CN101657299A - Gas internal combustion type nailing machine - Google Patents
Gas internal combustion type nailing machine Download PDFInfo
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- CN101657299A CN101657299A CN200880011478A CN200880011478A CN101657299A CN 101657299 A CN101657299 A CN 101657299A CN 200880011478 A CN200880011478 A CN 200880011478A CN 200880011478 A CN200880011478 A CN 200880011478A CN 101657299 A CN101657299 A CN 101657299A
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Abstract
In a gas internal combustion-type nailing machine, a cylindrical sleeve (33) is fixed between a movable housing (31) and a fan (7). An annular space part (S) is formed between the movable housing (31)and the sleeve (33). Communication holes (33a, 33b) communicating with the annular space part (S) are formed in the sleeve (33) at the parts upper and lower than the fan (7), respectively. A mixed gas discharged by the fan (7) flows through the lower communication hole (33b), the annular space part (S) and the upper communication hole (33a) and returns to a combustion chamber (3).
Description
Technical field
The present invention relates to squeeze into the gas internal combustion-type nailing machine of nails such as common nails or drivescrew, particularly the improvement of its combustion chamber structure.
Background technology
All the time, the combustion chamber possesses movable housing section, the movable housing section and the action of contact component link and open and close the combustion chamber, in this combustion chamber, supplying with imflammable gas under the closed condition of combustion chamber, rotation mixing imflammable gas and air by fan, utilize spark plug that mist is lighted a fire, make its explosive combustion, make the gas pressure of high pressure carry out nailing in impacting piston, under the open state of combustion chamber, carry out the suction of air, carry out exhaust from impacting the cylinder bottom, the nailing machine of this gas internal combustion-type is by well-known (for example with reference to patent documentation 1).
For imflammable gas and air are promptly mixed, need by fan high-speed stirred mist, still, when the flow velocity of mist is big, even, can not light a fire to mist well sometimes by plug ignition.Therefore, be well known that around spark plug and form special containment wall (for example with reference to patent documentation 2).
Patent documentation 1: the special fair 04-048589 of Japan
Patent documentation 2: TOHKEMY 2006-224268
But, in above-mentioned known gas internal combustion-type nailing machine, during the stirring of the fan in the combustion chamber drives, near the central portion of fan bottom, form the more weak stagnation part of air-flow, the burning velocity of this part latens, thus, the stirring of worry mist causes that imperfect combustion causes efficiency of combustion to descend.In addition, guiding piece and seal in the action of the movable housing of combustion chamber form different parts at the upper and lower of this housing section, therefore, be easy to generate the dislocation in axle center, worry that thus meeting produces the increase of action load and the poor sealing of the movable housing of combustion chamber.
In addition, the upper-lower seal diameter of the movable housing of combustion chamber there are differences, therefore, worry to produce following situation: by based on the pressure in the combustion chamber of combustion pressure or boost pressure, at the action load of combustion chamber generation based on inclined to one side load, the effects of load that combustion pressure causes can exert an influence to mechanical strength, the state that the effects of load that boost pressure causes can make the combustion chamber become after supercharging to be moved upward and the combustion chamber can not be opened.
Summary of the invention
More than one embodiment of the present invention provides a kind of gas internal combustion-type nailing machine, it is arranged on the sleeve of the tubular that impacts the roughly linearity that extends between cylinder upper end and the top, combustion chamber by the inboard at the movable housing of combustion chamber, stir the airflow of mixed gas that produces by fan effectively, can light a fire reliably to the mist after stirring simultaneously.
In addition, more than one embodiment of the present invention provides a kind of gas internal combustion-type nailing machine, and by above-mentioned sleeve is set, movable housing and head valve can mutually noninterfere ground self contained functions.
According to more than one embodiment of the present invention, gas internal combustion-type nailing machine possesses: accommodate the cylinder that impacts that impacts piston slidably, the movable housing of tubular, be configured in the described combustion chamber that impacts the top of cylinder and be arranged to pass through described movable housing switching, the fan that centre in described combustion chamber disposes, the sleeve of fixing tubular between described movable housing and described fan, and top that the described fan of comparing of described sleeve leans on and by under the bottom be provided with respectively and make described combustion chamber and interconnecting part that the annulus portion that forms is communicated with between described movable housing and sleeve.
According to described gas internal combustion-type nailing machine, the fixing sleeve of tubular between movable housing and fan, between movable housing and sleeve, form annulus portion, and, top that the described fan of comparing of described sleeve leans on and by under the bottom form the interconnecting part that is communicated with annulus portion respectively, make the mist that blows out by described fan get back to the combustion chamber from annulus portion through the top intercommunicating pore by described bottom interconnecting part.Therefore, can forcibly change the air-flow that fan produces by sleeve with interconnecting part, therefore, the more weak stagnation portion diffusion of the air-flow that is easy to generate in the fan central lower is mixed, can prevent the reduction of the efficiency of combustion that causes because of imperfect combustion.
