CN107127706B - pneumatic screw gun - Google Patents

Abstract

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

Current most common screw tool of beating is pneumatic screwdriver, and hand operation pneumatic screwdriver, an another are needed when playing screw with pneumatic screwdriver Hand grasps screw, can not one-handed performance.

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

Although the bolting machine that above-mentioned patent is related to, which can be realized, pneumatically plays screw, it is required for configuration to make screwdriver bit （Or further include air motor）The piston that direction is moved is squeezed on edge（Be equivalent to above-mentioned patent exist two groups of actuating units, one Group actuating unit be the air motor for driving 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.

Invention content

The technical problem to be solved in the present invention is to provide a kind of pneumatic screw gun of brand new, the knots 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 adopts the following technical scheme that：A kind of pneumatic screw gun, including

Bore is set in the shell of the pneumatic screw gun；

Air motor in the bore and can be squeezed on direction in screw and be moved forward and backward；

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

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

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

By injecting gas into the first chamber and/or second chamber so that the air motor left and right ends production Raw pressure difference, is moved forward or backward to push the air motor and screwdriver bit to be squeezed on direction in screw.

Preferably, the screwdriver bit is removably connected to air motor.

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

The air motor, which is equipped with, rotates forward air inlet and reversion air inlet, and being passed through compressed air toward the rotating forward air inlet can So that the air motor driving screwdriver bit rotates forward, compressed air is switched to after the reversion air inlet is passed through, can be made Obtain the air motor driving screwdriver bit reversion.

Further, the lower section of the bore is equipped with hollow handle, is equipped in the inner cavity of the hollow handle and 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 to；

The slide unit that can be moved forward and backward is equipped in the bore；

The air motor is mounted on slide unit, and the bottom of the slide unit or bore is equipped with left air inlet duct and right air inlet duct, The slide unit is equipped with and rotates forward the left air admission hole and the right air admission hole being connected to reversion air inlet that air inlet is connected to, the gas The rear end of dynamic motor is equipped with gas vent, and the gas vent is communicated with second chamber；

The shell of the pneumatic screw gun be equipped with the first venthole for first chamber to be connected to external environment with And the second venthole for second chamber to be connected to external environment；

During the slide unit is moved forward and backward, the left air inlet duct remains the gas outlet with No. 2 inlet channels And the connection of left air admission hole, while the right air inlet duct is remained and is connected to the gas outlet of No. 3 inlet channels and right air admission hole.

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

First venthole is located on front side of bore, and the screwdriver bit is extend out to from the first venthole outside bore, institute It states between screwdriver bit and the first venthole and there is ventilative gap, the size in the ventilative gap is less than No. 1 inlet channel outlet The size of mouth.

Preferably, the vertical clapboards of two pieces of intersections are equipped in the hollow handle, the vertical clapboard is by hollow handle Inner cavity is separated into return gas chamber, left inlet plenum and right inlet plenum；

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

Preferably, the size of second venthole is adjustable.

Further, one piece of horizontal baffle is additionally provided in the hollow handle, the horizontal baffle is set to below vertical clapboard, It is concentration inlet plenum below the horizontal baffle；

The horizontal baffle, which is equipped with, to be respectively used to connect return gas chamber, left inlet plenum and right inlet plenum with inlet plenum is concentrated Three logical air through hole, three air through hole by control valve control its select one with concentrate inlet plenum be connected to；

The bottom of the hollow handle be equipped with for will concentrate air pipe connector that inlet plenum connect with external air source and Regulating valve for controlling compressed air air inflow size.

Wherein, the detachable end, which covers, is additionally provided with for preventing the air-flow being discharged through the second venthole straight to after-blow Flow skirt, the flow skirt is opening up, to which the air-flow that guiding is discharged from second venthole is blown out upward.

Preferably, the lockable mechanism includes the latch being fixedly connected on air motor shell and is mounted on pneumatic Self-locking button in screw gun housing body, the self-locking button includes a lock pin, after the self-locking presses key pressing, institute It states lock pin and pushes against latch, to be locked to the position of the air motor.

