvil 20 pivotally
Locking ring 38 on motor housing 2 and locking mechanism, the switching of this locking mechanism about whether anvil to be locked 20 relative to horse
Reach the state rotated against of outer housing 2, more specifically, relative to the state rotated against of locking ring 38.Locking mechanism is main
Consist of relief surface 20a in the part being formed at anvil 20, locking ring 38 and two and engage pin 37.Relief surface
20a is the plane formed in a part of the external peripheral surface of anvil 20.
In the case of hammer 22 is stopped and makes anvil 20 to rotate relative to motor housing 2, engage pin 37 and limit anvil 20 and lock
Determine rotating against between ring 38.The two engages pin 37 and all has a cylindricality, wherein, the centrage Y of each joint pin 37 with
The axis X keeping parallelism of output shaft 18.Locking ring 38 limits the output shaft 18 of carrier 33 and moves up in the side of axis X.This
Outward, in the present first embodiment, it is mounted with to serve as the holding of locking release component of the lock-out state for discharging locking mechanism
Carrier 33.Carrier 33 can relative to anvil 20 on the circumferencial direction centered by axis X in predetermined angular range inward turning
Turn.Carrier 33 is corresponding with the carrier component of the present invention.Engage pin 37 corresponding with the engagement member of the present invention.It is inserted in
Carrier 33 between locking ring 38 and anvil 20 has the cylinder centered by axis X.It addition, based on carrier 33 and two
Engaging the increase of pin 37, a part for the shape of each in hammer 22 and anvil 20 is changed.One-body molded at metal of hammer 22
Being produced in technique, to have predetermined quality, and it is coupled to main shaft 28 by cam mechanism.In the front side of hammer 22, fill
When the hammer pawl 23 of the first protuberance is formed in two parts in a circumferential direction.It is prepared to protuberance to form striking arm
Each hammer pawl 23 of 21 shock surfaces clashed into is prominent to extend forward, and it is provided with punching rotating forward on direction
Hitting surface 23a, and be provided with shock surface 23b in the reverse rotation direction, shock surface 23a and shock surface 23b is respectively
It is formed on two sides in a circumferential direction.In this manual, " direction will be rotated forward " at term to refer to such as
Tighten screw or the direction of bolt and on the premise of term " reverse rotation direction " refers to unclamp the direction of screw or bolt
Provide explanation.In each hammer pawl 23 of present embodiment, the shock surface 23c serving as the second shock surface is formed on impact
The inner circumferential side of surface 23a, and in an identical manner, shock surface 23d is formed on the inner circumferential side of shock surface 23b.
Second shock surface is prepared in a circumferential direction and recessed relative to cave on the impact direction of the first shock surface
Portion.
Anvil 20 is the component of hammer 22 shock, and in the present first embodiment, it has wherein output shaft 18 and is connected to anvil 20
The shape of tip side, and these components are produced by integral forming process.It addition, Fig. 2 schematically illustrates output shaft
18, eliminate in this diagram and through it, installing hole of tip end tool 48 be installed and be formed on radially to insert ball 43
Through hole.In this manual, term " radially " refers to the radial direction of the circle centered by axis X.Anvil 20 has cylinder form,
And on the external peripheral surface of anvil 20, define two striking arms 21 extended diametrically.These two striking arms 21 are
Two protuberances, and these two striking arms 21 are formed in the anglec of rotation centered by axis X the position of 180 degree of being separated from each other
Put place.Two striking arms stretch out to engage with hammer pawl 23 diametrically.Owing to it is as the character of component to be knocked,
Therefore striking arm 21 each has square column shape at it from the shape that anvil 20 extends.
The shape of striking arm 21 can have cylindricality or other simple shapes, if which ensure that to shock proof enough
Intensity and ruggedness.On two striking arms 21, the impact that form respectively two flat shapes stands surface 21a and 21b.
Surface 21a is stood forming impact forward in a surface centered by axis X in a circumferential direction, and at circumferencial direction
On another surface be upwardly formed impact stand surface 21b counter.It is being separated from each other two of main part of anvil 20 of 180 degree
At each in part, by becoming plane to form relief surface 20a one Partial Resection.
Locking ring 38 is arranged on the outer circumferential sides of output shaft 18.The major function of locking ring 38 is rotatably, pivots
Ground supports output shaft 18, and the sliding bearing being made up of metal etc. is integrally formed on the inner circumferential surface of locking ring 38.
The circumferencial direction of locking ring 38 is separated from each other in two parts of 180 degree, defines that to have the screw of cubic shaped convex
Platform 38b, and screw hole 38c is formed on the right and left side of each screw bosses 38b.In the present first embodiment,
By using locking ring 38 instead of using the cup-shaped hammer lid covered by the integral part of beater mechanism 19, output shaft 18 is fixed
On motor housing 2.Owing to motor housing 2 is formed two separate unit of right and left, therefore by use screw (not by
Illustrate) and from the external stability locking ring 38 of motor housing 2, output shaft 18 is pivotably supported and by outside right and left motor
Cover unit 2 is connected to each other.
The carrier 33 serving as locking release component has cylindrical as its basic configuration, and it is arranged on anvil 20
Outside radially and coaxial with anvil 20.Carrier 33 is not fixed on anvil 20, and is attached to anvil 20, with anvil 20
Tiny angle is relatively moved, i.e. relatively can rotate on axis on identical axis.Tiny angle and predetermined angle phase
Corresponding.Carrier 33 has cylindrical portion, and it has the internal diameter of external diameter of the cylindrical portion being substantially equal to anvil 20.In this case,
Between carrier 33 and anvil 20, maintain permission carrier 33 and anvil 20 rotates against thin low-angle gap.Additionally, holding
On carrier 33, at the rear portion of cylindrical portion, define multiple recess, more specifically, two recess (the second cut portion) 33a.Recess
At on the diagonal two parts that 33a is formed on the circumferencial direction of carrier 33.
The different position that cut portion 33b and each recess 33a are formed on along the direction of axis X.By cutting
Cut portion 33b is being formed except the end at locking ring 38 close along the direction of axis X of carrier 33.By excision carrier
33 along the direction of axis X near hammer 22 end and forming recess 33a.Additionally, on the circumferencial direction of carrier 33
Defining protuberance (the 3rd protuberance) 34, it is prominent from the edge (two ends) of two recess 33a diametrically.Each
The gap of two ends on the circumferencial direction of recess 33a is designed to than the width radially at striking arm 21 the most more
Wide.
In the present first embodiment, the cylindrical portion being formed on from anvil 20 due to two striking arms 21 separates 180 degree
On the outside of position, therefore protuberance 34 is formed in four positions standing surface with impact respectively relative.In other words,
Form protuberance 34 respectively corresponding to stand surface 21a and 21b with impact.In this case, term " corresponding " meaning
Placement position and the impact of protuberance 34 stand the placement position of surface 21a and 21b in the radial direction centered by axis X up to
A few part overlaps each other.Each protuberance 34 is and the extra shock surface 23c being additionally formed on hammer 22 and 23d phase
The part of contact, and by allowing these parts to be clashed into by shock surface 23c and 23d, thus it is possible to vary carrier 33 relative to
The position of anvil 20.Each protuberance 34 both is set to be associated with shock surface 23c.
In this case, term " corresponding " means placement position and the layout of shock surface 23c of protuberance 34
Position is overlapping each other the most at least partially centered by axis X.Relative position between carrier 33 and anvil 20,
That is, relative rotation angle, is about-10 or+10 degree.At each position relative with relief surface 20a of carrier 33, shape
Become to serve as cut portion 33b of the first cut portion.Cut portion 33b is formed on the diagonal on the circumferencial direction of carrier 33
At two parts.Each cut portion 33b is by excising into the peristome of the front side of the cylindrical portion of carrier 33 backward on edge
Spill on the direction of axis X is formed.The peristome of the front side of the cylindrical portion of carrier 33 refers to along carrier 33
Near the peristome of sleeve 41 on the direction of axis X.
Cut portion 33b is used for accommodating the space of each joint pin 37 for definition, and the inner circumferential side of cut portion is by anvil
Relief surface 20a of 20 covers.The outer circumferential sides of cut portion 33b is locked cylindrical portion 38d of ring 38 and covers.Cut portion 33b
The end difference 38e of the locked ring 38 in front side covers.Wall at the rear portion radially of cut portion 33b and two ends cut portion 33b
Portion covers.
In this way, it is allowed to each joint pin 37 is substantially synchronize with anvil 20 in by space defined in cut portion 33b
Roll.I.e., it is allowed to engage pin 37 and rotate on the circumference centered by axis X.Phase para-position between anvil 20 and carrier 33
Put when deviateing diametrically, engage pin 37 and serve as the locking mechanism rotated against for limiting between anvil 20 and locking ring 38,
And will be described in this action after a while.
Fig. 3 is the amplification view of the vicinity of the impact portion representing Fig. 1.As from Fig. 3 it is understood that carrier 33 sets
Put hammer 22 tip side, by make end thereafter be arranged to identical with the rearward end of striking arm 21 in the way of.Carrier 33
The front of top ends is supported by the end difference 38e of locking ring 38, and its outer circumferential sides is supported by cylindrical portion 38d, and its inner periphery
Side is supported by the external peripheral surface of anvil 20.There is the immediate vicinity that the installing hole 38a of cylindricality is formed on the rear end side of anvil 20, and
And in this hole, contain the installation axle 20b formed on the top of main shaft 28.
Owing to the rear end of anvil 20 and the front end of main shaft 28 are pivotally supported in the way of they seem to rotate relative to one another,
Therefore the impact portion with higher rigidity can be realized.Locking ring 38 has cylindricality, and locking ring 38 is attached to outside motor
Cover 2 is not to rotate.In order to avoid locking ring 38 and the frictional resistance engaged between pin 37 become higher, preferably along axis X
Direction on engage pin 37 top form tiny contact area, such as protuberance.It should be noted that O 39 is attached to
Axle receiving portion 38a of locking ring 38, to avoid lubricating oil to leak from beater mechanism portion.
In order to insert tip end tool 48, there is in the plane vertical with axis X the installing hole 18a of hexagonal cross-section by shape
Become the top end at output shaft 18.The installation portion 40 of tip end tool 48 is formed on the tip side of output shaft 18.At output shaft 18
Side on formed and accommodate the through hole 18b of ball 43 being moved in, and it is formed to avoid ball 43 from through hole
18b departs from and falls the shape of inner circumferential side.Ball 43 outside diametrically is supported by sleeve 41, and this groove 41 is existed by spring 44
Exert a force on it.Packing ring 42 is attached to the inside of sleeve 42, and packing ring 42 is supported by C-shaped ring 45 with not in the direction along axis X
Upper movement.
When tip end tool 48 being attached to output shaft 18 or dismantling from output shaft 18, the force of spring 44 resisted by sleeve 41
And along the direction of axis X, i.e. on the direction leaving locking ring 38, leave the normal position shown in Fig. 3 and move.
When sleeve 41 moves, by the outer circumference portion of ball 43 from the state that the convex surface formed with the inner circumferential side at sleeve 41 docks
Release, in order to owing to allowing ball 43 radially toward outer side shifting, perform top work with therefore can not having any resistance
The attachment of tool 48 or unloading process.It addition, in a part of motor housing 2, i.e. in the downside of output shaft 18, formed and use
In the LED 47 at tip end tool side's up ligthing.Power supply is supplied to LED 47 by power line 49.
Fig. 4 is to represent axonometric chart near the impact portion of Fig. 1, after its assembling process.Fig. 4 represents does not has motor
Outer housing 2 is attached to state thereon, to explicitly indicate that position relationship.In the state of this assembling, as depicted in the figures go out
, when observing diagonally, invisible carrier 33, and this shape is substantially identical with existing percussion tool.But, at this
In first embodiment, by using carrier 33 and two to engage pin 37, can perform specifically to operate.At accompanying drawing subsequently
In, by using sectional view and the sectional view of B-B part of A-A part, the impact work according to this first embodiment will be described
The operation of tool 1.In this case, the section of A-A part refers to be passed through transversely formed two spiral shells of locking ring 38
The plane of hole 38c, and it is corresponding to the section vertical with axis X.The section of B-B part refers to the center through hammer pawl 23
With the plane of striking arm 21, and it is corresponding to the section vertical with axis X.
Fig. 5 is the enlarged partial sectional view of the shape representing hammer and carrier according to the embodiment of the present invention, and
It is corresponding with the sectional view of the B-B of Fig. 4 part.Arrange two at diagonal angle in a circumferential direction hammer pawls 23 be designed to except
Oval circumferencial direction is positioned at outside two shock surface 23a and 23b of outer circumferential sides, also increases in inner circumferential side and formed
Two shock surface 23c and 23d.Here, form shock surface 23a and 23b to stand surface 21a and 21b with striking impact, and
And it has the function identical with the hammer pawl used in existing percussion tool, and it the most also has identical basic configuration.
Shock surface 23c and 23d is for pressing the protuberance 34 of carrier.
As from the position relationship of Fig. 5 it is understood that during trip bolt, when rotary hammer 22, rushing of hammer pawl 23
Hit the surface 23c impact first with protuberance 34 to stand surface 34a and contact.In Figure 5, the direction of rotation of hammer 22 is counterclockwise
Direction.As described earlier, carrier 33 and striking arm 21 can relatively move tiny angle, only allow shock surface
23c promotes impact to stand surface 34a, and its not as striking face 34a the strongest.As the anglec of rotation of hammer 22, will be thin
Low-angle is set to about 20 degree.
After this state, when rotating carrier 33 counterclockwise when the rotation by hammer 22, the shock surface 23a of hammer 22
Impact with striking arm 21 stands surface 21a collision or engages.In this collision, due to the repulsion from component to be tightened
Power is transferred to output shaft 18 integral part of with anvil 20 from tip end tool 48, and therefore this collision becomes thump.Fig. 5 represents when punching
Hit surface 23a and impact stands state when surface 21a is engaged with each other, and prepared for such structure to exist at this moment
Predetermined gap is produced between protuberance 34 and striking arm 21.
In other words, the distance that the impact at striking arm 21 stands between the shock surface 23c of surface 21a and hammer pawl 23 is
" a " relevant with the thickness " b " of protuberance 34 in a rotational direction, and the relation of a and b is a ＜ b.By using this structure, by
In when it is given impact, or when rotating before the installation process of bolt etc., the power of hammer pawl 23 is applied directly to impact
On arm 21, therefore, moment of torsion transmission is not contributed by carrier 33, thus does not results in produce due to the insertion of carrier unfavorable
Consequence.Additionally, due to do not transmit strong impact force to carrier 33, the impact to carrier 33 transmission therefore can be reduced, thus
Provide longer service life.
It follows that with reference to Fig. 6, will be given for by driving percussion tool 1 to perform to fasten the description of the state of work.Figure
6A to 6D is illustrated respectively in the section of B-B part in the section of the part of A-A in the Fig. 4 being transversely arranged side by side and Fig. 4, and
In this case, hammer 22 is driven by motor 4.Hammer 22, anvil 20, carrier 33 and companion's component respectively along with them are with rotation
Some assemblies for convenience of description, are only provided reference by (disymmetry) group rotated symmetrically centered by rotating shaft.
Carrier 33 clamps the striking arm of anvil 20, and it is also equipped with protuberance 34 and stands surface 21a and 21b with the impact with anvil 20
There is predetermined gap, in order to be constrained to the pivoting angle of carrier 33 in predetermined scope.
Fig. 6 A represents the state that hammer pawl 23 is separated from one another with striking arm 21, i.e. such as, starts shape when rotating at hammer 22
State.According to the state in Fig. 6 A, transmitted the revolving force of motor 4 to main shaft 28 by the reducing gear 10 shown in Fig. 1, in order to permit
The hammer 22 being permitted to be supported by cam mechanism rotates up in the side of arrow 61.Here, in the position of striking arm 21, i.e. the rotation of anvil 20
Position relationship between gyration, and the protuberance 34 of carrier 33 is as shown in the drawings.
Additionally, go out as shown in FIG. 2, it being provided with protuberance 34, this protuberance 34 is diametrically from each carrier
Stretch out near two sides on the circumferencial direction of the recess 33a of 33.Striking arm 21 and protuberance 34 keep stable, prominent
Predetermined gap 62 and 63 has been prepared between portion 34 and striking arm 21.As by shown in Fig. 6 A, the axle portion of anvil 20, i.e. output shaft 18,
Within being contained in the cylindrical portion of each carrier 33, and engage pin 37 be arranged on each cut portion 33b inner space it
In.In this case, carrier 33 and anvil 20 are simply secured on it, and by arranging their shape, they are set
Count into and only relatively rotate tiny angle.
Fig. 6 B represents and starts state when rotating at carrier 33, and wherein hammer 22 revolves the most further
Turn, in order to make the shock surface 23c hammering pawl 23 into shape stand surface 34a with the impact of protuberance 34 and contact.When by driving motor
When making hammer 22 rotate, hammer 22 was made to contact with carrier 33 before rotating to impact anvil 20, in order to allow carrier 33 to rotate.By
In this reason, the shape of each hammer pawl 23 both is set to, when making shock surface 23c contact with each protuberance 34, not make
Shock surface 23a contacts with striking arm 21.When further rotating from this state, as shown by the figure on the right side at Fig. 6 C,
Hammer pawl 23 allows while making the carrier 33 side at arrow 65 rotate up so that shock surface 23a and striking arm 21
Impact stands surface 21a contact.
That is, anvil 20 is impacted.As above with reference to described by Fig. 5, the impact at anvil 20 stands surface 21a and 21b with prominent
Go out and there is gap between portion 34.In other words, as by shown in the thick line in Fig. 6 C, owing to there is gap 67, therefore avoided and hold
Carrier 33 impacts striking arm 21.Additionally, now so that gap 66 is more than the gap 62 shown in Fig. 6 A.In this way, when inciting somebody to action
When each carrier 33 rotates tiny angle both relative to striking arm 21, as shown in the view in the left side at Fig. 6 C, because of
This makes edge part contact with the outer circumference portion engaging pin 37 on the circumferencial direction of cut portion 33b of each carrier 33, its
Result is to engage pin 37 to be promoted as retreating the immediate vicinity to relief surface 20a formed on the circumferential surface of anvil 20.Hammer
22 impact anvil 20 while making carrier 33 rotate, and rotation is transferred to top end shaft line side.Anvil 20 rotates and simultaneously engages with pin
The inner circumferential side of 37 contacts with relief surface 20a, but, contact site, i.e. the line portion parallel with axis X, the most greatly
Cause to be maintained at the center of relief surface 20a.