In addition, described gas internal combustion-type nailing machine also can possess: separating part, be provided with in described combustion chamber and described impacting between the cylinder, and have that pressure in combustion chamber side is closed when high and the valve when the pressure that impacts cylinder side is high, opened; The below extension, below the described sleeve and compare described separating part below form; Peristome, below form on the extension, be positioned at and the described corresponding position of supply port that forms on the upper end sidewall of cylinder that impacts; And the head valve of ring-type, described impact cylinder and sleeve below movably be provided with up and down between the extension, described supply port and described peristome are opened and closed.Described head valve also can carry out opening action by the combustion of mixed gas pressure in the described combustion chamber by the application of force on closing direction.
Below described sleeve, compare described separating part below form below extension, below this on extension, forming peristome with described impacting on the corresponding position of the supply port that forms on the upper end sidewall of cylinder, described impact cylinder and sleeve below between the extension, the head valve of the ring-type that opens and closes described supply port and peristome movably is set up and down, all the time on closing direction to this head valve application of force, carry out opening action by the combustion of mixed gas pressure in the described combustion chamber, in this case, owing between movable housing and head valve, dispose sleeve, therefore, movable housing and head valve can mutually noninterferes and action independently, so the action of nailing machine is stable.
In addition, the sleeve of the tubular of described combustion chamber also can with the rotating vane of described fan near and be provided with.
The rotating vane of the sleeve of the tubular of combustion chamber and described fan near and under the situation about being provided with, the air-flow of emitting to the footpath of blade periphery direction that the rotation of fan blade produces forms towards the axial enforceable fast air-flow that flows, the more weak stagnation portion diffusion of air-flow that is easy to generate in the fan central lower is mixed, can promote to mix equably gas thus, prevent unburnt generation, improve efficiency of combustion.
In addition, described sleeve also can guide the action of described movable housing.
Under the situation of the action that is fixed on the sleeve steering movable housing on the nailing machine main body, the axle dislocation does not take place and stably is supported in movable housing, reliably and smoothly moves up and down, and the action load alleviates, and has prevented poor sealing.
In addition, the sealed diameter up and down of described movable housing also can be for roughly the same.
Sealed diameter up and down at movable housing is made as under the roughly the same situation, and the combustion pressure when burning by the mist in the combustion chamber can not produce based on the poor load in footpath that seals with respect to movable housing.Therefore, prevent to produce following situation: because of the influence of the boost pressure in the combustion chamber etc. produces load partially to movable housing, movable housing becomes the state of rise thus, or this housing section can not be opened.
In addition, also can cover in the described interconnecting part position of approaching described spark plug.
In addition, under the situation of the position of approaching described spark plug configuration shielding portion, the speed of described air-flow promotes, and still, owing to be formed with shielding portion near spark plug, reduces at the flow velocity of this part air-flow in described interconnecting part.Therefore, light a fire reliably, thereby ignitability improves by spark plug.And shielding portion forms on sleeve and gets final product, and needn't form with the sleeve split.
Other feature and effect can be known according to elaboration and the additional claim of embodiment.
Description of drawings
Fig. 1 is the profilograph of major part of the gas internal combustion-type nailing machine of first exemplary embodiments.
Fig. 2 is the drawing in side sectional elevation of the combustion chamber part of first exemplary embodiments.
Fig. 3 is the amplification profile of the combustion chamber closed condition of first exemplary embodiments.
Fig. 4 is the profilograph of major part of the gas internal combustion-type nailing machine of second exemplary embodiments.
Fig. 5 is the profilograph of major part of the gas internal combustion-type nailing machine of the 3rd exemplary embodiments.
Fig. 6 is the amplification profile of the combustion chamber closed condition of the 3rd exemplary embodiments.
Fig. 7 is the drawing in side sectional elevation of major part of the combustion chamber part of the 3rd exemplary embodiments.
Label declaration
A gas internal combustion-type nailing machine 1 impacts cylinder 2 and impacts piston 3 combustion chambers
31 movable housings, 32 cylinder caps, 33 sleeve 33a, 33b intercommunicating pore (interconnecting part)
7 fans, 36 shielding portions
The specific embodiment
Below, typical embodiment of the present invention is described with reference to the accompanying drawings.
First exemplary embodiments
With reference to Fig. 1～Fig. 3 first exemplary embodiments of the present invention is described.
