CN107127706A

CN107127706A - Pneumatic screw gun

Info

Publication number: CN107127706A
Application number: CN201710308112.7A
Authority: CN
Inventors: 资义勇; 谢素艺
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-05-04
Filing date: 2017-05-04
Publication date: 2017-09-05
Anticipated expiration: 2037-05-04
Also published as: CN107127706B

Abstract

Pneumatic screw gun, is related to pneumatic tool technical field, and it includes bore, in the housing of pneumatic screw gun；Air motor, in bore and can be squeezed into screw on direction move forward and backward；Screwdriver bit, is connected to air motor and drives rotation by air motor, screwdriver bit can be squeezed on direction in screw with air motor and moved forward and backward；Continuous nail feeding machanism, for intermittent toward conveying screw in front of screwdriver bit；Bore is separated into the first chamber on front side of it and the second chamber positioned at rear side by air motor；By toward injecting gas in first chamber and/or second chamber so that air motor left and right ends produce pressure differential, are moved forward or backward so as to promote air motor and screwdriver bit to be squeezed into screw on direction.The pneumatic screw gun that the present invention is provided is simpler, compact compared to existing screw gun structure, and its production cost is lower, the more stable reliable, service life that works is longer.

Description

Pneumatic screw gun

Technical field

The present invention relates to pneumatic tool technical field, more particularly to a kind of pneumatic screw gun.

Background technology

Screw instrument of beating the most frequently used at present is pneumatic screwdriver, needs a hand to operate pneumatic screwdriver, another when playing screw with pneumatic screwdriver Hand grasps screw, it is impossible to one-handed performance.

For ease of one-handed performance, people have invented the bolting machine of automatic nail feeding.No. 3793272 publication public affairs of Japanese Patent No. A kind of bolting machine is opened, it will make the piston that screwdriver bit is axially moveable be divided into main piston and auxiliary piston two parts, led to Crossing the movement of piston makes air motor be advanced along direction is squeezed into.The following technology of Japanese Unexamined Patent Publication 11-300639 publications, will Bolting machine is designed to that direction traveling is not squeezed on edge to air motor, and only promotes screwdriver bit to be moved along direction is squeezed into by piston It is dynamic.In addition, Chinese patent literature CN102431003A and CN101259606A also each disclose a kind of bolting machine, its is same It is come so that screwdriver bit is advanced along direction is squeezed into by the piston of stretching motion.

Although the bolting machine that above-mentioned patent is related to can realize it is pneumatic play screw, it is required for configuration to make screwdriver bit （Or also include air motor）The piston that direction is moved is squeezed on edge（There are two groups of actuating units, one equivalent to above-mentioned patent Group actuating unit is drives the air motor of screwdriver bit rotation, and another group of dynamic structure is makes screwdriver bit can be along squeezing into direction Mobile piston）, overall structure is more complicated.

The content of the invention

The technical problem to be solved in the present invention is to provide a kind of pneumatic screw gun of brand new, the knot of the pneumatic screw gun Structure is simpler compared to existing bolting machine.

In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：A kind of pneumatic screw gun, including

Bore, in the housing of the pneumatic screw gun；

Air motor, in the bore and can be squeezed into screw on direction move forward and backward；

Screwdriver bit, is connected to the air motor and drives rotation by air motor, the screwdriver bit can be with air motor Squeeze on direction and move forward and backward in screw together；

Continuous nail feeding machanism, for intermittent toward conveying screw in front of the screwdriver bit；

Bore is separated into the first chamber on front side of it and the second chamber positioned at rear side by the air motor；

By toward injecting gas in the first chamber and/or second chamber so that the air motor left and right ends produce pressure Power is poor, is moved forward or backward so as to promote the air motor and screwdriver bit to be squeezed into screw on direction.

It is preferred that, the screwdriver bit is removably connected to air motor.

In one embodiment of the invention, the pneumatic screw gun also includes that the position of air motor can be locked Lockable mechanism；

The air motor is passed through compressed air provided with air inlet and reversion air inlet is rotated forward, toward the rotating forward air inlet and may be such that The air motor driving screwdriver bit is rotated forward, and compressed air is switched to after the reversion air inlet is passed through, institute is may be such that State air motor driving screwdriver bit reversion.