Preferably, the control valve includes trigger, return spring, the wind shield being horizontally placed below the horizontal baffle And it is horizontally placed on the positive and negative rotation control panel above the horizontal baffle；

The rear end of the trigger is connect by connecting rod with wind shield, and air inlet hole is offered on the wind shield, detains institute It states trigger and can push wind shield and move backward so that the air inlet hole and the air through hole phase for being connected to left inlet plenum and right inlet plenum It is logical, after unclamping the trigger, wind shield return under the elastic force effect of return spring so that the air inlet hole be connected to back The air through hole of position gas chamber communicates；

Venthole there are two being opened up on the positive and negative rotation control panel, when the positive and negative rotation control panel is in initial position, Described two ventholes are communicated with the air through hole for connecting return gas chamber and left inlet plenum respectively, rotate counterclockwise it is described just Control panel is inverted to final position, may make described two ventholes respectively with for connect return gas chamber and right inlet plenum into Vent hole communicates.

In pneumatic screw gun provided by the invention, air motor（Existing skill may be used in the internal structure of air motor 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 field 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 are tiny pressure release gaps also to influence less, but pressure release gap cannot be excessive, otherwise will lead to first chamber and the second chamber Pressure difference is too small between room, can not push against air motor back-and-forth motion）, by injecting air toward first chamber and/or second chamber, So that air motor at left and right sides of generate pressure difference, to push air motor in bore along screw squeeze into direction before and after move It is dynamic.When playing screw, air is constantly passed through into second chamber so that air pressure is more than the air pressure in first chamber in second chamber, To push air motor to be moved along；It beats after the completion of screw action, stops being passed through air into second chamber, while is 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, to push air motor past After be returned to initial position.In general, air only need to be injected into a chamber, all inject sky toward two chambers certainly Gas is also possible, it is important to generate pressure difference in air motor both sides.It should be noted that the pneumatic screw gun and unlimited In above-mentioned working method, for example, it is also possible to which spring is arranged in the front end of air motor, air motor is pushed by the elastic force of spring Return is moved backward, while the gas vent of air motor being passed through towards second chamber by the exhaust gas that air motor is discharged 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, to Air motor is pushed to move forward.It is emphasized that even if the present invention does not refer to, those skilled in the art are based on knowledge It should also be appreciated that when controlling air motor movement using gas generation pressure difference is passed through into first chamber and second chamber When scheme, above-mentioned two chamber is both provided with corresponding exhaust structure, and spring is used to generate pressure with toward second chamber ventilation Difference come control air motor movement scheme when, second chamber should also be as being provided with exhaust structure.

As can be seen from the above description, pneumatic screw gun provided by the invention uses the knot entirely different with background technology Structure, which omits be used to that air motor and screwdriver bit be pushed to squeeze into the piston machine moved on direction in screw in background technology Structure, overall structure are simpler.

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 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 wind shield and horizontal baffle；

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

Fig. 8 is that the position relationship in embodiment illustrated in fig. 1 between wind shield, horizontal baffle and positive and negative rotation control panel three shows It is intended to；

Fig. 9 is the overlooking structure diagram of positive and negative rotation 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 --- wind shield 16 --- positive and negative rotation control panels

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

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

2a --- gas vent 4a --- screw rack

4b --- spring push plate 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 --- air inlet hole

16a --- venthole.

Specific implementation mode

In the description of the present invention, it is to be understood that, term "center", "upper", "lower", "front", "rear", "top", The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second " etc. It is used for description purposes only, is not understood to indicate or imply relative importance or implicitly indicates indicated technical characteristic Quantity.

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

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

Bore 1 is set in the shell of pneumatic screw gun；

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

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

Continuous nail feeding machanism 4 conveys screw for intermittent toward 3 front of screwdriver bit；In the present invention, continuous nail feeding machanism 4 can be with But it is not limited to use structure shown in FIG. 1, in Fig. 1, continuous nail feeding machanism gives nail mode using spring suppression, specifically, sending nail Mechanism 4 includes being set to the screw casket of 1 front side of bore, and screw rack 4a is equipped in screw casket, is spring push plate 4b below screw rack 4a, Spring push plate 4b pushes against screw rack 4a, as shown in Figure 10, screw rack 4a include left and right two support bars and be set to support bar Between location rubber ring, location rubber ring is connected to support bar by tree lace, notch is provided on location rubber ring, when being got so as to screw It can be easier to squeeze location rubber ring（Head of screw is easier to pass through from location rubber ring）, screw casket front end offers screw and goes out Mouthful, the setting of outlet front end can the elasticity of opening and closing go out to follow closely mouth, the rifle position that goes out to stablize screw is set.Screw can be located next to vertically It arranges, is bonded by a small amount of glue between adjacent two head of screws, auxiliary positioning in location rubber ring is inserted into screw front end.