Fig. 1 and Fig. 2 represent gas internal combustion-type nailing machine A, this nailing machine A possess the nailing machine main body A 1 of accommodating driving mechanism portion and gaseous fuel tube etc., with the integrally formed handle A2 of nailing machine main body A 1, outstanding and possess the chain-drive section A3 etc. of the installation portion of nail casket A4 from the diagram bottom of nailing machine main body A 1.
The driving mechanism portion of accommodating in the nailing machine main body A 1 is by the cylinder 1 that impacts cylindraceous, in impacting cylinder 1, impact piston 2 along what the diagram above-below direction reciprocatingly slided, surround and be combustion chamber 3 by the cylinder cap 32 on the movable housing 31 of the tubular that is positioned at the top that impacts cylinder 1 and top by the above-mentioned space that separates above that impacts piston 2, impacting on the piston 2 the fixing device 4 that hammers into, be installed in the spark plug 5 on the cylinder cap 32 on top of combustion chamber 3, and the imflammable gas fuel that will supply with from gaseous fuel tube 6 and air mixes and the fan 7 of the stirring usefulness that driven by motor M etc. constitutes.
In addition, be provided with the contact component 8 of the initial motion that is used for essence startup driving mechanism portion.Contact component 8 under the state that does not supply nailing by spring energized, so that its lower end 8a is outstanding from the foot of chain-drive section A3, be connected with the bottom of the movable housing 31 of combustion chamber 3 with the rod unit upper end 8b of contact component 8 combinations, thus, the movable housing 31 of combustion chamber 3 moves down, and top seal described later is open with O type circle 31a.
As shown in Figure 3,, the movable housing 31 of combustion chamber 3 is moved up, close top O type circle 31a, simultaneously,, carry out the supply of gaseous fuel and the igniting of spark plug 5 etc. with the operations linkage of trigger rod 9 by being pressed into contact component 8 upward.
Therefore, being pressed in the not shown contact component 8 that is driven on the material is pressed into relatively upward, thus, the movable housing 31 of the tubular of combustion chamber 3 moves up, make the combustion chamber 3 of open state become the hermetically closing state, and, supply with injection supply gas fuel in the road direction combustion chamber 3 from gaseous fuel tube 6 through the fuel of the cylinder cap 32 on the top of combustion chamber 3, utilize the driving of agitation fan 7 and mix air fuel so that it is even, push operation by trigger rod 9, make the trigger switch connection and, make the mist explosive combustion in the combustion chamber 3 spark plug 5 igniting.
The combustion pressure of the high pressure that the combustion of mixed gas in the combustion chamber 3 produces acts on the top that impacts piston 2, make and impact piston 2 and move down, hammer into moving down of device 4 by being fixed on to impact on the piston 2, impact the head of sending into the nail in the chain-drive section A3 from nail casket A4, this nail is squeezed into the assigned position that is driven into material.
In addition, when impacting piston 2 and being moved down into bottom dead centre, the temperature of the burning gases that sharply expand in impacting cylinder 1 sharply descends and becomes negative pressure, therefore, impacts piston 2 and returns and move to top dead-centre.
And, be accompanied by with above-mentioned action before and after the end of the nailing that causes of the release of operation of the trigger rod 9 that carries out, be pushed down and move down from being driven into the restoring force of the open contact component 8 of material pushing by spring, the movable housing 31 that makes combustion chamber 3 that moves down of contact component 8 moves down, the top O type circle 31a of the upper cylinder cap 32 of this housing section 31 and combustion chamber 3 is opened, in combustion chamber 3, flow into ozone from open this O type circle 31a.
Above-mentioned gas internal combustion-type nailing machine A roughly possesses above-mentioned structure.
At this,, describe in detail below with reference to Fig. 1 and Fig. 2 about the structure of above-mentioned combustion chamber 3.Sleeve 33 be provided with the tubular that separates combustion chamber 3 by the inboard of the above-mentioned movable housing 31 of the combustion chamber 3 of the movable housing 31 of tubular and 32 encirclements of cylinder head portion is formed with the S of annulus portion between sleeve and movable housing.
In addition, O type circle 31a, the 31b of the upper and lower on the sleeve 33 that is made of cylindrical body forms with the footpath each other, and thus, the sealed diameter of the upper and lower of movable housing 31 is identical.
Combustion chamber structure according to above-mentioned formation, formation impacts the sleeve 33 of the essence extension of cylinder 1, the slip of the movable housing 31 of periphery wall 34, the 35 guiding combustion chambers 3 of the upper and lower by its perisporium, therefore, the axle center of O type circle 31a, 31b can not misplace up and down, movable housing 31 is along sliding and moving up and down reliably, and the action load of movable housing 31 is alleviated, and has prevented the poor sealing of O type circle 31a, 31b effectively.