Further, the lower section of the bore, which is provided with to be provided with hollow handle, the inner chamber of the hollow handle, passes through valve control No. 1 inlet channel, No. 2 inlet channels and No. 3 inlet channels of break-make processed, gas outlet and the first chamber of No. 1 inlet channel Room is connected；

Provided with the slide unit that can be moved forward and backward in the bore；

The air motor is arranged on slide unit, and the bottom of the slide unit or bore is provided with left air inlet duct and right air inlet duct, described Slide unit is provided with the left air admission hole connected with rotating forward air inlet and the right air admission hole connected with reversion air inlet, the pneumatic horse The rear end reached is provided with steam vent, and the steam vent is communicated with second chamber；

The housing of the pneumatic screw gun is provided with the first venthole for being used for connecting first chamber with external environment condition and use In the second venthole for connecting second chamber with external environment condition；

During the slide unit is movable, the left air inlet duct remains the gas outlet and a left side with No. 2 inlet channels Air admission hole is connected, and is connected while the right air inlet duct is remained with the gas outlet of No. 3 inlet channels and right air admission hole.

Further, the housing of the pneumatic screw gun includes the removable end cap on rear side of bore, and described second goes out Stomata is opened in detachable end and covered, and the size of second venthole is less than the size of air motor rear end steam vent；

First venthole is located on front side of bore, and the screwdriver bit is extend out to outside bore from the first venthole, the spiral shell There is ventilative gap between silk screwdriver bit and the first venthole, the size in the ventilative gap is less than No. 1 inlet channel gas outlet Size.

It is preferred that, provided with two pieces of intersecting vertical clapboards in the hollow handle, the vertical clapboard is by hollow handle Inner chamber is separated into return air chamber, left inlet plenum and right inlet plenum；

The return air chamber is No. 1 inlet channel, and the left inlet plenum is No. 2 inlet channels, and the right inlet plenum is 3 Number inlet channel.

It is preferred that, the size of second venthole is adjustable.

Further, one piece of horizontal baffle is additionally provided with the hollow handle, the horizontal baffle is located at below vertical clapboard, It is concentration inlet plenum below the horizontal baffle；

The horizontal baffle, which is provided with, is respectively used to connect return air chamber, left inlet plenum and right inlet plenum with concentrating inlet plenum Three air through hole, three air through hole control it to select one with concentrating inlet plenum to connect by control valve；

The bottom of the hollow handle is provided with the air pipe connector for being used for being connected concentration inlet plenum with external air source and is used for Control the regulating valve of compressed air air inflow size.

Wherein, the detachable end, which is covered, is additionally provided with for the air-flow for preventing from discharging through the second venthole straight to after-blow Flow skirt, the flow skirt is opening up, so as to guide the air-flow discharged from second venthole to blow out upward.

It is preferred that, the lockable mechanism includes the latch being fixedly connected on air motor housing and installed in pneumatic Self-locking button on screw gun housing, the self-locking button includes a lock pin, after the self-locking button is pressed, institute State lock pin and push against latch, so as to be locked to the position of the air motor.

It is preferred that, the control valve includes trigger, return spring, the deep bead being horizontally placed on below the horizontal baffle And it is horizontally placed on the rotating control panel above the horizontal baffle；

The rear end of the trigger is connected by connecting rod with deep bead, and fresh air inlet is offered on the deep bead, detains described pull Machine can push deep bead and move backward so that the fresh air inlet is communicated with connecting the air through hole of left inlet plenum and right inlet plenum, Unclamp after the trigger, deep bead return under the elastic force effect of return spring so that the fresh air inlet is with connecting return The air through hole of air chamber is communicated；

Two passages are offered on the rotating control panel, it is described when the rotating control panel is in initial position Two passages are communicated with for the air through hole for being connected return air chamber and left inlet plenum respectively, rotate counterclockwise the rotating Control panel may be such that described two passages lead to the air inlet for being connected return air chamber and right inlet plenum respectively to final position Hole is communicated.