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

In the present embodiment, by injecting gas into first chamber 1a and/or second chamber 1b so that air motor 2 Left and right ends generate pressure difference, are moved forward or backward to push air motor 2 and screwdriver bit 3 to be squeezed on direction in screw It is dynamic.

In the pneumatic screw gun that above-described embodiment provides, air motor 2（The internal structure of air motor 2 may be used Structure in 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 gap therebetween also certainly influences less, but pressure release gap cannot be excessive, otherwise will lead to first Pressure difference is too small between chamber 1a and second chamber 1b, can not push against the back-and-forth motion of air motor 2）, by toward first chamber 1a and/ Or second chamber 1b injects air so that 2 left and right sides of air motor generates pressure difference, to push air motor 2 in bore 1 It is interior to squeeze into direction back-and-forth motion along screw.When playing screw, constantly air is passed through into second chamber 1b so that in second chamber 1b Air pressure is more than the air pressure in first chamber 1a, to push air motor 2 to be moved along；It beats after the completion of screw action, stops past It is passed through air in second chamber 1b, while being constantly passed through air into first chamber 1a so that air pressure is more than in first chamber 1a Air pressure in second chamber 1b, to push air motor 2 to be returned to initial position backward.It 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 2 both sides of air motor Raw pressure difference.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 be arranged spring（It is attached to be not shown in figure）, push air motor 2 to move return backward by the elastic force of spring, while by gas The gas vent of dynamic motor 2 is towards second chamber 1b, and the exhaust 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 2 rear end of air motor in 1b, to push air motor 2 to transport forward It is dynamic.It is emphasized that even if the present invention does not refer to, those skilled in the art are based on knowledge it should also be appreciated that when using It is above-mentioned when being passed through scheme of the gas generation pressure difference to control the movement of air motor 2 into first chamber 1a and second chamber 1b Two chambers are both provided with corresponding exhaust structure, and control gas with pressure difference is generated toward second chamber 1b ventilations using spring When the scheme that dynamic motor 2 moves, second chamber 1b should also be as being provided with exhaust structure.

As can be seen from the above description, pneumatic screw gun provided in this embodiment uses the knot entirely different with background technology Structure, which omits be used to that air motor 2 and screwdriver bit 3 be pushed to squeeze into the piston machine moved on direction in screw in background technology Structure, overall structure are simpler.

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

Air motor 2, which is equipped with, rotates forward air inlet and reversion air inlet（Rotate forward air inlet and reversion air inlet in the accompanying drawings It is not shown）, it is passed through compressed air toward rotating forward air inlet and may make air motor 2 that screwdriver bit 3 is driven to rotate forward, compressed air is cut It changes to after reversion air inlet is passed through, may make air motor 2 that screwdriver bit 3 is driven to invert.Design is so that pneumatic screw in this way Rifle has been provided simultaneously with the function of playing screw and back-out screw, in actual use, compressed air is being rotated forward air inlet by valve Switch input between reversion air inlet, so that it may so that the correspondence of air motor 2 switches between positive and negative rotation.When needing to squeeze into screw When in target object, control air motor 2 drives the rotating forward of screwdriver bit 3 to insert screws into target object；When need by screw from When back-outing next in target object, air motor 2 is lockked by lockable mechanism 5, prevents it from moving backward, then by screwdriver bit 3 withstand head of screw, then compressed air is switched to reversion air inlet, and air motor 2 drives screwdriver bit 3 to invert at this time, to Screw is screwed out to come from target object.

Further, as shown in Figs 1-4, the lower section of bore 1 is equipped with hollow handle 6, is equipped in the inner cavity of hollow handle 6 logical Cross No. 1 inlet channel 6a, No. 2 inlet channel 6b and No. 3 inlet channel 6c of valve control break-make, No. 1 inlet channel 6a's goes out Gas port is connected to first chamber 1a；

The slide unit 7 that can be moved forward and backward is equipped in bore 1；

Air motor 2 is mounted on slide unit 7, and the bottom 1 of slide unit 7 or bore is equipped with left air inlet duct 7a and right air inlet duct 7b （Left air inlet duct 7a is illustrated only in attached drawing and right air inlet duct 7b is opened in the situation of 7 bottom of slide unit）, slide unit 7 be equipped with and rotating forward The left air admission hole 7c of the air inlet connection and right air admission hole 7d being connected to reversion air inlet, the rear end of air motor 2 are equipped with row Stomata 2a, gas vent 2a are communicated with second chamber 1b；