In addition, because sleeve 33 is made of the cylindrical body of straight line, so the diameter of the type of O up and down circle 31a, the 31b of the movable housing 31 of combustion chamber 3 is identical, therefore, the load that the combustion pressure in the time of can not burning because of the mist in the combustion chamber produces based on the diameter difference of sealing with respect to movable housing 31.Therefore, in being provided with, give under the situation etc. of mechanism of boost pressure the combustion chamber, prevent to produce following situation: produce load partially on movable housing 31 under the influence of boost pressure etc., movable housing 31 becomes the state of rise, or this movable housing 31 can not be opened.
And, the rotating vane of the perisporium of sleeve 33 and the fan 7 that stirs usefulness near and be provided with, therefore, the air-flow that flows to diametric(al) foreign side by said fans 7 is blocked by the perisporium of sleeve 33, formation is to the axial enforceable air-flow in the below of combustion chamber 3 (with reference to the arrow among Fig. 1), therefore, this air-flow is involved in soft air near the pivot of the bottom of rotating vane energetically, intercommunicating pore 33b from the bottom of sleeve 33 flows out simultaneously, flow into the space between this sleeve 33 and the movable housing 31, air-flow behind the space between inflow sleeve 33 and the movable housing 31 rises in this space, the air-flow that formation flows into to the behind of the rotating vane of agitation fan 7.By flowing of this air-flow, promote air fuel further to spread mixing, can promote its homogenising effectively.Thus, can prevent unburnt generation, improve efficiency of combustion.
Second exemplary embodiments
Fig. 4 represents that the gas internal combustion-type nailing machine with the head valve formula is the improvement structure (second exemplary embodiments) of the combustion chamber of prerequisite, therefore, this gas internal combustion-type nailing machine A possesses and the essentially identical structure of the gas internal combustion-type nailing machine of first exemplary embodiments, therefore, structure portion for common omits repeat specification in principle.
In this combustion chamber 3, the upper end that impacts cylinder 1 be provided with separate impact in the cylinder 1 and combustion chamber 3 in separating part 11 and to this separating part 11 on the check-valves 90 that opens and closes of the through hole 11a of formation.
Check-valves 90 is made of leaf spring, applies elastic force with between closing in the combustion chamber 3 often and impacting in the cylinder 1, opens when only the interior pressure in the inner pressure ratio combustion chamber 3 in impacting cylinder 1 is high.
In the sleeve 33, the inboard fixed part 33c of its below is with chimeric fixing in the periphery that impacts separating part 11a fixing on cylinder 1 upper end, its upper end is chimeric fixing with the 32a of circular step portion of cylinder cap 32, thus, the S of annulus portion of the inboard of the movable housing 31 of the tubular of combustion chamber 3 structure of comparing Fig. 1 prolongs formation downwards.
Then, impacting formation supply port 1a on the upper end sidewall of cylinder 1, the corresponding with it peristome 33e that on extension 33d below the sleeve 33, offers.And, impacting the head valve 91 that movably is provided with ring-type between cylinder 1 and the sleeve 33 up and down, be used for being communicated with or blocking-up supply port 1a and peristome 33e.
The inner peripheral surface of the extension 33d that head valve 91 extends to below more along the upper outer face that impacts cylinder 1 with from the inboard fixed part 33c of the below of sleeve 33 and configuration movably up and down.In addition, the spring 92 that head valve 91 is provided with by its underpart is the application of force upward, to close supply port 1a often.The elastic force of spring 92 is set at the degree that head valve 91 can not be remained closed condition when interior pressure in combustion chamber 3 increases by burning.
In addition, the diameter of O type circle 31a, the 31b of the sealing of the top and the bottom of movable housing 31 is roughly the same.
In addition, the moving up and down of the above-mentioned movable housing 31 of above-mentioned sleeve 33 guiding, but with the rotating vane of said fans 7 near and the embodiment of the structure that is provided with and Fig. 1 is identical.
Then, the manner of execution to above-mentioned nailing machine describes.At the knock-in tack period of the day from 11 p.m. to 1 a.m, by being pressed into of contact component 8, movable housing 31 moves up, close combustion chamber 3 as shown in Figure 4, gas jet fuel in combustion chamber 3, mix with air and light a fire, by the combustion explosion in the combustion chamber 3, the interior pressure in the combustion chamber 3 sharply raises, and this pressure acts on the upper end of head valve 91 through peristome 33e from spatial portion S, therefore, the elastic force of head valve 91 antagonistic springs 92 and descending is opened peristome 33e, therefore to supply port 1a, combustion gas is pressed to impact in the cylinder 1 and is supplied with, and drives and impacts piston 2.