In the pneumatic screw gun that the present invention is provided, air motor（The internal structure of air motor can use existing skill Structure in art）Bore is separated into the first chamber on the left of it and the second chamber on the right side of it（This area skill Art personnel should be understood that the outer wall shape of air motor is preferably coincide with bore wall, to improve air-tightness, if certainly the two it Between there is tiny pressure release space and also influence less, but pressure release space can not be excessive, otherwise will cause first chamber and the second chamber Pressure differential is too small between room, it is impossible to pushes against air motor and moves forward and backward）, by injecting air toward first chamber and/or second chamber, So that the air motor left and right sides produces pressure differential, so as to promote air motor to be moved before and after squeezing into direction along screw in bore It is dynamic.When playing screw, constantly toward being passed through air in second chamber so that in second chamber air pressure more than the air pressure in first chamber, So as to promote air motor to be moved along；Beat after the completion of screw action, stop being passed through air into second chamber, while constantly past Air is passed through in first chamber so that air pressure is more than the air pressure in second chamber in first chamber, so as to promote air motor past After be returned to initial position.In general, only sky need to all be injected toward two chambers certainly toward injection air in a chamber Gas is also possible, it is important to produce pressure differential in air motor both sides.It should be noted that the pneumatic screw gun is not limited In above-mentioned working method, for example, it is also possible to set spring in the front end of air motor, air motor is promoted by the elastic force of spring Return is moved backward, while the steam vent of air motor is passed through towards second chamber by the waste gas for discharging air motor Second chamber so that gas is more than pushing force of the spring to its front end to the pressure of air motor rear end in second chamber, so that Air motor is promoted to move forward.It is emphasized that even if the present invention is not referred to, those skilled in the art are based on its knowledge It should also be appreciated that controlling air motor movement when using toward gas generation pressure differential is passed through in first chamber and second chamber During scheme, above-mentioned two chamber is provided with corresponding exhaust structure, and uses spring with producing pressure toward second chamber ventilation Difference come control air motor move scheme when, second chamber should also be as being provided with exhaust structure.

By above description, the pneumatic screw gun that the present invention is provided employs the knot entirely different with background technology Structure, which omits be used to promote the piston machine that air motor and screwdriver bit are moved up in the screw side of squeezing into background technology Structure, overall structure is simpler.

Brief description of the drawings

Fig. 1 is the overall schematic of embodiment in the present invention；

Fig. 2 is the overall structure diagram of air motor in embodiment illustrated in fig. 1；

Fig. 3 is the overall structure diagram of hollow handle in embodiment illustrated in fig. 1；

Fig. 4 is the overall structure diagram of slide unit in embodiment illustrated in fig. 1；

Fig. 5 is the overlooking the structure diagram of horizontal baffle in embodiment illustrated in fig. 1；

Before Fig. 6 is not detained for trigger in embodiment illustrated in fig. 1, the present invention looks up structural representation of deep bead and horizontal baffle；

After Fig. 7 detains for trigger in embodiment illustrated in fig. 1, the present invention looks up structural representation of deep bead and horizontal baffle；

Fig. 8 is the position relationship signal in embodiment illustrated in fig. 1 between deep bead, horizontal baffle and rotating control panel three Figure；

Fig. 9 is the overlooking the structure diagram of rotating control panel in embodiment illustrated in fig. 1；

Figure 10 is the positive structure schematic of screw rack in embodiment illustrated in fig. 1；

In figure：

1 --- bore 2 --- air motor

3 --- screwdriver bit 4 --- continuous nail feeding machanisms

5 --- lockable mechanism 6 --- hollow handles

7 --- slide unit 8 --- removable end caps

9 --- vertical clapboard 10 --- horizontal baffles

11 --- air pipe connector 12 --- regulating valves

13 --- trigger 14 --- return springs

15 --- deep bead 16 --- rotating control panels

1a --- first chamber 1b --- second chamber

1c --- the first venthole 1d --- second venthole

2a --- steam vent 4a --- screw rack

4b --- spring push pedal 5a --- latch

5b --- self-locking button 6a --- No. 1 inlet channel

6b --- No. 2 inlet channel 6c --- No. 3 inlet channels

6d --- concentrating inlet plenum 7a --- left air inlet duct

7b --- right air inlet duct 7c --- left air admission hole

7d --- right air admission hole 8a --- flow skirt

10a --- air through hole 15a --- fresh air inlet

16a --- passage.

Embodiment

In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " top ", The orientation or position relationship of the instruction such as " bottom ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second " etc. It is only used for describing purpose, and it is not intended that indicating or implying relative importance or imply the technical characteristic indicated by indicating Quantity.

The design of the present invention is more clearly understood that for the ease of those skilled in the art, is come with reference to embodiment and accompanying drawing It is further described.