Fig. 6 D is the view representing and hammering 22 states rotated further from the state shown in Fig. 6 C into shape.In this situation
Under, the shock surface 23a of hammer pawl 23 promotes or the impact of striking impact arm 21 forcefully stands surface 21a, in order to rotary
20.Now, remain engaged with pin 37 to contact with the edge part of cut portion 33b of each carrier 33.For this reason, pin is engaged
37 inner surfacies not disturbing locking ring 38.Additionally, rotary components, i.e. anvil 20, carrier 33 and joint pin 37, can be by hammer 22
Rotate continuously, maintain relative position relationship.I.e., it is possible to avoid carrier 33 to rotate energetically and cause by carrying
Each joint pin 37 that frame 33 rotates collides with the end of locking ring 38 and relief surface 20a of anvil 20.In addition it is also possible to avoid
Hammer 22 is fallen in the gap between anvil 20 and carrier 33, and thus avoids positively rotating carrier before the rotation of anvil 20
33。
Fig. 7 A and 7B be described at the A-A profile position of Fig. 4, anvil 20 regards with the position relationship engaged between pin 37
Figure.As shown by figure 6d, during hammer 22 rotation, the shock surface 23a of hammer pawl 23 is to promote the impact of striking arm 21
Stand the mode rotary 20 of surface 21a, in order to maintain the anvil 20 gone out as shown in Figure 7A to close with the position engaged between pin 37
System.In this case, during each joint pin 37 is located substantially in the vertical direction (circumferencial direction) of relief surface 20a
The heart.I.e., it is assumed that the width in the vertical direction of relief surface 20a (circumferencial direction) is 2c, anvil 20 with engage connecing between pin 37
Contact 72 is positioned at position and the position of distance bottom " c " of distance top " c ".In this state, R1 is utilized to represent from rotation
Turn the center 71 maximum distance to the external peripheral surface engaging pin 37.R1 is expressed as described:
R1=(radius of anvil 20)-(resection of relief surface 20a)+(engaging the diameter of pin 37)
In the present first embodiment, by R1 being set smaller than the internal diameter of cylindrical portion 38d of locking ring 38 so that connect
Dowel pin 37 is not intended to anvil 20 and the rotation of carrier 33.
It follows that with reference to Fig. 8 A to 8C, following description will illustrate a state, in this condition, in the rotation stopping motor 4
After Zhuaning, the tip end tool 48 being fixed to unshowned head of screw by utilization carrys out rotary impact tool 1, and workman is to drive with screw
The mode manually trip bolt etc. that dynamic device is identical, i.e. manually fasten work.Fig. 8 A is to represent make percussion tool 1 self revolve
The state of the eve turned, i.e. the sectional view of neutral position.Fig. 8 A to 8C represents A-A portion in the Fig. 4 arranged laterally side by side respectively
The section divided and the section of B-B part.It addition, when performing manually fastening work, owing to not using hammer 22, the therefore rotation of hammer 22
Indexing is put inessential, and the position of the hammer 22 shown in Fig. 8 A to 8C is only exemplary description, and it the most specifically has
Meaningful.In fig. 8 a, workman's rotation motor outer housing 2 is to perform manually to fasten work.By rotation motor outer housing 2, it is allowed to lock
Determine ring 38 to rotate up in the side of arrow 81.Therefore, at A-A profile position, make striking arm 21 enter with arrow 81
State identical by relatively rotating tiny angle on direction in opposite direction.
It follows that when workman go out as seen in fig. 8b when further rotating percussion tool 1, the impact of striking arm 21 stands
Surface 21a adjoins with each protuberance 34.Therefore, change the relative position relation between carrier 33 and anvil 20, and from
And change relief surface 20a and the relative position relation engaged between pin 71 formed on anvil 20.Fig. 7 B shows at this
Change in relative position relation.In figure 7b, when anvil 20 as by indicated by arrow 73 when rotating against, make joint pin 37 enter
Enter and sell in the position relationship that the position relationship relatively moved on the direction of arrow 74 is identical with engaging.But, only anvil
20 sides are moved and to engage pin 37 un-shifted.Therefore, make position that each joint pin 37 and relief surface 20a contact with each other from
The contact point 72 of Fig. 7 A moves to the contact point 75 of Fig. 7 B.That is, the center of relief surface 20a and each joint pin 37 points
From.The center of relief surface 20a is corresponding with the center on the circumferencial direction of anvil 20.Therefore, the rotation from anvil 20 of Fig. 7 A
Center 71 changes to R2 to the maximum distance of the external peripheral surface of each joint pin 37 from R1.As from accompanying drawing it is understood that
For R2, meet position relationship R1 ＜ R2, in order to meet R1 ＜ Rc ＜ R2 by the size arranging the internal diameter Rc of locking ring 38
Relation, utilize as shown in fig. 7b go out each joint pin 37 relative position relation in change, it is allowed to each joint
Between the end of relief surface 20a that pin 37 clamp-ons locking ring 38 and anvil 20, and locking ring 38 and anvil 20 form integrated unit
And serve as the locking mechanism of output shaft.That is, in the case of rotating, workman, the percussion tool 1 not driven, due to the rotation by anvil 20
Turn and be maintained at lock-out state, therefore can efficiently perform and manually fasten work.
It should be noted that in addition to by rotary impact tool 1 trip bolt etc., when performing release process, anvil 20
Rotation be also locked.Fig. 8 C shows this state, and locks the rotation of anvil 20 in the same way, only in the rotation with Fig. 8 B
Turn relief surface 20a causing being formed on anvil 20 in direction of rotation in opposite direction and the relative position engaged between pin 37 is closed
The deviation of system.As described above, in the present first embodiment, when passing through rotary impact tool 1 after stopping motor 4
When performing manually fastening work, by the effect of locking ring 38, anvil 20 is locked into non-rotatable relative to locking ring 38, in order to
Realize output shaft lock function.Therefore, even if in the case of power tool is used for performing to impact fastener cycle, it is also possible to easily
Ground performs manually to fasten work.Even if additionally, by using driving source to transfer to manually fasten work by work from fastening work
In the case of work, do not need such as by workman to pull operation of bar etc. etc particularly operation, and only need simple
Ground rotary impact tool 1, in order to the most convenient power tool used can be realized.
After completing described manual fastening work, in the case of the execution fastening for next screw, pass through
Pull trigger 6 to make motor 4 rotate.In that case, as shown by Fig. 6 A to 6C, carried owing to hammer pawl 23 promotes
Each protuberance 34 of frame 33, therefore engages pin 37 and the relative position of anvil 20 is returned to the position of Fig. 7 A, and it is brought into
Free state, i.e. locks release conditions.For this reason, the fastening work identical with existing fastening work can be performed, and
Do not give by using the normal fastening work of motor 4 to bring any negative consequence.
As described above, according to the percussion tool 1 of this first embodiment, anvil 20 and output shaft 18 are produced as one
The structure of individual one, and achieve output shaft locking machine in this structure only by carrier 33 and joint pin 37 being increased to
Structure.Therefore, it can simplify the shape of anvil 20 and also the impact energy of hammer 22 is effectively transmitted to tip end tool 48.Specifically
Ground, owing to anvil 20 and output shaft 18 form separable structure, and owing to need not connected structure, therefore can subtract significantly
Few by using hammer 22 impact and standing to be produced when surface 21a and 21b rotates to output shaft 18 transmission from the impact of anvil 20
Collision sound and vibration.Additionally, due to percussion tool 1 can be bent centered by pivot axis 8, therefore when main by making
Body rotates when performing fastening work, can apply higher moment of torsion.
Additionally, explanation is being twisted from the state that locking ring 38 and output shaft 18 are fixed by following description when output shaft 18
In order to be performed the process of fastener cycle by motor 4 when tight side rotates up, i.e. make output shaft 18 contrary with manual tightening direction
The process that rotates up of side.In this case, when making hammer 22 rotate to adjoin with carrier 33, release outer housing 2b with
Lock-out state between output shaft 18.Therefore, there is no need to attempt manual by use the lock function of output shaft 18 to carry out
Fastening work and the switching by the work between the fastening work of use motor 4.By this way, at this first embodiment
In, it is not necessary to operation output shaft locking switch etc., by completing fastener cycle and motor is stopped and makes percussion tool 1 main body afterwards
The tightening direction of fastening member rotates, extra rundown process and the confirmation of tightening state of fastening member can be performed.
Embodiment 2
It follows that with reference to Fig. 9, following description will illustrate second embodiment of the present invention.Utilize identical accompanying drawing mark
Note indicates the assembly identical with the assembly of the first embodiment, and owing to being structurally and operationally identical, therefore will omit
Repetitive description.Second embodiment and the different of the first embodiment are, use ball bearing 141 to replace hardware
It is pivotally supported output shaft 118.Although according to its shape, the shape of locking ring 138 is also changed, but, the part being changed
It is limited near its top, and is used for supporting the shape of cylindrical portion 138d engaging pin 37 and screw bosses portion and screw
These of the size and dimension of (having been not shown) and the locking ring 38 represented in fig. 2 are identical.Additionally, the top of motor housing 102
The shape of end is varied slightly with rotating bearing ball bearing 141.Additionally, also be designed to define at circumference by output shaft 118
The groove 118c extended continuously on direction, to avoid ball bearing 141 to depart from forward on the axis X direction of ball bearing 141,
And locating snap ring 142 is attached to groove 118c.As by indicated by the second embodiment, carried out pivot by use ball bearing 141
Turn ground and support output shaft 118, it is possible to achieve there is higher stiffness and can the percussion tool of Smooth Rotation.
According to the present invention, it is provided that such structure, wherein, when hammer rotates, before engaging with the second protuberance, the
One protuberance engages to discharge the locking of locking mechanism with locking release component, and its center dant is used for being contained in the first protuberance
A part for the locking release component formed, therefore, when hammer rotates, first discharges the locking of locking mechanism so that anvil can revolve
Turn.For accommodate locking release component recess be arranged on the second protuberance of anvil side in the case of, when its from second dash forward
When going out the axle portion that portion comes the inner side being positioned at radially, the rigidity of anvil is lowered, but, due to the first protuberance on hammer side
Provide recess, therefore can suppress the reduction of anvil rigidity, and the most effectively transmit the impulsive force of hammer.
According to the present invention, thin low-angle carrying framework can be rotated in same axis relative to anvil owing to defining
Part, due to define in the part at the external peripheral surface of anvil flat shape relief surface and due to carrying framework
The cut-out of part provides the engagement member rotated against for limiting between anvil and locking ring, therefore can utilize simple
Structure realize the locking mechanism for output shaft.Furthermore, it is possible at the basic knot changing existing anvil and output shaft the most in a large number
Output shaft locking mechanism is realized, in order to moment of torsion can be efficiently transferred to tip end tool in the case of structure.Additionally, by making
Perform after carrying out tightening operation with power tool extra tighten work in the case of, can hold by using power tool
This work of row.
According to the present invention, it is separately positioned on one by one owing to being each prepared to the engagement member of cylindrical component
Cut portion, the centrage of the most each engagement member is arranged to parallel with the axis X of output shaft, it is hereby ensured engaging zones
There is relatively large size and thus locked the anvil rotation relative to outer housing firmly.
According to the present invention, hammer rotate stop during in the case of anvil rotates relative to outer housing, due to anvil and locking ring it
Between rotate against and limited, therefore without the special operation for locking output shaft, in order to can provide have higher can
Operability and higher reliability and be not resulted in the power tool of faulty operation.
According to the present invention, rotating against between carrier component and anvil goes above predetermined angle and makes relief table
When the center in face separates with engagement member, create lock-out state, therefore, it is allowed to outside workman is by slight rotation simply
Cover main body and lock output shaft easily, wherein tip end tool is forced on component to be tightened.
According to the present invention, during the rotation of driver element, due to by allowing engagement member and carrying to be moved
Frame member contacts, and engagement member is supported for being positioned at the center of relief surface, therefore, it can make outer housing and output shaft freedom of entry
Idling conditions, and therefore it is not resulted in any problem by using driving source to perform normally to fasten work.
According to the present invention, the edge that has diametrically from the circumferencial direction of the second cut portion due to protuberance is prominent
Shape, therefore by using hammering blow surface that carrier component can be made to rotate relative to anvil easily, and owing to need not
Distance between extension anvil and locking ring, to arrange carrier component, therefore can realize output shaft locking mechanism and be not resulted in group
Fill the relatively low of efficiency.
According to the present invention, owing to hammer is provided with the first shock surface for impacting anvil and contact the with carrier component
Two shock surfaces, therefore the shape by simply changing the claw of hammer can impact two components, i.e. anvil and carrying framework
Part.
According to the present invention, when hammer rotates, first the second shock surface adjoins carrier component, and following first punching
Hit surface contiguous anvil: therefore, it can before beaten anvil by hammering moving bearing bracket component immediately, in order to can positively discharge
The lock-out state of output shaft.
In description above, have been based on the second embodiment and describe the present invention.But, the invention is not restricted to this reality
Execute mode, and it can be carried out the various amendment purport without departing from the present invention.Such as, by the impact work of mechanical system
Tool citing describes the second embodiment as power tool, however, it is possible to apply the present invention to oil arteries and veins in an identical manner
Flushing system.Additionally, be not limited in percussion tool, it is also possible to apply the present invention to driver in an identical manner and bore.
Embodiment 3
With reference to accompanying drawing, following description will illustrate third embodiment of the present invention.It addition, in accompanying drawing subsequently, profit
Indicate identical part by identical reference, and repetitive description will be omitted.In this manual, will longitudinally and
Explanation is given on the premise of horizontal and indicated in accompanying drawing direction is corresponding.Figure 10 is to represent according to the present invention the 3rd embodiment party
The sectional view of the integral part of the percussion tool 201 of one example of the power tool of formula.Go out as shown in Figure 12, impact
Motor 204 that instrument 201 includes arranging in coaxial fashion centered by axis X, reducing gear 214, anvil 220, output shaft
218, hammer 222, main shaft 228, bearing 229a, locking ring 238 and installation portion 240.Output shaft 218 is supported by bearing 229a with certainly
Pivoted thereon by ground.Along the direction of axis X, between installation portion 240 and motor 204, it is provided with reducing gear 214, anvil
220, output shaft 218, hammer 222, main shaft 228, locking ring 238 and bearing 229a.Along the direction of axis X, bearing 229a sets
Put between installation portion 240 and locking ring 238.
Percussion tool 201 utilizes chargeable and that be removably attached set of cells 250 as power supply, and uses motor
204 serve as driving source revolving force and impulsive force are applied to output shaft by Poewr transmission mechanism, in order to by revolving force and punching
The power of hitting is delivered to such as be supported in the tip end tool of the driver bit in the installing hole being coated with installation portion 240, in order to hold
The work of row such as screw fastening or tightening process for a bolt etc.The outer housing of percussion tool 201 is organized into main outer housing (outside front
Cover) 202 and handle outer housing (rear outer housing) 203.Main outer housing 202 is by the one-body molded work of the polymer resin of such as plastic material etc
Skill is formed, and it is organized into the most separable two unit, and the screw being had been not shown by use fixes right list
First and left unit.Handle outer housing 203 is formed cylinder substantially or the cylinder in its back-end with opening 203a, and
It produces and is manufactured into horizontal separable unit by the integral forming process of the polymer resin of such as plastic material etc.
The privot mechanism with pivot axis that main body outer housing 202 and handle outer housing 203 pass through to have been not shown is on the direction of front to back
Near core coupled to each other, and it is allowed to centered by pivot axis pivot about 70 degree.When in Fig. 10
During observation, this be pivoted motion plane with include forward and backward directions and up and down direction plane (with
The plane that the plane of paper is identical) corresponding.Therefore, go out as shown in Figure 10, main outer housing 202 and handle outer housing 203 from
They are disposed side by side so-called rectilinear shape on the same axis and are changed to so-called gun shaped shape, wherein, as
Shown by figs. 11 and 12, main outer housing 202 and handle outer housing 203 pivot centered by pivot axis 209.According in order to hold
The working site of this work of row and work purpose, workman can be set to linear type or gun shaped.
The percussion tool 201 of this 3rd embodiment is to use known beater mechanism as the power work of Poewr transmission mechanism
Tool, can be implemented as so-called driver and be bored and other power tools of cordless system, such as, and electric tool and tightening
Instrument.Motor 204 is accommodated in the inside of main outer housing 202, and its rotary shaft is connected to Poewr transmission mechanism for making top
Ending tool rotates.Forming set of cells 250 with so-called boxlike style, it serves as can be by light easily changeable power supply, and it is provided with
Having cylindrical housing substantially, this housing is passed through the opening 203a of handle outer housing 203 end and is attached to handle outer housing
The inner space of 203 or dismantle from the inner space of handle outer housing 203.Two plug pin portion 251a are formed into set of cells 250
Housing, and they engage with the recess (having been not shown) on the inwall being formed at handle outer housing 203, in order to support pack
250.In order to dismantle set of cells 250, while pressing is formed at the plug pin portion 251 on two positions of right and left, by set of cells
250 pull back through opening 203a.The shape of the rear end of set of cells 250 is formed to cover the opening of handle outer housing 203
203a, wherein a part for the outer rim of the handle outer housing 203 formed behind of set of cells 250.Many at set of cells 250 inner containment
Individual lithium ionic cell unit, and the size of battery, quantity etc. can be set alternatively.
The trigger 206 at the inner containment that the space of the part adjacent with privot mechanism of handle outer housing 203 is corresponding
With forwards/reverse selector bar 208, trigger 206 (is led for operating the switch controlling motor 204 is supplied/stopped power supply and is opened
Close), forwards/reverse selector bar 208 is for the direction of rotation of switching motor 204.In this 3rd embodiment, open as main
Closing, the amount of pulling according to trigger 206 that employs changes the so-called variable resistance switch of its resistance value, in order to according to trigger
The operational ton of 206 changes the revolution of motor 204.Trigger 206 has finger pad portion 206a, and this finger pad portion 206a has width
Enough a finger is placed on width thereon, and its be arranged by allowing on front side of with axle point, (shake axis will be
Be described later on) centered by shake (pivot) predetermined angular, the rear end of trigger 206 be allowed in longitudinal direction substantially shake.Just
It is provided substantially on the pivot axis of trigger 206 to/reverse conversion bar 208.Forwards/reverse selector bar 208 be for
The direction of rotation of switching motor 204 between " rotating forward direction (tightening direction) " and " reversely rotating direction (unclamping direction) "
Permutator, and this switch operates by sliding laterally bar.