After squeezing into the nail end, the burning gases that impact in the cylinder 1 cool off rapidly, impact the top decompression of piston 2, therefore, head valve 91 moves up by spring 92, supply port 1a crested, simultaneously, the pressure reduction up and down by separating part 11 is opened check-valves 90, impacts piston 2 and moves up and reset.The pressure that impacts in the cylinder 1 is opened to combustion chamber 3 in from through hole 11a, therefore, impact piston 2 reliably reset movement arrive top dead-centre.Then, contact component 8 moves down, and movable housing 31 moves down, and makes combustion chamber 3 open, and ozone enters from open top O type circle 31a, from the exhaust outlet 1b discharge burning gases of bottom.
And, even the piston 2 that impacts that has taken place for example to squeeze into after the end does not fully return for some reason but impacts piston 2 and only turns back to midway situation, impact in the cylinder 1 and the check-valves 90 of the separating part 11 in the combustion chamber 3 by separating, the volume of combustion chamber 3 also can not enlarge but keep certain, prevent the rarefaction of fuel thus, guaranteed the burning under the suitable fuel concentration.
Promptly, with the location independent that impacts piston 2, the volume of combustion chamber 3 is certain all the time, mist in the combustion chamber 3 can be remained on certain debita spissitudo, even when for example impacting piston 2 and not returning fully, also can impact piston 2 and apply certain pressure, make it to move to bottom dead centre, can when cooling, make once more and impact piston 2 reset movement to top dead-centre to this.
In addition, using supercharger (not shown) under the situation of combustion chamber 3 pressurized airs, the increased pressure in the combustion chamber 3, still, head valve 91 can not be opened under this degree, therefore, impacts piston 2 and can not descend because of boost pressure.
Above-mentioned nailing machine also can be obtained the identical action effect of described action effect with the nailing machine of Fig. 1.
And, sleeve 33 is present between the movable housing 31 and head valve 91 of combustion chamber 3, by sleeve 33 as fixed part, movable housing 31 does not directly contact with head valve 91 but is cut off, therefore, can realize that also movable housing 31 and head valve 91 are independent of each other and are disengaged the distinctive action effect of interlock in it moves.
In addition, among the embodiment movable housing that moves up and down is illustrated, but also can be the formation that the combustion chamber is opened and closed by rotation.
The 3rd exemplary embodiments
With reference to Fig. 5～Fig. 8 the 3rd exemplary embodiments of the present invention is described.
Fig. 5 and Fig. 6 represent gas internal combustion-type nailing machine A, and this nailing machine A possesses the integrally formed handle A2 of the nailing machine main body A 1 of accommodating driving mechanism portion and gaseous fuel tube etc. and nailing machine main body A 1 and possesses from the chain-drive section A3 of the installation portion of the outstanding nail casket A4 in the diagram bottom of nailing machine main body A 1 etc.
The driving mechanism portion of accommodating in the nailing machine main body A 1 is by the cylinder 1 that impacts cylindraceous, in impacting cylinder 1, impact piston 2 along what the diagram above-below direction reciprocatingly slided, the cylinder cap 32 that is positioned at the movable housing 31 of tubular on the top that impacts cylinder 1 and top surrounds and is combustion chamber 3 by the space that the above-mentioned upper surface that impacts piston 2 separates, be fixed in to impact and hammer into device 4 on the piston 2, be installed in the spark plug 5 on the cylinder cap 32 on top of combustion chamber 3, and the imflammable gas fuel that will supply with from gaseous fuel tube 6 and air mixes and the fan 7 of the stirring usefulness that driven by motor M etc. constitutes.
In addition, be provided with the contact component 8 of the initial motion that is used for essence startup driving mechanism portion.Contact component 8 under the state that does not supply nailing by spring energized, so that its lower end 8a is outstanding from the foot of chain-drive section A3, be connected with the bottom of the movable housing 31 of combustion chamber 3 with the rod unit upper end 8b of contact component 8 combinations, thus, the movable housing 31 of combustion chamber 3 moves down, and top seal described later is open with O type circle 31a.
The combustion pressure of the high pressure that the combustion of mixed gas in the combustion chamber 3 produces acts on the top that impacts piston 2, make and impact piston 2 and move down, by impacting on the piston 2 fixing the moving down of device 4 that hammer into, impact the head of sending into the nail in the through hole of chain-drive section A3 from nail casket A4, this nail is squeezed into the assigned position that is driven into material.
In addition, when impacting piston 2 and being moved down into bottom dead centre, the temperature of the burning gases that sharply expand in impacting cylinder 1 sharply descends and becomes negative pressure, therefore, impacts piston 2 and returns and move to top dead-centre.