As shown in Fig. 1-4 and 10, a kind of pneumatic screw gun, including

Bore 1, in the housing of pneumatic screw gun；

Air motor 2, in bore 1 and can be squeezed into screw on direction move forward and backward；

Screwdriver bit 3, is connected to air motor 2 and drives rotation by air motor 2, screwdriver bit 3 can be with air motor 2 Squeeze on direction and move forward and backward in screw, for ease of more preferable screwdriver bit 3, used between above-mentioned screwdriver bit 3 and air motor 2 It is detachably connected；

Continuous nail feeding machanism 4, for intermittent toward the front of screwdriver bit 3 conveying screw；In the present invention, continuous nail feeding machanism 4 can with but not It is limited to using the structure shown in Fig. 1, in Fig. 1, continuous nail feeding machanism gives nail mode using spring suppression, specifically, continuous nail feeding machanism 4 Including the screw casket located at the front side of bore 1, it is spring push pedal 4b, spring to be provided with screw casket below screw rack 4a, screw rack 4a Push pedal 4b pushes against screw rack 4a, as shown in Figure 10, and screw rack 4a includes left and right two support bars and between support bar Location rubber ring, location rubber ring is connected on support bar, location rubber ring by tree lace and is provided with breach, can be with when being got so as to screw Easily location rubber ring is squeezed（Head of screw is easier to pass through from location rubber ring）, screw casket front end offer screw outlet, Outlet front end set can the elasticity of opening and closing go out to follow closely mouth, put with the rifle position that goes out for stablizing screw.Screw can the row of being close to vertically It is bonded between row, adjacent two head of screws by a small amount of glue, auxiliary positioning in screw front end insertion location rubber ring.

Bore 1 is separated into the first chamber 1a on front side of it and the second chamber 1b positioned at rear side by air motor 2；

In the present embodiment, by toward injecting gas in first chamber 1a and/or second chamber 1b so that air motor 2 or so Two ends produce pressure differential, are moved forward or backward so as to promote air motor 2 and screwdriver bit 3 to be squeezed into screw on direction.

In the pneumatic screw gun that above-described embodiment is provided, air motor 2（The internal structure of air motor 2 can be used Structure of the prior art）Bore 1 is separated into the first chamber 1a on the left of it and the second chamber on the right side of it 1b（It will be appreciated by those skilled in the art that, the outer wall shape of air motor 2 is preferably coincide with bore wall, to improve air-tightness, If there is tiny pressure release space therebetween certainly also influences less, but pressure release space can not be excessive, otherwise will cause first Pressure differential is too small between chamber 1a and second chamber 1b, it is impossible to pushes against air motor 2 and moves forward and backward）, by toward first chamber 1a and/ Or second chamber 1b injection air so that the left and right sides of air motor 2 produces pressure differential, so as to promote air motor 2 in bore 1 It is interior along screw squeeze into direction move forward and backward.When playing screw, constantly toward being passed through air in second chamber 1b so that in second chamber 1b Air pressure is more than the air pressure in first chamber 1a, so as to promote air motor 2 to be moved along；Beat after the completion of screw action, stop past Air is passed through in second chamber 1b, while constantly toward being passed through air in first chamber 1a so that air pressure is more than in first chamber 1a Air pressure in second chamber 1b, so as to promote air motor 2 to be returned to initial position backward.In general, only need to be toward a chamber Air is injected in room, it is also possible all to inject air toward two chambers certainly, it is important to be produced in the both sides of air motor 2 Raw pressure differential.It should be noted that the pneumatic screw gun is not limited to above-mentioned working method, for example, it is also possible in air motor 2 Front end set spring（Not shown in accompanying drawing）, promote air motor 2 to move return backward by the elastic force of spring, while by gas The steam vent of dynamic motor 2 is towards second chamber 1b, and the waste gas that air motor 2 is discharged is passed through second chamber 1b so that second chamber Gas is more than pushing force of the spring to its front end to the pressure of the rear end of air motor 2 in 1b, so as to promote air motor 2 to transport forward It is dynamic.It is emphasized that even if the present invention is not referred to, those skilled in the art are based on its knowledge and used it should also be appreciated that working as It is above-mentioned when scheme of the gas generation pressure differential to control the movement of air motor 2 is passed through into first chamber 1a and second chamber 1b Two chambers are provided with corresponding exhaust structure, and control gas with producing pressure differential toward second chamber 1b ventilations using spring During the scheme that dynamic motor 2 is moved, second chamber 1b should also be as being provided with exhaust structure.