The shell of pneumatic screw gun be equipped with the first venthole 1c for first chamber 1a to be connected to external environment with And the second venthole 1d for second chamber 1b to be connected to external environment；

During slide unit 7 is moved forward and backward, left air inlet duct 7a remains the gas outlet and a left side with No. 2 inlet channel 6b Air admission hole 7c connection, while right air inlet duct 7b is remained and is connected to the gas outlet of No. 3 inlet channel 6c 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 It keeps respectively and the gas outlet of No. 2 inlet channel 6b, left air admission hole 7c, the gas outlet of No. 3 inlet channel 6c and right air admission hole 7d Connection, has significantly simplified the connection 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 shell of pneumatic screw gun includes set on the removable of 1 rear side of bore End cap 8 is unloaded, the second venthole 1d is opened in removable end cap 8, and the size of the second venthole 1d is arranged less than 2 rear end of air motor The size of stomata 2a（Preferably above-mentioned second venthole 1d is designed to adjust the structure of its size as needed.It is existing There are the structures of a variety of adjustment hole openings of sizes, the present invention not to be related to the improvement of this part-structure in technology, therefore does not repeat）；

First venthole 1c is located at 1 front side of bore, and screwdriver bit 3 is extend out to from the first venthole 1c outside bore 1, screw There is ventilative gap between screwdriver bit 3 and the first venthole 1c, the size in gap of breathing freely is less than No. 1 gas outlet inlet channel 6a1 Size.First, dismounting air motor 2 can be allowed more convenient in 1 rear side setting removable end cap 8 of bore, when needs will be pneumatic When motor 2 is split out out of bore 1, removable end cap 8 is unloaded, you can air motor 2 is poured from 1 rear end of bore, when When needing air motor 2 being packed into bore 1, bore 1 is filled in from rear end by air motor 2, then loads onto removable end cap 8 i.e. It can.The size of second venthole 1d being dimensioned to less than 2 rear end gas vent 2a of air motor is mainly allowed into air motor 2 The speed of the air of discharge into the second cavity 1b are more than the speed that the air in the second cavity 1b is discharged from the second venthole 1d, So there is no need to which plug or valve are arranged in the second venthole 1d, by being dimensioned to less than No. 1 air inlet for ventilative gap The channel gas outlets 6a1 size is also based on similar consideration, and details are not described herein.

Structure as one preferred is equipped with the vertical clapboard 9 of two pieces of intersections, vertically as shown in Figure 3 in hollow handle 6 The inner cavity of hollow handle 6 is separated into return gas chamber, left inlet plenum and right inlet plenum by partition board 9；Above-mentioned return gas chamber be No. 1 into Gas channel 6a, left inlet plenum are No. 2 inlet channel 6b, and right inlet plenum is No. 3 inlet channel 6c.Above structure makes full use of The inner cavity of hollow handle 6, is divided into three chambers by the inner cavity of hollow handle 6 by two pieces of vertical clapboards 9 and is used as inlet channel （Vertical clapboard 9 can be integrally formed with the shell of hollow handle 6 by mold）So that air passage structure is more succinct, compact, pneumatically The dismounting of screw gun is also more convenient.

Further, see Fig. 3, shown in 5, one piece of horizontal baffle 10 is additionally provided in hollow handle 6, horizontal baffle 10 is set to perpendicular 9 lower section of straight baffle, 10 lower section of horizontal baffle are concentration inlet plenum 6d；

Horizontal baffle 10, which is equipped with, to be respectively used to return gas chamber, left inlet plenum and right inlet plenum being connected to inlet plenum is concentrated Three air through hole 10a, three air through hole 10a by control valve control its select one with concentrate inlet plenum 6d be connected to；

The bottom of hollow handle 6 be equipped with for will concentrate air pipe connector 11 that inlet plenum 6d connect with external air source and Regulating valve 12 for controlling compressed air air inflow size.Horizontal baffle 10 is separated out concentration in the inner cavity lower part of hollow handle 6 After inlet plenum 6d, 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 The opening and closing of three air through hole 10a can be corresponded on controlled level partition board 10 supplies toward return gas chamber, left inlet plenum and right inlet plenum Gas（Inlet plenum 6d is concentrated if not designing, it is necessary to external air source is connected with three air pipe connectors 11, respectively toward above three Chamber supplies）, such design significantly simplified air flue connection structure.