And, be accompanied by with above-mentioned action before and after the end of the nailing that causes of the release of operation of the trigger rod 9 that carries out, be pushed down and move down from being driven into the restoring force of the open contact component 8 of material pushing by spring, during the moving down of contact component 8, the movable housing 31 of combustion chamber 3 also moves down, as shown in Figure 5, the top O type circle 31a of the upper cylinder cap 32 of housing section 31 and combustion chamber 3 is opened, ozone flows in combustion chamber 3.
Above-mentioned gas internal combustion-type nailing machine A roughly possesses above-mentioned structure.
At this,, describe in detail below with reference to Fig. 5 and Fig. 6 about the structure of above-mentioned combustion chamber 3.At the sleeve 33 that is provided with the tubular that separates combustion chamber 3 by the inboard of the above-mentioned movable housing 31 of the combustion chamber 3 of the movable housing 31 of tubular and 32 encirclements of cylinder head portion, thus, inboard at sleeve forms inner space 3a, and forms the 3b of outer space portion of ring-type between sleeve 33 and movable housing 31.
Then, as shown in Figure 7, be arranged in top interconnecting part 33a part 36 cresteds at the position of approaching above-mentioned spark plug of sleeve 33.Shielding portion 36 also can be the formation that does not form peristome at this position, in addition, also can use these interconnecting parts of covering such as suitable seal material.
In addition, the type of O up and down circle 31a, the 31b on the sleeve 33 that is made of cylindrical body roughly forms with the footpath each other, and thus, the sealed diameter up and down of movable housing 31 is roughly the same.
But, in above-mentioned combustion chamber 3, the upper end that impacts cylinder 1 be provided with separate impact in the cylinder 1 and combustion chamber 3 in separating part 11 and the check-valves 90 that the through hole 11a of formation on this separating part 11 is opened and closed.
Check-valves 90 is made of leaf spring,, is opened when only the interior pressure in the inner pressure ratio combustion chamber 3 in impacting cylinder 1 is high with between closing in the combustion chamber 3 often and impacting in the cylinder 1 by spring energized.
In the sleeve 33, its upper end is chimeric fixing with the 32a of circular step portion of cylinder cap 32, the inboard fixed part 33c of its below is with chimeric fixing in the periphery that impacts the fixing separating part 11a in cylinder 1 upper end, thus, the 3a of annulus portion of the inboard of the movable housing 31 of the tubular of combustion chamber 3 prolongs formation downwards.
Then, impacting formation supply port 1a on the upper end sidewall of cylinder 1, the corresponding with it peristome 33e that on extension 33d below the sleeve 33, offers.And, impacting between cylinder 1 and the sleeve 33 head valve 38 that movably is provided with ring-type in the mode of opening or cover supply port 1a and peristome 33e up and down.
The inner peripheral surface configuration movably up and down of the extension 33d that head valve 38 further extends downwards along the upper outer face that impacts cylinder 1 with from the inboard fixed part 33c of the below of sleeve 33.In addition, the spring 92 that head valve 38 is provided with by its underpart, in the mode of closing supply port 1a often by the application of force upward.The elastic force of spring 92 is set at the degree that head valve 38 can not be remained closed condition when interior pressure in combustion chamber 3 increases by burning.
Then, the manner of execution to above-mentioned nailing machine describes.At the knock-in tack period of the day from 11 p.m. to 1 a.m, by being pressed into of contact component 8, movable housing 31 moves up, and as shown in Figure 6, closes combustion chamber 3, and gas jet fuel and air mix in combustion chamber 3.
At this moment, the perisporium of sleeve 33 is provided with the rotating vane of the fan 7 that stirs usefulness is approaching, therefore, the air-flow that flows to the diametric outside by said fans 7 is covered by the perisporium of sleeve 33, formation is to axial enforceable flow (with reference to the arrow among Fig. 6) in the below of combustion chamber 3, therefore, this air-flow is involved in soft air energetically near the pivot of the bottom of fan 7, form following flow simultaneously: from the interconnecting part 33b of the bottom of sleeve 33 laterally, the 3b of outer space portion between sleeve 33 and the movable housing 31 flows out, and then in this space, rise, enter the 3a of inner space portion from the interconnecting part 33a on top, flow into to the behind of the rotating vane of fan 7 again.By flowing of this air-flow, promote air fuel further to mix, promote its homogenising at short notice effectively.
And, mist is by spark plug 5 ignition, by its combustion pressure, the interior pressure in the combustion chamber 3 sharply increases, and this pressure acts on the upper end of head valve 38 through peristome 33e from spatial portion S1, S2, therefore, the elastic force of head valve 38 antagonistic springs 92 and descending is opened peristome 33e, therefore to supply port 1a, burning air pressure is supplied in impacting cylinder 1, impacts piston 2 and is driven.