By above description, the pneumatic screw gun that the present embodiment is provided employs the knot entirely different with background technology Structure, which omits be used to promote the piston machine that air motor 2 and screwdriver bit 3 are moved up in the screw side of squeezing into background technology Structure, overall structure is simpler.

Further, as shown in Figure 1, above-mentioned pneumatic screw gun also includes that line-locked lock can be entered to the position of air motor 2 Locking mechanism 5；

Air motor 2 is provided with rotating forward air inlet and reversion air inlet（Rotate forward air inlet and reversion air inlet does not show in the accompanying drawings Go out）, it is passed through compressed air toward rotating forward air inlet and may be such that the driving screwdriver bit 3 of air motor 2 is rotated forward, compressed air is switched to After reversion air inlet is passed through, it may be such that the driving screwdriver bit 3 of air motor 2 is inverted.So design make it that pneumatic screw gun is same When possess the function of playing screw and back-out screw, when actual use, compressed air is being rotated forward and anti-by air inlet by valve Rotate into switching input between gas port, so that it may so that the correspondence of air motor 2 switches between rotating.When needing screw squeezing into target When in object, the control driving screwdriver bit 3 of air motor 2, which is rotated forward, inserts screws into target object；When needing screw from target When back-outing next in object, air motor 2 is pinned by lockable mechanism 5, prevents it from moving backward, then pushes up screwdriver bit 3 Firmly head of screw, then compressed air is switched into reversion air inlet, the now driving of air motor 2 screwdriver bit 3 is inverted, so that by spiral shell Nail is screwed out from target object to be come.

Further, as Figure 1-4, the lower section of bore 1 is provided with hollow handle 6, the inner chamber of hollow handle 6 provided with logical Cross No. 1 inlet channel 6a, No. 2 inlet channel 6b and No. 3 inlet channel 6c of Valve controlling break-make, No. 1 inlet channel 6a's goes out Gas port is connected with first chamber 1a；

Provided with the slide unit 7 that can be moved forward and backward in bore 1；

Air motor 2 is arranged on slide unit 7, and the bottom 1 of slide unit 7 or bore is provided with left air inlet duct 7a and right air inlet duct 7b（Accompanying drawing In illustrate only left air inlet duct 7a and right air inlet duct 7b is opened in the situation of the bottom of slide unit 7）, slide unit 7 be provided with and rotate forward air inlet The left air admission hole 7c of the mouth connection and right air admission hole 7d connected with reversion air inlet, the rear end of air motor 2 is provided with steam vent 2a, steam vent 2a is communicated with second chamber 1b；

The housing of pneumatic screw gun, which is provided with, to be used for first chamber 1a the first venthole 1c connected with external environment condition and use In the second venthole 1d for connecting second chamber 1b with external environment condition；

During slide unit 7 is movable, left air inlet duct 7a remains the gas outlet and left air inlet with No. 2 inlet channel 6b Hole 7c is connected, and is connected while right air inlet duct 7b is remained with No. 3 inlet channel 6c gas outlet and right air admission hole 7d.

By opening up left air inlet duct 7a and right air inlet duct 7b in the bottom 1 of slide unit 7 or bore, pass through above-mentioned two air inlet duct The gas outlet with No. 2 inlet channel 6b, left air admission hole 7c, No. 3 inlet channel 6c gas outlet and right air admission hole 7d are kept respectively Connection, significantly simplifies the attachment structure between each air flue so that the pneumatic screw gun overall structure is more compact, succinct.