Preferably, as shown in Figure 1, being additionally provided in removable end cap 8 for preventing the gas through the second venthole 1d discharges For stream straight to the flow skirt 8a of after-blow, flow skirt 8a is opening up, the air-flow being discharged from the second venthole 1d to guiding It blows out upward, avoids air-flow face operating personnel's blow-through, when screw gun uses more conveniently, safely.

In addition, in the present invention, structure shown in Fig. 1 and 2 may be used in lockable mechanism 5 comprising is fixedly connected on gas Latch 5a on 2 shell of dynamic motor and the self-locking button 5b in pneumatic screw gun housing body, self-locking button 5b Including a lock pin, after self-locking button 5b is pressed, lock pin pushes against latch 5a, to the position to air motor 2 It is locked.It should be noted that lockable mechanism 5 is not limited to above structure, such as it can also be using pushing clamping side A variety of locking structures for use in the present invention exist in the prior art in the locking structure of formula, numerous to list herein.

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

The rear end of trigger 13 is connect by connecting rod with wind shield 15, and air inlet hole 15a is offered on wind shield 15, detains and pulls Machine 13 can push wind shield 15 and move backward so that the air inlet hole 15a and air through hole 10a for being connected to left inlet plenum and right inlet plenum Communicate, unclamp trigger 13 after, wind shield 15 return spring 14 elastic force effect under return so that air inlet hole 15a be connected to back The air through hole 10a of position gas chamber is communicated；

Venthole 16a there are two being opened up on positive and negative rotation control panel 16, when positive and negative rotation control panel 16 is in initial position, two A venthole 16a is communicated with the air through hole 10a for connecting return gas chamber and left inlet plenum respectively, rotates counterclockwise positive and negative rotation Control panel 16 to final position, may make two venthole 16a respectively with the air inlet for connecting return gas chamber and right inlet plenum Through-hole 10a is communicated.The control back-and-forth motion of starter motor 2 can be corresponded to by controlling the back-and-forth motion of wind shield 15 by trigger 13, to So that the pneumatic screw gun can be with one-handed performance when playing screw.

Above-described embodiment is the preferable implementation of the present invention, any aobvious under the premise of not departing from the technical program design 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 the improvements of the present invention compared with the existing technology, this Some attached 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 the element that these are omitted also may make up present disclosure.

Claims (11)

1. pneumatic screw gun, including：

Bore (1) is set in the shell of the pneumatic screw gun；

Air motor (2) is set in the bore (1) and can squeeze on direction and be moved forward and backward in screw；

Screwdriver bit (3) is connected to the air motor (2) and drives rotation, the screwdriver bit (3) by air motor (2) It can squeeze on direction and be moved forward and backward in screw with air motor (2)；

Continuous nail feeding machanism (4), for intermittent toward conveying screw in front of the screwdriver bit (3)；

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

By injecting gas into the first chamber (1a) and/or second chamber (1b) so that air motor (2) left and right Both ends generate pressure difference, to push the air motor (2) and screwdriver bit (3) to be squeezed on direction forward or backward in screw It is mobile.

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

Further including can be to the position of air motor (2) into line-locked lockable mechanism (5)；

The air motor (2), which is equipped with, rotates forward air inlet and reversion air inlet, and being passed through compressed air toward the rotating forward air inlet can So that air motor (2) the driving screwdriver bit (3) rotates forward, compressed air is switched to from the reversion air inlet and is passed through Afterwards, it may make the air motor (2) that screwdriver bit (3) is driven to invert.

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

The lower section of the bore (1) is equipped with hollow handle (6), is equipped in the inner cavity of the hollow handle (6) and is controlled by valve No. 1 inlet channel (6a), No. 2 inlet channels (6b) and No. 3 inlet channels (6c) of break-make, No. 1 inlet channel (6a) Gas outlet is connected to first chamber (1a)；

The slide unit (7) that can be moved forward and backward is equipped in the bore (1)；

The air motor (2) is mounted on slide unit (7), and the bottom (1) of the slide unit (7) or bore is equipped with left air inlet duct (7a) With right air inlet duct (7b), the slide unit (7) be equipped with rotate forward the left air admission hole (7c) that be connected to of air inlet and with invert air inlet The rear end of the right air admission hole (7d) of mouth connection, the air motor (2) is equipped with gas vent (2a), the gas vent (2a) and second Chamber (1b) communicates；

The shell of the pneumatic screw gun is equipped with the first venthole for first chamber (1a) to be connected to external environment (1c) and the second venthole (1d) for being used to second chamber (1b) being connected to external environment；

During the slide unit (7) are moved forward and backward, the left air inlet duct (7a) remains and No. 2 inlet channels (6b) Gas outlet and left air admission hole (7c) connection, while the right air inlet duct (7b) remains the outlet with No. 3 inlet channels (6c) Mouth and right air admission hole (7d) connection.