Handle outer housing 203 is used as the grip part mainly grasped by workman, and it is designed to have so that when by work
Be suitable for the shape of the hands of workman when people grasps, and elastic component 213a and 213b be formed at handle outer housing 203 upside and under
Side.It addition, in this manual, in the case of the direction mentioning handle outer housing 203, unless otherwise specified, otherwise, such as Figure 10
Shown in, carry out direction indication based on the state that percussion tool 201 is placed in linear state.Elastic component 213a and 213b quilt
Be formed as using the composition material of handle outer housing 203, such as, there is composition material more elastomeric than the elasticity of plastic material, and
And it is by using such as two-layer forming technique to be prepared to wherein have the group of the handle outer housing 203 of the resin of higher elasticity
Become the thin skin layer in the lower floor of component.Opening 203a on the downside of handle outer housing 203 has been formed about dog hole 248, is used for hanging
Rope etc. insert through this dog hole 248.
Sometimes, main outer housing 202 is grasped in the way of assistance by workman, and due to this reason, at the table of main outer housing 202 side
Elastic component 211 is also form on face.Elastic component 211 is formed to use the composition material of main outer housing 202, such as, have ratio
The more elastomeric composition material of elasticity of plastic material, and it is by using such as two-layer forming technique to be prepared to wherein
Thin skin layer in the lower floor of the composition component with the main outer housing 202 of the resin of higher elasticity.Additionally, pass through aided design for elastic component
The shape of the specific region of 211, anti-slip part 211a and 211b are partly formed to allow when it is grasped by workman, and workman is light
Change places and exerted a force on main outer housing 202 by the finger grasped.Such as, anti-slip part 211a and 211b are formed to be formed at bullet
Multiple little recess on property component 211.Owing to the purpose of anti-slip part 211a and 211b is to prevent hands from sliding, therefore anti-slip part
211a and 211b is possible not only to be formed recess, and can also be formed protuberance, groove, ladder etc..Lid 246 is arranged on
The downside of pivoting centre, at this pivoting centre, main outer housing 202 and handle outer housing 203 bend each other.Downside refers to outside master
Space that formed between cover 202 and handle outer housing 203, that there is relative narrow-angle.Lid 246 is plate type member, and it is in impact
Instrument 201 is used in pattern as shown in Figure 10, i.e. serve as outside framework component in the case of linear state, should
Outside framework component covers space between main outer housing 202 and handle outer housing 203, near privot mechanism portion.
Figure 11 be represent when percussion tool 201 as shown in Figure 10 in the bent state time the side-looking of mode of operation
Figure.In the bent state, main outer housing 202 and handle outer housing 203 are provided with the intersecting angle of about 70 degree, to have so-called rifle
Type form (handgun shape).The protuberance 212 highlighting distance " H " is formed at the downside of main outer housing 202 so that highlighted by this
Portion 212, the finger of workman, such as forefinger are directed into the center of the finger pad portion 206a of trigger 206 naturally.Owing to triggering
Device 206 is operated by pulling of the forefinger of workman easily, therefore can perform the variable speed drive behaviour of motor 204 easily
Make.
Figure 12 is the view of the internal structure representing percussion tool 201.Percussion tool 201 utilizes to be supplied from set of cells 250
Electric energy, and make the motor 204 serving as driving source rotate.Set of cells 250 has so-called box structure, and it can pass
The opening 203a of the end of handle outer housing 203 and be attached to inner space and dismantle from inner space.Two plug pin portion
251a is formed in set of cells 250, and they connect with the recess (having been not shown) formed on the inwall of handle outer housing 203
Close.Three lithium ionic cell units (having been not shown) are accommodated in the inside of set of cells 250, and its rated voltage is configured to
10.8V DC voltage.The other end at the installing space of the set of cells 250 being connected to opening 203a forms substrate 254, and
Multiple terminals 253 are to install in the way of opening 203a extension from substrate 254.Leading section (upper in figure in set of cells 250
Side), it is provided with multiple terminal 252, and makes terminal 252 by set of cells 250 is attached to handle outer housing 203 and at substrate
The terminal 253 that 254 sides are formed contacts.
The rotation of motor 204 is decelerated mechanism 14 and slows down and be passed to beater mechanism 219.In the present embodiment,
Reducing gear 214 and beater mechanism 219 form Poewr transmission mechanism so that the revolving force of motor 204 is passed to main shaft 228.
Main outer housing 202 and handle outer housing 203 are allowed to centered by pivot 209 pivot about 70 degree, and Figure 12 illustrates them
For linear state.Main outer housing 202 is formed by the moulding process of the synthetic resin of such as plastics etc, so that it is divided into
Two elements of right and left, and the screw being had been not shown by use fixes right and left unit.For this reason, multiple spiral shells
Nail boss 230a to 230d is formed in one of them of the element that forms main outer housing 202, and formation on other elements
Multiple screws.Multiple screw bosses 231a and 231b are formed on handle outer housing 203 in an identical manner.It should be noted that
In the power tool of this 3rd embodiment, beater mechanism 219 and reducing gear 214 are received directly in by synthetic resin system
In the main outer housing 202 become, but, they may be accommodated in the most cup-shaped housing (hammer housing) being made of metal,
And formed by integral forming process, and in housing may be accommodated in main outer housing 202 or be connected to main outer housing 202.
Trigger switch 207 permission workmans and pull trigger 206, in order to produce open mode or closed mode, and with
Trigger 206 is made to shake centered by the shake axis 210 that front side is formed.Trigger switch 207 and there is rotary sampling switch mechanism, and
And by operation forwards/reverse selector bar 208, output shaft can be switched on forward (tightening direction) or reverse (unclamping direction)
The direction of rotation of 218.It is prepared to for adjusting horse according to the amount of pulling of trigger 206 it should be noted that trigger switch 207
Reach the variable power switch of the revolution of 204, but, it can also be prepared to simple off/on switches.At installation portion 240
Below, being mounted with the LED 247 for illuminating front portion, this front portion includes component to be tightened.
Reducing gear 214 is provided with multiple planetary gear 216, by the rotary shaft of these planetary gear 216 motors 204
204a is connected to central gear 215, and multiple planetary gear 216 engages with the internal gear 217 being positioned at outer circumferential sides, with
The most multiple planetary gears 216 can rotate around central gear 215 while rotating.Main shaft 228 is for making hammer 222 rotate
Component, and main shaft 228 rear end side support multiple planetary gears 216 to rotate thereon.That is, main shaft 228 serves as carrying
Frame.That is, the rotatory force of planetary gear 216 defines the revolving force of main shaft 228.Main shaft 228 is coupled to serve as by cam mechanism
The hammer 222 of drive member, and this cam mechanism be organized on the external peripheral surface of main shaft 228 formed V-arrangement cam
Groove 226, the cam path 224 formed on the inner circumferential surface of hammer 222 and the steel ball 225 engaged with cam path 224.
Hammer 222 is always exerted a force on the direction close to bearing 229a by spring 227.When hammer 222 is maintained at resting state
Time, by the joint between steel ball 225 and cam path 224 and 226, hammer 222 is positioned at the end face of distance striking arm 221 and has gap
Place.Additionally, hammer 222 with anvil 220 each other relative to Plane of rotation on two parts at, be mutually symmetrical landform
Hammer pawl 223 and the striking arm 221 of protuberance are become to serve as.When main shaft 228 is driven in rotation, by cam mechanism by revolving force
Be transferred to hammer into shape 222, and before making hammer 222 half rotate, the hammer pawl 223 of hammer 222 is engaged with the striking arm 221 of anvil 220 with
Just anvil 220 is made to rotate, and now, when by joint repulsive force, between main shaft 228 and hammer 222, generation rotates against, hammer
222 cam paths 226 started while compression spring 227 along cam mechanism retreat to motor 204.
When hammer pawl 223 is overcome the impact of striking arm 221 by the setback of hammer 222 and thus released two components
During engagement state, hammer the action of 222 elastic energies accumulated in by spring 227 and cam mechanism and the rotation of main shaft 228 into shape
Power is moved forward by the force of spring 227 while the most quickly accelerating, in order to by allowing hammer pawl the last 223
Effectively striking impact arm 221 makes anvil 220 rotate.In this way, anvil 220 is continually or intermittently rotated by hammer 222.
Output shaft 218 is connected to the front side of anvil 220, in order to (do not shown by being attached to the tip end tool of the installing hole of output shaft 218
Go out) rotary impact power is delivered to screw.Thereafter, repeat identical rotation and blasting operation, and, such as, by such as screw
Etc fastening member screw in the component to be fastened of such as timber etc, this component has been not shown.It should be noted that
In this 3rd embodiment, owing to producing output shaft 218 and anvil 220 by integral forming process, therefore, between the elements
Be not resulted in rattle sound so that can realize having good stiffness and in terms of impact sound quiet percussion tool.
Figure 13 is the exploded perspective view representing the package assembly near the impact portion of Figure 12.At this 3rd embodiment
In, improve the fixed structure of the locking ring 238 of supporting carrier 233, this carrier 233 output shaft to be attached to 18.Position
Carrier 233 in the inner circumferential side of locking ring 238 is organized into two individual member 233a and 233b of right and left.Component 233a
It is the first carrier component and component 233b is the second carrier component.In anvil 220, define centered by axis X
Radially extending two striking arm 221 of circle, and anvil 220 and output shaft 218 be integrally formed.Locking mechanism be for
Locking anvil 220 relative to main outer housing 202, more specifically, relative to the mechanism of rotation of locking ring 238.Locking mechanism mainly wraps
Include relief surface 220a that formed in a part for anvil 220, carrier 233, locking ring 238 and two engage pin 237a and
237b.Two engage pin 237a and 237b and are formed independent component.The two engages pin 237a and 237b and all has cylindricality,
And the centrage Y engaging pin 237a with 237b is parallel with axis X.Engaging pin 237a is the first engagement member, engages pin 237b
It it is the second engagement member.Carrier 233 is used for locking release component, and it is for discharging the lock-out state of locking mechanism, and its
It is organized into two component 233a and 233b being divided on the circumferencial direction centered by axis X.Two component 233a and
233b is of similar shape, and more specifically, its linear symmetric each other.Hammer 222 is raw by the integral forming process of metal
Produce to have predetermined quality, and it is coupled to main shaft 228 by cam mechanism.In the front side of hammer 222, in a circumferential direction
Two parts on define hammer pawl 223 (the first protuberance).Hammer pawl 223 is to form for striking impact arm 221
The protuberance of one shock surface, it is prominent to output shaft 218 side, and each of which is rotating forward tool on direction
There is shock surface 223a and there is on counter-rotating direction shock surface 223b, shock surface 223a and shock surface 223b
On two sides being respectively formed on circumferencial direction.In this manual, rotating forward direction and spiral shell will such as be tightened
Nail or the direction of bolt corresponding and reversely rotate direction with unclamp screw or the direction of bolt corresponding on the premise of be given
Describe.Each hammer pawl 223 of this 3rd embodiment is further provided with shock surface 223c, and it is at shock surface 223a
The second shock surface that inner circumferential side is formed, and in an identical manner at the inner circumferential side formation collimeter of shock surface 223b
Face 223d.This second shock surface 223c has the spill for peripheral impact direction relative to the first shock surface.This
In the case of, each hammer pawl 223 is possible not only to have the shape highlighted in the axial direction relative to hammer 222, and can have in footpath
The shape projected upwards, or shape the most prominent.
Anvil 220 is intended to by the component of hammer 222 impact, and it has a shape, and in this shape, output shaft 218 is connected to anvil
The top side of 220, and they produce in integral forming process.Anvil 220 is formed at radially from having cylinder
Two striking arms 221 (the second protuberance) of stretching out of main component.In the position of 180 degree of anglecs of rotation relative to each other, with
The mode stretching out diametrically and also engaging with the first protuberance of hammer pawl 223 is made to form striking arm 221.Based on it
Being intended to the essence of the component impacted, each striking arm 221 forms rectangular cylindrical at it from the shape that anvil 220 stretches out, but
Being to be not limited to this shape, above-mentioned shape can be the basic configuration of cylindricality, or another simple shape, as long as ensure that foot
Enough intensity and ruggedness.For each striking arm 221, it is important that there are two impacts and stand surface, this impact warp
By surface, be there is flat shape or the shape being associated with the shock surface being formed on, and in a circumferential direction, impact
One side of arm 221 forms impact in the forward direction and stands surface 221a, and in a circumferential direction, another side is instead
It is upwardly formed impact to side and stands surface 221b.Being separated from each other in two parts of 180 degree of main part of anvil 220, formed
Each there is relief surface 220a of a part of cut one-tenth plane.
In anvil 220 and the periphery of output shaft 218, it is provided with locking ring 238.The major function of locking ring 238 is rotatable
Ground support carrying frame 233.Output shaft 218 is supported by the bearing 229a being arranged near locking ring 238.Footpath at locking ring 238
Upwards it is separated from each other in two parts of 180 degree, forms the protuberance 238b each with cubic shaped substantially, protuberance
238b is fixed on the inwall of main outer housing 202 on the groove of formation.Protuberance 238b is on the circumferencial direction of locking ring 238
The protuberance formed in two parts of 180 degree that are separated from each other, and by these protuberances being installed to the inner circle at main outer housing 202
In the recess formed in perimeter surface, locking ring 238 can be fixed on main outer housing 202.In this case, at circumferencial direction
On be formed at the protuberance on locking ring 238 and do not limited by this structure, and it can have recess and be formed at locking ring 238
Side, protuberance are formed at the structure of the inwall side of main outer housing 202, or optionally use the knot with concave-convex portion of recess and protuberance
Structure, or its can be formed as supporting structure known to another or rotate stop structure.
Carrier 233 serves as locking release component, and it has formation after being combined by two component 233a and 233b
The structure of cylinder form substantially, but, in this 3rd embodiment, a carrier 233 is organized into two structures
Part 233a and 233b, two of which component 233a and 233b are by along including that cylindrical member is divided into two portions by axial plane
Divide and formed.Carrier 233 is coaxially disposed relative to anvil 220, and it is arranged on the outside of anvil 220 diametrically.Carrying
Frame 233 is not attached to anvil 220, and is attached to anvil 220, thin coaxially, relatively may move (rotatable) relative to anvil 220
Low-angle.Carrier 233 has cylindrical portion, and this cylindrical portion has the internal diameter of the external diameter of the cylindrical portion being substantially equal to anvil 220.At this
In the case of Zhong, gap is maintained at permission carrier 233 and anvil 220 rotates against in required degree.Rear portion in cylindrical portion
On two positions, define recess (the second cut portion), and also form protuberance 234a and 234b, protuberance 234a
Highlight diametrically with the 234b two edges (two ends) from the circumferencial direction of each recess.At relative protuberance 234a and
The width diametrically that gap between protuberance 234b is designed to Charpy arm 221 is somewhat broader.In present embodiment
In, owing to two striking arms 221 are outwardly formed from the position in 180 degree of cylindricality post portion of deviation anvil 220, therefore protuberance 234a with
234b is formed at four positions altogether, i.e. stand the relative position of surface 221a and 221b with impact respectively.
Protuberance 234a and 234b contacted with newly-increased shock surface 223c and 223d being added to hammer into shape 222 is by being impacted
Surface 223c and 223d impacts, and is allowed to rotate relative to the anvil 220 of carrier 233.Centered by axis X radially,
The placement position of shock surface 223c and 223d overlaps each other with the placement position of protuberance 234a and 234b.But, carrier
233 and the angle that rotates against of anvil 220 be about 10 or+10 degree.The position relative with relief surface 220a at carrier 233
Put, form cut portion 235b and the 235d serving as the first cut portion.Cut portion 235b and 235d define receiving first and the
The space of two engagement members, i.e. engage pin 237a and 237b.In cut portion 235b and 235d, the inner circumferential side of each covers
There is relief surface 220a of anvil 220, and in cut portion 235b and 235d, the outer circumferential sides of each is covered with locking ring 238
Cylindrical portion 238d.Additionally, in cut portion 235b and 235d the bearing 229a of each be partially covered with locking ring 238
Circular ring portion 238a.In this way, engage pin 237a and 237b and be arranged on the sky using cut portion 235b and 235d to define
In between, and engage in the way of pin 237a and 237b is allowed to the rotation to follow anvil 220 and rotate.After motor 204 stops,
When relative position between anvil 220 with carrier 233 is deviateed diametrically, engage pin 237a and 237b and serve as limiting anvil
The locking mechanism rotated against between 220 and locking ring 238, will be described in this lock function after a while.
Figure 14 is the partial sectional view representing the amplification near the locking ring 238 of Figure 12.Form two structures of carrier 233
Part 233a and 233b is arranged on the front side of hammer 222, so that their rear end is arranged on the basic phase with the rear end of striking arm 221
Same position.The top of carrier 233 has the front limited by circular ring portion 238a of locking ring 238, and outside it
Circumference is supported by cylindrical portion 238d, and its inner circumferential side is supported by the external peripheral surface of anvil 220.In the rear end side of anvil 220
Immediate vicinity, forms the installing hole 220b with cylindricality, and in the 220b of this hole, contains on the top of main shaft 228
The installation axle 228a formed.By this way, it is pivotally supported with relative with the front end of main shaft 228 due to the rear end of anvil 220
Rotatable, therefore, it is possible to realize the beater mechanism 219 with higher stiffness.Locking ring 238 has circular ring portion 238a and is formed at
Structure on the inside of the front side of cylindrical portion 238d.At the rear side of cylindrical portion 238d, circular ring portion 238e be formed on outside with
Form flange shape.Although locking ring 238 is held to not rotate relative to main outer housing 202, but allow engage pin 237a and
237b rotates together with anvil 220 centered by axis X, goes out as shown in Figure 13.Fine contact region (protuberance etc.) is preferred
Ground is formed at each top engaging pin 237a and 237b in the axial direction, to avoid rubbing relative to two component 233a and 233b
Wipe resistance and become the highest.It should be noted that near circular ring portion 238a of locking ring 238, the o-ring having been not shown can be by
It is attached to avoid lubricating oil to leak from beater mechanism portion.
In the inner side on the top of output shaft 218, being perpendicular to be axially formed the installing hole 218a inserting tip end tool, it is cuing open
Having hexagonal shape on face, wherein the installation portion 240 for tip end tool is formed at the outer circumferential sides on top.At output shaft
On the side of 218, defining through hole 218b, it accommodates the ball 243 being moved in, and through hole 218b is formed as avoiding
Ball 243 departs from from through hole 218b and falls the shape of inner circumferential side.The outside radially of ball 243 is supported by sleeve 241,
Groove 241 is exerted a force by spring 244.The front side of spring 244 is fixed by packing ring 242, and packing ring 242 is supported by C-shaped ring 245 with not
Move in the axial direction.When tip end tool being attached to output shaft 218 or dismantling from output shaft 218, spring resisted by sleeve 241
244 move forward from the normal position shown in Figure 14 in the axial direction by pressure, in order to perform attachment or disassembling section.When
When sleeve 241 is moved forward, the outer circumference portion of each in ball 243 is discharged from the adjacency state of convex surface, should
Concave surface is formed at the inner circumferential side of sleeve 241 and continues in a circumferential direction, and its result is that ball 243 becomes can be diametrically
It is displaced outwardly.Therefore, it can not perform with there is no any resistance attachment and the unloading process of tip end tool.