As shown in figure 1, on the basis of previous embodiment, the housing of pneumatic screw gun is included located at the removable of the rear side of bore 1 End cap 8 is unloaded, the second venthole 1d is opened in removable end cap 8, the second venthole 1d size is arranged less than the rear end of air motor 2 Stomata 2a size（Preferably above-mentioned second venthole 1d is designed to that the structure of its size can be adjusted as needed.It is existing There is the structure of a variety of adjustment hole openings of sizes in technology, the present invention is not related to the improvement of this part-structure, therefore does not repeat）；

First venthole 1c is located at the front side of bore 1, and screwdriver bit 3 is extend out to outside bore 1 from the first venthole 1c, screwdriver bit 3 and first have ventilative gap between venthole 1c, and the size in gap of breathing freely is less than the size of No. 1 inlet channel 6a1 gas outlet. First, set removable end cap 8 that dismounting air motor 2 can be allowed more to facilitate in the rear side of bore 1, when needing air motor 2 When being split out out of bore 1, unload removable end cap 8, you can pour air motor 2 from the rear end of bore 1, when need by When air motor 2 loads bore 1, bore 1 is filled in from rear end by air motor 2, removable end cap 8 is then loaded onto.By The two venthole 1d size being dimensioned to less than the rear end steam vent 2a of air motor 2, which is mainly, allows what air motor 2 was discharged The speed that air enters the second cavity 1b is more than the speed that the air in the second cavity 1b is discharged from the second venthole 1d, thus Plug or valve need not be set in the second venthole 1d, ventilative gap is dimensioned to less than No. 1 inlet channel 6a1 Gas outlet size is also based on similar consideration, will not be repeated here.

As a kind of preferred structure, as shown in Figure 3, two pieces of intersecting vertical clapboards 9 are provided with hollow handle 6, vertically The inner chamber of hollow handle 6 is separated into return air chamber, left inlet plenum and right inlet plenum by dividing plate 9；Above-mentioned return air chamber is No. 1 and entered Gas passage 6a, left inlet plenum is No. 2 inlet channel 6b, and right inlet plenum is No. 3 inlet channel 6c.Said structure makes full use of The inner chamber of hollow handle 6, is divided into three chambers by two pieces of vertical clapboards 9 and is used as inlet channel by the inner chamber of hollow handle 6 （Vertical clapboard 9 can be integrally formed with the shell of hollow handle 6 by mould）So that air passage structure is more succinct, compact, pneumatic The dismounting of screw gun also more facilitates.

Further, as shown in Fig. 3,5, one piece of horizontal baffle 10 is additionally provided with hollow handle 6, horizontal baffle 10 is located at perpendicular The lower section of straight baffle 9, the lower section of horizontal baffle 10 is concentration inlet plenum 6d；

Horizontal baffle 10 is provided be respectively used to connect return air chamber, left inlet plenum and right inlet plenum with concentration inlet plenum three Individual air through hole 10a, three air through hole 10a control it to select one with concentrating inlet plenum 6d to connect by control valve；

The bottom of hollow handle 6, which is provided with, to be used for the concentration inlet plenum 6d air pipe connectors 11 being connected with external air source and is used for Control the regulating valve 12 of compressed air air inflow size.Horizontal baffle 10 is separated out concentration air inlet in the inner chamber bottom of hollow handle 6 After the 6d of room, an air pipe connector 11 only need to be first passed through by inlet plenum 6d in compressed air input set, then through control valve control Three air through hole 10a opening and closing can be corresponded to toward return air chamber, left inlet plenum and right inlet plenum supply on horizontal baffle 10（If Do not design concentration inlet plenum 6d, it is necessary to external air source is connected with three air pipe connectors 11, respectively toward above three chamber Supply）, such design significantly simplifies air flue attachment structure.

It is preferred that, as shown in figure 1, being additionally provided with the gas for preventing from discharging through the second venthole 1d in removable end cap 8 The stream straight flow skirt 8a to after-blow, flow skirt 8a is opening up, so as to guide the air-flow discharged from the second venthole 1d Blow out upward, it is to avoid air-flow is just to operating personnel's blow-through, when screw gun is used more conveniently, safely.

In addition, in the present invention, lockable mechanism 5 can be using the structure shown in Fig. 1 and 2, and it includes being fixedly connected on gas Latch 5a and the self-locking button 5b on pneumatic screw gun housing, self-locking button 5b on the dynamic housing of motor 2 Including a lock pin, after self-locking button 5b is pressed, lock pin pushes against latch 5a, so as to the position of air motor 2 Locked.It should be noted that lockable mechanism 5 is not limited to said structure, for example it, which can also be to use, pushes clamping side , there are a variety of locking structures available for the present invention in the locking structure of formula, numerous to list herein in the prior art.