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

The shell of the pneumatic screw gun includes the removable end cap (8) being set on rear side of bore (1), second venthole (1d) It is opened in removable end cap (8), the size of second venthole (1d) is less than air motor (2) rear end gas vent (2a) Size；

First venthole (1c) is located on front side of bore (1), and the screwdriver bit (3) extend out to rifle from the first venthole (1c) Thorax (1) is external, there is ventilative gap, the size in the ventilative gap between the screwdriver bit (3) and the first venthole (1c) The size of less than No. 1 inlet channel (6a) gas outlet.

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

It is equipped with the vertical clapboards (9) of two pieces of intersections in the hollow handle (6), the vertical clapboard (9) is by hollow handle (6) Inner cavity is separated into return gas chamber, left inlet plenum and right inlet plenum；

The return gas chamber is No. 1 inlet channel (6a), and the left inlet plenum is No. 2 inlet channels (6b), it is described it is right into Gas chamber is No. 3 inlet channels (6c).

6. pneumatic screw gun according to claim 4, it is characterised in that：The size of second venthole (1d) can It adjusts.

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

One piece of horizontal baffle (10) is additionally provided in the hollow handle (6), the horizontal baffle (10) is set under vertical clapboard (9) Side, horizontal baffle (10) lower section is concentration inlet plenum (6d)；

The horizontal baffle (10), which is equipped with, to be respectively used to connect return gas chamber, left inlet plenum and right inlet plenum with inlet plenum is concentrated Three logical air through hole (10a), three air through hole (10a) control it by control valve and select one and concentration inlet plenum (6d) is connected to；

The bottom of the hollow handle (6) is equipped with for that will concentrate the air pipe connector that inlet plenum (6d) is connect with external air source (11) and the regulating valve (12) for controlling compressed air air inflow size.

8. pneumatic screw gun according to claim 4, it is characterised in that：The removable end cap (8) is equipped with for preventing Air-flow only through the second venthole (1d) discharge is straight to the flow skirt of after-blow (8a), flow skirt (8a) opening court On, to which the air-flow that guiding is discharged from second venthole (1d) is blown out upward.

9. pneumatic screw gun according to claim 2, it is characterised in that：The lockable mechanism (5) includes being fixedly connected on Latch (5a) on air motor (2) shell and the self-locking button (5b) in pneumatic screw gun housing body, it is described Self-locking button (5b) includes a lock pin, and after the self-locking button (5b) is pressed, the lock pin pushes against latch (5a), to be locked to the position of the air motor (2).

10. pneumatic screw gun according to claim 7, it is characterised in that：The control valve includes trigger (13), return bullet Spring (14), the wind shield (15) being horizontally placed below the horizontal baffle (10) and it is horizontally placed on the horizontal baffle (10) the positive and negative rotation control panel (16) above；

The rear end of the trigger (13) is connect by connecting rod with wind shield (15), and air inlet hole is offered on the wind shield (15) (15a) detains the trigger (13) and can push wind shield (15) and move backward so that the air inlet hole (15a) be connected to it is left into The air through hole (10a) of gas chamber and right inlet plenum communicates, and after unclamping the trigger (13), the wind shield (15) is in return spring (14) the lower return of elastic force effect so that the air inlet hole (15a) communicates with the air through hole (10a) of connection return gas chamber；

It is opened up on the positive and negative rotation control panel (16) there are two venthole (16a), when the positive and negative rotation control panel (16) is in just When beginning position, described two ventholes (16a) respectively with air through hole (10a) phase for connecting return gas chamber and left inlet plenum It is logical, rotate counterclockwise the positive and negative rotation control panel (16) to final position, may make described two ventholes (16a) respectively with It is communicated in the air through hole (10a) of connection return gas chamber and right inlet plenum.

11. pneumatic screw gun according to claim 1, it is characterised in that：The screwdriver bit (3) is removably connected to gas Dynamic motor (2).