Figure 15 is the enlarged partial sectional view of the shape representing hammer 222 and carrier 233, and it is corresponding to the edge of Figure 14
The sectional view of B-B portion intercepts.Two the hammer pawls 223 being arranged on diagonal angle in a circumferential direction are designed to except at circumferencial direction
On be positioned at outside two shock surface 223a and 223b of outer circumferential sides, two shock surface 223c and 223d are increased and are formed
In inner circumferential side.Here, shock surface 223a and 223b is formed striking impact stands surface 221a and 221b, and they
Have and use hammers the function that pawl is identical into shape in existing percussion tool, and also there is roughly the same basic configuration.Impact
Surface 223c is for the protuberance 234a of pressing member 233a.Here, such as the position relationship from Figure 15 it is understood that work as
When trip bolt when of rotary hammer 222 counterclockwise, first make the shock surface 223c of hammer pawl 223 and rushing of protuberance 234a
Hit and stand surface 234c contact.As described earlier, it is allowed to component 233a and striking arm 221 relatively move predetermined little angle
Degree, such as, mobile about 20 degree centered by axis X.For this reason, although shock surface 223c pressing impact stands table
Face 234c, but do not produce impulsive force.After this state, when component 233a is rotated counterclockwise by the rotation of hammer 222
Time, component 233a rotates tiny angle relative to striking arm 221, and hammer into shape the shock surface 223a of 222 subsequently with striking arm 221
Impact stand surface 221a collision.In this collides, owing to the repulsive force from component to be tightened is from tip end tool
Being passed to output shaft 218 integral part of with anvil 220, therefore this collision gives thump.Figure 15 shows and works as collimeter
Face 223a and impact stand state when surface 221a is engaged with each other, and have now prepared at protuberance 234a and striking arm
The structure of predetermined gap is produced between 221.In other words, relative to protuberance 234a thickness " b " in a rotational direction, punching
Hit the distance that the impact of arm 221 stands between the shock surface 223c of surface 221a and hammer pawl 223 and regard " a " as, relation is set
It is set to a ＜ b.By using this structure, owing to rotating hour hammer pawl to it when impacting or before the installation procedure of bolt etc.
The power of 223 is applied directly on striking arm 221, and therefore moment of torsion transmission is not contributed by component 233a, and its result is not have
Cause the negative consequence produced due to the insertion of component 233a.Additionally, due to do not transmit strong impact force to component 233a, because of
This can alleviate to the impact engaging pin 237a and 237b transmission supported by component 233a, and thus provides latch-up structure
Relatively long service life.It should be noted that, although eliminate its explanation in fig .15, but also create identical in component 233b side
Contact and impact conditions.
It follows that with reference to Figure 16 A to 16D, will carry out about the state by driving percussion tool 201 to perform to fasten work
Describe.Figure 16 A to 16D represents section and the section of B-B part of the A-A part being arranged side by side in the horizontal in Figure 14 respectively,
And in this case, hammer 222 is driven by motor 204.Hammer 222, anvil 220, component 233a and 233b and along with them
The component of difference centered by axis X, the most symmetrically (disymmetry) arrange, for convenience of description, only to some
Part provides reference.
Component 233a and 233b clamps the striking arm 221 of anvil 220, and it is additionally provided with protuberance 234a and 234b, with
Surface 221a and 221b is stood for the impact of striking arm 221 there is predetermined gap, in order to make the pivot of component 233a and 233b
Gyration be limited in predetermined within the scope of.Figure 16 A represents hammer pawl 223 and striking arm 221 state separated from one another, i.e. such as,
State when rotating is started at hammer 222.From this state, the rotary driving force produced that rotates of motor 204 pass through to slow down
Mechanism 214 is passed to main shaft 228, in order to the hammer 222 supported by cam mechanism is allowed to rotate up in the side of arrow 261.
Now, the position of striking arm 221 shown in the drawings, i.e. the anglec of rotation of anvil 220, with component 233a and
Position relationship between protuberance 234a and 234b of 233b.Additionally, diametrically from component 233a and 233b stretch out prominent
Portion 234a and 234b and striking arm 221 keep on the position in predetermined gap 262 and 263 in a stable manner between which
Supported.As from Figure 16 A it is understood that the axle portion of anvil 220, i.e. output shaft 218, be accommodated in component 233a and 233b
Cylindrical portion inside, wherein engage pin 237a and 237b and lay respectively at the interior volume of cut portion 235b and 235d.In this feelings
Under condition, only component 233a and 233b is installed to the outer circumference portion of anvil 220, and they are designed to by arranging them
Shape relatively rotate tiny angle.
Figure 16 B represents and starts state when rotating at component 233a and 233b, and in this condition, hammer 222 is at arrow 264
Further rotate on direction, in order to the impact of the shock surface 223c and protuberance 234a and 234b of hammer pawl 223 stands surface
234c and 234d adjoins.When making hammer 222 rotate by the moment of torsion of motor 204, rotating before impact anvil 220, making hammer 222
Contact with component 233a and 233b, so that component 233a and 233b rotates.Due to this reason, by hammer pawl 223 each
Shape is designed as when each in shock surface 223c and protuberance 234c and 234d is adjacent so that shock surface 223a
Do not contact with striking arm 221.When making hammer 222 further rotate from this state, as shown by the right side view at Figure 16 C
, hammer pawl 223 is while making component 233a and the 233b side at arrow 265 rotate up, it is allowed to shock surface 223a and punching
The impact hitting arm 221 stands surface 221a collision, thus is applied with impulsive force to anvil 220.In this case, as at Figure 16 C
Shown in, owing to existing by the gap 267 indicated by thick line, therefore avoid component 233a striking impact arm 221.Above
The function mentioned is used in component 233b side the most in the same way.Additionally, now, ratio is become in the gap of arrow 266
Gap 262 in Figure 16 A is bigger.
In this way, each in making component 233a and 233b rotates predetermined angle relative to striking arm 211
In the case of, as gone out shown on the left side view of Figure 16 C, so that on the circumferencial direction of component 233a and 233b
Cut portion 235b contacts with engaging the outer circumference of each in pin 237a and 237b with the marginal portion of each in 235d,
To promote each engaged in pin 237a and 237b to back to the relief surface formed on the circumferential surface of anvil 220
The core of 220a.Hammer 222 impacts anvil 220 while making component 233a and 233b rotate, and transmits to top end shaft side
This rotation.Anvil 220 rotates, and makes the inner circumferential side of each engaged in pin 237a and 237b connect with relief surface 220a simultaneously
Touch, but, contact site (the line portion parallel with axis X) is the most substantially maintained at the center of relief surface 220a.
Figure 16 D is to represent to make hammer 222 further rotation of on the direction of arrow 280 from the state shown in Figure 16
The view of state.In this case, the shock surface 223a of hammer pawl 223 promotes or the rushing of striking impact arm 221 forcefully
Hit and stand surface 221a so that anvil 220 rotates.Now, each engaged in pin 237a and 237b is retained as and component
The marginal portion of each in cut portion 235b of 233a and 233b and 235d contacts.For this reason, as revolving
Anvil 220, component 233a and 233b, joint pin 237a and 237b that transfer part is divided can be rotated continuously by hammer 222, and the most consumingly
Disturb the inwall of the locking ring 38 as non-rotatable part, and maintain the relative position relation in Figure 16 D.I.e., it is possible to keep away
Exempt from component 233a and 233b to rotate energetically and cause being engaged in pin 237a and 237b by what component 233a and 233b rolled
Each is with locking ring 238 with the end collision of relief surface 220a of anvil 220.
Figure 17 A is the axonometric chart of the shape of the carrier 233 representing Figure 13, and Figure 17 B is the A-A section position at Figure 14
Put the sectional view at place.Carrier 233 has the shape of cylinder, and in the present embodiment, it is designed to have and passes through
By cylindrical member along the shape including axial plane to divide and to be formed.At the starting stage of exploitation, inventor's designed component
233a and 233b is so that component 233a and the 233b cylindrical shape that is integrally formed to substantially.But, in this case,
Find to may result in problem during operation.In order to be more fully understood that this 3rd embodiment, with reference to Figure 20 and 21, hereafter
Situation when problem explanation caused by integrated carrier in the starting stage of exploitation occurs is described.
Figure 20 A and 20B represents the carrier produced by integral forming process, and Figure 20 A is the shape representing carrier 333
The axonometric chart of shape, and Figure 20 B be represent carrier 333, engage pin 237a and 237b and locking ring 238 between position
The sectional view of relation.Integrated carrier 333 is to be produced by the moulding process of metal alloy, and it has a knot
Structure, in the structure shown here, defines cut portion 335a and cut portion 335b, and cut portion 335a is for having cylindrical shape
On basic component, definition is for supporting the space engaging pin 237a and 237b, and cut portion 335b is for accommodating the striking arm of anvil 220
221, wherein, so that protuberance 334 is in a circumferential direction from the edge of cut portion 335b, mode outwardly is formed prominent
Portion 334.In Figure 20 A, carrier 333 is designed to about including the axial of direction that striking arm 221 extends and output shaft 218
Virtual plane 340 plane symmetry.When carrier 333 be attached to anvil 220 and subsequently locking ring 238 be attached on it
Time, define such as the position relationship shown in Figure 20 B, wherein engage pin 237a and 237b and be located substantially at carrier 333
The center of two cut portions 335a.Now, engage pin 237a and 237b and be located substantially at the center of relief surface 220a.
Figure 21 A and 21B is for explanation when using the carrier 333 of Figure 20 A to 20B, between hammer 222 and anvil 220
The view of position relationship, and Figure 21 A is the sectional view corresponding with the B-B profile position of Figure 14, and Figure 21 B with Figure 14
The sectional view that A-A profile position is corresponding.As shown in Figure 21 A, when hammering 222 rotation into shape, hammer pawl 223 with striking arm
Adjacent protuberance 334 before 221 collisions.When the hammer 222 such as rotation shown in Figure 21 A, at hammer pawl 223 and striking arm
Before 221 collisions, adjacent protuberance 334 near the hammer pawl 223 arrow E in Figure 21 A.By this contact, carrier 333 is big
Cause and anvil 220 synchronous rotary.But, in the case of being caused slight deformation etc. by deviation when producing carrier 333, carrier
333 trend towards the rotation axis slight bias relative to carrier 333, and as by indicated by arrow F, trended towards occurring
The state being not in contact with between protuberance 334 and shock surface 223c of the side of hammer pawl 223.In this case, although
One in engagement member (engaging pin) discharges from lock-out state, but sometimes other engagement member (engaging pin) is maintained at
Lock-out state, its result is that the impact load applied at the lateral carrier of arrow E 333 by hammer 222 trends towards becoming normal load
Twice.For this reason, in order to avoid to the damage of carrier 333 and also ensure that its ruggedness, producing and have enough
The carrier 333 of intensity is necessary.In order to ensure the sufficient intensity in carrier 333, need to make the thickness of carrier 333 more
Thickness, this causes weight increase and make outer housing thick and heavy on the contrary.
Figure 12 B is the view representing the position relationship between carrier 333 and locking ring 238.Due in arrow E side
The state of the side contacts that part contact and part in arrow F side are not in contact with, creates near the arrow G of Figure 12 B
Unwanted gap, which results in the state not allowing carrier 333 relative to locking ring 238 Smooth Rotation.In order to avoid this
Individual problem, requires further improvement carrier 333, anvil 220 and the machining accuracy of locking ring 238 and strengthens assembly precision, but
It is that they result in the increase of production cost.
Figure 17 A to 17B is to represent for solving such as the side by the problem indicated by Figure 20 A to 20D and Figure 21 A to 21D
The view of method, wherein carrier 233 is divided into two component 233a and 233b along the virtual plane 340 shown in Figure 20 A.Empty
The direction that quasi-plane 340 extends with striking arm 221 is parallel, and it is corresponding to including the plane of the axis X of output shaft 218.Logical
Cross and use two separate component 233a and 233b as a unit, define single carrier 233.At two component 233a
In the case of being designed to plane symmetry or rotational symmetric shape with 233b, owing to they are for right or left side, so this
Two identical parts can serve as a pair, so that provide advantageous approach from the viewpoint of production cost.In this reality
Execute in mode, in order to accommodate striking arm 221, as cut portion 235a shown in Figure 18 A and 18B and 235c are respectively formed at two
On individual component 233a and 233b.It addition, for the position of the virtual plane for dividing, even if when by the most slightly
Micro-mobile virtual plane 340 and when making divisional plane move, as long as this moves is the model of protuberance 334 in not touching Figure 20 A
Carry out in enclosing would not come into question.
Figure 17 B is to represent in component 233a and 233b, position between joint pin 237a and 237b and locking ring 238
The view of relation.Although this shape is substantially identical with shown in Figure 20 B, but between right and left component 233a and 233b
Divisional plane be arranged close to arrow C and D.This structure is preferably designed to be component 233a and 233b on these divisional planes
It is slightly separated, however, it is possible to make them contact lightly at arrow C with D, if component 233a respectively and 233b quilt
Allow to be independently moved into optimum position.
Figure 18 A and 18B is the view of the shape of the component 233a being denoted as single component, and wherein Figure 18 A is radially
On from the axonometric chart of external observation component 233a, Figure 18 B be diametrically from inside observe component 233a axonometric chart.By metal
The component 233a made is integrally molded so as semi-cylindrical shape.Cut portion 235d is formed approximately at component in a circumferential direction
The center of 233a.Cut portion 235b is formed to accommodate to engage sells 237b.In this case, semi-cylindrical shape refer to by
Cylindrical member (having been not shown) is along the plane through axis X, i.e. the virtual plane 340 of Figure 20 A, is divided into two.
On two edges that protuberance 234b is respectively formed on the circumferencial direction of component 233b.Cut portion 235a is formed at
On component 233a, and cut portion 235c is formed on component 233b.Cut portion 235a and cut portion 235c and the second cut portion
Corresponding, and the second cut portion formed above component 233a and 233b.Each in protuberance 234b has by shape
Become the shape of each that the part of cut portion 235a and 235c is cut and is bent outwardly diametrically in cut away part
Shape, its result is cut portion 235a and 235c is formed in the way of adjacent with protuberance 234b.Cut portion 235a and 235c are formed
One space, wherein striking arm 221 penetrates this space.In cut portion 235a and 235c, formed hole 235e and 235f, hole 235e and
235f each has circle substantially.This some holes 235e and 235f are formed to avoid the pressure being applied to protuberance 234a to concentrate
The damage caused on component 233a, pressure concentrates on the specific part of protuberance 234a, i.e. cut portion 235a with
Near coupling part between 235c, and had by each allowing in 235e and 235f of hole there is suitable radius of curvature R
R type shape, can suitably dispersive pressure.
Figure 19 A and 19B is for explanation anvil 220 at the A-A profile position of Figure 14 and to engage the position sold between 237a
Put the view of relation.As shown in Figure 16 D, when hammer 222 when rotated, anvil 220 is at the shock surface 223a of hammer pawl 223
Rotate under the state that the impact of promotion striking arm 221 stands surface 221a, thus indicated anvil 220 by Figure 19 A and engage pin 237a
Between position relationship, and this position by engage pin 237a define locking off-position.In this condition, each joint
Sell in the minds of during 237a is located substantially in the vertical direction (circumferencial direction) of relief surface 220a, i.e. assuming that relief surface 220a
Vertical direction (circumferencial direction) on width be 2c, then anvil 220 with engage pin 237a between contact point 272 be positioned at distance top
On the position in portion " c " and the position of distance bottom " c ".In this case, from center of rotation 271 to engaging pin 237a
The ultimate range of circumferential surface is represented by R1.R1 is expressed as described below:
R1=(radius of anvil 220)-(resection of relief surface 220a)+(engaging the diameter of pin 237a) is in this enforcement
In mode, by R1 being set smaller than the internal diameter of cylindrical portion 238d of locking ring 238 so that engage pin 237a and be not intended to anvil
220 and the rotation of carrier 233.It should be noted that tighten screw etc. not only by making percussion tool 201 self rotate, and
Even and if by unclamping the rotation that can also lock anvil 220 in an identical manner.
In fig. 19b, when the anvil 220 rotation as indicated by arrow 273, define and engage pin 237a by arrow
The position relationship that on the directions of 274 instructions, position relationship in the case of relative movement is identical, and this position is by engaging
Pin 237a defines latched position.Therefore, position the connecing from Figure 19 A that joint pin 237a and relief surface 220a contact with each other is made
Contact 272 moves to the contact point 275 of Figure 19 B.Therefore, Figure 19 A from the center of rotation 271 of anvil 220 to engaging pin 237a
The maximum distance of external peripheral surface is changed to R2 from R1.As from accompanying drawing it should be understood that for R2, meet the position of R1 ＜ R2
Relation so that by arranging the size of the internal diameter Rc of locking ring 238 to meet the relation of R1 ＜ Rc ＜ R2, by as in Figure 19 B
The shown change in the relative position relation engaging pin 237a, engage pin 237a be allowed to clamp-on locking ring 238 and from
Between the end of gap surface 220a, and locking ring 238 and anvil 220 are formed integrated unit and serve as the lock of output shaft 218
Determine mechanism.That is, when workman is in nothing operation in the case of rotary impact tool 201, owing to the rotation of anvil 220 is maintained at locking
State, therefore can efficiently perform and manually fasten work.
It addition, in addition to carried out trip bolt etc. by rotary impact tool 201, when performing release process (in impact
The direction of rotation of instrument 201 be reversely in the case of), the rotation of anvil 220 is also locked out.As described above, in this reality
Execute in mode, when stopping motor 204 and the anvil then rotated relative to main outer housing 202 at the rotation withholding period chien shih of hammer 222
During 220 rotation, when the center of relief surface 220a separates with the joint pin 237a serving as engagement member, engage pin 237a
Clamped by the external peripheral surface of anvil 220 and the inner circumferential surface of locking ring 238.As a result of which it is, limit anvil 220 relative to lock
Determine the rotation of ring 238.It should be noted that, although Figure 19 A and 19B illustrate only the joint pin 237a of side, but, identical shape
State occurs in the joint pin 237b of opposite side.By this way, when performing manually to fasten by rotary impact tool 201
During work, by the function locking anvil 220 of locking ring 238 with non-rotatable relative to locking ring 238, in order to realize output shaft lock
Determine function, and can perform manually to fasten work easily.Even if additionally, will work from the fastening by using driving source
In the case of work is transferred to manually fasten work, workman is not needed to carry out the spy of such as pull operation to bar or the like
Different operation, it is only necessary to rotary impact tool 201 self simply so that the most convenient power tool used can be realized.