Finally, as a kind of preferred structure, as shown in Fig. 1, Fig. 3 and Fig. 5-9, foregoing control valve includes trigger 13, returned Position spring 14, the deep bead 15 for being horizontally placed on the lower section of horizontal baffle 10 and it is horizontally placed on the positive and negative of the top of horizontal baffle 10 Turn control panel 16；

The rear end of trigger 13 is connected by connecting rod with deep bead 15, and fresh air inlet 15a is offered on deep bead 15, detains trigger 13 Deep bead 15 can be pushed to move backward so that fresh air inlet 15a and the air through hole 10a phases for connecting left inlet plenum and right inlet plenum It is logical, unclamp after trigger 13, the return under the elastic force effect of return spring 14 of deep bead 15 so that fresh air inlet 15a is with connecting return The air through hole 10a of air chamber is communicated；

Two passage 16a are offered on rotating control panel 16, when rotating control panel 16 is in initial position, two lead to Stomata 16a is communicated with for the air through hole 10a for being connected return air chamber and left inlet plenum respectively, rotates counterclockwise rotating control Plate 16 to final position, may be such that two passage 16a respectively with the air through hole for being connected return air chamber and right inlet plenum 10a is communicated.The movable control starter motor 2 that can correspond to of deep bead 15 is controlled to move forward and backward by trigger 13, so that The pneumatic screw gun can be with one-handed performance when playing screw.

Above-described embodiment is the present invention preferably implementation, any aobvious on the premise of the technical program design is not departed from And the replacement being clear to is within protection scope of the present invention.

In order to allow those of ordinary skill in the art more easily to understand improvements of the present invention relative to prior art, this Some accompanying drawings of invention and description have been simplified, and for the sake of clarity, present specification is omitted some other members Element, those of ordinary skill in the art should be aware that these elements omitted also may make up present disclosure.

Claims

1. pneumatic screw gun, including：

Bore（1）, in the housing of the pneumatic screw gun；

Air motor（2）, located at the bore（1）In and can be squeezed into screw on direction move forward and backward；

Screwdriver bit（3）, it is connected to the air motor（2）And by air motor（2）Driving rotation, the screwdriver bit（3） Can be with air motor（2）Squeeze on direction and move forward and backward in screw together；It is preferred that, the screwdriver bit（3）It is detachably connected In air motor（2）；

Continuous nail feeding machanism（4）, for intermittent toward the screwdriver bit（3）Front conveys screw；

The air motor（2）By bore（1）It is separated into the first chamber on front side of it（1a）With positioned at the second of rear side Chamber（1b）；

Pass through the past first chamber（1a）And/or second chamber（1b）Middle injection gas so that the air motor（2）Left and right Two ends produce pressure differential, so as to promote the air motor（2）And screwdriver bit（3）Squeezed into screw on direction forward or backward It is mobile.

2. pneumatic screw gun according to claim 1, it is characterised in that：

Also including can be to air motor（2）Position enter line-locked lockable mechanism（5）；

The air motor（2）Provided with air inlet and reversion air inlet is rotated forward, being passed through compressed air toward the rotating forward air inlet can So that the air motor（2）Drive screwdriver bit（3）Rotate forward, compressed air is switched to from the reversion air inlet and is passed through Afterwards, it may be such that the air motor（2）Drive screwdriver bit（3）Reversion.

3. pneumatic screw gun according to claim 2, it is characterised in that：

The bore（1）Lower section be provided with hollow handle（6）, the hollow handle（6）Inner chamber in be provided with pass through Valve controlling No. 1 inlet channel of break-make（6a）, No. 2 inlet channels（6b）With No. 3 inlet channels（6c）, No. 1 inlet channel（6a）'s Gas outlet and first chamber（1a）Connection；

The bore（1）It is interior provided with the slide unit that can be moved forward and backward（7）；

The air motor（2）Installed in slide unit（7）On, the slide unit（7）Or the bottom of bore（1）Provided with left air inlet duct（7a） With right air inlet duct（7b）, the slide unit（7）It is provided with rotating forward the left air admission hole that air inlet is connected（7c）And with inverting air inlet The right air admission hole of mouth connection（7d）, the air motor（2）Rear end be provided with steam vent（2a）, the steam vent（2a）With second Chamber（1b）Communicate；

The housing of the pneumatic screw gun, which is provided with, to be used for first chamber（1a）The first venthole connected with external environment condition （1c）And for by second chamber（1b）The second venthole connected with external environment condition（1d）；

In the slide unit（7）In movable process, the left air inlet duct（7a）Remain and No. 2 inlet channels（6b）'s Gas outlet and left air admission hole（7c）Connection, while the right air inlet duct（7b）Remain and No. 3 inlet channels（6c）Outlet Mouth and right air admission hole（7d）Connection.