After squeezing into the nail end, as shown in Figure 5, the burning gases that impact in the cylinder 1 cool off rapidly, impact the top decompression of piston 2, therefore, head valve 38 moves up by spring 92, supply port 1a crested, simultaneously, by the pressure reduction up and down with separating part 11, check-valves 90 is opened, and impacts piston 2 and moves up and reset, therefore, the exhaust outlet 1b from top discharges burning gases.The pressure that impacts in the cylinder 1 discharges to combustion chamber 3 in from the second peristome 11a, therefore, impact piston 2 reliably reset movement arrive top dead-centre.Then, contact component 8 moves down, and simultaneously, movable housing 31 moves down, and open combustion chamber 3, and ozone enters.
And, even the piston 2 that impacts that has taken place for example to squeeze into after the end does not fully return for some reason but impacts piston 2 and only turns back to midway situation, impact in the cylinder 1 and the check-valves 90 of the separating part 11 in the combustion chamber 3 by separating, the volume of combustion chamber 3 also can not enlarge but keep certain, prevent the rarefaction of fuel thus, guaranteed the burning under the suitable fuel concentration.
Promptly, with the location independent that impacts piston 2, the volume of combustion chamber 3 is certain all the time, mist in the combustion chamber 3 can be remained on certain debita spissitudo, even when for example impacting piston 2 and not returning fully, also can impact piston 2 and apply certain pressure, make it to move to bottom dead centre, can when cooling, make once more and impact piston 2 reset movement to top dead-centre to this.
In addition, using supercharger (not shown) under the situation of combustion chamber 3 pressurized airs, the increased pressure in the combustion chamber 3, still, head valve 38 can not be opened under this degree, therefore, impacts piston 2 and can not descend because of boost pressure.
As mentioned above, the essence extension that impacts cylinder 1 is the slip of above-below direction of the movable housing 31 of the sleeve 33 sliding part guiding combustion chamber 3 up and down that utilizes its perisporium, therefore, can not misplace in the axle center on the movable housing 31, it moves up and down slyness and carries out reliably, alleviate the action load of movable housing 31, and prevented the poor sealing of O type circle 31a, 31b effectively.
In addition, because sleeve 33 is made of the cylindrical body of straight line roughly, so the diameter of the type of O up and down circle 31a, the 31b of the movable housing 31 of combustion chamber 3 is roughly the same, therefore, combustion pressure when burning by the mist in the combustion chamber can be with respect to the load of movable housing 31 generations based on the diameter difference of sealing.Therefore, in being provided with, give under the situation etc. of mechanism of boost pressure the combustion chamber, prevent to be created in producing partially load under the influence of boost pressure etc. on the movable housing 31 and movable housing 31 becomes the state of rise, or this movable housing 31 situation about can not open.
And, the air-flow that rotation by fan 7 forcibly blows out downwards forms following flowing: from the bottom interconnecting part 33b of sleeve 33 laterally spatial portion 3b move, and then rise, flow into the 3a of inner space portion once more and flow into from top interconnecting part 33a to the behind of the rotating vane of fan 7, thus, air fuel is fully mixed, and can prevent unburnt generation thus, improves efficiency of combustion.
Then, the position of the most approaching above-mentioned spark plug 5 configuration shielding portion 36 in the interconnecting part 33a of top, therefore, as mentioned above, by the rotation of fan 7, from the bottom interconnecting part 33b of sleeve 33 laterally spatial portion S2 move the back and rise, during from the top interconnecting part 33a inflow inner space S1 of portion, the speed of air-flow promotes, but owing near spark plug 5, be formed with shielding portion 36, therefore, the flow velocity at this part air-flow reduces.Therefore, owing to lighted a fire reliably by spark plug 5, flammability improves.And shielding portion 36 forms on sleeve 33 and gets final product, and there is no need to form with sleeve 33 splits.
In addition, sleeve 33 is present between the movable housing 31 and head valve 38 of combustion chamber 3, by sleeve 33 as fixed part, movable housing 31 does not directly contact with head valve 38 but is cut off, therefore, can realize that also movable housing 31 and head valve 38 are independent of each other and are disengaged the distinctive action effect of interlock in it moves.
In addition, the invention is not restricted to the structure that movable housing, head valve move up and down.Also can be applicable to the structure of carrying out on-off action by rotation.
Understand the present invention in detail with reference to specific embodiment, but can not break away from the spirit and scope of the invention and apply various changes and correction that this it will be apparent to those skilled in the art that.
The application is based on the Japanese patent application (Japanese Patent Application 2007-096165) of application on April 2nd, 2007 and the Japanese patent application (Japanese Patent Application 2007-118818) of application on April 27th, 2007, and the content of above-mentioned patent application is cited as reference at this.