After completing this and manually fastening work, in the case of the execution fastener cycle for next screw, pass through
Trigger 206 is pulled to carry out rotation motor 204, and in this case, as shown by Figure 16 A to 16C, due to hammer pawl
Each in protuberance 234a and 234b of 223 pushing members 233a, hence in so that engage the pin 237a position relative to anvil 220
Put and be returned to the position of Figure 16 A and be brought into free state, i.e. locking release conditions.For this reason, can perform
Identical existing tightening operation and do not bring the normal fastening any adverse effect of work by using motor 204.
As described above, according to the percussion tool 201 of this 3rd embodiment, anvil 220 and output shaft 218 are produced
It is an integrative-structure, and only by the carrier 233 and joint pin 237a and 237b with separable structure are increased to
The locking mechanism of output shaft 218 is achieved on it.Therefore, it can simplify the shape of anvil 220 and also effectively to top work
The impact energy of tool transmission hammer 222.Additionally, due to anvil 220 and output shaft 218 are formed integrative-structure, therefore can be notable
Ground reduces and is standing impact based on hammer 222 when surface 221a and 221b is transferred to output shaft 218 by rotating from the impact of anvil 220
Produced impact sound and vibration.Additionally, due to carrier is by separately to be organized into the first carrier component and the second carrying
Frame member, therefore can eliminate moment of torsion is the probability that the twice of normal moment of torsion that possible only apply to side is high, and with one
Build carrier component is compared and thickness can be made thinner, in order to realize locking mechanism that is lightweight and that can save installing space.
Additionally, due to can centered by pivot axis 209 bend crash instrument 201, therefore by rotate main body perform fastening
Apply higher moment of torsion during journey and become possibility.
In this 3rd embodiment, in the case of attempting by using motor 204 to perform fastener cycle, locking ring
238 and output shaft 218 from fixing state start on tightening direction (direction contrary with manual tightening direction) rotate, pass through
Simple rotation first has to the hammer 222 contacted with carrier 233, brings outer housing 202b and output shaft 218 into free idling conditions, nothing
Need to attempt utilizing manually fastening work that output shaft locks and by using switch operating between the fastening work of motor 204.
In this way, in the present embodiment, it is not necessary to operation output shaft locking switch etc., only by the tightening direction of fastening member
The main body of simple rotation percussion tool 201, after completing to fasten work and motor 204 stopping, can performing fastening member
Extra rundown process and the confirmation to tight condition.
According to the present invention, owing to separate carrier component is of similar shape, therefore leading to undergone mass production can be pre-
The reduction of current cost, and realize ease of Use in an assembling process.
According to the present invention, in the case of during the rotation of hammer stops, anvil rotates relative to outer housing, due to anvil and locking ring
Between rotate against and limited so that for locking output shaft without special operational, it is thereby achieved that have relatively Gao Kecao
The property made and the power tool of higher reliability, it does not has faulty operation.Specifically, the relative rotation between carrier component and anvil
Gyration goes above predetermined angle time the center of relief surface is separated with engagement member, produces lock-out state,
Therefore, it is allowed to workman locks output shaft easily simply by Rotating outer main body slightly, and wherein tip end tool is pressed
On component to be tightened.
Another preferred purpose of the present invention is, has rotation for manual fastener cycle, for fixing anvil
Lock function power tool in, the shape of anvil and the periphery of anvil be simplified allow to reduce production cost.
A further object of the present invention is, at for manual fastener cycle, the lock function of rotation for fixing anvil
In, by avoiding the side contact condition making hammer pawl only contact with in carrier, can avoid in manual retention mechanism
Defective operation.
According to the present invention, stand the bearing of trend on surface highlight abreast owing to protuberance is shaped generally as the impact with anvil
Shape, the shock surface carrier component therefore hammered into shape by utilization can be rotated relative to anvil easily.Rotation at driver element
Period, engagement member is kept to be arranged on the center of relief surface, and wherein engagement member connects with the carrier component of movement
Touch so that outer housing and output shaft are maintained at free state to rotate idly, so that by driving source just performing
Normal fastening work and be not resulted in any problem.
According to the present invention, owing to providing, when hammer rotate time, hammer before engaging with anvil with lock release component engage with
The structure of locking that release locking component is carried out, hence in so that anvil is rotatable and be performed without any special operation.
According to the present invention, owing to hammer is provided with the first shock surface for impacting anvil and contact the with carrier component
Two shock surfaces, therefore the shape by simply changing hammer pawl just can impact two components (anvil, carrier component).
According to the present invention, when hammer rotates, first make the second shock surface contact with carrier component, next make first
Shock surface contacts with anvil.Therefore, at the eve that anvil is beaten by hammering, can be with moving bearing bracket component so that can be positively
The lock-out state of release output shaft.Additionally, due to the impulsive force of hammer is directly transferred to anvil, and it is not passed through locking release component,
Therefore, even if when the rigidity locking release component is relatively low, the impulsive force of hammer is passed the most effectively.
In description above, have been based on embodiment and describe the present invention, but, the invention is not restricted to the 3rd enforcement
Mode, and can various modification can be adapted without departing from the purport of the present invention to it.Such as, the 3rd enforcement having been described above
Mode is exemplified with the power tool with warp architecture.However, it is possible to apply the present invention in an identical manner not bend
The power tool of structure.Additionally, the 3rd embodiment having been described above has illustrated the percussion tool of mechanical system as dynamic
Power instrument.However, it is possible to apply the present invention to the oil percussion tool of pulse system, electronic impulse system in an identical manner
Percussion tool and driver are bored.Additionally, for the power tool of such as grinder and annular saw etc, the application of the invention
Structure as avoiding the locking mechanism that output shaft rotates in the case of unclamping the nut for fixing tip end tool, make
Possibility must be become simply by locking output shaft with hands supporting outer housing.
Embodiment 4
With reference to accompanying drawing, the 4th embodiment of the present invention will be described.It should be noted that in accompanying drawing subsequently, utilize phase
With reference represent identical part, and will the repetitive description thereof will be omitted.In this manual, will be at vertical and horizontal
Explanation is given on the premise of corresponding with indicated in the accompanying drawings direction.Figure 22 is the integral part representing percussion tool 401
Sectional view, percussion tool 401 is an example of the tightening tool (power tool) according to four embodiment of the invention.
Percussion tool 401 utilizes chargeable and that be removably attached set of cells 450 as power supply, and uses and is not shown
The motor gone out applies revolving force and impulsive force by Poewr transmission mechanism to output shaft as driving source so that revolving force and impact
Power is passed to the tip end tool of the such as driver bit etc being supported by the installing hole being coated with installation portion 440, and
And perform the work of such as screw fastening or tightening process for a bolt etc.It is (front that the outer housing of percussion tool 401 is organized into main outer housing
Outer housing) 402 and handle outer housing (rear outer housing) 403.Going out as shown in Figure 27, main outer housing 402 is by the multiple knot of combination with one another
Structure component, more specifically, consist of two structural elements 402-1 and 402-2 of combination with one another.Two structural elements 402-1
It is separated from each other along divisional plane W along the axis X serving as border with 402-2.Go out as shown in Figure 26, on main outer housing 402
Form axis hole 801.Axis hole 801 is formed at the opposite side of handle outer housing 403.
Main outer housing 402 is formed and by laterally by the integral forming process of the polymer resin of such as plastic material etc
Upper separable two unit form, and the screw being had been not shown by use fixes right and left unit.Handle outer housing 403 quilt
Be formed as cylindrical shape substantially or the cylinder in its back-end with opening 403a, and it is by such as plastics material
The integral forming process of the polymer resin of material etc produces and is formed the most separable unit.Main outer housing 402
The privot mechanism with the pivotal axis having been not shown is passed through on the direction of front to back at adjacent central portion with handle outer housing 403
Coupled to each other, and it is allowed to centered by pivotal axis pivot about 70 degree.When observing in fig. 22, perform pivot thereon
This plane that transhipment is moved is (identical with paper with the plane in the direction included forwardly and rearwardly and direction up and down
Plane) corresponding.Additionally, go out as shown in Figure 22, by main outer housing 402 and handle outer housing 403 from them at identical axle
Rectilinear shape that be arranged side by side on line, so-called change over as after a while will described in Figure 23 shown in, they are by pivot
Turn, so-called gun shaped shape.Workman can according to working space and target they are arranged to linear type or gun shaped with
Perform work.
The percussion tool 401 of present embodiment is to use known beater mechanism as the power work of Poewr transmission mechanism
Tool, can be implemented as so-called driver and be bored and other power tools of cordless system.The motor quilt that will describe after a while
It is contained in the inside of main outer housing 202, and its rotary shaft is connected to Poewr transmission mechanism (drive member) for rotating tip
Instrument.Be provided with have that the set of cells 450 of cylinder form substantially is formed to serve as can be by light easily changeable power supply
So-called cassette system, the opening 403a of its end being passed through handle outer housing 403 is attached to inner space and from inside
Space is dismantled.Two plug pin portion having been not shown are formed on the housing of set of cells 450, and its with at handle outer housing 403
The recess (having been not shown) formed on inwall engages so that set of cells 450 is kept.In order to dismantle set of cells 450, it is being formed at
While plug pin portion 451 in two parts of right and left is depressed, set of cells 450 is pulled back through opening 403a.Battery
The shape of the rear end of group 450 is formed to cover the opening 403a of handle outer housing 403, wherein formed behind of set of cells 450
One part of the external margin of hands outer housing 403.Inside set of cells 450, contain multiple lithium ionic cell unit, and can
To arrange the size of battery, quantity etc. alternatively.
The inner containment of the handle outer housing 403 corresponding with the space of the part of neighbouring privot mechanism trigger 406 and
Forwards/reverse selector bar 408, trigger 406 supplies electric energy/stopping electric energy to motor for control to motor for operation
Switch (master switch), forwards/reverse selector bar 408 is for the direction of rotation of switching motor.In the present embodiment, response is used
The amount of pulling in trigger 406 changes the so-called variable resistance switch of its resistance value as master switch so that according to trigger
The operational ton of 406 changes the revolution of motor.Trigger 406 has finger pad portion 406a, and this finger pad portion 406a has wide enough
Enough a finger is placed on width thereon, and its be designed to by front side of allowing with the axle point (swinging axle being described later on
Line) centered by swing (pivot/rotate) predetermined angular, it is allowed to the rear end of trigger 406 is swung up substantially vertical.Forward/
Reverse conversion bar 408 is approximately positioned at the top of the pivot axis of trigger 406.Forwards/reverse selector bar 408 be for
" rotate forward direction (tightening direction) " and the turning of the direction of rotation of switching motor between " reversely rotate direction (unclamping direction) "
Change switch, and operate switch by sliding laterally this bar.
Handle outer housing 403 is used as the grip part mainly grasped by workman, and it is designed such that when being grabbed by workman
It is suitable for the shape of the hands of workman when holding, and forms elastic component 413a and 413b in the upper side and lower side of handle outer housing 203.Separately
Outward, in this manual, in the case of the direction mentioning handle outer housing 403, unless otherwise specified, otherwise, such as institute in Figure 22
Illustrate, get off direction indication (the most same) based on the state that percussion tool 401 is placed in linear state.Elastic
Component 413a and 413b is by using the elastic elasticity higher composition material than the composition material of handle outer housing 403 (plastic material)
Material is formed, and its resin having higher elasticity by using the most two-layered, formed technology to utilize is prepared to forming handle
Thin skin layer in the lower floor of the composition component of hands outer housing 403.Opening 403a on the downside of handle outer housing 403 has been formed about dog hole
448, insert through this dog hole 448 for the rope etc. hung.
Sometimes, main outer housing 402 is grasped in the way of assistance by workman, and due to this reason, at the table of main outer housing 402 side
Elastic component 411 is also form on face.Elastic component 411 by using the composition material of main outer housing 402, such as, has and compares plastics
The composition material of the higher elasticity of elasticity of material is formed, and it has relatively by using the most two-layered, formed technology to utilize
Elastomeric resin is prepared to the thin skin layer being formed in the lower floor of the composition component of main outer housing 402.Additionally, at elastic component
Anti-slip part 411a and 411b is formed on the surface of 411.Such as, anti-slip part 411a and 411b are formed on elastic component 411
The multiple little recess formed.Owing to the purpose of these parts is to avoid skidding, therefore anti-slip part is possible not only to be formed as recess, and
And protuberance, groove, ladder etc. can also be formed as.Lid 446 is arranged on the downside of pivoting centre, main outer housing at this pivoting centre
402 and handle outer housing 403 bend each other.Downside refer between main outer housing 402 and handle outer housing 403 formed, have relatively
The space of narrow angle.Lid 446 is plate type member, and its at percussion tool 401 in pattern as shown in Figure 22, i.e.
Serving as outside framework component in the case of using under linear state, this outside framework component covers at main outer housing 402 and handle outer housing
Space near between 403, privot mechanism portion.
Figure 23 be represent when percussion tool 401 as shown in Figure 22 in the bent state time the side-looking of mode of operation
Figure.Based on this case of bending, main outer housing 402 and handle outer housing 403 are equipped with the intersecting angle of about 70 degree, to have what is called
Gun shaped form (handgun shape).From the surface of main outer housing 402, the protuberance 412 of prominent distance H is formed at main outer housing 402.
By this protuberance 412, the finger of workman is directed into the center of the finger pad portion 406a of trigger 406.Due to trigger 406
Operated by pulling of the forefinger of workman easily, therefore can perform the variable speed drive operation of motor 404 easily.
Figure 22 is the view of the internal structure representing percussion tool 401.Percussion tool 401 utilizes to be supplied from set of cells 450
Electric energy, and make the motor 404 serving as driving source rotate.Set of cells 450 has so-called box structure, and it can pass through
The opening 403a of the end of handle outer housing 403 is attached to inner space and dismantles from inner space.Two plug pin portion are (not
Be illustrated) be formed in set of cells 450, and they with on the inwall of handle outer housing 403 formed recess (having been not shown)
Engage.Three lithium ionic cell units (having been not shown) are accommodated in the inside of set of cells 450, and its rated voltage is set
Become the DC voltage of 10.8V.The other end at the installing space of the set of cells 450 being connected to opening 403a forms substrate 454, and
And multiple terminal 453 is to install in the way of opening 403a extension from substrate 454.Leading section (upper in figure in set of cells 450
Side), define multiple terminal 452, and by set of cells 450 being attached in handle outer housing 203, make terminal 452 and at base
The terminal 453 that plate 454 side is formed contacts.
The rotary speed (speed) of motor 404 is decelerated mechanism 414 and slows down, and it is passed to beater mechanism 419.?
In present embodiment, reducing gear 414 and beater mechanism 419 form Poewr transmission mechanism so that passed by the revolving force of motor 404
It is delivered to main shaft 428.Main outer housing 402 and handle outer housing 403 are allowed to centered by pivotal axis 409 pivot about 70 degree, and scheme
24 illustrate it becomes linear state.Main outer housing 402 is formed by the moulding process of the synthetic resin of such as plastics etc, with
Make it be divided into two elements of right and left, and the screw being had been not shown by use fixes right and left unit.Due to this
Individual reason, multiple screw bosses 430a to 430d are formed on in the outer housing forming main outer housing 402, and not by
Multiple screw is defined on other outer housings illustrated.Multiple screw bosses 431a and 431b are formed at outside handle in an identical manner
On cover 403.It addition, in the power tool of present embodiment, beater mechanism 419 and reducing gear 414 be received directly in by
In the main outer housing 402 that synthetic resin is made.But, they may be accommodated in the most cup-shaped housing being made of metal
In (hammer housing), and formed by integral forming process, and in housing may be accommodated in main outer housing 402 or be connected to main outside
Cover 402.
Trigger switch 407 permission workmans and pull trigger 406 so that produce open mode or closed mode, and with
Trigger 406 is made to shake centered by the shake axis 410 that front side is formed.Trigger switch 407 and there is rotary sampling switch mechanism, and
And by operation forwards/reverse selector bar 408, output shaft can be switched on forward (tightening direction) or reverse (unclamping direction)
The direction of rotation of 418.It is prepared to for adjusting motor 404 according to the amount of pulling of trigger 406 it addition, trigger switch 407
The variable power switch of revolution, but, it can also be prepared to simple off/on switches.Below installation portion 440,
Being mounted with the LED 447 for illuminating front portion, this front portion includes component to be tightened.
Reducing gear 414 is provided with multiple planetary gear 416, by rotary shaft 404a of these planetary gear 416 motors 4
It is connected to central gear 415, and multiple planetary gear 416 engages with the internal gear 417 being positioned at outer circumferential sides so that OK
Star gear can rotate around central gear 415 while rotating.Main shaft 428 is the component for making hammer 422 rotate, and
The rear end side of main shaft 428 is connected in multiple planetary rotary shaft to serve as planet carrier.As a result of which it is, by planet tooth
The rotational motion of wheel 416 is converted into the rotary motion of main shaft 428.Main shaft 428 is coupled to hammer into shape 422, and this by cam mechanism
Individual cam mechanism is organized on the external peripheral surface of main shaft 428 the V-arrangement cam path 426 of formation, at the inner circle weekly form hammering 422 into shape
The cam path 424 formed on face and the steel ball 425 engaged with these cam paths.
Hammer 422 is always pressed forward by spring 427, and when it is maintained at resting state, by steel ball 425 with convex
Joint between race 424 and 426, its end face being arranged on distance striking arm 421 has the place in gap.Additionally, at hammer 422
At two parts on the Plane of rotation relative to each other of anvil 420, define the hammer pawl 423 serving as protuberance with being mutually symmetrical
With striking arm 421.When main shaft 428 is driven in rotation, by cam mechanism, revolving force is transferred to hammer into shape 422, and makes hammer
Before 422 half rotate, the hammer pawl 423 of hammer 422 is engaged so that anvil 420 rotates with the striking arm 421 of anvil 420, and now, when
By engage repulsive force main shaft 428 and hammer 422 between produce rotate against time, hammer 422 while compression spring 427 start
Cam path 426 along cam mechanism retreats to motor 4 side.
When hammer pawl 423 is crossed striking arm 421 by the setback of hammer 422 and thus released the joint shape of two components
During state, the counteracting force of the elastic energy that hammer 422 is accumulated in by spring 427 and the counteracting force of cam mechanism and main shaft 428
Revolving force while the most quickly forward accelerates, due to moving forward by pressure of spring 427 so that logical
Cross permission hammer pawl 423 striking impact arm 421 forcefully to make anvil 420 rotate.Output shaft 418 is connected to the front side of anvil 420, and
And output shaft 418 is inserted into axis hole 801.The top of output shaft 418 is exposed to the outside of main outer housing 402.As described above,
Anvil 420 given either continuously or intermittently rotates.