4. pneumatic screw gun according to claim 3, it is characterised in that：

The housing of the pneumatic screw gun includes being located at bore（1）The removable end cap of rear side（8）, second venthole（1d） It is opened in removable end cap（8）On, second venthole（1d）Size be less than air motor（2）Rear end steam vent（2a）'s Size；

First venthole（1c）Positioned at bore（1）Front side, the screwdriver bit（3）From the first venthole（1c）It extend out to rifle Thorax（1）Outside, the screwdriver bit（3）With the first venthole（1c）Between there is ventilative gap, the size in the ventilative gap Less than No. 1 inlet channel（6a1）The size of gas outlet.

5. the pneumatic screw gun according to claim 3 or 4, it is characterised in that：

The hollow handle（6）Inside it is provided with two pieces of intersecting vertical clapboards（9）, the vertical clapboard（9）By hollow handle（6）'s Inner chamber is separated into return air chamber, left inlet plenum and right inlet plenum；

The return air chamber is No. 1 inlet channel（6a）, the left inlet plenum is No. 2 inlet channels（6b）, the right side is entered Air chamber is No. 3 inlet channels（6c）.

6. pneumatic screw gun according to claim 4, it is characterised in that：Second venthole（1d）Size can Adjust.

7. pneumatic screw gun according to claim 5, it is characterised in that：

The hollow handle（6）Inside it is additionally provided with one piece of horizontal baffle（10）, the horizontal baffle（10）Located at vertical clapboard（9）Under Side, the horizontal baffle（10）Lower section is concentration inlet plenum（6d）；

The horizontal baffle（10）It is provided with and is respectively used to return air chamber, left inlet plenum and right inlet plenum with concentrating inlet plenum to connect Three logical air through hole（10a）, three air through hole（10a）It is controlled to select one with concentrating inlet plenum by control valve （6d）Connection；

The hollow handle（6）Bottom be provided be used for will concentrate inlet plenum（6d）The air pipe connector being connected with external air source （11）And for controlling the regulating valve of compressed air air inflow size（12）.

8. pneumatic screw gun according to claim 4, it is characterised in that：The removable end cap（8）Being provided with is used to prevent Only through the second venthole（1d）The straight flow skirt to after-blow of the air-flow of discharge（8a）, the flow skirt（8a）Be open court On, so as to guide from second venthole（1d）The air-flow of discharge is blown out upward.

9. pneumatic screw gun according to claim 2, it is characterised in that：The lockable mechanism（5）Including being fixedly connected on Air motor（2）Latch on housing（5a）And the self-locking button on pneumatic screw gun housing（5b）, it is described Self-locking button（5b）Including a lock pin, the self-locking button（5b）After pressing, the lock pin pushes against latch （5a）, so as to the air motor（2）Position locked.

10. pneumatic screw gun according to claim 7, it is characterised in that：The control valve includes trigger（13）, return bullet Spring（14）, be horizontally placed on the horizontal baffle（10）The deep bead of lower section（15）And it is horizontally placed on the horizontal baffle （10）The rotating control panel of top（16）；

The trigger（13）Rear end pass through connecting rod and deep bead（15）Connection, the deep bead（15）On offer fresh air inlet （15a）, detain the trigger（13）Deep bead can be pushed（15）Move backward so that the fresh air inlet（15a）Enter with connecting a left side The air through hole of air chamber and right inlet plenum（10a）Communicate, unclamp the trigger（13）Afterwards, the deep bead（15）In return spring （14）The lower return of elastic force effect so that the fresh air inlet（15a）Air through hole with connecting return air chamber（10a）Communicate；

The rotating control panel（16）On offer two passages（16a）, when the rotating control panel（16）In first During beginning position, described two passages（16a）Respectively with the air through hole for being connected return air chamber and left inlet plenum（10a）Phase It is logical, rotate counterclockwise the rotating control panel（16）To final position, described two passages are may be such that（16a）Respectively with In the air through hole of connection return air chamber and right inlet plenum（10a）Communicate.