The present invention can be used for squeezing into common nails or squeezes in the nailing machine of gas internal combustion-type of nails such as bolt.
Claims (6)
1. gas internal combustion-type nailing machine possesses:
Impact cylinder, accommodate slidably and impact piston;
The movable housing of tubular;
The combustion chamber is configured in the described top that impacts cylinder, and is arranged to and can opens and closes by described movable housing;
Fan is configured in the centre of described combustion chamber;
The sleeve of tubular is arranged between described movable housing and the described fan, and is fixed on the nailing machine main body; And
Interconnecting part, be separately positioned on the described fan of comparing of described sleeve by last top and by under the bottom, described combustion chamber is communicated with the annulus portion that forms between described movable housing and sleeve.
2. gas internal combustion-type nailing machine as claimed in claim 1 also possesses:
Separating part is arranged on described combustion chamber and described impacting between the cylinder, has that pressure in combustion chamber side is closed when high and the valve opened when the pressure that impacts cylinder side is high;
The below extension of described sleeve below is formed at the below of described separating part;
Peristome is formed on the extension of below, is positioned at and the described corresponding position of supply port that forms on the upper end sidewall of cylinder that impacts; And
The head valve of ring-type can be arranged between the described below extension that impacts cylinder and sleeve up or down, described supply port and described peristome opened and closed,
Described head valve quilt carries out opening action to the closing direction application of force by the combustion of mixed gas pressure in the described combustion chamber.
3. gas internal combustion-type nailing machine as claimed in claim 1, the sleeve of the tubular of described combustion chamber and the rotating vane of described fan near and be provided with.
4. gas internal combustion-type nailing machine as claimed in claim 1, the action of the described movable housing of described sleeve steering.
5. gas internal combustion-type nailing machine as claimed in claim 1, the upper-lower seal diameter of described movable housing is roughly the same.
6. gas internal combustion-type nailing machine as claimed in claim 1, the position crested of approaching described spark plug in the described interconnecting part.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007096165A JP4957897B2 (en) | 2007-04-02 | 2007-04-02 | Gas internal combustion nailer |
| JP096165/2007 | 2007-04-02 | ||
| JP2007118818A JP5012176B2 (en) | 2007-04-27 | 2007-04-27 | Gas internal combustion nailer |
| JP118818/2007 | 2007-04-27 | ||
| PCT/JP2008/056132 WO2008120731A1 (en) | 2007-04-02 | 2008-03-28 | Gas internal combustion-type nailing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101657299A true CN101657299A (en) | 2010-02-24 |
| CN101657299B CN101657299B (en) | 2012-07-18 |
Family
ID=39978194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800114787A Expired - Fee Related CN101657299B (en) | 2007-04-02 | 2008-03-28 | Gas internal combustion type nailing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4957897B2 (en) |
| CN (1) | CN101657299B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345750A (en) * | 2010-07-26 | 2012-02-08 | 美克司株式会社 | Fluid supply control device and gas combustion nailer |
| CN103213097A (en) * | 2013-04-25 | 2013-07-24 | 朱益民 | Gas nail gun |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4483473A (en) * | 1983-05-02 | 1984-11-20 | Signode Corporation | Portable gas-powered fastener driving tool |
| JPH08290370A (en) * | 1995-04-19 | 1996-11-05 | Japan Power Fastening Co Ltd | Gas combustion-type portable driving tool |
| JP4269912B2 (en) * | 2003-03-19 | 2009-05-27 | 日立工機株式会社 | Combustion power tool |
| JP4264034B2 (en) * | 2004-06-15 | 2009-05-13 | 株式会社マキタ | Combustion work tool |
| JP4446287B2 (en) * | 2005-02-18 | 2010-04-07 | 日立工機株式会社 | Combustion nailer |
-
2007
- 2007-04-02 JP JP2007096165A patent/JP4957897B2/en not_active Expired - Fee Related
-
2008
- 2008-03-28 CN CN2008800114787A patent/CN101657299B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345750A (en) * | 2010-07-26 | 2012-02-08 | 美克司株式会社 | Fluid supply control device and gas combustion nailer |
| CN102345750B (en) * | 2010-07-26 | 2014-09-24 | 美克司株式会社 | Fluid supply control device and gas combustion nailer |
| US8985425B2 (en) | 2010-07-26 | 2015-03-24 | Max Co., Ltd. | Fluid supply control device and gas combustion type nailer |
| CN103213097A (en) * | 2013-04-25 | 2013-07-24 | 朱益民 | Gas nail gun |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101657299B (en) | 2012-07-18 |
| JP4957897B2 (en) | 2012-06-20 |
| JP2008254081A (en) | 2008-10-23 |
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