By being attached to the tip end tool (having been not shown) of the installing hole of output shaft 418, rotary impact power is passed to spiral shell
Nail.Thereafter, repeat identical rotation and blasting operation, and, such as, the fastening member of such as screw etc is threaded into not to be shown
In the component to be fastened of the such as timber or the like gone out.It addition, in the present embodiment, due to output shaft 418 and anvil 420
Produced by integral forming process, be not resulted in rattle sound the most between the elements so that can realize having good
Rigidity and in terms of impact sound quiet percussion tool.
Figure 25 is the exploded perspective view representing the package assembly near the impact portion of Figure 24.In the present embodiment, change
Enter locking ring 438 and support the fixed structure of carrier 433, this carrier 433 output shaft to be attached to 418.It is positioned at locking
The carrier 433 of the inner circumferential side of ring 438 is organized into two individual members of right and left.In anvil 420, define diametrically
Two striking arms 421 extended, and anvil 420 and output shaft 418 be integrally formed.
Locking mechanism is the mechanism for avoiding anvil 420 to rotate relative to main outer housing 402 and locking ring 438.Locking mechanism
Pin is engaged including relief surface 420a in the part being formed at anvil 420, carrier 433, locking ring 438 and two
437a and 437b.The centrage Y engaging pin 437a with 437b is parallel with axis X.Can make two engage pin 437a and 437b with
Locking ring 438, anvil 420 contact with carrier 433.
Carrier 433 is used as discharging the carrier component of the lock-out state of locking mechanism.Carrier 433 is organized into filling
Separate component 433a and 433b when two splits.Going out as shown in Figure 27, separate component 433a and 433b is each
From there is semi-cylindrical shape, being divided into the component of two parts along the divisional plane W serving as border in the horizontal.
Hammer 422 is produced to have predetermined quality in the integral forming process of metal, and it passes through cam mechanism
It is coupled to main shaft 428.In the front side of hammer 422, two parts in a circumferential direction form hammer pawl 423.Be prepared to for
Each in the hammer pawl 423 of the protuberance of the second shock surface that formation to be impacted by striking arm 421 is prominent to extend forward,
And it is provided with shock surface 423a rotating forward on direction, and is provided with shock surface in the reverse rotation direction
423b, shock surface 423a and shock surface 423b are formed on two sides the most in a circumferential direction.In this manual,
By in the direction rotating forward direction and refer to such as tighten screw or bolt, and reversely rotate direction and refer to unclamp screw
Or provide explanation on the premise of the direction of bolt.In each in the hammer pawl 423 of present embodiment, define at collimeter
Shock surface 423c that the inner circumferential side of face 423a is formed, that serve as the second shock surface, and in an identical manner, in impact
The inner circumferential side of surface 423b defines shock surface 423d.Second shock surface is prepared to exist relative to the first shock surface
Recess on peripheral impact direction.In this case, hammer pawl 423 can not only have diametrically opposed prominent in hammer 422
Shape but also there is diametrically prominent shape, and the shape all highlighted on radial and axial.
Anvil 420 is the component of hammer 422, forms anvil 420 and makes output shaft 418 be connected to the tip side of anvil 420, and
These components produce with integral forming process.Anvil 420 is provided with in the main body being formed at its cylinder, to stretch from it diametrically
Two striking arms 421 that the mode gone out is formed.Two striking arms 421 are formed at be separated from each other in the anglec of rotation 180 degree and phase
To position, and striking arm 421 stretch out diametrically with hammer pawl 423 engage.Owing to it is as to be impacted
The feature of component, each in striking arm 421 has, at it, the square column shape stretched out from anvil 420 in shape, but, it is not
It is limited to this shape and this shape can be basic configuration or other simple shape of cylindricality, as long as ensure that enough strong
Degree and ruggedness.For each striking arm 421, it is important that have and be prepared to the plane corresponding with shock surface
Or two impacts of shape stand in surface, and surface in a circumferential direction one and stand table forming impact forward
Face 421, and another surface in a circumferential direction forms impact in contrary direction and stands surface 421b.It is being separated from each other
At each of two parts of the main part of the anvil 420 of 180 degree, by becoming plane to form relief one Partial Resection
Surface 420a.
Outer placing at anvil 420 and output shaft 418 arranges locking ring 438.The major function of locking ring 438 is rotatably
Support carrying frame 433.Carrier 433 is organized into two separate component 433a and 433b.Output shaft 418 is by near locking ring
The Bearning mechanism of 438, i.e. be pivotably supported by the bearing 229a in Figure 24.Being radially separated from each other of locking ring 438
In two parts of 180 degree, define protuberance 438a and 438b.Protuberance 438a and 438b corresponds to the first engaging piece.Prominent
Going out portion 438a and 438b is the protuberance that two positions of 180 degree are formed that is separated from each other on the circumferencial direction of locking ring 438.Logical
Cross in the recess 800 that protuberance 438a and 438b is installed to be formed on the inner circumferential surface of main outer housing 402, it is to avoid locking
Ring 438 and main outer housing 402 relatively rotate centered by axis X.In a circumferential direction, in two positions with predetermined space
Place forms recess 800.Recess 800 is corresponding to the second engaging piece.
As for the first junction surface and the second junction surface, allow locking ring 438 and main outer housing 402 in predetermined angular range
The structure rotated against, it is possible to use structure subsequently.I.e., it is possible to form recess in locking ring 438 side, and can be outside master
The inwall side of cover 402 forms protuberance.Furthermore, it is possible to be on locking ring 438, form recess and protuberance, and can be at main outer housing
Recess and protuberance is formed on 402.
Carrier 433 serves as locking release component, and it has by two separate component 433a and 433b combinations
After define the structure of cylinder form substantially.But, in the present embodiment, by two separate component 433a and
433b realizes single carrier mechanism, and wherein component 433a and 433b is by along including that cylindrical member is divided into by axial plane
Two parts and formed.Carrier 433 is coaxially disposed relative to anvil 420, and it is arranged on outside anvil 420 diametrically
Portion.Carrier 433 is not attached to anvil 420, and is attached to anvil 420, with relative to anvil 420 coaxially, at predetermined angle model
(rotatable) can be relatively moved in enclosing.Carrier 433 has cylindrical portion, and this cylindrical portion has the cylinder being substantially equal to anvil 420
The internal diameter of the external diameter in shape portion.In this case, gap is maintained at permission carrier 433 and anvil 420 rotates against required
Degree.Two positions on the rear portion of the cylindrical portion of carrier 433, define recess (the second cut portion).Additionally, holding
Also form protuberance 434a and 434b on carrier 433, wherein protuberance 434a and 434b is diametrically from the circle of each recess
Two edges (two ends) in circumferential direction highlight.Gap between protuberance 434a and protuberance 434b is designed to Charpy
Arm 421 width diametrically is somewhat broader.In the present embodiment, owing to two striking arms 421 are from the cylindricality of deviation anvil 420
The position in 180 degree of post portion be outwardly formed, therefore protuberance 434a and 434b is formed at four positions altogether, i.e. with accordingly
Impact stand the relative position of surface 421a with 421b.
Protuberance 434a and 434b contact by newly-increased shock surface 423c with 423d being added to hammer into shape 422 passes through by collimeter
Face 423c and 423d impacts, thus it is possible to vary carrier 433 is relative to the position of anvil 420.But, the angle of rotation is about 10
Or+10 degree.On the position relative with relief surface 420a of carrier 433, formed in cut portion 435b and 435d is each
Individual.Define cut portion 435b and 435d to define the space accommodating joint pin 437a and 437b.
The inner circumferential side in each space is covered with relief surface 420a of anvil 420, and the outer circumferential sides in this space is covered
It is stamped cylindrical portion 438d of locking ring 438.The front side in this space is coated with the inside flange 438c of locking ring 438, and should
The rear side in space and two edges cover diametrically have the wall portion of cut portion 435b and 435d.Inside flange 438c is at lock
It is formed annular shape on the one end of cylindrical portion 438d determining ring 438.
In this way, engage pin 437a and 437b and be arranged on the space defined by use cut portion 435b and 435d
In, and rotate in the way of being allowed to the rotation to follow anvil 420.When stopping anvil 420 based on motor 404 and carrier
Relative position between 433 diametrically slightly offset from time, engage pin 437a and 37b serve as limiting anvil 420 and locking ring
The locking mechanism rotated against between 438.Will be described in this lock function after a while.
Figure 26 is the partial sectional view representing the amplification near the locking ring 438 of Figure 24.Carrier 433 is along axis X
It is arranged on direction between hammer 422 and bearing 429a.A part for the placement position of carrier 433 and the placement position of anvil 420
Overlapping.The top of carrier 433 makes its front be limited by the inside flange 438c of locking ring 438, and its excircle
Side is supported by cylindrical portion 438d, and its inner circumferential side is supported by the external peripheral surface of anvil 420.Attached at the center of the rear end side of anvil 420
Closely, form the installing hole 420b with cylindricality, and in this hole, contain the installation formed on the top of main shaft 428
Axle 428a.
By this way, owing to the rear end of anvil 420 and the front end of main shaft 428 are rotatably supported thereon, therefore can
Enough beater mechanisms 419 realizing there is higher stiffness.Locking ring 438 has inside flange 438c and is formed at cylindrical portion 438d
Structure on the inside of front side, and at the rear side of cylindrical portion 438d, after outside flange 438e is formed at cylindrical portion 438d
Outside in portion.At the other end of cylindrical portion 438d, outside flange 438e is formed annular shape.Although locking ring 438
It is fixed to main outer housing 402, but when being driven by motor 404, it is allowed to engage pin 437a and 437b together with anvil 420 to rotate
Rotate centered by axis, go out as shown in Figure 25.Protuberances etc. are the most in the axial direction in engaging pin 437a and 437b
Each top engaging pin is formed, to avoid carrier 433 to become the highest relative to the frictional resistance of locking ring 438.
The bearing 429a of such as ball bearing or the like is formed in the front side of locking ring 438.The rotatable twelve Earthly Branches of bearing 429a
Hold output shaft 418, and the inner circumferential surface of bearing 429a is contacted with output shaft 418, the excircle of its middle (center) bearing 429a
Surface is supported in the inner wall section of main outer housing 2.Two screw bosses 430a radially it are externally formed with at locking ring 438
And 430b.In this 4th embodiment, prepare such position relationship, in this position relationship, when looking up from axle
Time, screw bosses 430a and 430b are completely or partially included in and are arranged within the scope of locking ring 438.
I.e., it is assumed that along the direction of axis X, the length of locking ring 438 is " L " in the accompanying drawings, fixes with by screw
Corresponding screw bosses 430a in position and 430b be arranged to when looking up from axle by overlapping or be included in length L
Within the scope of.As a result, it is possible to keep the locking being clamped, being divided into right and left component by main outer housing 402 with higher precision
Ring 438, and according to the size of main outer housing 402, locking ring 438 can be firmly fixed and also can be fixed to can be
Relatively rotate in predetermined angle.Additionally, according to the viewpoint in space, locking ring 438 excircle diametrically is for shape
It is favourable for becoming in screw bosses 430a and 430b.
In the inner side on the top of output shaft 418, it is perpendicular to be axially formed the installing hole 418a inserting tip end tool, installs
Hole 418a has hexagonal shape on its section, and wherein the installation portion 440 for tip end tool is formed at the cylindrical on top
All sides.Defining through hole 418b in the side of output shaft 418, this through hole 418b accommodates the ball 443 being moved in, and
Through hole 418b is formed to avoid ball 443 depart from from through hole 418b and fall in the shape of inner circumferential side.Ball 443 radially
On outside supported by sleeve 441, sleeve 441 is exerted a force thereon by spring 444.The front side of spring 444 is solid by packing ring 442
Determine, and packing ring 442 is supported to move the most in the axial direction by C-shaped ring 445.Tip end tool is attached to output shaft 418 or from
When output shaft 418 is dismantled, it is moved forward to sleeve 441 from the normal position shown in Figure 26 in the axial direction resist spring 444
Force so that perform attachment or disassembling section.When sleeve 441 is moved forward, by the excircle of each in ball 443
Portion discharges from the adjacency state of convex surface being formed and continuing in a circumferential direction with the inner circumferential side at sleeve 441, its knot
Fruit is that ball 443 becomes can be displaced outwardly diametrically, therefore, it can not perform with there is no any resistance tip end tool attachment and
Unloading process.
Figure 27 is the sectional view that the A-A part from Figure 26 is observed.This 4th embodiment is characterised by, locking ring 438
Do not utilize the structure that locking ring 438 is affixed directly on outer housing by screw, but have and by main outer housing 402, locking ring 438 is pressed from both sides
The structure lived.Although carrier 433 has the shape of cylinder as its basic structure, but it is set in the present embodiment
Count into and have by along including axial plane, i.e. be positioned at the divisional plane near arrow C and D and cylindrical member is divided into two
The shape that part is formed.In the starting stage of exploitation, inventor's design makes separate component 433a and 433b one-body molded
Becoming a unit, wherein locking ring is secured directly on main outer housing.But, after this structure is performed test, find
Most likely result in problem during operation.Before explaining the feature of present embodiment, with reference to Figure 32 A and 32B, retouching subsequently
State and will explain situation when there are these problems.
Figure 32 A and 32B is the sectional view representing the structure utilizing screw to be fixed on outer housing by locking ring, wherein, and Figure 32 A
It is the sectional view corresponding with the A-A part of Figure 26, and Figure 32 B is the sectional view corresponding with the B-B part of Figure 26.Opening
In the starting stage sent out, inventor's design makes carrier 533 form as one shape, i.e. figure 25 illustrates is separate
Component 433a and 433b is incorporated into the shape in an integrated unit, and utilizes two screw 532a and 532b by locking ring
538 are fixed on outer housing 502.Outer housing 502 is organized into two separate components, i.e. structural elements 502-1 in left side and
Structural elements 502-2 on right side.Along the division surface W serving as border, structural elements 502-1 and 502-2 is divided into two structures
Part, and structural elements 502-1 and structural elements 502-2 is fixed to one another.
In this case, locking ring 538 is provided with two protuberance 538a and 538b the most outwardly, and
And it is formed on female screwhole respectively.Locking ring 538 fixing for two screw 532a and 532b is utilized to also function as fixed knot
The fixing component of structure component 502-1 and 502-2.In Figure 31 B, install in the way of identical with shown in fig. 24 example
The bearing 429a of such as ball bearing or the like.
After inventor carries out operating operation test about this structure, the problem finding to create subsequently.Although locking ring
538 firmly fix with two screw 532a and 532b, but the bearing 429a of supporting output shaft 418 is by outer housing 502
Wall supports.But, in this structure, locking of being caused due to some problem in machining accuracy, assembly precision etc.
Determine ring 538 occurs in the case of axial deviation, the locking machine that carrier 533 may be biased to cause in this case
Fault subsequently in structure.Such as, owing to carrier 533 is supported on anvil 420, wherein carrier 533 and locking ring 538 it
Between be provided with gap, therefore the anvil 420 deviation in terms of precision tends to lead to the deviation in carrier 533.
Therefore, in the present embodiment, go out as shown in Figure 27, prepared such structure, in the structure shown here will
Carrier 433 is separately to be organized into two separate component 433a and 433b, and designs locking ring 438 with relative to structure
Component 402-1 and 402-2 is loosely retained.At the structural elements 402-1 in left side with in the structural elements 402-1 on right side
Portion, and the part of protuberance 438a and 438b vicinity relative to each other, define recess 405a and 405b, and it is the most within it
Side section has square shape.The inner shape of recess 405a and 405b be formed with in protuberance 438a and 438b
The square shape substantially of each roughly the same, but, go out as shown in Figure 27, they are quilt in the way of loose
Keep to arrange predetermined gap between which.In figure 27, in order to be better understood from the present invention, illustrate in the way to enlarge
Gap.
In this case, screw 432a and 432b is utilized to fix right and left structural elements 402-1 and 402-2.Therefore, lock
Determine ring 438 to be clamped by right and left structural elements 402-1 and 402-2 simply, and without using as being used for fixing right and left knot
The function of the component of structure component 402-1 and 402-2.As a result, it is possible to will relative to the output shaft 418 supported by bearing 429a
Locking ring 438 correctly align center.
Additionally, due to carrier 433 is also designed to be organized into two separate component 433a and 433b, therefore align
Deviation occurs hardly, such that it is able to relative to anvil 420 and output shaft 418 smoothly operate two separate component 433a and
433b.It addition, in the present embodiment, the external shape of protuberance 438a and 438b is formed square column shape substantially, but
It is that it can be formed cylindricality, polygon or another shape wanted.In that case it is important that by recess
The interior shape of each in 405a with 405b is formed as corresponding with the shape of each in protuberance 438a and 438b
Shape, and it is equally important that in the way of loose, form them to provide predetermined gap wherein.
Two screw 432a and 432b are arranged on the outside of locking ring 438, Yi Ji centered by axis X diametrically
Position overlapping with the placement position of locking ring 438 along the direction of centrage X.Protuberance 438a and 438b is from locking ring 438
The prominent direction of external peripheral surface parallel with the tightening direction Z of two screw 432a and 432b.Protuberance 438a and 438b from
The direction that the external peripheral surface of locking ring 438 highlights is the direction at a right angle with divisional plane W.
Figure 28 is the solid of the shape of two separate component 433a and 433b representing the carrier 433 constituting Figure 25
Figure.Carrier 433 has cylindrical as its basic configuration, but, in the present embodiment, it has along with axially in parallel
The separated shape of plane.Carrier 433 is organized into separate component 433a and 433b, and it is formed with including as border
The division surface W of the axis X of output shaft 418.Two separate component 433a and 433b are bonded to form single carrier.?
In the case of two separate component 433a and 433b are designed to have plane symmetry or rotational symmetric shape, due to
They are for right or left side, and therefore two identical parts may be used for a pair, such that it is able to reduce production cost.
Figure 29 A and 29B is the view of the shape of the component 433a being denoted as single component, and Figure 29 A is radially
On from the axonometric chart of external observation, Figure 29 B be diametrically from inside observe axonometric chart.There is semi-cylindrical shape conduct
The separate component 433a of its basic configuration is provided with for accommodating cut portion 435b engaging pin 437a, and it is formed at substantially
Immediate vicinity on the circumferencial direction of semi-cylindrical shape.Two limits that protuberance 434a is respectively formed on its circumferencial direction
On edge.Protuberance 434a is formed through cut portion 435a being separated with 435c and curving it with the most outwardly
Shape, it is adjacent with protuberance 434a that its result is that cut portion 435a and 435 is formed.Cut portion 435a and 435c form one
Space, wherein striking arm 421 penetrates this space.In cut portion 435a and 435c, formed hole 435e and 435f, hole 435e and
435f each has circle substantially.This some holes 435e and 435f are formed to avoid separate component 433a is caused damage,
This damage is caused by protuberance 434a pressure applied, and this pressure concentrates on the specific part of protuberance 434a, i.e. collection
In near coupling part between cut portion 435a and 435c, and have tool by each allowing in 435e and 435f of hole
Have the R type shape of suitable radius of curvature R, can suitably disperse will to from protuberance 434a and 434b to cut portion 435a and
The pressure that the converter section of 435c applies.
Figure 30 is to represent regarding of state in the case of performing manually fastening work when stopping percussion tool 401 when
Figure, and it is corresponding with the sectional view of the A-A part representing Figure 26.Figure 30 illustrates when carrier 633 is formed integral product
Time contingent problem.When workman as by indicated by arrow 640 when utilizing hands to rotate main outer housing 402, engage pin 437a
Rotating in a same direction with 437b, its result is to change to engage connecing between pin 437a, 437b and relief surface 420a
Touch position.Therefore, the anvil 420 rotation relative to locking ring 638 is prevented, to form lock-out state.With reference to Figure 31, retouching subsequently
State the principle that explanation is caused this lock-out state.
Figure 31 A to 31B is that the anvil 420 of the A-A section view position being described in Figure 26 closes with the position engaged between pin 437a
The schematic diagram of system.Shapes and sizes might not be illustrated exactly.In the case of hammer 422 is rotated by motor 404, due to anvil
420 rotate, therefore in the way of allowing the impact of the shock surface 423a promotion striking arm 421 of hammer pawl 423 to stand surface 421a
Anvil 420 and joint pin 437a are rotated, and maintain the position relationship (locking off-position) in Figure 31 A.Work as output shaft
When 418 holdings are rotatable, engage pin 437a and form locking off-position relative to the position of the relief surface 420 of anvil 420.
In this location status, engage pin 437a and be located substantially in the vertical direction (circumferencial direction) of relief surface 420a
Center.I.e., it is assumed that the width that relief surface 420a is in vertical direction (circumferencial direction) is 402c, anvil 420 sells 437a with engaging
Between contact point 472 be positioned at distance " c " and on the position of following " c " above.That is, contact point 472 is positioned at relief table
The center V of face 420a.In this case, from center of rotation 471 to the cylindrical of each engaged pin 437a and 437b
The maximum distance of perimeter surface is indicated by R1.R1 is expressed as described:
R1=(radius of anvil 420)-(resection of relief surface 420a)+(engaging the diameter of pin 437a) is in this enforcement
In mode, by R1 is set smaller than serving as the internal diameter of cylindrical portion 438d of the locking ring 638 of swinging member so that engage pin
437a is not intended to anvil 420 and the rotation of carrier 633.It addition, except the mistake self being tightened screw by rotary impact tool 401
Outside journey, even if the rotation of anvil 420 can also be locked in the case of release process.
In Figure 31 B, when workman rotates outer housing 601-1,601-2 by hand, anvil 420 is rotated relative to locking ring 638
Time, engage pin 437a be brought into in its position relationship that position relationship of relative movement is identical on the direction of arrow 474.
Therefore, the position making joint pin 437a and relief surface 420a contact with each other moves to Figure 31 B's from the contact point 472 of Figure 31 A
Contact point 475.That is, the position outside contact position 475 is located at the center V of relief surface 420a.
Therefore, Figure 31 A from the center of rotation 471 of anvil 420 to engage pin 437a external peripheral surface maximum distance from
R1 is changed to R2.As from accompanying drawing it should be understood that for R2, meet the position relationship of R1 ＜ R2 so that by arranging locking
The size of the internal diameter Rc of ring 638 is to meet the relation of R1 ＜ Rc ＜ R2, by the phase engaging pin 437a as shown in Figure 31 B
To the change in position relationship, engage pin 437a be allowed to clamp-on relief surface 420a of locking ring 638 and anvil 420 end it
Between, and locking ring 638 and anvil 420 be formed integrated unit and be allowed to serve as the locking mechanism of output shaft 418.
That is, when workman is in nothing operation in the case of rotary impact tool 401, owing to the rotation of anvil 420 is maintained at lock
Determine state, therefore can efficiently perform and manually fasten work.When output shaft 418 is non-rotatable, engage pin 437a relative to
The position of relief surface 420a of anvil 420 is maintained at the position of locking.
Now, Figure 30 is referred again to.In the example of Figure 30, locking ring 638 and outer housing 602-1 and 602-2 are held to
Do not rotate against.That is, utilize protuberance 638a and 638b of carrier 633 by formation on the inwall of outer housing 602-1 and 602-2
Recess 605a and 605b fixes with firm chimerism.In this case, it is easy to center of rotation and the anvil of carrier 633 occur
Axial dipole field between the center of rotation of 420, and when axial dipole field is bigger, as in Figure 30 by the part indicated by arrow E
Shown, engaging pin 437a may be separated with in relief surface 420a.In this case, lock-out state is only
Being kept by the joint pin 437b that contacts with another relief surface 420a, its result is above the power of normal twice and is not required to strategic point and executes
It is added in joint pin 437b side.
Therefore, in the present embodiment, the recess being formed on the inner surface of outer housing and the protuberance being formed on carrier
It is not fixed to one another securely, and go out as shown in Figure 27, define in a circumferential direction between recess and protuberance
Gap.By locking ring 438 being loosely fixed to main outer housing 202, engaging pin 437a and engaging between pin 437b, the most only
One be engaged by locking in component.Then, owing to the engagement member of locking pushes out locking ring 438, therefore another engages structure
Part is near locking ring 438 so that two locking components are the most locked.That is, locking ring 438 is so that the axle center of locking ring 438
Automatically moved with the mode of the axle central contact of output shaft 418, thus, it is possible to obtain so-called automatic shaft center adjusts effect
Really.Therefore, though the axial dipole field that there occurs between axial dipole field or output shaft 418 and the locking ring 438 of carrier 433, also
Not to engaging the produced impact of pin 437a, 437b side transmission so that can be effectively prevented and rotate unsuccessfully and lock unsuccessfully.
As described above, in the present embodiment, when passing through rotary impact tool 401 after stopping motor 404
When performing manually fastening work, anvil 420 is locked into by the function of locking ring 438 non-rotatable relative to locking ring 438, makes
Output shaft lock function must be achieved, therefore, even if in the case of power tool is used for performing to impact fastener cycle, it is also possible to
Perform easily manually to fasten work.Even if additionally, in work from the tightest by using the fastening work in driving source to transfer to
Gu in the case of Gong Zuo, the most do not need the special operational of such as workman's pull operation carrying out bar or the like, and only need letter
Single ground rotary impact tool 401 so that the most convenient power tool used can be realized.Even if additionally, completing this hands
After dynamic fastening work, in the case of the execution fastener cycle for next screw, by simply pulling on trigger 406
Rotation motor 404, and in this case, owing to needing not try to manually fasten work locked by use output shaft
And switch between the fastening work of motor 404 by using, therefore can realize for the use that can realize side really
Just power tool.
Embodiment 5
With reference to Figure 33 and 34, the 5th embodiment described explaining the present invention subsequently.Figure 33 is to represent wherein to
Locking mechanism according to the present invention is applied to the view that driver bores the example of 701.Figure 33 is also to represent and the second embodiment
The sectional view on the top of relevant electric tool (driver bores 701).The driver brill 701 with motor 704 is provided with outside master
Cover 702, motor 704 is accommodated within portion by it；Reducing gear unit 710, it makes the rotation of motor 704 with predetermined deceleration ratio
Rotary speed reduces；Clutch mechanism 720, it is arranged on the front side of reducing gear unit 710；And output shaft 731, it extends to
The front side of clutch mechanism 720.The tip side of output shaft 731 it is formed at for being attached the installation unit 740 of tip end tool, and
The hexagonal hole 731a on its section with hexagonal shape is formed at its inboard portion.As motor 704, it is possible to use with
The motor that the motor 404 that uses in the first embodiment is identical, and the structure of the rear side of motor 704 is formed and first
The structure that structure in embodiment is identical.
Reducing gear unit 710, it reduces the rotation of motor 704 by planetary gears the most multistagely
Input, its to clutch mechanism 720 transmission produce input, and this structure use such as three grades of types planetary gear.
The first planet gear 713 serving as the first little gear is attached to rotary shaft 704a of motor 704 so that first planet gear
712 are rotated by first planet carrier 713.In the outer circumferential sides of first planet carrier 713, the second planetary gear 714 revolves
Turn.Second planetary gear 714 is supported by the second planet carrier 715.Place at the second the outer of planetary gear 714, third planet
Gear 716 rotates.Third planet gear 716 is connected to third planet carrier 717, and third planet carrier 717 is connected to set
Put the installation axle of the rear side of output shaft 731 in front side.Third planet gear 717 is corresponding with carrier component.
In this case, on the coupling part between output shaft 731 and third planet carrier 717, have substantially
The socket 733 of cylinder form and multiple pin 737a and 737b are arranged on the same axis, and each in above-mentioned pin has
There is cylindricality substantially.Pin 737a serves as the first engagement member, and sells 737b and serve as the second engagement member.In this way, due to
The planetary gear reducing mechanism of three grades of types is used as reducing gear unit 710, even if therefore comparing when the output of motor 704
For less, it is also possible to transmit enough screw-down torques to output shaft 731.Subtract additionally, high speed/low speed switching mechanism is arranged on
In speed mechanism unit 710 so that by using its action bars 708, ring gear 718 can be moved with forward/backward so that permissible
Amendment deceleration ratio.
At the installed in front clutch mechanism 720 of reducing gear unit 710, it is applied at predetermined load torque
The rotation transmission between reducing gear unit 710 and output shaft 731 is discharged during tip end tool.Clutch mechanism 720 includes being formed
The part of the gear housing 725 of cylinder form, the pressing formed on the outer circumference, front side of gear housing 725 are stirred
Nut 722, spring 723 and the clutch ring 721 exerted a force by spring 723.Gear housing 725 is corresponding with housing.Additionally,
Clutch mechanism 720 includes: pin 726, and it extends rearwardly through the through hole of gear housing 725 from clutch ring 721；And arrange
Ball 728 at the rear side of pin 726.Gear housing 725 is arranged on the inside of main outer housing 702.
Additionally, clutch mechanism 720 includes: recess (clutch claw), it has been not shown, and it is formed at ring gear 719
Front side；And driver plate 724, it is for adjusting when the rotation transmission discharged between reducing gear unit 710 and output shaft 731
The size of the load torque caused.Driver plate 724 has the some keys (highlighting) formed therein, and it the most inwardly prolongs
Stretch, and can be with rotary dial nut 722 by allowing key to be assembled in groove, wherein groove is formed at and stirs the axial of nut 722
On some positions.Driver plate 724 can generate by using the resin of such as plastic material etc.
Screw thread (pin thread) is formed in the front half side outer circumference portion of gear housing 725, and have will be formed at
The nut 722 of stirring of the cylindrical shape of the screw thread that the threaded portion in its inner circumferential side engages is attached at outside gear housing 725
Circumference.Helical spring 723 be formed on the protuberance diametrically of the front end stirring nut 722 and clutch ring 721 it
Between.When screw-driving process proceeds, makes the load being applied to output shaft 731 exceed pressing to serve as the annular of fixed gear
During the thrust of the spring 723 of the stationary state of gear 718, be formed at recess that the front side of ring gear 718 has been not shown (from
Clutch pawl) push away forward ball 728 and clutch ring 721 so that and the stationary state of ring gear 718 is released and causes annular tooth
Wheel 718 rotation.The rotation of ring gear 718 brings a kind of state, in this condition, from the rotation of motor 704 not to defeated
Shaft 731 transmits so that have activated clutch mechanism 720.
Rotation transmission quilt after activating clutch mechanism 720, between reducing gear unit 710 and output shaft 731
During release, the size of load torque can be adjusted by revolving dial 724.It should be noted that in fig. 33, in order to easily manage
Solve this structure, show in the separate mode in the upper side and lower side of axis X and stir nut 722.But, it practice, dial plate
Nut 722 is the component with cylinder form, is continuously connected in the upper side and lower side of this shape axis X.At figure
In 33, the released moment of torsion causing clutch mechanism 720 to maximum level of nut 722 is stirred with representing in the upside from axis X
The section of the state that capacity is minimized is corresponding.That is, clutch mechanism 720 is closed, and does not the most pass
Torque delivery.In contrast, the downside from axis X and expression are stirred nut 722 and are screwed to maximum level and cause clutch machine
The section of the state that the torque capacity of structure 720 is maximized is corresponding.That is, clutch mechanism 720 is in and can transmit moment of torsion
Open mode.
Figure 34 is the sectional view of the G-G portion intercepts along Figure 33.It is rotated through reducing gear unit by what motor 704 produced
710 are passed to third planet carrier 717.By synchronously rotating third planet carrier 717, it is placed on output shaft 731
Rearward end on outer circumferential sides, i.e. the socket 733 of the inner circumferential side being placed on third planet carrier 717 is rotated.At it
The installation axle (having been not shown) on section with square configuration is formed on the rear end of output shaft 731, and is formed at socket 733
On the hole of square configuration be installed to axle is installed.Additionally, by the output shaft that ring is installed to the rear side of socket 733 will be stopped
731, socket 733 is supported for as not being moved rearwardly.
In the case of rotary jack 733, between third planet carrier 717 and output shaft 731, by revolving at forward
Turn and synchronize via the multiple protuberance 733b formed on socket 733 and pin 737b being arranged to be formed rear portion when side rotates up
Ground rotating output shaft 731, driving force is passed to the tip end tool of such as fixture etc.Here, ought observe in a rotational direction
Time, the pin 737a of the first engagement member serving as the front side being arranged on protuberance 733b rotates while being pressed by protuberance 733b.
On the circumferencial direction of socket 733, relief surface 733a is formed at the both sides of each in protuberance 733b.At lock
Determining ring 738 radially, the distance between the inner circumferential surface of each relief surface 733a and locking ring 738 becomes maximum.Lock
The shape determining the inner periphery that ring 738 has cylindrical shape and locking ring 738 is formed positive round.Make pin 737a and 737b
In the case of both rotate while two side contacts with each protuberance 733, owing to pin 737a and 737b is positioned at relief surface
The center of 733a, therefore they nonintervention output shafts 731 and the rotating against of locking ring 738.
After motor 404 being stopped, when workman is manually revolved on the direction of arrow 750 relative to tip end tool
When turning main outer housing 702 to perform manually fastening work, by the revolving force from tip end tool side in the side contrary with arrow 750
The most relatively move socket 733.Now, although the pin 737a in front side is not relative to each protuberance 733b in a rotational direction
Mobile, but move while being pressed by protuberance 733b at the pin 737b of rear side, and therefore it is kept and is positioned at relief table
The center of face 733a.Therefore, be changed in the position that arranges relative to protuberance 733b of the pin 737a of front side, therefore, based on
With reference to the identical principle described by Figure 31 A with 31B, three pin 737a in front side are sandwiched in locking ring in a circumferential direction
Between 738 and socket 733.The distance in this gap external diameter less than each pin 737a.Therefore, by being applied to pin 737 and locking ring
Frictional force between the internal diameter of 738, locking ring 738 and output shaft 731 are brought into lock-out state.In this second embodiment, exist
Four prominent radially outward protuberance 738b are formed on locking ring 738, and protuberance 738b is supported in and is formed at
In the recess 725b of the inner circumferential side of gear housing 725.Here, protuberance 738b is not fixed firmly to recess 725b, but
As being fixed to the upper with gap by having on the radial direction indicated by arrow J and I in accompanying drawing and/or circumferencial direction.With this side
Formula, by arranging gap, locking ring 738 can relative to socket 733, output shaft 731 and third planet carrier 717 correctly
Center alignment.Therefore, it can smoothly operate locking ring 738.It addition, in Figure 34, only give recess 725b arrow J in downside
And I, but, as upside, the small gap set by utilization smoothly performs installation process.In Figure 34, in order to hold
The readily understood present invention, by the gap indicated by arrow J and I represent more slightly larger than actual size.But, at actual product
In, it is provided for the minimum clearance needed for solving centre deviation problem in the conventional structure as described by reference Figure 32 and is sufficient for
?.
In this way, it is possible to be modified to locking ring 738, main outer housing 702 and the fixing means of gear housing 725.Locking
Ring 738 constitutes the locking mechanism between output shaft 731 and third planet carrier 717.This is utilized to arrange, by using horse
When reaching driving, the rotation of output shaft 731 is not intervened, and when manual fastener cycle, locking ring 738 is made by smoothly operation
Can be provided in the power tool that ruggedness aspect is advantageous.
According to the present invention, output will can be arranged on the locking component that the first engagement member and the second engagement member contact
The periphery of axle, with the most fine moving at output shaft so that outer housing rotates and output shaft when being fixed, and makes locking component
Contact with the first engagement member and the second engagement member to allow the first engagement member and the second engagement member to move to locking bit
Put.Rotate and wrong therefore, it is possible to be effectively prevented from the mistake owing to the axial dipole field between locking component and output shaft is caused
Maloperation, and it is achieved that the power tool with latch-up structure that can operate in a stable manner.
According to the present invention, outer housing is formed separate two structural elements of plane along the centrage including output shaft,
And the second junction surface is formed in each in structural elements so that when by two structural elements combinations with one another, support
Locking ring.Therefore, there is can avoid being caused due to the axial dipole field between locking component and output shaft mistake rotation with imitating
And faulty operation, and it is achieved that the power tool with latch-up structure that can operate in a stable manner.
According to the present invention, outer housing is formed separate two structural elements of plane along the centrage including output shaft,
And the second engaging piece is formed in each in structural elements so that when by two structural elements combinations with one another, support
Locking ring.Therefore, it is possible to by an assembling process by two structural elements combination with one another support locking components easily.
According to the present invention, two positions of 180 degree of being separated from each other on the circumferencial direction of locking component form first and nibble
Conjunction portion, and the second engaging piece is formed on structural elements respectively.Therefore, resin forming technique is utilized to be formed by combination
Two structural elements, can the most fixedly locked component.
According to the present invention, among multiple screws, two screws are formed at the outside of locking component diametrically, wherein this
Two screws are arranged on the position overlapping with the placement position of locking component.Therefore, it can saving be specifically designed to and arrange this
The space of two screws.Furthermore, it is possible to utilize predetermined power to clamp locking component.
According to the present invention, it is formed between locking component and axis hole owing to being used for being pivotally supported the bearing of output shaft, because of
This can stablize the rotation status of output shaft.
According to the present invention, between being formed between the first engaging piece and the second engaging piece on outer housing on locking component
Gap.Therefore, enabling axial dipole field occurs between locking component and output shaft hardly, and it is achieved that has relatively
High reliability and the locking mechanism of stable operation.
According to the present invention, in locking component, the protuberance with square column shape is formed at the external peripheral surface of cylindrical portion.By
In this reason, by least one in the pre-cut technique of use integral forming process and metal, can produce easily
Locking component.Additionally, form gap between the protuberance and the recess of outer housing of locking component.Therefore, the protuberance institute of locking component
The precision needed is the highest, and can reduce production cost.
According to the present invention, the bearing of trend making the protuberance of locking component is parallel with the tightening direction of screw, and makes locking
The bearing of trend of the protuberance of component is vertical with the disconnected position of outer housing.Therefore, locking component can be formed satisfactorily
Shape and layout are with by the housing supports utilizing separate structural elements to be formed so that can realize can being assembled easily and give birth to
The power tool produced.
According to the present invention, in a part of the external peripheral surface that the relief surface with flat shape is formed at anvil, and
The cut portion of carrier component it is formed at for limiting the engagement member rotated against between anvil and locking ring.Therefore, may be used
With by using simple structure to realize the locking mechanism of output shaft.Output shaft locking mechanism can be realized and not by routine anvil
Change so much with the basic structure of output shaft, and effectively can transmit moment of torsion to tip end tool.Additionally, extra manual
Tighten be operated in by use power in the case of the tightening and perform after work of component to be tightened, can be by using
Power tool performs this work.
According to the present invention, the relative rotation angle between carrier component and anvil go above predetermined angle so that from
In the case of the center on gap surface separates with engagement member, use lock-out state.Therefore, outside workman rotates simply
Cover, when being pressed on the material to be fastened by tip end tool, has locked output shaft easily.
According to the present invention, socket is formed on the coupling part between carrier component and output shaft, wherein first engages
Component and the second engagement member are arranged near the protuberance of socket member.When output shaft rotates, it is allowed to the first engagement member
All rotate together with socket member with the second engagement member.Relatively rotate pre-when output shaft stops at socket and locking component
In the case of determining angle, the relative motion of socket member and locking component is limited.Therefore, when output shaft rotates, can be by
First engagement member and the second engagement member are arranged at locking off-position.Additionally, output shaft stop rear output shaft relative to
In the case of outer housing rotates, output shaft can be locked easily.
According to the present invention, reducing gear, carrier component and socket member are accommodated in the housing of cylinder.Additionally,
The protuberance being formed on locking component and formation recess in the housing are installed each other.Therefore, even if using by metal system
In the case of the cylindrical housings become or the be formed from a resin power tool for receiving reducing gear, clutch mechanism etc.,
The supporting structure of locking mechanism can be used.
As described above, have been based on embodiment and describe the present invention.But, the present invention is not implemented by these
The restriction of mode, and it can be carried out the various amendment purport without departing from the present invention.Such as, by the 5th embodiment party
Formula is described as illustrating the electric tool using electro-motor as the bending types of power source.However, it is possible to by the present invention
It is applied to the power tool not having bending mechanism.Additionally, the 5th embodiment has been described as illustration there is machinery system
The percussion tool of the beater mechanism of system and driver are bored.However, it is possible to apply the invention to oil pulse system in an identical manner
Percussion tool, the percussion tool of electronic impulse system or other the tightening tool of system.Additionally, for such as grinder and annular saw
Etc power tool, the structure of the application of the invention is as avoiding output shaft unclamping for fixing tip end tool
The locking mechanism rotated in the case of nut, it is possible to only by locking output shaft with hands supporting outer housing.
Industrial applicability
By using the driving source of such as electro-motor etc to drive output shaft to rotate, can apply the present invention to twist
The power tool of the tight such as fastening member of screw, nut or the like.
Claims (33)
1. a power tool, including: outer housing, it accommodates driving source；Hammer, it drives in a rotational direction by driving source；Anvil, its
Driven in a rotational direction when engaging with hammer；And locking mechanism, it is for whether locking the anvil rotation relative to outer housing
Carry out switch mode,
It is characterized in that, locking release component is rotatably disposed in anvil, and
When hammer rotates, before hammer with the joint of anvil, hammer into shape and lock release component and engages with the locking shape of release locking mechanism
State, and when hammer engages with anvil, locking release component can rotate between hammer and anvil.
Power tool the most according to claim 1, it farther includes:
Output shaft, it is rotated by described hammer；And
First engagement member and the second engagement member, its can latched position and locking off-position between move, Qi Zhong
It is coupled so that output shaft is non-rotatable with output shaft at latched position, makes output shaft rotatable at locking off-position,
Wherein, the first carrier component and second engaged respectively with the first engagement member and the second engagement member it has been respectively mounted
Carrier component,
When making described hammer rotate relative to output shaft by described driving source, described hammer and the first carrier component and second hold
Carrier component engages so that the first engagement member and the second engagement member move to locking off-position from latched position.
Power tool the most according to claim 1,
Described anvil is rotated continuously or with gap by described hammer,
Described outer housing accommodates described driving source, described hammer and described anvil, and described power tool makes to be connected to the output shaft of described anvil
Rotating, described anvil and output shaft are integrally formed, and
Described power tool farther includes:
Carrier component, it has cylinder, and it is attached to the most relatively to rotate relative to described anvil
Tiny angle, wherein output shaft is inserted into carrier component；
Locking ring, the external peripheral surface of its supporting carrier component；
Relief surface, it has flat shape, and it is formed on the external peripheral surface of described anvil；
First cut portion, it is formed on carrier component in the position relative with relief surface；And
Engagement member, it is formed in the first cut portion and limits rotating against between described anvil and locking ring, and holding
Carrier component is organized into two components, and these two components are separated on the circumferencial direction centered by the axis of output shaft.
Power tool the most according to claim 3,
Wherein, described carrier component has the internal diameter of the external diameter more than described anvil,
Described first cut portion is formed on said two component,
Described engagement member each has cylindricality, its being respectively set in described first cut portion one by one,
Each engagement member has the centrage parallel with described axis.
Power tool the most according to claim 4, wherein, said two component is of similar shape.
Power tool the most according to claim 3,
Wherein, during the stopping at described hammer described anvil relative to outer housing rotate and described relief surface center with
When described engagement member separates, by making described engagement member by the external peripheral surface of described anvil and the inner periphery of described locking ring
Surface is clamped, and described anvil is limited relative to the rotation of described locking ring.
Power tool the most according to claim 3,
Wherein, described carrier component has protuberance, and this protuberance stands, with the impact of described anvil, the direction phase that surface extends
Highlight abreast,
When rotating in described driving source, protuberance adjoins the hammer pawl of described hammer so that described carrier component is moved relative to anvil
Dynamic, and
Described carrier component is moved and is contacted with described engagement member so that described engagement member be arranged on described from
The center on gap surface.
Power tool the most according to claim 7,
Wherein, described first cut portion is by excising each in said two component and shape on the direction along described axis
Become,
The top of said two component it is formed on for accommodating the second cut portion of the striking arm of described anvil, and
Described protuberance the second cut portion from the circumferencial direction centered by described axis diametrically highlights.
Power tool the most according to claim 8,
Wherein, the first shock surface and the second shock surface are formed on described hammer pawl, and this first shock surface is used for impacting
Described anvil, and the second shock surface contacts with the described protuberance of described carrier component, and
Centered by described axis radially, the placement position of described protuberance and the placement position of the second shock surface that
This is overlapping.
Power tool the most according to claim 9,
Wherein, when described hammer rotates, described second shock surface is first adjacent with described protuberance to extrude described protuberance,
Described carrier component is rotated, and
Described first shock surface adjoins described striking arm subsequently so that described anvil rotates.
11. 1 kinds of power tools, including: outer housing, it accommodates driving source；Hammer, it is by driving source to drive in a rotational direction, and
It has the first protuberance extended along centrage；Axle portion, it can rotate relative to outer housing；Anvil, its have diametrically from
Outward extending second protuberance in axle portion, to engage with the first protuberance；And locking mechanism, it is relative for whether locking anvil
Rotation in outer housing carrys out switch mode,
It is characterized in that, locking release component is rotatably attached to anvil,
When hammer rotates, before the joint of the first protuberance and the second protuberance, the first protuberance connects with locking release component
Closing makes the lock-out state of locking mechanism be released,
The recess of the part accommodating locking release component is formed on the first protuberance, and
When hammer engages with anvil, locking release component can rotate between hammer and anvil.
12. 1 kinds of power tools, including: drive source；Hammer, it rotates by driving source；Anvil, it given either continuously or intermittently rotates by hammering into shape；
And outer housing, its receiving driving source, hammer and anvil, this power tool makes the output shaft being connected to anvil rotate,
It is characterized in that, anvil and output shaft are integrally formed,
Power tool is further provided with the carrier component of cylinder, and it is formed can be centered by the axis of output shaft
Circumferencial direction on rotate in predetermined angle relative to anvil, wherein output shaft is inserted into carrier, hammer engage with anvil time,
Carrier component can rotate between hammer and anvil；Locking ring, it limits carrier component and moves up in the side along axis；Plane
The relief surface of shape, in a part for its external peripheral surface being formed on anvil；First cut portion, it is formed at carrying framework
On part, and it is formed at the position relative with relief surface；And engagement member, it is formed in the first cut portion, with limit
Rotating against between anvil processed and locking ring.
13. power tools according to claim 12, wherein, described carrier component is formed with more than described anvil
The cylinder form of internal diameter of external diameter,
Described first cut portion is formed on multiple positions of carrier component,
Described engagement member each has cylindricality, and it is by being separately positioned in described first cut portion one by one, and
Each described engagement member has the centrage parallel with described axis.
14. power tools according to claim 13, wherein, at anvil described in described hammer withholding period chien shih relative to outside described
When cover rotates, rotating against between described anvil and described locking ring is limited.
15. power tools according to claim 14, wherein, the relative rotation between described carrier component and described anvil
When gyration goes above predetermined angle and causes the center of described relief surface to separate with described engagement member, described
Engagement member is sandwiched between the external peripheral surface of described anvil and the inner circumferential surface of described locking ring so that described anvil relative to
The rotation of described locking ring is limited.
16. power tools according to claim 13, it farther includes:
First protuberance, it is formed on described hammer；
Second protuberance, it is formed on described anvil and engages with the first protuberance；And
3rd protuberance, it is formed on described carrier component, in radially extending centered by described axis and dash forward
Go out with the second protuberance with described anvil relative,
Wherein, when described hammer rotates, the 3rd protuberance adjoins with the first protuberance of described hammer so that described carrier component
Moved relative to described anvil in a circumferential direction, and by allow described carrier component move and with described joint structure
Part adjoins, and described engagement member is arranged on the center of described relief surface.
17. power tools according to claim 16,
Wherein, form described first cut portion by excising described carrier component on the direction along described axis, and
The quantity of described first cut portion is two, and it is placed on the diagonal on the circumferencial direction centered by described axis,
Described first cut portion on the circumferencial direction centered by the axis by described carrier component is separated from each other 90 degree
Position, the second cut portion for described second protuberance that accommodates described anvil is formed into described carrier component,
The different position that described first cut portion and described second cut portion are positioned along on the direction of described axis, and
The limit of described 3rd protuberance described second cut portion from the circumferencial direction centered by described axis diametrically
Edge portion highlights.
18. power tools according to claim 17,
Wherein, the first shock surface and the second shock surface are formed on described first protuberance, and this first shock surface is used for
Impacting described anvil, this second shock surface is made into contacting with described 3rd protuberance, and
Centered by described axis radially, the placement position of described 3rd protuberance at least some of with described second
Overlapping each other at least partially of the placement position of shock surface.
19. power tools according to claim 18,
Wherein, when described hammer rotates, first described second shock surface adjoins described 3rd protuberance and dashes forward to extrude the 3rd
Go out portion so that described carrier component rotates, and described first shock surface adjoins described second protuberance subsequently.
20. 1 kinds of power tools, including:
Drive member, drives the driving force in source to be passed to this drive member,
Output shaft, it rotates by drive member,
First engagement member and the second engagement member, it can move, wherein at lock between latched position and locking off-position
Determine position to carry out being coupled so that output shaft is non-rotatable with output shaft, at locking off-position, output shaft can be revolved
Turn, and
Outer housing, its receiving drive member and the first engagement member and the second engagement member,
It is characterized in that, described drive member includes: hammer, it is rotated by described driving source；And anvil, it is by hammering into shape accomplished continuously or intermittently
Ground drives, and this anvil is integrally formed with described output shaft,
Be provided with cylinder carrier component, its be attached to can on the axis identical with described anvil for described anvil in advance
Relatively rotating in fixed angle, when hammer engages with anvil, carrier component can rotate between hammer and anvil,
The outer of output shaft can be formed on the locking ring that the first engagement member and the second engagement member contact to place, with defeated
Moved on the circumferencial direction of shaft, and
When rotating in the case of covering on outward output shaft and being fixed, locking ring and the first engagement member and the second engagement member connect
Touch so that the first engagement member and the second engagement member are moved to latched position.
21. power tools according to claim 20,
Wherein, locking ring is disposed on the external peripheral surface of carrier component, and
When described output shaft rotates, described first engagement member and described second engagement member turn together with carrier component
Dynamic, and when anvil and described locking ring relatively rotate predetermined angular when described output shaft stops, anvil and described locking ring
Relative motion limited.
22. power tools according to claim 21, it farther includes:
First engaging piece, it is formed on described locking ring；And
Second engaging piece, it is formed on described outer housing and engages with the first engaging piece, to avoid described locking ring and described
Outer housing relative to each other rotates,
Wherein, described outer housing is formed multiple structure structures that combination is separated from each other along the plane of axis including described output shaft
Part, wherein the second engaging piece be formed at multiple structural elements each on so that described locking ring is by by multiple structure structures
Part combination with one another and supported.
23. power tools according to claim 22,
Wherein, the plurality of structural elements is along including that the plane of described axis is divided into two structural elements of two pieces, and
It is to be set in the way of described locking ring,
The plurality of structural elements is fixed by the multiple screws of use,
Described first engaging piece is formed on the circumferencial direction of described locking ring and is separated from each other in two parts of 180 degree, and
And
Described second engaging piece is respectively formed on said two structural elements.
24. power tools according to claim 23,
Wherein, two screws in the plurality of screw are arranged on the described locking ring radially centered by described axis
Outside, and the position overlapped each other on the direction along described axis.
25. power tools according to claim 20, it farther includes:
Axis hole, it is formed in described outer housing, and is externally exposed on the top of described output shaft, and
Bearing, it is arranged between axis hole and described locking ring on the axis direction along described output shaft, and pivotally
Support rotatable output shaft.
26. power tools according to claim 22,
Wherein, between described first engaging piece and described second engaging piece, on the circumferencial direction centered by described axis
Defining gap so that when described first junction surface contacts with described locking ring, described locking ring is moved to and described
Two engagement member contacts.
27. power tools according to claim 22,
Wherein, described locking ring includes: the cylindrical portion formed centered by described axis；
The flange of annular inward, it is formed on one end on the direction along the axis of cylindrical portion, the flange that annular is outside, its
Being formed on an opposite end on the direction along the axis of cylindrical portion, described first engaging piece is diametrically from cylindrical portion
The protuberance that circumferential surface is prominent, described second engaging piece is the recess formed on the inner circumferential surface of described outer housing, and
Wherein, described locking ring is integrally formed by metal.
28. power tools according to claim 27,
Wherein, prepare the screw for fixing the plurality of structural elements, and
When from be perpendicular to described output shaft section observe time, described protuberance on the direction parallel with the tightening direction of screw,
And project upwards in the side vertical with the divisional plane of described outer housing.
29. power tools according to claim 21,
Wherein, described anvil has the relief surface being formed thereon,
Described carrier component is by being formed two split combinations with one another, and each of which split has semi-cylindrical shape
Shape, this semi-cylindrical shape has the internal diameter more slightly greater than the external diameter of the cylindrical portion of described anvil,
Cut portion is respectively formed in two splits, and described first engagement member and described second engagement member one connect
One ground is separately positioned in the space formed by cut portion, relief surface and described locking ring.
30. power tools according to claim 29,
Wherein, when described hammer is stopped, described anvil rotates relative to described outer housing, so that in described relief surface
Heart position separates with described first engagement member and described second engagement member, and described first engagement member and described second engages
Component is sandwiched between the external peripheral surface of described anvil and the inner circumferential surface of described locking ring so that described anvil is relative to locking
The rotation of ring is limited.
31. power tools according to claim 20,
Wherein, described drive member includes: reducing gear, drives the power in source to be passed to this reducing gear and it is provided with defeated
Shaft；And
Carrier component, it is attached to output shaft,
Can relative to the socket that described output shaft rotates be formed at described output shaft with at the axle identical with the axis of this output shaft
On the connecting portion between carrier component on line, plurality of protuberance is formed on the external peripheral surface of socket, and described first
Engagement member and the second engagement member are arranged on the vicinity of the protuberance of socket, and when described output shaft rotates, described first engages
Component and described second engagement member rotate together with socket, and work as the stopping at described output shaft of socket and described locking ring
When period rotates against, the relative movement between socket and described locking ring is limited.
32. power tools according to claim 31,
Wherein, the cylindrical housings being used for accommodating described reducing gear, described carrier component and described socket is formed on institute
State the inside of outer housing,
First engaging piece is formed on the external peripheral surface of described locking ring, and
To be formed on the inner circumferential surface of described housing with the second engaging piece that described first engaging piece engages.
33. power tools according to claim 32,
Wherein, the circumferencial direction between described first engaging piece and described second engaging piece forms gap.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-104275 | 2012-04-30 | ||
| JP2012104275A JP5888505B2 (en) | 2012-04-30 | 2012-04-30 | Tightening tool |
| JP2013-034741 | 2013-02-25 | ||
| JP2013034741A JP2014161947A (en) | 2013-02-25 | 2013-02-25 | Power tool |
| JP2013051894A JP2014176920A (en) | 2013-03-14 | 2013-03-14 | Power tool |
| JP2013-051894 | 2013-03-14 | ||
| PCT/JP2013/002754 WO2013164905A1 (en) | 2012-04-30 | 2013-04-23 | Power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104271318A CN104271318A (en) | 2015-01-07 |
| CN104271318B true CN104271318B (en) | 2016-11-30 |
Family
ID=
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| CN201220392Y (en) * | 2008-07-07 | 2009-04-15 | 南京德朔实业有限公司 | Shaft lock apparatus of impact screwdriver |
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| US5666715A (en) * | 1995-07-05 | 1997-09-16 | Harris Corporation | Electrically operated impact tool gun |
| CN201220392Y (en) * | 2008-07-07 | 2009-04-15 | 南京德朔实业有限公司 | Shaft lock apparatus of impact screwdriver |
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Address after: Tokyo, Japan, Japan Patentee after: Machine holding company Address before: Tokyo, Japan, Japan Patentee before: Hitachi Koki Company Limited |